JPS5932337B2 - Protruding lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a protruding lifting device mounted on a vehicle or the like for use in monitoring or working at high places.

BACKGROUND OF THE INVENTION There are various types of ejecting devices known in the art, including self-propelled ones and ones mounted on a vehicle, but most of them have the following structures.

In other words, multiple frames are provided inside a basic frame, and the frames are pushed out one after another using ropes, etc., and the entire device requires a large space and is heavy, making it difficult to mount it on a vehicle. This would require a large vehicle, and there would be the inconvenience of having to move the cargo to the top of the device.

Further, a pushing-out device such as a so-called fire engine, in which a plurality of ladders are piled up and pulled up by a winch or the like, has the disadvantage that it is difficult to downsize even if a long length of pushing-out can be obtained.

There is also a known system that uses a hydraulic cylinder to start protruding from the bottom of the tower and lift it up to a high place even if the material does not reach the top of the device. Since they are inseparable from each other, manufacturing costs are high, and the amount of protrusion is small, making it difficult to downsize the entire device.

Furthermore, the present applicant provided a relatively small protruding lifting device (
Japanese Patent Publication No. 54-13888), but this was inconvenient to mount on a vehicle because the height of the machine was high when the lifting device was at the lowest position.

Purpose of the Invention In view of the current state of the prior art, the present invention is smaller and has a larger protrusion than the prior art, and can be driven by a simple prime mover such as a small electric motor. The object of the present invention is to provide a protruding lifting device that has a low overall height and is convenient to be installed in vehicles such as small automobiles.

Structure of the Invention The characteristic structure of the present invention for achieving the above-mentioned object is that a plurality of cylinders having different diameters are housed in an approximately concentric arrangement in an outer cylinder set upright on a mounting base so as to be able to move in and out of each other. The outermost cylinder among the cylinders can be moved in and out of the outer cylinder by a motor via a pinion rack mechanism, and the movement of the outermost cylinder into and out causes each of the inner cylinders to move into and out of the outer cylinder adjacent to each other. a lifting drive machine that is moved in and out of the cylinders, and supported at the upper end of the cylinder located in the center of the lifting drive machine,
A pair of guide rails oriented in the direction of ingress and egress of the cylinder, and a pair of multi-stage elevators in which a first elevator frame that is the innermost part of the guide rails is slidably supported, and the multi-stage elevators include a plurality of elevators. Lifting frames adjacent to each other in the longitudinal direction are slidably connected, and the innermost first lifting frame is moved in the direction of expansion and contraction with respect to the guide rail by the movement of the cylinder of the lifting drive machine into and out. The invention is characterized in that the first lifting frame is slid in and out of the guide rail, and the outer lifting frames adjacent to each other are slid in the in/out direction with respect to the inner lifting frame. Combining a lifting 1 drive machine consisting of a multistage cylinder driven and sequentially extended by a motor via a pinion rack mechanism and a multistage elevator in which a multistage lifting frame is sequentially extended, which is a protruding lifting device. The above objective was achieved.

Example Next, an example of implementation of the present invention will be described with reference to the drawings.

This protruding lifting device is a lifting drive unit A (!) that expands and contracts by itself.
: It is composed of a pair of multi-stage elevators B and Ba that are supported by this elevator drive machine and extend and contract.

The elevating drive device A has a cylindrical outer cylinder 2 with an open top end, which stands on the upper surface of the installation base 1.

At the center of the cylinder 2, there is also an inner cylinder 3, which is also erected on the upper surface of the installation base 1, and is concentrically arranged with the outer cylinder 2.

A first cylinder 4 is provided between the outer cylinder 2 and the inner cylinder 3.
is installed so that it can be moved in and out.

This first cylinder 4 has an outer cylinder part 4at and an inner cylinder part 4b which are arranged concentrically with each other, and a bottom wall 4c which integrates these parts.
The inner tube 3 described above is inserted inside the cylindrical portion 4b.

Further, a rack 5 oriented in the vertical direction is carved on the outer surface of the outer cylindrical portion 4a, and a pinion gear 6 for moving the rack 5 up and down is meshed with the rack 5.

The pinion gear 6 is pivotally supported within a gear box γ attached to the upper end of the outer cylinder 2, and is rotated by a geared motor 8 with a brake.

A second cylinder 9 is fitted between the inner and outer cylindrical parts 4a and 4b of the first cylinder 4 so as to be freely removable and removable.

On the other hand, small pulleys 1o and ii are attached to the upper and lower parts of the first cylinder 4, respectively.
A climbing rope 12 is wrapped around the other small pulley 11, and a descending rope 13 is wrapped around the other small pulley 11. The lowering rope 13 has one end fixed to the upper end of the inner cylinder 3 and the other end fixed to the upper part of the second cylinder 9, so that the first cylinder 4 is moved in the projecting direction by the rotation of the pinion gear 6. and ascending rope 12
When the second cylinder 9 is forcibly slid in the direction of protruding from the first cylinder 4, and the first cylinder 4 is moved in the retracting direction, the second cylinder 9 is forced to be retracted by the descending rope 13. It is designed to be slid.

A horizontally disposed support arm 14 is provided protruding from the upper end of the second cylinder 9, which is located at the innermost position of the lifting drive unit A constructed as described above, through a receiving cap 15.

This support arm 14 has a pair of guide rails 16 vertically arranged symmetrically around the second cylinder 9.
．． 16 is integrally provided, and multistage elevators B, B are supported by both guide rails 16.16, respectively.

The multistage elevator B has first and second elevator frames 21 and 22 and an elevator frame 23.

The cross section of the first lifting frame 21 that fits into the guide rail 16 is C.
A guide rail sliding portion 21a having a channel-shaped guide rail and a rail portion 21b for a second lifting frame having a C-shaped channel cross section arranged back to back to this are integrally molded, and inside the guide rail sliding portion 21a. The guide rail 16 is fitted into the second lifting frame 22, and the second lifting frame 22 is fitted into the second lifting rail part 21.

The second elevating frame 22 has grooves 22a, 22a formed in the longitudinal direction on both sides thereof, and a sliding portion 2 having a C-shaped channel shape in cross section that fits into the rail portion 21 described above.
2b and a rectangular tube-shaped rail portion 22C for the lifting platform frame 23.
, : are integrally provided, and this rail portion 22C has a cross section of C.
A frame 23 for an elevator platform having a molded channel shape is slidably fitted therein.

On the other hand, on the support arm 14 and on the first and second lifting frames 21.
Pulleys 24, 25, and 26 are attached to the upper ends of 22, respectively, and first, second, and third lifting ropes 27, 28, and 29 are wound around them, respectively.

The first lifting rope 27 is hung on a pulley 24 on the support arm 14, has one end attached to an arm portion 4d protruding from the upper end of the first cylinder 4, and the other end passed through the guide rail 16 to the inner bottom of the first lifting frame 21. are fixed to each.

The second lifting rope 28 is passed around a pulley 25 on the first lifting frame 21, and has one end fixed to the upper end of the support arm 14 and the other end fixed to the inner bottom of the second lifting frame 22.

Furthermore, the third lifting rope 29 is connected to the pulley 2 on the second lifting frame 22.
6? The hook is rotated, and one end is fixed to the upper end of the first elevating frame 21, and the other end is fixed to the elevating platform frame 23, respectively.

Then, the second cylinder 9 rises relative to the first cylinder 4 (the first lifting frame 21 is pulled up by the first lifting rope 27, and the second lifting frame 21 rises relative to the guide rail 16). The second lifting frame 22 is pulled up by the lifting rope 28, and further, as the second lifting frame 22 rises relative to the first lifting frame 21, the third lifting rope 29 pulls up the lifting frame 23. There is.

Furthermore, on the lower surface of the arm portion 4d at the upper end of the first cylinder 4, a pulley support rod 30 for lowering the lifting frame is attached to the gearbox 7.
A pulley 31 is attached to the lower end of the pulley 31, and a pulley 32 is attached to the gearbox γ adjacent to the pulley support rod insertion hole 30a.

Then, one end of the first descending rope 33 is connected to the pulley support rod 30.
The other end is fixed to the lower end of the first elevating frame 21, and the other end is fixed to the lower end of the first lifting frame 21.

In addition, pulleys 34.35 are attached to the lower ends of both the first and second lifting frames 21.22, and second and third lowering ropes 36, 37 are hooked around them, respectively.

The second descending rope 36 is hooked around the pulley 34 of the first lifting frame 21, and has one end at the lower end of the guide rail 16 and the other end at the second lower end.
The third lowering lobes 37 are fixed to the lower ends of the lifting frame 22, and are hooked around the pulleys 35 of the second lifting frame 22, with one end attached to the inner upper end of the first lifting frame 21 and the other end attached to the lifting platform frame. 23
is fixed to.

However, as the second cylinder 9 is drawn into the first cylinder 4, contrary to the action of the above-mentioned ascending ropes, the boxes 1,
Both second elevating frames 21 and 22 and the elevating table frame 23 are forced to be lowered.

A pair of elevator platform receiving plates 38.38 are fixed to the outer surfaces of the elevator platform frames 23.23 of each of the pair of multi-stage elevators B and B configured in this way and protrude to the front side.
8. A lifting platform 39 is installed between 38 and 38.

Note that 40.40 in the figure is a connecting member that connects the first lifting frame 21.21.

Further, in the above-described embodiment, ropes for ascending and descending are used, but these may also be chains.

Effects of the Invention The protruding lifting device of the present invention is constructed as described above, and by raising and lowering the outermost cylinder of a plurality of cylinders using a pinion rack mechanism, the inner cylinders are sequentially moved in and out of the outer cylinder. It is equipped with an elevating drive mechanism that is a multi-stage cylinder, and is supported by the cylinder located at the center of this elevating drive structure, and its expansion and contraction ζ allows the multi-staged elevating frame to move upwards and downwards relative to the inner elevating frame. By connecting multi-stage elevators in which the lifting frame slides sequentially (this allows us to obtain a lifting device with an extremely large amount of protrusion using a simple drive source such as an electric motor, making it possible to achieve the lowest possible size with a simple device. Its overall height is low, making it easy to install in small vehicles.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a rear view showing the overall outline of the projecting state, FIG. 2 is a side view of the same,
Fig. 3 is a side view of the same collapse state, Fig. 4 is a vertical sectional view of the lifting drive, Fig. 5 is a longitudinal sectional front view of the multi-stage elevator section, and Fig. 6 is the T in Fig. 5. -I line sectional view. A...Elevating drive machine, B...Multi-stage elevator, 1...Installation stand, 2...Outer cylinder, 4...
...1st cylinder, 5...Rack, 6.
...Pinion, 9...2nd cylinder,
14... Support arm, 16... Guide rail, 22... First lifting frame, 22...
・Second lifting frame, 23... Frame for lifting platform.

Claims (1)

[Claims] 1. A plurality of cylinders having different diameters are housed in an approximately concentric arrangement in an outer cylinder set upright on a mounting base, each of which can be moved in and out of the other,
The outermost cylinder among the cylinders can be moved in and out of the outer cylinder by a motor through a pinion rack mechanism, and the movement of the outermost cylinder into and out causes each inner cylinder to become adjacent to the outer cylinder. a lifting drive machine which is operated each winter for entering the mountain; a pair of guide rails supported at the upper end of a cylinder located in the center of the lifting drive machine and oriented in the direction of entry and exit of the cylinder;
a pair of multi-stage elevators in which a first elevator frame located at the innermost side is slidably supported with respect to both guide rails, and the multi-stage elevator slides adjacent elevator frames in the longitudinal direction thereof. The first lifting frame, which is the innermost one of them, is slid in the direction of the expansion and contraction force with respect to the guide rail by the movement of the cylinder of the lifting drive machine in and out. A protruding lifting device characterized in that the outer lifting frames adjacent to each other are slid in the in/out direction with respect to the inner lifting frame by moving in and out of the guide rail.