JPH09242787A - Electromagnetic brake and elevator device mounted with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fixed stagnation, and enhance reliability by eliminating one-sided contact of a slidingly movable connecting part of a shaft to support an electromagnet main body. SOLUTION: A guide shaft 21 is arranged between the other ends of a pair of arms 2a and 2b by penetrating through a pair of electromagnets 28a and 28b, and one end of the guide shaft 21 and the other end of one of a pair of arms 2a and 2b are rotatably joined together, and the guide shaft 21 and one of a pair of electromagnets 28a and 28b are joined together, and the other of a pair of electromagnets 28a and 28b is supported on the guide shaft 21, and the other end of the guide shaft 21 and the other end of the other of a pair of arms 2a and 2b are joined together so that the other ends of the arms 2a and 2b can freely rotate and the guide shaft 21 can slidingly freely move.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electromagnetic brake and an elevator device equipped with this electromagnetic brake.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 7-2452, an elevator apparatus equipped with an electromagnetic brake has a cage and a counterweight guided by guide rails connected by a rope. .

In this disclosed example, a linear motor provided on a counterweight moves up and down, and an electromagnetic brake applies a brake to a guide rail.

The structure of the electromagnetic brake mounted on this elevator device is disclosed in, for example, Japanese Patent Laid-Open No. 4-203628, and is shown in FIGS. 8 to 9. In these figures, the electromagnetic brake 17 is arranged to brake by sandwiching the guide rail 1 extending in the direction perpendicular to the plane of FIG.

Further, a pair of arms 2a, 2b is constructed so that the support portions 3 projecting from the intermediate portions thereof are rotatably coupled via a support shaft 4 so that the sandwiched portion of the guide rail 1 can be opened and closed. There is.

A back plate 6 having a brake shoe 7 attached thereto is attached to one end of each arm 2a, 2b by a bolt 5.

On the other hand, as shown in FIG. 9, concave notches 8 are formed at the other ends of the arms 2a, 2b, and the outer ends of the shaft pieces 9a, 9b constituting the expandable shaft 9 are respectively provided with the pins 16 therebetween. And is rotatably supported. Then, the inner ends of the shaft pieces 9a and 9b are slidably inserted into the insertion holes 10 formed in the inner ends of the shaft pieces 9a and 9b. That is, the structure is such that the fishing rod is connected. A pair of electromagnet bodies 11a and 11b are fixed to the shaft pieces 9a and 9b, and both have a movable structure. A spring 1 is provided between the electromagnet bodies 11a and 11b.
2 are interposed. The coil 13 is provided on the electromagnet body 11b.
Is built in.

The electromagnetic brake 17 is attached by connecting the support shaft 4 to an elevating body which is a body to be braked (not shown). In the electromagnetic brake 17, when the electromagnet bodies 11a and 11b are not biased, the spring 1
Since the other ends of the arms 2a and 2b are separated from each other by the urging force of 2, the one ends of the arms 2a and 2b are in a braking state with the guide rail 1 interposed therebetween. Electromagnet body 11a, 11b
When biased, the electromagnet body 1 is resisted against the releasing force of the spring 12.
1a and 11b will attract each other, and arms 2a and 2b
One end of opens and goes into non-braking state.

An electromagnet for a drum-type electromagnetic brake for an elevator is disclosed in, for example, Japanese Patent Laid-Open No. 57-55283.

In this disclosed example, the electromagnet is not directly supported by the brake arm but is installed at another position and the movement of the electromagnet is transmitted to the brake arm via the lever. Further, the electromagnet is composed of a coil, a fixed iron core and a movable iron core, and is basically different in configuration from the above-mentioned conventional examples shown in FIGS.

[0011]

In the case of the conventional example shown in FIGS. 8 and 9, since the pair of electromagnet main bodies are connected by the telescopic shaft formed of the shaft pieces, the pair of arms are intermittently supported. Because of this and a certain amount of clearance required for sliding of the expansion / contraction shaft, the electromagnet body will be bent at the connecting portion of the expansion / contraction shaft due to its own weight. As a result, the sliding connection portion of the shaft piece comes into partial contact, and not only the connection portion is unevenly worn, but when the wear further progresses, the sliding connection portion becomes uncomfortable and the electromagnet cannot be attracted and released. That is, there is a problem that the electromagnetic brake cannot be opened and closed normally, and the elevator cannot be run or stopped.

The present invention has been made in view of the above circumstances, and an electromagnetic brake having high reliability by preventing uneven contact of a sliding connection portion of a shaft for supporting an electromagnet main body to prevent astringency is provided. It is an object to provide an elevator device equipped with an electromagnetic brake.

[0013]

In order to achieve the above object, an electromagnetic brake of the present invention is provided with a support shaft on an elevating / lowering body which is an object to be braked, and a substantially intermediate portion thereof is rotatable through the support shaft. A pair of arms are coupled to each other, and a brake element sandwiching a guide rail for guiding the elevating body is fixed to one end of each pair of arms, and a pair of electromagnets is attached to the other ends of the pair of arms. In the electromagnetic brake configured to drive the pair of arms by the elastic force of the spring interposed between the pair of arms and the electromagnetic force of the pair of electromagnets, the electromagnetic brake is penetrated through the pair of electromagnets. A guide shaft is provided between the other ends of the pair of arms, and one end of the guide shaft and one end of the pair of arms are rotatably coupled,
The guide shaft and one of the pair of electromagnets are coupled to each other, the other of the pair of electromagnets is supported on the guide shaft, and the other end of the guide shaft and the other end of the pair of arms are connected to the arm. The other end of the guide shaft is rotatably connected and the guide shaft is slidably connected.

Further, in order to achieve the above object, the elevator apparatus of the present invention is an elevator apparatus in which a guide rail is erected in a hoistway, and elevators such as a car and a counterweight move up and down along the guide rail. At
It is characterized in that the electromagnetic brake having the above configuration is mounted.

[0015]

FIG. 1 is a block diagram showing an embodiment of the present invention.
It will be described with reference to FIG. The same parts as those of the conventional example shown in FIGS. 8 and 9 are designated by the same reference numerals for description.

1 and 2 show the overall construction of the electromagnetic brake according to the present invention, and FIG. 3 is a side view showing the construction of the electromagnet section in FIG. 4 and 5 are explanatory views showing the structure of a shaft provided between the other ends of the pair of arms.

In these drawings, the electromagnetic brake 51 is adapted to hold the guide rail 1 extending in the direction perpendicular to the plane of the paper of FIG. The pair of arms 2a, 2b
The support portions 3 projecting from the intermediate portion are rotatably connected via a support shaft 4 so that they can be opened and closed.

A back plate 6 having a brake shoe 7 mounted thereon is attached to one end of each arm 2a, 2b by a bolt 5.

On the other hand, a concave cutout portion 8 is formed at the other end of the arms 2a and 2b as shown in FIG. 2, and a guide shaft 21 is provided between the other ends of the arms 2a and 2b. One end of the guide shaft 21 and one of the other ends of the arms 2a and 2b are rotatably connected by a pin 22, and the other end of the guide shaft 21 has an elongated hole 24 of the guide shaft 21 shown in FIGS. Through, the other ends of the arms 2a and 2b are connected by a pin 23. As a result, the other ends of the arms 2a and 2b are rotatably connected, and the guide shaft 21 is slidably connected.

Further, the other end of the guide shaft 21 is provided with a U-shaped notch 25 shown in FIG. 5, and the other end of the other arm 2a, 2b is passed through this notch 25 as described above. And may be coupled by the pin 23.

The guide shaft 21 is screwed to the flange 26, and is fixed by the rotation stopping member 27. Then, one electromagnet 28a forming a pair of electromagnet main bodies 28a, 28b is fixed to the flange 26 with a bolt 29, and the other electromagnet 28b of the electromagnet main bodies 28a, 28b is
The guide shaft 2 with the magnetic pole facing the one electromagnet 28a.
It is slidably supported on the bearing 1 via a bearing 30. The flange 31 provided on the other electromagnet 28b and the other ends of the arms 2a and 2b are rotatably coupled by the pin 23.

Further, the spring 12 is interposed between the electromagnet main bodies 28a and 28b, and both electromagnets 28a and 28b have a movable structure.

Further, coils 32a and 32b are built in the electromagnet bodies 28a and 28b, respectively. Then, the releasing force of the spring 12 causes a force to spread between the other ends of the arms 2a and 2b, and the brake element 7 causes the guide rail 1 to move.
Press to obtain the braking force.

The electromagnetic brake 51 is attached by connecting the support shaft 4 to the lifting body 33, which is the body to be braked. In the electromagnetic brake 51, the electromagnet main body 28
When a and 28b are not urged, the other end of the arms 2a and 2b are separated from each other by the urging force of the spring 12, so that one end of the arms 2a and 2b is in a braking state with the guide rail 1 interposed therebetween. Become.

When the electromagnet bodies 28a, 28b are biased, the electromagnet bodies 28a, 28 are resisted against the releasing force of the spring 12.
As a result of b being attracted to each other, one end of each of the arms 2a and 2b is opened and a non-braking state is established.

In this embodiment, an example in which the spring 12 is built in the electromagnet has been described.
It may be provided outside a and 28b. In addition, the electromagnet body 2
The coil 32a or the coil 32 is provided on one of 8a and 28b.
b may be incorporated.

Next, an embodiment of an elevator system equipped with the electromagnetic brake 51 will be described.

FIG. 6 is a front view of the elevator apparatus according to the present invention, and FIG. 7 is a side view thereof.

In FIG. 6 and FIG. 7, 41 is a car which is an elevator of the elevator device, 42 is a counterweight of the elevator which is formed in a square shape, 43 is a rope, and rope 43
Is hung on a pulley 45 attached to the top of the hoistway 44, and the car 41 and the counterweight 4 are attached to both ends of the rope 43.
Two are connected in a slip-like shape.

Reference numeral 46 is a guide rail laid on both sides of the counterweight 42 over the entire length of the hoistway 44, and 47 is the car 4
1, a counterweight 42, and other guide members provided at the four corners of the lifting body, and are engaged with the guide rails 46.

Reference numeral 48 is a mover of a linear motor, and a counterweight 4
It is provided in 2. 49 is a linear motor stator,
Facing the counterweight 42 and the mover 48 of the linear motor, it is laid over the entire length of the hoistway 44, and its upper end and lower end are connected to the building 50. Reference numeral 51 denotes the above-described electromagnetic brake that is provided on the counterweight 42 and that brakes with the guide rail 46.

In the above structure, the driving force is generated by the electromagnetic force between the mover 48 and the stator 49 of the linear motor, so that the counterweight 42 is driven by using the guide rail 46 as a guide to move the car 41 up and down. . The braking of the car 41 is performed by the car 41 and the counterweight 4 as described above.
Since the two are connected by the rope 43, braking can be performed by the electromagnetic brake 51 provided on the counterweight 42.

According to this embodiment, a guide shaft is provided between the other ends of the pair of arms penetrating the pair of electromagnets, and one end of the guide shaft and the other end of the pair of arms are rotatable. Coupled to the guide shaft and one of the pair of electromagnets, and supporting the other of the pair of electromagnets on the guide shaft, and the other end of the guide shaft and the other of the pair of arms. Since the end and the other end of the arm are rotatably connected and the guide shaft is slidable, the sliding connection portion of the shaft supporting the electromagnet main body is eliminated. Thus, it is possible to obtain a highly reliable electromagnetic brake and an elevator device equipped with this electromagnetic brake, which can prevent solidification.

[0034]

As described above, according to the present invention, the guide shaft is provided between the other ends of the pair of arms through the pair of electromagnets, and one end of the guide shaft and one of the pair of arms are provided. The other end of the guide shaft and one of the pair of electromagnets, and the other of the pair of electromagnets is supported on the guide shaft, and the other end of the guide shaft and the Since the other end of the pair of arms is connected so that the other end of the arm is rotatable and the guide shaft is slidable, sliding of the shaft supporting the electromagnet body is performed. It is possible to obtain a highly reliable electromagnetic brake and an elevator device equipped with this electromagnetic brake, which eliminates uneven contact of the connection portion to prevent astringency.

[Brief description of drawings]

FIG. 1 is a plan view showing an overall configuration of an electromagnetic brake according to the present invention.

FIG. 2 is a front view of the electromagnetic brake according to the present invention shown in FIG.

FIG. 3 is a side sectional view showing a configuration of an electromagnet portion in the electromagnetic brake according to the present invention shown in FIG.

4 is a diagram showing an example of a structure of a guide shaft of an electromagnet portion in the electromagnetic brake according to the present invention shown in FIG.

5 is a diagram showing another example of the structure of the guide shaft of the electromagnet portion in the electromagnetic brake according to the present invention shown in FIG.

FIG. 6 is a front view showing the configuration of the elevator apparatus according to the present invention.

FIG. 7 is a side view of the elevator apparatus according to the present invention shown in FIG.

FIG. 8 is a plan view showing the overall configuration of a conventional electromagnetic brake.

9 is a front view showing the conventional electromagnetic brake shown in FIG.

[Explanation of symbols]

 1 guide rail 2a arm 2b arm 4 support shaft 7 brake element 11a electromagnet 11b electromagnet 12 spring 17 electromagnetic brake 21 guide shaft 22 pin 23 pin 21 long hole 25 U-shaped notch 26 flange 28a electromagnet 28b electromagnet 33 lifter 41 ride Basket 42 counterweight 46 guide rail

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Eiichi Sasaki, Inventor 1070 Ma, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Mito Plant

Claims (7)

[Claims] 1. A support shaft is provided on an elevating body that is a body to be braked,
A pair of arms rotatably coupled to each other through the support shaft is rotatably provided, and a brake element sandwiching a guide rail for guiding the elevating body is fixed to one end of each of the pair of arms.
A pair of electromagnets are attached to the other ends of the pair of arms, and the pair of arms are driven by the elastic force of a spring interposed between the pair of arms and the electromagnetic force of the pair of electromagnets. In the electromagnetic brake, a guide shaft is provided between the other ends of the pair of arms through the pair of electromagnets, and one end of the guide shaft and one other end of the pair of arms are rotatably coupled to each other. Connecting the guide shaft and one of the pair of electromagnets, supporting the other of the pair of electromagnets on the guide shaft, and connecting the other end of the guide shaft and the other end of the pair of arms to each other. An electromagnetic brake in which the other end of the arm is rotatably coupled and the guide shaft is slidably coupled. 2. A round hole is provided at one end of the guide shaft, rotatably coupled to one other end of the pair of arms by a pin, and an elongated hole is provided at the other end of the guide shaft in the axial direction. The electromagnetic brake according to claim 1, wherein the electromagnetic brake is inserted into the elongated hole and supported by the other end of the pair of arms by the pin. 3. A round hole is provided at one end of the guide shaft, is rotatably coupled to one other end of the pair of arms by a pin, and is U-shaped in the axial direction at the other end of the guide shaft. The electromagnetic brake according to claim 1, wherein a cutout portion is provided, and the cutout portion is inserted and supported by the other end of the pair of arms by a pin. 4. The electromagnetic brake according to claim 1, wherein one of the pair of electromagnets and the guide shaft are connected to one end side of the guide shaft via a flange screwed. 5. The other end of the pair of arms and the other end of the pair of electromagnets and the other end of the guide shaft are pinned so that the other end of the pair of arms is rotatable and the guide is provided. The electromagnetic brake according to claim 1, wherein the shaft is slidably coupled. 6. The electromagnetic brake according to claim 1, wherein the spring is interposed between the pair of electromagnets. 7. A guide rail is erected in the lifting circuit,
An elevator apparatus configured such that an elevating body such as a car and a counterweight moves up and down along the guide rail, wherein the elevating body is equipped with the electromagnetic brake according to any one of claims 1 to 6. Elevator equipment.