JP6072147B2 - Seismic remodeling method and seismic remodeling tool of governor tensioner - Google Patents

Description

  Embodiments described herein relate generally to a seismic remodeling method and a seismic remodeling tool for a governor tensioner.

  The elevator is provided with a governor device that operates when the moving speed of the car exceeds a specified speed and automatically stops the car. The governor sheave of the governor device is wrapped with a governor rope that travels in the same direction and at the same speed as the car moves up and down. A governor tensioner is suspended from the governor rope, and an appropriate tension is applied to the governor rope by the weight of the governor tensioner.

By the way, in recent years, the seismic standards of elevators are in a tendency to be strengthened. In particular, in an elevator installed in a high-rise building, when a long-period vibration is generated due to an earthquake, a long object such as a main rope or a governor rope may swing greatly due to resonance.
As for the governor rope, in the worst case, the governor device may be caught by equipment or structures installed in the hoistway or detached from the governor tensioner, and the governor device may not function.

  Therefore, in recent years, there has been provided a restraint that prevents the governor rope from swinging in the event of an earthquake, a lateral protector that prevents the governor rope from turning around and catching on the protrusions in the hoistway, and a governor rope from the sheave groove of the governor tensioner. Seismic standards such as providing guards and protective covers to prevent dislodging are established.

  Various improvements have been made in the governor tensioner to cope with such strengthening of earthquake resistance standards. For example, Patent Document 1 proposes a protective cover that prevents falling objects due to an earthquake from being sandwiched between a tensioner sheave and a governor rope. Patent Document 2 proposes a switch for detecting an abnormality of the governor rope.

JP 2012-6696 A JP 2009-7098 A

  If the elevator is renewed or refurbished, and the governor tensioner also satisfies the latest seismic standards and the customer's desired specifications, the governor rope's detachment prevention guard, protective cover, rope detachment detection switch, etc. are conventionally installed. The fact is that it is replaced with a new governor tensioner.

  The work of replacing the old governor tensioner with the new governor will be done in the bottom pit of the hoistway. The governor tensioner is quite heavy, and loading a new governor tensioner into a pit and unloading an old governor tensioner from the pit is a large work that requires a lot of labor and time.

  Also, because heavy objects are carried in and out of narrow pits where guide rails and various devices are installed, there is a risk that workers will be caught between the pit walls and the governor tensioner if the work procedure is incorrect. There is a safety problem. Furthermore, in order to update the governor tensioner itself, there is a problem that the cost for strengthening the earthquake resistance increases.

  The present invention has been made in view of the above-described problems of the prior art, and remodels the existing governor tensioner body and the governor tensioner that satisfies the latest earthquake resistance standards and customer specifications while diverting the weight as it is. It is an object of the present invention to provide a seismic remodeling method and a seismic remodeling tool for a governor tensioner that can be used.

  In order to achieve the above object, an earthquake-resistant modification method for a governor tensioner according to an embodiment of the present invention includes: a tensioner sheave around which a governor rope of an elevator governor is wound; and a weight that applies a necessary tension to the governor rope. A method of seismic remodeling of a governor tensioner that remodels the existing governor tensioner to enhance seismic resistance. In the pit at the bottom of the road, a seismic strengthening modification is added to the existing governor tensioner.

In addition, the seismic retrofit tool for the governor tensioner according to the embodiment of the present invention includes a tensioner sheave around which a governor rope of an elevator governor is wound, and a weight for applying a necessary tension to the governor rope. This is a seismic remodeling tool for a governor tensioner that is used for remodeling that enhances the performance, and includes a remodeling bracket that replaces the existing bracket that connects the existing governor tensioning member to the car guide rail, and an existing tensioner sheave. A sheave cover that protects and has a slip-off prevention of the governor rope from the tensioner sheave;
A first detection switch disposed on the remodeling bracket for detecting escape of the governor rope from the tensioner sheave; a second detection switch disposed on the remodeling bracket for detecting catch of the governor rope; And a cam member that is attached to the tensioner sheave and that operates the first detection switch and the second detection switch, respectively.

It is a figure which shows the outline | summary of the governor system of the elevator to which the earthquake-resistant modification method of the governor tensioner by 1st Embodiment of this invention is applied. It is a perspective view which shows the seismic retrofit tool used for the seismic retrofit method of the governor tensioner by 1st Embodiment of this invention. It is a perspective view which shows the existing governor tensioner before earthquake-resistant remodeling. It is a perspective view which shows the state which removed the bracket which connected the bracing plate to the car guide rail from the existing governor tensioner of FIG. It is a perspective view which shows the state which attached the bracket for a modification to the car guide rail. It is a perspective view which shows the governor tensioner which the earthquake-resistant modification was complete | finished. It is a perspective view which shows operation | movement of the rope removal detection switch attached to the governor tensioner. It is a perspective view which shows operation | movement of the rope hook detection switch attached to the governor tensioner. It is sectional drawing explaining the fixing method of the sheave cover by the earthquake-resistant modification method of the governor tensioner of 2nd Embodiment. It is a figure which shows the support bracket used with the seismic retrofit method of the governor tensioner by 3rd Embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a seismic remodeling method and a seismic remodeling tool for a governor tensioner according to the present invention will be described below with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a diagram showing an overview of a governor system for an elevator to which the seismic remodeling method for a governor tensioner according to the first embodiment of the present invention is applied.
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 the car guide rail 6.

  A machine room is installed at the top of the hoistway, and a speed governor 8 is installed in this machine room. A governor rope 12 is wound endlessly around a governor sheave 10 of the governor 8 and a tensioner sheave 15 of a governor tensioner 14 disposed at the lower part of the hoistway.

  The car 2 is provided with an emergency stop device 18 for holding the car guide rail 6 and stopping the car 2 in an emergency state when the rope gripping mechanism provided in the governor 8 grips the governor rope 12. It is provided for every six. The emergency stop device 18 is connected to each other by a safety link device 20. In this case, the safety link 22 is connected to the safety link 23 connected to the other safety device 18 via the link 24. The safety link 22 is connected to the governor rope 12 via the governor hitch 21.

In the governor tensioner 14, a tensioner weight 16 is suspended from the tensioner sheave 15. An appropriate tension is applied to the governor rope 12 by the tensioner weight 16 so that the governor rope 12 travels in the same direction and at the same speed as the elevator car 2 moves up and down.
In such a governor system, since the governor tensioner 14 is out of date, the governor tensioner 14 may be modified to meet the latest earthquake resistance standard when the latest earthquake resistance standard is not satisfied.

  Here, FIG. 2 is a perspective view showing the seismic remodeling tool used for the seismic remodeling method of the governor tensioner according to the present embodiment in a state where it is removed from the existing governor tensioner 14. FIG. 3 is a perspective view showing the governor 14 before remodeling.

  Before the earthquake-resistant modification, the car guide rail 6 and the tensioner sheave 15 are connected to each other by a restraining plate 26 that prevents the governor tensioner 14 from shaking when an earthquake occurs. A bracket 28 is fixed to the car guide rail 6 via a rail grip (not shown), and one end portion of the anti-vibration plate 26 is connected to the bracket 28. The other end of the anti-vibration plate 26 is fixed to the tensioner sheave 15 together with the weight connecting member 25 and the sheave shaft 27.

In such an existing governor tensioner 14, the latest seismic standards cannot be cleared only by providing the anti-vibration plate 26.
Therefore, in the present embodiment, the existing governor tensioner 14 is diverted, and an earthquake-resistant modification tool as shown in FIG.

  In FIG. 2, reference numeral 30 indicates a remodeling bracket newly attached to the car guide rail 6. The seismic retrofit bracket 30 is attached with the existing anti-vibration plate 26, and the rope hook detection switch 32A for detecting the hook of the governor rope 12 and the governor rope 12 are detached from the tensioner sheave 15 and the governor sheave 10 (see FIG. 1). This is a bracket for attaching the rope disengagement detection switch 32B for detecting the above.

  The rope hook detection switch 32A has a contact 33A and is held at the tip of the support arm 31A. A support arm 31B is attached below the support arm 31A, and a rope disengagement detection switch 32B having a contact 33B is held at the tip of the support arm 31B.

  When the contact 33A of the rope catching detection switch 32A comes into contact, the cam plate 41 that tilts the contact 33A and the cam plate 40 that contacts the contact 33B of the rope disengagement detection switch 32B and tilts it are arranged as an integral part. It is attached to the stop plate 26.

In this embodiment, sheave covers 35 and 37 are further provided as seismic retrofit tools newly attached to the tensioner sheave 15. The sheave cover 35 is a cover that covers the front surface of the tensioner sheave 15, and has an upper guard 36 that covers the tensioner sheave 15 like a ridge just above the tensioner sheave 15 and protects the tensioner sheave 15 from falling objects. Further, the sheave cover 35 is provided with detachment stoppers 38 and 38 for preventing the governor rope 12 from being detached from the tensioner sheave 15. On the other hand, the sheave cover 37 covers a range where the governor rope 12 is fitted in the sheave groove of the governor sheave 15.
Next, the procedure of the seismic remodeling method of the governor tensioner performed using the seismic remodeling tool as described above will be described with reference to FIGS.

  FIG. 3 shows the governor 14 before the seismic modification. In the seismic remodeling method of the present embodiment, the existing tensioner sheave 15 and the tensioner weight 16 are used as they are, and the seismic remodeling is carried out with the tensioner sheave 15 suspended by the governor rope 12 and using the pit as a work place.

First, in FIG. 3, the old bracket 28 that has fixed the restraining plate 26 to the car guide rail 6 is removed from the car guide rail 6. Then, as shown in FIG.
Next, as shown in FIG. 5, the new modification bracket 30 is attached to the car guide rail 6 using a rail grip (not shown) while the tensioner sheave 15 is suspended by the governor rope 12. At this time, the support arm 31A with the rope catching detection switch 32A and the support arm 31B with the rope disengagement detection switch 32B are attached to the remodeling bracket 30 in advance.

  The anti-vibration plate 26 used in the existing governor tensioner 14 is also diverted and left attached to the tensioner sheave 15. Then, the free end of the anti-vibration plate 26 is fastened to the remodeling bracket 30 using bolts and nuts. Cam plates 41 and 40 for operating the rope catching detection switch 32A and the rope disengagement detection switch 32B are attached to the bracing plate 26.

  Finally, as shown in FIG. 6, the sheave covers 35 and 37 are attached to the tensioner sheave 15. In this embodiment, the sheave cover 35 and the sheave cover 37 are assembled together and attached to the weight connecting member 25 using bolts and nuts. This completes the seismic modification of the governor tensioner 14.

According to the seismic retrofit method according to the present embodiment, the following effects can be obtained.
First, since the existing governor tensioner 14 can be used as it is, a large labor-intensive work such as loading a new governor tensioner into the pit and unloading the old governor tensioner from the pit as in the prior art becomes unnecessary. Moreover, since the existing governor tensioner 14 can be reused, the seismic retrofit cost can be greatly reduced.

  Moreover, since the remodeling work can be performed in the pit while the governor tensioner 14 is suspended by the governor rope 12, work such as mounting the remodeling bracket 30 and mounting the sheave covers 35 and 37 can be performed with good workability and safety. it can.

  By attaching the sheep covers 35 and 37, the tensioner sheave 15 is protected from falling objects and the like when an earthquake occurs. Further, the sheave cover 35 is provided with a stopper 38 for the governor rope 12. By adding such sheep covers 35 and 37 to the governor tensioner 14, the latest seismic standards are satisfied.

Next, the operation of the rope hook detection switch 32A and the rope disengagement detection switch 32B used in the seismic retrofit tool according to the present embodiment will be described.
Here, FIG. 7 is a diagram illustrating the operation of the rope disengagement detection switch 32B, and FIG. 8 is a diagram illustrating the operation of the rope catching detection switch 32A.
Normally, in the governor tensioner 14, the positional relationship between the rope catching detection switch 32A and the cam plate 41, and the rope disengagement detection switch 32B and the cam plate 40 are as shown in FIG.

  When the earthquake occurs, the governor rope 12 resonates with the long-period ground motion, and the governor rope 12 is detached from the tensioner sheave 15 or the governor sheave 10 (see FIG. 1). At this time, as indicated by an arrow in FIG. 7, the position of the entire governor tensioner 14 is lowered, and the lower cam plate 40 of the cam plates 40, 41 hits the contact 33 </ b> B of the rope disengagement detection switch 32 </ b> B and tilts it. It will be. As a result, a signal notifying the abnormality that the governor rope 12 has come off is transmitted to a control panel (not shown). On the other hand, if the governor rope 12 is not disengaged, the rope disengagement detection switch 32B does not come into contact with the cam plate 40, so that no abnormal signal is issued.

  Similarly, when the governor rope 12 is caught by a protrusion or the like in the hoistway due to the occurrence of long-period vibration, the position of the entire governor tensioner 14 is raised as shown by the arrow in FIG. 41 hits the contact 33A of the rope catching detection switch 32A and knocks it down.

  As a result, a signal notifying the abnormality that the governor rope 12 has been caught by a projection or the like in the hoistway is issued. On the other hand, if the governor rope 12 is not caught, an abnormal signal is not issued.

  When a large earthquake occurs, the moving elevator stops the car at the nearest floor and the elevator operation stops. Depending on the customer specifications, after the earthquake stops, the elevator's determined inspection items are automatically diagnosed for any abnormalities. If there are no abnormalities, the elevator will automatically resume operation quickly and automatically. An automatic diagnostic system may be employed.

  The rope hook detection switch 32A and the rope disengagement detection switch 32B described above can be easily incorporated into an automatic return automatic diagnosis system for customer-specific elevators, and therefore can satisfy customer specifications with enhanced earthquake resistance. .

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a diagram showing a fixing method of the sheave cover 35 in the earthquake-resistant modification method according to the second embodiment.
As shown in FIG. 9, the sheave cover 35 that protects the tensioner sheave 15 is fixed between the flange portion of the sheave shaft 27 and the tensioner sheave 15 via a collar 43. Therefore, when the sheave cover 35 is newly installed on the existing tensioner sheave 15, the sheave shaft 27 is pulled out, the collar 43 is sandwiched between the sheave cover 35 and the tensioner sheave 15, and then the sheave shaft 27 is inserted. The cover 35 can be easily attached to the tensioner sheave 15.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.

  The embodiment described above is an embodiment in which the retrofit bracket 30 is attached to the car guide rail 6 and the existing governor tensioner 14 is seismically modified.

  On the other hand, the third embodiment is an embodiment in which it is assumed that the position of the governor tensioner 14 needs to be moved from the existing position, and the remodeling bracket 30 is not used.

  In FIG. 10, the position indicated by the dotted line is the existing position of the governor tensioner 14. Along with construction such as seismic reinforcement of buildings, there are cases where the existing position is limited and the position of the governor tensioner 14 must be moved horizontally to the position of the solid line.

  In this case, instead of the remodeling bracket 30 of the first embodiment, the support bracket 45 is erected on the floor surface of the pit, and the existing bracing plate 26 (not shown) is connected to the support bracket 45 to the governor sheave 15. I have to. Even if such a support bracket 45 is used, modification can be performed while the governor tensioner 14 is suspended by the governor rope 12, and the restriction on the installation position can be relaxed.

  As described above, the seismic remodeling method and the seismic remodeling tool for the governor tensioner according to the present invention have been described with reference to the preferred embodiments. It is not a thing. 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 ... Ride car, 4 ... Main rope, 6 ... Car guide rail, 8 ... Speed governor, 10 ... Governor sheave, 12 ... Governor rope, 14 ... Governor tensioner, 15 ... Tensioner sheave, 16 ... Tensioner weight, 18 ... Emergency stop device , 25 ... Weight connecting member, 26 ... Anti-rest plate, 28 ... Bracket, 27 ... Sheave shaft, 30 ... Remodeling bracket, 32A ... Rope hook detection switch, 32B ... Rope disconnection detection switch, 32A ... Contact, 32B ... Contact Child, 35 ... Sheave cover, 37 ... Sheave cover

Claims (6)

A governor tensioner seismic remodeling method for remodeling a governor tensioner having a tensioner sheave around which a governor rope of an elevator governor is wound and a weight for applying a tension necessary for the governor rope, to reinforce the seismic resistance,
The existing governor tensioner sheave and weight are used as they are, and the tensioner sheave is suspended by the governor rope, and the seismic strengthening modification is added to the existing governor tensioner in the pit at the bottom of the hoistway. Seismic retrofit method for governor tensioners. Remove the bracket that connects the existing governor tension member from the car guide rail, replace it with the remodeling bracket, attach the remodeling bracket to the car guide rail, and attach the remodeling bracket to the remodeling bracket from the tensioner sheave of the governor rope. The seismic remodeling method for a governor tensioner according to claim 1, wherein a first detector for detecting the escape of the cable and / or a second detector for detecting catching of the governor rope are arranged.   3. A method for retrofitting a governor tensioner according to claim 1, wherein a sheave cover for protecting the tensioner sheave is attached to the tensioner sheave. The sieve cover, claim 3, characterized in that it is fixed by held between the anti-removal of the governor rope is attached or flange portion and the tensioner sheave sheave shaft of the tensioner sheave, from the tensioner sheave Seismic retrofit method for the governor tensioner described in 1.   In the case where the position of the governor tensioner is moved to a position different from that before the remodeling, a support bracket for connecting the bracing member is erected on the floor surface of the pit instead of the remodeling bracket. A method for retrofitting the governor tensioner according to claim 2. A governor tensioner seismic remodeling tool used for remodeling to strengthen the seismic resistance of an existing governor tensioner having a tensioner sheave around which a governor rope of an elevator governor is wound and a weight for applying tension necessary for the governor rope. And
A retrofit bracket that replaces the existing bracket that connects the existing governor tensioner's brace to the car guide rail;
A sheave cover that protects an existing tensioner sheave and has a stopper for the governor rope from coming off the tensioner sheave;
A first detection switch disposed on the remodeling bracket for detecting escape of the governor rope from the tensioner sheave;
A second detection switch disposed on the remodeling bracket and detecting catching of the governor rope;
A seismic remodeling tool for a governor tensioner, comprising a cam member attached to the tensioner sheave and actuating each of the first detection switch and the second detection switch.

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