JP5744291B1 - Elevator governor - Google Patents

Abstract

[PROBLEMS] To operate an elevator with different rated speeds in the ascending direction and the descending direction in a single speed governor in an elevator in which the rated speed when the car is raised and the rated speed when the car is lowered are different. To be able to. SOLUTION: A descending governor sheave 10 provided coaxially with an ascending governor sheave 9 and set with an overspeed when a car 2 descends, and an ascending governor rope wound around the ascending governor sheave 9. A first wedge-shaped coupling pair that couples 15 to the safety link 35, and a second wedge-shaped coupling pair that couples the lowering governor rope 14 wound around the lower governor sheave 10 to the safety link 35. The governor hitch means 38 is provided. Then, the first wedge-type coupling pair and the second wedge-type coupling pair are placed in opposite postures, and the ascending-side governor rope 15 and the descending-side governor rope 14 are coupled to the safety link 35, respectively. The governor sheave 10 and the ascending governor sheave 9 are configured to set different operation speeds. [Selection] Figure 1

Description

  Embodiments described herein relate generally to an elevator governor.

  In an elevator, it is required by law to provide an emergency stop system equipped with a speed governor as a safety device (Article 129-10 of the Building Standards Law Enforcement Ordinance). This governor is a device that operates when the moving speed of the car exceeds a prescribed value and automatically stops the car.

  Here, FIG. 5 is a diagram showing a schematic configuration of an emergency stop system using a conventional speed governor in a general elevator.

  In FIG. 5, reference numeral 2 indicates an elevator car. The car 2 is suspended by a main rope 4 and is driven by a hoisting machine (not shown) to move up and down in the hoistway while being guided by guide rails 6 provided in the hoistway.

  A speed governor 8 is installed in the machine room. The governor 8 includes a governor sheave 10 and a limit switch 13 that operates when the moving speed of the car 2 exceeds a set value or a moving speed of the car 2 is set. A rope gripping mechanism 16 is provided for gripping the governor rope 14 that travels integrally with the car 2 when the overspeed is exceeded.

  The car 2 is provided with an emergency stop device 18 for emergency stop of the car 2. The emergency stop device 18 is provided with a guide rail 6 when the main rope 4 is cut or the speed of the hoisting machine becomes abnormal and the speed of the elevator car 2 exceeds a set overspeed. Is a device for mechanically stopping the car 2 mechanically.

  The governor rope 14 is wound endlessly around the governor sheave 10 of the governor body 8 and the sheave 20 of the governor tensioner disposed at the lower part of the hoistway 4. A weight 21 is suspended from the sheave 20 of the governor tensioner to apply tension to the governor rope 14.

  The governor rope 14 is connected via a governor hitch 22 to a safety link 35 that operates the safety device 18, and the governor rope 14 is in the same direction and at the same speed as the elevator car 2 moves up and down. It is supposed to run. Reference numeral 24 indicates the steady rest of the governor rope 14.

  When it is detected that the predetermined overspeed has been exceeded from the rotation of the governor sheave 10 when the car 2 is descending, the limit switch 13 is activated, the power of the hoisting machine is shut off, and the hoisting machine The car 2 is stopped by the brake device.

  Usually, the car 2 stops at this stage, but the car 2 may continue to descend even if the hoisting machine stops, such as when the main rope 4 is cut. When the descending speed of the car 2 increases and reaches a preset overspeed, the rope gripping mechanism 16 of the governor 8 grips the governor rope 14 and the governor rope 14 is forcibly stopped. As a result, as the car 2 is lowered, the safety link 35 is pulled up, and the safety link 36 is pulled down via the connecting link 37 to operate all the emergency stop devices 12, so that the car 2 is brought to an emergency stop. be able to.

  By the way, in recent years, the speed of an elevator installed in a skyscraper has been remarkably increased. In an elevator of a skyscraper, rapid pressure fluctuations occur in the car by operating the car at high speed. As a result, passengers often feel discomfort in their ears due to pressure differences inside and outside the eardrum.

  In particular, when it comes to an ultra-high speed elevator, the ear feels more uncomfortable during descending operation than during ascending operation, so the rated speed when descending is slower than the rated speed when ascending. A technique has been proposed in which two speed governors, a speed governor for ascending and a speed governor for descending, are used to set different operating speeds when rising and when descending (for example, Patent Documents) 1).

JP 2000-327241 A

  With a conventional elevator governor, only one operating speed corresponding to one rated speed can be set for one governor. In the case of an ultra-high speed elevator in which the rated speed when the car is rising and the rated speed when the car is descending are different, the operating speed is set for the rated speed of the higher speed. For this reason, there is a problem that either one of the ascending and descending cannot be operated at the setting of the originally desired operation speed.

  The present invention has been made in view of the problems of the prior art, and the rated speed when the car is raised and the rated speed when the car is lowered are different from each other in an elevator or a single governor. Another object of the present invention is to provide an elevator governor that can be operated by setting different operation speeds in the ascending direction and the descending direction.

  To achieve the above object, an elevator governor according to an embodiment includes a governor sheave around which a governor rope is wound, and a governor including a rope gripping mechanism that grips the governor rope. Elevator speed control that connects one end of the governor rope to a safety link that operates an emergency stop device provided on the car, and stops the car when the speed of the car exceeds a predetermined overspeed. Machine. This governor is provided with an up-side governor sheave in which an overspeed when the car ascends is set, and a descent in which an overspeed is set up coaxially with the upside governor sheave. Side governor sheave, a first wedge-type coupling pair that couples the ascending governor rope wound around the ascending governor sheave to the safety link, and a descending governor wrapped around the descending governor sheave And a second wedge-shaped connection pair for connecting a rope to the safety link, and a governor hitch means. Then, the first wedge-type connection pair and the second wedge-type connection pair are placed in opposite postures, and the ascending-side governor rope and the descending-side governor rope are respectively connected to the safety link, and the descending It is configured to set different operation speeds for the side governor sheave and the rising side governor sheave.

It is a figure which shows embodiment of the governor of the elevator by this invention. It is a perspective view which shows the governor hitch means with which the governor of the elevator by embodiment is provided. It is a side view which shows operation | movement of the governor hitch means when a car raises. It is a side view which shows operation | movement of the governor hitch means when a car descends. It is a side view of the conventional governor of an elevator.

Hereinafter, an embodiment of an elevator governor according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram showing a configuration of an elevator governor according to a first embodiment of the present invention. In FIG. 1, reference numeral 2 indicates an elevator car. The car 2 is suspended by a main rope 4 and is driven by a hoisting machine (not shown) to move up and down in the hoistway while being guided by guide rails 6 provided in the hoistway.

  A speed governor 8 is installed in the machine room installed at the top of the hoistway. The governor 8 according to this embodiment includes two governor sheaves 9 and 10 coaxially. Among these, one governor sheave 9 is a governor sheave that detects an overspeed in an operation in which the car 2 is lifted (hereinafter referred to as a rising-side governor sheave 9). On the other hand, the other governor sheave 10 is a governor sheave that detects an overspeed in an operation in which the car 2 descends (hereinafter referred to as a descending governor sheave 10).

  The ascending-side governor sheave 9 and the descending-side governor sheave 10 are provided with a rotating weight (not shown) for detecting a speed that is opened by a centrifugal force when rotating. An overspeed can be set by adjusting the rotary weight.

  In the elevator of this embodiment, the rated speed Vu when the car 2 is raised is set to a speed larger than the rated speed Vd when the car 2 is lowered, and the rated speed Vu is set to be higher. This is to alleviate the ear discomfort given to the passengers due to fluctuations in atmospheric pressure when descending.

  Further, in the ascending side governor sheave 9 and the descending side governor sheave 10, the governor ropes are respectively wound around. In this case, the governor rope 15 on the ascending side is wound around the ascending side governor sheave 9 and the sheave 20 of the governor tensioner disposed at the lower part of the hoistway 4 in an endless manner. The descending governor rope 14 is wound around the descending governor sheave 9 and the sheave 22 coaxial with the sheave 20. Reference numeral 21 indicates a weight that is suspended by the governor tensioner in order to give appropriate tension to the descending governor rope 14 and the ascending governor rope 15.

  The ascending governor sheave 9 of the governor 8 is provided with a rope gripping mechanism 11 that grips the ascending governor rope 15 when a set overspeed is detected. 10 is also provided with a rope gripping mechanism 12 for gripping the descent side governor rope 14.

  In the car 2, the speed governor 8 operates during the descending operation, and the speed governor 8 operates when the rope gripping mechanism 12 of the descending governor sheave 10 grips the descending speed governor rope 14 or during the ascending operation. When the rope gripping mechanism 11 of the ascending governor sheave 9 is gripped by the ascending governor rope 15, an emergency stop device 18 that sandwiches the guide rail 6 to emergency stop the car 2 is provided for each guide rail 6. Is provided. The safety links 35 for operating the safety devices 18 are connected to the safety links 36 connected to the other safety devices 18 via links 37.

  Corresponding to the difference in the rated speed between the ascending operation and the descending operation of the car 2, in the descending governor sheave 10, the overspeed at which the emergency stop device 18 is operated is based on the rated speed Vd when descending. It is set to about 1.4 times Vd. Similarly, in the higher-side governor sheave 9 on the higher speed side, an overspeed for operating the emergency stop device 18 is set on the basis of the rated speed Vu for ascent.

  In this embodiment, the following governor hitch means 38 is provided to connect the safety link 35 to the descending governor rope 14 and the ascending governor rope 15.

  Here, FIG. 2 shows a configuration of the governor hitch means 38. In this governor hitch means 38, conical wedge coupling bodies 42 and 43 and conical cylindrical receiving members 40 and 41 are combined to form two wedge-shaped coupling pairs.

  In this case, the combination of the receiving member 40 and the wedge coupling body 42 fitted coaxially thereto constitutes a first wedge coupling pair for coupling the ascending speed governor rope 15 and the safety link 35. The receiving member 41 and the wedge coupling body 43 fitted coaxially therewith are combined to constitute a second wedge coupling pair for coupling the descending governor rope 14 and the safety link 35.

  As shown in FIG. 2, a wedge coupling body 42 is fixed to the ascending governor rope 15 concentrically with the rope with the top of the cone facing downward. The receiving member 40 is attached to the front end portion of the safety link 35 through a bracket 39 so that the conical top portion thereof faces downward.

  On the other hand, a wedge coupling body 43 is fixed to the descending speed governor rope 14 concentrically with the rope with the top of the cone facing upward. The receiving member 41 is attached to the distal end portion of the safety link 35 in such a posture that the conical top portion is directed upward. Thus, the lower side governor rope 14 and the upper side governor rope 15 are in a reverse posture in which the wedge-shaped connection pair is inverted in the relationship between the wedge member and the receiving member.

  The elevator governor according to the present embodiment is configured as described above. Next, its operation and effects will be described.

  In FIG. 1, when the car 2 rises, the ascending governor rope 15 travels upward at the same speed as the car 2. That is, in the case of the ascending operation at the rated speed, as shown in FIG. 3, the receiving member 40 that forms the first wedge-shaped coupling pair together with the raising of the car 2, and the wedge coupling body 42 include It will be in a state of fitting. As a result, the ascending governor rope 15 follows the movement of the car 2 and travels upward at the same speed. During this time, in the governor 8, the ascending governor sheave 9 rotates together with the ascending governor rope 15, and the speed of the car 2 can be accurately transmitted to the ascending governor sheave 9. The descending governor sheave 10 also rotates together with the ascending governor sheave 9, and the descending governor rope 14 travels upward.

  When an overspeed state is detected from the rotation of the governor sheave 10 in the governor 8 while the car 2 is moving up, a limit switch (not shown) provided in the governor 8 is activated, and the hoisting machine Power is cut off. At the same time, the brake device of the hoisting machine works and the car 2 stops.

  In a situation where some sort of failure has occurred in the hoist, the car 2 may not stop and may continue to rise while increasing speed. When the speed of the car 2 further increases and the overspeed set by the ascending governor sheave 9 is detected, the rope gripping mechanism 11 of the governor 8 grasps the ascending governor rope 15 and this ascending speed governor. The machine rope 15 is forcibly stopped. As shown in FIG. 3, when the car 2 tries to move upward at this time, the wedge coupling body 42 is fitted into the receiving member 40 and the wedge is effective, and the safety link 35 is moved in the direction of arrow A. Be lowered. As a result, the emergency stop device 18 operates, so that the car 2 can be brought to an emergency stop.

  During this time, in the descending side governor rope 14, the wedge coupling body 43 and the receiving member 41 are reversed in the opposite direction, the wedge coupling body 42 and the receiving member 40 of the ascending side governor rope 15. The wedge action does not work and is not involved in the operation of the safety device 18 at all. In this way, when the elevator is lifted, it is possible to make the speed governor 8 function at an overspeed set based on the rated speed Vu during the lift using only the climbing speed governor rope 15. Become.

Next, the operation of the present embodiment during the elevator descent operation will be described.
In FIG. 1, it is assumed that the rated speed Vd of the car 2 is set to a speed slower than the rated speed Vu when the elevator 2 is descending. In the descent operation, the descent side governor rope 14 travels downward at the same speed as the car 2. In other words, in the descending operation at the rated speed, as shown in FIG. 4, the receiving member 41 that forms the second wedge-shaped coupling pair together with the lowering of the car 2, and the wedge coupling body 43 include It will be in a state of fitting. As a result, the descending governor rope 14 follows the movement of the car 2 and travels downward at the same speed. During this time, in the governor 8, the descending governor sheave 10 rotates together with the descending governor rope 14, and the speed of the car 2 can be accurately transmitted to the descending governor sheave 10.

  When the overspeed state is detected from the rotation of the descending governor sheave 10 in the governor 8 while the car 2 is descending, a limit switch (not shown) provided in the governor 8 is operated to The machine is turned off. At the same time, the brake device of the hoisting machine works and the car 2 stops.

  In the unlikely event that the main rope 4 is cut, the car 2 may continue to descend while increasing its speed even if the hoisting machine stops. When the descending speed of the car 2 further increases and the overspeed set by the descending governor sheave 10 is detected, the rope gripping mechanism 12 of the governor 8 grips the descending governor rope 14 and forces it. Will stop. As shown in FIG. 4, when the car 2 tries to move downward at this time, the wedge coupling body 43 is fitted into the receiving member 41 and the wedge is effective. The safety link 35 is pulled up in the direction of arrow B. As a result, the emergency stop device 18 operates, so that the car 2 can be brought to an emergency stop.

  During this time, in the direction of the ascending speed governor rope 15, the wedge connecting body 42 and the receiving member 40 are reversed in the reverse direction, the wedge connecting body 43 and the receiving member 41 of the descending side speed governor rope 14. The wedge action does not work and is not involved in the operation of the safety device 18 at all. In this way, when the elevator is lowered, only the descent side governor rope 14 is used, and the excess speed set based on the rated speed Vd at the time of descent is adjusted without matching with the rated speed Vu at the time of high-speed ascent. It becomes possible to make the governor 8 function at a speed.

  In FIG. 1, a buffer 25 is provided in the lowermost pit of the hoistway for buffering the collision of the car 2. As described above, the speed governor operating speed at the time of lowering can be set in accordance with the rated speed Vd at the time of lowering. Therefore, there is an advantage that the setting of the buffer 25 does not need to be adjusted at the time of the higher speed rising.

  As described above, according to the present embodiment, the elevator governor rope 15 is used during the elevator ascending operation, and the descending governor rope 14 is used during the descending operation. Since the speed governor rope can be used properly depending on the direction in which the car 2 travels with the speed governor, when the rated speed differs between the ascending operation and the descending operation, the speed governor should be operated according to the rated speed. Is possible.

  In the embodiment, an explanation has been given of an elevator in which the rated speed Vu during the ascending operation is higher than the rated speed Vd during the descent, but the present invention is not necessarily limited thereto.

  The elevator speed governor according to the present invention has been described with reference to preferred embodiments. However, these embodiments are given as examples and are not intended to limit the scope of the invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

2 ... Riding car, 4 ... Main rope, 6 ... Guide rail, 8 ... Speed governor, 9 ... Ascending side governor sheave, 10 ... Descent side governor sheave, 11 ... Rope grasping mechanism, 12 ... Rope grasping mechanism, 14 ... Declining side adjustment Speed rope, 15 ... Ascending side governor rope, 18 ... Emergency stop device, 35 ... Safety link, 38 ... Governor hitch means, 40, 41 ... Receiving member, 42, 43 ... Wedge coupling

Claims (3)

A governor sheave around which the governor rope is wound, and a governor having a rope gripping mechanism for gripping the governor rope, and operating an emergency stop device provided with one end of the governor rope on the car In the elevator governor, which is connected to the safety link and emergency stops the car when the speed of the car exceeds a predetermined overspeed,
The governor sheave on the rising side where the overspeed when the car rises is set,
A descending governor sheave that is provided coaxially with the ascending governor sheave and overspeed is set when the car descends;
A first wedge-shaped connection pair for connecting an ascending governor rope wound around the ascending governor sheave to the safety link, and a descending governor rope wrapped around the descending governor sheave as the safety link. A second wedge-shaped coupling pair coupled to the first and second governor hitch means,
The first wedge-type coupling pair and the second wedge-type coupling pair are placed in opposite postures, and the ascending-side governor rope and the descending-side governor rope are coupled to the safety link, respectively, An elevator governor characterized in that different operating speeds are set for the governor sheave and the ascending governor sheave.   The first wedge-type connection pair and the second wedge-type connection pair are each attached to a conical wedge connection body concentrically fixed to a governor rope and the safety link, and the wedge connection body is coaxial. 2. The elevator governor according to claim 1, wherein the governor is composed of a wedge-coupled pair of the same shape in combination with a conical cylindrical receiving member to be fitted. In the first wedge-type coupling pair, the wedge coupling body is fixed to the ascending-side governor rope so that the conical top portion faces downward, and the receiving member is the safety link so that the conical top portion faces downward. Attached to the
In the second wedge-type coupling pair, the wedge coupling body is fixed to the descending speed governor rope so that the cone top portion faces upward, and the receiving member is the safety link so that the cone top portion faces upward. The elevator governor according to claim 2, wherein the elevator governor is attached to the elevator.

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