JPH0532372U - Elevator door alarm device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the carrier from colliding with the door when carrying the luggage into the car using the carrier. [Structure] When the transport vehicle approaches the door while the door is closed, the first detector responds, and the circuit of P-DCa-S1a-K1-N activates the relay K1 and P-K1a- R1
-R2-BZ-N circuit generates a ringing sound smaller than the alarm BZ, and when the transport vehicle further approaches the door, the second detector responds, and similarly, the relay K2 is energized and the contact K2a is closed and resistor R1 is short circuited, producing a louder ringing sound.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an elevator door alarm device suitable for a luggage elevator.

[0002]

[Prior Art]

 In general, doors for elevators for luggage have doors that open and close up and down. Then, when driving a forklift to carry luggage into the car, the driver often puts the forklift on the door while the door is opening and closing because it is difficult to see the front door. They could collide and damage this door or forklift.

Therefore, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 61-108279, a device that sounds an alarm when the forklift approaches a predetermined distance in front of the door during opening and closing of the door. Is proposed.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional technology, for example, if the setting position of this detector is too close to the door, the forklift will not stop even if the detector operates and the alarm sounds while the door is closed. I had a chance to collide. Also, if the detector is set too far away from the door, the alarm will sound each time the forklift responds to the detector, annoying others.

The present invention has been made in view of the above-mentioned drawbacks, and an object thereof is to provide an alarm for an elevator door that can sound an alarm device with an appropriate size when a forklift approaches the door by an appropriate distance. To provide a device.

[0006]

[Means for Solving the Problem] This object is provided with a detector for detecting that a transport vehicle approaches the door of an elevator, and when the detector is activated while the door is opening and closing, an alarm is issued. An alarm device for an elevator door equipped with a means for ringing a device, wherein a plurality of detectors that respond to the distance at which the transport vehicle approaches the door are provided, and the transport vehicle is in front while the door is opening and closing. This is accomplished by providing a means for approaching the entry door and increasing the ringing of the alarm each time the detector responds.

[0007]

[Action]

 According to the present invention, since the luggage is loaded into the car while the door is opening and closing, the forklift approaches the door, and when the first detector responds, the alarm sounds with a small sound. Therefore, if the driver of the forklift immediately stops the forklift, it can prevent the forklift from colliding with the door, and the alarm sounds a small sound, so it does not disturb others. If the driver does not notice this sound, the second detector responds and the alarm sounds louder, so that the driver notices that the door is approaching and can immediately stop the forklift.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 is a side sectional view of an elevator door alarm device according to an embodiment of the present invention when a transport vehicle approaches the door. In the figure, 1 is a hall, 21 is a hall door, 3 is a car, and 22 is a car door. When the car door 22 is opened and closed, the hall door 21 is also opened and closed via an engagement device (not shown). Reference numeral 4 is a carrier for transporting the luggage 5 into the car 3, for example, a forklift, 6 is a driver who drives the forklift 4, and S1, S2, and S3 are the forklift 4 approaching a predetermined distance in front of the landing door 21. The first to third detectors that detect the forklift 4 using ultrasonic waves are configured to detect the first to third detectors S1, S2, and S3 in this order, and BZ is the first to third detectors. Third detector S1, S2, S3 is an alarm that sounds when it responds. The landing door 21 and the car door 22 are collectively referred to as the door 2.

FIG. 1 is an electrical connection diagram of the alarm device of the present invention. P and N are DC power supply terminals, S1a, S2a and S3a are energized when the first to third detectors S1, S2 and S3 respond. Normally open contacts of relays not shown, DCa and DOa are normally open contacts of relays not shown that door 2 is energized during closing or opening, and K1, K2, and K3 are 1 to 3 are relays that detect that the third detector S1, S2, S3 has responded, K1a, K2a, K3a are normally open contacts, and R1, R2 are resistors connected in series with the alarm BZ.

Next, the operation of this embodiment will be described.

Now, it is assumed that the driver 6 drives the forklift 4 and approaches the hall door 21. At this time, if the door 2 is closed, the first detector S1 responds first, and the relay K1 is energized by the circuit of P-DCa-S1a-K1-N. As a result, the contact K1a is closed, a circuit of P-K1a-R1-R2-BZ-N is formed, and the alarm BZ makes a ringing sound. By the way, in this case, since the resistors R1 and R2 are connected in series, a small ringing noise is generated. When the driver 4 hears this sound, he / she immediately notices that the forklift 4 has to be stopped because the door 2 is being opened / closed, and immediately stops the forklift 4. Therefore, the forklift 4 is prevented from colliding with the landing door 21, and the ringing noise is small, so that it does not disturb other people.

By the way, when the driver 4 does not notice the small noise and the forklift approaches the landing door 21, the detector S2 responds, and the relay K2 is energized and the contact K2a is closed by the same operation. The resistor R1 is short-circuited by the contact K2a, and a louder ringing noise is generated to warn the driver 6 that the forklift 4 is further approaching the hall door 21.

As described above, as the forklift 4 approaches the landing door 21, the first to third detectors S1 to S3 respond and the alarm BZ sounds louder. By setting the setting positions of the 1st to 3rd detectors and the loudness of the ringing sound generated at that time to an optimum value for the site, the forklift 4 collides with the door 2 with the optimal ringing sound You can prevent it.

Although three detectors are used in this embodiment, they can be freely changed depending on the application site. Although the detector uses ultrasonic waves, it goes without saying that light, electromagnetic waves or the like may be used.

[0016]

[Effect of the device]

 As described above, according to the present invention, a plurality of detectors are provided for detecting that the transport vehicle has approached a predetermined distance ahead, and the alarm sound is increased each time the detectors respond. With this configuration, when the driver hears this ringing sound, the truck stops at the proper position, prevents the truck from colliding with the door, and the ringing noise is small, so it is annoying to the people around. It has the effect of not applying

[Brief description of drawings]

FIG. 1 is an electrical connection diagram showing an embodiment of an elevator door alarm device of the present invention.

FIG. 2 is a side sectional view of an elevator door alarm device according to an embodiment of the present invention when a transport vehicle approaches the door.

[Explanation of symbols]

 4 Forklift 21 Landing door 22 Car door BZ Alarm DCa Closed door normally open contact DOa Opened door normally open contact K1 to K3 Relays S1 to S3 First to third detection R1 and R2 resistors

Claims (1)

[Scope of utility model registration request] 1. A detector is provided near the door of an elevator for detecting that a transport vehicle is approaching, and means is provided for activating an alarm when the detector is activated while the door is being opened or closed. In an elevator door alarm device, a plurality of detectors that respond to a distance at which the transport vehicle approaches the door is provided, and the transport vehicle approaches the door while the door is opened and closed, and the detector is An elevator door alarm device, comprising means for increasing the ringing sound of the alarm device each time it responds.