JP4303295B2 - Elevator safety device - Google Patents

Description

  The present invention relates to an elevator safety device that makes an emergency stop when a car overspeed is detected, and more particularly, to an elevator safety device in which a governor device for detecting a car overspeed is arranged in the car. About.

  For example, a rope type elevator generally has a car, a main rope having the car connected to one end and a weight connected to the other end, and a hoisting machine (driving device) around which the main rope is wound and driven to rotate. ). In addition, guide rails are installed on one side and the opposite side of the car in the hoistway, and the guide rollers are provided on the car to engage the guide rails, respectively, to guide the car up and down. . Then, the car is raised and lowered by hoisting and lowering the main rope by the rotational drive of the hoisting machine. As such an elevator safety device, for example, there is known a device that makes an emergency stop of a car when the speed of the car exceeds a preset speed for a certain reason (hereinafter referred to as overspeed). This safety device is composed of a governor device (governor) for detecting an overspeed of the car and an emergency stop means for making an emergency stop of the car when the overspeed of the car is detected by the governor device. .

  Conventionally, a governor device is known that is disposed in a machine room or a hoistway, and is of a rope type that detects an overspeed of a car by a governor roller that rotates via a governor rope. However, the recent demands for space saving and cost reduction of elevators, further ensuring safety (in detail, in the rope type governor device, if the governor rope becomes long, the possibility of rope breakage due to its own weight, Because there is a possibility of the rope coming off due to an earthquake or the like, and it is necessary to be concerned about these possibilities), a low press type governor having a governor roller that is disposed on the car and rotates in contact with the guide rail An apparatus has been proposed (see, for example, Patent Document 1).

  A low press type governor device described in Patent Document 1 includes a roller guide frame attached to a car, a roller arm attached to the roller guide frame so as to be rotatable about a rotation axis of the roller arm, and the roller arm. The roller guide (governor roller) mounted rotatably around the roller shaft on the tip side of the roller, and is provided between the other end side of the roller arm and the roller guide frame, and the roller guide is pressed against the guide rail via the roller arm. And a roller pressing spring for applying a force. With such a structure, contact between the roller guide and the guide rail during traveling of the car is ensured, and lateral vibration during traveling is absorbed to suppress the influence on the car.

JP 11-349251 A (page 4)

However, there are the following problems in the above-described prior art.
That is, the low press type governor device includes a governor roller that is swingably attached to a car via a roller arm, and a roller pressing spring that applies a pressing force of the governor roller to the guide rail via the roller arm. ing. For example, when the car oscillates laterally (specifically, when the distance between the car and the guide rail fluctuates), the governor roller swings with respect to the car to absorb the vibration and the roller pressing spring is attached. The contact state between the governor roller and the guide rail is maintained by the force. However, at this time, the displacement of the roller pressing spring, that is, the urging force slightly fluctuates in accordance with the fluctuation of the distance between the carriage and the guide rail, so that the friction force between the governor roller and the guide rail may fluctuate. Therefore, even if the speed of the car is constant, the rotation speed of the governor roller fluctuates, the detection accuracy of the governor device decreases, and the emergency stop operation by the emergency stop means is delayed, or in the event of an emergency stop It may not work.

  The objective of this invention is providing the safety device of the elevator which can improve the detection accuracy of a governor apparatus and can improve the certainty of an emergency stop action | operation.

  (1) In order to achieve the above object, the present invention provides a first car and a second car which are disposed on the side of the car and on one side and the other side of the car, and guide the car in the up-and-down direction. A guide rail, a governor device disposed on the car and having a governor roller rotatable in contact with the first guide rail, and detecting an overspeed of the car; and the car with the governor device. An elevator safety device comprising emergency stop means for emergency stop of the car when an overspeed of the vehicle is detected, and a counter disposed on the car and capable of rotating in contact with the second guide rail A counter roller mechanism having a roller; a swing support mechanism for swingably supporting the governor device and the counter roller mechanism with respect to the car; the governor roller and the counter roller; Connected between, while applying a pressing force of the Gabanarora to said first guide rail, and a tension bar that applies a pressing force of the Gabanarora relative to the second guide rail.

  In the present invention, a governor device having a governor roller that can rotate in contact with the first guide rail and a counter roller mechanism having a counter roller that can rotate in contact with the second guide rail are disposed in the car. In addition, a swing support mechanism is provided for swingably supporting the governor device and the counter roller mechanism with respect to the car. A tension bar is provided between the governor roller and the counter roller and applies a pressing force of the governor roller to the first guide rail and also applies a pressing force of the counter roller to the second guide rail. Thus, for example, when the car vibrates laterally (specifically, when the distance between the car and the guide rail fluctuates), the governor device and the counter roller mechanism are swung with respect to the car by the rocking support mechanism. Can absorb vibration. The tension bar can maintain the contact state between the governor roller and the first guide rail and the contact state between the counter roller and the second guide rail. Furthermore, the tension bar can hold the pressing force of the governor roller against the first guide rail at a predetermined value corresponding to the dimension between the guide rails (in other words, the dimension between the axes of the governor roller and the counter roller). Therefore, the frictional force between the governor roller and the first guide rail can be stabilized, and the detection accuracy of the governor device can be increased. As a result, the certainty of the emergency stop operation by the emergency stop means can be improved.

  (2) In the above (1), preferably, the swing support mechanism supports the governor device and the counter roller mechanism so as to swing together with respect to the car.

  As a result, it is possible to enhance the interlocking movement of the governor roller and the counter roller, and to maintain a balance between the pressing force of the governor roller and the pressing force of the counter roller by the tension bar.

  (3) In the above (1), preferably, the emergency stop means is disposed in the car and operates via a link mechanism when the overspeed of the car is detected by the governor device. A braking device for holding the first and second guide rails is provided.

  (4) In the above (1), preferably, the emergency stop means has stop control means for stopping a drive device that drives the car to move up and down.

  According to the present invention, the detection accuracy of the governor device can be increased, and the certainty of the emergency stop operation can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing a schematic configuration of an elevator to which an embodiment of an elevator safety device of the present invention is applied. FIG. 2 is a partially enlarged side view showing a main part configuration of an embodiment of the elevator safety device of the present invention, and FIG. 3 is a partially enlarged side view showing a detailed structure of the governor device together with a peripheral part.

  1 to 3, the rope type elevator includes a car 1, a main rope 3 to which the car 1 is connected to one end side, and a weight 2 to the other end side. A hoisting machine 4 (drive device) that is wound and rotationally driven is provided. Guide rails 5A and 5B are installed on one side (right side in the figure) and the other side (left side in the figure) of the car 1 in the hoistway, and the car 1 is associated with the guide rails 5A and 5B, respectively. A guide roller (not shown) that rotates together is provided to guide the raising and lowering of the car 1. The car 1 is moved up and down by the main rope 3 being hoisted and lowered by the rotational drive of the hoisting machine 4.

  Further, for example, when the descending speed of the car 1 becomes equal to or higher than a preset set speed (hereinafter referred to as an overspeed) for some reason, a safety device is provided for emergency stopping the car 1. The safety device of the present embodiment is provided on the upper portion of the car 1, and has a governor roller 6 that is rotatable in contact with the guide rail 5A and detects the overspeed when the car 1 is lowered. When the overspeed of the car 1 is detected by the governor device 7, the guide is linked via the pulling mechanism 8 and the connecting mechanism 9 (link mechanism). Braking devices 10A and 10B (emergency stop means) for holding the rails 5A and 5B, respectively, and thereby emergency stopping the car 1 are provided.

  The governor device 7 includes a base bracket 11, a swing frame 12 rotatably attached to the base bracket 11, the governor roller 6 rotatably attached to the swing frame 12 around a shaft 13, A pair of pendulums 15 mounted on the governor roller 6 so as to be rotatable about the shaft 14 and rotated by a centrifugal force generated by the rotation of the governor roller 6, and a pair of pendulums 15 so that the displacement of the pair of pendulums 15 is the same. A connecting rod 16 that connects the pendulums 15 to each other, an adjustment spring 17 that is provided between one of the pair of pendulums 15 and the governor roller 6 and has a spring return force that counteracts the rotational force of the pendulum 15; A kick member 19 is attached to the frame 12 so as to be rotatable about a shaft 18.

  For example, when the car 1 is lowered, the governor roller 6 in contact with the guide rail 5 </ b> A rotates counterclockwise in the figure, and the rotational force of the pendulum 13 due to the centrifugal force generated by the rotation of the governor roller 6 is the spring of the adjustment spring 15. When it becomes larger than the return force, the pendulum 13 rotates counterclockwise in the figure. For example, when the pendulum 13 rotates and reaches a predetermined radial position in the governor roller 6 (that is, when the overspeed of the car 1 is detected), the pendulum 13 is on the upper end side (upper side in the figure) of the kick member 17. The kick member 17 is rotated in the clockwise direction in FIG.

  The pulling mechanism 8 is attached to the base bracket 11 so as to be rotatable about the shaft 20, and is attached to the lower end side (lower side in the drawing) of the kick member 19. A slide member 22 that is slidably engaged in the left and right directions in the figure, and attached to both outer sides in the width direction (front and back sides in the figure in the figure) and rotatable in the width direction. Of the pair of sandwiching members 23, a pair of sandwiching members 23, a sandwiching spring (not shown) for applying a turning force for sandwiching the guide rail 5 </ b> A to the pair of sandwiching members 23, One end has a pulling rod 24 connected to the upper end side (the upper side in the figure).

  For example, when the overspeed of the car 1 is not detected by the governor device 7, the slide member 22 is positioned to limit the rotation of the holding member 23 (specifically, a groove formed on the side surface of the holding member 23. Position). On the other hand, for example, when the overspeed of the car 1 is detected by the governor device 7, the slide member 22 moves to the base end side (left side in FIG. 1) of the rotating member 21, and thereby the rotating member 21 is illustrated in the drawing. It is designed to rotate counterclockwise. At the same time, the slide member 22 is in a position where the rotation of the holding member 23 is not restricted, and the holding member 23 holds the guide rail 5A by the urging force of the holding spring, thereby rotating the turning member 21. It comes to be subsidized. Then, the pulling rod 24 is pulled up according to the rotation of the rotating member 21, the braking device 10 </ b> A is operated, and the control device 10 </ b> B is interlocked via the coupling mechanism 9.

  Here, as a major feature of the present embodiment, a counter roller mechanism 26 having a counter roller 25 that is rotatable in contact with the guide rail 5B is disposed on the upper portion of the car 1. Further, a swing support mechanism 27 is provided for supporting the car 1 so that the governor device 7 and the counter roller mechanism 26 can swing together. In addition, a tension bar 28 is provided between the governor roller 6 and the counter roller 25 and applies a pressing force of the governor roller 6 against the guide rail 5A and also applies a pressing force of the counter roller 25 against the guide rail 5B. .

  The counter roller mechanism 26 is rotatable around a shaft 31 on a base bracket 29, a swing lever 30 rotatably attached to the base bracket 29, and a tip end side (upper side in the drawing) of the swing lever 30. And the counter roller 25 attached to the main body.

  The swing support mechanism 27 includes a bottom plate 32 fixed to the upper portion of the car 1, a top plate 33 to which the base bracket 11 of the governor device 7 and the base bracket 29 of the counter roller mechanism 26 are attached, and the bottom plate 32 and the top A plurality of rolling members 34 (three are shown for convenience in FIGS. 1 and 2) disposed between the plates 33 (in detail, a spherical member such as a ball bearing or a cylindrical member such as a roller) The upper plate 33 can swing in the direction between the guide rails 5A and 5B (the left-right direction in the figure).

  The tension bar 28 is telescopically connected to the force generating portion 36 in which the pressing spring 35 is accommodated and the governor roller 6 side (right side in the drawing) of the force generating portion 36, and is movable by the urging force of the pressing spring 35. A shaft portion 37, a governor side connection portion 38 that is fixed to the tip end side (right side in the figure) of the shaft portion 37 and engages the swing frame 12 of the governor device 7, and the counter roller 25 side ( And a counter roller side connecting portion 40 that is connected to the joint portion 39 and engages with the shaft 31 of the counter roller 25.

  Note that the governor roller 6 and the counter roller 25 are configured such that the contact surfaces with the guide rails 5A and 5B are made of an elastic body such as rubber, thereby dealing with uneven portions such as joints of the guide rails 5A and 5B. 1 vibration and noise are reduced.

  In the present embodiment configured as described above, for example, when the car 1 vibrates laterally (specifically, when the distance between the car 1 and the guide rails 5A and 5B varies), the swing support mechanism 27 Therefore, the governor device 7 and the counter roller mechanism 26 are swung as a unit with respect to the car 1, so that vibration can be absorbed. Further, the tension bar 28 can maintain the contact state between the governor roller 6 and the guide rail 5A and the contact state between the counter roller 25 and the guide rail 5B. Further, the tension bar 28 maintains the pressing force of the governor roller 6 against the guide rail 5A at a predetermined value corresponding to the dimension between the guide rails 5A and 5B (in other words, the dimension between the axes of the governor roller 6 and the counter roller 25). can do. In particular, the swing support mechanism 27 integrally supports the governor device 7 and the counter roller mechanism 26 so as to be swingable. Therefore, the swingability of the governor roller 6 and the counter roller 25 is enhanced, and the governor roller 6 by the tension bar 28 is enhanced. The pressing force of the counter roller 25 and the pressing force of the counter roller 25 can be balanced. Therefore, the frictional force between the governor roller 6 and the guide rail 5A can be stabilized, and the detection accuracy of the governor device 7 can be increased. As a result, the certainty of the emergency stop operation by the braking devices 10A and 10B can be improved.

  In this embodiment, the governor device 7 can swing the governor roller 6 via the swing frame 12, and the counter roller mechanism 26 can swing the counter roller 25 via the swing lever 30. Thereby, for example, even if the dimension between the guide rails 5A and 5B slightly varies in the ascending / descending direction of the car 1, it is possible to cope with it.

  In the above-described embodiment, the swing support mechanism 27 has been described as an example of a structure having the bottom plate 32, the upper plate 33, and the plurality of rolling members 34, but is not limited thereto. A modification of such a swing support mechanism will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part equivalent to the said one Embodiment, and description is abbreviate | omitted suitably.

FIG. 4 is a partially enlarged side view for explaining the structure of the swing support mechanism according to the first modification.
In the first modification, the swing support mechanism 27A includes a bottom plate 32 fixed to the top of the car 1, a top plate 33 to which the base bracket 11 of the governor device 7 and the base bracket 29 of the counter roller mechanism 26 are attached. And a plurality of flexible members 41 (three are shown for convenience in FIG. 4) disposed between the bottom plate 32 and the upper plate 33 (specifically, viscoelastic bodies such as rubber, or thin plate springs, for example) Etc.), and the upper plate 33 can swing in the direction between the guide rails 5A and 5B (the left-right direction in the figure) by the flexibility of the flexible member 41.

FIG. 5 is a partially enlarged perspective view for explaining the structure of the swing support mechanism according to the second modification.
In the second modification, the swing support mechanism 27B has a cross-sectional view in which the slide rail 42 fixed to the upper portion of the car 1, the base bracket 11 of the governor device 7, and the base bracket 29 of the counter roller mechanism 26 are attached. A U-shaped slide table 43, and a ball 44 (rolling element) disposed between the slide rail 42 and the slide table 43, and the slide table 42 is located between the guide rails 5A and 5B (see FIG. It can slide in the middle and left and right directions.

  Also in the above modification, the same effect as the above-described embodiment can be obtained.

  Further, in the above-described embodiment, the swing support mechanism 27 supports the governor device 7 and the counter roller mechanism 26 so as to swing together, and the governor device 7 enables the governor roller 6 to swing, and the counter roller mechanism 26. In the above description, the structure in which the counter roller 25 is swingable has been described as an example, but the present invention is not limited to this. That is, for example, the swing support mechanism may support the governor device 7 and the counter roller mechanism 26 so as to be swingable. In this case, the governor device 7 does not have to allow the governor roller 6 to swing. In addition, the counter roller mechanism 26 may not make the counter roller 25 swingable. Also in such a modification, the detection accuracy of the governor device 7 can be increased and the certainty of the emergency stop operation can be improved as in the above-described embodiment.

  In the above embodiment, when the overspeed of the car 1 is detected by the governor device 7, the braking device 10 </ b> A that holds the guide rails 5 </ b> A and 5 </ b> B in conjunction with the pulling mechanism 8 and the coupling mechanism 9. The configuration including 10B has been described as an example, but the configuration is not limited thereto. That is, for example, although not shown, as a stop control means for stopping the hoisting machine 4 that drives the car 1 up and down, for example, the governor device 7 uses the overspeed of the car 1 (however, even if the operating conditions of the braking devices 10A and 10B are the same) It is also possible to provide a switch that switches when a different setting speed is detected, or an electric circuit or a control device that stops the hoisting machine 4 in response to switching of the switch. In this case, the same effect as described above can be obtained.

  In the above description, the case where the present invention is applied to a rope type elevator has been described as an example. However, the present invention is not limited thereto, and may be applied to an elevator such as a hydraulic type, a hydraulic type, or a linear motor type. Needless to say.

1 is a side view showing a schematic configuration of an elevator to which an embodiment of an elevator safety device of the present invention is applied. It is a partial expanded side view showing the important section composition of one embodiment of the elevator safety device of the present invention. It is a partial expanded side view showing the detailed structure of the governor apparatus which comprises one Embodiment of the safety device of the elevator of this invention with a periphery part. It is a partial expanded side view for demonstrating the structure of the rocking | fluctuation support mechanism by the 1st modification of the safety device of the elevator of this invention. It is a partial expansion perspective view for demonstrating the structure of the rocking | fluctuation support mechanism by the 2nd modification of the safety device of the elevator of this invention.

Explanation of symbols

1 Car 4 Winding machine (drive device)
5A Guide rail (first guide rail)
5B Guide rail (second guide rail)
6 Governor roller 7 Governor device 8 Lifting mechanism (link mechanism)
9 Linking mechanism (link mechanism)
10A Braking device (emergency stop means)
10B Braking device (emergency stop means)
25 counter roller 26 counter roller mechanism 27 swing support mechanism 27A swing support mechanism 27B swing support mechanism 28 tension bar

Claims (4)

A first car and a second guide rail that are disposed on one side and the opposite side of the car, and that guides the car in the up-and-down direction; and A governor device that rotates in contact with the guide rail of the vehicle and detects the overspeed of the car, and emergency stop of the car when the overspeed of the car is detected by the governor device In an elevator safety device with emergency stop means,
A counter roller mechanism disposed on the car and having a counter roller rotatable in contact with the second guide rail;
A swing support mechanism for swingably supporting the governor device and the counter roller mechanism with respect to the car;
A tension bar that is connected between the governor roller and the counter roller and applies a pressing force of the governor roller to the first guide rail and also applies a pressing force of the governor roller to the second guide rail; An elevator safety device characterized by that.   2. The elevator safety device according to claim 1, wherein the swing support mechanism supports the governor device and the counter roller mechanism so as to swing together with respect to the car.   2. The elevator safety device according to claim 1, wherein the emergency stop means is disposed in the car and operates via a link mechanism when the overspeed of the car is detected by the governor device. And a braking device for holding the second guide rail.   2. The elevator safety apparatus according to claim 1, wherein the emergency stop means includes stop control means for stopping a driving device that drives the elevator car to move up and down.

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