JPH01299179A - Device for emergency stop of elevator - Google Patents

Abstract

PURPOSE:To obtain a large-capacity elevator without increasing a braking mechanism under the floor of a cage and reduce a lifting up/down point pit space by installing plural sets of braking mechanisms on a lifting up/down body and mutually linking the operating levers of the braking mechanisms with a longitudinally expandable/contractible linking rod. CONSTITUTION:In the emergency stop device of an elevator, since upper and lower braking mechanisms 25A, 25B are linked with a linking rod 32, as an upper lever 9 is rotated by holding a governor rope 10, a lower lever 9 is also rotated to simultaneously operate the upper and lower braking mechanisms 25A, 25B. Hence, the upper and lower braking mechanisms 25A, 25B may have a braking capacity merely half that of the conventional braking mechanism 25 and can be miniaturized, reducing the space under the floor 5 of a cage. In this case, the linking rod 32 adjusts the timing for upper and lower sliding pieces 16, 17 to be pressed by guide rails 6 so as to agree, while being adjustable by a right-handed screw 32a, a left-handed screw 32b and nuts 33, 34. Also, the timing for the right and left sliding pieces 16, 17 to be pressed by the guide rails 6 is also adjustable by means of links 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for pressing a slider against a guide rail of an elevator to bring an elevator to an emergency stop.

[Conventional technology]

4 and 5 are diagrams showing a conventional elevator emergency stop device disclosed in, for example, Japanese Utility Model Publication No. 54-8529. FIG. 4 is a front view, and FIG. department)
It is.

In the figure, (1) is a heel frame, consisting of a column (2), an upper frame (3) that connects the top of the column (2), and a lower frame (4) that connects the bottom of the column (2). There is. (5) is the car floor supported by the lower frame (4).

(6) is a guide rail installed vertically in the hoistway, (7) is a guide rail (6) attached to the upper frame (3) and lower frame (4).
The guide shoe (8) is guided by a shaft pivoted on the lower frame (4).

A lever (9) is fixed to one end, and the tip of the lever (9) is connected to a governor rope tl (I).The governor rope αO is connected to a governor (not shown) installed in the machine room. When activated, it is gripped by this and fixed in space. αυ is also a shaft pivotally supported by the lower frame (4).

Lever (IX5) is fixed to one end, and lever (9) and lever 0 are connected by link 0.14, (IF
5 is an actuation lever ae whose one end is fixed to the shaft (8) and the shaft αυ, respectively.

The lower end of αη is pivotally connected to the other end of the operating lever 〇 and α9, respectively, and a sliding movement is formed on one side facing the guide surface of the guide rail (6) with a gap in between, and the other side is formed as it goes upward. A slider, α Enoki, is formed with an inclined surface that slopes toward the guide surface of the guide rail (6).

(1'J is a suppressor whose one side has an inclined surface substantially parallel to the inclined surfaces of the sliders H and (lη), and is arranged so that it can move in the left and right directions in Fig. 5 within the lower frame (4). ing.

(1) is a pressing body or a roller disposed between the inclined surfaces of α9 and sliders αe and αη, and D is formed in a σ shape, and its end part holds the pressing bodies all and (11) from the outside. It is a leaf spring.

Note that (81, (9), αD-121) constitutes a braking mechanism (g).

The conventional elevator emergency stop device is constructed as described above and operates as follows.

Now, when the car is descending and its speed reaches a predetermined overspeed and the speed governor is activated, the A speed machine rope Ql is fixed in space. However, since the car continues to descend further, the lever (9) is pulled up and the shaft (8) is rotated clockwise in FIG. 4. Also, this rotation is caused by the link α and the lever a.
) is transmitted to the axis αD.

Rotate this counterclockwise. Therefore, the 1 actuation levers α◆ and a are rotated, the slider a1αη is moved upward on both the left and right sides, and the pressing body 0 is moved while the roller ■ is transferred.
It rises along the slope of σj. As the sliders σQ and αη rise, the gaps between them and the guide surface of the guide rail (6) gradually become narrower 91 until they come into contact with each other. If it rises further, the leaf spring Qυ is pushed open, and the sliders 00 and tin are pressed against the guide surface of the guide rail (6), creating a frictional force between them. This frictional force can be used to brake the heel. This braking force is applied to the guide rail (6) and the slider (Ie).

It is determined by the product of the friction coefficient aη and the spring force that presses the sliders as and an against the guide rail (6). After all, the coefficient of friction is almost constant regardless of the spring force.

The braking force is determined by the spring force of the leaf spring Qυ.

[Problem to be solved by the invention]

In the conventional elevator emergency stop device as described above,
The braking mechanism (E) is installed below the car floor (5).

And the braking force is leaf spring C! Since it is determined by the spring force of υ, in the case of a large-capacity elevator, a large spring force is required and the braking mechanism (c) is large in size. Therefore, there is a problem in that a large space is occupied under the car where the braking mechanism is disposed, and a large space is therefore required for the hoistway pit.

This invention was made to solve the above-mentioned problems. Even in large-capacity elevators, the braking mechanism under the car floor does not become large, and the emergency stop of the elevator does not require a large space in the hoistway pit. The purpose is to provide equipment.

[Means to solve the problem]

An elevator emergency stop device according to the present invention.

A plurality of sets of braking mechanisms are installed on the elevating body, and the operating levers of the braking mechanisms are connected to each other by a connecting frame that is extendable and retractable in the longitudinal direction.

[Effect]

In this invention, since a plurality of sets of braking mechanisms are installed on the elevating body, the braking capacity of one set of braking mechanisms may be small. Further, the necessary braking force can be obtained by increasing or decreasing the number of the same braking mechanisms depending on the capacity of the elevator. Furthermore, since the nine operating levers are connected to each other by a connecting rod, all the braking mechanisms work together.

〔Example〕

FIGS. 1 and 2 are views showing one embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a right side view.

Portions similar to those of the conventional device are designated by the same reference numerals.

In the figure, (25A) and (25B) are the upper frame (3), respectively.
) and an upper braking mechanism and a lower braking mechanism that are housed within the lower frame (4) and configured in substantially the same way as the conventional braking mechanism (c);
6υ are joints pivoted to the upper and lower levers (9), respectively.

(to) is a longitudinal member, with a right-hand thread (52a) at the upper end and a left-hand thread (s2b) at the lower end, each nut (to)
, (b) are fastened to the joint OD, and the upper and lower levers (
9), the governor rope α [is connected to the lever (9) of the upper braking mechanism (25A).

In the elevator emergency stop device configured as described above, there are upper and lower braking mechanisms (25A).

(25B) are connected by the connecting rod ■, so when the governor lobe UI is grasped and the upper lever (9) is rotated, the lower lever (9) is also rotated, and the upper and The lower braking mechanisms (25A) and (25B) operate simultaneously. Therefore, the upper and lower braking mechanisms (25A), (25
B) is.

It only needs to be half the braking capacity of the conventional braking mechanism (c).

Since the structure can be made compact, the space under the car floor (5) is reduced.

Note that since the upper braking mechanism (25A) is housed within the upper frame (3), interference with other equipment can be avoided.

It is necessary that the upper and lower braking mechanisms (25B) operate simultaneously. If the times at which the upper and lower sliders aelαη are pressed against the guide rail (6) do not coincide, the timing at which the braking force is generated will be incorrect.

The car may tilt and stop, or the leaf spring ring may not exert its proper spring force. The connecting rod (to) adjusts the timing at which this slider (11, Q7) is pressed against the guide rail (6) so that the upper and lower parts coincide.

Adjustment is possible using a right-hand screw (32a), a left-hand screw (szb), and nuts (to). Further, the timing at which the left and right sliders αe and αη in FIG. 1 are pressed against the guide rail (6) can also be adjusted using the link I.

Fig. 3 is a perspective view showing another embodiment of the connecting rod of the present invention, in which a turnbuckle is provided in the middle of the connecting rods, and it has the same function as the one described above. Fulfill.

In addition, in Figure 1, there is a lever (9) on the upper and lower shafts α0.
A lever (not shown) similar to the above is fixed, and the levers are connected to each other by a connecting rod similar to the connecting rod (to).

The left and right sliders ill and 11η may be adjustable separately. In this case, link Q3 becomes unnecessary.

In the embodiment, there are braking mechanisms (25A) at the top and bottom.

(25B), but it is also possible to install three or more sets. In this case, the sliders αe, αD.

The same rollers (A), pressing bodies α, α, leaf springs I2υ, etc. can be used. This allows medium-capacity elevators to
In the case of a large-capacity elevator, one set of braking mechanisms is used, and in the case of a large-capacity elevator, multiple sets of braking mechanisms are used to reduce the number of types, increasing the number of products produced and improving productivity.

Although the above embodiment has been described in the case where it is applied to a heel emergency stop device, it is also applicable to a counterweight emergency stop device.

〔Effect of the invention〕

As explained above, in this invention, a plurality of sets of braking mechanisms are installed on the elevating body, and the operating levers of the braking mechanisms are connected to each other by a connecting rod that is extendable and retractable in the longitudinal direction. This has the effect of not requiring a large space for the hoistway bit. Also.

This also has the effect of reducing the number of types of braking mechanisms and improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of an emergency stop device for an elevator according to the present invention, Fig. 2 is a right side view (partial cross section) of Fig. 1, and Fig. 3 is another embodiment of the invention. Fig. 4 is a front view showing a conventional elevator emergency stop device, and Fig. 5 is a left side view (partial cross section) of Fig. 4.
It is. In the figure, (1) is the elevating body (car frame) i6) is the guide rail, α1 is the governor rope, (9) is the lever, α9 is the operating lever, αe, αη are the sliders, (25A) (25B) is the upper braking mechanism, (25B) is the lower braking mechanism, and (25B) is the connecting rod. Note that the same reference numerals in Figure 1 indicate the same parts.

Claims (1)

[Claims] When the operating lever connected to the speed governor rope rotates, the sliding surface of the slider attached to the elevating body is pressed and slid against the guide surface of the guide rail, causing the braking mechanism to stop the elevating body. An emergency stop device for an elevator, wherein a plurality of actuating levers of the braking mechanism are connected to each other by a connecting rod that is extendable and retractable in the longitudinal direction.