JP2008239329A - Brake control system for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake control system for an elevator furnished with an auxiliary brake simple in structure and high in operational reliability. <P>SOLUTION: A brake drum is provided with a braking surface 4 and an engaging surface 13 with irregularity, and a brake shoe is provided with a movable engaging member 7 at a position to be engaged with the engaging surface 13. This brake control system for the elevator is devised to freely move the shoe to a first position to hold the shoe at a non-operating position separated from the braking surface 4 with the engaging member 7 against working force of a braking spring, a second position to pressurize only the shoe on the braking surface 4 by partially releasing spring working force and a third position to pressurize the shoe on the braking surface 4 by totally releasing the spring working force and to make the engaging member 7 engaged with the engaging surface 13 by moving an electromagnetic device 12 for brake shoe operation to the three positions. It is possible to make the brake control system for the elevator simple in structure and high in operational reliability. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator brake device, and more particularly to an elevator brake device including an auxiliary brake device that operates when stopped.

  In a conventional elevator brake device with an auxiliary brake device, for example, as described in Patent Document 1, the auxiliary brake device is a rotation of a sheave, etc., separately from the brake device connected to the hoisting motor. A gear is provided on the member, and an operation piece is inserted between the gear teeth by a dedicated electromagnetic coil device to prevent the rotation of the gear, thereby preventing the elevator car from moving.

  Further, for example, Patent Document 2 describes a technique in which braking is performed by inserting a braking bolt between spokes of a sheave by an electromagnetic solenoid when an elevator car is raised at an excessive speed.

JP-A-6-64860 JP-A-5-193860

  However, in these conventional elevator brake devices, the auxiliary brake device is completely different from the brake device for deceleration / stop during normal operation, and is operated by a special failure detection circuit. Is. In addition, the restoration work after the auxiliary brake device is activated once requires a complicated procedure, and the restoration time is prolonged.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an elevator brake device including an auxiliary brake device having a simple structure and high operation reliability.

  An elevator brake device according to the present invention includes: a braked member; an operating position where the brake is brought into contact with the braked member; a braking member supported so as to be movable to an inoperative position spaced apart from the braked member; In the elevator brake device, comprising: a spring member biased to a constantly operating position; and an electromagnetic device that moves the braking member from the operating position to the non-operating position against the acting force of the spring member. The brake member has a braking surface that is pressed during braking, and an engagement surface that has a vertical component with respect to the moving direction of the braked member provided in or near the braking surface. The brake device is further provided on the braking member and is engaged with the engagement surface of the braked member only when the brake member is in the non-engaged position spaced from the braked member and the brake member is in the operating position. An engagement member supported movably at the engagement position, and a spring provided between the brake member and the engagement member and biasing the engagement member to the non-engagement position at all times. The electromagnetic device has a first position for holding the braking member in the inoperative position spaced apart from the braking surface together with the engaging member against a spring acting force of the spring member, and a spring action of the spring member. A second position where the force is partially released and only the braking member is pressed against the braking surface; and the spring acting force of the spring member is fully released to press the braking member against the braking surface and the engagement It is movable to a third position where the member is engaged with the engagement surface.

  According to this invention, the brake device for elevators provided with the auxiliary brake device with simple structure and high operation | movement reliability can be provided.

Embodiment 1 FIG.
1 to 4 schematically show an embodiment of an elevator brake device according to the present invention, FIG. 1 is a front view of the elevator brake device in a released state, and FIG. 2 is taken along line AA in FIG. FIG. 3 is a front view of the elevator brake device in a braking state, and FIG. 4 is a front view of the elevator brake device in a stopped state.

  The elevator brake device includes a braked member 1 that is a brake drum that rotates together with a sheave or the like (not shown), and includes a brake member 3 supported by a frame 2 inside the braked member 1. . The member to be braked 1 is a cylindrical member, and has an inner peripheral surface having a braking surface 4 that contacts when the braking member 3 is in the operating position shown in FIGS. The braking member 3 is a relatively thick rectangular plate-like brake shoe as a whole, and is rotatably supported by the frame 2 at one end by a pin 5, as shown in FIGS. 3 and 4. As shown in FIG. 1, it is possible to move to an operation position where the braking surface 4 is brought into contact with the braking surface 4 and a non-operation position where the braking operation is not performed.

  One end of a lever-like engaging member 7 is pivotally attached to the other end of the braking member 3, that is, the end portion not pivotally attached to the pin 5 by a pin 6. A leaf spring 8 is provided between the braking member 3 and the engaging member 7, and the relative positional relationship between the braking member 3 and the engaging member 7 is always in the non-engagement position, which is the angular position shown in FIG. It is designed to be elastically biased. As will be described in detail later, this disengaged position is a position where the brake member 3 is maintained at the operating position shown in FIG. 3 as well as when the brake member 3 is in the inoperative position. The strength of the leaf spring 8 normally maintains the engagement member 7 in the non-engagement position, but the engagement member 7 engages with the engagement surface 13 in the complete stop state shown in FIG. It is strong enough to move to the engagement position.

  A pin 9 is provided at the other end of the engagement member 7, and a spring member 10, which is a compression spring, is provided between the pin 9 and the frame 2. It pushes toward 1. A pin 11 is provided at an intermediate portion of the engaging member 7, that is, a position between the pin 5 and the pin 9, and an electromagnetic device 12 that is a solenoid device is provided between the pin 11 and the frame 2. It has been. Thus, the spring member 10 biases the braking member 3 to the normally operating position (FIGS. 3 and 4) via the engaging member 7, and the action of the spring member 10 when the electromagnetic device 12 is energized. The braking member 3 is moved from the operating position (FIGS. 3 and 4) to the non-operating position (FIG. 1) through the engaging member 7 against the force.

  The brake member 1 that is a brake drum is provided with a braking surface 4 that is pressed when the brake member 3 that is a brake shoe is braked as described above. An engagement surface 13 having a component in the vertical direction with respect to the moving direction (circumferential direction) of the braked member 1 is provided inside, in the vicinity of, or in a position adjacent thereto. The engagement surface 13 can be provided by, for example, a plurality of grooves or slits extending in the axial direction of the inner peripheral surface of the brake member 1, a large number of gear-like teeth, a plurality of holes aligned in the circumferential direction, and the like. In the example shown in FIGS. 1 to 4, the engagement surface 13 is formed in a gear tooth shape provided on the inner peripheral surface of the member to be braked 1 adjacent to both sides in the axial direction of the braking surface 4.

  As shown well in FIG. 2, the engaging member 7 described above is provided at a position facing the engaging surface 13, and the portion of the engaging member 7 facing the engaging surface 13 An engagement portion 14 having a substantially complementary shape is provided so that the engagement surface 13 can be engaged with and engaged with the engagement surface 13. In the illustrated case, since the engaging surface 13 has a gear tooth shape, the engaging portion 14 is also shaped like a part of the gear.

  In such an elevator brake device, while the elevator is moving up and down, the electromagnetic device 12 of the brake device is energized as shown in FIG. The braking member 3 is held at an inoperative position separated from the member to be braked 1 via the engaging member 7 against the spring acting force.

  When the car approaches the landing, the excitation current of the electromagnetic device 12 is reduced by a command from a control device (not shown), the spring acting force of the spring member 10 is partially released, and the second suctioned by, for example, half of the stroke. As shown in FIG. 3, only the braking member 3 is pressed against the braking surface 4 as shown in FIG. 3, and the car is decelerated by a normal braking operation to stop.

  When the car is completely stopped, the excitation current of the electromagnetic device 12 is further reduced or completely eliminated by a command from the control device, so that the electromagnetic device 12 is in the third position shown in FIG. 4 and all the spring acting force of the spring member 10 is released. Then, the braking member 3 is pressed against the braking surface 4 and the engaging member 7 is engaged with the engaging surface 13.

  Summarizing such operations, when the electromagnetic device 12 is in the first position, as shown in FIG. 1, the braking member 3 is in the inoperative position and the engaging member 7 is in the non-engaged position. When the electromagnetic device 12 is in the second position, as shown in FIG. 2, the braking member 3 is in the operating position, and the engaging member 7 is in the non-engaging position. When the electromagnetic device 12 is in the third position, as shown in FIG. 4, the braking member 3 is in the operating position, and the engaging member 7 is in the engaging position. When resuming the raising and lowering of the car, the elevator braking device is operated in the reverse order to that described above to release the braking operation of the elevator brake device.

  Although one embodiment of the elevator brake device of the present invention has been described above, various changes and modifications of various parts are possible. For example, the spring between the braking member 3 and the engaging member 7 may be a leaf spring or a coil spring, and there is no limitation on the shape, and it may be a compression spring, a tension spring, or a torsion spring. The braked member 1 may be a disc type instead of a drum type, and a brake mechanism may be provided on the outer periphery of the drum type. Furthermore, the braking member 3 that is a brake shoe is not a rotary type pivotally supported by a pin, but may be a parallel movement type. In addition, the electromagnetic device operating at the three positions may be one that switches the current, or one that switches and uses a plurality of coils.

Embodiment 2. FIG.
5 to 7 schematically show another embodiment of the elevator brake device according to the present invention in which the braking member is translated. 5 is a front view of the elevator brake device in a released state, FIG. 6 is a cross-sectional view of the elevator brake device with the internal brake mechanism removed along line BB in FIG. 5, and FIG. It is a front view.

  In this elevator brake device, the engagement surface 21 of the member to be braked 1 is formed as a plurality of circular recesses provided in the central portion in the axial direction of the braking surface 4. The frame 22 is provided with an electromagnet portion 24 of an electromagnetic device 23. At the position shown in FIG. 5, the electromagnet portion 24 is excited and the movable iron core 26 is attracted against the spring acting force of the spring member 25 that is a compression coil. ing. The movable iron core 26 has a projecting rod 27, and a brake member 28, which is a brake shoe, is supported on the projecting rod 27 so as to be slidable in the axial direction of the projecting rod 27. A spring 29 which is a compression coil spring is provided between the movable iron core 26 and the braking member 28.

  A flange 30 that can slide in the cylindrical cavity 31 of the braking member 28 is provided at an intermediate portion of the protruding rod 27, and a distal end portion of the flange 30 is a plunger-like engagement member 32. 5 is movable between a non-engaged position that is slid in the brake member 28 and pulled into the brake member 28 as shown in FIG. 5, and an engaged position that protrudes from the brake member 28 as shown in FIG. is there. A compression spring 33 is provided between the flange 30 of the engagement member 32 and the braking member 28, and the plunger-like engagement member 32 is always biased to the non-engagement position.

  Thus, in this embodiment, the braking member 28 is supported so as to be movable in parallel with the member to be braked 1, and the engaging member 32 is provided when the braking member 28 is in the braking position of FIG. One end protrudes from the braking member 28 to engage with the engaging surface 21 (FIG. 7), and the non-engaging position separated from the engaging surface 21 even when the braking member 28 is in the braking position (FIG. 7). 5) and movable.

1 is a schematic plan view showing an embodiment of an elevator brake device according to the present invention in a released state. It is a schematic sectional drawing in alignment with line AA of FIG. It is a schematic front view of the braking state of the brake device for elevators of FIG. It is a schematic front view of the stop state of the brake device for elevators of FIG. It is a schematic plan view which shows another embodiment of the brake device for elevators of this invention in a release state. FIG. 6 is a schematic sectional view showing the internal brake mechanism removed along line BB in FIG. 5. It is a schematic front view of the stop state of the brake device for elevators of FIG.

Explanation of symbols

  1 Braked member, 3, 28 Braking member, 4 Braking surface, 7, 32 Engaging member, 8, 33 Spring, 10, 25 Spring member, 12, 23 Electromagnetic device, 13, 21 Engaging surface.

Claims (3)

A member to be braked, an operating position for braking in contact with the member to be braked, a braking member supported so as to be movable to an inoperative position spaced apart from the member to be braked, and a spring member for biasing the braking member to an always operating position In an elevator brake device including an electromagnetic device that moves the braking member from the operating position to the non-operating position against the acting force of the spring member,
The brake member includes a brake surface that is pressed when the brake member is braked, and an engagement surface that is provided in or near the brake surface and has a component perpendicular to the moving direction of the brake member. And
The elevator brake device further includes:
A non-engagement position provided on the brake member and spaced from the member to be braked, and an engagement position that engages with the engagement surface of the member to be braked only when the brake member is in the operation position. An engaging member movably supported;
A spring provided between the braking member and the engaging member and constantly biasing the engaging member to the disengaged position;
The electromagnetic device includes a first position that holds the braking member together with the engagement member at the inoperative position spaced from the braking surface against the spring acting force of the spring member, and the spring acting force of the spring member. A second position where only the braking member is pressed against the braking surface by partially releasing the spring, and the spring acting force of the spring member is fully released to press the braking member against the braking surface and the engagement member The elevator brake device is movable to a third position for engaging the engagement surface with the engagement surface.   The brake member is rotatably supported at one end, and the engagement member is rotatably supported at the other end of the brake member, and is connected to the spring member and the electromagnetic device. It is movable between an engagement position that engages with the engagement surface when the braking member is in the braking position, and a non-engagement position that is separated from the engagement surface when the braking member is in the braking position. The elevator brake device according to claim 1, wherein the elevator brake device is provided.   The braking member is supported so as to be movable in parallel with the braked member, and the engaging member protrudes from the braking member at one end when the braking member is in the braking position. 2. The elevator according to claim 1, wherein the elevator is movable between an engagement position that engages with the brake member and a non-engagement position that is separated from the engagement surface even when the brake member is in the brake position. Brake device.

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