JP6351546B2 - Elevator repair method - Google Patents

Description

  The present invention relates to an elevator repair method for repairing an elevator equipped with an emergency stop device for emergency stopping a car.

  Conventionally, the hoistway is wound over the hoistway, the governor provided at the upper part of the hoistway, the governor tensioner provided at the lower part of the hoistway, and the governor and governor tensioner. A governor device having a governor rope that is hung and connected to the car and circulates in conjunction with the raising and lowering of the car, an emergency stop lever that is pivotally provided on the car and connected to the governor rope, and an emergency There is a braking part that hits the guide rail for the car in conjunction with the rotation of the stop lever, and when the car falls, the emergency stop lever rotates by stopping the circulating movement of the governor rope, and the braking part 2. Description of the Related Art An elevator including an emergency stop device that makes an emergency stop by hitting a car guide rail is known (see, for example, Patent Document 1).

JP 2011-246241 A

  However, when the existing governor device is replaced, the car and governor rope are disconnected, so if the car falls with the car and governor rope disconnected, the car will be emergency stopped. There was a problem that it could not be made.

  This invention provides the repair method of the elevator which can carry out an emergency stop more reliably.

The elevator renovation method according to the present invention includes a governor device having a governor rope connected to a car and circulated in conjunction with the raising and lowering of the car. An elevator refurbishing method for replacing a governor device in an elevator having an emergency stop lever that is provided and has an emergency stop lever connected to a governor rope and that makes an emergency stop by hitting a car guide rail. , A governor rope separation process to separate the emergency stop lever from the governor rope, and a retractor type fall prevention device with a reel and a strap wound around the reel is installed in the hoistway, and the strap is connected to the emergency stop lever After the retractor-type crash prevention device installation process, the governor rope separation process and the retractor-type crash prevention instrument installation process, the governor device is replaced. A that governor device replacement step, the retractor type crash blocking device placing step, if the car to be less than the rate at which the rotational speed of the reel is set in advance is lowered, the position of the emergency stop lever When the car is lowered so that the reel rotation speed is equal to or higher than the preset speed, the strap is attached to the emergency stop lever so that the position of the emergency stop lever is displaced from the release position to the stop position. Connected .

  According to the elevator refurbishment method according to the present invention, the retractor-type crash prevention device is installed in the hoistway, and the speed governor device is replaced with the strap connected to the emergency stop lever. When the car falls in the separated state, the emergency stop lever rotates and the emergency stop device causes the car to make an emergency stop. Thereby, an emergency stop can be carried out more reliably.

It is a side view which shows the elevator renovated by the elevator renovation method which concerns on Embodiment 1 of this invention. It is a side view which shows a mode that the elevator of FIG. 1 is repaired. It is an enlarged view which shows the safety block of FIG.

Embodiment 1 FIG.
1 is a side view showing an elevator refurbished by an elevator renovation method according to Embodiment 1 of the present invention. In the figure, in this example, the elevator refurbished by the elevator refurbishing method is a winding drum type elevator. The elevator is connected to a car 1 that moves up and down the hoistway 100, a car guide rail 2 that is raised on the hoistway 100 and guides the car 1, a car elevating device 3 that elevates and lowers the car 1, and the car 1. A speed governor device 4 and an emergency stop device 5 for emergency stopping the car are provided.

  The car lifting / lowering device 3 is provided on the upper part of the hoistway 100, the driving part 31 having a sheave, the main rope 32 having one end wound around the sheave and the other end connected to the upper part of the car 1, The rope 32 has a pair of suspension wheels 33 wound around from above. When the drive unit 31 is driven, the main rope 32 is wound around the sheave or sent out from the sheave. When the main rope 32 is wound around the sheave, the car 1 is raised. On the other hand, the car 1 is lowered by the main rope 32 being sent out from the sheave.

  The speed governor device 4 includes a speed governor 41 provided in the upper part of the hoistway 100, a speed governor tension vehicle 42 provided in the lower part of the hoistway 100, and the speed governor 41 and the speed governor tensioner 42. Fixed to the upper part of the guide rail 2 for the car, the governor support part 44 for supporting the governor 41, and the lower part of the guide rail 2 for the car. And a governor tensioner support portion 45 that supports the governor tensioner 42.

  The emergency stop device 5 includes an emergency stop device main body 51 fixed to the car 1 so as to be adjacent to the car guide rail 2, a stop position pressed against the car guide rail 2, and a release position separated from the car guide rail 2. And a lifting rod 53 connected to the governor rope 43 and the emergency stop lever 52. The emergency stop lever 52 is connected to the governor rope 43 via the pulling bar 53.

  When the position of the emergency stop lever 52 is the stop position, the emergency stop lever 52 hits the car guide rail 2 and the emergency stop main body 51 and the emergency stop lever 52 sandwich the car guide rail 2. The car 1 is stopped when the emergency stop device main body 51 and the emergency stop lever 52 sandwich the car guide rail 2. The emergency stop lever 52 is provided so as to be rotatable with respect to the car 1. The emergency stop lever 52 is displaced between the stop position and the release position by rotating.

  FIG. 2 is a side view showing how the elevator shown in FIG. 1 is repaired. When repairing the elevator, a safety block (retractor-type crash prevention device) 6 for emergency stop of the car 1 is used. FIG. 3 is an enlarged view showing the safety block 6 of FIG. The safety block 6 includes a mounting plate 61 fixed to the car guide rail 2, a reel 62 supported by the mounting plate 61, and a strap 63 having a base end wound around the reel 62. The safety block 6 further includes a spring (not shown) that is provided on the reel 62 and biases the reel 62 in a direction in which the strap 63 is wound around the reel 62. The strap 63 is fed out from the reel 62 by pulling the strap 63 in the direction in which the strap 63 is fed out from the reel 62 against the biasing force of the spring. The strap 63 includes a spring portion 631 that expands and contracts in the longitudinal direction. A pulling rope (not shown) is connected to the strap 63.

  The reel 62 further includes a rotation blocking unit (not shown) that blocks the rotation of the reel 62 when the rotation speed of the reel 62 exceeds a preset value. Accordingly, when the strap 63 is pulled in a direction in which the strap 63 is fed out from the reel 62 at a speed equal to or higher than a preset speed, the feeding from the reel 62 is stopped.

  The tip of the strap 63 is connected to the emergency stop lever 52. When the car 1 is lowered so that the rotation speed of the reel 62 is less than a preset speed, the position of the emergency stop lever 52 becomes the release position against the urging force of the spring of the safety block 6. On the other hand, when the car 1 is lowered so that the rotational speed of the reel 62 becomes equal to or higher than a preset speed, the feeding of the strap 63 from the reel 62 is stopped. Displace from the release position to the stop position. As a result, the car 1 is stopped.

  Next, an elevator repair method will be described. First, the emergency stop lever 52 and the governor rope 43 are separated (the governor rope separating step).

  Thereafter, the safety block 6 having the reel 62 and the strap 63 wound around the reel 62 is installed in the hoistway 100, and the tip of the strap 63 is connected to the emergency stop lever 52 (retractor-type fall prevention device installation step). In the retractor-type crash prevention device installation step, the reel 62 is fixed to the car guide rail 2 via the mounting plate 61. Further, in the retractor type fall prevention device installation process, an operator who has entered the pit of the hoistway 100 grabs the pulling rope and extends the strap 63 downward, and connects the strap 63 to the emergency stop lever 52.

  Thereafter, the governor 41 is replaced (governor device replacement step).

  In the governor device replacement process, the drive unit 31 is driven to raise and lower the car 1 (car raising / lowering process). Members required for elevator repair are placed on the car 1 and moved up and down. This completes the elevator repair.

  As described above, according to the elevator repair method according to the first embodiment of the present invention, the speed governor device with the safety block 6 installed in the hoistway 100 and the strap 63 connected to the emergency stop lever 52. 4, when the car 1 falls with the car 1 and the governor rope 43 disconnected, the emergency stop lever 52 rotates and the emergency stop device 5 makes the car 1 emergency stop. Thereby, the car 1 can be emergency-stopped more reliably.

  Further, since the strap 63 includes a spring portion 631 that expands and contracts in the longitudinal direction, when the feeding of the strap 63 from the reel 62 is stopped, the emergency stop lever 52 is moved from the release position while the spring portion 631 is extended. Displace to the stop position. Thereby, damage to the safety block 6 due to the stop of the car 1 can be suppressed.

  Further, since the reel 62 is supported by the car guide rail 2, an operator on the car 1 can easily install the safety block 6.

  In the first embodiment, replacement of the governor 41 has been described as an example of replacement of the governor device 4. However, for example, replacement of the governor rope 43 or the governor tensioner 42 is performed. It may be.

  Moreover, in the said Embodiment 1, although the winding cylinder type elevator was demonstrated to the example as an elevator, for example, a sill type elevator may be sufficient.

  1 car, 2 car guide rails, 3 car lifting device, 4 speed governor device, 5 emergency stop device, 6 safety block (retractor-type crash prevention device), 31 drive unit, 32 main rope, 33 suspension car, 41 speed control Machine, 42 governor tension vehicle, 43 governor rope, 44 governor support section, 45 governor tension vehicle support section, 51 emergency stop main body, 52 emergency stop lever, 53 pull-up bar, 61 mounting plate , 62 reel, 63 strap, 100 hoistway, 631 spring part.

Claims (3)

A governor device having a governor rope connected to the car and circulating and moving in conjunction with the raising and lowering of the car, and a governor rope rotatably provided on the car. An elevator repair method for replacing the speed governor device in an elevator having an emergency stop device connected to the elevator and having an emergency stop device for emergency stopping the car by hitting a guide rail for the car,
A governor rope separating step for separating the emergency stop lever and the governor rope;
A retractor type fall prevention device installation step of installing a retractor type fall prevention device having a reel and a strap wound around the reel in the hoistway, and connecting the strap to the emergency stop lever; and
A governor device replacement step of replacing the governor device after the governor rope disconnecting step and the retractor-type crash prevention instrument installation step ; and
In the retractor-type crash prevention device installation step, when the car is lowered so that the rotation speed of the reel is less than a preset speed, the position of the emergency stop lever becomes the release position, and the rotation of the reel When the car is lowered so that the speed is equal to or higher than a preset speed, the strap is connected to the emergency stop lever so that the position of the emergency stop lever is displaced from the release position to the stop position. repair method of the elevator, characterized in that that.   The elevator repair method according to claim 1, wherein the strap includes a spring portion that expands and contracts in a longitudinal direction.   3. The elevator repair method according to claim 1, wherein in the retractor-type crash prevention device installation step, the reel is supported by the car guide rail. 4.

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