JP2019172424A - Door open travel protection device of elevator - Google Patents

Abstract

To obtain a door open travel protection device of an elevator that can operate more surely.SOLUTION: The door open travel protection device of the elevator includes an emergency stop device 301 for urgently stopping a car 1, a cam 302 fixed with respect to a hoistway, and a driving device 303 for operating the emergency stop device 301. The emergency stop device 301 has a frame body 314, and a movable body 315 displaced between a bite position and a separation position. The driving device 303 includes an injection spring 317 which energizes the movable body 315 in a direction of displacing the movable body 315 to the bite position from the separation position, and a movable body side lever 318 which regulates the displacement of the movable body 315 to the bite position from the separation position. When a car door 12 is displaced from a door closed position to a door opened position and the car 1 is moved, the movable body side lever 318 abuts on the cam 302 so as to release the regulation of the movable body 315 by the movable body side lever 318.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an elevator opening protection device for an elevator that prevents a car from traveling while the car door is in the door open position.

  Conventionally, an emergency stop device provided on the car to emergency stop the descent of the car, a governor rope connected to the car, and an emergency stop device to prevent the car from descending when the speed of the car exceeds the set value. 2. Description of the Related Art An elevator door opening travel protection device having a governor for stopping is known. The governor has a sheave around which the governor rope is wound, and a ratchet that is provided on the sheave and rotates with the sheave when the speed at which the car descends reaches a preset overspeed. is doing. The speed governor includes a latch portion that rotates the ratchet by engaging the ratchet, a shoe that brakes the speed governor rope when the ratchet rotates, a standby position where the latch portion is separated from the ratchet, and a latch portion. And a lever that is displaced between engagement positions for engagement with the ratchet. The governor includes an actuator that displaces the lever, and a door opening detection unit that detects the door opening and operates the actuator. In this elevator door open travel protection device, when the car is lowered with the car door in the door open position, the actuator operates to engage the latch portion with the ratchet via the lever, so that the ratchet Rotate. Thereby, the shoe brakes the governor rope, and the emergency stop device makes an emergency stop of the lowering of the car (for example, see Patent Document 1).

JP 2011-246241 A

  However, the actuator includes a spring, a solenoid that biases the spring against the elastic force of the spring, and a control circuit unit that supplies a current to the solenoid. Therefore, when a failure occurs in the control circuit unit, there is a problem that the elevator door opening travel protection device may not operate.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator door opening travel protection device that can operate more reliably.

  An elevator door opening travel protection device according to the present invention includes an emergency stop device that is provided in a car and that makes an emergency stop of the car, a cam that is fixed to a hoistway, and a drive device that operates the emergency stop device. The safety device includes a frame body including an inclined surface facing the guide portion side surface of the guide rail, a biting position for biting between the inclined surface and the guide portion side surface, and a spaced position separating from the inclined surface and the guide portion side surface. The drive device includes a first elastic body that urges the movable body in a direction in which the movable body is displaced from the separated position to the biting position, and the movable body is bitten from the separated position. A restricting body that restricts displacement to a position, and the restricting body uses a power of a car door, and a retreat position that separates from the cam when viewed from above, and a contact position that at least partially overlaps the cam. Can be displaced between The position of the control body is the retracted position when the position of the car door is the door closed position, and the contact position when the position of the car door is the door open position. When the car moves in the position, the restriction of the movable body is released by the restriction body hitting the cam.

  According to the elevator door-opening travel protection device according to the present invention, when the car door is displaced from the door-closed position to the door-open position and the car moves, the restricting body hits the cam, thereby Release the restriction of the movable body. Thereby, the emergency stop device makes an emergency stop of the movement of the car. Therefore, the emergency stop device can emergency stop the movement of the car without having the control circuit unit. Therefore, the door opening travel protection device of the elevator can operate more reliably.

It is a front view which shows the principal part of the elevator provided with the door opening travel protection device of the elevator which concerns on Embodiment 1 of this invention. It is a side view which shows the principal part of the elevator of FIG. It is an enlarged view which shows the A section of FIG. It is a top view which shows the principal part of the drive device of FIG. It is an enlarged view which shows the B section of FIG. It is a side view which shows the principal part of the door opening travel protection apparatus of FIG. It is an enlarged view which shows the principal part of the wire rope and door side lever of FIG. It is a top view which shows the principal part of the wire rope and door side lever of FIG. It is a side view which shows the principal part of the door opening travel protection apparatus of FIG. It is a top view which shows the principal part of the drive device when the cage door of FIG. 4 is displaced. It is a side view which shows the principal part of the door opening travel protection apparatus when the movable body side lever of FIG. 9 displaces. It is a side view which shows the principal part of the door opening travel protection apparatus when the projection part of FIG. 11 hits a cam. It is a side view which shows the principal part of the door opening travel protection apparatus when the nail | claw part of FIG. 12 remove | deviates from a recessed part. It is a top view which shows the principal part of a drive device when the door side lever of FIG. 10 rotates further. It is a side view which shows the principal part of a drive device when the movable body of FIG. 13 displaces. It is a top view which shows the principal part of the drive device when the cage door of FIG. 14 is displaced. It is a top view which shows the procedure which displaces the door side lever of FIG. 16 from a door open position to a door closed position.

Embodiment 1 FIG.
FIG. 1 is a front view showing an essential part of an elevator provided with an elevator door opening travel protection device according to Embodiment 1 of the present invention. The elevator includes a car 1 that moves up and down the hoistway, a pair of guide rails 2 that guide the car 1, and four door-open travel protection devices 3.

  The car 1 includes a car body 11 in which a car doorway is formed, a car door 12 that opens and closes the car doorway, and a car door drive device 13 that moves the car door 12 between a door open position and a door close position. ing. The car 1 includes a car floor 14 that supports the car body 11, a car frame 15 that supports the car floor 14, and a plurality of guide rollers 16 provided on the car frame 15.

  The guide rail 2 is formed in a T-shaped cross section. The guide rail 2 has a base portion 21 arranged along the wall of the hoistway and a guide portion 22 extending from the base portion 21 toward the other guide rail 2 when viewed from above. The plurality of guide rollers 16 roll on a pair of guide portion side surfaces 221 that are side surfaces of the guide portion 22 and a guide portion front end surface 222 that is a front end surface of the guide portion 22.

  Two door opening travel protection devices 3 are arranged at the upper part of the car 1 and two are arranged at the lower part of the car 1. The door-opening travel protection device 3 arranged at the upper part of the car 1 makes the raising of the car 1 emergency stop. The door-opening travel protection device 3 disposed at the lower part of the car 1 makes the car 1 descending in an emergency stop. Hereinafter, the door-opening travel protection device 3 disposed at the lower part of the car 1 will be described, but the door-opening travel protection device 3 disposed at the upper part of the car 1 has the same configuration.

  FIG. 2 is a side view showing a main part of the elevator shown in FIG. The door-opening travel protection device 3 is provided in the car 1, and includes an emergency stop device 301 that makes the car 1 stop emergency, a cam 302 that is fixed to the hoistway, and a drive device 303 that operates the emergency stop device 301. I have.

  3 is an enlarged view showing a portion A of FIG. 2, and FIG. 4 is a plan view showing a main part of the driving device 303 of FIG. The drive device 303 includes a door-side lever 304 that is a door-side displacement body, a door-side lever support bar 305 that rotatably supports the door-side lever 304, and a long body having one end connected to the door-side lever 304. And a wire rope 306. The drive device 303 has one end connected to the door lever 304 and a door side lever return spring 307 that is a third elastic body that biases the door side lever 304, and the other end of the door side lever return spring 307. And a door-side lever return spring fixing rod 308 connected to. The driving device 303 is a plurality of pulleys 309 around which the wire rope 306 is wound, a stopper 310 that restricts the rotation of the door side lever 304, and a second elastic body that suppresses the wire rope 306 from loosening. And a loosening prevention spring 311. Further, the drive device 303 includes a return prevention device 312 that restricts the rotation of the door lever 304 and a flange 313 that is provided at the end of the wire rope 306 and hits the return prevention device 312.

  The door-side lever support bar 305 is disposed so as to extend in the height direction. The door side lever support bar 305 is provided at one end of the door side lever 304. The door-side lever 304 rotates around the door-side lever support bar 305. The door-side lever 304 is displaced between a door closing position at least a part of which is located in the moving area of the car door 12 and a door opening position deviating from the moving area of the car door 12. When the car door 12 is displaced from the door closed position to the door open position, the car door 12 hits the door lever 304. When the car door 12 hits the door-side lever 304, the door-side lever 304 is displaced from the door closing position to the door opening position.

  The door-side lever return spring 307 biases the door-side lever 304 in a direction in which the door-side lever 304 is displaced from the door open position to the door close position. Thereby, when the car door 12 is displaced from the door open position to the door close position, the door side lever 304 is displaced from the door open position to the door close position. The stopper 310 restricts the rotation of the door lever 304 against the elastic force of the door lever return spring 307 when the door lever 304 is in the door closing position.

  The wire rope 306 is connected to the other end of the door lever 304. Thereby, the wire rope 306 is sent out by the door side lever 304 being displaced from the door closing position to the door opening position. On the other hand, when the door-side lever 304 is displaced from the door open position to the door close position, the wire rope 306 is pulled back. In other words, the wire rope 306 moves due to the displacement of the door lever 304.

  FIG. 5 is an enlarged view showing a portion B of FIG. 1, and FIG. 6 is a side view showing a main part of the door-opening travel protection device 3 of FIG. The emergency stop device 301 includes a pair of frame bodies 314 fixed to the car frame 15 and a movable body 315 provided between the guide rail 2 and the frame body 314. The pair of frame bodies 314 are arranged so as to sandwich the guide portion 22 therebetween. The pair of movable bodies 315 are arranged so as to sandwich the guide portion 22. The movable body 315 is rotatably provided.

  The frame body 314 has an inclined surface 316 that faces the guide portion side surface 221. The inclined surface 316 is disposed to be inclined with respect to the horizontal plane. Further, the inclined surface 316 is inclined with respect to the horizontal plane so as to approach the guide portion side surface 221 as it goes upward.

  The movable body 315 is displaced between a biting position where the movable body 315 bites between the inclined surface 316 and the guide portion side surface 221 and a separated position away from the inclined surface 316 and the guide portion side surface 221. When the position of the movable body 315 is the biting position, the lowering of the car 1 is stopped in an emergency. On the other hand, when the position of the movable body 315 is the separated position, the car 1 can freely move up and down.

  The cam 302 is fixed with respect to the guide rail 2. The cam 302 is disposed away from the moving area of the guide roller 16.

  The drive device 303 includes an injection spring 317 that is a first elastic body that biases the movable body 315 in a direction in which the movable body 315 is displaced from the separated position to the biting position, and the movable body 315 is displaced from the separated position to the biting position. A movable body side lever 318 that is a regulating body that restricts the movement and a movable body side lever support bar 319 that rotatably supports the movable body side lever 318 are provided.

  The elastic force of the door side lever return spring 307 is larger than the elastic force of the injection spring 317. The elastic force of the loosening prevention spring 311 is smaller than the elastic force of the injection spring 317.

  When viewed from above, the movable body side lever 318 can be displaced between a retracted position away from the cam 302 and a contact position at least partially overlapping the cam 302. The movable body side lever 318 is displaced between the retracted position and the contact position using the power of the car door 12. When the position of the movable body side lever 318 is a contact position and the car is lowered, the movable body side lever 318 hits the cam 302. When the movable body side lever 318 hits the cam 302, the restriction of the movable body 315 by the movable body side lever 318 is released. Thereby, the movable body 315 is displaced from the separated position to the biting position by the elastic force of the injection spring 317.

  The driving device 303 also supports the movable body 315 and is displaced by the movement of the wire rope 306, the support rod support portion 321 that movably supports the support rod 320, and the receiver fixed to the support rod 320. 322, a movable body side lever pressing spring 323 provided across the support bar support section 321 and the movable body side lever 318, and a spring receiving section 324 fixed to the support bar 320.

  An injection spring 317 is disposed between the support bar support portion 321 and the spring receiving portion 324. The injection spring 317 biases the movable body 315 when the injection spring 317 biases the support rod support portion 321 and the spring support portion 324 in a direction in which the support rod support portion 321 and the spring receiving portion 324 are separated from each other.

  The other end of the wire rope 306 is connected to the receiving part 322. Thereby, the receiving part 322 moves when the wire rope 306 moves. The receiving part 322 has a large diameter part 325, a small diameter part 326 provided on the wire rope 306 side of the large diameter part 325, and a concave part 327 provided between the large diameter part 325 and the small diameter part 326. is doing. The radial dimension of the small diameter part 326 is smaller than the radial dimension of the large diameter part 325. The radial dimension of the recess 327 is smaller than the radial dimension of the small diameter part 326.

  The movable body side lever 318 is provided on the lever body 328 that rotates around the movable body side lever support bar 319, the claw portion 329 that contacts the receiving portion 322, the lever body 328, and the cam 302. And a projecting portion 330 that hits. When the claw portion 329 is in contact with the side surface of the large diameter portion 325, the position of the movable body side lever 318 is the retracted position. When the nail | claw part 329 is inserted in the recessed part 327, the position of the movable body side lever 318 becomes a contact position. The movable body side lever pressing spring 323 pushes the movable body side lever 318 so that the claw portion 329 contacts the side surface of the receiving portion 322, that is, the side surface of the large diameter portion 325, the side surface of the concave portion 327, and the side surface of the small diameter portion 326. By inserting the claw portion 329 into the recess 327, the movable body side lever 318 is hooked on the receiving portion 322. When the movable body side lever 318 is hooked on the receiving portion 322, the movable body side lever 318 regulates the displacement of the movable body 315 from the separated position to the biting position.

  7 is an enlarged view showing the main parts of the wire rope 306 and the door-side lever 304 of FIG. 4, and FIG. 8 is a plan view showing the main parts of the wire rope 306 and the door-side lever 304 of FIG. In FIG. 8, a part of the door-side lever 304 is shown in cross section. The wire rope 306 is provided on the wire rope main body 331, the wire rope caulking fixing portion 332, which is a long-body large-diameter portion provided at the end of the wire rope main body 331, and the wire rope caulking fixing portion 332 to prevent loosening. And a loosening prevention spring insertion portion 333 inserted into the spring 311.

  The door side lever 304 is formed with an insertion groove 334 into which the wire rope caulking fixing portion 332 is inserted. A slit 335 extending to the insertion groove 334 is formed on the side wall of the door side lever 304. The dimension in the width direction of the slit 335 is smaller than the dimension in the radial direction of the wire rope caulking fixing portion 332. As the wire rope body 331 passes through the slit 335, the wire rope 306 is attached to and detached from the door lever 304.

  In the insertion groove 334, a loosening prevention spring 311 and a loosening prevention spring insertion portion 333 are formed with a receiving surface 336 on which the wire rope 306 hits the longitudinal direction. When the loosening prevention spring insertion part 333 hits the receiving surface 336, the loosening prevention spring 311 is prevented from having a lengthwise dimension smaller than the lengthwise dimension of the loosening prevention spring insertion part 333.

  Next, the operation of the door-open travel protection device 3 will be described. FIG. 9 is a side view showing a main part of the door-opening travel protection device 3 of FIG. When the position of the car door 12 is the door closed position, the claw portion 329 contacts the side surface of the large diameter portion 325, and the position of the movable body side lever 318 becomes the retracted position. In this case, even if the car 1 moves up and down, the protrusion 330 does not hit the cam 302.

  FIG. 10 is a plan view showing the main part of the drive device 303 when the car door 12 of FIG. 4 is displaced, and FIG. 11 is the essential part of the door-opening travel protection device 3 when the movable body side lever 318 of FIG. 9 is displaced. It is a side view which shows a part. When the car door 12 is displaced from the door-closed position to the door-open position, the door-side lever 304 rotates about the door-side lever support rod 305, and the door-side lever 304 is displaced from the door-closed position to the door-opened position. . Thereby, the wire rope 306 is sent out. When the wire rope 306 is fed out, the receiving portion 322 is moved by the elastic force of the injection spring 317, the claw portion 329 is inserted into the concave portion 327, and the movable body side lever 318 is displaced from the retracted position to the contact position.

  12 is a side view showing the main part of the door-opening travel protection device 3 when the projection 330 of FIG. 11 hits the cam 302, and FIG. 13 is the door-opening travel when the claw portion 329 of FIG. 3 is a side view showing a main part of the protection device 3. FIG. When the position of the movable body side lever 318 is the contact position and the car 1 is lowered, the projection 330 strikes the cam 302 from above. Thereby, the nail | claw part 329 remove | deviates from the recessed part 327. FIG.

  14 is a plan view showing a main part of the driving device 303 when the door-side lever 304 of FIG. 10 is further rotated, and FIG. 15 is a main part of the driving device 303 when the movable body 315 of FIG. 13 is displaced. FIG. When the nail | claw part 329 remove | deviates from the recessed part 327, the wire rope 306 is further sent out with the elastic force of the injection spring 317, and the movable body 315 is displaced from a separation position to a biting position. Thereby, the car 1 is brought to an emergency stop.

  When the position of the movable body 315 is the biting position, the flange 313 provided on the wire rope 306 hits the return prevention device 312. Thereby, the door lever 304 is restricted from rotating in the direction in which the wire rope 306 is pulled back. FIG. 16 is a plan view showing a main part of the driving device 303 when the car door 12 of FIG. 14 is displaced. When the position of the movable body 315 is the biting position and the car door 12 is displaced from the door open position to the door close position, the door lever 304 is restricted from being displaced from the door open position to the door close position. The Thereby, the position of the movable body 315 remains at the biting position, and the emergency stop of the car 1 is maintained.

  FIG. 17 is a plan view showing a procedure for displacing the door-side lever 304 of FIG. 16 from the door open position to the door close position. In order to displace the door lever 304 from the door open position to the door close position when the position of the movable body 315 is the biting position, the operator uses the restriction release rod 337 to return the collar portion 313. The state of hitting the prevention device 312 is released. When the collar portion 313 does not come into contact with the return prevention device 312, the door side lever 304 is displaced from the door open position to the door close position by the elastic force of the door side lever return spring 307.

  As described above, according to the elevator door-opening travel protection device 3 according to Embodiment 1 of the present invention, the car 1 moves when the car door 12 is displaced from the door-closed position to the door-open position. In this case, when the movable body side lever 318 hits the cam 302, the movable body side lever 318 releases the restriction of the movable body 315. Thereby, the emergency stop device 301 makes an emergency stop of the movement of the car 1. Therefore, the emergency stop device 301 can stop the movement of the car 1 without having the control circuit unit. Therefore, the door opening travel protection device 3 of the elevator can operate more reliably.

  In addition, the driving device 303 includes a door-side lever 304 that is displaced between a door-closed position and a door-open position, and a wire rope 306 that is moved by the displacement of the door-side lever 304 to displace the movable body-side lever 318. Have. When the car door 12 is displaced from the door-closed position to the door-open position, the door-side lever 304 is displaced from the door-closed position to the door-opened position when the car door 12 hits the door-side lever 304. Thereby, the movable body side lever 318 is displaced using the power of the car door 12.

  The driving device 303 includes a support bar 320 that supports the movable body 315 and is displaced by the movement of the wire rope 306, and a receiving portion 322 that is fixed to the support bar 320 and on which the movable body side lever 318 is hooked. The movable body side lever 318 is displaced from the retracted position to the contact position and is hung on the receiving portion 322 when the door lever 304 is displaced from the door closed position to the door open position and the support bar 320 is displaced. The movable body side lever 318 restricts the movable body 315 from being displaced from the separated position to the biting position when the movable body side lever 318 is hooked on the receiving portion 322. Thereby, the movable body side lever 318 is applied to the cam 302 when the position of the car door 12 is the door open position.

  Further, the driving device 303 includes a loosening prevention spring 311 that suppresses the wire rope 306 from loosening. Thereby, the wire rope 306 can be moved more reliably in conjunction with the displacement of the door lever 304.

  The drive device 303 also includes a door-side lever return spring 307 that biases the door-side lever 304 in a direction in which the door-side lever 304 is displaced from the door open position to the door close position. Thereby, the door side lever 304 can be displaced more reliably in conjunction with the displacement of the car door 12.

  The wire rope 306 includes a wire rope main body 331 and a wire rope caulking fixing portion 332 that is provided at an end of the wire rope main body 331 and has a radial dimension larger than a radial dimension of the wire rope main body 331. Yes. The door side lever 304 is formed with an insertion groove 334 into which the wire rope caulking fixing portion 332 is inserted. A slit 335 extending to the insertion groove 334 is formed on the side wall of the door side lever 304. The dimension in the width direction of the slit 335 is smaller than the dimension in the radial direction of the wire rope caulking fixing portion 332. Thereby, the wire rope 306 can be easily fixed to the door lever 304.

  DESCRIPTION OF SYMBOLS 1 Car, 2 guide rail, 3 door open travel protection device, 11 car main body, 12 car door, 13 car door drive device, 14 car floor, 15 car frame, 16 guide roller, 21 base, 22 guide part, 221 guide part Side, 222 Guide end surface, 301 Emergency stop device, 302 Cam, 303 Drive device, 304 Door lever, 305 Door lever support rod, 306 Wire rope, 307 Door lever return spring, 308 Door lever return spring fixed Bar, 309 pulley, 310 stopper, 311 loosening prevention spring, 312 return prevention device, 313 collar, 314 frame, 315 movable body, 316 inclined surface, 317 injection spring, 318 movable body side lever, 319 movable body side lever support rod, 320 Support rod, 321 Support rod support portion, 322 receiving portion, 323 movable body side lever Attached spring, 324 Spring receiving part, 325 Large diameter part, 326 Small diameter part, 327 Recessed part, 328 Lever body, 329 Claw part, 330 Projection part, 331 Wire rope body, 332 Wire rope caulking fixing part, 333 Loosening prevention spring insertion part 334 Insertion groove, 335 slit, 336 receiving surface, 337 restriction release rod.

Claims (6)

An emergency stop device provided in the car for emergency stop of the car;
A cam fixed to the hoistway;
A drive device for operating the emergency stop device,
The emergency stop device is separated from the frame including an inclined surface facing the guide portion side surface of the guide rail, the biting position between the inclined surface and the guide portion side surface, and the inclined surface and the guide portion side surface. A movable body that is displaced between the separated positions,
The driving device includes a first elastic body that biases the movable body in a direction in which the movable body is displaced from the separated position to the biting position, and the movable body is displaced from the separated position to the biting position. And a regulatory body that regulates
The restricting body is displaceable between a retracted position away from the cam and a contact position at least partially overlapping the cam when viewed from above using the power of a car door,
The position of the regulating body is the retracted position when the position of the car door is the door closed position, and the contact position when the position of the car door is the door open position,
When the position of the car door is the door open position and the car moves, the restricting body is an elevator door that cancels the restriction of the movable body when the restricting body hits the cam. Open travel protection device. The drive device includes a door-side displacement body that is displaced between a door-closed position at least a part of which is disposed in the moving area of the car door and a door-opening position that deviates from the moving area; A long body that moves by displacement of the restricting body,
When the car door is displaced from the door-closed position to the door-open position, the door-side displacement body is moved from the door-closed position to the door-open-time position when the car door hits the door-side displacement body. The elevator door opening travel protection device according to claim 1, which is displaced by The drive device further includes a support rod that supports the movable body and is displaced by the movement of the elongated body, and a receiving portion that is fixed to the support rod and on which the regulation body is hung.
The restricting body is displaced from the retracted position to the contact position by the door-side displacement body being displaced from the door-closed position to the door-opened position and the support bar is displaced, and the receiving portion Hung
The door opening travel protection device for an elevator according to claim 2, wherein the restricting body restricts the movable body from being displaced from the separated position to the biting position when the restricting body is hooked on the receiving portion. .   The elevator drive protection device according to claim 2 or 3, wherein the drive device further includes a second elastic body that suppresses the elongate body from loosening.   The drive device further includes a third elastic body that biases the door-side displacement body in a direction in which the door-side displacement body is displaced from the door-opening position to the door-closing position. The door opening travel protection device for an elevator according to any one of claims 4 to 5. The long body includes a long body main body, and a long body large diameter portion which is provided at an end of the long body main body and has a radial dimension larger than a radial dimension of the long body main body. ,
The door-side displacement body is formed with an insertion groove into which the long body large diameter portion is inserted,
A slit extending to the insertion groove is formed on the side wall of the door-side displacement body,
The elevator door opening travel protection device according to any one of claims 2 to 5, wherein a dimension in the width direction of the slit is smaller than a dimension in the radial direction of the large-diameter portion of the long body.

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