JPS6116714B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes two pulleys that are rotatably supported at a distance from each other at the bottom of a car, and drives a hanging rope that is wound around the two pulleys. This invention relates to an emergency stop device for a rope-lifting elevator that raises and lowers a car.

Generally, this kind of rope-lifting elevator is constructed as shown in FIG. That is, the car 2 is arranged in the hoistway 1, and the rail guide 3 provided on the car 2 is connected to the guide rail 4 in the hoistway 1.
By engaging with A and 4B, the car 2 can be raised and lowered. Also, there are 2 under the floor of car 2.
Two pulleys 5A, 5B are installed at separate positions, and a rope 6 is wound between these two pulleys 5A, 5B. One end of this rope 6 is fixed to a fixed beam 7 fixed above the hoistway 1,
The other end is fixed to a part of the jack stand 10 at the bottom of the hoistway via a drive pulley 9 provided at the tip of the hydraulic jack 8.

In such a configuration, the hydraulic jack 8
When driving the car 2, the guide rail 4A,
You will be guided up and down by 4B.

On the other hand, as an emergency stop mechanism for the rope-lifting elevator, a speed governor 11 is provided at the upper part of the hoistway 1, and a governor rope 12 with a tension wheel 13 hanging from the lower part is wound around the speed governor 11. The governor rope 12 is connected to an operating lever 15 protruding from the car 2. This operating lever 15 is movably supported by a shaft 14A, and the lever 1 located on the opposite side via a connecting rod 16
It is connected to 7. 14B is a shaft that movably supports this lever 17. Both levers 1
Pulling rods 18A and 18B are suspended from 5 and 17, and the guide rail 4 is attached to the tips of the pulling rods 18A and 18B.
A catch roller (not shown) is connected between the bodies 19A and 19B on the side of the cage.

In this configuration, abnormal speed of the car 2 is detected by the speed governor 11, and the governor rope 12 is held. As a result, the governor rope 12 is moved to the operating lever 15.
is driven, the lifting rods 18A and 18B are pulled up, the catch roller is wedged between the guide rail and the body, and the movement of the car is stopped.

According to such an emergency stop mechanism, the speed governor 11
The installation position is at the top of the hoistway 1, and as a result, the top dimension of the hoistway has to be increased, and an inspection window 20 is required for maintenance and inspection of the speed governor 11. The disadvantage was that it was troublesome and the construction cost increased.

It is an object of the present invention to eliminate the drawbacks of the prior art described above, to reduce the construction cost of a hoistway, to easily apply it to various passenger car specifications, and to provide an emergency stop device for an elevator with a rope lifting type that has a fast operating speed. It is on offer.

To achieve this object, the present invention includes an actuation lever whose one end is rotatably supported at the bottom of the car, a detection roller rotatably attached to an intermediate portion of the actuation lever, and a detection roller rotatably attached to the middle of the actuation lever. an elastic pressing member that presses the other end downward to press the detection roller against the rope that spans between the two pulleys; and a rotating shaft that is arranged at the bottom of the car so as to be substantially orthogonal to the operating lever. , a first connecting member connecting the rotating shaft and the other end of the operating lever, and a second connecting member connecting the rotating shaft and the emergency stop wedge member, and When the lever becomes loose or breaks, the actuating lever rotates downward, rotates the rotation shaft, activates the emergency stop wedge member, and brings the car to an emergency stop in cooperation with the guide rail. It is characterized by having been configured.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 7. In these figures, the same reference numerals as in FIG. 1 indicate the same or equivalent parts.

In this embodiment, a rope 6 is stretched through two pulleys 5A and 5B attached at a predetermined distance from each other at the bottom of the car 2. As shown in FIG. A tension detection device 21 is installed at the bottom of the car 2 opposite to the rope 6 stretched on the car.

As shown in FIGS. 3 and 4, this tension detection device 21 includes a bracket 22 fixed to the lower part of the car 2, and one end of which is rotatably supported by the bracket 22 about a fulcrum 23. a compression spring 25 inserted between the other end of the lever 24 and the bracket 22; 6 and a detection roller 26 that is pressed into contact with the detection roller 26.

On the other hand, above the bracket 22, a rotating shaft 27 is arranged so as to be substantially orthogonal to the lever 24, and a lever 28 is fixed to the substantially central part of the rotating shaft 27. A tension spring 29 is stretched between them, and a rod 30 is pivotally connected to the other end. This rod 30
extends downward through the bracket 22, and is attached to the lever 24 with a nut 31 attached to its lower end.
is engaged with the other end. Further, one end of levers 32A, 32B is fixed to both ends of the rotating shaft 27 that protrude outward from under the floor of the car, and the other end of these levers 32A, 32B is fixed to the other ends of the levers 32A, 32B. Rods 33A, 33 with one end pivotally attached to
Catching rollers 35A and 35B, which together with the bodies 19A and 19B constitute emergency stop wedge members 34A and 34B, are connected via B. In addition, 3
A stopper 6 restricts the upward rotation of the operating lever 24, and is screwed onto the bracket 22 so that its vertical position can be adjusted.

The emergency stop device configured in this way is in the state shown in Figures 2 to 4 during steady operation of the elevator, but for some reason the rope 6 suspending the car 2 becomes slack or breaks. In this case, the two pulleys 5A and 5 on the lower side of the car 2
The tension of the rope 6 between B decreases, and therefore the pressing force of the compression spring 25, the detection roller 26 and the lever 2
The detection roller 26 is pushed down in the direction of arrow a by its own weight. As a result, the lever 24 is rotated about the fulcrum 23 in the direction of the arrow b, and the rod 30 engaged therewith is pulled down in the direction of the arrow c, and the lever 27 and the lever are fixed together. 28, 32A, and 32B are rotated in the direction of arrow d. Therefore, the rods 33A, 33B are pulled up in the direction of arrow e, and the catch rollers 35A, 35
B is moved from the wide side of the wedge-shaped gap of the bodies 19A, 19B to the narrow side, and as the car 2 descends, the catch rollers 35A, 35B are moved between the guide rails 4A, 4B and the inclined surfaces of the bodies 19A, 19B. This prevents the car from digging in and further lowering the car 2.

As described above, according to this embodiment, it is possible to detect abnormal slack or breakage of the rope and safely stop the descent of the car without using a speed governor. This eliminates the hassle of constructing a hoistway and the increased construction costs caused by installing a speed governor. That is,
Since there is no need to secure space for installing the speed governor,
This makes it easier to design the hoistway and makes it smaller in size.As a result, it is possible to provide a hoistway with a low top height, thereby reducing construction costs and solving the problem of sunlight rights.

Furthermore, in this embodiment, since the above-mentioned specific structure is used as the interlocking mechanism between the tension detection device 21 and the emergency stop wedge members 34A and 34B, even if the specifications of the car 2 change, the rotation is simple. By simply changing the length of the moving shaft 27, the other parts can be applied as they are, and therefore can be easily applied to cars with various specifications.

Further, this type of emergency stop device is required from the viewpoint of safety that its operating time be as short as possible, and the present embodiment is effective in meeting such requirements as described below.

FIG. 5 is an explanatory diagram modeling the emergency stop device of this embodiment. As mentioned above, an abnormality in the tension of the rope 6 is detected as the displacement x of the detection roller 26, and this displacement speed x is determined by the pressing force of the compression spring 25, etc. Due to the interlocking mechanisms such as the lever 32 and the rod 33, the lifting speed y of the catch roller 35 is expressed by the following equation.

y=l ₂ /l ₁ ×l ₄ /l ₃ However, l ₁ is the distance between the fulcrum 23 and the pressure contact point of the detection roller 26, and l ₂ is the distance between the fulcrum 23 and the pressing point of the compression spring 25. Distance, l ₃ is rod 30 and lever 2
8 is the distance between the pivot point of the pivot shaft 27 and the pivot point of the pivot shaft 27, and _l4 is the distance between the pivot point of the pivot shaft 27 and the pivot point of the lever 32 and the lever 33. .

That is, by selecting the ratio of l ₁ and l ₂ and the ratio of l ₃ and l ₄ to be larger than 1, the lifting speed y of the catch roller 35 is made larger than the displacement speed x of the detection roller 26, and the car 2 It is possible to stop the car in a very short time and suppress abnormal speed increase of the car 2.

By the way, in a device like this embodiment in which abnormal slack or breakage of the rope is detected using a detection roller that is always elastically pressed against the rope, the emergency stop is detected due to the balance between the tension of the rope and the pressing force of the detection roller. Keeping equipment inactive. Therefore, when the load inside the car changes and the car moves up and down, the tension of the rope changes and the position of the detection roller also changes. If this is not prevented, the emergency stop device may malfunction. There is a risk.

The stopper 36 of this embodiment is provided to prevent such malfunction, and its effect can be seen in the sixth example.
The diagram will be explained.

If the vertical movement of the car due to a change in live load is given in a sinusoidal manner with respect to the reference position _S0 , as shown by curve S in Figure 6a, for example, then the tension in the rope is as shown by curve T in Figure 6b. As shown, the curve S changes into a sinusoidal waveform with the wave head and wave bottom positions reversed, and the lower end of the compression spring 25 from the bracket 22, that is, the position h of the pressing point of the lever 24, is If there is no stopper 36, as shown by curve _h1 ,
It changes in a sinusoidal manner similar to the curve S with respect to the reference position h ₀ at the time of equilibrium. However, the reference position h ₀ at equilibrium
Place the stopper 3 so that it touches the top surface of the lever 24 located at
6, even if the tension T changes in a sinusoidal manner, the lever 36 is restricted from moving above the reference position _h0 , and the change in the pressing point position h is as shown by the curve _h2 in FIG. 6c. Only in one direction. In addition, stopper 3
Move the lever 24 downward to the reference position.
By pushing down by δ below h ₀ , if an initial deflection is given to the rope that exceeds the range of displacement of the rope due to changes in the carrying load of the car, the tension T will change within a range that does not exceed this initial deflection. However, the pressing point position h does not change and remains constant, as shown by the straight line _h3 in FIG. 6d. That is, even if the carrying load of the car changes and the car moves up and down, the position of the detection roller does not change, eliminating the risk of the emergency stop device malfunctioning, and improving its reliability.

As explained above, according to the present invention, abnormal slack or breakage of the rope can be detected and the descent of the car can be safely stopped without the need for a conventional speed governor. The hoistway can be designed and constructed without considering the installation of the hoistway, and the construction cost can be reduced. Moreover, even if the specifications of the car change, it is only necessary to change the length of the rotating shaft, so it can be applied commonly to cars of various specifications, and the operation speed can be increased to improve the car's performance. Abnormal speed increase can also be suppressed.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional emergency stop device for a rope lift type elevator, FIG. 2 is a schematic front view showing an emergency stop device for a rope lift type elevator according to an embodiment of the present invention, and FIG. is the second
Figure 4 is an enlarged front view of section P in Figure 2. Figure 5 is an explanatory diagram modeling the emergency stop device shown in Figures 3 and 4. Figure 6 a. ~d
is a characteristic diagram for explaining the malfunction prevention function of the stopper. 2... Car, 4A, 4B... Guide rail, 5
A, 5B... Pulley, 6... Rope, 21... Tension detection device, 24... Operating lever, 25... Compression spring, 26
...detection roller, 27...rotation shaft, 28, 32A, 3
2B... Lever, 30, 33A, 33B... Rod,
34A, 34B...Emergency stop wedge member, 36...Stopper.

Claims (1)

[Claims] 1. A car guided by a guide rail installed in a hoistway, an emergency stop wedge member provided at a position facing the guide rail of the car, and a lower part of the car. A rope comprising two pulleys rotatably supported at a distance from each other, a rope wrapped around the two pulleys, and a drive device that drives the rope to raise and lower the car. In a lift-up elevator, an operating lever having one end rotatably supported at the bottom of the car, a detection roller rotatably attached to an intermediate portion of the operating lever, and the other end of the operating lever. an elastic pressing member that presses the detection roller downward to press the detection roller against a rope spanning between the two pulleys;
a rotating shaft disposed at a lower part of the car so as to be substantially orthogonal to the operating lever; a first connecting member connecting the rotating shaft and the other end of the operating lever; An emergency stop device for a rope-lift elevator, characterized in that a second connecting member is provided that connects the moving shaft and the emergency stop wedge member. 2. In claim 1, the first connecting member includes a lever whose one end side is fixed to an intermediate portion of the rotation shaft, and whose one end side is pivotally connected to the other end side of the lever, and the other end side is connected to the lever. and a rod that engages with the other end of the actuating lever, and the second connecting member includes:
It consists of levers with one end fixed to both ends of the rotating shaft, and rods with one end pivotally attached to the other end of these levers and the other end engaging with the emergency stop wedge member. An emergency stop device for rope-lifting elevators. 3. A car guided by a guide rail installed in the hoistway, an emergency stop wedge member provided at a position facing the guide rail of the car, and a rotating wedge member provided at a distance from the bottom of the car. In a rope-lifting elevator comprising two freely supported pulleys, a rope wrapped around the pulleys, and a drive device that drives the rope to raise and lower the car, one end part includes an actuation lever rotatably supported at the bottom of the car, a detection roller rotatably attached to the middle of the actuation lever, and a detection roller that presses the other end of the actuation lever downward. an elastic pressing member that presses the roller against the rope straddled between the two pulleys; a rotating shaft disposed at the bottom of the car so as to be substantially orthogonal to the operating lever; and a rotating shaft and the operating lever. A first connecting member that connects the other end of the lever, a second connecting member that connects the pivot shaft and the emergency stop wedge member, and a second connecting member that connects the lever to the other end thereof; An emergency stop device for a rope-lifting elevator, characterized in that it is provided with a stopper for preventing malfunction to restrict movement. 3. The emergency stop device for a rope-lifting elevator according to claim 3, wherein the malfunction prevention stopper is adjustable in its vertical position.