JP3201256B2 - Elevator equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for improving the detection accuracy of an apparatus for detecting the speed and position of an elevator car.

[0002]

2. Description of the Related Art An example of a conventional apparatus for detecting the speed and position of a car will be described with reference to the drawings. FIG. 5 is a perspective view showing the car position detecting device. Reference numeral 1 denotes a guide rail which stands on an elevator shaft and guides the elevator car 2 up and down. Roller. The roller 3 is directly connected to a bearing 5 and is connected to a pulse generator 7 by a coupling 6. Also,
The movable support 8 to which the rollers 3 to the pulse generator 7 are attached and the fixed support 9 fixed to the car 2 are connected by support pins 10.

When the car 2 moves up and down, the roller 3 rolls on the surface of the guide rail 1 and this rolling power is transmitted to the pulse generator 7 to generate a pulse signal proportional to the traveling distance of the car 2. I do. The pulse signal is processed by a control device (not shown) to detect the position of the car 2. In some cases, the rotary encoder is driven to detect the operating direction and speed of the car 2 with the same structure.

[0004]

By the way, in many cases, the car 2 is provided with a guide shoe for guiding the traveling of the car 2 along the guide rail 1.
In this case, oil is applied to the guide rail 1 in order to reduce the frictional force between the guide rail 1 and the guide shoe. Therefore, the roller 3 slips due to the applied oil, and there is a possibility that the speed and the position of the car cannot be accurately detected.

[0005]

According to the present invention, a spiral groove is provided on an outer peripheral surface of a roller (a surface in contact with a guide rail).
Oil is discharged to the side of the roller along the groove as the roller rotates, so that the oil does not stay between the roller outer peripheral surface and the guide rail.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a spiral groove is provided on the outer peripheral surface of a roller in one of right-handed and left-handed directions or in both directions. In another embodiment of the present invention, the pitch is changed for each groove.
In still another embodiment, of the above-mentioned grooves, a plurality of grooves in one or both directions are provided.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
FIG. 2 is a view schematically showing the outer peripheral surface of the roller 3, and FIG.
It is an A partial sectional view. In the figure, reference numeral 20 denotes a spiral groove provided on the outer peripheral surface 31 of the roller 3 in the left-hand thread direction, and has a triangular cross section as shown in FIG.
Is indicated by a straight line. According to the present embodiment,
The oil between the guide rail 1 and the outer peripheral surface 31 of the roller 3 is
Through the groove 20, the right side surface 32 or the left side surface 33 of the roller 3
As a result, the roller 3 can be prevented from slipping due to oil. Although the number of the groove 20 is one in this embodiment, a plurality of grooves 20 may be provided.

In the above embodiment, when the roller 3 rotates,
The spiral groove 20 causes an axial (left-right direction in FIG. 1) force to be generated. Therefore, an embodiment for preventing the generation of the axial force will be described below. 3 is a view corresponding to FIG. 1, and FIG. 4 is a partial cross-sectional view taken along line BB of FIG. In the figure, reference numeral 21 denotes a spiral groove provided on the outer peripheral surface 31 of the roller 31 in the right-hand thread direction, and its pitch P2 is different from the pitch P1 of the groove 20.

According to this embodiment, in addition to the oil discharging effect, since the spiral directions of the grooves 20 and 21 are opposite, the generation of the axial force of the roller 3 can be prevented. Note that the pitches P1 and P2 of each groove may be the same. Also, in this embodiment, one or both of the grooves 20 and 21 may be provided in plural.

[0010]

As described above, according to the present invention,
Even when oil is applied to the guide rail, the roller is prevented from slipping, and the speed and position of the car can be accurately detected.

[Brief description of the drawings]

FIG. 1 is a view schematically showing an outer peripheral surface of a roller according to an embodiment of the present invention.

FIG. 2 is a partial sectional view taken along line AA of FIG.

FIG. 3 is a view schematically showing an outer peripheral surface of a roller according to another embodiment of the present invention.

FIG. 4 is a partial sectional view taken along line BB of FIG. 3;

FIG. 5 is a perspective view showing a conventional car position detecting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 2 Car 3 Roller 7 Pulse generator 20, 21 Groove 31 Roller outer peripheral surface 32, 33 Roller side surface P1, P2 Pitch

Claims (5)

(57) [Claims] 1. A guide rail erected on a hoistway of an elevator, and a roller rotatably provided on the car so as to roll up and down on the surface of the guide rail while moving up and down along the guide rail. And by the rolling power of the roller,
An elevator apparatus comprising: a device for detecting a speed and a position of a car; wherein a spiral groove is provided on an outer peripheral surface of the roller. 2. The elevator apparatus according to claim 1, wherein the groove is provided in one of a right-handed screw direction and a left-handed screw direction. 3. The elevator apparatus according to claim 1, wherein the grooves are provided in both a right-handed screw direction and a left-handed screw direction. 4. The elevator apparatus according to claim 2, wherein one or more grooves are provided in one direction. 5. The elevator apparatus according to claim 3, wherein a pitch of each groove is different.