JP4158380B2 - Elevator car - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator car having a structure in which a car is suspended by a main rope, and more particularly to weight reduction of a car frame.
[0002]
[Prior art]
5 and 6 are views showing a main structure of a side fork type elevator car which is an example of a conventional elevator car, FIG. 5 is a front view, and FIG. 6 is a cross-sectional view taken along line AA of FIG.
In the figure, 1 is a pair of guide rails installed in the vertical direction of the hoistway, 2 is a pair of eaves frames, and the upper ends thereof are connected by an upper frame 3. Reference numeral 4 denotes a pair of car floor support beams fixed to the cage frame 2, and one end portions thereof are connected by a connecting member 5. Reference numeral 6 denotes a receiving frame fixed to the car floor support beam 4, and 7 denotes a lower frame. A holding frame 8 holds the shaft 9 and is fixed to the receiving frame 6 and the lower frame 7. Reference numeral 10 denotes a support frame in which one side is pivotally attached to the holding frame 8 by a shaft 9, the middle is supported on the lower surface of the receiving frame 6 with the holding frame 8 in between, and the main rope 11 is connected to the other side.
[0003]
Reference numeral 20 denotes a first spring provided between the holding frame 8 and the support frame 10, 21 denotes a second spring provided coaxially with the first spring 20, and 22 denotes a bracket provided above the second spring 21. Reference numeral 23 denotes an operating shaft of an emergency stop device (not shown), and a bolt 24 penetrating a hole formed in the bracket 22 is provided. As a result, the rise of the bracket 22 by the second spring 21 is restricted. A lever 25 is fixed to each end of the shaft 23. 26 is a car floor attached to the car floor support beam 4, and 27 is a car room.
[0004]
In the cage of this configuration, when the main rope 11 is loosened, the first spring 20 causes the support frame 10 to rotate about the shaft 9 in the counterclockwise direction of FIG. 5, the second spring 21 is compressed, and the bracket 22 is As a result, the switch (not shown) is operated to stop the elevator. Further, as the bracket 22 descends, the shaft 23 rotates clockwise and the lever 25 also rotates clockwise, thereby operating the emergency stop device and mechanically stopping the elevator.
[0005]
[Problems to be solved by the invention]
In the elevator car having the above-described configuration, since many members such as the receiving frame 6, the lower frame 7, and the support frame 10 need to be strength members for supporting the weight of the car, the weight of the entire car frame is heavy. For this reason, the range that can be pre-assembled at the factory is limited in consideration of bringing the car frame into the field. In other words, since the number of parts of the car frame increases, there is a problem that it takes time for installation and adjustment on site.
[0006]
[Means for Solving the Problems]
The present invention relates to an elevator car configured to suspend a car provided with a main support frame having an inverted cross-sectional hat shape by a support frame connected to a rope socket provided at an end of the main rope. An emergency stop device that mechanically stops the elevator between the support frame and the shaft is provided so as to be rotatable with respect to the car body including the longitudinal axis of the main support frame. A shaft to be operated is provided, and the support frame, the shaft, and the shaft are respectively disposed outside the central recessed portion of the main support frame having a cross-section reverse hat shape, and the rope socket is the reverse hat-shaped central bottom portion of the main support frame. The support frame is normally supported in contact with the bottom surface of the bottom of the inverted hat shape of the main support frame. When the main rope is loosened, the support frame is rotated about the axis by the spring, the weight of the support frame, and the like, and is separated from the bottom surface of the bottom of the inverted hat shape of the main support frame. The switch for stopping the operation is operated, and the shaft is moved to operate the emergency stop device .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 is a front view of the main part of the car frame, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. 2, and FIG.
In the figure, 30 is a pair of U-shaped guide rails, 40 is a main support frame fixed to the pair of car floor support beams 4, 41 is a lower frame, and a piece of hinge 42 is fixed. Reference numeral 43 denotes a support frame. One side is fixed to the other piece of the hinge 41, and the other side is arranged so as to contact the lower surface of the main support frame 40. A rope socket 44 is fixed to the end of the main rope 11 and penetrates the main support frame 40 and the support frame 43 and is connected to the support frame 43 by a spring. Reference numeral 45 denotes a compression spring provided between the main support frame 40 and the support frame 43.
[0008]
50 is a shaft attached to the support frame 43, 51 is a safety lever pivotally attached to the collar frame 2, one piece is in contact with the lower surface of the shaft 50, and the other piece holds the roller 52. When the roller 52 is raised and pressed against the guide rail 30, the emergency stop device 53 is activated to mechanically stop the elevator. Reference numeral 54 denotes a switch that detects looseness of the main rope 11 and is fixed to the main support frame 40. Reference numeral 55 denotes a plate fixed to the support frame 43. The same reference numerals as those in FIGS. 5 and 6 denote the same components.
[0009]
In the present embodiment, when the main rope 11 is loosened, the support frame 43 rotates counterclockwise in FIG. As a result, the support frame 43 is lowered in FIG. 4 and the switch 54 is operated by the plate 55 to stop the elevator.
Further, the shaft 50 moves in the same direction as the support frame 43 rotates. When the shaft 50 moves, the safety lever 51 rotates in the clockwise direction in FIG. 1 and pushes up the roller 52 to operate the emergency stop device 53 to mechanically stop the elevator.
[0010]
As described above, in the present embodiment, the main support frame 40 is used in place of the receiving frame 6 that has been conventionally used, and the weight of the car hanging on the main rope 11 is supported by the main support frame 40. Therefore, since the load is not applied to the support frame 43 and the hinge 42 at normal time, the support frame 43 does not need to be a strength member. Moreover, since the lower frame 41 only needs to support the hinge 42, it does not need to be a strength member. Therefore, since the strength member can be reduced as compared with the conventional case, the weight of the car frame can be reduced and the cost can be reduced.
The weight reduction of the car frame makes it easy to carry the car frame to the site. For this reason, many parts can be assembled in advance at the factory, so that there is an effect that installation and adjustment at the site becomes easy.
[0011]
Further, when the main rope 11 is loosened, the support frame 43 is separated from the main support frame 40 to operate the switch 54 and the emergency stop device 53. Therefore, the shaft 50 is only slightly loaded when the main rope 11 is loosened. Therefore, there is an advantage that neither the shaft 50 nor the hinge 42 requires strength. Furthermore, since the shaft 50 can operate the emergency stop device 53 only by lowering as the support frame 43 rotates, the structure can be simplified as compared with the prior art.
[0012]
In the above-described embodiment, a so-called early emergency stop device using the roller 52 is used as the emergency stop device 53. However, an immediate emergency stop device that raises the wedge may be used. Further, the configuration for operating the switch 54 is not limited to the plate 55, and other configurations may be used as long as they can be interlocked with the operation of the support frame 43. Further, when the main rope 11 is loosened, the support frame 43 does not have to be completely separated from the main support frame 40. If the switch 54 or the like can be operated, only a part of the support frame 43 may be separated.
[0013]
【The invention's effect】
As described above, according to the present invention, the car frame can be reduced in weight as compared with the prior art. Furthermore, it is possible to realize easy installation, cost reduction, simplification of the operation mechanism of the emergency stop device, and the like.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention, and is a front view of a main part of a car frame.
2 is a plan view of FIG. 1. FIG.
3 is a cross-sectional view taken along the line BB in FIG.
4 is a cross-sectional view taken along the line CC of FIG. 3;
FIG. 5 is a front view showing a main structure of a conventional elevator car.
6 is a cross-sectional view taken along the line AA in FIG.
[Explanation of symbols]
1,30 Guide rail 2 Frame 4 Car floor support beam 7, 41 Lower frame 10, 43 Support frame 11 Main rope 23, 50 Shaft 25, 51 Lever 40 Main support frame 44 Rope socket 53 Emergency stop device 54 Switch

Claims (1)

In an elevator car having a configuration in which a car is provided with a main support frame having a reverse hat cross section by a support frame to which a rope socket provided at an end of the main rope is connected.
The support frame, with respect to the car body including the main support frame, and the longitudinal direction of the main support frame in the axial, the between is provided rotatably, and the support frame and the shaft A shaft for operating an emergency stop device that mechanically stops the elevator is provided, and the support frame, the shaft, and the shaft are each disposed outside a central recess having a cross-section reverse hat shape of the main support frame, and the rope socket Is connected to the support frame through the inverted hat center bottom of the main support frame , so that the support frame is always supported in contact with the bottom surface of the reverse hat bottom of the main support frame. When the main rope is loosened, the support frame is rotated about the shaft and separated from the bottom surface of the bottom of the inverted hat of the main support frame , and the elevator is stopped by the rotation of the support frame. Switch As well as dynamic, the elevator car, characterized in that the shaft moves the safety device is configured to operate.

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