KR870000473Y1 - An elevator - Google Patents

Abstract

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Description

Elevator safety circuit

1 is a schematic structural diagram of an elevator for explaining the operation of the present invention.

2 is a conventional circuit diagram.

3 is a circuit diagram of the present invention.

4 is a timing chart of each part in the present invention.

* Explanation of symbols for main parts of the drawings

SW ₁ : Cage internal and upper operation selector switch SW ₂ : High speed, low speed selector switch

43H: High Speed Operation Relay 43S: Low Speed Operation Relay

40D: Elevator door switch check relay

40G: Cage door switch check relay G S: Cage door switch

DS ₁ -DS _n : Door closing detection switch of 1st floor-n floor G: Relay for alarm command

E, F: auxiliary relay for continuous and repeat operation of relay (G)

G _a1 -G _a4 : contact _a of relay (G) E _a : contact _{a of} relay (E)

E _b : contact b of relay (E) F _a : contact _{a of} relay (F)

F _b : b contact of relay ('F) Bz: Buzzer for alarm

Lu: Upward indication lamp L _D : Downward indication lamp

The present invention is designed to prevent accidents such as installation, maintenance accidents, accidents on elevator cages, and hatch doors installed on each floor where elevators stop, which are the main causes of elevator safety accidents. It relates to the safety circuit of an elevator.

In general, the safety accidents of elevators are not limited to passengers, but there are many concerns that they may be caused by regular maintenance work during construction or after installation.

Referring to FIG. 1, when the elevator is installed or repaired, the elevator moves upward or downward by manipulating the operation panel of the operator M ₂ inside the cage CA or the operator M ₃ above the cage. In this case, the cage upper and lower workers (M ₄ ), who do not detect this (M ₁ ) will cause a very dangerous accident.

In addition, when the operator inside the cage (M ₂ ) operated the operating panel installed inside the cage (CA) without knowing the external situation, it causes a dangerous accident to the worker (M ₃ ) in the upper cage.

If the elevator is installed and repaired, it is necessary to move the cage (CA) from the lowest floor to the uppermost floor or from the upper floor to the lower floor to perform work such as the installation work of the control device or the position of the structure necessary for each floor. It will be higher.

Conventionally, as shown in FIG. 2, when the inside of the cage and the upper operation selection switch SW ₁ and the high speed and low speed selection switch SW ₂ are switched to the low speed side during the installation and maintenance work of the elevator, the low speed operation relay 43S ) Is driven to perform low speed operation,

When an accident occurs, there is a problem that can not immediately respond to a safety accident occurs because there is no alarm and display device to immediately notify the status and display.

In the first road and the second road, reference numeral 1-3 shows a building structure, the first floor layer -3 H ₁ -H ₃ are each hatch door of the first floor layer -3 (HATCH DOOR), BA _1, BA ₂ is a work stand, SH ₁ , SH ₂ is sheave, Ro is rope, CW is counter weight, CD is cage door, GS is cage door switch, 43H is high speed relay, DS _1- DS _n indicates the door closing detection switch on the 1st floor-n floor, 40D indicates the hoistway door switch check relay, and 40G indicates the cage door switch check relay.

The present invention, in view of the above-mentioned problems in the prior art, the fall accident during low-speed operation and high-speed driving in the cage or at the top of the cage that may occur during the installation and maintenance of the elevator, the opening and closing of the doors and cage doors of each floor To prevent accidents caused by falling in advance,

When described in detail by the accompanying drawings as follows.

As shown in FIG. 3, the contact a of the drive relay 15a at the time of elevator operation at the both ends of the power supply (+) and (-), the contact a 43S ₁ of the low speed operation relay 43S, and the alarm command relay G Alarm command relay (G) with the resistors (rG) and capacitor (cG) connected in series at both ends of the b contacts (Eb) and (Fb) of the auxiliary relays (E) and (F) Connected in parallel to each other, and the contacts b, 40Gb and (0Db) of the cage and the hoistway door switch check relays 40G and 40D are connected to both ends of the contact 43S ₁ of the relay 43S in parallel. The parallel connection is made in parallel with a contact 43H ₁ of the high-speed drive relay 43H,

In addition, contact a (Ga ₁ ) of the alarm command relay (G) and contact a (Fa) of the auxiliary relay (F) are connected to the auxiliary relay (E) connected in series with a resistor (rE) and a capacitor (CE) at both ends. Connected in series,

Further, the contact a (Ga ₂ ) of the alarm command relay (G) and the contact a (Ea) of the auxiliary relay (E) are connected in series and connected in series to the auxiliary relay (F).

In addition, a buzzer (Bz) which emits an alarm sound in the event of an accident is connected to the contact a (Ga ₃ ) of the alarm command relay (G) in series.

The upper display lamp LU and the lower display lamp LD are connected in series to the a contact Ga ₄ of the alarm command relay G in parallel to form a series connection.

Referring to the effect of the present invention configured as described above are as follows.

First, as is well known at the time of installation and maintenance of the elevator, when the high speed and low speed selection switch SW ₂ shown in FIG. ₂ is switched to the low speed shaft (contacts b ₁ and b ₂ ), the low speed operation relay 43S Is driven so that its a contact 43S ₁ shown in FIG. 3 is connected,

Power supply (+) is contact 15a (connected because elevator is running) → contact 43S ₁ → contact E _b (F _b ) (secondary relays E and F are not driven Connected) → alarm command relay (G) → power supply (-), and the alarm command relay (G) is driven.

In this way, when the relay G is driven, its contacts a (Ga ₃ ) and (Ga ₄ ) are connected to each other and the power is supplied to the warning buzzer (Bz) and the upper and lower display lamps (LU) and (LD) connected in series. Since the buzzer (Bz) is sounded and the lamps (LU) and (LD) are blinking, an alarm sound and an indication are made to prevent an accident in advance.

Next, during the elevator driving in the normal operation (that is, high speed operation), any door of the cage door CD or the hatch doors H _{1 to} H ₃ shown in FIG. 1 is opened by mischief or mistake. The switch C in Fig. ₂ is the inner cage (In Cage), the side (contact (a) side),

Since the high speed and low speed switching switches SW _{2 are} switched to the high speed side (contact (a ₁ ) and (a ₂ ) side), the high speed operation command relay 43H is driven.

In this state, when the elevator is running as described above, any door of the cage door (CD) or the hatch doors (H _{1 to} H ₃ ) on the hatch side is opened. Since the relays 40D and 40G are not driven and the corresponding ones of the b contacts 40D _b and 40G _b shown in FIG. 3 are connected, the power source (+) is connected to the contact 15a → contact ( 43H ₁ ) → Contact (40G _b ) or Contact (40D _b ) → Contact (E _b ) → Contact (F _b ) → Alarm command relay (G) → Power supply (-). Since G is driven, the a contacts Ga ₃ and Ga ₄ are connected to the alarm buzzer Bz and the upper and lower display lamps LU connected in series as described above. In this case, because the power is applied, the buzzer (Bz) sounds and the lamp (LU) (LD) turns on to display an alarm sound and display to prevent an accident.

Here, the auxiliary relays (E) and (F) cause the alarm command of the buzzer (Bz) to be waved by causing the driving of the alarm command relay (G) to be continuous and repetitive, and the display lamps (LU), ( The lighting of LD) is driven to flicker in a flicker manner.

That is, when the alarm command relay (G) is driven, the power supply (+) is supplied in the order of the contact (Ga ₂ ) → auxiliary relay (F) → power (−) to drive the auxiliary relay (F).

Thus, because the auxiliary relay (F) that when the alarm command for relay (G) and b-contact of the auxiliary relay (F) that are connected in series (F _b) is opened to stop driving the relay (G) for signaling command drive, wherein The release time of the relay (G) is delayed during the delay time due to the time constants of the resistor (rG) and the capacitor (cG) connected in parallel, so that the buzzer (Bz), the lamp (L _U ), and the (L _D ) operate once. It stops.

On the other hand, at the time when the auxiliary relay F is driven, the power supply (+) is supplied in the order of the contact Ga ₁ → the contact Fa, the auxiliary relay E, the power supply −, and the auxiliary relay E. Will be driven.

However, as the above-mentioned alarm command relay (G) is stopped, its contact a (Ga ₁ ) is opened and the auxiliary relay (E) is stopped. At this time, the resistor (rE) and the condenser in parallel to the relay (E) are condensed. The driving stop time of the relay E is delayed during the time constant time by (cE).

In this way, the driving and driving stop operation of the alarm command relay (G) is continuously and repeatedly controlled to increase the alarm effect by generating a flickering alarm sound and a flicker function of the lamp. .

In addition, since the contact point Ea of the relay E is opened and the relay F is also stopped due to the interruption of the relay E, at this time, the power supply + is the contact point 15a → the contact point 43H ₁ → the contact point 40Gb. Alternatively, contact 40D ₆ → contact (Eb) → contact (Fb) → alarm command relay (G) → power supply (-) are supplied in order, and re-entry relay (G) is driven. Since Ga ₃ and Ga ₄ are contacted, the buzzer Bz and the lamps L _U and L _D are operated again.

That is, by repeatedly controlling the driving of the alarm command relay G in accordance with the operation of the auxiliary relays E and F, the alarm efficiency is improved by performing the wave buzzing sound and the flicker lighting function of the lamp. I can make it

Its operating state is as shown in the timing chart of FIG.

The present invention, which operates as described above, can emit and display an alarm sound as a lamp in case of accidents caused by falling or collision accidents during elevator installation, maintenance, cage doors during elevator driving, and opening of hatch doors. It is a practical design that can ensure the safety of the passengers as well as the operator to install and repair the elevator directly.

Claims (2)

In the case of ascending and descending operation by cage internal or external operation during low speed operation during installation and repair of the elevator, or when the cage door or hatch door is opened during high speed operation during normal operation, The alarm command relay G is serially connected to the a contact 43S ₁ of the a contact 15a, the low-speed operation relay 43S, and the b contacts Eb and Fb of the auxiliary relays E and F. High speed operation is performed by connecting the contacts b, 40Gb and 40Db of the cage and the hoistway door switch check relays 40G and 40D to both ends of the a contact 43S ₁ of the relay 43S in parallel. The parallel connection is made in parallel with a contact 43H ₁ of the relay 43H, and the a contact Ga ₁ of the relay G and the a contact Fa of the auxiliary relay F are connected to the auxiliary relay E. ) Is connected in series, and is connected in series to the auxiliary relay F with the contact a (Ga ₂ ) of the relay G and the contact a (Ea) of the auxiliary relay E in parallel. The safety of the elevator, characterized by connecting the buzzer (Bz) and the upper and lower display lamps (L _U ), (L _D ) to the contact a (Ga ₃ ) (Ga ₄ ) of the relay (G), respectively. Circuit. 2. The resistor rG, the capacitor cG, the resistor rE, and the capacitor cE connected in series to the alarm command relay G and the auxiliary relay E so as to have a flicker function. Elevator safety circuit characterized in that.