WO2022038665A1 - Elevator device - Google Patents

Abstract

Disclosed is an elevator device in which the reliability of an operation by an electric manipulator is improved without a complicated operation mechanism for operating an emergency stop device. This elevator device comprises an electric manipulator that is provided in an elevator car and that operates an emergency stop device, wherein: the electric manipulator comprises an electromagnet (35), a manipulation lever (11) that manipulates the emergency stop device (2) in conjunction with an operation of the electromagnet, an armature (34) that is connected to the manipulator lever, a feed screw (36) that screws into a screw hole part provided to the electromagnet, and a motor (37) that drives the feed screw; the armature is attracted by the electromagnet in a standby state; the armature becomes attached to the excited electromagnet after the emergency stop device is operated; the electromagnet having the armature attached thereto is moved to a standby state position by the feed screw which is driven by the motor; and the distance between a first roller (39) and the feed screw is kept constant when the armature is moved together with the electromagnet.

Description

Elevator equipment

The present invention relates to an elevator device including an emergency stop device operated by an electric actuator.

The elevator device is equipped with a governor and an emergency stop device in order to constantly monitor the ascending / descending speed of the car and to make an emergency stop of the car that has fallen into a predetermined overspeed state. Generally, the car and the governor are connected by a governor rope, and when an overspeed condition is detected, the governor restrains the governor rope to operate the emergency stop device on the car side, and the car is stopped in an emergency. There is.

In such an elevator device, it is difficult to save space and cost because a long governor rope is laid in the hoistway. Further, when the governor rope swings, the structure in the hoistway and the governor rope tend to interfere with each other.

On the other hand, an emergency stop device that does not use a governor rope has been proposed.

The technique described in Patent Document 1 is known as a conventional technique relating to an emergency stop device that does not use a governor rope. In the present prior art, brake units having wedge-shaped brake shoes are provided at two places in the lower part of the car, and brake links are connected to the brake shoes. The two brake links are connected to each other by a connecting portion, and in conjunction with each other, the brake shoes are moved up and down to apply the brake and release the brake.

On one side of the brake unit, a lock part is provided to lock the operation of the brake link so that the brake is not applied, and to release the lock when applying the brake. When the solenoid provided in the lock unit is activated by a command from the control unit, the mechanism interlocking with the solenoid instantly moves the brake link upward by the elastic energy of the released spring. As a result, the brake shoe is pulled upward and the car is braked.

The other brake unit side is provided with a return unit that returns the emergency stop device to the normal state. The linear actuator provided in the return unit is driven, and the torsion spring is urged by a mechanism interlocked with the linear actuator. In this state, when the car is pulled up a little by a command from the control unit, the brake shoe is disengaged from the guide rail and pulled down by the link mechanism that receives the urging force of the torsion spring.

Japanese Unexamined Patent Publication No. 2013-189283

As described above, in the conventional emergency stop device operated by the electric actuator, the configuration of the operation mechanism becomes complicated.

Therefore, the present invention provides an elevator device provided with an emergency stop device that can suppress the complexity of the operation mechanism while being operated by the electric actuator and can improve the reliability of the operation.

In order to solve the above problems, the elevator device according to the present invention includes a car, an emergency stop device provided in the car, and an electric controller provided in the car to operate the emergency stop device. The electric motor includes an electromagnet, an operation lever that operates the emergency stop device in conjunction with the operation of the electromagnet, an amateur connected to the operation lever, and a feed screw that is screwed into the screw hole portion of the electromagnet. In the standby state, the amateur is attracted by the electromagnet, and after the emergency stop device is activated, the amateur is attracted to the excited electromagnet, and the electromagnet that attracts the amateur is the motor. Driven by the lead screw, it is moved to its standby position and the distance between the first roller and the lead screw is kept constant as the amateur moves with the electromagnet.

According to the present invention, the reliability of the operation of the electric actuator can be improved without complicating the operation mechanism for operating the emergency stop device.

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

It is a schematic block diagram of the elevator apparatus which is Example 1. FIG. It is a front view which shows the mechanical part of the electric actuator in Example 1. FIG. It is a main part block diagram which shows the operation of the electric manipulator in Example 1 (the state of the electric manipulator at the time of standby and after operation). It is a main part block diagram which shows the operation of the electric actuator in Example 1 (the state of the electric actuator during return). It is a side view which shows the structure of the electric actuator in Example 1. FIG. It is a top view which shows the structure of the electric actuator in Example 1. FIG. It is a main part block diagram which shows the operation of the electric manipulator in Example 2 (state of the electric manipulator at the time of standby and after operation). It is a main part block diagram which shows the operation of the electric actuator in Example 2 (the state of the electric actuator during return). It is a side view which shows the structure of the electric actuator in Example 2. FIG.

Hereinafter, the elevator device according to the embodiment of the present invention will be described with reference to Examples 1 and 2 with reference to the drawings. In each figure, those having the same reference number indicate the same constituent requirements or the constituent requirements having similar functions.

FIG. 1 is a schematic configuration diagram of an elevator device according to a first embodiment of the present invention.

As shown in FIG. 1, the elevator device includes a car 1, a position sensor 3, an electric controller 10, a drive mechanism (12 to 20), a pull-up rod 21, and an emergency stop device 2. ..

The 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. When the main rope is frictionally driven by a drive device (winding machine: not shown), the car 1 moves up and down in the hoistway.

The position sensor 3 is provided in the car 1, detects the position of the car 1 in the hoistway, and constantly detects the ascending / descending speed of the car 1 from the detected position of the car 1. Therefore, the position sensor 3 can detect that the ascending / descending speed of the car exceeds a predetermined overspeed.

In the first embodiment, the position sensor 3 includes an image sensor, and detects the position and speed of the car 1 based on the image information of the surface state of the guide rail 4 acquired by the image sensor. For example, the position of the car 1 is detected by collating the image information of the surface state of the guide rail 4 measured in advance and stored in the storage device with the image information earned by the image sensor.

As the position sensor, a rotary encoder provided in the car and rotating with the movement of the car may be used.

The electric actuator 10 is an electromagnetic actuator in the first embodiment, and is arranged on the upper part of the car 1. The electromagnetic actuator includes, for example, a movable piece or a movable rod operated by a solenoid or an electromagnet. The electric actuator 10 operates when the position sensor 3 detects a predetermined overspeed state of the car 1. At this time, the pulling rod 21 is pulled up by the drive mechanism (12 to 20) connected to the operating lever 11. As a result, the emergency stop device 2 is put into a braking state.

The drive mechanism (12 to 20) will be described later.

The emergency stop device 2 is arranged one on each side of the car 1. A pair of brakes (not shown) provided in each emergency stop device 2 is movable between the braking position and the non-braking position, sandwiches the guide rail 4 at the braking position, and further rises relatively by lowering the car 1. Then, a braking force is generated by the frictional force acting between the brake element and the guide rail 4. As a result, the emergency stop device 2 operates when the car 1 falls into an overspeed state, and causes the car 1 to make an emergency stop.

The elevator device of the first embodiment includes a so-called low press governor system that does not use a governor rope, and the ascending / descending speed of the car 1 exceeds the rated speed and is the first overspeed (for example, 1.3 of the rated speed). When the speed reaches not more than double), the power supply of the drive device (winding machine) and the power supply of the control device that controls this drive device are cut off. Further, when the descending speed of the car 1 reaches the second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the electric controller 10 provided in the car 1 is electrically driven, and it is extremely difficult. The stop device 2 is activated, and the car 1 is stopped in an emergency.

In the first embodiment, the low press governor system includes the above-mentioned position sensor 3 and a safety control device that determines an overspeed state of the car 1 based on the output signal of the position sensor 3. This safety control device measures the speed of the car 1 based on the output signal of the position sensor 3, and when it is determined that the measured speed has reached the first overspeed, the power supply of the drive device (winding machine) and A command signal for shutting off the power supply of the control device that controls this drive device is output. Further, when the safety control device determines that the measured speed has reached the second overspeed, the safety control device outputs a command signal for operating the electric controller 10.

As described above, when the pair of brakes provided in the emergency stop device 2 is pulled up by the pulling rod 21, the pair of brakes sandwich the guide rail 4. The pulling rod 21 is driven by a drive mechanism (12 to 20) connected to the electric actuator 10.

The configuration of this drive mechanism will be described below.

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 actuating piece 16 form a T-shaped head and foot, respectively. The substantially T-shaped first link member is rotatable to a crosshead (“50” in FIG. 1) via the first operating shaft 19 at the connecting portion between the operating lever 11 and the first operating piece 16. Is supported by. The end of the pulling rod of one of the pair of pulling rods 21 (left side in the figure) at the end of the working piece 16 which is the T-shaped foot on the opposite side of the connecting portion between the operating lever 11 and the working piece 16. Is 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 working piece 18 form a T-shaped head and foot, respectively. The substantially T-shaped second link member is rotatably supported by the crosshead via the second operating shaft 20 at the connecting portion between the connecting piece 17 and the second operating piece 18. The other of the pair of pulling rods 21 (on the right side in the figure) at the end of the second operating piece 18 which is the T-shaped foot, opposite to the connecting portion of the connecting piece 17 and the second operating piece 18. The end of the pulling rod is connected.

The end of the operating lever 11 extending from the inside of the housing 30 to the outside and the end of both ends of the connecting piece 17 closer to the upper part of the car 1 than the second operating shaft 20 are the car, respectively. 1 It is connected to one end (left side in the figure) and the other end (right side in the figure) of the drive shaft 12 lying on it. The drive shaft 12 slidably penetrates the fixing portion 14 fixed to the crosshead. Further, the drive shaft 12 penetrates the pressing member 15, and the pressing member is fixed to the drive shaft 12. The pressing member 15 is located on the side of the second link member (connecting piece 17, second operating piece 18) of the fixing portion 14. A drive spring 13 (compression spring), which is an elastic body, is located 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 is activated, that is, when the energization of the electromagnet is cut off in the first embodiment, the electromagnetic force that restrains the movement of the operating lever 11 against the urging force of the drive spring 13 disappears, so that the pressing force is applied. The drive shaft 12 is driven along the longitudinal direction by the urging force of the drive spring 13 applied to the member 15. Therefore, the first link member (operation lever 11, the first operating piece 16) rotates around the first operating shaft 19, and the second link member (connecting piece 17, the second operating piece 18). Rotates around the second actuating shaft 20. As a result, one pulling rod 21 connected to the first working piece 16 of the first link member is driven and pulled up, and the other pulling rod connected to the second working piece 18 of the second link member is driven. 21 is driven and pulled up.

FIG. 2 shows the mechanical portion of the electric actuator 10 in the first embodiment, and is a front view in the installed state of FIG. In FIG. 2, the emergency stop device is in the non-operating state, and the electric actuator 10 is in the standby state. That is, the elevator device is in a normal operating state.

As shown in FIG. 2, in the standby state, the amateur 34 connected to the operation lever 11 is attracted to the electromagnet 35 being excited. As a result, the movement of the operating lever 11 is restrained against the urging force of the drive spring 13 (FIG. 1). At least the portion of the amateur 34 that adsorbs to the electromagnet 35 is made of a magnetic material, preferably a soft magnetic material.

The operation lever 11 is rotatably connected to the operation lever connection portion 33 of the amateur bracket 38 provided on the amateur 34. The operating lever 11 has an elongated hole 60 extending along the longitudinal direction of the operating lever at an end connected to the operating lever connecting portion 33. The operating lever 11 is slidably connected to the operating lever connecting portion 33 via a roller 39 penetrating the elongated hole 60.

When the excitation of the electromagnet 35 is stopped by a command from a safety control device (not shown), the attractive force acting on the amateur 34 disappears. As a result, the electromagnetic restraint of the amateur 34 is released, so that the drive shaft 12 is driven by the urging force of the drive spring 13 (FIG. 1). Here, the amateur 34 is not mechanically connected to the return mechanism unit (36,37,41,42) described later, and is mechanically connected to the return mechanism unit (36,37,41,42). It is in a free state.

When the drive shaft 12 is driven, the operation lever 11 connected to the drive shaft 12 rotates around the first operating shaft 19 and interlocks with the first operating piece 16 connected to the operating lever 11. Rotates around the first actuating shaft 19. As a result, the pulling rod 21 connected to the first actuating piece 16 is pulled up. When the pulling rod 21 is pulled up, a pair of wedge-shaped brakes 22 included in the emergency stop device 2 are pulled up. The emergency stop device 2 in the first embodiment is based on a known technique.

When the operation lever 11 rotates as described above, the amateur 34 connected to the operation lever 11 moves along the rotation direction of the operation lever 11. Therefore, in order to return the electric actuator to the standby state, as described below, the return mechanism unit (36, 37, 41, 42) provided in the electric actuator allows the amateur 34 to move from the moving position to the standby state. Return to position (see Figure 3).

The electric actuator has a feed screw 36 located on a flat surface portion of a substrate or a pedestal (not shown) for driving the amateur 34. The lead screw 36 is rotatably supported by a first support member 41 and a second support member 42 fixed on a flat surface of a substrate or a pedestal (not shown). The electromagnet 35 includes a screw hole member having a screw hole, and this screw hole member is screwed with the feed screw 36. The lead screw 36 is rotated by a motor 37.

The rotation of the motor 37 is converted into the linear movement of the electromagnet 35 along the axial direction of the feed screw 36 by the rotating feed screw and the screw hole member included in the electromagnet 35. As a result, as will be described later (FIG. 3), if the electromagnet 35 is moved to attract the amateur 34 to the electromagnet 35 and then the electromagnet 35 is moved, the amateur 34 can be moved.

3 and 4 are configuration diagrams of main parts showing the operation of the electric actuator in the first embodiment. FIG. 3 shows the state of the electric actuator during standby and after operation. Further, FIG. 4 shows the state of the electric actuator during the return to the standby state.

As described above, when the excitation of the electromagnet 35 is stopped by a command from a safety control device (not shown), the operating lever 11 is rotated around the first operating shaft 19 as shown in FIG. Rotate around. The actuating piece 16 also rotates around the first actuating shaft 19 clockwise in the figure, that is, in the direction of pulling up the brake (“22” in FIG. 2).

As the operation lever 11 rotates, the amateur 34 moves from the standby position (solid line) to the post-operation position (broken line). At this time, the amateur 34 moves in a state where the roller 39 is in contact with the lower end portion of the elongated hole 60 due to the weight of the amateur 34. Further, since the amateur 34 is not attracted to the electromagnet 35 and is mechanically free from the return mechanism portion (36, 37, 41, 42), the return mechanism portion, particularly the feed screw 36, is in a state of being mechanically free. No load is applied. As a result, the amateur 34 moves smoothly. Further, it is prevented that stress is generated in the return mechanism portion due to the movement of the amateur 34. Therefore, the reliability of the operation of the electric actuator is improved.

Note that FIG. 3 also shows the standby position (solid line) and the post-operation position (dashed line) of the operation lever 11 and the operating piece 16. The electromagnet 35 remains in the standby position until the motor 37 starts rotating for the return operation.

Since the amateur 34 is attracted to the electromagnet 35 during standby, the suction surface of the amateur 34 and the suction surface of the electromagnet 35 are parallel to each other. Further, in FIG. 3, even after the operation, the suction surface of the amateur 34 (broken line) at the position after the operation and the suction surface of the electromagnet 35 staying at the standby position are parallel to each other.

Here, the amateur 34 may rotate around the roller 39 due to its own weight when moving from the standby position to the post-operation position. In this case, after the operation, the suction surface of the amateur 34 and the suction surface of the electromagnet 35 that stays in the standby position are not parallel to each other. However, when the electromagnet 35 moves by the return mechanism and attracts the amateur 34, the amateur 34 rotates around the roller 39 by the electromagnetic force, so that the suction surface of the amateur 34 and the suction surface of the electromagnet 35 are in standby mode. It will be parallel as well. That is, the state of the amateur 34 is the state (broken line) shown in FIG.

When the motor 37 rotates, the electromagnet 35 moves linearly toward the amateur 34 by the lead screw 36. When the electromagnet 35 moves to the position of the amateur 34 after the operation, the electromagnet 35 attracts the amateur 34 by an electromagnetic force. When the motor 37 reverses after the electromagnet 35 attracts the amateur 34, the lead screw 36 moves the electromagnet 35 to the standby position while attracting the amateur 34. As a result, the amateur 34 moves to the standby position. In the first embodiment, the excitation of the electromagnet 35 is restarted with the start of rotation of the motor 37, but the excitation is not limited to this, and the excitation is restarted immediately before or immediately after the electromagnet 35 reaches the position after the operation of the amateur 34. You may.

As described above, the amateur 34 moves from the standby position to the post-operation position with the roller 39 in contact with the lower end of the elongated hole 60. Therefore, as shown in FIG. 3, the roller 39 moves after the operation. 39 is in contact with the lower end of the elongated hole 60. Further, in the first embodiment, as shown in FIG. 3, the roller 39 is in contact with the lower end portion of the elongated hole 60 even during standby. Further, during the return operation, the lower end portion of the elongated hole 60 moves below the roller 39 (see FIG. 4).

Therefore, the height of the roller 39 from the installation plane of the first support member 41 and the second support member 42 is maintained at the same height h during the return operation. At this time, since the longitudinal direction of the lead screw 36, that is, the direction of the axis of rotation is parallel to the installation planes of the first and second support members 41 and 42, the distance between the lead screw 36 and the roller 39 is kept constant. Therefore, the roller of the comparative example (the operation lever having no elongated hole 60) is pushed down (see FIG. 4), whereas the roller 39 of the first embodiment is pushed up or down by the operation lever 11. do not do. Therefore, during the return operation, the return mechanism portion, particularly the feed screw 36, is prevented from being loaded by the operation lever 11 and the amateur 34 via the electromagnet 35 that attracts the amateur 34.

During standby, the lower end of the elongated hole 60 may be located below the roller 39. Similarly, in this case as well, it is possible to prevent the return mechanism from being loaded during the return operation.

When the lower end of the elongated hole 60 is in contact with the roller 39 even during standby as in the first embodiment, when the amateur 34 moves by its own weight immediately after the electromagnet 35 is stopped at the standby position. The impact when the roller 39 comes into contact with the edge of the lower end of the elongated hole 60 is reduced. Further, since the moving stroke of the amateur 34 at the time of return can be increased, the elastic energy stored in the drive spring 13 (FIG. 1) can be increased.

Since the operating lever 11 is slidably connected to the roller 39 of the amateur 34 by the elongated hole 60, as shown in FIG. 4, during the return operation of the electric controller 10, the lower end portion of the elongated hole 60 is formed. It is located below the roller 39. Therefore, as shown in FIG. 4, when the amateur 34 is located between the operating position and the standby position during the return, the roller 39 is located between the upper end and the lower end of the elongated hole 60. .. That is, the roller 39 is separated from the edges of the upper and lower ends of the elongated holes 60 without touching them. Therefore, it is prevented that the operating lever 11 and the amateur 34, which are mechanically connected, are loaded on the return mechanism portion, particularly the feed screw 36, via the electromagnet 35 that attracts the amateur 34.

As a result, the amateur 34 moves smoothly during the return operation of the electric actuator. Further, it is prevented that stress is generated in the return mechanism portion due to the movement of the amateur 34. Therefore, the reliability of the operation of the electric actuator is improved.

In the first embodiment, the edge of the elongated hole 60 has a semicircular shape at both ends and a straight line between both ends. The radius of this semicircle is substantially equal to the radius of the roller 39. The radius of the semicircle is set so that the operating lever 11 is slidably connected to the roller 39 by the elongated hole 60. Therefore, in the first embodiment, the height of the lower end portion of the elongated hole 60 is set to the height of the center of the semicircular edge of the lower end portion of the elongated hole 60.

Here, the distance between the center of the semicircle at the upper end of the elongated hole 60 and the center of the semicircle at the lower end of the elongated hole 60 is defined as the length L of the elongated hole 60. Further, as shown in FIG. 4, when the longitudinal direction of the operating lever 11 and the longitudinal direction of the lead screw 36 are perpendicular to each other, the distance between the center of the semicircle at the lower end of the elongated hole 60 and the center of the roller 39 is set to L. Let it be ₂ . In the first embodiment, the distance between the center of the semicircle and the center of the roller 39 at the lower end of the elongated hole 60 changes during the return operation, but L ₂ is a maximum value. In the first embodiment, there is a relationship of L ≧ L ₂ between L and L ₂ . As a result, it is surely prevented from applying a load to the return mechanism portion at all points during the return.

Further, as shown in FIG. 4, the distance between the rotation axis of the feed screw 36 and the center of the semicircle at the lower end of the elongated hole 60 when the longitudinal direction of the operation lever 11 and the longitudinal direction of the feed screw 36 are perpendicular to each other. If l ₁ and the distance between the rotation axis of the lead screw 36 and the center of the roller 39 is l ₂ , then L ₂ = l ₂ -l ₁ , so there is a relationship of L ≧ l ₂ -l ₁ .

Since the amateur 34 is attracted to the electromagnet 35 during the return operation, the distance between the rotation axis of the feed screw 36 and the center of the roller 39 does not change (l ₂ ). Further, since the operating lever 11 rotates around the first operating shaft 19, the distance between the rotating shaft of the feed screw 36 and the center of the semicircle at the lower end of the elongated hole 60 changes, as shown in FIG. When the longitudinal direction of the operating lever 11 and the longitudinal direction of the lead screw 36 are perpendicular to _each other, the minimum value is l1.

Next, the details of the configuration of the first embodiment will be described with reference to FIGS. 5 and 6.

FIG. 5 is a side view showing the configuration of the electric actuator in the first embodiment. Further, FIG. 6 is a plan view showing the configuration of the electric actuator in the first embodiment.

Note that FIG. 5 shows the configuration when the electric actuator is viewed in the A direction in FIG. Further, FIG. 6 shows that the two circular amateurs 34 and the two circular electromagnets 35, which show the configuration when the electric controller is viewed from above in FIG. 4, are operated to the left and right of the operation lever 11. It is arranged line-symmetrically with the lever 11 as the axis of symmetry. The diameter of the amateur 34 is larger than the diameter of the electromagnet 35, and the circular plane of the electromagnet 35 and the circular plane of the amateur 34 are arranged so that the circular edge of the amateur 34 and the circular edge of the electromagnet 35 are concentric circles. .. Therefore, since the entire circular plane of the electromagnet 35 overlaps with the circular plane of the amateur 34, the amateur 34 is surely attracted by the electromagnet 35.

The two electromagnets 35 are fixed to both ends in the longitudinal direction of the rectangular screw hole member 70 having the screw hole 71, and are connected to each other by the screw hole member 70. The screw hole 71 is located at the center of the screw hole member 70 in the longitudinal direction and is screwed with the feed screw 36. The two amateurs 34 are arranged apart from each other in the longitudinal direction of the screw hole member 70 without touching each other. Further, the two amateurs 34 are arranged apart from the lead screw 36 without being in contact with the lead screw 36. Similarly, the two electromagnets 35 are also arranged apart from each other and separated from the feed screw 36.

The operation lever connection portion 33 in the amateur bracket 38 that supports the amateur 34 projects upward from the circular surface of the amateur 34, further bends at a right angle toward the operation lever 11, and the end portion in contact with the operation lever 11 is at a right angle upward. It bends to. The two operating lever connecting portions 33 are arranged line-symmetrically with the operating lever 11 as the axis of symmetry. The operating lever 11 is located between the two operating lever connecting portions 33. The roller 39 is fixedly fitted to the ends of the two operating lever connecting portions 33, and penetrates the elongated hole 60 of the operating lever 11 located between the two operating lever connecting portions 33.

As shown in FIGS. 5 and 6, the amateur 34 is not mechanically connected to the return mechanism portion including the lead screw 36, the motor 37, and the first and second support portions 41 and 42. Therefore, when the amateur 34 is not attracted to the electromagnet, it is mechanically free from the return mechanism portion as described above.

As described above, according to the first embodiment, the reliability of the operation of the electric actuator can be improved without complicating the operation mechanism of the electric actuator.

Next, the elevator device according to the second embodiment of the present invention will be mainly described as different from the first embodiment.

As described below, the second embodiment has a different configuration of the electric actuator from the first embodiment.

7 and 8 are configuration diagrams of main parts showing the operation of the electric actuator in the second embodiment. FIG. 7 shows the state of the electric actuator during standby and after operation. Further, FIG. 8 shows the state of the electric actuator during the return to the standby state.

In the second embodiment, unlike the first embodiment, the operating lever 11 is connected to the operating lever connecting portion 33 in the amateur 34 via the joint portion 61.

The end portion of the operation lever 11 on the amateur 34 side and one end portion of the joint portion 61 are connected via the roller 62. Therefore, the joint portion 61 is rotatably connected to the operating lever 11 around the roller 62. Further, the other end of the joint portion 61 and the operation lever connecting portion 33 in the amateur 34 are connected via the roller 63. Therefore, the joint portion 61 is rotatably connected to the operation lever connecting portion 33 around the roller 63.

When the excitation of the electromagnet 35 is stopped by a command from a safety control device (not shown), the operating lever 11 rotates clockwise around the first operating shaft 19 as shown in FIG. 7. The actuating piece 16 also rotates around the first actuating shaft 19 clockwise in the figure, that is, in the direction of pulling up the brake (“22” in FIG. 2).

As the operation lever 11 rotates, the amateur 34 moves from the standby position (solid line) to the post-operation position (broken line). At this time, due to the weight of the amateur 34, the joint portion 61 moves in a state of being extended in the vertical direction. Further, since the amateur 34 is not attracted to the electromagnet 35 and is mechanically free from the return mechanism portion (36, 37, 41, 42), the return mechanism portion, particularly the feed screw 36, is in a state of being mechanically free. No load is applied. As a result, the amateur 34 moves smoothly. Further, it is prevented that stress is generated in the return mechanism portion due to the movement of the amateur 34. Therefore, the reliability of the operation of the electric actuator is improved.

Note that FIG. 7 also shows the standby position (solid line) and the post-operation position (dashed line) of the operation lever 11 and the operating piece 16. The electromagnet 35 remains in the standby position until the motor 37 starts rotating for the return operation.

Since the amateur 34 is attracted to the electromagnet 35 during standby, the suction surface of the amateur 34 and the suction surface of the electromagnet 35 are parallel to each other. Further, in FIG. 7, even after the operation, the suction surface of the amateur 34 (broken line) at the position after the operation and the suction surface of the electromagnet 35 staying at the standby position are parallel to each other.

Here, the amateur 34 may rotate around the roller 63 due to its own weight when moving from the standby position to the post-operation position. In this case, after the operation, the suction surface of the amateur 34 and the suction surface of the electromagnet 35 that stays in the standby position are not parallel to each other. However, when the electromagnet 35 moves by the return mechanism and attracts the amateur 34, the amateur 34 rotates around the roller 63 by the electromagnetic force, so that the suction surface of the amateur 34 and the suction surface of the electromagnet 35 are in standby mode. It will be parallel as well. That is, the state of the amateur 34 is the state (broken line) shown in FIG.

When the motor 37 rotates, the electromagnet 35 moves linearly toward the amateur 34 by the lead screw 36. When the electromagnet 35 moves to the position of the amateur 34 after the operation, the electromagnet 35 attracts the amateur 34 by an electromagnetic force. When the motor 37 reverses after the electromagnet 35 attracts the amateur 34, the lead screw 36 moves the electromagnet 35 to the standby position while attracting the amateur 34. As a result, the amateur 34 moves to the standby position.

As described above, the amateur 34 moves from the standby position to the post-operation position in a state where the longitudinal direction of the joint portion 61 extends in the vertical direction. Therefore, as shown in FIG. 7, the joint portion 61 moves after the operation. The longitudinal direction of the portion 61 extends in the vertical direction. Further, in the second embodiment, as shown in FIG. 7, the longitudinal direction of the joint portion 61 is extended in the vertical direction even during standby. Further, since the joint portion 61 rotates around the rollers 62 and 63 during the return operation, the angle formed by the longitudinal direction of the operating lever 11 and the longitudinal direction of the joint portion 61 changes according to the movement of the amateur 34. (See Fig. 8).

Therefore, the height of the roller 63 from the installation plane of the first support member 41 and the second support member 42 is maintained at the same height h during the return operation. At this time, since the longitudinal direction of the lead screw 36, that is, the direction of the axis of rotation is parallel to the installation planes of the first and second support members 41 and 42, the distance between the lead screw 36 and the roller 63 is kept constant. Therefore, as shown in FIG. 8, the roller of the comparative example (the operation lever having no joint portion 61) is pushed down, whereas the roller 63 of the second embodiment is pushed up or down by the operation lever 11. I don't do it. Therefore, during the return operation, the return mechanism portion, particularly the feed screw 36, is prevented from being loaded by the operation lever 11 and the amateur 34 via the electromagnet 35 that attracts the amateur 34.

During standby, the longitudinal direction of the joint portion 61 does not extend in the vertical direction, and as shown in FIG. 8, the longitudinal direction and the vertical direction of the joint portion 61 may form an angle (> 0 degree). Similarly, in this case as well, it is possible to prevent the return mechanism from being loaded during the return operation.

In addition, as in the second embodiment, when the longitudinal direction of the joint portion 61 is extended in the vertical direction even in the standby state, the amateur 34 immediately after the electromagnet 35 is stopped to excite at the standby position. When the joint portion 61 rotates around the roller 62 due to its own weight, the runout of the amateur 34 is reduced. Further, since the moving stroke of the amateur 34 at the time of return can be increased, the elastic energy stored in the drive spring 13 (FIG. 1) can be increased.

In the second embodiment, since the operating lever 11 rotates around the first operating shaft 19 during the returning operation of the electric controller 10, the height of the roller 62 changes, but it corresponds to the movement of the amateur 34. Therefore, the angle formed by the longitudinal direction of the operating lever 11 and the longitudinal direction of the joint portion 61 changes, so to speak, the change in the height of the roller 62 is absorbed by this angle change. Therefore, as shown in FIG. 8, the height of the roller 63 is kept constant (“h” in FIG. 7) when the amateur 34 is positioned between the operating position and the standby position during the return. Dripping. Therefore, the operating lever 11 and the amateur 34, which are mechanically connected, are prevented from applying a load to the return mechanism portion, particularly the feed screw 36, via the electromagnet 35 that attracts the amateur 34.

As a result, the amateur 34 moves smoothly during the return operation of the electric actuator. Further, it is prevented that stress is generated in the return mechanism portion due to the movement of the amateur 34. Therefore, the reliability of the operation of the electric actuator is improved.

Here, the distance between the center of the roller 62 and the roller 63 is defined as the length L of the joint portion 61. Further, assuming that the maximum value of the distance between the rotation axis of the lead screw 36 and the center of the roller 62 during the return operation is l ₂ , and the distance between the rotation axis of the lead screw 36 and the center of the roller 63 is l ₁ , L There is a relationship of ≧ l ₂ − l ₁ . As a result, it is surely prevented from applying a load to the return mechanism portion at all points during the return.

Since the amateur 34 is attracted to the electromagnet 35 during the return operation, the distance between the rotation axis of the feed screw 36 and the center of the roller 63 does not change (l ₁ ). Further, since the operating lever 11 rotates around the first operating shaft 19, the distance from the center of the roller 63 changes, and as shown in FIG. 7, the longitudinal direction of the operating lever 11 and the longitudinal direction of the feed screw 36 When and becomes vertical, the maximum value is l ₂ . Further, as shown in FIG. 7, when the direction of the rotation axis of the lead screw 36 and the longitudinal direction of the joint portion 61 are perpendicular to each other, L is the shortest. Therefore, if L ≧ l ₂ −l ₁ , the change in the height of the roller 62 is absorbed by the change in the angle formed by the longitudinal direction of the operating lever 11 and the longitudinal direction of the joint portion 61 during the return operation.

Next, the details of the configuration of the second embodiment will be described with reference to FIG. The points different from those of the first embodiment (FIG. 5) will be described.

FIG. 9 is a side view showing the configuration of the electric actuator in the second embodiment. Note that FIG. 9 shows the configuration when the electric actuator is viewed in the B direction in FIG.

The thickness of one end of the operating lever 11 is smaller in the central portion in the thickness direction of the operating lever 11 than the portion following the one end. Further, one end of the joint portion 61 is provided with a groove penetrating in the depth direction (width direction of the operation lever 11 and the joint portion 61) in the drawing at the center portion in the thickness direction of the joint portion 61. The roller 62 penetrates one end of the operation lever 11 and one end of the joint 61 in a state where one end of the operation lever 11 and one end of the joint 61 are fitted to each other.

The roller 63 is fixedly fitted to the ends of the two operating lever connecting portions 33, and penetrates the other end of the joint portion 61 located between the two operating lever connecting portions 33.

Note that, in FIG. 8, among the configurations when the electric actuator is viewed in the B direction, the configurations other than the above are the same as those in the first embodiment (FIG. 5).

Further, in FIG. 8, the configuration when the electric actuator is viewed from above is the same as that of the first embodiment (FIG. 6).

As described above, according to the second embodiment, the reliability of the operation of the electric actuator can be improved without complicating the operation mechanism of the electric actuator, as in the first embodiment.

The present invention is not limited to the above-described embodiment, but includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to add / delete / replace a part of the configuration of the embodiment with another configuration.

For example, the electric actuator 10 may be provided in the lower portion or the side portion in addition to the upper portion of the car 1.

1 ... Cargo, 2 ... Emergency stop device, 3 ... Position sensor, 4 ... Guide rail, 10 ... Electric controller, 11 ... Operation lever, 12 ... Drive shaft, 13 ... Drive spring, 14 ... Fixed part, 15 ... Press Member, 16 ... 1st working piece, 17 ... connecting piece, 18 ... second working piece, 19 ... first working shaft, 20 ... second working shaft, 21 ... pulling rod, 22 ... braker, 30 ... Housing, 33 ... Operation lever connection, 34 ... Amateur, 35 ... Electromagnet, 36 ... Feed screw, 37 ... Motor, 38 ... Amateur bracket, 39 ... Roller, 41 ... First support member, 42 ... Second Support member, 50 ... Cross head, 60 ... Long hole, 61 ... Joint part, 62 ... Roller, 63 ... Roller, 70 ... Screw hole member, 71 ... Screw hole

Claims (10)

Riding basket,
The emergency stop device provided in the car and
An electric actuator provided in the car and operating the emergency stop device,
In an elevator device equipped with
The electric actuator is
With an electromagnet
An operation lever that operates the emergency stop device in conjunction with the operation of the electromagnet,
An amateur connected to the operating lever via a first roller,
A feed screw that is screwed into the screw hole portion of the electromagnet,
The motor that drives the lead screw and
Equipped with
In the standby state, the amateur is attracted by the electromagnet.
After the emergency stop device is activated,
The amateur is attracted to the excited electromagnet and
The electromagnet that has attracted the amateur is moved to the position in the standby state by the feed screw driven by the motor, and the electromagnet is moved to the position in the standby state.
An elevator device characterized in that the distance between the first roller and the lead screw is kept constant when the amateur moves together with the electromagnet. In the elevator device according to claim 1,
An elevator device comprising a mechanism portion that keeps a constant distance between the first roller and the feed screw when the amateur is moved by the lead screw. In the elevator device according to claim 2,
The mechanism unit is an elevator device provided in the operation lever and having an elongated hole through which the first roller penetrates. In the elevator device according to claim 3,
The elevator device is characterized in that the operating lever is connected to an amateur connection portion in a bracket that supports the amateur via the first roller. In the elevator device according to claim 4,
The length of the elongated hole is L, the minimum value of the distance between the feed screw and the lower end of the elongated hole when the amateur is moved by the feed screw is l ₁ , and the feed screw and the first first are used. An elevator device characterized in that L ≧ l ₂ − l ₁ where the distance from the roller is 1 ₂ . In the elevator device according to claim 5,
The operating lever is an elevator device characterized in that it can rotate around an operating shaft. In the elevator device according to claim 2,
The mechanism portion is an elevator device, which is a joint portion connected to the operation lever via a second roller and connected to the amateur via the first roller. In the elevator device according to claim 7.
The elevator device is characterized in that the joint portion is connected to an amateur connection portion in a bracket that supports the amateur via the first roller. In the elevator device according to claim 8,
The length of the joint portion is L, the distance between the feed screw and the first roller when the amateur is moved by the feed screw is l ₁ , and the distance between the feed screw and the second roller. An elevator device characterized in that L ≧ l ₂ − l ₁ where the maximum value of is 1 ₂ . In the elevator device according to claim 9.
The operating lever is an elevator device characterized in that it can rotate around an operating shaft.

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