JPH0133574Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an elevator emergency stop device for preventing an elevator car or a lifting object such as a counterweight from falling at an abnormal speed.
Especially regarding improvements to the roller and lever.

[Prior art]

First, a general elevator emergency stop device disclosed in Japanese Utility Model Application Publication No. 121452/1983 will be explained with reference to FIG.

A car 1, which is an example of an elevating body, is suspended from a rope 2, and a counterweight (not shown) is attached to the other end of the rope 2. The car 1 is guided along a guide rail 3 extending vertically within a hoistway (not shown). A gripper 4 is protruded from the lower end of the car 1, and the gripper 4 has an inclined surface 4a facing the side surface 3a of the guide rail 3 so as to approach the side surface 3a upward. is provided. A roller 5 held at the tip of a lever connected to a governor rope (not shown) faces between the side surface 3a of the guide rail 3 and the inclined surface 4a of the grip fitting 4.

According to such a configuration, when the descending speed of the car 1 becomes excessive and exceeds a specified value, the governor (not shown) operates and grips the governor rope. However, since the car 1 continues to descend, a lever (not shown) connected to the governor rope rotates, and the roller 5 is caught between the side surface 3a of the guide rail 3 and the inclined surface 4a of the gripper 4. The car 1 stops rapidly due to the large resistance force generated at this time.

By the way, in recent years, in buildings with small floor areas and low floors, which have been increasing in urban areas, elevators are often becoming smaller, and in such small elevators, the car 1 itself is also smaller. When car 1 is brought to an emergency stop by Roller 5, the stop shock applied to car 1 is large, posing a safety problem for passengers.

In order to eliminate such problems in the conventional one, the one shown in FIG. 13 has already been proposed. Small diameter portion 5a that does not come into contact with the inclined surface 4a of the metal fitting 4
, which reduces frictional force. In this case, by reducing this frictional force, the shock to the car 1 during an emergency stop can be alleviated.

However, in this prior application, there is a problem with the safety of holding the roller by the lever.

[Summary of the idea]

In view of these points, the present invention forms a small diameter part in the axially intermediate position of the roller that does not come into contact with the side surface of the guide rail and the inclined surface of the gripper, and also provides a protrusion on the lever that fits into this small diameter part. By providing a protruding structure, the elevating object can be stopped reliably in an emergency.
Moreover, it is an object of the present invention to provide an emergency stop device for an elevator that can alleviate the shock to a car.

[Example of idea]

The present invention will be explained below with reference to embodiments shown in the drawings. Note that the same components as those of the conventional device described above are denoted by the same reference numerals in the drawings, and the explanation thereof will be omitted.

1 to 3 show an embodiment of the present invention, in which the tip of a lever 7, which is rotatably fixed to a shaft 6 and connected to a governor rope (not shown) at an intermediate portion, is connected to a roller 5. It has a holding part 8 that is bent 90 degrees in the direction. The holding portion 8 has a C-shape as a whole, and tip protrusions 8a, 8a of the holding portion 8, which are vertically opposed to each other, are loosely fitted into the small diameter portion 5a of the roller 5.

According to such a configuration, the holding portion 8 of the lever 7
Since both end projections 8a, 8a are loosely fitted into the small diameter portion 5a of the roller 5 from above and below to hold the roller 5, the followability of the roller 5 with respect to the rotation of the lever 7 is good. Moreover, the roller 5 does not fall off from the lever 7.

Therefore, it can operate reliably as an emergency stop device for an elevator, and even in the case of a small elevator, the shock to the car (not shown) can be small.

4 and 5 show a second embodiment of the present invention, in which approximately the small diameter portion 5a of the roller 5 is located between the protrusions 8a and 8a at both ends of the holding portion 8 of the lever 7.
A stopper 9 made of a coil spring is provided along a range of 180° to abut against this small diameter portion 5a.
Both ends of this stopper 9 are fixed to tip protrusions 8a, respectively.

According to such a configuration, when the lever 7 is returned after an emergency stop, the roller 5 can always move along the inclined surface 4a of the gripper fitting 4, and the roller 5
are the side surface 3a of the guide rail 8 and the gripping metal fitting 4.
It is possible to prevent the vehicle from being caught between the inclined surfaces 4a of the vehicle, thereby increasing safety.

Note that instead of the coil spring-shaped stopper 9 described above, as shown in FIGS.
It may be fixed to the distal end protrusion 8a.

Further, as shown in FIGS. 8 and 9, a stopper 9b may be protruded in a cantilever shape from one tip end projection 8a, and furthermore, as shown in FIGS.
As shown in the figure, arcuate stoppers 9c, 9c may be integrally provided on both end protrusions 8a, 8a.

[Effect of idea]

As explained above, the emergency stop device for an elevator according to the present invention has a small diameter portion formed in the axially intermediate position of the roller that does not come into contact with the side surface of the guide rail and the sloped surface of the gripper, and the lever has this small diameter portion. Since the projecting portion that fits into the cage is provided, the elevating body can be reliably raised and lowered in an emergency, and the shock to the car can be alleviated, which is a practical effect.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the emergency stop device for an elevator according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a cross-sectional view taken along the - line of Fig. 2, Fig. 5, 6 and 7, 8 and 9, 10 and 11 are front and right views of main parts showing other embodiments of the present invention, respectively; The figure is a schematic front view showing a general elevator emergency stop device, and FIG. 13 is a plan view showing the elevator emergency stop device of the prior application. 1... Car, 3... Guide rail, 4...
Grip fitting, 5...roller, 7...lever, 8...
Holding part, 8a, 8a... Tip protrusion, 9, 9a, 9
b, 9c...Stoppers. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) Lifting and lowering of a gripper, which is provided with an inclined surface facing upwardly and approaching the side surface of an upright guide rail, guided along the guide rail. In an emergency stop device for an elevator, a roller held at the tip of a lever connected to a governor rope is installed on the elevator body and is exposed between the side surface of the guide rail and the inclined surface of the grip fitting, in which the roller is axially intermediate. An emergency stop for an elevator, characterized in that a small diameter part is formed at the position of the guide rail so that it does not come into contact with the side surface of the guide rail and the inclined surface of the gripper, and the lever is provided with a projecting part that fits into the small diameter part. Device. (2) The emergency stop device for an elevator according to claim 1, wherein the protrusion of the lever is provided with a stopper for holding the small diameter portion of the roller.