JPH072466A - Elevator device having no main rope - Google Patents

Abstract

PURPOSE:To prevent a cage ceiling from hitting a head even when a passenger is thrown up by emergency-stopping a car of an elevator device having no main rope. CONSTITUTION:In a car 2, which is lifted by thrust between a primary coil 8 of a linear motor arranged in a lift well 1 and a permanent magnet 9 of constituting a secondary side of the linear motor set up in the car 2, a main rope and a balance weight are not used. Height of a ceiling of the car 2 is set to a distance or more, when a passenger is thrown up at an initial speed (for instance, rated speed of a car 2), and larger than height of the passenger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator device driven by a linear motor without using a main rope.

[0002]

2. Description of the Related Art Conventionally, as is well known in elevators, a car and a counterweight are arranged in a hoistway and they are connected by main ropes, which are driven by a hoisting electric motor installed in a machine room to move up and down. It is designed to let you. On the other hand, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2-261789, an elevator without a main rope, which does not use a main rope and a counterweight, has been proposed. The details of this elevator without main rope will be described later, but the car is installed by the primary coil of the linear motor installed in the hoistway and the cage by the thrust generated between the permanent magnet that constitutes the secondary side of the linear motor. Is to drive.

[0003]

Since the conventional elevator without main rope as described above does not have the main rope and the counterweight, there is a possibility that the thrust of the linear motor is lost during the ascending traveling of the car. When it occurs, the car will be 1G (9.8
Attempts to decelerate at m / S ² ). Further, since the braking device operates during such an abnormality, the car decelerates at a large deceleration of 1 G or more, which causes a phenomenon that is significantly different from that of an elevator having a counterweight.

At this time, since the deceleration applied to the passenger in the car is 1 G, the passenger jumps up from the car floor and, in the worst case, strikes the head of the car ceiling. In order to avoid this inconvenience, it is conceivable to operate the braking device after waiting for the car to stop naturally, but there is a problem that the stopping distance of the car becomes long.

Further, when the car cannot stop at the top floor due to the failure of the control device and the car collides with the top of the hoistway or the stopper, the deceleration is very large, so that the passenger jumps up from the car floor as in the above case. There is a problem that the head may hit the ceiling of the basket.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent passengers from hitting their heads on the ceiling of the car even if the passengers jump up from the car floor due to an emergency stop of the car. It is an object of the present invention to provide an elevator device without a main rope.

[0007]

The elevator device without a main rope according to the first aspect of the present invention is such that when the height of the stop of the car is raised by the passenger at a predetermined initial speed rather than the height of the passenger. , This passenger has been raised more than the distance it can be hoisted.

Further, in the elevator device without the main rope according to the second invention, the height of the ceiling of the car is more than the height of the passenger.
When a passenger is hoisted at a predetermined initial speed, the distance must be higher than the difference between the distance the passenger can hoist and the car stop distance when the car is braked by the drive control device or the braking device while the car is moving upward. is there.

Further, the elevator apparatus without a main rope according to the third aspect of the invention has a shock absorber installed on the top of the hoistway or on the car.

Further, in the elevator device without a main rope according to the fourth aspect of the present invention, a shock absorber is installed on the top of the hoistway or on the car, and the height of the car ceiling is set so that the passenger is specified more than the height of the passenger. When the passenger is hoisted at the initial speed, the distance is increased by more than the difference between the distance the passenger can hoist and the compression distance of the shock absorber.

[0011]

According to the first aspect of the present invention, when the height of the ceiling of the car is raised above the height of the passenger at the time when the passenger is hoisted at the timed initial speed, Further, in the second aspect of the invention, since the distance is set to be larger than the difference between the distance and the stopping distance of the car at the time of car braking, the jump amount of the passenger is smaller than the distance from the passenger's head to the ceiling.

Further, in the third aspect of the invention, since the shock absorber is installed on the top of the hoistway or on the car, the gift of the car when the car collides with the top of the hoistway is mitigated, and the jumping amount of passengers is increased. Will be less.

Further, in the fourth invention, according to the third invention, when the height of the ceiling of the car is hoisted at a predetermined initial speed higher than the height of the passenger, the passenger is spoiled. Since it is set higher than the distance that can be raised, the amount of jumping passengers is smaller than the distance from the passenger's head to the ceiling.

[0014]

【Example】

Example 1. 1 to 3 are views showing an embodiment of a first invention of the present invention, and FIG. 1 is a perspective view of an elevator without a main rope,
FIG. 2 is a diagram for explaining a passenger jumping phenomenon, and FIG. 3 is a diagram for explaining a passenger jumping amount calculation, and the same reference numerals indicate the same parts.

In FIG. 1, (1) is a hoistway and (2) is a hoistway.
Elevator cage located in (1), (3) floor, (4)
Are set up in the hoistway (1), guide rails are arranged on both sides of the car (2), and (5) and (6) are installed in the upper and lower parts of the car (2) respectively, and the hoistway (1) An upper roller guide and a lower roller guide for guiding the vehicle along the guide rail (4), and a braking device (7) installed at the lower part of the car (2) and arranged to face the guide rail (4).

Reference numeral (8) is a primary coil of the linear motor arranged in the hoistway (1), and coils (8A) to (8C) are separately arranged on both sides of the guide rail (4). (9) Basket (2)
A permanent magnet that constitutes the secondary side of the linear motor that is arranged on the side surface of the primary coil (8) facing the primary coil (8).
(9D) is divided. Primary coil (8) and permanent magnet
The linear synchronous motor is composed of (9). (10) Basket
Passengers in (2).

In the elevator apparatus without a main rope constructed as described above, the primary coil (8) has a variable voltage variable frequency control device (not shown; hereinafter referred to as drive control device).
Urged by. Now the primary coil (8) and the permanent magnet
Thrust is generated during (9), and the car (2) is driven and moves up and down.

Here, when the car (2) is braked by the drive control device or the braking device (7), the passenger (1
0) causes jumping. This will be described in detail with reference to FIGS. FIG. 3A is an operation waveform diagram, and FIG. 3B is a model diagram of the car (2). In the figure, F is thrust and m is a car
The mass of (2) and g are gravitational acceleration.

When the thrust F becomes zero at the time t ₀ , the car (2) decelerates at the deceleration α ₁ = g as shown by the solid line. If the car (2) is not braked, the passengers (10) in the car (2) also move in the same manner as the car (2), so that no trouble occurs. However, when the car (2) is braked, the car (2) is larger than the deceleration α ₁ by α ₂ (>
Decelerate with g). Since this deceleration rate α ₂ is greater than the gravitational acceleration g, the passenger (10) in the car (2) jumps away from the car floor. The jump amount becomes a value according to the speed of the car (2), assuming that the car (2) stops instantaneously, which is obtained from the following equation.

[0020] ^{_{h = V 0 t-gt 2}} /2 = v 0 2 / 2g here, h: jumping up amount v _0: initial velocity t: time

The jump amount h is shown below for various initial velocities v ₀ .

Therefore, the clearance between the passenger (10) and the car (2) in the ceiling (hereinafter simply referred to as the clearance d) d becomes zero due to the thrust by the linear motor while the car (2) is traveling at the rated speed. Assuming that (2) the passengers (10) jumped up h, assuming that they were stopped instantaneously by the braking device, d ≧
Set the height of the ceiling of the car (2) to be h. In reality, the car (2) cannot be stopped instantly, so that it does not hit the ceiling when the passenger (10) jumps up.

Example 2. (2nd invention) With the jump amount h of Example 1, when the clearance d is too large, you may comprise as follows. That is, the jump amount h indicates a value when the car (2) is instantaneously stopped, but in reality, the car (2) is not instantaneously stopped and is decelerated at a predetermined deceleration. At this time, when the car (2) is decelerated and stopped from the rated speed at a predetermined deceleration α ₂ , when the stop distance until the speed of the car (2) becomes zero is h ₁ , d ≧ h−
It is configured to be h ₁ .

Example 3. FIG. 4 shows the third and fourth aspects of the present invention.
FIG. 3 is a configuration diagram of an elevator without main rope showing an embodiment of the invention of FIG. In the figure, (15A) is a shock absorber installed on the top of the hoistway (1), and (15B) is a shock absorber installed on the car (2).

That is, by installing the shock absorbers (15A) (15B) on the top of the hoistway (1) or on the car (2), the car (2)
Therefore, the collision d is reduced, and the clearance d of the car (2) can be reduced. If the shock absorber (15B) is installed on the car (2), the weight of the car (2) will increase and the outer shape of the car (2) will also increase. It is easier than the shock absorber (15A) installed at the top of the road (1). Here, assuming that the stroke (compression distance) of the shock absorbers (15A) and (15B) is h ₂ , the height of the ceiling of the car (2) is configured such that d ≧ h−h ₂ .

Example 4. In each of the above embodiments, when the jump amount h of the passenger (10) is set, the initial speed v ₀ is the rated speed of the car (2), but the present invention is not limited to this. For example, a basket
If an overspeed detection device (not shown) is installed to detect that (2) has reached a predetermined overspeed, and the car (2) is emergency braked by the detection speed of this overspeed detection device, The excessive detection device and the detection speed may be set to the initial speed v ₀ .

[0027]

As described above, according to the first aspect of the present invention, when the height of the ceiling of the car is hoisted at a predetermined initial speed rather than the height of the passenger, the passenger is hoisted. Above the distance, and in the second invention,
Since the distance was set higher than the difference between the above distance and the distance that the car stopped when the car was braked, the amount of flight of the passenger was smaller than the distance from the passenger's head to the ceiling, and the passenger hit the head on the ceiling due to an emergency stop. There is an effect that can prevent this.

Further, in the third invention, a shock absorber is installed on the top of the hoistway or on the car, and in the fourth invention, the shock absorber is installed and the height of the ceiling is increased as in the first invention. Since the height is increased, the deceleration of the car when the car collides with the top of the hoistway is moderated, the amount of passengers jumping up is reduced,
The emergency stop has the effect of preventing passengers from hitting their heads on the ceiling.

[Brief description of drawings]

FIG. 1 is a perspective view of an elevator without a main rope showing a first embodiment of the present invention.

FIG. 2 is an explanatory view of a jumping phenomenon of passengers in the car in FIG.

FIG. 3 is an explanatory diagram of passenger jumping amount calculation in FIG. 2.

[Fig. 4] Fig. 4 is a configuration diagram of an elevator device without a main rope showing a third embodiment of the present invention, (A) is a diagram in which a shock absorber is installed at the top of a hoistway, and (B) is a diagram in which it is also installed on a car.

[Explanation of symbols]

 1 Hoistway 2 Car 8 Primary coil of linear motor 9 Permanent magnet 10 Passenger 15A, 15B Shock absorber

Claims (4)

[Claims] 1. A drive control device for driving and controlling the linear motor for each car driven by a linear motor, and a braking device mounted on the car, wherein the control device is operated while the car is moving upward. In an elevator configured such that the deceleration of the car when the car is braked by a braking device is greater than the deceleration of passengers in the car,
An elevator apparatus without a main rope, characterized in that the height of the ceiling of the car is higher than the height of the passenger by a distance more than the height at which the passenger can be hoisted when hoisting the passenger at a predetermined initial speed. 2. A drive control device for driving and controlling the linear motor for each car driven by a linear motor, and a braking device mounted on the car, wherein the control device is operated while the car is traveling upward. In an elevator configured such that the deceleration of the car when the car is braked by a braking device is greater than the deceleration of passengers in the car,
When the height of the ceiling of the car is raised above the height of the passenger by the passenger at a predetermined initial speed, the distance that the passenger can be raised, and by the drive control device or the braking device while the car is moving up. An elevator device without a main rope, characterized in that the elevator distance is increased by at least the difference from the stopping distance of the car when braking. 3. An elevator apparatus without a main rope, wherein an elevator having a car arranged in a hoistway and driven by a linear motor has a shock absorber installed on the top of the hoistway or on the car. 4. In an elevator having a car arranged in a hoistway and driven by a linear motor, a shock absorber is installed on the top of the hoistway or on the car, and the height of the ceiling of the car is set within the car. An elevator device without a main rope, characterized in that the height of the passenger is raised more than the height of the passenger by a predetermined initial speed and the difference is greater than the compression distance of the shock absorber.