WO2004089802A1

WO2004089802A1 - Weighing device of elevator

Info

Publication number: WO2004089802A1
Application number: PCT/JP2003/004404
Authority: WO
Inventors: Yukihiro Takigawa
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2003-04-07
Filing date: 2003-04-07
Publication date: 2004-10-21
Also published as: EP1612176A4; CN1665737A; JPWO2004089802A1; EP1612176A1

Abstract

A weighing device of an elevator, wherein a rotation support stand supporting the total of tensions acting on the end parts of main ropes and rotated according to the magnitude of the total of the tensions is rotatably installed on a main rope support part, an elastic member extended and retracted according to the total of the tensions is installed between the rotation support stand and the main rope support part, and a detector outputs signals according to the rotating position of the rotation support stand.

Description

Description Elevator overnight balance device Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator weighing apparatus for measuring a load on a car. Background art

In general, a car is suspended in a hoistway by a plurality of main ropes during the night. For example, in a 2: 1 mouth-to-bing elevator, the tension generated at the end of the main rope is received by the main rope receiving section at the top of the hoistway. The main cable receiving portion is, for example, a member such as a beam fixed to an upper portion in a hoistway, or a floor portion of a machine room.

A rope cycle is connected to the end of each main rope, and a shirt-clamp spring that expands and contracts according to the tension generated at the end of the main rope is provided between each rope shirtle and the main rope receiving section. Have been.

In addition, a weighing device is provided in the main cable receiving part, and the load fluctuation in the car due to passengers and luggage is measured. When the load in the car exceeds the rated load, the car is prevented from moving up and down. Further, the driving force generated by the driving device is controlled according to the load.

For example, in the conventional weighing device disclosed in Japanese Patent Publication No. 8-5605, a detection plate is mounted on two or three shirt loop springs. Then, the load on the car is detected by detecting the displacement of the detection plate accompanying the displacement of the rope shirtcle.

However, in the conventional weighing device, the inclination of the rope shirt and the main rope changes depending on the position of the car. Errors sometimes occurred. For this reason, the driving output at the time of starting the elevator overnight may become larger or smaller than the actually required force, and the riding comfort may be deteriorated. Disclosure of the invention

The present invention has been made to solve the above-described problems, and has as its object to obtain an elevator weighing apparatus capable of improving measurement accuracy.

An elevator weighing device according to the present invention is provided between a plurality of rope clasps connected to ends of a plurality of main ropes and a main rope receiving section that receives tension acting on the ends of the main ropes, A rotation support base that detects the weight of the car from the tension, is rotatably provided in the main cable receiving portion, supports the total tension, and is rotated according to the magnitude of the total tension. An elastic member is provided between the rotation support base and the main cable receiving portion, and expands and contracts according to the total tension, and a detector that outputs a signal corresponding to the rotation position of the rotation support base is provided. ing. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a configuration diagram showing an elevator according to Embodiment 1 of the present invention,

FIG. 2 is a side view showing the weighing device of FIG. 1,

FIG. 3 is a plan view showing the weighing device of FIG. 2,

FIG. 4 is a side view showing an elevator weighing apparatus according to Embodiment 2 of the present invention, and FIG. 5 is a plan view showing an elevator weighing apparatus according to Embodiment 3 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1

FIG. 1 is a configuration diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided above the hoistway 1. In the machine room 2, a driving device (winding machine) 3 having a driving sheave 3a is installed. A plurality of (only one is shown in FIG. 1) main ropes 4 are wound around the driving sheave 3a.

The car 5 and the counterweight 6 are suspended in the hoistway 1 by the main rope 4, and are lifted and lowered in the hoistway 1 by the driving force of the driving device 3. The car 5 has a car frame 7 and a car room 8 supported in the car frame 7. At the upper part (upper beam) of the car frame 7, a pair of car suspension wheels 9a and 9b around which the main rope 4 is wound are provided. Counterweight 6 In the upper part of the vehicle, a counterweight suspension wheel 10 around which the main rope 4 is wound is provided. The main rope 4 has a car side end 4a and a counterweight side end 4b. The car side end 4a is connected to the machine room floor 2a, which is a main rope receiving portion, through a car side cleat 11. The counterweight side end 4b is connected to the machine room floor 2a via the counterweight side cleat 12. That is, the tension generated at the car side end 4a and the counterweight side end 4b is received by the machine room floor 2a.

The main rope 4 is wound from the car side end 4 a in the order of the car suspension wheels 9 a, 9 b, the drive sheave 3 a and the counterweight suspension wheel 10, and the counterweight side end 4. It has reached b. That is, the car 5 and the counterweight 6 are suspended by a 2: 1 roving method.

A weighing device 13 for measuring the loaded load of the car 5 is provided between the car-side cleat 11 and the machine room floor 2a.

Here, 2: In the single-buffing method, the number of main ropes 4 is N, the weight of car 5 is W c, and the car side of main ropes 4 Assuming that the weight of the main rope 4 is Wr and the load in the cabin 8 is W, the tension P generated at the car side of one main rope 4 is

P = (W c + W r + W) / (2 x N)

No. ·

When the load W is zero (no load),

P two (W c + W r) / (2 x N)

It becomes.

However, W r changes depending on the position of the car 5.

Next, FIG. 2 is a side view showing the weighing device 13 of FIG. 1, and FIG. 3 is a plan view showing the weighing device 13 of FIG. In the figure, each car-side cleat 11 includes a shirt load 14 connected to the car-side end 4 a, an individual spring receiver (upper spring support) 15 attached to the upper end of the shuttle load 14, It has a shackle spring 16 that abuts on the individual spring receiver 15 and expands and contracts in accordance with the tension generated at the car-side end 4a.

A base 20 is fixed on the machine room floor 2a. A bearing 21 is fixed on the base 20. The bearing 21 is provided with a horizontally extending rotating shaft 23. Have been. The rotation support 23 is attached to the rotation shaft 23 so as to be rotatable around the rotation shaft 23.

The rotation support 24 has a common spring receiver (lower spring receiver) 25 that receives the lower ends of all the shirt clasps 16. The common spring receiver 25 is provided with a plurality of cleat through holes 25 a through which the shirt loop rod 14 passes. The rotation support 24 supports the total tension generated at the car-side end 4a.

A pair of weighing springs 26 as elastic members is provided between the common spring receiver 25 and the base 20. The rotation support base 24 is rotated according to the magnitude of the total tension generated at the car-side end 4a. The weighing spring 26 expands and contracts according to the total amount of tension generated at the car side end 4a.

An operating piece 27 is fixed to the tip of the common spring receiver 25. A detector 28 that outputs a signal according to the rotation position of the rotation support base 24 is disposed on the disk 20. The detector 28 has a cylindrical coil part 29 and an iron core part 30 passed through the coil part 29. The coil part 29 is fixed to the base 20, and the iron core part 30 is moved up and down in the coil part 29 with the up and down movement of the operation piece 27. Detector 28 is connected to an elevator control panel (not shown) via signal line 31 o

The weighing device 13 includes a pace 20, a bearing 21, a rotating shaft 23, a rotating support 24 including a common spring receiver 25, a weighing spring 26, a moving piece 27, and a detector 2. 8, and the signal line 31.

In such a weighing device 13, the rotation support 24 is rotated about the rotation shaft 23 according to the total amount of tension generated at the car side end 4 a, and the rotation support The movement piece 27 is displaced in the vertical direction by the rotation of 24. The displacement of the operation piece 27 is detected by the detector 28, and a signal corresponding to the rotation position of the rotation support base 24 is output from the detector 28.

The signal output from the detector 28 is sent to the control panel via the signal line 31. In the elevator control panel, a change in the total tension generated at the car side end 4a is determined by a signal from the detector 28.

That is, the amount of movement of the moving piece 27 in the vertical direction is converted into an electric quantity (voltage) by the detector 28. Is converted and output as a signal. The change in the amount of electricity that changes in proportion to the vertical movement of the motion piece 27 is proportional to the change in the tension of the main rope 4, so that the change in the tension can be obtained from the amount of electricity.

Here, what is directly obtained from the signal from the detector 28 is a change in the total tension generated at the car side end 4 a of the main rope 4, and this change includes the loading load in the car room 8. In addition to the change in the position of the car 5, the change in the weight of the car side of the main rope 4 is also included. Such a total of the tensions affects the driving torque of the driving device 3, and the ride comfort can be improved by controlling the driving output at the time of starting according to the change in the tension.

Further, the change in the loaded load in the car room 8 can be obtained from the change in the tension generated at the car side end 4a. That is, as described above, the tension P includes the weight Wc of the car 5 and the weight Wr of the car side portion of the main rope 4 in addition to the load W, but the weight Wc of the car 5 Is a known value, and the weight W r of the main rope 4 can be easily obtained from the position of the car 5.

The total tension Pt generated at the car side end 4a is

P t = P X 11 = (Wc + Wr + W) / 2

It is.

Since the tension Pt can be obtained by a signal from the detector 28, the load W in the cab 8 is

W = 2 Pt -Wc-Wr

It becomes.

Wr is easily determined according to the position of the car 5.

In such a weighing device 13, since the rotation support base 24 is rotated according to the tension generated at the car side end 4 a without being affected by the change in the inclination of the main rope 4, the car room 8 It is possible to improve the measurement accuracy of the loaded load in the inside. Also, regardless of the number of main ropes 4, only one detector 28 needs to be used, so that the weighing device 13 can be reduced in price. Embodiment 2. Next, FIG. 4 is a side view showing an elevator weighing apparatus according to Embodiment 2 of the present invention. In the figure, a detection piece 32 is fixed to the tip of the common spring receiver 25. On the base 20, a detector 33 that outputs a signal according to the rotation position of the rotation support stand 24 is arranged. The detector 33 is disposed so as to face the detected piece 32 and detects a distance between the detected piece 32 and the detected piece 32.

Further, as the detector 33, for example, a well-known distance sensor using capacitance, change in magnetic flux, reflection of detection light, or the like can be used. That is, the detector 33 detects the distance to the test piece 32 without contact with the test piece 32. The detector 33 is connected to the elevator control panel via a signal line 31. Other configurations are the same as those of the first embodiment.

As described above, even if the non-contact type detector 33 is used, the measurement accuracy of the loaded load in the car room 8 can be improved, and the cost of the weighing device can be reduced. In addition, the mechanical life of the non-contact type detector 33 is longer than that of the type with a sliding part, so that the overall life of the weighing device can be extended and maintenance work is reduced. can do. Embodiment 3.

Next, FIG. 5 is a plan view showing a weighing device for an elevator according to Embodiment 3 of the present invention. In the first embodiment, as shown in FIG. 3, the cage-side cleats 11 corresponding to the even (eight) main ropes 4 are arranged in two rows of four each. On the other hand, in the third embodiment, the car-side cleats 11 corresponding to the odd (seven) main ropes 4 are arranged in two rows, so that one row has four and the other has In the row, three main ropes 4 are arranged.

Accordingly, at the end of the other row on the side of the rotating shaft 23, there is an empty rope stop through hole 25a in which the car-side rope stopper 11 is not arranged. As a result, the arrangement density of the cage-side cleats 11 with respect to the cleat through-holes 25 a is higher on the side farther from the rotating shaft 23 than on the side closer to the rotating shaft 23. . In addition, the empty gutter through hole 25a in which the car side gutter 11 is not arranged is closed by a disk-shaped lid 34 as a closing member. Here, the case where many are arranged far from the rotation axis 23 and the case where the car-side The amount of load acting on the weighing spring 26 is calculated for the case where a large number is arranged on the side close to the dynamic shaft 23.

L1, L2 = Ll + a, L3 = L1 + 2Xa, L4 = Ll + 3xa Let L 5 = L 1 + b be the distance to the spring 26, and let P be the tension generated at the car side of one main rope 4.

As shown in FIG. 5, when the rope stop through hole 34 at a distance L 1 close to the rotation shaft 23 is vacant, that is, when many main ropes 4 are arranged on the side far from the rotation shaft 23, The load R 1 of 26 is

R 1 = (PL 1 + 2 PL 2 + 2 PL 3 + 2 PL4) / L 5

= (7 L 1 + 1 2a) P / (L 1 + b)

It becomes.

On the other hand, although not shown, if the rope stop through hole 34 at a distance L4 far from the rotation shaft 23 is left empty, the load R2 of the weighing spring 26

R 2 = (2 PL 1 + 2 PL 2 + 2PL 3 + PL4) / L 5

= (7 L 1 + 9 a) P / (L 1 + b)

It becomes.

Therefore, R 1 is larger than R 2 (R 1> R 2), and the tie spring through hole 34 at a distance L 1 closer to the rotation axis 23 has a larger expansion / contraction of the weighing spring 26. growing. For this reason, by increasing the arrangement density of the car-side cleats 11 farther from the rotation shaft 23 than the placement density of the car-side cleats 11 closer to the rotation shaft 23, the rotation support base The amount of rotation of 24 is increased, and detection accuracy can be improved.

Also, if the empty gutter through hole 25a is closed in advance with a disc-shaped lid 34 before shipment from the factory, the car side gutter 11 will not be misplaced during installation, Installation workability can be improved. Although the lid 34 is shown as the closing member in the third embodiment, the closing member may be an adhesive tape or the like.

Further, the present invention can be applied to a machine room-less elevator without a machine room. In this case, the main cable receiving portion is a member such as a beam fixed to an upper portion in the hoistway. Further, in the above-described example, the case of the elevator of the 2: 1 one-buffing method is shown, but the roving method is not particularly limited. For example, the present invention can be applied to a 1: 1 roving type elevator. 1: In the one-bout one-bing elevator, the car-side end of the main rope is connected to the upper beam of the car frame. That is, the main cable receiving part is the upper beam. Therefore, the weighing device is mounted on the upper beam in an upside-down state in the first to third embodiments.

Claims

The scope of the claims

1. Provided between a plurality of cleats connected to the ends of the plurality of main ropes and a main rope receiving portion receiving tension acting on the ends of the main ropes, and reducing the load of the car from the tension. A weighing device for detecting an elevator,

A rotation support base rotatably provided on the main cable receiving portion, supporting the total of the tensions, and being rotated according to the magnitude of the total of the tensions;

An elastic member that is provided between the rotation support base and the main rope receiving portion and that expands and contracts in accordance with the total of the tensions;

Detector that outputs a signal according to the rotation position of the rotation support base

Elevator balance device equipped with

2. The object to be detected is fixed to the rotation support base, and the detector is a non-contact type for detecting the distance to the object to be detected without contacting the object to be detected. The weighing device according to claim 1.

3. The rotation support base is provided with a plurality of cleat through-holes through which the cleat is penetrated, and the number of the cleats is smaller than the number of the cleat through-holes. 2. The element according to claim 1, wherein an arrangement density of the cleats with respect to the cleat through-holes is higher on a side farther from the rotation axis of the rotation support base than on a side closer to the rotation axis. A night balance device.

4. The weighing device according to claim 3, further comprising a closing member for closing the vacant cleat through hole.