JPH02305782A - Elevator - Google Patents

Abstract

PURPOSE:To maintain the distance between the left side and the right side rail guide shoes constant and to eliminate the generation of a derailment trouble by linking the rail shoes furnished at the upper side and the lower side, and at the left side and the right side, of a cage, with connecting frames, and providing actuators to drive the connecting frames in the horizontal direction. CONSTITUTION:Rail guide shoes 7 are provided at the left side and the right side, and at the upper side and the lower side, of a cage, so as to gear with two guide rails 9 arranged almost vertically, and they are moved up and down along the guide rails 9. In this case, the rail guide shoes 7 at the left side and the right side are linked with a connecting frame 11. As a result, the distance between the rail guide shoes 7 is made constant, and no derailment trouble is generated however position control is carried out by actuators 17 and 20 to drive the connecting frame 11 in the horizontal direction. And by controlling the X-axis direction and the Y-axis direction in the horizontal surface with the actuators 17 and 20, the number of the actuators 17 and 20 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevator, and particularly to a support structure for an engager that engages with a guide rail.

[Prior Art] In recent years, the number of high-rise buildings has increased, and as a result, there has been a tendency for elevators with high rated lifting speeds to increase. As the lifting speed increases, guide rail installation requires higher precision in construction work, and construction technology has progressed, but guide rail installation is still difficult due to errors. Lateral vibration has become a problem. In order to absorb running vibrations in automobiles and railway vehicles, it is common practice to use springs with a relatively low spring constant in the suspension mechanism of the traveling body, and to install an oil damper in addition to this spring. However, in elevators, if the rail engager is attached to the car using a bouncing device with a relatively low spring constant,
There are problems in that the car tends to tilt due to eccentric loads, and that the car swings horizontally when passengers or carts get on board. In addition, a problem unique to elevators is that the door on the building side, that is, the hatch door, is opened and closed by the door on the car side of the elevator, that is, the cage door, by the engagement action, so the car must be guided in the hoistway with extremely strict dimensional accuracy. It was difficult to lower the spring constant of the suspension mechanism.

However, in elevators, the total length of the guide rail, which is the running path, is relatively short, and the elevator repeatedly moves back and forth on the same rail, making it easy to incorporate learning control and schedule control. In addition, in skyscrapers, the high-speed travel zones where lateral vibration of the car is a problem are non-stop floors, and it is only in the low-speed travel zones that it is necessary to accurately guide the car up and down in order to engage and open the door. There are special circumstances that make it so.

Therefore, an actuator for horizontally driving the rail engaging element from the car is provided, and the actuator actively drives the car to minimize the shaking of the car.
There are Japanese Patent Laid-Open No. 62-74897, etc.

[Problems to be Solved by the Invention] Conventional elevators are configured as described above, and the distance between the support points of the guide rail, which is the running path, is wide in accordance with the floor pitch of the building, and the second moment of inertia of the rail is small. Because it is relatively small, the spring constant of the horizontal displacement of the rail fluctuates greatly periodically in the direction of lifting and lowering operations, so the control described above tends to become unstable, and if the spacing between the left and right rail engagers becomes too large. If control is performed incorrectly in such a direction, there is a risk of causing a serious accident such as the train falling off the rail.

Additionally, there are four sets of rail engagers on the top and bottom, left and right sides of the car, and if actuators are installed, a total of eight actuators are required if each of these four sets is installed in the X-axis direction and Y-axis direction in the horizontal plane. It is uneconomical.

An object of the present invention is to provide an elevator that has a simple structure and prevents rails from coming off.

[Means for Solving the Problems] In order to achieve the above object, the present invention is characterized by providing a connecting frame that connects the left and right rail engagers, respectively, and an actuator that drives the connecting frame in the horizontal direction. do.

[Function] Since the elevator according to the present invention is configured as described above, the left and right rail engagers are connected by the connecting frame, so the spacing between them is constant, and no matter what kind of control is performed by the actuator, there will be no accident of the car falling off the rails. Does not occur. In addition, an actuator is installed in the connecting frame that connects the left and right rail engagers, and this actuator controls the X-axis and y-axis directions in the horizontal plane. Since the number of actuators can be reduced, the entire system including its control device can be constructed economically.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a top perspective view of an elevator showing an embodiment of the present invention, and FIG. 2 is a schematic front view of the entire elevator shown in FIG.

FIG. 2 shows a general elevator, in which a platform is supported by a main rope 1, and a cage 5 is supported on this plant form via vibration isolating rubber 6. The car constructed in this way is guided along a pair of guide rails 9 provided substantially perpendicular to the wall surface of the hoistway. Plan 1-form is composed of an upper frame 2 and a lower frame 4 arranged above and below a cage 5, and a vertical frame 3 connecting these frames. There are generally two guide rails on the left and right sides of the car, and they are attached to the elevator tower by rail support points 10. Although this rail support point is not specifically shown, it is usually composed of a rail bracket, a rail clip, and the like. The left and right upper guide shoes 7 are connected to each other by an upper connecting frame 11 via an upper guide shoe vibration isolator 13, and the left and right lower guide shoes 8 are connected to a lower connecting frame 12 via a lower guide shoe vibration isolator 14. connected. The vibration isolating rubbers 13 and 14 for the guide shoes absorb slight errors in the rail spacing caused by errors in installing the left and right rails, and have a high spring constant. Guide shoes 7 are provided as a pair on both the left and right sides of the upper and lower parts of the car.
．． 8 in general.

Although they can be individually attached to the platform via anti-vibration rubber or springs, in this embodiment, the left and right guide shoes 7.8 are first connected using the connecting frames 11 and 12, and then the connecting frames 11 and 12 are attached to the upper connecting frame. Supporting anti-vibration rubber 15. It is attached to the platform via vibration isolating rubber 16 for supporting the lower connecting frame. This vibration isolating rubber 15 and 16 for supporting the connecting frame is the second
It is for floatingly supporting the connecting frame in both directions of the X+3' axis in the figure, that is, in the horizontal plane, and its spring constant is set relatively low. An upper longitudinal drive actuator 17 for controlling the illustrated y-axis direction, that is, the longitudinal direction, is disposed on the bracket portion 2' projecting from the upper frame 2, and the arm 18. It is attached to the upper connecting frame 11 via a connecting link 19. Furthermore, there is a bracket part 2 protruding from the upper frame 2.
'', and an upper left-right drive actuator 20 for controlling in the X-axis direction shown in the figure, that is, in the left-right direction, is arranged.

Arm 21. It is attached to the upper connecting frame 11 via a connecting link 22. Although not shown, there are also vertically symmetrical actuators on the lower side, an actuator for longitudinal movement and an actuator for horizontal movement, which are attached to the lower frame of the platform with brackets. In this way, the actuators 17, 20 are respectively connected to the connecting frame 11, which is suspended horizontally floating from the platform.
12 in the longitudinal and lateral directions to control the relative position of the platform and the connecting frame.

In this embodiment, it is desirable that the spring constant of the vibration isolating rubber 15-16 for supporting the connecting frame be low, since this will not put a burden on the position control by the actuator 17-20. It has drawbacks such as being prone to tilting. On the other hand, vibration isolating rubber for supporting the connecting frame 15.16
It is also possible to increase the spring constant of the actuator 17 to ensure stability and increase the output of the actuator 17°20 accordingly.

In the configuration in which one set of actuators 17 and 20 in the y-axis and y-axis directions are provided at the top and bottom of the car as in this embodiment, the swinging of the car in the y-axis and y-axis directions, the pitching and rolling of the car, The actuator can control the vibrations of the 4@ type including rotational movement around the y-axis and rotational movement around the y-axis. On the other hand, yaw, i.e. the y axis, y
The rotational movement about a vertical axis perpendicular to the axial plane is not controlled in the actuator 17.20 according to the invention.

However, in an elevator, yawing rarely becomes a problem, so there is no problem, but if it becomes a problem, the longitudinal direction drive actuator 17 can be divided into left and right parts and be independent.

Increasing the compliance of the anti-vibration rubber 6, spring, etc. between the guide shoes 7.8 of the elevator and the car, and lowering the spring constant means that the inclination of the car against eccentric loads increases. This eccentric load is greatest when the car is stopped on the floor and the cart is boarded. Additionally, the horizontal vibration of the car due to the horizontal excitation force during boarding increases due to the increase in compliance. To deal with this, it is sufficient to lower the virtual compliance of the actuator in high-speed driving zones. Particularly when stopping on a floor and boarding the vehicle, it is best to completely stop the actuator by braking and put it in a low compliance state. According to the configuration of this embodiment, since the actuators 17 and 20 are provided, these control conditions can be easily switched. The installation of the guide rail 9 is based on errors, and the impact received from the guide rail 9 appears regularly and repeatedly at the same position during lifting and lowering operations, so the actuator should be trained in advance to perform actions to cancel out this impact. The learning control system can be easily realized with the configuration of this embodiment.

In the description of this embodiment, guide shoes 7.8 are provided on both the upper and lower sides of the car, but it is also possible to provide them on only one of the upper and lower sides, and although the effect will be reduced, a certain effect can still be achieved. Also, when installing the actuator,
The same effect can be obtained even if it is attached to the connecting frame side instead of the car side. Furthermore, in the above embodiment, the guide shoes 7 and 8 are connected by the connecting frames 11 and 12, but in high-speed elevators, guide rollers are often used instead of guide shoes, so in the end, a pair of these is formed. Any configuration may be used as long as the rail engagement pieces are connected by the connection frame 11, 12.

[Effects of the Invention] As explained above, in the present invention, since an actuator for driving in the horizontal direction is provided between the rail engager and the car, the left and right rail engagers are connected by a connecting frame to maintain a constant interval. No matter what kind of positional control the actuator performs, a car derailment accident will not occur, and since the number of actuators can be reduced, the entire system including the control device can be configured economically.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main part of the upper part of an elevator according to an embodiment of the present invention, and FIG. 2 is a schematic front view of the entire elevator shown in FIG. 1. 7...Upper guide shoe, 8...Lower guide shoe, 9...Rail, 11...Disconnected frame, 12...Disconnected Frame, 17... Actuator for upper front-back direction drive, 20... Actuator for upper left-right drive. Figure 2

Claims (1)

[Claims] 1. It has two guide rails laid almost vertically and rail engagers provided on the top, bottom, left and right sides of the car to engage with the guide rails, and guides the car in the vertical direction along the guide rails. An elevator characterized in that the left and right rail engagers are connected by a connecting frame, and an actuator is provided to drive the connecting frame in a horizontal direction.