JPH0977396A - Braking device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a necessary and proper braking force by arranging a pair of arms, in each of which a brake shoe is fixed in the position facing a braked member, and an elastic member, in which one of the arms is brought close to the braked member by its elastic restoring force and frictional force is generated between the brake show and the braked member. SOLUTION: A braking device for an elevator is composed of an emergency arm supporting shaft 51, a washer 52, an elevating car holding elastic member 11 constructed, for example, of an elevating car holding compression spring and or an emergency braking elastic member 12 constructed, for example, of an emergency braking coil spring, an elastic member pressing device 13 generating proper braking force in an ordinary braking time and an emergency braking time individually, and additionally, a restoring device 14 returning the braking force of the braking device to an ordinary value after emergency braking, and by means of the elevating car holding elastic member 11 and the emergency braking elastic member 12, two kinds of braking force can be set. In this way, braking force for holding an elevating car can be properly generated in an ordinary time, while emergency braking force can be properly generated in the case of emergency, and restoring work from an emergency time to an ordinary time can be also surely carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braked member provided at a connecting portion between a sheave and a drive device in a slip-type elevator, and a brake shoe fixed to a pair of arms arranged on the outer peripheral side of the braked member. The present invention relates to an elevator brake device for obtaining a braking force for stopping an elevator car at a desired position by a frictional force generated between the elevator car and the elevator car.

[0002]

2. Description of the Related Art In a conventional elevator, as shown in FIG. 15, a sheave 1 is arranged above a hoistway in a building, and an elevator car 3 is attached to one end of a rope 2 wound around the sheave 1.
, The balance weight 4 is arranged at the remaining end, and the sheave 1 is driven by the electric motor 5
Driven by the frictional engagement between the rope 2 and the sheave 1, the driving force is transmitted to the rope 2 to raise and lower the elevator car 3 and the counterweight 4.

As for the brake device 6, the arm 8 is attached to the braked member 10 provided on a part of the connecting shaft connected between the sheave 1 and the electric motor 5 as described below.
The braking force is obtained by the action of the frictional force generated by the sliding contact of the brake shoe 9 of the above.

As shown in FIG. 16, the structure of the conventional brake device 6 is, for example, an elastic member 7 made of, for example, a coil spring, a pair of brake arms (arms) 8, and, for example, a brake fixed inside each arm. A pair of fixing members 9 composed of shoes, an arm support shaft 41, washers 42, 43, 44
Consists of That is, the pair of arms 8 are arranged so as to sandwich the member 10 to be braked, and each one end is rotatably supported by the pivot support pin 40. A fixing member 9 is fixed to the surface of each arm 8 that faces the outer peripheral surface of the braked member 10.

An arm support shaft 41 is provided so as to penetrate through both arms 8 on the other end side, and washers 42 and 43 are respectively screwed so as to sandwich the pair of arms 8 which are the arm support shaft 41. A washer 44 is fixed to the end of the arm support shaft 41 facing the washer 43, and the elastic member 7 is inserted into the arm support shaft 41 between the washer 44 and the washer 43 in a compressed state. The pair of arms 8 are configured to approach each other by the restoring force of the elastic member 7, and the frictional force between the fixed member 9 and the braked member 10 is thereby obtained.

Needless to say, a mechanical control mechanism utilizing the principle of leverage is provided between the arms 8 as a control mechanism for operating or inactivating the brake device. .

As described above, in the conventional brake device, the frictional force generated by pressing the fixed member 9 to the member 10 to be braked by the arm 8 is used as a braking force. It was used for braking.

However, in reality, although there is a difference in the magnitude of the required braking force between when the elevator car is held and when the emergency braking is applied, the conventional braking device 6 brakes both with the same braking force. Therefore, one or both of them cannot obtain an appropriate braking force. This is because the conventional brake device 6 has one elastic material 7
This is because the braking force is generated at.

[0009]

As described above, the conventional elevator brake device has a problem that it is difficult to secure an appropriate braking force according to the situation. The present invention has been made to eliminate such conventional problems, and an object of the present invention is to provide an elevator brake device that can obtain appropriate braking forces during holding of an elevator car and during emergency braking.

[0010]

The main constitution of the present invention for achieving the above object is as follows. The invention corresponding to claim 1 is that a sheave provided in the upper part of a hoistway in a building is rotatably supported, and a hoisting basket and a counterweight are connected in a slanting manner via ropes to raise and lower the hoisting car. In an elevator equipped with a drive device for operating the braking device, a member to be braked provided at a connecting portion between the sheave and the drive device, and a member to be braked which is arranged on an outer peripheral side of the member and is accessible to the braked member. A pair of arms each having a brake shoe fixed at a position facing the member, and one of the arms approaches the braked member due to its elastic restoring force, and a frictional force between the brake shoe and the braked member. A car-holding brake device for stopping the elevator car at a designated floor, and an elastic member that is provided so as to cause An elastic member provided so that the arm approaches the braked member and a frictional force is generated between the brake shoe and the braked member, and operates only when the power supply of the drive device is interrupted, An elevator having an emergency brake device for stopping the elevator car in an emergency, and a return device for returning the emergency brake device to an inoperative state when the power source is restored after the emergency brake device is operated. Brake device.

In order to achieve the above-mentioned object, the invention according to claim 14 is such that a sheave provided rotatably in the upper part of a hoistway in a building supports a hoisting cage and a counterweight via a rope. In an elevator equipped with a drive device for vertically moving the elevator car, the member to be braked provided at a connecting portion between the sheave and the drive device, and the braked member disposed on the outer peripheral side thereof. A pair of arms each of which has a brake shoe fixed at a position facing the member to be braked, and one of the arms approaches the member to be braked by the elastic restoring force of the arm. And a second elastic member. The first elastic member is provided so as to generate a frictional force between the shoe and the member to be braked, and a car holding brake device for stopping the elevator car at a designated floor is provided. A fixed-side and movable-side elastic member pressing member, a holder, a fixing pin, and a solenoid magnet, wherein the movable-side and fixed-side elastic member pressing members are arranged between the arms. Has a holding part for inserting the holding tool for holding the elastic material pressing members in a state of being close to each other, and the holding tool is provided with the elastic material pressing member. A state where the solenoid magnet has a pin insertion hole for inserting a fixing pin for preventing the fixing pin from coming off, and the solenoid magnet has the fixing pin connected to the armature and is normally energized to project the armature to the outside. And when the power source of the drive device is cut off, the armature is sucked inwardly, whereby the fixing pin comes out of the pin insertion hole of the holder. And emergency braking device to weaken the pressing force which the movable side elastic member material pressing member acts the arm by the restoring force of the elastic member to the braked member, a lift braking device having a.

According to the invention according to any one of claims 1 to 14, since the car holding brake device and the emergency braking device are provided, necessary and proper control is provided at the time of holding the elevator car and at the time of emergency braking, respectively. Power can be obtained.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 shows a first embodiment of the present invention. The difference from the conventional example of FIG. 16 is that the emergency arm support shaft 51, the washer 52, and the braking force are two. In order to set the type, for example, an elevator car holding elastic member 11 formed of an elevator car holding compression coil spring and an emergency braking elastic member 12 formed of an emergency braking coil spring, respectively, generate an appropriate braking force during normal braking and during emergency braking. An elastic material pressing device 13 for performing the operation and a returning device 14 for returning the braking force of the braking device to a normal value after emergency braking are added.

The other construction of the elevator car holding brake device is almost the same as that of the conventional example shown in FIG. Specifically, both arms 8 are provided with arm support shafts 41 so as to penetrate at the upper end side in the drawing, and washers 42, which are arm support shafts 41 and sandwich the pair of arms 8 are provided.
43 are respectively screwed and loosely inserted, and the arm support shaft 41
A washer 44 is fixed to an end portion of the washer 43 opposite to the washer 43, and an elastic material 11 for holding the elevator car is inserted into the arm support shaft 41 between the washer 44 and the washer 43 in a compressed state. The pair of arms 8 are configured to approach each other by the restoring force of the elastic coil spring 11 for holding, and the frictional force between the brake shoe 9 and the braked member 10 is thereby obtained.

The elastic material pressing device 13 is provided with a movable elastic pressing member 15a, a fixed elastic pressing member 15b, a holder 16 composed of a holding metal fitting, a winch 20, a solenoid magnet 18, and a fixing pin 17. There is.

The pair of elastic pressing plate members 15a and 15b are
Elastic material for emergency braking 1
The desired compression force (elastic material for holding the elevator car 1
A holding portion 1 for holding the elastic force of the elastic material 12 so as to obtain a compressive force larger than 1).
It has 5a1 and 15b1. The holding metal fitting 16 is inserted so as to penetrate the holding portions 15a1 and 15b1, respectively, and is for holding the interval between the elastic material pressing members 15a and 15b. A pin insertion hole 16a is formed in the holding metal fitting 16, and a fixed pin 17 whose one end is connected to an armature of a solenoid magnet 18 described later is inserted into or pulled out from the pin insertion hole 16a.
The solenoid magnet 18 has a coil and an armature, and the coil is normally energized, whereby the armature projects to the outside, the coil is deactivated in an emergency, and the armature is housed inside. The winch 20 can automatically or manually wind the rope 19 and applies a tensile force to the holding metal fitting 16 only when the power is restored,
To the original state, that is, the pin insertion hole 16 of the holding metal fitting 16
A return device is configured to allow the fixing pin 17 to be inserted into a.

The braking device of FIGS. 1 and 2 can be operated in the same manner as a conventional braking device only by the elastic material 11 for holding the elevator car during normal operation. Further, in an emergency, the energization of the solenoid magnet 18 shown in FIG. 2 is stopped, and the armature of the solenoid magnet 18 moves downward, so that the fixing pin 17 is pulled out from the holding metal fitting 16, so that the elastic pressing member 15a is subjected to emergency braking. The arm 8 (on the right side in FIG. 1) is moved along the emergency arm support shaft 51 so as to come into contact with the braked member 10 by the restoring force based on the compression of the elastic member 12 and is fixed inside the arm 8. The fixed member 9 is pressed against the braked member 10. Thereby, the braking force required for emergency braking can be generated.

As shown in FIG. 2, the restoring device 14 moves the elastic material pressing member 15a by winding the rope 19 fixed to the holding metal fitting 16 with the winch 20 to generate a braking force on the elastic material 12. Compress pin until there is no fixing pin 1
It can be fixed by 7, and the brake device can be returned to the normal state.

Therefore, in the elevator braking apparatus of the embodiment shown in FIGS. 1 and 2, it is possible to properly generate the braking force for holding the elevator car during normal operation, and the braking force for emergency braking during an emergency. You can surely perform the work of returning from time to normal.

<Second Embodiment> FIG. 3 shows a second embodiment of the present invention. As shown in FIG.
Similarly to the holding part 15a1 of the movable-side elastic material pressing member 15a
And the holding portion 15b1 of the fixed side elastic member pressing member 15b,
A holding metal fitting 21 having a substantially U-shaped cross section is provided so that it can be inserted and removed, and a roller 22 which is a friction reducing mechanism is arranged on an inner surface of the holding metal fitting 21 that is in sliding contact with the holding portions 15a1 and 15b1. The holding metal fitting 21 is supported and fixed to the armature of the solenoid magnet 18 fixed to the fixing portion as in FIG.

In the elevator brake device constructed as shown in FIG. 3, when the solenoid magnet 18 is de-energized in an emergency, the armature of the solenoid magnet 18 moves downward and the elastic member pressing members 15a and 15b are held. 15a
1, 15b1 are pulled out, the elastic material pressing member 15a is brought closer to the braked member 10 side by the restoring force of the elastic material 12 for emergency braking, and the fixing member 9 of the arm 8 is held by the braked member 10. It is pressed against and acts as an emergency braking device. In this case, since the rollers 22 are arranged on the inner surface of the press fitting 21, the holding portions 15a1, 1
Since the frictional force when the pressing metal fitting 21 is pulled out from 5b1 is reduced by the rollers 22, the elastic material pressing member 15a can be reliably opened with a small force. Since the elastic member pressing member 15a is opened in this manner, it is possible to obtain appropriate braking forces for holding the elevator car and for emergency.

Although not shown in FIG. 3, a winch 2 having a rope 19 is provided as a returning device for returning the elastic material pressing member 15a to its original state, as in FIG.
0 is provided, whereby the elastic material pressing member 15 is provided.
As shown in FIG. 3, the elastic members 12 can be compressed by returning a and 15b.

<Third Embodiment> FIG. 4 shows a third embodiment of the present invention. As shown in FIG. 4, one end of the opening lever 24 is rotatably supported by the pivotal support portion 45, and the other end of the opening lever 24 is supported by the armature of the solenoid magnet 18 fixed to the fixing portion as described above. A pair of pressing fittings 23 having a triangular cross section are fixed to the center of the opening lever 24. Between the holding metal fittings 23, the holding portion 15a1 of the movable side elastic material holding member 15a and the holding portion 15 of the fixed side elastic material holding member 15b are provided as in FIG.
It is configured such that b1 can be sandwiched.

In the elevator brake device constructed as shown in FIG. 4, the armature of the solenoid magnet 18 moves downward due to the demagnetization of the solenoid magnet 18 in an emergency, so that the opening lever 24 rotates about the pivot 45 as a fulcrum. The holding metal fitting 23 moves away from the holding portions 15a1 and 15b1. As a result, the elastic member pressing member 15a is brought closer to the braked member 10 side by the restoring force of the emergency braking elastic member 12, and the fixing member 9 provided on the arm 8 is locked by the braked member 10.
It is pressed against and acts as an emergency braking device.

Although not shown in FIG. 4, a winch 2 having a rope 19 is provided as a returning device for returning the elastic member pressing member 15a to its original state, as in FIG.
0 is provided, whereby the elastic material pressing member 15 is provided.
As shown in FIG. 3, the elastic members 12 can be compressed by returning a and 15b.

The opening lever 24 described above performs a lever action when the solenoid magnet 18 is deenergized and the armature moves downward, so that the elastic material pressing member 15a can be reliably released with a small force. In this way, the elastic material pressing member 15a can be released, and proper braking force can be obtained during the elevator car holding braking and the emergency braking.

<Fourth Embodiment> FIG. 5 shows a fourth embodiment of the present invention. As shown in FIG. 5, the movable elastic material pressing member 15 a and the fixed elastic material pressing member 15
Each of b is a flat plate shape, and the movable side elastic material pressing member 15a is configured to move in parallel to the fixed side elastic material pressing member 15b, and is linked to the lower ends of the elastic material pressing members 15a and 15b, respectively. One end of each of 25a and 25b is rotatably supported, the other end of the link 25a is rotatably supported, and has a stopper pin 27a. The elastic member 12 is rotatably supported at a central portion in the axial direction. The link 25b is rotatably supported by the rotary plate 27, and the other end of the link 25b is movably supported by a long groove 27b formed in the rotary plate 27. The stopper pin 27a of the rotary plate 27 is configured to be engageable with and disengageable from the link mechanism stopper 26, one end of which is rotatably supported by the pivot portion 46, and the stopper 26 is of the solenoid magnet 18 fixed to a fixed portion. Supported by armatures.

In the elevator braking apparatus constructed as shown in FIG. 5, the solenoid magnet 18 is stopped from being energized in an emergency and the armature in the solenoid magnet 18 is moved downward so that the stopper 26 is rotated and the stopper 26 is rotated. Two
The engagement between 6 and the stopper pin 27a is released. in this case,
The elastic member pressing member 15a is brought closer to the member 10 to be braked by the restoring force of the elastic member 12 for emergency braking, and the fixing member 9 of the arm 8 is brought into pressure contact with the member 10 to be braked to act as an emergency braking device. To do.

By thus opening the link 25a, the elastic member pressing member 15a can be opened,
Appropriate braking force can be obtained during braking for holding the elevator car and during emergency braking. Further, at the time of returning, since the elastic member pressing member 15a can be returned using the link mechanism 25 by applying a rotational force to the rotating plate 27, it is not necessary to provide a returning device specially, and the configuration can be simplified.

<Fifth Embodiment> FIG. 6 shows a fifth embodiment of the present invention. As shown in FIG. 6, the movable elastic material pressing member 15 a and the fixed elastic material pressing member 15
All of b are plate-shaped, and the movable elastic material pressing member 15a is configured to be movable in parallel to the fixed elastic material pressing member 15b. Then, the movable side elastic member pressing member 15a
Has an engaging groove 20a and is connected to the tip of a rope 19 which can be wound by a winch 20 fixed to a fixed portion. In the engaging groove 20a, a winch stopper 28, which is rotatably supported at one end by a pivot 47 and is supported by an armature of a solenoid magnet 18 fixed to a fixed portion, is configured to be disengageable. There is.

In the elevator brake device constructed as described above, when the energization of the solenoid magnet 18 is stopped in an emergency, the armature of the solenoid magnet 18 moves downward, so that the winch stopper 28 is used.
Swings around the pivot 47 as a fulcrum, so the winch 20
The elastic member pressing member 15a is disengaged from the engaging groove 20a of
The elastic member 12 for emergency braking is brought closer to the member 10 to be braked by the restoring force, and the fixing member 9 of the arm 8 is brought into pressure contact with the member 10 to be braked to function as an emergency braking device.

Further, when the power is restored, the movable side elastic member pressing member 15a can be restored by winding the winch 20 automatically or manually around the rope 19, so that it is not necessary to provide a special returning device. Can be simplified.

<Sixth Embodiment> FIG. 7 shows a sixth embodiment of the present invention. As shown in FIG. 7, the movable elastic material pressing member 15 a and the fixed elastic material pressing member 15
Each of b is formed in an L-shaped cross-section, a linear rack 29a is fixed to the bottom surface of the movable elastic member pressing member 15a, and the pinion 29b is rotatably engaged with the rack 29a. Has been. Furthermore, one end is the pivotal support 4.
8 is rotatably supported and has a pinion 2 at the other end.
A gear mechanism stopper 30 having a disengageable claw is provided on the tooth 9b, and the stopper 30 is supported by an armature of a solenoid magnet 18 fixed to a fixing portion.

In the elevator brake device constructed as described above, since the armature moves downward by stopping the power supply to the solenoid magnet 18 in an emergency, the gear mechanism stopper 30 rotates and the pinion 29 moves.
The pinion 29b becomes free from the teeth of b, and the restoring force of the elastic member 12 moves the movable elastic member pressing member 15a to the arm 8 side.
Can be opened.

Since the elastic member pressing member 15a can be opened in this manner, proper braking force can be obtained during both the elevator car holding braking and the emergency braking. When the power source is restored, the movable side elastic member pressing member 15a can be moved to the original position by automatically or manually applying a rotational force to the pinion 29b. After that, the armature of the solenoid magnet 18 is moved. It is only necessary to engage the return stopper 30 with the pinion 29b in the original state, which eliminates the need for providing a special returning device and simplifies the configuration.

<Seventh Embodiment> FIG. 8 shows a seventh embodiment of the present invention. As shown in FIG. 8, the movable elastic material pressing member 15 a and the fixed elastic material pressing member 15
Each of b has a crank-shaped cross section different from each other and is made of a magnetic material.
An electromagnet 31 is fixed to 5b so that the movable elastic member pressing member 15a can be attracted and moved.

The movable side elastic member pressing member 15a may not be entirely made of a magnetic material, but only the portion to which the electromagnet 31 is attracted may be made of a magnetic material. In the elevator brake device configured as described above, in the event of an emergency, the electromagnet 31
By stopping the power supply to the movable side elastic member pressing member 1
The suction of 5a is released, and the movable elastic member pressing member 15a can be surely opened by the restoring force of the emergency braking elastic member 12. As a result, the movable elastic member pressing member 15a is moved to the arm 8 side by the restoring force of the elastic member 12, so that proper braking force can be obtained during the elevator car holding braking and the emergency braking.

Further, since the electromagnet 31 is excited when the power is restored, the movable side elastic member pressing member 15a is attracted to the electromagnet 31, so that no special returning device is required. <Eighth Embodiment> FIG. 9 shows an eighth embodiment of the present invention. As shown in FIGS. 9A and 9B, the movable elastic material pressing member 15a has a flat plate shape, and the fixed elastic material pressing member 15b has a flat plate bent into an L shape. Shaft insertion holes 15a2, 15b2 are formed so that the support shaft 51 is inserted, and the shaft insertion holes 15a2, 1
The elastic material support shaft 51 is inserted through 5b2, and the emergency braking elastic material 12 is inserted through the elastic material support shaft 51 between the elastic material pressing members 15a and 15b.

The links 32a, 32b, 32c, 32d, 32e are provided between the elastic material pressing members 15a, 15b.
And pivot members 32f, 32g, 32h, 32i, 32
The pressing member interval adjusting mechanism 32 including j and 32k is provided as follows. That is, the elastic material pressing member 1
On both side surfaces of 5a, one ends of links 32a and 32b are rotatably supported by pivot members 32h and 32i, and the other ends of the links 32a and 32b are linked via pivot members 32f and 32g, respectively. 32e is rotatably supported, and one ends of the links 32c and 32d are rotatably supported by pivotal support members 32f and 32g provided at both ends of the link 32e, and the other ends of the links 32c and 32d. The parts are rotatably supported on both side surfaces of the elastic member pressing member 15b via pivot members 32j and 32k, respectively.
The solenoid magnet 18 is placed at the center of the link 32e.
Of the solenoid magnet 18 is fixed to the bottom side of the elastic material pressing member 15b.

In the elevator brake device constructed as described above, the armature of the solenoid magnet 18 is moved upward by stopping the power supply to the solenoid magnet 18 in an emergency, so that the elastic material pressing member 15a is used for emergency braking. The elastic member 12 is moved so as to approach the arm 8 by the restoring force, and thereby the fixing member 9 fixed inside the arm 8 is brought into pressure contact with the braked member 10. Thereby, the braking force required for emergency braking can be generated.

When the power is restored, the solenoid magnet 18 is excited and the armature is moved downward, so that the connecting portions of the links 32a to 32d and 32e are bent as shown in FIG. Since the material pressing member 15a returns, there is no need to provide a special returning device,
The configuration can be simplified.

Further, the pressing member spacing adjusting mechanism 32 includes links 32a to 32d and 32e and pivot members 32f to 32k.
Since the emergency braking elastic member 12 is always in contact with the elastic member pressing members 15a and 15b at a right angle, a stable operation can be obtained.

FIG. 9C shows a modification of the above-described example showing the eighth embodiment of the present invention.
Instead of a to 32d, 32e, plate-shaped members 32m, 32
n, 32o, 32p, and these are pivot members 32q,
32r rotatably supports the plate members 32m to 32p and the elastic member pressing members 15a and 15b. This action and effect are as shown in FIG.
It is almost the same as (b).

<Ninth Embodiment> FIG. 10 shows a ninth embodiment of the present invention. As shown in FIG.
The movable-side elastic material pressing member 15a has a cross-sectional shape that is a combination of a crank shape and an L-shape, and the fixed-side elastic material pressing member 15b has a cross-sectional shape that is a crank shape.
8 is fixed to one end of the elastic material pressing member 15b, and the armature side of the solenoid magnet 18 is elastic material pressing member 15b.
It is connected to one end of a.

In the elevator brake device constructed as described above, by stopping the energization of the solenoid magnet 18 in an emergency, the armature of the solenoid magnet 18 enters inside, so that the restoring force of the elastic material 12 for emergency braking is restored. Thus, the elastic material pressing member 15a is released. As a result, the fixing member 9 fixed to the inside of the arm 8 is pressed against the braked member 10. Thereby, the braking force required for emergency braking can be generated.

Further, since the solenoid magnet 18 is energized when the power is restored, the armature of the solenoid magnet 18 is projected to the outside as shown in FIG. 10, so that it is not necessary to provide a special returning device. Can be simplified.

<Tenth Embodiment> FIG. 11 shows a tenth embodiment of the present invention. As shown in FIG. 11, the fixed-side elastic material pressing member 15b has a crank-shaped cross section, and the movable-side elastic material pressing member 15a has a combined cross-sectional shape of a crank shape and an L-shape. A fluid-operated jack 33 is fixed to one end of the member 15b, and a movable-side tip portion of the jack 33 is connected to one end of the movable-side elastic member pressing member 15a. A pump 35 is connected to the jack 33 via a control valve 34 for controlling the fluid.

In the elevator brake device constructed as described above, the pump 35 is stopped by stopping the power supply to the control valve 34 in an emergency, so that the fluid in the jack 33 is discharged to the outside. The elastic material pressing member 15 by the restoring force of the elastic material 12 for braking
a is released. As a result, the fixing member 9 fixed inside the arm 8 is pressed against the braked member 10. Thereby, the braking force required for emergency braking can be generated.

When the power is restored, the pump 35 operates and the control valve 34 is energized.
Since the fluid is supplied into the jack 33, it is not necessary to provide a special returning device, and the structure can be simplified.

<Eleventh Embodiment> FIG. 12 shows an eleventh embodiment of the present invention. As shown in FIG. 12, the fixed elastic material pressing member 15b has an L-shaped cross section, the movable elastic material pressing member 15a has a flat cross section, and the return lever 36 is provided at one end of the elastic material pressing member 15b. One end of the return lever 36 is rotatably supported by the pivotal support 49, and the movable elastic member pressing member 1 is located closer to the return lever 36 than the pivotal support 49 side.
A protrusion 36a is formed which serves as a point of action when moving 5a.

When returning from the emergency braking state to the normal state as shown in the figure, the following may be done. That is, by rotating the return lever 36 in the direction of the arrow, the movable elastic member pressing member 15a is moved to the left side in the drawing.
In this case, since the elastic member 12 for emergency braking is compressed, the brake device can be returned to the normal state only by fixing the return lever 36 to the fixed portion by the fixing pin 17. At that time, since the return lever 36 does not touch the brake arm 8, the return work can be performed with the brake closed.

When the power is restored, the return lever 36
Since the fluid is supplied into the jack 33 by rotating the arrow mark in the direction of the arrow, it is not necessary to provide a special returning device, and the configuration can be simplified.

<Twelfth Embodiment> FIG. 13 shows a twelfth embodiment of the present invention. As shown in FIG. 13, the movable elastic material pressing member 15a has a crank-shaped cross section, the fixed elastic material pressing member has a flat cross-sectional shape, the movable elastic material pressing member 15a and the fixed elastic material pressing member. A screw insertion hole (not shown) is formed at one end of the member 15b so that the screw 37a can be loosely inserted, and the nut 37b can be screwed to the tip side of the screw 37a with the screw 37a loosely inserted. Is configured.

In the elevator brake device constructed as described above, when returning from the emergency braking state to the normal state as shown in the figure, the following may be done. That is,
At the time of returning, the nut 37b is screwed onto the tip of the screw 37a while the screw 37a is inserted into the screw insertion holes of the elastic member press members 15a and 15b, and the nut 37b is tightened to press the elastic member press member 15 to perform emergency braking. The brake device can be returned to the normal state by compressing the elastic material 12 for use until a braking force is not generated and fixing the nut 37b with the fixing pin 17 (not shown) so that the nut 37b does not come off from the screw 37a. At that time, since the screw mechanism including the screw 37a and the nut 37b has a simple structure and does not touch the brake arm 8, the returning work can be performed with the brake closed.

<Thirteenth Embodiment> FIG. 14 shows a thirteenth embodiment of the present invention. As shown in FIG. 14, the elevator car holding brake device having a configuration similar to that of FIGS. 1 and 2 has the same configuration as that of FIGS. 1 and 2, and has an elevator car holding elastic member 11 and an arm support shaft 41. , Washers 42,4
It is composed of 3,44. The difference from FIG. 1 and FIG. 2 is that the elastic material 12 for emergency braking and the elastic material pressing members 15a, 15 made of, for example, coil springs for emergency braking described below.
b, a holder such as a holder 16, a fixing pin 17, a solenoid magnet 18, an arm support shaft 41, washers 42, 43, 4
4 is a structure of an emergency braking device including an emergency arm support shaft 51.

That is, both ends of the emergency arm support shaft 51 are inserted below the arm support shaft 41 of the arm 8, and the emergency braking elastic member 12 and the elastic member 12 are elastically attached to the arm support shaft 41 between the arms 8 and 8. The pressing plate members 15a and 15b are inserted. The elastic pressing plate members 15a and 15b each have a crank shape in cross section, and sandwich the emergency braking elastic member 12 so that a desired compression force (a compression force smaller than that of the lifting car holding elastic member 11) can be obtained. And a connecting portion 15a for holding the elastic force of the elastic member 12.
1, 15b1. The holding metal fitting 16 is the holding unit 1.
5a1 and 15b1 are inserted to penetrate respectively,
The elastic material pressing members 15a and 15b are provided to maintain the distance between them. A pin insertion hole 16a is formed in the holding metal fitting 16, and a fixed pin 17 whose one end is connected to the armature of the solenoid magnet 18 is inserted or pulled out from the pin insertion hole 16a. The solenoid magnet 18 has a coil and an armature, and the coil is normally energized, whereby the armature projects to the outside, the coil is deactivated in an emergency, and the armature is housed inside.

When the coil is de-energized, the restoring force of the elastic member 12 for emergency braking acts so as to widen the space between the arms 8. At this time, for holding the elevator car that is acting on the arm 8 on the right side in FIG. The difference between the restoring force of the elastic member 11 and the fixing member 9
The frictional force between the braked member 10 and the braked member 10 functions as an emergency braking device. As a result, the braking force at the time of emergency braking can be made lower than that at the normal time. The embodiment in this case is
It is suitable for applications where the braking force during emergency braking may be small compared to the elevator car holding force.

<Modification> The present invention is not limited to the above-described embodiments, and the number and position of elastic members, the elastic member pressing device, the mechanism of the restoring device, and the like may be changed as necessary. Can be increased, decreased, or changed.

[0059]

According to the present invention, it is possible to provide an elevator brake device capable of obtaining necessary and appropriate braking forces when the elevator car is held and during emergency braking.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an elevator brake device of the present invention.

FIG. 2 is a detailed configuration diagram of the restoration device in FIG.

FIG. 3 is a schematic configuration diagram showing a second embodiment of an elevator brake device of the present invention.

FIG. 4 is a schematic configuration diagram showing a third embodiment of an elevator brake device of the present invention.

FIG. 5 is a schematic configuration diagram showing a fourth embodiment of an elevator brake device of the present invention.

FIG. 6 is a schematic configuration diagram showing a fifth embodiment of an elevator brake device of the present invention.

FIG. 7 is a schematic configuration diagram showing a sixth embodiment of an elevator brake device of the present invention.

FIG. 8 is a schematic configuration diagram showing a seventh embodiment of an elevator brake device of the present invention.

FIG. 9 is a schematic configuration diagram showing an eighth embodiment of an elevator brake device of the present invention.

FIG. 10 is a schematic configuration diagram showing a ninth embodiment of an elevator brake device of the present invention.

FIG. 11 is a tenth embodiment of the elevator braking apparatus of the present invention.
2 is a schematic configuration diagram showing an embodiment of FIG.

FIG. 12 is an eleventh embodiment of the elevator braking apparatus of the present invention.
2 is a schematic configuration diagram showing an embodiment of FIG.

FIG. 13 is a twelfth example of the elevator braking device according to the present invention.
2 is a schematic configuration diagram showing an embodiment of FIG.

FIG. 14 is a thirteenth elevator brake device according to the present invention.
2 is a schematic configuration diagram showing an embodiment of FIG.

FIG. 15 is a schematic perspective view showing an entire elevator having a conventional elevator brake device.

16 is a schematic configuration diagram showing only the elevator brake device of FIG. 15. FIG.

[Explanation of symbols]

1 ... Sheave, 2 ... Rope, 3 ... Lifting basket, 4 ... Counterweight,
5 ... Electric motor, 6 ... Brake device, 7 ... Elastic material, 8 ... Arm, 9 ... Fixing member (brake shoe), 10 ... Braking member, 11 ... Elevating car holding elastic material, 12 ... Emergency braking elastic material, 13 ... Elastic material pressing device, 14 ... Returning device, 15
a, 15b ... Elastic material pressing member, 16 ... Holding metal fitting, 17 ...
Fixed pin, 18 ... Solenoid magnet, 19 ... Rope, 20
... winches, 21 ... press fittings, 22 ... rollers, 23 ... press fittings, 24 ... levers, 25a, 25b ... links, 26 ...
Stopper, 27 ... Rotating plate, 28 ... Stopper, 29 ...
Gear mechanism, 29a ... Rack, 29b ... Pinion, 30 ...
Stopper, 31 ... Electromagnet, 32 ... Holding member spacing adjusting mechanism, 32a, 32b, 32c, 32d, 32e ... Link, 32f, 32g, 32h, 32i, 32j, 32k
... Pivot member, 32m, 32n, 32o, 32p ... Plate-shaped member, 32q, 32r ... Pivot member, 33 ... Jack, 34
... control valve, 35 ... pump, 36 ... return lever, 37 ... screw mechanism, 37a ... screw, 37b ... nut.

Claims (14)

[Claims] 1. A drive for raising and lowering the elevator car, wherein a sheave provided in the upper part of a hoistway in a building is rotatably supported to connect an elevator car and a counterweight to each other via ropes in a slipping manner. In an elevator equipped with a device, a member to be braked provided at a connecting portion between the sheave and the drive device, disposed on an outer peripheral side of the member to be accessible to the member to be braked, and opposed to the member to be braked. A pair of arms having brake shoes fixed at the respective positions, and one of the arms causes the elastic restoring force of the arms to bring the arms closer to the braked member and generate a frictional force between the brake shoe and the braked member. A car holding brake device that is made of an elastic material and that is used to stop the elevator car at a specified floor, and is arranged between one of the arms and a fixed part, and the elastic restoring force of the car retains the arm. Is made of an elastic material that is close to the braked member and that provides a frictional force between the brake shoe and the braked member, and operates only when the power supply of the drive device is interrupted, and the elevator car. An emergency brake device for stopping the emergency brake device, and a return device for returning the emergency brake device to an inoperative state when the power supply is restored after the emergency brake device is operated, and an elevator brake device having: . 2. The emergency braking device according to claim 1,
An elastic member, a fixed-side and movable-side elastic member pressing member, a holder, a fixing pin, a solenoid magnet, and a winch. The movable-side and fixed-side elastic member pressing members sandwich the elastic member, and A holding pin for inserting the holding tool for holding both elastic material pressing members close to each other, and the holding tool is a fixing pin for preventing the holding member from coming off from the holding section of the elastic material pressing member. The solenoid magnet has a pin insertion hole through which the fixed pin is connected to the armature, is normally energized and the armature is in a state of protruding to the outside, and is erased when the power source of the drive device is interrupted. The armature is urged to suck inward, whereby the fixed pin comes out of the pin insertion hole of the holder, and the movable-side elastic material pressing member moves to the elastic member. The force exerts a pressing force on the arm to the braked member side by the original force, and the winch is for returning the holder to the original state by winding a rope included in the winch when the power is restored. Elevator brake equipment. 3. The emergency braking device according to claim 1,
An elastic member, a fixed-side and movable-side elastic member pressing member, a pressing member, a friction reducing mechanism, a solenoid magnet, and a winch. The movable-side and fixed-side elastic member pressing members sandwich the elastic member. A holding portion for inserting the holding member for holding the elastic member holding members in a state of being close to each other, the holding member having a substantially U-shaped cross section, and the elastic member holding member inside the holding member. The holding portion of the member can be inserted, the friction reducing mechanism is arranged between the holding member and the holding portion, and reduces a frictional force generated between the holding member and the holding member. When the presser is connected and normally energized to project the armature to the outside, the armature is deenergized and sucks inward when the power source of the drive device is interrupted, which causes the wear to occur. The pressing member having a friction reducing mechanism is pulled out from the holding portion, and the movable elastic material pressing member applies a pressing force to the braked member by the arm by the restoring force of the elastic material. The winch is an elevator brake device in which when the power is restored, the rope is wound around the winch to restore the holder to the original state. 4. The emergency braking device according to claim 1,
An elastic member, a fixed-side and movable-side elastic member pressing member, a pressing member, a lever, a solenoid magnet, and a winch. The movable-side and fixed-side elastic member pressing members sandwich the elastic member, and The elastic member pressing member has a holding portion for inserting the pressing member for holding the elastic member pressing members close to each other, one end of the lever is rotatably supported by a pivotal supporting portion, and the elastic portion is provided at a central portion. A material pressing member is provided with a pressing tool capable of inserting the holding part of the pressing tool, and the solenoid magnet is connected to the end of the armature opposite to the pivotal supporting part of the lever, and is normally biased. When the power source of the drive device is cut off, the armature sucks inward, which causes the lever to rotate and the presser foot to be removed from the holding part. In addition, the movable-side elastic material pressing member applies a pressing force to the arm to the braked member side by the restoring force of the elastic material, and the winch is a rope included in the power source when the power is restored. An elevator brake device in which the movable side elastic material pressing member is returned to the original state by winding a wire to insert the holding portion into the pressing tool. 5. The emergency braking device according to claim 1,
The elastic member, the fixed-side and movable-side elastic member pressing members, the rotating member, the first and second links, the stopper, and the solenoid magnet, and the movable-side and fixed-side elastic member pressing members are the elastic members. The movable side elastic material pressing member moves in parallel with the fixed side elastic material pressing member while sandwiching the material, and the rotating member is rotatably supported at the central portion in the axial direction of the elastic material. The outer peripheral portion has a stopper pin and a long groove, and one ends of the first and second links are pivotally supported by the end portions of the movable side and fixed side elastic member pressing members, respectively, and The other end of the first link is pivotally supported on a part of the plate surface of the rotary member, and the other end of the second link is pivotally supported on the rotary member so as to be movable along a long groove of the rotary member. One end of the stopper is The solenoid magnet is rotatably pivotally supported and has an engaging claw at the other end that engages with the stopper pin. The solenoid magnet is connected to the armature near the end of the stopper opposite to the pivotal support. , When the amateur is normally energized and is in a state of protruding to the outside, the engaging claw of the stopper engages with the stopper pin, and when the power source of the drive device is cut off, the amateur is sucked inward, As a result, the rotary member rotates in a direction in which the pivotal support portions of both links move away from each other, and the movable elastic material pressing member applies a pressing force to the arm toward the braked member by the restoring force of the elastic material. Elevator braking device. 6. The emergency braking device according to claim 1,
An elastic member, a fixed-side and movable-side elastic member pressing member, a winch, a winch stopper, and a solenoid magnet, and the movable-side and fixed-side elastic member pressing members sandwich the elastic member and move the movable side. The elastic material pressing member moves in parallel to the fixed elastic material pressing member, and the winch has a linear member such as a rope in which the tip end of the linear member is connected to the movable elastic material pressing member. By winding the member, the movable side elastic material pressing member can be brought closer to the fixed side elastic material pressing member, and the outer peripheral surface of the drum for winding the linear member has an engaging groove. The winch stopper is rotatably supported at one end and engages with the engaging groove at the other end, and the solenoid magnet is attached to the armature for the winch stopper. Near the end on the opposite side to the pivotal part of Par is connected,
When the armature is normally urged to project to the outside, the stopper engages with the engagement groove, and when the power source of the drive device is cut off, the armature is deenergized and the amateur sucks inwardly. The stopper is rotated to release the engagement with the engaging groove, and the movable elastic material pressing member applies a pressing force to the arm toward the braked member by the restoring force of the elastic material. Elevator brake equipment. 7. The emergency braking device according to claim 1,
An elastic member, a fixed-side and movable-side elastic member pressing member, a gear mechanism, a stopper, and a solenoid magnet. The movable-side and fixed-side elastic member pressing members have an L-shaped cross section, and While sandwiched, the movable side elastic material pressing member moves in parallel to the fixed side elastic material pressing member, and the gear mechanism is a linear shape fixed to one end side of the movable side elastic material pressing member. A rack and a pinion that is rotatable at one end of the fixed elastic member pressing member and is meshable with the rack. The movable elastic member pressing member can be moved by rotating the pinion. One end of the stopper is rotatably supported, and the other end thereof has a claw capable of engaging with the teeth of the pinion.The solenoid magnet is provided on the armature. When the end of the topper on the side opposite to the pivotal support is connected and normally biased, the amateur is in a state of protruding to the outside, the stopper engages with the pinion, and when the power source of the drive device is cut off, When the armature is deenergized and sucks inwardly, the stopper is rotated to release the engagement with the pinion, and the movable elastic material pressing member moves the arm by the restoring force of the elastic material. An elevator brake device that applies a pressing force to the braked member side. 8. The emergency braking device according to claim 1,
An elastic material, a fixed-side and movable-side elastic material pressing member, and an electromagnet. The movable-side and fixed-side elastic material pressing members sandwich the elastic material, and the movable-side elastic material pressing member includes the fixed-side elastic material. The movable-side elastic material pressing member is configured to be movable in parallel to the material-pressing member, and at least a part of the movable-side elastic material-pressing member can be attracted by the electromagnet, and the electromagnet is the fixed-side elastic-material pressing member. The side elastic material pressing member is fixed at a position facing the attractable portion, is normally urged to suck and adsorb the movable elastic material pressing member, and is deenergized when the power source of the drive device is interrupted, An elevator brake device, wherein the movable side elastic material pressing member applies a pressing force to the arm to the braked member side by a restoring force of the elastic material. 9. The emergency braking device according to claim 1,
An elastic member, a fixed-side and movable-side elastic member pressing member, an elastic member support shaft, a pressing member interval adjusting mechanism, and a solenoid magnet, and the movable-side elastic member pressing member is a flat plate shape, and the fixed side. The elastic material pressing member has a shape in which flat plates are bent and stacked in an L shape. The elastic material pressing member is sandwiched by both, and the movable side elastic material pressing member moves in parallel with the fixed side elastic material pressing member. An elastic material support shaft is provided between the elastic material pressing members and so as to pass through the elastic material. The pressing member interval adjusting mechanism is composed of first to fifth links. So as to form a parallelogram, one end of each link is rotatably supported by an end of the elastic member pressing member, and the other ends of the links are mutually connected via a fifth link. It is rotatably connected. The noid magnet is fixed to the fixed-side elastic material pressing member, and the armature is connected to the fifth link and is normally energized so that the armature is attracted to the inside thereof. When there is a power failure, the armature is deenergized and the armature projects to the outside, whereby the movable elastic material pressing member applies a pressing force to the arm to the braked member by the restoring force of the elastic material. . 10. The emergency brake device according to claim 1, wherein an elastic material, a fixed-side and movable-side elastic material pressing member,
The movable-side elastic material pressing member has a cross-sectional shape that is a combination of a crank shape and an L-shape, and the fixed-side elastic material pressing member is a crank shape. The elastic material is sandwiched between the two. The movable side elastic member pressing member moves in parallel with the fixed side elastic material pressing member, the solenoid magnet is fixed to the fixed side elastic material pressing member, and the armature is fixed to the movable side elastic member. The movable side elastic material pressing member is connected to the pressing member and is normally urged to suck and adsorb the movable side elastic material pressing member, and is deenergized when the power source of the drive device is cut off, and the movable side elastic material pressing member restores the elastic material. An elevator brake device for applying a pressing force to the braked member side by the arm. 11. The emergency brake device according to claim 1, wherein an elastic material, a fixed side and a movable side elastic material pressing member,
A jack, a control valve, and a pump, wherein the movable-side elastic material pressing member has a combined sectional shape of a crank shape and an L shape, and the fixed-side elastic material pressing member has a crank shape. While sandwiching the elastic material, the movable elastic material pressing member is to move in parallel to the fixed elastic material pressing member, the jack is fixed to the fixed elastic material pressing member,
This movable part is connected to the movable side elastic member pressing member, and the movable part is driven by controlling the amount of fluid supplied to the inside by the control valve and the pump. When fluid is supplied to the movable-side elastic material pressing member and the movable-side elastic material pressing member is sucked, the fluid inside the jack is discharged to the outside when the power source of the drive device is cut off. An elevator brake device for applying a pressing force to the brake member by the restoring force of the material. 12. The emergency braking device according to claim 1, wherein an elastic material, a fixed side and a movable side elastic material pressing member,
The elastic member holding member on the movable side has a flat plate shape, and the elastic member holding member on the fixed side has an L-shaped cross section. The elastic material pressing member moves in parallel with the fixed elastic material pressing member, and the return lever is rotatably pivoted at one end of the fixed elastic material pressing member, and has an action point. Touches the movable side elastic member pressing member, a fixing pin is inserted and fixed near the tip, and the fixing pin is configured to be insertable into a fixed portion. A rotation operation is performed so as to apply a pressing force to the elastic material, the fixing pin is inserted into a fixed portion to maintain this state, and when the power source of the drive device is interrupted, the fixing pin is removed from the fixed portion. Pull out Elevator braking device is intended to provide a pressing force to said arm to said braked member side is more movable side elastic member material pressing member by the restoring force of the elastic member. 13. The emergency braking device according to claim 1, wherein an elastic material, a fixed side and movable side elastic material pressing member,
And a movable elastic material pressing member having a flat plate shape, a fixed elastic material pressing member having a crank shape in cross section, and sandwiching the elastic material between the two, and the movable elastic material pressing member. Is to move in parallel to the fixed-side elastic material pressing member, and both elastic material pressing members are provided with screw insertion holes, respectively, and the screw mechanism is composed of a screw and a nut. A brake device for an elevator, wherein when the movable side elastic member pressing member is held in a normal state, the screw is inserted into a screw insertion hole of both elastic material pressing members and the nut is screwed into an end portion. 14. A drive for raising and lowering the elevator car, wherein a sheave provided in the upper part of a hoistway in a building is rotatably supported to connect an elevator car and a counterweight in a slipping manner via ropes. In an elevator equipped with a device, a member to be braked provided at a connecting portion between the sheave and the drive device, disposed on an outer peripheral side of the member to be accessible to the member to be braked, and opposed to the member to be braked. A pair of arms having brake shoes fixed at the respective positions, and one of the arms causes the elastic restoring force of the arms to bring the arms closer to the braked member and generate a frictional force between the brake shoe and the braked member. A car holding brake device, which is provided with the first elastic material, for stopping the elevator car at a designated floor, a second elastic material, a fixed-side and movable-side elastic material pressing member, and a holder. The movable side and the fixed side elastic member pressing members, which are composed of a fixed pin and a solenoid magnet, are arranged between the arms, and the elastic member is sandwiched in a state of being passed through an arm support shaft, and both elastic members are sandwiched. There is a holding portion for inserting the holding tool for holding the pressing members close to each other, and the holding tool has a fixing pin for preventing the holding member from coming off from the holding part of the elastic material pressing member. The solenoid magnet has a pin insertion hole, the fixing pin is connected to the amateur, and the armature is normally energized to project the armature to the outside, and is deenergized when the power supply of the drive device is interrupted. Sucks inward, whereby the fixed pin is pulled out from the pin insertion hole of the holder, and the movable side elastic material pressing member is restored by the elastic material. Elevator brake device having a emergency brake device to weaken the pressing force acting more said arm to said braked member.