JP2007076855A - Door closing safety device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door closing safety device for an elevator capable of easily reacting to force from any direction for an obstacle at an entrance, being miniaturized to reduce size of an installation space, realizing a simple configuration for reducing failure, and being inexpensively manufactured. <P>SOLUTION: This door closing safety device is provided with a contact bar 2 provided by protruding in a tip part of a door 1 of a car opening and closing the entrance. When the obstacle hits on the contact bar, it is pulled in to invert the door of the car. The contact bar 2 is supported through an elastic body 4 to oscillate and displace. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a door safety device for an elevator so as not to be pinched by a door being closed.

  Elevator door closing safety devices are widely used in elevator door closing devices. When the door is closed, the contact bar protruding at the front end of the door hits an obstacle at the entrance, and the contact bar retracts. Enters and reverses the door. In addition, because there is a contact bar at the tip of the door, when the door is closed, it is also used to reverse the door by retracting the contact bar instead of pressing the door opening button on the operation panel ( For example, see Patent Document 1).

Japanese Utility Model Publication No. 56-135985

  In the conventional door closing safety device of an elevator, when the door is closed, a force is required to extend the hand and retract the contact bar in order to catch up with a person who has missed the ride. In particular, the contact bar is supported by the link and does not retract unless it is pushed in the door opening direction, so that there is a problem that the balance of the body is easily lost when the hand is extended and the force does not enter well. Moreover, a foot tip may be pinched | interposed into the clearance gap between the lower end of a contact bar and a threshold. Furthermore, in the case of a person who connects dogs with a string, it was not possible to detect that the dog string entered the gap between the door and the contact bar.

  The present invention has been made to solve the above-described problems. It is easy to react to the force from any direction against the obstacles at the entrance and exit, and the apparatus is made compact to reduce the installation space, and further, the failure is prevented. It is an object of the present invention to provide an elevator door closing safety device that can be manufactured inexpensively with a small number of simple configurations.

  The elevator door closing safety device according to the present invention includes a contact bar that protrudes from the tip of the car door that opens and closes the doorway, and retracts when the obstacle hits the contact bar to reverse the car door. In such a configuration, the contact rod is supported through an elastic body so as to be swingable.

  In addition, a movable contact bar mounting base that supports the contact bar so that it can be swung through an elastic body, a movable contact bar mounting base, and a cage door are provided, respectively, and the movable contact bar mounting base is slidably guided. Guide device, a link provided at the door of the car, a cam portion provided at the tip of the link and displaced in conjunction with the door of the car, and a movable contact bar mounting base. A guide roller that engages with the cam portion that is displaced in conjunction with the guide roller and changes the amount of protrusion of the contact rod.

  According to the present invention, since the contact rod is supported via the elastic body so as to be able to swing, there is no link mechanism as in the prior art, the structure is simple and compact, and the installation space is small. In addition, since force in any direction can be detected, even if the toes are caught in the gap between the lower end of the contact bar and the sill, or the string of the person who connects the dog with the string enters the gap between the door and the contact bar, Since the contact rod is swung and can be detected, it is possible to cope with an accident that cannot be predicted.

Embodiment 1.
1 is a plan view showing a state in which a passenger is sandwiched between a door of a car and a door-to-door pillar, showing a door safety device for an elevator according to Embodiment 1 of the present invention, and FIG. 2 is a contact rod at the tip of the car door. FIG. 3 is a front view of the elevator car door closing safety device according to the first embodiment of the present invention as seen from the landing side, and FIG. 3 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 5 is a cross-sectional view taken along line BB in FIG.

  In the figure, reference numeral 1 denotes an elevator car door, which shows an example of a two-door single-opening door closing device, but other numbers of door closing devices may be used. Reference numeral 2 denotes a contact bar having a U-shaped cross section that extends from the top of the car door 1 so as to extend over almost the entire length in the vertical direction. A hollow portion is formed inside the contact bar. 2a is a back support seat provided on the opposite side of the upper and lower ends of the contact rod 2 (retreat side), and 3 is a pair of upper and lower L-shaped parts fixed to the upper and lower ends of the front end side of the car door 1, respectively. 4 is an elastic body unit made of rubber or the like provided between the back receiving seat 2a on the anti-projection side (retreat side) of the upper and lower ends of the contact bar 2 and the L-shaped fixture 3. The upper and lower ends of the contact bar 2 are elastically supported and fixed. Here, the contact bar 2 is supported by the elastic body unit 4 so as to be displaceable not only in the retracting direction but also in the swinging direction. Reference numeral 5 denotes a central Z-shaped fixture fixed to the central portion on the front end side of the car door 1, 6 denotes a hemispherical contact provided on the inner surface of the hollow portion in the central portion on the front end side of the contact rod 2, and 7 denotes this hemisphere A match bar-like electrical contact disposed in the hollow portion of the contact bar 2 so as to face the shaped contact 6, and its attachment side end is supported and fixed to the Z-shaped fixture 5. 8 is an elevator car room, 8a is an entrance / exit pillar of the car room 8, 8b is a car operation panel, 9 is a door-to-door pillar of the car room 8, 10 is a passenger who is sandwiched, 11 is a passenger's hand, 12 is late It is the hand of the passenger who is in the cab room 8 trying to save the passenger.

  In the elevator door closing safety device configured as described above, the contact rod 2 attached to the tip of the car door 1 is elastically supported via the elastic body unit 4 provided at the upper and lower ends of the door 1. Has been. Then, during the door closing operation, when the contact bar 2 moves backward due to an obstacle touching the contact bar 2 and the elastic body unit 4 being bent, the hemispherical contact 6 in the contact bar 2 becomes a match bar-shaped electrical contact 7. , The door is electrically shorted, and a door reversing operation is commanded, and the car door 1 is reversed. Further, when the obstacle moves across the entrance / exit, the contact bar 2 is swung laterally, and the hemispherical contact 6 in the contact bar 2 contacts the match bar-like electrical contact 7 to electrically The door reversing operation is commanded by short-circuiting, and the car door 1 is reversed. In addition, if a late passenger reaches his or her hand from the landing and pushes the contact bar 2 in the retracting direction or oblique direction, the contact bar 2 swings and the hemispherical contact 6 in the contact bar 2 becomes a match bar-like electrical contact 7. , The door is electrically shorted, and a door reversing operation is commanded, and the car door 1 is reversed. Also, if the passenger in the cab 8 notices the late passenger and pushes the contact bar 2 in the pulling direction or oblique direction with his / her hand, the contact bar 2 swings and the hemispherical contact 6 in the contact bar 2 is shaped like a match bar. Is contacted with the electrical contact 7 and is electrically shorted to command a door reversing operation, and the car door 1 is reversed. Moreover, if the elderly person who is likely to be pinched by the door is seen and the contact bar 2 is pressed quickly, it is possible to prevent the elderly person from falling down.

  Therefore, according to the first embodiment, since the contact rod is supported through the elastic body unit so as to be swingable, there is no link mechanism as in the prior art, the structure is simple and compact, and the installation space is also small. It's small. In addition, since force in any direction can be detected, even if the toes are caught in the gap between the lower end of the contact bar and the sill, or the string of the person who connects the dog with the string enters the gap between the door and the contact bar, Since the contact rod is swung and can be detected, it is possible to cope with an accident that cannot be predicted.

Embodiment 2.
FIG. 6 is a front view of a car door showing a door safety device for an elevator according to Embodiment 2 of the present invention as seen from the landing side.

  In the first embodiment, a central Z-shaped fixture 5 fixed to the center of the front end of the car door 1 and a hemispherical contact provided on the inner surface of the hollow of the center of the front end of the contact bar 2. 6 and an example in which a detection contact portion composed of a match rod-shaped electrical contact 7 disposed in the hollow portion of the contact rod 2 so as to face the hemispherical contact 6 is installed at one central portion. However, in the second embodiment, a pair of upper and lower Z-shaped fixtures 5 fixed to the upper and lower portions on the front end side of the car door 1 and the inner surface of the hollow portion at the upper and lower ends on the front end side of the contact rod 2 are provided. A pair of upper and lower hemispherical contacts 6 are arranged in the hollow portion of the contact bar 2 so as to face the hemispherical contacts 6, and the attachment side ends are supported by the Z-shaped fixtures 5. It consists of a fixed match rod-shaped electrical contact 7, and the detection contact part is arranged at the upper and lower parts 2. One in which was installed in place. The upper detection contact portion is provided below the elastic body support portion at the upper end, and the lower detection contact portion is provided above the elastic support portion at the lower end. Other configurations are the same as those in the first embodiment.

  Therefore, according to this second embodiment, by setting the detection contact part to two places at the top and bottom, even if a difference occurs in the movement of the detection unit, it can be detected either up or down, so the detection accuracy is improved. Can be increased.

Embodiment 3.
FIG. 7 is a front view of the entire car showing the elevator door closing safety device according to the third embodiment of the present invention as seen from the landing side, and FIG. 8 is a cam showing the elevator door closing safety device according to the third embodiment of the present invention. FIG. 9 is a detailed perspective view of the guide mechanism of the movable contact bar mounting base showing the elevator door closing safety device according to the third embodiment of the present invention, and FIG. 10 is an elevator diagram according to the third embodiment of the present invention. FIG. 11 is a cross-sectional view of an essential part showing a state of the door-closing safety device when the door is fully closed, and FIG. These are principal part sectional drawings which show the state at the time of door full open of the door safety device for elevators in Embodiment 3 of this invention.

  In the figure, 1 is an elevator car door and 1a is a low-speed door. Reference numeral 2 denotes a contact bar having a U-shaped cross section that extends from the top of the car door 1 so as to extend over almost the entire length in the vertical direction. A hollow portion is formed inside the contact bar. 2a is a back receiving seat provided on the anti-protruding side (retreat side) of the upper and lower ends of the contact bar 2, 24a is a movable contact bar mounting base for mounting the contact bar 2, and 3 is this movable contact bar mounting base. A pair of upper and lower L-shaped fixtures fixed to the upper and lower ends of 24a, 4 is a back receiving seat 2a on the opposite side (retreat side) of the upper and lower ends of the contact rod 2 and an L-shaped fixture 3 The upper and lower ends of the contact bar 2 are elastically supported and fixed by an elastic body unit made of rubber or the like provided between them. Here, the contact bar 2 is supported by the elastic body unit 4 so as to be displaceable not only in the retracting direction but also in the swinging direction. Reference numeral 5 denotes a pair of upper and lower Z-shaped fixtures fixed to the upper and lower portions of the movable contact bar mounting base 24a. Reference numeral 6 denotes a pair of upper and lower hemispherical contacts provided on the inner surface of the upper and lower hollow parts of the contact bar 2. Matching elements 7 and 7 are match bar-shaped contacts arranged in the hollow portion of the contact bar 2 so as to face the respective hemispherical contacts 6, and their attachment side ends are supported and fixed to the respective Z-shaped attachments 5. Has been. 8 is an elevator car room, 8a is an entrance / exit pillar of the car room 8, 8b is a car operation panel, 9 is a door-to-door pillar of the car room 8, and 55a is fixed to the upper and lower portions of the movable contact bar mounting base 24a by a countersunk screw 55b. A pair of upper and lower guide arms 56 are a guide frame containing a pair of upper and lower sliding materials fixed to the upper and lower ends of the car door 1 by bolts 56a, and can be slid by inserting the guide arms 55a into the frame. I support it. The guide arm 55a and the guide frame 56 constitute a guide device for the movable contact bar mounting base 24a. 59 and 61 are links connecting the car door 1, 60 is a shaft pin provided at the tip of the link 59, and 58 is a cam-shaped cam body formed at the tip of the link 59. Thus, a cam portion 58a is formed at the foremost portion. Reference numerals 62 and 63 denote guide rollers provided at the center of the movable contact rod mounting base 24a, and sandwich the cam portion 58a from both sides. The engaging positions of the cam portion 58a and the guide rollers 62 and 63 are displaced in conjunction with the change of the car door 1 from the fully open position to the fully closed position, and the contact bar 2 protrudes from the car door 1. The position (projection amount) is changed.

  In the elevator door closing safety device constructed as described above, the movable contact bar mounting base 24a is provided with a pair of upper and lower guide arms 55a, and is slidable on the car door 1 by the guide frame 56 containing the sliding material of the door. It is supported by. A link 61 having one end pivotally supported by the low-speed door 1a, one end connected to the other end of the link 61, the other end pivotally supported by the car door 1, and a hook-shaped cam at the tip. A link 59 having a main body 58 is connected. As a result, the links 59 and 61 are rotated by opening and closing the car door 1, so that the position of the cam body 58 at the tip of the link 59 is displaced. That is, when the door is fully closed, the protruding dimension of the contact rod 2 from the tip of the door 1 is determined by the length of the radius r3 of the cam body 58, and the protruding amount is small as shown in FIG. Further, when the door is half open, the length of the cam body 58 having the radius r1 determines the projecting dimension of the contact bar 2 from the tip of the door 1, and the projecting amount is maximum as shown in FIG. Further, when the door is fully opened, in order to ensure an effective width of the entrance, as shown in FIG. 12, the protruding dimension of the contact bar 2 is set to a protruding amount close to 0 with the length of the radius r2 of the cam body 58.

  Therefore, according to this Embodiment 3, it can be made to retreat from the door front-end | tip according to the open state of a door like the conventional contact bar.

Embodiment 4.
13 is a front view of a car door showing an elevator door-closing safety device according to Embodiment 4 of the present invention as seen from the landing side, and FIG. 14 is a cross-sectional view taken along the line CC of FIG.

  In the first embodiment, an elastic body unit made of rubber or the like provided between the back receiving seat 2a of the anti-projection side (retreat side) of the upper and lower ends of the contact bar 2 and the L-shaped fixture 3 4, the upper and lower ends of the contact bar 2 are elastically supported and fixed. In the fourth embodiment, the contact bar 2 is elastically supported by a coil spring 44 instead of the elastic body unit 4 such as rubber. It is fixed. Other configurations are the same as those in the first embodiment.

  Therefore, according to Embodiment 4, there is an effect that the contact rod can be stably supported by the spring support.

Embodiment 5.
FIG. 15 is a front view of an essential part in which a detection contact portion showing an elevator door closing safety device according to Embodiment 5 of the present invention is replaced with an electric switch such as a micro switch, and FIG. 16 is a perspective view showing the micro switch.

  In the first embodiment, the hemispherical contact 6 provided on the inner surface of the hollow portion at the center of the tip side of the contact rod 2 and the hollow portion of the contact rod 2 are disposed so as to face the hemispherical contact 6. In the fifth embodiment, the detection contact portion including the match rod-shaped electrical contact 7 is disposed at one central portion. However, in the fifth embodiment, the hemispherical contact 6 and the match rod-shaped electrical contact 7 In place of the detection contact made of the contact rod 2, the switch tip connector 2 b provided on the inner surface of the hollow portion at the center of the tip side of the contact rod 2 and the hollow portion of the contact rod 2 so as to face the switch tip connector 2 b A swing operation shaft is disposed, and an electrical switch 13 such as a micro switch with a swing operation shaft whose switch body is fixed to the Z-shaped fixture 5 is provided.

  Therefore, according to the fifth embodiment, since the contact is not exposed, stable detection can be performed without the contact being soiled or moistened by the atmosphere. Also, installation adjustment can be facilitated.

Embodiment 6.
FIG. 17 is a front view of a car door showing an elevator door closing safety device according to Embodiment 6 of the present invention as seen from the landing side, and FIG. 18 is a perspective view showing the main part.

  In the first embodiment, the contact rod 2 attached to the tip of the car door 1 is elastically supported via the elastic body unit 4 provided at the upper and lower ends of the door 1. In the form 6, when the height of the door 1 of the car becomes large and the contact bar 2 becomes long and heavy, the support bar 2 is supported and supported by adding a rubber 66. Reference numeral 64 is a receiver fixed to the car door 1, and 65 is a support plate formed by bending a part of the back surface receiving seat 2 a of the contact bar 2 to the hollow portion side. The support rubber 66 is provided between the receiving metal 64 and the support plate 65 to support the weight of the contact bar 2.

  Therefore, according to the sixth embodiment, since the contact bar does not fall due to the weight of the contact bar itself, accurate detection can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a state in which a passenger is sandwiched between a car door and a door-to-door pillar, showing the elevator door safety device according to Embodiment 1 of the present invention. It is FIG. 1 equivalent view which shows the state which extended the hand and pushed the contact rod of the car door front end. It is the front view which looked at the door of the car which shows the door-closing safety device of the elevator in Embodiment 1 of this invention from the landing side. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. It is the front view which looked at the door of the car which shows the door-closing safety device of the elevator in Embodiment 2 of this invention from the landing side. It is the front view which looked at the whole car which shows the door-closing safety device of the elevator in Embodiment 3 of this invention from the landing side. It is detail drawing of the cam which shows the door-closing safety device of the elevator in Embodiment 3 of this invention. It is a detailed perspective view of the guide mechanism of the movable contact bar | burr mounting base which shows the door-closing safety | security apparatus of the elevator in Embodiment 3 of this invention. It is principal part sectional drawing which shows the state at the time of door full-close of the door-closing safety device of the elevator in Embodiment 3 of this invention. It is principal part sectional drawing which shows the state at the time of the door half opening of the door closing safety apparatus of the elevator in Embodiment 3 of this invention. It is principal part sectional drawing which shows the state at the time of the door full open of the door safety device for elevators in Embodiment 3 of this invention. It is the front view which looked at the door of the car which shows the door-closing safety device of the elevator in Embodiment 4 of this invention from the landing side. It is sectional drawing along CC line of FIG. It is the principal part front view which replaced the detection contact part which shows the door-closing safety | security apparatus of the elevator in Embodiment 5 of this invention with electric switches, such as a microswitch. It is a perspective view which shows a microswitch. It is the front view which looked at the door of the car which shows the door-closing safety device of the elevator in Embodiment 6 of this invention from the landing side. It is a perspective view which shows the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car door 1a Low-speed door 2 Contact bar 2a Back seat 2b Switch tip connector 3 L-shaped attachment 4 Elastic body unit 5 Z-shaped attachment 6 Hemispherical contact 7 Match rod-shaped electrical contact 8 Elevator Car room 8a Entrance / exit column 8b Car operation panel 9 Door-to-door column 10 Passenger 11, 12 Passenger's hand 13 Micro switch 24a Movable contact bar mount 44 Coil spring 55a Guide arm 55b Countersunk screw 56 Guide frame 56a Bolt 58 Cam body 58a Cam part 59, 61 Link 62, 63 Guide roller 64 Base 65 65 Support plate 66 Support rubber

Claims (4)

In the elevator door closing safety device provided with a contact bar protruding from the tip of the car door that opens and closes the doorway, retracted when an obstacle hits the contact bar, and reversed the car door,
The door closing safety device for an elevator, wherein the contact bar is supported by an elastic body so as to be swingable and displaceable.   The contact rod has a U-shaped cross section, and has a hollow portion formed inside thereof. The contact rod includes a hemispherical contact that faces the electrical contact and surrounds the electrical contact on the inner surface of the hollow portion, and the electrical contact and the hemispherical contact The elevator door closing safety device according to claim 1, wherein the door of the car is inverted when the door contacts.   The contact rod has a micro switch with a swing operation shaft on the back side, and when the contact rod is displaced in the retracting direction or the swing direction, the swing operation shaft of the micro switch operates to reverse the door of the car. The elevator door-closing safety device according to claim 1. In the elevator door closing safety device provided with a contact bar protruding from the tip of the car door that opens and closes the doorway, retracted when an obstacle hits the contact bar, and reversed the car door,
A movable contact bar mounting base that supports the contact bar through an elastic body so as to be swingable and displaceable, and the movable contact bar mounting base and the door of the car are provided respectively, and the movable contact bar mounting base is slid. A guide device for moving and guiding, a link provided on the door of the car, a cam portion provided at the tip of the link and displaced in conjunction with the door of the car, and provided on the movable contact rod mounting base An elevator door closing safety device comprising: a guide roller that engages with a cam portion that is displaced in conjunction with the car door and changes a protruding amount of the contact bar.

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