Elevator device

Abstract

This elevator device is provided with a speed governor that is provided with: a pulley; a flying pendulum which is displaced according to the rotation speed of the pulley; a ratchet wheel for operating the emergency stop device; a claw that is displaceable together with the pendulum and engages with the ratchet; and a biasing member that biases the claw such that the claw does not disengage from the ratchet when the claw engages with the ratchet. It is preferable that the biasing member does not bias the claw before the claw engages with the ratchet wheel and the emergency stop device operates, and that the biasing member biases the claw such that the claw does not disengage from the ratchet wheel when the claw engages with the ratchet wheel and the emergency stop device operates.

Description

Technical Field

[0001] This disclosure relates to elevator installations. Background Technology

[0002] Patent Document 1 discloses an elevator speed governor. In this elevator speed governor, a check rod is provided on the base, which can be moved between a standby position and a check position in which the oscillator is rotated to engage the latch with the ratchet. The check rod can be remotely moved from the landing side by means of a check wire.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 4437574 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the existing elevator mechanism described above, the pawl is forced away from the ratchet. Therefore, after the emergency stop device activates, the pawl automatically returns to its normal operating state as the car ascends.

[0008] Emergency stop tests are sometimes required during certification tests, pre-completion inspections, and periodic inspections. During an emergency stop test, if the emergency stop device operates, the pawl may disengage from the ratchet due to the counterweight's swinging motion caused by inertia, leading to the speed governor resetting. When the speed governor resets, there is a risk that the car may fall freely again to an abnormal speed.

[0009] This disclosure was made to solve the aforementioned problems. The object of this disclosure is to provide an elevator device that can prevent the speed governor from resetting due to the swing of the emergency stop device during operation.

[0010] Methods for solving problems

[0011] The elevator device disclosed herein includes a speed governor, wherein the speed governor comprises: a pulley; a pendulum that moves according to the rotational speed of the pulley; a ratchet for activating an emergency stop device; a pawl that can move together with the pendulum to engage with the ratchet; and a force-applying component that applies force to the pawl when it engages with the ratchet so that the pawl does not disengage from the ratchet.

[0012] Invention Effects

[0013] According to this disclosure, an elevator device can be provided that can prevent the speed governor from resetting due to the swing of the emergency stop device during operation. Attached Figure Description

[0014] Figure 1This is a diagram showing the speed limiter included in the elevator device of Embodiment 1.

[0015] Figure 2 This is a diagram showing the initial positions of the pendulum and claw.

[0016] Figure 3 This indicates the speed ratio of the car. Figure 2 The diagram showing the states after the number of states has increased.

[0017] Figure 4 This diagram shows the instantaneous state of the emergency stop device when the pawl engages with the ratchet, the rope catcher catches the speed limiter rope, and the device is activated.

[0018] Figure 5 This diagram shows the state when the car is stopped by the emergency stop device and the rotation of the pulleys stops.

[0019] Figure 6 This diagram shows the state of the car when it rises slightly due to the swing after the emergency stop device has been activated.

[0020] Figure 7 This is a diagram showing the state of the car as it descends. Detailed Implementation

[0021] The embodiments will now be described with reference to the accompanying drawings. In the drawings, common or corresponding elements are labeled with the same reference numerals, and descriptions are simplified or omitted. Furthermore, when angles are mentioned in this disclosure, if there are a primary angle and a secondary angle that sum to 360 degrees, the angle of the secondary angle generally refers to that angle; if there are an acute angle and an obtuse angle that sum to 180 degrees, the angle of the acute angle generally refers to that angle. Moreover, the structures shown in the embodiments below illustrate one example of the technical concept of this disclosure, and can be combined with other known technologies, as well as with multiple technical concepts described in this disclosure. Furthermore, without departing from the spirit of this disclosure, parts of the structure can be omitted or modified.

[0022] Implementation method 1.

[0023] Figure 1 This is a diagram showing the speed limiter included in the elevator device of Embodiment 1. Figure 1 The speed limiter 1 shown is a device used to forcibly stop the movement of the elevator car (not shown) when the moving speed of the elevator car exceeds a certain speed.

[0024] The speed governor 1 includes a pulley 2. A speed governor rope (not shown) is wound around the pulley 2. The speed governor rope is connected to the car. The speed governor rope moves with the car, causing the pulley 2 to rotate. When the car rises, the speed governor rope... Figure 1 In the middle, pulley 2 rotates clockwise. When the car descends, in Figure 1In the middle, pulley 2 rotates counterclockwise.

[0025] A pendulum 3 is mounted on pulley 2. The pendulum 3 shifts according to the rotational speed of pulley 2. The pendulum 3 is capable of rotating and moving relative to pulley 2 about a first rotation axis 4. The pendulum 3 is shifted by the centrifugal force of the rotation of pulley 2. A pair of pendulums 3 are arranged symmetrically about the center of pulley 2. Figure 1 The image shows only one of the pendulum swings 3.

[0026] The speed limiter 1 includes a ratchet 5, which is used to activate the emergency stop device. The ratchet 5 is a ratchet arranged concentrically with the pulley 2.

[0027] The speed limiter 1 includes a pawl 6. The pawl 6 can move together with the pendulum 3 to engage with the ratchet 5. The pawl 6 can rotate relative to the pendulum 3 about a first rotation axis 4. When the pendulum 3 is displaced by centrifugal force, the pawl 6 moves towards the working direction of the ratchet 5. Figure 1 In the example, the working direction is counterclockwise with the first rotation axis 4 as the center.

[0028] When the pendulum 3 rotates to a certain angle, the pawl 6 engages with the ratchet 5. When the pawl 6 engages with the ratchet 5, the ratchet 5 rotates, and the rope catcher (not shown) catches the speed limiter rope, thereby activating the car's emergency stop device (not shown) and forcibly stopping the car.

[0029] The pawl 6 is forced away from the ratchet 5 by a spring (not shown), i.e., in the return direction. Figure 1 In the example, the reset direction is clockwise centered on the first rotation axis 4. If the force-applying component 7 (described later) is not present, after the emergency stop device is activated, when the car rises, the pawl 6 disengages from the ratchet 5, and due to the force of the spring, the pawl 6 automatically returns to its normal driving position.

[0030] The emergency stop device is originally designed to operate in the event of a break in the main rope suspending the car and counterweight. However, during qualification tests, pre-completion inspections, and periodic inspections, operational tests of the emergency stop device are sometimes required. In such cases, the emergency stop device is activated while the main rope remains intact during suspension. When the emergency stop device activates and brings the car to an emergency stop, the counterweight lurches due to inertia. Once the speed reaches zero, it begins to fall freely with the amount of lurching it had made. If the traction mechanism brakes are not engaged, the car will rise slightly due to the energy of the falling counterweight. In this disclosure, this phenomenon is referred to as "swingback." When the speed governor 1 resets due to the car's rise during this swingback, there is a problem that the car may fall freely back to an abnormal speed after the emergency stop device has activated.

[0031] Normally, the main rope is broken when the emergency stop device is in operation, so it will not be in the state described above. However, during the operation test of the emergency stop device in the suspended state with the main rope intact, there is a problem that the speed governor 1 will automatically reset due to the swing. In view of this, in the elevator device of this embodiment, a force-applying component 7 is provided on the pendulum 3. When the pawl 6 engages with the ratchet 5, the force-applying component 7 applies force to the pawl 6 so that the pawl 6 will not disengage from the ratchet 5. The force-applying component 7 in this embodiment is a leaf spring. The force-applying component 7 disclosed herein is not limited to a leaf spring; for example, a coil spring may also be used.

[0032] Figure 2 This is a diagram showing the initial positions of the pendulum 3 and the claw 6. Figure 2 This refers to the state when the car's speed is below the rated speed. Figure 2 In this state, the force-applying component 7 does not apply force to the claw 6. That is, the claw 6 is not subjected to force from the force-applying component 7 in either the working direction or the reset direction. Figure 2 In the example, the bolt 9 located at the rear end of the claw 6 abuts against the recess 8 formed in the pendulum 3.

[0033] Figure 3 This indicates the speed ratio of the car. Figure 2 The diagram showing the states after the number of states has increased. Figure 3 The state indicates the condition of the car when it descends at an abnormal speed higher than its rated speed. Figure 3 In this state, the pendulum 3 and the claw 6 rotate slowly in the working direction around the first rotation axis 4. The relative positional relationship between the claw 6 and the force-applying component 7 is as follows: Figure 2 Same. In this embodiment, the force-applying component 7 does not apply force to the pawl 6 before the pawl 6 engages with the ratchet 5, thus preventing the force-applying component 7 from affecting the original function of the speed limiter 1.

[0034] Figure 4 This diagram shows the instantaneous state at which the pawl 6 engages with the ratchet 5, the rope catcher catches the speed limiter rope, and the emergency stop device operates. In this state, the relative positional relationship between the pawl 6 and the force-applying component 7 is... Figure 2 same.

[0035] Figure 5This diagram illustrates the state when the car is stopped by the emergency stop device and the rotation of pulley 2 has ceased. When the rotation of pulley 2 stops, the pendulum 3 returns to its original position by the force of the spring (not shown), but the pawl 6, due to its engagement with ratchet 5, does not return to its original position and maintains its rotation angle. As a result, the force-applying component 7 enters under the bolt 9 of the pawl 6, and the force-applying component 7 applies force to the pawl 6 in the working direction. In this embodiment, the pawl 6 can rotate relative to the pendulum 3 about the first rotation axis 4, thus maintaining the engagement of the pawl 6 with the ratchet 5 when the pendulum 3 rotates in the reset direction to return to its original position.

[0036] Figure 6 This diagram shows the state when the car rises slightly due to the swing after the emergency stop device has been activated. In this state, the engagement between the pawl 6 and the ratchet 5 is about to disengage, but because the force-applying component 7 contacts the bolt 9 and applies force to the pawl 6 in the working direction, the pawl 6 remains engaged with the ratchet 5. Therefore, the speed governor 1 does not reset and the emergency stop device remains activated. Furthermore, after the pawl 6 engages with the ratchet 5, even if the car moves in the upward direction, the pawl 6 will climb onto the teeth of the ratchet 5, thus not hindering the operation of the pawl 6 and the ratchet 5.

[0037] Figure 7 This is a diagram showing the state of the car as it descends. Figure 6 After reaching this state, when the car descends, the pawl 6 is held in the engaged position with the ratchet 5 by the force-applying component 7. Therefore, regardless of speed, the pawl 6 is engaged with the ratchet 5. Thus, even as the car descends, the speed limiter 1 will not reset, the rope catcher catches the speed limiter rope, and the emergency stop device activates instantaneously. This maintains the emergency stop device in operation. The relative positional relationship between the force-applying component 7 and the pawl 6 is... Figure 5 same.

[0038] The force-applying component 7 can be removed from the pendulum 3. The force-applying component 7 is an auxiliary device installed only during testing of the emergency stop device. Under normal circumstances, the force-applying component 7 is removed. As a result, the speed limiter 1 can be automatically reset under normal circumstances, and can be made non-automatically reset during inspection.

[0039] As described above, in this embodiment, before the emergency stop device operates by engaging the pawl 6 with the ratchet 5, the force-applying component 7 does not apply force to the pawl 6. When the emergency stop device operates by engaging the pawl 6 with the ratchet 5, the force-applying component 7 applies force to the pawl 6 in the working direction so that the pawl 6 does not disengage from the ratchet 5. Thus, when the car descends, the emergency stop device does not operate immediately, but can perform normal operation (traveling at rated speed) before an initial operation.

[0040] Label Explanation

[0041] 1: Speed ​​limiter; 2: Pulley; 3: Swing; 4: First rotating shaft; 5: Ratchet; 6: Claw; 7: Force-applying component; 8: Recess; 9: Bolt.

Claims

1. An elevator device provided with a speed governor, wherein the speed governor is provided with: a pulley; a flyweight that shifts in accordance with a rotational speed of the pulley; a ratchet that functions to activate an emergency stop device; a pawl that is able to shift together with the flyweight to engage with the ratchet; and a force applying member that applies force to the pawl to cause the pawl not to disengage from the ratchet when the pawl engages with the ratchet.

2. The elevator device according to claim 1, wherein the force applying member does not apply force to the pawl before the pawl engages with the ratchet to activate the emergency stop device, the force applying member applies force to the pawl to cause the pawl not to disengage from the ratchet when the pawl engages with the ratchet to activate the emergency stop device.

3. The elevator device according to claim 1 or 2, wherein the pawl is able to move in rotation relative to the flyweight.

4. The elevator device according to any one of claims 1 to 3, wherein the flyweight is able to move in rotation relative to the pulley about a first rotation axis, the pawl is able to move in rotation relative to the flyweight about the first rotation axis.

5. The elevator device according to any one of claims 1 to 4, wherein the force applying member is able to be detached.

6. The elevator device according to any one of claims 1 to 5, wherein after the pawl engages with the ratchet, the pawl climbs up the teeth of the ratchet without impeding the action thereof even if the car moves in an upward direction.

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