JP6658673B2 - Elevator governor - Google Patents

Description

  The present invention relates to an elevator governor, and more particularly, to an elevator governor used for an elevator having a different speed of raising and lowering a car.

  In an elevator, the ascending speed and the descending speed of a car are usually equal. To suppress this, the descending speed is made slower than the ascending speed.

  Governors used in elevators with different ascending and descending speeds detect abnormal speeds that exceed the rated speed at the time of ascent or the speed at the time of descending, and safely stop the car. It is required to detect overspeeds of different magnitudes set in each of the above.

  A governor is used to detect overspeed. This governor is roughly classified into a flyball type and a disk type. Conventionally, a flyball type is mainly used for a high-speed elevator, but a disk type is sometimes used for a high-speed elevator because of its compactness.

  Patent Document 1 discloses a governing device that is capable of detecting overspeeds of different magnitudes using a disc-type governor (Embodiment 2 of Patent Document 1: FIG. 9, paragraph [ 0068] to [0075]).

  The governing device described in Patent Literature 1 includes a first governor having a first rotating shaft that rotates integrally with a governor sheave on which a governor rope is hung, and a disc provided coaxially and integrally. A second governor having a second rotating shaft.

  A pair of pendulums (first pendulum) is attached to the governor sheave, and a pair of pendulums (second pendulum) is also attached to the disc.

  Further, the rotation of the first rotating shaft is configured to be intermittently connected to the second rotating shaft via a clutch mechanism. The clutch mechanism is configured to raise the car, thereby controlling the governor sheave, and thus the first rotating shaft. When the rotation shaft of the first rotation shaft rotates in the first direction, the rotation of the first rotation shaft is not transmitted to the second rotation shaft, the car descends, and the first rotation shaft moves to the first direction. Is provided such that when rotating in the opposite second direction, the rotation of the first rotating shaft is transmitted to the second rotating shaft.

  And, while the car is rising, the first pendulum revolving around the axis of the governor sheave is displaced away from the axis by centrifugal force and displaced to a position corresponding to the first overspeed, The first pendulum kicks the actuation lever of the first overspeed switch. When the first overspeed switch detects the first overspeed, the power supply to the motor that raises and lowers the car is cut off, and the car is stopped.

  On the other hand, while the car is descending, the rotation of the governor sheave is transmitted to the disk via the first rotation shaft, the clutch mechanism, and the second rotation shaft, and the rotation is centered on the axis of the disk. When the second pendulum that revolves as is displaced away from the axis by centrifugal force to a position corresponding to a second overspeed smaller than the first overspeed, the second pendulum is Kicking the actuation lever of the second overspeed switch. When the second overspeed switch detects the second overspeed, the power supply to the motor for raising and lowering the car is cut off, and the car is stopped.

  According to the conventional governing device having the above configuration, the first overspeed is detected while the car is moving up, or the second overspeed that is slower than the first overspeed is detected while the car is moving down. Then, the power supply to the electric motor is cut off, and the car is stopped.

JP 2000-327241 A JP-A-2006-108142 JP-A-2006-108143

  However, in the above conventional governing device, two overspeed switches, a first overspeed switch and a second overspeed switch, are used for the common purpose of detecting overspeed and cutting off the power supply to the motor. A switch is required.

  The present invention has been made in view of the above circumstances, and has as its object to provide a governing device capable of detecting first and second overspeeds with a single overspeed switch.

  In order to achieve the above object, the governor for an elevator according to the present invention is provided with a governor rope that travels as the car moves up and down, that is, a governor sheave that is rotated by traveling of the governor rope, and that rotates integrally with the governor sheave. A first rotating shaft, and a first operating body, wherein the first rotating shaft revolves around the axis of the first rotating shaft with the rotation of the first rotating shaft and swings by centrifugal force. An axis of the second rotating shaft includes a pendulum, a second rotating shaft provided coaxially with the first rotating shaft, and a second operating body, with the rotation of the second rotating shaft. A second pendulum oscillating by centrifugal force while revolving around a center, and the car rotating and rotating in a first direction with respect to the second rotation axis. The rotation of the first rotating shaft is shut off, and the car descends to move the first rotating shaft. A first transmission shaft that rotates in a second direction opposite to the direction, includes a clutch that transmits the rotation, and an overspeed switch that includes an actuator and is activated by being kicked by the actuator; The actuator includes a first contact portion and a second contact portion, and when the rotation speed of the governor sheave rotating in the first direction reaches a first overspeed, the first pendulum is rotated. The first contact portion is kicked by the first operating body that is displaced in a direction away from the axis of the first rotation shaft with the swing, and the governor sheave that rotates in the second direction is moved. When the rotation speed reaches a second overspeed that is slower than the first overspeed, the second displaced in a direction away from the axis of the second rotation shaft with the swing of the second pendulum. Characterized in that the second contact portion is kicked by the operating body portion of

  Further, at least one of the first contact portion and the second contact portion is provided such that a distance from an axis of the first and second rotation shafts is adjustable. .

  Further, the first contact portion and the second contact portion are provided such that the distances from the axis of the first and second rotation shafts can be adjusted independently of each other. It is characterized by the following.

  According to the elevator governing device of the present invention having the above-described configuration, the operator of the overspeed switch that operates by being kicked by the operator includes the first contact portion and the second contact portion. When the rotation speed of the governor sheave reaches the first overspeed while the car is being lifted, the first contact portion is kicked by the first operating body, and the rotation speed of the governor sheave is reduced during the descent of the car. When a second overspeed, which is slower than the first overspeed, is reached, the second contact portion is kicked by the second operating body, and the overspeed switch is activated. That is, two overspeeds, the first overspeed and the second overspeed, can be detected by a single overspeed switch.

It is a figure showing the schematic structure in the hoistway of the elevator provided with the elevator governing device concerning an embodiment. It is a front view showing the schematic structure of the above-mentioned elevator governing device. FIG. 3 is a left side view of the elevator governor shown in FIG. It is a top view showing the schematic structure of the above-mentioned elevator governing device. It is a figure showing a part of the 1st governor which the above-mentioned elevator governor has. FIG. 4 is an enlarged view in which part A in FIG. 3 is partially omitted. It is the front view of the overspeed switch shown in the state except for one side wall of the case. (A) is a figure which shows the operator which comprises the said overspeed switch, (b) is a perspective view which shows the T-shaped member which comprises the said operator.

  Hereinafter, an embodiment of an elevator speed governor according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, in the elevator 10, in this example, a hoisting machine 12 is installed at the top of a hoistway. A main rope 16 is hung on a main sheave 14 of the hoisting machine 12. A car 18 is connected to one end of the main rope 16, and a counterweight 20 is connected to the other end.

  In parallel with the main rope 16, a governor rope 22 is stretched endlessly between a governor sheave 26 and a tension sheave 28 of an elevator speed control device 24 (hereinafter, simply referred to as "speed control device 24"). ing. At an intermediate portion of the governor rope 22, an emergency stop lever 30 for operating a known emergency stop device (not shown) attached to the car 18 is fixed.

  In the elevator 10 having the above configuration, rotational power from an electric motor (not shown) whose rotation is controlled by a control device (not shown) is transmitted to the main sheave 14 of the hoisting machine 12 via a power transmission mechanism (not shown). When the sheave 14 is rotationally driven, the car 18 connected to the main rope 16 hung on the main sheave 14 is guided by a guide rail (not shown) and moves up and down in the hoistway. Accordingly, the governor rope 22 to which the emergency stop lever 30 is fixed travels, and the governor sheave 26 on which the governor rope 22 is hung is rotated at the same speed (peripheral speed) as the elevating speed of the car 18. In this case, the governor sheave 26 is rotated in the direction of the arrow U that is the first direction when the car 18 is raised, and is rotated in the direction of the arrow D that is the second direction when the car 18 is lowered.

  In the elevator 10, the rated speed (hereinafter, referred to as “rated lowering speed”) in the descending operation is set to be lower than the rated speed in the ascending operation of the car 18 (hereinafter, referred to as “rising rated speed”). I have. For example, the rated rated speed is 1000 m / min, and the rated rated speed is 600 m / min.

  The governing device 24 detects the rotation speed of the governor sheave 26 that is synchronized with the elevation speed of the car 18, and during the ascent of the car 18, the rotation speed corresponding to a predetermined speed that is higher than the rated ascent speed (hereinafter, “increase in speed”). When "speed" is detected, a stop signal of the electric motor is sent to the control device.

  In addition, when the speed control device 24 detects the rotation speed of the governor sheave 26 (hereinafter, referred to as “first lowering overspeed”) corresponding to a predetermined speed higher than the rated lowering speed during the lowering of the car 18. And sending a stop signal of the electric motor to the control device.

  If the stop signal is detected while the car 18 is moving up or down, the control device stops driving the electric motor to stop the running of the car 18.

  Further, in the speed control device 24, during the descent of the car 18, the rotation speed of the governor sheave 26 reaches a predetermined rotation speed (hereinafter, referred to as a "second descent overspeed") greater than the first descent overspeed. Then, the governor rope 22 is grasped by the grasping mechanism 124 (FIG. 2), and the traveling of the governor rope 22 is stopped. Thereby, the safety gear lever 30 is pulled up, the safety gear device (not shown) is operated, and the car 18 is safely stopped. In Japan, the second descending overspeed is usually set to a rotation speed of the governor sheave 26 corresponding to a size not exceeding 1.4 times the rated descending speed.

  Here, in this example, each of the overspeeds is in the order of ascending overspeed, second descending overspeed, and first descending overspeed from the larger one (ascending overspeed> second descending overspeed> first overspeed. Descent overspeed).

  Details of the governing device 24 that exhibits the above function will be described with reference to FIGS.

  As shown in FIGS. 3 and 4, the governing device 24 has a pedestal 32, and the pedestal 32 is provided with a first governor 34 and a second governor 36. The first governor 34 and the second governor 36 share the governor sheave 26 described above. The governor sheave 26 is formed by forming a sheave groove (not shown) having a U-shaped cross section on which the governor rope 22 is hung on the outer periphery of a metal disk. 3 and 4, the illustration of the governor rope 22 (FIGS. 1 and 2) hung on the governor sheave 26 is omitted. In FIG. 4, illustration of the gripping mechanism 124 (FIG. 2) is omitted.

  The governor sheave 26 is configured to rotate integrally with a multi-stage shaft 38 that is a first rotation axis in the speed control device 24. In this example, the multi-stage shaft 38 is fitted in a shaft hole formed in the center of the governor sheave 26 in an interference fit, and both are integrally rotated. It is sufficient that the rotation of the governor sheave is transmitted to the multi-stage shaft. For example, the two may be connected using a key. Also, the governor sheave and the multi-stage shaft may be integrally formed, instead of combining the governor sheave and the multi-stage shaft that are separately manufactured as described above.

  As described above, the first support wall 40 and the second support wall 42 that rotatably support the multi-stage shaft 38 that rotates integrally with the governor sheave 26 in a horizontal posture are erected on the pedestal 32 so as to face each other.

  The first bearing wall 46 in which the first bearing 44 is accommodated is attached to the first support wall 40. In addition, a second bearing housing 50 in which a pair of second bearings 48 is accommodated is attached to the second support wall 42.

  One end of the multi-stage shaft 38 is press-fitted into the first bearing 44, and the other end is press-fitted into the second bearing 48. Thus, the multi-stage shaft 38 is rotatably supported by the first support wall 40 and the second support wall 42 via the first bearing 44 and the second bearing 48.

  With the above configuration, when the governor rope 22 (FIGS. 1 and 2) travels and the governor sheave 26 is rotated, the multi-stage shaft 38 is rotated at the same rotational speed as the governor sheave 26.

  The first governor 34 (FIGS. 3 and 4) is a disk-type governor, and detects a rising overspeed attached to the main surface of the governor sheave 26 on the second support wall 42 side. The first detection mechanism 52 of FIG.

  The first detection mechanism 52 will be described with reference to FIG. As shown in FIG. 5, the governor sheave 26 has four windows 26A, 26B, 26C, 26D opened around the axis thereof.

  The first detection mechanism 52 has a pair of pendulums 54 and 62. Each of the pendulums 54 and 62 has plate-shaped weights 56 and 64 and bars 58 and 66 extending from the weights 56 and 64, respectively. Further, each of the pendulums 54, 62 has operation pins 60, 68 vertically attached to the weights 56, 64. The operation pins 60 and 68 function as an operation body that operates the overspeed switch 132 by kicking a first contact portion 152A described later.

  A stopper 70 is provided on the weight 56 of the pendulum 54. The stopper 70 is configured such that its base end is fixed to the weight 56 and its front end contacts the edge of the window 26A. The stopper 70 is provided in order to restrict the movement of the pendulum 54 and the like, which try to swing by the restoring force of the compression coil spring 92 described later.

  Each of the bars 58 and 66 has a longitudinally intermediate portion rotatably attached to the governor sheave 26 by pins 72 and 74. The tip of the bar 58 and the weight 64 are connected by a link 76.

  The distal end of the bar 66 is rotatably connected to one end of a rod 82 via a bracket 78 and a pin 80.

  The rod 82 has a male screw portion 82A formed with a male screw and a straight portion 82B having a circular cross section.

  A first spring seat member 84 in the shape of a screen is attached to the edge of the window 26B, and the tip of the straight portion 82B is loosely inserted into a through hole (not shown) formed in the first spring seat member 84. I have.

  Two nuts 86 and 88 are screwed into the male screw portion 82A. A dish-shaped second spring seat member 90 having a through hole (not shown) is fitted into the male screw portion 82A.

  A compression coil spring 92 is externally inserted into a portion of the rod 82 between the first spring seat member 84 and the second spring seat member 90 in a compressed state. The height (hereinafter, referred to as “initial height”) of the compression coil spring 92 during the non-rotation of the governor sheave 26 is adjusted by adjusting the tightening of the nut 86. That is, the lower the nut 86 is, the higher it is. Accordingly, at the initial height, the restoring force (biasing force) of the compression coil spring 92 acting between the first spring seat member 84 and the second spring seat member 90 can be adjusted. The nut 88 functions as a lock for the nut 86 after the adjustment.

  In the first governor 34 having the above-described configuration, when the car 18 (FIG. 1) rises and the governor sheave 26 rotates in the direction of the arrow U in FIG. 5, the pendulums 54 and 62 accordingly move the governor sheave 26 Revolves around the rotation center (the axis of the multi-stage shaft 38). The orbiting pendulums 54 and 62 rotate around the pins 72 and 74 in the directions of arrows C1 and C2, respectively, against the urging force of the compression coil spring 92 mainly by the centrifugal force acting on the weights 56 and 64 ( Swinging), and the weights 56, 64 and thus the operation pins 60, 68 are displaced radially outward of the governor sheave 26 (multi-stage shaft 38).

  When the governor sheave 26 is rotated at the overspeed in the direction of arrow U at an overspeed, the overspeed switch 132 which is actuated by being kicked by the operation pins 60, 68 revolving at the displacement position, as shown in FIG. 68 are provided above the orbital radius.

  When the overspeed switch 132 is operated, the operation signal is transmitted to the control device as a stop signal of the electric motor. Upon receiving the stop signal, the control device cuts off power supply to the electric motor and stops driving the electric motor. The details of the overspeed switch 132 will be described later.

  In the above-described example, the first detection mechanism 52 for detecting the rotation speed of the multi-stage shaft 38 that rotates with the rotation of the governor sheave 26 is attached to the governor sheave 26. However, the present invention is not limited to this. For example, another disk member (not shown) may be coaxially fixed to the multi-stage shaft 38, and the first detection mechanism 52 may be attached to the disk member to detect the rotation speed of the multi-stage shaft 38. .

Next, details of the second governor 36 will be described.
As shown in FIG. 6, the second governor 36 has a hollow shaft 94 that is a second rotating shaft in the governor 24. The hollow shaft 94 is attached to one end of the multi-stage shaft 38 via a one-way clutch 96 as a main clutch. The one-way clutch 96 interrupts the rotation of the multi-stage shaft 38 so that the rotation of the multi-stage shaft 38, in which the car 18 rises and rotates in the direction of the arrow U, relative to the hollow shaft 94, and the car 18 descends and moves in the direction of the arrow D. The rotation of the rotating multi-stage shaft 38 is provided between the multi-stage shaft 38 and the hollow shaft 94 so as to transmit the rotation.

  A rotating plate 98 is attached to the hollow shaft 94. The rotating plate 98 has a “G” shape as shown in FIG. That is, the rotating plate 98 has a shape having a vertical plate portion 98A and a horizontal plate portion 98B extending from the vertical plate portion 98A in a direction intersecting the longitudinal direction of the vertical plate portion 98A.

  Returning to FIG. 6, a mounting hole 98C is formed at the center in the longitudinal direction of the vertical plate portion 98A, and the hollow shaft 94 is fitted into the mounting hole 98C. The rotating plate 98 is connected to the hollow shaft 94 via a pair of brackets 100 and 102. One ends of the brackets 100 and 102 are fixed to the hollow shaft 94 by bolts 104 and 106, respectively. On the other hand, the other ends of the brackets 100 and 102 are fixed to the rotating plate 98 with bolts 108 and 110, respectively. As a result, the rotating plate 98 rotates integrally with the hollow shaft 94.

  A flange 112A of a flanged shaft 112 provided coaxially with the hollow shaft 94 is interposed between the one end of the brackets 100 and 102 and the hollow shaft 94. The bolts 104 and 106 are respectively inserted into two holes (not shown) formed in the flange 112A. Accordingly, the flanged shaft 112 also rotates integrally with the hollow shaft 94.

  The shaft portion 112B of the flanged shaft 112 is inserted into a one-way clutch 114 which is a sub clutch held by a holder. As shown in FIGS. 2 and 4, the holder 116 is fixed to an upper end of a column 118 erected on the pedestal 32 by a bolt 120. Returning to FIG. 6, the one-way clutch 114 is mounted in a direction in which the rotation of the flanged shaft 112 into which the shaft portion 112B is inserted in the direction of the arrow D is allowed and the rotation in the direction of the arrow U is prohibited.

  As shown in FIG. 2, the rotating plate 98 is provided with a second detection mechanism 122 for detecting the rotation speed of the hollow shaft 94.

  The second detection mechanism 122 has substantially the same configuration as the first detection mechanism 52 (FIG. 5). Therefore, the components of the second detection mechanism 122 are denoted by reference numerals in the 200's, and the last two digits are numbers (including alphabets) assigned to the corresponding components in the first detection mechanism 52. A detailed description thereof will be omitted. The stopper 270 of the second detection mechanism 122 has a base end fixed to the weight 256 and a tip end abutting against the edge of the horizontal plate 98B of the rotating plate 98. The first spring seat member 284 is also attached to the edge of the horizontal plate 98B as shown in FIG.

  The car 18 (FIG. 1) is lowered, and the governor sheave 26 rotates in the direction of arrow D, and the rotation is transmitted to the rotating plate 98. When rotated at the speed, the pendulums 254 and 262 revolve around the rotation center of the governor sheave 26 (the axis of the hollow shaft 94). The revolving pendulums 254 and 262 rotate counterclockwise in FIG. 2 around the pins 272 and 274, respectively, against the urging force of the compression coil spring 292 due to centrifugal force mainly acting on the weights 256 and 264. (Swing), the weights 256 and 264 and thus the operation pins 260 and 268 are displaced radially outward of the governor sheave 26 (hollow shaft 94).

  As shown in FIG. 3, the overspeed switch 132 that is operated by being kicked by the operation pin 260 or the operation pin 268 that revolves at the displacement position when the governor sheave 26 rotates at the first descending overspeed in the direction of arrow D, It is provided above the operation pins 260 and 268 in the revolution radial direction.

  When the overspeed switch 132 is operated, the operation is transmitted to the control device as a stop signal of the electric motor. Upon receiving the stop signal, the control device cuts off power supply to the electric motor and stops driving the electric motor.

  Returning to FIG. 2, even if the electric motor is stopped, the car 18 (FIG. 1) continues to descend and its descending speed increases, and when the rotational speed of the governor sheave 26 reaches the second descending overspeed, the governor sheave 26 The upper end of the trip lever 126 of the gripping mechanism 124 is kicked by the operation pin 260 or the operation pin 268 further displaced radially outward of the (hollow shaft 94).

  In response to the trip lever 126 being kicked, the movable grip 128 of the gripping mechanism 124 descends to its position facing the fixed grip 130 by its own weight, and the governor rope 22 is gripped by the movable grip 128 and the fixed grip 130, and the governor rope is moved. 22 is stopped. When the governor rope 22 is stopped, the safety device is operated as described above, and the car 18 (FIG. 1) is safely stopped. Since the gripping mechanism 124 is known and is not the main subject of the present invention, further detailed description will be omitted.

  Subsequently, details of the overspeed switch 132 that is activated when the rotation speed of the governor sheave 26 becomes the rising overspeed or the first descending overspeed will be described.

  As shown in FIG. 7, the overspeed switch 132 has a micro switch 134 which is a switch body. The microswitch 134 is housed in a case 138 attached to the support wall 42 via a bracket 136 (see FIGS. 2 and 3). The case 138 is in the shape of a rectangular parallelepiped box whose lower part is open.

  In the case 138, a terminal block 143 for relaying the lead wires 140 and 142 connected to the microswitch 134 to the control device (not shown) is housed.

  The overspeed switch 132 has an actuator 144 for switching the microswitch 134 from an ON state in which the actuator 134A is pressed to an OFF state in which the actuator 134A is released.

  As shown in FIG. 8, the actuator 144 includes a T-shaped member 150 formed of a rectangular plate and a plate having a tapered tip joined in an erect state in the middle of the plate in the longitudinal direction. Here, the rectangular plate portion is referred to as a "horizontal plate portion 146", and the plate portion having the tapered shape is referred to as a "vertical plate portion 148".

  The tip of the vertical plate portion 148 is concave in an arc shape, and the concave portion serves as a pressing portion 148A that directly presses down the actuator 134A. A shaft hole 148B is opened slightly above the middle of the vertical plate portion 148 in the height direction. Further, a screw hole 148C is opened slightly below the middle of the height direction.

  Screw holes 146A and 146B are formed near both ends of the horizontal plate portion 146. First and second bolts 152 and 154, which are full screw bolts, are screwed into the screw holes 146A and 146B, respectively. The lower ends of the first bolt 152 and the second bolt 154 are formed in a hemispherical shape, and the two hemispherical portions are operated pins 60, 68 (FIGS. 3, 4, and 5), operation pins 260, and 260, respectively. The first contact portion 152A and the second contact portion 154A which are kicked by 268 (FIGS. 2, 3, and 4).

  Adjustment nuts 156 and 158 and locking nuts 160 and 162 are screwed into each of the first bolt 152 and the second bolt 154.

  By loosening the adjustment nuts 156 and 158 and the locking nuts 160 and 162 and turning and screwing the first bolt 152 and the second bolt 154, the first contact portion 152A and the second contact portion 154A in the vertical direction are removed. It is possible to adjust the distance from the horizontal plate part 146, and furthermore, the distance from the axis of the multi-stage shaft 38 and the hollow shaft 94 of the first contact part 152A and the second contact part 154A. Advantages of this will be described later.

  As shown in FIG. 7, a pin 164 having one end fixed to the case 138 (a fixed portion is not shown) is attached to the shaft 144 148B of the T-shaped member 150 (FIG. 8B). )) And rotatably supported about the axis of the pin 164.

  With the vertical plate portion 148 of the T-shaped member 150 upright as shown in FIG. 7, the pressing portion 148A presses the actuator 134A of the microswitch 134. When the actuator 134A is pressed, the lead wire 140 and the lead wire 142 are electrically connected.

  A small screw 166 is screwed into the screw hole 148C of the T-shaped member 150 (FIG. 8B). Above the pin 164, a small screw 168 is provided in parallel with the pin 164. The small screw 168 is screwed into a screw hole (not shown) formed in one side wall of the case 138 and fixed to the case 138.

  A tension coil spring 170 extends between the small screw 166 and the small screw 168. The tension coil spring 170 is in a stretched state when the vertical plate portion 148 is in an upright position as shown in FIG. 7 (when the pressing portion 148A presses the actuator 134A).

  Returning to FIG. 3, the overspeed switch 132 has a first contact portion 152A located radially outward of the revolution radius (revolution area) of the operation pins 60 and 68 that revolve during normal operation. The second contact portion 154A is installed so as to be located radially outward of a revolution radius (revolution region) of 268. In this example, as shown in FIG. 2, the overspeed switch 132 is located just above the axis of the governor sheave 26 (and, consequently, the axes of the multi-stage shaft 38 and the hollow shaft 94) in the front view. Is installed to be located.

  In the governing device 24 having the above-described configuration, when the car 18 (FIG. 1) rises and the governor sheave 26 rotates in the direction of the arrow U in FIG. 5, and when the rotation speed reaches the rising overspeed, the governor sheave 26 (multi-stage The revolving radius of the operation pins 60 and 68 revolving around the axis of the shaft 38) increases until the operation pins 60 and 68 kick the first contact portion 152A of the overspeed switch 132. As a result, one of the operation pins 60 and 68 is moved in the direction of arrow E in FIG. 7 to the first contact portion 152A (in FIG. 7, the first contact portion 152A is located behind the second contact portion 154A). (Not shown in the figure.)

  The actuator 144 whose first contact portion 152A has been kicked in the direction of arrow E rotates counterclockwise around the pin 164, and the pressing portion 148A comes off the actuator 134A. Thereby, the microswitch 134 switches from the ON state in which the actuator 134A is pressed to the OFF state in which it is released. In the present embodiment, “the overspeed switch 132 operates” means that the micro switch 134 is switched from the ON state to the OFF state. The operation of the overspeed switch 132 is detected by the control device (not shown) as a stop signal for the electric motor (not shown). The control device that has detected the stop signal stops the electric motor as described above.

  In addition, the actuator 144 rotated counterclockwise is stopped at a position where the tension coil spring 170 is shortened and the rotational balance is obtained, and assumes the posture indicated by the one-dot chain line. The overspeed switch 132 is a so-called manual reset type switch, and the operator 144 does not automatically return to the position shown by the solid line in FIG. 7 from the operating state. Need work.

  On the other hand, in the governing device 24, when the car 18 (FIG. 1) descends and the governor sheave 26 rotates in the direction of arrow D in FIG. 2, and when the rotation speed reaches the first descending overspeed, the governor sheave 26 (hollow shaft) The revolving radius of the operation pins 260 and 268 revolving around the axis of 94) increases until the operation pins 260 and 268 kick the second contact portion 154A of the overspeed switch 132. As a result, one of the operation pins 260 and 268 kicks the second contact portion 154A in the direction of arrow G in FIG. The actuator 144 whose second contact portion 154A has been kicked in the direction of the arrow G rotates clockwise around the pin 164 to assume a position shown by a two-dot chain line, and the overspeed switch 132 is operated. . When the overspeed switch 132 operates, the electric motor is stopped in the same manner as described above.

  As described above, according to the governing device 24 according to the embodiment, the actuator 144 of the overspeed switch 132 includes the first contact portion 152A and the second contact portion 154A, and the cage 144 (see FIG. 1). When the rotation speed of the governor sheave 26 reaches the rising overspeed during the ascent, the first contact portion 152A is kicked by the operation pins 60 and 68, and the rotation speed of the governor sheave 26 reaches the first descending overspeed during the lowering of the car 18. When it reaches, the second contact portion 154A is kicked by the operation pins 260 and 268, and the overspeed switch 132 is operated. As a result, the power supply to the electric motor (not shown) is cut off and the car 18 is stopped. That is, two overspeeds, an ascending overspeed and a first descending overspeed, can be detected by the single overspeed switch 132. For this reason, it is more economical than using two overspeed switches in the past, and it is possible to reduce the labor of wiring from the overspeed switch to the control device for controlling the entire elevator by half.

  Further, according to the present embodiment, when the governor sheave 26 reaches the ascending overspeed or the first descending overspeed, the adjustment for operating the overspeed switch is more convenient than before. .

  For example, a case of an ascending overspeed (first governor 34) will be described. The magnitude of the revolving radius of the operation pins 60 and 68 with respect to the rotation speed of the governor sheave 26 (multi-stage shaft 38) depends on the initial height of the compression coil spring 92 (FIG. 5) (the compression coil spring when the governor sheave 26 is not rotating). 92 height). Adjustment of the initial height is performed by turning the nut 86 (FIG. 5) as described above. Conventionally, in order to operate the overspeed switch just when the ascending overspeed is reached, only the initial height of the compression coil spring is adjusted.

  On the other hand, in the present embodiment, as described with reference to FIG. 8, the distance of the first contact portion 152A from the horizontal plate portion 146 in the up-down direction, and thus the multi-stage shaft 38 of the first contact portion 152A. The distance from the axis is adjustable. Accordingly, the rotation speed of the governor sheave 26 when the overspeed switch operates can be changed without changing the initial height of the compression coil spring 92. As the first contact portion 152A approaches the multi-stage shaft 38, the governor sheave 26 (multi-stage shaft 38) causes the operation pins 60 and 68 to kick the first contact portion 152A at a lower rotation speed. This is because the governor sheave 26 (multi-stage shaft 38) kicks the first contact portion 152A at a higher rotation speed as the contact portion 152A is farther from the multi-stage shaft 38.

  More specifically, when it is desired to reduce the rotation speed of the governor sheave 26 when the overspeed switch is operated, the first contact portion 152A is brought closer to the multi-stage shaft 38, and when it is desired to increase the rotation speed, the first contact portion 152A is provided. It is only necessary that the contact portion 152A be kept away from the multi-stage shaft 38.

  As described above, in the present embodiment, in addition to the adjustment of the initial height of the compression coil spring 92, the adjustment of the distance of the first contact portion 152A from the axis of the multi-stage shaft 38 causes the operation of the overspeed switch 132. The rotation speed of the governor sheave 26 can be set, which is more convenient than before.

  In particular, as shown in FIG. 3, in order to detect two overspeeds, an ascending overspeed and a first descending overspeed, the first detection mechanism 52 and the second detection mechanism 122 are arranged in close proximity to each other. In the speed device 24, as can be recognized from this drawing, the work space for turning the nut 86 (FIG. 5) for adjusting the initial height of the compression coil spring 92 (FIG. 5) is small. For this reason, work efficiency is not good when only the initial height is adjusted. Therefore, after roughly adjusting the initial height of the compression coil spring 92, in the overspeed switch 132 in which a sufficient working space is secured, the distance of the first contact portion 152A from the multi-stage shaft 38 is finely adjusted. By doing so, the overall work efficiency is improved.

  Needless to say, this advantage is similarly exerted in the second governor 36 (the second detection mechanism 122) for detecting the first descending overspeed.

  Further, as is clear from the above description, the distances of the first contact portion 152A and the second contact portion 154A from the axis of the multi-stage shaft 38 and the hollow shaft 94 can be adjusted independently of each other. As a matter of course, the adjustment for detecting the ascending overspeed and the first descending overspeed can be performed individually without the result of one adjustment affecting the adjustment of the other.

  As described above, the elevator governing device according to the present invention has been described based on the embodiment. However, the present invention is not limited to the above-described embodiment, and may be, for example, the following embodiment.

  (1) In the above embodiment, the lower ends (the first contact portion 152A and the second contact portion 154A) of the first bolt 152 and the second bolt 154 attached to the T-shaped member 150 are the operation pins 60 and 68, respectively. Although it is configured to be kicked by the operation pins 260 and 268, the present invention is not limited to this. It may be configured to be kicked with.

  In this case, both the first bolt 152 and the second bolt 154 may be replaced with the bar, or one of the first bolt 152 and the second bolt 154 may be replaced with the bar.

  (2) In the above-described embodiment, the operation pins 60 and 68 attached to the weights 56 and 64, the weights 256 and 264 are used as the operation body for operating the overspeed switch 132 by kicking the operator 144 of the overspeed switch 132. Although the operation pins 260 and 268 are used, the invention is not limited to this, and the weight of the actuators 144 may be directly kicked by the weights 56 and 64 and the weights 256 and 264. That is, one portion of the outer periphery of each of the plate-shaped weights 56 and 64 and the weights 256 and 264 may be used as the operation body.

  (3) In the above embodiment, the overspeed switch 132 is installed directly above the axis of the multi-stage shaft 38. However, the installation position of the overspeed switch 132 is not limited to this. , Between right beside and right above.

  (4) In the above embodiment, the micro switch 134 is used as the switch body of the overspeed switch 132, but the switch body is not limited to this, and another type of switch such as a limit switch may be used. Absent. In short, any switch may be used as long as the switch including the first contact portion and the second contact portion is switched between ON and OFF states by being kicked.

  (5) The one-way clutch 96 is used as the main clutch and the one-way clutch 114 is used as the sub-clutch. However, the one-way clutch 96 is disposed on one or both of the main clutch and the sub-clutch, for example, between the rear wheel gear and the rear wheel axle of the bicycle. Such a free gear may be used. The free gear includes an internal gear and a boss provided with a pawl with a pawl spring. When the boss rotates forward, the pawl engages with the teeth of the internal gear and the rotation of the boss is changed to the internal gear. When the boss reverses, the pawl slides on the teeth of the internal gear and does not transmit power.

  INDUSTRIAL APPLICABILITY The elevator governor according to the present invention can be suitably used, for example, as an elevator governor in which the speed at which a car moves up and the speed at which it descends differ.

26 Governor sheave 38 Multi-stage shaft 54, 62, 254, 262 Pendulum 60, 68, 260, 268 Operation pin 94 Hollow shaft 96 One-way clutch 132 Overspeed switch 144 Actuator 152A First contact portion 154A Second contact portion

Claims (3)

A governor sheave that is hung with a governor rope that travels with the elevation of the car and that is rotated by traveling of the governor rope,
A first rotating shaft that rotates integrally with the governor sheave;
A first pendulum including a first operating body, and swinging by centrifugal force while revolving around the axis of the first rotating shaft with the rotation of the first rotating shaft;
A second rotating shaft provided coaxially with the first rotating shaft;
A second pendulum including a second operating body, and swinging by centrifugal force while revolving around the axis of the second rotating shaft with the rotation of the second rotating shaft;
The rotation of the first rotating shaft is stopped relative to the second rotating shaft, the rotation of the first rotating shaft, in which the car rises and rotates in the first direction, is cut off, and the car descends. A clutch that transmits the rotation of the first rotation shaft that rotates in a second direction opposite to the first direction;
An overspeed switch that includes an actuator and is activated by the actuator being kicked;
Has,
The actuator includes a first contact portion and a second contact portion,
When the rotation speed of the governor sheave rotating in the first direction reaches a first overspeed, the displacement is performed in a direction away from the axis of the first rotation shaft with the swing of the first pendulum. The first contact portion is kicked by the first operating body,
When the rotation speed of the governor sheave rotating in the second direction reaches a second overspeed that is slower than the first overspeed, the rotation of the second rotation shaft is caused by the swing of the second pendulum. An elevator governing device, wherein the second contact portion is kicked by the second operating body that is displaced away from the axis.   The at least one of the first contact portion and the second contact portion is provided such that a distance from an axis of the first and second rotation shafts is adjustable. 2. The elevator governing device according to claim 1.   The first contact portion and the second contact portion are provided such that distances from the axis of the first and second rotation shafts can be adjusted independently of each other. The speed control device for an elevator according to claim 1, characterized in that:

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