WO2022224351A1

WO2022224351A1 - Elevator apparatus

Info

Publication number: WO2022224351A1
Application number: PCT/JP2021/016048
Authority: WO
Inventors: 康司伊藤; 秀隆座間; 洋輔久保
Original assignee: 株式会社日立製作所
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-10-27
Also published as: CN117177932A; JP7505119B2; EP4328166A1; JPWO2022224351A1

Abstract

Disclosed is an elevator apparatus that comprises an emergency stopping device that operates by an electric actuator, and that can reduce the load applied to the motor. This elevator apparatus includes an elevator car, an emergency stopping device, drive mechanisms (12-19) that drive the emergency stopping device, and an electric actuator (10) that causes the drive mechanisms to operate. The electric actuator comprises: an operating lever (11) connected to the drive mechanisms; movable members (34A, 34B) pivotably connected to the operating lever; an electromagnet part (35) that attracts the movable members in a stand-by state of the electric actuator; a feed screw (36) that screws into the electromagnet part; a motor (37) that drives the feed screw; and a guide part (201) that, in a return operation of the electric actuator and when the electromagnet part moves toward the movable members and contacts the electric actuator as the feed screw is driven by the motor, causes the movable members to follow the movement of the electromagnet part so as to position the movable members with respect to the electromagnet part.

Description

elevator equipment

The present invention relates to an elevator system equipped with a safety device operated by an electric actuator.

The elevator system is equipped with a governor and an emergency stop device to constantly monitor the ascending and descending speed of the car and to emergency stop the car that has fallen into a predetermined overspeed condition. In general, the car and the governor are connected by a governor rope, and when an overspeed condition is detected, the governor restrains the governor rope and activates the emergency stop device on the car side to bring the car to an emergency stop. there is

In such an elevator system, it is difficult to save space and reduce costs because a long governor rope is laid in the hoistway. In addition, when the governor rope swings, the structures in the hoistway and the governor rope tend to interfere with each other.

In response, an emergency stop device that does not use a governor rope has been proposed.

The technology described in Patent Document 1 is known as a conventional technology related to a safety device that does not use a governor rope.

In this prior art, a drive shaft that drives the safety device and an operating mechanism that operates the drive shaft are provided on the car. The operating mechanism includes a movable iron core mechanically connected to the drive shaft via a connecting piece, and an electromagnetic core that attracts the movable iron core. The drive shaft is urged by the drive spring, but normally the movement of the drive shaft is restrained by the operating mechanism because the electromagnet is energized and the movable iron core is attracted.

In the event of an emergency, the electromagnetic core is demagnetized and the restraint on the drive shaft is released, and the drive shaft is driven by the biasing force of the drive spring. As a result, the safety device operates to bring the car to an emergency stop.

Also, when returning the safety device to its normal state, the electromagnetic core is moved to approach the movable iron core that was moved in an emergency. A mechanism for moving the electromagnetic core includes a feed screw, a motor for rotating the feed screw, and a feed nut provided on the electromagnetic core and screwed with the feed screw. As the motor rotates, the lead screw and lead nut move the electromagnetic core. When the electromagnetic core contacts the movable core, the electromagnetic core is energized to attract the movable core to the electromagnetic core. Further, the electromagnetic core is driven while the movable iron core is attracted to the electromagnetic core, and the movable iron core and the electromagnetic core are returned to the normal standby position.

WO2020/110437

In the conventional technology described above, the mechanical load applied to the motor increases when the safety device returns due to assembly tolerances and dimensional tolerances of the operating mechanism. Therefore, if the output of the motor is increased, the size of the motor and power consumption will increase.

Therefore, the present invention provides an elevator apparatus equipped with a safety device operated by an electric actuator capable of reducing the load on the motor.

In order to solve the above problems, an elevator apparatus according to the present invention includes a car, a safety device provided in the car, a drive mechanism provided in the car for driving the safety device, and a safety device provided in the car. and an electric actuator for operating the drive mechanism, the electric actuator comprising: an operation lever connected to the drive mechanism; a movable member rotatably connected to the operation lever; In the standby state of , the electromagnet that attracts the movable member, the feed screw that is screwed into the electromagnet, the motor that drives the feed screw, and the motor that drives the feed screw in the return operation of the electric actuator, a guide portion for following movement of the movable member so as to align the movable member with respect to the electromagnet portion when the electromagnet portion moves toward and contacts the movable member. .

According to the present invention, the load applied to the motor can be reduced during the return operation of the electric actuator.

Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a schematic configuration diagram of an elevator apparatus that is Embodiment 1. FIG. Fig. 2 is a front view showing the mechanical portion of the electric actuator in Example 1 (standby state); Fig. 2 is a front view showing the mechanical portion of the electric actuator in Example 1 (in an operating state); FIG. 3 is a side view showing arrangement of a movable member, an electromagnet portion, a guide portion, and a feed screw in FIG. 2; 4 is a top view showing the mechanical portion of the electric actuator in Example 1 (operating state); FIG. 4 is a top view showing the mechanical portion of the electric actuator in Example 1 (during return operation); FIG. 4 is a top view showing the mechanism of the electric actuator in Example 1 (standby state); FIG. FIG. 10 is a front view showing the mechanical portion of the electric actuator in Example 2 (standby state); FIG. 11 is a front view showing the mechanical portion of the electric actuator in Example 2 (in an operating state); FIG. 9 is a side view showing arrangement of a movable member, an electromagnet portion, a guide portion and a feed screw in FIG. 8; FIG. 11 is a top view showing the mechanical portion of the electric actuator in Example 2 (operating state); FIG. 11 is a top view showing the mechanical portion of the electric actuator in Example 2 (during return operation); FIG. 11 is a top view showing the mechanical portion of the electric actuator in Example 2 (standby state);

Hereinafter, an elevator apparatus that is one embodiment of the present invention will be described with reference to Examples 1 and 2 with reference to the drawings. In each figure, the same reference numbers denote the same components or components with similar functions.

FIG. 1 is a schematic configuration diagram of an elevator apparatus that is Embodiment 1 of the present invention.

As shown in FIG. 1, the elevator system includes a car 1, an electric actuator 10, a drive mechanism (12-20), a lifting rod 21, and a safety device 2.

A car 1 is suspended by a main rope (not shown) in a hoistway provided in a building, and is slidably engaged with a guide rail 4 via a guide device (not shown). . When the main rope is friction-driven by a driving device (hoisting machine: not shown), the car 1 ascends and descends in the hoistway.

A speed detection device (not shown) is provided in the car 1 and constantly detects the ascending/descending speed of the car 1 in the hoistway. Therefore, the speed detector can detect that the elevator car 1 has exceeded a predetermined overspeed.

In the first embodiment, the speed detection device is provided with an image sensor, and detects the speed of the car 1 based on the image information of the surface condition of the guide rail 4 acquired by the image sensor. For example, the speed detection device calculates the speed from the moving distance of the image feature amount in a predetermined time.

Note that the speed detection device may calculate the speed of the car based on the output signal of a rotary encoder that rotates as the car moves.

The electric actuator 10 is an electromagnetic operator in the first embodiment, and is arranged above the car 1 . The electromagnetic operator has, for example, a movable piece or a movable rod that is operated by a solenoid or electromagnet section. The electric actuator 10 is activated when the speed detector detects a predetermined overspeed condition of the car 1 . At this time, the drive mechanism (12-20) connected to the operating lever 11 pulls up the pull-up rod 21. As shown in FIG. As a result, the safety device 2 is brought into a braking state.

The drive mechanisms (12-20) will be described later.

The safety devices 2 are arranged one by one on the left and right sides of the car 1. A pair of brakes (not shown) included in each safety device 2 are movable between a braking position and a non-braking position, sandwich the guide rail 4 at the braking position, and rise relatively as the car 1 descends. Then, a braking force is generated by the frictional force acting between the brake shoe and the guide rail 4 . As a result, the safety device 2 is actuated when the car 1 is in an overspeed condition to bring the car 1 to an emergency stop.

The elevator system of the present embodiment 1 is provided with a so-called ropeless governor system that does not use a governor rope. speed not more than doubled), power to the drive (hoisting machine) and to the control device controlling this drive is cut off. Further, when the descending speed of the car 1 reaches a second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the electric actuator 10 provided in the car 1 operates the safety device 2. Then, the car 1 is brought to an emergency stop.

In the present embodiment 1, the ropeless governor system is composed of the aforementioned speed detection device and a safety control device that determines the overspeed state of the car 1 based on the output signal of the speed detection device. This safety control device measures the speed of the car 1 based on the output signal of the speed detection device, and when it is determined that the measured speed has reached the first overspeed, the power supply of the drive device (hoisting machine) and It outputs a command signal for shutting off the power supply of the control device that controls this drive device. Further, when the safety control device determines that the measured speed has reached the second overspeed, it outputs a command signal for operating the electric actuator 10 .

As described above, when the pair of brakes included in the safety device 2 are pulled up by the lifting rod 21, the pair of brakes sandwich the guide rail 4. The lifting rod 21 is driven by a drive mechanism (12-20) connected to the electric actuator 10. As shown in FIG.

The configuration of this drive mechanism will be described below. The configuration of the electric actuator 10 will be described later (FIGS. 2 to 4).

The operating lever 11 of the electric actuator 10 and the first operating piece 16 are connected to form a substantially T-shaped first link member. The operating lever 11 and the first operating piece 16 constitute a T-shaped head and foot, respectively. A substantially T-shaped first link member is rotatably supported by a crosshead 50 as a support member via a first operating shaft 19 at a connecting portion between the operating lever 11 and the first operating piece 16 . be. One of the pair of lifting rods 21 (left side in the figure) is attached to the end of the first operating piece 16 which is the foot of the T-shape, opposite to the connecting portion between the operating lever 11 and the first operating piece 16 . The ends are connected.

The connecting piece 17 and the second operating piece 18 are connected to form a substantially T-shaped second link member. The connecting piece 17 and the second operating piece 18 constitute a T-shaped head and foot, respectively. The substantially T-shaped second link member is rotatably supported by the crosshead 50 via the second operating shaft 20 at the connecting portion between the connecting piece 17 and the second operating piece 18 . At the end of the second operating piece 18, which is the leg of the T-shape, opposite to the connecting portion between the connecting piece 17 and the second operating piece 18, the other of the pair of lifting rods 21 (left side in the figure) is attached. The ends are connected.

The end of the operating lever 11 extending from the inside of the housing 30 to the outside and the end of the connecting piece 17 nearer to the upper part of the car 1 than the second operating shaft 20 are connected to the car. 1 are connected to one end (left side in the figure) and the other end (right side in the figure) of a drive shaft 12 lying on the upper side.

The drive shaft 12 slidably penetrates a fixing portion 14 (fixing bolts not shown) fixed to the crosshead 50 by bolting. Further, the drive shaft 12 passes through the pressing member 15 , and the pressing member 15 is fixed to the drive shaft 12 . The pressing member 15 is positioned on the second link member (connecting piece 17, second operating piece 18) side of the fixed portion 14. As shown in FIG. An elastic drive spring 13 is positioned between the fixed portion 14 and the pressing member 15 , and the drive shaft 12 is inserted through the drive spring 13 .

When the electric actuator 10 operates, that is, when the electromagnet section is deenergized in the first embodiment, the electromagnetic force that restrains the movement of the operating lever 11 against the biasing force of the drive spring 13 disappears. The biasing force of the drive spring 13 applied to the pressing member 15 drives the drive shaft 12 along the longitudinal direction. Therefore, the first link member (operating lever 11, first operating piece 16) rotates around the first operating shaft 19, and the second link member (connecting piece 17, second operating piece 18) rotates. rotates about the second actuation axis 20 . As a result, one lifting rod 21 connected to the first operating piece 16 of the first link member is driven and lifted, and the other lifting rod connected to the second operating piece 18 of the second link member is pulled up. 21 is driven and pulled up.

It should be noted that, in the first embodiment, a flexible cover member 32 through which the operation lever is inserted is provided at the insertion portion of the operation lever 11 in the housing cover 31 which is the upper surface of the housing 30 . This prevents dust, foreign matter, and the like from entering the housing 30 in which the mechanical portion of the electric actuator 10 is housed.

FIG. 2 is a front view showing the mechanical part housed in the housing 30 of the electric actuator 10 according to the first embodiment, in the installation state of FIG. In FIG. 2, the safety device is in a non-operating state, and the electric actuator 10 is in a standby state. That is, the elevator installation is in normal operating condition.

As shown in FIG. 2, in the standby state, the movable members (34A, 34B) connected to the operating lever 11 are attracted to the electromagnet section 35 that is excited. As a result, the movement of the operating lever 11 is restrained against the biasing force of the drive spring 13 (compression spring).

The movable member has an attraction portion 34A that is attracted to the magnetic pole surface of the electromagnet portion 35, and a support portion 34B to which the attraction portion 34A is fixed. The operating lever 11 is connected to the support portion 34B via a bracket 38 that is rotatably connected to the support portion 34B. Moreover, in the movable member, at least the attracting portion 34A is made of a magnetic material.

The support portion 34B is connected to the bracket 38 by an engagement pin 102. A shaft portion 101 of the engaging pin 102 passes through a long hole 103 in the support portion 34B, and the end portion of the shaft portion 101 is fixed to the bracket 38 . The longitudinal direction of the long hole 103 is parallel to the adsorption surface of the adsorption portion 34A. Also, the width of the long hole 103 in the direction perpendicular to the longitudinal direction of the long hole 103 is larger than the diameter of the shaft portion 101 of the engaging pin 102 and smaller than the diameter of the head portion of the engaging pin 102 .

Due to such long holes 103, there is a degree of freedom in the position of the engaging pin 102 in the support portion 34B. Therefore, the movable members (34A, 34B) are engaged when the operating lever 11 rotates and the height of the engaging pin 102 from the substrate 40 changes, as in the return operation of the electric actuator, which will be described later. The stress received from the dowel pin 102 can be relaxed.

The electromagnet part 35 has a guide part 201 . The guide portion 201 is fitted with the suction portion 34A of the movable member. Thereby, the movable member is positioned with respect to the electromagnet portion 35 .

A positional deviation of the movable member may occur during the emergency stop operation of the electric actuator 10 . Even if the displacement occurs, when the guide portion 201 of the electromagnet portion 35 and the attracting portion 34A are fitted together in the return operation of the electric actuator 10, the movable member that is displaced is guided by the guide portion 201. The movement brings it into alignment with the electromagnet portion 35 .

The other mechanism parts (36, 37, 40-42) in FIG. 2 will be described later (FIG. 3).

In the first embodiment, a flexible cover member 32 that covers the opening through which the operation lever 11 is inserted is provided in the housing cover 31 that is the upper surface of the housing 30 . For example, the cover member 32 is made of a thin plate-like rubber material. Since the cover member 32 has flexibility, the movement of the operating lever 11 when operating the safety device is not hindered.

The cover member 32 prevents dust, foreign matter, etc. from entering the housing 30 and adhering to or coming into contact with the mechanism. This improves the reliability of the operation of the electric actuator 10 in the installation environment (in a hoistway, etc.).

FIG. 3 is a front view showing the mechanical part housed in the housing 30 of the electric actuator 10 according to the first embodiment, in the installation state of FIG. In FIG. 3, the safety device is in a braking state, and the electric actuator 10 is in an operating state. That is, the elevator system is in a state of being stopped by the safety device.

When the excitation of the electromagnet portion 35 is stopped by a command from a safety control device (not shown), the attractive force acting on the movable members (34A, 34B) disappears. 12 is driven. When the drive shaft 12 is driven, the operating lever 11 connected to the drive shaft 12 rotates around the first operating shaft 19, interlocking with the first operating piece 16 connected to the operating lever 11. rotates about the first actuation shaft 19 . Thereby, the pulling rod 21 connected to the first operating piece 16 is pulled up.

When the operating lever 11 rotates as described above, the movable member connected to the operating lever 11 moves along the rotating direction of the operating lever 11 . In order to return the electric actuator 10 to the standby state shown in FIG. It returns from the moving position (FIG. 3) to the standby position (FIG. 2).

As shown in FIG. 3, the electric actuator 10 has a lead screw 36 located on the flat surface of the substrate 40 for driving the movable member. The feed screw 36 is rotatably supported by a first support member 41 and a second support member 42 fixed on the plane of the substrate 40 . The electromagnet part 35 has a feed nut 39 , and the feed nut 39 is screwed with the feed screw 36 . A feed screw 36 is rotated by a motor 37 .

In order to return the electric actuator 10 to the standby state, first, the motor 37 is driven to rotate the feed screw 36 . Rotation of the motor 37 is converted into linear movement of the electromagnet section 35 along the axial direction of the feed screw 36 by the rotating feed screw 36 and the feed nut 39 provided in the electromagnet section 35 .

When the electromagnet part 35 approaches the moving position of the movable member (34A, 34B), the guide part 201 is fitted with the attracting part 34A of the movable member. As a result, while the movable member is aligned with the electromagnet portion 35, the attraction portion 34A and the magnetic pole surface of the electromagnet portion 35 come into surface contact. When such contact between the movable member and the electromagnet portion 35 is detected by a switch (not shown) or the load current of the motor 37, the electromagnet portion 35 is excited and the motor 37 is stopped. The movable member is attracted to the electromagnet portion 35 by the action of electromagnetic force.

When the movable member is attracted to the electromagnet part 35, the direction of rotation of the motor 37 is reversed while the excitation of the electromagnet part 35 is continued, and the feed screw 36 is reversed. As a result, the movable member moves together with the electromagnet portion 35 to the standby position. At this time, since the movable member is aligned with the electromagnet portion 35 , the movable member moves smoothly without increasing the load on the motor 37 .

FIG. 4 is a side view showing the arrangement of the movable members (34A, 34B), electromagnet section 35, guide section 201 and feed screw 36 in FIG. 4 is a side view of FIG. 2 as seen from the right direction in the figure.

As shown in FIG. 4 , the suction portion 34A of the movable member has a line-symmetrical planar shape with an axis of symmetry passing through the central axis of the feed screw 36 . Also, the electromagnet part 35 has two circular magnetic pole faces. These pole faces are arranged symmetrically about the same axis of symmetry.

The adsorption part 34A has a notch part 34C in the central part. The notch portion 34C and the guide portion 201 are fitted. The guide portion 201 has a hollow cylindrical shape, and the feed screw 36 passes through the inside of the guide portion 201 . The open end portion of the guide portion 201 on the side of the movable member has a tapered surface that decreases in diameter toward the suction portion 34A of the movable member. Note that this tapered surface is visible in FIG.

Even if the position of the movable member is displaced during the emergency stop operation, when the guide portion 201 and the notch portion 34C are fitted together in the return operation of the electric actuator 10, the movable member side of the guide portion 201 is first A tapered surface at the open end contacts the edge of the notch 34C to move the movable member. That is, the displaced movable member moves while being guided by the guide portion 201 . Further, when the guide portion 201 and the notch portion 34C are fitted up to the maximum diameter portion of the tapered surface, that is, the cylindrical portion following the tapered surface, the movable member is set by the guide portion 201 with respect to the electromagnet portion 35. position.

The width (w) of the notch portion 34C in the horizontal direction in FIG. It is set larger than (d) (d<w≦d+Δx). In the first embodiment, when the guide portion 201 and the notch portion 34C are fitted together, the upper edge of the notch portion 34C is pushed up by the tapered surface of the guide portion 201, thereby increasing the height of the movable member. Alignment can also be achieved for directional misalignment.

As shown in FIG. 4, the support portion 34B of the movable member has two engagement portions with the bracket 38. These two engaging portions are arranged line-symmetrically with respect to the axis of symmetry of the suction portion 34A described above. At each of the two engaging portions, the movable member is connected to the bracket 38 via an engaging pin 102 through which the shaft portion 101 is fixedly connected to the side portion of the bracket 38 through an elongated hole 103. be.

FIG. 4 shows the movable member aligned, but in this state, the side of bracket 38 and the side of support 34B that face each other are positioned so that they do not contact each other. The dimensions and the positional relationship between the two are set. Therefore, there is a gap (play) between the side portion of the bracket 38 and the side portion of the support portion 34B. Further, as described above, in order to allow the degree of freedom in the position of the engaging pin 102 within the range of the elongated hole 103, the end portion of the shaft portion 101 of the engaging pin 102 on the head side of the engaging pin 102 is , on the side opposite to the bracket 38 side of the support portion 34B, and protrudes from the elongated hole 103 to form a free end.

Therefore, the movable members (34A, 34B) are rotatable around the engagement pin 102 and movable in the axial direction of the engagement pin 102, that is, the rotation axis direction. As a result, the movable members (34A, 34B) can be misaligned in the axial direction of the engagement pin 102, and the movable members (34A, 34B) can be aligned as described later.

Next, the return operation of the electric actuator 10 will be explained using FIGS.

5 to 7 are top views showing the mechanical portion of the electric actuator according to the first embodiment.

　The electric actuator is in the operating state (corresponding to Fig. 3), during the return operation, and in the standby state (corresponding to Fig. 2) in Figs. 5, 6 and 7, respectively.

In FIG. 5, the movable members (34A, 34B) are misaligned in the axial direction of the engagement pin. That is, the center of the notch portion 34C (horizontal center in FIG. 4) is shifted upward in FIG. 5 (to the right in FIG. 4) from the rotation axis of the feed screw 36. Therefore, when the support portion 34B of the movable member approaches the bracket 38 due to positional deviation, the support portion 34B and the bracket 38 may come into contact with each other due to dimensional tolerances and assembly tolerances of the electric actuator.

When the support portion 34B and the bracket 38 come into contact with each other, the load on the motor 37 increases during the return operation. Therefore, in order to ensure the reliability of the return operation, the motor 37 is required to have an output value that takes into account the increased load due to the contact between the support portion 34B and the bracket 38. FIG.

In contrast, in the first embodiment, as will be described below, the movable member is positioned with respect to the electromagnet portion 35 during the return operation, so that the support portion 34B and the bracket 38 come into contact with each other and the motor load is reduced. can be prevented from increasing.

As shown in FIG. 6, during the return operation of the electric actuator, the electromagnet portion 35 is driven by the feed screw 36 rotated by the motor 37, and the electromagnet portion 35 moves toward the movable member. When the electromagnet portion 35 approaches the movable member, the tip portion of the guide portion 201 having a tapered surface is fitted into the notch portion 34C of the adsorption portion 34A. At this time, the edge of the notch portion 34C is pressed by the tapered surface, so that the movable member moves in the axial direction of the engagement pin 102. As shown in FIG. In the first embodiment, the movable member moves downward in FIG. 5 from the position in FIG.

When the electromagnet portion 35 moves further and the guide portion 201 and the notch portion 34C are fitted to the maximum diameter portion of the tapered surface, that is, the cylindrical portion following the tapered surface as shown in FIG. Movement ceases and the movable member is aligned with respect to the electromagnet portion 35 in the position set by the guide portion 201 .

That is, when the electromagnet part 35 approaches the displaced movable member, the movable member is guided by the guide part 201 provided in the electromagnet part 35 and moves in the direction opposite to the displaced direction. Thereby, the movable member is aligned with the position set by the guide portion 201 with respect to the electromagnet portion 35 .

Such alignment eliminates the possibility of contact between the support portion 34B and the bracket 38 due to dimensional tolerances and assembly tolerances of the electric actuator when the movable member is misaligned.

When the movable member is aligned with the electromagnet part 35, the electromagnet part 35 is energized and attracts the attracting part 34A by electromagnetic force. While the electromagnet part 35 is energized, the motor 37 is rotated in a direction opposite to the direction in which the electromagnet part 35 is moved toward the movable member. The electromagnet 35 is driven by the feed screw 36 rotated by the motor 37 rotating in the reverse direction, and the electromagnet 35 and the movable members (34A, 34B) move to the standby state position as shown in FIG. At this time, the electromagnet part 35 and the movable members ( 34 A, 34 B) move while the movable member is aligned with the electromagnet part 35 . Therefore, it is possible to prevent an increase in motor load due to dimensional tolerances and assembly tolerances of the electric actuator.

When the electromagnet part 35 and the movable members (34A, 34B) move to the positions in the standby state, the motor 37 stops and the electromagnet part 35 is kept energized. As a result, the electric actuator enters a standby state as shown in FIG.

As described above, according to the first embodiment, the moving direction of the movable members (34A, 34B), which are displaced when the electric actuator is actuated, is adjusted by the guide portion 201 when the electric actuator is restored. Positioning is performed with respect to the electromagnet part 35 by moving while guiding in the direction opposite to the direction of positional deviation. That is, the movable member is provided with the electromagnet portion such that, in the return operation, the electromagnet portion 35 aligns the movable member with respect to the electromagnet portion 35 when the electromagnet portion 35 moves toward and contacts the movable member. The movement of the electromagnet part 35 is followed by the guide part 201 .

In addition, the electric actuator according to the first embodiment operates in the same manner even when the power supply to the electromagnet part 35 is stopped due to a power failure, when the power failure is restored.

As a result, it is possible to prevent an increase in the motor load when moving the electromagnet part 35 to the position in the standby state, which is caused by dimensional tolerances and assembly tolerances of the electric actuator. Therefore, the output capacity of the motor 37 can be reduced.

　Next, an elevator apparatus that is a second embodiment of the present invention will be described with reference to Figs.

The schematic configuration of the elevator apparatus of the second embodiment is the same as that of the first embodiment (Fig. 1).

The points that differ from the first embodiment will be mainly described below.

FIG. 8 shows the mechanical part housed in the housing 30 of the electric actuator 10 in Embodiment 2, and is a front view in the installation state of FIG. 1 (corresponding to FIG. 2 described above). In FIG. 8, the safety device is in a non-operating state, and the electric actuator 10 is in a standby state. That is, the elevator installation is in normal operating condition.

As shown in FIG. 8, in the second embodiment, unlike the first embodiment, the suction portion 34A of the movable member (34A, 34B) has a guide portion 301. As shown in FIG. As will be described later (FIG. 10), the guide portions 301 are provided on both the left and right sides of the attracting surface of the attracting portion 34A with the electromagnet portion 35 . Between these guide portions 301, the electromagnet portion 35 is fitted with the adsorption portion 34A of the movable member. Thereby, the movable member is positioned with respect to the electromagnet portion 35 .

As will be described later, when the tapered surface of the guide portion 301 is pressed by the electromagnet portion 35, the misaligned movable member is moved and aligned. Therefore, the alignment mechanism is the same as in the first embodiment, although the movable member has the guide portion 301 . Thus, also in the second embodiment, the movable member is aligned with the electromagnet section 35 by moving while being guided by the guide section 301 .

FIG. 9 shows the mechanical part housed in the housing 30 of the electric actuator 10 in the second embodiment, and is a front view in the installation state of FIG. 1 (corresponding to FIG. 3 described above). In FIG. 9, the safety device is in the braking state, and the electric actuator 10 is in the operating state. That is, the elevator system is in a state of being stopped by the safety device.

When the electromagnet part 35 approaches the movable members (34A, 34B) from the position shown in FIG. It fits with the portion 34A. Thereby, the movable member is positioned with respect to the electromagnet portion 35 . Therefore, when the movable member moves to the standby position together with the electromagnet portion 35 that attracts the movable member, the movable member smoothly moves without increasing the load on the motor 37 .

FIG. 10 is a side view showing the arrangement of the movable members (34A, 34B), electromagnet section 35, guide section 301 and feed screw 36 in FIG. 10 is a side view of FIG. 8 as seen from the right direction in the figure.

As in the first embodiment, the suction portion 34A has a notch portion 34C in the central portion of the suction surface. The feed screw 36 passes through the central portion of the notch portion 34C. The width of the notch 34C in the horizontal direction in the drawing is set so that the edge of the notch 34C does not come into contact with the feed screw 36 in anticipation of the positional displacement of the movable member.

As shown in FIG. 10, the adsorption section 34A has guide sections 301 at both left and right ends in the horizontal direction in the drawing. The two guide portions have tapered surfaces that open toward the electromagnet portion 35, as shown in FIGS. 11 to 13 described later. Note that these tapered surfaces are visible in FIG.

Even if the movable member is displaced during the emergency stop operation, when the attracting portion 34A and the electromagnet portion 35 are fitted between the two guide portions 301 in the return operation of the electric actuator 10, first, the guide The end portion of the magnetic pole surface of the electromagnet portion 35 contacts the tapered surface of the portion 301 . As a result, the tapered surface is pressed against the end of the pole surface, moving the movable member. That is, the displaced movable member moves while being guided by the guide portion 301 . When the electromagnet part 35 moves further and the magnetic pole surface of the electromagnet part 35 comes into surface contact with the attracting surface between the guide parts 301 , the movable member is aligned with the position set by the electromagnet part 35 .

It should be noted that the width (W) of the suction surface between the guide portions 301 in the horizontal direction in FIG. It is set larger than the distance (D) between the ends of the two magnetic pole faces (D<W≤D+ΔX).

Next, the return operation of the electric actuator 10 will be described with reference to FIGS. 11-13.

11 to 13 are top views showing the mechanical portion of the electric actuator according to the first embodiment.

　The electric actuator is in the operating state (corresponding to Fig. 9), during the return operation, and in the standby state (corresponding to Fig. 8) in Figs. 11, 12 and 13, respectively.

As shown in FIGS. 11 to 13, the suction section 34A of the movable member has guide sections 301 on both sides of the notch section 34C. The guide portions 301 are provided at both end portions of the attracting surface of the attracting portion 34</b>A facing parallel to the magnetic pole surface of the electromagnet portion 35 . Guide portion 301 has a tapered surface. Each tapered surface is formed of an inclined surface that extends outward from the end of the attracting surface and approaches the magnetic pole surface of the electromagnet portion 35 . Therefore, the two tapered surfaces at both ends of the attracting surface are open toward the electromagnet section 35 . Between such tapered surfaces, the movable member is aligned as described below by fitting the electromagnet portion 35 with the movable member.

It should be noted that in the second embodiment, the guide portion 301 is configured by a member different from the suction portion 34A. It should be noted that the guide portion 301 may be configured by bending both ends of the plate material that configures the adsorption portion 34A into a tapered shape. Also, the guide portion 301 may be made of a non-magnetic material. In this case, when the electromagnet portion 35 is energized, the magnetic pole surface of the electromagnet and the attracting surface of the attracting portion 34A are attracted with high reliability.

In FIG. 11, the movable members (34A, 34B) are displaced in the axial direction of the engagement pin 102. In FIG. That is, the center of the notch portion 34C (horizontal center in FIG. 10) is shifted upward in FIG. 11 (to the right in FIG. 10) from the rotation axis of the feed screw 36 . Therefore, when the support portion 34B of the movable member approaches the bracket 38 due to positional deviation, the support portion 34B and the bracket 38 may come into contact with each other due to dimensional tolerances and assembly tolerances of the electric actuator.

In contrast, in the second embodiment, as will be described below, the movable member is positioned with respect to the electromagnet portion 35 during the return operation, so that the support portion 34B and the bracket 38 come into contact with each other and the motor load is reduced. can be prevented from increasing.

As shown in FIG. 12, during the return operation of the electric actuator, the electromagnet part 35 is driven by the feed screw 36 rotated by the motor 37, and the electromagnet part 35 moves toward the movable member. When the electromagnet part 35 approaches the movable member, the electromagnet part 35 is fitted between the guide parts 301 of the adsorption part 34A. At this time, since the tapered surface of the guide portion 301 is pressed by the end of the magnetic pole surface of the electromagnet portion 35 , the movable member moves in the axial direction of the engagement pin 102 . In the second embodiment, the movable member moves downward in FIG. 11 from the position in FIG.

When the electromagnet part 35 moves further and the attraction surface between the guide parts 301 of the attraction part 34A and the magnetic pole surface of the electromagnet part 35 come into surface contact as shown in FIG. 12, the movement of the movable member stops. At this time, the movable member is aligned with the electromagnet section 35 at the position set by the electromagnet section 35 .

That is, when the electromagnet part 35 approaches the displaced movable member, the movable member is guided by the guide part 301 of the movable member and moves in the direction opposite to the displaced direction. Thereby, the movable member is aligned with the position set by the electromagnet section 35 .

As described above, according to the second embodiment, the moving direction of the movable members (34A, 34B), which are displaced when the electric actuator is actuated, is changed by the guide portion 301 when the electric actuator is restored. Positioning is performed with respect to the electromagnet part 35 by moving while guiding in the direction opposite to the direction of positional deviation. That is, the movable member is provided with a movable member such that, in the return movement, the movable member aligns the movable member with respect to the electromagnet portion 35 when the electromagnet portion 35 moves toward and contacts the movable member. The movement of the electromagnet part 35 is followed by the guide part 301 .

In addition, the electric actuator in the second embodiment similarly operates at the time of power failure recovery even when the power supply to the electromagnet part 35 is stopped due to power failure.

It should be noted that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Moreover, it is possible to add, delete, or replace a part of the configuration of the embodiment with another configuration.

For example, the electric actuator 10 may be provided not only on the upper part of the car 1, but also on the lower part or the side part.

In addition, the elevator device may be equipped with a machine room, or may be a so-called machine room-less elevator.

DESCRIPTION OF SYMBOLS 1... Car, 2... Emergency stop device, 3... Position sensor, 4... Guide rail, 10... Electric actuator, 11... Operation lever, 12... Drive shaft, 13... Drive spring, 14... Fixed part, 15... Pressure Member 16 Operating piece 17 Connecting piece 18 Operating piece 19 Operating shaft 20 Operating shaft 21 Lifting rod 30 Case 31 Case cover 32 Cover member 33 Plate-like member

34A Adsorption portion

34B Support portion

34C Notch portion 35 Electromagnet portion 36 Feed screw 37 Motor 38 Bracket 39 Feed nut 40 Substrate 41 Support Member 42 Supporting member 50 Cross head 101 Shaft 102 Engagement pin 103 Long hole 201 Guide part 301 Guide part

Claims

car and
a safety device provided in the car;
a drive mechanism provided in the car for driving the safety device;
an electric actuator provided in the car for operating the drive mechanism;
In an elevator installation comprising
The electric actuator is
an operating lever connected to the drive mechanism;
a movable member rotatably connected to the operating lever;
an electromagnet part that attracts the movable member in a standby state of the electric actuator;
a feed screw screwed into the electromagnet;
a motor that drives the feed screw;
In the return operation of the electric actuator, by driving the feed screw by the motor, the electromagnet portion moves toward the movable member and contacts the movable member. a guide portion for following the movement of the electromagnet portion so as to align the movable member with the portion;
An elevator system comprising:
The elevator installation of claim 1, wherein
An elevator apparatus according to claim 1, wherein a gap is provided between the movable member and a connecting portion of the operating lever to the movable member.
An elevator installation according to claim 2, wherein
An elevator apparatus, wherein the movable member is movable along a rotation axis.
The elevator installation of claim 1, wherein
An elevator apparatus, wherein the electromagnet section includes the guide section.
In the elevator installation according to claim 4,
The elevator apparatus according to claim 1, wherein the guide portion is fitted with the movable member.
In the elevator installation according to claim 5,
The guide portion has a tapered surface,
1. An elevator apparatus according to claim 1, wherein when said guide portion is fitted with said movable member, said tapered surface presses said guide portion so that said movable member follows.
The elevator installation of claim 1, wherein
The movable member includes the guide section,
The elevator apparatus, wherein the guide section has a first guide section and a second guide section facing the electromagnet section.
An elevator installation according to claim 7, wherein
The elevator apparatus according to claim 1, wherein the electromagnet portion is fitted with the movable member between the first guide portion and the second guide portion.
An elevator installation according to claim 8, wherein
The guide portion has a tapered surface,
1. An elevator apparatus according to claim 1, wherein said movable member is driven by said tapered surface being pressed by said electromagnet portion when said electromagnet portion is engaged with said movable member.