JP3274575B2 - Elevator basket door pinch detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an object in a car door of an elevator, and more particularly to an apparatus for detecting an object in a car door of an elevator to prevent the car door from running with the object interposed therebetween.

[0002]

2. Description of the Related Art When getting into an elevator, there is a case where a bag, a bag, or the like is erroneously sandwiched by a car door. Therefore, a safety tissue is provided between a conventional elevator car door and a landing door. This safety shoe has a function of reversing the moving direction of the car door and opening the car door again when an object is caught when the car door moves in the door closing direction. As a result, the basket travels while the bag or the like is sandwiched, and the sandwiched object collides with the landing door engaging device or the basket door engaging device on the next floor, turning off the landing switch or forcing the sandwiched bag or the like. Pulling out the door closing detection switch to turn off the elevator car suddenly and causing a canning failure almost disappeared.

[0003] However, as shown in FIG. 8, when a foreign object 10 having a thickness capable of operating the car door closing detection switch is caught between the left and right car doors 1A and 1B, the car door is not opened again and the car is not opened. If the vehicle travels as it is, there is a possibility that the above-described failure may occur.

Japanese Unexamined Patent Publication No. Hei 5-319751 discloses a "safety device for an elevator car door" which includes an L-shaped pressure-sensitive safety device attached to a corner of the car door in addition to a safety tissue. Is disclosed. That is, as shown in FIG. 9, in the single-door elevator in which the safety shoe 3 is attached to the car door 1, the car door 1 contacts the rubber stopper 6 to reach the door closing end, as shown in FIG. 9. Before, car door 1 car sill 4
Is a device for re-opening the car door 1 by detecting a foreign substance, for example, a string 8 existing in the car door 1 by an L-shaped pressure-sensitive safety device 7. Here, the rubber stopper 6 is attached to the car frame 2, and the door shoe 5 at the lower end of the car door 1 is engaged with the groove of the car threshold 4, and the door shoe 5 slides in the groove of the car threshold 4. The car door 1 moves left and right.

The operation of the car door safety device will be described with reference to FIG.

First, the car door is started to move in the door closing direction (S101). Continue to close the car door (S1
02), it is determined whether or not the door closing movement has been prevented for a certain period of time (generally about 8 seconds) (S103). If the door closing movement is prevented for a certain period of time, it is further determined whether a foreign object is caught in the car door and a force in the opening direction is applied according to the output of the pressure-sensitive safety device (S104). If the force in the opening direction is acting, the movement of the car door in the door closing direction is reversed (S201), and the car door is fully opened (S2).
02). Then, the door is opened during the non-interference time (generally about 4 seconds) (S203). Thereby, the passenger in the car cabin can remove the string of the car sill within the non-interference time. Thereafter, the door closing operation is performed again, and the car is run.

In the operation of the elevator thereafter, the door is closed (S105), and the electric door is switched to the mechanical door closed by the weight of the weight of the door closing device (S10).
6) In consideration of the allowance for the car door in the closed state, the car door is closed until the elevator can safely operate (S107 to S108) and a car start command is issued (S107).
200).

[0008]

However, the car door safety device described above is difficult to apply to a double door elevator. Further, since the pressure-sensitive safety device is linked to the safety tissue, it is difficult to use the safety device except for an elevator having the safety tissue. Furthermore, there is a problem that it is not effective for obstacles thinner than the allowance of the car door in the closed state.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to pinch a car door of an elevator to prevent the car door from running with a thin wall that cannot be detected by a safety tissue. A detection device is provided.

[0010]

Means for Solving the Problems In order to solve the above-mentioned problems, an apparatus for detecting an object in a car door of an elevator according to the present invention has the following features.

(1) An object pinch detection plate attached to the inside of one of the car doors so as to protrude and move and having a length substantially equal to the length of the closed end of the car door, and the object pinch detection plate provided inside the other car door. An object pinch detection plate actuating means disposed in the one car door and for projecting the object pinch detection plate in the direction of closing the car door when the car door is closed, and the object pinch detection Detecting means for detecting that the plate has contacted a foreign object caught between the cage doors.

[0012]

( 2 ) In the device for detecting a pinch of a car door of an elevator according to the above (1 ) , further, a car door re-opening means for opening the car door when the detecting means detects that a foreign object has been pinched. Have.

( 3 ) In the device for detecting an object jam of a car door of an elevator according to the above (1 ), the object jam detection plate operating means is such that an intermediate shaft portion is rotatably fixed to the basket door. An operation arm for suspending the detection plate, a suction plate attached to the tip of the operation arm for magnetic attraction, and a suction plate provided on the car door for sucking the object pinch detection plate in the basket door And a projecting excitation coil that is provided on the car door and that sucks the suction plate to protrude the object pinch detection plate from the car door.

( 4 ) In the device for detecting a pinch of a car door of an elevator according to the above (1 ), the detecting means is connected to a fixed contact fixed to the car door and a plate for detecting a pinch of the object. A movable contact that slides when the pinch detection plate projects and comes into contact with the fixed contact; and a determination unit that determines that a foreign object has been caught in the basket door if the movable contact does not contact the fixed contact.

[0016]

According to the apparatus for detecting a pinch of a car door of an elevator according to the present invention having the above-described structure , a means for detecting a pinch of a car having a vertical width substantially equal to the length of a closed end of a car door in a double door elevator. As a result, the object pinch detection plate reciprocates on the contact surfaces of the two car doors when the door is closed, so that even when a thin foreign object is pinched, it can be easily detected as an object pinch. For this reason, the car can be satisfactorily operated without the car traveling with the object sandwiched therebetween.

[0017]

Further, since there is provided a car door re-opening means for opening the car door when it detects that a foreign object has been interposed, even if the car door interposes an object even in an elevator having no safety tissue, the car door can be easily opened. Can be opened. For this reason, the car can be satisfactorily operated without the car traveling with the object interposed therebetween.

The object pinch detection plate operating means magnetically attracts the suction plate at the tip of an operation arm attached to the upper end of the object pinch detection plate by exciting the projecting excitation coil when the door is closed. The object pinch detection plate can be made to protrude in the door closing direction. On the other hand, when the object pinch detection plate is stored in the basket door, by exciting the storage excitation coil, the suction plate at the tip of the operating arm attached to the upper end of the object pinch detection plate is magnetically attracted, The object pinch detection plate can be stored inside the car door. Thus, the object pinch detection plate can be protruded and moved between the car doors or between the car door and the car frame when the car door is closed.

The detecting means for detecting that the object pinch detection plate has contacted a foreign object pinched by the car door includes a fixed contact fixed to the car door and a pinch detection plate connected to the object pinch detection plate. A movable contact that slides when protruding and comes into contact with the fixed contact;
If the movable contact does not come into contact with the fixed contact, the determination unit determines that the foreign matter is caught in the basket door, so that the object can be easily detected.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a view for explaining the structure of an apparatus for detecting a jam of an elevator car door according to the present invention. FIG.
It is a figure explaining the state where the thing pinch detection device of the car door of the elevator concerning the present invention projected from the inside of the car door. Also,
FIG. 3 is a cross-sectional view along the line X ₁ -X _{2 of} FIG. 2, and FIG. 4 is a cross-sectional view along the line Y ₁ -Y ₂ . Further FIG.
FIG. 3 is a sectional view taken along line Z ₁ -Z ₂ in FIG. FIG.
FIG. 3 is a view of the state of the object pinch detection plate in the door-closed state of the object pinch detection device according to the present invention as viewed from the landing side. FIG.
5 is a flowchart illustrating the operation of the elevator door jam detection device and the elevator according to the present invention. The same components as those of the conventional elevator are denoted by the same reference numerals, and description thereof will be omitted.

First, the structure of a device for detecting an object in a car door of an elevator will be described.

FIG. 1 shows a state in which the car door is open. As shown in FIG. 1, an object sandwiching detection plate 11 formed of a lightweight material such as plastic or aluminum is provided inside the left basket door 1A. The operating arm 13 is
The intermediate shaft portion is rotatably fixed to the left basket door 1A, and one end thereof is connected to the object pinch detection plate 11 so as to suspend the object pinch detection plate 11. On the other hand, the other end of the operation arm 13 is provided with a suction plate 12 for magnetic suction. Further, the interlocking arm 14 is rotatably supported inside the left basket door 1A with one end thereof as a fulcrum, and suspends the object sandwiching detection plate 11 like the operating arm 13.

The object pinch detection plate 11 is pulled in the door opening direction by a pull spring 16 attached to a pull spring fixing plate 15 fixed inside the left basket door 1A.

The projecting excitation coil 19 is disposed on the left car door 1A at a position where the object pinch detecting plate 11 protrudes from the car door when the suction plate 12 is sucked. The terminal 20 is a terminal for the exciting coil 19 for projection. On the other hand, the storage excitation coil 17 is disposed on the left basket door 1A at a position such that the object pinch detection plate 11 is stored in the left basket door 1A when the suction plate 12 attached to the work arm 13 is sucked. Is done. Terminal 1
Reference numeral 8 denotes a terminal for the storage excitation coil 17. When the car door is open as shown in FIG.
Is stored in the basket door, the storage exciting coil 17 is excited, and the suction plate 12 is sucked.

Further, a flexible contact support arm 21 to which an L-shaped movable contact 23 is connected is attached to the side surface of the tail end of the object pinch detection plate 11. Object pinch detection plate 1
When 1 moves, the movable contact 23 is guided by the movable contact guide plate 22 fixed to the left cage door 1A and slides in the door opening and closing direction. On the other hand, a fixed contact 24 is attached to the left basket door 1A. The output terminal 25 fixed to the left car door 1A is connected to the fixed contact 24 and the movable contact 23 via the flexible electric wire 26.
Next, with reference to FIG. 2, a description will be given of the detection of an object being pinched when the car door is closed. In addition, the part shown by the broken line is
The state at the time of storage is shown.

The right car door 1B is formed with a groove 27 (a portion shown by a dashed line) which is engaged when the object sandwiching detection plate 11 protrudes, and this groove 27 is formed from the upper end of the right car door 1B. It is formed over the lower end.

At the same time that the car door is closed, the excitation of the storage excitation coil 17 is released, and the projection excitation coil 19 is excited.
It is sucked in the direction of 9. As a result, the operating arm 13 rotates about the central axis of the operating arm 13, and the object pinch detection plate 11 is raised and protrudes from the left basket door 1A. At this time, the interlocking arm 14 also rotates about the fixed axis as a fulcrum while suspending the object sandwiching detection plate. FIG. 3 shows the state of the suction plate 12 and both excitation coils at this time.

When there is no foreign matter between the car doors, the object pinch detection plate 11 protrudes in the door closing direction, the movable contact 23 comes into contact with the fixed contact 24 and conducts, and a signal is output from the output terminal 25. The state at this time is shown in FIG. On the other hand, when there is a foreign substance between the car doors, no signal is output because the movable contact 23 does not contact the fixed contact 24.

When the object pinch detection plate 11 is protruding, the extension spring 16 attached to the extension spring fixing plate 15
When the excitation of the projecting excitation coil 19 is released, the object pinch detection plate 11 is pulled back into the basket door by the force of the pull spring 16 and stored. FIG. 5 shows the state at this time.

FIG. 6 shows the positional relationship among the object detection plate, the car door, and the safety shoe when the door is closed. FIG.
As shown in (2), both basket doors and both safety shoes have a play allowance when the doors are closed. Therefore, as described above, if the object pinch detection plate 11 reciprocates on the contact surfaces of the two car doors, it is possible to detect even the pinch of a thin foreign substance. The left car door 1A and the right car door 1B slide left and right on the car sill 4 by door hangers 36 hooked on door rails 35 fixed to both ends of the car room.

Next, the operation of the object jam detection device and the elevator will be described with reference to the flowchart of FIG. The same operations as those in the related art are denoted by the same reference numerals, and description thereof will be omitted.

The car door is moved in the door closing direction (S101).
-S105), it is checked whether the door position switch for switching from electric door closing to mechanical door closing by the weight of the door closing device is operated (S106). When the door is mechanically closed, the exciting coil 17 is excited, the object-carrying detection plate 11 is made to project, and foreign matter between the car doors is checked (S301). Next, after the coil excitation is completed, it is determined whether or not the movable contact 23 comes into contact with the fixed contact 24 and becomes conductive, and a signal is output from the output terminal 25 (S302). When there is an output from the output terminal 25, the excitation coil 19 for storage is excited, and
Is stored (S303). On the other hand, when there is no output from the output terminal 25, the movement of the car door in the door closing direction is reversed (S201), and the car door is fully opened (S202). Then, the door is opened during the non-interference time (generally about 4 seconds) (S203). Therefore, during this non-interference time, the passenger in the car room can remove the foreign matter caught between the car doors.

[0035]

As described above, according to the device for detecting an object jam of a car door of an elevator according to the present invention, in an elevator with double doors, when the object jam detection plate is closed by the object jam detection plate operating means, the two car doors are closed. Reciprocatingly moves on the contact surface, so that even when a thin foreign substance is caught, it can be easily detected as a pinched object. For this reason, the car can be satisfactorily operated without the car traveling with the object interposed therebetween.

[0036]

Further, since there is provided a car door re-opening means for opening the car door when it detects that a foreign object has been interposed, even if the car door interposes an object even in an elevator without a safety tissue, the car door can be easily opened. Can be opened. For this reason, the car can be satisfactorily operated without the car traveling with the object sandwiched therebetween.

Further, the object pinch detection plate operating means magnetically attracts the suction plate at the tip of the operating arm attached to the upper end of the object pinch detection plate by exciting the exciting coil when the door is closed. The object pinch detection plate can be made to protrude in the door closing direction. On the other hand, when the object pinch detection plate is stored in the basket door, by exciting the storage exciting coil, the suction plate at the tip of the operating arm attached to the upper end of the object pinch detection plate is magnetically attracted, The object pinch detection plate can be stored inside the car door. Thus, the object pinch detection plate can be protruded and moved between the car doors or between the car door and the car frame when the car door is closed.

The detecting means for detecting that the object pinch detection plate has contacted a foreign object caught in the car door includes a fixed contact fixed to the car door and a pinch detection plate connected to the object pinch detection plate. A movable contact that slides when protruding and comes into contact with the fixed contact;
If the movable contact does not come into contact with the fixed contact, the determination unit determines that the foreign matter is caught in the basket door, so that the object can be easily detected.

As described above, according to the present invention, even if a bag or the like is mistakenly sandwiched between the basket door and a thin thing such as a string or the like which causes the door closing detection switch to operate, the bag or the like can be used. A car door engaging device collides with the landing door engaging device on the next floor due to the car traveling and being pinched while being sandwiched, and the door closing detection is made by turning off the switch on the hall or forcibly pulling out the sandwiched bag etc. By turning off the switch, it is possible to prevent the elevator car from suddenly stopping and causing a canning failure.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an apparatus for detecting an object sandwiching a car door of an elevator according to the present invention.

FIG. 2 is a view for explaining a state in which the device for detecting a pinch of a car door of an elevator according to the present invention protrudes from the inside of the car door.

FIG. 3 is a sectional view taken along the line X ₁ -X _{2 in} FIG. 2;

FIG. 4 is a sectional view taken along the line Y ₁ -Y ₂ .

FIG. 5 is a sectional view taken along the line Z ₁ -Z _{2 in} FIG. 2;

FIG. 6 is a diagram showing the state of the object pinch detection plate in the door-closed state of the object pinch detection device according to the present invention as viewed from the landing side.

FIG. 7 is a flowchart illustrating the operation of the elevator door jam detection device and the elevator according to the present invention.

FIG. 8 is a diagram showing a failure occurrence state that cannot be prevented by a conventional technique.

FIG. 9 is a diagram illustrating a configuration of a conventional car door safety device.

FIG. 10 is a flowchart illustrating the operation of a conventional car door safety device.

[Explanation of symbols]

1A left car door, 1B right car door, 11 object detection plate, 12 suction plate, 13 operating arm, 14 interlocking arm, 15 extension spring fixing plate, 16 extension spring, 17 storage exciting coil, 18 terminals, 19 projecting Excitation coil, 20 terminals, 21 contact support arm, 22 movable contact guide plate, 23
Movable contacts, 24 fixed contacts, 25 output terminals, 26 flexible wires, 27 grooves.

Continuation of the front page (56) References JP-A-6-227781 (JP, A) JP-A-5-8977 (JP, A) JP-A-5-330772 (JP, A) JP-A-5-95969 (JP, A) , U) Japanese Utility Model Showa 50-48362 (JP, U) Japanese Utility Model Showa 62-44883 (JP, U) Japanese Utility Model Showa 31-6739 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB (Name) B66B 13/26

Claims (4)

(57) [Claims] 1. An object pinch detection plate which is attached to the inside of one of the car doors so as to protrude and move and has substantially the same vertical width as the length of the closed end of the car door, and the object pinch detection plate provided inside the other car door. An engaging groove, an object pinch detection plate actuating means disposed in the one car door and configured to protrude the object pinch detection plate in a direction of closing the car door when the door is closed, and the object pinch detection plate And a detecting means for detecting that the vehicle has contacted a foreign object caught between the car doors. 2. The device for detecting an object jam of a car door of an elevator according to claim 1 , further comprising a car door re-opening means for opening the car door when the detecting means detects that a foreign object is interposed. An object detection device for a car door of an elevator. 3. The device for detecting an object pinch of an elevator car door according to claim 1 , wherein the object pinch detection plate operating means has an intermediate shaft portion rotatably fixed to the car door. An operating arm for suspending the operating arm; a suction plate attached to the tip of the operating arm for magnetic suction; and a housing provided on the car door for sucking the suction plate for housing the object pinch detection plate in the car door. An excitation coil provided for the car door, and a projecting excitation coil for sucking the suction plate for projecting the object sandwiching detection plate from the car door, comprising: Detection device. 4. The object pinch detection device for an elevator car door according to claim 1 , wherein the detection means is connected to a fixed contact fixed to the car door and the object pinch detection plate to detect the object pinch. An elevator, comprising: a movable contact that slides when the plate is projected to come into contact with the fixed contact; and a determination unit that determines that a foreign object is caught in the cage door if the movable contact does not contact the fixed contact. Detector for pinch of basket door.