JPH10129958A - Electromagnetic brake device and elevator device loading electromagnetic brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic brake device and an elevator device loading that which are suitable to reduce the size in the direction between a pair of guide rails, without making an electromagnetic force generating means in an elliptical form. SOLUTION: A support shaft 2 is provided to the horizontal frame 1 of an elevating body being a braked body, a horizontal frame 3 is provided to the other end of the support shaft 2, and a pair of arms 4a of an electromagnetic brake and the like are installed rotatable to about the middle part of the support shaft 2. To each one end of the pair of arms 4a and the like, a brake sliding member 6 to hold a guide rail 5 which guides the elevating body installing the electromagnetic brake is fixed, and a brake control means 9 including two electromagnetic force generating means 7a and 7b, and a compression spring 8 provided to the outer side of the means 7a and 7b, provided between the means, concretely, is installed to each other side end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Generally, in a rope elevator,
On both ends of a main rope hanging on a pulley installed at the upper part of the hoistway, a car and a counterweight are connected in a slick manner.
Among such rope type elevators, in a linear motor drive elevator whose drive system is a linear motor,
A primary coil of a linear motor is installed on a counterweight which is a hoisting body, and a secondary conductor is correspondingly installed vertically along a hoistway. In such a linear motor driven elevator, a relative propulsive force is generated between the secondary conductor and the primary coil by exciting the primary coil of the linear motor mounted on the counterweight, and the propulsive force causes a balance. A weight runs up and down the hoistway along the secondary conductor. On the other hand, the car is lifted and lowered in accordance with the running operation of the counterweight because it is connected to the counterweight by a main rope laid on a pulley provided at the upper part of the hoistway.

The structure of an electromagnetic brake used in such a linear motor driven elevator is disclosed in, for example,
No. 107833 discloses this. The electromagnetic brake includes a support shaft extending vertically and having flanges above and below, a pair of arms rotatably fitted to the support shaft at a central portion in the vertical direction, and one end of each of the pair of arms. A brake sliding member fixedly opposed to the counterweight so as to sandwich the guide rail for the counterweight from both sides, a pair of electromagnets fixed to the other ends of the pair of brake arms, and a pair of electromagnets; It comprises a compression spring for a brake inserted between opposing parts, and connects upper and lower flanges of the support shaft to a counterweight. The electromagnet is composed of, for example, a circular iron core made of cast iron and an electromagnetic coil, and a flat doughnut-shaped coil housing groove on the outer peripheral side and a circular spring housing groove in the center are formed by cutting on the flat opposing surface of the iron core. And an electromagnetic coil in the coil storage groove of each iron core,
Further, a compression spring is housed over the spring housing grooves of both iron cores.

In the electromagnetic brake constructed as described above, when the electromagnetic coil of the electromagnet is not excited,
One end of the arm on the electromagnet side is expanded by the pressing force of the compression spring, and the brake sliding material is pressed against both sides of the guide rail to be in a braking state. Further, when the electromagnetic coil of the electromagnet is excited, the electromagnet is attracted to each other while compressing the compression spring by the electromagnetic force, so that the brake sliding material is separated from the guide rail and the braking state is released.

[0005]

The problem with the above brake is that the direction from one of the pair of guide rails to the other (hereinafter, this direction is referred to as the direction between the pair of guide rails).
Of the electromagnetic brake is large. In a counterweight linear motor driven elevator, the electromagnetic brake is installed between the secondary conductor and the counterweight guide rail. For this reason, if the dimension of the electromagnetic brake is large in the direction between the pair of guide rails, the interval between the pair of guide rails must be increased, and the occupied area of the hoistway increases.

[0006] Further, as disclosed in Japanese Patent Application Laid-Open No. 5-78060, a counterweight linear motor driven elevator in which the secondary conductor has a flat plate shape and the pair of guide rails has a large dimension in the direction of the guide rails has the above tendency. Becomes noticeable. Therefore, in the counterweight linear motor driven elevator, in order to reduce the occupied area of the hoistway,
The size of the counterweight in the direction between the pair of guide rails must be further reduced without changing the braking force of the electromagnetic brake.

To solve the above problems, Japanese Patent Laid-Open No. 7-27
There is a system using an elliptical electromagnetic coil that is long in the vertical direction as disclosed in US Pat. In this method, the electromagnetic coil must be manufactured in an oval shape. The shape of this elliptical electromagnet is that the cutting process is difficult when forming the coil housing groove in the iron core, and the leakage magnetic flux is larger than when the electromagnet is formed in a circular shape due to the large circumference of the electromagnet. There is a problem that the suction efficiency is deteriorated.

An object of the present invention is to provide an electromagnetic brake device suitable for reducing the size in the direction between a pair of guide rails without having to make the electromagnetic force generating means oval as described above, and an elevator equipped with the electromagnetic brake device. The purpose of the present invention is to provide a monitoring device.

[0009]

According to one aspect, an electromagnetic brake device according to the present invention includes a support shaft provided on a lifting / lowering body, and a pair of arms. The arm is rotatably supported by the support shaft at a predetermined position between both ends thereof, and one end of the pair of arms is connected to the elevating body via a guide rail for guiding the elevating body. A braking unit for applying and releasing braking by means of a braking unit. Braking control means is provided on the other end side of the pair of arms. The braking control means includes a spring for generating a resilient force for braking; And a plurality of electromagnetic force generating means for generating an electromagnetic force that overcomes the elastic force, wherein the plurality of electromagnetic force generating means are arranged along the guide rail.

According to another aspect of the electromagnetic brake device of the present invention, the electromagnetic brake device includes a support shaft provided on a lifting / lowering body, and a pair of arms. At a predetermined position, is rotatably supported by the support shaft, and one ends of the pair of arms apply braking to the elevating body via guide rails for guiding the elevating body. A brake control unit is provided at the other end of the pair of arms. The brake control unit overcomes the spring force by generating a spring force for braking. A plurality of electromagnetic force generating means for generating an electromagnetic force,
The spring is arranged outside each of the plurality of electromagnetic force generating means, and the plurality of electromagnetic force generating means is arranged along the guide rail.

Another feature of the present invention resides in that the above-described electromagnetic brake device is mounted on an elevator device.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG.

Referring to FIGS. 1 to 3, in one embodiment of the electromagnetic brake device of the present invention, a support shaft 2 is provided on a horizontal frame 1 of an elevating body (corresponding to a counterweight described later) which is a braked body. At the other end of the shaft 2, a horizontal frame 3 is provided. The pair of arms 4a and 4b have a support shaft 2 substantially at the center between their ends.
It is rotatably supported by. A pair of arms 4
a guide rail 5 for guiding the elevating body at one end of
The brake sliding member 6 is fixedly provided. Therefore, one end of the pair of arms 4a and 4b is connected to the guide rail 5
And a braking unit that applies and releases braking to the elevating body via the control unit. On the other hand, a braking control means 9 is provided at the other end of the pair of arms 4a and 4b. Braking control means 9
Includes a compression spring 8 for generating a resilient force for braking, and two electromagnetic force generating means 7a and 7b each having a circular cross section for generating an electromagnetic force that overcomes the resilient force. Are arranged along the guide rail 5, and the two electromagnetic force generating means 7a and 7b are each a pair of circular electromagnets 7a and 7b.
a-1, 7a-2 and 7b-1, 7b-2. The pair of electromagnets 7a-1 and 7a-2 are
a-1a, 7a-2a, and electromagnetic coils 7a-1b, 7a-2b housed in donut-shaped coil grooves provided on the opposing surfaces of the iron core facing each other. Similarly, the pair of electromagnets 7b-1 and 7b-2 are respectively iron cores 7b-1.
a, 7b-2a, and electromagnetic coils 7b-1b, 7b-2b housed in donut-shaped coil grooves provided on opposing surfaces of the iron core facing each other. The compression spring 8 is disposed outside the two electromagnetic force generating means 7a, 7b, specifically, between them.

The braking control means 9 further passes through a center of the spring 8 and a pair of supports 18a, 18b between which a compression spring 8 and two electromagnetic force generating means 7a, 7b are disposed, respectively, and further comprises a pair of supports. An arm guide shaft 11 penetrating through 18a and 18b is included.

At the other ends of the pair of arms 4a and 4b, concave notches 10 are respectively formed, and both ends of the arm guide shaft 11 are respectively engaged with the notches. A
One end of the arm guide shaft 11 is rotatably connected to the other end of one of the pair of arms 4a by a pin 12, and the other end of the arm guide shaft 11 passes through the elongated hole 13 of the arm guide shaft 11. It is connected to the support 18b by the pin 14. Further, the arm guide shaft 11 is fixedly connected to the support 18a by the flange 15 and is slidably supported by the support 18b.

In the electromagnetic brake device constructed as described above, the pair of electromagnets 7 of the electromagnetic force generating means 7a and 7b are used.
When the electromagnetic coils 7a-1b, 7a-2b and 7b-1b, 7b-2b of a-1, 7a-2 and 7b-1, 7b-2 are not excited, respectively, a pair of arms 4
The respective ends of the electromagnets a and b are expanded by the pressing force (resilient force) of the compression spring 8, and the brake sliding member 6 is pressed against both sides of the guide rail 5 to be in a braking state. On the other hand, a pair of electromagnets 7a-1, 7a-2 and 7b-1, 7
b-2 electromagnetic coils 7a-1b, 7a-2b and 7b-
When 1b, 7b-2b are excited, their electromagnets overcome the elastic force of the compression spring 8 and
Are compressed with each other, and the brake sliding member 6 is pulled away from the guide rail 5 to release the braking state.

Generally, the braking control means in the electromagnetic brake device includes a circular iron core made of, for example, cast iron, an electromagnetic coil, and a compression spring. Circular compression spring storage grooves are formed in the center by cutting, respectively. An electromagnetic coil is stored in the coil storage groove of each iron core, and a compression spring is stored in the spring storage groove of both iron cores.

However, the method of accommodating the compression spring in the electromagnet enlarges the outer periphery of the electromagnet, and in the electromagnetic brake device having the above structure, the dimension of the elevating body in the direction between the left and right guide rails is inevitably increased.

Therefore, in the embodiment of the present invention, the two electromagnetic force generating means 7a, 7 generate the electromagnetic force, which is normally generated by one electromagnetic force generating means, which overcomes the pressing force of the compression spring 8.
b, the size of each electromagnetic force generating means can be reduced. Therefore, the two electromagnetic force generating means 7a and 7b are connected to the guide rail 5 as shown in FIG.
, And as a result, the overall dimension in the direction between the guide rails can be reduced. Further, since the compression spring 8 for generating a pressing force on the guide rail 5 is arranged outside the electromagnetic force generating means 7a, 7b, the compression spring 8 is arranged inside the electromagnetic force generating means as usual. The size of the electromagnetic force generating means 7a, 7b can be reduced as compared with the case, and therefore the size in the direction between the guide rails as a whole can be reduced. As described above, the use of the two electromagnetic force generating means and the arrangement of the compression spring outside the electromagnetic force generating means contribute to the reduction in the size of the entire apparatus in the direction between the guide rails.

Each of the electromagnetic force generating means 7a and 7b has an electromagnet guide shaft 19 for guiding an electromagnet.
The electromagnet guide shaft 19 prevents the electromagnetic force generating means 7a, 7b from rotating around the arm guide shaft 11. Therefore, the coupling surfaces of the pair of electromagnets in each of the electromagnetic force generating means 7a and 7b that can be magnetically coupled to each other are maintained in a constant coupling relationship.

FIG. 4 shows a brake control means of an electromagnetic brake device showing another embodiment according to the present invention.
It is shown in a sectional form similar to FIG. The difference between this embodiment and the embodiment shown in FIG. 3 is that the electromagnetic force generating means 7a comprises a pair of electromagnets 7a-1 and 7a-2 in FIG. 3, whereas the electromagnet 7a-1 in FIG. And a plate-like magnetic material magnetically attracted by the electromagnet. Similarly, in FIG.
-1 and 7b-2, whereas in FIG.
b-1 and a plate-like magnetic material attracted by the electromagnet, and the magnetic materials are a pair of supports 18a,
18b is also used by one 18b.

The electromagnet 7a of the support 18b, which is a magnetic material,
The size a of the surface facing -1, 7b-1 is the electromagnet 7a-
The outer diameter b is set to be larger than the outer diameter b of 1, 7b-1. Also, a gap 21 is provided at the joint between the electromagnet guide shaft 19 and the support 18b, which is a magnetic material, so that the electromagnet guide shaft 19 and the support 18b can freely move in the left and right directions in the drawing. Has become. The gap 21 is set to be larger than the gap 22 at the penetrating portion of the arm guide shaft 11 with respect to the support 18b. Thereby, the electromagnet 7a-
1, 7b-1, the support 18b, which is a magnetic material, and the electromagnet guide shaft 19 can be easily manufactured. Also, because of the gap 21, the braking control means 9 can rotate about the arm guide shaft 11 by that much. However, the surface of the support 18b, which is a magnetic material, facing the electromagnets 7a-1 and 7b-1 can be rotated. Size a is electromagnet 7
Since the outer diameter b is set larger than the outer diameter b of a-1 and 7b-1, the electromagnetic force does not decrease. Electromagnet guide shaft 1
Numeral 9 has a detent effect of the braking control means 9 around the arm guide shaft 11.

FIG. 5 shows a braking control means of an electromagnetic brake device showing another embodiment according to the present invention, which is also shown in a sectional form similar to FIG. In this embodiment, the electromagnetic force generating means 7a, 7b are alternated. That is, the electromagnetic force generating means 7a is composed of a plate-like magnetic body 7a-11 and an electromagnet 7a-2 for magnetically attracting the magnetic body.
The electromagnetic force generating means 7b is composed of an electromagnet 7b-1 and a plate-like magnetic body 7b-22 which is electromagnetically attracted by the electromagnet 7b-1, and therefore, the arrangement relationship between the magnetic body and the electromagnet is The electromagnetic force generating means 7a and 7b are opposite to each other. The magnetic bodies 7a-11 and 7b-22 are fixed to the supports 18a and 18b, respectively, and the size (diameter) a of the magnetic body is set to be larger than the outer diameter b of the electromagnet as in the case of FIG. I have.

In the embodiment shown in FIG. 5, the electromagnetic force generating means 7a,
Since the imbalance of the mass of 7b is small, the suction force is evenly generated on the pair of supports 18a and 18b when the suction force is generated,
A uniform opening / closing force can be transmitted to the pair of arms 4a and 4b, and braking control can be performed efficiently.

The electromagnet guide shaft 19 is provided with electromagnetic force generating means 7a,
By providing the brake control means 9 on at least one of them (the electromagnetic force generating means 7a in the figure), a detent effect of the brake control means 9 around the arm guide shaft 11 can be obtained.

FIG. 6 shows a braking control means of an electromagnetic brake device showing still another embodiment according to the present invention, which is also shown in a sectional form similar to FIG. The feature of this embodiment with respect to the embodiment of FIG. 5 is that four electromagnetic force generating means 7a, 7b, 7c and 7d are used, two of which are above the arm guide shaft 11 and the other two. Are arranged below the arm guide shaft 11, respectively. For the sake of simplicity, in FIG. 6, reference numerals to be attached to respective parts or elements in each electromagnetic force generating means are omitted. Of course, the magnetic bodies 7a-10 and 7b-20 may be shared with the supports 18a and 18b.

According to the embodiment shown in FIG. 6, since the same electromagnetic force can be generated by four electromagnetic force generating means, each electromagnetic force generating means can be made more compact, and therefore, as a whole, Can be further reduced in the direction between the guide rails.

Next, an embodiment of an elevator apparatus equipped with the above-described electromagnetic brake device will be described.

FIG. 7 is a front view of the elevator apparatus of the present invention, and FIG. 8 is a side view. 7 and 8, the elevator apparatus includes a pulley 28 installed at the top of a hoistway 27 and a car 30 which is a hoisting body at both ends of a rope 29 hanged over the pulley 28 in a slidable manner.
And a counterweight 31 are provided. In addition, hoistway 27
A guide rail 32 is laid over the entire length of the car, and the car 30 as a lifting body and the counterweight 31 are engaged by guide means 33 provided at four corners thereof and can move in the vertical direction.
A secondary side 34 of the linear motor is laid on the hoistway 27 over the entire length thereof, and a primary side 35 of the linear motor is installed on the counterweight via the support 41 in correspondence with the secondary side. Balance weight 3 between primary side 35 and secondary side 34
1 generates a propulsive force in the vertical direction of the hoistway 27. Furthermore,
The counterweight 31 is provided with an electromagnetic brake device 36 of the present invention that generates a braking force between the counterweight 31 and the guide rail 5. Since the electromagnetic brake device 36 uses a plurality of electromagnetic force generating means and arranges the compression spring outside the electromagnetic force generating means, the dimension between the left and right guide rails 5, that is, the dimension e between the guide rails can be reduced. Accordingly, the dimension f of the hoistway 27 can be reduced, and the floor area of the building can be effectively used.

FIG. 9 is a front view showing the structure of a brake unit provided with the electromagnetic brake device of the present invention. This brake unit is an electromagnetic brake device 36 of the present invention,
It comprises a horizontal frame 37 and a detent rail 38. The detent rail 38 is installed on the horizontal frame 37 by a support member 39. Further, the support shaft 2 of the electromagnetic brake device 36 has a structure capable of sliding on the horizontal frame 37 in the left-right direction on the paper.
When installing the elevator, first, the brake unit is installed above or below the elevating body. Next, the detent rail 38 is removed, and the support shaft 2 is moved in the left and right guide rail directions in the plane of the paper, and then fixed to the horizontal frame 37, so that a braking force can be generated.

[0031]

According to the present invention, an electromagnetic brake device suitable for reducing the size in the direction between a pair of guide rails without having to make the electromagnetic force generating means oval, and an elevator equipped with the electromagnetic brake device. -An apparatus is provided.

[Brief description of the drawings]

FIG. 1 is a front view of an electromagnetic brake device showing an embodiment according to the present invention.

FIG. 2 is a partial cross-sectional view taken along the line II-II of FIG.
FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view similar to FIG. 3 of a braking control means of an electromagnetic brake device showing another embodiment according to the present invention.

FIG. 5 is a sectional view similar to FIG. 3 of a braking control means of an electromagnetic brake device showing another embodiment according to the present invention.

FIG. 6 is a sectional view, similar to FIG. 3, of a braking control means of an electromagnetic brake device showing still another embodiment according to the present invention.

FIG. 7 is a front view of an embodiment of an elevator device equipped with the electromagnetic brake device of the present invention.

FIG. 8 is a side view showing a partial cross section of FIG. 7;

FIG. 9 is an enlarged front view of the electromagnetic brake unit of FIG. 7;

[Explanation of symbols]

1, 3: horizontal frame, 2: support shaft, 4a, 4b: pair of arcs
5: Guide rail, brake sliding material, 7a, 7b:
Electromagnetic force generating means, 7a-1, 7a-2, 7b-1, 7b
-2: electromagnet, 8: compression spring, 9: braking control means, 1
0: Notch, 11: Arm guide shaft, 12: Pin, 1
4: pin, 15: flange, 18a, 18b: support,
27: hoistway, 28: pulley, 29: rope, 31: counterweight, 33: guide means, 34: secondary side of linear motor, 35: primary side of linear motor.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroshi Nagase 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside the Mito Plant of Hitachi, Ltd. Mito factory

Claims (5)

[Claims] A supporting shaft provided on the lifting body, and a pair of arms;
The pair of arms are rotatably supported by the support shaft at a predetermined position between both ends thereof, and one end of the pair of arms has a guide rail for guiding the elevating body. A braking unit for applying and releasing braking to the lifting / lowering body through a lever; and a braking control means provided at the other end of the pair of arms. A spring for generating an elastic force; and a plurality of electromagnetic force generating means for generating an electromagnetic force that overcomes the elastic force, wherein the plurality of electromagnetic force generating means are arranged along the guide rail. An electromagnetic brake device characterized by the above-mentioned. A support shaft provided on the lifting body, and a pair of arms.
The pair of arms are rotatably supported by the support shaft at a predetermined position between both ends thereof, and one end of the pair of arms has a guide rail for guiding the elevating body. A braking unit for applying and releasing braking to the lifting / lowering body through a lever; and a braking control means provided at the other end of the pair of arms. A spring for generating an elastic force, and a plurality of electromagnetic force generating means for generating an electromagnetic force that overcomes the elastic force, wherein the spring is disposed outside each of the plurality of electromagnetic force generating means; The electromagnetic force generating means is arranged along the guide rail. 3. The spring comprises a compression spring, and the braking control means includes a pair of supports between which the compression spring is disposed, and an arm guide shaft passing through the pair of supports. ,
The pair of supports are disposed between the pair of arms, the electromagnetic force generating means is disposed between the pair of supports, and the arm guide shaft is coupled to one of the pair of supports. 3. The electromagnetic brake according to claim 1, wherein the electromagnetic brake is slidably coupled to the other of the pair of supports, and further rotatably coupled to the pair of arms. apparatus. 4. The apparatus according to claim 1, wherein the spring comprises a compression spring, each of the plurality of electromagnetic force generating means includes at least one electromagnet for generating the electromagnetic force, and the braking control means includes the compression spring disposed therebetween. A pair of supports, an arm guide shaft penetrating the pair of supports, and an electromagnet coupled to the pair of supports for guiding the at least one electromagnet of each of the electromagnetic force generating means. A guide shaft, the pair of supports being disposed between the pair of arms, the electromagnetic force generating means being disposed between the pair of supports, and the arm guide shaft being disposed between the pair of supports. 4. The device according to claim 1, wherein said pair of arms are slidably connected to the other of said pair of supports, and further rotatably connected to said pair of arms. An electromagnetic brake device according to any one of the above. 5. A pulley, a rope wrapped around the pulley,
A rider connected to one end of the rope, a counterweight connected to the other end of the rope, a guide rail that engages and guides the counterweight, and is mounted on the counterweight. A linear motor having a primary coil and a secondary conductor arranged along the guide rail, the linear motor moving up and down the car by a propulsive force generated between the primary coil and the secondary conductor, and the car A brake device provided on the counterweight so that the brake device can be stopped.
An elevator device comprising the brake device described in any one of (1) to (4), wherein the lifting body in the brake device is the counterweight.