JP2008007289A - Safety device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device of an elevator, having a pull-up mechanism capable of surely operating an emergency stop device. <P>SOLUTION: The pull-up mechanism is formed of a pull-up rod operating in association with a pull-up switch mechanism, a brake member connected to the pull-up rod, and a pull-up member connected to an emergency stop pull-up rod. The brake member is intruded into the gap formed by a guide rail and the pull-up member by the operation of the pull-up rod, and a frictional force is produced between the guide rail and the brake member. The brake member is further intruded into the gap and a stronger frictional force is produced to stop the pull-up member. Since the pull-up member is stopped, the emergency stop pull-up rod connected to the emergency stop device moving together with a car is moved relative to the emergency stop device and the emergency stop device can be operated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator safety device.

As a conventional technique related to an elevator safety device, for example, an invention disclosed in US Pat. No. 4,662,481 (hereinafter referred to as Patent Document 1) is known.
In Patent Document 1, a governor device is installed on the upper part of a car.
The governor apparatus will be described. The tire member is rotated by the frictional force between the rail and the tire member mounted opposite to the rail to detect the speed of the car. Further, the rotation of the tire member is forcibly stopped using the centrifugal force of the flyweight generated with the rotation of the tire member. When the rotation of the tire member is forcibly stopped, the rotation member having the rotation fulcrum rotates around the rotation fulcrum by the frictional force between the rail and the tire member, and the link is attached to the rotation member. Pull up the member. The car is urgently stopped by operating the emergency stop device by pulling up the link member.

  The tire member of Patent Document 1 has a function of detecting the speed of the car by rotating the tire member itself, forcibly stopping the rotation of the tire member to generate a frictional force between the tire member and the rail, The frictional force becomes a force for rotating the rotating member, and has a function of pulling up the link member and operating the emergency stop device.

USP No. 4,662,481

  As described above, in Patent Document 1, the switching of the emergency stop device operation start is that the tire member that is always rotating in contact with the rail stops on the rail. Therefore, a predetermined pressing force is required. Therefore, it is necessary to give the rail itself a predetermined strength, and since the tire member always rotates in contact with the rail, the friction coefficient on the surface of the tire member may change.

  An object of the present invention is to provide an elevator safety device capable of stopping switching due to stopping of a tire member and operating an emergency stop device with a light force.

  The purpose of the above is to provide a guide rail provided on the wall of the hoistway along the moving direction of the car, a governor for detecting the moving speed of the car in contact with the guide rail, and the car by the governor A lifting switch that operates when the speed of the lifting switch is exceeded, a lifting mechanism that grips the guide rail and pulls up the emergency stop lifting rod by the operation of the lifting switch, and an emergency stop device that operates by the pulled up lifting rod In the constructed elevator safety device, the operating force of the lifting switch is achieved by being smaller than the emergency stop lifting rod lifting force of the lifting mechanism.

In addition, the above object is to provide a guide rail provided on the hoistway wall along the moving direction of the car, a governor that detects the moving speed of the car by contacting the guide rail, and the car by the governor. A pull-up switch that operates when a predetermined speed is exceeded, and a pull-up lever that provides an operating force for gripping the guide rail and pulling up the emergency stop pull-up rod by the operation of the pull-up switch;
In an elevator safety device comprising an emergency stop device that is operated by the pulled-up pulling rod, the pulling rod that interlocks with the pulling lever is provided with a pulling mechanism having a roller that holds the guide rail, and the pulling-up mechanism The operation of the lever achieves the roller by entering a gap formed between the guide rail and the pulling mechanism.

  The above-mentioned object is achieved by the pulling mechanism being configured so that the guide rail is sandwiched between two rollers, and the normal roller is expanded in the anti-guide rail direction by a spring.

  Further, the above object is achieved by including a brake member rotatably supported by the pulling mechanism, and the brake member enters a gap formed between the guide rail and the pulling mechanism by the operation of the pulling lever. The

  The above-described object is achieved by the pulling mechanism being configured so that the guide rail is sandwiched between two brake members, and the normal roller is expanded in the anti-guide rail direction by a spring.

  ADVANTAGE OF THE INVENTION According to this invention, the elevator safety device which can stop the switching by the stop of a tire member and can operate an emergency stop apparatus with light force can be provided.

First, a general elevator will be described with reference to FIG.
In FIG. 8, the elevator has a configuration in which a weight 10 is attached to one end and a main rope 9 having a car 1 attached to the other end is wound around a hoisting machine 8. With the rotation of the hoisting machine 8, the main rope 9 moves and the car 1 moves up and down. Also, guide rollers (not shown) are installed on both sides of the car 1 so that the car 1 is not subjected to vibrations that deteriorate the riding comfort such as rolling when moving up and down. It supports so that the rail 4 may be inserted | pinched.

  The car 1 further includes an emergency stop device 2 that applies a brake when the elevator moves at an abnormal speed, and an operating lever 3 that operates the emergency stop device 2. The actuating lever 3 and the governor rope 6 are connected, and the governor rope 6 is wound around the governor 5 and the governor sheave 7 and moves up and down as the car 1 moves. The governor 5 has means for detecting the moving speed of the governor rope 6 that moves together with the car 1, and when it detects that the car 1 is moving at an abnormal speed, it holds the governor rope 6 and It has a function of stopping the car 1 by operating the emergency stop device 2 by stopping the movement and pulling up the operating lever 3 upward.

  The governor 5 is generally installed in a machine room at the top of the car, or is installed in a hoistway in an elevator not equipped with a machine room. It is necessary to stretch the governor rope 6 in the hoistway.

  However, a governor apparatus that does not require the governor rope 6 to be stretched in the hoistway to meet the demand for further space saving and cost reduction of the recent elevator system, that is, the governor 5 in which the governor 5 is attached to the car 1. A press governor device has been proposed. In addition, since the governor rope 6 may vibrate due to expansion and contraction due to an operating state or an earthquake, a rope press governor device is desired. Furthermore, because of the weight of the governor rope 6 itself and the inertial force caused by the movement, the gripping force of the governor rope 6 increases, and accordingly, the operating force for gripping the governor rope 6 also increases.

  Thus, there is a governor device of a governor-low press as in the above-described conventional technique (Patent Document 1), but as described above, problems associated with changes in the friction coefficient of the tire member can be considered.

  Therefore, in the present invention, as a result of various studies on safety devices that do not use tire members, the following examples could be obtained.

  The safety device of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of an elevator including a low press governor.

  In FIG. 1, an elevator equipped with a safety device has a main rope 9 having a weight 10 attached to one end and a car 1 connected to the other end. It is a hoisting machine 8 that applies a moving force to the car 1 by winding the main rope 9. A guide rail 4 that sandwiches the car 1 is provided on the wall surface of the hoistway along the moving direction of the car 1. A guide roller (not shown) is attached to the car 1 and suppresses vibration of the car 1 by sandwiching the guide rail 4 therebetween.

The elevator is provided with a governor 18 that is opposed to the guide rail 4 above the car 1 and detects the moving speed of the car in contact with the guide rail 4. The pulley 16 is attached by being pressed against the guide rail 4 opposite to the guide rail on which the governor 18 is installed. The pulling lever 11 operates when the governor 18 reaches a predetermined speed or higher. A pulling rod 12 is connected to the pulling lever 11. The pulling mechanism 13 grips the guide rail 4 by the operation of the pulling rod 12 and pulls up the emergency stop pulling rod 14. The emergency stop device 2 is connected to the emergency stop lifting rod 14 and is installed in the car 1. The interlocking link member 15 connects the emergency stop devices 2 to operate the emergency stop devices 2 simultaneously. All of these mechanisms are mounted on an isolation base 17 on the car 1.

  When the governor 18 detects that the car 1 is moving at an abnormal speed, the pulling lever 11 operates to pull the pulling rod 12 up. The pulling mechanism 13 grips the guide rail by the pulling operation of the pulling rod 12, and the speed difference between the emergency stop lifting rod 14 connected to the pulling mechanism 13 and the emergency stop device 2 installed in the car 1. Occurs and the emergency stop device 2 is operated.

Next, the outline of the governor will be described with reference to FIGS.
FIG. 2 is a side view of a governor provided with an embodiment of the present invention.
FIG. 3 is a side view of the governor for explaining the operation of this embodiment.
In FIG. 2, the governor 18 is provided with a governor pulley 34 that faces the guide rail 4 described with reference to FIG. Two pendulums 35 that are rotatably supported are mounted inside the governor pulley 34. A connecting rod 36 connects the pendulums 35 to each other.
Reference numeral 38 denotes a switch for cutting off the power of the motor. Reference numeral 37 denotes a switch lever for turning the switch 38 on and off. Reference numeral 39 denotes a pulling switch for operating the pulling lever 42. Reference numeral 41 denotes a pressing spring that generates a force for pressing the governor pulley 34 against the guide rail 4. Reference numeral 40 denotes a plate for fixing a governor comprising these mechanism elements.

  The contact surface of the governor pulley 34 that contacts the guide rail 4 with the guide rail 4 may be made of an elastic body such as rubber in order to absorb vibrations or reduce noise caused by the guide rail joint. Further, a pulling spring 44 is attached to the pulling lever 11 (shown in FIG. 1), and when the pulling switch 39 is operated, the pulling spring 44 pushes up the pulling lever 11 and the pulling rod 12 (identical to FIG. 1). Move objects). The pull-up rod 12 is connected to a pull-up mechanism 13, and an emergency stop pull-up rod 14 (shown in the same manner as FIG. 1) is connected to the pull-up mechanism 13. The movement of the pulling mechanism 13 is restricted by the upper stopper 45 and the lower stopper 46.

In FIG. 3, the process up to the operation of the pulling mechanism will be described. The governor pulley 34 that contacts the guide rail 4 rotates counterclockwise as the car moves downward in the drawing. When the rotational speed reaches the preset first speed, the two pendulums 35 are spread in the centrifugal direction by the centrifugal force accompanying the rotation of the governor pulley 34, and the switch lever 37 is moved counterclockwise as indicated by the arrow. Separate from the switch 38. When the speed further exceeds the second speed, the pull-up switch 39 is rotated as shown in the drawing, and the pull-up lever 42 can be moved by the pull-up spring 44. By releasing the compressed pulling spring 44, the pulling lever 11 (shown in the same way as FIG. 1) moves upward (in the direction of the arrow) and the pulling rod 12 (showing the same thing as in FIG. 1) moves. Thus, the operation of the pulling mechanism 13 starts. At this time, the pulling spring 44 only needs to generate a force enough to operate the pulling mechanism 13, and may not be a force necessary to operate an emergency stop device described later. Since the car further descends while the pulling mechanism 13 operates, the emergency stop lifting rod 14 (shown in the same manner as FIG. 1) is pulled up, and the emergency stop device (not shown) operates.

  Next, details of the pulling mechanism provided with the present embodiment will be described with reference to FIGS. 4 to 5 and FIGS. 6 to 7.

FIG. 4 is a view showing an example of a pulling mechanism provided with an embodiment of the present invention.
In the pulling mechanism 13 shown in FIG. 4A, the pulling rod 12 is connected to a link mechanism 21 that supports a roller 19 that is a brake member disposed so as to sandwich the guide rail 4. A return spring 20 is attached to the other end other than one end to which the roller 19 is attached. Two rollers 19 are attached and are usually supported by a return spring 20 in the direction in which the two rollers are pushed and expanded inside the pulling mechanism 13 (in the direction of the anti-guide rail 4). Further, a pulling wedge part 22 as a pulling member is disposed so as to fit the roller 19 into the hole. Further, an emergency stop lifting rod 14 is connected to the lifting wedge portion 22.

  In the pulling mechanism 13 shown in FIG. 4B, the pulling wedge portion friction surfaces 22a and 22b where the pulling wedge portion 22 and the roller 19 are in contact are inclined, and the pulling rod 12 is pulled in the direction of arrow A. Since the two rollers 19 enter the gap (inclined portion) between the pulling mechanism 13 and the guide rail 4, a strong contact force (arrow B) between the pulling wedge portion 22, the roller 19, and the guide rail 4. ) Occurs to stop the lifting wedge 22.

  When returning the pulling mechanism 13, the return spring 20 is restored and returned to the original state by removing the roller 19 from the gap.

FIG. 5 is a view showing a pulling mechanism provided with the second embodiment.
In the pulling mechanism of FIG. 5, the roller as a brake member is not arranged on both sides of the rail as shown in FIG. 4, but the structure is simplified by arranging it on only one side.

  The pulling mechanism 13 shown in FIG. 5A fits a pulling rod 23 having a rotation fulcrum 24 having a member that generates a rotational force such as a torsion spring, a roller 19 as a brake member, and the roller 19. It consists of a pulling wedge part 25 having a hole, and a pulling rod 14 having one end connected to the pulling wedge part 25 and the other end connected to an emergency stop device.

  In the pulling wedge portion 25, the pulling wedge portion friction surface 25a in contact with the roller 19 is inclined. Further, the pulling wedge friction surface 25 b in contact with the guide rail 4 is a surface parallel to the guide rail 4. The roller 19 is urged so as to constantly come into contact with the pulling wedge portion friction surface 25a by a member that generates a rotational force such as a torsion spring (not shown) installed at the rotation fulcrum 24.

  The operation will be described with reference to FIGS. 5B and 5C. When the pulling rod is pulled up as shown by an arrow C by a pulling lever (not shown), the roller 19 is pulled up by the lifting wedge friction surface 25a and the guide rail. 4 is contacted. When the roller 19 comes into contact with the pulling wedge 25 and the guide rail 4, a force acts on the pulling wedge 25 as indicated by an arrow D, and the pulling wedge 25 is moved in the direction of arrow E. When the roller 19 bites into the inclined portion formed by the pulling wedge portion 25, the roller 19 further bites by the frictional force of the guide rail 4 and the roller 19, and the pulling wedge portion friction surface 25b finally comes into contact with the guide rail 4 A strong contact force (arrow F, arrow G) is generated between the roller 19 and the lifting wedge 25 and the guide rail 4. As a result, the pulling mechanism 13 stops on the guide rail 4 and pulls up the emergency stop pulling rod to operate the emergency stop device.

  In the case of FIG. 5, as in FIG. 4, when the contact between the pulling wedge 25 and the guide rail 4 and the roller 19 is released and returned (for example, the pulling wedge is moved upward), the rotation fulcrum 24 is provided. The torsion spring is used to automatically move away from the guide rail and return to the original position.

  Next, another example of the pulling mechanism will be described with reference to FIG.

FIG. 6 is a view showing a pulling mechanism provided with the third embodiment.
In the pulling mechanism 13 shown in FIG. 6A, the pulling mechanism 13 includes a pulling rod 26 having a shaft 26a, a leading member 27 as a brake member having a long hole 27a and a rotation fulcrum 27b, and a spring force on the leading member 27. The return spring 29 is provided with a rotation block 28b, a lifting block 28 for fixing one end of the return spring 29, and an emergency stop lifting rod 14 attached to the lifting block 28. One end of the return spring 29 is fixed to the leading member 27, and a spring force is applied in a direction away from the guide rail 4. The shaft 26a and the elongated hole 27a are fitted together, and the shaft 26a is movable in the elongated hole 27a.

  The operation will be described with reference to FIGS. 6 (a) and 6 (b). When the pulling rod 26 is pulled upward as shown by the arrow H, the leading member 27 rotates as shown by the arrow J around the rotation fulcrum 27b. As a result, the leading member 27 and the guide rail 4 come into contact. When the leading member 27 comes into contact, the leading member 27 bites into the guide rail 4 at the front edge in the contact surface moving direction, and a force larger than the initial contact force acts, and this force causes the pulling block 28 to move. Is stopped. When the pulling block 28 stops, the emergency stop pulling rod also stops, and a speed difference is generated between the moving car and the emergency stop device, so that a force for operating the emergency stop device is applied.

  When the pulling mechanism returns, when the pulling block 28 is moved upward, for example, the leading member 27 is separated from the guide rail 4 by the spring force of the return spring 29 and returns to the original position.

  FIG. 7 is a view showing a pulling mechanism provided with the fourth embodiment.

  The pulling mechanism of FIG. 7 is intended to simplify the structure by arranging the leading members, which are brake members, on both sides of the rail as shown in FIG. 6, but only on one side.

In the pulling mechanism 13 shown in FIG. 7A, the pulling mechanism 13 includes a pulling rod 30 having a shaft 30a, a leading member 31 that is a brake member having a long hole 31b and a rotation fulcrum 31a, and a spring force on the leading member 31. The return spring 33 is provided with a rotation block 31a and a lifting block 32 for fixing one end of the return spring 33, and the emergency stop lifting rod 14 attached to the lifting block 32. One end of the return spring 33 is fixed to the leading member 31, and a spring force is applied in a direction away from the guide rail 4. The shaft 30a and the elongated hole 31b are fitted together, and the shaft 30a is movable in the elongated hole 31b.

  The operation will be described with reference to FIGS. 7B and 7C. When the pulling rod 30 is pulled upward as shown by the arrow K, the leading member 31 rotates as shown by the arrow L around the rotation fulcrum 31a. As a result, the leading member 31 and the guide rail 4 come into contact. When the leading member 31 comes into contact and is further lifted in the direction of the arrow K, the end face of the pulling block and the guide rail 4 finally come into contact, and a large braking force acts on the pulling block 32. As a result, when the lifting block 32 is stopped, the emergency stop lifting rod is also stopped, and a speed difference is generated between the moving car and the emergency stop device, so that a force for operating the emergency stop device is applied.

  When the pulling mechanism returns, for example, when the pulling block 32 is moved upward, the leading member 31 is separated from the guide rail 4 by the spring force of the return spring 33 and returns to the original position.

As described above, the present invention
1. A guide rail provided on the wall of the hoistway along the moving direction of the car, a governor that detects the moving speed of the car by contacting the guide rail, and the car exceeds a predetermined speed by the governor. An elevator composed of a lifting switch that operates at times, a lifting mechanism that grips the guide rail by the operation of the lifting switch and lifts the emergency stop lifting rod, and an emergency stop device that operates by the pulled lifting rod. In the safety device, the operating force of the lifting switch is smaller than the emergency stop lifting rod lifting force of the lifting mechanism.
2. A guide rail provided on the wall of the hoistway along the moving direction of the car, a governor that detects the moving speed of the car by contacting the guide rail, and the car exceeds a predetermined speed by the governor. A pull-up switch that operates at times, a pull-up lever that applies an operating force to grip the guide rail and pull up the emergency stop pull-up rod by the operation of the pull-up switch, and an emergency stop device that operates by the pulled-up pull-up rod In the elevator safety apparatus, the pulling rod interlocked with the pulling lever is provided with a pulling mechanism having a roller for holding the guide rail, and the roller is lifted by the operation of the pulling lever. It is designed to enter a gap formed between the mechanism.
3. The pulling mechanism is configured so that the guide rail is sandwiched between two rollers, and the normal roller is expanded in the anti-guide rail direction by a spring.
4). A brake member rotatably supported by the pulling mechanism is provided, and the brake member enters a gap formed between the guide rail and the pulling mechanism by the operation of the pulling lever.
5. The pulling mechanism is configured so that the guide rail is clamped by two brake members, and the normal roller is expanded in the anti-guide rail direction by a spring.

It is a whole block diagram of the elevator apparatus provided with one Example of this invention. It is a figure which shows the governor provided with one Example of this invention. It is a figure explaining operation | movement of the governor provided with one Example of this invention. It is a figure explaining the raising mechanism provided with one Example of this invention. It is a figure explaining the raising mechanism provided with one Example of this invention. It is a figure explaining the raising mechanism provided with one Example of this invention. It is a figure explaining the raising mechanism provided with one Example of this invention. It is a whole elevator apparatus block diagram.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Riding car, 2 ... Emergency stop device, 3 ... Actuating lever, 4 ... Guide rail, 5,18 ... Governor, 6 ... Governor rope, 7 ... Governor sheave, 8 ... Hoisting machine, 9 ... Main rope, 10 ... Weight , 11 ... Lifting lever, 12, 23, 26, 30 ... Lifting rod, 13 ... Lifting mechanism, 14, 47 ... Emergency stop lifting rod, 15 ... Interlocking link member, 16 ... Pulley, 17 ... Isolation base, 19 ... Roller , 20, 29, 33 ... return spring, 21 ... link mechanism, 22, 25 ... pulling wedge part, 22a, 22b ... pulling wedge part friction surface, 24, 27b, 31a ... rotating fulcrum, 26a, 30a ... shaft, 27, 31 ... leading member, 27a, 31b ... long hole, 28, 32 ... lifting block, 34 ... governor pulley, 35 ... pendulum, 36 ... connecting rod, 37 ... switch lever, 3 DESCRIPTION OF SYMBOLS 8 ... Switch, 39 ... Lifting switch, 40 ... Plate, 41 ... Pressing spring, 42 ... Lifting lever, 44 ... Lifting spring, 45 ... Upper stopper, 46 ... Lower stopper

Claims (5)

A guide rail provided on the wall of the hoistway along the moving direction of the car, a governor that detects the moving speed of the car by contacting the guide rail, and the car exceeds a predetermined speed by the governor. An elevator composed of a lifting switch that operates at times, a lifting mechanism that grips the guide rail by the operation of the lifting switch and lifts the emergency stop lifting rod, and an emergency stop device that operates by the pulled lifting rod. In safety devices,
The elevator safety device according to claim 1, wherein an operating force of the lifting switch is smaller than an emergency stop lifting rod lifting force of the lifting mechanism. A guide rail provided on the wall of the hoistway along the moving direction of the car, a governor that detects the moving speed of the car by contacting the guide rail, and the car exceeds a predetermined speed by the governor. A pull-up switch that operates at times, a pull-up lever that applies an operating force to grip the guide rail and pull up the emergency stop pull-up rod by the operation of the pull-up switch, and an emergency stop device that operates by the pulled-up pull-up rod In an elevator safety device composed of
The pulling rod linked to the pulling lever is provided with a pulling mechanism having a roller for holding the guide rail, and the roller is moved into a gap formed between the guide rail and the pulling mechanism by the operation of the pulling lever. Elevator safety device characterized by entering. In the elevator safety device according to claim 2,
The pulling mechanism is configured to sandwich the guide rail by two rollers,
An elevator safety device characterized in that the normal roller is expanded in the anti-guide rail direction by a spring. In the elevator safety device according to claim 2,
An elevator safety device comprising: a brake member rotatably supported by the pulling mechanism; and the brake member enters a gap formed between the guide rail and the pulling mechanism by the operation of the pulling lever. In the elevator safety device according to claim 4,
An elevator safety device, wherein the pulling mechanism is configured to hold the guide rail between two brake members, and the normal roller is extended in the anti-guide rail direction by a spring.

Images