JP2007238225A - Emergency stop device and elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency stop device independently provided in an elevator car not receiving a load from a guide device. <P>SOLUTION: The emergency stop device is provided with wedges 11 and 12, wedge receivers 21 and 22, guide rods 41 and plate springs (elastic members) 51. The wedges 11 and 12 are arranged to be paired on both sides of a rail 200 so as to pinch the rail 200. The wedge receivers 21 and 22 are provided to be paired on both sides of the rail 200 to form a shape going around from the outside of the wedges 11 and 12 to the side of the arrangement line of the rail 200 and the wedges 11 and 12. The guide rod 41 connect the pair of wedge receivers 21 and 22 freely to move in parallel with the direction in which the wedges 11 and 12 pinch the rail 200 on the side of the arrangement line of the rail 200 and the wedges 11 and 12. The plate spring 51 are arranged on the side of the arrangement line of the rail 200 and the wedges 11 and 12 to energize the wedge receivers 21 and 22 provided to be paired so as to pinch the rail 200. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an emergency stop device mounted on an elevator car or a counterweight, and an elevator including the same.

  The elevator board is equipped with an emergency stop device that operates when the elevator descends at a speed higher than a preset speed and stops the boarding. This emergency stop device is attached to the lower side of the lower beam of the riding rod, and has a pair of wedges arranged so as to sandwich the rail, a wedge holder that supports the wedge, and a biasing force in a direction in which the wedge is pressed against the rail. An elastic member for generating the elastic member and a bracket for receiving the elastic member. A disc spring or a leaf spring is used as the elastic member.

  The wedge, wedge receiver, elastic member, and bracket are arranged in a line in a direction orthogonal to the direction in which the rail extends, and are arranged in a mirror image with the rail as the center. In the case of an emergency stop device using a leaf spring, the leaf spring is formed in a U shape in which both end portions bypass the rail and wrap around the outside of the wedge receiver.

  However, in the case of the emergency stop device having the above-described configuration, since a wedge, a wedge support, an elastic member, and a bracket are arranged on both sides of the rail, a wide width is required. When a U-shaped leaf spring is used, a necessary and sufficient braking force is required for the maximum loading load and maximum operating speed of the riding board. Therefore, a U-shaped leaf spring molded to a size suitable for the elevator specifications. Must be prepared.

  Moreover, the guide device provided on the lower side of the riding rod is attached to the lower side of the emergency stop device. Therefore, high rigidity is required for the lower beam where the emergency stop device is fixed in order to receive a load applied to the ride by the rolling of the earthquake. In this case, a load is also applied to the emergency stop device.

  The larger the rider, the larger the emergency stop device that can be attached to the rider. As a result, since the distance from the riding rod to the guide device becomes larger, the moment applied to the lower beam to which the guide device and the emergency stop device are fixed also increases. In order to be able to withstand the load applied to the ride, it is necessary to provide reinforcement to the lower beam and to increase the material rigidity of the lower beam itself.

  To increase the strength of the lower beam and its surroundings, use a high-strength material, increase the thickness of the material, or provide additional reinforcement. In either case, the weight of the riding rod is increased, which is not preferable. Further, since the guide device is attached to the emergency stop device, the emergency stop device itself needs to have unnecessary rigidity.

  Therefore, the present invention provides an emergency stop device that can be provided independently on the elevator car without receiving a load from the guide device, and an elevator including the same.

  The emergency stop device according to the present invention is premised on being mounted on an elevator board or a counterweight. The emergency stop device includes a wedge, a wedge receiver, a guide rod, and an elastic member. A wedge is arrange | positioned at a pair which pinches | interposes the rail installed along the hoistway of an elevator. The wedge receiver is provided in a pair having a shape that wraps around from the outside of the wedge to the side of the row in which the rail and the wedge are arranged in the direction of sandwiching the rail. The guide rod couples the wedge receivers in a pair so as to be movable parallel to the direction in which the wedges sandwich the rails on the side of the row where the rails and wedges are arranged. The elastic member is disposed on the side of the row in which the rails and the wedges are arranged, and biases the wedge receivers provided in a pair so as to sandwich the rails.

  In this case, the safety device further includes end pieces that respectively hold both ends of the guide rod, and the elastic member is disposed between the end piece and the wedge receiver along the guide rod. Alternatively, an elastic member is disposed between the ends of the wedge receivers that receive one wedge and extend to the position where the side of the row where the rails and the wedges are aligned extends to the other side of the rail.

  It is also preferable to arrange a plurality of rolling elements between the wedge and the wedge receiver. Moreover, it is also preferable to apply the disc spring extrapolated by the guide rod as an elastic member. A wedge receiver is housed inside a hollow lower beam provided at the lower part of the elevator board.

  In the elevator according to the present invention, the above-described emergency stop device is housed in the lower part of the elevator board, and the guide device is attached to the lower beam.

  In the emergency stop device according to the present invention, the elastic member urges the wedge receiver in the direction of sandwiching the rails at the position where the rails and the wedges are lined up to the side. Therefore, the dimensions of the safety device can be reduced in the direction in which the rail is sandwiched. As a result, the wedge holder of the emergency stop device can be accommodated in the hollow lower beam provided at the lower part of the elevator board.

  Since the emergency stop device is housed inside the lower beam, the emergency stop device does not receive a load input due to an earthquake roll or the like through the guide device. Since it is not necessary to consider the load received from the outside, the emergency stop device can be reduced in size and weight. In addition, since the guide device can be arranged at a position close to the riding board, the rigidity required for supporting the guide device is reduced. Therefore, since the structure of the part can be simplified and reduced in weight, not only can the dimensions of the elevator car itself be reduced in the vertical direction, but also the weight can be reduced.

  An emergency stop device according to a first embodiment of the present invention will be described with reference to FIGS. The emergency stop device 10 is provided at both ends 102 of the lower beam 101 provided at the lower part of the elevator board 100. The lower beam 101 is arranged in a direction connecting the rails 200 installed in the elevator hoistway. As shown in FIG. 2, the lower beam 101 has a hat-shaped cross-sectional shape, and a flange 103 that extends laterally extends along the bottom portion 104 of the riding rod 100. As a result, a space S surrounded by the lower beam 101 is formed between the bottom portion 104 of the riding rod 100 and the lower beam 101. The emergency stop device 10 is accommodated inside the space S.

  As shown in FIG. 1, the riding rod 100 includes a guide device 105 on the lower surface that is the outside of the end portion 102 of the lower beam 101. The guide device 105 includes three guide rollers 106, 107, and 108, respectively. One guide roller 106 is in rolling contact with the mutually facing surfaces of the rails 200 arranged in a pair. The remaining two guide rollers 107 and 108 are arranged with the rail 200 interposed therebetween.

  As shown in FIG. 3, the emergency stop device 10 includes wedges 11 and 12, wedge receivers 21 and 22, rolling elements 31, a guide rod 41, a disc spring 51, an end piece 61, and an upper support plate 62. The lower support plate 63 is provided. The wedges 11 and 12 are arranged in a pair with the rail 200 interposed therebetween, and a brake shoe is attached to the friction surfaces 11 a and 12 a with the rail 200. The wedges 11 and 12 are formed thick in a direction in which the lower side is separated from the rail 200.

  The wedge receivers 21, 22 are arranged outside the wedges 11, 12 along the direction sandwiching the rail 200, and wrap around in a direction approaching the rail 200 to the side of the row where the rails 200 and the wedges 11, 12 are aligned, Spring receiving portions 21a and 22a extending in a direction away from the rail 200 along the lower beam 101 are provided. The rolling element 31 is a cylindrical roller and is disposed between the wedges 11 and 12 and the wedge receivers 21 and 22 as shown in FIG. Is provided in order to reduce the resistance at the time of extending the wire diagonally toward the rail 200.

  When the sliding resistance between the wedges 11 and 12 and the wedge receivers 21 and 22 is sufficiently small, the rolling element 31 may not be provided. Further, the rolling elements 31 are connected to each other by a retainer so as not to cause the rolling elements 31 to collide with each other and to prevent the rolling elements 31 coming off between the wedges 11 and 12 and the wedge receivers 21 and 22 from dropping. It is also preferable.

  On the side surfaces 11b and 12b of the wedges 11 and 12, ridges 11c and 12c are formed along the direction in which the wedges 11 and 12 move. Engagement plates 23 and 24 are attached to the side surfaces 21b and 22b of the wedge receivers 21 and 22 facing the rail 200 side. The edges 23a and 24a of the engagement plates 23 and 24 extending toward the wedges 11 and 12 are engaged so as to hold the ridges 11c and 12c provided on the wedges 11 and 12, respectively. Grooves 21d and 22d for guiding the other ridges 11c and 12c of the wedges 11 and 12 are provided on the inner side surfaces 21c and 22c of the wedge receivers 21 and 22 facing the side surfaces 11b and 12b of the wedges 11 and 12, respectively. Yes.

  The guide rod 41 is disposed on the side of the row where the rail 200 and the wedges 11 and 12 are arranged so as to pass through the spring receiving portions 21 a and 22 a of the wedge receivers 21 and 22, and the wedges 11 and 12 sandwich the rail 200. A pair of wedge receivers 21 and 22 are coupled so as to be movable in parallel. A pair of guide rods 41 are arranged side by side in the vertical direction, and both end portions 42 are respectively held by end pieces 61.

  The disc spring 51 is an example of an elastic member arranged on the side of the row in which the rails 200 and the wedges 11 and 12 are arranged, and a plurality of disc springs 51 are attached to the guide rod 41 between the spring receiving portions 21 a and 22 a and the end piece 61. Extrapolated. As shown in FIGS. 3 and 5, in the present embodiment, the disc springs 51 are mounted in a series of two or more stages that are stacked in parallel. Further, the disc spring 51 can freely set the pressing force of the wedges 11 and 12 against the rail 200 by changing the overlapping and combination, so that the emergency stop device is set to the optimum condition according to the specifications of the elevator. It is easy to set 10 braking forces.

  The disc spring 51 may be superposed and combined as long as a necessary restraining force for the wedges 11 and 12 to grip the rail 200 is obtained. Therefore, the disc spring 51 is not limited to the above combination, and may be appropriately selected based on the required load and stroke. The superposition and combination are selected.

  The upper support plate 62 and the lower support plate 63 are arranged in a direction orthogonal to the rail 200, and a portion through which the rail 200 passes is cut out. The upper support plate 62 is applied to the wedge receivers 21 and 22 from the upper side, and the lower support plate 63 is applied to the wedge receivers 21 and 22 from the lower side. The upper support plate 62 and the lower support plate 63 are connected and fixed by an end piece 61. Stoppers 25 are formed on the upper and lower surfaces of the wedge receivers 21 and 22, respectively. The stopper 25 is fitted into recesses 62 a and 63 a provided on the upper support plate 62 and the lower support plate 63 from the outside across the rail 200.

  The emergency stop device 10 configured as described above is lowered to a position where the wedges 11 and 12 abut against the lower support plate 63 in the standby state shown in FIGS. 4 and 5. The wedge receivers 21 and 22 are urged in a direction to sandwich the rail 200 by the disc spring 51, and are held in a state in which the stopper 25 is locked to the recesses 62a and 63a of the upper support plate 62 and the lower support plate 63.

  When the rider 100 descends at a speed higher than the set speed, the governor provided in the elevator operates. The governor is linked to a pulling lever connected to each wedge 11, 12. When the pulling lever is operated, the wedges 11 and 12 are lifted obliquely in the direction of sandwiching the rail 200 along the wedge receivers 21 and 22 as shown in FIGS. When the wedges 11 and 12 come into contact with the rail 200 and a frictional force is generated between the wedges 11 and 12 and the rail 200, the wedges 11 and 12 are further lifted. As a result, the wedge receivers 21 and 22 are pushed out and a gripping force is generated by the disc spring 51, so that the falling riding rod 100 is decelerated and eventually stops.

  The emergency stop device 10 is disposed inside the space S surrounded by the lower beam 101 of the riding rod 100, and the guide device 105 is directly attached to the lower surface of the lower beam 101. Therefore, when a roll is caused by an earthquake, the force received by the guide device 105 from the rail 200 is applied to the lower beam and is not transmitted to the emergency stop device 10.

  In addition, since the emergency stop device 10 is housed inside the lower beam 101, the distance from the guide rollers 106, 107, and 108 of the guide device 105 to the lower beam 101 is shortened. Accordingly, the moment applied to the base portion of the guide device 105 and the lower beam 101 is reduced, and thus a strength member is not necessary for these portions. That is, by reducing or simplifying the plate thickness of these members, the weight of the riding rod 100 itself can be reduced.

  An emergency stop device 10A according to a second embodiment of the present invention will be described with reference to FIGS. The components having the same functions as those of the emergency stop device 10 of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The emergency stop device 10 </ b> A shown in FIG. 8 is housed inside the space S formed by the lower beam 101.

  As shown in FIG. 9, the safety device 10 includes wedges 11 and 12, wedge receivers 21 and 22, rolling elements 31, a guide rod 41, and a disc spring 51. The emergency stop device 10A in the present embodiment is different in the shapes of the wedge receivers 21 and 22, and does not require the end piece 61, the upper support plate 62, and the lower support plate 63 in the first embodiment.

  As shown in FIG. 9, the wedge receivers 21 and 22 are divided into wedge holding blocks 211 and 221 and spring holding blocks 212 and 222. The wedge holding blocks 211 and 221 are fitted with engagement plates 23 and 24 on both side surfaces. The engagement plates 23 and 24 hold the wedges 11 and 12 by holding the protrusions 11c and 12c of the wedges 11 and 12, respectively.

  The spring holding blocks 212 and 222 are provided in the same shape, and are arranged point-symmetrically around an axis extending in a direction along the lower beam 101 with respect to the rail 200. The spring holding blocks 212 and 222 wrap around to the side of the row in which the rails 200 and the wedges 11 and 12 are arranged from one side receiving the wedges 11 along the row in which the rails 200 and the wedges 11 and 12 are arranged. To the other side beyond the rail 200.

  In the present embodiment, the spring holding block 212 extends along the upper side of the guide rod 41, and the spring holding block 222 extends along the lower side of the guide rod 41. Spring receiving portions 212a and 222a are provided at end portions of the spring holding blocks 212 and 222, respectively, extending to the other side. As shown in FIG. 11, the spring receiving part 212a sandwiches the disc spring 51 between a pair of spring receiving parts 222a provided as a counterpart.

  Further, as shown in FIGS. 9 and 10, the spring holding blocks 212 and 222 have stoppers 213 and 223 that support the wedge holding blocks 211 and 221 from the outside in a direction in which the rail 200 is sandwiched. The stoppers 213 and 223 and the wedge holding blocks 211 and 221 may be joined by welding, or may be joined by press-fitting pins made in an interference fit together.

  The stopper 213 of the spring holding block 212 rises along the direction in which the rail 200 extends outside the spring receiving portion 222a in the direction in which the rail 200 is sandwiched. The stopper 223 rises along the direction in which the rail 200 extends outside the spring receiving portion 212a in the direction in which the rail 200 is sandwiched.

  In a state where the spring receiving portion 212a is in contact with the stopper 223 and the spring receiving portion 222a is in contact with the stopper 213, the disc spring 51 is compressed and inserted between the spring receiving portions 212a and 222a. A state in which a preload for grasping the rail 200 between the two is applied can be obtained. As shown in FIGS. 10 and 11, the preload can be further adjusted by tightening the bolts 214 and 224 into the stoppers 213 and 223 from the outside of the lower beam 101. By adjusting the tightening amounts of the bolts 214 and 224, the emergency stop device 10A can be centered with respect to the rail 200.

  The guide rods 41 are arranged side by side in the direction along the lower beam 101. The guide rod 41 is passed from the stopper 213 of the wedge receiver 21 to the stopper 223 of the wedge receiver 22. One guide rod 41 is fitted to the stopper 213, and the other guide rod 41 is fitted to the stopper 223. ing. The guide rod 41 may move freely without being fitted to any of the stoppers 213 and 223. In this case, however, a pin or the like is provided to prevent the stoppers 213 and 223 from coming off.

  The spring receiving portions 212a and 222a are formed in a rectangular waveform. The stepped recesses 212b and 222b are inserted into the guide rod 41, and are further fitted to key blocks provided at the bases of the stoppers 213 and 223 of the counterpart wedge receivers 21 and 22, respectively. Since the spring receiving portions 212a and 222a are formed in this way, the emergency stop device 10A can be easily assembled, and the wedge receivers 21 and 22 act on each other while the wedges 11 and 12 are held in a cantilever manner. Torsion can be maintained.

  In the emergency stop device 10A configured as described above, in the standby state shown in FIGS. 10 and 11, the wedges 11 and 12 are held substantially flush with the lower surfaces of the wedge receivers 21 and 22 by a lifting lever (not shown). ing. The wedge receivers 21 and 22 are pulled in a direction to open with respect to the rail 200 by bolts 214 and 224, and a biasing force is applied in a direction to sandwich the rail 200 by the disc spring 51.

  When the rider 100 descends at a speed higher than the set speed, the governor provided in the elevator operates. The governor is linked to a pulling lever connected to each wedge 11, 12. When the pulling lever is operated, the wedges 11 and 12 are lifted obliquely so as to sandwich the rail 200 along the wedge receivers 21 and 22 as shown in FIGS. When the wedges 11 and 12 come into contact with the rail and a frictional force acts between the wedges 11 and 12 and the rail 200, the wedges 11 and 12 are further raised. As a result, the wedge receivers 21 and 22 are pushed away in a direction away from the rail 200. Since the gripping force is generated by the disc spring 51 mounted between the wedge receivers 21 and 22, the riding rod 100 is decelerated and eventually stops.

  In the present embodiment, the disc springs 51 that bias the wedge receivers 21 and 22 in the direction of sandwiching the rail 200 are not provided individually for each wedge receiver 21 and 22 but are provided together. Therefore, even if the disc spring 51 has a variation in bending or elastic force due to a manufacturing error, the wedges 11 and 12 strike the rail 200 evenly.

  The safety device 10A described in the first embodiment and the safety device 10A described in the second embodiment are suitable for mounting on a counterweight because of its simple configuration. Further, since the disc spring 51 is applied as an elastic member, the braking force of the emergency stop devices 10 and 10A that grip the rail 200 with the wedges 11 and 12 can be changed by appropriately changing the number of disc springs 51 to be inserted and the direction in which the disc springs 51 are overlapped. Can be adjusted easily. Therefore, it is possible to provide an emergency stop device having the ability to meet the specifications of each elevator.

  Further, a disc spring 51 serving as an elastic member is disposed on the side of the row in which the rail 200 and the wedges 11 and 12 are arranged. As a result, the dimensions of the emergency stop devices 10 and 10A can be reduced in the direction in which the rail 200 is sandwiched, and the emergency stop devices 10 and 10a can be easily stored in the space S surrounded by the lower beam 101 of the riding rod 100.

The perspective view which looked at the riding board of the elevator provided with the safety device of 1st Embodiment which concerns on this invention from the downward direction. The perspective view which looked at the emergency stop apparatus with which the elevator shown in FIG. 1 was equipped from the rail side. The disassembled perspective view which looked at the emergency stop apparatus shown in FIG. 2 from the passenger side. Sectional drawing of the standby state of the emergency stop apparatus shown along the F4-F4 line | wire in FIG. Sectional drawing of the standby state of the emergency stop apparatus shown along the F5-F5 line | wire in FIG. Sectional drawing which shows the state which the emergency stop apparatus shown in FIG. 4 act | operated. Sectional drawing of the operation state of the emergency stop apparatus shown along the F7-F7 line | wire in FIG. The perspective view which looked at the safety device of 2nd Embodiment which concerns on this invention from the rail side. The disassembled perspective view of the safety device shown in FIG. Sectional drawing of the standby state of the emergency stop apparatus shown along F10-F10 line | wire in FIG. Sectional drawing of the standby state of the emergency stop apparatus shown along the F11-F11 line | wire in FIG. Sectional drawing which shows the state which the emergency stop apparatus shown in FIG. 10 act | operated. Sectional drawing of the operation state of the emergency stop apparatus shown along F13-F13 line | wire in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,10A ... Emergency stop device 11,12 ... Wedge, 21a, 22a ... Wedge receiver, 31 ... Rolling element, 41 ... Guide rod, 51 ... Belleville spring, 61 ... End piece, 100 ... Riding rod, 101 ... Lower beam 105 ... Guide device, 200 ... Rail, S ... Space.

Claims (7)

A pair of wedges arranged between the rails installed along the elevator hoistway,
A wedge receiver provided in a pair having a shape that wraps around from the outside of the wedge to the side of the row in which the rail and the wedge are arranged in a direction sandwiching the rail;
A guide rod for connecting the wedge receiver in a pair so that the wedge is movable in parallel with a direction in which the wedge is sandwiched between the rail and the row of wedges;
An emergency stop device comprising: an elastic member arranged on a side of a row in which the rails and the wedges are arranged and biasing the wedge receivers provided in a pair so as to sandwich the rails. And further comprising end pieces each holding both ends of the guide rod,
The emergency stop device according to claim 1, wherein the elastic member is disposed between the end piece and the wedge receiver along the guide rod.   The elastic member is disposed between the ends of the wedge receivers that receive one of the wedges and extend to the position beyond the rail and the side where the wedges are arranged to the other side of the rail. The emergency stop device according to claim 1.   The emergency stop device according to any one of claims 1 to 3, wherein a plurality of rolling elements are arranged between the wedge and the wedge receiver.   The emergency stop device according to any one of claims 1 to 3, wherein the elastic member is a disc spring externally inserted into the guide rod.   The emergency stop device according to any one of claims 1 to 3, wherein the wedge receiver is housed in an inner space surrounded by a lower beam provided at a lower part of the elevator board. Rails installed along the elevator hoistway;
Norikura moving in the hoistway;
A lower beam provided at a lower part of the riding rod toward a direction in which the rail is located at an end, and a pair of wedges arranged between the rails;
A wedge receiver provided in a pair having a shape that is housed inside the lower beam and wraps around from the outside of the wedge to the side of the row in which the rail and the wedge are arranged in a direction sandwiching the rail;
A guide rod for connecting the wedge receiver to a pair so that the wedge is movable in parallel with a direction in which the wedge is sandwiched between the rail and the row of wedges;
An elastic member that is arranged on a side of the row in which the rails and the wedges are arranged and biases the wedge receivers provided in a pair so as to sandwich the rails;
An elevator comprising: a guide device that is fixed to the lower beam and guides the riding along the rail.

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