JP2003327369A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device whose emergency stopping part is not actuated unnecessarily as long as a braking part functions normally. <P>SOLUTION: The elevator device 10 has a running speed pattern preparing part to prepare a running speed pattern for an elevator car 18 from the starting story to the arriving story, a first over-speed sensing level preparing part to prepare the first over-speed sensing level obtained by adding the first over-speed to the speed defined by the running speed pattern, and a second over-speed sensing level preparing part to prepare the second over-speed sensing level obtained by adding the second over-speed higher than the first over-speed to the speed defined by the running speed pattern. The second over-speed sensing level is decided so that the running speed of the car after being braked does not exceed the second over-speed sensing level as long as the braking part 32 works normally. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an elevator apparatus.

[0002]

2. Description of the Related Art Normally, in an elevator system, the traveling speed (ascending speed, descending speed) of a car exceeds a rated speed and reaches a first reference speed (for example, 1.3 times the rated speed). A safety device that sometimes brakes the car, or a second reference speed (for example, when the traveling speed of the car exceeds the first reference speed)
Another safety device is provided to force the car to stop when the speed reaches 1.4 times the rated speed).

[0003]

Among these safety devices, the safety device that operates when the traveling speed of the car exceeds the first reference speed is the braking force applied to the drive system (eg, hoisting machine) of the car. It is relatively easy to release the safety device once it has been activated, because it is a configuration in which only the. In contrast,
The safety device that operates when the traveling speed of the car exceeds the second reference speed is to forcibly stop the car by driving a wedge or the like between the car and the rail that guides the car. , It is not easy to release the safety device once activated and return to the steady state.

Therefore, according to the present invention, the traveling speed of the car is the first.
It is an object of the present invention to provide an elevator apparatus in which the second safety device does not inadvertently operate as long as the first safety device is functioning normally even when the reference speed is exceeded.

[0005]

In order to achieve this object, an elevator apparatus according to the present invention comprises a running speed pattern creating section for creating a running speed pattern of a car from a departure floor to an arrival floor, and the above running speed. A first overspeed detection level creating unit for creating a first overspeed detection level by adding a first overspeed difference to the speed defined by the pattern; and the first overspeed detection level for the speed defined by the traveling speed pattern. A second overspeed detection level creation unit that creates a second overspeed detection level to which a second overspeed difference larger than the overspeed difference is added; and a speed detection unit that detects the traveling speed of the car. A first braking stop portion that operates when the traveling speed of the car exceeds a first overspeed detection level to brake or stop the traveling speed of the car by means such as a brake, and the traveling speed of the car Is the second overspeed detection A second braking stop portion which is activated when the speed of the car is exceeded and brakes or stops the speed of the car by means such as an emergency stop, and the second overspeed detection level is the first braking speed. It is characterized in that the traveling speed of the car after the braking operation is started does not exceed the second overspeed detection level when the stop portion operates normally. Elevator equipment.

An elevator apparatus according to another aspect of the present invention is characterized in that the overspeed of the second overspeed detection level is determined based on the following equation.

In an elevator apparatus according to another aspect of the present invention, the resolution of the traveling speed detecting unit is the first overspeed detection level and the second overspeed detection level.
It is characterized by being smaller than the difference from the overspeed detection level of.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1. FIG. 1 shows an elevator apparatus 1
It is a figure which shows the structure of 0 typically. As shown in this figure, for example, in a hoistway 14 formed in a building 12, a guide rail 16 extending in the vertical direction along the hoistway 14 is provided.
And, a car 18 that moves up and down along the guide rail 16 is installed. A hoisting machine 20 is installed above the hoistway 14 as a drive device for the car 18. This hoisting machine 20 includes a rotary drum 22, a motor 24 for rotating the rotary drum 22, a rotational speed of the rotary drum 22, or a motor 2.
A speed detector 26 for detecting the traveling speed of the car 18 from the number of rotations of 4 is provided. A wire 28 is wound around the rotary drum 22, one end of the wire 28 is connected to the car 18, and the other end is connected to the counterweight 30. The rotation of the rotary drum 22 based on the drive of the motor 24 is performed. Accordingly, the car 18 and the counterweight 30 are moved to the hoistway 14
Is moved up and down in the opposite direction. The hoisting machine 20 also includes a braking unit 32 as a first safety device so that braking force can be applied to the rotating drum 22 to reduce the ascending / descending speed of the car 18 or stop the car 18 when necessary. I am doing it.

The control unit 34 for controlling the operation of the car 18 is electrically connected to the motor 24 and the braking unit 32 of the hoisting machine 20, and the motor 2 is operated based on a command from the control unit 34.
4 and the braking portion 32 are operated. Control unit 34
Is electrically connected to an emergency stop unit 36 which is a second safety device installed in the car 18. This emergency stop 3
6 includes, for example, a fixed portion fixed to the car 18 so as to sandwich the guide rail 16 and a wedge that can be driven into a gap between the fixed portion and the guide rail 16, and a command from the control unit 34 is given. Based on this, by driving the wedge into the gap between the fixed portion and the guide rail 16, the car 18 is forcibly braked or stopped.

The control unit 34 is also electrically connected to a destination designating button (switch) 38 provided inside the car 18 and a call button (switch) 40 provided at each stop floor. It is configured to notify the control unit 34 of the arrival floor designated by 38 and 40.

In addition, in the lower pit 42 of the hoistway 14, even when the descending car 18 enters the lower pit 42 without stopping at the lowest floor, the impact force acting on the car 18 is minimized. In order to stop, a buffer 44 is installed as a third safety device.

The elevator apparatus 1 having such a structure
0, the control unit 34 is newly provided with a speed control function described below. The processing of this speed control function is shown in FIG. As shown in the figure, first, when the arrival floor (destination floor) is designated by the button 38 or 40 while the car 18 is stopped, the control unit 34 normally sets the operation speed plan from the departure floor to the arrival floor. A running speed pattern L0 is created [step S1: running speed pattern creating unit].

As shown in FIG. 3, the normal traveling speed pattern L0 shows a change in the car speed from the departure floor to the arrival floor, and is an acceleration area on the departure floor from the point of departure to a place moved by a predetermined distance. P1 and a rated speed traveling area P2 following the departure floor acceleration area P1 and an arrival floor deceleration area P3 from a location that is a predetermined distance before the arrival floor to the arrival floor.

Returning to FIG. 2, the control unit 34 also creates a first overspeed detection level L1 and a second overspeed detection level L2 (step S2: first overspeed detection level creation unit, and (Step S3: Second overspeed detection level creation unit). These first and second overspeed detection levels L1 and L
2 and the above-mentioned normal traveling speed pattern L0 may be calculated at the time when the information of the departure floor and the arrival floor is input, or the normal traveling speed pattern and the overspeed detection depending on the floor difference between the departure floor and the arrival floor. The level is stored in advance in the storage unit of the control device,
When the information on the departure floor and the arrival floor is obtained, the information may be retrieved from the storage unit based on the information.

The first overspeed detection level L1 defined here defines the speed (trigger) for activating the braking portion 32 which is the first safety device, and the second overspeed detection level L2.
Defines the speed (trigger) for activating the emergency stop unit 36 which is the second safety device. Further, as shown in FIG. 3, the overspeed V ₁ (t) defined by the first overspeed detection level L1 is the speed defined by the normal traveling speed pattern L0 at the same time (t) [the traveling speed V ₀ (t))
Is a value obtained by adding a predetermined value (first overspeed difference ΔV ₁ ]. The first overspeed difference ΔV ₁ is the traveling speed V
_It may be a value obtained by multiplying ₀ (t) by a predetermined coefficient (for example, 0.3), or is defined by a function F [V ₀ (t)] that includes the traveling speed traveling speed V ₀ (t) as a variable. It may be one that is done. On the other hand, the overspeed V ₂ (t) of the _second overspeed detection level L2 is larger than the overspeed V ₁ (t) defined by the first overspeed detection level L1 at the same time, and is determined by the method described later. Is defined.

Specifically, the overspeed V ₂ (t + Δt) of the second overspeed detection level L2 is calculated based on the following equation 1.

Here, the expected acceleration α may be a constant value obtained from experiments or experience, or a value defined by using the normal traveling speed pattern L0 or the first overspeed detection level L1. It may be. Similarly, the margin value Δv may be a constant value obtained from experiments or experience, or may be the normal traveling speed pattern L0 or the first overspeed detection level L.
It may be a value defined using 1. Therefore,
The second overspeed V ₂ (t + Δt) defined by the second overspeed detection level L2 thus defined is the same time (t
+ Δt) to the traveling speed V ₀ (t + Δt) defined by the normal traveling speed pattern L0, the second overspeed difference [V ₂ (t
+ Δt) -V ₀ (t + Δt)] or the same time
In addition to the traveling speed V ₁ (t + Δt) defined by the first overspeed detection level L1 at (t + Δt), another second overspeed difference [V ₂ (t + Δt) −V ₁ (t + Δ) t)] can be considered.

According to the speed control function thus configured, the traveling speed V of the car 18 at a certain time (t) as shown in the flowchart of FIG. 4 and the graph of FIG. 5, for example.
Based on the output of the speed detector 26, the control unit 34 detects whether ₀ (t) exceeds the overspeed V ₁ (t) defined by the first overspeed detection level L1 (step S11). ).
As a result of the detection, if the traveling speed V ₀ (t) is less than or equal to the overspeed V ₁ (t), the braking unit 34 does not operate (step S1).
3). On the other hand, when the traveling speed V ₀ (t) exceeds the overspeed V ₁ (t), the control unit 34 operates the braking unit 32 to apply braking to the traveling of the car 18 (step S12). At this time, it takes a predetermined delay time (Δt) from when the braking force acts on the rotary drum 22 to when the speeds of the rotary drum 22 and the car 18 actually start decelerating. The deceleration of the rotating drum 22 and the car 18 starts. However, as described above, the second overspeed detection level L2 has the delay time (Δt), the acceleration α when the traveling speed exceeds the first overspeed detection level L1, and a predetermined margin. Since the value is defined using the value (ΔV), as long as the braking portion 32 is operating normally, the braking portion 32 is not likely to operate as long as the emergency stop portion 36, which is the second safety device, is not activated.
Thereby, the traveling speed of the car 18 can be reduced.

However, when the braking unit 32 does not function normally and the traveling speed of the car 18 cannot be controlled to be equal to or lower than the second overspeed level, the traveling speed of the car 18 exceeds the second overspeed detection level L2. At this point, the emergency stop 36, which is the second safety device, is activated to forcibly stop the car 18.

As described above, according to the elevator apparatus 10 of the present invention, the second overspeed detection level L2 at which the emergency stop portion 36 operates takes into consideration the state when the braking portion 32 functions normally. Since it is determined, the emergency stop portion 36 does not operate unnecessarily. Therefore, maintenance of the elevator apparatus 10 becomes easy.

In the starting floor acceleration area P1 and the arrival floor deceleration area P3, the overspeed V ₁ (t), defined by the first overspeed detection level L1 and the second overspeed detection level L2,
The value of V ₂ (t) is overspeed _V 1 (t) at the rated speed running region _P2, is set lower than the value of _V 2 (t), overspeed running speed such low basket 18 When the car 18 accidentally rushes into the pit 42, the shock absorbing portion 44 absorbs the impact force of the car 18 so that the car 18 can be safely operated.
Can be stopped. In other words, the buffer stroke in the buffer portion 44 can be made smaller than the buffer stroke in the conventional buffer portion, and the volume occupied by the buffer portion 44 and further the volume occupied by the lower pit 42 can be reduced.

By the way, in the above description, the braking portion 32 of the hoisting machine 20 is used as the braking portion, but the braking portion that applies the braking force to the car 18 by utilizing the frictional force with the guide rail 16 is used for the car 18. If it is provided, this braking unit may be used.

Further, the emergency stop portion 36 is not limited to the above-mentioned form, and any emergency stop portion may be used as long as it can forcibly stop the car 18.

Further, the traveling speed of the car 18 is detected from the rotation of the rotary drum 22 or the rotation of the motor 24, but the traveling speed of the car can be calculated from the rotational speed at which the rollers provided in the car 18 rotate by contact with the guide rollers. You can detect it,
A signal (for example, a millimeter wave) transmitted from an oscillator provided above or below the car 18 or the hoistway 14 may be detected and detected by a receiver provided at the same or another place.

Furthermore, as shown in FIG. 6, normal running
Speed pattern L0 and first and second overspeed detection levels L
1 and L2 are normal traveling speed patterns at a certain time
Running speed V defined by L0₀And the first overspeed detection level
Overspeed V defined by L1 ₁Difference dV₁(= V₁-V
₀), And the first overspeed detection level L1 and the second overspeed
Speed V defined by the degree detection level L2_Two, V₁Difference d
V_Two(= V_Two-V₁) Is the resolution of the speed detection unit 26
It is desirable to set it to be larger than the above. this
As a result, as described above, the traveling speed of the car 18 becomes the first overspeed.
That the fact that the degree detection level L1 has been exceeded is surely detected
In addition, when the braking unit 32 is functioning normally, the emergency stop device 3
The risk of malfunction of 6 can be eliminated.

[0027]

As is apparent from the above description, according to the elevator apparatus of the present invention, the emergency stop portion does not operate unnecessarily in the range where the braking portion functions normally.

[Brief description of drawings]

FIG. 1 is a sectional view showing a schematic configuration of an elevator apparatus according to the present invention.

FIG. 2 is a flowchart illustrating a speed control function of a control unit.

FIG. 3 is a graph showing a normal traveling speed pattern, a first overspeed detection level, and a second overspeed detection level.

FIG. 4 is a flowchart illustrating speed control of a control unit.

FIG. 5 is a graph illustrating speed control of the control unit together with FIG.

FIG. 6 is a graph showing another mode of the normal traveling speed pattern, the first overspeed detection level, and the second overspeed detection level.

[Explanation of symbols]

10: Elevator device 18: Car 26: Speed detection part 32: Braking part 34: Control part 36: Emergency stop part 4
4: Buffer section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kei Yumura             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. (72) Inventor Tatsuo Matsuoka             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. F-term (reference) 3F002 CA04 DA08 DA09 EA10                 3F304 CA13 EA18 EB04

Claims (3)

[Claims] 1. A running speed pattern creating unit for creating a running speed pattern of a car from a departure floor to an arrival floor, and a first overspeed obtained by adding a first overspeed difference to the speed defined by the above running speed pattern. A first overspeed detection level creating unit for creating a speed detection level; and a second overspeed difference obtained by adding a second overspeed difference larger than the first overspeed difference to the speed defined by the traveling speed pattern. A second overspeed detection level creating section for creating a speed detection level, a speed detecting section for detecting the traveling speed of the car, and an operation when the traveling speed of the car exceeds the first overspeed detection level. And a first braking stop portion for braking or stopping the traveling speed of the car with a means such as a brake, and the speed of the car that operates when the traveling speed of the car exceeds a second overspeed detection level. Braking by means such as emergency stop The second overspeed detection level is such that the traveling speed of the car after the start of the braking operation is the second overspeed detection level when the first braking stop section operates normally. Not to exceed the overspeed detection level of
Elevator equipment characterized by being determined. 2. The elevator apparatus according to claim 1, wherein the overspeed of the second overspeed detection level is determined based on the following equation. 3. The resolution of the traveling speed detector is the first resolution.
The elevator apparatus according to claim 1 or 2, wherein the difference is smaller than the difference between the overspeed detection level and the second overspeed detection level.