JPH0748632Y2 - Elevator door protector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of an elevator door protection device having a door drive device for automatically opening and closing the door.

[Conventional technology]

Conventionally, as this type of automatic door protection device, an operating piece is provided at the front end of the door, and when an object collides with this operating piece during the door closing motion, this operating piece is bent and the control device is operated by this bending, The one that stops or reverses the door closing motion is generally used. Also, when the door itself has recently acted as an operating piece and an object hits this door during the door closing motion to stop the door closing motion, this blocking force is detected and the door closing motion is stopped or reversed. The things that make them are put to practical use. On the other hand, in the case of doors installed at elevator doorways such as car doors and landing doors, a door accident and a frame near the door were recently detected during a door opening operation as a trapping accident. Since there was an accident that a finger or the skirt of a kimono was caught between the two, an elevator door protection device to prevent such an accident has also been proposed, and as a typical one, it is described in Japanese Patent Publication No. 55-3272. A device can be mentioned. This device, when the door driving device is operating to open the door, and when the door receives a stopping force or is stopped by an object, keeps supplying the driving force to the door under such a condition. , Was created with a focus on increasing driving force. Specifically, during the opening operation of the door, when the driving force of the door is larger than the normal opening force of the door, the control device detects the driving force to stop the opening operation of the door. Is designed to reverse the stop. These elevator protection devices can ensure the safety of elevator users even during the opening operation of the door, but when the user leans on the door or presses the door, it continues to operate, and a call is generated on another floor. However, the elevator is in a stopped state on that floor, which causes a problem that the operation efficiency is reduced. Various devices have been created since then as a kind of device, and it is assumed that such inconvenience does not occur in conventional devices.
For example, there is a device described in Japanese Patent Publication No. 59-11507. This latter device is provided with a detection device near the door of the car or the door of the landing, which detects an abnormal approach of the passenger when the door is closed.When the detection device detects an abnormal approach of the passenger, the door opening operation is performed. In addition to blocking the alarm, an alarm is issued to urge passengers to move away from the door. In this latter device, the alarm is issued in this way to prompt the elevator user to move away from the door, and the user leans on the door or presses the door, so that the elevator is stopped and the operation efficiency is increased. Does not occur, as is the case with the former device.

[Problems to be solved by the device]

Thus, according to the latter device, the inconvenience that the operation efficiency of the elevator is lowered by the action of the elevator user can be solved, but such an inconvenience is not caused only by the action of the user. In other words, foreign objects are often caught in the sill of the door of the car or the door of the hall that operates in conjunction with it.However, if the door is opened and operated under such a situation, the former In the device, after the opening operation of the door is stopped or reversed, the opening and closing operations are repeated, and the elevator is stopped at the specific floor. Further, in the latter device, it is not possible to detect itself that a foreign object is trapped in the sill of the door, and therefore the opening operation of the door may be stopped midway, resulting in a situation where the elevator is stopped. Although the case where the door is in the opening operation has been described above, the same situation occurs in the case where the door is in the closing operation, and the operation efficiency of the elevator is reduced.

The present invention has been made in view of the circumstances of the prior art, and its purpose is to prevent the elevator from being stopped at a specific floor due to the presence of foreign matter in the door sill. It is therefore an object of the present invention to provide an elevator door protection device that does not cause a decrease in elevator operation efficiency.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a "door drive device for automatically opening and closing a door provided at an elevator entrance and exit, and a normal drive from the door drive device during driving of the door. When a driving force equal to or greater than the driving force is generated, the generation of the driving force is detected, and a control device having a function of stopping or reversing the stop of the driving of the door, and a foreign matter at the door sill portion in a protection device for an elevator door. Foreign matter detecting means for detecting the presence of the foreign matter in the door sill, a notification means capable of notifying the elevator user of a message indicating the presence of foreign matter in the door sill, and the foreign matter detecting means detecting the driving force generation by the foreign matter detecting means. It is possible to identify that the presence of foreign matter in the door sill has been detected, and if these things are identified at the same time, a command is issued to the notification means and the foreign matter is present in the door sill. It provided a foreign matter discrimination means for informing the message indicating "be characterized.

[Action]

Since the present invention is configured as described above, when a driving force higher than the normal driving force is generated from the door driving device while the door is being driven, the control device detects the driving force generation, Although the driving of the door is stopped or reversely stopped, if a foreign matter is present in the door sill, the foreign matter detecting means detects the presence of the foreign matter. Then, the foreign matter identifying means identifies that the control device has detected the driving force generation and that the foreign matter detecting means has detected the presence of the foreign matter,
A command is issued to the notification means to notify the elevator user of a message indicating that a foreign object is present in the door sill.

This allows the elevator user to know that the elevator is inoperable due to the presence of foreign matter in the door sill, and because the foreign matter is removed, it is Thus, it is possible to prevent the elevator from being stopped at a specific floor.

〔Example〕

Hereinafter, an embodiment of a protection device for an elevator door according to the present invention will be described with reference to the drawings.

FIG. 1 is an overall front view of an elevator car showing an embodiment of an elevator door protection device of the present invention, FIG. 2 is an enlarged view of part A of FIG. 1, and FIG. 1
It is an A section enlarged view of a figure.

In the figure, the door 1 is suspended at its upper part by a suspension wheel 2 rolling on a rail 3, and is guided at the lower part by a door guide 26 which fits and slides in a groove of a sill 25 to open and close left and right. The door drive motor 9 is
Power is transmitted to the drive pulley 24 via the chain 10 to rotationally drive the drive pulley 24. The pulley 24 is provided with a fulcrum 12 of a coaxial cam link 13. One end of the cam link 13 is connected to one end of the connecting link 8 at a fulcrum 11, and the other end of the connecting link 8 has one end of the car 4 A fulcrum 28 is connected to the frame body in the middle of the main lever 7 which rotates around the fulcrum 27. The other end of the main lever 7 is connected at the fulcrum 29 to the other end of the link 6, one end of which is connected to the door 1 at the fulcrum 30.

On the other hand, a V-shaped groove a is formed at the other end of the cam link 13, and a roller 14 pressed by a constant pressure is fitted in the groove a. That is, the roller 14 is configured such that the roller base 16 is fixed to the leaf spring 18 fixed to the drive pulley 24 via the leaf spring support base 17,
The leaf spring 18 is supported by a roller shaft 15, and the leaf spring 18 is a compression spring 19.
Is pressed by. The compression spring 19 is attached to a compression spring support 22 fixed to a drive pulley 24 via a spring pressure adjusting bolt 21 and a spring pressure adjusting plate 20. 40 is a predetermined message such as "Please do not lean on the door" or "Please do not press the door", or "There is a foreign object in the sill. Please remove it." It is an audio broadcasting device that broadcasts to. 50 is a foreign matter detection device that is composed of a tape switch attached to the guide groove of the door and detects that a foreign matter is caught in the guide groove, and 60 is a foreign matter detection device 50 that the foreign matter is caught in the guide groove of the door. In addition to identifying whether or not it is detected, it is identified that the switch 23 has actuated, and the audio broadcasting device
A foreign matter identification device that sends a command to 40, which is connected to the switch 23, the audio broadcasting device 40, and the foreign matter detection device 50.

Therefore, the cam link 13 and the door drive pulley 24 are connected to each other by the leaf spring 18
And the compression spring 19 are connected in the range of both spring pressures, and the engagement state is maintained unless a force that overcomes both spring pressures acts. Then, this engagement state is maintained when the door 1 is normally opened and closed. Reference numeral 23 is a switch fixed to the door drive pulley 24 corresponding to one end of the leaf spring 18.

When the door drive motor 9 starts to rotate, the power rotates the drive pulley 24 via the chain 10 in the direction of the solid line arrow, and this rotation causes the main lever 7 to move to the left by the cam link 13 and the connecting link 8 to move the door. 1 moves to the two-dot chain position in FIG. 1 and the opening operation is performed. When the drive pulley 24 rotates in the direction of the dotted arrow, the main lever 7 shifts to the illustrated state, and the door 1 is closed.

Now, when a force for blocking the opening operation of the door 1 is applied during the opening operation of the door 1 (for example, when a finger or the like is sandwiched between the door 1 and a frame body not shown), the main lever 7, The connecting ring 8 and the cam link 13 both receive the acting force. When this acting force overcomes the pressing force of the roller 14, the cam link 13
Is disconnected from the drive pulley 24. That is, the drive pulley 24 rotates, but the cam link 13 does not rotate, and the roller 14
Rolls on the surface of the groove a, and the leaf spring 18 is deformed into the state shown in FIG. The switch 23 is actuated by the deformation of the leaf spring 18, and the actuation of the switch 23 causes the motor 9 to rotate in the reverse direction upon receiving a stop and closing direction inversion command. Due to the reverse rotation of the motor 9, the door drive pulley 24 is also reversed, the engagement between the roller 14 and the groove a is returned to the original state, and the cam link 13 is reversed. The door 1 operates in the closing direction by reversing the cam link 13. Door 1
When is operated in the closing direction, a finger or the like caught between the door 1 and the frame can be removed. Door 1 which was once operated in the closing direction
Is operated again in the opening direction by a control mechanism such as a limit switch (not shown) and returns to a normal state.

On the other hand, during the closing operation of the door 1, even if a force that prevents the closing operation of the door 1 is applied, the connection between the drive pulley 24 and the cam link 13 is released as described above, and the door 23 operates the switch 23. Operates in the open direction.

By the way, when a force that prevents the opening operation of the door 1 is applied during the opening operation of the door 1, the switch 23 operates as described above. Identifies the operating state of the foreign matter detection device 50, that is, whether the foreign matter detection device 50 has detected the presence of the foreign matter in the threshold 25, and issues a command to the audio broadcasting device 40. For example, when a foreign matter is present at the threshold 25, the foreign matter detection device 50
Detects the presence of the foreign matter, and the foreign matter identifying apparatus 60 identifies that the foreign matter detecting apparatus 50 has detected the presence of the foreign matter in addition to the operation of the switch 23, and issues a command to the audio broadcasting apparatus 40. The elevator user is informed of the message that the foreign matter is present in the threshold 25. That is, the audio broadcasting device
According to 40, for example, "There is a foreign object in the threshold.
Please remove it "message is sent to the elevator users, and the users can know that the elevator is inoperable due to the presence of foreign objects in the door sill, and the foreign objects can be removed. Will be removed. As a result, it is possible to prevent a situation in which the door is repeatedly opened and closed on that floor, and the elevator cannot immediately respond to calls on other floors, and it is possible to prevent the operating efficiency of the elevator from decreasing.
Further, when there is no foreign object at the threshold 25, the foreign object identifying apparatus 60 identifies that the foreign object detecting apparatus 50 has not detected the presence of the foreign object in addition to the switch 23 being operated, and the audio broadcast. A command is issued to the device (40) to notify the elevator user of a message not to approach the door. As a result, the audio broadcasting device 40 broadcasts a message to the user, for example, "Please do not lean on the door" or "Please do not press the door", and the user holding the door or leaning on it. Is alerted to. Although the above description has been made mainly for the door opening operation, the door closing operation is also performed in the same manner as the above-mentioned door opening operation, and therefore detailed description will be omitted.

[Effect of device]

As apparent from the above description, in the present invention, in particular, the foreign matter detection means, the notification means, and the foreign matter identification means are provided, and the foreign matter identification means detects that the control device has generated a driving force equal to or higher than the normal driving force. And the foreign matter detecting means identifies that the presence of the foreign matter is detected in the door sill portion, and when the foreign matter identifying means simultaneously identifies these things, a command is issued to the notification means to detect the foreign matter in the door sill portion. Since the message to the effect that it exists exists is notified, if the elevator becomes inoperable due to the presence of a foreign object in the door sill, the elevator user can know such a situation from the message. Then, the foreign matter is removed. Therefore, according to the present invention, it is possible to prevent the elevator from being stopped at a specific floor due to the presence of foreign matter in the door sill, which may lead to a decrease in the operation efficiency of the elevator. No elevator door protection device is obtained.

[Brief description of drawings]

FIG. 1 is an overall front view of an elevator car showing an embodiment of an elevator door protection device of the present invention, FIG. 2 is an enlarged view of part A of FIG. 1, and FIG. 1
It is an A section enlarged view of a figure. 1 ... Door, 2 ... Suspended vehicle, 3 ... Rail, 4 ... Car, 6 ... Link, 7 ... Main lever, 8 ... Connection link, 9 ... Door drive motor, 10 ... Chain, 11 …… fulcrum, 12 …… fulcrum, 13 …… cam link, 14 …… roller, 15
...... Roller shaft, 16 …… Roller base, 17 …… Spring support base, 18
...... Leaf spring, 19 ...... Compression spring, 20 ...... Spring pressure adjusting plate, 21
...... Spring pressure adjustment bolt, 22 ...... Compression spring support base, 23 ......
Switch, 24 ... Drive pulley, 25 ... Sill, 26 ... Door guide, 27 ... Support point, 28 ... Support point, 29 ... Support point, 30 ... Support point, 40 ... Voice broadcasting device, 50 ... Foreign object detector, 60 ...
Foreign object identification device.

Claims (1)

[Scope of utility model registration request] 1. A door driving device for automatically opening and closing a door provided at an elevator doorway, and a driving force higher than a normal driving force is generated from the door driving device during driving of the door. At this time, in the elevator door protection device having a control device having a function of detecting the generation of the driving force and stopping or reversing the driving of the door, a foreign matter detecting means for detecting the presence of a foreign matter in the door sill portion. And a notification unit that can notify the elevator user of a message that there is a foreign object in the door sill, and the presence of the foreign object in the door sill by the foreign material detection unit that has detected the driving force generation by the control device. Can be identified respectively, and when these are identified at the same time, a command is issued to the notification means to notify a message that there is a foreign object in the door sill. Protection device for an elevator door, characterized in that a and foreign material identification means.