JP2012158440A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change braking force of an emergency stop device in response to loading weight of a passenger cage.SOLUTION: The emergency stop device of an elevator decelerates and stops the passenger cage when the passenger cage lifts at an abnormal speed. A floor part 23 of the passenger cage is mounted on a frame body so as to displace up and down via an elastic body 25. The emergency stop device has press bodies, a pair of wedge bodies 36, and a lift member 37. The press bodies are disposed opposing to each other as pinching a guide rail, and are urged to a direction of pinching the guide rail. The pair of wedge bodies 36 move upward, and are forced between the guide rail and the press bodies when the passenger cage lifts at an abnormal speed. A lift stopper 60a limits the movement of the pair of wedge bodies 36, and opens the limitation of the movement of the pair of wedge bodies 36 as carrying capacity in a cage room increases and the floor body 23 displaces downward.

Description

  Embodiments of the present invention relate to an elevator equipped with an emergency stop device.

  A conventional elevator will be described with reference to FIGS.

  The elevator includes a car 20 and a counterweight (not shown) connected by a main rope 10. The car 20 moves up and down the hoistway 90 by the rotation of a drive sheave (not shown) around which the main rope 10 is wound, and moves between a plurality of floors.

  As shown in FIG. 3, a pair of guide rails 80 a and 80 b for guiding the elevator 20 to move up and down are fixed to the inner wall of the elevator hoistway 90. The pair of guide rails 80 a and 80 b are arranged so as to sandwich the car 20, and extend along the hoistway 90.

  As shown in FIG. 3, the car 20 has a car room 22 in a frame 21. The floor 23 of the cab 22 is fixed on the lower beam 24 of the frame 21. The lower beam 24 is formed in a substantially U-shaped cross section as shown in FIG. A transmission mechanism 50 to be described later is installed inside the lower beam 24, and a pair of braking mechanisms 30a and 30b to be described later are attached to the lower surface of the lower beam 24.

  Usually, an elevator is provided with an emergency stop device that decelerates and stops the car 20 when the car 20 moves up and down at an abnormal speed that exceeds a predetermined level for some reason (see Patent Documents 1 and 2). The emergency stop device includes a pair of braking mechanisms 30a and 30b, a speed regulating mechanism 40, and a transmission mechanism 50.

  As shown in FIG. 3, the pair of braking mechanisms 30 a and 30 b are installed in the vicinity of the pair of guide rails 80 a and 80 b, respectively, and are fixed to the lower surface of the lower beam 24. As shown in FIG. 5, each of the braking mechanisms 30 a and 30 b includes a pressing body 32, a plurality of rollers 35, a pair of wedge bodies 36, and a lift member in a support frame 31 fixed to the lower surface of the lower beam 24. 37.

  Explaining with the brake mechanism 30a as an example, the pressing body 32 has a pair of wedge receivers 33 and a biasing member as shown in FIG. The pair of wedge receivers 33 are arranged opposite to each other so as to sandwich the guide rail 80a in the support frame 31. The pair of wedge receivers 33 are formed with first inclined surfaces 33a that are inclined so as to approach the guide rails 80a as they go upward. In the present embodiment, the biasing member is a substantially U-shaped leaf spring 34. The leaf spring 34 is attached to the support frame 31. A pair of wedge receivers 33 are fixed inside the opposed portion 34a of the leaf spring 34, and the leaf spring 34 biases the pair of wedge receivers 33 in a direction to sandwich the guide rail 80a.

  The pair of wedge bodies 36 is installed between the guide rail 80a and the pair of wedge receivers 33 so as to be vertically movable. On the wedge receiver 33 side of the wedge body 36, a second inclined surface 36a that is inclined so as to approach the guide rail 80a as it goes upward is formed corresponding to the first inclined surface 33a. Further, a braking surface that is in surface contact with the guide rail 80a is formed on the guide rail 80a side of the wedge body 36. A plurality of rollers 35 are disposed between the wedge body 36 and the wedge receiver 33.

  The lift member 37 is fixed to the wedge body 36. The lift member 37 extends upward from the wedge body 36 and is connected to the transmission mechanism 50. The lift member 37 moves the pair of wedge bodies 36 relatively upward along the first inclined surfaces 33a of the pair of wedge receivers 33 when the car 20 moves up and down at an abnormal speed of a predetermined level or more, and guide rails It press-fits between 80a and a pair of wedge receivers 33. The car 20 is decelerated and stopped by the frictional force between the braking surface 36b of the pair of wedge bodies 36 and the guide rail 80a.

  The speed control mechanism 40 includes a governor rope 41, a governor 42, a governor tensioner 43, and a rotation lever 44.

  The annular governor rope 41 is wound around sheaves 45 a and 45 b installed at the upper and lower parts of the hoistway 90, and hangs down along the hoistway 90. A connecting portion 41 a is fixed to a portion of the governor rope 41 in the vicinity of the car 20. One end of the turning lever 44 is pivotally supported by the connecting portion 41 a by a pin 46. The other end of the turning lever 44 is fixed to a first rotating shaft 51 that is rotatably attached to the lower beam 24 of the car 20. Therefore, the governor rope 41 is interlocked with the raising and lowering of the car 20.

  The governor 42 is attached to a sheave 45 a installed at the upper part of the hoistway 90 and detects the speed of the governor rope 41. The governor 42 suppresses the movement of the governor rope 41 when the governor rope 41 moves at an abnormal speed greater than or equal to a predetermined value. At this time, the car 20 moves away from the connecting portion 41a of the governor rope 41 in order to continue to move up and down at an abnormal speed. Then, the rotation lever 44 rotates about the pin 46 and rotates the first rotation shaft 51.

  The governor tensioner 43 is attached to a sheave 45 b installed at the lower part of the hoistway 90 and applies a predetermined tension to the governor rope 41.

  The transmission mechanism 50 includes a first rotating shaft 51, a second rotating shaft 52, a first lift link 53, a second lift link 54, and a link rod 55. The 1st lift link 53, the 2nd lift link 54, and the link rod 55 are installed in the lower beam 24 formed in the cross-sectional substantially U shape.

  The first rotating shaft 51 is positioned above the braking mechanism 30 a and is rotatably supported by the lower beam 24. The first lift link 53 is formed in a substantially L-shaped plate shape. The first lift link 53 is pivotally supported by the first rotating shaft 51 at a substantially L-shaped corner, and rotates as the first rotating shaft 51 rotates. One end of the first lift link 53 is pivotally supported on the lift member 37 of the braking mechanism 30 a by a pin 56, and the other end of the first lift link 53 is pivotally supported on one end of the link rod 55 by a pin 57. .

  The second rotating shaft 52 is positioned above the braking mechanism 30b and is rotatably supported by the lower beam 24. The second lift link 54 is formed in a substantially L-shaped plate shape. The second lift link 54 is pivotally supported by the second rotary shaft 52 at a substantially L-shaped corner. One end of the second lift link 54 is pivotally supported on the lift member 37 of the braking mechanism 30b by a pin 58, and the other end of the second lift link 54 is pivotally supported on the other end of the link rod 55 by a pin 59. Yes.

  The operation of the emergency stop device for the elevator will be described with reference to FIG. 4 by taking as an example the case where the car 20 descending at an abnormal speed is decelerated and stopped.

  When the car 20 descends at an abnormal speed, the governor 42 suppresses the movement of the governor rope 41 as described above. Then, the rotation lever 44 is rotated counterclockwise around the pin 46, and the first rotation shaft 51 is rotated counterclockwise. Along with this, the first lift link 53 also rotates counterclockwise around the first rotating shaft 51, and moves the lift member 37 of the braking mechanism 30a relatively upward with respect to the car 20. As a result, the pair of wedge bodies 36 of the braking mechanism 30 a is press-fitted between the guide rail 80 a and the pair of wedge receivers 33.

  Further, when the first lift link 53 also rotates counterclockwise around the first rotation shaft 51, the link rod 55 pushes the second lift link 54. Then, the second lift link 54 rotates counterclockwise around the second rotation shaft 52, and the lift member 37 of the braking mechanism 30b is moved upward relative to the car 20. As a result, the pair of wedge bodies 36 of the braking mechanism 30 b are also press-fitted between the guide rail 80 b and the pair of wedge receivers 33.

  As described above, the elevator safety device disclosed in Patent Documents 1 and 2 causes the pair of braking mechanisms 30a and 30b to act simultaneously to decelerate and stop the car 20 that moves up and down at an abnormal speed.

JP 2010-37059 A JP 2010-37060 A

  The braking force of the elevator emergency stop device described above is normally set so as to decelerate at a predetermined deceleration on the assumption that the loading weight of the car 20 is maximum. Therefore, when there are few passengers and loads, the deceleration becomes too large compared to the case where the loaded weight is maximum.

  Therefore, an elevator safety device according to an embodiment of the present invention has been made to solve the above-described problems, and an object thereof is to change the braking force according to the loaded weight of the car.

  In order to solve the above-described problems, an elevator according to an embodiment of the present invention has a car frame that moves up and down a hoistway, a floor part of the car room of the car, and a load capacity in the car room. Accordingly, an elastic body that supports the floor portion so that the floor portion can be displaced up and down relatively with respect to the frame body, a guide rail that extends along the hoistway and guides the raising and lowering of the car, and the frame body A pressing body that is attached and disposed opposite to each other so as to sandwich the guide rail, is biased in a direction to sandwich the guide rail, and has a pair of first inclined surfaces that approach the guide rail as it goes upward And a braking surface opposed to the guide rail and a second inclined surface corresponding to the first inclined surface are formed between the guide rail and the pair of first inclined surfaces. The car is A pair of wedge bodies that are moved upward relative to the pressing body and are press-fitted between the guide rail and the first inclined surface when the elevator moves up and down at a speed greater than a predetermined speed; The amount of movement of the wedge body relative to the pressing body is limited, and the loading amount in the cab is increased so that the floor body is displaced downward relative to the frame body. And a lift stopper for releasing the restriction on the amount of movement of the pair of wedge bodies.

It is a schematic sectional drawing at the time of the action | operation of the emergency stop apparatus of the elevator which concerns on embodiment of this invention. It is a schematic sectional drawing for demonstrating an effect | action of the lift stopper of the emergency stop apparatus of the elevator which concerns on embodiment of this invention. It is a schematic longitudinal cross-sectional view of the conventional elevator. It is a schematic sectional drawing at the time of the action | operation of the conventional emergency stop apparatus of an elevator. FIG. 5 is a side view of FIG. 4. It is a perspective view of a wedge body and a lift rod of a conventional elevator safety device.

  An embodiment of an elevator according to the present invention will be described with reference to FIGS. 1 and 2. In addition, the same code | symbol is attached | subjected to the same part or similar part as the conventional elevator (refer FIG. 3 thru | or FIG. 5) mentioned above, and the overlapping description is abbreviate | omitted.

  In the elevator according to the present embodiment, the floor portion 23 of the cab 22 is placed on the lower beam 24 of the frame body 21 via an elastic body 25 as shown in FIG. For example, a coil spring is used for the elastic body 25. The elastic body 25 supports the floor portion 23 so that it can be displaced up and down relatively with respect to the frame body 21 in accordance with the load weight in the cab 22.

  Further, the elevator safety device according to the present embodiment includes a pair of lift stoppers 60a and 60b. The pair of lift stoppers 60a and 60b is an amount by which the pair of wedge bodies 36 moves upward relative to the pressing body 32 in accordance with the weight loaded on the car room 22 (hereinafter referred to as “lift amount”). It plays a role of limiting.

  In the present embodiment, the lift stoppers 60a and 60b are formed in a substantially Z-shaped plate shape, and a pin hole is formed in the approximate center. The pair of lift stoppers 60a and 60b are respectively disposed above the pair of braking mechanisms 30a and 30b, and are pivotally supported on the lower beam 24 by pins 61a and 61b.

  One ends of the lift stoppers 60 a and 60 b are in contact with the lower surface of the floor portion 23. As shown in FIG. 1, the other ends of the lift stoppers 60 a and 60 b abut against the upper end of the lift member 37 when the emergency stop device is operated, that is, when the wedge body 36 is lifted.

  Here, Fig.2 (a), (b) has shown the state before the action | operation of an emergency stop apparatus. As shown in FIG. 2A, when the load weight in the cab 22 is small, the lift amount of the wedge body 36 is limited to the distance d between the other end of the lift stopper 60a and the upper end of the lift member 37. Is done. When the loaded weight increases from the state of FIG. 2A, the lift stopper 60a rotates counterclockwise about the pin 61a as the floor portion 23 descends (arrow 100 in FIG. 2A). (Arrow 101 in FIG. 2A). Then, as shown in FIG. 2B, the distance d between the other end of the lift stopper 60a and the upper end of the lift member 37 is increased, and the restriction on the lift amount of the wedge body 36 is released.

  The elevator safety device according to the present embodiment includes lift stoppers 60a and 60b that limit the lift amount of the wedge body 36, and the lift amount of the wedge body 36 is limited as the load weight on the cab 22 increases. Opened. Therefore, when the load weight to the car room 22 is small, the braking force of the emergency stop device is low, and when the load weight to the car room 22 is large, the braking force of the emergency stop device increases. That is, in the elevator according to the present embodiment, the deceleration of the car 20 can be adjusted by changing the braking force of the emergency stop device according to the loaded weight of the car 20.

  The above embodiments are merely examples, and the present invention is not limited to these. For example, the lift stoppers 60a and 60b do not need to have a substantially Z-shaped plate shape, and may have a rod shape. The elastic body 25 that supports the floor portion 23 does not have to be a coil spring, and may be a leaf spring or a disc spring.

DESCRIPTION OF SYMBOLS 10 ... Main rope, 20 ... Riding car, 21 ... Frame body, 22 ... Car room, 23 ... Floor part, 24 ... Bottom beam, 25 ... Elastic body, 30 (30a, 30b) ... Braking mechanism, 31 ... Support frame, 32 ... Pressing body, 33 ... Wedge receiver, 33a ... First inclined surface, 34 ... Plate spring, 34a ... Plate spring, 35 ... Roller, 36 ... Wedge body, 36a ... Second inclined surface, 36b ... Brake surface 37 ... Lift member, 40 ... Speed control mechanism, 41 ... Governor rope, 41a ... Connecting portion, 42 ... Governor, 43 ... Governor tensioner, 44 ... Rotating lever, 45a, 45b ... Sheave, 46 ... Pin, 50 ... Transmission mechanism , 51 ... 1st rotation shaft, 52 ... 2nd rotation shaft, 53 ... 1st lift link, 54 ... 2nd lift link, 55 ... Link rod, 56-59 ... Pin, 60 (60a, 60b) ... Lift stopper, 61a, 61b ... pins, 0 (80a, 80b) ... guide rail, 90 ... hoistway

Claims (2)

A frame of a car that goes up and down the hoistway;
The floor of the cab room of the car,
An elastic body that supports the floor portion so as to be vertically displaceable relative to the frame body in accordance with a load amount to the cab
A guide rail that extends along the hoistway and guides the raising and lowering of the car;
A pair of first inclined surfaces that are attached to the frame body and are opposed to each other so as to sandwich the guide rail, are biased in a direction to sandwich the guide rail, and approach the guide rail as they go upward. A pressed body,
A braking surface disposed between the guide rail and the pair of first inclined surfaces so as to be vertically movable, a braking surface facing the guide rail and a second inclined surface corresponding to the first inclined surface are formed, A pair of wedge bodies that are moved upward relative to the pressing body and press-fitted between the guide rail and the first inclined surface when the car is moved up and down at a speed greater than a predetermined speed; ,
The amount of movement of the pair of wedge bodies relative to the pressing body is limited, and the load on the cab is increased so that the floor body is displaced downward relative to the frame body. A lift stopper that releases the restriction on the amount of movement of the pair of wedge bodies,
An elevator characterized by comprising:   The lift stopper is pivotally supported by the frame body, and rotates at one end abutting against the floor, and at the other end abutting against the pair of wedge bodies. The elevator according to claim 1, wherein the moving amount is limited.

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