JP2008195521A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device provided with a rope brake device not requiring installation of a deflector wheel in which a machine room is made high or a hoistway must be lengthened, and capable of obtaining sufficient braking force without applying bending load to a main rope. <P>SOLUTION: The elevator device is provided with a sheave 3 having a plurality of rope grooves formed with predetermined intervals; a plurality of main ropes 4 wound on the rope grooves respectively; a lifting body fixed with the plurality of main ropes with wider intervals than the intervals of the rope grooves; a pressing mechanism 17 arranged between the sheave 3 and the lifting body so as to clamp the plurality of main ropes 4 and pushing out at least one to the plurality of main ropes 4 side at emergency; and a movable lining slidably installed on the pressing mechanism 17, always engaged with every main rope 4 for varying a track by a position of a lifting step of the lifting body to follow to the motion of the main rope 4, and retaining the main rope 4 at emergency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator apparatus including a rope brake that can decelerate, stop, and hold a car in an emergency such as an overspeed.

  As a rope brake device for a conventional elevator system, the main purpose is to prevent the counterweight combined with the main rope from colliding with the shock absorber at the bottom of the hoistway at high speed in the event of an elevator emergency. One that holds a rope has been proposed. In general, in an elevator, a plurality of main ropes connecting a car and a counterweight are arranged via a sheave driven by a driving device, and are fixed to the car or the counterweight with respect to the distance between the main ropes in the sheave. The main rope spacing is different. For this reason, the trajectory of the main rope is shifted between when the car or counterweight is located on the upper floor and when it is located on the lower floor, and when the rope brake device is installed, it is a flat lining with a large area. It was difficult to obtain a sufficient frictional force because the material had to be used.

  Therefore, in order not to change the trajectory of the distance between the main ropes, a rope brake device is arranged between the sheave and the deflecting wheel, and braking is performed at a portion where the main rope arrangement does not change (for example, a patent) Reference 1).

  As another method, in order to forcibly correct the distance between the main ropes, the rope brake device is operated by providing a guide roller having a central diameter smaller than the end diameter corresponding to each main rope. The guide roller is used to forcibly change the trajectory of the main rope by pressing the main rope, and a rope groove is formed and the opposing pressing material can be pressed by matching the position of the rope groove. (For example, refer to Patent Document 2).

JP 2003-155174 A Japanese Patent Laid-Open No. 2003-300681

  However, since the thing of patent document 1 requires the space which installs a deflecting vehicle, there existed a problem that the machine room had to be made high or the hoistway had to be lengthened.

  Moreover, since the thing of patent document 2 applies a bending load to a main rope, there existed a problem that the main rope was damaged or abrasion of a guide roller was accelerated | stimulated.

  The present invention has been made to solve the above-described problems, and its purpose is not to install a baffle that requires a machine room to be elevated or a hoistway to be lengthened. It is an object of the present invention to provide an elevator apparatus including a rope brake device that can obtain a sufficient braking force without applying a bending load.

  The elevator according to the present invention includes a sheave having a plurality of rope grooves formed at predetermined intervals, a plurality of main ropes wound around the rope grooves, and the plurality of ropes at an interval wider than the interval between the rope grooves. An elevating body to which a main rope is fixed, a pressing mechanism that is arranged so as to sandwich the plurality of main ropes between the sheave and the elevating body, and at least one of them is pushed out to the side of the plurality of main ropes in an emergency. It is slidably installed on the pressing mechanism and always engages with each main rope that changes its locus according to the position of the lifting / lowering process of the lifting body to follow the movement of the main rope and hold the main rope in an emergency. It is equipped with a movable lining.

  The present invention includes a sheave having a plurality of rope grooves formed at a predetermined interval, a plurality of main ropes wound around the rope grooves, and the plurality of main ropes at an interval wider than the interval between the rope grooves. A fixed lifting mechanism, a pressing mechanism that is arranged so as to sandwich the plurality of main ropes between the sheave and the lifting body, and at least one of them is pushed to the plurality of main ropes in an emergency, and the pressing mechanism A movable lining that is slidably mounted on each of the main ropes that constantly changes the locus according to the position of the lifting process of the lifting body and follows the movement of the main rope to hold the main rope in an emergency. With this configuration, it is possible to realize a rope brake device that can obtain a sufficient braking force without requiring a baffle and without applying a bending load to the main rope.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is an overall configuration diagram of an elevator apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a longitudinal sectional view taken along line AA of FIG. 1, and is a front view of the rope brake apparatus according to Embodiment 1 of the present invention. 3 is a longitudinal sectional view of a main part of the rope brake device according to the first embodiment of the present invention. FIG. 4 is a transverse sectional view taken along the line BB in FIG. 3, and the rope brake according to the first embodiment of the present invention. FIG. 5 is a longitudinal sectional view taken along the line CC of FIG. 3, showing the engagement of the guide and both side movable linings according to the first embodiment of the present invention, and FIG. FIG. 7 is a longitudinal sectional view showing the trajectory of the main rope for explaining the operation of the rope brake device according to the first embodiment of the invention, and FIG. 7 is a side view of the main part of FIG. Guide and movable lining on both sides Is a diagram showing the engagement. 1, 2, 4, and 6, the case where the counterweight is at the uppermost end is shown by a solid line, and the main rope, the counterweight, and the both-side movable lining when the counterweight is at the lowermost end are shown. Shown with a chain line.

  In FIG. 1, an elevator car 5 and a counterweight 6 are connected to both ends of a plurality of main ropes 4 respectively wound around a plurality of rope grooves of a sheave 3 of a hoist 2 installed in a machine room 1. Has been. The car 5 and the counterweight 6 are moved up and down in opposite directions, and stopped at a predetermined position by stopping the sheave 3 with the brake 7. As shown in FIG. 2, the main rope 4 is fixed to the upper portion of the counterweight 6 via the connector 8, the compression spring 9, and the nut 10 at an interval wider than the interval between the rope grooves of the sheave 3. Among the main ropes 4, the both side main ropes 4 b are configured to change the trajectory according to the position of the lifting / lowering process of the counterweight 6.

  Reference numeral 11 denotes a pulley 13 that is wound around a wire rope 12 connected to the car 5 and rotates, and a speed detector that detects the speed of the car 5 by detecting the rotational speed of the pulley 13. A terminal position detector 15 is installed corresponding to the terminal floor and detects that the car 5 is located near the terminal floor, and 16 is configured to sandwich the plurality of main ropes 4 between the sheave 3 and the counterweight 6. 1 is a rope brake device disposed on the upper surface of the floor of the machine room 1. In an emergency when it is determined that the car 5 is positioned near the terminal floor by the terminal position detectors 14 and 15 and the speed detected by the speed detector 11 is determined to be greater than or equal to a predetermined value, the rope At least one of the pressing mechanisms 17 of the brake device 16 is pushed out to the main rope 4 side, and the car 5 and the counterweight 6 are controlled to be stopped by holding the plurality of main ropes 4.

  Next, the rope brake device 16 will be described in detail with reference to FIGS. A pair of cylinders 18 made of a magnetic material constituting the pressing mechanism 17 of the rope brake device 16 has a rectangular flange facing the main rope 4 side, and a leg provided on both sides of the lower edge of the cylinder 18 on the floor of the machine room 1. It is fixed. A cylindrical electromagnetic coil 19 is housed inside the cylinder portion of the cylinder 18 on the main rope 4 side, while a disk-shaped movable iron piece 20 is housed inside the opening formed on the opposite side of the main rope 4. The opening is closed with a lid 21 made of a non-magnetic material. In addition, a plunger 22 is fixed to the center of the movable iron piece 20 and loosely penetrates the air core of the electromagnetic coil 19 and a through hole formed in the rectangular flange and the lid 21 with substantially the same diameter as the air core. A movable plate 23 is fixed to the end of the main rope 4 such that the end surfaces of the main rope 4 are opposed to each other. In addition, a pair of connecting rods 24 pass through both rectangular flanges of the cylinder 18 and the center of both edges of the movable plate 23, and are fixed to both rectangular flanges of the cylinder 18 by a nut 25 and a lock nut 26. Yes. These connecting rods 24 also penetrate a compression spring 27 disposed between the end surfaces of the movable plates 23 on the main rope 4 side.

  Further, at the center of the end surface of the movable rope 23 on the main rope 4 side, it protrudes toward the central main rope 4a side where the trajectory does not change depending on the position of the lifting / lowering process of the counterweight 6, and follows the movement of the central main rope 4a in an emergency. Instead, a vertically long central lining 28 for holding the central main rope 4a is provided integrally or separately. These central linings 28 have a length in the extending direction of the central main rope 4a formed in the longitudinal direction so as to generate a predetermined friction braking force on one central main rope 4a, and the central main rope 4a. A rope holding groove is formed on the opposing surface along the central main rope 4a. Further, on the upper and lower portions of the both ends of the movable rope 23 on the main rope 4 side, there are convex portions that are formed in an arc shape centering on the main rope 4 feeding portion of the sheave 3 and project to the main rope 4 side. A guide 29 made of an oil-containing resin material or the like having a lubricating performance is fixed. A plurality of vertically long movable linings 30 for holding both side main ropes 4b are arranged on these convex portions so as to be opposed to each side main ropes 4b whose trajectory is changed depending on the position of the lifting / lowering process of the counterweight 6. , And is slidably engaged with the recess formed by the groove. Similar to the central lining 28, these two movable linings 30 have a length in the extending direction of the two main ropes 4b, and rope holding grooves are formed on the opposite surfaces of the two main ropes 4b. A plurality of guide rollers 32a and 32b are attached to the upper and lower ends of the both-side movable linings 30 via curved attachments 31a and 31b having a curved portion so as not to interfere with each other. These guide rollers 32a and 32b are always engaged with the main ropes 4b on both sides by rope engaging grooves formed on the outer peripheral surface thereof.

  Next, operation | movement of the rope brake apparatus 16 is demonstrated in detail using FIG. In FIG. 6, the distance between the rope grooves of the sheave 3 is P1, while the distance at which the main rope 4 of the counterweight 6 is fixed is necessarily P2, which is larger than P1. Since the distance between the rope grooves of the sheave 3 and the distance at which the main rope 4 of the counterweight 6 is fixed are different, the locus of the central main rope 4a changes between when the counterweight 6 is at the uppermost end and when it is at the lowermost end. However, the trajectory of the both-side main rope 4b changes.

  That is, when the counterweight 6 is at the uppermost end, the both-side main ropes 4b are inclined by an angle θ1 in the direction away from the center main rope 4a. At this time, the both-side movable lining 30 also always slides with respect to the guide 29 so as to follow the inclination of the both-side main rope 4b together with the respective guide rollers 32a and 32b engaged with the outer peripheral surface of the both-side main rope 4b. As a result, it is inclined by θ1 in the direction in which the lower part is separated. In this state, when an emergency occurs, the electromagnetic coil 19 of the rope brake device 16 is excited, and the movable iron piece 20 is attracted to the electromagnetic coil 19 against the restoring force of the compression spring. As a result, the central lining 28 and the both-side movable lining 30 are pushed out to the main rope 4 side through the plunger 22 and the movable plate 23, and the central main rope 4 a and the both-side main ropes from the rope holding grooves of the central lining 28 and the both-side movable lining 30. 4b is reliably braked and held. At this time, the guide rollers 32a and 32b move rearward relative to the movable linings 30 while elastically deforming the attachments 31a and 31b, and are engaged with the main ropes 4b by the rope engaging grooves. Maintaining the match. Thereafter, a predetermined inspection is performed, the electromagnetic coil 19 is demagnetized, and the holding force of the central main rope 4a and the both side main ropes 4b is released by the restoring force of the compression spring 27. At this time, each guide roller 32a, 32b releases the elastic deformation of each attachment metal 31a, 31b, and maintains the engagement with the both-side main rope 4b by the rope engagement groove. On the other hand, when the counterweight 6 is at the lowermost end, the both-side main ropes 4b are inclined by θ2 smaller than the angle θ1 in the direction in which the lower side is separated from the central main rope 4a. Also in this case, the both-side movable lining 30 operates as described above. That is, the both-side movable lining 30 is always engaged via the guide rollers 32a and 32b for each side main rope 4b whose locus is changed depending on the position of the lifting / lowering process of the counterweight 6, and follows the movement of the side main rope 4b. In the emergency, both main ropes 4b are braked and held.

  According to the first embodiment described above, the both-side movable lining 30 follows the movement of the both-side main rope 4b and holds the both-side main rope 4b in an emergency. Therefore, the rope brake device 16 is always operated during the operation. The both side main ropes 4b can be easily braked and held with a high frictional force. Further, guide rollers 32a, 32b and the like are not necessary for the central main rope 4a whose trajectory is not changed depending on the position of the lifting / lowering process of the counterweight 6, and the manufacturing cost of the rope brake device 16 can be suppressed. Further, there is no need for a deflecting wheel for aligning the main ropes 4, and there is no need to make the machine room 1 taller or lengthen the hoistway. Furthermore, since the load which forcibly changes the locus | trajectory of the main rope 4 is not applied at the time of braking of the main rope 4, damage to the main rope 4 can be prevented. In addition, the compression spring 27 may be comprised with other elastic bodies, such as rubber | gum, and the upper and lower guides 29 may be only any one.

Embodiment 2. FIG.
8 is a longitudinal sectional view of a main part of a rope brake device according to Embodiment 2 of the present invention, and FIG. 9 is a transverse sectional view taken along line DD of FIG. 8, and the rope brake device according to Embodiment 2 of the present invention. FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the first embodiment, the central lining 28, the guide 29, the both-side movable lining 30, the attachment metal 31a, 31b, and the guide rollers 32a, 32b are provided on both of the pressing mechanisms 17, but in the second embodiment, the pressing mechanism A central lining 28, a guide 29, both-side movable lining 30, an attachment metal 31 a, and a guide roller 32 a are provided on only one of the 17. On the other side of the pressing mechanism 17, a movable plate 33 not provided with the central lining 28 is fixed to the main rope 4 side end of the plunger 22. On the surface of the movable plate 33 facing the main rope 4, there is provided a fixed lining 34 that has a smooth rope holding surface that faces the entire locus of all the main ropes 4 and does not follow the movement of the main rope 4. In other respects, the configuration is the same as that of the first embodiment. In this case, in an emergency, the central main rope 4 a and the both side main ropes 4 b are connected to the central lining 28 of one movable plate 23 of the pressing mechanism 17 and the rope holding grooves of the both side movable linings 30 and the other fixed lining 34 of the pressing mechanism 17. It is braked and held between the rope holding surfaces.

  According to the second embodiment described above, in addition to the same effects as in the first embodiment, the other side of the pressing mechanism 17 does not require the both-side movable lining 30 and the like, and the function of braking and holding the main rope 4 It is possible to simplify the component configuration, reduce the manufacturing and installation costs without sacrificing the cost.

Embodiment 3 FIG.
10 is a front view of a rope brake device according to Embodiment 3 of the present invention, FIG. 11 is a longitudinal sectional view of a main part of the rope brake device according to Embodiment 3 of the present invention, and FIG. 12 is a longitudinal section taken along line EE in FIG. It is a top view, Comprising: It is a figure which shows engagement of the guide and both-sides movable lining in Embodiment 3 of this invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the first embodiment, the upper and lower portions of both sides of the main rope 4 side end face of the movable plate 23 are formed in an arc shape centering on the main rope 4 feeding portion of the sheave 3 and projecting toward the main rope 4 side. A guide 29 provided with a portion is fixed, and both side movable linings 30 are slidably engaged with these convex portions in the concave portions. On the other hand, in the third embodiment, a guide 36 having a convex portion that extends linearly in the horizontal direction and protrudes to the main rope 4 side is integrated or separated only on the upper portions of both end portions on the main rope 4 side of the movable plate 35. The two side movable linings 37 are slidably engaged with these convex portions by a concave portion 37a formed higher than the height of the convex portion of the guide 36. In other respects, the configuration is the same as that of the first embodiment. In this case, the movable linings 37 on both sides are supported while the edge of the upper side of the concave portion 37a on the side of the central lining 28 is in contact with the upper surface of the guide 36, and the movement in the vertical direction is limited, and follow the movement of the main ropes 4b on both sides. become.

  According to the third embodiment described above, in addition to the same effects as those of the first embodiment, the guide 36 can be easily manufactured linearly, and the manufacturing cost can be reduced.

Embodiment 4 FIG.
FIG. 13 is a cross-sectional view of the main part of the rope brake device for an elevator according to Embodiment 4 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the fourth embodiment, the configuration of the pressing mechanism 17 is different from that of the first embodiment. That is, in the center of the cylinder 38, the plunger 39 is loosely passed, and the electromagnetic coil 40 is disposed on the main rope 4 side. A movable plate 23 similar to that of the first embodiment is fixed to the end of the plunger 39 on the main rope 4 side. In addition, a pair of compression springs 41 are disposed between the opposed surfaces of the movable plate 23 and the cylinder 38 and partly housed in a recess formed on the center side of the electromagnetic coil 40 on the main rope 4 side end surface of the cylinder 38. ing. Further, a central lining 28, a guide 29, both-side movable linings 30, mounting brackets 31a and 31b (not shown in FIG. 13), guide rollers 32a and 32b (not shown in FIG. 13) provided on these movable plates 23. ) Is the same as in the first embodiment. In this case, contrary to the first embodiment, in the normal time, the holding of the main rope 4 is released by exciting the electromagnetic coil 40, while in the emergency, the electromagnetic coil 40 is demagnetized. The main rope 4 is held.

  According to the fourth embodiment described above, the same effect as in the first embodiment can be obtained.

  In the first to fourth embodiments, the rope brake device 16 is installed between the sheave 3 and the counterweight 6, but the rope brake device 16 is installed between the sheave 3 and the car 5. It goes without saying that the same effect can be obtained by holding a plurality of main ropes 4. The pressing mechanism 17 may be an operating mechanism using air pressure, hydraulic pressure, or the like, in addition to the electromagnet mechanism using the electromagnetic coil 19.

1 is an overall configuration diagram of an elevator elevator apparatus according to Embodiment 1 of the present invention. It is a longitudinal cross-sectional view in the AA line of FIG. 1, Comprising: It is a front view of the rope brake device in Embodiment 1 of this invention. It is a principal part longitudinal cross-sectional view of the rope brake device in Embodiment 1 of this invention. FIG. 4 is a cross-sectional view taken along line BB in FIG. 3, and is a cross-sectional view of a main part of the rope brake device according to Embodiment 1 of the present invention. It is a longitudinal cross-sectional view in CC line of FIG. 3, Comprising: It is a figure which shows engagement of the guide and both-sides movable lining in Embodiment 1 of this invention. It is the longitudinal cross-sectional view which showed the locus | trajectory of the main rope for demonstrating operation | movement of the rope brake device in Embodiment 1 of this invention. It is a principal part side view of FIG. 6, Comprising: It is a figure which shows engagement of the guide and both-sides movable lining in Embodiment 1 of this invention. It is a principal part longitudinal cross-sectional view of the rope brake device in Embodiment 2 of this invention. It is a cross-sectional view in the DD line of FIG. 8, Comprising: It is a principal part cross-sectional view of the rope brake apparatus in Embodiment 2 of this invention. It is a front view of the rope brake device in Embodiment 3 of this invention. It is a principal part longitudinal cross-section of the rope brake device in Embodiment 3 of this invention. It is a longitudinal cross-sectional view in the EE line of FIG. 11, Comprising: It is a figure which shows engagement of the guide and both-sides movable lining in Embodiment 3 of this invention. It is a principal part cross-sectional view of the rope brake device of the elevator in Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine room 2 Hoisting machine 3 Sheave 4 Main rope 4a Central main rope 4b Both side main rope 5 Car 6 Balance weight 7 Trigger 8 Connecting tool 9 Compression spring 10 Nut 11 Speed detector 12 Wire rope 13 Pulleys 14 and 15 Termination Position detector 16 Rope brake device 17 Press mechanism 18 Cylinder 19 Electromagnetic coil 20 Movable iron piece 21 Lid 22 Plunger 23 Movable plate 24 Connecting rod 25 Nut 26 Lock nut 27 Compression spring 28 Central lining 29 Guide 30 Both-side movable linings 31a and 31b Mounting bracket 32a, 32b Guide roller 33 Movable plate 34 Fixed lining 35 Movable plate 36 Guide 37 Both sides movable lining 37a Recess 38 Cylinder 39 Plunger 40 Electromagnetic coil 41 Compression spring

Claims (9)

A sheave having a plurality of rope grooves formed at predetermined intervals;
A plurality of main ropes respectively wound around the rope grooves;
A lifting body to which the plurality of main ropes are fixed at an interval wider than an interval between the plurality of rope grooves;
A pressing mechanism that is arranged so as to sandwich the plurality of main ropes between the sheave and the lifting body, and at least one is pushed out to the plurality of main ropes in an emergency;
It is slidably installed on the pressing mechanism and always engages with each main rope that changes its locus according to the position of the lifting / lowering process of the lifting body to follow the movement of the main rope and hold the main rope in an emergency. Movable lining,
An elevator apparatus comprising: A sheave having a plurality of rope grooves formed at predetermined intervals;
A plurality of main ropes respectively wound around the rope grooves;
A lifting body to which the plurality of main ropes are fixed at an interval wider than an interval between the plurality of rope grooves;
A pressing mechanism that is arranged so as to sandwich the plurality of main ropes between the sheave and the lifting body, and at least one is pushed out to the plurality of main ropes in an emergency;
A movable lining that is installed on one side of the pressing mechanism and that constantly engages each main rope that changes its trajectory depending on the position of the lifting / lowering process of the lifting body, follows the movement of the main rope, and holds the main rope in an emergency. When,
A fixed lining installed on the other side of the pressing mechanism and holding the main rope in an emergency without following the movement of the main rope;
An elevator apparatus comprising: The pressing mechanism in which the movable lining is installed includes a central lining that holds at least one central main rope that does not follow the movement of the main rope in an emergency and has little change in the trajectory due to the position of the lifting / lowering process of the lifting body,
The elevator apparatus according to claim 1, wherein the movable lining holds a main rope other than the central main rope in an emergency. The pressing mechanism on which the movable lining is installed includes a guide having lubrication performance,
The elevator apparatus according to claim 1, wherein the movable lining is slidably engaged with the guide. The guide has a convex part protruding to the main rope side,
The elevator apparatus according to any one of claims 1 to 4, wherein the movable lining is slidably engaged with the convex portion at the concave portion.   At least one of the movable lining, the fixed lining, and the center lining has a length in a tension direction of the main rope determined so as to generate a predetermined friction braking force. The elevator apparatus in any one of.   The elevator apparatus according to any one of claims 1 to 6, wherein at least one of the movable lining, the fixed lining, and the central lining is formed with a rope holding groove for holding the main rope in an emergency.   The elevator apparatus according to any one of claims 1 to 7, wherein the movable lining is always engaged with the main rope by a rope engaging groove of a guide roller attached to at least one of the upper and lower parts. The guide roller is fixed through a mounting bracket having a spring property, and in an emergency, the guide roller is moved relative to the movable lining while elastically deforming the mounting bracket to maintain the engagement with the main rope. The elevator apparatus in any one of Claims 1-8.

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