JP2008063076A - Door safety device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door safety device for elevator, capable of improving operation efficiency of an elevator by preventing an unnecessary operation such as false detection. <P>SOLUTION: A wing wall-side rope 9 and a door-side rope 11 are laid within a door-to-door gap G and a door pocket gap F along the vertical direction, respectively. This device comprises detection switches 18 and 23 for detecting drawing of the ropes 9 and 11 into the deep side of each gap G, F together with foreign matter. If foreign matter is drawn into the door pocket gap F or the door-to-door gap G during door opening operation, the rope 9 or the rope 11 is drawn into the deep side of the gap F or the gap G together with the foreign matter, and the detection switches 18, 23 perform detecting operation to immediately stop the door opening operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, a passenger's clothes, fingers, etc. should be placed between a sliding door that opens and closes an elevator door during the door opening operation and a wall that is in a superimposed relationship with the sliding door and moves relative to the sliding door during the door opening operation. The present invention relates to an elevator door pull-in prevention device that decelerates at least the door opening operation when a foreign object is drawn.

As this type of door safety device, for example, at the door opening / closing type door opening / closing type, the light emitting device and the light receiving device of the photoelectric switch are arranged so as to face each other and between the low speed sliding door and the high speed sliding door. Near the entrance of the gap and near the entrance of the gap between the low-speed sliding door and the sleeve wall, the irradiation light that becomes the detection area of the photoelectric switch is passed in the vertical direction, and the irradiation light is blocked by foreign substances during the door opening operation. Patent Document 1 discloses a technique for stopping the door opening operation of the sliding door on the condition that the photoelectric switch is detected and operated.
JP 2002-265175 A

  In the technique described in Patent Document 1, the adjustment of the optical axis of the irradiation light at the time of installation work or maintenance work is complicated, and the irradiation light passes through the space where passengers at the entrances and exits. There is a risk of malfunction due to the influence of disturbances such as light and dust from light sources other than projectors such as lighting, and the operation efficiency of the elevator itself may be reduced. In particular, when visible light is used as the irradiation light of the photoelectric switch, the passenger may feel uncomfortable when the irradiation light touches the passenger's eyes, which is not preferable.

  In addition, the photoelectric switch that detects foreign matter drawn into the gap between the high-speed sliding door and the low-speed sliding door has a projector and receiver that are fixed to the low-speed sliding door. The projectors such as transmission cables that move together with the sliding door and transmit signals to the door control device and cables attached to the light receiver are repeatedly bent, which is not preferable in terms of reliability of the door safety device.

  The present invention has been made in view of the above problems, and in particular, reliably detects the foreign object being drawn into the door pocket to prevent further foreign objects from being drawn in, and performs unnecessary operations such as erroneous detection. An object of the present invention is to provide an elevator door safety device which prevents the improvement of elevator operation efficiency.

  According to the first aspect of the present invention, a sliding door that is driven by a door driving device to open and close a car-side or landing-side doorway in the left-right direction at the time of opening the door, and is overlapped with the sliding door and opens the door. Assuming that this is a door safety device for an elevator that at least decelerates the door opening operation when a foreign object is drawn into the gap between the sliding door and the wall that moves relative to the sliding door, and moves vertically in the gap. And a detecting means for detecting that the cable body is drawn into the back side of the gap together with the foreign matter, and the cable body is opened during a door opening operation. The door opening operation is at least decelerated when the detection means performs the detection operation together with the foreign object to the back side of the gap.

  Here, as the wall body, in addition to the sleeve wall on the door pocket side beside the doorway, a high-speed slide door and the same speed as the high-speed slide door are synchronized with the displacement of the high-speed slide door when the doorway is opened and closed. For example, in a door opening / closing type door opening / closing type such as a two-piece single-opening type or a four-piece double-opening type provided with a low-speed sliding door that is displaced in the direction, the present invention can also be applied using the low-speed sliding door as a wall .

  Therefore, in the invention described in claim 1, since the cord-like body is disposed in the gap along the vertical direction, when a foreign object is drawn into the gap during the door opening operation, The cord-like body is drawn into the back side of the gap together with the foreign matter. And the pulling-in of the cord-like body is detected by the detecting means, and the door opening operation is at least decelerated to prevent further foreign matter from being drawn.

  Specifically, as described in claim 2, it is assumed that a biasing means for applying a predetermined tension to the cord-like body is provided.

  For example, as described in claim 3, the biasing means always pulls one end of the cord-like body with a predetermined biasing force, and the one end of the cord-like body is in the loosening direction of the cord-like body. When the detection means is provided with a detection switch that detects that one end of the cord-like body is displaced in the loosening direction of the cord-like body, the cord-like body and the foreign substance are disposed in the gap. When the cord is pulled back, the tension of the cord increases and one end of the cord is displaced in the loosening direction, and the detection switch performs a detection operation.

  On the other hand, as described in claim 4, a tensioner that is always pressed against the cord with a predetermined biasing force is provided as a biasing means, and the tensioner can be displaced in the loosening direction of the cord. When the detection switch for detecting that the tensioner is displaced in the loosening direction of the cord-like body is provided as the detection means, the cord-like body is drawn into the back side of the gap together with the foreign matter. When the tension of the cord-like body increases, the tensioner is displaced in the loosening direction together with the cord-like body, and the detection switch performs a detection operation.

  In addition, as described in claim 5, the slide door is a high-speed slide door, and the wall body is moved at a lower speed than the high-speed slide door in conjunction with the displacement of the high-speed slide door when the doorway is opened and closed. A low-speed sliding door that is displaced in the same direction as the high-speed sliding door, and the detection switch is fixed to the car enclosure or building enclosure in which the doorway is formed. The switch does not move.

  More specifically, as described in claim 6, a pair of pulleys are disposed above the doorway so as to face each other across the low-speed sliding door in the door opening / closing direction, and one end portion of the cord-like body is While extending in the vertical direction in the gap, the other end of the cord is spanned between the pulleys, and at the time of door opening / closing operation, one end of the cord is While moving in parallel with the low-speed sliding door, the other end of the cord-like body is configured to move between the pulleys.

  More specifically, as described in claim 7, at least one of the two pulleys is always urged in a direction away from the other pulley, and the one pulley functions as a tensioner. It is good to.

  According to the first aspect of the present invention, the detecting means operates to detect when the cord-like body is drawn into the back side of the gap together with the foreign matter, so that the detecting means is affected by disturbances such as dust. It will operate stably without receiving, and unnecessary operation such as false detection can be prevented and the operation efficiency of the elevator can be improved. In addition, since the cord-like body is disposed in the gap, the presence of the door safety device is not conspicuous in appearance and is preferable in terms of the design of the elevator.

  According to the fifth aspect of the present invention, since the detection switch does not move as in the prior art even when the low-speed sliding door is opened and closed, the reliability of the door safety device can be improved.

  FIG. 1 is a diagram showing an outline of a state in which an entrance / exit provided in an elevator car is fully closed as an embodiment of the present invention. FIG. 1 (a) is a view of the entrance / exit from the outside of a car room. FIG. 1B is a front view, and FIG. 2A is a view showing a state during the door opening operation of the doorway in FIG. 1A, and FIG. 2B is a cross-sectional view taken along line BB in FIG. It is.

  As shown in FIGS. 1 (a) and 1 (b), an entrance / exit 1 provided in an elevator car is formed in an opening in a vertical wall 2 on the landing side of a peripheral wall surrounding the car room, and a high-speed sliding door 3 and Opened and closed by the low speed sliding door 4. In addition, door hangers 5 and 6 are respectively attached to the upper portions of the slide doors 3 and 4, and the slide doors 3 and 4 are suspended from door rails (not shown) via the door hangers 5 and 6, respectively.

  The door opening / closing type of the doorway 1 is a so-called two-piece open type, and the door driving device 8 drives each sliding door 3, 4 based on a command from the door control device 7. Are slid in the same direction and at different speeds to open and close the doorway 1. When the doorway 1 is fully opened, the sliding doors 3 and 4 are accommodated in a door pocket space formed on the outer side of the sleeve wall 2a of the vertical wall 2 on the door opening direction side. In other words, the low-speed sliding door 4 as the wall body is superposed with the high-speed sliding door 3 and is displaced relative to the high-speed sliding door 3 when the door is opened, and the sleeve wall 2a as the wall body is superposed with the low-speed sliding door 4. Moreover, it is displaced relative to the low-speed sliding door 4 when the door is opened. Due to the opening / closing mechanism, a predetermined amount of inter-door gap G is provided between the low-speed sliding door 4 and the high-speed sliding door 3 in the thickness direction of each sliding door 3, 4. A predetermined amount of door pocket gap F is provided between 2a in the thickness direction of each of the sliding doors 3 and 4.

  A sleeve wall side rope 9 as a cord-like body is stretched in the door pocket gap F along the vertical direction, and one end of the sleeve wall side rope 9 is on the entrance / exit side of the outer wall surface of the sleeve wall 2a. And it is being fixed to the sleeve wall side fixing | fixed part 2b provided in the corner corner part of the downward side. A guide pulley 10 is provided immediately above the sleeve wall side fixing portion 2b, and the sleeve wall side rope 9 is wound around the guide pulley 10 and bent, and the other end of the sleeve wall side rope 9 is also bent. As will be described later, a predetermined tension is applied to the sleeve wall side rope 9 by being biased in the door closing direction. In other words, a portion of the sleeve wall side rope 9 between the sleeve wall side fixing portion 2b and the guide pulley 10 is drawn and stretched in the door pocket gap F as a detection portion 9a.

  On the other hand, a door-side rope 11 that is a cord-like body is stretched in the gap G between the doors in the vertical direction, and one end of the door-side rope 11 is on the door closing direction side of the rear surface of the low-speed sliding door 4. And it is being fixed to the door side fixing | fixed part 4a provided in the corner corner part of the downward side. Further, a guide pulley 12 is provided on the door hanger 6 of the low-speed sliding door 4, and the guide pulley 12 is located immediately above the door-side fixing portion 4a, and the door-side rope 11 is wound around the guide pulley 12. It has been.

  Further, a tension pulley 13 and a return pulley 14 are disposed above the entrance / exit 1 in the vertical wall 2, and both the pulleys 13 and 14 are disposed to face each other with the low-speed slide door 4 interposed therebetween in the door opening / closing direction. The door side rope 11 is stretched between the pulleys 13 and 14. The tension pulley 13 provided on the door opening direction side of the pulleys 13 and 14 is always biased in the door opening direction as will be described later, and the tension pulley 13 functions as a biasing means that acts as a tensioner for the door side rope 11. It is supposed to be.

  The other end of the door side rope 11 is fixed to a hanger side fixing portion 6 a provided on the door hanger 6 of the low speed slide door 4. In other words, the door side rope 11 is wound around the door side fixing part 4a, the guide pulley 12, the tension pulley 13, and the return pulley 14 in this order. While the portion between the two is drawn in as one end and is stretched in the gap G between the doors as the detection portion 11a in the vertical direction, the guide pulley 12 and the hanger side fixing portion 6a of the door side rope 11 The portion between the two forms a so-called endless shape substantially via the door hanger 6 as the driven portion 11b as the other end portion.

  Therefore, when the sliding doors 3 and 4 are opened, as shown in FIGS. 2A and 2B, the door-side rope 11 is drawn and the detection unit 11 a is parallel to the opening direction along with the low-speed sliding door 4. On the other hand, the hanger side fixing part 6a and the guide pulley 12 move together with the door hanger 6 in the door opening direction, so that the driven part 11b of the door side rope 11 moves around between the tension pulley 13 and the return pulley 14. Will be.

  The sleeve wall side rope 9 and the door side rope 11 are wire ropes having no elasticity.

  3 is an enlarged view of a portion C in FIG. 1. FIG. 3 (a) is a front view thereof, and FIG. 3 (b) is a plan view thereof.

  More specifically, as shown in FIG. 3, a substantially L-shaped spring bracket 16 is provided on the vertical wall 2 on the door opening direction side of the guide pulley 10, and a hole formed in the spring bracket 16 is provided. A sleeve wall side rope 9 is inserted through 16 a, and an end piece 15 is attached to the other end of the sleeve wall side rope 9. The end piece 15 is always urged in the door opening direction by a spring 17 interposed as an urging means between the end piece 15 and the spring bracket 16, and the end piece 15 is in the door closing direction, that is, the sleeve wall side rope 9. It can be displaced in the loosening direction. The spring 17 is a compression coil spring, and the sleeve wall side rope 9 is inserted through the center of the spring 17, and a predetermined tension is applied to the sleeve wall side rope 9 by the spring 17. In addition, a detection switch 18 that is a detection means facing the end piece 15 is fixed to the vertical wall 2 via a substantially L-shaped switch bracket 19, and the detection switch 18 is constantly pressed by the end piece 15. Yes. That is, the detection switch 18 detects the displacement of the end piece 15 in the door closing direction when the pressed state is released.

  On the other hand, the tension pulley 13 is attached to the pulley shaft 20a of the pulley bracket 20, and the pulley bracket 20 is a substantially L-shaped bracket body 20b and a rod 20c protruding from the bracket body 20b toward the door closing direction. It consists of and. A substantially L-shaped spring bracket 21 is fixed to the vertical wall 2 on the door closing direction side of the bracket body 20b, and a rod 20c is inserted through a hole 21a formed in the spring bracket 21. The bracket 20 can be displaced in the door closing direction, that is, in the loosening direction of the door side rope 11.

  A spring 22 is interposed between the bracket body 20b of the pulley bracket 20 and the spring bracket 21, and the pulley bracket 20 is constantly biased in the door opening direction. The spring 22 is a compression coil spring, and the rod 20 c is inserted through the center of the spring 22. In other words, the tension pulley 13 is urged in the door opening direction, that is, away from the return pulley 13 to increase the tension of the door side rope 11 and is constantly pressed against the door side rope 11. A predetermined tension is applied to 11.

  Further, the detection switch 23 is fixed to the vertical wall 2 via the switch bracket 24 so as to face the tip of the rod 20c, and the detection switch 23 detects that the tension pulley 13 is displaced in the door closing direction. It is supposed to be.

  4A and 4B are diagrams showing the guide mechanism of the pulley bracket 20 in FIG. 3, wherein FIG. 4A is a plan view thereof, and FIG. 4B is a cross-sectional view taken along DD in FIG. is there.

  As a guide mechanism for guiding the pulley bracket 20, a pair of upper and lower guide shoes 25 are provided on the bracket body 20b of the pulley bracket 20 as shown in FIGS. A guide rail 26 having a substantially flat channel shape may be provided so that the guide shoe 25 slides on the guide rail 26.

  FIG. 5 is a flowchart showing the control contents of the door control device 7 during the door opening operation, and FIGS. 6 (a) and 6 (b) show the operation of the door safety device in FIGS. 4 (a) and 4 (b), respectively. It is a figure which shows the state which carried out.

  In the elevator door safety device configured as described above, as shown in FIG. 5, after the door driving device 8 starts the door opening operation (step S <b> 1) based on a command from the door control device 7, the door opening operation is in progress. The door control device 7 constantly monitors the operation of the detection switches 18 and 23 (steps S2 to S4). During the door opening operation, the slide doors 3 and 4 move in the door opening direction, but the detection switches 18 and 23 are not displaced relative to the car housing.

  If a foreign object such as a finger or clothing of a passenger is drawn into the door pocket gap F during the door opening operation, the foreign object comes into contact with the sleeve wall side rope 9 and the sleeve wall side rope 9 bends to impact the foreign object. The sleeve wall side rope 9 is pressed by the foreign matter and is pulled into the back side of the door pocket gap F together with the foreign matter.

  In this way, the sleeve wall side rope 9 is pulled toward the back side of the door pocket gap F, whereby the tension of the sleeve wall side rope 9 increases and the end piece 15 resists the urging force of the spring 17 as shown in FIG. Then, it is displaced in the door closing direction. Then, the pressing state of the detection switch 18 is released, and the detection switch 18 outputs a foreign object detection signal to the door control device 7 to detect the foreign object being drawn.

  Further, when the foreign matter is drawn into the door gap G during the door opening operation, the door side rope 11 and the foreign matter gap G together with the foreign matter are drawn in the same manner as when the foreign matter is drawn into the door pocket gap F. As shown in FIG. 6, the tension pulley 13 is displaced together with the pulley bracket 20 against the urging force of the spring 22 in the door opening direction. When the pulley bracket 20 is displaced in the door opening direction, the rod 20c of the pulley bracket 20 presses the detection switch 23, and the detection switch 23 outputs a foreign object detection signal to the door control device 7 so as to prevent the foreign object from being detected. Pull-in will be detected.

  As described above, when the foreign object detection signal is taken into the door control device 7 during the door opening operation, the door control device 7 immediately stops the door opening operation of the door driving device 8 (step S5). Alternatively, it is possible to respond by reducing the door opening speed and securing time for the passenger to pull the foreign matter away from the door pocket gap F or the door gap G.

  Thereafter, after confirming that the foreign matter does not exist in the door pocket gap F and the door gap G, that is, that no foreign matter detection signal is output to the door control device 7 (steps S6 to S7), the normal door opening speed is set. The door 1 is opened at a lower speed to fully open the doorway 1 (steps S8 to S11). If a foreign object is detected again during the low-speed door opening operation, the process returns to step S5.

  In addition, when a foreign object detection signal is taken into the door control device 7 in a state other than during the door opening operation, an application such as an announcement or the like to alert the passenger is conceivable.

  Therefore, according to the elevator door safety device configured as described above, the sleeve wall-side rope 9 or the door-side rope 11 is pulled together with the foreign matter into the back side of the door pocket gap F or the door-to-door gap G. Therefore, the operation of the door safety device is stabilized without being affected by disturbances such as dust, and unnecessary operation such as erroneous detection can be prevented to improve the operation efficiency of the elevator.

  In addition, since the sleeve wall side rope 9 and the door side rope 11 are disposed inside the door pocket gap F and the door gap G, the presence of the door safety device becomes inconspicuous and the appearance quality of the elevator is improved. There are benefits.

  In addition, since the detection switch 23 for detecting the foreign object being drawn into the gap G between the doors is fixed to the vertical wall 2, the detection switch 23 does not move during the door opening / closing operation as in the prior art. The durability of the safety device is improved and its reliability is increased.

  Here, in the present embodiment, the present invention is applied to the two-piece single door type entrance / exit 1 formed in the car, but the present invention can be applied to the entrance / exit on the landing side as well as the door opening / closing type. Needless to say, the present invention can also be applied to, for example, a double door double door.

  FIG. 7 is a view showing a modification of the pulley bracket according to the second embodiment of the present invention. FIG. 7 (a) is a view showing the pulley bracket in a normal state, and FIG. 7 (b) is a detection operation. It is a figure which shows the pulley bracket of a state.

  In the second embodiment shown in FIGS. 7A and 7B, the pulley bracket 27 can swing and displace in the door closing direction around the swing shaft 27a, and the pulley bracket 27 can be a spring. The spring 28 is constantly urged in the door opening direction by a spring 28, and the spring 28 is backed up by a spring bracket 29 fixed to the vertical wall 2. The position of the swing shaft 27a is set to a position offset downward from the position of the pulley shaft 27b of the tension pulley 13, and the pulley bracket 27 swings and displaces so that the tension pulley 13 and the return pulley 14 The distance between the axes changes. That is, when the door side rope 11 is drawn into the back side of the inter-door gap G together with the foreign matter, the pulley bracket 27 resists the biasing force of the spring 28 in the door closing direction, in other words, the door side rope 11 is loosened. Swing displacement in the direction.

  In this case, a detection switch is arranged so as to detect the swinging displacement of the pulley bracket 27 in the loosening direction of the door-side rope 11, and the pulling-in of the foreign matter during the door opening operation is detected.

  Therefore, even when the pulley bracket 27 in the second embodiment is adopted, the same effect as in the first embodiment can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the entrance / exit formed in the elevator car as 1st Embodiment of this invention, Comprising: The same figure (a) is the front view, The same figure (b) is A- in the same figure (a). A sectional drawing. It is the schematic which shows the state in the door opening operation | movement of the doorway shown to (a) of FIG. 1, Comprising: The figure (a) is the front view, The figure (b) is the BB cross section in the figure (a). Figure. It is the enlarged view of the C section in FIG. 1, Comprising: The figure (a) is the front view, The figure (b) is the top view. It is a figure which shows the guide mechanism of a pulley bracket, Comprising: The figure (a) is the front view, The figure (b) is DD sectional drawing in the figure (a). The flowchart which shows the control content of the door control apparatus at the time of door opening operation | movement. It is an enlarged view of the C section in Drawing 1 showing the operation state of a door safety device, the figure (a) is the front view, and the figure (b) is the top view. It is a figure which shows the modification of a pulley bracket as the 2nd Embodiment of this invention, Comprising: The figure (a) is a figure which shows the pulley bracket in a normal time, The figure (b) shows the pulley bracket at the time of detection operation | movement. FIG.

Explanation of symbols

1 ... Entrance / exit 2a ... Sleeve wall (wall)
3 ... High-speed sliding door 4 ... Low-speed sliding door (wall)
8 ... Door drive device 9 ... Sleeve wall side rope (cord)
11 ... Door side rope (cord)
13. Tension pulley (tensioner)
14 ... Return pulley 17 ... Spring (biasing means)
18 ... Detection switch (detection means)
23. Detection switch (detection means)
G ... Gap between doors F ... Gap between doors

Claims (7)

A sliding door that is driven by a door drive device when the door is opened and opens / closes the entrance / exit on the car side or landing side in the left-right direction, and is in a superimposed relationship with the sliding door and moves relative to the sliding door when the door is opened. A door safety device for an elevator that at least decelerates a door opening operation when a foreign object is drawn into a gap between the wall body,
A cord-like body stretched in the vertical direction in the gap, and a detecting means for detecting that the cord-like body is drawn into the back side of the gap together with the foreign matter, and
The door safety device for an elevator characterized in that the door opening operation is at least decelerated when the detecting means performs the detection operation when the cord-like body is drawn into the back side of the gap together with a foreign object during the door opening operation. .   2. The elevator door safety device according to claim 1, further comprising urging means for applying a predetermined tension to the cord-like body.   The urging means always pulls one end of the cord-like body with a predetermined urging force, and one end of the cord-like body is displaceable in the loosening direction of the cord-like body, 3. The elevator door safety device according to claim 2, further comprising a detection switch that detects that one end is displaced in the loosening direction of the cord-like body as the detection means.   A tensioner that is always pressed against the cord with a predetermined biasing force is provided as a biasing means, and the tensioner is displaceable in the loosening direction of the cord, and the tensioner is the cord The elevator door safety device according to claim 2, further comprising a detection switch that detects displacement in the direction of loosening as the detection means.   The sliding door is a high-speed sliding door, and the wall body is a low-speed sliding door that is displaced in the same direction as the high-speed sliding door at a lower speed than the high-speed sliding door in conjunction with the displacement of the high-speed sliding door when the doorway is opened and closed. 5. The elevator door safety device according to claim 4, wherein a detection switch is fixed to a car housing or a building housing in which the doorway is formed. A pair of pulleys are disposed opposite to each other across the low-speed sliding door in the door opening / closing direction above the doorway, and one end portion of the cord-like body is stretched in the vertical direction in the gap And the other end of the cord-like body is stretched between the pulleys,
At the time of door opening / closing operation, one end portion of the cord-like body moves in parallel with the low-speed slide door, while the other end portion of the cord-like body moves around between the pulleys. The elevator door safety device according to claim 5.   7. The pulley according to claim 6, wherein at least one of the pulleys is always urged in a direction away from the other pulley, and the one pulley functions as a tensioner. Elevator door safety device.

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