JP2009166956A - Elevator door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door device for loading energizing force on a car door in the closing direction to prevent a passenger in a car from intentionally opening the car door. <P>SOLUTION: A roller 22 is rotatably supported by a movable member 22 supported on the car door 3L in an up-and-down movable manner. When the car door 3L is closed, the roller 22 is thrust by an inclined face 31a of a cam rail 31 extending in a door opening/closing direction to receive reaction S including horizontal force component H in the door closing direction. So, the car door 3L is energized in the door closing direction to prevent a passenger in the car from intentionally opening the car door 3L. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door device that urges a car door in a closing direction so that the car door does not open easily when a passenger in an elevator car intentionally opens the car door. The present invention relates to an improved door device that can apply a biasing force in a closing direction only when it starts to open.

Conventionally, in an elevator door device, various devices have been made so that passengers in an elevator car cannot intentionally open the car door.
For example, in the apparatus described in Patent Document 1 below, a door drive motor that opens and closes a car door keeps the car door closed by continuously driving the car door in the closing direction. Therefore, when the power supply to the elevator is stopped due to a power failure or the like, the car door cannot be held closed.

  Therefore, a roller is pressed against the side surface of the pulley around which an endless belt for opening and closing the car door is wound to generate friction, and the car door cannot be opened unless a certain external force is applied. An apparatus has been proposed (see Patent Document 2 below).

  There has also been proposed a door device that urges a car door in a closing direction using a spring or a weight (see Patent Documents 3 and 4 below).

JP-A-6-72676 JP 2002-128435 A JP 2000-211859 A JP-A-3-267287

However, in the door device described in Patent Document 2, since the friction generated between the pulley and the roller fluctuates, it is difficult to generate a constant load.
Further, in the elevator door device described in Patent Documents 2, 3, and 4, the load on the door drive mechanism increases in the entire range of the opening / closing stroke of the car door, so that the driving efficiency for opening and closing the door is increased. Will fall.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems of the prior art and prevent a car door from opening easily when a passenger in an elevator car intentionally opens the car door. It is an object of the present invention to provide an improved door device that can apply a biasing force in the closing direction only when the car door starts to open.

The present invention for solving the above problems
A door device capable of energizing an elevator car door in a closing direction,
A cam rail extending in the opening / closing direction of the car door;
A movable member supported by the car door via a link mechanism so as to be movable up and down;
A roller rotatably supported by the movable member that rolls on the surface of the cam rail when the car door opens and closes;
Urging means for urging the movable member to press the roller against the surface of the cam rail,
The cam rail is provided with an inclined surface that applies a reaction force including a horizontal component force that urges the car door in the closing direction to the roller, and extends from the end of the inclined surface in the opening direction of the car door. A horizontal plane,
The inclined surface is positioned such that the roller always abuts when the car door is closed.

That is, in the elevator door device of the present invention, the roller is always in contact with the inclined surface of the cam rail when the car door is closed.
At this time, since the urging means urges the movable member, the roller is pressed against the inclined surface of the cam rail and receives a reaction force from the inclined surface.
Of the reaction force acting on the roller, the horizontal component force in the door closing direction acts on the car door via the roller and the movable member, so that the car door is biased in the closing direction.
As a result, by appropriately adjusting the magnitude of the urging force that the urging means urges the movable member, even if a passenger in the car tries to open the car door intentionally, the car door cannot be opened easily. Thus, the car door can be biased in the closing direction.

On the other hand, when the car door is opened to some extent and the roller moves from the inclined surface to the horizontal plane, the reaction force acting on the roller from the horizontal plane does not include the horizontal component of the door closing direction. The biasing force stops working.
As a result, the biasing force in the door closing direction acts on the car door only when the roller is in contact with the inclined surface, and the closing force is applied to the car door over the entire range of the car door opening / closing stroke. Since the force does not act, it is possible to minimize the decrease in the driving efficiency of the door driving device that opens and closes the car door.
Furthermore, since the roller rolls on the inclined surface of the cam rail, a force for urging the car door in the closing direction can be stably obtained.

Further, the cam rail can be composed of a fixed portion having a horizontal surface and an adjusting portion having an inclined surface.
The adjustment portion is fixed to the car door so that the position of the adjustment portion is adjustable so that the inclination angle of the inclined surface with respect to the horizontal plane can be adjusted.
Thereby, by adjusting the inclination angle of the inclined surface, the magnitude of the urging force for urging the car door in the closing direction, separately from the adjustment of the magnitude of the urging force by which the urging means urges the movable member. Can be adjusted easily.

The inclined surface has a first inclined surface having a large inclination angle with which the roller contacts when the car door is closed, and a first inclined surface interposed between the first inclined surface and the horizontal surface. 2 inclined surfaces.
Thereby, even when the inclination angle of the first inclined surface is increased and the urging force in the door closing direction with respect to the car door is increased, the roller smoothly moves from the first inclined surface to the horizontal surface via the second inclined surface. The car door can be opened smoothly.

The link mechanism is composed of a pair of upper and lower first link members whose base ends are pivotally supported by the car doors and whose swing ends are pivotally supported by the movable members and swingable in parallel with each other. It can be a link mechanism.
Further, the link mechanism has a pair of upper and lower second links that are pivotally supported in parallel with each other, with a longitudinal intermediate portion thereof pivotally supported by the car door and one pivot end thereof pivotally supported by the movable member. It can also be a parallel link mechanism composed of members.
Thus, the car door can be urged in the closing direction with an optimum structure according to the structure of the car door, the structure of the door driving device that opens and closes the car door, and the open / close interlocking structure of the car door and the landing door.

Further, the movable member is supported by the urging means so as to be displaced downward, and the cam rail can be configured such that the horizontal surface faces upward and the inclined surface faces obliquely upward.
Alternatively, the movable member is supported by the urging means so as to be displaced upward, and the cam rail can be configured such that the horizontal plane faces downward and the inclined surface faces obliquely downward.

Further, the biasing means may be a weight that is integrally fixed by combining a plurality of weight members.
Thereby, by adjusting the number of weight members to be combined, the magnitude of the urging force for urging the movable member, and hence the magnitude of the urging force for urging the car door in the closing direction can be freely adjusted.
Further, the urging means may be a tension spring or a compression spring interposed between the car door and the movable member.

In addition, detection means for detecting opening / closing of the car door is further provided, and as long as the roller is in contact with the inclined surface, a signal indicating that the car door is closed is output from the door opening / closing detection means. be able to.
As a result, a signal indicating that the car door is opened is output from the detection means only when the roller moves from the inclined surface to the horizontal surface, and the urging force in the door closing direction does not act on the car door. It is possible to reliably detect that the stroke is being opened beyond the stroke.

  According to the present invention, when a passenger in an elevator car intentionally attempts to open a car door, the door device can be urged in a closing direction so that the car door does not open easily. It is possible to provide an improved door device that can stably apply a biasing force in the closing direction only when the door starts to open.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 12, each embodiment of the door apparatus of the elevator which concerns on this invention is described in detail. In the following description, the same parts are denoted by the same reference numerals, and redundant description is omitted.

1st Embodiment First, with reference to FIGS. 1-4, the door apparatus of the elevator of 1st Embodiment is demonstrated in detail.

A door device 100 according to the first embodiment shown in FIG. 1 includes a machine base 1 fixed to a car not shown, and a hanger rail 2 fixed to the machine base 1 and extending horizontally in the door opening / closing direction. .
Further, hanger rollers 5 that roll on the hanger rail 2 are rotatably supported by the hangers 4L and 4R fixed to the upper portions of the pair of left and right car doors 3L and 3R.
As a result, the pair of left and right car doors 3L and 3R can be smoothly opened and closed in the left-right direction in the figure as each hanger roller 5 rolls on the hanger rail 2.

A door drive mechanism 10 for opening and closing the car doors 3L and 3R is provided on the upper portion of the machine base 1.
The door drive mechanism 10 includes a drive sheave 12 that is rotationally driven by a drive motor 11 fixed to the upper left side of the machine base 1, a driven sheave 13 that is rotatably supported on the upper right side of the machine base 1, and these And an endless drive belt 14 wound between the sheaves 12 and 13.
Of the driving belt 14 extending between the sheaves 12 and 13, the upper portion 14a is connected to the upper end of the bracket 15 attached to the right hanger 4R, and the lower portion 14b is a door described below. The upper end of the fixed vane 21 of the engagement mechanism 20 is connected via the bracket 16.
Thus, by driving the drive motor 11 to rotationally drive the drive sheave 12, the pair of left and right car doors 3L and 3R can be opened and closed while being interlocked with each other.

The left car door 3L is provided with a door engaging mechanism 20 for opening and closing a hall door side holder (not shown) in conjunction with opening and closing of the car door 3L.
The door engagement mechanism 20 has a fixed vane 21 that is fixed to the left car door 3L and the hanger 4L by brackets 17 and 17 and extends in the vertical direction.
A movable vane 22 that extends parallel to the vertical direction while facing the fixed vane 21 is supported on the fixed vane 21 by a parallel link mechanism.
The parallel link mechanism is composed of a pair of upper and lower first link members 23 and 24 each having a base end pivotally supported by the fixed vane 21 and a swing end pivotally supported by the movable vane 22.
Thereby, the movable vane 22 can reciprocate between a position where the movable vane is raised and approached with respect to the fixed vane 21 and a position where the movable vane 22 is lowered and separated.

A cam rail 31 constituting a door urging mechanism 30 is fixed to a lower portion of the drive motor 11 in the machine base 1 so as to extend horizontally in the door opening / closing direction.
As shown in FIG. 2 in an enlarged manner, the cam rail 31 has an inclined surface 31a that faces obliquely upward to the right, and a horizontal surface 31b that is connected to the inclined surface 31a and faces upward.
A roller 32 that can roll on the inclined surface 31 a and the horizontal surface 31 b is rotatably supported on the upper portion of the movable vane 22 by a bracket 33.
Further, a weight 34 is attached to the movable vane 22 and always urges the movable vane 22 downward.

Furthermore, a door opening / closing detection mechanism 40 for detecting the opening / closing of the car door 3R is provided in the upper part of the right car door 3R in the machine base 1.
The door opening / closing detection mechanism 40 is attached to the right hanger 4R and attached to a switch cam 41 that reciprocates integrally, an arm 42 that is swingably supported by the machine base 1, and a swing end of the arm. And a roller 43 that contacts the switch cam 41.
Then, when the right door 3R is moved from the closed state in the door opening direction, the roller 43 is detached from the switch cam 41 and the arm 42 swings downward, so that it can be detected that the car door 3R is opened. .
Similarly, when the right car door 3R is displaced from the opened state in the door closing direction, the roller 43 rides on the switch cam 41 and the arm 42 swings upward, so that the car door 3R is detected to be closed. Can do.

In addition, as indicated by an imaginary line in FIG. 2, an interlock mechanism 50 is provided in the hall on the hall side.
This interlock mechanism 50 is for locking the hold door in a closed state until the car door 3L begins to open. The interlock mechanism 50 is fixed to a latch 51 that is swingably supported by the hold door and a wall surface on the landing hall side. In the state where the latch 51 is engaged with the hook 52 as shown in FIG.
A pair of upper and lower rollers 53 and 54 are provided on the base end side of the latch 51, and the horizontal interval between the fixed vane 21 and the movable vane 22 is expanded to W1 with the car door 3L closed. In this state, the rollers 53, 54, the fixed vane 21 and the movable vane 22 do not contact each other, and the latch 51 remains engaged with the hook 52.

On the other hand, as shown in FIG. 4, when the car door 3L starts to open, the roller 53 is pushed in the door opening direction by the fixed vane 21, so that the latch 51 rotates counterclockwise around the axis of the roller 54. Swings in the direction and the engagement with the hook 52 is released.
When the car door 3L is further opened and the roller 32 rolls on the horizontal surface 31b of the cam rail 31, the movable vane 22 is lifted, so that the horizontal interval between the fixed vane 21 and the movable vane 22 is W2. Narrow.
As a result, the rollers 53 and 54 are sandwiched between the vanes 21 and 22, so that the hold door is opened and closed integrally with the car door 3L.

Incidentally, as shown in FIG. 3, when the car door 3 </ b> L is closed, the roller 32 is always in contact with the inclined surface 31 a of the cam rail 31.
At this time, since the weight 34 constantly biases the movable vane 22 downward, the roller 22 is pressed against the inclined surface 31a of the cam rail 31, and therefore receives the reaction force S from the inclined surface 31a.
This reaction force S can be broken down into a vertical component force V in the vertical direction and a horizontal component force H. The magnitude of the upward component force V depends on the weight of the weight 34 and the weight of the movable vane 22. Is approximately equal to the value W of the total.
Therefore, when the value of the inclination angle of the inclined surface 31a with respect to the horizontal surface 31b is θ, the magnitude of the horizontal component force H can be expressed as H = V · tan θ = W · tan θ.

The horizontal component H of the reaction force S is transmitted to the left car door 3L via the roller 32, the bracket 33, the movable vane 22, the first link members 23, 24, and the fixed vane 21, and the left side The car door 3L is urged in the closing direction.
Thus, by appropriately adjusting the weight of the weight 34, the urging force A in the door closing direction can be applied to the car door so that passengers in the car cannot open the car door 3L intentionally. 3L can be applied.
When a passenger in the car intentionally tries to open the right car door 3R, the left car door 3L is opened via the drive belt 14, so the left car door 3L is tried to be opened. It will work exactly as it does.

On the other hand, when the drive motor 11 is operated to open the pair of left and right car doors 3L and 3R, the fixed vane 21 connected to the drive belt 14 via the bracket 16 is pushed in the door opening direction. 3L is pushed in the door opening direction.
Then, the force that pushes the car door 3L in the door opening direction is transmitted to the movable vane 22 via the pair of upper and lower first link members 23, 24, so that the roller 32 receives from the inclined surface 31a of the cam rail 31. It is displaced in the door opening direction against the horizontal component force H in the door closing direction, and climbs the inclined surface 31a.
When the roller 32 moves from the inclined surface 31a of the cam rail 31 onto the horizontal plane 31b, the vertical upward reaction force S acting on the roller 32 from the horizontal plane 31b does not include the horizontal component force H in the door closing direction. The urging force A in the closing direction does not act on the car door 3L.
Accordingly, the door drive mechanism 10 can smoothly open the car doors 3L and 3R.

In other words, the biasing force A in the door closing direction acts on the car door 3L only when the roller 32 is in contact with the inclined surface 31a, and the car door 3L covers the entire range of the opening / closing stroke of the car door 3L. However, the biasing force in the closing direction does not act.
Thereby, the fall of the drive efficiency of the door drive mechanism 10 which opens and closes the car door 3L can be suppressed to the minimum.
Further, the force A for urging the car door 3L in the closing direction is constant while the roller 32 rolls on the inclined surface 31a of the cam rail 31, so that the urging force in the door closing direction is stably obtained. be able to.

Further, in the door device 100 of the first embodiment, a signal indicating that the car door 3R is closed is output from the door opening / closing detection mechanism 40 in a range where the roller 32 is in contact with the inclined surface 31a. It has become.
Thus, a signal indicating that the car door 3R is opened is output from the door opening / closing detection mechanism 40 until the roller 32 changes from the inclined surface 31a to the horizontal surface 31b and the urging force in the door closing direction does not act on the car door 3L. Therefore, it can be reliably detected that the car door 3R is being opened beyond a predetermined stroke.

First Modification Next, a first modification of the door device of the first embodiment described above will be described with reference to FIG.
In the door device 110 according to the first modification, the cam rail includes a fixed portion 35 having a horizontal surface 35a, an adjustment portion 36 having an inclined surface 36a, and a connecting member 37 that smoothly connects the horizontal surface 35a and the inclined surface 36a. It consists of and.
The adjustment portion 36 has a round hole 36b and a long hole 36c through which the door bolt B for fixing the adjustment portion 36 to the machine base 1 can be inserted, and the inclination angle of the inclined surface 36a with respect to the horizontal surface 35a. Can be adjusted freely.
Further, the connection member 37 is formed in a curved plate shape, and both ends thereof are inserted into groove portions respectively recessed at the end portions of the fixed portion 35 and the adjustment portion 36, so that the roller 32 has a horizontal surface 35 a and an inclined surface. It can roll smoothly between 36a.

  That is, in the door device 110 of the first modified example, the weight 34 attaches the movable vane 22 downward by changing the fixing position of the adjustment portion 36 with respect to the machine base 1 and adjusting the inclination angle of the inclined surface 36a. Separately from the adjustment of the magnitude of the biasing force to be biased, the magnitude of the biasing force that biases the car door 3L in the closing direction can be easily adjusted.

Second Modification Next, a second modification of the door device of the first embodiment described above will be described with reference to FIG.
In the door device 120 of the second modified example, the cam rail 38 includes a horizontal surface 38a, a first inclined surface 38b having a large inclination angle θ2 with which the roller 32 abuts when the car door 3L is closed, A second inclined surface 38c having a small value of the inclination angle θ2 is provided between the first inclined surface 38b and the horizontal surface 38a.

  Thereby, even when the inclination angle θ1 of the first inclined surface 38b is increased and the urging force in the door closing direction with respect to the car door 3L is increased, the roller 32 changes the second inclined surface 38c from the first inclined surface 38b. Therefore, the car door 3L can be opened smoothly.

Third Modification Next, a third modification of the door device of the first embodiment described above will be described with reference to FIG.
In the door device 130 of the third modified example, the urging means for urging the movable vane 22 downward is replaced by a tension member interposed between the car door 3L and the movable vane 22 instead of the weight 34. A coil spring 39 is provided.
As a result, the door device 130 operates in exactly the same manner as the door device 100 of the first embodiment.
Instead of the tension coil spring 39, a compression coil spring can be used, or a spring having a different form from the coil spring or an elastic body such as rubber can be used.
Furthermore, these springs and the like can be connected not to the movable vane 22 but to the first link members 23 and 24.

Second Embodiment Next, an elevator door device according to a second embodiment will be described in detail with reference to FIGS. 8 and 9.
The door device 200 of the second embodiment is obtained by replacing the door engagement mechanism 20 in the door device 100 of the first embodiment shown in FIG. 1 with a door engagement mechanism 60 having a different structure, and the other parts. It has the same structure.

The door engaging mechanism 60 has a structure in which the first and second movable vanes 61 and 62 are supported by a parallel link mechanism including a pair of upper and lower second link members 63 and 64.
These second link members 63 and 64 are pivotally supported by support shafts 63a and 64a at the center in the longitudinal direction with respect to the bracket 65 fixed to the car door 3L, and one swinging end is supported by the second link members 63 and 64. The first movable vane 61 is pivotally supported through the shafts 61a and 61b, and the other swing end is pivotally supported by the second movable vane 62 through the support shafts 62a and 62b.
As a result, when the first movable vane 61 is raised, the second movable vane 62 is lowered, and when the first movable vane 61 is lowered, the second movable vane 62 is raised.
As shown in FIG. 8, when the car door 3L is closed, the second link members 63 and 64 have the end portion on the first movable vane 61 side than the end portion on the second movable vane 62 side. The inclination angle is set so as to be higher, in other words, lowering to the right.

The first movable vane 61 is a member corresponding to the movable vane 22 of the door engagement mechanism 20 described above, and supports the roller 32 that rolls on the inclined surface 31 a and the horizontal surface 31 b of the cam rail 31 via the bracket 33. The weight 71 is attached and is always urged downward.
Since the second link members 63 and 64 act like a seesaw so that the weights of the first and second movable vanes 61 and 62 are balanced with each other, the weight of the weight 71 is the same as that of the weight 34 in the first embodiment described above. It must be set to be heavier than the weight.

The second movable vane 62 is a member corresponding to the fixed vane 21 of the door engagement mechanism 20 described above, but is supported so as to be movable up and down with respect to the car door 3L. The structure for connecting to the lower portion 14b of the door drive member 14 is changed.
More specifically, a long hole 62c extending in the vertical direction is provided at the upper end portion of the second movable vane 62, and protrudes from the bracket 17 fixed to the lower portion 14b of the drive belt 14. A pair of upper and lower pins 17a and 17b provided are received.
Accordingly, the second movable vane 62 can be displaced in the door opening / closing direction integrally with the drive belt 14 while being movable up and down with respect to the car door 3L.

As shown in FIG. 8, when the car door 3 </ b> L is closed, the roller 32 is always in contact with the inclined surface 31 a of the cam rail 31.
At this time, since the weight 71 constantly urges the first movable vane 61 downward, the roller 32 is pressed against the inclined surface 31a of the cam rail 31, and thus receives the reaction force S from the inclined surface 31a.
The horizontal component of the reaction force S in the door closing direction is applied to the car door via the roller 32, the bracket 33, the first movable vane 61, the second link members 63 and 64, the support shafts 63a and 64a, and the bracket 65. 3L, and urges the left car door 3L in the closing direction.
Thus, by appropriately adjusting the weight of the weight 71, the car door 3L is urged in the closing direction so that a passenger in the car cannot easily open the car door 3L even if the car door 3L is intentionally opened. be able to.

  When a passenger in the car intentionally tries to open the right car door 3R, the left car door 3L is opened via the drive belt 14, so the left car door 3L is tried to be opened. It will work exactly as it does.

On the other hand, when the car door 3L is opened by operating the drive motor 11, the second movable vane 62 connected to the lower portion 14b of the drive belt 14 via the bracket 17 is connected to the car door 3L. It is displaced in the door opening direction (left direction in the figure).
At this time, as described above, the second link members 63 and 64 are inclined so that the support shafts 61a and 61b with respect to the first movable vane 61 are higher than the support shafts 63a and 64a with respect to the bracket 35. Therefore, as the second movable vane 62 is displaced in the door opening direction, it swings around the supporting shafts 63a and 64a in the clockwise direction in the drawing.
As a result, the first movable vane 61 rises at the same time as the second movable vane 62 descends, so that the roller 32 rises from the inclined surface 31 a of the cam rail 31.
Then, since the urging force in the door closing direction does not act on the first movable vane 61, the door drive mechanism 10 can smoothly open the car door 3L.

As shown in FIG. 9, when the car door 3L is further opened and the roller 32 rolls on the horizontal plane 31b of the cam rail 31, the first movable vane 61 is further raised, so the first and first The horizontal distance between the two movable vanes 61 and 62 is reduced to W2.
As a result, the rollers 53 and 54 of the interlock mechanism are held between the vanes 61 and 62, so that the hold door (not shown) is opened integrally with the car door 3L.

That is, in the door device 200 according to the second embodiment, when a passenger in the car intentionally opens the car door 3L, the urging force in the door closing direction acts on the car door 3L. When the car door 3L is opened using 10, the urging force in the door closing direction does not act on the car door 3L.
As a result, the door drive mechanism 10 that opens and closes the car door 3L does not need to output a driving force that can overcome the urging force in the door closing direction. Efficiency is not reduced.

Fourth Modification Next, a modification of the door device of the second embodiment described above will be described with reference to FIG.
In the door device 210 of this modification, instead of the weight 71 provided in the first movable vane 61, a tension coil spring 72 for urging the second movable vane 62 upward is provided in the car door 3L. And the second link member 64.
Thus, when the second movable vane 62 is urged upward by the tension coil spring 72, a downward urging force acts on the first movable vane 61 due to the swinging of the second link members 63, 64. The door device 210 of the fourth modified example operates in the same manner as the door device 200 of the second embodiment.
Instead of the tension coil spring 72, a compression coil spring can be used, or a spring having a different form from the coil spring or an elastic body such as rubber can be used.
Further, these springs and the like can be connected not to the second link member 64 but to the second movable vane 62.

Third Embodiment Next, an elevator door apparatus according to a third embodiment will be described in detail with reference to FIG.

The door device 300 according to the third embodiment uses a cam rail 81 obtained by inverting the vertical direction of the cam rail 31 in the door device 100 according to the first embodiment shown in FIG. Are almost identical.
More specifically, the cam rail 81 has an inclined surface 81a that faces obliquely downward to the right, and a horizontal surface 81b that is connected to the inclined surface 81a and faces downward.
The movable vane 22 urged upward by the tension coil spring 73 supports a roller 32 that can roll on the inclined surface 81 a and the horizontal surface 81 b by a bracket 33.
In other words, the pair of upper and lower first link members 23, 24 that support the movable vane 22 so as to move up and down is, in other words, such that the pivot point for the movable vane 22 is lower than the pivot point for the fixed vane 21. The inclination angle is set so as to be a left shoulder.

At this time, as shown in FIG. 11, when the car door 3 </ b> L is closed, the roller 32 is always in contact with the inclined surface 81 a of the cam rail 81.
Further, since the tension coil spring 73 always urges the movable vane 22 upward, the roller 32 is pressed against the inclined surface 81a of the cam rail 81, and thus receives a reaction force from the inclined surface 81a.
Then, the horizontal component of the reaction force in the door closing direction is transmitted to the left car door 3L via the roller 32, the bracket 33, the movable vane 22, the first link members 23 and 24, and the fixed vane 21, and the left side. The car door 3L is urged in the closing direction.
Thus, by appropriately adjusting the tensile force of the tension coil spring 73, the car door 3L is closed in the closing direction so that a passenger in the car cannot easily open the car door 3L even if the car door 3L is intentionally opened. Can be energized.

Fourth Embodiment Next, an elevator door device according to a fourth embodiment will be described in detail with reference to FIG.

The door device 400 of the fourth embodiment uses a cam rail 81 in which the vertical direction of the cam rail 31 in the door device 200 of the second embodiment shown in FIG. 8 is reversed, and the structure of the other parts Are almost identical.
More specifically, the cam rail 81 has an inclined surface 81a that faces obliquely downward to the right, and a horizontal surface 81b that is connected to the inclined surface 81a and faces downward.
Further, since the second movable vane 62 is biased downward by the tension coil spring 74, the first movable vane 61 is biased upward by the swinging of the second link members 63 and 64, and the roller 32 is moved. The cam rail 81 is pressed against the inclined surface 81a.
As shown in FIG. 12, when the car door 3L is closed, the second link members 63 and 64 have an end on the first movable vane 61 side that is closer to an end on the second movable vane 62 side. Also, the inclination angle is set so as to be lower, in other words, the left shoulder is lowered.

At this time, as shown in FIG. 12, when the car door 3 </ b> L is closed, the roller 32 is always in contact with the inclined surface 81 a of the cam rail 81.
Thereby, the horizontal component force in the door closing direction of the reaction force received by the roller 32 from the inclined surface 81a is the roller 32, the bracket 33, the first movable vane 61, the second link members 63 and 64, the support shafts 63a and 64a, and This is transmitted to the car door 3L via the bracket 65, and the left car door 3L is urged in the closing direction.
Thus, by appropriately adjusting the tensile force of the tension coil spring 74, the car door 3L is closed in the closing direction so that a passenger in the car cannot easily open the car door 3L even if the car door 3L is intentionally opened. Can be energized.

On the other hand, when the car door 3L is opened by operating the drive motor 11, the second movable vane 62 connected to the lower portion 14b of the drive belt 14 via the bracket 17 is connected to the car door 3L. It is displaced in the door opening direction (left direction in the figure).
At this time, the inclination angles of the second link members 63 and 64 are set so that the support shafts 62 a and 62 b for the second movable vane 62 are higher than the support shafts 63 a and 64 a for the bracket 35. Therefore, the second movable vane 62 swings in the clockwise direction in the drawing in accordance with the displacement in the door opening direction.
As a result, the first movable vane 61 descends at the same time as the second movable vane 61 rises, so that the roller 32 is separated downward from the inclined surface 81 a of the cam rail 81.
Then, since the urging force in the door closing direction does not act on the first movable vane 61, the door drive mechanism 10 can smoothly open the car door 3L.

That is, in the door device 400 of the fourth embodiment, when the passenger in the car intentionally opens the car door 3L, the urging force in the door closing direction acts on the car door 3L. , 3R cannot be opened easily.
In contrast, when the car door 3L is opened using the door drive mechanism 10, the urging force in the door closing direction does not act on the car doors 3L and 3R. Drive efficiency does not decrease.

Next, with reference to FIG. 13, the structure of the weight 34 used for the door apparatus 100 of 1st Embodiment is demonstrated.
The weight 34 as the biasing means for biasing the movable vane downward in the door device 100 is movable vane by the bolt B while superposing a large number of rectangular plate weights 34a as shown in a sectional view in FIG. The structure is integrally fastened to 22.
Accordingly, the overall weight of the weight 34 can be freely adjusted by increasing or decreasing the number of weight plates 34a to be overlapped. Therefore, the magnitude of the urging force for urging the movable vane 22 downward, and the cage The magnitude of the urging force that urges the door 3L in the closing direction can be freely adjusted.

As mentioned above, although each embodiment and each modification of the elevator which concern on this invention were demonstrated in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible.
For example, in each of the above-described embodiments and modifications, the pair of left and right car doors 3L and 3R are double-open doors that open in the left-right direction, but instead of single-open single doors or single-open double doors. Needless to say, the present invention can be applied.

The front view which shows the whole door apparatus of 1st Embodiment. The front view which shows the door apparatus shown in FIG. 1 in a door closed state. The figure explaining the reaction force which acts on a roller. The principal part enlarged front view which shows the door apparatus shown in FIG. 1 in a door open state. The principal part enlarged front view which shows the door apparatus of a 1st modification. The principal part enlarged front view which shows the door apparatus of a 2nd modification. The front view which shows the door apparatus of a 3rd modification. The front view which shows the door apparatus of 2nd Embodiment in a door closed state. The front view which shows the door apparatus of 2nd Embodiment in a door open state. The front view which shows the door apparatus of a 4th modification. The front view which shows the door apparatus of 3rd Embodiment. The front view which shows the door apparatus of 4th Embodiment. Sectional drawing which shows the structure of a weight.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine bed 2 Hanger rail 3L, 3R Car door 4L, 4R Hanger 5 Hanger roller 10 Door drive mechanism 11 Drive motor 12 Drive sheave 13 Driven sheave 14 Drive belt (door drive member)
15, 16, 17 Bracket 20 Door engagement mechanism 21 Fixed vane 22 Movable vane (movable member)
23, 24 First link member 30 Door biasing mechanism 31 Cam rail 32 Roller 33 Bracket 34 Weight (biasing means)
35 Cam rail fixing portion 36 Cam rail adjusting portion 37 Connecting member 38 Cam rail 38a Horizontal plane 38b Second inclined surface 38c First inclined surface 40 Door opening / closing detection mechanism 41 Switch cam 42 Arm 43 Roller 50 Interlock mechanism 51 Latch 52 Hook 53 , 54 roller 60 door engagement mechanism 61 first movable vane (second movable member)
62 Second movable vane (movable member)
63, 64 Second link member 65 Bracket 71 Weight 72, 73, 74 Tension coil spring 81 Cam rail 81a Inclined surface 81b Horizontal plane 100 Elevator door device 200 of the first embodiment Elevator door device 300 of the second embodiment Third implementation Elevator door device 400 of the form Elevator door device of the fourth embodiment

Claims (10)

A door device capable of energizing an elevator car door in a closing direction,
A cam rail extending in the opening / closing direction of the car door;
A movable member supported by the car door via a link mechanism so as to be movable up and down;
A roller rotatably supported by the movable member that rolls on the surface of the cam rail when the car door opens and closes;
Urging means for urging the movable member to press the roller against the surface of the cam rail,
The cam rail is provided with an inclined surface that applies a reaction force including a horizontal component force that urges the car door in the closing direction to the roller, and extends from the end of the inclined surface in the opening direction of the car door. A horizontal plane,
The position of the inclined surface is determined so that the roller always comes into contact with the car door when the car door is closed. The cam rail includes a fixed portion having the horizontal surface and an adjustment portion having the inclined surface.
2. The elevator door device according to claim 1, wherein the adjustment portion is fixed to the car door so as to be adjustable in position so that an inclination angle of the inclined surface with respect to the horizontal plane can be adjusted.   The inclined surface has a first inclined surface having a large inclination angle with which the roller contacts when the car door is closed, and an inclination angle interposed between the first inclined surface and the horizontal plane. The elevator door device according to claim 1, further comprising a small second inclined surface.   The link mechanism includes a pair of upper and lower first link members that are pivotally supported in parallel with each other, the base ends of which are pivotally supported by the car doors and the swinging ends of the link mechanisms are pivotally supported by the movable members. The elevator door device according to claim 1, wherein the elevator door device is provided.   The link mechanism has a pair of upper and lower portions that are pivotably supported in parallel with each other, with an intermediate portion in the longitudinal direction pivotally supported by the car door and one swinging end pivotally supported by the movable member. The elevator door device according to claim 1, further comprising a second link member. The movable member is urged by the urging means and is supported so as to be displaced downward,
2. The elevator door device according to claim 1, wherein the cam rail is configured such that the horizontal plane faces upward and the inclined surface faces obliquely upward. 3. The movable member is supported so as to be displaced upwardly by being biased by the biasing means,
2. The elevator door device according to claim 1, wherein the cam rail is configured such that the horizontal plane faces downward and the inclined surface faces obliquely downward.   2. The elevator door device according to claim 1, wherein the urging means is a weight formed by integrally fastening a plurality of plate-like members.   2. The elevator door device according to claim 1, wherein the biasing means is a spring interposed between the car door and the movable member. Further comprising detecting means for detecting opening and closing of the car door;
When the signal output from the detection means changes from a state indicating that the car door is closed to a state indicating that the car door is opened, the roller is still in contact with the inclined surface. The elevator door device according to claim 1, wherein a position of the inclined surface is determined.

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