JP5581763B2 - Elevator door safety device - Google Patents

Description

  The present invention relates to a safety device for an elevator door that prevents foreign objects from being drawn in between the door of the elevator and an entrance / exit frame.

Since there is a slight gap between the door of the elevator and the entrance / exit frame, there is a possibility that the user's fingers and foreign objects are drawn into this gap when the door is opened. For this reason, it is necessary to quickly detect that the foreign object has been drawn.
Therefore, in order to solve this problem, the foreign matter is drawn by detecting a change in the load of the door driving device that occurs when the foreign matter is drawn into the gap, specifically, an increase in the current value generated in the door motor. An apparatus for detecting this is considered.

  4 to 9 are examples of an elevator door safety device (see Patent Document 1), FIG. 4 is a perspective view showing the main part of the elevator hall, FIG. 5 is a plan view of FIG. 4, and FIG. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6, FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 6, and FIG.

  In the figure, 1 is an elevator door, 2 is a door hanger for hanging the door 1, and 3 is an entrance / exit frame. The door safety device that detects the entry of foreign matter includes a main driving member 5 having an L-shaped cross section that is movable in the opening / closing direction of the door 1 with respect to the entrance / exit frame 3, and an upper end surface and a lower side of the main driving member 5. The cam member 4 is fixed to both end surfaces of the end surface, moves in the opening / closing direction of the door 1 together with the main driving member 5, and is engaged with the cam hole 4 c according to the movement of the cam member 4. A driven member 10 having an L-shaped cross section that moves between the door 1 and the entrance / exit frame 3 in a direction perpendicular to the opening / closing direction of the door 1 by a fourth pin 9 that is a combined engaging portion, and the driven member 10 And a load detecting device (not shown) for detecting a load of a door motor (not shown) that is a drive source of the door 1 and inverting the door motor. The main driving member 5 and the driven member 10 are made of aluminum for weight reduction.

  In addition to the cam hole 4c, the cam member 4 is provided with a first hole 4a extending in parallel with the door 1, a second hole 4b, and a third hole 4d. A first pin 6 penetrating the third hole 4d is erected on the upper end surface and the lower end surface of the main moving member 5, and the first pin 6 penetrating the first hole 4a is formed on the upper end surface and the lower end surface of the entrance / exit frame 3. Two pins 7 and a third pin 8 that floats in the second hole 4b are provided upright.

Between the main driving member 5 and the entrance / exit frame 3, a plurality of springs 12 for urging the main driving member 5 in the door closing direction of the door 1 (right direction in FIG. 5) are provided at equal intervals in the vertical direction. In addition, as shown in FIG. 8, a plurality of guides 14 for main driving members having a T-shaped cross section are provided in the entrance / exit frame 3 at equal intervals in the vertical direction, and the main driving member 5 opens and closes the door 1 by these guides 14. Guided in the direction.
In addition, as shown in FIG. 7, the driven member 10 is provided with a plurality of driven member guides 13 having a T-shaped cross section at equal intervals in the vertical direction. Guided in the direction perpendicular to the opening and closing direction.

  When a foreign matter is drawn between the door 1 and the entrance / exit frame 3, the door motor causes a larger current than usual to maintain a predetermined rotational speed. The load detection device detects this current value, and when the current value exceeds a predetermined value, it reverses the rotation direction of the door motor and reverses the door 1 in the door closing direction.

In the apparatus, when a foreign object is drawn between the door 1 and the entrance / exit frame 3 while the door 1 is moving in the door opening direction, the main driving member 5 resists the elastic force of the spring 12 and opens the door. As a result, the cam member 4 also moves in the door opening direction. As the cam member 4 moves in the door opening direction, the driven member 10 is guided by the cam hole 4 c engaged with the fourth pin 9 erected on the driven member 10 and moves in the direction of the door 1. As shown in FIG. 9, the friction member 11 collides with the surface of the door 1.
As a result, the door 1 is prevented from moving in the door opening direction, and a large current flows through the door motor. The load detection device detects this large current and reverses the door motor. As a result, the door 1 is inverted and closed, so that foreign objects are prevented from being drawn in.

Japanese Patent Laid-Open No. 2004-210525

  In the prior art, the cam member 4 is fixed to the upper and lower end faces of the main driving member 5 and the driven member 10 is moved through these gum members 4, so that the number of parts increases and the configuration becomes complicated. Further, in general, the finger of the user is drawn in the vicinity of the middle of the main driving member 5. For this reason, there is a problem that even if a foreign object such as a finger is drawn near the middle portion of the long main driving member 5, the main driving member 5 may bend and the upper and lower cam members 4 may not move smoothly.

The present invention includes an entrance / exit frame constituting an entrance / exit of an elevator, a door that opens and closes with a gap from the entrance / exit frame, a door motor that drives the door, and a device that detects a load of the door motor. A support body provided with a guide portion provided on the entrance / exit frame and having an inclination in which the door opening side approaches the door side and the door closing side leaves the door side, and the door can be moved in the opening / closing direction along the guide portion And an operating body having a configuration in which the opposing plane facing the door and a surface pushed in the door opening direction by a foreign object and the both surfaces are not displaced relative to each other , and the operating body and the support body are connected, and a biasing device for biasing the operating member in the door-closing direction, to move the door open direction the working body along the guide portion, the load of the door motor by the opposed plane comes into contact with the door A safety device for an elevator door, characterized in that this be increased is configured to detect by the load detecting device.
Further, the present invention is characterized in that the guide portion is formed in the entrance / exit frame.

Furthermore, the present invention includes an entrance / exit frame that constitutes an entrance / exit of the elevator, a door that opens and closes with a gap from the entrance / exit frame, a door motor that drives the door, and a device that detects a load of the door motor. The vertical axis provided in the entrance / exit frame, the rotary body configured separately from the entrance / exit frame and pivotally attached to the shaft , provided on the door side of the rotary body , A friction member having an opposing flat surface and a surface pushed in the door opening direction by a foreign object, and a biasing device connected to the entrance / exit frame side and the rotating body and biasing the friction member in the door closing direction. The friction member side of the rotating body rotates in the door opening direction, and the load of the door motor increases when the opposed plane comes into contact with the door, and this is detected by the load detection device. Special It is a safety device for an elevator door to.

  According to the present invention, the structure is simpler than that of the conventional apparatus, and a reliable operation can be performed.

It is a figure which shows the outline of the safety device of the elevator door by embodiment of this invention. It is a figure which shows the outline of the safety device of the elevator door by other embodiment of this invention. It is a figure which shows the outline of the safety device of the elevator door by other embodiment of this invention. It is a perspective view which shows the principal part of the hall provided with the safety device of the conventional elevator door. FIG. 5 is a plan view of FIG. 4. FIG. 6 is a plan sectional view of FIG. 5. It is VII-VII sectional drawing of FIG. It is VIII-VIII sectional drawing of FIG. It is a plane sectional view at the time of a safety device operation of a door.

An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic view showing a safety device for an elevator door, and corresponds to FIG.
In the figure, the same reference numerals as those in FIG. 6 denote the same components. Reference numeral 20 denotes a support fixed to the entrance / exit frame 3, and a guide portion 21 inclined to the door 1 side is formed. Reference numeral 22 denotes an operating body movable along the guide portion 21, and 23 denotes a spring (biasing device) provided between the support body 20 and the operating body 22, and the operating body 22 is closed in the door closing direction (FIG. 1). To the right). Reference numeral 24 denotes a stopper that restricts movement of the operating body 22 in the door closing direction. The springs 23 are installed at a plurality of locations in the vertical direction, and a part of the support body 20 and the operating body 22 in the vicinity of the installation positions of these springs 23 is omitted in order to install the springs 23.

In this apparatus, when a foreign object is drawn between the door 1 and the entrance / exit frame 3 while the door 1 is moving in the door opening direction, the operating body 22 resists the elastic force of the spring 23 and opens the door. To contact the surface of the door 1.
As a result, the door 1 is prevented from moving in the door opening direction, and a large current flows through the door motor. The load detection device detects this large current and reverses the door motor. As a result, the door 1 is inverted and closed, so that foreign objects are prevented from being drawn in.

  Thus, according to the present embodiment, the same effect can be obtained with a simple configuration as compared with the conventional apparatus. In addition, since the operating body 22 is in direct contact with the door 1, the operating body is not bent and the operation is not uncertain as in the conventional apparatus.

  FIG. 2 is a view showing another embodiment of the present invention, in which a guide portion 21 a is formed in the entrance / exit frame 3. Further, a spring 23a is provided between the guide portion 21a and the operating body 22a. The operation is the same as in the embodiment of FIG.

  FIG. 3 is also a diagram showing another embodiment of the present invention, wherein an entrance / exit frame 3 is provided with a shaft 30 in the vertical direction, a rotating body 31 is pivotally attached to this shaft, and a rubber is attached to the door 1 side of the rotating body 31. A friction member 32 such as is attached. Reference numeral 33 denotes a support fixed to the entrance / exit frame 3, and 34 denotes a spring provided between the support 33 and the rotating body 31. The rotating body 31 is rotated counterclockwise in FIG. 3, that is, the friction member 32 is closed to the door 1. It is biased in the direction (right direction in FIG. 3). Reference numeral 35 denotes a stopper for restricting the rotation of the rotating body 31 in the counterclockwise direction.

In this embodiment, when a foreign object is drawn between the door 1 and the entrance / exit frame 3 while the door 1 is moving in the door opening direction, the friction member 32 moves in the door opening direction while rotating clockwise. Then, it contacts the surface of the door 1.
As a result, the door 1 is inhibited from moving in the door opening direction, and a large current flows through the door motor, and the load detection device detects the large current and reverses the door motor. As a result, the door 1 is inverted and closed, and foreign objects are prevented from being drawn in.

  In each of the embodiments described above, an appropriate number of springs may be installed in the vertical direction, and an alarm sound or the like may be generated when a large current is detected by the load detection device. Furthermore, in the embodiment of FIGS. 1 and 2, it is desirable that at least the door 1 side of the operating bodies 22 and 22a be a friction material having a high friction coefficient.

DESCRIPTION OF SYMBOLS 1 Door 3 Entrance / exit frame 20,33 Support body 21,21a Guide part 22,22a Actuator 23,23a, 34 Spring (biasing device)
24 and 35 the stopper 30 the shaft 31 the rotating body 32 friction member

Claims (3)

In what is provided with an entrance / exit frame that constitutes an entrance / exit of the elevator, a door that opens and closes with a gap from the entrance / exit frame, a door motor that drives the door, and a device that detects the load of the door motor,
Movable a support door open side provided in the doorway frame close to door closing side to the door side is provided with a guide portion having an inclined away from the door, the opening and closing direction of the door along the guide portion And an operation body having a facing plane facing the door and a surface pushed in the door opening direction by a foreign object, and the both surfaces are not relatively displaced , and connected to the operation body and the support body, An urging device for urging the body in the door closing direction;
If the load of the door motor increases when the operating body moves in the door opening direction along the guide and the opposed plane comes into contact with the door, the load detecting device detects the load. Elevator door safety device.   The safety device for an elevator door according to claim 1, wherein the guide portion is formed in the entrance / exit frame. In what is provided with an entrance / exit frame that constitutes an entrance / exit of the elevator, a door that opens and closes with a gap from the entrance / exit frame, a door motor that drives the door, and a device that detects the load of the door motor,
A vertical shaft provided in the entrance / exit frame, a rotating body configured separately from the entrance / exit frame and pivotally attached to the shaft , provided on the door side of the rotating body, and opposed to the door A friction member having a facing plane and a surface pushed in the door opening direction by a foreign object, and a biasing device connected to the entrance / exit frame side and the rotating body and biasing the friction member in the door closing direction. Prepared,
If the load of the door motor increases when the friction member side of the rotating body rotates in the door opening direction and the opposed plane comes into contact with the door, the load detecting device detects this. Elevator door safety device.

Images