JP2003073045A - End point switch of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end point switch of an elevator capable of facilitating installation-adjustment, and capable of reducing installation work time. SOLUTION: This end point switch of the elevator is arranged in the vicinity of the end floor of a car 7 in a hoistway, has a plurality of limit switches 2 arranged in a vertical row in the lifting direction of the car 7, and the limit switches 2 successively operate by being pressed by a driving cam 4 arranged in the car 7 as the car 7 approaches the end floor to prevent the car 7 from lifting by going over a prescribed range of the hoistway. The respective limit switches 2 have a first lever 2b extending from a limit switch body 2f, a second lever 2c having one end connected to the first lever 2b, and fixed to the first lever 2b so that the projecting length can be changed or a connecting angle can be changed, and a roller 2a arranged on the other side of the second lever 2c, and contacting with the driving cam 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator end-point switch provided at the end of an ascending path and in which a plurality of limit switches are arranged in series, and more particularly to a gap size between the limit switch and a drive cam mounted on the side surface of a car. And an elevator end-point switch that can adjust the operating position of the limit switch.

[0002]

2. Description of the Related Art In order to ensure that the upper and lower end point switches of an elevator can be operated, the size of the gap between the end point switch and its operating cam is specified by inspection standards. Conventionally, in this measurement, there is no special measuring instrument, and an operator rides on the elevator car each time and directly measures the gap size using a ruler or the like. However, depending on the mounting position of the end point switch, it may be extremely difficult for an operator to get in and measure, and the accuracy is not high because the measurement is performed in an unreasonable state. As described above, there is a problem in that the workability of measuring the gap between the upper and lower end point switches of the elevator and the drive cam is very poor and the measurement work becomes very difficult depending on the position.

A conventional technique will be described below with reference to FIGS. 6 and 7. FIG. 6 is a side view showing the structure of the upper end point switch in the hoistway. FIG. 7 is a front view of a conventional limit switch. In the figure, 1 is a switch box of the end point switch. In this switch box, a plurality of limit switches 6 are installed at appropriate places in the hoistway so as to face the side surfaces of the car 7 that is rising.

On the other hand, 4 is a drive cam mounted on the outer surface of the car. The car 7 is raised and the drive cam 4 of the car 7 is
By pressing the switch roller 6a of the limit switch 6, the lever 6a is interlocked and the limit switch 6 operates.

In the elevator end point switch having such a structure, conventionally, the following measurements have been performed when adjusting the mounting. First, an operator gets on the ceiling of the car 7 and slowly moves the car 7 upward while the drive cam 4 mounted on the outer surface of the car 7 encounters the switch roller 6a of the limit switch 6 to be measured, The car 7 is stopped at the position where the limit switch 6 was operated. Next, lean on the outside of the car 7 from the ceiling of the car 7,
Reach out and drive cam 4 of car 7 at rest
And switch box 1 with limit switch 6 attached
The gap dimension D from the side surface of the was measured by applying a hand-held ruler and reading the scale. In this measurement procedure, measure the gap dimension D at least at two places,
Check if the switch box 1 has fallen.

[0006]

In the conventional measuring method,
It is necessary for an operator to ride on the ceiling of the car 7 and ascend and move the car 7 to a position where it can be measured. However, in the elevator hoistway, the gap between the top of the elevator shaft and the ceiling of the car 7 that has reached the upper limit. When it is narrow, for example, in a hydraulic elevator, it is necessary to perform the measurement work in a narrow space, and it is difficult to perform the measurement. Further, depending on the mounting position of the limit switch 6, for example, it may be located at the lower side of the car 7 or the like. In such a case, however, the measurement becomes more difficult and the accurate measurement becomes difficult. As described above, in the conventional measurement and adjustment, due to the nature of the work position and the mechanism, there is a great problem in the measurement and adjustment work by the operator.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain an elevator end point switch that can be easily adjusted for installation and can save installation work time. .

[0008]

The elevator end point switch according to the present invention comprises a plurality of limit switches provided in the vicinity of the terminal floor of the car in the ascending path and arranged in a row in the vertical direction of the car. In the elevator end point switch, the limit switch is pressed sequentially by a drive cam provided on the car as the car approaches the terminal floor, and the car is prevented from going up and down beyond a predetermined range of the hoistway.
Each of the limit switches is fixed to a first lever extending from the limit switch body and one side of which is connected to the first lever so that the protrusion length of the limit switch can be changed or the connection angle can be changed. It has a second lever and a roller provided on the other side of the second lever and in contact with the drive cam.

Also, the car is extended along the ascending and descending direction,
It has a switch box to which a plurality of limit switches are fixed, and always forms a part of the switch box casing, and is removed from the switch box when adjusting the mounting of the end point switch, and the switch box and drive cam are removed. And a gauge-combining cover that is disposed between the drive cam and the drive cam so that the height from the switch box of the end surface that comes into contact with the drive cam is the same as the height of the roller tip when the limit switch operates.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a view of the elevator end point switch of the present invention seen from a side surface side of a hoistway. In FIG. 1, reference numeral 1 denotes a switch box which extends in the ascending / descending direction of the car and in which a plurality of limit switches 2 are arranged in a row. Reference numeral 3 denotes a gauge-combined cover which is fixed to the side surface 1a of the switch box 1 with a screw 3b when adjusting the attachment of the end point switch. Gauge combined cover 3
Is the switch box 1 when adjusting the mounting of the end point switch.
In this state, the height of the end surface 3a of the side that contacts the drive cam 4 from the switch box 1 is the same as the height of the tip of the roller 2a when the limit switch 2 operates. FIG. 1 shows a state in which the end surface 3a of the gauge / cover 3 is brought into contact with the cam surface 4a of the drive cam 4 to position the end point switch.

FIG. 2 is a front view of the limit switch 2, and FIG. 3 is a side view of the limit switch 2. 2 and 3
In the above, the first lever 2b is swingably provided on the side surface of the limit switch body 2f of the limit switch 2. The second lever 2c is connected to the tip of the first lever 2b. An elongated hole is formed at the connecting end of the second lever 2c, and a connecting screw 2d is fastened and fixed in this elongated hole. Further, an adjusting screw 2e is brought into contact with the end portion of the second lever 2c, and the length of the entire lever portion can be changed by moving the adjusting screw 2e in and out.

At the other end of the second lever 2c, the roller 2
a is rotatably attached. When the drive cam 4 comes into contact with the roller 2a, the first lever 2b and the second lever 2c rotate counterclockwise in FIG. 2, and the limit switch 2 is turned on at a predetermined position.

In FIG. 4, the cover 3 which also serves as a gauge is attached to the side surface 1a of the switch box 1 with a screw 3 when adjusting the mounting of the end point switch.
It is the figure which looked at the state fixed by b from the upper part of the hoistway. On the other hand, FIG. 5 is a view of the state in which the gauge / cover 3 is always fixed to the back surface of the switch box 1 as seen from above the hoistway. The switch box 1 accommodates the signal cables of the limit switch 2 and the equipment necessary for the operation of the limit switch 2. On the other hand, the housing of the switch box 1 has a large opening on the side opposite to the side on which the limit switch 2 is provided. The gauge / cover 3 is always fixed so as to close this opening, that is,
The gauge / cover 3 always constitutes a part of the housing of the switch box 1.

The gauge / cover 3 is detached from the back surface of the switch box 1 and attached to the side surface 1a of the switch box 1 when adjusting the attachment of the end point switch. The height of the end face 3a of the gauge / cover 3 from the switch box 1 is the same as the height of the tip of the roller 2a when the limit switch 2 operates, as already described.

At the time of adjusting the attachment of the end point switch, it is attached to the side surface 1a of the switch box 1, and the cover end surface 3 is attached.
The end point switch is positioned by bringing a into contact with the cam surface 4a of the drive cam 4, and the end point switch is fixed in the hoistway in this state. By doing so, the distance dimension D between the switch box 1 and the drive cam 4 can be easily attached to the regular position without measuring the distance dimension D using a ruler or the like as in the conventional case.

Further, the limit switch 2 is caused by a slight fall of the switch box 1 and an individual mounting error of the limit switch 2.
If the operating point of is restricted, the connecting screw 2d of the limiting switch 2 is loosened and the adjusting screw 2e is put in and out to adjust the entire length of the lever portion of the limiting switch 2 to freely set the operating point of the limiting switch 2. Can be adjusted.

In this embodiment, the length of the entire lever portion of the limit switch 2 can be made variable, but the first lever 2b and the second lever 2 are used.
The angle of the two may be changed at the connecting portion of c. That is, if the height of the roller 2a from the limit switch body 2f can be finally changed,
Similar effects are obtained.

[0018]

The elevator end point switch according to the present invention is provided in the vicinity of the terminal floor of the car in the ascending path, and has a plurality of limit switches arranged in the vertical direction of the car. As the car approaches the terminal floor, it is pressed by the drive cam provided on the car and operates sequentially,
In an elevator end point switch that prevents a car from going up and down beyond a predetermined range of a hoistway, each of the limit switches has a first lever extending from the limit switch body and one side connected to the first lever. Since there is a second lever fixed to the first lever so that the protrusion length can be changed or the connection angle can be changed, and a roller that is provided on the other side of the second lever and that contacts the drive cam, With respect to the operating point deviation due to the deviation of the mounting position of the switch itself, the operating point deviation can be easily corrected by adjusting the length of the lever arbitrarily, and the installation adjustment can be facilitated and the installation work time can be reduced. It can be an elevator end point switch that can save labor.

Further, the car is extended along the ascending / descending direction,
It has a switch box to which a plurality of limit switches are fixed, and always forms a part of the switch box casing, and is removed from the switch box when adjusting the mounting of the end point switch, and the switch box and drive cam are removed. The switch further has a gauge-combining cover which is disposed between the drive cam and the end face of the end face which comes into contact with the drive cam, and whose height from the switch box is the same as the height of the roller tip when the limit switch operates. The elevator end point switch can be easily attached to a regular position without measuring the distance between the box and the drive cam using a ruler or the like, and the installation work time can be saved.

[Brief description of drawings]

FIG. 1 is a view of an elevator end point switch of the present invention viewed from a side surface side of a hoistway.

FIG. 2 is a front view of a limit switch.

FIG. 3 is a side view of a limit switch.

FIG. 4 is a view showing a state in which the gauge / cover is fixed to the side surface of the switch box with a screw at the time of mounting and adjusting the end point switch, as viewed from above the hoistway.

FIG. 5 is a view of the state in which the gauge / cover is always fixed to the back surface of the switch box as seen from above the hoistway.

FIG. 6 is a side view showing the configuration of a conventional end point switch provided on the upper side in the hoistway.

FIG. 7 is a front view of a conventional limit switch.

[Explanation of symbols]

1 switch box, 2 limit switch, 2a roller, 2b first lever, 2c second lever, 2d
Connecting screw, 2e adjusting screw, 2f limit switch body, 3 gauge combined cover, 4 drive cam, 7 basket.

Claims (2)

[Claims] 1. A limit switch provided in the vicinity of a terminal floor of a car in an ascending path and arranged in a row in a vertical direction of the car, wherein the limit switch is provided as the car approaches the terminal floor. In an elevator end point switch that is pressed by a drive cam provided in the car and sequentially operates to prevent the car from going up and down beyond a predetermined range of a hoistway, each of the limit switches is A first lever that extends, a second lever that is connected to the first lever at one side and is fixed to the first lever so that the projecting length can be changed or the connection angle can be changed, An elevator end point switch comprising a roller provided on the other side of the second lever and in contact with the drive cam. 2. A switch box extending along the ascending / descending direction of the car and having a plurality of the limit switches fixed thereto, which normally constitutes a part of the housing of the switch box, and an end point switch. When the mounting adjustment is performed, the height of the end surface, which is removed from the switch box and disposed between the switch box and the drive cam and which is in contact with the drive cam, from the switch box is The end point switch for an elevator according to claim 1, further comprising a gauge-combined cover that has the same height as the roller tip when the roller is operated.