JP2017178515A - Brake system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake system that can readily extract a plunger.SOLUTION: The brake system 11 includes: a brake wheel 15; a brake shoe 17; a spring 22; and an electromagnetic plunger device 26, for instance. The electromagnetic plunger device 26 includes: a coil 30; the plunger 27 and a cylinder 31. The plunger 27 includes: a rod 34; and a body part 35. The rod 34 has one end part projecting from the cylinder. The body part 35 is detachably provided to the other end of the rod 34.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a brake device used in an elevator.

  Patent Literature 1 describes a brake device used in an elevator. In the brake device described in Patent Document 1, the brake lining is pressed against the brake wheel to prevent the drive sheave from rotating. In order to separate the brake lining from the brake wheel, an electric current is passed through the coil of the brake device to move the plunger.

Japanese Patent Laid-Open No. 6-200961

  In elevator maintenance, the plunger of the brake device is pulled out and the plunger is cleaned. The elevator brake device may be installed in a narrow space, and it may be difficult to pull out the plunger depending on the installation location.

  Moreover, the brake device described in patent document 1 moves two brake linings away from a brake wheel by moving one plunger. On the other hand, there exists a brake device provided with one plunger with respect to one brake lining. For example, the brake device is provided with two sets of brake linings and plungers.

  In recent years, from the viewpoint of improving the performance of the brake device, a work for repairing a brake device having only one plunger to a brake device having two plungers has been frequently performed. A brake device having two plungers is structurally higher in height than a brake device having only one plunger. If a space for pulling out the plunger cannot be secured between the brake device and the ceiling after the brake device is repaired, the height of the machine base that supports the brake device must be adjusted. The machine base is large and partly buried in a wall or ceiling. For this reason, a large amount of cost and labor were required for the renovation work.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide a brake device capable of easily pulling out a plunger.

  The brake device according to the present invention includes a rotating body that rotates in conjunction with an elevator drive sheave, an opposing member that faces the rotating body, an elastic body that generates a force for pressing the opposing member against the rotating body, An electromagnetic plunger device that generates a force for separating the member from the rotating body. The electromagnetic plunger device includes a coil, a plunger whose position changes depending on the presence or absence of a current flowing through the coil, and a cylinder that guides the movement of the plunger. The plunger includes a rod having one end protruding from the cylinder, and a main body provided detachably at the other end of the rod.

  A brake device according to the present invention includes a rotating body that rotates in conjunction with a drive sheave of an elevator, a first facing member and a second facing member that face the rotating body, and a pressure member that presses the first facing member against the rotating body. A first elastic body for generating a force, a first electromagnetic plunger device for generating a force for separating the first opposing member from the rotating body, and a second for generating a force for pressing the second opposing member against the rotating body. An elastic body, and a second electromagnetic plunger device that generates a force for separating the second opposing member from the rotating body. Each of the first electromagnetic plunger device and the second electromagnetic plunger device includes a coil, a plunger whose position changes depending on the presence or absence of a current flowing through the coil, and a cylinder that guides the movement of the plunger. The plunger includes a rod having one end protruding from the cylinder, and a main body provided detachably at the other end of the rod.

  With the brake device according to the present invention, the plunger can be easily pulled out.

It is a figure which shows the example of the elevator apparatus provided with the brake device in Embodiment 1 of this invention. It is a figure which shows the example of the brake device in Embodiment 1 of this invention. It is a figure which shows the cross section of an electromagnetic plunger apparatus. It is a figure which shows the example of a plunger. It is a figure for demonstrating the function of a cancellation | release part and a nail | claw part. It is a figure for demonstrating the function of a cancellation | release part and a nail | claw part. It is a perspective view which shows a main-body part. It is a figure for demonstrating the extraction operation | work of a plunger. It is a figure which compares a single brake device and a double brake device. It is a figure which shows the other example of a plunger. It is a figure which shows the other example of a plunger. It is a figure which shows the other example of a drawing assistance means. It is a figure which shows the other example of a drawing assistance means. It is a figure which shows the example of the plunger with which the brake device in Embodiment 2 of this invention was equipped. It is a figure which shows the example of the plunger with which the brake device in Embodiment 2 of this invention was equipped.

  The present invention will be described with reference to the accompanying drawings. The overlapping description will be simplified or omitted as appropriate. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
1 is a diagram illustrating an example of an elevator apparatus including a brake device according to Embodiment 1 of the present invention. The elevator apparatus shown in FIG. 1 includes a car 1 and a counterweight 2, for example. The car 1 moves up and down the hoistway 3. The counterweight 2 moves up and down the hoistway 3. The car 1 and the counterweight 2 are suspended from the hoistway 3 by the main rope 4. The roping method for suspending the car 1 and the counterweight 2 is not limited to the example shown in FIG.

  For example, a machine base 6 is provided in the machine room 5. The machine room 5 is, for example, a space above the hoistway 3. The machine base 6 is provided with a hoisting machine base 8 via a vibration isolator 7. The hoisting machine base 8 is provided with a hoisting machine 9, a gear device 10, and a brake device 11.

  The hoisting machine 9 includes, for example, a driving sheave 12 and an electric motor (not shown). The main rope 4 is wound around the drive sheave 12. The electric motor generates a driving force for rotating the driving sheave 12. Control of the electric motor, that is, rotation and stop of the drive sheave 12 are controlled by a control device (not shown). The control device is provided in the machine room 5, for example. When the drive sheave 12 rotates, the main rope 4 moves in a direction corresponding to the rotation direction of the drive sheave 12. The car 1 is raised or lowered depending on the direction in which the main rope 4 moves. The counterweight 2 moves in the direction opposite to the direction in which the car 1 moves.

  FIG. 1 shows an example in which the gear device 10 is a worm gear. The gear device 10 includes, for example, a worm wheel 13 and a worm 14. The worm wheel 13 is provided on a shaft on which the drive sheave 12 is provided. The worm wheel 13 rotates and stops together with the drive sheave 12. The worm 14 includes a gear that meshes with a gear formed on the worm wheel 13. The worm 14 rotates in conjunction with the rotation of the worm wheel 13. The worm 14 stops when the worm wheel 13 stops. In the example shown in the present embodiment, the worm 14 is the output shaft of the gear device 10. The output shaft of the gear device 10 may be another shaft interlocked with the worm 14.

  FIG. 1 shows an example in which an elevator apparatus includes a worm gear that converts rotation of a drive sheave 12 into rotation of an output shaft. The elevator apparatus may include another type of gear apparatus 10.

  FIG. 2 is a diagram illustrating an example of the brake device 11 according to the first embodiment of the present invention. FIG. 2 shows a part of the brake device 11. FIG. 2 is a view of the brake device 11 as viewed from the direction A in FIG. The brake device 11 includes, for example, a brake wheel 15, brake linings 16 and 19, brake shoes 17 and 20, brake arms 18 and 21, springs 22 and 23, levers 24 and 25, and electromagnetic plunger devices 26 and 28.

  The brake wheel 15 is provided on the worm 14. The brake wheel 15 rotates and stops together with the worm 14. That is, the brake wheel 15 rotates in conjunction with the rotation of the drive sheave 12. The brake wheel 15 stops when the drive sheave 12 stops. In the example shown in the present embodiment, the brake wheel 15 is a rotating body that rotates in conjunction with the drive sheave 12.

  The brake lining 16 faces the brake wheel 15. The brake lining 16 is pressed against the brake wheel 15 to prevent the drive sheave 12 from rotating. The brake lining 16 is provided on the brake shoe 17. The brake shoe 17 is provided on the brake arm 18. The lower end of the brake arm 18 is provided on a support member that supports the brake wheel 15 and the like via a pin. In the example shown in the present embodiment, the brake lining 16 is a first facing member that faces the rotating body. A brake pad or the like may be employed as the first opposing member.

  The brake lining 19 faces the brake wheel 15. The brake lining 19 is pressed against the brake wheel 15 to prevent the drive sheave 12 from rotating. The brake lining 19 is disposed so as to sandwich the brake wheel 15 from both sides by the brake lining 16. The brake lining 19 is provided on the brake shoe 20. The brake shoe 20 is provided on the brake arm 21. As for the brake arm 21, a lower end part is provided in a support member via a pin. In the example shown in the present embodiment, the brake lining 19 is a second facing member that faces the rotating body. A brake pad or the like may be employed as the second opposing member.

  The spring 22 generates a force for pressing the brake lining 16 against the brake wheel 15. That is, in the example shown in the present embodiment, the spring 22 is a first elastic body that generates a force for pressing the first opposing member against the rotating body. Note that the type of the first elastic body is not limited to the spring. The spring 22 presses the upper part of the brake arm 18 so that the brake arm 18 approaches the brake wheel 15, for example. The brake shoe 17 is provided at an intermediate portion of the brake arm 18. Therefore, the brake lining 16 is pressed against the brake wheel 15 with a force larger than the force with which the spring 22 presses the brake arm 18 according to the lever principle.

  The spring 23 generates a force for pressing the brake lining 19 against the brake wheel 15. That is, in the example shown in the present embodiment, the spring 23 is a second elastic body that generates a force for pressing the second opposing member against the rotating body. The type of the second elastic body is not limited to a spring. For example, the spring 23 presses the upper portion of the brake arm 21 so that the brake arm 21 approaches the brake wheel 15. The brake shoe 20 is provided at an intermediate portion of the brake arm 21. Therefore, the brake lining 19 is pressed against the brake wheel 15 with a force larger than the force with which the spring 23 presses the brake arm 21 according to the lever principle.

  The lever 24 is provided on the support member via a pin. Similarly, the lever 25 is provided on the support member via a pin.

  The electromagnetic plunger device 26 generates a force for separating the brake lining 16 from the brake wheel 15. That is, in the example shown in the present embodiment, the electromagnetic plunger device 26 is a first electromagnetic plunger device that generates a force for separating the first opposing member from the rotating body. The electromagnetic plunger device 26 includes, for example, a plunger 27. The tip of the plunger 27 contacts the lever 24. The electromagnetic plunger device 26 moves the lever 24 by displacing the plunger 27 to place the brake lining 16 at a position where it does not contact the brake wheel 15.

  The electromagnetic plunger device 28 generates a force for separating the brake lining 19 from the brake wheel 15. That is, in the example shown in the present embodiment, the electromagnetic plunger device 28 is a second electromagnetic plunger device that generates a force for separating the second opposing member from the rotating body. The electromagnetic plunger device 28 includes a plunger 29, for example. The tip of the plunger 29 contacts the lever 25. The electromagnetic plunger device 28 moves the lever 25 by displacing the plunger 29 to place the brake lining 19 at a position where it does not contact the brake wheel 15.

  FIG. 3 is a view showing a cross section of the electromagnetic plunger device 26. In addition to the plunger 27, the electromagnetic plunger device 26 includes, for example, a coil 30, a cylinder 31, a switch 32, and a case 33.

  The position of the plunger 27 changes depending on the presence or absence of a current flowing through the coil 30. If no current flows through the coil 30, the plunger 27 is arranged at the upper position via the lever 24 by the force of the spring 22. That is, if no current flows through the coil 30, the brake lining 16 is pressed against the brake wheel 15. When a current flows through the coil 30, the plunger 27 arranged at the upper position moves downward and is arranged at the lower position. The movement of the plunger 27 is guided by the cylinder 31. The lever 24 is moved by the displacement of the plunger 27, and the brake lining 16 is separated from the brake wheel 15. If current is flowing through the coil 30, the brake lining 16 does not contact the brake wheel 15. Whether the plunger 27 is arranged at the upper position or the lower position can be specified by a signal from the switch 32. Plunger 27, coil 30, cylinder 31 and switch 32 are supported by case 33. The switch 32 is not limited to the illustrated configuration, and any configuration may be used as long as the displacement of the plunger 27 to the upper position or the lower position can be detected.

  The configuration of the electromagnetic plunger device 28 is the same as the configuration of the electromagnetic plunger device 26. That is, the cross section of the electromagnetic plunger device 28 is the same as that shown in FIG. In addition to the plunger 29, the electromagnetic plunger device 28 includes, for example, a coil 30, a cylinder 31, a switch 32, and a case 33. A detailed description of the configuration of the electromagnetic plunger device 28 is omitted.

  FIG. 4 is a diagram illustrating an example of the plunger 27. The plunger 27 includes, for example, a rod 34, a main body portion 35, a release portion 36, a claw portion 37, an operation portion 38, a pressing plate 39, and a screw rod 40.

  The rod 34 has, for example, an elongated cylindrical shape. One end (tip) of the rod 34 protrudes from the cylinder 31. One end of the rod 34 contacts the lever 24. The main body 35 is a portion that is attracted by a magnetic field generated when the coil 30 is energized. The main body portion 35 has, for example, a cylindrical shape having a diameter larger than the diameter of the rod 34. The main body 35 is detachably provided at the other end of the rod 34.

  In order to make the main body 35 detachable from the rod 34, in the example shown in the present embodiment, the plunger 27 is provided with a release portion 36, a claw portion 37, and an operating portion 38. The release portion 36 is provided in a portion of the rod 34 that protrudes from the cylinder 31. That is, the release portion 36 is not covered by the cylinder 31 or the case 33 when the brake device 11 is performing a normal operation. When a release operation is performed on the release unit 36 at the time of maintenance or the like, the main body unit 35 becomes removable from the rod 34.

  5 and 6 are diagrams for explaining the functions of the release portion 36 and the claw portion 37. 5 and 6 show an example in which the release unit 36 is a button. When the release unit 36 is a button, the release operation for removing the main body unit 35 from the rod 34 is performed by pushing the release unit 36. FIG. 5 shows a state where the release operation is not performed on the release unit 36. In the state shown in FIG. 5, the release portion 36 is arranged so that the surface is flush with the surface of the rod 34, for example. When a release operation is performed on the release unit 36, the release unit 36 is pushed into the rod 34. In this state, the release portion 36 is disposed at a position that does not protrude from the surface of the rod 34. FIG. 6 shows a state where a release operation is performed on the release unit 36.

  The claw portion 37 is provided at the other end of the rod 34. As shown in FIG. 5, the claw portion 37 is disposed at a position protruding from the surface of the rod 34, for example, in a state where the release operation is not performed on the release portion 36. The operating part 38 has a mechanism for interlocking the claw part 37 with the releasing part 36. For example, when the release portion 36 is pushed in from the state shown in FIG. 5, the claw portion 37 moves so as to be pulled into the rod 34 by the function of the operating portion 38. That is, the claw portion 37 is arranged at a position where it does not protrude from the surface of the rod 34 as shown in FIG.

  FIG. 7 is a perspective view showing the main body 35. A mounting hole 35 a into which the other end of the rod 34 is inserted is formed in the main body 35. Further, the main body portion 35 is formed with a concave portion 35b in which the claw portion 37 is disposed on the inner wall forming the attachment hole 35a. When the other end portion of the rod 34 is inserted into the attachment hole 35a and the claw portion 37 is disposed in the recess 35b, the claw portion 37 is hooked on the edge forming the attachment hole 35a. Thereby, the rod 34 is fixed to the main body portion 35. Further, when a release operation is performed on the release portion 36, the claw portion 37 is disposed at a position where it does not protrude from the surface of the rod 34. Thereby, the rod 34 can be extracted from the main body portion 35.

  The presser plate 39 is fixed to the main body portion 35 by bolts 41. The presser plate 39 can be removed from the main body 35 by loosening the bolt 41. The screw rod 40 is screwed into a screw hole formed in the main body 35 at the tip, and is fixed using a nut 42. A part of the screw rod 40 protrudes from the presser plate 39.

  The configuration of the plunger 29 is the same as the configuration of the plunger 27. That is, the plunger 29 includes a rod 34, a main body portion 35, a release portion 36, a claw portion 37, an operating portion 38, a press plate 39, and a screw rod 40 as shown in FIGS. 4 to 7, for example. In the plunger 29, one end portion (tip portion) of the rod 34 protruding from the cylinder 31 contacts the lever 25. Specific descriptions regarding other configurations of the plunger 29 are omitted.

  With the brake device 11 having such a configuration, the maintenance staff can easily pull out the plunger 27 when performing maintenance of the brake device 11. FIG. 8 is a view for explaining the operation of pulling out the plunger 27. The maintenance staff can remove the main body portion 35 from the rod 34 by performing a release operation on the release portion 36 when the plunger 27 is pulled out. For this reason, even if the ceiling of the machine room 5 or the beam provided in the machine room 5 is approaching the electromagnetic plunger device 26, the plunger 27 can be easily pulled out. Similarly, the plunger 29 can be easily pulled out.

  FIG. 9 is a diagram comparing a single brake device and a double brake device. FIG. 9A shows a single brake device. A single brake device is a brake device provided with only one electromagnetic plunger device. In the single brake device, two brake linings are operated by one electromagnetic plunger device. FIG. 9B shows a double brake device. The double brake device is a brake device including two electromagnetic plunger devices like the brake device 11. In the double brake device, one brake lining is operated by one electromagnetic plunger device, and the other brake lining is operated by another electromagnetic plunger device.

  In the double brake device, for example, a space for arranging the two electromagnetic plunger devices is secured by increasing the position of the lever. For this reason, the position of the electromagnetic plunger device of the double brake device is higher than the position of the electromagnetic plunger device of the single brake device, as shown in FIG. From the viewpoint of improving the performance of the brake device, when the existing single brake device is replaced with a double brake device, it is effective to employ the brake device 11 as a newly installed double brake device.

  In addition, you may employ | adopt the electromagnetic plunger apparatus 26 provided with the plunger 27 for a single brake device. By adopting the electromagnetic plunger device 26, the plunger 27 can be pulled out easily. Moreover, a single brake device can be installed in a place where the ceiling or the like is low.

  10 and 11 are diagrams showing another example of the plunger 27. 10 and 11 show a cross section of the plunger 27. The plunger 27 shown in FIG. 10 further includes a lifting bar 43 and a spring 44 in addition to the configuration shown in FIG. In FIG. 10, some configurations of the operation unit 38 and the presser plate 39 are not illustrated.

  In the example shown in FIGS. 10 and 11, the rod 34 is formed with a hollow portion 34 a that opens at the other end. The lifting rod 43 and the spring 44 are disposed in the hollow portion 34a. The lifting rod 43 is disposed at a position closer to the opening of the hollow portion 34 a than the spring 44. The spring 44 presses the pulling rod 43 against the opening side of the hollow portion 34a.

  FIG. 11 shows a state where the main body 35 is detached from the rod 34. When the main body 35 is removed from the rod 34, a part of the lifting rod 43 jumps out of the rod 34 by the force of the spring 44.

  The maintenance staff performs a release operation on the release portion 36 when the brake device 11 is maintained, and removes the main body portion 35 from the rod 34. At this time, the rod 34 from which the main body portion 35 has been removed remains left inside the case 33. If the plunger 27 includes the lifting rod 43 and the spring 44, the maintenance staff can grasp the lifting rod 43 protruding from the rod 34 and pull out the rod 34.

  The pulling bar 43 and the spring 44 are an example of a pulling auxiliary means. The extraction assisting means is for facilitating the operation of extracting the rod 34 from which the main body portion 35 has been removed. The pulling assisting means is provided on the rod 34 so as to be exposed when the main body 35 is removed from the rod 34, for example. 12 and 13 are diagrams showing another example of the pulling assisting means. In the example shown in FIG. 12, a hook 45 is provided at the other end of the rod 34. The maintenance staff can pull out the rod 34 by hanging a string on the hook 45. In the example shown in FIG. 13, a magnet 46 is provided at the other end of the rod 34. The maintenance staff can pull out the rod 34 using a tool or the like whose tip is iron.

Embodiment 2. FIG.
14 and 15 are diagrams showing examples of plungers provided in the brake device 11 according to Embodiment 2 of the present invention. 14 and 15 show a part of the plunger 27. The brake device 11 in the present embodiment is different from the example in which the plunger 27 and the plunger 29 are shown in the first embodiment. The configuration of the elevator apparatus not described in detail in the present embodiment is the same as the configuration disclosed in the first embodiment. The configuration of the plunger 29 is the same as the configuration of the plunger 27. For this reason, in this Embodiment, the structure of the plunger 27 is demonstrated in detail, and description is abbreviate | omitted about the structure of the plunger 29. FIG.

  The plunger 27 in the present embodiment includes, for example, a rod 34, a main body portion 35, a first claw portion 47, a second claw portion 48, an operation portion 38, a press plate 39, a screw rod 40, and a cover 49. In FIG. 14 and FIG. 15, some configurations of the main body portion 35, the pressing plate 39, and the like are not illustrated.

  The rod 34 in the present embodiment has, for example, an elongated cylindrical shape. One end (tip) of the rod 34 protrudes from the cylinder 31. The main body 35 is detachably provided at the other end of the rod 34.

  In the example shown in the present embodiment, the plunger 27 is provided with a first claw portion 47, a second claw portion 48, an operating portion 38, and a cover 49 so that the main body portion 35 can be attached to and detached from the rod 34. The first claw portion 47 is provided at a portion of the rod 34 that protrudes from the cylinder 31. The 1st nail | claw part 47 can be arrange | positioned in the 1st position which protrudes from the surface of the rod 34, and the 2nd position which does not protrude from the 1st position. The first claw portion 47 may or may not protrude slightly from the surface of the rod 34 when arranged at the second position. The second claw portion 48 is provided at the other end of the rod 34. The 2nd nail | claw part 48 can be arrange | positioned in the 3rd position which protrudes from the surface of the rod 34, and the 4th position which does not protrude from the 3rd position. The second claw portion 48 may or may not protrude slightly from the surface of the rod 34 when disposed at the fourth position.

  The operating part 38 has a mechanism for interlocking the second claw part 48 with the first claw part 47. When the first claw portion 47 is disposed at the first position where the first claw portion 47 protrudes from the surface of the rod 34, the operation portion 38 causes the second claw portion 48 to be disposed at the fourth position. FIG. 14 shows a state in which the first claw portion 47 is arranged at the first position. When the first claw portion 47 is disposed at the second position, the operating portion 38 causes the second claw portion 48 to be disposed at the third position protruding from the surface of the rod 34. FIG. 15 shows a state in which the second claw portion 48 is disposed at the third position. For example, the operating part 38 may have a mechanism that always presses the first claw part 47 or the second claw part 48 so that the first claw part 47 is arranged at the first position by a leaf spring or the like.

  A mounting hole 35 a into which the other end of the rod 34 is inserted is formed in the main body 35. Further, the main body portion 35 is formed with a concave portion 35b in which the second claw portion 48 is disposed on the inner wall forming the attachment hole 35a. When the other end portion of the rod 34 is inserted into the attachment hole 35a and the second claw portion 48 located at the third position is disposed in the recess 35b, the second claw portion 48 is caught on the edge forming the attachment hole 35a. Thereby, the rod 34 is fixed to the main body portion 35. When the second claw portion 48 is disposed at the fourth position, the rod 34 can be pulled out from the main body portion 35.

  The cover 49 is detachably provided on a portion of the rod 34 that protrudes from the cylinder 31. For example, the cover 49 has a cylindrical shape with one side closed. The inner diameter of the cover 49 is slightly larger than the outer diameter of the rod 34. The cover 49 is attached to the rod 34 so as to cover one end of the rod 34 as shown in FIG. FIG. 15 shows an example in which a cover 49 placed on one end of the rod 34 is fixed to the rod 34 with a bolt 50.

  When the cover 49 is attached to the rod 34, the first claw portion 47 is pushed by the cover 49 and disposed at the second position. If the cover 49 is fixed to the rod 34 by the bolt 50, the cover 49 will not come off the rod 34 when the brake device 11 is performing a normal operation. That is, it is possible to prevent the main body portion 35 from coming off from the rod 34 when the brake device 11 is performing a normal operation.

  The maintenance staff first removes the cover 49 when pulling out the plunger 27. When the cover 49 is removed from the rod 34, the first claw portion 47 jumps out to the first position, and the second claw portion 48 is disposed at the fourth position. Thereby, the main body 35 can be removed from the rod 34. The maintenance staff can easily pull out the plunger 27 when performing maintenance of the brake device 11.

  1 car, 2 counterweights, 3 hoistway, 4 main rope, 5 machine room, 6 machine stand, 7 vibration isolator, 8 hoisting machine stand, 9 hoisting machine, 10 gear device, 11 brake device, 12 drive rope Car, 13 worm wheel, 14 worm, 15 brake wheel, 16 brake lining, 17 brake shoe, 18 brake arm, 19 brake lining, 20 brake shoe, 21 brake arm, 22 spring, 23 spring, 24 lever, 25 lever, 26 Electromagnetic plunger device, 27 plunger, 28 electromagnetic plunger device, 29 plunger, 30 coil, 31 cylinder, 32 switch, 33 case, 34 rod, 34a hollow portion, 35 body portion, 35a mounting hole, 35b Recessed portion, 36 release portion, 37 claw portion, 38 actuating portion, 39 presser plate, 40 screw rod, 41 bolt, 42 nut, 43 lifting rod, 44 spring, 45 hook, 46 magnet, 47 first claw portion, 48 second Nail, 49 cover, 50 bolt

Claims (8)

A rotating body that rotates in conjunction with an elevator drive sheave;
A facing member facing the rotating body;
An elastic body that generates a force for pressing the opposing member against the rotating body;
An electromagnetic plunger device that generates a force for separating the opposing member from the rotating body;
With
The electromagnetic plunger device is
Coils,
A plunger whose position changes depending on the presence or absence of current flowing in the coil;
A cylinder for guiding the movement of the plunger;
With
The plunger is
A rod having one end protruding from the cylinder;
A main body detachably provided at the other end of the rod;
Brake device with A rotating body that rotates in conjunction with an elevator drive sheave;
A first opposing member and a second opposing member facing the rotating body;
A first elastic body for generating a force for pressing the first opposing member against the rotating body;
A first electromagnetic plunger device that generates a force for separating the first opposing member from the rotating body;
A second elastic body for generating a force for pressing the second opposing member against the rotating body;
A second electromagnetic plunger device that generates a force for separating the second opposing member from the rotating body;
With
The first electromagnetic plunger device and the second electromagnetic plunger device are respectively
Coils,
A plunger whose position changes depending on the presence or absence of current flowing in the coil;
A cylinder for guiding the movement of the plunger;
With
The plunger is
A rod having one end protruding from the cylinder;
A main body detachably provided at the other end of the rod;
Brake device with The plunger further includes a release portion provided at a portion of the rod protruding from the cylinder.
The brake device according to claim 1, wherein the main body portion can be detached from the rod when a release operation is performed on the release portion.   The brake device according to claim 3, wherein the release portion is disposed at a position that does not protrude from the surface of the rod when a release operation is performed. The plunger is provided at the other end of the rod, and further includes a claw protruding from the surface of the rod,
The brake device according to claim 3 or 4, wherein the claw portion is disposed at a position where the claw portion does not protrude from the surface of the rod when a release operation is performed on the release portion.   The brake device according to any one of claims 1 to 5, wherein the plunger further includes a drawing auxiliary means that is exposed when the main body is removed from the rod. The plunger is
A first claw portion that is provided at a portion of the rod that protrudes from the cylinder and that can be disposed at a first position that protrudes from the surface of the rod and a second position that does not protrude from the first position;
A second claw portion that is provided at the other end of the rod and can be disposed at a third position protruding from the surface of the rod and a fourth position not protruding from the third position;
When the first claw portion is disposed at the first position, the second claw portion is disposed at the fourth position, and when the first claw portion is disposed at the second position, the first claw portion is disposed at the second position. An actuating part for disposing two claw parts at the third position;
A cover that is detachably provided on a portion of the rod that protrudes from the cylinder, and that is attached to the rod, the cover that places the first claw portion in the second position;
The brake device according to claim 1 or 2, further comprising:   The brake device according to any one of claims 1 to 7, wherein the rotating body is provided on an output shaft of a worm gear.

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