Brake release lever

Abstract

To provide a brake release lever capable of inserting a pin member between a plate and an armature even if equipment is provided on a side surface part of the plate.SOLUTION: A brake release lever 50 includes: a grip portion 52; two clamping portions 53, 53; a connection portion 54 that connects the grip portion 52 and each clamping portion 53; and two pin members 56, 57 that are respectively provided in the two clamping portions 53, 53 and are inserted between an armature 14 and a plate 15. At least the two clamping 53, 53 are formed to be dividable.SELECTED DRAWING: Figure 4

Description

Technical Field

[0005] , ,

[0001] The present invention relates to a brake release lever for releasing an electromagnetic brake device provided in an elevator hoist.

Background Art

[0002] Conventionally, an elevator includes a car, a counterweight, a rope connecting the car and the counterweight, and a hoist around which the rope is wound. The hoist has a drive unit, a rotating shaft connected to the drive unit, a sheave rotatably supported on the rotating shaft around which the rope is wound, and a brake disk connected to the sheave. Further, the hoist is provided with an electromagnetic brake device that brakes the rotation of the brake disk to brake the sheave.

[0003] Also, when the car suddenly stops during an emergency such as a power failure or an earthquake, the car may stop at a stop position different from the stop position during normal operation. In this case, it is necessary to manually and forcibly release the electromagnetic brake device that is in a braking state.

[0004] As a technique for forcibly releasing such an electromagnetic brake device, for example, there is one described in Patent Document 1. Patent Document 1 describes a technique of attaching two pin members provided at each tip of a substantially portal-shaped frame and inserting the pin members into a gap formed by an armature and a plate that sandwich a friction disk. Further, in the technique described in Patent Document 1, it is described that by rotating the frame with the two pin members as a fulcrum and an action point, respectively, the clamping of the friction disk is released and the braking force is released. And in the technique described in Patent Document 1, the pin member is inserted between the armature and the plate by sliding the pin member from the side of the electromagnetic brake device.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] However, in recent electromagnetic brake systems, various devices such as control switches and operation confirmation switches are provided on the side of the plate. Therefore, the technology described in Patent Document 1 had the problem that the devices provided on the side of the plate interfered with the pin member, making it impossible to slide the pin member and insert it between the armature and the plate.

[0007] The objective of this invention is to provide a brake release lever that allows a pin member to be inserted between the plate and the armature, even if equipment is provided on the side of the plate, taking into consideration the above-mentioned problems. [Means for solving the problem]

[0008] To solve the above problems and achieve the above objective, the brake release lever is a brake release lever used in an electromagnetic brake device installed on an elevator hoisting machine. The brake release lever comprises a gripping portion, two clamping portions, a connecting portion that connects the gripping portion and the clamping portions, and two pin members provided on each of the two clamping portions and inserted between the armature and plate of the electromagnetic brake device. At least two of the clamping portions are formed to be separable. [Effects of the Invention]

[0009] With the brake release lever configured as described above, even if equipment is provided on the side of the plate, the pin member can be inserted between the plate and the armature. [Brief explanation of the drawing]

[0010] [Figure 1] This is a front view showing an elevator hoisting machine in which a brake release lever according to an embodiment is used. [Figure 2]This is a side view showing an elevator hoisting machine in which a brake release lever according to an embodiment is used. [Figure 3] Figure 3A shows a cross-sectional view and Figure 3B shows a front view, illustrating an electromagnetic brake device using a brake release lever according to an embodiment. [Figure 4] This is a front view showing a brake release lever according to an embodiment. [Figure 5] This is a side view showing a brake release lever according to an embodiment. [Figure 6] This is an explanatory diagram showing how the brake release lever according to an embodiment is installed in an electromagnetic brake device. [Figure 7] This is an explanatory diagram showing the brake release lever according to an embodiment installed in an electromagnetic brake device. [Modes for carrying out the invention]

[0011] The following describes an example of a brake release lever with reference to Figures 1 to 7. Note that common components in each figure are denoted by the same reference numerals.

[0012] 1. Example of an Embodiment 1-1. Hoisting Machine Configuration First, the configuration of the elevator hoisting machine using the brake release lever according to the embodiment example (hereinafter referred to as "this example") will be described with reference to Figures 1 and 2. Figure 1 is a front view showing the hoisting machine, and Figure 2 is a side view.

[0013] The hoisting machine 1 shown in Figures 1 and 2 is installed in an elevator located in a hoistway formed within a building structure.

[0014] As shown in Figures 1 and 2, the hoisting machine 1 includes a machine base 2, a drive motor 3, a sheave 4, an electromagnetic brake device 5, and a transmission mechanism 6 that represents a reduction mechanism. The drive motor 3 and the sheave 4 are mounted on the machine base 2.

[0015] A rope connected to a counterweight is wound around the hoist 4, which carries people and goods. A transmission mechanism 6 is also connected to the main shaft (not shown) of the hoist 4. The transmission mechanism 6 is connected to the rotating shaft of the drive motor 3. An electromagnetic brake device 5 for controlling the rotation of the drive motor 3 is provided on the rotating shaft of the drive motor 3.

[0016] 1-2. Structure of the electromagnetic brake device 5 Next, the structure of the electromagnetic brake device 5 will be described with reference to FIGS. 3A and 3B. FIG. 3A is a cross-sectional view showing the electromagnetic brake device 5, and FIG. 3B is a front view showing the electromagnetic brake device 5.

[0017] As shown in FIGS. 3A and 3B, the electromagnetic brake device 5 includes a fixed core 11, a coil 12, a brake spring 13, an armature 14, a plate 15, and a brake disk 16. The armature 14 and the plate 15 are formed in a substantially circular shape.

[0018] The coil 12 is built into the fixed core 11. The armature 14 is arranged opposite to the fixed core 11. A plate 15 is arranged on one surface of the armature 14 opposite to the fixed core 11. A brake disk 16 is arranged between the armature 14 and the plate 15. The brake disk 16 is connected to the rotating shaft (not shown) of the drive motor 3. The rotating shaft is arranged to penetrate the centers of the fixed core 11, the armature 14, and the plate 15.

[0019] Furthermore, a brake spring 13 for pressing the armature 14 and the plate 15 against the brake disk 16 is provided on the fixed core 11. The armature 14 and the plate 15 are supported so as to be axially movable by a plurality of support rods 19 and spring pins 18 provided on the fixed core 11. A spring for maintaining the distance between the armature 14 and the plate 15 is attached to the spring pin 18.

[0020] Furthermore, the support rods 19 and spring pins 18 are positioned on the outer circumference of the armature 14 and plate 15. Multiple support rods 19 and spring pins 18 are arranged at equal intervals along the circumference of the armature 14 and plate 15. In addition, multiple support rods 19 and spring pins 18 are arranged point-symmetrically with respect to the center of the armature 14 and plate 15. Therefore, the support rods 19 and spring pins 18 are positioned diagonally with the center of the plate 15 in between. Note that the support rods 19 and spring pins 18 do not necessarily have to be positioned diagonally.

[0021] When the electric elevator car is stopped, the electromagnetic brake device 5 cuts off the current to the coil 12. The armature 14 is then pressed against the brake disc 16 by the braking spring 13. As a result, the brake disc 16 is clamped between the armature 14 and the plate 15, and the brake disc 16 and the sheave 4 are braked.

[0022] Furthermore, when the elevator car is in motion, a predetermined voltage is applied to the coil 12, exciting the fixed core 11. As a result, an electromagnetic attractive force exceeding the biasing force of the braking spring 13 is applied to the fixed core 11. This causes the armature 14 to be attracted to the fixed core 11 against the biasing force of the braking spring 13, separating the armature 14 and plate 15 from the brake disc 16, and releasing the braking force of the electromagnetic brake device 5. Consequently, the brake disc 16 and the rotating shaft connected to the brake disc 16 become rotatable.

[0023] Furthermore, various devices 21, such as control switches and operation confirmation switches, are provided on the radially outer edges of the armature 14 and plate 15 of the electromagnetic brake device 5.

[0024] 1-3. Brake release lever configuration Next, the configuration of the brake release lever 50 used in the electromagnetic brake device 5 having the above-described configuration will be explained with reference to Figures 4 and 5. Figure 4 is a front view showing the brake release lever 50, and Figure 5 is a side view showing the brake release lever 50.

[0025] As shown in Figures 4 and 5, the brake release lever 50 comprises a first member 51A, a second member 51B, and a connecting portion 60 that connects the first member 51A and the second member 51B. In other words, the brake release lever 50 has a divided structure made up of two members, the first member 51A and the second member 51B. Since the first member 51A and the second member 51B have the same configuration, the first member 51A will be described here.

[0026] The first member 51A has a gripping portion 52 for the worker to grasp, a clamping portion 53, a connecting portion 54 that connects the gripping portion 52 and the clamping portion 53, a first pin member 56, and a second pin member 57. The first member 51A is also formed from a so-called Z-shaped steel material, which is formed by bending a long steel material twice.

[0027] The gripping portion 52 is provided with a fixing hole 52a to which a connecting portion 60 is attached. The gripping portion 52 of the first member 51A and the gripping portion 52 of the second member 51B are superimposed and connected by the connecting portion 60, thereby integrally connecting the two gripping portions 52. In this example, a fixing bolt and nut are used as the connecting portion 60.

[0028] The connecting portion 60 is not limited to fixing bolts and nuts. For example, the connecting portion 60 may be an engaging hook that engages with the other gripping portion 52 on one of the two gripping portions 52, or the two gripping portions 52 may be connected by a hinge. Thus, various other configurations can be applied to the connecting portion 60.

[0029] A connecting portion 54 is bent approximately vertically and continues from one longitudinal end of the gripping portion 52. A clamping portion 53 is bent approximately vertically and continues from the end of the connecting portion 54 opposite to the end connected to the gripping portion 52. The clamping portion 53 is bent toward the opposite side from the gripping portion 52. When the first member 51A and the second member 51B are connected, the clamping portion 53 of the first member 51A and the clamping portion 53 of the second member 51B face each other with a gap between them. The armature 14 and plate 15 of the electromagnetic brake device 5 are positioned between these two clamping portions 53.

[0030] At the end of the clamping portion 53 opposite to the end continuous with the connecting portion 54, i.e., at the tip of the clamping portion 53, a first pin member 56 and a second pin member 57 are provided at a distance from each other. The first pin member 56 is positioned closer to the tip of the clamping portion 53 than the second pin member 57. The distance between the first pin member 56 and the second pin member 57 is set to be slightly longer than the diameter of the spring pin 18 and support rod 19 of the electromagnetic brake device 5. In addition, the diameters of the first pin member 56 and the second pin member 57 are set to be slightly smaller than the distance between the armature 14 and the plate 15 when braking in the electromagnetic brake device 5.

[0031] Furthermore, the first pin member 56 and the second pin member 57 are fixed to the opposing surfaces of the clamping portion 53 that face the other clamping portion 53 when the first member 51A and the second member 51B are connected. The first pin member 56 and the second pin member 57 protrude from the opposing surfaces of the clamping portion 53 toward the other clamping portion 53.

[0032] The first pin member 56 and the second pin member 57 are fixed to the clamping portion 53 by welding. Various fixing methods can be applied to the clamping portion 53, such as fastening with fixing bolts and nuts. Furthermore, by integrally fixing the first pin member 56 and the second pin member 57 to the clamping portion 53 by welding, the mounting strength of the first pin member 56 and the second pin member 57, which are subjected to load during operation, can be increased.

[0033] In this example, the brake release lever 50 is described as being divided into two parts, a first member 51A and a second member 51B, from the gripping portion 52, but it is not limited to this. For example, it may be configured to divide only the two clamping portions 53, 53. However, if only the two clamping portions 53, 53 are divided, a structure is needed to prevent the gap between the two clamping portions 53, 53 from widening after connection. Furthermore, since a load is applied between the clamping portion 53 and the gripping portion 52 during operation, it is necessary to ensure the strength of the connection point.

[0034] Therefore, by dividing the gripping portion 52 into two parts, the first member 51A and the second member 51B, assembly can be improved. Furthermore, the gripping portion 52 and the clamping portion 53 can be formed as a single unit, improving the overall strength of the brake release lever 50. In addition, since the first member 51A and the second member 51B can be formed as the same part, the manufacturing of the brake release lever 50 can be made easier. Moreover, the first member 51A and the second member 51B are formed from steel material bent into a Z shape. Therefore, the strength of the first member 51A and the second member 51B can be increased.

[0035] 2. Example of brake release lever installation Next, an example of the installation of the brake release lever 50 having the above-described configuration will be explained with reference to Figures 6 and 7. Figures 6 and 7 are explanatory diagrams showing examples of the installation of the brake release lever 50.

[0036] First, as shown in Figure 6, the connecting portion 60 is removed from the gripping portion 52, and the first member 51A and the second member 51B are separated. Then, the distance between the clamping portions 53 of the first member 51A and the second member 51B is widened to be greater than the diameter of the armature 14 and plate 15 of the electromagnetic brake device 5. Next, the first pin member 56 and the second pin member 57, which are provided on the clamping portions 53 of the first member 51A and the second member 51B, are inserted between the armature 14 and the plate 15 from the radially outside of the armature 14 and the plate 15. In other words, the two clamping portions 53, 53 of the brake release lever 50 are separated, and the first pin member 56 and the second pin member 57 are inserted from the side of the electromagnetic brake device 5.

[0037] This prevents the first pin member 56 and the second pin member 57 from interfering with the equipment 21, even if various devices 21 are provided on the side surfaces of the plate 15 and armature 14 of the electromagnetic brake device 5. As a result, the first pin member 56 and the second pin member 57 can be easily inserted between the armature 14 and the plate 15.

[0038] Furthermore, a support rod 19 or a spring pin 18 is inserted between the first pin member 56 and the second pin member 57. At this time, the first pin member 56 and the second pin member 57 of the first member 51A and the first pin member 56 and the second pin member 57 of the second member 51B are arranged diagonally with the center of the plate 15 in between.

[0039] Here, the support rod 19 and the spring pin 18 are positioned diagonally across the center of the plate 15. This makes it easy to position the first pin member 56 and the second pin member 57 of the first member 51A and the first pin member 56 and the second pin member 57 of the second member 51B.

[0040] Furthermore, even if the support rod 19 and the spring pin 18 are not arranged diagonally, the first member 51A and the second member 51B can be aligned by hooking one of the first pin members 56 and the second pin member 57 onto the support rod 19 or the spring pin 18.

[0041] Furthermore, the positions for inserting the first pin member 56 and the second pin member 57 are not limited to the example described above, but are set appropriately according to the configuration of the electromagnetic brake device 5, and only need to be inserted between the armature 14 and the plate 15.

[0042] Next, the gripping portion 52 of the first member 51A and the gripping portion 52 of the second member 51B are superimposed. Then, as shown in Figure 7, the connecting portion 60 is inserted into the fixing holes 52a provided in the two gripping portions 52, and the first member 51A and the second member 51B are connected as a single unit. This allows the brake release lever 50 to be installed in the electromagnetic brake device 5. As described above, since the first pin member 56 and the second pin member 57 are hooked onto the support rod 19 or spring pin 18, the brake release lever 50 can be held in the desired position.

[0043] The operator then rotates the gripping portions 52 of the first member 51A and the second member 51B toward the front side of the paper as shown in Figure 7. The first pin member 56 and the second pin member 57 then rotate between the plate 15 and the armature 14, acting as the fulcrum and point of application. Specifically, the first pin member 56 presses the armature 14 toward the fixed core 11, while the second pin member 57 presses against the plate 15 in a direction that moves it away from the armature 14. As a result, the armature 14 is pressed by the first pin member 56 and moves toward the fixed core 11 against the biasing force of the braking spring 13, and the armature 14 and plate 15 move away from the brake disc 16. Consequently, the braking of the electromagnetic brake device 5 can be released by the brake release lever 50.

[0044] It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention as described in the claims.

[0045] Although the hoisting machine to which the brake release lever 50 according to the above embodiment example is applied is the hoisting machine 1 shown in Figures 1 and 2, it is not limited to this. For example, it can be applied to electromagnetic brake devices installed on various other hoisting machines, such as a hoisting machine to which a drive motor 3 is located at one end of the axial direction of the main shaft of the sheave 4.

[0046] Furthermore, the electromagnetic brake device is not limited to the electromagnetic brake device 5 shown in Figures 3A and 3B. For example, the brake release lever of the present invention can be applied to various other electromagnetic brake devices, such as an electromagnetic brake device having multiple brake discs and multiple plates.

[0047] In this specification, although terms such as "parallel" and "orthogonal" are used, these do not mean only strictly "parallel" and "orthogonal," but may also refer to states that are "approximately parallel" or "approximately orthogonal," which include "parallel" and "orthogonal" and are within a range in which they can perform their functions. [Explanation of symbols]

[0048] 1... Hoisting machine, 3... Drive motor, 4... Sheave, 5... Electromagnetic brake device, 6... Transmission mechanism, 11... Fixed core, 12... Coil, 14... Armor, 15... Plate, 16... Brake disc, 18... Spring pin, 19... Support rod, 21... Equipment, 50... Brake release lever, 51A... First member, 51B... Second member, 52... Gripping part, 52a... Fixing hole, 53... Clamping part, 54... Connecting part, 56... First pin member, 57... Second pin member, 60... Connecting part

Claims

1. In a brake release lever used in an electromagnetic brake device installed on an elevator hoisting machine, The electromagnetic brake device comprises an armature and a plate, and equipment is provided on the radially outer edge of the plate. The aforementioned brake release lever is A first member having a gripping portion, a clamping portion, and a connecting portion connecting the gripping portion and the clamping portion, A second member having a gripping portion that overlaps with the gripping portion of the first member, a clamping portion that faces the clamping portion of the first member, and a connecting portion that connects the gripping portion and the clamping portion, A connecting portion that connects the gripping portion of the first member and the gripping portion of the second member, The device comprises two pin members provided on the clamping portion of the first member and the clamping portion of the second member, respectively, and inserted between the armature and the plate of the electromagnetic brake device, The first member and the second member are formed to be separable, The first member and the second member, when separated, allow the distance between the two clamping portions to be wider than the diameter of the armature and the plate. In their separated state, the first and second members allow the pin member to be inserted between the armature and the plate from the radially outer side of the armature and the plate. Brake release lever.

2. The first and second members are formed from steel material bent into a Z shape. The brake release lever according to claim 1.

3. The first member and the second member each have the same shape. The brake release lever according to claim 1.

4. The gripping portions of the first and second members are provided with fixing holes. The aforementioned connecting portion consists of a fixing bolt and nut inserted into the fixing hole. The brake release lever according to claim 1.

Images