WO2007023550A1

WO2007023550A1 - Elevator device

Info

Publication number: WO2007023550A1
Application number: PCT/JP2005/015434
Authority: WO
Inventors: Takaharu Ueda
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-08-25
Filing date: 2005-08-25
Publication date: 2007-03-01
Also published as: JP5026073B2; EP1918239A1; CN101044081A; JPWO2007023550A1; EP1918239A4; EP1918239B1; CN101044081B

Abstract

An elevator device in which an elevator car is lifted and lowered by drive force of drive devices. Each of the drive devices has a drive sheave, a motor for rotating the drive sheave, and a brake device for braking rotation of the drive sheave. The brake device has brake bodies belonging to different groups. In emergency braking, the brake device causes the brake bodies to generate force for each group at a different timing.

Description

Specification

Elevator equipment

Technical field

The present invention relates to an elevator apparatus that raises and lowers a car by the driving force of a plurality of driving apparatuses.

Background art

[0002] In a conventional elevator apparatus, a car is raised and lowered by first and second driving devices provided at the upper part of a hoistway. The forceps are provided with sensors for detecting the inclination of the force. During the travel of the force, the first and second drive devices are controlled so as to cancel the inclination of the force according to the signal of the sensor force (see, for example, Patent Document 1).

[0003] Patent Literature l: WO2004Z026749Al

Disclosure of the invention

Problems to be solved by the invention

[0004] In the conventional elevator apparatus as described above, when the braking timings of the brake devices of the first and second drive units are shifted during emergency braking, the car is inclined, causing discomfort to passengers in the car. There was a fear.

[0005] The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an elevator apparatus that can suppress the inclination of the car during emergency braking.

Means for solving the problem

[0006] An elevator apparatus according to the present invention includes a plurality of driving devices, a car that is raised and lowered by the driving force of the driving device, and a plurality of braking devices that brake the lifting and lowering of the force, and each braking device includes a plurality of different braking devices. It has multiple brake bodies that belong to a group, and during emergency braking, the brake device generates brake force by shifting the timing for each group.

Brief Description of Drawings

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. 2 is a circuit diagram showing a drive circuit for the first to sixth electromagnetic coils in FIG. 1. FIG.

FIG. 3 is an explanatory diagram showing a difference in operation of the brake body due to a difference in electrical resistance value of the resistor in FIG. 2.

FIG. 4 is a circuit diagram showing a drive circuit for first to sixth electromagnetic coils of an elevator apparatus according to Embodiment 2 of the present invention.

5 is a block diagram showing a control unit that controls the first to sixth selection switches in FIG. 4. FIG.

FIG. 6 is a block diagram showing a control unit that controls first to sixth selection switches of an elevator apparatus according to Embodiment 3 of the present invention.

FIG. 7 is a circuit diagram showing a drive circuit for first to sixth electromagnetic coils of an elevator apparatus according to Embodiment 4 of the present invention.

8 is an explanatory diagram showing a difference in the contact opening operation of the electromagnetic switch device due to a difference in electrical resistance value of the resistor in FIG.

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 apparatus according to Embodiment 1 of the present invention. In the figure, first and second drive units (lifting machines) 1 and 2 are installed at the upper part of the hoistway. The first drive device 1 is a first drive sheave 3, a first motor 4 that rotates the first drive sheave 3, and a brake rotating body that is rotated integrally with the first drive sheave 3. 1 brake drum 5 and a first brake device 6 for braking the rotation of the first brake drum 5 are provided.

The second drive device 2 includes a second drive sheave 7, a second motor 8 that rotates the second drive sheave 7, and a brake rotating body that rotates together with the second drive sheave 7. A second brake drum 9 and a second brake device 10 that brakes the rotation of the second brake drum 9.

[0010] A plurality of (only one is shown in the figure) first main ropes 11 are hung on the first drive sheave 3. A plurality of (only one is shown in the figure) second main ropes 12 are wound around the second drive sheave 7. A force 13 is connected to the first ends of the first and second main ropes 11 and 12. A first counterweight 14 is connected to the second end of the first main rope 11. A second counterweight 15 is connected to the second end of the second main port group 12. That is, the force 13 and the first and second counterweights 14 and 15 are suspended in the hoistway by the first and second main ropes 11 and 12 in a 1: 1 rolling method, and the first And the inside of the hoistway is raised and lowered by the driving force of the second driving devices 1 and 2.

[0012] The car 13 is provided with a first rope connection part 13a and a second rope connection part 13b arranged on the opposite side of the center of gravity of the car 13 from the first rope connection part 13a. And The first and second rope connecting portions 13a and 13b are arranged symmetrically about the center of gravity of the car 13 on the vertical projection plane. The first main rope 11 is connected to the first rope connecting portion 13a. The second main rope 12 is connected to the second rope connecting portion 13b.

[0013] The first brake device 6 includes first to third brake bodies 16a to 16c belonging to a plurality of different groups (here, first to third groups). The second brake device 10 includes fourth and sixth brake bodies 16d to 16f belonging to a plurality of different groups (here, first to third groups)! /.

[0014] Specifically, the first and fourth brake bodies 16a, 16d belong to the first group, the second and fifth brake bodies 16b, 16e belong to the second group, and the third and fourth brake bodies 16a, 16d belong to the first group. Six brake bodies 16c and 16f belong to the third group.

[0015] The first brake body 16a presses the first brake shoe 17a, which is in contact with and separated from the braking surface of the first brake drum 5, and the first brake shoe 17a against the first brake drum 5. 1 brake spring (mechanical spring) 18a, a first iron core 19a fixed to the first brake shoe 17a, and a first brake shoe 17a to the first brake core 17a by sucking the first iron core 19a And a first electromagnetic coil 20a that is separated from the brake drum 5.

[0016] Like the first brake body 16a, the second to sixth brake bodies 16b to 16f are brakes 17b to 17f, brake springs 18b to 18f, iron cores 19b to 19f, and electromagnetic coils 20b to 20f. have.

FIG. 2 is a circuit diagram showing a drive circuit for the first to sixth electromagnetic coils 20a to 20f in FIG. The first to sixth brake suction amplifiers 21a to 21f are connected to the electromagnetic coils 20a to 20f. Current is supplied via the electromagnetic switch device 22.

[0018] The electromagnetic switch device 22 includes first to sixth contacts 22a to 22f connected between the brake suction amplifiers 21a to 21f and the electromagnetic coils 20a to 20f, and an open / close for opening and closing the contacts 22a to 22f. Drive unit 22g. The opening / closing drive unit 22g includes an iron core 22h, a switch coil 22i wound around the iron core 22h, and a resistor 22j and a diode 22k connected in parallel to the switch coil 22i!

[0019] The contacts 22a to 22f are normally closed. However, when an emergency stop command signal is input to the opening / closing drive unit 22g, the contacts 22a to 22f are opened. Thereby, the current supplied to the electromagnetic coils 20a to 20f of the brake bodies 16a to 16f is simultaneously cut off.

[0020] Corresponding first to sixth resistors 23a to 23f and corresponding first to sixth diodes 24a to 24f are connected in parallel to the first to sixth electromagnetic coils 20a to 20f. ing . The diodes 24a to 24f are connected in series with the corresponding resistors 23a to 23f.

Here, the electric resistance values of the resistors 23a to 23f connected to the electromagnetic coils 20a to 20f belonging to the same group are set to be the same. Specifically, the electric resistance value R1 of the first resistor 23a is the same as the electric resistance value R4 of the fourth resistor 23d (R1 = R4), and the electric resistance value R2 of the second resistor 23b. Is the same as the electric resistance value R5 of the fifth resistor 23e (R2 = R5), and the electric resistance value R3 of the third resistor 23c is the same as the electric resistance value R6 of the sixth resistor 23f ( R3 = R6).

[0022] The electrical resistance values of the resistors 23a to 23f connected to the electromagnetic coils 20a to 20f belonging to different groups are different from each other. Specifically, the electric resistance value R1 of the first resistor 23a is larger than the electric resistance value R2 of the second resistor 23b (Rl> R2), and the electric resistance value R2 of the second resistor 23b is The electric resistance value R3 of the third resistor 23c is larger (R2> R3).

Next, the operation will be described. During normal operation, the first and second motors 4 and 8 are driven in synchronization to rotate the first and second drive sheaves 3 and 7 simultaneously, and the car 13 and the counterweights 14 and 15 are raised and lowered. Elevated in the road. While the force 13 is running, the brake actuators 17a to 17f are separated from the brake drums 5 and 9 against the brake springs 18a to 18f by the electromagnetic actuator comprising the iron cores 19a to 19f and the electromagnetic coils 20a to 20f. The

[0024] Further, while the car 13 is stopped, the electromagnetic coils 20a to 20f are de-energized, and the brake is The brake shoes 17a to 17f are pressed against the brake drums 5 and 9 by the spring force of the screws 18a to 18f, and the stationary state of the force 13 is maintained.

[0025] Further, when the car 13 is emergency stopped while the car 13 is running, the energization to the motors 4 and 8 is cut off, and an emergency stop command signal is input to the open / close drive unit 22g, and the contacts 22a to 2 2f Are released at the same time. As a result, energization of the electromagnetic coils 20a to 20f is forcibly cut off, and the brake shoes 17a to 17f are pressed against the brake drums 5 and 9 by the spring force of the brake springs 18a to 18f. As a result, friction force is generated between the brake shoes 17a to 17f and the brake drums 5 and 9, and the rotation of the brake drums 5 and 9 and the drive sheaves 3 and 7 is stopped, and the car 13 is suddenly stopped. .

[0026] At this time, since the electrical resistance values of the resistors 23a to 23f connected in parallel to the electromagnetic coils 20a to 20f are set as described above, the timing at which the brake bodies 16a to 16f generate the braking force is Each group will shift slightly. That is, the group of the brake bodies 16a to 16f is a brake operation timing group.

[0027] Here, FIG. 3 is an explanatory diagram showing a difference in operation of the brake bodies 16a to 16f due to a difference in electrical resistance values of the resistors 23a to 23f in FIG. When the electrical resistance value of the resistors 23a to 23f is increased, the time until the current flowing through the electromagnetic coils 20a to 20f becomes zero after the energization of the electromagnetic coils 20a to 2 Of is interrupted by the emergency stop command Shorter. For this reason, the shoe gap (gap between the brake shoe 17a-17f and the brake drums 5, 9) becomes zero earlier when the resistance value of the resistor 23a-23f is larger. In other words, the braking force is generated and acts at a timing earlier when the electrical resistance values of the resistors 23a to 23f are larger.

Therefore, when the electrical resistance values of the resistors 23a to 23f are set as described above, the first and fourth brake bodies 16a, 16d, the second and fifth brake bodies 16b, 16e, the third and Brake force is generated in the order of the sixth brake body 16c, 16f.

[0029] In such an elevator device, the brake force generation timing by the brake bodies 16a to 16f is shifted for each group during emergency braking, so that excessive deceleration is applied to the force 13. Can be prevented. In addition, since the braking force is divided into multiple times for the first and second brake drums 5 and 9, even if a slight deviation occurs in the left and right brake timing, Will be small. For this reason, during emergency braking It is possible to suppress the inclination of the basket 13.

[0030] Embodiment 2.

Next, FIG. 4 is a circuit diagram showing a drive circuit for the first to sixth electromagnetic coils 20a to 20f of the elevator apparatus according to Embodiment 2 of the present invention, and the configuration of the entire elevator apparatus is that of Embodiment 1 ( The same as Fig. 1). In the figure, two first resistors 23al and 23a2 are provided in a circuit parallel to the first electromagnetic coil 20a. The first resistors 23al and 23a2 are connected in parallel to each other and are connected in series to the first diode 24a.

[0031] Between the first diode 24a and the first resistor 23al, 23a2, a first resistor selectively connecting one of the first resistor 23al, 23a2 to the first diode 24a Select switch 25a is connected. Similarly to the first electromagnetic coil 20a, the second to sixth electromagnetic coils 20b to 20f are connected to the second to sixth resistors 23bl to 23f2 and the second to sixth selection switches 25b to 25f. And

[0032] The electric resistance value of the first resistor 23al is set to be slightly larger than the electric resistance value of the first resistor 23a2. The electric resistance value of the second resistor 23bl is set slightly larger than the electric resistance value of the second resistor 23b2. The electric resistance value of the third resistor 23cl is set to be slightly larger than the electric resistance value of the third resistor 23c2. The electric resistance value of the fourth resistor 23dl is set slightly larger than the electric resistance value of the fourth resistor 23d2. The electric resistance value of the fifth resistor 23el is set to be slightly larger than the electric resistance value of the fifth resistor 23e2. The electric resistance value of the sixth resistor 23fl is set to be slightly larger than the electric resistance value of the sixth resistor 23f2.

[0033] The electric resistance value of the first resistor 23al is equal to the electric resistance value of the fourth resistor 23dl. The electric resistance value of the first resistor 23a2 is equal to the electric resistance value of the fourth resistor 23d2. The electric resistance value of the second resistor 23bl is equal to the electric resistance value of the fifth resistor 23el. The electric resistance value of the second resistor 23b2 is equal to the electric resistance value of the fifth resistor 23e2. The electric resistance value of the third resistor 23cl is equal to the electric resistance value of the sixth resistor 23fl. The electrical resistance value of the third resistor 23c2 is equal to the electrical resistance value of the sixth resistor 23f2.

[0034] Further, the electrical resistance values of the first resistors 23al and 23a2 are the same as those of the second resistors 23bl and 23b2. Greater than electrical resistance. The electric resistance values of the second resistors 23bl and 23b2 are larger than the electric resistance values of the third resistors 23cl and 23c2.

FIG. 5 is a block diagram showing a control unit that controls the first to sixth selection switches 25a to 25f of FIG. The first and second weighing devices 26 and 27 output a signal corresponding to the load of the car 13. The first scale device 26 is provided in the first rope connection portion 13a. The second scale device 27 is provided in the second rope connection portion 13b. Specifically, the scale devices 26 and 27 output signals corresponding to the tensions of the main ropes 11 and 12 by the expansion and contraction of the built-in elastic body.

[0036] Signals from the weighing devices 26 and 27 are input to the comparison unit 28. The comparison unit 28 detects an unbalance between the tension of the first main rope 11 and the tension of the second main rope 12 by comparing the signals from the scale devices 26 and 27. The command generation unit 29 generates a command signal for operating the selection switches 25a to 25f in accordance with the unbalance detection result in the comparison unit 28.

[0037] The command generation unit 29 selects the switch 25a so as to shift the brake force generation timing of the brake bodies 16a to 16f in the same group according to the tension difference between the first and second main ropes 11 and 12. Change operation up to 25f. For example, when the tension of the first main rope 11 is larger than the tension of the second main rope 12, the first to third resistors 23al, 23bl, 23cl and the fourth or sixth resistor 23d2, Select 23e2 and 23f.

[0038] Thereby, in the first group, the fourth brake body 16d generates a braking force slightly earlier than the first brake body 16a. In the second group, the fifth brake body 16e generates a braking force slightly earlier than the second brake body 16b. Furthermore, in the third group, the sixth brake body 16f generates the brake force slightly before the third brake body 16c.

[0039] Even if the comparison unit 28 and the command generation unit 29 are configured by a computer that performs arithmetic processing on the signals from the weighing devices 26 and 27 converted into digital signals, the analog signals from the weighing devices 26 and 27 are used as they are. You may comprise by the analog circuit to be used.

[0040] In such an elevator apparatus, the timing of generating the braking force of the brake bodies 16a to 16f in the same group is shifted so as to cancel the tension difference between the first and second main ropes 11 and 12 during emergency braking. Therefore, it is possible to more effectively suppress the inclination of the car 13 during emergency braking. [0041] Embodiment 3.

Next, FIG. 6 is a block diagram showing a control unit for controlling the first to sixth selection switches 25a to 25f of the elevator apparatus according to Embodiment 3 of the present invention. In this example, instead of the weighing devices 2 6 and 27, a command for switching the selection switches 25a to 25f according to the signal from the car tilt sensor 30 that outputs a signal according to the tilt of the car 13 is generated by the command generating unit. 31 generates. The command generator 31 outputs a command signal to the selection switches 25a to 25f so as to cancel the inclination of the force 13 by shifting the brake force generation timing of the brake bodies 16a to 16f in the same group.

[0042] For example, when the car 13 is tilted in the direction in which the second rope connecting portion 13b is lowered than the first rope connecting portion 13a, the braking force of the fourth brake body 16d is applied to the first brake. The brake force of the fifth brake body 16e is generated slightly earlier than the second brake body 16b, and the brake force of the sixth brake body 16f is generated slightly before the body 16a. It is generated slightly before the main body 16c. Other configurations are the same as those in the second embodiment.

[0043] In such an elevator apparatus, the brake force generation timing of the brake bodies 16a to 16f in the same group is shifted so as to cancel the inclination of the car 13 during emergency braking. It is possible to more effectively suppress the occurrence of tilt.

[0044] Embodiment 4.

Next, FIG. 7 is a circuit diagram showing a drive circuit for the first to sixth electromagnetic coils 20a to 20f of the elevator apparatus according to Embodiment 4 of the present invention. The overall configuration of the elevator apparatus is that of Embodiment 1 ( The same as Fig. 1). The first and fourth electromagnetic coils 20a and 20d belonging to the first group are supplied with the current from the first and fourth brake suction amplifiers 21a and 21d via the first electromagnetic switch device 32. .

[0045] The first electromagnetic switch device 32 includes contacts 22a, 22d connected between the brake suction amplifiers 21a, 21d and the electromagnetic coils 20a, 20d, and a first for opening and closing the contacts 22a, 22d. And an open / close drive unit 32a. The first opening / closing drive unit 32a is connected in parallel to the first iron core 32b, the first switch coil 32c wound around the first iron core 32b, and the first switch coil 32c. The first resistor 32d and the first diode 32e are connected to each other.

[0046] The second and fifth electromagnetic coils 20b and 20e belonging to the second group are supplied with the current from the second and fifth brake suction amplifiers 21b and 21e via the second electromagnetic switch device 33. Is done. The second electromagnetic switch device 33 has contacts 22b and 22e and a second opening / closing drive unit 33a. The second opening / closing drive unit 33a includes a second iron core 33b, a second switch coil 33c, a second resistor 33d, and a second diode 33e.

[0047] The third and sixth electromagnetic coils 20c, 20f belonging to the third group receive current from the third and sixth brake suction arches I amplifiers 2lc, 2 If from the third electromagnetic switch device 34. Supplied via The third electromagnetic switch device 34 has contacts 22c, 22f and a third opening / closing drive unit 34a. The third opening / closing drive unit 34a includes a third iron core 34b, a third switch coil 34c, a third resistor 34d, and a third diode 34e.

[0048] The contacts 22a to 22f are normally closed. However, when an emergency stop command signal is input to the open / close drive units 32 to 34, the contacts 22a to 22f are opened. Thereby, the current supplied to the electromagnetic coils 20a to 20f of the brake bodies 16a to 16f is cut off.

[0049] The electrical resistance values of the resistors 32d, 33d, 34d belonging to different groups are different from each other. Specifically, the electric resistance value of the first resistor 32d is larger than the electric resistance value of the second resistor 33d. The electric resistance value of the second resistor 33d is equal to the electric resistance value of the third resistor 34d. Greater than the resistance value.

Here, FIG. 8 is an explanatory view showing a difference in the contact opening operation of the electromagnetic switch devices 32 to 34 due to a difference in electric resistance values of the resistors 32d, 33d, and 34d in FIG. When the emergency stop command signal is input to the open / close drive units 32a, 33a, 34a and the force (after the voltage of the command signal becomes 0), the time until the contacts 22a-22f are actually opened is the resistor 32d, Increasing the electrical resistance of 33d and 34d shortens the value.

[0052] In such an elevator apparatus, during emergency braking, the brake force generation timing by the brake bodies 16a to 16f is shifted from group to group, so excessive deceleration to the force 13 is caused. It is possible to prevent the degree from becoming excessive. Further, since the braking force is applied to the first and second brake drums 5 and 9 in a plurality of times, the car 13 can be prevented from being inclined during emergency braking.

[0053] In the above example, two brake bodies or four or more brake bodies may be provided in one brake device in which one brake device is provided with three brake bodies.

Moreover, in the above example, the force that all brake bodies provided in one brake device belong to different groups You may have multiple brake bodies belonging to the same group! ,. For example, if four brake bodies are installed in one brake device, you can divide the four brake bodies into two groups of two!

[0054] Further, in the above example, the force using two drive units may be three or more.

Furthermore, in the above example, one force or two or more forces using two counterweights may be used.

In the above example, the brake operation start timing is shifted for each group of brake bodies 16a to 16f. However, the brake bodies are divided into a plurality of groups, and the intermittent or continuous control method of the brake force is set for each group. May be different.

Furthermore, in the above example, the brake device that brakes the rotation of the drive sheave has been described, but the present invention can also be applied to a brake device that brakes the raising and lowering of the car by other methods. For example, it may be a plurality of car brake devices that are mounted on a force and brake the lifting and lowering of the force by bringing a braking member into pressure contact with the car guide rail. In this case, each car brake device is provided with a plurality of brake bodies belonging to different groups. Also, it may be a plurality of rope brake devices that are provided on a hoistway or a support member that supports the driving device and brake the lifting of the car by braking the movement of the main rope! /. Also in this case, each rope brake device is provided with a plurality of brake bodies belonging to a plurality of different groups.

Claims

The scope of the claims

[1] multiple drive units,

A car that is raised and lowered by the driving force of the driving device, and

A plurality of brake devices for braking the lifting and lowering of the force

With

Each brake device has a plurality of brake bodies belonging to different groups,

During emergency braking, the brake device is an elevator device that generates a braking force by the brake body with the timing shifted for each group.

[2] Each of the drive devices has a drive sheave, a motor that rotates the drive sheave, and the brake device that brakes rotation of the drive sheave.

The elevator apparatus according to claim 1, wherein the car is suspended by a plurality of main ropes wound around the drive sheave.

[3] The car has a first rope connection part and a second rope connection part arranged on the opposite side of the first rope connection part with respect to the center of gravity of the car,

The main rope includes a first main rope connected to the first rope connection portion, and a second main rope connected to the second rope connection portion,

The brake device detects a tension difference between the first and second main ropes, and shifts a braking force generation timing of the brake bodies in the same group according to the tension difference during emergency braking. The elevator apparatus according to 2.

4. The elevator apparatus according to claim 1, wherein the brake apparatus detects the inclination of the car and shifts the brake force generation timing of the brake bodies in the same group according to the inclination of the car.

[5] Each brake body includes a brake shoe that is brought into contact with and separated from a brake rotating body that rotates integrally with the drive sheave, a brake spring that presses the brake shoe against the brake rotating body, and a pile on the brake spring. And an electromagnetic coil for generating an electromagnetic force for separating the brake shoe from the brake rotating body, and a resistor connected in parallel to the electromagnetic coil, The elevator apparatus according to claim 2, wherein an electric resistance value of the resistor is different for each of the groups.

[6] Each of the brake bodies includes a brake shoe that is brought into contact with and separated from a brake rotating body that rotates integrally with the drive sheave, a brake spring that presses the brake shoe against the brake rotating body, and a pile on the brake spring. And an electromagnetic coil for generating an electromagnetic force for separating the brake shoe from the brake rotating body,

3. The elevator apparatus according to claim 2, wherein energization of the electromagnetic coil is interrupted at a timing different for each group during emergency braking.

[7] A plurality of electromagnetic switch devices for switching between energization and interruption of the current to the electromagnetic coil,

Each of the electromagnetic switch devices has a contact connected to the electromagnetic coil, a switch coil for opening and closing the contact, and a resistor connected in parallel to the switch coil, and the electrical resistance value of the resistor is The elevator apparatus according to claim 6, wherein the group is different for each group.