JPS6151496A - Expansion type elevator - 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] [Technical Field of the Invention] The present invention relates to a robot or automatic manufacturing machine that normally
This relates to a telescopic lifting device that is kept in a compact state so as not to take up space, and then expands to the required height when lifting the loaded object to the desired height.

[Technical background of the invention and its problems]

BACKGROUND ART Hitherto, Id, a wire-driven work tower for performing work at high places, has been widely known as this type of lifting device. In the case of this wire drive, as shown in Figure 3,
2 is continuous across the multi-tier frame 23 of all stages of the tower.As a result, it is extremely difficult to assemble, and in the case of a multi-tiered type, there is no consistency in which level the elevator starts going up and down, as shown in Figure 4. There were unstable factors such as the ascending and descending order being determined depending on the size of the loss of the guide portion 24 of the part, and therefore it was necessary to provide a special order adjusting device.

The irregular ascending and descending order is a serious problem from the viewpoint of control and safety.

Furthermore, since the wire 22 is continuous across all stages, if the wire 22 were to break by accident, it would fall across all stages, which was very dangerous.

For this reason, it was necessary to provide special fall prevention equipment, and there were also 1=i, +iji where the i position was ``A''> 9 +, U, and it was difficult to operate the 1 interval [Purpose of the invention ] The present invention has been made to eliminate the shoulder point between the anterior arch and the shoulder point, and its purpose is to separate the wire from the intermediate stage (with the movable pulley provided at C as the boundary, and to separate the V from each stage, Movement of the frame in the middle stage: Therefore, by having one movable pulley attached to that frame and making the frame in the next stage constantly move, there is no need for a lifting sequence adjustment device.
Even if one wire were to break, only one tier would fall and the effect would not affect all tiers, and the lifting and lowering starts at 7C between each tier, making the movement smooth, easy to assemble and disassemble, and with light ridges. An object of the present invention is to provide a telescopic lifting device.

[Summary of the invention]

The present invention includes a multi-stage frame on which a load is mounted and can withstand heavy loads and moment loads, a guide section that guides the linear movement of this frame, a wire or chain that transmits force to this frame, and converts the direction of force. A movable pulley and a second
The telescoping lifting device includes a device for powering the stage frames and a stopper for each stage as its constituent elements (by attaching a pulley gold film that acts as a movable pulley to the intermediate stage frame of the above-mentioned frames). By driving the second stage frame up and down by the drive device provided on the first stage frame, the second stage frame!
The frames after i can be moved up and down.In particular, the wire is fixed at one end on the first stage, passes through a movable pulley on the second stage frame, and is connected to the other end below the third stage frame. This telescopic lifting device is characterized by the fact that there is no continuous wire hanging over all stages to fix the terminal.

〔Effect of the invention〕

Because it is a wire drive system, it requires less space for drive, has a compact appearance, and is also lightweight.

In order to improve the shortcomings of conventional wire-driven lifting devices, such as difficulty in assembly, danger of wire breakage, and inability to determine the order of lifting and lowering, wires are provided independently at each stage, making assembly easier. (...), lifting starts between each stage, eliminating the need for a lifting sequence adjustment device, and
In the unlikely event that the main wire breaks, the first stage C will fall, and it will not spread to all stages, so it will be safe, and the lower stage (for example, the second stage of Fi)
the slow speed.

Even when using a high-force, e.g., air cylinder or hydraulic 7IJ machine, this elevator can lift up to 1I due to the speed increase function of 2.
llll! As an alternative to the A1 electric cylinder for lifting and lowering objects at high speeds, it is significantly cheaper and lighter than the conventional method using ball screws, etc.
:The effects are tremendous, as it can be immediately applied to equipment that requires remote control or computer control, such as the lV Koyo C1 robot.
be.

[Embodiment J of the invention The pathogenesis of C will be explained below using actual examples shown in the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of a lifting device according to the present invention.

In the figure, 1 is a first-stage frame, 2 is a second-stage frame, and 3 is a third-stage frame, each of which is a 4 nm 4v frame, and in this embodiment is made of a square tube. Further, 5 is a base for fixing the lifting device. 7 is a motor, 8 is a gear reducer, 9 is a worm gear, 10 is a worm wheel, and 7 to 1o constitute a power system. 11 and 12 are chain sprockets that transmit the output of the power system to the chain 13. The intermediate point of this chain 13 is fixed to the second stage frame 2, and the second stage frame 2 is driven downward by rotation of the sprocket (all).

14 is a movable pulley α provided at the end of the second stage frame 21, and a wire 15 is hung thereon. When the second stage frame 2 goes up and down, the third frame 3 goes up and down because one end of the wire 15 is fixed to the lower part of the third stage frame 3.

Similarly, the wire 18 is driven by the movable pulley b17.
The fourth stage frame 4 moves up and down.

Guide rollers 6 are provided at each stage except the E-most stage. The purpose of the guide roller is to withstand the moment of eccentric load due to wire drive, and to
It withstands moment loads due to eccentric loads, and linearly guides the movement of each stage with its low dimensions.

Taking a four-stage type as an example, the load distribution and moving speed of each part are shown in Figure 2. Note that this figure 2 is similar to the figure 1.
It is also a diagram showing the diagram when it is expanded, whereas it is a diagram when it is compressed.

The force t/i required to press and lift the second depression is three times the applied load if the weight of the device is not bent. Further, if the speed of the second stage is 12, the speed of the fourth stage is 3v2.

This load distribution is as follows: W = negative load Wl - dead weight of the fourth retracted frame, W2 - dead weight of the third stage frame, W3 - dead weight of the second stage frame, T, = tension applied to the wire 18, T2 -
The tension applied to the wire 15, Fl - the force for inserting the third stage frame, and F2 = the force for inserting the second stage frame, have the following relationship. PCl, T ”t b weight distribution numerator, = input V + W.

FH=2TI + IO2=2 (W+ +n1)
+w2T,=F.

F, = 2T2 T1+W3=2(W+w1)+w
t) (W+wll+l'n,', F,=3W+
3+n, +2vu, +w.

If the displacement of the second stage is y2, the displacement of the fourth stage y4 is y4
= 3 Yt. In other words, if the speed of the second stage is v2, the speed v4 of the fourth stage is v4=3υ.

In other words, it is a speed increasing mechanism that allows the upper tier to move faster relative to the floor, and conversely, the load on the upper tier wire is reduced. This i
Depending on the quality, the upper wire may be thinner to make it lighter, while the lower wire requires a strong chain, etc. to increase the stability of the lifting device. , this property works in a positive direction, that is, the E part is light and the lower part is heavy, which lowers the center of gravity.

Although these embodiments have been described using a four-stage elevating device as an example, it is of course possible to use a multi-stage device having four or more stages.

By repeating the principle described above, a multi-stage elevating device can be easily obtained.

[Other embodiments of the invention]

In FIG. 1, the second stage frame 2 may be driven by an air cylinder, a hydraulic cylinder, etc., instead of a motor or a chain.

Also, the number of stages is not limited to four as in this embodiment, but it may be more than three stages (see below).

In this example, the length can be reduced to 4 m per extension, but it is also possible to extend the length in multiple stages to 1077 L.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the lifting device according to the present invention, Fig. 2 is a cross-sectional view showing the elevating device when it is retracted, Fig. 3 is a cross-sectional view showing a conventional device, and Fig. 4 is a guide FIG. 1-1'41 Stage 7 L/-m, 2...2nd sunken frame. 3...M 312 frames, 4...4th stage frame 1
1゜5...base 6...guy h' a
-La. 7. Motor, 8. Gear head. 9... Worm gear, 10... Worm wheel. 11... Sprocket a, 12... Sprocket b. 13...Chae 7 14...Moving pulley a. 15...wire, 16...fixing part. 17...Moving pulley 1), 18...Wire. 19...No need to worry A, 20
... Pickled '1 No B. 21...stopper. Agent Patent attorney Kensuke Chika (and 1 other person) Figure 3 Figure 4

Claims (1)

[Claims] (1) A multi-stage frame that carries a load and withstands weight and moment loads, a guide section that guides the linear movement of this frame, a wire or chain that transmits force to this frame, and a movement that changes the direction of force. In a telescopic lifting device that includes a pulley, a device for applying power to a second-stage frame, and a stopper for each stage as components, by providing a pulley that acts as a movable pulley on an intermediate stage of the frames. A telescopic elevating device in which frames from the second stage onwards can be raised and lowered by driving the second stage frame up and down using a drive device provided on the first stage frame.