JP2017178477A - Electromagnetic brake device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic brake device for an elevator capable of enhancing responsibility of armature in a simple structure without expanding outer shape of outer pole face formed in a periphery of an electromagnetic coil.SOLUTION: In this brake device, a surface structure on an armature 3 side of an iron core 2 is devised to: form, in a periphery of the iron core 2 encasing an electromagnetic coil 1 in a receiving recessed part 5, a substantially annular non-contact area 6 in which the coil 1, when electrified to become in a magnetized state with an electromagnetic force applied, does not contact with the armature 3; to form a substantially annular outer magnetic pole surface 7 between an inner side of the non-contacting part 6 and a periphery of the coil 1; and an inner magnetic pole surface 8 on an inner side of the coil 1; as well as to form brake spring attachment holes 9A to 9F, each as a cylindrical recessed part attached with a brake spring 10, arranged in a recessed local area in the outer magnetic pole surface 7 so that an eddy current flowing in a circumferential direction of the outer magnetic pole surface 7; to protrude the outer magnetic pole surface 7 and the inner magnetic pole surface 8 to the armature 3 side with respect to the non-contacting part 6, so that the coil 1, when electrified to become in the electromagnetic force applied state, contacts with the armature 3; and reduce an area of the outer magnetic pole surface 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electromagnetic brake device for an elevator used in combination with a hoisting machine in an elevator device.

  Conventionally, as a well-known technique related to this type of electromagnetic brake device for an elevator, there is an “electromagnetic brake device” (see Patent Document 1) in which a collision sound generated at the time of opening and releasing is reduced.

JP 2005-180626 A

  The electromagnetic brake device of Patent Document 1 described above is attracted to the iron core side by an electromagnetic force generated from the electromagnetic coil that is disposed so as to reciprocate between the iron core incorporating the electromagnetic coil and the disk to be braked and the iron core. An arm, a brake pad arranged opposite to the disk and coupled to the amateur, and a brake spring mounted between the armature and the iron core to suppress the amateur to the disk side, and the electromagnetic coil is de-energized In a structure in which the brake pad is pressed against the disc by the urging force of the braking spring when in the state and the brake pad is separated from the disc by the electromagnetic force when the electromagnetic coil is in the excited state, it is compressed between the armature and the iron core. A cushioning material is attached to.

  However, according to the structure of the electromagnetic brake device described in Patent Document 1, since the braking spring is arranged on the outer magnetic pole surface itself formed on the outer peripheral portion of the electromagnetic coil, the outer magnetic pole formed on the outer peripheral portion of the electromagnetic coil. There is a problem that the responsiveness of the amateur is lowered due to the increased outer shape of the surface.

  The present invention has been made to solve such problems, and its technical problem is that the response of an amateur with a simple structure without increasing the outer shape of the outer magnetic pole surface formed on the outer periphery of the electromagnetic coil. It is an object of the present invention to provide an electromagnetic brake device for an elevator that can improve performance.

  In order to solve the above technical problems, the present invention provides an iron core with a built-in electromagnetic coil, an armature that is attracted to the iron core side by an electromagnetic force generated from the electromagnetic coil, and an outer periphery of the electromagnetic coil in the iron core discretely. A plurality of brake spring mounting holes provided as recesses are mounted inside the plurality of brake spring mounting holes, and are mounted between the armature and the iron core so that the armature is separated from the iron core. In an electromagnetic brake device for an elevator equipped with an urging brake spring, a non-contact portion of a substantially annular recess is provided on the iron core so that the outer peripheral portion is not contacted with the armature when an electromagnetic force is applied when an electromagnetic coil is energized. And a substantially annular outer magnetic pole surface is formed between the inside of the non-contact portion and the outer peripheral portion of the electromagnetic coil.

  According to the present invention, with the above configuration, the responsiveness of the amateur can be improved with a simple structure without increasing the outer shape of the outer magnetic pole surface formed on the outer peripheral portion of the electromagnetic coil. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is the figure which showed a part of basic structure of the electromagnetic brake device for elevators concerning the example of the present invention, and showed it from the side direction. It is the figure which showed the iron core with which the electromagnetic brake device for elevators shown in FIG. 1 was equipped in the state before member assembly from the front direction.

  Hereinafter, an electromagnetic brake device for an elevator according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a partial perspective view of the basic structure of an elevator electromagnetic brake device according to an embodiment of the present invention, viewed from the side. Moreover, FIG. 2 is the figure which showed the iron core 2 with which this electromagnetic brake device is equipped in the state before a member assembly | attachment from the front direction.

  1 and 2, the electromagnetic brake device according to the embodiment is used in combination with a hoisting machine in an elevator device, and as a basic structure, a through hole 4 is formed in a disk-shaped central shaft portion. In addition, an iron core 2 in which a housing recess 5 for housing the electromagnetic coil 1 concentrically is formed on the outer peripheral side of the through hole 4, and an electromagnetic wave built in the iron core 2 by being housed in the housing recess 5 of the iron core 2. The armature 3 is disposed opposite to the coil 1 and the iron core 2, and is attracted to the iron core 2 side by the electromagnetic force generated from the electromagnetic coil 1, and the outer periphery of the electromagnetic coil 1 (housing recess 5) in the iron core 2. The brake spring mounting holes 9A to 9F, which are discretely provided as cylindrical recesses, are mounted in the brake spring mounting holes 9A to 9F, respectively, and are mounted between the armature 3 and the iron core 2. Amateur The includes a damping spring 10 for urging in a direction away from the core 2, a.

  Among these, the amateur 3 is disposed between the disk 2 to be braked connected to a sheave of a hoisting machine (not shown) and the iron core 2. In simple terms, the mounting structure including the disk for the amateur 3 is such that the opposing surface of the armature 3 and the disk is connected by a rod 11 inserted and disposed inside the through hole 4, and one brake pad is connected to the tip of the rod 11. One brake pad is disposed opposite to the other brake pad with the disc in between, and the other brake pad is further shaken to a base for fixing a motor or the like for driving the hoisting machine. Fixed to a body that is supported movably. With such a structure, the armature 3 is disposed so as to freely reciprocate along the axial direction of the rod 11, and moves to the iron core 2 side by the electromagnetic force from the electromagnetic coil 1 in an excited state in which the electromagnetic coil 1 is energized, In the non-excited state where the electromagnetic force is released, the disc is moved to the disk side by the urging force from the brake spring 10.

  In the electromagnetic brake device according to the embodiment, the surface structure on the armature 3 side of the iron core 2 is devised. More specifically, the iron core 2 is formed with a non-contact portion 6 having a substantially annular recess so as not to come into contact with the armature 3 when the electromagnetic coil 1 is energized to the outer peripheral portion so as not to contact the armature 3. A substantially annular outer magnetic pole surface 7 is formed between the inside of the portion 6 and the outer peripheral portion of the electromagnetic coil 1, and an annular inner magnetic pole surface 8 is formed inside the electromagnetic coil 1. The area of the outer magnetic pole surface 7 is smaller than that of a general outer magnetic pole surface including Patent Document 1. Further, the outer magnetic pole surface 7 and the inner magnetic pole surface 8 here protrude from the non-contact portion 6 toward the armature 3 side so as to come into contact with the armature 3 when the electromagnetic coil 1 is energized when the electromagnetic force is applied. Yes. By adopting such a structure, the operation when the electromagnetic force is applied in an excited state is stably performed, and the responsiveness of the amateur 3 can be improved.

  Further, the plurality of braking spring mounting holes 9A to 9F provided as discrete recesses in the outer peripheral portion of the electromagnetic coil 1 in the iron core are not formed on the outer side away from the outer peripheral portion of the outer magnetic pole surface 7, The inner side of the central part facing the through hole 4 is cut so as to dig into the local part of the outer magnetic pole surface 7 so that the area of the outer magnetic pole surface 7 can be further reduced. As a desirable formation pattern of the brake spring mounting holes 9A to 9F, a portion of the brake spring mounting holes 9A to 9F located on the center side of the iron core 2 as shown in FIG. Furthermore, the case where it forms so that it may straddle the non-contact part 6 and the outer magnetic pole surface 7, after making it approach the outer peripheral side of the electromagnetic coil 1 (accommodation recessed part 5) rather than can be illustrated. With such a structure, the responsiveness of the amateur 3 can be further improved, and eddy currents can be reduced.

  According to the electromagnetic brake device according to the embodiment, the area of the outer magnetic pole surface 7 is formed in an annular shape by the characteristic structure of the formation pattern of the outer magnetic pole surface 7 and the formation patterns of the brake spring mounting holes 9A to 9F. Since the eddy current flowing in the circumferential direction can be reduced by making it smaller than the case, the armature 3 can be formed with a simple structure without increasing the outer shape of the outer magnetic pole surface 7 formed on the outer peripheral portion of the electromagnetic coil 1. Responsiveness can be improved.

  As a basic operation in this electromagnetic brake device, when the brake is released, the electromagnetic coil 1 is energized to reach an excited state, and the armature 3 is attracted to the iron core 2 by the electromagnetic force generated from the electromagnetic coil 1. At this time, the armature 3 moves toward the iron core 2 against the biasing force generated from the brake spring 10, and the armature 3 is attracted to the iron core 2. The movement of the amateur 3 causes the schematic disk to be released from the brake pad, and the brake is released from the disk. Further, along with the movement of the armature 3 at this time, the armature 3 is guided by the rod 11 inserted and arranged in the through hole 4 and the brake spring 10 is compressed. On the other hand, when the brake is released, the energization of the electromagnetic coil 1 is cut off, the electromagnetic coil 1 is brought into a non-excited state, the electromagnetic force generated from the electromagnetic coil 1 disappears, and only the urging force of the braking spring 10 is an amateur. 3 is given. As a result, the armature 3 moves to the side of the disk schematically shown, and the disk is pressed against the brake pad using the urging force from the braking spring 10 as a braking force to enter a braking state.

  By the way, in the conventional structure like the case of patent document 1, it is the form which forms the whole brake spring mounting holes 9A-9F with respect to the outer magnetic pole surface 7, Therefore The external shape (radial width) of the outer magnetic pole surface 7 is formed. ) Cannot be made equal to or smaller than the outer diameter of the brake spring mounting holes 9A to 9F, and the area of the outer magnetic pole surface 7 cannot be reduced thereby, and the problem that the responsiveness of the amateur is lowered cannot be avoided. However, in the structure according to the embodiment, a substantially annular non-contact portion 6 that does not contact the armature 3 is formed on the outer peripheral portion of the iron core 2, and is substantially between the inner side of the non-contact portion 6 and the outer peripheral portion of the electromagnetic coil 1. By forming the annular outer magnetic pole surface 7, the outer shape (radial width) of the outer magnetic pole surface 7 can be reduced and the area can be reduced. Responsiveness of amateur 3 is improved. Further, in the structure according to the embodiment, in addition to the formation pattern of the outer magnetic pole surface 7, the outer magnetic pole surface 7 is configured to reduce the eddy current flowing in the circumferential direction of the outer magnetic pole surface 7 through the brake spring mounting holes 9 </ b> A to 9 </ b> F. The area of the outer magnetic pole surface 7 is further reduced, and the eddy current flowing in the circumferential direction of the outer magnetic pole surface 7 can be reduced. Property can be further improved.

  In the electromagnetic brake device according to the embodiment, the brake spring mounting holes 9 </ b> A to 9 </ b> F as a total of six cylindrical recesses are formed in the iron core 2 so that the electromagnetic coil 1 (accommodation recess 5) is closer than the outer peripheral portion of the outer magnetic pole surface 7. Although the case where it is provided close to the outer peripheral side is illustrated, such a form is merely an example, and the shape, number, or formation pattern can be changed variously. For example, the total number is 5 or 7 or more Therefore, the elevator electromagnetic brake device of the present invention is not limited to the form disclosed in the embodiments.

DESCRIPTION OF SYMBOLS 1 Electromagnetic coil 2 Iron core 3 Amateur 4 Through-hole 5 Storage recessed part 6 Non-contact part 7 Outer magnetic pole surface 8 Inner magnetic pole surface 9A-9F Brake spring mounting hole 10 Brake spring 11 Rod

Claims (3)

An iron core with a built-in electromagnetic coil, an armature attracted to the iron core side by electromagnetic force generated from the electromagnetic coil, and a plurality of braking springs provided as discrete recesses on the outer periphery of the electromagnetic coil in the iron core A mounting hole, and a braking spring mounted in each of the plurality of braking spring mounting holes and mounted between the armature and the iron core to bias the armature in a direction away from the iron core; In an electromagnetic brake device for an elevator equipped with
A non-contact portion of a substantially annular recess is formed on the iron core so that the outer periphery does not come into contact with the armature when an electromagnetic force is applied when the electromagnetic coil is energized. The inner side of the non-contact portion and the electromagnetic coil An electromagnetic brake device for an elevator, characterized in that a substantially annular outer magnetic pole surface is formed between the outer peripheral portion of the elevator. The electromagnetic brake device for elevators according to claim 1,
The plurality of brake spring mounting holes are formed so as to squeeze a local portion of the outer magnetic pole surface in the iron core so as to reduce eddy current flowing in a circumferential direction of the outer magnetic pole surface, and an area of the outer magnetic pole surface An electromagnetic brake device for an elevator characterized in that The electromagnetic brake device for elevators according to claim 2,
An inner magnetic pole surface is formed inside the electromagnetic coil on the iron core, and the outer magnetic pole surface and the inner magnetic pole surface are in contact with the armature when an electromagnetic force is applied in an excited state where the electromagnetic coil is energized. An elevator electromagnetic brake device, wherein the elevator electromagnetic brake device is formed so as to protrude from the non-contact portion toward the armature.