KR20130053078A - A governor for elevator - Google Patents

Abstract

PURPOSE: An elevator governor is provided to prevent security accidents in advance by braking an elevator normally within a prescribed speed range. CONSTITUTION: A base is installed at the lower part of a frame. A rotational pulley is rotated by a governor rope. A first over-speed detection switch(5) outputs an electrical braking signal. A second over-speed detection switch(6) is operated mechanically. A braking part(7) brakes the governor rope mechanically.

Description

Elevator governor {A governor for elevator}

The present invention relates to an elevator governor, which is a safety device installed in an elevator, and in detail, when the car of the elevator is traveling at a speed exceeding the normal operating speed or the car falls free due to a failure of the elevator, the speed of the elevator is detected and It relates to an elevator governor for stopping operation.

If the car of the elevator is operating beyond the normal speed or free fall due to the failure of the elevator, the elevator shall be stopped for the safety of the passengers in the car. As such, a governor is generally adopted to stop the operation of an elevator in an emergency situation. The governor electrically and mechanically intercepts the driving of the car by outputting a braking command when the car of the elevator runs at an excessive speed.

Korean Patent Laid-Open Publication No. 2008-0044956 discloses a governor generally adopted for elevator safety driving under the title of 'Overspeed governor for elevator'. The governor disclosed in Korean Patent Laid-Open Publication No. 2008-0044956 performs elevator brakes electrically and mechanically on a primary and secondary basis by using a principle that a fly weight mounted on a rotating pulley moves outward by a centrifugal force. Characterized in that it can be.

That is, in the prior art, as shown in FIG. 1, two fly weights 400 are rotatably installed in the rotary pulley 300, and the fly weight 400 is centrifugal due to the rotation of the rotary pulley 300. The brakes of the elevator are realized by sequentially operating the primary speed detection switch (safety switch assembly 900) and the secondary speed detection switch (manipulation lever 500) in the frame in order to gradually move in the radial direction. It would be possible.

In the prior art as described above, two fly weights 400 for operating the speed detection switches 900 and 500 are configured such that two are arranged to face each other with respect to the center of the rotation pulley 300 as shown in the drawing. Therefore, when one fly weight does not operate the primary speed detection switch 900 while the fly weight 400 moves radially at an overspeed, when the fly weight on the opposite side operates the primary speed detection switch 900, Until the rotation pulley 300 has to rotate 180 degrees further.

If the rotation pulley 300 is rotated 180 degrees further, the rotation speed increases while rotating, and the speed of operating the primary speed detection switch 900 also increases proportionally. This is called a window effect. When the window effect is large and a difference in operating speed between the two fly weights 400 occurs, the primary speed detecting switch 900 is operated over a range of prescribed speeds, and thus the occupant A situation in which the safety of a person is seriously threatened can be produced.

The technical problem to be solved by the present invention is to provide an elevator governor that can reduce or minimize the window effect, and thus can implement a normal elevator braking within a defined speed range that can ensure occupant safety.

According to an aspect of the present invention as a means for solving the problem, the base is installed on the frame and the frame bottom; A rotating pulley rotatably mounted on a fixed shaft on the frame and rotating by a governor rope; A fly weight installed on the rotary pulley and deformed by the centrifugal force when the rotary pulley is rotated faster than the rated speed; A first speed detecting switch on the fixed shaft that is deformed in conjunction with the shape deformation of the fly weight and outputs an electric braking signal for braking the elevator; A second speed detecting switch rotatably assembled at the outer periphery of the fixed shaft and mechanically operated in association with the shape deformation of the fly weight; A brake unit mounted to a base and mechanically braking the governor rope by a mechanical output of a second overspeed detection switch; And an interlock mechanism for operating the brake unit in association with a mechanical operation of the second speed detecting switch.

In the present embodiment, the first and second speed detecting switch may be configured to be positioned inward of the fly weight installed on the rotary pulley.

In addition, the fly weight may have a rectangular configuration in which two pairs of vertical bars facing each other in parallel and horizontal bars are connected to each other so as to be refracted, and penetrate a boss formed at the center of the pair of vertical bars or horizontal bars facing parallel to each other. By installing two pivot points on the rotary pulley by a binding member, the cross-sectional shape may be changed into a lozenge with respect to the two pivot points.

In this case, the boss may be configured to separate the fly weight from the rotary pulley by a distance that the fly weight deformed by the centrifugal force can restrain the second speed detecting switch to operate the same.

In addition, in the present embodiment, the first speed detecting switch includes a plate-shaped panel and a ring-shaped switch installed on one surface of the panel, wherein the ring-shaped switch has two or more curved switch bars. May be configured to be mutually refracted, and when the switch bar is deformed in a mutually refracted direction, the switching element provided at the refraction portion may be shorted to output an electric braking signal for elevator brake.

In this case, the ring-shaped switch may be a configuration in which the shape is deformed in conjunction with the fly weight shape deformation by two or more force transmission members installed on the fly weight.

In addition, the second speed detecting switch may be a cylindrical rotating body that is press-constrained to the fly weight that is deformed by centrifugal force and rotates together.

In addition, the braking part includes a fixed shoe formed on one side of the base and a rope catch facing the fixed shoe with a governor rope interposed therebetween, wherein the rope catch has an elastic horizontal member tip that is elastically installed in the base. It may be configured to be connected to the rotatable and to restrain the movement of the governor rope located between the fixed shoe while rotating downward by the interlock mechanism mechanical operation.

At this time, the linkage mechanism is a support bar having a long bar shape having a pivot point formed on the frame, a connection end formed at one end of the support bar and having a connection member connected to an outer surface of the second speed detection switch, and the rope catch; A configuration consisting of a hook end formed at the other end of the support bar for detachable connection may be applied.

According to the elevator governor according to the embodiment of the present invention, when the rotary pulley rotates faster than the prescribed speed, the cross-section of the flyweight is narrowed by the centrifugal force, regardless of the circumferential position of the flyweight. The first speed detecting switch and the second speed detecting switch located inward may be sequentially operated. That is, according to the position of the fly weight, there is an advantage that the window effect of rotating the rotation pulley 180 degrees further does not occur.

When the window effect does not occur as described above, even if the rated speed is exceeded, accurate braking of the car can be realized within the set operating speed range, and when the stop exceeds the set speed, that is, the lift exceeds the prescribed stop speed. In the event of a stop, it is possible to avoid a situation in which passengers are at serious risk. In other words, there is an effect of realizing the braking of the normal elevator within the prescribed speed range that can ensure the occupant safety.

1 is a front view schematically showing a governor for the elevator applied in the prior art.
Figure 2 is an exploded perspective view of the governor for the elevator according to an embodiment of the present invention.
3 is an exploded side view of the governor according to FIG. 2;
Figure 4 is a perspective view of the elevator governor according to the embodiment of the present invention.
5 is a side view of the coupling of the governor according to FIG.
Figure 6 is a front view of the elevator governor coupled state according to an embodiment of the present invention, respectively.
Figure 7 is an enlarged perspective view of the main portion for showing that the second speeding switch and the interlock mechanism is interconnected interconnected in the elevator governor according to an embodiment of the present invention.
8 and 9 are operation state diagram showing the elevator control process performed by the elevator governor according to an embodiment of the present invention, a view showing a state in which the first overspeed detection switch is operated by the fly weight.
FIG. 10 is an operation state diagram illustrating an elevator control process performed by an elevator governor according to an exemplary embodiment of the present invention, in which a second overspeed detection switch is operated by a fly weight. FIG.
FIG. 11 is an operating state diagram for illustrating an operation performed by the brake unit to mechanically brake the elevator in association with a second speed detection switch operation; FIG.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the elevator governor according to a preferred embodiment of the present invention. In the description of the present invention, a detailed description of known configurations will be omitted, and a detailed description of configurations that may unnecessarily obscure the gist of the present invention will be omitted.

2 and 3 respectively show an exploded perspective view and an exploded side view of the elevator governor according to an embodiment of the present invention, Figures 4 and 5 are respectively a perspective view and a combined side view of the elevator governor according to an embodiment of the present invention. Indicates. And Figure 6 shows a front view of the elevator governor coupled state according to an embodiment of the present invention.

2 to 6, the elevator governor according to the embodiment of the present invention, the rotary pulley 3 rotated by the governor rope 12, the fly weight 4 installed on the rotary pulley 3, the fly In order to mechanically restrain the movement of the governor rope 12 in conjunction with the operation of the first speed detecting switch 5, the second speed detecting switch 6, and the second speed detecting switch 6 operating as the weight 4. And an interlock mechanism (8) for interlocking the brake unit (7) and the second speed detecting switch (6) and the brake unit (7).

The rotary pulley 3 is rotatably mounted on a fixed shaft 10 on the frame 1, which is mounted vertically on the base 2. The rotary pulley 3 is connected to a governor rope 12 connected to a car (not shown) of the elevator, and the governor rope 12 moves in the longitudinal direction in association with the elevator car lift of the elevator 3. ) Is forcibly rotated. That is, the rotary pulley 3 rotates by the flow of the governor rope 12 wound along its circumferential surface.

The fly weight 4 is installed on the rotary pulley 3 that is rotated by the governor rope 12 and is deformed by the centrifugal force when the rotary pulley 3 rotates faster than the rated speed. In order to implement a structure whose shape is deformed under the influence of the centrifugal force, the fly weight 4 has two pairs of vertical bars 40 and horizontal bars 42 facing in parallel to each other, as shown in FIGS. 2 to 4. May be a rectangular configuration that is deflectably interconnected.

A boss 44 is formed at a constant height in the center of the pair of vertical bars 40 or horizontal bars 42 facing in parallel with each other, and the fly weight is formed through the binding member B penetrating the boss 44. (4) can be assembled to the rotary pulley (3) in the form of two pivot points (P1, P2). Therefore, when the rotary pulley 3 reaches the specified speed, the cross weight of the fly weight 4 is changed into a rhombic shape based on the two pivot points P1 and P2, and the first and second overspeed detection switches ( 5) (6) is activated.

In this case, the boss 44 serves as a connector to allow the fly weight 4 to be connected to the rotary pulley 3 while forming two pivot points P1 and P2 as described above, while being deformed by centrifugal force. It also serves as a gap retainer for separating the fly weight 4 from the rotation pulley 3 by a distance that the weight 4 can restrain the outside of the second speed detecting switch 6 to be described later.

The first speed detecting switch 5 outputs an electric braking signal for braking the elevator in conjunction with the fly weight 4. The first speed detecting switch 5 is assembled in a form of being fitted into and fixed to the fixed shaft 10 of the frame 1, and a plate-shaped panel 50 and a ring-shaped switch installed on one surface of the panel 50 ( 52). In this case, the switch 52 may be a ring-shaped switch in which three curved switch bars (switch-bars) are mutually refracted as shown in the drawing, and the shape thereof may be changed in conjunction with the operation of the fly weight 4.

In order to implement a switch operating in conjunction with the fly weight 4 operation, the switch 52 constituting the first speed detecting switch 5 is inside the above fly weight 4 mounted on the rotary pulley 3. At least two force transmission members 46 (see FIG. 5) which transmit a force in the direction of pinching the switch 52 when the fly weight 4 is operated outside the ring-shaped switch 52. May be installed on the fly weight 4 at regular intervals.

Accordingly, when the cross weight of the fly weight 4 is changed into a rhombic shape by centrifugal force, the force transmission member 46 moves inward toward the rotational central axis with the fly weight 4 deformation to the switch 52. The force transmission member 46 connected to the switch 52 is forced by the centrifugal force to continue to retract it, so that the switch 52 is deflected into a shape as shown in FIG. 10 to be described later. It is deformed and electrically turned off, through which a primary electrical braking signal is output.

The second speed detecting switch 6 is rotatably assembled on the outer edge of the fixed shaft 10, and the second mechanical braking is not performed when the elevator does not stop despite the electrical control by the first speed detecting switch 5 described above. Output mechanical braking signal for The second speed detecting switch 6 may be a cylindrical rotating body located inside the fly weight 4, and when the fly weight 4 is deformed by centrifugal force, the second weight detection switch 6 is bitten together with the fly weight 4. It outputs mechanical braking signal while rotating.

The mechanical braking signal by the second overspeed detection switch 6 is transmitted to the braking section 7 via the interlock mechanism 8. In the present embodiment, the braking unit 7 forcibly restrains the governor rope 12 in conjunction with the operation of the second speed detecting switch 6, and thus serves to forcibly brake the driving of the elevator. For this mechanical braking, the braking part 7 is a rope catch which is spaced apart from the fixing shoe 70 with the fixing shoe 70 formed on one side of the base 2 and the governor rope 12 interposed therebetween. And 72.

The rope catch 72 is rotatably connected to the tip of the elastic horizontal member 74 that is elastically installed in the base 2. In addition, the support bar 80 constituting the interlock mechanism 8 is pulled up in a state of upward rotation so that the governor rope 12 can move between the fixed shoe 70. Therefore, when the traction state is released by the operation of the support bar 80, the movement is constrained in the form of strongly pressing the governor rope 12 existing between the fixed shoe 70 and the downward rotation.

The interlock mechanism 8 serves to operate the brake unit 7 in conjunction with the mechanical operation of the second speed detecting switch 6. To this end, the linkage mechanism 8 includes an elongated support bar 80 having a pivot point formed on the frame 1. In this case, as shown in FIG. 7, a connection end 82 formed with a connection member 83 for connecting to the outer surface of the second speed detecting switch 6 is formed at one end of the support bar 80. A stage 84 is provided.

The hook end 84 is detachably connected to the free end side of the rope catch 72, and the rope catch 72 free end side is connected to the hook end 84 in the state of FIG. 2 (or FIG. 4). As shown, the rope catch 72 is towed by the support bar 80 in an upwardly rotated state. Accordingly, when the support bar 80 is rotated in association with the rotation of the second speed detecting switch 6, the connection between the hook end 84 and the rope catch 72 is released, and thus the rope catch 72 is gravity Falling in the direction to restrain the governor rope (12).

Hereinafter, the first and second elevator braking processes performed by the elevator governor according to an embodiment of the present invention will be described in more detail in connection with the operation of the present invention.

8 and 9 are operational state diagrams showing an elevator control process performed by an elevator governor according to an embodiment of the present invention, wherein the first overspeed detection switch 5 is operated by the fly weight 4. It is a figure showing the appearance.

Referring to FIGS. 8 and 9, when the car of the elevator descends beyond the normal running speed, the speed of the governor rope 12 is increased and the speed of rotation of the rotary pulley 3 is increased so that the centrifugal force acting on the fly weight 4 is increased. Will increase. The fly weight 4 is deformed into a rhombic shape as shown in FIG. 9 by centrifugal force, and in this process, the force transmission member 46 installed on the fly weight 4 moves inward toward the rotational center axis along with the fly weight 4 deformation. Will move.

As the force transmission member 46 moves inward, the force transmission member 46 is connected to a ring-shaped switch constituting the first overspeed detection switch 5, and the force transmission in the state connected to the switch. The member 46 exerts a force in the direction of continuously closing the switch by centrifugal force. Accordingly, the switch 52 is refracted and deformed into the shape as shown in FIG. 10, and the refraction portion of the switch 52 is electrically shorted to output an electric braking signal for the electric brake of the elevator.

The electrical braking signal output through the first speed detecting switch 5 is transmitted to a control panel (not shown) in charge of driving the elevator, and the control panel is directly involved in driving the elevator car (a hoist motor, not shown). The driving of the elevator is stopped by stopping the driving of the elevator. That is, as the electrical braking signal output through the first speed detecting switch 5, primary electrical braking is performed to stop driving of the elevator.

If the elevator operation is not stopped despite the electrical control by the first overspeed detection switch 5, the second overspeed detection switch 6 is operated by the rotation of the rotating pulley 3, and the braking unit 7 is interlocked with it. By operation, the movement of the governor rope 12 connected with the elevator car is mechanically constrained and the elevator operation can be mechanically stopped. Referring to FIG. 10, a process in which the second speed detecting switch 6 is operated by the fly weight 4 will be described.

If the elevator continues to move without stopping despite the operation of the first overspeed detection switch 5, the rotational speed of the rotary pulley 3 also continues to increase, and the flyweight 4 installed on the rotary pulley 3 It is deformed into a narrower rhombic cross-sectional shape based on the pivot points P1 and P2. In this process, any one pair of two pairs of horizontal bars 42 and vertical bars 40 constituting the fly weight 4 mechanically restrains the second speed detecting switch 6 located therebetween.

When the second speed detecting switch 6 is mechanically constrained by the fly weight 4, the second speed detecting switch 6 rotates in the same direction with the fly weight 4 as shown in FIG. 11. do. In addition, when the second speed detecting switch 6 is rotated, the support bar 80 which is towing the rope catch 72 is rotated based on the pivot point P3, and the hook end 84 and the rope catch 72 are rotated. The connection state of the connected part is released.

When the pulled state of the rope catch 72 is dismantled, as shown by the arrow in the operating state diagram of FIG. 12, the rope catch 72 is rotated downward in the gravity direction by its own weight and is positioned between the fixed shoe 70 and the governor. The rope 12 is strongly pressed toward the fixed shoe 70 to restrain its movement. Accordingly, the car of the elevator is forcibly stopped moving, and this series of braking processes corresponds to the secondary mechanical braking.

According to the elevator governor according to the embodiment of the present invention described above, when the rotary pulley rotates faster than the prescribed speed, the cross-section of the flyweight is narrowed by the centrifugal force, and the circumferential position of the flyweight is changed. Regardless, the first speed detecting switch and the second speed detecting switch located therein may be sequentially operated. Therefore, the conventional window effect that the rotation pulley is rotated 180 degrees further depending on the position of the fly weight does not occur.

 When the window effect does not occur as described above, even if the rated speed is exceeded, accurate braking of the car can be realized within the set operating speed range, and when the stop exceeds the set speed, that is, the lift exceeds the prescribed stop speed. In the event of a stop, it is possible to avoid a situation in which passengers are at serious risk. In other words, it is possible to implement normal elevator braking within a defined speed range that can ensure occupant safety.

In the foregoing detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

1: frame 2: base
3: rotating pulley 4: fly weight
5: 1st speed detection switch 6: 2nd speed detection switch
7: braking part 8: interlocking mechanism
10: fixed shaft 12: governor rope
40: vertical bar 42: horizontal bar
44: boss 46: power transmission member
50 panel 52 ring type switch
70: fixed shoe 72: rope catch
74: elastic horizontal member 80: support bar
82: connecting end 84: ring end

Claims (9)

A base installed in the frame and the bottom of the frame;
A rotating pulley rotatably mounted on a fixed shaft on the frame and rotating by a governor rope;
A fly weight installed on the rotary pulley and deformed by the centrifugal force when the rotary pulley is rotated faster than the rated speed;
A first speed detecting switch on the fixed shaft that is deformed in conjunction with the shape deformation of the fly weight and outputs an electric braking signal for braking the elevator;
A second speed detecting switch rotatably assembled at the outer periphery of the fixed shaft and mechanically operated in association with the shape deformation of the fly weight;
A brake unit mounted to a base and mechanically braking the governor rope by a mechanical output of a second overspeed detection switch; And
And an interlock mechanism for operating the brake unit in association with a mechanical operation of a second speed detecting switch.
The method of claim 1,
And the first and second speed detecting switches are located inside the fly weight installed on the rotary pulley.
3. The method according to claim 1 or 2,
The fly weight has a rectangular configuration in which two pairs of vertical bars and horizontal bars facing in parallel to each other are connected to each other refractively,
An elevator governor, characterized in that it is installed to form two pivot points on the rotary pulley by a binding member penetrating through a boss formed in the center of the pair of vertical bars or horizontal bars facing parallel to each other.
The method of claim 3, wherein
The boss is a governor for the elevator, characterized in that spaced apart the fly weight from the rotary pulley by the distance that the fly weight deformed by the centrifugal force can be tightly constrained to the outside of the second speed detection switch.
3. The method according to claim 1 or 2,
The first speed detection switch,
Consists of a plate-shaped panel and a ring-shaped switch installed on one side of the panel,
The ring-shaped switch has a configuration in which two or more curved switch bars are connected to each other so as to be mutually refracted. An elevator governor, characterized in that for outputting an electrical braking signal.
The method of claim 5, wherein
The ring-shaped switch is a governor for the elevator, characterized in that the shape is deformed in conjunction with the weight shape deformation by two or more force transmission members installed on the fly weight.
3. The method according to claim 1 or 2,
The second speed detection switch,
An elevator governor characterized in that it is a cylindrical rotational body that is pressed and restrained by the fly weight that is deformed by centrifugal force to rotate together.
The method of claim 1,
The braking unit includes:
A fixed shoe formed on one side of the base;
And a rope catch facing the fixing shoe with a governor rope interposed therebetween.
The rope catch,
An elevator governor, which is rotatably connected to an end of an elastic horizontal member elastically installed in the base, and constrains the movement of the governor rope positioned between the fixed shoe while rotating downward by the interlock mechanism mechanical operation.
The method of claim 8,
The interlock mechanism,
A support bar having a long bar shape having a pivot point formed on the frame;
A connection end formed at one end of the support bar and having a connection member connected to an outer surface of a second speed detection switch; And
Elevator speed governor, characterized in that consisting of; ring end formed on the other end of the support bar for detachable connection with the rope catch.

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