JP2022039637A - Method for pulling out safety rope from safety device of elevator gondola and safety rope release jig for the safety device - Google Patents

Abstract

To provide a method for pulling out a safety rope from a safety device of an elevator gondola that reduces the number of personnel involved in the work and can be performed by a single person.SOLUTION: By using a release jig comprising: a plate-shaped jig body 40 having a first hole 41 into which a release shaft 33 fits without idling and a second hole 42 for preventing rotation, into which a projection 34 formed on a case surface of a safety device 20 can fit; and fixing means 44 to prevent the jig body 40 from falling off when the release shaft 33 is turned to a released position with the release shaft 33 fitted in the first hole 41, the release jig is turned to switch the release shaft 33 to the released position with the release shaft 33 fitted into the first hole 41 of the release jig, the release jig is held in place by the fixing means 44 to prevent it from falling off, the projection 34 is fitted into the second hole 42 to hold the release jig from turning to the locked position, and finally a safety rope 12 is pulled out of the safety device 20 with the safety rope 12 released from a rope gripping mechanism.SELECTED DRAWING: Figure 3

Description

An embodiment of the present invention relates to a method of pulling out a safety rope from a safety device of an elevator gondola and a safety rope release jig of the safety device.

When an elevator is newly installed in a middle-high-rise building, a gondola is hung in the hoistway, and a worker rides on this gondola to install elevator equipment such as guide rails. This type of gondola is equipped with a transmission winch, and a worker can move the gondola in the hoistway while operating the transmission winch.

Further, the gondola is provided with a safety device for making an emergency stop so that the gondola does not fall when the transmission winch breaks down. A safety rope is passed through this safety device, and when the running speed of the safety rope exceeds the set value as the gondola falls, the built-in rope gripping mechanism operates to grab the safety rope and the gondola stops in an emergency. It has become.

By the way, the gondola will be dismantled and removed from the hoistway when the elevator construction progresses and the guide rails are installed. When removing the gondola, it is necessary to remove the safety rope from the safety device or wind the wire rope for the winch. As a prior art, for example, Patent Document 1 discloses a device for winding a safety rope of a gondola.

Japanese Patent Application Laid-Open No. 8-199802

In the safety device used in the gondola, if you try to pull out the safety rope quickly, the rope gripping mechanism may operate and you may not be able to pull out the safety rope. This is because the direction in which the safety rope is pulled out is also the direction in which the gondola falls for the safety device, so if you pull the safety rope in a hurry, the safety device will detect that the speed of the safety rope has exceeded the set value and grab the rope. This is because the mechanism operates.

Therefore, in order to remove the safety rope from the safety device, the safety rope must be removed while the rope gripping mechanism is kept open. Conventionally, the rope gripping mechanism of the safety device can be manually released, but for that purpose, the work of pulling out the safety rope requires at least two workers. That is, one person uses a tool to hold the rope gripping mechanism of the safety device in the open state, and the other person pulls out the safety rope. In this way, at least two people are forced to work, which is inefficient and requires improvement.
The present invention has been made in view of the problems of the prior art, and is safe from the safety device of the elevator gondola, which reduces the number of personnel for pulling out the safety rope from the safety device and allows even one worker to perform the work. It is an object of the present invention to provide a method for pulling out a rope and a safety rope release jig for the safety device.

In order to achieve the above object, the method of pulling out the safety rope from the safety device of the elevator gondola according to the embodiment of the present invention is to hold the gondola when the speed of the safety rope exceeds the set value. An emergency stop of the rope gripping mechanism and a release shaft that can rotate between the lock position where the rope gripping mechanism can be operated and the release position where the safety rope is released from the rope gripping mechanism. A method of pulling out the safety rope from the safety device having the safety device, wherein the first hole into which the release shaft fits without idling and the protrusion formed on the case surface of the safety device can be fitted to prevent rotation. A plate-shaped jig body having a second hole for the jig and the jig body are prevented from falling off when the release shaft is turned to the release position while the release shaft is fitted in the first hole. A release jig having the fixing means and the release jig is prepared, and the release jig is turned in a state where the release shaft is fitted in the first hole of the release jig to switch the release shaft to the release position. The release jig is held by the fixing means so as not to fall off, and the protrusion is fitted into the second hole to hold the release jig so as not to rotate to the lock position. Finally, the release jig is held. It is characterized in that the safety rope is pulled out from the safety device in a state where the safety rope is released from the rope gripping mechanism.

It is a perspective view which shows the outline of the gondola for an elevator to which an embodiment of this invention is applied. It is a perspective view which shows the gondola carried to the landing from a hoistway when removing a gondola. It is a perspective view which shows the release jig by this embodiment used to release the rope gripping mechanism of a safety device. It is a figure which shows the cross section of a release jig. It is a perspective view which shows the release jig in which the release shaft is fitted in a square hole. It is a perspective view which shows the situation which the release shaft was turned to the release position from the state of FIG. It is a perspective view which shows the situation which pushed in the release jig from the state of FIG.

Hereinafter, a method of pulling out the safety rope from the safety device of the elevator gondola according to the present invention and an embodiment of the safety rope release jig of the safety device will be described with reference to the attached drawings.
FIG. 1 is a diagram showing an outline of an elevator gondola to which an embodiment of the present invention is applied.

In FIG. 1, reference number 8 indicates an elevator hoistway, and reference number 10 indicates a gondola. In the construction of a new elevator, elevator equipment such as a guide rail for a car and a guide rail for a balance weight will be constructed by the gondola method in the hoistway 8 in the initial stage of construction. The gondola 10 is a hanging basket in which the handrail frame 14 is assembled in the four enclosures of the floor board base 15.

The gondola 10 is equipped with two electric winches 22. A wire rope 11 is wound around the electric winch 22, and the gondola 10 moves up and down in the hoistway 8 when the electric winch 22 winds up or unwinds the wire rope 11. Reference number 16 is an operation panel for operating the electric winch 22. A hook 5 is fixed to the ceiling of the hoistway 8, and the upper end of the wire rope 11 is fastened to the hook 5 via a stopper such as a shackle 7.

Apart from this wire rope 11, two safety ropes 12 are suspended from the ceiling of the hoistway 8 via a shackle 6. The safety rope 12 is passed through the emergency stop safety device 20 installed in the gondola 10, and extends to the lower part of the hoistway 8. A safety rope 12 is passed through this safety device 20, and when the traveling speed of the safety rope 12 exceeds the set value as the gondola 10 falls, the built-in rope gripping mechanism operates to grip the safety rope 12 and the gondola. 10 is designed to be emergency stopped.

Next, FIG. 2 is a diagram showing the gondola 10 carried from the hoistway 8 to the landing 32 when the gondola 10 is removed.

Since there is no scaffolding in the hoistway 8 that can be used for the removal work of the gondola 10 even after the guide rails for the car and the guide rails for the balance weight are installed, the gondola 10 is moved from the doorway 30 to the landing 32. Be carried out. Here, work such as pulling out the safety rope 12 and dismantling the gondola 10 is performed.

Here, FIG. 3 is a diagram showing a release jig 40 used to release the rope gripping mechanism of the safety device 20.
The safety device 20 is provided with a release shaft 33 so that the rope gripping mechanism can be released by manual operation. Here, the release means a state in which the rope gripping mechanism does not operate even if the traveling speed of the safety rope 12 exceeds the set value, and the safety rope 12 is free from the rope gripping mechanism. The release shaft 33 has a hexagonal shape like a bolt head, and protrudes from the case surface of the safety device 20. Conventionally, the release shaft 33 was rotated by a spanner, but in the present embodiment, a plate-shaped release jig 40 is used.

When the release shaft 33 is in the locked position, the rope gripping mechanism is not released. Normally, the release shaft 33 is in the locked position. In this embodiment, when the release shaft is turned clockwise by 30 degrees, the release position is switched and the rope gripping mechanism is released. In this case, the release shaft 33 is urged to return to the locked position by the elastic force of the built-in return spring, and returns to the locked position unless it is held by a spanner.

The release jig 40 is a jig for switching the release shaft 33 to the release position and holding it in the release position by using it in place of the conventionally used spanner. In this embodiment, it is composed of a rectangular metal plate. The release jig 40 is formed with a square hole (first hole) 41 into which the release shaft 33 can be fitted without idling. Further, the release jig 40 is formed with a hole (second hole) 42 into which the protrusion formed on the cover of the safety device 20 is fitted. In the embodiment, a nut 34 for fixing the cover of the safety device 10 is used as the protrusion. In the present embodiment, when the release jig 40 is turned clockwise 30 degrees, the holes 42 and the nut 40 are in phase with each other. The number of holes 42 is not limited to one, and may be multiple.

Here, FIG. 4 is a diagram showing a cross section of the release jig 40. A thin magnet 44 is attached to the back side of the release jig 40 (the side in close contact with the safety device 20) as a fixing means for preventing the release jig 40 from falling off. A rubber band 43 is also wound around the release jig 10 so as to cover the magnet 44. The rubber band 43 is wound to prevent the magnet 44 from falling off and to prevent the magnetic force of the magnet 44 from being attenuated by iron powder generated during the rope pulling operation.

The safety rope release jig 40 of the elevator gondola safety device 20 according to the present embodiment is configured as described above, and is then related to the procedure of the method of pulling out the safety rope 12 from the gondola safety device. The action and effect thereof will be described in.
As shown in FIG. 2, the work of pulling out the safety rope 12 from the safety device 20 is carried out by pulling the gondola 10 into the landing 32. In this embodiment, as described below, it is assumed that one person is used to pull out the safety rope 12 after releasing the rope gripping mechanism of the safety device 20 by using the release jig 40 shown in FIG. is doing.

In FIG. 3, the square hole 41 of the release jig 40 is fitted to the release shaft 33. FIG. 5 shows a release jig 40 in which a release shaft 33 is fitted in a square hole 41. At this time, the release jig 40 is shallowly fitted to the release shaft 33 so as not to be attracted to the surface of the safety device 10 by the magnet 44, and a gap is left between the release jig 40 and the surface of the safety device 20.

Next, in FIG. 6, when the release jig 10 is rotated clockwise by about 30 degrees, the release shaft 33 also rotates by the same angle, so that the rope gripping mechanism of the safety device 20 can be switched to the released state. At this time, the release shaft 33 receives the elastic force of the built-in return spring and tries to return to the locked position. Since the release jig 40 has a gap between the release jig 40 and the safety device 20, the magnet 44 is not attracted at this point.

Therefore, in FIG. 7, when the release jig 40 is pushed toward the safety device 20, the magnet 44 is attracted to the cover of the safety device 20. In the present embodiment, at the same time, the protrusion on the safety device 20 side, that is, the nut 42 is fitted into the hole 42 of the release jig 40. By fitting with this protrusion, the release jig 40 is reliably prevented from rotating and returning to the locked position. Moreover, since the release jig 40 is attracted to and fixed to the safety device 20 by the magnet 44, it is prevented from falling off, and the safety device 20 reliably maintains the released state.

When the safety device is in the released state, in FIG. 2, even if the worker quickly pulls the safety rope 12, the rope gripping mechanism does not operate, so that the worker can efficiently pull out the safety rope 12. During this period, as described above, the safety device 20 is kept in the released state by the release jig 40, so that it is possible to reduce the number of personnel who keep the safety device 20 in the released state as in the conventional case.

When the safety rope 12 is pulled out in this way, the gondola 10 is dismantled. Finally, the wire rope 11 and the safety rope 12 are designed to be wound while moving on the car.

The method of pulling out the safety rope from the safety device of the elevator gondola of the present invention and the safety rope release jig of the safety device have been described above with reference to suitable embodiments, and these embodiments are given as examples. However, it is not intended to limit the scope of the invention. Of course, the novel devices, methods and systems described herein can be implemented in various forms and can be variously omitted, replaced or modified without departing from the gist of the present invention. be. The claims and their equivalents are intended to cover embodiments or improvements thereof within the scope of the gist of the invention.

5 ... hook, 8 ... hoistway, 10 ... gondola, 6, 7 ... shackle, 11 ... wire rope, 20 ... safety device, 22 ... electric winch, 33 ... release shaft, 40 ... release jig, 41 ... first Hole, 42 ... second hole, 43 ... band, 44 ... magnet

Claims (6)

When the speed of the safety rope exceeds the set value, the safety rope is released from the rope gripping mechanism that makes the gondola emergency stop by gripping the safety rope, the lock position where the rope gripping mechanism can be operated, and the rope gripping mechanism. A method of pulling out the safety rope from a safety device having a release shaft that is rotatable between the release position and the release position that is in the released state.
A plate-shaped jig having a first hole into which the release shaft fits without idling, and a second hole for preventing rotation into which a protrusion formed on the case surface of the safety device can be fitted. A release jig having a main body and a fixing means for preventing the jig main body from falling off when the release shaft is turned to the release position while the release shaft is fitted in the first hole is prepared.
With the release shaft fitted in the first hole of the release jig, the release jig is turned to switch the release shaft to the release position.
The release jig is held by the fixing means so as not to fall off, and the protrusion is fitted into the second hole to hold the release jig so as not to rotate to the lock position.
Finally, a method of pulling out the safety rope from the safety device of the elevator gondola, which comprises pulling out the safety rope from the safety device in a state where the safety rope is released from the rope gripping mechanism. The method for pulling out a safety rope from a safety device for an elevator gondola according to claim 1, wherein the fixing means comprises a thin permanent magnet. The method for pulling out a safety rope from a safety device for an elevator gondola according to claim 2, wherein a rubber band member is wound around the jig body so as to cover the permanent magnet. The method for pulling out a safety rope from a safety device for an elevator gondola according to claim 1, wherein the protrusion is a part of a fastening member for fixing a cover of the safety device. The method of pulling out a safety rope from a safety device for an elevator gondola according to claim 4, wherein the position of the second hole of the release jig is in phase with the protrusion at the release position. When the speed of the safety rope exceeds the set value, the safety rope is released from the rope gripping mechanism that makes the gondola emergency stop by gripping the rope, the lock position where the rope gripping mechanism can be operated, and the rope gripping mechanism. A safety rope release jig used to manually rotate the release shaft in a safety device having a release shaft that is rotatable between the release position and the release position to be in a state of being.
A plate-shaped jig having a first hole into which the release shaft fits without idling, and a second hole for preventing rotation into which a protrusion formed on the case surface of the safety device can be fitted. With the main body
A fixing means for preventing the jig body from falling off when the release shaft is turned to the release position while the release shaft is fitted in the square hole.
A safety rope release jig used as a safety device for elevator gondola, which is characterized by having.

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