JP2017186134A - Speed governor of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the adjustment work of a switch for detecting a speed of an elevator.SOLUTION: An elevator speed governor 400 comprises: a shaft 433 which rotates in conjunction with the rotation of a governor sheave 410; a weight part 472 which revolves with the shaft 433 as a center in conjunction with the rotation of the shaft 433; a movable member 440 which moves to a shaft direction in conjunction with the movement of the weight part 472 to the shaft direction by the revolution of the weight part 472; and a control device 800 for determining that a car has reached to a prescribed speed when the movable member 440 moves up to a prescribed position.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an elevator safety device.

  The elevator includes an emergency stop mechanism including a speed governor as one of safety devices. The emergency stop mechanism is to restrain the governor rope and automatically stop the car automatically when the car or the like suddenly descends above the rated speed due to some trouble or the like.

  In Patent Document 1, an operation element is provided in the speed governor. Specifically, when the traveling speed of the elevator exceeds a preset specified value, the operating element moves by the centrifugal force of the sheave and collides with the lever. As a result, the switch is turned on. On the other hand, there is a governor using a flyweight.

  A governor using a flyweight has a structure as shown in FIG. Specifically, when the governor sheave 10 rotates about the horizontal axis, the flyweight 20 rotates about the vertical axis. As a result, the flyweight 20 moves upward by centrifugal force. As a result, the sleeve 30 moves upward.

  Then, the cam 40 rotates about the horizontal axis 41 in conjunction with the movement of the sleeve 30 upward. Then, when the cam 40 rotates by a certain angle, the switch 50 is activated. In other words, the cam 40 rotates by a certain angle in conjunction with the elevator car reaching a certain speed. The switch 50 is actuated by the rotation of the cam 40.

JP 2011-63436 A

  However, when the detection speed of the car is set, the fixing angle of the cam 40 is adjusted. The adjusting method is to adjust by loosening the nut 42 fixing the cam 40.

  For this reason, there is a problem that even if the fixing angle of the cam 40 is slightly shifted, the detection speed of the car is greatly changed, and it is difficult to adjust the fixing angle of the cam 40.

  The main object of the present invention is to facilitate the adjustment work of the switch for detecting the speed of the elevator.

  A speed governor for an elevator according to the present invention is a speed governor that detects the speed of an elevator based on the rotation of a governor sheave on which a governor rope that travels as a car is raised and lowered, and is linked to the rotation of the governor sheave. In conjunction with the rotation of the shaft, the weight part revolving around the shaft as a rotation axis, the weight part revolving in the shaft direction by the revolution of the weight part, A movable member that moves in a shaft direction; and a control device that determines that the car has reached a predetermined speed when the movable member moves to a predetermined position.

  In such a case, it is not necessary to change the linear motion (up and down motion of the sleeve 30) to the rotational motion (rotation of the cam 40), and therefore it is not necessary to adjust the fixed angle of the cam 40. That is, since the linear motion is directly used for detecting the speed of the elevator, the adjustment work of the switch is easy.

  In other words, when the movable member moves to a predetermined position, the control device determines that the car has reached a predetermined speed. The switch adjustment work for the controller to make the determination is facilitated.

  A speed governor for an elevator according to the present invention is a speed governor that detects the speed of an elevator based on the rotation of a governor sheave on which a governor rope that travels as the car moves up and down, and is used to rotate the governor sheave. A shaft that rotates in conjunction with the shaft, a weight portion that revolves around the shaft as a rotation axis, and a movement of the weight portion in the shaft direction due to the revolution of the weight portion. A movable member that moves in the shaft direction, and a switch unit that can contact the movable member, and the switch unit includes an adjustment mechanism that can adjust a contact position with the movable member. .

  If it is such, the contact position of the said movable member and the said switch part can be adjusted easily. That is, the adjustment work of the switch becomes easy.

  The switch unit includes a contact member that contacts the movable member, a detection switch that detects that a rotation speed of the governor sheave has reached a predetermined speed by contacting the contact member and the movable member, and the contact It is preferable to include a moving member to which the member is directly or indirectly connected and an adjusting member for adjusting the position of the moving member.

  If it is such, a contact position can be adjusted easily. In other words, the adjustment work of the switch becomes easy.

  The adjusting member is preferably one that moves the moving member in the direction of the rotation axis by rotating.

  If it is such, it can adjust easily even if the position adjustment of the said moving member is slight.

  The speed detection method using the governor for an elevator according to the present invention is a speed detection using a governor that detects the speed of an elevator based on the rotation of a governor sheave to which a governor rope that travels as the car is raised and lowered. The speed governor includes a shaft that rotates in conjunction with rotation of the governor sheave, a weight portion that revolves around the shaft and rotates around the shaft, and a revolution of the weight portion. In conjunction with the movement of the weight portion in the shaft direction, a movable member moving in the shaft direction and a contact member in contact with the movable member are provided, and the shaft is interlocked with the rotation of the governor sheave. A rotation process that rotates, a revolution process in which a weight part revolves around the shaft as a rotation axis by the rotation process, and the weight part moves in the shaft direction by the revolution process. The movable member moving step in which the movable member moves in the shaft direction in conjunction with the movement, the adjusting step in which the position of the contact member in contact with the movable member is adjusted, and the movable member and the contact member And a detecting step in which a predetermined rotation speed of the governor sheave is detected by contact.

With such a method, the contact position between the movable member and the contact member can be easily adjusted. That is, the adjustment work of the switch becomes easy.

  If it is a governor which concerns on this invention, the adjustment operation | work of the switch for detecting the speed of an elevator can be made easy.

The perspective view of the elevator which concerns on this embodiment. The side view schematic diagram of the elevator which concerns on this embodiment. The side view of the governor for elevators which concerns on this embodiment. The flowchart of the speed detection method using the governor for elevators which concerns on this embodiment. The side view partial enlarged view of the conventional governor for elevators.

Hereinafter, embodiments of a governor for elevators (hereinafter referred to as “regulator”) according to the present invention will be described with reference to the drawings.

(elevator)
As shown in FIGS. 1 and 2, in the elevator 100, a hoisting machine 200 is installed in the machine room at the top of the hoistway. A car 230 is connected to one end of the main rope 220 wound around the drive sheave 210 of the hoist 200, and a counterweight 240 is connected to the other end.

  When the drive sheave 210 is rotationally driven by a motor (not shown) of the hoisting machine 200, the main rope 220 travels along with this, and the car 230 suspended by the main rope 220 is guided to the guide rail 300. To go up and down in the hoistway.

  The elevator 100 is provided with a speed governor 400 that mechanically detects that the ascending / descending speed of the car 230 exceeds a predetermined speed. An endless governor rope 600 is wound between the governor sheave 410 of the governor 400 and the tension sheave 500 positioned below the governor sheave 410.

  A weight 700 is suspended from the tension sheave 500, and the governor rope 600 is stretched in a tensioned state in parallel with the main rope 220 by its own weight. A part of the governor rope 600 is fixed to an emergency stop lever 250 that operates an emergency stop device (not shown) provided on the car 230 side.

  For this reason, the governor rope 600 travels at the same speed as the car 230 in synchronization with the raising and lowering of the car 230. At this time, the speed governor 400 detects the rotational speed of the governor sheave 410 that is rotated at the same speed as the traveling speed of the governor rope 600, thereby detecting an overspeed of the car 230 being lifted and lowered.

(Governor 400)
The governor 400 is provided with a detection mechanism that detects the rotational speed of the governor sheave 410 that rotates at the same speed as the traveling speed of the governor rope 600 (the lifting speed of the car 230). The detection mechanism of the governor 400 will be described later.

  When the raising / lowering speed of the car 230 reaches a first speed exceeding the rated speed (predetermined speed) (within Japanese law, within 130% of the rated speed), the motor (the motor constituting the hoisting machine 200 of the main rope 220) (Not shown) is braked.

  However, when the main rope 220 is broken, the lowering of the car 230 does not stop even if the motor (not shown) is stopped. Therefore, when the descending speed of the car 230 (the rotational speed of the governor sheave 410) exceeds the second speed (140% of the rated speed in Japanese law) that is larger than the first speed, the trip lever (not shown) ) Is released, and the movable grip swings downward (lowers) due to its own weight.

  As a result, the distance between the movable grip and the fixed grip is gradually narrowed, and after the movable grip comes into contact with the governor rope 600 that travels downward between them, the friction force generated between the movable grip and the governor rope 600 is also added. , Descend further.

  Then, the movable grip descends to a position facing the fixed grip, the governor rope 600 is gripped by the movable grip and the fixed grip, and the governor rope 600 is stopped.

  At that time, the compression coil spring is further compressed, and the governor rope 600 is strongly pressed by the restoring force, so that the governor rope 600 is securely fixed.

  When the traveling of the governor rope 600 stops even though the car 230 continues to descend, the emergency stop lever 250 fixed to the governor rope 600 is pulled up by the governor rope 600 and is relatively lifted. As a result, an emergency stop device (not shown) is activated and the car 230 is stopped.

(Detection mechanism of governor 400)
As shown in FIG. 3, in the present embodiment, the speed governor 400 is a so-called flyball type speed governor 400. The speed governor 400 includes a column 430 erected on the upper surface of the base 420, a governor sheave 410 rotatably attached to the column 430, a movable member 440 that is movable in conjunction with the rotational speed of the governor sheave 410, and a movable member A spring 450 provided above 440; an attachment member 460 provided above the spring 450; and a pendulum portion 470 attached to the attachment member 460.

  A governor sheave 410 is rotatably attached to the column 430 via a horizontal shaft 431. The base 420 has an opening (not shown) for securing a traveling path for the governor rope 600.

  The governor sheave 410 is rotatably attached to the support column 430, and a governor rope 600 is hung on it.

  A first bevel gear 434 that is attached to the governor sheave 410 and rotates integrally with the governor sheave 410 is rotatably attached to the horizontal shaft 431.

  A vertical shaft 433 that is a shaft is rotatably provided on the support column 430. A second bevel gear 432 is attached to the vertical shaft 433 so as to mesh with the first bevel gear 434 and rotate integrally with the vertical shaft 433.

  When the second bevel gear 432 rotates, the vertical shaft 433 rotates around the axial direction. Therefore, when the first bevel gear 434 rotates around the horizontal axis 431, the vertical axis 433 rotates in conjunction with it.

  Above the second bevel gear 432, a movable member 440 that is movable in the vertical direction along the vertical axis 433 is disposed. A slider 441 is disposed above the movable member 440. Above the slider 441, a spring 450, which is an elastic member, is disposed on the vertical shaft 433. A receiving metal 451 is disposed above the spring 450.

  The movable member 440 has a disk shape in this embodiment, and the corner portion 442 on the upper surface of the movable member 440 is inclined toward the outside in the radial direction. A through hole 443 is provided in the central portion of the movable member 440 in plan view. A vertical shaft 433 is inserted into the through hole 443. The movable member 440 is provided so as to be movable along the axial direction of the vertical shaft 433.

  When the movable member 440 is raised, the movable member 440 comes into contact with the contact member 487 of the switch unit 480. As a result, the switch is turned on. A specific configuration of the switch unit 480 will be described later.

  Note that the shape of the movable member 440 does not have to be a disk shape, and may be any structure as long as it has a through hole 443 into which the vertical shaft 433 can be inserted in the center portion in plan view.

  The slider 441 has a ring shape in the present embodiment, and a vertical shaft 433 is inserted in the central portion in plan view. The slider 441 is disposed above the movable member 440 and is connected to the movable member 440. Therefore, when the slider 441 moves along the axial direction of the vertical shaft 433, the movable member 440 moves along the axial direction of the vertical shaft 433 in conjunction with the slider 441. In addition, a connecting member 473 described later is connected to the slider 441.

  In the vertical shaft 433, an attachment member 460 is provided on the upper portion of the receiving metal 451. A pendulum part 470 is swingably attached to the attachment member 460. The pendulum part 470 includes a bar 471 and a weight part (flyweight) 472. In this embodiment, the pendulum part 470 is provided at two places on the attachment member 460, but may be provided at two or more places.

  The attachment member 460 is fixed to the vertical shaft 433 so as to rotate integrally with the vertical shaft 433, and each of the pendulum portions 470 is configured such that one end portion of the bar 471 is swingable to the attachment member 460 via the pin 461. It is attached.

  The bar 471 and the slider 441 are connected by a connecting member 473. Therefore, the slider 441 moves upward along the vertical axis 433 in conjunction with the upward movement of the weight part 472 of the pendulum part 470 by the centrifugal force of rotation about the vertical axis 433.

  The spring 450 biases the slider 441 downward by the elastic force. Therefore, when the weight 472 of the pendulum part 470 moves the slider 441 upward by the centrifugal force of rotation about the vertical axis 433 as a force greater than the biasing force of the spring 450, the slider 441 moves to the vertical axis 433. Move upward along.

  The movable member 440 moves upward along the vertical axis 433 in conjunction with the slider 441 moving upward along the vertical axis 433. As a result, the movable member 440 comes into contact with a contact member 487 described later, and a switch for detecting a predetermined rotational speed of the governor sheave 410 is turned on.

  With such a configuration, the governor 400 detects the rotational speed of the predetermined governor sheave 410. In other words, the governor 400 detects the traveling speed of the governor rope 600. That is, the governor 400 detects the speed of the car 230.

(Adjustment mechanism of switch unit 480 and switch unit 480)
The position of the switch unit 480 is adjusted by a fixing bracket 481 fixed to the base 420, a guide member 482a attached to the fixing bracket 481 with a nut 483a, an adjusting member 482b attached to the fixing bracket 481 with a nut 483b, and an adjusting member 482b. The movable member 484, the fixed member 485 fixed to the movable member 484, the switch member 486 connected to the fixed member 485, the contact member 487 provided on the switch member 486, and the detection switch 488 are configured.

  The fixed bracket 481 has an upper part 481 a substantially parallel to the base 420. A guide member 482a and an adjustment member 482b are connected to the upper portion 481a by nuts 483a and 483b.

  The guide member 482a is fixed to the fixed bracket 481 with a nut 483a. The guide member 482a may be welded to the fixed bracket 481. The moving member 484 moves along the axial direction of the guide member 482a.

  A male screw is engraved on the adjustment member 482b. The moving member 484 is provided with a female screw 484a. Therefore, when the adjustment member 482b rotates (spins), the moving member 484 moves in the axial direction.

  When the moving member 484 is disposed at a predetermined position, the adjustment member 482b is fixed by the nut 483b. As a result, the moving member 484 is fixed at a predetermined position.

  As described above, the moving member 484 moves in the axial direction along the guide member 482a. The position of the moving member 484 is determined by the adjusting member 482b. Specifically, as described above, when the adjusting member 482b rotates (spins), the moving member 484 moves in the axial direction along the guide member 482a and the adjusting member 482b. When the adjustment member 482b is fixed by the nut 483b, the moving member 482 is fixed at the position.

  A fixed member 485 is attached to the moving member 484. A base end 486a of a switch member 486 is fixed to the fixing member 485, and a tip end 486b is movably attached.

  A contact member 487 is provided at the tip 486 b of the switch member 486. The contact member 487 has a roll portion, and the movable member 440 can contact the roll portion.

  The detection switch 488 is in contact with the switch member 486. When the movable member 440 comes into contact with the contact member 487 of the switch member 486, the tip 486b of the switch member 486 is movable. As a result, the switch member 486 is separated from the detection switch 488. Then, when the switch member 486 is separated from the detection switch 488, a detection signal is sent to the control device 800.

  The control device 800 to which the detection signal is transmitted controls the speed of the car 230. Specifically, the control device 800 controls a motor (not shown) of the hoisting machine 200. In addition, the control device 800 applies the brake 211 of the hoisting machine 200. Then, the control device 800 reduces or stops the speed of the car 230.

  Note that the position of the contact member 487 (the vertical position in the present embodiment) is determined by adjusting the position of the moving member 484 (the vertical position in the present embodiment) by the adjustment member 482b. In other words, the position where the contact member 487 and the movable member 440 are in contact (the position in the vertical direction in this embodiment) is determined. As a result, the detection speed of the car 230 is adjusted.

  In the present embodiment, the movable member 440 and the contact member 487 are in contact with each other when the movable member 440 is raised, but the movable member 440 and the contact member 487 are brought into contact with each other when the movable member 440 is lowered. It may be.

  In this embodiment, the movable member 440 comes into contact with the contact member 487 to detect the rise of the movable member 440. However, the position of the movable member 440 is detected by a sensor such as a passage sensor, and the movable member 440 is moved. An increase or decrease may be detected.

(Cage 230 speed detection method)
As shown in FIG. 4, the contact member 487 is connected to the switch member 486, the switch member 486 is connected to the fixed member 485, and the fixed member 485 is connected to the moving member 484. Therefore, the position of the contact member 487 is adjusted by the position of the moving member 484.

  When the adjusting member 482b rotates, the moving member 484 moves in the axial direction of the adjusting member 482b. Accordingly, the position of the moving member 482 is adjusted by the rotation of the adjusting member 482b, and the position of the contact member 487 is adjusted in conjunction therewith. That is, the position of the contact member 487 that contacts the movable member 440 is adjusted (adjustment step, step S11).

  In conjunction with the rotation of the governor sheave 410, the vertical shaft 433, which is a shaft, rotates (rotation process, step S12). Specifically, when the governor sheave 410 rotates, the vertical shaft 433 rotates through the bevel gears (the first bevel gear 434 and the second bevel gear 432).

  Next, the pendulum part 470 rotates about the vertical axis 433 that is a shaft as a rotation axis. That is, the weight part 472 of the pendulum part 470 revolves (revolution process, step S13). Specifically, the weight portion 472 is attached to the vertical shaft 433 and the attachment member 460 via the bar 471. When the vertical shaft 433 rotates, the pendulum part 470 rotates in conjunction with the vertical shaft 433 as an axis.

  The weight portion 472 of the pendulum portion 470 revolves around the vertical shaft 433 as a rotation axis, so that the weight portion 472 is raised in the direction of the vertical shaft 433 by centrifugal force. The movable member 440 moves up (moves) in the direction of the vertical axis 433 in conjunction with the weight portion 472 moving up (moving) in the direction of the vertical axis 433 (movable member moving step, step S14).

  When the movable member 440 and the contact member 487 come into contact with each other, a predetermined rotation speed of the governor sheave 410 is detected (detection step, step S15). That is, the predetermined speed of the car 230 is detected. The position of the contact member 487 can be adjusted at any stage. Even after the position of the contact member 487 is adjusted, it can be adjusted again.

  Such a method for adjusting the position of the contact member 487 can be easily performed. Further, the fine adjustment of the position of the contact member 487 can be easily performed. In the present embodiment, the predetermined rotation speed of the governor sheave 410 is detected by contact between the movable member 440 and the contact member 487, but the passage of movement of the movable member 440 is detected using a passage sensor or the like. May be.

  The speed governor 400 according to the present invention can also be used as a terminal floor forced reduction device.

  The present invention can be implemented in a mode in which various improvements, modifications, or variations are added without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Elevator 200 ... Hoisting machine 230 ... Car 300 ... Guide rail 400 ... Speed governor 410 ... Governor sheave 431 ... Horizontal axis 433 ... Vertical axis (shaft)
440 ... movable member 450 ... spring (elastic member)
470 ... Pendulum part 472 ... Weight part 480 ... Switch part 482a ... Guide member 482b ... Adjusting member 484 ... Moving member 484a ... Female screw 486 ... Switch member 487 ... Contact member 488 ... Detection switch 500 ... Tension sheave 600 ... Governor rope 700 ... Weight 800 ... Control device

Claims (5)

A governor that detects the speed of an elevator based on the rotation of a governor sheave on which a governor rope that travels as the car moves up and down,
A shaft that rotates in conjunction with the rotation of the governor sheave,
In conjunction with the rotation of the shaft, a weight portion that revolves around the shaft as a rotation axis;
A movable member that moves in the shaft direction in conjunction with the movement of the weight portion in the shaft direction by the revolution of the weight portion;
A controller that determines that the car has reached a predetermined speed when the movable member has moved to a predetermined position;
The elevator governor. A governor that detects the speed of an elevator based on the rotation of a governor sheave on which a governor rope that travels as the car moves up and down,
A shaft that rotates in conjunction with the rotation of the governor sheave,
In conjunction with the rotation of the shaft, a weight portion that revolves around the shaft as a rotation axis;
A movable member that moves in the shaft direction in conjunction with the movement of the weight portion in the shaft direction by the revolution of the weight portion;
A switch part capable of contacting the movable member,
The switch unit is an elevator governor including an adjustment mechanism capable of adjusting a contact position with the movable member. The switch part is
A contact member in contact with the movable member;
A detection switch for detecting that the rotation speed of the governor sheave has reached a predetermined speed by contacting the contact member and the movable member;
A moving member to which the contact member is connected directly or indirectly;
The governor for elevators according to claim 2 provided with an adjustment member which adjusts a position of said movement member. The elevator governor according to claim 3, wherein the adjustment member rotates to move the moving member in a rotation axis direction. A speed detection method using a speed governor that detects the speed of an elevator based on the rotation of a governor sheave on which a governor rope that travels as the car moves up and down,
The governor includes a shaft that rotates in conjunction with the rotation of the governor sheave,
In conjunction with the rotation of the shaft, a weight portion that revolves around the shaft as a rotation axis;
A movable member that moves in the shaft direction in conjunction with the movement of the weight portion in the shaft direction by the revolution of the weight portion;
A contact member in contact with the movable member,
A rotation process in which the shaft rotates in conjunction with the rotation of the governor sheave;
A revolving step in which the weight portion revolves around the shaft as a rotation axis by the rotation step,
A movable member moving step in which the movable member moves in the shaft direction in conjunction with the weight portion moving in the shaft direction by the revolving step,
An adjusting step in which the position of the contact member in contact with the movable member is adjusted;
A speed detecting method using a speed governor, comprising: a detecting step in which a predetermined rotation speed of the governor sheave is detected by contacting the movable member and the contact member.

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