JP2008254837A - Emergency stop device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency stop device for an elevator capable of obtaining desired braking force during operation. <P>SOLUTION: The emergency stop device for the elevator comprises wedge pieces 9 provided in a lifting/lowering body lifted/lowered along a guide rail 1 and relatively lifted with respect to the lifting/lowering body along the guide rail 1 in an emergency and pressing bodies 6 pressing the wedge pieces 9 against the guide rail 1. The emergency stop device for the elevator is provided with rail nipping devices 11 arranged so as to be connected and fixed to the wedge pieces 9 and nipping the surface of the guide rail 1 earlier than contact of the wedge pieces 9 with the guide rail 1 cooperatively with operating mechanisms 10 operated in an emergency all the time so that friction force generated at the time of nipping is applied to the direction to relatively lift the wedge pieces 9 along the guide rail 1 with respect to the lifting/lowering body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an emergency stop device for an elevator that brakes an elevating body that descends excessively.

A conventional elevator safety device is provided on a lifting body that moves up and down along a guide rail. In an emergency, a wedge piece that rises relative to the lifting body that moves down along the guide rail and the wedge It consists of a pressing body that presses the piece against the guide rail, and the wedge piece is brought into contact with the guide rail by an operating mechanism that operates in an emergency, whereby the lifting body is braked by the frictional force between the wedge piece and the guide rail. Yes. 18-20 is a figure which shows the conventional emergency stop apparatus for elevators shown by patent document 1, for example. 18 is a front view showing a main part of a conventional safety device, FIG. 19 is a side view seen from the direction A shown in FIG. 18, and FIG. 20 is a partial sectional view of the safety device shown in FIG.

In the figure, 1 is a guide rail standing on a hoistway (not shown) of an elevator, 2 is a guide portion of a guide rail protruding on the hoistway side along the longitudinal direction of the guide rail, and 3 is guiding to this guide portion. The lifting body 4 is moved up and down, 4 is a frame body provided on the back side of the bottom surface of the lifting body 3, and 5 is an emergency stop device provided in the frame body 4 and over the bottom surface side of the frame body 4. In FIG. 20, a pair of pressing bodies 6 constituting the safety device 5 includes two pieces of members 6 a and 6 b that are formed almost symmetrically with the guide portion 2 of the guide rail 1 interposed therebetween. The surface constitutes an inclined surface 7 farther from the guide portion 2 from the upper side to the lower side.

A roller device 8 is slidably provided along the inclined surface 7 and is disposed at a lowered position shown in FIG. 20 during normal operation, that is, during operation at the rated speed of the elevator, and 9 is a roller device 8 and a guide portion. 2 is a pair of wedge pieces having a tapered shape at the upper end. Since the wedge piece 9 is normally disposed at the lowered position shown in FIG. 20, it is separated from the guide portion 2. Reference numeral 10 denotes a link mechanism, which is an operating mechanism that operates in an emergency in which one side is connected to a wedge piece 9 and the other is connected to a governor rope (not shown).

Next, the operation will be described. The conventional emergency stop device for an elevator is configured as described above, and when the elevating body 3 descends at a speed exceeding a predetermined value, the wedge piece 9 is pushed up along the slope 7 by the action of the governor rope and the operating mechanism 10. The guide rail 1 is brought into contact with the guide portion 2. At this time, a frictional force is generated when the wedge piece 9 and the guide portion 2 come into contact with each other. This frictional force acts in a direction in which the wedge piece 9 is raised relative to the lifting body 3 along the guide rail 1.

On the other hand, since the elevating body 3 continues to descend, the wedge piece 9 is displaced upward relative to the elevating body 3. As a result, the wedge piece 9 is raised along the slope 7 by the roller device 8. Then, as the wedge piece 9 moves up, the force pressing the wedge piece 9 against the guide portion 2 gradually increases, and the wedge piece 9 stops immediately when it reaches the upper end of the slope 7 and is fixed in that position. Here, the braking force generated by the emergency stop 5 is maximized to brake the overspeed descent of the lifting body 3.

JP 2001-341957 A (page 8, FIGS. 8 to 10)

However, according to the conventional emergency stop device for an elevator as described above, the surface of the guide rail of the elevator is generally relatively large in a new state, and a predetermined frictional force is applied when a wedge piece or the like comes into contact. Although it is easy to obtain, if the elevator is used for a considerable period of time, the surface of the guide rail is always in contact with the shoe surface of the guide shoe. The surface has a relatively small roughness, and when a wedge piece or the like comes into contact, it becomes difficult to obtain a predetermined frictional force.

In this state, for example, in an elevator emergency stop device that has been used for a considerable period of time, when the wedge piece comes into contact with the guide rail, slippage occurs on the contact surface, or the wedge piece moves up and down along the guide rail. Insufficient frictional force may be generated that rises relative to the body. At this time, the wedge piece may not immediately rise relative to the lifting body along the guide rail, thereby delaying the braking start timing of the emergency stop device and increasing the stopping distance of the lifting body beyond a predetermined value. There is a problem that the desired braking force cannot be obtained due to the increase in length.

In addition, if dust or excess oil adheres to the guide rail, slippage may occur on the contact surface between the guide rail surface and the wedge piece, and a predetermined frictional force may not be obtained, thereby reducing the braking force. There has been a problem that the stopping distance of the lifting body becomes longer than a predetermined length.

The present invention has been made to solve the above problems, and an object thereof is to obtain a desired braking force in an emergency stop device for an elevator.

An emergency stop device for an elevator according to the present invention is provided in a lifting body that moves up and down along a guide rail. In an emergency, a wedge piece that rises relative to the lifting body along the guide rail and the wedge In an emergency stop device for an elevator composed of a pressing body that presses a piece against the guide rail, the guide rail surface is moved earlier than the wedge piece contacts the guide rail, always in conjunction with an operating mechanism that operates in an emergency. A rail pinching device for pinching is provided.

An elevator safety device according to the present invention is provided in a lifting body that moves up and down along a guide rail, and in an emergency, a wedge piece that rises relative to the lifting body along the guide rail; In the emergency stop device for elevators, which comprises a pressing body that presses the wedge piece against the guide rail, the rail pinching device pinches the surface of the guide rail not only in an emergency but at a predetermined timing and automatically slides. It is provided with adjusting means for wiping.

According to the present invention, by attaching the rail pinching device to the emergency stop device for an elevator, it is possible to generate a frictional force acting in a direction in which the wedge piece is relatively lifted with respect to the lifting body that is lowered along the guide rail. . For this reason, it becomes possible to operate normally without delaying the braking of the emergency stop device regardless of the frictional force when the wedge piece comes into contact with the guide rail. Moreover, the braking performance of the emergency stop device can be improved.

Embodiment 1 FIG.
1-4 is a figure which shows the emergency stop apparatus for elevators which comprised the rail pinching apparatus based on Embodiment 1 of this invention, and FIG. 1 is FIG. 20 of the above-mentioned conventional emergency stop apparatus for elevators. It is a fragmentary sectional view showing an emergency stop device equivalent to. FIG. 2 is a partial cross-sectional view showing a rail clamping device corresponding to the wedge piece 9 of FIG. 20 of the above-described conventional elevator safety device. FIG. 3 is a front view showing a main part corresponding to FIG. 18 of the above-described conventional elevator safety device. FIG. 4 is a side view showing a main part of the emergency stop device for an elevator as viewed from the direction A in FIG. FIG. 5 to FIG. 6 are step-by-step diagrams showing the ascending of the wedge piece assembly during operation of the elevator safety device.

In FIG. 2, the rail clamping device 11 is fixed to the inner surface of the curved portion of the U-shaped mounting bracket 13, sandwiched by the mounting bracket 13 below the wedge piece 9, and connected and fixed through the bolts 14. It arrange | positions so that the operation | movement of the wedge piece 9 may be interlocked. The rail pinching device 11 includes a frame body 12, a cylinder 15, a compression spring 16, a sliding body 17, and a shaft 18.

The frame body 12 is cylindrical, one end face is opened, the other end face is closed, and a hole through which the shaft 18 is slidable in the axial direction is provided at the center of the closed end face. The cylinder 15 has a cylindrical shape, one end face is opened, the other end face is closed, a hole through which the shaft 18 passes is provided at the center of the closed end face, and the end face of the penetrating shaft 18 comes off the cylinder 15. The nut 19 is attached and fixed so that there is no. The inner diameter of the frame body 12 is slightly larger than the outer shape of the cylinder 15, and the open end face side of the cylinder 15 is fitted into the open end face side of the frame body 12 so as to sandwich the compression spring 16.

A shaft 18 is attached through the frame body 12, the compression spring 16 and the cylinder 15 so that the cylinder 15 can smoothly slide on the inner surface of the frame body 12. A groove for fastening the screw 20 is provided at the end of the shaft 18 to which the nut 19 is attached, and the sliding body 17 is attached so as to cover the nut 19 and is fixed to the shaft 18 by the screw 20. A surface of the sliding body 17 that sandwiches the guide portion 2 of the guide rail 1 is made of a material softer than the rail, such as rubber or resin.

In FIG. 1, the wedge piece 9 to which the rail clamping device 11 is connected and fixed is provided between the roller device 8 and the guide portion 2 of the guide rail 1. The stopper 21 is fixed to the frame 4 of the elevating body 3 with bolts 22. The stopper 21 is provided with a slit 23 having a width slightly larger than the diameter of the shaft 18 and smaller than the diameter of the bolt head of the shaft 18 and opened upward in the vertical direction. A wedge-shaped inclined surface 24 whose thickness gradually decreases in the upper length direction is provided on the end surface of the slit 18 on the bolt head side of the shaft 18.

Just before the position where the wedge piece 9 is fixed not in an emergency, but in a normal state, the wedge-shaped opening portion above the slit 23 where the stopper 21 is opened is fitted into the shaft directly below the bolt head in the longitudinal direction of the shaft 18. Then, the shaft 18 is slid in the lower direction along the slit 23 as it is. When the wedge piece 9 connected and fixed to the rail pinching device 11 is linked to this slide and slides to a position where it is normally fixed, the wedge piece 9 is fixed at that position, and the rail pinching device 11 is fixed to the stopper 21. The At this time, the thickness of the slit 21 of the stopper 21 is adjusted so that the compression spring 16 is compressed to a necessary level.

In FIG. 1, the state of the wedge piece 9 before the safety device 5 operates is shown. By the stopper 21 fixed to the frame body 4, the shaft 18 of the rail pinching device 11 of the wedge piece 9 is pulled, and the compression spring 16 is fixed while being compressed. Therefore, there is a gap between the sliding body 17 of the rail pinching device 11 and the guide portion 2 of the guide rail 1, and the rail pinching device 11 does not operate during normal operation of the elevator.

FIG. 5 is a state diagram in which the operation mechanism 10 of the safety device 5 is operating. The wedge piece 9 is guided by the roller device 8 and rises along the slope 7 of the pressing body 6 by the operating mechanism 10. At this time, since the shaft 18 of the rail clamping device 11 is disengaged from the slit 23 of the stopper 21, the compression spring 16 is opened and the sliding body 17 is pressed against the guide portion 2 of the guide rail 1. By this operation, the rail pinching device 11 can pinch the guide portion 2 of the guide rail 1 earlier than the sliding surface of the wedge piece 9. Since the frictional force generated here assists the raising of the wedge piece 9, the emergency stop device 5 can be reliably braked.

FIG. 6 is a state diagram in which the operation mechanism 10 of the safety device 5 is completed. When the elevating body 3 is lowered, the wedge piece 9 is relatively raised along the inclined surface 7 by the roller device 8 due to a frictional force generated while being sandwiched between the guide portions 2 of the guide rail 1. When the wedge piece 9 reaches the upper end of the slope 7, it immediately stops and is fixed at that position. Here, the braking force generated by the emergency stop device 5 is maximized to brake the overspeed descent of the lifting body 3.

Embodiment 2. FIG.
FIGS. 7-9 is a figure which shows the emergency stop apparatus for elevators which has arrange | positioned and comprised the rail pinching apparatus which concerns on Embodiment 2 of this invention, and the rail pinching apparatus 11 which concerns on Embodiment 1 is a guide rail surface. When sandwiched, a means for automatically wiping while sliding on the surface of the guide rail is incorporated.

FIG. 7 is a partial cross-sectional view of rail clamping device 25 according to Embodiment 2 of the present invention. In the figure, the rail pinching device 25 is different from the rail pinching device 11 according to the first embodiment in the lengthwise direction of the guide portion 2 of the guide rail 1, opposite to the traveling direction of the elevating body 4, 26, and a valve 27 that opens only in the same direction is provided at the upper end thereof, and a sliding body 29 having a space 28 for storing guide rail oil, dust and the like is attached. (The contact surface of the sliding body 29 and the guide portion 2 of the guide rail 1 is indicated by the hatched portion in the center figure.) The sliding body 29 is composed of a sliding body a30 and a sliding body b31 attached to the shaft 18, and includes a bolt 32. To fix.

Since the sliding body 29 stores the removed guide rail oil and dust in the space 28 and confines the stored guide rail oil and dust in the space 28 by the valve 27, the sliding body 29 enters the hoistway of the removed guide rail oil and dust. Can be prevented and reattachment to the guide portion 2 of the guide rail 1 can be prevented. Since the surface of the sliding body 29 that sandwiches the guide portion 2 of the guide rail 1 is made of a material softer than the guide rail 1 such as rubber or resin, it adheres to the guide rail without damaging the guide portion 2 of the guide rail 1. Oil and dust can be removed.

FIG. 8 is a diagram showing stepwise the movement of the guide rail oil and dust 33 adhered to the guide portion 2 of the guide rail 1 and the guide rail oil and dust 33 being cleaned by the rail pinching device 25. When the rail clamping device 25 is operated, oil, guide rail oil, dust 33 and the like adhering to the guide portion 2 of the guide rail 1 are collected at the center of the sliding body 29 by the inclined portion 26 provided on the sliding body 29 and collected. Guide rail oil and dust 33 are stored in the space 28 through a valve 27 that opens in one direction.

FIG. 9 shows the structure of the space 28. The sliding body a30 and the sliding body b31 are configured to be detachable and separable by bolts 32 and screws 34. Therefore, the guide rail oil and dust 33 stored in the space 28 can be easily removed and cleaned by removing the sliding body a30 and the sliding body b31 as needed by a maintenance worker or the like. After that, the removed slide body a30 and slide body b31 can be attached and reused with the same shape as before removal.

The shape of the sliding body 29 is different from the shape of the sliding body 17 in the first embodiment, but is the same as the material constituting the surface where the sliding body 17 in the first embodiment contacts the guide portion 2 of the guide rail 1. If the surface which contacts the guide part 2 of the guide rail 1 of the sliding body 29 is comprised with the thing or material which has an equivalent function, the rail clamping device 25 will be a single unit, and the function of sandwiching the guide part 2 of the guide rail 1 and cleaning. It can be a means having the function of simultaneously.

Embodiment 3 FIG.
FIGS. 10-13 is a figure which shows the emergency stop apparatus for elevators which has arrange | positioned and comprised the rail pinching apparatus based on Embodiment 3 for implementing this invention, The rail pinching apparatus 25 which concerns on Embodiment 2 In addition, independent of the operating mechanism that operates in an emergency, the adjusting means that is set to operate when the elevating body 3 is in either the up or down state, and the elevating speed of the elevating body 3 The apparatus which controls the adjustment means set to operate | move according to this is integrated in the rail pinching apparatus.

In the figure, a DC generator 35 is installed below the safety device 5, and a disk 37 is attached to the rotary shaft 36. The disc 37 is installed so that the end of the outer peripheral portion made of a material that transmits a frictional force is always in contact with the guide portion 2 of the guide rail 1, and the rotating shaft 36 rotates as the elevating body 3 moves up and down. Then, the DC generator 35 generates power.

In the case of the figure, the DC generator 35 is attached to the lower side of the safety device 5, but may be provided on the upper side of the lifting body 3. Further, since the rotational speed of the DC generator 35 can be adjusted by adjusting the size of the diameter of the disk 37, the amount of power generation can be adjusted within a certain range.

In FIG. 12, a coil 40 is wound around the iron core 39 of the rail pinching device 38 in a certain direction, and the magnet 41 is attached to the back surface of the sliding body 29 so that the N pole faces the end of the iron core 39. When the elevating body 3 is raised, the DC generator 35 generates power by rotating the disk 37 counterclockwise. By this power generation, a current flows through the coil 40, and the sliding body 29 side of the iron core 39 is magnetized to the S pole and the other to the N pole according to the right-handed screw law. Since the sliding body 29 side of the iron core 39 faces the north pole of the magnet 41 of the sliding body 29, a magnetic attractive force is generated during this time. This suction force creates a gap between the guide portion 2 of the guide rail 1 and the sliding body 29, so that the rail cleaning is not performed when the elevating body 3 is raised.

Further, when the elevating body 3 is lowered, the disk 37 rotates in the clockwise direction, and the DC generator 35 generates electricity having a polarity opposite to that of the electricity generated when it is raised. Due to the power generation, a current in the direction opposite to that of the coil 40 flows through the coil 40, and the sliding body 29 side of the iron core 39 is magnetized to the N pole and the other to the S pole according to the right-handed screw law. Since the sliding body 29 side of the iron core 39 faces the north pole of the magnet 41 of the sliding body 29, a repulsive force of magnetic force is generated during this period. By the action of the repulsive force, the sliding body 29 presses the guide portion 2 of the guide rail 1 and the sliding body 29 comes into contact with the surface of the guide portion 2 of the guide rail 1 to perform cleaning.

In the power generation of the DC generator 35 in the third embodiment, the rotating shaft 36 of the DC generator 35 may be attached to the rotating shaft of the suspension vehicle attached to the lifting body 3. As the lifting body 3 is raised or lowered, the main rope suspended on the suspension vehicle moves in one direction in the longitudinal direction when the lifting body 3 is lifted, and in the opposite direction when the lifting body 3 is lowered. Then, when the rotating shaft of the suspension wheel rotates, the rotating shaft 36 of the DC generator 35 rotates to generate power.

FIG. 14 is a control circuit diagram 1 according to the third embodiment. In the figure, a DC generator 35, an iron core 39 around which a coil 40 is wound, and a load regulator a42 are connected in series to constitute a series circuit.

In FIG. 15, in the upper graph (a), the horizontal axis indicates time, the vertical axis indicates the speed and direction of the elevating body 3, the upper side of the vertical axis indicates when the elevating body 3 is raised, and the lower side is when it is lowered. In the lower graph (b) of FIG. 13b, the horizontal axis indicates time, the vertical axis indicates the current value I, the upper side of the vertical axis indicates when the lifting body 3 is raised, and the lower side indicates when it is lowered. The time axes of the graph (a) and the graph (b) in FIG. 15 are synchronized. According to these graphs, since the polarity of the direct current I generated when the lifting body 3 is raised or lowered has a constant relationship according to each, the lifting direction of the lifting body 3 can be determined by detecting this polarity. Can be identified. Further, since the direct current value I in the graph (b) of FIG. 15 is proportional to the speed of the lifting body 3, the lifting speed can be specified by detecting this current value.

Here, only in the operating range in the graph (b) of FIG. 15, the value of the current flowing through the coil 40 is changed by the amount of power generated by the DC generator 35 and the effect of the repulsive force due to the magnetic force of the iron core 39 by the load adjuster a42. 29 is pressed against the surface of the guide portion 2 of the guide rail 1, and the operation condition of the rail pinching device 38 is set by adjusting so that cleaning is performed.

By setting the operating conditions, for example, the rail clamping device 38 can be set to operate only when the elevating body 3 is in the descending state and is in a constant ascending / descending speed region. As described above, the rail pinching device 38 can control setting means for performing cleaning only when the lifting body 3 is raised or lowered and only in a certain lifting speed region by setting the operating conditions.

FIG. 16 is a control circuit diagram 2 according to the third embodiment. This is a circuit diagram applied when the amount of power generated by the DC generator 35 is small, such as when the rated speed of the lifting body 3 is low, and the rail clamping device 38 cannot be operated with this power alone.

In FIG. 16, a load regulator b43 is connected in series to the plus side of the DC generator 35, one of the load regulators b43 is connected to the base side (B) of the transistor 44, and the emitter side (E) of the transistor 44 is connected. Connect the negative side of the DC generator 35. Further, the positive side of the DC power supply 45 is connected to the load adjuster a42, the load adjuster a42 and the coil 40 iron core 39 are connected in series, and one of the coils 40 iron core 39 is connected to the collector side (C) of the transistor 44. Then, the emitter side (E) of the transistor 44 is connected to the negative side of the DC power supply 45.

The load adjuster b43 adjusts the base current of the transistor 44 that flows by the power generation of the DC generator 35, and adjusts the range in which the (C)-(E) of the transistor 44 is conductive. Further, the value of the current flowing through the coil 40 is adjusted by the load adjuster a42, and the force by which the repulsive force of the magnetic force in the coil 40 iron core 39 presses the guide portion 2 of the guide rail 1 is adjusted.

In FIG. 17, in the upper graph (a), the horizontal axis indicates time, the vertical axis indicates the speed and direction of the elevating body 3, the upper side of the vertical axis indicates when the elevating body 3 is raised, and the lower side indicates when it is lowered. In the middle graph (b) of FIG. 17, the horizontal axis indicates time, the vertical axis indicates the current value I flowing between (B) and (E) of the transistor 44, the upper side of the vertical axis is when the elevator 3 is raised, and the lower side is Indicates the time of descent. In the lower graph (c) of FIG. 17, the horizontal axis represents time, and the vertical axis represents the current value I flowing when the repulsive force of the magnetic force in the coil 40 core 39 acts. The time axes of graphs (a) to (c) in FIG. 17 are synchronized.

According to these graphs, since the polarity of the direct current I generated when the lifting body 3 is raised or lowered has a constant relationship according to each, the lifting direction of the lifting body 3 can be determined by detecting this polarity. Can be identified. Moreover, since the direct current value I of the graph (b) of FIG. 17 has a relationship proportional to the speed of the raising / lowering body 3, the raising / lowering speed can be specified by detecting this current value.

Here, when the connection between (C) and (E) of the transistor 44 is brought into conduction, the action of the repulsive force due to the magnetic force of the iron core 39 guides the sliding body 29 by the load regulator a42. Press against the surface of the guide portion 2 of the rail 1 and adjust so that cleaning is performed. Further, only in the operating range in the graph (b) of FIG. 17, while adjusting the power generation amount of the DC generator 35 and the load regulator b 43 so that the connection between (C) and (E) of the transistor 44 is conducted, The operating condition of the rail pinching device 38 is set by adjusting the base current value.

By setting the operating conditions, even if the power generation amount of the DC generator 35 is small, such as when the rated speed of the lifting body 3 is low, and the rail clamping device 38 cannot be operated with this power alone, It is possible to set the rail pinching device 38 to operate only when the body 3 is in a descending state and is in a constant lifting speed region. As described above, the rail pinching device 38 can control setting means for performing cleaning only when the lifting body 3 is raised or lowered and only in a certain lifting speed region by setting the operating conditions.

Further, by forcibly turning on the transistor 44 during maintenance, the guide portion 2 of the guide rail 1 can be arbitrarily cleaned.

It is a fragmentary sectional view which shows the emergency stop apparatus for elevators which is Embodiment 1 of this invention. It is a fragmentary sectional view which shows the rail clamping device of FIG. It is a front view which shows the principal part of the emergency stop apparatus for elevators which is Embodiment 1 of this invention. It is a side view which shows the principal part of the emergency stop apparatus for elevators seen from the direction of A in FIG. It is a state figure in which the action mechanism of the emergency stop device for elevators which is Embodiment 1 of this invention is operating. It is the state figure which the operation | movement mechanism of the emergency stop apparatus for elevators which is Embodiment 1 of this invention completed operation | movement. It is a fragmentary sectional view of the rail clamping device which is Embodiment 2 of this invention. It is the figure which showed stepwise the movement by which the guide rail oil and dust adhering to the guide part of the guide rail shown in Embodiment 2 of this invention are cleaned by the rail clamping device. It is a figure which shows the structure of the removed guide rail oil shown in Embodiment 2 of this invention, or the space to store. It is a front view which shows the principal part of the emergency stop apparatus for elevators which is Embodiment 3 of this invention. It is a side view which shows the principal part of the emergency stop apparatus for elevators seen from the direction of A in FIG. It is a fragmentary sectional view when the rail clamping apparatus shown in Embodiment 3 of this invention is not operating. It is a fragmentary sectional view when the rail clamping device shown in Embodiment 3 of this invention is operating. FIG. 3 is a control circuit diagram 1 shown in a third embodiment of the present invention. It is a graph which shows the speed, direction, and electric current value of a raising / lowering body when using the control circuit of FIG. FIG. 3 is a control circuit diagram 2 shown in a third embodiment of the present invention. It is a graph which shows the speed, direction, and electric current value of a raising / lowering body when using the control circuit of FIG. It is a front view which shows the principal part of the conventional emergency stop apparatus. It is sectional drawing seen from the direction of A shown in FIG. It is a fragmentary sectional view of the safety device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide rail, 2 Guide part (guide rail), 3 Lifting body, 4 Frame body, 5 Emergency stop device, 6 Pressing body, 6a Member, 6b Member, 7 Inclined surface, 8 Roller device, 9 Wedge piece, 10 Actuating mechanism 11 Rail clamping device, 12 Frame, 13 Mounting bracket, 14 Bolt, 15 Cylinder, 16 Compression spring, 17 Slider, 18 Shaft, 19 Nut, 20 Screw, 21 Stopper, 22 Bolt, 23 slit, 24 Inclined surface, 25 Rail sandwiching device, 26 Inclined part, 27 Valve, 28 Space, 29 Slider, 30 Slider a, 31 Slider b, 32 Bolt, 33 Guide rail oil and dust, 34 Screw, 35 DC generator,
36 rotating shaft, 37 disc, 38 rail clamping device, 39 iron core, 40 coils, 41 magnet, 42 load regulator a, 43 load regulator b, 44 transistor, 45 DC power supply

  The present invention can be applied to an emergency stop device for an elevator.

Claims (5)

A wedge piece that is provided on a lifting body that moves up and down along the guide rail, and that rises relative to the lifting body along the guide rail in an emergency; and a pressing body that presses the wedge piece against the guide rail; An elevator emergency stop device comprising: the wedge piece is connected and fixed to the wedge piece, and the guide rail surface is sandwiched earlier than the wedge piece contacts the guide rail in conjunction with an operating mechanism that operates in an emergency. An elevator emergency stop device comprising a rail pinching device in which a frictional force generated at that time acts in a direction in which the wedge piece is lifted relative to the lifting body along the guide rail. . 2. The emergency stop device for an elevator according to claim 1, wherein the rail pinching device includes means for sliding and wiping the surface of the guide rail when the guide rail is pinched in an emergency. 2. The emergency stop device for an elevator according to claim 1, wherein the rail pinching device includes means for slidingly wiping the surface of the guide rail when the lifting body moving up and down along the guide rail moves up and down. The rail surface wiping means includes means for setting to operate when the lifting body is raised or lowered, and means for operating according to a lifting speed of the lifting body. Item 3. Elevator emergency stop device according to item 3 The emergency stop device for an elevator according to any one of claims 2 to 4, wherein the rail surface wiping means includes means for collecting and accumulating oil or dust wiped from the guide rail surface.

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