JP2002241064A - Safety device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upwardly-acting emergency stopping device for an elevator. SOLUTION: This upwardly-acting emergency stopping device for an elevator is provided with a holding tool of a roller for guiding a clamp, the roller 13 is held by a projecting part 12a of the holding tool 12 before the emergency stopping device is operated, and in the abnormality of the pushed-up motion of a car 1, the clamp 10 is restricted by a safety link mechanism, a step 14 and a bracket 11 are raised synchronously with the car, and the clamp 10 is guided by the roller 13 and relatively lowered with the holding tool 12, whereby a guide rail 12 is held and the car is stopped at the place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator, and more particularly to an emergency stop device.

[0002]

2. Description of the Related Art FIG. 2 is a view showing the entirety of an emergency stop device which is one of safety devices for an elevator. If the main rope 2 suspending the elevator car 1 is broken, the speed control is performed. The safety device including the machine 3, the governor rope 4, the lever mechanism 5, the safety link mechanism 6, and the safety gear 7 operates.

[0003] That is, when the speed of the car 1 decreases, when the speed exceeds a certain specified speed, the governor 3 first restrains the governor rope 4 at the P portion. Then, the restraining force is transmitted to the emergency stop 7 via the lever mechanism 5 and the safety link mechanism 6, and the emergency stop 7 operates.

FIG. 3 is a partially enlarged view of the safety gear 7 of FIG. 2, FIG. 3 (a) is a front view, and FIG. 3 (b) is a plan view.
The wedge-shaped clamp 10 is restrained by a safety link mechanism 6 connected thereto, while the bracket 11 is
As a result, the left and right clamps 10 sandwich the guide rail 12 located in the middle, thereby preventing the car 1 from falling.

[0005] A plurality of rollers 11a are disposed in a portion of the bracket 11 facing the clamp 10, and the rotation of the rollers 11a allows the clamp 10 to move smoothly, thereby providing an emergency stop device. It works reliably. Such a device is intended to prevent the car 1 from falling until it gets tired.

However, recently in Europe, elevator standards E
The installation of a good safety device has become mandatory as N81.

A good safety device prevents an accident in which, for example, the empty car 1 rises due to an unbalanced load and collides with the top of the hoistway when the brake of the hoisting machine is out of order. It is a device.

[0008]

Such a good safety device has a sufficient support for the roller which plays an important role simply by arranging the conventional safety device upside down as shown in FIG. 4, for example. It was not possible to construct an appropriate safety device.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has as its object to provide a well-functioning emergency stop device.

[0010]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for restraining a rope with a speed governor to relatively move a clamp through a link mechanism to operate an emergency stop. The facing member is provided with a circulating roller device. 2. The clamp is provided with a holder for holding a roller in contact with the clamp. Things.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a safety device having a structure for appropriately supporting a roller for guiding an emergency stop clamp.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view showing one embodiment of the present invention,
FIG. 5 is an enlarged view of the right-handed emergency stop in FIG. 1 (the right half shows a state before operation, and the left half shows a state after operation).
The lower part of FIG. 1 shows the conventional lowering safety device, and the upper part shows the uppering safety device according to the present invention. (The explanation of the lower hand emergency stop device is the same as the conventional device, so it is omitted.)

In the figures, the same reference numerals as those in FIGS. 2, 3 and 4 indicate the same or the same functions.
5 'is a lever mechanism of a good safety device, 6' is a safety link mechanism of a good safety device, 7 'is a safety device of a good safety device, and 8 and 8' are even if the car 1 vibrates slightly. A spring for preventing the emergency stops 7, 7 'from operating, 12 is a holder provided on the clamp 10, 1
Reference numeral 3 denotes a roller according to the present invention, which is rotatably and movably disposed between the bracket 11 provided on the step 14 and the clamp 10. Then, the projection 12a of the holder 12
Thus, the rollers 13 are supported so as not to fall. 1
Reference numeral 5 denotes a hole in the plate 16, which has a function as a through hole when the holder 12 is moved.

In other words, before the operation of the superior emergency stop device, the roller 13 is held by the projection 12a of the holder 12, and when the car 1 is in an abnormal state in which the raising operation is performed,
When the clamp 10 is restrained by the safety link mechanism 6 ′ and the step 14 and the bracket 11 rise in synchronization with the car 1, the clamp 10 is guided by the rollers 13 and relatively lowers together with the holder 12, and sandwiches the guide rail 12. Car 1 is stopped in place.

Next, another embodiment of the present invention will be described. FIG. 6 is a view showing another embodiment of the present invention, and FIG.
FIG. 7 is a partially enlarged view of FIG.

In the drawing, the same reference numerals as those in FIG. 1 denote the same components, but reference numeral 20 denotes a circulating roller device according to the present embodiment. That is, since the rollers 21 corresponding to the rollers 11a are configured to circulate in the case 22, the case 2
2 only needs to be fixed to step 14. At the time of operation of the safety device, the structure is such that the load is applied not only to the roller alone but to a plurality of rollers as a whole. Therefore, even if a large load is received, the safety device has sufficient durability. In the case of this circulating roller device 20, it can be applied to a conventional low-handed emergency stop device. In any of the embodiments, the rollers and rollers, which are essential for the safety device, are appropriately supported and guided.

[0017]

As described above, according to the present invention, it is possible to obtain a safety device which functions sufficiently even when applied to a good safety device.

[Brief description of the drawings]

FIG. 1 is an overall view showing one embodiment of the present invention.

FIG. 2 is an overall view of a conventional elevator safety device.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is an explanatory diagram for explaining a problem of the conventional device.

FIG. 5 is an enlarged view of an emergency stop 7 'in FIG.

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a partially enlarged view of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevator car 3 Governor 4 Governor rope 5, 5 'Lever mechanism 6, 6' Safety link mechanism 7, 7 'Emergency stop 10 Clamp 11a Roller 12 Holder 20 Circulation roller device 21 Roller

Claims (4)

[Claims] 1. A device in which a clamp is relatively moved via a link mechanism by restraining a rope with a speed governor and an emergency stop is actuated. In a member facing the clamp, a circulating roller device is provided. A safety device for an elevator, comprising: 2. A device in which a clamp is relatively moved via a link mechanism by restraining a rope with a speed governor, and an emergency stop is actuated. The clamp holds a roller in contact with the clamp. An elevator safety device comprising a holding tool. 3. The elevator safety device according to claim 2, wherein the holding tool moves in synchronization with the clamp. 4. The elevator safety device according to claim 3, wherein a through hole is provided at a destination of the holding tool.