JPS5939690A - Display device for height of lift - 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] Displays the height of each insert such as a blackout curtain ν that is raised and lowered on the stage of a theater, assembly hall, gymnasium, etc. Lifting height display device.

Regarding aK, its purpose is to provide a lifting height display device M that can always accurately display the height of a hanging object.

Conventionally, the lifting device for this bucket was as shown in Figure 1, with +11 being a 7-tor connected to an 8-phase power supply (AC3), (2) being a speed reducer, and (3) being a motor 11+. Area speed machine (2
), (4) is a wire rope-like suspension 0-':5 (51 is a winding drum wound with +
61 Ld Reducer (2) and winding drum (4) Fully connected chain (7) A rotary element that is equipped with a rotating disk that rotates in conjunction with the winding drum f41, an optical detection device (none of which are shown), etc., and outputs one pulse signal according to the number of rotations of the winding drum (4). I]-ta, (10) is a control panel equipped with switch buttons (10a) (10bX10c) for lifting and lowering operations, (
1 is the rotary encoder (9) and the operation panel 1fl
Counting, arithmetic circuit, (+2) display drive circuit connected to the output side of l, (13) is a digital display using a light-emitting Tyrard, etc., 04) is a display when the hanging object (7) reaches the upper limit. This is a limit switch that detects this and that.

Now, press the lift switch button (10a) on the operation panel (lO).
), the +11 rotates forward and the hanging row (
5) is wound up on the winding drum (4) and the suspended object (7) rises.

On the other hand, when the lowering switch button: / (10c) k is pressed, the 7-taper Il+ rotates in the opposite direction, the hanging 0-pu (5) is rewound from the take-up drum (4), and the suspended object (7) is descend.

However, if you press the stop switch button 'J (10b) k,
The motor il+ is immediately stopped, and the lifting or lowering of the suspended object (7) is stopped. Here, f is attached to the winding drum (4).
0-talien coater (9) connected by A ratio 111
, a pulse signal (VP) proportional to the rotational speed of the winding drum (4) is counted and sent to the arithmetic circuit (llj).
Non-volatile memory (16) for storing reset data, for upper limit detection Limit switch (1
4) The limit times (~7C) is output from the limit (15) and the reset data to the counter (14) (VR) and the counter (14).
t) The control circuit 07) outputs the readout signal (VS) of the reset digital data, and the data input circuit 07) writes the set data to the non-volatile memory (16). It is composed of The pulse signal (Vp) is counted up in response to the up/down signal (Vd) vc from the operation panel (10) to the calculator (16), and the pulse signal (Vp) is counted up by 52 times. The output changes depending on the rotation speed.

In other words, the output of counter 05) is data corresponding to the height of the hanging object (7), and this data all display unit (1 (6)
), the height of the hanging object (7) is displayed. Next, when the suspended object (7) rises to its upper limit, the suspended object (7) leans on the 4-way switch (14), and at the same time the motor (11) stops and the 4-way switch (14) is turned on, the 3-way switch (Vo) is activated. When the limit signal (VO) is input to the output circuit 1, the reset signal (Vvt) of the counter 05) is output, and the counter (16j) is reset and the Z1 data continues. The signal (VS) is output, reset data is read from the non-volatile memory (1), and this data is reset by the load signal (VL) VC to the counter Q5). ) is the standard data by actually measuring the height of the hanging object (7) when it is made.
This reference data is written in advance from the data input circuit (18) to a non-volatile memory (θG)I/C. Therefore, when the hanging object (7) reaches the upper limit, the standard data N indicating the actual measured height of the hanging object (7) is set in the calculation table (16). The error between the actual height of the suspended object and the height displayed on the display 031 based on the counted output of the suspended object (7) is corrected at the upper limit position of the suspended object (7). Next, when the hanging object (7) is lowered from the upper limit, the difference in brightness corresponds to the number of rotations of the winding drum (4), that is, the number of pulses output from the 0-tag coater (9). Therefore, calculate the value of the count output (N-n) of the counter (15) by subtracting the count (16) and displaying the value based on K as the convexity of the hanging object (7). . Next, raise the hanging object (7) all the way up. /, the number m of pulses output from the TI-tactor (9) is calculated by 12γ, and e1 of the TI-tactor (15) is calculated.
Number output (N - n +m) Displays the VC base value as the convexity of the hanging object (7).

By the way, in this way, the error between the actual height of the hanging object (7) and the height displayed on the display (13) based on the output of Calicita 05) can be corrected at the upper limit position of the hanging object (7). In the case of a small object, the error in the displayed height becomes large when the hanging object (7) is placed at a low level, and the error in the displayed height when the limit switch (14) is activated increases. There was a problem that it was troublesome to recite the whole d1 (1) of 7).
The unwinding length of the hanging rope (6) per revolution in 4) is 1 m, and the number of pulses per revolution of the pulse signal (Vp) output from the (1-talien]-taper (9) is 100. If the upper limit height of the hanging object (7) is 10 m above the floor, and the set data is 1000, and the hanging object (7) is lowered 7 m from the upper limit and lifted to 3 m above the floor, the count value of counter 06) Harisu set data 1000 to 100X7=70
By subtracting 0, the value becomes 300, which is one value, and r800J is displayed as the height of the hanging object (7). However, the unwinding length of the hanging rod (5) per revolution of the winding drum (4) is equal to the diameter of the winding drum (4)! I! ! ! Since it varies due to manufacturing errors, let us assume that the unwinding length of the hanging 0-zu (5) per revolution of the winding drum (4) is 101 cm.
If the hanging object (7) is lowered so that the height displayed on the display (l) becomes r800J as described above, the actual height of the hanging object (7) is 1000-1
01X7=298 (Cm), and the error between the displayed height and the actual height is 7 cm. This error becomes larger as the amount of rice rewound on the hanging rod (5) increases, and the lower the hanging object (7) is set, the larger the error becomes. ) There is a problem that the error due to elongation due to weight cannot be ignored. Once again, the mitsuto switch 0 is activated, and the actual measurement of the height of the suspended object (7) has to be done at a height of 10m above the floor, which is dangerous and also makes it difficult to carry out the actual measurement.1
child. The present invention has been made in view of the above points.

In the following, examples will be explained with reference to Figures II] and 1111.

FIG. 2 shows an embodiment of the present invention, in which the three-way switch (14) in the conventional example (instead, the three-way switch (14) detects when the suspended object (7) reaches the lower limit). A limit switch (14f) is provided, and a limit switch (14f) is provided.
41 is activated, and it is set to 1 to write to the data input circuit (16) from the data input circuit (18). The other configurations and the construction of υ are the same as in the conventional example described above.

Now, in embodiment G, when the hanging object (7) is lowered to the lower limit, the limit switch (14j) is activated and the t-tile+ is stopped, and at the same time the lower limit signal (Vo) is activated.
752 output. When this limit signal (VO) is input to the control circuit 0η, the counter (1
The reset signal (VR) of 6), readout of change t1 soto data, jt (Vs), and 0-do signal (Vt) are sequentially output, and the counter (1511-j is reset and after 1, the non-interruption mode is reset (1511-j). 16) The reset data is set. First, there are errors in the height display caused by variations in the diameter of the winding drum (4), elongation of the hanging wire (5), etc. Here, the height of the suspended object (7) at the time the limit switch 04)' is activated is written in the non-volatile method (16)K to the reset data. This data was actually measured and inputted using the data input circuit θ~, and it is sufficient to actually measure the height of the hanging object (7) from the floor at the lower limit position of the hanging object (7). Therefore, actual measurement work becomes easy. Also, hanging item f71
It is often used at a 1d low position (3 m or less above the floor), but in the example, the display height error is corrected at the lower limit position of the hanging object (7), so when used at a low position, the hanging object (7) The winding weight of the lower lobe (5), i.e. the winding drum (4)
The number of rotations of the winding drum (4) is reduced, and errors in the display height due to variations in the diameter of the winding drum (4) can be reduced.

The present invention is configured as described above, and when the suspended object is lowered to the lower limit and the Lami 1 Soto Switch is activated, the base point of the counter ("j reset data") is reset. Since this reset data is the actual height of the suspended object when the limit switch is activated, the error in the displayed height will be corrected each time the suspended object reaches the lower limit. Even in this case, the error caused by elongation over time is eliminated, and the error at the lower limit position of the suspended object is eliminated. This makes it easier to actually measure the height of the suspended object in order to input all the preset data, and also to prevent variations in the diameter of the winding drum when using the suspended object at a low position. This has the advantage that the error in display caused by this is small.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a conventional example, and FIG. 2 is a schematic configuration diagram of an example (not yet developed), in which (4) is a winding drum, (6) is a hanging zero-pull, (7) is a hanging object, Q5j is a resetter UP/DOWN power supply, o4) is a limit signal/sochi, 061 is a spring volatilization method E IJ, (17) rl'i control circuit, (+5) tj: data input circuit be. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) As the winding drum rotates, the hanging O-zu wound around this winding drum is wound up. Along with lifting things up and down,
In a lifting height display device that digitally displays the height of a suspended object by counting pulse signals corresponding to the rotational speed of the winding drum using a pre-tupple UP1DOWN counter, the height of the suspended object is displayed digitally. A limit switch detects this, and a limit signal output from the limit switch causes the above-mentioned suspension control IL, UP.
A control circuit that sends out a reset signal for the /DOWN power output and a load signal for preset data that should serve as a reference point for counting, and a non-volatile light circuit that stores the preset data that is set in the presetter UP/DOWN power output. It features a data input circuit that writes corresponding reset data to the non-volatile memory VC, and a data input circuit for all stages. Lifting height display device.