CN109476452B - Emergency stop device for elevator - Google Patents
Emergency stop device for elevator Download PDFInfo
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- CN109476452B CN109476452B CN201680087764.6A CN201680087764A CN109476452B CN 109476452 B CN109476452 B CN 109476452B CN 201680087764 A CN201680087764 A CN 201680087764A CN 109476452 B CN109476452 B CN 109476452B
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- wedge
- wedge member
- brake
- spring
- emergency stop
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
Abstract
In an emergency stop device of an elevator, a brake wedge member is pulled up and pressed against a guide rail when emergency braking of a lifting body is performed. The wedge member is movable up and down along a wedge guide surface of the housing relative to the housing, and has a wedge joint surface that contacts the wedge guide surface, and an opposed surface that is spaced apart from the wedge joint surface in an upward direction. The spring means provides resistance to upward displacement of the wedge member. The spring device has a nonlinear characteristic having a region in which a change in force due to an increase in the amount of displacement upward of the brake wedge member is smaller than that at the initial stage of displacement.
Description
Technical Field
The present invention relates to an emergency stop device for an elevator, which is mounted on a vertically movable body that moves up and down along a guide rail, and which emergently stops the vertically movable body by a frictional force between a brake wedge member and the guide rail.
Background
Generally, an emergency stop device is mounted on a car of an elevator. The emergency stop device is provided with a wedge-shaped brake member. When the descending speed of the car exceeds a set value, the speed governor operates, the braking member is pressed against the guide rail, and the car is stopped in an emergency by a frictional force generated between the braking member and the guide rail.
At this time, the frictional force, that is, the braking force varies according to the difference in the coefficient of friction between the braking member and the guide rail. That is, even if the vertical resistance for pressing the braking surface of the braking member against the braking surface of the guide rail is fixed, the braking force varies depending on the state of the braking surface, the braking speed, and the like. For example, at the start of deceleration, the braking speed is high and the frictional force is small, so the deceleration is small, and at the end of deceleration, the braking speed is slow and the frictional force is increased, so the deceleration is rapidly increased.
In contrast, in the conventional emergency stop device for an elevator, a wedge is used as a member supporting a generally wedge-shaped braking member, and when the friction coefficient increases, the braking member physically separates from the guide rail, thereby preventing an excessive braking force (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 5-238659
Disclosure of Invention
Problems to be solved by the invention
In the conventional emergency stop device for an elevator as described above, the guide rail, the brake member, the spring, and the like have mechanical dimensional tolerances, and thus, the threshold fluctuation of the excessive braking force due to the increase of the friction coefficient is reduced. Therefore, the dimensional tolerance is strict, and the braking force adjustment at the installation site becomes difficult.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an emergency stop device for an elevator, which can generate a more stable braking force even when a friction coefficient changes or a dimensional tolerance exists.
Means for solving the problems
The emergency stop device for an elevator of the present invention comprises: a frame body which is provided on a lifting body which is guided by a guide rail to lift, and has a reverse wedge guide surface which is away from the guide rail with the upward direction; a brake wedge member that is vertically movable with respect to the housing, that has a braking surface facing the guide rail, and a brake wedge engagement surface that approaches the braking surface as it faces upward, and that is pulled up and pressed against the guide rail when emergency braking of the ascending/descending body is performed; a wedge inverting member that is movable up and down along a wedge inverting guide surface with respect to the housing, has a wedge inverting surface that contacts the wedge inverting guide surface, and an opposing surface that is spaced apart from the wedge inverting surface as it moves upward, and is pressed against the wedge inverting guide surface during emergency braking; and a spring device provided between the housing and the wedge member and providing resistance to upward displacement of the wedge member, wherein the spring device has a nonlinear characteristic in which a change in force due to an increase in the amount of upward displacement with respect to the brake wedge member is smaller than in an initial stage of the displacement.
Effects of the invention
The emergency stop device of elevator of the invention makes the spring device have non-linear characteristic, thus even if the friction coefficient changes or there is dimensional tolerance, the emergency stop device can generate more stable braking force.
Drawings
Fig. 1 is a configuration diagram showing an elevator according to embodiment 1 of the present invention.
Fig. 2 is a main part sectional view showing a normal state of the safety device of fig. 1.
Fig. 3 is a main part sectional view showing a state in which the safety device of fig. 2 is operated.
Fig. 4 is a cross-sectional view showing the spring device of fig. 2 in an enlarged manner.
Fig. 5 is a sectional view showing a state in which the disc spring of fig. 4 is deflected most.
Fig. 6 is a graph showing the relationship between the deflection ratio and the load ratio of a general disc spring.
Fig. 7 is a sectional view showing a 1 st modification of the spring device according to embodiment 1.
Fig. 8 is a cross-sectional view showing a 2 nd modification of the spring device according to embodiment 1.
Fig. 9 is a cross-sectional view showing a 3 rd modification of the spring device according to embodiment 1.
Fig. 10 is a sectional view showing a 4 th modification of the spring device according to embodiment 1.
Fig. 11 is an explanatory diagram showing an initial deflection shape of the disc spring.
Fig. 12 is an explanatory diagram showing a deflection shape in primary mode 1 of the disc spring.
Fig. 13 is an explanatory diagram showing a deflection shape in primary mode 2 of the disc spring.
Fig. 14 is a sectional view showing a 5 th modification of the spring device according to embodiment 1.
Fig. 15 is a main part sectional view showing a normal state of an elevator safety device according to embodiment 2 of the present invention.
Fig. 16 is a main part sectional view showing a state in which the safety device of fig. 15 is operated.
Fig. 17 is a sectional view showing a main part of fig. 15 enlarged.
Fig. 18 is a main part sectional view showing a normal state of an elevator safety device according to embodiment 3 of the present invention.
Fig. 19 is a configuration diagram showing a state of the spring device at the time of operation of the emergency stop device of fig. 18.
Fig. 20 is a main part sectional view showing a normal state of an elevator safety device according to embodiment 4 of the present invention.
Fig. 21 is a main part sectional view showing a state in which the safety device of fig. 20 is operated.
Detailed Description
The following describes a mode for carrying out the present invention with reference to the drawings.
Fig. 1 is a configuration diagram showing an elevator according to embodiment 1 of the present invention. In the figure, a machine room 2 is provided in an upper part of a hoistway 1. The machine room 2 is provided with a hoisting machine 3, a deflector wheel 4, and a control device 5. The hoisting machine 3 includes a drive sheave 6, a hoisting machine motor (not shown) that rotates the drive sheave 6, and a hoisting machine brake (not shown) that brakes the rotation of the drive sheave 6.
A suspension body 7 is wound around the drive sheave 6 and the deflector sheave 4. As the suspension body 7, a plurality of ropes or a plurality of belts are used. The 1 st end of the suspension body 7 is connected to a car 8 as an elevating body. The 2 nd end of the suspension body 7 is connected to a counterweight 9 as a lifting body.
The car 8 and the counterweight 9 are suspended in the hoistway 1 by the suspension body 7, and are raised and lowered in the hoistway 1 by rotating the drive sheave 6. The control device 5 controls the hoisting machine 3 to raise and lower the car 8 at a set speed.
A pair of car guide rails 10 that guide the up-and-down movement of the car 8 and a pair of counterweight guide rails 11 that guide the up-and-down movement of the counterweight 9 are provided in the hoistway 1. A car buffer 12 and a counterweight buffer 13 are provided at the bottom of the hoistway 1.
An emergency stop device 14 for gripping the car guide rail 10 to bring the car 8 into an emergency stop is mounted on a lower portion of the car 8. The safety device 14 is provided with an operating lever 15 for operating the safety device 14.
A speed governor 16 for monitoring the presence or absence of excessive speed travel of the car 8 is provided in the machine room 2. The governor 16 includes a governor sheave 17, an excessive speed detection switch, a rope gripper, and the like. The governor rope 18 is wound around the governor sheave 17.
The governor rope 18 is laid in a loop in the hoistway 1 and connected to the operating lever 15. The governor rope 18 is wound around a tension sheave 19 disposed at a lower portion of the hoistway 1. In fig. 1, the governor rope 18 is drawn behind the car 8 for simplicity, but is actually laid near one car guide rail 10. When the car 8 is raised and lowered, the governor rope 18 is circulated and the governor sheave 17 is rotated at a rotation speed corresponding to the traveling speed of the car 8.
The speed governor 16 mechanically detects whether the traveling speed of the car 8 reaches an excessive speed. As the detected excessive speed, a 1 st excessive speed Vos larger than the line speed Vr and a 2 nd excessive speed Vtr larger than the 1 st excessive speed are set.
When the traveling speed of the car 8 reaches the 1 st excessive speed Vos, the excessive speed detection switch is operated. This cuts off the power supply to the hoisting machine 3, and the car 8 stops in an emergency.
When the descending speed of the car 8 reaches the 2 nd excessive speed Vtr, the governor rope 18 is held by the rope gripper, and the circulation of the governor rope 18 is stopped. Thereby, the operating lever 15 is operated, the safety device 14 is operated, and the car 8 is stopped in an emergency.
Fig. 2 is a main part cross-sectional view showing a normal state of the safety device 14 of fig. 1, and only one side is shown with respect to the car guide rail 10, but actually, the structure is symmetrical to the left and right about the car guide rail 10. The safety device 14 has the same configuration on both sides in the width direction of the car 8, and grips the pair of car guide rails 10 simultaneously when the operating lever 15 is operated. Fig. 3 is a main part sectional view showing a state in which the safety device 14 of fig. 2 is operated.
The emergency stop device 14 includes a housing 21, a wedge backing member 22, a brake wedge member 23, and a spring device 24. The frame 21 includes a cover 25 fixed to a lower portion of the car 8, and a wedge guide member 26 fixed to an inner side of the cover 25. The wedge guide member 26 is provided with a wedge guide surface 26a which is an inclined surface that is spaced apart from the car guide rail 10 as it goes upward.
The wedge member 22 is disposed between the wedge guide surface 26a and the brake wedge member 23, and is movable up and down along the wedge guide surface 26a obliquely with respect to the housing 21. The wedge member 22 has a wedge contact surface 22a that contacts the wedge guide surface 26a, and an opposed surface 22b that is the surface opposite to the wedge contact surface 22 a. The facing surface 22b faces the car guide rail 10 via the brake wedge member 23.
The opposing surface 22b is an inclined surface that moves away from the wedge engaging surface 22a and approaches the car guide rail 10 as it moves upward. That is, the distance between the inverted wedge bonding surface 22a and the opposing surface 22b tapers downward. The wedge-inverted bonding surface 22a and the opposed surface 22b are inclined in directions opposite to each other with respect to the vertical surface.
The brake wedge member 23 is vertically movable along the facing surface 22b with being inclined with respect to the housing 21. That is, the facing surface 22b functions as a brake wedge guide surface for guiding the vertical movement of the brake wedge member 23. The brake wedge member 23 has a brake wedge engagement surface 23a that contacts the facing surface 22b, and a braking surface 23b that faces the car guide rail 10.
The brake wedge engagement surface 23a approaches the braking surface as it faces upward. That is, the gap between the braking wedge engagement surface 23a and the braking surface 23b is tapered upward.
When emergency braking of the car 8 is performed, the brake wedge member 23 is pulled up with respect to the frame 21 and pressed against the car guide rail 10. At this time, the wedge member 22 is pressed against the wedge guide surface 26a by the wedge member 23.
The angle between the inverted wedge guide surface 26a and the opposing surface 22b is larger than the angle between the brake wedge engaging surface 23a and the direction in which the car 8 ascends and descends.
The brake wedge member 23 is provided with an adjustment bolt 27, and the adjustment bolt 27 is an opposing portion that opposes the lower end of the wedge member 22 and abuts against the lower end of the wedge member 22 by upward displacement of the brake wedge member 23. By adjusting the amount of screwing the adjusting bolt 27 into the brake wedge member 23, the distance from the adjusting bolt 27 to the lower end of the wedge member 22 in a normal state can be adjusted.
The spring device 24 is provided between the cover 25 and the upper end of the wedge member 22, and provides resistance to upward displacement of the wedge member 22. The spring device 24 includes a spring seat 28 fixed to the upper end of the wedge member 22, and a disc spring 29 provided on the spring seat 28. The disc spring 29 is held by the spring seat 28.
The spring seat 28 is provided with a deformation restricting portion 28a, and the deformation restricting portion 28a protrudes into the disc spring 29 to mechanically restrict deformation of the disc spring 29 and prevent buckling (bucking) of the disc spring 29.
The spring device 24 has a nonlinear characteristic having a region in which a change in force due to an increase in the amount of displacement upward of the brake wedge member 23 is smaller than that at the initial stage of displacement.
Fig. 4 is a cross-sectional view showing the spring device 24 of fig. 2 in an enlarged manner, and fig. 5 is a cross-sectional view showing a state in which the disc spring 29 of fig. 4 is deflected to the maximum. The inner surface of the disc spring 29 abuts against the deformation restricting portion 28a, thereby preventing the disc spring 29 from being deformed any further.
When the descending speed of the car 8 reaches the 2 nd excessive speed Vtr and the operating lever 15 is pulled up with respect to the car 8 by the governor rope 18, the brake wedge member 23 is pulled up with respect to the housing 21. The brake wedge member 23 is displaced along the facing surface 22b and abuts against the car guide rail 10. When the brake wedge member 23 is pulled up, the disc spring 29 is compressed, and a braking force that presses the brake wedge member 23 against the car guide rail 10 is generated.
At this time, since the upward displacement of the wedge member 22 is smaller than the upward displacement of the brake wedge member 23, the adjusting bolt 27 abuts against the wedge member 22 when the brake wedge member 23 is displaced upward. Then, when the brake wedge member 23 and the wedge member 22 are displaced upward integrally, the brake wedge member 23 and the wedge member 22 try to move away from the car guide rail 10 along the wedge guide surface 26 a. This suppresses the frictional force between the brake wedge member 23 and the car guide rail 10, thereby preventing an excessive braking force from being generated.
Fig. 6 is a graph showing the relationship between the deflection ratio and the load ratio of a general disc spring, and is shown by the ratio of the effective height h0 of the disc spring to the plate thickness t of the material constituting the disc spring. The disc spring, which is non-linear and has the maximum value, has the following characteristics: when h0/t exceeds 1.4, the load does not increase any more even if the deflection increases in the vicinity of the close deflection, i.e., the maximum deflection. Also, this non-linear characteristic increases as h0/t increases.
In embodiment 1, the sensitivity to dimensional tolerance can be reduced by utilizing the nonlinear characteristic of the disc spring, that is, the fixed load independent of the contraction amount in the vicinity of the maximum value. Thus, even when the friction coefficient changes or dimensional tolerance exists, more stable braking force can be generated.
In addition, when the disc spring is used, in fig. 6, it is necessary to make the maximum use limit, which is the upper limit of the reusable range, to the right of the load peak. Even if the load is adjusted to be a fixed load in the vicinity of the load peak, the shrinkage margin needs to be provided from the load peak to the maximum use limit. In addition, in consideration of the load tolerance of the disc spring, the shrinkage margin from the load peak needs to be about 20 to 30% of the reusable range.
Here, fig. 7 is a sectional view showing a 1 st modification of the spring device 24 of embodiment 1, fig. 8 is a sectional view showing a 2 nd modification of the spring device 24 of embodiment 1, fig. 9 is a sectional view showing a 3 rd modification of the spring device 24 of embodiment 1, and fig. 10 is a sectional view showing a 4 th modification of the spring device 24 of embodiment 1.
In modification 1, the coned disc springs 29 are disposed on both surfaces of the spring seat 28. Accordingly, the deformation restricting portions 28a are provided on both surfaces of the spring seat 28. In modification 2, two disc springs 29 are stacked, and each disc spring 29 is held by a corresponding spring seat 29. In modification 3, the combined body of the spring seat 28 and the coned disc spring 29 is overlapped by 4 stages. In modification 4, 3 disc springs 29 and 4 spring seats 28 are stacked.
As shown in these modifications, by arranging 2 or more disc springs 29 in series, the stroke of the entire spring device 24 can be increased, and the adjustment range of the tolerance can be expanded.
Fig. 11 is an explanatory diagram showing an initial deflection shape of the disc spring, fig. 12 is an explanatory diagram showing a deflection shape in primary mode 1 of the disc spring, and fig. 13 is an explanatory diagram showing a deflection shape in primary mode 2 of the disc spring. The bent shape of the disc spring when buckling occurs differs depending on the original shape of the disc spring, the sliding portion, and the like. When a disc spring that flexes as shown in fig. 12 is used as the disc spring 29, the deformation of the disc spring 29 can be restricted by the deformation restricting portion 28a shown in the above example, and buckling can be prevented.
However, when the disc spring 29 is a disc spring that is bent in accordance with the shape of fig. 11 or 13, for example, the deformation restricting portion 30 shown in fig. 14 is required. The deformation restricting portion 30 is formed of a member separate from the spring seat 28, and is covered with the disc spring 29. The deformation restricting portion 30 suppresses deformation of the portion of the abdomen of the disc spring 29 that vibrates. That is, the deformation restricting portion 30 restricts the deformation of the disc spring 29 in the direction bulging outward, and prevents buckling.
By selecting the deformation restricting portions 28a and 30 corresponding to the buckling mode in this way, buckling of the disc spring 29 can be prevented more reliably.
Further, the mode of buckling is also different by friction generated at the contact portion between the disc spring 29 and the spring seat 28, and therefore the mode of buckling can be set in advance by selecting the surface roughness or the material.
The buckling mode can also be set in advance by the shape of the slit or groove provided in the disc spring 29 or the shape of the contact portion between the disc spring 29 and the spring seat 28.
Next, fig. 15 is a main part sectional view showing a normal state of an elevator safety device 14 according to embodiment 2 of the present invention, fig. 16 is a main part sectional view showing a state in which the elevator safety device 14 of fig. 15 operates, and fig. 17 is a sectional view showing a main part of fig. 15 in an enlarged manner. In embodiment 2, a spring device 31 is used instead of the spring device 24 of embodiment 1.
The spring device 31 includes a coil spring 32, a spring seat 33, a disc spring 29, and a stopper bolt 34. The coil spring 32 and the disc spring 29 are arranged in series. The coil spring 32 is disposed on the side of the reverse wedge member 22 of the disc spring 29. The upper end of the disc spring 29 abuts the cover 25. The spring seat 33 is interposed between the coil spring 32 and the disc spring 29.
The lower end of the stopper bolt 34 is screwed into a screw hole provided at the upper end of the wedge member 22 and fixed. The stopper bolt 34 penetrates the coil spring 32, the spring seat 33, the disc spring 29, and the cover 25. The upper end of the stopper bolt 34 protrudes from the cover 25.
The spring seat 33 is provided with a circular recess 33a into which the lower portion of the disc spring 29 is inserted. The stroke of the disc spring 29 is restricted by the inner wall of the recess 33 a. That is, the deformation restricting portion of embodiment 2 is the concave portion 33 a. The other structures and operations are the same as those in embodiment 1.
In the emergency stop device 14, since the spring constant of the disc spring 29 in the low load region is substantially 0, which is smaller than the spring constant of the coil spring 32, and the coil spring 32 and the disc spring 29 are connected in series, when the brake wedge member 23 is pulled up, the coil spring 32 contracts greatly first, and the disc spring 29 easily contracts from the middle. This makes it possible to achieve both the stroke extension and the tolerance adjustment.
The arrangement of the coil spring 32 and the disc spring 29 may be reversed.
Further, the coil spring 32 may be combined with the configuration shown as a modification in embodiment 1.
Next, fig. 18 is a main part sectional view showing a normal state of an elevator safety device 14 according to embodiment 3 of the present invention. In embodiment 3, a spring device 41 is used instead of the spring device 24 of embodiment 1.
The spring device 41 includes a coil spring 42, a spring seat 43, and a rod 44. The upper end of the coil spring 42 is connected to the cover 25. The lower end portion of the coil spring 42 is connected to a spring seat 43. The spring seat 43 can slide in the left-right direction of fig. 18 within a set range. The spring seat 43 is provided with an inclined surface 43 a.
The upper end of the rod 44 is fixed to the cover 25. The lower end of the lever 44 faces the inclined surface 43 a.
Fig. 19 is a configuration diagram showing a state of the spring device 41 at the time of operation of the safety device 14 of fig. 18. When the brake wedge member 23 and the counter wedge member 22 are displaced upward, the coil spring 42 is linearly compressed halfway along the axial direction thereof, and therefore the spring device 41 exhibits linear characteristics.
However, when the rod 44 abuts against the inclined surface 43a, the spring seat 43 is pushed by the rod 44 and slides in the lateral direction. Thereby, the coil spring 42 is bent, and the spring device 41 exhibits nonlinear characteristics. The other structures and operations are the same as those in embodiment 1.
Even if the spring itself does not have the nonlinear characteristic, the entire spring device 41 can be given the nonlinear characteristic by reversibly bending the spring having the linear characteristic during compression, and the same effect as that of embodiment 1 can be obtained.
In embodiments 1 to 3, the structure symmetrical to the left and right about the car guide rail 10 has been described, but a brake piece fixed to the frame 21 so as to face the car guide rail 10 may be disposed on the opposite side of the car guide rail 10 from the brake wedge member 23. In this case, when the brake wedge member 23 is pressed against the car guide rail 10 at the time of emergency braking, the frame 21 is displaced in the horizontal direction with respect to the car guide rail 10, and the brake pad comes into contact with the car guide rail 10.
Next, fig. 20 is a main part sectional view showing a normal state of an elevator safety device according to embodiment 4 of the present invention, and fig. 21 is a main part sectional view showing a state in which the elevator safety device of fig. 20 is operated.
In embodiment 4, the wedge member 22, the spring device 24, and the wedge guide member 26 are disposed on the opposite side of the car guide rail 10 from the brake wedge member 23. The facing surface 22b directly faces the car guide rail 10.
The housing 21 is provided with a brake wedge guide member 51 different from the reverse wedge guide member 26. The brake wedge guide member 51 is provided with a brake wedge guide surface 51a that contacts the brake wedge engagement surface 23 a. The brake wedge guide surface 51a is an inclined surface that approaches the car guide rail 10 as it goes upward.
When the car 8 is suddenly braked, the brake wedge member 23 is pulled up, and when the brake wedge member 23 is pressed against the car guide rail 10, the frame 21 is displaced in the horizontal direction, that is, the right direction in fig. 20, together with the car 8 with respect to the car guide rail 10, and the wedge member 22 is pressed against the car guide rail 10. Thereby, the wedge member 22 is pushed against the wedge guide surface 26a to be displaced upward.
The brake wedge member 23 is raised with respect to the housing 21 to a position where the adjustment bolt 27 abuts against the brake wedge guide member 51. Then, the car 8 decelerates, the coefficient of friction between the wedge member 22 and the car guide rail 10 changes, the frictional force increases, and the coned disc spring 29 elastically deforms, and the wedge member 22 tries to move away from the car guide rail 10 along the wedge guide surface 26 a. This reduces the friction force and adjusts the braking force. The other structures and operations are the same as those in embodiment 1.
As described above, even in the emergency stop device 14 of the type in which the wedge member 22 is disposed on the opposite side of the car guide rail 10 from the brake wedge member 23, the same effect as that of embodiment 1 can be obtained.
Further, the spring device 24 of embodiment 4 can be replaced with another spring device having a nonlinear characteristic, for example, the spring device 31 or 41 of embodiment 2 or 3.
The emergency stop devices according to embodiments 1 to 4 may be mounted on a counterweight, and the present invention may be applied to an emergency stop device mounted on a counterweight.
Claims (14)
1. An emergency stop device for an elevator, comprising:
a frame body which is provided on a lifting body that is guided by a guide rail to lift, and has a reversed wedge guide surface that is away from the guide rail as it goes upward;
a brake wedge member that is movable up and down with respect to the housing, that has a braking surface facing the guide rail, and a brake wedge engagement surface that approaches the braking surface as it faces upward, and that is pulled up and pressed against the guide rail when emergency braking of the ascending/descending body is performed;
a wedge member that is movable up and down along the wedge guide surface with respect to the housing, and that has a wedge engagement surface that comes into contact with the wedge guide surface and an opposing surface that is spaced apart from the wedge engagement surface in an upward direction, and that is pressed against the wedge guide surface during emergency braking; and
a spring device provided between the frame and the inverted wedge member and providing resistance to upward displacement of the inverted wedge member,
the spring device has a nonlinear characteristic having a region in which a change in force due to an increase in the amount of displacement upward of the brake wedge member is smaller than an initial stage of displacement, and a fixed load that does not depend on the amount of contraction near a maximum value.
2. The emergency stop device of an elevator according to claim 1,
the spring device has a disk spring.
3. The emergency stop device of an elevator according to claim 2,
the spring device is provided with a deformation restricting portion that mechanically restricts the deformation of the disc spring and prevents buckling of the disc spring.
4. The emergency stop device of an elevator according to claim 2 or 3, wherein,
two or more of the disc springs are arranged in series to overlap each other.
5. The emergency stop device of an elevator according to claim 2 or 3, wherein,
the spring device also has a coil spring arranged in series with the disc spring.
6. The emergency stop device of an elevator according to claim 4,
the spring device also has a coil spring arranged in series with the disc spring.
7. The emergency stop device of an elevator according to any one of claims 1 to 3,
the inverse wedge member is disposed between the inverse wedge guide surface and the brake wedge member,
the brake wedge engaging surface is in contact with the opposing surface,
the brake wedge member is provided with an opposing portion that opposes the lower end of the wedge member and abuts against the lower end of the wedge member by upward displacement of the brake wedge member.
8. The emergency stop device of an elevator according to claim 4,
the inverse wedge member is disposed between the inverse wedge guide surface and the brake wedge member,
the brake wedge engaging surface is in contact with the opposing surface,
the brake wedge member is provided with an opposing portion that opposes the lower end of the wedge member and abuts against the lower end of the wedge member by upward displacement of the brake wedge member.
9. The emergency stop device of an elevator according to claim 5,
the inverse wedge member is disposed between the inverse wedge guide surface and the brake wedge member,
the brake wedge engaging surface is in contact with the opposing surface,
the brake wedge member is provided with an opposing portion that opposes the lower end of the wedge member and abuts against the lower end of the wedge member by upward displacement of the brake wedge member.
10. The emergency stop device of an elevator according to claim 6,
the inverse wedge member is disposed between the inverse wedge guide surface and the brake wedge member,
the brake wedge engaging surface is in contact with the opposing surface,
the brake wedge member is provided with an opposing portion that opposes the lower end of the wedge member and abuts against the lower end of the wedge member by upward displacement of the brake wedge member.
11. The emergency stop device of an elevator according to any one of claims 1 to 3,
the frame body is provided with a brake wedge guide surface contacting with the brake wedge joint surface,
the wedge inverting member is disposed on the opposite side of the guide rail from the brake wedge member.
12. The emergency stop device of an elevator according to claim 4,
the frame body is provided with a brake wedge guide surface contacting with the brake wedge joint surface,
the wedge inverting member is disposed on the opposite side of the guide rail from the brake wedge member.
13. The emergency stop device of an elevator according to claim 5,
the frame body is provided with a brake wedge guide surface contacting with the brake wedge joint surface,
the wedge inverting member is disposed on the opposite side of the guide rail from the brake wedge member.
14. The emergency stop device of an elevator according to claim 6,
the frame body is provided with a brake wedge guide surface contacting with the brake wedge joint surface,
the wedge inverting member is disposed on the opposite side of the guide rail from the brake wedge member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/071851 WO2018020572A1 (en) | 2016-07-26 | 2016-07-26 | Elevator emergency stop device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109476452A CN109476452A (en) | 2019-03-15 |
| CN109476452B true CN109476452B (en) | 2021-02-26 |
Family
ID=61015740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680087764.6A Active CN109476452B (en) | 2016-07-26 | 2016-07-26 | Emergency stop device for elevator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6570751B2 (en) |
| CN (1) | CN109476452B (en) |
| WO (1) | WO2018020572A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111164038B (en) * | 2017-10-06 | 2021-03-26 | 三菱电机株式会社 | Emergency stop device for elevator |
| EP3569546A1 (en) * | 2018-05-18 | 2019-11-20 | Otis Elevator Company | Elevator safety gear |
| CN114746353B (en) * | 2019-12-09 | 2023-07-04 | 三菱电机株式会社 | Elevator and emergency stop device thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103763A (en) * | 1985-06-06 | 1986-12-03 | 三菱电机株式会社 | Emergency braking device for elevators |
| DE3706802A1 (en) * | 1987-03-03 | 1988-09-15 | Karlheinz Menkhoff | Speed limiter with safety brakes, e.g. for lift cars |
| CN1860077A (en) * | 2003-10-07 | 2006-11-08 | 奥蒂斯电梯公司 | Remotely resettable ropeless emergency stopping device for an elevator |
| CN107176523A (en) * | 2017-07-20 | 2017-09-19 | 广州日滨科技发展有限公司 | Elevator safety gear device to test platform and method of testing |
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| FI74686C (en) * | 1986-05-06 | 1988-03-10 | Kone Oy | Prisoner, for example for lift basket or counterweight. |
| FI98295C (en) * | 1991-11-18 | 1997-05-26 | Kone Oy | catching device |
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| JP2007238225A (en) * | 2006-03-07 | 2007-09-20 | Toshiba Elevator Co Ltd | Emergency stop device and elevator |
| KR101827068B1 (en) * | 2012-08-02 | 2018-02-07 | 미쓰비시덴키 가부시키가이샤 | Emergency stop device for elevator |
| CN102795526B (en) * | 2012-08-28 | 2014-12-10 | 刘德民 | Progressive rope gripper and progressive overspeed protection safety device for dragging type lifting device |
| JP2014065591A (en) * | 2012-09-27 | 2014-04-17 | Hitachi Ltd | Elevator including emergency stop device |
| CN203497872U (en) * | 2013-10-24 | 2014-03-26 | 宁波赛富特电梯部件有限公司 | Safety tongs |
| DE102014004356A1 (en) * | 2014-03-27 | 2015-10-01 | Thyssenkrupp Elevator Ag | Braking device for a car of an elevator system |
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2016
- 2016-07-26 WO PCT/JP2016/071851 patent/WO2018020572A1/en active Application Filing
- 2016-07-26 JP JP2018530230A patent/JP6570751B2/en active Active
- 2016-07-26 CN CN201680087764.6A patent/CN109476452B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103763A (en) * | 1985-06-06 | 1986-12-03 | 三菱电机株式会社 | Emergency braking device for elevators |
| DE3706802A1 (en) * | 1987-03-03 | 1988-09-15 | Karlheinz Menkhoff | Speed limiter with safety brakes, e.g. for lift cars |
| CN1860077A (en) * | 2003-10-07 | 2006-11-08 | 奥蒂斯电梯公司 | Remotely resettable ropeless emergency stopping device for an elevator |
| CN107176523A (en) * | 2017-07-20 | 2017-09-19 | 广州日滨科技发展有限公司 | Elevator safety gear device to test platform and method of testing |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018020572A1 (en) | 2018-02-01 |
| JPWO2018020572A1 (en) | 2018-11-22 |
| JP6570751B2 (en) | 2019-09-04 |
| CN109476452A (en) | 2019-03-15 |
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