JPH0597344A - Safety device for ropeless linear motor elevator - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to safely stop the car 16 when the linear motor loses propulsive force. [Structure] A plurality of steps 13 are provided on a hoistway wall 11 at predetermined intervals in the ascending / descending direction, a shock absorber 22 having a shock absorber 17 capable of reciprocating rotation is provided on a car 16, and a propulsive force of a linear motor is provided. When the car 16 disappears and the car 16 falls, the shock absorber 17 is rotated toward the hoistway wall 11 side to come into contact with the step 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The inventions of claims 1 to 3 are provided in a low-press linear motor elevator in which a car is raised and lowered in a hoistway without a rope by the propulsive force of the linear motor. The present invention relates to a safety device for a low press linear motor elevator that safely stops a car when the force is lost.

[0002]

2. Description of the Related Art FIG. 8 shows, for example, Japanese Utility Model Laid-Open No. 62-136476.
It is a block diagram which shows the conventional low press linear motor elevator similar to what was shown by the publication. In the figure,
On both side walls of the hoistway 1, a plurality of coils 2 are arranged along the vertical direction, and rails 3 extending in the vertical direction are provided. A plurality of permanent magnets 5 are provided on both side surfaces of the car 4 that moves up and down in the hoistway 1 along the rails so as to face the coil 2. The coil 2 and the permanent magnet 5 constitute a synchronous linear motor, and the propulsive force of this linear motor causes the car 4 to move up and down along the rail 3.

The conventional low-press linear motor elevator as described above has no consideration in terms of ensuring safety, and the basics of transportation for passenger transportation have not been established. In particular, in order to be established as a vertical transportation system, the safety system must be considered first.

[0004]

In the conventional low-press linear motor elevator constructed as described above, when the linear motor loses its propulsive force for some reason, the car 4 is located at the lowermost end of the hoistway 1. Will fall up to. On the other hand, in a rope-type elevator, the car is equipped with an emergency device that reliably grasps the rail when the rope breaks, and at the bottom of the hoistway to prevent the car from colliding with the ground when the car falls. A shock absorber is provided. However, in the low press linear motor elevator,
If a shock absorber is placed at the lowermost end of the hoistway, an extremely long shock absorber determined by the weight of the car 4 and the ascending / descending stroke is required, and it is practically difficult to apply the shock absorber of the rope type elevator as it is. There was a problem that was.

The inventions of claims 1 to 3 are intended to solve the above problems, and the car can be stopped safely even when the linear motor loses its propulsive force. The purpose of the present invention is to obtain a safety device for a low-press linear motor elevator that can be operated.

[0006]

According to a first aspect of the present invention, there is provided a safety device for a low press linear motor elevator, wherein a plurality of steps are provided in a hoistway wall at intervals in a hoisting direction,
The car is equipped with a shock absorber having a shock absorber capable of reciprocating in the direction of moving toward and away from the hoistway wall, and when the car's propulsive force is lost and the car falls, the shock absorber moves toward the hoistway wall side. The step is brought into contact with.

According to a second aspect of the present invention, there is provided a safety device for a low press linear motor elevator, wherein a plurality of steps are provided on a hoistway wall at intervals in a hoisting direction, an accelerometer is provided on a car, and the hoistway wall is brought into contact with and separated from the hoistway wall. The car is provided with a shock absorber having a shock absorber capable of reciprocating in the direction, and the shock absorber moves to the hoistway wall side and contacts the step in response to a signal from the accelerometer.

A safety device for a low-press linear motor elevator according to a third aspect of the present invention is provided with a plurality of steps on the hoistway wall at intervals in the hoisting direction, and is capable of reciprocating in a direction in which the hoistway wall comes into contact with and separates from the hoistway wall. A shock absorber having a shock absorber is provided in a car, and the shock absorber moves toward the hoistway wall side and comes into contact with the step according to the movement of a connecting member that connects the car and the propelling body.

[0009]

According to the present invention, when the propulsive force of the linear motor disappears, the shock absorber moves toward the hoistway wall side, whereby the shock absorber comes into contact with the step and the car is stopped safely.

According to the second aspect of the present invention, when the propulsive force of the linear motor disappears and the car falls, the acceleration at this time is detected by the accelerometer, and the shock absorber causes the hoistway wall to respond to the signal from the accelerometer. To the side, which causes the shock absorber to abut the step and safely stop the car.

In the third aspect of the present invention, when the propulsive force of the linear motor disappears, the connecting member moves with respect to the car, and the shock absorber moves toward the hoistway wall side in accordance with the movement of the connecting member. The bumper abuts the step and safely stops the car.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the inventions of claims 1 to 3 will be described below with reference to the drawings. Example 1. FIG. 1 is a front view showing a low press linear motor elevator having a safety device according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. In the drawing, on a hoistway wall 11 facing each other, main coils 12 which are hoistway-side constituent members of a linear motor are arranged in a vertical direction. A plurality of steps 13 are fixed to the hoistway wall 11 at predetermined intervals in the vertical direction.

Permanent magnets 14, which are cage members of the linear motor, are attached to both sides of a wing provided on both sides of a propulsion body 15 so as to face the main coil 12. Basket 16
Are suspended under the propelling body 15. A shock absorber 17 is attached to both side surfaces of the car 16 so as to be rotatable around an upper end thereof. The lower end of the shock absorber 17 is brought into contact with the step 13 by opening it as shown by a two-dot chain line in the figure. The shock absorber 17 is biased toward the hoistway wall 11 side by a spring 18 provided in the car 16, but is normally attracted to the car 16 side by a plunger 19 and a coil 20. The shock absorber 17 and the plunger 19 are connected by a bar 21. The shock absorber 22 of the first embodiment is the shock absorber 1
7, spring 18, plunger 19, coil 20 and bar 21
have.

Next, the operation will be described. Under normal conditions, the plunger 19 is attracted to the excited coil 20, and the shock absorber 17 is in close contact with the side surface of the car 16. In this state, the main coil 12 is excited, a propulsive force is generated in the linear motor, and the propulsion body 15 moves the car 16 up and down. When the propulsive force of the linear motor disappears due to some abnormality and the car 16 begins to fall, the excitation of the coil 20 is cut off, and the shock absorber 17 is pushed toward the hoistway wall 11 by the force of the spring 21. When the car 16 drops with the shock absorber 17 open, the lower end of the shock absorber 17 contacts the step 13. As a result, the shock absorber 17 operates and the car 16 is safely decelerated and stopped midway along the hoistway.

However, in the first embodiment described above, since the lower end of the shock absorber 17 is brought into contact with the step 13, the shock absorber 17 has sufficient buckling strength like the shock absorber of the rope type elevator. Will be needed. For this reason, the shock absorber 17 becomes large and heavy, and the electric power for moving the car 16 up and down becomes large.

Example 2. Therefore, in the following second embodiment, a tensile force is applied to the shock absorber. 3 is a front view showing a low-press linear motor elevator having a safety device according to another embodiment of the present invention, and FIG. 4 is a sectional view of the shock absorber shown in FIG. In the figure, a shock absorber 31 is attached to both side surfaces of the car 16 so as to be rotatable around its lower end. As shown in FIG. 4, the shock absorber 31 includes an oil pipe 32 filled with oil, a piston 33 provided in the oil pipe 32, a lower end portion attached to the piston 33, and an upper end portion from the upper end portion of the oil pipe 32. The piston bar 34 is pulled out, and the claw 35 is fixed to the upper end of the piston bar 34. Also, at the upper end of the oil pipe 32, an orifice
32a is provided. The shock absorber 36 of the second embodiment includes the spring 18, the plunger 19, the coil 20, and the bar.
It has 21 and a shock absorber 31.

Next, the operation will be described. At the time of abnormality, when the shock absorber 31 is pushed toward the hoistway wall 11 side by the force of the spring 21 as in the first embodiment, the lower portion of the claw 35 comes into contact with the step 13. As a result, the pawl 35, the piston bar 34, and the piston 33 stop, but the oil pipe 32 further moves downward together with the car 16. At this time, the oil in the oil pipe 32 jumps out from the orifice 32a, and the falling speed of the car 16 is gradually reduced. When the piston 33 moves to the upper end of the oil pipe 32,
16 is stopped.

Since the tensile strength of metal is usually higher than the buckling strength, such a tension type shock absorber 31 can be made smaller and lighter than the compression type shock absorber 17 of the first embodiment. .. Further, since the piston bar 34 is housed in the oil pipe 32 when the shock absorber 17 of the second embodiment is not in operation, the entire shock absorber 17 becomes compact and is advantageous in terms of mounting. Furthermore, if the opening diameter of the orifice 32a is made variable, the cushioning degree can be easily adjusted.

Here, the shock absorbers 17 and 31 of the above-described first and second embodiments.
Have one ends rotatably attached to the car 16. Therefore, for example, as shown in FIG.
Changes its angle from the start of operation until the car 16 stops, and always receives a tensile force in the longitudinal direction.
The shock absorber 17 of the first embodiment also receives a compressive force in the length direction.

The means for moving the shock absorbers 17 and 31 to the hoistway wall 11 side (here, means for cutting off the excitation of the coil 20) is
It may be manual or automatic. For example, as often used in ordinary rope type, the speed of the car 16 is monitored, it is judged as abnormal at a predetermined speed or more, and the coil is automatically
You may turn off the excitation of 20. However, in the low-press linear motor elevator, when the propulsion force disappears,
Since the acceleration of the car 16 is always the gravitational acceleration, it is preferable to monitor the acceleration of the car 16 in order to detect an abnormality quickly and surely.

Example 3. FIG. 6 is a configuration diagram showing a main part of a safety device for a low-press linear motor elevator according to an embodiment of the invention of claim 2, and the parts not shown are the same as those of the above-mentioned embodiment 1 or 2. In the figure, an accelerometer 41 for detecting the acceleration of the car 16 is connected to a discrimination circuit 42. The determination circuit 42 is connected to the transistor 43, and makes the transistor 43 non-conductive when the acceleration detected by the accelerometer 41 exceeds a predetermined value. Further, when the transistor 43 is conductive, the coil 20 is excited by the power supply Vc, and when the transistor 43 is non-conductive, the coil 20 is de-energized. Furthermore, this Example 3
The shock absorber 44 has a shock absorber 17 or 31, a spring 18, a plunger 19, a coil 20, a bar 21, a discrimination circuit 42, a transistor 43 and a power supply Vc.

Next, the operation will be described. When the propulsive force of the linear motor disappears due to some failure, the car 16 falls and its acceleration becomes gravitational acceleration. Then, the accelerometer 41 detects this, the transistor 43 becomes non-conductive, and the excitation of the coil 20 is cut off. As a result, the shock absorbers 17 and 31 are pushed toward the hoistway wall 11 as in the first and second embodiments,
The car 16 is safely stopped.

Example 4. Next, FIG. 7 is a main part configuration diagram showing a low press linear motor elevator having a safety device according to an embodiment of the invention of claim 3, and the hoistway side is the same as FIG. In the figure, the propellant 15 and the car 16 are
They are connected by a connecting rod 51 which is a connecting member. Connecting rod
A support rod 52 orthogonal to the support rod 52 is fixed to the 51, and the support rod 52 contacts the stopper 53 of the car 16 to suspend the car 16 on the propelling body 15 when a propulsive force is generated.

The upper end of the connecting rod 51 is fixed to the propelling body 15, and a spring is provided between the lower end of the connecting rod 51 and the car 16.
54 is provided. The connecting rod 51 is constantly urged toward the car 16 by the spring 54. Therefore, when the propelling body 15 loses the propulsion force, the connecting rod 51 moves downward with respect to the car 16. A bar 55 is rotatably provided at both ends between the connecting rod 51 and the shock absorber 31, and when the support rod 52 is in contact with the stopper 53, the shock absorber 31 is closed to the car 16 side and the support rod is closed. When 52 is separated from the stopper 53, the shock absorber 31 is opened to the hoistway wall 11 side. The shock absorber of the fourth embodiment
56 has a shock absorber 31 and a bar 55.

Next, the operation will be described. When the propulsive force of the linear motor disappears due to some failure, the connecting rod 51 moves downward with respect to the car 16 by the spring 54, that is, the car 16
And the propelling body 15 are attracted to each other. In response to the operation of the connecting rod 51, the bar 55 presses the shock absorber 31 against the hoistway wall 11 side. After that, the car 16 is safely stopped as in the second embodiment.

The shock absorber is only required to be able to safely stop the car 16, and the structure thereof is the shock absorber of each of the above embodiments.
It is not limited to 17, 31. Further, in each of the above-described embodiments, the low-press linear motor elevator in which the permanent magnet 14 is mounted on the propulsion body 15 is shown. However, the inventions of claims 1 and 2 are the car side of the linear motor as in the conventional example. It can also be applied to those in which the constituent members are directly mounted on the car. Further, in each of the above-mentioned embodiments, the shock absorbers 17 and 31 and the step 13 are arranged one by one on both sides of the car 16, but the number and arrangement of these are not limited to the above-mentioned respective embodiments. Two or more pairs may be arranged in each.

[0027]

As described above, in the safety device for a low press linear motor elevator according to the first aspect of the present invention, a plurality of steps are provided on the hoistway wall, and the steps can be reciprocated in the direction toward and away from the hoistway wall. A shock absorber with a shock absorber was installed in the car, so that when the propulsive force of the linear motor disappears and the car falls, the shock absorber moves toward the hoistway wall side and contacts the step, so the linear motor propels Even when the power is lost, the car can be safely stopped, and the possibility that the future skyscraper can be used as a transportation means is enhanced.

According to a second aspect of the present invention, there is provided a safety device for a low press linear motor elevator, wherein a plurality of steps are provided in a car, an accelerometer is provided in the car, and a buffer capable of reciprocating in a direction toward and away from a hoistway wall. In addition to the effect of the invention of claim 1, in addition to the effect of the invention of claim 1, a shock absorber having a shock absorber is provided in the car, and the shock absorber moves to the hoistway wall side and contacts the step in response to a signal from the accelerometer. It is possible to detect the loss of the propulsion force quickly and further improve the safety.

Further, a safety device for a low-press linear motor elevator according to a third aspect of the present invention is a shock absorber having a plurality of steps on a hoistway wall and having a shock absorber capable of reciprocating in a direction toward and away from the hoistway wall. In addition to the effect of the invention of claim 1, the shock absorber is provided on the car, and the shock absorber moves to the hoistway wall side to come into contact with the step according to the movement of the connecting member that connects the car and the propulsion body. As a result, it is possible to more reliably detect the loss of the propulsion force, and it is possible to further improve safety.

[Brief description of drawings]

FIG. 1 is a front view showing a low-press linear motor elevator having a safety device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view showing the construction of a low press linear motor elevator having a safety device according to another embodiment of the present invention.

4 is a cross-sectional view of the shock absorber of FIG.

5 is an explanatory diagram showing changes in the angle of the shock absorber in the operation start state and the car stop state of FIG. 3. FIG.

FIG. 6 is a configuration diagram showing a main part of a safety device for a low press linear motor elevator according to an embodiment of the invention of claim 2;

FIG. 7 is a configuration diagram of essential parts showing a low press linear motor elevator having a safety device according to an embodiment of the invention of claim 3;

FIG. 8 is a configuration diagram showing an example of a conventional low-press linear motor elevator.

[Explanation of symbols] 11 Hoistway wall 13 Step 15 Propulsion body 16 Car 17 Shock absorber 22 Shock absorber 31 Shock absorber 36 Shock absorber 41 Accelerometer 44 Shock absorber 51 Connecting rod (connecting member) 56 Shock absorber

Claims (3)

[Claims] 1. A step in which a plurality of steps are provided on a hoistway wall at a distance from each other in a car ascending / descending direction, and a shock absorber provided on the car and capable of reciprocating in a direction toward and away from the hoistway wall. And a shock absorber that stops the car by moving the shock absorber toward the hoistway wall and abutting the step when the driving force of the linear motor is lost and the car falls. A safety device for a low-press linear motor elevator, characterized by being equipped with. 2. A plurality of steps provided on a hoistway wall at intervals with respect to each other in a car ascending / descending direction, an accelerometer provided on the car, and a car provided on the hoistway wall. It has a shock absorber capable of reciprocating in the direction of approaching and separating, and in response to a signal from the accelerometer, the shock absorber moves toward the hoistway wall side and comes into contact with the step, thereby removing the car. A safety device for a low press linear motor elevator, which is provided with a buffer device for stopping. 3. A low press linear in which a propelling body on which a car side constituent member of a linear motor is mounted and a car are connected by a connecting member which moves up and down with respect to the car depending on the presence or absence of the propulsive force of the linear motor. In a safety device for a motor elevator, a plurality of steps are provided on a hoistway wall at intervals in the car hoisting direction, and reciprocating in a direction provided on the car and moving toward and away from the hoistway wall. A shock absorber that has a shock absorber and stops the car by moving the shock absorber toward the hoistway wall side and abutting the step according to the movement of the connecting member. Safety equipment for low-press linear motor elevators.