JP2001240328A - Control device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the control device of an elevator storing a control instrument in a housing 23 vertically movable in the pit 2 part of a hoistway 1 from being left a downward lowered state. SOLUTION: A position detecting means 30 is operated when the housing 23 of the control device installable vertically movable in the pit 2 part of the hoistway 1 is installed in the upper specified position within the moving range. The elevator can normally be operated only when the position detecting means 30 is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device installed in a pit of an elevator shaft and capable of moving up and down.

[0002]

2. Description of the Related Art In an elevator in which a machine room is installed above a hoistway, a penthouse projects on the roof. This penthouse impairs the appearance of the building and blocks sunlight from adjoining lands. For this reason, especially in an elevator having a low lifting stroke, a hoisting machine and a control device may be installed in a pit portion of a hoistway, avoiding installation of a machine room in an upper part.

[0003] However, the pits are usually drilled below the ground, and therefore lack in air permeability. In addition, if the waterproofing treatment is insufficient, the environment is not always good, for example, the pit may be flooded. For this reason, in an elevator in which a control device is installed in the pit, the housing containing the control equipment can be freely moved in the vertical direction, and the housing is normally moved to a higher position within the above-mentioned movement range. In some cases, when working down the pit floor for maintenance and inspection, the work is pulled down as needed, and after use, the work is moved up again.

[0004]

However, as described above, in the conventional elevator control device housed in a vertically movable housing at the pit portion of the hoistway, the maintenance device is pulled down and maintained. Inspections did not push up after work, but were left down after use after being used. For this reason, there was a problem that the control device was exposed to the moisture in the pit and operated in an unplanned environment. In addition, if the pit was flooded, it was feared that control equipment would be flooded.

The present invention has been made to solve the above-mentioned problem, and is housed in a pit portion of a hoistway in a housing which can be freely moved in a vertical direction, and is pulled down as necessary for maintenance. It is an object of the present invention to provide an elevator control device that is checked and the like and that is not lowered and left as it is after use.

[0006]

A first elevator control device according to the present invention is characterized in that a housing of the control device, which can be freely moved vertically and installed in a pit portion of a hoistway, comprises:
The elevator can be operated normally only when it is installed at a predetermined upper position in the moving range.

[0007] A second elevator control device according to the present invention is such that, in the first elevator control device, when the housing is not installed at a predetermined upper position, the elevator is controlled as a check operation. It was made.

[0008] A third elevator control device according to the present invention, in the first elevator control device, turns on an illumination lamp for illuminating the pit when the housing is not installed at a predetermined upper position. It is like that.

A fourth elevator control apparatus according to the present invention is characterized in that, in the first elevator control apparatus, the housing is moved to a predetermined upper position and fixed to a predetermined position by being fixed. , The elevator can be operated normally.

In a fifth elevator control apparatus according to the present invention, in the first to fourth elevator control apparatuses, at least the lower surface of the housing is higher than the floor of the lowest floor in the predetermined position. It is a position.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 3 show:
Embodiment 1 Embodiment 1 of the present invention will be described. 1 and 2, 1 is a hoistway, 1a is a hoistway wall, 2 is a pit of the hoistway 1, 3 is a floor on each floor, 4 is a landing entrance on each floor, and 5 is a landing door on each floor. Here, "-1" is the lowest floor, "-2"
Indicates the next upper floor, and means the number of floors. Reference numeral 10 denotes a pair of car rails which are mounted on the hoistway wall 1a via brackets 11 and stand upright. Reference numeral 12 denotes the lowest floor 3 of the floor.
This is a ladder for descending from -1 to pit 2.

Reference numeral 13 denotes a power receiving panel mounted on the car rail 10 via a mounting arm 14 extending toward the landing entrance 4, and 15 similarly mounts on the car rail 10 via a mounting arm 16. A pit switch box, an operation switch 15a comprising a knife switch for opening and closing the elevator operation circuit, and an illumination light 15b for illuminating the pit 2
And an illumination switch 15s for blinking the illumination lamp 15b
Is stored. 17 is an elevator car, 17a is a car door that opens and closes the entrance of the car 17, 18 is a counterweight, and 19 is a pair of weight rails which are mounted on the hoistway wall 1a on the depth side via brackets 19a and stand upright. It is.

Reference numeral 20 denotes a mounting arm attached to the car rail 10 and extends to the depth side. Reference numeral 21 denotes a pair of pulleys rotatably supported by the mounting arm 20 at a predetermined distance in the horizontal direction. , 22 are ropes wound around a pulley 21 and hung, and 23 is locked at one end of the rope 22 and suspended vertically from a position indicated by a solid line to a position indicated by a chain line in FIG. The housing 23a of the control device is a roller rotatably supported on the side surface of the housing 23 so as to be rotatable up, down, left, and right. 24
Is a pair of U-shaped cross-sections, the upper ends of which are fixed to the mounting arm 20 and the lower ends of which are fixed to the floor of the pit 2 with the openings facing each other, and which are erected on both sides of the housing 23. With the guide rails described above, the rollers 23a are engaged with the grooves to guide the vertical movement of the housing 23.

A weight 25 is fixed to the other end of the rope 22 and suspended from the case 23 in a hanging manner so as to be movable up and down from a position indicated by a solid line to a position indicated by a chain line in FIG. 2
It stops at an arbitrary position in balance with the weight of the third. 24a is a roller rotatably supported on the side of the weight 25 vertically and horizontally. 26 is a weight guide rail configured similarly to the guide rail 24. The cross-section is made of a U-shaped channel, and the upper end is the mounting arm 20 and the lower end is the pit 2 with the openings facing each other. Each of the rollers 2 is fixed to the floor and is erected on both sides of the weight 25.
5a is engaged to guide the vertical movement of the weight 25.

Reference numeral 27 denotes a control cable for connecting the power receiving panel 13 and the housing 23. Reference numeral 30 denotes position detecting means attached to one side of the housing 23. The housing 23 is located at a predetermined upper position in the movement range. When activated. A position detecting means 30 is attached to the car rail 10 via an attaching arm 32.
When the housing 23 is at a predetermined position, the cam 33 is loosely inserted into the hole formed in the groove bottom of the guide rail 24 from the back side and screwed into the side wall of the housing 23 to move the housing 23. This is a fixture made of a wing bolt fixed to the guide rail 24. Here, the predetermined position is a position where at least the lower surface of the housing 23 is higher than the floor of the lowest floor 3-1. Even if the pit 2 is flooded, if the water level rises to the floor of the lowest floor 3-1, the water overflows from the hoistway 1, so it is rare that the water level rises greatly beyond the floor. Because it is possible.

In FIG. 3, the same reference numerals as those in FIGS. 1 and 2 denote the same parts, 30a is a normally open contact which closes when the position detecting means 30 is operated, and 30b and 30c are when the position detecting means 30 is operated. A normally closed contact to be opened, 40 is a safety circuit composed of a door closing switch, a governor switch (neither is shown), etc. 41 is a normal operation which is a so-called operation operation in which the elevator is used for carrying people and luggage. circuit,
Reference numeral 42 denotes an inspection operation circuit for operation for maintenance and inspection of the elevator, and reference numeral 43 denotes a selection switch for selecting between normal operation and inspection operation.

The operation of the first embodiment will be described. 1. Normal operation To activate the elevator by operating the normal operation circuit 41, in FIG. 3, the operation switch 15a is closed, the safety circuit 40 confirms safety, and the selection switch 43 is connected to the terminal a. Side, and the normally open contact 30a must be closed by the operation of the position detecting means 30. That is, during normal operation, the operation switch 15a of the pit switch box 15 must be closed and the housing 23 must be raised to a predetermined position in FIG. In this state, the normally closed contacts 30b and 3
0c are open, so the inspection operation circuit 42
Is not energized, and the illumination switch 15s is normally open, so that the illumination light 15b of the pit 2 is also turned off.

2. Maintenance and Inspection (1) Switching to Inspection Operation To switch from normal operation to inspection operation, turn on the selection switch 43 to the terminal b. As a result, in FIG. 3, in the circuit of + → operation switch 15a → safety circuit 40 → selection switch 43 → inspection operation circuit 42 → −, the inspection operation circuit 42 is energized regardless of the position of the housing 23, It is in the state of inspection operation.

(2) Work in Pit 2 In order to check the control equipment in the casing 23, a person in charge
I need to go down. In the inspection operation, the car 17 can be normally stopped at an arbitrary position. Therefore, after the car 17 is stopped at a position where no hindrance occurs, the ladder 12 is used to move the pit 2 from the floor 3-1 by a known procedure. Go down to
In the pit 2, first, the fixing of the casing 23 and the guide rail 24 by the fixture 33 is released so that the casing 23 can be moved up and down, and then the weight 25 is lifted.
By directly lowering 3, the control device in the housing 23 is inspected while being lowered from a predetermined position.

When the housing 23 is pulled down from the predetermined position, the position detecting means 30 is inactivated and the normally open contact 30a is opened, and the normally closed contact 30b and the normally closed contact 30 are opened.
c is closed. Therefore, even if the selection switch 43 is accidentally turned on to the terminal a, the inspection operation is not canceled and the operation does not return to the normal operation. Further, since the illumination lamp 15b of the pit 2 is also energized by the normally closed contact 30c, even if the illumination switch 15s is shut off, it does not go out.

(3) After Inspection Work and Return to Normal Operation When the inspection work is completed, the casing 23 is pulled up to a predetermined upper position. As a result, the position detecting means 30 operates to close the normally open contact 30a, and both the normally closed contact 30b and the normally closed contact 30c are opened. At this time, since the selection switch 43 is still turned on to the terminal b side, the elevator is in the inspection operation state. Also, the illumination lamp 15b remains lit if the illumination switch 43 is closed. After fixing the casing 23 to the guide rail 24 with the fixture 33,
Open the lighting switch 15s to turn off the lighting lamp 15b,
Escape from pit 2 Further, the selection switch 43 is switched from the terminal b side to the terminal a side to energize the normal operation circuit 41 to return the elevator to the operation operation state.

According to the first embodiment, the position detecting means 30 is operated when the casing 23 is at the upper predetermined position in the moving range, and the elevator is normally operated when the position detecting means 30 is operating. Since the housing 23 is in the operation state, it cannot be returned to the normal operation state when the housing 23 is pulled down. For this reason, after the inspection work is completed, the housing 23 is not left down and left, and the control device in the housing 23 can be operated at a position avoiding the environment in the pit 2. .

When the housing 23 is not at a predetermined position,
Since the elevator is controlled for inspection and operation, the housing 2
When 3 is pulled down, it cannot be returned to the normal operation state. For this reason, the case 23 is not left as it is pulled down. In addition, as long as the housing 23 is in the state of being pulled down, the inspection operation control can be maintained, so that the inspection operation can be performed without interruption.

Further, when the housing 23 is not at a predetermined position,
Since the pit 2 is illuminated by the illumination lamp 15b, the case 23 is not left as it is pulled down.

Furthermore, even if the pit 2 is flooded, if the water level rises to the floor of the lowest floor 3-1, the water overflows from the hoistway 1, so that the water level becomes extremely higher than the floor surface. Rising is rare. Therefore, the predetermined position is at least that the lower surface of the casing 23 is higher than the floor of the lowest floor 3-1. Therefore, even if the pit 2 is flooded,
Can be avoided from being submerged.

Further, since the housing 23 is fixed at a predetermined position by the fixing member 33, the housing 23 can be held at the predetermined position.

Embodiment 2 FIG. FIG. 4 shows a second embodiment of the present invention. In the second embodiment, it is assumed that the housing 23 is moved to a predetermined position, and when the housing 23 is fixed to the position by the fixing device 33, the position detecting means 34 is operated to move the housing 23 to the predetermined position. . That is, in FIG.
1 denote the same parts as in FIG.
A nut 33c fixed to the inner side surface of the guide rail 3 and a hole 33b formed in the bottom of the groove of the guide rail 24 when the housing 23 is at a predetermined position; And a wing bolt 33a for fixing the housing 23.

When the wing bolt 33a is screwed with the nut 33c to fix the housing 23 to the guide rail 24, the wing bolt 33a pushes the lever 34a to operate the position detecting means 34 comprising a limit switch. The position detecting means 34 has a function equivalent to that of the position detecting means 30 in the first embodiment, and can control the normal operation of the elevator when the position detecting means 34 is operating.
When the position detecting means 34 is not operating, the elevator is controlled for inspection and operation, and the illumination lamp 15b is turned on.

According to the second embodiment as well, the function is the same as that of the first embodiment, and it is assumed that the casing 23 has moved to the predetermined position for the first time after being fixed at the predetermined position. The housing 23 is held at a predetermined position.

[0030]

Since the present invention is configured as described above, it has the following effects. In the first elevator control device according to the present invention, a housing of the control device, which can be freely moved vertically and installed in a pit portion of a hoistway, is installed at a predetermined position higher in a movement range. Only when the elevator is in operation. For this reason, pull down the housing and perform inspection work.
There is no need to leave the housing lowered even after the end,
During normal operation, there is an effect that the control device in the housing can be operated at a position away from the pit.

According to the second elevator control apparatus of the present invention, in the above first elevator control apparatus, when the housing is not installed at a predetermined upper position, the elevator is controlled for inspection and operation. It was made. For this reason, even in this case, similarly to the control device for the first elevator, there is an effect that the casing is not left as it is pulled down and the casing is pulled down. As long as it is in the lowered state, the inspection operation control can be maintained, so that the inspection work is not interrupted.

According to a third elevator control apparatus of the present invention, in the first elevator control apparatus, an illumination lamp for illuminating the pit is turned on when the housing is not installed at a predetermined upper position. It is like that. For this reason, there is an effect that it is possible to prevent the case from being left down while being pulled down by the explicit measure of continuous lighting of the illumination lamp.

The fourth elevator control apparatus according to the present invention is characterized in that, in the first elevator control apparatus, the housing is moved to a predetermined upper position and fixed to be installed at a predetermined position. Can be operated normally. Even in this case, the same effect as the control device 1 of the first elevator is obtained, and the housing is moved to the predetermined position only after being moved to the predetermined position and fixed, so that the elevator The normal operation of is performed in a state where the housing is held at a predetermined position,
This has the effect.

According to a fifth elevator control apparatus of the present invention, in the first to fourth elevator control apparatuses, the predetermined position is at least a lower surface of the housing is higher than a floor of the lowest floor. It is a position. For this reason, even if the pit is flooded, it is rare that the water level rises above the floor surface due to the overflow of the water from the hoistway. .

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a hoistway showing the front of an elevator control device according to Embodiment 1 of the present invention.

FIG. 2 is a hoistway cross-sectional view showing a plane of the elevator control device according to the first embodiment of the present invention.

FIG. 3 is an electric circuit diagram of the elevator control device according to the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a main part of an elevator control device according to Embodiment 2 of the present invention.

[Explanation of symbols]

1 hoistway, 1a hoistway wall, 2 pits, 3
Floor, 4 landing doors, 5 landing doors, 10 car rails, 11 brackets, 12 ladders, 13
Power receiving board, 14 mounting arm, 15 pit switch box, 15a operation switch, 15b illumination light,
15c lighting switch, 16 mounting arm, 17 basket, 17a basket door, 18 counterweight, 19
Rail for weight, 19a rail bracket, 2
0 mounting arm, 21 pulley, 22 rope, 23
Housing, 23a rollers, 24 guide rails, 25
Weight, 25a roller, 26 guide rail, 3
0 position detecting means, 31 cam, 32 mounting arm,
33 fixture, 33a wing bolt, 33b hole, 3
3c nut, 34 position detecting means, 34a lever, 43 selection switch.

Claims (5)

[Claims] 1. An elevator control device in which a control device is housed in a housing that can be freely moved vertically and installed in a pit portion of a hoistway, wherein a position detecting means for detecting an installation position of the housing is provided. An elevator control device for controlling the elevator in normal operation when the position detecting means detects a predetermined upper position in the moving range. 2. The elevator control device according to claim 1, wherein when the position detecting means does not detect a predetermined position, the elevator is controlled to perform an inspection operation. 3. The elevator control device according to claim 1, wherein an illumination lamp for illuminating the pit is turned on when the position detection means does not detect a predetermined position. 4. The elevator control device according to claim 1, wherein the position detecting means detects the predetermined position by moving and fixing the housing to the predetermined position. 5. The predetermined position is a position where at least the lower surface of the housing is higher than the floor of the lowest floor.
An elevator control device according to claim 1.