JP6678814B2 - Elevator equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an elevator apparatus having an emergency stop device mounted on a car.

  Generally, an emergency operation of an elevator apparatus is divided into two stages. As an operation of the first stage, when an excessive speed of the car exceeding the rated speed is mechanically detected by the governor, the safety switch is operated, the power to the hoist is cut off, and the hoist brake is released. Operate. Further, when the speed of the car is further increased even when the hoist machine brake is operated, the emergency stop device mounted on the car is operated as a second stage operation.

  The emergency stop device performs an emergency stop of the car by gripping the car guide rail using a wedge. In many safety devices, raising the car causes the wedge to separate from the car guide rails and release the gripping force.

  On the other hand, in the conventional shock absorbing device of an elevator, a large striking occurs at the end of the main rope in an emergency, and when a load acting on the end of the main rope reaches a certain value, the upper surface of the shock absorbing material is raised. The lower surface of the frame contacts. From this state, when the load acting on the terminal portion of the main rope further increases, the shackle spring and the shock absorbing material are both compressed, and the shock is absorbed (for example, see Patent Document 1).

  Further, in a conventional rope tensioning device for an elevator, a plurality of hydraulic cylinders are fixed to a suspension plate. Each rope is connected to a piston in a corresponding hydraulic cylinder via a socket member, a connecting member, and a piston rod. The hydraulic cylinders are connected by a pipe (for example, see Patent Document 2).

JP 2006-131339 A JP-A-5-39181

  In the conventional elevator apparatus as described above, as a test method for confirming the soundness of the safety gear, the car is lowered at an excessive speed in a state where the hoist brake is not operated, and the safety gear is actually operated. There is a way to check if the car can be stopped.

  In such a test method, when the car stops, the counterweight connected to the car via the main rope may jump due to inertial force. In this case, the counterweight falls freely after jumping up. Then, at the stage where the main rope is fully extended, the upward inertial force acts on the car, the car slightly rises, and the gripping force of the safety device on the car guide rail is released.

  At this time, since the hoist machine brake is not operated, when the car descends again and reaches the excessive speed again, the safety gear operates. If such an operation is repeated, it is difficult to confirm whether the safety device is normal.

  In addition, when an emergency stop is also installed on the counterweight, the emergency stop device on the counterweight side also operates at the time of free fall after the counterweight jumps up, and the emergency stop device on both the car and the counterweight is activated. It is possible that it will work.

  On the other hand, the conventional devices shown in Patent Documents 1 and 2 do not consider the jumping of the counterweight at the time of testing the emergency stop device as described above. The activated safety device may be released by free fall after the counterweight jumps up.

  The present invention has been made to solve the above-described problem, and prevents the gripping force of the activated safety device from being released by a free fall after the second elevating body jumps up. It is an object of the present invention to obtain an elevator apparatus which can perform the following.

  An elevator apparatus according to the present invention includes a hoist having a drive sheave, a suspension wound around the drive sheave, a first elevating body suspended by the suspension at one side of the drive sheave, and a drive sheave. The second elevating body suspended by the suspension body on the other side is mounted on the first elevating body, and when the descending speed of the first elevating body reaches an excessive speed, the first elevating body is moved. An emergency stop device for performing an emergency stop, and provided between the suspension body and the second lifting / lowering body, and when the emergency stop device operates and the first lifting / lowering body stops emergency, the second lifting / lowering body It has an energy consuming device that consumes the energy of free fall after jumping up.

  In the elevator apparatus according to the present invention, since the energy consuming device that consumes the energy of free fall after the second elevating body is lifted is provided between the suspension body and the second elevating body, the second elevating mechanism is provided. It is possible to prevent the gripping force of the activated safety device from being released by the free fall after the bouncing of the body.

1 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. It is a side view which shows the energy consuming device of FIG. FIG. 3 is a side view showing a state where the first and second suction members of FIG. 2 are separated from each other. It is a side view which shows the counterweight and the energy consuming device of FIG. FIG. 5 is a side view showing a state where the first and second suction members of FIG. 4 are separated from each other. It is a side view which shows the principal part of the elevator apparatus by Embodiment 2 of this invention. FIG. 7 is a side view showing a state where the second friction fastening member of FIG. 6 is shifted downward with respect to the first friction fastening member.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided above a hoistway 1. A car 3 as a first elevator and a counterweight 4 as a second elevator are provided in the hoistway 1.

  In the hoistway 1, a pair (only one is shown in FIG. 1) of the car guide rails 5 that guide the elevation of the car 3 and a pair (only one is shown in FIG. 1) that guides the elevation of the counterweight 4. And a counterweight guide rail 6 are provided.

  The car 3 has a car frame 7 and a car room 8 supported by the car frame 7. The car frame 7 has a pair of car frame columns 7a (only one is shown in FIG. 1) and a car upper beam 7b. The car frame pillars 7 a are arranged on both sides in the width direction of the car room 8. The car upper beam 7b is horizontally disposed between the upper ends of the car frame pillars 7a.

  An emergency stop device 9 is mounted below the car 3. The emergency stop device 9 emergency-stops the car 3 by gripping the pair of car guide rails 5. The safety device 9 has a wedge guide and a wedge member (both are not shown). The wedge member is pushed between the wedge guide and the car guide rail 5 when the safety device 9 is operated. When the car 3 is raised in a state where the safety gear 9 is operated, the wedge member is separated from the car guide rail 5 and the gripping force of the safety gear 9 is released.

  The machine room 2 is provided with a hoisting machine 10 for raising and lowering the car 3 and the counterweight 4. The hoist 10 includes a drive sheave 11, a hoist motor (not shown) for rotating the drive sheave 11, and a hoist brake 12 for braking the rotation of the drive sheave 11. As the hoisting machine brake 12, an electromagnetic brake is used.

  A suspension 13 is wound around the drive sheave 11. A plurality of ropes or a plurality of belts are used as the suspension 13. The first end of the suspension 13 is connected to the car upper beam 7b. The second end of the suspension 13 is connected to the upper part of the counterweight 4 via the energy consuming device 21.

  The car 3 is suspended by a suspension 13 on one side of the drive sheave 11. The counterweight 4 is suspended by a suspension 13 on the other side of the drive sheave 11. The car 3 and the counterweight 4 are suspended in the hoistway 1 by a suspension 13 in a 1: 1 roping method. The car 3 and the counterweight 4 move up and down in the hoistway 1 by rotating the drive sheave 11.

  In the machine room 2, a control panel 14 and a governor 15 are installed. The control panel 14 controls the operation of the car 3 by controlling the hoisting machine 10.

  The governor 15 monitors whether the car 3 is traveling at an excessive speed. Further, the governor 15 has a governor sheave 16, an excessive speed detection switch 17, and a rope catch 18. A governor rope 19 is wound around the governor sheave 16.

  The governor rope 19 is annularly laid in the hoistway 1 and connected to the safety gear 9. Further, the governor rope 19 is wound around a pulley 20 disposed at a lower portion of the hoistway 1. When the car 3 moves up and down, the governor rope 19 circulates, and the governor sheave 16 rotates at a rotation speed corresponding to the traveling speed of the car 3.

  The governor 15 mechanically detects that the traveling speed of the car 3 has reached an excessive speed. In the governor 15, as an excessive speed to be detected, a first excessive speed higher than the rated speed and a second excessive speed higher than the first excessive speed are set.

  When the traveling speed of the car 3 reaches the first excessive speed, the excessive speed detection switch 17 is operated. When the excessive speed detection switch 17 is operated, the power supply to the hoisting machine 10 is cut off, the hoisting machine brake 12 is operated, and the car 3 stops suddenly.

  When the descending speed of the car 3 reaches the second excessive speed, the governor rope 19 is gripped by the rope catch 18 and the circulation of the governor rope 19 is stopped. When the circulation of the governor rope 19 is stopped, the safety gear 9 is operated by the relative movement of the car 3 with respect to the governor rope 19 in the downward direction. As a result, the emergency stop device 9 operates and the car 3 stops in an emergency.

  FIG. 2 is a side view showing the energy consuming device 21 of FIG. The energy consuming device 21 includes a first suction member 22, a second suction member 23, a winding mechanism 24, a plurality of (only one is shown in FIG. 2) flexible coupling bodies 25, and a plurality (FIG. (Only one is shown).

  The first and second adsorbing members 22 and 23 are attracted to each other by a magnetic force that is not separated when the car 3 is accelerated or decelerated during normal acceleration traveling, constant speed traveling, or decelerating traveling. At least one of the first and second adsorption members 22 and 23 is provided with a magnet (not shown). The magnet may be provided on both the first and second attraction members 22 and 23. Further, a magnet may be provided on one of the first and second adsorption members 22 and 23, and a magnetic body may be provided on the other.

  The winding mechanism 24 and the pulley 26 are provided on the first suction member 22. The proximal end of each connecting body 25 is wound by the winding mechanism 24. In addition, the distal end, that is, the lower end, of each connecting body 25 is pulled out from the winding mechanism 24 and connected to the second suction member 23.

  As the connecting body 25, for example, a rope or a belt similar to the suspension body 13 is used. Each connecting body 25 is wound around a pulley 26. Each connecting body 25 is guided by a pulley 26 and connected to the center of the second suction member 23 in the thickness direction (the left-right direction in FIG. 2).

  When a force greater than the suction force between the first and second suction members 22 and 23 acts, the first and second suction members 22 and 23 are separated from each other as shown in FIG. At this time, the connecting body 25 is pulled out from the winding mechanism 24 and stretched between the first suction member 22 and the second suction member 23. That is, the first and second suction members 22 and 23 are connected to each other via the connector 25.

  4 is a side view showing the counterweight 4 and the energy consuming device 21 of FIG. 1, and FIG. 5 is a side view showing a state where the first and second suction members 22, 23 of FIG. 4 are separated from each other. The second end of the suspension 13 is connected to the first suction member 22.

  The counterweight 4 has a counterweight frame 4a. The counterweight frame 4a has a counterweight upper frame 4b. The counterweight upper frame 4b is disposed horizontally above the counterweight 4.

  The second suction member 23 is provided with a counterweight upper frame via a plurality of shackle rods 27 (only one is shown in FIGS. 4 and 5) and a plurality of shackle springs 28 (only one is shown in FIGS. 4 and 5). 4b. The second suction member 23 is fixed to the upper end of the shackle rod 27.

  As an example of a test method of the safety device 9, whether the car 3 can be lowered at an excessive speed in a state where the hoist machine brake 12 is not operated, and the safety device 9 is actually operated to stop the car 3 There is a way to check.

  In this test method, when the safety device 9 is operated and the car 3 is stopped in an emergency, the counterweight 4 once falls up and then falls freely. At this time, the energy consuming device 21 consumes the energy of free fall after the counterweight 4 jumps up.

  The energy consuming device 21 according to the first embodiment consumes the energy of the free fall after the counterweight 4 is jumped up by converting the energy into a force for separating the second suction member 23 from the first suction member 22.

  The magnetic attraction force between the first suction member 22 and the second suction member 23 is determined based on the weight of the counterweight 4 and the weight of the suspension 13 in consideration of the free fall after the counterweight 4 jumps up. The first suction member 22 and the second suction member 23 are set to be separated by energy.

  In such an elevator device, since the energy of free fall after the counterweight 4 jumps up, that is, the impact force is consumed by the energy consuming device 21, the counterweight 4 transmitted to the car 3 via the suspension 13 is used. Energy of the free fall of the vehicle can be reduced. Therefore, it is possible to prevent the gripping force of the activated safety device 9 from being released by the free fall after the counterweight 4 jumps up without changing the mechanism for releasing the safety device 9 after the operation. be able to.

  In addition, since the energy of free fall after the counterweight 4 jumps up is consumed by converting it into a force for separating the first and second suction members 22 and 23 which are attracted to each other by magnetic force, a simple configuration is used. The energy of free fall of the counterweight 4 can be consumed.

  Furthermore, since the first suction member 22 and the second suction member 23 are connected by the connecting body 25, even if the second suction member 23 is separated from the first suction member 22, the counterweight 4 can be used. Will not fall.

  Furthermore, when the second suction member 23 is being sucked by the first suction member 22, the connecting body 25 is wound by the winding mechanism 24, so that the connecting body 25 is compactly stored and the first The suction member 22 and the second suction member 23 can be firmly sucked.

  Further, by providing a component that generates a force for winding the connecting body 25, for example, a spiral spring, to the winding mechanism 24, the second suction member 23 is separated from the first suction member 22, and the connecting body 25 is wound. When pulled out from the mechanism 24, a resistance force can be generated to reduce the falling speed of the counterweight 4.

  Furthermore, when the connecting body 25 is pulled out from the winding mechanism 24, the falling speed of the counterweight 4 can be reduced by the frictional force between the winding mechanism 24 and the connecting body 25.

  It is preferable that the length of the connecting body 25 be equal to or greater than the amount of the jumping of the counterweight 4 and that the counterweight 4 be stopped at 1 G or less due to the above-described deceleration effect.

The pulley 26 may be omitted if the second suction member 23 can be suspended with a certain eccentricity when the second suction member 23 is separated from the first suction member 22.
Further, the number and material of the connecting bodies 25 do not necessarily have to be the same as those of the suspension body 13.
Further, the winding mechanism 24 may be provided on the second suction member 23 or on both the first and second suction members 22 and 23.
Furthermore, the winding mechanism 24 may be omitted if the connector 25 does not interfere with the second suction member 23 being sucked by the first suction member 22.
Further, the first suction member 22 and the second suction member 23 may be respectively divided into a plurality of divided bodies.

Embodiment 2 FIG.
Next, FIG. 6 is a side view showing a main part of an elevator apparatus according to Embodiment 2 of the present invention. The energy consuming device 31 according to the second embodiment includes a first friction fastening member 32, a second friction fastening member 33, and a fastening bolt.

  The first friction fastening member 32 is connected to a second end of the suspension 13. The second friction fastening member 33 is connected to the counterweight upper frame 4 b of the counterweight 4 via the shackle rod 27 and the shackle spring 28.

  The first friction fastening member 32 and the second friction fastening member 33 are fastened by fastening bolts 34. That is, the first friction fastening member 32 and the second friction fastening member 33 are fastened with a friction force corresponding to the fastening force of the fastening bolt 34.

  In this example, the fastening bolt 34 is screwed into a screw hole of the second friction fastening member 33 through the first friction fastening member 32. The first friction fastening member 32 has an elongated hole 32a through which the fastening bolt 34 passes. Both ends of the second friction fastening member 33 in the width direction (the left-right direction in FIG. 6) are bent so as to embrace the first friction fastening member 32.

  FIG. 7 is a side view showing a state where the second friction fastening member 33 of FIG. 6 is shifted downward with respect to the first friction fastening member 32. The energy consuming device 31 consumes energy by converting the energy of the free fall after the counterweight 4 jumps up into a force for shifting the second friction fastening member 33 against the first friction fastening member 32 against the frictional force. I do.

  The frictional force between the first frictional fastening member 32 and the second frictional fastening member 33 does not shift during acceleration / deceleration of the car 3 during normal acceleration running, constant speed running, and deceleration running. Set the size as follows.

  Further, the frictional force between the first frictional fastening member 32 and the second frictional fastening member 33 is determined by the energy of free fall after the counterweight 4 jumps up in consideration of the inertial mass of the counterweight 4 and the like. The size is set so that the second frictional fastening member 33 is shifted from the first frictional fastening member 32.

  When the energy of free fall after the counterweight 4 jumps up acts on the second friction fastening member 33, the second friction fastening member 33 slides with respect to the first friction fastening member 32 while maintaining the friction holding force, The counterweight 4 is decelerated from the free fall state by the length of the long hole 32a. When the fastening bolt 34 reaches the end of the elongated hole 32a, the counterweight 4 stops when a shear force is applied to the fastening bolt 34. Other configurations are the same as those of the first embodiment.

  In such an elevator apparatus, the energy of the free fall after the counterweight 4 jumps up, that is, the impact force is consumed by the energy consuming device 31, and therefore the counterweight 4 transmitted to the car 3 via the suspension 13. Energy of the free fall of the vehicle can be reduced. Therefore, it is possible to prevent the gripping force of the activated safety device 9 from being released by the free fall after the counterweight 4 jumps up without changing the mechanism for releasing the safety device 9 after the operation. be able to.

  Further, the energy of the free fall after the counterweight 4 jumps up is changed into a force that causes a deviation between the first frictional fastening member 32 and the second frictional fastening member 33 fastened to each other by frictional force. Since the energy is consumed, the energy of free fall of the counterweight 4 can be consumed with a simple configuration.

  Note that the first frictional fastening member 32 and the second frictional fastening member 33 of the second embodiment may be replaced with each other. That is, the friction fastening member 32 of FIG. 6 may be connected to the shackle rod 27 to be a second friction fastening member, and the friction fastening member 33 of FIG. 6 may be connected to the suspension body 13 to be a first friction fastening member. In this case, the fastening bolt is normally located at the lower end of the elongated hole, and when the second friction fastening member is displaced from the first friction fastening member, the fastening bolt is relatively moved upward along the elongated hole. Moving.

Further, the layout of the elevator apparatus to which the present invention is applied is not limited to FIG. For example, the present invention can be applied to a machine room-less elevator or a 2: 1 roping elevator. In the case of a 2: 1 roping elevator, for example, an energy consuming device may be arranged between the counterweight suspender and the counterweight.
Further, in the above example, the car is the first lifting body, and the counterweight is the second lifting body. The car may be used as a second elevating body, and an energy consuming device may be arranged between the car and the suspension. Further, an emergency stop device may be mounted on both the car and the counterweight, and the energy consuming devices may be arranged on both sides of the car and the counterweight.

  3 car (first lifting body), 4 counterweight (second lifting body), 9 emergency stop device, 10 hoisting machine, 11 drive sheave, 13 suspension body, 21, 31 energy consuming device, 22 first 23 suction member, 23 second suction member, 24 winding mechanism, 25 connected body, 32 first friction fastening member, 32a long hole, 33 second friction fastening member, 34 fastening bolt.

Claims (6)

A hoist having a drive sheave,
A suspension body wound around the drive sheave,
A first lifting body suspended by the suspension on one side of the drive sheave;
A second elevating body suspended by the suspension body on the other side of the drive sheave;
An emergency stop device mounted on the first elevating body, for emergency-stopping the first elevating body when the descent speed of the first elevating body reaches an excessive speed; and And the second elevating body consumes energy of free fall after the second elevating body jumps up when the first elevating body is stopped by emergency operation of the emergency stop device. Elevator equipment equipped with an energy consuming device. The energy consuming device,
A first suction member connected to the suspension,
A second adsorbing member connected to the second elevating body and adsorbed on the first adsorbing member by magnetic force;
2. The elevator apparatus according to claim 1, wherein the energy of the free fall after the second lifting body is jumped up is converted into a force for separating the second suction member from the first suction member against the magnetic force and consumed. .   When the second suction member is separated from the first suction member, the first suction member and the second suction member are located between the first suction member and the second suction member. 3. The elevator apparatus according to claim 2, wherein a flexible connecting member stretched between the members is connected.   At least one of the first and second suction members is provided with a winding mechanism that winds the connected body when the second suction member is being sucked by the first suction member. The elevator apparatus according to claim 3, wherein: The energy consuming device,
A first friction fastening member connected to the suspension,
A second friction fastening member connected to the second lifting / lowering body and fastened to the first friction fastening member by a frictional force;
The energy of free fall after the jumping of the second elevating body is converted into a force for displacing the second friction fastening member with respect to the first friction fastening member against the frictional force and is consumed. 2. The elevator apparatus according to claim 1. The energy consuming device further includes a fastening bolt that fastens the first friction fastening member and the second friction fastening member,
The fastening bolt is screwed into one of the first and second friction fastening members and is passed through an elongated hole provided in the other of the first and second friction fastening members. Item 7. An elevator apparatus according to Item 5.

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