JP2005001800A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device with a safety device having sufficient braking force even against an increased rated speed of an elevator to have high safety even in a high-rise building. <P>SOLUTION: In a press-contact guide part 14 of a guide rail vertically guiding a car in a hoistway, a face to be brought into press contact with a shoe brought into press contact with the press-contact guide part to stop the car is provided with a plurality of grooves. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator apparatus, and more particularly to an improvement of the safety apparatus.
[0002]
[Prior art]
Elevators move passengers up and down to carry passengers to different floors. However, it is necessary for safety to stop the car, and some safety device is usually provided.
[0003]
An example of an elevator apparatus provided with a conventional safety device is shown in FIG. In the drawing, an elevator car 81 is hung by a main rope 82, and is lifted and lowered in a hoistway 84 by a hoisting machine 83, and its raising and lowering is guided by a pair of guide rails 85 provided in the hoistway 84. Is done.
[0004]
In order to stop the car 81 for safety, an emergency stop device 86 is provided on the counterweight 86 provided at the other end of the car or the main rope corresponding to the guide rail 85. The example of FIG. 8 is an example in which an emergency stop device 86 is provided only in the car 81 as a safety device.
[0005]
The emergency stop device 86 operates when the speed of the car 81 exceeds the rated speed due to factors such as the cutting of the main rope 82 and the rotational speed of the hoisting machine 83 becoming abnormally high. Grab and mechanically stop the car 81. That is, when the speed governor 87 installed in the machine room detects that the speed of the elevator has increased, a rope grip (not shown) incorporated in the speed governor 87 is actuated and wound around the speed governor 87. The governor rope 88 is gripped. As a result, the emergency stop device 86 is actuated via the safety link 89 attached to the car 81. When the emergency stop device 86 is activated, the shoe 90 sandwiches the guide rail 85, and the car 81 is stopped by the friction force.
[0006]
By the way, with the recent increase in the height of building, the distance that the elevator car moves in the vertical direction has increased, and there is a demand for higher speed. Therefore, although the rated speed of the elevator is increased, the required braking force increases as the speed increases.
[0007]
However, in an elevator provided with a safety device as described above, frictional heat and abrasion powder are generated between the shoe 90 and the guide rail 85 during operation of the safety device 86, and the frictional force is reduced, so that the shoe There is a problem that a necessary braking force cannot be obtained only by changing the material and shape of 90.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the problems of the conventional elevator safety devices as described above, and has sufficient braking force even when the rated speed of the elevator is increased. Therefore, the safety is high even in high-rise building. An object is to provide an elevator apparatus having the apparatus.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to claim 1 of the present invention, an elevator car, a guide rail for guiding the car vertically in the elevator hoistway, and the car at a predetermined speed. An elevator apparatus comprising a shoe that is brought into pressure contact with the pressure guide portion of the guide rail to stop the car when the guide rail has a surface that is in pressure contact with the shoe. An elevator apparatus having a plurality of recesses is provided.
[0010]
According to claim 2 of the present invention, the elevator car, a guide rail for guiding the car vertically in the elevator hoistway, and the guide rail when the car exceeds a predetermined speed An elevator apparatus comprising a shoe that is brought into pressure contact with the pressure contact guide portion to stop the car, wherein the pressure contact guide portion of the guide rail has a plurality of grooves on a surface that is in pressure contact with the shoe. The elevator apparatus characterized by this is provided.
[0011]
According to a third aspect of the present invention, the groove provided in the pressure-contact guide portion has an inverted C shape, a C shape, a mesh shape, a W shape, and an inverted shape with respect to the length direction of the guide rail. The elevator apparatus according to claim 2, wherein the elevator apparatus has either a square shape or a square shape.
[0012]
According to claim 4 of the present invention, the elevator car, the guide rail for guiding the car vertically in the elevator hoistway, and the guide rail when the car exceeds a predetermined speed An elevator apparatus comprising a shoe that is brought into pressure contact with the pressure contact guide portion to stop the car, wherein the pressure contact guide portion of the guide rail has a plurality of holes on the surface that is in pressure contact with the shoe. The elevator apparatus characterized by this is provided.
[0013]
According to claim 5 of the present invention, the elevator car, the guide rail for guiding the car vertically in the elevator hoistway, and the guide rail when the car exceeds a predetermined speed An elevator apparatus comprising a shoe that is brought into pressure contact with the pressure contact guide portion to stop the car, wherein the pressure contact guide portion of the guide rail has a plurality of grooves and a plurality of holes on a surface that is in pressure contact with the shoe. There is provided an elevator apparatus characterized by comprising.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the structure of a guide rail used in one embodiment of the present invention. The guide rail 10 includes a base portion 11 and a pressure contact guide portion 14 that is provided integrally with the base portion 11 and has a plurality of grooves 13 in pressure contact surfaces 12a and 12b that are pressed against a shoe (not shown). The said groove | channel 13 has a predetermined angle with respect to the length direction of a guide rail, forms the reverse C shape, and the adjacent groove | channel of the up-down direction is provided in parallel.
[0015]
FIG. 2 is a view showing the relationship between the pressure-contact guide portion of the guide rail and the car guide mechanism for guiding the car. Normally, the car guide mechanisms 21a, 21b, and 21c are in contact with the pressure contact guide portion 14 of the guide rail 10 to guide the car.
[0016]
Reference numerals 22a and 22b denote shoes that are pressed against the pressure contact surfaces 12a and 12b of the pressure contact guide part 14, and the pressure contact guide part 14 is only in the pressure contact area (A) (working area) that is pressure contacted with the shoes 22a and 22b as described above. Is provided with a groove.
[0017]
As described above, by removing the guide area (N) of the car guide mechanisms 21a, 21b, and 21c from the pressure contact area (A) where the groove is provided, vibration does not propagate to the car due to the groove 13. The ride comfort is not impaired while the car is moving up and down.
[0018]
As shown in FIG. 1, when a groove is provided in a portion where the shoes 22a and 22b of the pressure guide portion 14 of the guide rail are pressed against each other, the frictional force is large and wear powder generated at this time enters the groove. The powder will be discharged out of the contact surface. In addition, since the frictional heat generated when the shoe contacts the pressure contact portion of the guide rail is also radiated by the groove, it is possible to prevent the shoe from being deformed or altered by the frictional heat. As described above, the use of the guide rail shown in FIG. 1 has an advantage of preventing a reduction in braking efficiency of the safety device.
[0019]
Next, the manufacturing method of such a guide rail is demonstrated using FIG.
[0020]
The guide rail 10 used in an elevator is ground and adjusted in order to reduce surface roughness and distortion as much as possible in order to reduce the propagation of vibrations through the car guide mechanism and improve the riding comfort of the car. . The following processing is performed before or after the grinding process.
[0021]
That is, groove grinders 33a and 33b having groove cutting blades 32a and 32b for cutting grooves are disposed on both sides of the pressure contact surfaces 12a and 12b of the pressure guide portion 14 of the guide rail 10 in the direction of the arrow. The grooves are ground on the pressure contact surfaces 12a and 12b by rotating in the 34 direction. In this way, it is possible to easily and simultaneously form grooves on both sides of the pressure contact portion of the guide rail 10 at the same time.
[0022]
In the above description, the groove provided in the guide rail 10 has a reverse C shape, but is not limited thereto. For example, as shown in FIG. 4 (a), it has a mesh shape, as shown in FIG. 4 (b), in a W shape, as shown in FIG. As shown in (d), the wear powder can be dropped into this groove if it is formed into a U-shape or, in short, given a predetermined angle with respect to the length direction of the guide rail. Can prevent adverse effects.
[0023]
Next, a second embodiment of the present invention in which a plurality of holes are provided in the pressure contact surface of the guide rail will be described. FIG. 5 is a perspective view of a guide rail according to this embodiment. As an integral part of the base 51 of the guide rail 50, a pressure contact guide portion 54 is provided on the pressure contact surfaces 52a and 52b. Although not illustrated, the small hole is connected to a small hole on another surface.
[0024]
When the guide rail having such a structure is used, when it is detected that the car has exceeded the rated speed, the shoe is brought into pressure contact with the pressure contact surfaces 52a and 52b of the guide rail, and the car lifting speed is reduced. At this time, abrasion powder is generated due to friction, but this enters the small hole provided in this surface without remaining on the pressure contact surface in contact with the shoe, and is discharged out of the contact surface. Also, the frictional heat generated by friction is dissipated from the small holes, so that the shoe material is not deformed or altered.
[0025]
In this case, a sufficient braking force can be obtained without impairing the riding comfort of the elevator by excluding the machining area provided with the small holes in FIG. 5 from the contact surface 55 of the guide guide mechanism.
[0026]
FIG. 6 illustrates a method for manufacturing the guide rail as described above. The guide rail is adjusted by grinding the surface in order to reduce the roughness and distortion of the surface. Before or after the guide rail, the guide rail is placed on the mounting table 61 as shown in FIGS. 6 (a) and 6 (b). A rail 62 is placed, and a small hole 65 is made by a drill 64 in the pressure contact guide portion 63 of the guide rail 62. As a result, a small hole 65 penetrating the pressure guide portion 63 of the guide rail 62 is provided.
[0027]
According to this method, it is possible to easily make a small hole in the pressure contact guide portion 63 of the guide rail 62.
[0028]
By the way, in the said embodiment, the braking force fall by the contact with a shoe was prevented by providing a groove | channel or a small hole in the press-contact guide part of a guide rail. However, the present invention is not limited to these, and a groove and a small hole can be provided in the pressure-contact guide portion of the guide rail.
[0029]
Next, another embodiment of the present invention will be described. FIG. 7 shows a perspective view of the guide rail of such an embodiment. A groove 74 and a small hole 75 are provided on both surfaces of the pressure guide portion 72 of the guide rail 71 except for the region 73 where the guide guide mechanism contacts.
[0030]
According to this embodiment, even when the shoe is pressed against the pressure contact surface of the guide rail 71, the wear powder generated by this friction enters the groove 74 or the small hole 75 and does not stay on the pressure contact surface. The braking force is not reduced by the wear powder. Further, since the frictional heat generated by the friction is eliminated from the pressure contact surface by the grooves 74 and the small holes 75, the shoe is not deformed or altered by the frictional heat.
[0031]
In the above-described embodiment of the present invention, the case where the pressure contact guide portion of the guide rail has a groove or a small hole has been described, but the present invention is not limited thereto, and if a guide rail having a recess is formed on the surface of the pressure contact guide portion that contacts the shoe Good.
[0032]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain an elevator apparatus that has a sufficient braking force even when the rated speed of the elevator increases, and thus has a safety device that is highly safe even in high-rise building.
[Brief description of the drawings]
FIG. 1 is a perspective view of a guide rail in an embodiment of the present invention.
FIG. 2 is a view for explaining a state of car braking when the guide rail according to the embodiment of the present invention is used.
FIG. 3 is a view for explaining a method of manufacturing the guide rail according to the embodiment of the present invention.
FIG. 4 is a view for explaining a groove shape provided in a pressure-contact guide portion of a guide rail according to an embodiment of the present invention.
FIG. 5 is a perspective view of a guide rail in another embodiment of the present invention.
FIG. 6 is a view for explaining a method of manufacturing a guide rail according to another embodiment of the present invention.
FIG. 7 is a perspective view of a guide rail in still another embodiment of the present invention.
FIG. 8 is a view showing an example of an elevator apparatus provided with a conventional safety device.
[Explanation of symbols]
10, 50, 62, 71 ... guide rails,
11, 51 ... base,
12a, 12b, 52a, 52b ... pressure contact surface,
13 ... groove,
14, 54, 63, 72 ... pressure contact guide part,
21a, 21b, 21c ... car guide mechanism,
22a, 22b ... shoe,
32a, 32b ... groove machining blades,
33a, 33b ... groove grinding tool,
53, 65, 75 ... small holes,
61 ... mounting table,
64 ... drill.

Claims (5)

Elevator car,
A guide rail that guides this car vertically in the elevator hoistway;
When the car exceeds a predetermined speed, an elevator apparatus comprising a shoe that is brought into pressure contact with the pressure guide part of the guide rail and stops the car,
The elevator apparatus according to claim 1, wherein the pressure-contact guide portion of the guide rail has a plurality of concave portions on a surface that is pressed against the shoe. Elevator car,
A guide rail that guides this car vertically in the elevator hoistway;
When the car exceeds a predetermined speed, an elevator apparatus comprising a shoe that is brought into pressure contact with the pressure guide part of the guide rail and stops the car,
The elevator apparatus according to claim 1, wherein the pressure-contact guide portion of the guide rail has a plurality of grooves on a surface pressed against the shoe. The groove provided in the pressure-contact guide portion has an inverted C shape, a C shape, a mesh shape, a W shape, an inverted U shape, or a U shape with respect to the length direction of the guide rail. The elevator apparatus according to claim 2, wherein the elevator apparatus is any one. Elevator car,
A guide rail that guides this car vertically in the elevator hoistway;
When the car exceeds a predetermined speed, an elevator apparatus comprising a shoe that is brought into pressure contact with the pressure guide part of the guide rail and stops the car,
The elevator apparatus according to claim 1, wherein the pressure-contact guide portion of the guide rail has a plurality of holes on a surface pressed against the shoe. Elevator car,
A guide rail that guides the car vertically in the elevator hoistway, and a shoe that stops the car by being pressed against the pressure guide part of the guide rail when the car exceeds a predetermined speed. An elevator device comprising:
An elevator apparatus according to claim 1, wherein the pressure-contact guide portion of the guide rail has a plurality of grooves and a plurality of holes on a surface pressed against the shoe.

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