JP2004137039A - Door opening and closing device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator pulling-in prevention device causing any problem with designability, eliminating the need of adjusting operation, and not consuming electric power. <P>SOLUTION: This door opening and closing device comprises a wire 13 having one end fixed to a beam 6 through a pulley 14 fitted to a door hanger 8 suspending a car door 3 and the other end fixed to a spacer 10. By this, when a door 3 is opened and closed, the spacer 10 is vertically moved. Also, the spacer 10 is formed in such a shape that can hold the legs 4 of the door, and the length of a wire 13 is set so that the spacer 10 is positioned for holding the legs 4 when the car door 3 is fully closed. With this structure, when the car door is fully closed, the spacer 10 holds the legs 4, and while the door is opening and closing, the spacer 10 is raised and lowered and the legs 4 are not supported on the spacer 10. In this case, the car door 3 is pressed with an external force by a hand to tilt the car door 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an elevator door opening / closing device provided with a pull-in prevention mechanism.
[0002]
[Prior art]
There are many user disasters such as being pulled in when opening and closing an elevator door as shown in FIG. This is because the user 20 keeps the hand 21 on the door 3 when the door is opened, and can be prevented by the user getting on and off with care. Etc. refers to an accident that is drawn between the door 3 and the car or the pillar of the hall). However, there are also very high demands on manufacturers to prevent these accidents as equipment.
[0003]
In order to solve such a problem, as a conventional example 1, an elevator door safety device as shown in FIG. 7 (for example, see Patent Document 1) is known.
[0004]
[Patent Document 1]
JP-A-8-040677 (column 3, lines 29-44, FIG. 1)
[0005]
In the first conventional example, the photoelectric devices 75 and 76 are embedded on both sides of the vertical column 2 of the car entrance, and when the user approaches the car door 73, the light beam from the light projecting unit 75 of the photoelectric device is cut off. The unit (not shown) detects the approach of the user by the light receiving unit 76, drives the speaker 78, and emits a prepared message as an alarm. Further, when the user approaches and touches the car door 73, the detection sensor 77 detects that the car door 73 has been touched, and the control device drives an alarm device (not shown) to blink the alarm lamp 79. Therefore, it is possible to call attention to prevent a user's hand from being caught in the gap between the car door 73 and the upright pillar 72 when the car door 73 is opened.
[0006]
Further, as a second conventional example, an elevator door retracting prevention device as shown in FIG. 8 (for example, see Patent Document 2) is known.
[0007]
[Patent Document 2]
JP-A-8-113451 (col. 2, lines 21-29, FIG. 3)
[0008]
In this prevention device, a spring 89, an electromagnet 90 and a plunger 91 are provided inside the second car door 2, and a car door panel 88 is provided on the surface. The spring 89 urges the car door panel 88 inside the second car door 82. When the electromagnet 90 is excited, the plunger 91 pushes the cage door panel 88 downward in the drawing. By exciting the electromagnet 90 immediately before the cage door opens, the user's hand 83 is pushed, and the user can detect the door opening in advance and release the hand.
Thus, it is possible to prevent an accident in which the user's hand is drawn into the gap between the elevator doors.
[0009]
[Problems to be solved by the invention]
However, in the above conventional example 1, there is a problem that the embedding of the photoelectric device in the vertical column of the entrance and exit of the car is poor in designability, and the adjustment workability for aligning the light emission and light reception at the time of mounting and replacing the photoelectric device is also poor. Was.
[0010]
Further, in the above-mentioned conventional example 2, there is a problem in that such an elevator retracting prevention device consumes electric power because it is electrically driven.
[0011]
SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator pull-in prevention device that has no problem in design, requires no adjustment work, and consumes no power.
[0012]
[Means for Solving the Problems]
An elevator door opening / closing device according to the present invention includes a door leg movably attached to a lower end of a door via a spring, the door leg being engaged with the door leg when the door is fully closed. And a spacer for restricting the movement in the front-rear direction.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 6 is a schematic view showing the mounting of the legs 4 of the door provided below the conventional car door 3.
[0014]
In the present invention, the car door 3 and the legs 4 of the door are not fixed by the screws 15 as shown in FIG.
[0015]
As shown in FIG. 1, the car door 3 is fixed to a door hanger 8, and the mass of the car door 3 is supported by a door rail 7 via a hanger roller 9 provided on the door hanger 8. Since the center of gravity 3a of the car door 3 does not coincide with the contact point 16 between the door rail 7 and the hanger roller 9 in the plane direction, a moment A17 is generated.
On the other hand, the compression spring 4b is arranged below the car door 3 so that the car door 3 is supported without being inclined with respect to the acting force B18 generated by the moment A17. As a result, as long as no external force acts on the car door 3, the car door 3 can be maintained in a state where it does not tilt.
[0016]
Further, as shown in FIG. 2, when a user or the like pushes the car door 3 from inside the car room 1, the car door 3 is inclined toward the hall. Therefore, when the external force 19 does not act on the car door 3 at the time of opening / closing, the car door 3 is opened / closed without tilting, and when the user pushes the car door 3, the car door 3 tilts to the hall side. For example, when the door is opened, the gap between the car door 3 and the car doorway pillar 2 becomes large, so that even if a user's hand or the like is caught between the car door 3 and the doorway pillar 2, the hand that has been caught easily comes off.
Further, by providing the tilt adjustment bolt 4c, the gap between the bolt head and the car door 3 can be adjusted. Thereby, the car door 3 can be prevented from being excessively overturned, and the interference with the hoistway equipment and the engagement relationship between the car and the engaging device provided in the landing can be secured.
[0017]
On the other hand, the above structure is a structure in which the car door 3 can be operated by pushing the car door 3, and when the elevator is moved up and down, for example, when the car door is pushed from the car room by an external force 19, a hoistway such as a hall threshold on the hall side. It may interfere with the equipment and cause damage to the equipment. Therefore, as shown in FIGS. 3 and 4, a wire 13 having one fixed to the spar 6 and the other fixed to the spacer 10 is provided via a pulley 14 attached to a door hanger 8 hanging the car door 3. Thus, the opening and closing of the car door 3 allows the spacer 10 to move up and down. Further, the spacer 10 is formed in such a shape as to grip the leg mounting metal 4a of the door, so that the spacer 10 is at a position where the spacer 10 grips the mounting metal 4a as shown in FIG. 3 when the car door 3 is fully closed. Is set to the wire 13.
With this structure, the spacer 10 grips the mounting metal 4a when fully closed, and the mounting metal 4a is not supported by the spacer 10 during opening / closing because the spacer 10 moves up and down. Can tilt.
[0018]
During normal use, the car door 3 can be opened and closed only when landing on each floor. Since the car door 3 does not open and close while the elevator is moving up and down, the car door 3 can be opened and lowered by the elevator inside the car room 1 by this structure. Even when an external force 19 is applied from above, it does not tilt, and can be tilted only during opening and closing. As a result, the hand or the finger pinched by the retraction is easily pulled out during opening / closing, and the car door 3 does not tilt during the ascent / descent, so that damage due to interference with the equipment on the hoistway does not occur.
[0019]
As described above, according to this embodiment, the leg of the door movably attached to the lower end of the door via the spring, and engages with the leg of the door when the door is fully closed. By providing the spacer for restricting the movement of the leg in the front-rear direction, the door is movable in the front-rear direction during the opening and closing operation of the door. On the other hand, in the fully closed state, the door does not move even when the elevator moves up and down because the spacer is engaged and the door does not move in the front-back direction. Further, since the photoelectric device is not required, the problem of the design property and the problem of the complicated adjustment work, which are the problems of the first conventional example, are also solved. Further, since the operation is performed not by an electric system but by a mechanical system, the problem of power consumption can be solved.
[0020]
Further, since a mechanism for driving the spacer by the opening and closing operation of the door is provided, the mechanism is interlocked with the opening and closing operation of the door, so that the reliability is high.
[0021]
Also, a wire and a pulley are provided, one end of the wire is fixed to a fixed frame of a door opening and closing device, the spacer is connected to the other end of the wire, and the door is opened and closed via the pulley around which the wire is wound. Since a mechanism for converting the opening and closing operation of the device into an up and down operation of the spacer is provided, in conjunction with the opening and closing operation of the door, when the door is fully closed, the spacer is lowered to the lower end and engages with the door leg, and the door is opened. The door does not rattle because it regulates the movement in the front-rear direction. From the time when the door is opened until the door is fully opened, the spacer is raised and disengaged from the legs of the door, so that the door is movable in the front-rear direction, and it is easy to remove even if a finger is pulled in.
[0022]
Note that the same structure can be applied to the landing on the landing side, and the same effect can be obtained.
[0023]
【The invention's effect】
A door leg movably attached to the lower end of the door via a spring in the front-rear direction, and a spacer that engages with the door leg when the door is fully closed and regulates the front-rear movement of the door leg. Since the door is movable in the front and rear direction during the opening and closing operation of the door, it is easy to remove even if a finger is pulled in. On the other hand, in the fully closed state, the door does not move even when the elevator moves up and down because the spacer is engaged and the door does not move in the front-back direction. Further, since the photoelectric device is not required, the problem of design and the problem of complicated adjustment work can be solved. Further, since the operation is performed not by an electric system but by a mechanical system, the problem of power consumption can be solved.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of the present invention (when no external force acts).
FIG. 2 shows Embodiment 1 of the present invention (when an external force acts).
FIG. 3 is a second embodiment of the present invention (a detailed view of a lower portion of the door when fully closed).
FIG. 4 is a front view of the second embodiment of the present invention (when fully closed and fully opened).
FIG. 5 is a schematic view of a cab doorway. FIG. 6 is a view showing an example of mounting legs of a conventional door.
FIG. 7 is a conceptual diagram showing Conventional Example 1.
FIG. 8 is an overall view of a door safety device of Conventional Example 2.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Car room 2 Car doorway column 3 Car door 3a Car door center of gravity 4 Leg 4a of door 4 Door mounting metal 4b Compression spring 4c Fall adjustment bolt 5 Sill 6 Girder 7 Car door rail 8 Door hanger 9 Hanger roller 10 Spacer 11 End 1
12 End 2
13 Wire 14 Pulley 15 Screw 16 Contact 17 Moment A
18 Acting force B
19 external force 20 user 21 hand 71 cab room 72 upright column 73 car door 75 photoelectric device (light emitting unit)
76 Photoelectric device (light receiving unit)
77 sensing sensor 78 speaker 79 alarm lamp 81 car first door 82 car second door 83 hand 86 gap 88 car door panel 89 spring 90 electromagnet 91 plunger

Claims (3)

A door leg that is movably attached to the lower end of the door via a spring in the front-rear direction, and a spacer that engages with the door leg when the door is fully closed and regulates the front-rear movement of the door leg. An elevator door opening / closing device, comprising: The elevator door opening and closing device according to claim 1, further comprising a mechanism that drives the spacer by opening and closing the door. A wire and a pulley are provided, one end of the wire is fixed to a fixed frame of the door opening / closing device, the spacer is coupled to the other end of the wire, and the door opening / closing device is connected to the pulley around which the wire is wound. The elevator door opening / closing device according to claim 2, further comprising a mechanism for converting an opening / closing operation into a vertical movement of the spacer.

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