JP2023127714A - elevator - Google Patents

Abstract

To provide an elevator equipped with an emergency stop device capable of changing a pulling-up amount without changing a component of a pulling-up mechanism.SOLUTION: This elevator comprises: a car (3); an emergency stop device (11) provided in the car; and a pulling-up mechanism (110) that is provided in the car and that pulls up a damper of the emergency stop device. The pulling-up mechanism is provided with a pulling-up lever (12) connected to a governor rope, and a link member (17) that is rotatably supported in the car and that rotates in accordance with displacement of the pulling-up lever. The damper (14) of the emergency stop device is connected to the end of the link member so that it can be pulled up. The link member is configured to be able to change the position of a rotary shaft.SELECTED DRAWING: Figure 3

Description

The present invention relates to an elevator equipped with an emergency stop device.

Elevators are equipped with a speed governor and an emergency stop device to constantly monitor the ascending and descending speed of the car and to bring the car to an emergency stop when the car reaches a predetermined overspeed state. Generally, the car and the speed governor are connected by a speed governor rope, and when an overspeed condition is detected, the speed governor brakes the speed governor rope to operate the emergency stop device on the car side. It is designed to bring the car to an emergency stop.

As a conventional technology related to an emergency stop device for an elevator, the technology described in Patent Document 1 is known.

In this prior art, an emergency stop device and a lifting mechanism for operating the emergency stop device are provided at the bottom of the car. The pull-up mechanism includes a pull-up lever to which the governor rope is connected, and a pull-up link that connects the pull-up lever and the emergency stop device. When the speed governor rope is braked by the governor, the lift lever rotates as the car descends. When the pull-up link is displaced in conjunction with the rotation of the pull-up lever, the emergency stop device operates.

Japanese Patent Application Publication No. 2013-193845

In the above-described conventional technology, when the amount of lifting changes depending on the mounting position of the lifting mechanism, it is necessary to change the components of the lifting mechanism.

Therefore, the present invention provides an elevator equipped with an emergency stop device that can change the lifting amount without changing the components of the lifting mechanism.

In order to solve the above problems, an elevator according to the present invention includes a car, an emergency stop device provided in the car, and a pulling mechanism provided in the car to pull up a brake of the emergency stop device. The pulling mechanism includes a pulling lever connected to the speed governor rope, a link member rotatably supported in the car, and rotating in response to displacement of the lifting lever, and an end of the link member. A brake of the emergency stop device is connected to the part so as to be able to be pulled up, and the link member is configured such that the position of the rotation shaft can be changed.

According to the present invention, the amount of lifting can be changed without changing the components of the lifting mechanism.

Problems, configurations, and effects other than those described above will be made clear by the following description of the embodiments.

FIG. 1 is a schematic configuration diagram of an elevator that is an example. FIG. 3 is a schematic front view showing the arrangement of a mechanism for operating the emergency stop device in the embodiment. It is a side view which shows the structure of the emergency stop device and the pulling mechanism in an Example. It is a partial block diagram of the pulling mechanism which shows the rotation state of a link member.

An elevator that is an embodiment of the present invention will be described with reference to the drawings in accordance with the following examples. In each figure, the same reference numbers indicate the same constituent elements or constituent elements with similar functions.

FIG. 1 is a schematic diagram of an elevator according to an embodiment of the present invention.

This elevator has a hoisting machine installed at the top of the hoistway, and a car 3 is connected to one end of a main rope 2 that is wound around a traction sheave 1 and a direction change pulley 50 in the hoisting machine. A counterweight 4 is connected to the other end of 2.

The car 3 is suspended by the main rope 2 within the hoistway. When the hoist is driven by the electric motor and the traction sheave 1 is rotated, the main rope 2 is driven. Thereby, the car 3 moves up and down in the hoistway along a pair of car guide rails 5A and 5B installed in the hoistway. Further, the counterweight 4 moves up and down in the hoistway in the opposite direction to the car 3 along a pair of weight guide rails 6A and 6B installed in the hoistway.

The speed governor 7 includes a speed governor pulley 8 disposed at the top of the hoistway, a tension pulley 9 installed at the bottom of the hoistway, and an endless structure between the speed governor pulley 8 and the tension pulley 9. It has a governor rope 10 that can be wrapped around it.

At the lower part of the car 3, an emergency stop device 11 is arranged which stops the elevator car 3 from moving up and down by clamping the car guide rails 5A and 5B using a brake which will be described later in case of an emergency. As will be described later, one end of a lifting lever 12 included in the lifting mechanism of the emergency stop device 11 is connected to the governor rope 10.

In this embodiment, one emergency stop device 11 is provided on each side of the lower part of the car 3.

Since the speed governor rope 10 moves up and down in synchronization with the car 3 via the pull-up lever 12, the speed governor 7 can detect the speed of the car 3 according to the movement of the speed governor rope 10. When the speed governor 7 detects that the lifting speed of the car 3 exceeds the rated speed and reaches a first overspeed (for example, a speed not exceeding 1.3 times the rated speed), it drives the hoisting machine. Shut off the power to the motor and the control device that controls the motor. Furthermore, when the descending speed of the car 3 reaches a second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the speed governor 7 operates the emergency stop device 11 via the pull lever 12. and mechanically brings the car 3 to an emergency stop.

FIG. 2 is a schematic front view showing the arrangement of a mechanism for operating the emergency stop device 11 in this embodiment.

As described above, the emergency stop devices 11 are provided one each on the left and right sides of the lower part of the car 3.
A pulling mechanism 110 is provided on each emergency stop device 11 to pull up a brake ("14" in FIG. 3) of the emergency stop device 11 when the car 3 is brought to an emergency stop.

At the bottom of the car 3, lifting mechanisms 110 located on the left and right sides of the car 3 are mechanically connected via a link shaft 30. The link shaft 30 is rotatably supported by a bearing 32 and a shaft bracket 31 fixed to the lower frame 60 of the car 3.

One of the lifting mechanisms 110 provided at two places on the left and right at the bottom of the car 3 has a pulling lever 12. A governor rope 10 (FIG. 1), which is not shown in FIG. 2, is connected to one end of the pull-up lever 12. Moreover, the other end of the pull-up lever 12 is connected to one end of the link shaft 30. When the speed governor rope 10 is braked by the speed governor 7, the pull lever 12 rotates around the link shaft 30 as the car 3 descends, and one end of the pull lever 12 moves upward (in FIG. 2). (in the direction of arrow C).

When one end of the pull-up lever 12 is displaced, the brake on one side (the right side in FIG. 2) of the pair of left and right emergency stop devices 11 is pulled up by the pull-up mechanism 110 including the pull-up lever 12. When one end of the pull-up lever 12 is displaced, that is, when the pull-up lever 12 rotates, the link shaft 30 rotates (arrow D in FIG. 2). As a result, the other brake of the pair of left and right emergency stop devices 11 (left side in FIG. 2) is pulled up by the pulling mechanism 110 (left side in FIG. 2) mechanically connected to the other end of the link shaft 30.

In this way, the pair of left and right emergency stop devices 11 are operated together by the lifting mechanism 110 that is interlocked by the link shaft 30.

FIG. 3 is a side view showing the configuration of the emergency stop device 11 and the lifting mechanism 110 in this embodiment. In FIG. 3, the emergency stop device 11 is not operating. That is, the elevator is in normal operation.

A governor rope 10 (FIG. 1), which is not shown in FIG. 3, is connected to one end (left side in FIG. 3) of the horizontally extending pull-up lever 12. The pull-up lever 12 is connected to one end of the link shaft 30 near the other end of the pull-up lever 12 . Thereby, the pull lever 12 can rotate around the link shaft 30. When the pull-up lever 12 rotates, the link shaft 30 rotates together with the pull-up lever 12.

The other end of the pull-up lever 12 (on the right side in FIG. 2) is rotatably connected to one end of the link member 21 via a rotation pin 44.

The other end of the link member 21 (on the right side in FIG. 2) is rotatable with respect to the connecting member 16 which is fixedly connected to one end of the link member 17 extending in the horizontal direction via a rotation shaft 43. Connected. Note that the link member 17 is located above the pull-up lever 12.

A hole 71 and a hole 72 are provided at one end of the link member 17 for inserting a rotation pin therethrough. The hole 71 and the hole 72 are arranged in parallel in the horizontal direction. The link member 17 is rotatably supported by a link member bracket 70 fixed to the lower frame 60 (FIG. 2) via a rotation pin inserted into either the hole 71 or the hole 72. be done.

The link member bracket 70 is also provided with two holes through which the rotating pins are inserted, at positions corresponding to the holes 71 and 72 of the link member 17. That is, the two holes in the link member bracket 70 are arranged in parallel in the horizontal direction at the same distance as the distance between the holes 71 and 72. In this example, the distance between the holes is the distance between the centers of the holes.

The link member 17 is rotatably supported by the link member bracket 70 by a rotating pin inserted through one of the holes 71 and 72 of the link member 17 and the corresponding hole in the link member bracket 70. Ru.

As shown in FIG. 3, when the link member 17 is located so as to extend in the horizontal direction, the relative relationship between the link member 17 and the link member bracket 70 is The positional relationship is the same.

The other end of the link member 17 (on the right side in FIG. 3) is rotatably connected to one end of the link member 19 via a rotation pin 42 above the emergency stop device 11. The other end of the link member 19 is rotatably connected to a pull-up rod 20 that pulls up the brake 14 of the emergency stop device 11 via a rotation pin 41 .

The emergency stop device 11 includes a pair of brakes 14 (wedge-shaped bodies) arranged symmetrically across a car guide rail 5A (not shown in FIG. An elastic body (for example, a spring body such as a U spring), which is not shown, is arranged to apply a pressing force from the side of the guide 15 opposite to the guide rail to the car guide rail 5A. The emergency stop device 11 in this embodiment is based on a known technique.

When one end of the pull lever 12 is displaced upward (arrow C), the link member 17 rotates around a rotating pin inserted into one of the holes 71 and 72 (arrow A), so that the link member 17 The other end is displaced upward (arrow E). As a result, the pulling rod 20 is displaced upward, so that the brake element 14 is pulled up.

The emergency stop device 11 and the pulling mechanism 110 shown in FIG. 3 are one of the left and right pairs of the emergency stop device 11 and the pulling mechanism included in the car 3, but the other set also has a similar configuration. Note that in the other set, a link member to which the governor rope 10 is not connected is used in place of the pull lever 12. This link member is connected to the link shaft 30 in the same way as the pull lever 12. Therefore, when the pull-up rod 20 is displaced upward and the link shaft rotates, the pull-up mechanism 110 also operates in the other group, and the brake 14 of the emergency stop device 11 is pulled up.

FIG. 4 is a partial configuration diagram of the pulling mechanism 110 showing a rotating state of the link member 17.

The solid line indicates the position of the link member 17 when the link member 17 rotates about the rotation axis about the rotation pin inserted through the hole 71 and the hole of the link member bracket 70 corresponding to the hole 71. . In addition, the chain line indicates the position of the link member 17 when the link member 17 rotates about the rotation axis about the rotation pin inserted through the hole 72 and the hole of the link member bracket 70 corresponding to the hole 72. Indicated by

Note that in both cases, the amount of upward displacement of the pull lever 12 is the same.

As shown in FIG. 4, the height of the rotating pin 42 is higher in the solid line than in the chain line by Δh in the figure. That is, it is better to use the rotation pin inserted through the hole 71 and the hole of the link member bracket 70 corresponding to the hole 71 as the rotation axis, since the hole 72 and the link member corresponding to the hole 72 The amount by which the brake 14 of the emergency stop device 11 can be pulled up is greater than when the rotating pin inserted through the hole of the bracket 70 is used as the rotating shaft.

In this embodiment, for the same amount of upward displacement of the pull lever 12, the rotation angles of all the rotation shafts are approximately the same magnitude. Further, as shown in the figure, in the link member 17, the distance (L2) between the rotation pin 42 and the rotation axis passing through the hole 71 is the distance (L1) between the rotation pin 42 and the rotation axis passing through the hole 72. (L2>L1). Therefore, the amount of upward displacement (arrow E) of the end of the link member 17 through which the rotation pin 42 is inserted is the amount of displacement upward (arrow E) of the end of the link member 17 through which the rotating pin 42 is inserted. The rotation axis is larger when the rotation pin is used as the rotation axis than when the rotation pin inserted through the hole 72 and the hole of the link member bracket 70 corresponding to the hole 72 is used as the rotation axis. For this reason, the amount by which the brake element 14 is lifted is greater in the former case than in the latter case.

In this embodiment, the distance between the rotation axis and the rotation pin 42 is the distance between the center of the rotation axis and the center of the rotation pin 42.

As described above, according to this embodiment, the link member 17, which is rotatably supported at the lower part of the car 3 and to which the brake 14 of the emergency stop device 11 is connected to the end so that it can be pulled up, is rotatably supported at the bottom of the car 3. Constructed so that the position of the axis can be changed. Thereby, the amount by which the brake element 14 is lifted can be changed.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Further, some of the configurations of each embodiment can be deleted, other configurations can be added, and other configurations can be replaced.

For example, the number of holes provided in the link member is not limited to two, but may be plural.

Further, the holes provided in the link member 17 and the link member bracket 70 may be elongated holes. In this case, a member is provided to fix the position of the rotation shaft in the elongated hole.

Further, the elevator may be an elevator without a machine room.

1... Traction sheave, 2... Main rope, 3... Car, 4... Counterweight, 5A, 5B... Guide rail for car, 6A, 6B... Guide rail for weight, 7... Governor, 8... Governor pulley , 9... Tension pulley, 10... Governor rope, 11... Emergency stop device, 12... Pulling lever, 13... Housing, 14... Brake element, 15... Guide element, 16... Connection member, 17... Link member, 19 ... Link member, 20 ... Pulling rod, 21 ... Link member, 30 ... Link shaft, 31 ... Shaft bracket, 32 ... Bearing, 41 ... Rotation pin, 42 ... Rotation pin, 43 ... Rotation shaft, 44 ... Rotation pin , 50... direction change pulley, 60... lower frame, 70... link member bracket, 71... hole, 72... hole, 110... lifting mechanism

Claims (7)

The car,
an emergency stop device provided in the car;
a pulling mechanism provided in the car to pull up a brake of the emergency stop device;
In an elevator equipped with
The pulling mechanism is
a pull-up lever connected to the governor rope;
a link member that is rotatably supported in the car and rotates in response to displacement of the pull-up lever;
Equipped with
A brake of the emergency stop device is connected to an end of the link member so that it can be pulled up,
The elevator is characterized in that the link member is configured such that the position of the rotation axis can be changed. The elevator according to claim 1,
The link member has a first hole and a second hole,
An elevator characterized in that the rotation shaft passes through one of the first hole and the second hole. The elevator according to claim 2,
The distance between the connection part of the end of the link member with the brake element and the first hole is larger than the distance between the connection part and the second hole. elevator. The elevator according to claim 2,
The elevator is characterized in that the link member is connected to the pulling lever via another link member. The elevator according to claim 1,
An elevator characterized in that the emergency stop device and the lifting mechanism are located below the car. The elevator according to claim 1,
moreover,
Another emergency stop device provided in the car;
another lifting mechanism that is provided in the car and that pulls up a brake of the other emergency stop device;
Equipped with
An elevator characterized in that the pulling mechanism and the other lifting mechanism are mechanically connected via a link part. The elevator according to claim 6,
The elevator characterized in that the emergency stop device, the other emergency stop device, the pulling mechanism, the other lifting mechanism, and the link portion are located below the car.

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