JPH0438672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for gripping a guide rail of an elevator car to make an emergency stop in the event of an emergency.

[Conventional technology]

Figures 2 and 3 are diagrams showing the conventional emergency stop device for elevators disclosed in, for example, Japanese Utility Model Application No. 56-135972. Figure 2 is a front view of the elevating body, and Figure 3 is an enlarged view of the main parts. It is a diagram.

In the figure, 1 is a guide rail installed in the hoistway,
2 is an elevating body, 3 is a frame fixed to the lower part of the elevating body, 4 is a guide shoe provided on the elevating body 2 and engages with the guide rail 1 to guide the elevating body 2, and 5 is a machine room above the hoisting path. A speed governor rope 6 is wrapped around a speed governor (not shown) installed in the hoistway and hung down into the hoistway.
A biasing body 7 formed in a letter shape is housed in the biasing body 6 so as to be movable laterally, and has a vertical surface facing the inner surface of the biasing body 6 on one side and a guide rail on the other side. A pressing body is formed with an inclined surface that spreads downward from the side surface of the pressing body, and there are spaces 7 at the upper and lower ends of the pressing body.
a is provided and engages with a blocking body 8 press-fitted into the frame body 3. 9 is a clamping plate inserted between the vertical surface of the pressing body 7 and the inner surface of the urging body 6; 10 is a roller device provided along the inclined surface of the pressing body 7; and 11 is a roller device that is normally placed in a lowered position; The roller device 1 is provided between the roller device 10 and the side surface of the guide rail 1, and the roller device 1 is provided on one side.
A wedge body 12 is connected to the wedge body 11 and has a speed regulating member at one end. This is an operating mechanism that grips the machine rope 5 and operates when necessary.

The conventional elevator emergency stop device is constructed as described above, and the wedge body 11 is normally in the lowered position as shown in FIG. The elevating body 2 moves up and down in the hanging state. Along with this, the speed governor rope 5
It also goes up and down.

During the descent of the elevating body 2, if overspeed occurs for some reason and exceeds a predetermined value, the speed governor is activated and grips the speed governor rope 5. However, since the elevating body 2 continues to descend, the wedge body 11 is guided by the roller device 10 and moves upward via the operating mechanism 12 via the operating link mechanism. Due to the action of the inclined surface of the pressing body 7 and the inclined surface of the wedge body 11, the wedge body 11 moves toward the guide rail 1, and the gap between the vertical surface of the wedge body 11 and the side surface of the guide rail 1 gradually becomes smaller. Eventually they come into contact with each other. When the wedge body 11 moves further upward, the pressing body 7 is pushed outward via the roller device 10.
In this way, the pressing body 7 moves in the direction of pushing and spreading the biasing body 6 within the space 7a, so that the biasing body 6 generates a compressive force, and the wedge body 1
1 is pressed and slid against the side surface of the guide rail 1 to stop and grip the elevating body 2. The clamping plate 9 applies an initial compressive force to the biasing body 6.

[Problem that the invention seeks to solve]

In the conventional elevator emergency stop device as described above, an initial compressive force must be applied to the biasing body 6 in advance by a clamping plate so that the pressing body 7 generates a predetermined compressive force. However, since the biasing body 6 has variations in dimensional accuracy and spring constant, each product is inspected at the factory to account for this variation, and a clamping plate 9 is inserted as necessary to ensure that the predetermined compressive force is obtained. It takes a considerable amount of time to make adjustments. In addition, the frame 3 has a thin portion due to the groove for press-fitting the blocking body 8.
In order to ensure strength, the wall must be thick, resulting in problems such as increased material cost and weight.

This invention was made to solve the above-mentioned problems, and eliminates the need to adjust the initial compression force using a clamping plate, etc., making assembly and adjustment work easier, and eliminating variations in the performance of individual products due to adjustment. The purpose of the present invention is to provide an emergency stop device for elevators that enables the safety of elevators.

[Means for solving problems]

In the emergency stop device for an elevator according to the present invention, a biasing body is inserted between a frame fixed to an elevating body and a pressing body housed in this frame, and a stepped bolt is pushed from the frame side to the pressing body. The distance between the frame body and the pressing body is regulated to a constant value by screwing into the frame body.

[Effect]

In this invention, since the distance between the frame body and the biasing body is regulated to a constant value by the step bolt,
The compression length of the biasing body is constant, and a constant initial compression force is applied to the pressing body.

〔Example〕

FIG. 1 is an enlarged view of essential parts showing an embodiment of the present invention, in which numerals 1 to 3, 5, 7, and 10 to 12 are similar to the conventional apparatus described above.

In FIG. 1, reference numeral 14 denotes a stepped bolt screwed into the pressing body 7 through a bolt hole drilled in the frame body 3;
Reference numeral 5 denotes a biasing body provided between the frame body 3 and the pressing body 7 and consisting of a pressing spring fitted into the stepped bolt 14.

In the elevator emergency stop device configured as described above, the stepped bolt 14 is screwed into the pressing body 7, so the pressing body 7 can freely move outward and cannot move inward. It is limited by the head of the stepped bolt 14. The stepped bolt 14 is a biasing body 15
Since there is a shaft portion of a predetermined length so as to obtain a predetermined initial compression force, the pressing body 7
The distance between the frame body 3 and the pressing body 7 when in the position limited by the head of the frame body 3 is regulated to a constant value. Therefore, the shoulder bolt 14 is pushed through the biasing body 15 from the frame body 3 side.
If the stepped bolt 14 is screwed into the pressing body 7 through the bolt 14 and tightened until the stepped portion of the stepped bolt 14 comes into contact with the vertical surface of the pressing body 7, the initial compression force will be automatically obtained. That is, it is not necessary to insert and adjust the clamping plate 9 to obtain the initial compression force in the conventional device. Further, the space in the pressing body 7 and the blocking body 8 in the frame body 3, which were conventionally necessary, are no longer necessary, and the number of parts and difficult machining are reduced.

In the above embodiment, a pressure spring is used as the biasing body 15, but a stacked disc spring with a hole provided in the center may also be used.

〔Effect of the invention〕

As explained above, in this invention, a biasing body is inserted between a frame fixed to an elevator elevating body and a pressing body housed in this frame, and a step bolt is screwed into the pressing body from the frame side. So, I decided to restrict the distance between the frame and the pressing body to a certain value, so
The initial compression force of the pressing body is held constant, eliminating the need to adjust the initial compression force using a clamping plate, etc., making assembly and adjustment work easier, and eliminating variations in the performance of individual products due to adjustment. effective.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the emergency stop device for an elevator according to the present invention, an enlarged cross-sectional view taken along the line - in FIG. 2, and FIG. FIG. 3 is an enlarged cross-sectional view taken along the - line in FIG. 2. In the figure, 1 is a guide rail, 2 is an elevating body, 3 is a frame body, 7 is a pressing body, 10 is a roller device, 11 is a wedge body, 14 is a shoulder bolt, and 15 is a biasing body.
Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A guide rail erected in the hoistway, a frame fixed to the elevating body arranged in the hoist, and a frame body movably housed in the horizontal direction and connected to the guide rail. a pressing body with inclined surfaces formed on opposing surfaces;
A roller device is provided in contact with the above-mentioned inclined surface of this pressing body and is normally placed in a lowered position; one side is in contact with the above-mentioned roller device and is normally in a lowered position, and the other side maintains a gap with the surface of the guide rail. a wedge body that rises when activated and is inserted between the guide rail and the roller device; a wedge body that is inserted between the frame body and the pressing body to press the pressing body toward the guide rail; and a stepped bolt that is screwed into the pressing body from the frame side and regulates the distance between the frame and the pressing body to a constant value with its head in contact with the frame. An emergency stop device for elevators. 2. The emergency stop device for an elevator according to claim 1, wherein the biasing body is a coil spring. 3. The emergency stop device for an elevator according to claim 1, wherein the biasing body is a laminated disc spring.