JPH0986820A - Power supply device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the wear of a brush sliding on a trolley wire and prevent bad running due to the wear in advance in a device using the trolley for supplying power to a car and a machine room and communicating between them. SOLUTION: A micro switch 4 mounted at the position where a brush 7 comes into contact with an insulating cover 3 of a current collector whose position is shifted by the specified amount wear of the brush 7 is mounted on a bracket 6 to detect the wear of the brush 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device, and more particularly to power supply to a car and a machine room of an elevator using a trolley wire and signal transmission.

[0002]

2. Description of the Related Art The shape of a current collecting brush in a trolley device is such that, in a normal use state, the contact portion of the trolley wire has an angled portion to reduce friction.

However, when it is worn for a certain amount or more, the surface thus processed is not scraped off, the corner hits the insulating portion of the trolley wire, and the running property deteriorates.

Further, there is a risk that the current collector mold portion and the trolley wire mold portion may abut against each other, making electrical contact impossible.

In addition, if the application does not have a function of stopping the elevator even when the power supply is cut off, such as for exclusive use of lighting, the brush that does not make electrical contact is not removed from the trolley wire. Continuing running, there was a risk that the insulating part of the trolley wire and the insulating part of the current collector would be in contact with each other, damaging each other, but there has been no means for detecting this in advance.

[0006]

When the brush is worn over a certain amount as described above, the processed portion such as the corner of the brush is scraped off, and the corner of the brush is attached to the insulating portion of the trolley wire. There is a risk that it will hit and the runnability will deteriorate.

Further, if it is scraped further, there is a risk that the insulators will abut against each other and an electrical abnormality will occur.

[0008] Even if the power is cut off, if it is not used to stop the elevator in particular, the vehicle is kept running, and the insulating portion of the trolley wire and the insulating portion of the current collector are rubbed against each other, damaging each other. There was also the fear that it would end up.

An object of the present invention is to detect the life of the brush due to friction and prevent the damage to the equipment as described above.

[0010]

When the brush is worn by a certain amount, the position of the current collector cover with respect to the trolley wire shifts so that the brush approaches the fixture side.

When the current collector cover comes to that position, a microswitch is attached to the fixed side of the trolley wire so that the current collector cover can be detected, and detection can be performed by contacting the current collector cover.

When the brush is worn, the wear detection sensor can prevent the traveling state of the current collector from being deteriorated and the device from being damaged, so that it is possible to overlook the brush replacement time.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

FIG. 1 is an overall view of an elevator using a trolley wire, and FIG. 2 is a view showing a contact state between a trolley wire and a current collector and a detection method.

1 is a trolley wire, 2 is a current collector, and the brush is pressed against the trolley wire by a spring to move along the trolley wire.
3 is an insulating cover for collecting current, which has a built-in brush, and 4 is a micro switch for detecting brush wear, which is installed near the floor, which is frequently used.

Reference numeral 5 denotes a trolley wire fixture, and 6 denotes a bracket for mounting the trolley wire fixture 5 in the tower.

The trolley wire 1 has a bracket 6 in the hoistway 8.
A plurality of trolley wires 1 are fixed at intervals of 1.5 to 2 m.

Wires 4a, 4 connecting to the microswitch 4
b is connected to a disconnection detection circuit (not shown) provided in the machine room 10.

Normally, as shown in FIG. 1, the current collector 2 slides along the trolley wire 1, but as the brush 7 wears, the current collector insulating cover 3 moves toward the trolley wire 1 side. Move gradually.

The abrasion of the brush 7 can be detected by contacting and pushing the tip of the microswitch 4 attached to the bracket 6 when the current collector insulating cover 3 that has moved when the brush 7 is worn by a certain amount or more is detected.

This signal is sent to a detection circuit (not shown) via the lines 4a and 4b and displayed on the control panel 11 as an error.

In this embodiment, the wear amount detecting sensor of the brush 7 is installed on the trolley wire 1 side, but the same effect can be obtained by installing the sensor on the collector 2 side.

[0023]

According to the present invention, the replacement time due to abrasion of the brush can be seen at a glance. In addition, running defects such as abnormal wear can be detected early.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an elevator that uses a trolley wire.

FIG. 2 is an explanatory diagram showing a contact state between a trolley wire and a current collector and a detection method.

[Explanation of symbols]

1 ... trolley wire, 2 ... collector, 3 ... collector insulating cover, 4
... Micro switch, 4a, 4b ... Micro switch connection wire, 5 ... trolley wire fixture, 6 ... bracket, 7 ...
brush.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Yoshioka 1070 Imo, Hitachinaka City, Ibaraki Prefecture Mito Factory, Hitachi Ltd. (72) Inventor Masato Kubo 2 days system plaza at 832 Horiguchi, Hitachinaka City, Ibaraki Prefecture Katsuta Hitachi Mito Engineering Co., Ltd.

Claims (6)

[Claims] 1. A trolley arranged in a hoistway of an elevator having a vertical or inclined angle and used for supplying electric power from a machine room of the elevator to a car and for transmitting a safety circuit signal from the car to the machine room. A detection device for an elevator, comprising a sensor for detecting a relative wear amount of a brush that comes into contact with the trolley wire in the wire. 2. The power feeding device according to claim 1, wherein a sensor for detecting that the wear of the brush has reached a certain amount is electrically attached to the trolley wire side. 3. The elevator power feeding device according to claim 2, wherein when the brush is worn by a certain amount, the sensor is provided on the current collecting side to electrically detect the sensor. 4. The elevator power feeding device according to claim 1, wherein a signal detected by a sensor that the brush has worn a certain amount is taken into a microcomputer. 5. The electric power supply for an elevator according to claim 4, wherein the detection circuits for the respective trolley wires are connected in series, and when any one of the brushes wears for a certain amount, a means for detecting the entire circuit is provided. apparatus. 6. The elevator power feeding device according to claim 1, wherein when it is detected that the brush has worn out for a certain amount or more, it is displayed on an elevator control panel or an alarm is sounded.