CN113800360A

CN113800360A - Elevator cage

Info

Publication number: CN113800360A
Application number: CN202110582928.5A
Authority: CN
Inventors: 大菅麻里; 仮屋智贵; 岛田胜博
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2020-06-12
Filing date: 2021-05-27
Publication date: 2021-12-17
Anticipated expiration: 2041-05-27
Also published as: JP2021195210A; CN113800360B; JP7449782B2

Abstract

The invention aims to provide an elevator car which can realize sharing of an emergency stop device and restrain increase of manufacturing cost. The pull-up device (8) is composed of a pull-up mechanism part (60) and a mounting bracket (70). The pull-up mechanism (60) is provided with: a lever (62) that is rotatable; a rod holding body (63) which holds the rod; and a grip section (64) connected to the emergency stop device (7). The mounting bracket (70) is provided with: a bottom plate (71) fixed to the upper surface of the lever holding body (63); a front plate (72) rising upward from the bottom plate (71); a rear plate (73) that rises upward from the bottom plate (71), faces the lower beam (22), and is fixed to the lower beam (22); a side plate (74) which rises upward from the bottom plate (71) and is positioned on the outer side of the car (3); a reinforcement member (75) that connects the front plate (72) and the rear plate (73); and a stopper (76) that protrudes outward from the side plate (74) and limits the upward movement of the lever (62).

Description

Elevator cage

Technical Field

The present invention relates to an elevator car.

Background

The elevator is raised and lowered along the guide rails. An emergency stop device for stopping the car in an emergency is arranged on the elevator. In order to operate the emergency stop device, a rope for a speed governor connected to a car in an elevator is wound around the speed governor. When the descending speed of the car exceeds a predetermined speed, the governor rope is restrained by the governor, and an emergency stop device provided in the car operates to stop the car. The emergency stop device is arranged on the lower beam of the car frame. As such a technique, for example, a technique described in patent document 1 is proposed.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-13924

The emergency stop device provided in the car is manufactured in accordance with the specification of each car because the emergency stop device has different strength and structure required depending on the size of the car and the like. Therefore, there is a problem that the emergency stop device cannot be shared and the manufacturing cost increases. In the technique described in patent document 1, a specific configuration for achieving sharing of the emergency stop device is not considered.

Disclosure of Invention

Problems to be solved by the invention

An object of the present invention is to solve the above-described problems and to provide an elevator car that can share an emergency stop device and suppress an increase in manufacturing cost.

Means for solving the problems

In order to achieve the above object, the present invention is an elevator car provided with: an upper beam disposed at the upper portion; a pair of vertical frames, each of which has an upper end connected to both ends of the upper beam in the longitudinal direction; and a lower beam disposed between lower ends of the pair of vertical frames, and both ends of the lower beam are connected to the lower ends of the pair of vertical frames, wherein a car room is disposed in a portion of the elevator car surrounded by the upper beam, the pair of vertical frames, and the lower beam, and the elevator car includes: an emergency stop device for emergency stopping the car; and a pull-up device that is fixed to the lower beam and pulls up a brake member of the emergency stop device, the pull-up device being configured by a pull-up mechanism portion and a mounting bracket, the pull-up mechanism portion including: a lever that can rotate about a rotation axis; a rod holding body for holding the rod; and a grip portion connected to the emergency stop device, wherein the mounting bracket includes: a bottom plate fixed to an upper surface of the lever holder; a front plate rising upward from the bottom plate; a rear plate rising upward from the bottom plate, facing the lower beam, and fixed to the lower beam; a side plate that rises upward from the bottom plate and is positioned on an outer side of the car; a reinforcement member disposed so as to connect the front plate and the rear plate; and a stopper protruding outward from the side plate and restricting upward movement of the lever.

Effects of the invention

According to the present invention, it is possible to provide an elevator car in which an emergency stop device is shared and an increase in manufacturing cost is suppressed.

Drawings

Fig. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment of the present invention.

Fig. 2 is an enlarged perspective view of the car shown in fig. 1.

Fig. 3 is a perspective view showing only the car frame shown in fig. 2.

Fig. 4 is a sectional view of the emergency stop device.

Fig. 5 is a perspective view showing the shape of the upper pulling plate 50.

Fig. 6 is a perspective view of the car frame 20 viewed from below.

Fig. 7 is a perspective view of the normal pull-up device 8.

Fig. 8 is a perspective view of the drawing device 8 in the drawing operation.

Fig. 9 is a perspective view of the carriage of the pull-up device 8.

Description of reference numerals:

1 hoisting machine, 2 main hoisting cable, 3 car, 4A car lower pulley, 4B car lower pulley, 5 counterweight, 6 pulley, 7 emergency stop device, 8 hoisting device, 10 governor, 11a upper pulley, 11B lower pulley, 12 governor hoisting cable, 13 connecting member, 20 car frame, 21 upper beam, 22 lower beam, 22A loading part, 22B loading part, 23A vertical frame, 23B vertical frame, 24 connecting member, 25A floor lower side beam, 25B floor lower side beam, 26A pulley bracket, 26B pulley bracket, 27 hoisting cable guide, 30 car room, 32 top plate, 33 floor, 40 casing, 41 guide rail, 42 support body, 43 friction member, 44 brake member, 45 guide member, 46 spring, 47 roller unit, 48 guide plate, 49 base, 50 hoisting plate, 51 hoisting rod, 52 bottom surface part, 53 vertical surface part, 54 guide rail groove, 60 hoisting mechanism part, 61 rotation axis, 62 rod, 63 rod holder, 64 holding part, 65 bearing part, 70 mounting bracket, 71 bottom plate, 72 front plate, 73 back plate, 74 side plate, 75 reinforcing member, 76 stopper.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components are denoted by the same reference numerals, and the same description will not be repeated.

The various components of the present invention do not necessarily have to be individually and independently present, and it is permissible for one component to be constituted by a plurality of members, for a plurality of components to be constituted by one member, for a component to be a part of another component, for a part of a component to overlap with a part of another component, or the like.

Fig. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment of the present invention. In fig. 1, an elevator apparatus is installed in a hoistway not shown. One end of a main rope 2 wound around the hoist 1 is suspended by passing through a pair of left and right

lower car pulleys

4A and 4B provided at a lower portion of the car 3, and then fixed at a position above the hoistway. The other end of the main rope 2 is suspended by passing through a pulley 6 of the counterweight 5 and then fixed to the upper part of the hoistway. The hoisting machine 1 is driven to rotate by the elevator apparatus, so that the car 3 provided on one side of the main hoisting rope and the counterweight provided on the other side of the main hoisting rope move in the vertical direction in the hoistway. The lower part of the car 3 is provided with an emergency stop device 7 for emergency stopping the car 3 when the descending speed of the car 3 exceeds a predetermined speed, and a pull-up device 8 for pulling up a brake member of the emergency stop device 7.

Further, a governor 10 is provided in the lift passage. The governor 10 includes an upper pulley 11a provided on an upper portion of the ascending/descending path, a lower pulley 11b provided on a lower portion of the ascending/descending path, and a governor rope 12 wound around the upper pulley 11a and the lower pulley 11 b.

A connecting member 13 is connected to the car 3, and the connecting member 13 is connected to a governor rope 12. With such a configuration, the governor rope 12 moves as the car 3 moves up and down, and the governor 10 detects the speed of the car 3 moving up and down.

Although not shown in detail, the governor 10 includes an upper pulley 11a around which a governor rope 12 is wound, a pair of vibrators that rotate by centrifugal force of the upper pulley 11a, an adjustment spring having an urging force against a rotating force of the vibrators, and a rope holding mechanism that operates in accordance with a rotational position of the vibrators. When the elevating speed of the car 3 exceeds a predetermined value, for example, the rotational speed of the upper pulley 11a increases and the centrifugal force increases to rotate the oscillator, and the rope holding mechanism is operated to fix the governor rope 12. In this state, when the car 3 descends, the connection member 13 is pulled up to operate the safety device 7.

The structure of the safety device 7 will be described. Fig. 4 is a sectional view of the emergency stop device. The safety device 7 is configured to be bilaterally symmetrical with respect to the guide rail 41, and a pair of braking members 44 are disposed with the guide rail 41 as a boundary. The stopper 44 is disposed substantially parallel to the guide rail 41 with a slight gap so as to be able to pinch the guide rail 41 from both sides. The braking member 44 is composed of a support 42 and a friction member 43 fixed to a surface of the guide rail 41.

The back surface of the stopper 44 is a wedge-shaped smooth inclined surface that narrows upward. The pair of guide members 45 has inclined surfaces on the inner side, which are parallel to the inclined surfaces of the stopper 44 and inclined so as to expand outward, and the outer sides thereof are vertical surfaces. The vertical surface of the guide member 45 is sandwiched by U-shaped brake springs 46. The brake spring 46 has a U-shape in which a side thereof facing the guide rail 41 is open, and elastically biases the guide member 45 toward the guide rail 41 by a reaction force generated by the outward expansion. A roller unit 47 is provided between the stopper 44 and the guide member 45 to make the movement of each other smooth. Guide plates 48 are fixed to both side surfaces of the guide member 45 to guide the movement of the stopper 44.

The stopper 44, the guide member 45, the stopper spring 46, the roller unit 47, and the guide plate 48 are housed in the housing 40. Further, in the brake 44, a plate-like friction member 43 is provided on a surface of the support body 42 made of cast iron facing the guide rail 41. The friction material 43 is made of, for example, a heat-resistant metal alloy made of a Ni base or a Co base, resists frictional heat, exerts a stable braking force even at a high temperature, and is inexpensive compared to a ceramic material.

A pull-up plate 50 for activating the safety device 7 is provided on one side surface of the stopper 44. The upper pulling plate 50 is made of a metal plate, and the upper pulling plate 50 is connected to the upper pulling device 8 by an upper pulling rod 51. The pull-up plate 50 is not in an integral fixed relationship with the stopper 44, and the pull-up plate 50 and the stopper 44 are movable relative to each other. The stopper 44 can be moved up and down by pulling up the plate 50. The up-drawing device 8 operates to pull up the brake member 44 of the emergency stop device 7 to stop the car 3.

A base 49 is fixed to the bottom surface of the stopper 44, and is configured such that when the pulling-up plate 50 is pulled up, the base 49 is pushed up by the bottom surface portion 52 of the pulling-up plate 50, and the stopper 44 is also pushed up together. The bottom surface of the base 49 has stopper-side inclined surfaces inclined downward as it goes away from the guide rail 41, and the stopper-side inclined surfaces of the base 49 of the pair of stoppers 44 are inclined in a direction of becoming substantially "ハ" across the guide rail 41.

Similarly, the bottom surface portion 52 of the pull-up plate 50 also has a pull-up-side inclined surface that is inclined downward as it moves away from the guide rail 41 so as to be parallel to the stopper-side inclined surface of the chassis 49, and the pull-up-side inclined surface of the bottom surface portion 52 of the pull-up plate 50 also inclines in a direction that is substantially "ハ" across the guide rail 41, corresponding to the chassis 49 of the pair of stoppers 44.

Fig. 5 is a perspective view showing the shape of the upper pulling plate 50. The top board 50 has a substantially L-shaped side cross section, and the top board 50 includes a bottom surface portion 52 and a vertical surface portion 53. The pull-up rod 51 is fixed to the vertical surface portion 53, and a rail groove 54 is formed in a portion of the bottom surface portion 52 corresponding to a position where the rail 41 exists. As described above, the bottom surface portion 52 is formed into a pull-up inclined surface having a substantially "ハ" shape with the rail groove 54 interposed therebetween. The vertical surface portion 53 and the bottom surface portion 52 may be formed by bending, or may be formed as separate members and then integrated by welding or the like. The structure of the pulling-up device 8 will be described later.

Next, the structure of the car 3 will be explained. Fig. 2 is an enlarged perspective view of the car 3 shown in fig. 1.

In fig. 2, the car 3 is configured by a car frame 20 and a car room 30 formed inside the car frame 20.

The car frame 20 includes an upper beam 21 disposed above the car room 30, a lower beam 22 disposed below the car room 30, and a pair of

vertical frames

23A and 23B that connect end portions of the upper beam 21 and the lower beam 22 to each other at side portions of the car room 30. The cage room 30 is surrounded by the upper beam 21, the lower beam 22, and a pair of

vertical frames

23A, 23B.

The cage 30 is composed of side walls covering the periphery, a ceiling 32 disposed at the top, and a floor 33 disposed at the bottom.

Fig. 3 is a perspective view showing a state in which the cage 30 is removed from fig. 2. In fig. 3, the lower beam 22 is formed of two U-shaped members, and the U-shaped openings are arranged to face each other with a gap therebetween. The two members are fastened and fixed by bolts (not shown) via the fastening members 24. The surface positioned above the lower beam 22 is provided with

placement portions

22A and 22B.

A pair of under

floor side members

25A, 25B are placed on the

placement portions

22A, 22B of the lower beam 22 and fixed by bolts (not shown). The floor 33 of the car room 30 is placed on the

placement portions

22A and 22B. The floor

lower side members

25A, 25B are disposed substantially horizontally on the inner sides of the upright frames 23A, 23B facing each other, extending in the front-rear direction orthogonal to the left-right direction (longitudinal direction) of the lower member 22.

Pulley brackets

26A, 26B are fixed to the lower surfaces of the

underfloor side members

25A, 25B by bolts (not shown). The

pulley brackets

26A and 26B rotatably support the car

lower pulleys

4A and 4B around which the main rope 2 is wound. A sling guide 27 fixed by a bolt (not shown) is fixed below the

pulley brackets

26A, 26B so as to connect the

pulley brackets

26A, 26B to each other. The rope guide 27 protects the main ropes 2 wound around the car

lower pulleys

4A and 4B from being caught by foreign matters.

Next, the structure of the drawing-up device 8 will be explained. Fig. 6 is a perspective view of the car frame 20 as viewed from below, fig. 7 is a perspective view of the normally-used pulling-up device 8, fig. 8 is a perspective view of the pulling-up device 8 during a pulling-up operation, and fig. 9 is a perspective view of a bracket of the pulling-up device 8.

The pulling-up device 8 is made of metal and is fixed to the lower beam 22. In the present embodiment, the pulling-up device 8 is fixed to the side surface of the lower beam 22 and is disposed below the floor lower side beam 25B. The upper pulling device 8 is disposed on the lower beam 22 so as to face the car lower pulley 4B. This enables effective use of the space below the car 3. The drawing-up device 8 is composed of a drawing-up mechanism portion 60 and a mounting bracket 70.

The pull-up mechanism portion 60 includes: a lever 62 that can rotate around the rotation shaft 61; a rod holding body 63 for holding the rod 62; and a grip 64 connected to the governor rope 12 via a connecting member 13 at an upper side thereof and connected to the pull-up rod 51 of the emergency stop device 7 at a lower side thereof. The surface of the lever holding body 63 facing the lower beam 22 is fixed to the lower beam via bolts. The rod holding member 63 further includes a receiving portion 65 for receiving the downward movement of the rod 62.

The mounting bracket 70 includes: a bottom plate 71; a front plate 72 rising upward from the bottom plate 71; a rear plate 73 rising upward from the bottom plate 71 and facing the lower beam 22; a side plate 74 rising upward from the bottom plate 71 and located on the outer side of the car 3; and a reinforcing member 75 disposed so as to connect the front plate 72 and the rear plate 73. The rear plate 73 of the mounting bracket 70 is fixed to the side surface of the lower beam 22 via bolts. The bottom plate 71 of the attachment bracket 70 is fixed via the upper surface of the lever holding body 63. Thereby, the attachment strength of the lever holding body 63 to the lower beam 22 is improved. Further, since the reinforcing member 75 is provided in the mounting bracket 70, the strength of the mounting bracket 70 itself is increased, and the strength of the attachment of the lever holding body 63 to the lower beam 22 is further increased. The side plate 74 of the mounting bracket 70 includes a stopper 76 protruding outward. The stopper 76 prevents the rod 62 from moving upward.

Next, the operation of the lever 62 will be described with reference to fig. 7 and 8. During normal operation of the elevator, the governor rope 12 moves along with the up-and-down movement of the car 3 by the connecting member 13 connecting the car 3 and the governor rope 12, and the governor 10 detects the up-and-down speed of the car 3. At this time, the lever 62 is placed on the receiving portion 65 as shown in fig. 7.

When the elevating speed of the car 3 exceeds a predetermined value, the governor rope 12 is fixed, the rod 62 is pulled up via the connecting member 13, and the grip 64 side moves upward around the rotary shaft 61 as shown in fig. 8. The pulled-up rod 62 abuts against the stopper 76 and prevents upward movement.

In accordance with the pull-up operation of the lever 62, the pull-up rod 51 connected to the grip portion 64 of the lever 62 is pulled up, the bottom surface portion 52 of the pull-up plate 50 pushes up the stopper 44, the friction material 43 of the stopper 44 comes into contact with the guide rail 41, and the emergency stop device 7 generates a braking force. The car 3 is brought to an emergency stop by the braking force of the emergency stop device 7.

The mounting bracket 70 receives stress via the rod 62 and the stopper 76 in accordance with the pull-up operation of the rod 62. Since this stress varies depending on the size, speed, and lift of the car 3, the mounting bracket 70 needs to be prepared in accordance with the specification of the elevator. In the present embodiment, since the reinforcing member 75 is provided in the mounting bracket 70, the mounting bracket 70 can be prevented from being deformed, and the mounting bracket 70 can be shared regardless of the specification of the elevator.

The present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail to facilitate understanding of the present invention, and are not limited to having all of the described configurations.

Claims

1. An elevator car configured with: an upper beam disposed at the upper portion; a pair of vertical frames, each of which has an upper end connected to both ends of the upper beam in the longitudinal direction; and a lower beam disposed between lower ends of the pair of vertical frames, both ends of the lower beam being connected to the lower ends of the pair of vertical frames, wherein a car room is disposed in a portion of the elevator car surrounded by the upper beam, the pair of vertical frames, and the lower beam,

the car of the elevator is characterized in that,

the car of elevator possesses:

an emergency stop device for emergency stopping the car; and

a pull-up device fixed to the lower beam and pulling up a stopper of the emergency stop device,

the upward pulling device consists of an upward pulling mechanism part and a mounting bracket,

the pull-up mechanism includes: a lever that can rotate about a rotation axis; a rod holding body for holding the rod; and a grip portion connected to the emergency stop device,

the mounting bracket includes: a bottom plate fixed to an upper surface of the lever holder; a front plate rising upward from the bottom plate; a rear plate rising upward from the bottom plate, facing the lower beam, and fixed to the lower beam; a side plate that rises upward from the bottom plate and is positioned on an outer side of the car; a reinforcement member disposed so as to connect the front plate and the rear plate; and a stopper protruding outward from the side plate and restricting upward movement of the lever.

2. Elevator car according to claim 1,

the rod holder includes a receiving portion for receiving downward movement of the rod.

3. Elevator car according to claim 1,

the upper pulling device is fixed on the side surface of the lower beam.

4. Elevator car according to claim 3,

the car of the elevator is provided with a floor lower side beam which extends in a direction orthogonal to the longitudinal direction of the lower beam and is placed on the lower beam, and the pull-up device is disposed below the floor lower side beam.

5. Elevator car according to claim 4,

the lower surface of the under-floor side member is provided with a car lower pulley around which a main rope is wound, and the upper pulling device is disposed on the lower member so as to face the car lower pulley.

6. Elevator car according to claim 1,

the emergency stop device is connected to a lower portion of the grip portion, and the governor rope is connected to an upper portion of the grip portion via a connecting member.