JPH1059662A - Elevator car position fixing device and shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator car position fixing device capable of resolving the danger of the lifting/lowering actions of a car in the opened state of car doors. SOLUTION: Lower ends of car door fixing sections 2b at the front ends of car side fixing tools 2A, 2B are fixed to the upper ends of car doors 1b1, 1b2 suspended on a car 1A via rollers. Car suspension sections 2c at the rear ends of the car side fixing tools 2A, 2B are made movable against the car 1A via rollers. A drive section 5A is provided on the ceiling section 1d of the car 1A, drive arms 2f of the car side fixing tools 2A, 2B are driven by the drive section 5A via a drive lever 1e, and car fixing sections 2a at the tips of the car side fixing tools 2A, 2B are protruded to the hoistway side. Hoistway side fixing tools are fixed to the hoistway at each floor, and they prevent the vertical movement of the car 1A via the car fixing sections 2a protruded when the car 1A is stopped at each floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car position fixing device and a shock absorbing device.

[0002]

2. Description of the Related Art There are three types of elevator driving methods using a rope type and a hydraulic type and a linear motor which has been recently developed.

[0003] Among them, in a rope type elevator, in order to fix the position of the car, a brake for applying a brake to the rotating shaft of the hoist and a case where the speed of the car is abnormally high is provided in the car. Activated by the detection signal of the governor,
An emergency stop (safety) for stopping the car via the guide rail is provided.

[0004] Further, the hydraulic elevator is also provided with the above-mentioned emergency stop, and the car is stopped during a steady operation by supplying the cylinder to the cylinder and stopping the flow of hydraulic oil discharged from the cylinder by an electromagnetic valve. ing.

On the other hand, in a passenger elevator using a linear motor, a method of pressing a brake shoe against a guide rail has been studied, but a brake system for symmetric commercial operation has not yet been established.

[0006] In a rope-type elevator installed in a high-rise building, the amount of elongation of the rope differs depending on the number of passengers in the car. As a result, the position of the floor of the stopped car greatly differs from the floor of the hall. In such a case, the brake is released while the door of the cab is open, and the stop position is corrected by inching the hoist.

[0007]

[Problems to be solved by the invention]
In the case of a rope-type elevator that adopts the method of correcting the stop position of the car described above, if the control system of the car should fail for any reason, the car will move up and down significantly while correcting the stop position of the car. There is a possibility that. Then, the car door may move up and down in the open state.

Also in a hydraulic elevator, if the load on the car fluctuates rapidly, the position of the car fluctuates due to the compressibility of the hydraulic oil. In the case of the indirect type, the elongation of the rope is further added. Therefore, the fluctuation of the stop position of the car,
Not only becomes more remarkable than in the case of a rope-type elevator, but it also causes discomfort to the user due to the correction of the car position.

Further, the car door is designed not to open with a certain force or less when the car is not stopped at the stop position. Sometimes it drops.

On the other hand, in the method of mechanically holding, even if a power failure occurs, the door must be opened at the landing and must not be opened outside of the landing, so that the structure is complicated.

Further, a shock absorber is provided upright at the lower part of the hoistway. However, since the outer shape becomes larger in accordance with the rating of the car, for example, when the stop floor becomes an intermediate portion of a high-rise building, the stop is stopped. The effect on the lower floors of the floor increases, and more parts become unavailable.

Accordingly, a first object of the present invention is to provide an elevator car position fixing device which can eliminate the possibility of raising and lowering a car in an open state of a car door, and a second object of the present invention. The aim is to obtain an elevator shock absorber that can reduce the effect on the lower floors.

[0013]

According to a first aspect of the present invention, there is provided a car position fixing device for an elevator, which is driven by a driving unit provided in the car and which advances and retreats in the direction of a wall of a hoistway from the car. A car door suspended on one side of the car-side fixing portion, which opens and closes by advancing and retreating of the car-side fixing portion, and a lifting and lowering portion in which a tip of the car-side fixing portion which is disposed on the hoistway and advances toward the wall of the hoistway has a loose fit And a roadside fixture.

According to a second aspect of the present invention, there is provided an elevator car position fixing apparatus comprising: a car door which is opened and closed by a first drive unit provided on the car; and a second drive unit provided on the car. A car-side fixing part that is driven to move in the direction of the hoistway wall or is prevented from retreating by the opening operation of the car door, and a hoistway-side fixing tool that is disposed on the hoistway and into which the tip of the advancing car-side fixing part is loosely fitted. And characterized in that:

According to a third aspect of the present invention, there is provided an elevator car position fixing device for detecting a height of a car side fixing member which is loosely fitted to a hoistway side fixing member, and correcting the position of the car using this detection signal. A position detector for outputting to the car position correction unit is provided on the hoistway-side fixture.

According to a fourth aspect of the present invention, there is provided an elevator car position fixing device, wherein a lock for preventing advancement of the car side fixing portion is provided between the hoistway side fixing tools of the hoistway. I do.

Further, according to a fifth aspect of the present invention, there is provided an elevator shock absorbing device, wherein a coil spring loosely fitted to a pair of guide rods erected on both sides of a hoistway pit, And a car support for supporting a convex portion on a side surface of the car descending the hoistway with a concave portion formed in the middle portion through which the upper end of the guide rod penetrates.

According to the first aspect of the present invention, a change in the car stop position due to a sudden change in the loaded load of the car is prevented by the car-side fixing tool whose tip is loosely fitted to the hoistway-side fixing tool. I do.

Further, in the invention according to claim 2,
A change in the car stop position due to a sudden change in the load of the car is prevented by the car-side fixing tool whose tip is loosely fitted to the hoistway-side fixing tool, and the car with the car door open is prevented from retracting by the car door. The car-side fixture prevents the lifting operation.

In the invention according to claim 3,
The stop position of the car due to a sudden change in the load of the car is corrected by the car position correction unit.

Further, in the invention according to claim 4,
Except at the stop position of the landing, the locking operation prevents the opening operation of the car door.

Further, according to the fifth aspect of the present invention, in the event that the car falls, the impact is reduced by the car supports mounted on the plurality of coil springs.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an elevator car position fixing device and a shock absorber according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of an elevator car position fixing device according to the present invention, showing a car side, and FIG. 2 (a) shows a hoistway side.

In FIG. 1, the car 1A shows a case where the car door is a double door with a central double door, but the same applies to a case where the car is a double door with a central double door. That is, the car doors 1b1, 1b
2, the upper end is suspended via a roller on a rail (not shown), similarly to the conventional car door, but these rails and rollers are larger in strength and larger in size than the conventional car rails and rollers. Has become.

The upper surface of the above-mentioned roller is opposed to a reinforced auxiliary rail (not shown) which is provided laterally on the cab side and has a slight gap. At the upper end of the left car door 1b1,
The lower end of the car door fixing portion 2b at the front end of the car side fixing device 2A is fixed with a plurality of bolts. Same door 1b on the right
The lower end of the car door fixing portion 2b at the front end of the right car side fixing device 2B is fixed to the upper end of 2 with a plurality of bolts.

A rail (not shown) is horizontally provided on the upper side of the rear side of the car room 1a, similarly to the upper side of the front car doors 1b1 and 1b2. A rear car suspension portion 2c is vertically suspended movably to the left and right via rollers (not shown). At the center of the car-side fixing device 2A, a car fixing portion 2a is provided to protrude to the left.

Similarly, the car suspension portion 2c, which is suspended from the rear end of the right car-side fixture 2B, is also movable left and right by the rollers sandwiching the rails above and below.
At the center of the car-side fixing device 2B, a car fixing portion 2a is provided to protrude rightward.

At the center of the upper surface of the ceiling 1d of the car room 1a, a car door drive unit 5 including an electric motor is mounted. The car door drive unit 5 is configured by a speed reducer that reduces the rotation of the electric motor with respect to the electric motor.

The center of the drive lever 1e is connected to the output shaft of the drive unit 5A of the car door via a key (not shown). Oval guide grooves are formed on both sides of the drive lever 1e, and the inner circumference of the guide grooves is hardened by induction hardening to improve wear resistance.

At the center of the left and right car side fixtures 2A, 2b, a drive arm 2f is provided so as to project in the direction of the drive section 5A.
Pins whose details are omitted are fixed to the tips of the drive arms 2f, bearings are inserted into these pins, and the bearings are inserted into the guide grooves formed in the drive lever 2e described above. Reference numeral 1a indicates a side plate forming a car room, and reference numeral 1c indicates a threshold at which a guide shoe at the lower end of each of the car doors 1b1 and 1b2 fits loosely into a groove.

Next, FIG. 2A shows the car-side fixture 2A,
2B shows the hoistway-side fixture 3 in which the car fixing part 2a of the car 2B is loosely fitted by the operation of the car door driving part 5.

The hoistway-side fixture 3 is fixed to a car guide rail of the hoistway via a bracket (not shown) and a rail clip, and is used to operate the car door driving unit 5 at a position where the car has landed. Accordingly, the car fixing portion 2a is loosely fitted as shown by a chain line in FIG.

That is, the hoistway-side fixture 3 comprises a base 3a fixed to the wall surface of the hoistway by the bracket and the rail clip described above, and a reinforcement made of channel steel with its rear end welded to the top and bottom of the base 3a. Frames 3b1, 3b2 and reinforcing frames 3c1, 3c2, and these reinforcing frames 3b1, 3b
The guide plates 3d and 3e are welded to opposing surfaces in the vertical direction of 2, 3c1 and 3c2.

At the center of these guide plates 3d and 3e,
As shown in FIG. 2 (b), which shows a partially enlarged detailed view of FIG. 2 (a), the limit switch 6 is symmetrically mounted via the mounting plate 7 with the operation piece facing the opposite side.

Next, the operation of the elevator car position fixing device thus configured will be described. When the car 1A has landed on a predetermined floor, the car door drive unit 5 is driven by a signal from a position detector (not shown), and the drive lever 1e is driven counterclockwise.

Then, the car-side fixtures 2A and 2B are driven right and left, and the car doors 1b1 and 1b2 also open.
State. At this time, the tip of the car fixing portion 2a protruding from the car side fixing tools 2A and 2B is connected to the front end of the car fixing portion 2a as shown in FIG.
As shown in (b), the upper and lower reinforcement frames 3b1, 3c1 of the hoistway-side fixture 3 are loosely fitted between the guide plates 3d, 3e on the opposing surfaces.

Next, even when the total load of the car fluctuates greatly due to the user getting on and off the car, and the main cable greatly expands and contracts, the car fixing portion 2a contacts one side of the upper and lower guide plates 3d and 3e. Thus, the movement of the car can be prevented, so that a significant change in the position of the car can be suppressed.

Even if the car fixing portion 2a comes into contact with one side of the upper and lower guide plates 3d and 3e, the car position is corrected to a predetermined position by performing the above-described car position correction. . The car whose position has been corrected is driven to a predetermined floor by a passenger's hall call after the closing operation of the car door.

Further, as described in the background art, even if the car starts to move up and down due to the failure of the control system during the car position correction, the car fixing section 2a is connected to the hoistway side fixture 3 by any means. Since the car is engaged, it is possible to prevent the car from being lifted and lowered in the open state, and the car can be raised and lowered only when the car is in the closing operation state.

The operating position of the limit switch 6 is
By setting before the car fixing portion 2a comes into contact with the upper and lower guide plates 3d and 3e, the correction operation of the car position can be hastened as described later, and the car elevating operation can be hastened. The hoistway side fixture 3 may be reinforced by welding a reinforcing plate to the outer surface side of the reinforcing frames 3b1, 3b2, 3c1, 3c2 depending on the rated load of the car.

The inventor manufactured the loose fitting portion of the car fixing portion 2a of the hoistway-side fixing device 3 with the following dimensions. That is, the thickness of the car fixing portion 2a is 20 mm, and the interval between the guide plates 3d and 3e is 1
The reference value of the distance between the upper and lower surfaces of the car fixing portion 2a and the guide plates 3d and 3e is 50 mm when the car fixing portion 2a is located at the center. The operation of the upper and lower limit switches 6 was performed when the distance between the car fixing portion 2a and the guide plates 3d and 3e became 30 mm.

Therefore, in the elevator car position fixing device prototyped by the inventor, when the lower limit switch 6 is operated due to, for example, a sudden increase in the load of the car, the car position correction function is not activated. 30 baskets unconditionally
mm. If the vehicle descends slowly, it is corrected by the car position correction function.

Also, if the car rises by 50 mm due to an abnormality in the control device and is stopped by the hoistway-side fixture 3, if the main rope is broken, the car descends. The descent time is about 0.1 seconds.

Next, FIG. 3 shows a second embodiment of the car position fixing device of the present invention, which is applied to a car of a linear motor elevator, and shows a case where a car door is open. In FIG. 3, bearings, which are not described in detail, are inserted into oblong holes formed on both sides of a drive lever 1e which is rotated by a drive unit 5B provided at the center of the ceiling 1d of the car 1B. A shaft (not shown) press-fitted into the inner ring of the bearing is a cage fixing plate 8.
A and 8B are fixed to one side. Behind the car fixing plate 8B, a storage detection switch 9 for detecting the operating position of the car fixing plates 8A and 8B is provided.

The other side of these car fixing plates 8A and 8B
The car 1B protrudes from both sides of the ceiling 1d, and has a stopper 8a protruding from the upper surface. On the other hand, basket door 1b
The lower surfaces of the front ends of the suspension frames 4A, 4B are fixed to the upper ends of the suspension frames 4A, 4B, and a pair of guide rollers (not shown) are attached to the rear ends of the suspension frames 4A, 4B.

These guide rollers are vertically and movably clamped by a pair of guide rails (not shown) which are laterally provided so as to be vertically opposed to the upper rear surface of the car 1B.

Similarly, guide rollers (not shown) provided above the car doors 1b1 and 1b2 also move left and right from the up and down directions by guide rails (not shown) which are provided so as to be arranged vertically above and below the front surface of the car 1B. It is pinched freely.

At the center of the front surface of the car 1B, a car door drive unit 10 in which an electric motor is housed is fixed, and the car door drive unit 10 has a rotating shaft 11 penetrating therethrough. This rotating shaft 11
A nut portion driven left and right by the rotation of the rotation shaft 11 is engaged with the left and right of the car door 1b.
1, 1b2 are fixed to the front ends of the suspension frames 4A, 4B. The capacity of the motor housed in the car door drive unit 10 is 1.5 times the capacity of the motor of the drive unit 5B.

On the left and right hoistway walls of the car 1B, when the car is stopped at the landing position, the elevator-side fixture 3 shown in FIG. Are similarly arranged.

In the elevator car position fixing device thus constructed, similarly to the first embodiment, when the car stops on a predetermined floor, the driving unit 5B causes the leading ends of the left and right fixing plates 8A, 8B to move. Is loosely fitted to the central portion of the hoistway-side fixture 3, and its position is corrected by the detection signal of the limit switch 6. However, even if the car is driven up and down during the position correction, the fixing plate 8A , 8B,
The movement can be prevented.

When the car 1B is operated and the car 1B is lifted or lowered by the operation of the car 1B when the door is open, the evacuation command is issued to the fixed plates 8A and 8B.
Since the retracting operation of the fixing plates 8A and 8B is prevented by this, the raising and lowering operation of the car in the open state of the door can be prevented. That is, after the fixed plates 8A and 8B are retracted and the operation signal of the storage detection switch 9 is input, the control device issues an elevator up / down command.

In the first and second embodiments, the fixing portions 2a of the fixtures 2A and 2B of the car landing on each floor and the tips of the fixing plates 8A and 8B shown in FIG. 5. The car door of a car other than the landing position is prevented from being opened by a vertical installation of an angle iron or the like at a position other than the position where the car is to be opened, and the car door is prevented from being opened due to mischief.
The invention described in (1) may be adopted.

FIG. 4 is a perspective view showing a first embodiment of an elevator shock absorber according to the present invention. FIG. 4 is a view corresponding to claim 5, and FIG. 5 is a hoistway side of the first embodiment. It is a perspective view which shows the shock absorber of FIG. Among them, a car-side fixing 13 having a U-shaped fixing portion 13a formed on both sides is placed and fixed on the ceiling of the car 1C shown in FIG.

On the other hand, in the pit of the hoistway, a car-side fixture is provided.
A pair of shock absorbers 14 described below are provided upright at positions opposed to the fixing portions 13a of the thirteen. In other words, in the shock absorber 14, prisms 16 are erected on both sides of the fixing plate 15 which is fastened with anchor bolts cast in the pit and the fixing holes 15a are formed on the left and right, and the lower end is fixed to the fixing plate 15. Welded. The lower portion of the guide rod 17 is inserted into the upper portion of the prism 16.

A compression coil spring 18 for buffering is loosely fitted to each of the guide rods 17, and a lower end thereof is positioned on an upper surface of the guide rod 17 and is positioned by a spring receiver whose details are omitted. The upper part of the guide rod 17 is provided with a basket holder formed in a substantially V shape.
Both ends of 19 are inserted, and the compression coil spring 18 is set to a predetermined compression force by a spring retainer 20 screwed from above the car receiver 19. In addition, the concave portion at the center of the basket receiver 19
The shock absorber 14 is provided upright at a position where 19a is opposed to the fixing portion 13a shown in FIG.

In the elevator shock absorber configured as described above, if the car falls into the pit,
The fixing portions 13a at both ends of the car-side fixing device 13 are supported by the concave portions 19a of the car support 19 of the shock absorber 14, and the compression coil springs
The impact is reduced by the flexure of 18, but the impact of the car is reduced by four compression coil springs 18 on one side and eight compression coil springs 18 on the left and right, so the height of the shock absorber 14 can be suppressed, and The effect of can be prevented. The car receiver 19A may be formed in a U-shape as shown in FIG. 6 so as to prevent interference with structures on the side of the car.

[0057]

As described above, according to the first aspect of the present invention,
A car-side fixed section that is driven by a drive section provided in the car and moves back and forth in the direction of the wall of the hoistway from the car, and a car door that is suspended on one side of the car-side fixed section and that opens and closes by opening and closing the car-side fixed section, By providing a hoistway-side fixing device that is disposed on the hoistway and to which the tip of the car-side fixing portion that has advanced in the wall direction of the hoistway loosely fits, the change in the car stop position due to a sudden change in the loaded load of the car is caused by Is prevented by the car-side fixing device which is loosely fitted to the hoistway-side fixing device, so that it is possible to obtain an elevator car position fixing device which can eliminate the risk of the car lifting and lowering operation in the open state of the car door.

According to the second aspect of the present invention, the car door which is opened and closed by the first drive unit provided in the car, and the hoistway which is driven by the second drive unit provided in the car A car-side fixing part that is prevented from moving forward or backward by the opening operation of the car door in the direction of the wall, and a hoistway-side fixing tool that is disposed in the hoistway and into which the tip of the advanced car-side fixing part loosely fits. The change of the car stop position due to the sudden change in the load of the car is prevented by the car-side fixture whose tip is loosely fitted to the hoistway-side fixture, and the car with the car door in the open state moves backward by the car door. Since the raising and lowering operation is prevented by the prevented car-side fixing device, it is possible to obtain a car position fixing device for an elevator that can eliminate the possibility of raising and lowering the car in the open state of the car door.

According to the third aspect of the present invention, the height of the car-side fixture that is loosely fitted to the hoistway-side fixture is detected,
By providing a position detector that outputs this detection signal to the car position correction unit that corrects the position of the car in the hoistway-side fixture,
Since the stop position of the car due to a sudden change in the load of the car is corrected by the car position correction unit, a car position fixing device for an elevator that can eliminate the risk of the car moving up and down in the open state of the car door is obtained. Can be.

According to the fourth aspect of the present invention, by providing a lock between the hoistway-side fixtures of the hoistway to prevent the car-side fixing portion from moving forward,
Since the opening operation of the car door is prevented by the locking device, it is possible to obtain an elevator car position fixing device capable of eliminating the possibility of the car moving up and down in the open state of the car door.

Further, according to the invention described in claim 5,
A coil spring which is loosely fitted to a pair of guide rods erected on both sides of the hoistway pit, and a concave portion formed in the middle part through which the upper ends of the guide rods are placed on both sides at the upper end of the coil spring and the upper end of the guide rod penetrates. By providing a car support that supports the convex part of the side of the car that descends the hoistway, in the event that the car falls, the impact was reduced by the car support placed on multiple coil springs, An elevator shock absorber that can reduce the influence on the lower floor side can be obtained.

[Brief description of the drawings]

1 is a first view of an elevator car position fixing device according to the present invention;
FIG. 2 is a partial perspective view showing the embodiment.

FIG. 2 (a) is a partial perspective view different from FIG. 1 showing the first embodiment of the elevator car position fixing device of the present invention.
(B) is a partial enlarged sectional view of (a).

FIG. 3 is a second view of the elevator car position fixing device according to the present invention;
FIG. 2 is a partial perspective view showing the embodiment.

FIG. 4 is a partial perspective view showing a first embodiment of an elevator shock absorber according to the present invention.

FIG. 5 is a partially enlarged perspective view showing a first embodiment of an elevator shock absorber according to the present invention, which is different from FIG. 4;

FIG. 6 is a partially enlarged perspective view showing a second embodiment of the elevator shock absorber according to the present invention.

[Explanation of symbols]

1A, 1B ... car, 1a ... car room, 1b1, 1b2 ... car door, 1c ... sill, 1d ... ceiling, 1e ... drive lever,
2A, 2B, 13 ... car side fixture, 2a ... car fixing part, 2
b: car door fixing part, 2c: car suspension part, 2f: drive arm,
3 ... hoistway side fixture, 3a ... base, 3b1, 3b2
3c1, 3c2 ... reinforcement frame, 3d, 3e ... guide plate, 4A,
4B: Suspension frame, 5A, 5B: Drive unit, 6: Limit switch, 7: Mounting plate, 8A, 8B: Car fixing plate, 8a: Stopper, 9: Storage detection switch, 10: Car door drive unit, 11
... Rotating shaft, 13a ... Fixed part, 14 ... Buffer, 15 ... Fixed plate, 16
... Square pillar, 17 ... Guide plate, 18 ... Compression coil spring, 19A, 19B
... Cage holder, 19a ... Valley, 20 ... Spring retainer.

Claims (5)

[Claims] 1. A car-side fixed part which is driven by a drive unit provided on a car and advances and retreats from the car in the direction of a wall of a hoistway, and a car-side fixed part which is suspended on one side of the car-side fixed part and which advances and retreats. A car position fixing device for an elevator, comprising: a car door that opens and closes; and a hoistway-side fixing tool that is disposed on the hoistway and has a front end of the car-side fixing portion that is advanced toward the wall of the hoistway and loosely fits. 2. A car door which is opened and closed by a first drive unit provided on the car, and which is driven by a second drive unit provided on the car to advance and retreat toward a wall of the hoistway, and A car position fixing device for an elevator, comprising: a car-side fixing portion that is prevented from retreating by a door opening operation; and a hoistway-side fixing device that is disposed in the hoistway and into which the tip of the advancing car-side fixing portion loosely fits. 3. A position detector for detecting a height of the car-side fixture loosely fitted to the hoistway-side fixture and outputting a detection signal to a car position correcting unit for correcting the position of the car. The elevator car position fixing device according to claim 1 or 2, wherein the device is provided on a roadside fixture. 4. The lock according to claim 1, further comprising a lock between the hoistway-side fixing member of the hoistway and the car-side fixing portion for preventing the cage-side fixing portion from moving forward. Elevator car position fixing device. 5. A coil spring loosely fitted to a pair of guide rods erected on both sides of a hoistway pit, and both ends are mounted on the upper ends of the coil springs, the upper ends of the guide rods penetrate and intermediate portions are provided. And a car support for supporting a convex portion on a side surface of the car descending the hoistway with a concave portion formed in the elevator.