2. The emergency stop device according to claim 1, wherein the boosting mechanism has a first link piece that is rotatably supported to the one end portions of the pair of arm members through the rotating pin, and a second link piece to which the braking shoe is attached and which is rotatably connected to the first link piece.

3. The emergency stop device according to claim 1, wherein a boosting urging member having elasticity is disposed between the rotating pin and the braking shoe.

4. The emergency stop device according to any one of claims 1 to 3, wherein a restricting plate is provided at the one end portions of the pair of arm members, the restricting plate restricting an upward rotation operation of the boosting mechanism in the ascending and descending direction.

5. The emergency stop device according to claim 1, wherein a plurality of the braking mechanisms are provided in the elevating body, and an interlocking mechanism that interlocks the plurality of braking mechanisms is provided.

6. The emergency stop device according to claim 1, wherein the lock mechanism is provided at the other end portion of the pair of arm members opposing the one end portions of the pair of arm members, the one end portions holding the rotating shaft.

7. An elevator including an elevating body that moves upward and downward in a hoistway, the elevator comprising: a guide rail that stands in the hoistway and slidably supports the elevating body; and an emergency stop device that stops the movement of the elevating body based on a state of the upward and downward movement of the elevating body, wherein the emergency stop device includes: a braking mechanism that is provided in the elevating body and stops the movement of the elevating body by holding the guide rail; and an operating mechanism that operates a braking member of the braking mechanism, the operating mechanism includes: a rotating shaft that stands along a direction in which the guide rail extends; a pair of arm members that is rotatably supported to the rotating shaft; a boosting mechanism that is provided at one end portions of the pair of arm members facing the guide rail and has a braking shoe coming into contact with the guide rail; an operating side urging member that urges the one end portions of the pair of arm members in a direction in which the one end portions approach the guide rail; an actuator that rotates the pair of arm members in a direction in which the one end portions of the pair of arm members become distant from the guide rail against an urging force of the operating side urging member; and a lock mechanism that can restrict a rotation operation of the pair of arm members, and the boosting mechanism is supported to the one end portions of the pair of arm members through a rotating pin so as to be rotatable in an ascending and descending direction of the elevating body, and is formed so that an interval from the rotating pin to the braking shoe is variable.

[0001]The present invention relates to an emergency stop device for stopping a car in an emergency, and an elevator including the same.
2.Description of the Related Art
[0002]In general, a rope type elevator has a main rope and a compensation rope that connect a car and a balance weight to each other, or a long object such as a governor rope used for detecting a speed of the car or the balance weight. In addition, in the elevator, it has been prescribed that an emergency stop device that automatically stops an operation of the car when a speed of the car ascending and descending along a guide rail exceeds a prescribed value is provided as a safety device. [0003]
In recent years, an emergency stop device of which an emergency stop mechanism is electrically operated without using a governor has been proposed. An example of such a type of emergency stop device according to the

related art includes a technique described in JP 2013-18645 A. In the technique described in JP 2013-18645 A, the emergency stop device having a first body portion fixed to the car and a second body portion vertically displaceable on a longitudinal shaft supported to the first body portion is disclosed. [0004]
In addition, the second body portion of the emergency stop device disclosed in JP 2013-18645 A is provided with a first braking member that grips the guide rail and has a wedge shape and a pair of arm portions supported so as to be rotatable around a longitudinal shaft as a fulcrum. Further, the second body portion is provided with a second braking member that grips the guide rail at one end side of the pair of arm portions and has a cam shape and an actuator that is attached to the other end side of the pair of arm portions and separates the a second braking member from the guide rail. In addition, a compression spring for urging the pair of arm portions and gripping the guide rail by the second braking member is provided on the other end side of the arm portions.
SUMMARY OF THE INVENTION [0006]

In the technique disclosed in JP 2013-18645 A, it is possible to reduce power required for returning from an operating state to a normal state by rotating the cam, but in order to grip the guide rail, an excessive urging force is required for the compression spring. In addition, at normal times, it is necessary to maintain the compression spring in a compressed state against the urging force of the compression spring by an electromagnetic attractive force of the actuator. As a result, in the technique disclosed in JP 2013-18645 A, there is a problem that a capacity of the actuator is increased. [0007]
An object of the present invention is to provide an emergency stop device and an elevator in which an increase in a capacity of an actuator can be suppressed, in consideration of the abovementioned problems. [0008]
An aspect of the present invention provides an emergency stop device that stops movement of an elevating body based on a state of upward and downward movement of the elevating body. The emergency stop device includes a braking mechanism that is provided in the elevating body and stops the movement of the elevating body by holding a guide rail on which the elevating body is slid and an

operating mechanism that operates a braking member of the braking mechanism.
The operating mechanism includes a rotating shaft, a pair of arm members, a boosting mechanism, an operating side urging member, an actuator, and a lock mechanism.
The rotating shaft stands along a direction in which the guide rail extends. The pair of arm members is rotatably supported to the rotating shaft. The boosting mechanism is provided at one end portions of the pair of arm members facing the guide rail and has a braking shoe coming into contact with the guide rail. The operating side urging member urges the one end portions of the pair of arm members in a direction in which the one end portions approach the guide rail. The actuator rotates the pair of arm members in a direction in which the one end portions of the pair of arm members become distant from the guide rail against an urging force of the operating side urging member. The lock mechanism can restrict a rotation operation of the pair of arm members. The boosting mechanism is supported to the one end portions of the pair of arm members through a rotating pin so as to be rotatable in an ascending and descending direction of the elevating body, and is formed so that an interval from the rotating pin to the braking shoe is variable. [0009]

6
Another aspect of the present invention provides an elevator including an elevating body that moves upward and downward in a hoistway. The elevator includes a guide rail that stands in the hoistway and slidably supports the elevating body, and an emergency stop device that stops movement of the elevating body based on a state of the upward and downward movement of the elevating body. In addition, as the emergency stop device, the emergency stop device described above is used. [0010]
According to the emergency stop device and the elevator having the configurations described above, it is possible to suppress an increase in a capacity of the actuator.
BRIEF DESCRIPTION OF THE DRAWINGS [0011]
Fig. 1 is a schematic configuration diagram illustrating an elevator according to a first embodiment;
Fig. 2 is a block diagram illustrating a control system of the elevator according to the first embodiment;
Fig. 3 is a perspective view illustrating an emergency stop device of the elevator according to the first embodiment;

7
Fig. 4 is a perspective view illustrating an operating mechanism of the emergency stop device of the elevator according to the first embodiment;
Figs. 5A to 5C are views illustrating the operating mechanism in the emergency stop device of the elevator according to the first embodiment, wherein Fig. 5A is a plan view, Fig. 5B is a view illustrating a lock mechanism of the operating mechanism, and Fig. 5C is a view illustrating a boosting mechanism of the operating mechanism;
Figs. 6A to 6C are views illustrating a state in which the operating mechanism in the emergency stop device of the elevator according to the first embodiment is operated, wherein Fig. 6A is a plan view, Fig. 6B is a view illustrating the lock mechanism of the operating mechanism, and Fig. 6C is a view illustrating the boosting mechanism of the operating mechanism;
Figs. 7A to 7C are views illustrating a state in which the operating mechanism in the emergency stop device of the elevator according to the first embodiment is operated to hold a guide rail, wherein Fig. 7A is a plan view, Fig. 7B is a view illustrating the lock mechanism of the operating mechanism, and Fig. 7C is a view illustrating the boosting mechanism of the operating mechanism;

8
Figs. 8A to 8C are views illustrating a state in which the operating mechanism in the emergency stop device of the elevator according to the first embodiment returns from a braking state to a normal state, wherein Fig. 8A is a plan view, Fig. 8B is a view illustrating the lock mechanism of the operating mechanism, and Fig. 8C is a view illustrating the boosting mechanism of the operating mechanism;
Figs. 9A to 9C are views illustrating a state in which the operating mechanism in the emergency stop device of the elevator according to the first embodiment returns from the braking state to the normal state, wherein Fig. 9A is a plan view, Fig. 9B is a view illustrating the lock mechanism of the operating mechanism, and Fig. 9C is a view illustrating the boosting mechanism of the operating mechanism;
Figs. 10A and 10B are views illustrating an operating mechanism in an emergency stop device of an elevator according to a second embodiment, wherein Fig. 10A is a plan view illustrating a boosting mechanism, and Fig. 10B is a front view illustrating the boosting mechanism;
Fig. 11 is a view illustrating a state in which the operating mechanism in the emergency stop device of the elevator according to the second embodiment is operated;

9
Fig. 12 is a schematic configuration diagram illustrating an emergency stop device of an elevator according to a third embodiment; and
Fig. 13 is a perspective view illustrating an operating mechanism of the emergency stop device of the elevator according to the third embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENTS [0012]
Hereinafter, emergency stop devices and elevators according to embodiments will be described with reference to Figs. 1 to 13. It should be noted that in each of the drawings, common members are denoted by the same reference numerals. [0013]
1. First Embodiment 1-1. Configuration Example of Elevator
First, a configuration of an elevator according to a first embodiment (hereinafter, referred to as “the present embodiment”) will be described with reference to Fig. 1.
Fig. 1 is a schematic configuration diagram illustrating a configuration example of an elevator according to the present embodiment. [0014]

10
As illustrated in Fig. 1, the elevator 1 according to the present embodiment ascends and descends in a hoistway 110 formed in a building structure. The elevator 1 includes a car 120 showing an example of an elevating body on which a person or luggage is carried, a main rope 130, and a balance weight 140 showing another example of the elevating body. In addition, the elevator 1 includes a hoisting machine 100 and two car side emergency stop devices 10A and 10B, and a balance weight side emergency stop device 10C. [0015]
In addition, the elevator 1 includes a control device 170, a tail cord 171, an intermediate box 172, and a deflector wheel 150. The hoistway 110 is formed in the building structure, and has a machine room 160 provided at the top thereof. [0016]
The hoisting machine 100 and the deflector wheel 150 are disposed in the machine room 160. The main rope 130 is wound around the hoisting machine 100. An upper portion of the car 120 is connected to one end of the main rope 130, and an upper portion of the balance weight 140 is connected to the other end of the main rope 130. [0017]

11
The main rope 130 is wound around a sheave (not illustrated) in the hoisting machine 100. The hoisting machine 100 is driven, such that the car 120 and the balance weight 140 ascend and descend in the hoistway 110. In addition, the deflector wheel 150 mounted with the main rope 130 is provided in the vicinity of the hoisting machine 100. [0018]
Further, the control device 170 is installed in the machine room 160. The control device 170 is connected to the intermediate box 172 through a connection wiring 173. The intermediate box 172 is installed at an intermediate position of an interval at which the car 120 ascends and descends on a wall surface of the hoistway 110. [0019]
In addition, the intermediate box 172 and the car 120 are connected to each other through the tail cord 171. One end of the tail cord 171 is connected to the intermediate box 172, and the other end of the tail cord 171 is connected to a lower portion of the car 120. In addition, the tail cord 171 transfers a control signal from the control device 170 to the car 120, and transfers a signal from the car 120 to the control device 170. [0020]

12
In addition, two guide rails 201A and 201B and a balance weight side guide rail 201C that extend along an ascending and descending direction Z of the car 120 and the balance weight 140 are provided in the hoistway 110. The car 120 is supported to the guide rails 201A and 201B so as to be slidable through a slider (not illustrated). Likewise, the balance weight 140 is supported to the balance weight side guide rail 201C so as to be slidable through a slider (not illustrated). [0021]
In addition, the two emergency stop devices 10A and 10B are provided at a lower end portion of the car 120. The two emergency stop devices 10A and 10B are disposed to face, respectively, the guide rails 201A and 201B on which the car 120 is slid. Further, the balance weight side emergency stop device 10C is provided at a lower end portion of the balance weight 140. The balance weight side emergency stop device 10C is disposed to face the balance weight side guide rail 201C on which the balance weight 140 is slid. Detailed configurations of the emergency stop devices 10A and 10B and the balance weight side emergency stop device 10C will be described below. [0022] 1-2. Control System of Elevator

13
Next, a control system of the elevator 1 having the configuration described above will be described with reference to Fig. 2.
Fig. 2 is a block diagram illustrating the control system. [0023]
As illustrated in Fig. 2, the control device 170 is provided with a first control portion 170A and a second control portion 170B. The first control portion 170A is installed in the hoistway 110, and is connected to a first state detecting sensor 121A that detects a state of the car 120. In addition, the second control portion 170B is installed in the hoistway 110, and is connected to a second state detecting sensor 121B that detects the state of the car 120 like the first state detecting sensor 121A. [0024]
An example of information detected by the first state detecting sensor 121A and the second state detecting sensor 121B includes position information of the car 120 moving upward and downward in the hoistway 110, speed information of the car 120, acceleration information of the car 120, or the like. An example of the position information of the car 120 includes abnormal approach information detected when vertically adjacent two cars 120 approach each other at an interval smaller than a

14
predetermined interval in a multi-car elevator in which a plurality of cars 120 move upward and downward in the same hoistway 110. [0025]
In addition, an example of the speed information of the car 120 includes abnormal descending speed information detected when a descending speed of the car 120 reaches 1.3 times or more the rated speed. An example of the acceleration information of the car 120 includes abnormal acceleration information detected when an acceleration of the car 120 deviates from a preset pattern. The first state detecting sensor 121A outputs the detected information to the first control portion 170A, and the second state detecting sensor 121B outputs the detected information to the second control portion 170B. [0026]
The first control portion 170A and the second control portion 170B determine whether the state of the car 120 is abnormal or normal based on the information detected by the first state detecting sensor 121A and the second state detecting sensor 121B. The first control portion 170A and the second control portion 170B output operation command signals to the first emergency stop device 10A and the second emergency stop device 10C when they determine that the state of the car 120 is abnormal. Therefore, the

15
first emergency stop device 10A and the second emergency stop device 10C are operated based on the operation command signals from the first control portion 170A and the second control portion 170B to stop the car 120. [0027]
It should be noted that an example in which the first state detecting sensor 121A and the second state detecting sensor 121B detect the position information, the speed information, and the acceleration information has been described in the present embodiment, but the present invention is not limited thereto. For example, the position information, the speed information, and the acceleration information may be detected by different sensors, respectively. Further, the first control portion 170A and the second control portion 170B may select and acquire only one of the position information, the speed information, and the acceleration information or may acquire a combination of the position information, the speed information, and the acceleration information. [0028]
Further, an example in which a double system is configured by providing two state detecting sensors 121A and 121B and two control portions 170A and 170B has been described, but the present invention is not limited thereto. For example, a triple system may be configured by providing

16
three or more state detecting sensors and three or more
control portions or a single system may be configured by
providing only one state detecting sensor and only one
control portion.
[0029]
1-3. Configuration of Emergency Stop Device
Next, detailed configurations of the emergency stop devices 10A and 10B and the balance weight side emergency stop device 10C will be described with reference to Figs. 3 to 5C. It should be noted that since the emergency stop devices 10A and 10B and the balance weight side emergency stop device 10C have the same configuration, only the emergency stop device 10A will be described below.
Fig. 3 is a perspective view illustrating the emergency stop device 10A. [0030]
As illustrated in Fig. 3, the emergency stop device 10A includes a housing 11, a braking mechanism 12, and an operating mechanism 13. The housing 11 is formed in a substantially hollow rectangular parallelepiped shape. The housing 11 is fixed to the lower end portion of the car 120 (see Fig. 1), and is disposed to face the guide rail 201A. The housing 11 has an upper frame 15, a lower frame 16, a first side frame 17A, and a second side frame 17B. [0031]

17
Each of the upper frame 15, the lower frame 16, the first side frame 17A, and the second side frame 17B is formed in a substantially flat plate shape. The upper frame 15 and the lower frame 16 face each other with an interval therebetween along the ascending and descending direction Z. The upper frame 15 is disposed above the lower frame 16 in the ascending and descending direction Z. A notch portion 15a into which the guide rail 201A is inserted is formed in one side of the upper frame 15 facing the guide rail 201A. Likewise, a lower opening 16a into which the guide rail 201A is inserted is formed in one side of the lower frame 16 facing the guide rail 201A. [0032]
The first side frame 17A and the second side frame 17B are disposed so as to connect the upper frame 15 and the lower frame 16 to each other in the ascending and descending direction Z. The first side frame 17A and the second side frame 17B face each other with an interval therebetween in a direction (hereinafter, referred to as a first direction X) which is perpendicular to the ascending and descending direction Z and in which two wide surfaces 201a and 201a on which sliders in the guide rail 201A are slid face each other. Portions of the braking mechanism 12 and the operating mechanism 13 are disposed in a space

18
surrounded by the upper frame 15, the lower frame 16, the first side frame 17A, and the second side frame 17B. [0033]
The braking mechanism 12 has a pair of wedge members 21A and 22B, which are an example of a braking member, a first guide member 22A, a second guide member 22B, a first arm portion 23A and a second arm portion 23B, and a braking side urging member (not illustrated). As the braking side urging member, an elastic member such as a leaf spring having a U-shaped cross section or a compression coil spring is used. The braking side urging member is disposed inside the first side frame 17A and the second side frame 17B. [0034]
The first arm portion 23A and the second arm portion 23B are connected to the braking side urging member. The first arm portion 23A is disposed on one side in the first direction X with respect to the guide rail 201A. The first arm portion 23A is supported to a fixed shaft (not illustrated) fixed to the first side frame 17A. In addition, the second arm portion 23B is disposed on the other side in the first direction X with respect to the guide rail 201A. The second arm portion 23B is supported to a fixed shaft 24 fixed to the second side frame 17B. [0035]

19
In addition, one surface of the first arm portion 23A facing the guide rail 201A in the first direction X is a tapered surface that continuously approaches the guide rail 201A from a lower side toward an upper side in the ascending and descending direction Z. Likewise, one surface of the second arm portion 23B facing the guide rail 201A in the first direction X is a tapered surface that continuously approaches the guide rail 201A from the lower side toward the upper side in the ascending and descending direction Z. For this reason, an interval between the first arm portion 23A and the second arm portion 23B in the first direction X becomes narrow from the lower side toward the upper side in the ascending and descending direction Z. [0036]
It should be noted that for example, the leaf spring having the U-shaped cross section may be used as the braking side urging member, and both end portions of leaf spring may be used as the first arm portion 23A and the second arm portion 23B. In addition, the braking side urging member may be interposed between the first arm portion 23A and the first side frame 17A and between the second arm portion 23B and the second side frame 17B. [0037]
The first guide member 22A is fixed to the first arm portion 23A through fixing bolts 25, and the second guide

20
member 22B is fixed to the second arm portion 23B through fixing bolts 25. Further, the pair of wedge members 21A and 22B is disposed between the first arm portion 23A and the second arm portion 23B. The first wedge member 21A is in contact with one surface of the first arm portion 23A, which is the tapered surface, and the second wedge member 21B is in contact with one surface of the second arm portion 23B, which is the tapered surface. [0038]
Each of the first guide member 22A and the second guide member 22B is formed in a substantially flat plate shape. The first guide member 22A and the second guide member 22B face each other with the guide rail 201A interposed therebetween and with a predetermined interval therebetween in the first direction X. [0039]
In addition, end portions of sides of the first guide member 22A and the second guide member 22B facing each other are formed so that an interval therebetween in the first direction X becomes narrow from the lower side toward the upper side in the ascending and descending direction Z. Guide pieces 22a are provided at the end portions of the sides of the first guide member 22A and the second guide member 22B facing each other. The guide pieces 22a protrude in a second direction Y perpendicular

21
to both of the first direction X and the ascending and descending direction Z. The guide pieces 22a extend along the ascending and descending direction Z. [0040]
An engaging groove portion 27 of the first wedge member 21A is slidably engaged with the guide piece 22a of the first guide member 22A. In addition, an engaging groove portion 27 of the second wedge member 21B is slidably engaged with the guide piece 22a of the second guide member 22B. [0041]
Fig. 4 is a perspective view illustrating the operating mechanism 13.
As illustrated in Fig. 4, the first wedge member 21A and the second wedge member 21B are supported so as to be movable in the first direction X on a body portion 36 of an operating mechanism 13 to be described below. Each of the first wedge member 21A and the second wedge member 21B is formed in a wedge shape. [0042]
One surface of the first wedge member 21A facing the wide surface 201a of the guide rail 201A is formed in parallel with the wide surface 201a. That is, one surface of the first wedge member 21A is formed in parallel with the ascending and descending direction Z. In addition, a

22
facing surface of the first wedge member 21A facing one surface of the first arm portion 23A is formed in parallel with one surface of the first arm portion 23A. For this reason, the facing surface of the first wedge member 21A is inclined with respect to the ascending and descending direction Z, and approaches the guide rail 201A from the lower side toward the upper side in the ascending and descending direction Z. [0043]
In addition, the engaging groove portion 27 is formed in a surface of the first wedge member 21A facing the first guide member 22A. The engaging groove portion 27 extends so as to be parallel with the facing surface of the first wedge member 21A and be inclined with respect to the ascending and descending direction Z. The guide piece 22a of the first guide member 22A is slidably engaged with the engaging groove portion 27. The first wedge member 21A is supported so as to be movable in the ascending and descending direction Z by the first guide member 22A. [0044]
Further, a stopper guide pin 28 is provided at a lower end portion of the first wedge member 21A in the ascending and descending direction Z. The stopper guide pin 28 protrudes downward from the lower end portion of the first wedge member 21A in the ascending and descending

23
direction Z. The stopper guide pin 28 is inserted into a guide groove 36b of a body portion 36 to be described below so as to be slidable in the first direction X. [0045]
Likewise, one surface of the second wedge member 21B facing the wide surface 201a of the guide rail 201A is formed in parallel with the wide surface 201a. That is, one surface of the second wedge member 21B is formed in parallel with the ascending and descending direction Z. In addition, a facing surface of the second wedge member 21B facing one surface of the second arm portion 23B is formed in parallel with one surface of the second arm portion 23B. For this reason, the facing surface of the second wedge member 21B is inclined with respect to the ascending and descending direction Z, and approaches the guide rail 201A from the lower side toward the upper side in the ascending and descending direction Z. [0046]
In addition, the engaging groove portion 27 is formed in a surface of the second wedge member 21B facing the second guide member 22B. The engaging groove portion 27 extends so as to be parallel with the facing surface of the second wedge member 21B and be inclined with respect to the ascending and descending direction Z. The guide piece 22a of the second guide member 22B is slidably engaged with

24
the engaging groove portion 27. The second wedge member 21B is supported so as to be movable in the ascending and descending direction Z by the second guide member 22B. [0047]
Further, a stopper guide pin 28 is provided at a lower end portion of the second wedge member 21B in the ascending and descending direction Z. The stopper guide pin 28 protrudes downward from the lower end portion of the second wedge member 21B in the ascending and descending direction Z. The stopper guide pin 28 is inserted into a guide groove 36b of a body portion 36 to be described below so as to be slidable in the first direction X. [0048]
In a normal state in which an operating mechanism 13 to be described below is not operated, that is, at the time of a normal operation of the elevator 1, the first wedge member 21A and the second wedge member 21B are disposed below the first arm portion 23A and the second arm portion 23B in the ascending and descending direction Z. In this case, gaps are secured between the first wedge member 21A and the second wedge member 21B and the wide surfaces 201a of the guide rail 201A, respectively. [0049]
In addition, in an emergency in which an operating mechanism 13 to be described below is operated, the first

25
wedge member 21A and the second wedge member 21B are supported to the first guide member 22A and the second guide member 22B, and move upward of the first arm portion 23A and the second arm portion 23B in the ascending and descending direction Z. One surfaces of the first wedge member 21A and the second wedge member 21B come into contact with the wide surfaces 201a of the guide rail 201A, respectively. Further, when the first wedge member 21A and the second wedge member 21B move upward of the first arm portion 23A and the second arm portion 23B in the ascending and descending direction Z, the first wedge member 21A and the second wedge member 21B are pressed against the guide rail 201A by an urging force of the braking side urging member. Therefore, upward and downward movement of the car 120 is braked. [0050]
Next, the operating mechanism 13 will be described.
As illustrated in Fig. 4, the operating mechanism 13 includes a first arm member 31, a second arm member 32, an actuator 33, an operating side urging member 34, a lock mechanism 35, the body portion 36, a rotating shaft 37, a boosting mechanism 38, and a connecting rod 39. [0051]
The rotating shaft 37 stands along the ascending and descending direction Z from one surface on an upper side of

26
the lower frame 16 (see Fig. 3) of the housing 11 in the ascending and descending direction Z. The first arm member 31 and the second arm member 32 are rotatably supported to the rotating shaft 37. In addition, the body portion 36 is supported to the rotating shaft 37 so as to be movable in the ascending and descending direction Z. The body portion 36 is supported to the rotating shaft 37 and is disposed in the housing 11. [0052]
The body portion 36 is formed in a hollow quadrangular prism shape, and both end portions of the body portion 36 in the second direction Y are opened. The rotating shaft 37 penetrates through the body portion 36 along the ascending and descending direction Z. In addition, two guide grooves 36b and 36b extending in the first direction X are formed in an upper surface 36a of the body portion 36 in the ascending and descending direction Z. The two guide grooves 36b and 36b are disposed with the guide rail 201A interposed therebetween and with an interval therebetween in the first direction X. [0053]
The first wedge member 21A and the second wedge member 21B are placed on the upper surface 36a of the body portion 36. The stopper guide pin 28 of the first wedge member 21A penetrates through the guide groove 36b formed

27
in one side of the first direction X. In addition, the stopper guide pin 28 of the second wedge member 21B penetrates through the guide groove 36b formed in the other side of the first direction X. The stopper guide pins 28 are slid along the guide grooves 36b, such that the first wedge member 21A and the second wedge member 21B can move in the first direction X. [0054]
The first arm member 31 and the second arm member 32 supported to the rotating shaft 37 penetrate through a cylindrical hole of the body portion 36 along the second direction Y. [0055]
Figs. 5A to 5C are views illustrating the operating mechanism 13. It should be noted that the body portion 36 is omitted in Figs. 5A to 5C.
As illustrated in Fig. 5A, the first arm member 31 and the second arm member 32 have a bilaterally symmetrical shape. The first arm member 31 and the second arm member 32 are formed in a substantially flat plate shape extending along the second direction Y. [0056]
A bearing portion 31c is formed at an intermediate portion of the first arm member 31 in the second direction Y. The bearing portion 31c protrudes from one surface of

28
the first arm member 31 facing the second arm member 32 toward the second arm member 32. The bearing portion 31c is rotatably supported to the rotating shaft 37. In addition, the bearing portion 31c is supported so as to be movable in the ascending and descending direction Z by the rotating shaft 37. [0057]
Likewise, a bearing portion 32c is formed at an intermediate portion of the second arm member 32 in the second direction Y. The bearing portion 32c protrudes from one surface of the second arm member 32 facing the first arm member 31 toward the first arm member 31. The bearing portion 32c is supported to the rotating shaft 37 so as to be rotatable and is supported to the rotating shaft 37 so as to be movable in the ascending and descending direction Z. [0058]
One end portions 31a and 32a of the first arm member 31 and the second arm member 32 in the second direction Y as compared with the rotating shaft 37 extend up to positions facing the wide surfaces 201a of the guide rail 201A. In addition, one end portions 31a and 32a of the first arm member 31 and the second arm member 32 are bent in a substantially U-shape. [0059]

29
One end portion 31a of the first arm member 31 has two facing pieces 31d and 31e facing each other in the second direction Y and a connection piece 31f connecting the two facing pieces 31d and 31e to each other. The facing piece 31d is bent from the first arm member 31 in a direction in which it becomes distant from the guide rail 201A along the first direction X. For this reason, one end portion 31a of the first arm member 31 is opened in a side facing the second arm member 32. [0060]
Likewise, one end portion 32a of the second arm member 32 has two facing pieces 32d and 32e facing each other in the second direction Y and a connection piece 32f connecting the two facing pieces 32d and 32e to each other. The facing piece 32d is bent from the second arm member 32 in a direction in which it becomes distant from the guide rail 201A along the first direction X. For this reason, one end portion 32a of the second arm member 32 is opened in a side facing the first arm member 31. [0061]
In addition, as illustrated in Figs. 3 and 5C, a first restricting plate 61A is fixed to an upper end portion of one end portion 31a of the first arm member 31 in the ascending and descending direction Z. A second restricting plate 61B is fixed to an upper end portion of

30
one end portion 32a of the second arm member 32 in the ascending and descending direction Z. The first
restricting plate 61A and the second restricting plate 61B cover openings of upper sides of one end portions 31a and 32a in the ascending and descending direction Z, respectively. [0062]
The boosting mechanism 38 is provided at one end portions 31a and 32a of the first arm member 31 and the second arm member 32. The boosting mechanism 38 has a first holding portion 50A and a second holding portion 50B. The first holding portion 50A is provided at one end portion 31a of the first arm member 31, and the second holding portion 50B is provided at one end portion 32a of the second arm member 32. [0063]
Since the first holding portion 50A and the second holding portion 50B have the same configuration, the first holding portion 50A will be described below.
As illustrated in Figs. 5A and 5C, the first holding portion 50A has first link pieces 51A, a second link piece 52A, and a braking shoe 53A. Two first link pieces 51A in the second direction Y and two first link pieces 51A in the ascending and descending direction Z, that is, a total of four first link pieces 51A are provided. One end portions

31
of the first link pieces 51A are rotatably supported to the two facing pieces 31d and 31e in one end portion 31a of the first arm member 31 through first rotating pins 54A. [0064]
In addition, the second link piece 52A is rotatably supported to the other end portions of the first link pieces 51A through second rotating pins 55A. The second link piece 52A has a bearing piece 56 and an attaching piece 57. The bearing piece 56 is disposed between the two first link pieces 51A and 51A facing each other in the second direction Y. In addition, two bearing pieces 56 are provided in the ascending and descending direction Z. The two bearing pieces 56 and 56 rotatably support the two first link pieces 51A and 51A facing each other in the ascending and descending direction Z through the second rotating pins 55A and 55A. [0065]
The attaching piece 57 is provided at an end portion of the bearing piece 56 at the guide rail 201A side. The attaching piece 57 faces the wide surface 201a of the guide rail 201A. The braking shoe 53A is fixed to one surface of the attaching piece 57 facing the wide surface 201a. [0066]
In the normal state in which the operating mechanism 13 is not operated, that is, at the time of the normal

32
operation of the elevator 1, a gap is formed between the braking shoe 53A and the wide surface 201a. In addition, the first link pieces 51A hang downward in the ascending and descending direction Z at end portions thereof at the guide rail 201A side by their own weights. Since the two first link pieces 51A are provided along the ascending and descending direction Z, the attaching piece 57 and the braking shoe 53A of the second link piece 52A can face in parallel with the wide surface 201a. [0067]
When the operating mechanism 13 is operated, such that the first arm member 31 rotates around the rotating shaft 37, the braking shoe 53A comes into contact with the wide surface 201a of the guide rail 201A (see Fig. 6). [0068]
As described above, in the first holding portion 50A according to the present embodiment, a link mechanism in which an interval between one end portion 31a of the first arm member 31 and the braking shoe 53A can be varied is configured by the first link pieces 51A and the second link piece 52A. That is, the boosting mechanism 38 can vary the interval from one end portion 31a of the first arm member 31 to the wide surface 201a of the guide rail 201A. [0069]

33
In addition, the actuator 33, the operating side urging member 34, the lock mechanism 35, and the connecting rod 39 are disposed at the other end sides of the first arm member 31 and the second arm member 32 in the second direction Y as compared with the bearing portions 31c and 32c. [0070]
The actuator 33 has an electromagnetic coil 41 and a plunger 42 attracted to the electromagnetic coil 41. The electromagnetic coil 41 is provided on one surface of the first arm member 31 facing the second arm member 32. The plunger 42 is provided on one surface of the second arm member 32 facing the first arm member 31. When a current flows to the electromagnetic coil 41, such that the electromagnetic coil 41 is excited, a magnetic attraction force is generated in the electromagnetic coil 41. The plunger 42 is attracted to the electromagnetic coil 41 by the magnetic attraction force generated in the electromagnetic coil 41. [0071]
The operating side urging member 34 and the connecting rod 39 are provided at the other end sides of the first arm member 31 and the second arm member 32 as compared with the actuator 33. The connecting rod 39 extends along the first direction X, and penetrates through

34
the other end portions of the first arm member 31 and the second arm member 32. The connecting rod 39 connects the other end portions of the first arm member 31 and the second arm member 32 to each other. [0072]
The operating side urging member 34 is formed of, for example, a compression coil spring. The operating side urging member 34 is interposed between the first arm member 31 and the second arm member 32. The connecting rod 39 penetrates through the operating side urging member 34. In addition, in the normal state in which the operating mechanism 13 is not operated, that is, at the time of the normal operation of the elevator 1, the operating side urging member 34 is held in a state in which it is compressed by the first arm member 31 and the second arm member 32 against its urging force. [0073]
The operating side urging member 34 is not limited to the compression coil spring, and may be other various members having elasticity, such as a leaf spring and a rubber having a U-shaped cross section. [0074]
In addition, the lock mechanism 35 is disposed at the other end sides of the first arm member 31 and the second arm member 32 as compared with the operating side

35
urging member 34. As illustrated in Fig. 5B, the lock mechanism 35 has a lock lever 43, a lock rotating shaft 44, a lock release member 45, and a lever receiving portion 46. [0075]
The lock lever 43 is rotatably supported to the other end portion 31b of the first arm member 31 in the second direction Y by the lock rotating shaft 44. A lock piece 43a is provided at an end portion of the lock lever 43 opposing the lock rotating shaft 44, that is, at an end portion of the lock lever 43 at the second arm member 32 side. The lock piece 43a is substantially vertically bent downward from the lock lever 43 in the ascending and descending direction Z. [0076]
The lock release member 45 is disposed below the lock lever 43 of the first arm member 31 in the ascending and descending direction Z. The lock release member 45 has a releasing solenoid 47, a push rod 48, and a locking urging member 49. The releasing solenoid 47 is fixed to one surface of the first arm member 31 facing the second arm member 32. [0077]
The push rod 48 has a rod pin 48a, a retaining protrusion 48b, and a support member 48c. The rod pin 48a penetrates through a cylindrical hole 47a of the releasing

36
solenoid 47 along the ascending and descending direction Z. An upper end portion of the rod pin 48a protruding upward from the cylindrical hole 47a in the ascending and descending direction Z comes into contact with the lock lever 43. [0078]
In addition, the retaining protrusion 48b is provided at the upper end portion of the rod pin 48a. It is possible to prevent the rod pin 48a from falling out of the cylindrical hole 47a of the releasing solenoid 47 by the retaining protrusion 48b. [0079]
The support member 48c is provided at a lower end portion of the rod pin 48a protruding downward from the cylindrical hole 47a in the ascending and descending direction Z. The locking urging member 49 is interposed between the support member 48c and the releasing solenoid 47. The locking urging member 49 is formed of an elastic member such as a compression coil spring or a rubber. [0080]
In the normal state in which the operating mechanism 13 is not operated, that is, at the time of the normal operation of the elevator 1, a current flows to the releasing solenoid 47, such that the rod pin 48a protrudes upward in the ascending and descending direction Z against

37
an urging force of the locking urging member 49. Therefore, at the time of the normal operation of the elevator 1, an end portion of the lock lever 43 at the lock piece 43a side is jumped upward in the ascending and descending direction Z. [0081]
In addition, when the current flowing to the releasing solenoid 47 is blocked, the rod pin 48a descends downward in the ascending and descending direction Z by the urging force of the locking urging member 49 (see Fig. 6B). The lock lever 43 is rotated around the lock rotating shaft 44 by its own weight. [0082]
It should be noted that an example in which the lock lever 43 is rotated by its own weight has been described in the present embodiment, but the present invention is not limited thereto. For example, a torsion coil spring may be provided between the lock lever 43 and the lock rotating shaft 44 or an urging spring urging the lock lever 43 downward in the ascending and descending direction Z may be provided, and the lock lever 43 may be rotated by an urging force of the torsion coil spring or the urging spring. [0083]
The lever receiving portion 46 is provided at a position facing the lock lever 43 on one surface of the

38
second arm member 32 facing the first arm member 31. A locking portion 46a is formed in the lever receiving portion 46. The locking portion 46a is a step surface recessed downward from the lever receiving portion 46 in the ascending and descending direction Z. When the lock piece 43a of the lock lever 43 is rotated downward in the ascending and descending direction Z, the lock piece 43a of the lock lever 43 comes into contact with the locking portion 46a (see Fig. 6B). [0084] 1-4. Operation Example of Emergency Stop Device
Next, an operation example of the emergency stop device 10A having the configuration described above will be described with reference to Figs. 6A to 9C. First, an example of operating the emergency stop device 10A will be described with reference to Figs. 6A to 7C.
Figs. 6A to 7C are views illustrating a state in which the operating mechanism 13 of the emergency stop device 10A is operated. [0085]
When the control device 170 determines that the descending speed of the car 120 reaches 1.3 times or more the rated speed when the car 120 (see Fig. 1) moves downward, the control device 170 blocks electrification to the electromagnetic coil 41 of the actuator 33. Therefore,

39
the excitation of the electromagnetic coil 41 is released, such that an electromagnetic attraction force for the electromagnetic coil 41 to attract the plunger 42 disappears in the electromagnetic coil 41. As a result, the urging to the operating side urging member 34 by the actuator 33 is released. [0086]
As illustrated in Fig. 6A, the other end portions of the first arm member 31 and the second arm member 32 are urged in a direction in which the other end portions become distant from each other in the first direction X by the urging force of the operating side urging member 34. For this reason, the first arm member 31 and the second arm member 32 are rotated around the rotating shaft 37. The other end portions of the first arm member 31 and the second arm member 32 move in the direction in which the other end portions become distant from each other, such that one end portions 31a and 32a of the first arm member 31 and the second arm member 32 move in a direction in which the one end portions approach each other. Therefore, as illustrated in Fig. 6C, the braking shoes 53A and 53B of the boosting mechanism 38 provided at the one end portions 31a and 32a of the first arm member 31 and the second arm member 32 are pressed against the wide surfaces 201a of the guide rail 201A. As a result, the guide rail 201 A is held

40
by one end portions 31a and 32a of the first arm member 31
and the second arm member 32.
[0087]
In addition, the control device 170 (see Fig. 1) also blocks electrification to the releasing solenoid 47 in the lock mechanism 35 when blocking electrification to the actuator 33. Therefore, as illustrated in Fig. 6B, the push rod 48 is urged by the locking urging member 49, such that it moves downward in the ascending and descending direction Z. [0088]
In addition, the push rod 48 moves downward in the ascending and descending direction Z, such that the lock lever 43 with which the push rod 48 comes into contact is rotated around the lock rotating shaft 44 by its own weight. The lock piece 43a of the lock lever 43 is locked to the locking portion 46a of the lock receiving portion 46. As a result, movement of the other end portions of the first arm member 31 and the second arm member 32 in the direction in which the other end portions approach each other is restricted by the lock lever 43. [0089]
The car 120 (see Fig. 1) further descends, such that one end portions 31a and 32a of the first arm member 31 and the second arm member 32 also move downward in the

41
ascending and descending direction Z with respect to the guide rail 201A. Since the braking shoes 53A and 53B are pressed against the wide surfaces 201a of the guide rail 201A, the braking shoes 53A and 53B are suppressed from moving downward in the ascending and descending direction Z by a frictional force with the wide surfaces 201a. [0090]
For this reason, the first link pieces 51A and 51B of the first holding portion 50A and the second holding portion 50B in the boosting mechanism 38 are rotated around the first rotating pins 54A and 54B, respectively, as illustrated in Fig. 7C. In addition, the other end portions of the first link pieces 51A and 51B are also rotated by second rotating pins 55A and 55B. As a result, the first link pieces 51A and 51B are displaced in parallel with the first direction X. [0091]
The first link pieces 51A are displaced in parallel with the first direction X, such that a length t2 from each of the first rotating pins 54A to a contact surface of the braking shoe 53A is slightly larger than a length t1 in a state in which the first link pieces 51A is inclined with respect to the first direction X as illustrated in Fig. 6C (t2 > t1). An interval between one end portions 31a and 32a of the first arm member 31 and the second arm member 32

42
in the first direction X is increased. For this reason, a force acts on one end portions 31a and 32a of the first arm member 31 and the second arm member 32 in a direction in which one end portions 31a and 32a become distant from each other. A reaction force F1 is generated at the other end portions of the first arm member 31 and the second arm member 32 in a direction in which the other end portions approach each other, that is, in a direction in which the operating side urging member 34 is compressed. [0092]
However, as illustrated in Fig. 7B, the lock lever 43 of the lock mechanism 35 comes into contact with the locking portion 46a of the lock receiving portion 46, such that the movement of the other end portions of the first arm member 31 and the second arm member 32 in the direction in which the other end portions approach each other is restricted. Therefore, a force with which the braking shoes 53A and 53B are pressed against the guide rail 201A by the boosting mechanism 38 is further increased from the urging force of the operating side urging member 34. [0093]
When the first link pieces are further rotated upward in the ascending and descending direction Z from a state in which the first link pieces are parallel with the first direction X, the force with which the braking shoes

43
53A and 53B are pressed against the guide rail 201A is decreased. On the other hand, as illustrated in Fig. 7C, the first restricting plate 61A is provided at the upper end portion of one end portion 31a of the first arm member 31 in the ascending and descending direction Z, and the second restricting plate 61B is provided at the upper end portion of one end portion 32a of the second arm member 32 in the ascending and descending direction Z. [0094]
When the first link pieces 51A of the first holding portion 50A are rotated, the second link piece 52A comes into contact with the first restricting plate 61A. In addition, when the first link pieces 51B of the second holding portion 50B are rotated, the second link piece 52B comes into contact with the second restricting plate 61B. Therefore, further rotation operation of the first link pieces 51A and 51B upward in the ascending and descending direction Z from the state in which the first link pieces 51A and 51B are parallel with the first direction X is restricted. As a result, it is possible to prevent the force with which the braking shoes 53A and 53B of the boosting mechanism 38 are pressed against the guide rail 201A from being decreased in a state in which the force is increased. [0095]

44
Movement of the operating mechanism 13 in the ascending and descending direction Z with respect to the guide rail 201A is braked by a frictional force between the braking shoes 53A and 53B and the guide rail 201A. The car 120 (see Fig. 1) further continuously moves downward, such that the body portion 36 (see Fig. 4) of the operating mechanism 13 moves upward in the ascending and descending direction Z with respect to the guide members 22A and 22B and the arm portions 23A and 23B of the braking mechanism 12 along the rotating shaft 37. [0096]
In addition, the first wedge member 21A and the second wedge member 21B placed on the body portion 36 also move upward in the ascending and descending direction Z with respect to the guide members 22A and 22B and the arm portions 23A and 23B. In addition, the first wedge member 21A and the second wedge member 21B move along the guide members 22A and 22B and the tapered surfaces of the arm portions 23A and 23B, such that the first wedge member 21A and the second wedge member 21B move in a direction in which they approach each other. [0097]
The first wedge member 21A and the second wedge member 21B are pressed against the wide surfaces 201a of the guide rail 201A. That is, the wide surfaces 201a of

45
the guide rail 201A are held by the first wedge member 21A and the second wedge member 21B. Therefore, the downward movement of the car 120 can be braked and stopped by the emergency stop device 10A. [0098]
Since braking operations in the emergency stop device 10B and the balance weight side emergency stop device 10C are the same as that of the emergency stop device 10A, a description will thus be omitted. [0099]
According to the emergency stop device 10A according to the present embodiment, it is possible to increase the force with which the braking shoes 53A and 53B are pressed against the guide rail 201A as compared with the urging force of the operating side urging member 34 by the boosting mechanism 38 and the lock mechanism 35. For this reason, it is possible to weaken the urging force of the operating side urging member 34. Therefore, it is also possible to weaken the electromagnetic attraction force of the actuator 33 maintaining the operating side urging member 34 in a state in which the operating side urging member 34 is compressed against its urging force at the time of the normal operation of the elevator 1. As a result, a capacity of the actuator 33 can be reduced, such

46
that an increase in the capacity of the actuator 33 can be
suppressed.
[0100]
Next, an operation example of returning the emergency stop device 10A from a braking state to the normal state will be described with reference to Figs. 8A to 9C.
Figs. 8A to 9C are views illustrating an operation example of returning the operating mechanism 13 from the braking state to the normal state. [0101]
In the case of returning the emergency stop device 10A, the control device 170 (see Fig. 1) first moves the car 120 upward by driving the hoisting machine 100 in order to release the holding by the first wedge member 21A and the second wedge member 21B of the braking mechanism 12. In addition, the control device 170 performs
electrification on the releasing solenoid 47 of the lock mechanism 35 in the operating mechanism 13. [0102]
The car 120 moves upward, such that the operating mechanism 13 also moves upward in the ascending and descending direction Z along the guide rail 201A. It should be noted that the braking shoes 53A and 53B are in a state in which they are held on the wide surfaces 201a of

47
the guide rail 201A. For this reason, as illustrated in Figs. 8A and 8C, in a state in which the braking shoes 53A and 53B are in contact with the guide rail 201A, the other end portions of the first link pieces 51A and 51B of the first holding portion 50A and the second holding portion 50B are rotated downward in the ascending and descending direction Z around the first rotating pins 54A and 54B and the second rotating pins 55A and 55B. In addition, the other end portions of the first link pieces 51A and 51B are also rotated by the second rotating pins 55A and 55B. Therefore, the force with which the braking shoes 53A and 53B are pressed against the guide rail 201A by the boosting mechanism 38 is relaxed. [0103]
The force with which the braking shoes 53A and 53B are pressed against the guide rail 201A by the boosting mechanism 38 is relaxed, such that a force with which the lock piece 43a and the locking portion 46a of the lock receiving portion 46 in the lock mechanism 35 come into contact with each other is also relaxed. In addition, the electrification is performed on the releasing solenoid 47, such that the push rod 48 moves upward in the ascending and descending direction Z against the urging force of the locking urging member 49, as illustrated in Fig. 8B. Therefore, the lock piece 43a of the lock lever 43 is

48
rotated upward in the ascending and descending direction Z by the push rod 48. As a result, the contact between the lock piece 43a and the locking portion 46a of the lock receiving portion 46 is released, such that the movement of the other end portions of the first arm member 31 and the second arm member 32 in the direction in which the other end portions approach each other is released. [0104]
The car 120 moves upward, such that the fixed housing 11 (see Fig. 3) of the car 120 also moves upward together with the car 120. The housing 11 moves upward, such that the first wedge member 21A and the second wedge member 21B move in the ascending and descending direction Z with respect to the housing 11. That is, the first wedge member 21A and the second wedge member 21B relatively move downward in the ascending and descending direction Z along the guide members 22A and 22B and the tapered surfaces of the arm portions 23A and 23B. For this reason, the first wedge member 21A and the second wedge member 21B move in a direction in which they become distant from each other along the first direction X. Therefore, the force with which the first wedge member 21A and the second wedge member 21B hold the guide rail 201A is released. [0105]

49
Next, the control device 170 (see Fig. 1) moves the car 120 downward by driving the hoisting machine 100. As illustrated in Figs. 8A and 8C, the braking shoes 53A and 53B are in a state in which they are in contact with the guide rail 201A by the urging force of the operating side urging member 34. In this state, when the car 120 is moved downward, as illustrated in Figs. 9A and 9C, the first link pieces 51A and 51B of the first holding portion 50A and the second holding portion 50B are again rotated around the first rotating pins 54A and 54B. In addition, the other end portions of the first link pieces 51A and 51B are also rotated by the second rotating pins 55A and 55B. As a result, the first link pieces 51A and 51B are displaced in parallel with the first direction X. [0106]
The first link pieces 51A and 51B are displaced in parallel with the first direction X, such that the interval between one end portions 31a and 32a of the first arm member 31 and the second arm member 32 in the first direction X is increased. For this reason, a reaction force is generated at the other end portions of the first arm member 31 and the second arm member 32 in the direction in which the other end portions approach each other, that is, in the direction in which the operating side urging member 34 is compressed. In this case, as illustrated in

50
Fig. 9B, the lock mechanism 35 is released, such that the movement of the other end portions of the first arm member 31 and the second arm member 32 in the direction in which the other end portions approach each other is released. For this reason, the operating side urging member 34 is slightly compressed. [0107]
In addition, the other end portions of the first arm member 31 and the second arm member 32 move in the direction in which the other end portions approach each other, such that an interval between the electromagnetic coil 41 and the plunger 42 of the actuator 33 is decreased. The control device 170 performs the electrification on the electromagnetic coil 41 of the actuator 33 to excite the electromagnetic coil 41 to generate the magnetic attraction force in the electromagnetic coil 41. The plunger 42 is attracted to the electromagnetic coil 41 against the urging force of the operating side urging member 34 by the magnetic attraction force generated in the electromagnetic coil 41. Therefore, the first arm member 31 and the second arm member 32 are rotated in the direction in which one end portions 31a and 32a become distant from each other. [0108]
As described above, the first link pieces 51A and 51B are displaced in parallel with the first direction X to

51
slightly compress the operating side urging member 34 in advance and decrease the interval between the
electromagnetic coil 41 and the plunger 42, such that the plunger 42 can be easily attracted to the electromagnetic coil 41. Therefore, according to the emergency stop device 10A according to the present embodiment, the first link pieces 51A and 51B of the boosting mechanism 38 are displaced, such that the operation of returning the emergency stop device 10A from the braking state to the normal state can also be easily performed. [0109]
In addition, the plunger 42 is attracted to the electromagnetic coil 41, such that the operating side urging member 34 can be compressed, and the other end portions of the first arm member 31 and the second arm member 32 can thus be moved in the direction in which the other end portions approach each other. Therefore, the first arm member 31 and the second arm member 32 are rotated around the rotating shaft 37, and one end portion 31a of the first arm member 31 and one end portion 32a of the second arm member 32 move in the direction in which the one end portions become distant from each other. Therefore, the braking shoes 53A and 53B become distant from the guide rail 201A, such that a braking operation of the guide rail 201A by the operating mechanism 13 is released. As a

52
result, the operating mechanism 13 moves downward in the ascending and descending direction Z along the rotating shaft 37 by its own weight. [0110]
In addition, the operating mechanism 13 moves downward in the ascending and descending direction Z, such that the first wedge member 21A and the second wedge member 21B placed on the body portion 36 of the operating mechanism 13 also move downward in the ascending and descending direction Z. Therefore, the first wedge member 21A and the second wedge member 21B relatively move downward in the ascending and descending direction Z along the guide members 22A and 22B and the tapered surfaces of the arm portions 23A and 23B. As a result, the first wedge member 21A and the second wedge member 21B move in a direction in which they become more distant from each other along the first direction X to become distant from the wide surfaces 201a of the guide rail 201A. Therefore, the operation of returning the emergency stop device 10A from the braking state to the normal state is completed. [0111] 2. Second Embodiment
Next, an emergency stop device according to a second embodiment will be described with reference to Figs. 10A to 11.

53
Figs. 10A and 10B are views illustrating a boosting mechanism of an operating mechanism in an emergency stop device according to a second embodiment. Fig. 11 is a view illustrating the boosting mechanism in a state in which the operating mechanism is operated. [0112]
The emergency stop device according to the second embodiment is different in a configuration of the boosting mechanism in the operating mechanism from the emergency stop device according to the first embodiment. For this reason, the boosting mechanism will be described below, and the same portions as those of the emergency stop device 10A according to the first embodiment will be denoted by the same reference numerals and an overlapping description will be omitted. [0113]
As illustrated in Figs. 10A and 10B, the boosting mechanism 90 is provided at one end portions 31a and 32a of a first arm member 31 and a second arm member 32. The boosting mechanism 90 has a first holding portion 70A and a second holding portion 70B. The first holding portion 70A is provided at one end portion 31a of the first arm member 31, and the second holding portion 70B is provided at one end portion 32a of the second arm member 32. [0114]

54
Since the first holding portion 70A and the second holding portion 70B have the same configuration, the first holding portion 70A will be described below.
The first holding portion 70A has a rotating portion 71A, a support portion 72A, a braking shoe 73A, a rotating rod 74A, and a boosting urging member 75A. In addition, two rotating portions 71A, two rotating rods 74A, and two boosting urging members 75A are provided along an ascending and descending direction Z. [0115]
The rotating portion 71A has a pair of rotating pieces 81 and 81 and a support piece 82. The pair of rotating pieces 81 and 81 is disposed with a predetermined interval therebetween in a second direction Y. The pair of rotating pieces 81 and 81 is rotatably supported to the one end portion 31a of the first arm member 31 through first rotating pins 84A. [0116]
The support piece 82 is provided at portions of the pair of rotating pieces 81 and 81 at a wide surface 201a side of a guide rail 201A. The support piece 82 is disposed so as to be connected to the pair of rotating pieces 81 and 81. A sliding hole 82a is formed in the support piece 82. The sliding hole 82a penetrates from one surface of the support piece 82 to which the pair of

55
rotating pieces 81 and 81 is connected up to the other surface of the support piece 82 opposing one surface. A spring receiving pin 79 of a rotating rod 84 to be described below is slidably inserted into the sliding hole 82a. [0117]
The rotating rod 84 has the spring receiving pin 79 and a rotating piece 78. The spring receiving pin 79 is formed of a rod-shaped member. The spring receiving pins 79 are slidably inserted into the sliding holes 82a provided in a pair of support pieces 82 of the rotating portions 71A. The rotating piece 78 is provided at an end portion of the spring receiving pin 79 opposing an end portion of the spring receiving pin 79 inserted into the sliding hole 82a. The rotating piece 78 is rotatably supported to the support portion 72A through a second rotating pin 85A to be described below. [0118]
In addition, the boosting urging member 75A formed of a compression coil spring is attached to the spring receiving pin 79. The boosting urging member 75A is interposed between the support piece 82 of the rotating portion 71A and the rotating piece 78 of the rotating rod 84. The boosting urging member 75A is not limited to the

56
compression coil spring, and may be other various members having elasticity, such as a leaf spring and a rubber. [0119]
The support portion 72A has a plurality of bearing pieces 76 and an attaching piece 77. Two bearing pieces 76 are disposed to face each other in the second direction Y. In addition, two pairs of bearing pieces 76 and 76 each disposed to face each other in the second direction Y are disposed with an interval therebetween in the ascending and descending direction Z. [0120]
The rotating piece 78 of the rotating rod 84 is inserted between the pair of bearing pieces 76 and 76 facing each other in the second direction Y. The pair of bearing pieces 76 and 76 is rotatably supported to the rotating piece 78 through the second rotating pin 85A. [0121]
The attaching piece 77 is provided at end portions of the plurality of bearing pieces 76 at the guide rail 201A side. The attaching piece 77 faces the wide surface 201a of the guide rail 201A. The braking shoe 73A is fixed to one surface of the attaching piece 77 facing the wide surface 201a. [0122]

57
In a normal state in which the operating mechanism is not operated, that is, at the time of a normal operation of an elevator 1, the rotating rod 84 hangs downward in the ascending and descending direction Z at an end portion thereof at the guide rail 201A side by its own weight. Since two rotating rods 84 are provided along the ascending and descending direction Z, the attaching piece 77 of the support portion 72A and the braking shoe 73A can face the wide surface 201a in parallel with the wide surface 201a. [0123]
In addition, when the operating mechanism is operated, the braking shoe 73A provided in the first arm member 31 and a braking shoe 73B provided in the second arm member 32 come into contact with the wide surfaces 201a of the guide rail 201A. A car 120 (see Fig. 1) further descends, such that one end portions 31a and 32a of the first arm member 31 and the second arm member 32 also move downward in the ascending and descending direction Z with respect to the guide rail 201A. [0124]
As illustrated in Fig. 11, the rotating portion 71A is rotated around the first rotating pin 84A, such that the rotating rod 84 is rotated with respect to the support portion 72A around the second rotating pin 85A. Therefore, the spring receiving pin 79 of the rotating rod 84 is

58
displaced in parallel with a first direction X. In addition, the spring receiving pin 79 is displaced in parallel with the first direction X, such that when the rotating rod 84 is rotated, the spring receiving pin 79 is slid in the sliding hole 82a of the rotating portion 71A. For this reason, an interval between the rotating portion 71A and the support portion 72A is decreased. [0125]
The interval between the rotating portion 71A and the support portion 72A is decreased, such that the boosting urging member 75A is compressed by the rotating portion 71A and the rotating piece 78 against its urging force. Therefore, the urging force of the boosting urging member 75A is added, with respect to an urging force of an operating side urging member 34, to a force with which the braking shoes 73A and 73B press the guide rail 201A. As a result, the force with which the braking shoes 53A and 53B press the guide rail 201A by the boosting mechanism 90 can be increased. [0126]
Since the other configurations are the same as those of the emergency stop device 10A according to the first embodiment, a description thereof will be omitted. According to the emergency stop device having the boosting mechanism 90 as described above, it is possible to obtain

59
the same action and effect as those of the emergency stop device 10A according to the first embodiment described above. [0127]
In the emergency stop device 10A according to the first embodiment, when the first link pieces 51A and 51B are displaced in parallel with the first direction X, the intervals from one end portions 31a and 32a of the first arm member 31 and the second arm member 32 to the guide rail 201A are increased by the boosting mechanism 38. For this reason, in the emergency stop device 10A according to the first embodiment, the first arm member 31 and the second arm member 32 in the operating mechanism 13 are slightly bent. For this reason, when designing the first arm member 31 and the second arm member 32, it is necessary to take the bending of the first arm member 31 and the second arm member 32 into consideration. [0128]
On the other hand, in the boosting mechanism 90 of the emergency stop device according to the second embodiment, when the rotating rod 84 is displaced in the first direction, the rotating rod 84 is slid, and the boosting urging member 75A is compressed. For this reason, it is possible to prevent occurrence of bending in the first arm member 31 and the second arm member 32.

60
Therefore, the first arm member 31 and the second arm
member 32 can be more easily designed as compared with the
emergency stop device 10A according to the first embodiment.
[0129]
3. Third Embodiment
Next, an emergency stop device according to a third embodiment will be described with reference to Figs. 12 and 13.
Fig. 12 is a schematic configuration diagram illustrating an emergency stop device according to a third embodiment, and Fig. 13 is a perspective view illustrating an operating mechanism of the emergency stop device. [0130]
In the emergency stop device 300 according to the third embodiment, two braking mechanisms are operated by one operating mechanism. For this reason, a boosting mechanism will be described below, and the same portions as those of the emergency stop device according to the first embodiment will be denoted by the same reference numerals and an overlapping description will be omitted. [0131]
As illustrated in Fig. 12, the emergency stop device 300 includes a first braking mechanism 301A and a second braking mechanism 301B that are provided at a lower end portion of a car 120A, an operating mechanism 302, a first

61
pulling rod 303A, a second pulling rod 303B, and an interlocking mechanism 304. The first braking mechanism 301A is disposed to face a guide rail 201A, and the second braking mechanism 301B is disposed to face a guide rail 201B. [0132]
Each of the first braking mechanism 301A and the second braking mechanism 301B has a first wedge member 21A and a second wedge member 21B, similarly to the braking mechanism 12 according to the first embodiment. In addition, the first wedge member 21A and the second wedge member 21B of the first braking mechanism 301A are connected to an end portion of the first pulling rod 303A, and the first wedge member 21A and the second wedge member 21B of the second braking mechanism 301B are connected to an end portion of the second pulling rod 303B. The first pulling rod 303A and the second pulling rod 303B are pulled upward in an ascending and descending direction Z, such that the first wedge members 21A and the second wedge members 21B are pulled upward. [0133]
It should be noted that since other configurations of the first braking mechanism 301A and the second braking mechanism 301B are the same as those of the braking

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mechanism 12 according to the first embodiment, a
description thereof will be omitted.
[0134]
The operating mechanism 302 and the interlocking mechanism 304 are installed at an upper end portion of the car 120. The interlocking mechanism 304 has a first operating lever 305A, a second operating lever 305B, a first rotating shaft 306A, a second rotating shaft 306B, an interlocking shaft 307, and a support bracket 310. [0135]
The first rotating shaft 306A is provided on the support bracket 310 at an end portion at the guide rail 201A side in the upper end portion of the car 120. In addition, the second rotating shaft 306B is provided at an end portion at the guide rail 201B side in the upper end portion of the car 120. [0136]
In addition, the support bracket 310 has a first stopper 311 and a second stopper 312. The first stopper 311 is provided at an upper end portion of the support bracket 310 in the ascending and descending direction Z, and the second stopper 312 is provided at a lower end portion of the support bracket 310 in the ascending and descending direction Z. [0137]

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As illustrated in Figs. 12 and 13, the first operating lever 305A is rotatably supported to the first rotating shaft 306A. The first operating lever 305A is formed in a substantially T shape. The first operating lever 305A has a rotating piece 305a and a connecting piece 305b. [0138]
The rotating piece 305a protrudes substantially vertically from an intermediate portion of the connecting piece 305b in a longitudinal direction toward the guide rail 201A. It should be noted that the first rotating shaft 306A is provided at a place where the rotating piece 305a and the connecting piece 305b are connected to each other. The first pulling rod 303A and the operating mechanism 302 are connected to an end portion of the rotating piece 305a opposing the connecting piece 305b. [0139]
As illustrated in Fig. 13, the operating mechanism 302 includes a first arm member 331, a second arm member 332, an actuator 333, an operating side urging member 334, a lock mechanism 335, a rotating shaft 337, a boosting mechanism 338, and a connecting rod 339, similarly to the operating mechanism 13 according to the first embodiment. The operating mechanism 302 is connected to the rotating piece 305a through the rotating shaft 337. It should be

64
noted that since the other configurations are the same as those of the operating mechanism 13 according to the first embodiment, a description thereof will be omitted. [0140]
In addition, an example in which the operating mechanism 302 according to the third embodiment is connected to the first operating lever 305A through the rotating shaft 337 has been described, but the present invention is not limited thereto. For example, as in the operating mechanism 13 according to the first embodiment, a body portion 36 may be provided, and may be connected to the first operating lever 305A. [0141]
One end portion of the interlocking shaft 307 in an axial direction is connected to a lower end portion of the connecting piece 305b in the ascending and descending direction Z. As illustrated in Fig. 12, the second operating lever 305B is connected to the other end portion of the interlocking shaft 307 in the axial direction. [0142]
The second operating lever 305B is formed in a substantially T shape, similarly to the first operating lever 305A. The second operating lever 305B is rotatably supported to the second rotating shaft 306B. In addition,

65
the second pulling rod 303B is connected to the second
operating lever 305B.
[0143]
When the operating mechanism 302 is operated at the time of downward movement of the car 120, the guide rail 201A is held by the first arm member 331 and the second arm member 332. For this reason, the operating mechanism 302 is pulled upward in the ascending and descending direction Z with respect to the car 120. The operating mechanism 302 is pulled upward in the ascending and descending direction Z, such that the first operating lever 305A is rotated around the first rotating shaft 306A to pull the first pulling rod 303A upward in the ascending and descending direction Z. The first pulling rod 303A is pulled upward, such that the first wedge member 21A and the second wedge member 21B of the first braking mechanism 301A are pulled upward to hold the guide rail 201A. [0144]
In addition, the first operating lever 305A is rotated, such that the second operating lever 305B connected to the first operating lever 305A through the interlocking shaft 307 is rotated around the second rotating shaft 306B. The second operating lever 305B is rotated, such that the second pulling rod 303B connected to the second operating lever 305B is pulled upward in the

66
ascending and descending direction Z. Therefore, the first wedge member 21A and the second wedge member 21B of the second braking mechanism 301B are pulled upward to hold the guide rail 201B. As a result, according to the emergency stop device 300 according to the third embodiment, one operating mechanism 302 is operated, such that two braking mechanisms 301A and 301B can be operated by the interlocking mechanism 304. [0145]
It should be noted that an example in which the two braking mechanisms 301A and 301B are operated by the interlocking mechanism 304 has been described in the emergency stop device 300 according to the third embodiment, but the present invention is not limited thereto, and three or more braking mechanisms may be operated through the interlocking mechanism. [0146]
Since the other configurations are the same as those of the emergency stop device 10A according to the first embodiment, a description thereof will be omitted. According to the emergency stop device 300 as described above, it is possible to obtain the same action and effect as those of the emergency stop device 10A according to the first embodiment described above. [0147]

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It should be noted that the present invention is not limited to the embodiments described above and illustrated in the drawings, and can be variously modified without departing from the gist of the present invention described in the claims. [0148]
It should be noted that an example in which the lock release member 45 including the releasing solenoid 47 and the push rod 48 is provided in order to manipulate the lock lever 43 has been described in the embodiment described above, but the present invention is not limited thereto. For example, a drive motor may be provided on the lock rotating shaft 44 around which the lock lever 43 is rotated to rotate the lock rotating shaft 44 itself, or other various components can be used as a component that manipulates the lock lever 43. [0149]
Alternatively, at the time of the normal operation of the elevator 1, the lock piece 43a of the lock lever 43 comes into contact with the upper end portion of the second arm member 32, such that when the other end portions of the first arm member 31 and the second arm member 32 become distant from each other, the lock lever 43 may be configured to be rotated by its own weight. In this case,

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when the lock is released, it is necessary to release the
lock lever 43 with the hands of a worker.
[0150]
In addition, an example in which the lock mechanism 35 is provided at the other end portions of the arm members
31 and 32 has been described, but the present invention is
not limited thereto. The lock mechanism 35 may be a
component that can restrict a rotation operation of the
first arm member 31 and the second arm member 32 when one
end portion 31a of the first arm member 31 and one end
portion 32a of the second arm member 32 move in the
direction in which the one end portions approach each other. For this reason, the lock mechanism 35 may be provided at one end portions 31a and 32a side of the arm members 31 and
32 as compared with the rotating shaft 37.
[0151]
It is preferable that the lock mechanism 35 is provided at the other end portion distant from the rotating shaft 37 rather than a position close to the rotating shaft 37. Therefore, it is possible to restrict the rotation operation of the arm members 31 and 32 with a force smaller than that in a case of disposing the lock mechanism 35 at the position close to the rotating shaft 37. [0152]

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Further, an example in which the operating mechanism 13 is disposed below two wedge members 21A and 21B of the braking mechanism 12 in the ascending and descending direction Z has been described in the emergency stop device 10A according to the first embodiment, but the present invention is not limited thereto. For example, the operating mechanism 13 is disposed above the two wedge members 21A and 21B of the braking mechanism 12 in the ascending and descending direction Z, and a pulling rod that pulls the two wedge members 21A and 21B is attached to the two wedge members 21A and 21B. The operating mechanism 13 and the two wedge members 21A and 21B may be connected to each other through the pulling rod. That is, a position at which the operating mechanism 13 is disposed is not limited to the embodiment described above. [0153]
In addition, the elevating body is not limited to the car 120, and may also be the balance weight 140. [0154]
In the present specification, words such as “parallel” and “perpendicular” are used, but these words do not mean only precise “parallel” and “perpendicular” and may be in a state of “substantially parallel” or “substantially perpendicular” within a range in which

functions can be exerted, as well as in a state of "parallel" and "perpendicular".

We claim:

An emergency stop device that stops movement of an elevating body based on a state of upward and downward movement of the elevating body, the emergency stop device comprising:
a braking mechanism that is provided in the elevating body and stops the movement of the elevating body by holding a guide rail on which the elevating body is slid; and
an operating mechanism that operates a braking member of the braking mechanism,
wherein the operating mechanism includes:
a rotating shaft that stands along a direction in which the guide rail extends;
a pair of arm members that is rotatably supported to the rotating shaft;
a boosting mechanism that is provided at one end portions of the pair of arm members facing the guide rail and has a braking shoe coming into contact with the guide rail;
an operating side urging member that urges the one end portions of the pair of arm members in a direction in which the one end portions approach the guide rail;

an actuator that rotates the pair of arm members in a direction in which the one end portions of the pair of arm members become distant from the guide rail against an urging force of the operating side urging member; and
a lock mechanism that can restrict a rotation operation of the pair of arm members, and
the boosting mechanism is supported to the one end portions of the pair of arm members through a rotating pin so as to be rotatable in an ascending and descending direction of the elevating body, and is formed so that an interval from the rotating pin to the braking shoe is variable.
2. The emergency stop device according to claim 1,
wherein the boosting mechanism has
a first link piece that is rotatably supported to the one end portions of the pair of arm members through the rotating pin, and
a second link piece to which the braking shoe is attached and which is rotatably connected to the first link piece.
3. The emergency stop device according to claim 1,
wherein a boosting urging member having elasticity
is disposed between the rotating pin and the braking shoe.

4. The emergency stop device according to any one of
claims 1 to 3,
wherein a restricting plate is provided at the one end portions of the pair of arm members, the restricting plate restricting an upward rotation operation of the boosting mechanism in the ascending and descending direction.
5. The emergency stop device according to claim 1,
wherein a plurality of the braking mechanisms are
provided in the elevating body, and
an interlocking mechanism that interlocks the plurality of braking mechanisms is provided.
6. The emergency stop device according to claim 1,
wherein the lock mechanism is provided at the other
end portion of the pair of arm members opposing the one end portions of the pair of arm members, the one end portions holding the rotating shaft.
7. An elevator including an elevating body that
moves upward and downward in a hoistway, the elevator
comprising:
a guide rail that stands in the hoistway and slidably supports the elevating body; and
an emergency stop device that stops the movement of the elevating body based on a state of the upward and downward movement of the elevating body,

wherein the emergency stop device includes:
a braking mechanism that is provided in the elevating body and stops the movement of the elevating body by holding the guide rail; and
an operating mechanism that operates a braking member of the braking mechanism,
the operating mechanism includes:
a rotating shaft that stands along a direction in which the guide rail extends;
a pair of arm members that is rotatably supported to the rotating shaft;
a boosting mechanism that is provided at one end portions of the pair of arm members facing the guide rail and has a braking shoe coming into contact with the guide rail;
an operating side urging member that urges the one end portions of the pair of arm members in a direction in which the one end portions approach the guide rail;
an actuator that rotates the pair of arm members in a direction in which the one end portions of the pair of arm members become distant from the guide rail against an urging force of the operating side urging member; and
a lock mechanism that can restrict a rotation operation of the pair of arm members, and

the boosting mechanism is supported to the one end portions of the pair of arm members through a rotating pin so as to be rotatable in an ascending and descending direction of the elevating body, and is formed so that an interval from the rotating pin to the braking shoe is variable.