JP2011251793A - Elevator apparatus with emergency stop device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator apparatus with an emergency stop device capable of securing a safety distance between a car ceiling and a hoistway ceiling without extending the hoistway upward, and preventing the upward movement of an elevator body during maintenance and inspection without newly installing a dedicated holding device to an elevator body.SOLUTION: In the elevator apparatus including the emergency stop devices 9A, 9B disposed opposite guide rails 3A, 3B at a lower part of an elevator body (4), a wedge holding mechanism is provided in the emergency stop devices 9A, 9B. The wedge holding mechanism increases pinching force of wedges 17A, 17B by the force during the upward movement of the elevator body (4) when the wedges 17A, 17B pinch the guide rails 3A, 3B during maintenance and inspection. Accordingly, the upward movement of the elevator body (4) is prevented, and a dedicated elevator body holding device is not required. The safety distance between the elevator body and a hoistway ceiling is secured without extending the hoistway upward.

Description

  The present invention relates to a lifting device such as an elevator or a luggage lifting device, and more particularly, to a lifting device in which an elevator body such as an elevator car or a carriage of a luggage lifting device is provided with an emergency stop device.

  For example, in an elevator, when a device installed in a hoistway is inspected and maintained, maintenance personnel use the car as a work table and perform maintenance work on the ceiling of the car. Particularly in an elevator in which a hoisting machine is installed in a hoistway, there is a risk that the braking force of the brake cannot be secured during maintenance of the brake of the hoisting machine and the car is raised. If the car rises during maintenance inspection, the maintenance staff may hit the head against the ceiling of the hoistway or beams installed on the ceiling.

  Therefore, in order to ensure the safety of maintenance personnel, means for fixing the car in the maintenance position is required. As a device for fixing the car in the maintenance position, as disclosed in Patent Document 1, a technique for installing a large holding device on the ceiling of the car has already been proposed.

  According to the holding device disclosed in Patent Document 1, the wedge block of the holding device installed on the ceiling of the car can be sandwiched between the guide rail and the upward movement of the car can be prevented. Safety can be ensured.

JP 2009-67493 A

  The holding device disclosed in Patent Document 1 is installed on the car ceiling for exclusive use in preventing upward movement. Therefore, there is a possibility that a safety distance between the car ceiling and the hoistway ceiling cannot be secured by installing such a large holding device on the car ceiling. In order to ensure a safe distance between the car ceiling and the hoistway ceiling, there is a problem that the hoistway must be extended upward. Further, even if the holding device is detachably installed, the holding device must be attached and detached every time maintenance and inspection is performed, and there is a problem that extra time is spent on the setup work.

  The object of the present invention is not to be able to secure a safe distance between the car ceiling and the hoistway ceiling without extending the hoistway upward, and to eliminate the need for attaching or detaching a dedicated holding device to the hoisting body. An object of the present invention is to provide an elevating device provided with an emergency stop device that can prevent upward movement of the elevating body during maintenance inspection.

  In order to achieve the above object, according to the present invention, in an elevating apparatus provided with an emergency stop device installed on the elevating body facing the guide rail, a wedge clamps the guide rail in the emergency stop device during maintenance inspection. In some cases, a wedge holding mechanism is provided that increases the pinching force of the wedge by the force when the lifting body moves upward.

  In this way, since the upward movement of the lifting body can be prevented by using the wedge of the emergency stop device, it is not necessary to newly install a dedicated holding device on the lifting body, and the emergency stop device is located at the lower part of the lifting body. Therefore, a safety distance between the car ceiling and the hoistway ceiling can be secured without extending the hoistway upward.

As described above, according to the present invention, a safety distance between the car ceiling and the hoistway ceiling can be secured without extending the hoistway upward, and a dedicated holding device is provided for the hoisting body. There is no need to attach or detach, and it is possible to obtain a lifting device provided with an emergency stop device that can prevent the lifting body from moving upward during maintenance inspection.

Sectional drawing which shows a wedge holding mechanism when the wedge in the safety device according to the first embodiment of the present invention is separated from the guide rail. Sectional drawing which shows a wedge holding mechanism when the wedge in the emergency stop apparatus by the 1st Embodiment of this invention has pinched the guide rail. Sectional drawing which shows the wedge holding mechanism when releasing the wedge in the safety device by the 1st Embodiment of this invention from a guide rail. The whole expanded perspective view which looked at the wedge holding mechanism in the emergency stop apparatus by the 1st Embodiment of this invention from the guide rail side. The perspective view which shows the action | operation apparatus of the emergency stop apparatus shown in FIG. Schematic which shows an elevator as a raising / lowering apparatus provided with the emergency stop apparatus by this invention. The cross-sectional view which shows the relationship of the operation | movement at the time of the non-braking of the emergency stop apparatus and wedge holding mechanism shown in FIG. The cross-sectional view which shows the relationship of the operation | movement at the time of the braking of the emergency stop apparatus and wedge holding mechanism shown in FIG. FIG. 5A is a view corresponding to FIG. 5A showing the relationship between the operation of the emergency stop device according to the second embodiment of the present invention and the wedge holding mechanism during non-braking. FIG. 5B is a view corresponding to FIG. 5B showing the relationship between the operation of the emergency stop device and the wedge holding mechanism during braking according to the second embodiment of the present invention.

  Hereinafter, a first embodiment of an elevating device provided with an emergency stop device according to the present invention will be described by taking an elevator shown in FIGS. 1A to 5B as an example.

  In general, as shown in FIG. 4, the elevator 1 includes a pair of guide rails 3 </ b> A and 3 </ b> B erected in a hoistway 2, and a car 4 that is a lifting body that is guided by the guide rails 3 </ b> A and 3 </ b> B. And one end fixed to the ceiling of the hoistway 2 and suspended upwardly via sheaves 4A and 4B pivotally supported on the bottom of the car and installed at the top of the hoistway A main rope 7 having the other end that is wound around the driving sheave 5A of the upper machine 5 and droops again, and is wound around the sheave 6B of the counterweight 6 and fixed to the ceiling portion of the hoistway 2; Yes. Although the counterweight 6 is also guided by a dedicated guide rail, the illustration is omitted.

  The hoisting machine 5 is provided with a brake 5B and an encoder 5C coaxially with the driving sheave 5A. In the vicinity of the hoisting machine 5, a control panel 8 for controlling the operation of the entire elevator is installed.

  In addition, emergency stop devices 9A and 9B are installed at positions facing the pair of guide rails 3A and 3B in the lower part of the car 4.

  The elevator 1 configured as described above takes a signal from the encoder 5C into the control panel 8 to control the raising / lowering speed and position of the car 4, and instructs the operation of the brake 5B and the emergency stop devices 9A and 9B.

  By the way, the emergency stop devices 9A and 9B have a first frame 10 fixed to the car 4, as shown in FIG. The first frame 10 includes an upper frame 10A, a lower frame 10B, and left and right side frames 10C and 10D.

  As shown in FIG. 1, engaging pins 11A and 11B that linearly advance and retreat in the horizontal direction so as to sandwich the guide rails 3A and 3B are supported at positions facing the lower portions of the left and right side frames 10C and 10D. Pin holes 12A and 12B are cut away. The engaging pins 11A and 11B are both an engaging body and a wedge holding mechanism, and are pressed toward the guide rails 3A and 3B by pressing springs 13A and 13B provided at the bottoms of the pin holes 12A and 12B. The engaging pins 11A and 11B may be installed only on either the left or right side.

  Further, as shown in FIG. 2, guide members 14A and 14B are provided at positions above the left and right side frames 10C and 10D at positions facing the wide surfaces 3S on both sides of the guide rails 3A and 3B. The guide members 14A and 14B are formed of strength members 15A and 15B having tapered surfaces that become narrower as the distance from the wide surface 3S increases, and the wedges 17A and 15B cover the ends of the strength members 15A and 15B. Guide plates 16A and 16B are provided to prevent 17B from falling off.

  The wedges 17A and 17B are first braking bodies and are mounted between the taper surfaces of the strength members 15A and 15B and the wide surfaces 2S and 3S of the guide rails 3A and 3B. And a braking surface on the side facing the wide surfaces 2S, 3S. Wedges 17A and 17B mounted between the tapered surfaces of the strength members 15A and 15B and the wide surfaces 3S of the guide rails 3A and 3B are guided by the guide members 14A and 14B so as to be movable in the vertical direction.

  On the other hand, the wedges 17A and 17B are supported by receiving seats 18A and 18B facing the guide rails 3A and 3B with a gap below.

  And the said seats 18A and 18B are supported by the 2nd frame 19 installed in the downward direction, as shown in FIG.

  The second frame 19 is arranged below the inside of the first frame 10 and is composed of an upper frame 19A, a lower frame 19B, and left and right side frames 19C and 19D, and the vertical frame shown in FIG. The shaft 20 supports the first frame 10 so as to be movable only in the vertical direction.

  In the second frame body 19, a pair of sandwiching arms 21 </ b> A and 21 </ b> B supported by the longitudinal axis 20 is located. One side of the pinching arms 21A, 21B is extended so as to sandwich the wide surface 3S of the guide rails 3A, 3B, and braking shoes 22A, 22B are mounted on the opposing portions to the wide surface 3S. Abutting plates 23A and 23B are mounted on the opposite sides of the clamping arms 21A and 21B from the braking shoes 22A and 22B. The pinching arms 21A and 21B, the brake shoes 22A and 22B, and the contact plates 23A and 23B are a pinching member and a second braking body. Further, the other side of the pinching arms 21A, 21B is extended to the opposite guide rail side, and a compression spring 24 for pressing the brake shoes 22A, 22B against the guide rails 3A, 3B is provided at the extended end portion as a guide pin 25. It is loosely fitted and supported. In addition, a drive mechanism 26 is provided in the vicinity of the compression spring 24 so as to straddle the pinching arms 21A and 21B. The drive mechanism 26 includes an electromagnetic coil 26A fixed to the pinching arm 21B, and a plunger 26B connected to the pinching arm 21A via a plunger guide 26C and penetrating the electromagnetic coil 26A and the pinching arm 21B. ing. The operation of the drive mechanism 26 compresses the compression spring 24 to separate the braking shoes 22A and 22B of the pinching arms 21A and 21B from the guide rails 3A and 3B.

  In addition, as shown in FIG. 1, compression springs 27A and 27B are interposed between the strength members 15A and 15B and the side frames 10C and 10D. The strength members 15A and 15B are guide rails 3A and 3B. It is guided by fixed shafts 28A and 28B fixed to the side frames 10C and 10D so as to be displaceable in a direction perpendicular to the wide surface 3S.

  Further, as shown in FIG. 1C, the outer surfaces of the seats 18A and 18B and the outer surfaces of the contact plates 23A and 23B separate the braking shoes 22A and 22B from the guide rails 3A and 3B by the operation of the drive mechanism 26. When this is done, it is configured so that the flush surfaces or the outer surfaces of the contact plates 23A and 23B are located outside the outer surfaces of the seats 18A and 18B.

  When the elevator 1 is operated, in other words, when the car 4 is raised or lowered, it is essential that the engaging pins 11A and 11B are in contact with the outer surfaces of the seats 18A and 18B.

  In order to confirm the protruding state of the engagement pins 11A and 11B, as shown in FIG. 5, switches 29A and 29B are installed at the bottoms of the pin holes 12A and 12B, and the engagement of the contact plates 23A and 23B. Pressure switches 30A and 30B may be provided at the contact positions with the pins 11A and 11B so that a signal change due to the normal projection of the engaging pins 11A and 11B may be transmitted to the control panel 8.

  Next, an emergency stop operation when the car 4 equipped with the emergency stop devices 9A and 9B having the above-described configuration descends exceeding the rated speed will be described.

  When the car 4 is moved up and down at the rated speed, the emergency stop devices 9A and 9B do not operate, and the electromagnetic coil 26A of the drive mechanism 26 is excited as shown in FIGS. 1 (A) and 5 (A). Against the compression spring 24, the plunger 26B is adsorbed in the direction of arrow A in FIG. Therefore, the braking shoes 22A and 22B of the pinching arms 21A and 21B are separated from the guide rails 3A and 3B. At the same time, the wedges 17A and 17B are also separated from the guide rails 3A and 3B. At this time, the engaging pins 11A and 11B are in contact with the outer surfaces of the seats 18A and 18B.

  If an abnormal situation occurs during the raising / lowering of the car 4 at such a rated speed, a signal is transmitted to the drive mechanism 26 by an emergency stop command from the control panel 8, and the electromagnetic coil 26A of the drive mechanism 26 is excited. It will be solved. As a result, as shown by the arrow B in FIG. 5B, the clamping arms 21A and 21B are displaced by the repulsive force of the compression spring 24, and the braking shoes 22A and 22B operate as shown by the arrow C in FIG. As shown in FIG. 1B, the guide rails 3A and 3B are clamped.

  The brake shoes 22A, 22B remain in place due to the clamping pressure of the guide rails 3A, 3B by the brake shoes 22A, 22B, but the car 4 continues to descend, so the first frame 10 integrated with the car 4 is also Move down. As a result, the wedges 17A and 17B supported by the receiving seats 18A and 18B by the clamping arms 21A and 21B are lifted upward, and the wedges 17A and 17B move upward along the tapered surfaces of the strength members 15A and 15B. The guide rails 3A and 3B are mounted between the wide surfaces 2S and 3S so as to sandwich the guide rails 3A and 3B as shown by an arrow D in FIG. 3, and the first frame 10 and the car 4 and beyond. Emergency stop the descent.

  On the other hand, at the time of maintenance inspection, when attempting to perform maintenance inspection of equipment installed on the ceiling of the car 4 in the hoistway 2, for example, the brake 5B of the hoisting machine 5, the car 4 is first maintained. It is moved to a position and stopped, and then the excitation of the electromagnetic coil 26A is released by an instruction from the control panel 8. When the excitation is released, the compression arms 24 cause the clamping arms 21A and 21B to clamp the brake shoes 22A and 22B against the guide rails 3A and 3B as shown in FIG. 1A and FIG. 5B. Due to the clamping pressure of the guide rails 3A and 3B by the brake shoes 22A and 22B, the second frame body 19 including the clamping arms 21A and 21B is fixed to the guide rails 3A and 3B.

  In this state, the hoisting machine 5 is driven by an instruction from the control panel 8 to move the car 4 downward. As a result, the wedges 17A and 17B supported by the clamping arms 21A and 21B via the receiving seats 18A and 18B are moved relatively upward in the same manner as the operation at the time of emergency stop, so that the strength members 15A and 15B It is attached between the tapered surface and the wide surfaces 2S, 3S of the guide rails 3A, 3B. And it can fix with respect to the downward movement or the downward load of the car 4.

  Here, as shown in FIG. 1B, the wedges 17A and 17B provide sufficient holding force between the tapered surfaces of the strength members 15A and 15B and the wide surfaces 2S and 3S of the guide rails 3A and 3B. As shown in FIG. 1A, the engagement pins 11A and 11B that have been in contact with the seats 18A and 18B are inserted into the clamping arm 21A as shown in FIG. 1B. , 21B move relatively on the contact plates 23A, 23B. At this time, the engaging pins 11A and 11B are arranged so that a gap is formed between the bottom surfaces of the receiving seats 18A and 18B so that the engaging pins 11A and 11B move reliably.

  As a result, when an upward load is applied to the car 4 for some reason, the pin 11A and 11B are engaged with the bottom surfaces of the seats 18A and 18B after moving by the gap, and the wedges 17A and 17B are engaged. Since the relative position with respect to the first frame 10 is fixed in a state where the clamping force capable of fixing the car 4 is maintained, the upward movement of the car 4 is prevented. Accordingly, the maintenance staff can safely work because the car 4 does not move up and down unexpectedly.

  Next, when the maintenance inspection is finished and the car 4 is returned to the normal operation state, the hoisting machine 5 is driven according to an instruction from the control panel 8 and a downward load is applied to the car 4 for inching. Let Thereby, a clearance gap arises between engagement pin 11A, 11B and the bottom face of seat 18A, 18B.

  In this state, when the electromagnetic coil 26A is excited by an instruction from the control panel 8, the plunger 26B is attracted toward the pinching arm 21B as shown by an arrow A in FIG. As shown, the outer surfaces of the contact plates 23A and 23B are flush with the outer surfaces of the seats 18A and 18B.

  When the car 4 is raised in this state, the support pins 18A and 18B are released from the support of the engaging pins 11A and 11B, so that the wedges 17A and 17B and the receiving seats 18A and 18B are caused by their own weight. 3 and the wedges 17A and 17B move downward along the tapered surfaces of the strength members 15A and 15B and simultaneously move in the direction of arrow E in FIG. At that time, the engaging pins 11A, 11B move to the outer surface side of the seats 18A, 18B by the lowering of the seats 18A, 18B, and return to their original positions as shown in FIG. Thus, the car 4 fixed to the guide rails 3A and 3B can be opened for maintenance and inspection.

  Incidentally, in the present embodiment, as shown by broken lines in FIG. 5, the seats 18A and 18B and the engaging pins 11A and 11B are arranged in the vertical projection plane of the guide members 14A and 14B including the wedges 17A and 17B. Thus, as shown in FIG. 1B, the upward load of the car 4 can be efficiently transmitted to the wedges 17A and 17B.

  As described above, according to the present embodiment, during maintenance and inspection, the wedges 17A and 17B of the emergency stop devices 9A and 9B can be used to prevent the car 4 from moving upward. There is no need to newly install in the car 4, and the emergency stop devices 9A and 9B are installed in the lower part of the car 4, so that the elevator 4 can be lifted and lowered without extending the hoistway 2 upward. A safe distance from the ceiling of the road 2 can be ensured.

  Next, a second embodiment of the lifting device provided with the safety device according to the present invention will be described with reference to FIGS. 6 (A) and 6 (B). Note that the same reference numerals as those in FIG. 5 indicate the same components, and thus detailed description thereof is omitted.

  In the present embodiment, the configuration different from that in FIG. 5 is that in FIG. 5, instead of the engaging pins 11A and 11B that linearly advance and retract, L-shaped link pins 31A and 31B that rotate in the lateral direction and advance and retract. Was used.

  The link pins 31A and 31B are rotatably supported at one end of the L shape on the side frames 10C and 10D of the first frame 10 by the support shafts 32A and 32B, and the other end of the L shape is applied. It is the structure comprised so that it may contact | abut to plate 23A, 23B and the receiving seat (not shown) (receiving seat 18A, 18B of FIG. 1) by press spring 13A, 13B.

  In the above configuration, only the contact form of the link pins 31A and 31B is different. The emergency stop operation of the car by the emergency stop device, and the car fixing and releasing operation at the time of maintenance and inspection are the same as those in the first embodiment. The same.

  In this way, by using the link pins 31A and 31B that rotate from the engaging pins that linearly advance and retract as the members that engage the bottom of the seat, a large load acts on the link pins 31A and 31B. Can also reduce the astringency.

  In the above description, the elevator is described as an example of the lifting device provided with the emergency stop device. However, the present invention is not limited to the elevator, and is also applied to the luggage lifting device provided with the emergency stop device on the carrier. be able to.

  DESCRIPTION OF SYMBOLS 1 ... Elevator, 2 ... Hoistway, 3A, 3B ... Guide rail, 4 ... Riding car, 5 ... Hoisting machine, 5A ... Drive sheave, 5B ... Brake, 5C ... Encoder, 7 ... Main rope, 8 ... Control panel , 9A, 9B ... Emergency stop device, 10 ... First frame, 10A ... Upper frame, 10B ... Lower frame, 10C, 10D ... Side frame, 11A, 11B ... Engagement pin, 12A, 12B ... Pin hole, 13A , 13B ... pressure spring, 14A, 14B ... guide member, 15A, 15B ... strength member, 16A, 16B ... guide plate, 17A, 17B ... wedge, 18A, 18B ... seat, 19 ... second frame, 19A ... Upper frame, 19B ... lower frame, 19C, 19D ... side frame, 20 ... vertical axis, 21A, 21B ... clamping arm, 22A, 22B ... braking shoe, 23A, 23B ... hitting plate, 24 ... compression spring, 25 ... guide Pin 26 ... Drive mechanism 26A ... Electromagnetic coupling Le, 26B ... plunger, 26C ... plunger guide, 27A, 27B ... compression spring, 28A, 28B ... fixed shaft, 29A, 29B ... switch, 30A, 30B ... pressure switch, 31A, 31B ... link pin.

Claims (8)

  A lifting body that moves up and down in the hoistway along the guide rail, a main rope that suspends the lifting body, a hoisting machine that drives by driving the main rope, and a lower part of the lifting body that is provided in an emergency state In the lifting device provided with an emergency stop device having a wedge for clamping the guide rail to stop the downward movement of the lifting body, the wedge clamps the guide rail during maintenance in the emergency stop device A lifting device provided with an emergency stop device, characterized in that a wedge holding mechanism for holding the device is provided.   The emergency stop device is configured to clamp the guide rail by an emergency stop signal, and the clamping member is configured to displace the wedge to a position to clamp the guide rail by further lowering the lifting body. 2. The lifting apparatus with an emergency stop device according to claim 1, wherein the wedge holding mechanism is an engaging body that fixes the wedge at a position where the wedge clamps the guide rail.   A lifting body that moves up and down in the hoistway along the guide rail, a main rope that suspends the lifting body, a hoisting machine that drives by driving the main rope, and a lower part of the lifting body that is provided in an emergency state In the lifting device having an emergency stop device having a wedge for clamping the guide rail to stop the downward movement of the lifting body, the guide rail is clamped by the wedge in the emergency stop device during maintenance inspection. An engagement body that protrudes so as to be in direct contact with the bottom surface of the wedge and engages with the wedge is provided, and the engagement body is configured to retract to a position where the engagement with the wedge is released at the end of maintenance inspection. A lifting device provided with an emergency stop device.   A lifting body that moves up and down in the hoistway along the guide rail, a main rope that suspends the lifting body, and a hoisting machine that drives by driving the main rope, provided at a lower portion of the lifting body, A first braking body that clamps the guide rail and stops the downward movement of the lifting body when a lowering speed of the lifting body exceeds a specified value; and a seat that supports the first braking body; And a second pressure member that is provided in the lifting body and clamps the guide rail to be displaced relative to the lifting body and moves the first braking body to the clamping position of the guide rail via the seat. In the lifting device provided with the emergency stop device having the braking body, the outer surface of the seat is normally contacted from the side in the emergency stop device, and the second brake body causes the guide rail to contact the guide rail during maintenance inspection. The upward phase of the seat when pinched The displacement moves to the bottom surface side of the seat, contacts the bottom surface of the seat and the outer surface of the second braking body from the lateral direction of the second braking body, and holds the first braking body in the clamping position. An engagement body that is fixed to the lift is provided, and when there is an upward load on the lifting body during maintenance inspection, the engagement body presses the first braking body upward via the seat and stops the lifting body. A lifting device provided with an emergency stop device.   The lifting device with an emergency stop device according to claim 4, wherein the engaging body is an engaging pin that linearly advances and retreats in a lateral direction.   5. The lifting device with an emergency stop device according to claim 4, wherein the engaging body is an L-shaped link pin that rotates in a lateral direction about a support shaft and advances and retreats.   The lifting device with an emergency stop device according to claim 4, wherein the engaging body is installed at a position overlapping with a vertical projection surface of the first braking body.   When the lifting body of the lifting device provided with the safety device according to claim 4, 5, 6 or 7 is fixed to the guide rail at the time of maintenance, the second braking body in a state where the lifting body is stationary. The guide rail is clamped, and then the car is moved downward to relatively displace the first braking body to clamp the first braking body, and during normal operation, The engaging body that is in contact with the outer surface of the seat is brought into contact with the outer surface of the second braking body below the seat by relative displacement, and the lifting body is unfixed from the guide rail when maintenance inspection is completed. At this time, by releasing the clamping pressure of the second brake body on the guide rail, the outer surface of the second brake body is positioned flush with the outer surface of the seat or outside the outer surface of the seat. , The first braking body and The seat is moved downward by its own weight to release the clamping pressure on the guide rail by the first braking body, and in this state, the lifting body is moved upward to move the engaging body to the outer surface side of the seat. A method of fixing and releasing the lifting body at the time of maintenance and inspection of the lifting device provided with the safety device.

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