DOOR ENGAGEMENT DEVICE FOR ELEVATOR

Abstract

 In a door engaging device for an elevator, first and second engagement members are provided to a car door through an intermediation of a plurality of interlocking link mechanisms. The interlocking link mechanisms displace the first and second engagement members in an interlocked manner to change a distance between the first and second engagement members. A power transmission body is moved in a direction in which the car door opens and closes by a drive motor for opening and closing the car door. A transmission body connecting portion connected to the power transmission body is provided on the first engagement member. The interlocking link mechanisms displace the first engagement member in parallel to the direction in which the car door opens and closes by movement of the power transmission body.

Description

Technical Field

[0001] The present invention relates to a door engaging device for driving a car door and a landing door of an elevator in synchronization.

Background Art

[0002] In a conventional door engaging device for an elevator, first and second runners are interlocked by a pair of link mechanisms to be engaged with and disengaged from an engagement roller of a landing door. Each of the link mechanisms includes an adjusting element turnably provided to a car door and an articulation member turnably connected to one end of the adjusting element. Each of the articulation members is turnably connected to the first runner. The other end of each of the adjusting elements is turnably connected to the second runner. The adjusting elements are connected to a drive belt which is circulated by a drive motor. Then, the circulation of the drive belt turns the adjusting elements to open and close the first and second runners (for example, see Patent Document 1).

[0003] 

Patent Document 1: JP 2005-170680 A

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] In the conventional door engaging device as described above, the drive belt is connected to the adjusting elements, and the circulation of the drive belt turns the adjusting elements. Therefore, a connecting portion of the drive belt to each of the adjusting elements is pushed down from an ideal straight track by the turn of the adjusting elements. As a result, a tension of the drive belt is increased. Moreover, the first and second runners are vertically displaced while being opened and closed, and hence it is necessary to ensure an escape space above and below the first and second runners. Further, an operation of the drive belt is transferred to the first and second runners through the adjusting elements, and hence the movement of the drive belt is not in synchronization with that of the first and second runners. Thus, it is difficult to adjust a speed of opening and closing the first and second runners.

[0005] The present invention is devised to solve the problems described above, and has an object of providing a door engaging device for an elevator, which is capable of more linearly moving a power transmission body, reducing the amount of vertical displacement of first and second engagement members, and synchronizing movement of the first and second engagement members with that of the power transmission body.

Means for Solving the Problems

[0006] A door engaging device for an elevator according to the present invention includes: a first engagement member and a second engagement member provided to a car door to be engaged with a landing door-side engagement portion provided to a landing door by changing a distance therebetween in a direction in which the car door opens and closes; and a plurality of interlocking link mechanisms provided to the car door at a vertical distance from each other to support the first engagement member and the second engagement member and displace the first engagement member and the second engagement member in an interlocked manner, thereby changing the distance between the first engagement member and the second engagement member, in which the first engagement member is provided with a transmission body connecting portion to be connected to a power transmission body moved in the direction in which the car door opens and closes by a drive motor for opening and closing the car door, and the interlocking link mechanisms displace the first engagement member in parallel to the direction in which the car door opens and closes by movement of the power transmission body.

Brief Description of the Drawings

[0007] 

FIG. 1 is a front view illustrating a door engaging device for an elevator according to a first embodiment of the present invention as viewed from a landing side.

FIG. 2 is a front view illustrating a state where a distance between first and second engagement members illustrated in FIG. 1 is reduced.

FIG. 3 is a front view illustrating a door engaging device for an elevator according to a second embodiment of the present invention as viewed from the landing side.

FIG. 4 is a front view illustrating a door engaging device for an elevator according to a third embodiment of the present invention as viewed from the landing side.

FIG. 5 is a front view illustrating a door engaging device for an elevator according to a fourth embodiment of the present invention as viewed from the landing side.

FIG. 6 is a front view illustrating a door engaging device for an elevator according to a fifth embodiment of the present invention as viewed from the landing side.

FIG. 7 is a front view illustrating a door engaging device for an elevator according to a sixth embodiment of the present invention as viewed from the landing side.

Best Mode for Carrying Out the Invention

[0008] Hereinafter, preferred embodiments of the present invention are described with reference to the drawings.

First Embodiment

[0009] FIG. 1 is a front view illustrating a door engaging device for an elevator according to a first embodiment of the present invention as viewed from a landing side. In the drawing, a base plate 2 is fixed to an upper part of a car door 1. A first engagement member (driving-side engaging vane) 3 and a second engagement member (driven-side engaging vane) 4 are provided to the base plate 2. Longitudinal directions of the first engagement member 3 and the second engagement member 4 are vertically parallel to each other.

[0010] The first engagement member 3 and the second engagement member 4 are arranged at a distance from each other in a direction in which the car door 1 opens and closes (horizontal direction of FIG. 1). The distance between the first engagement member 3 and the second engagement member 4 is variable. When a car is moved into a door zone, an engagement roller 5 corresponding to a landing door-side engagement portion provided to a landing door (not shown) is positioned between the first engagement member 3 and the second engagement member 4. By changing the distance between the first engagement member 3 and the second engagement member 4 in this state, the first engagement member 3 and the second engagement member 4 are engaged with the engagement roller 5.

[0011] In this example, a reduction of the distance between the first engagement member 3 and the second engagement member 4 allows the first engagement member 3 and the second engagement member 4 to be engaged with the engagement roller 5, that is, to interpose the engagement roller 5 therebetween, as illustrated in FIG. 2. As a result, the car door 1 and the landing door are moved in synchronization. Moreover, an increase of the distance between the first engagement member 3 and the second engagement member 4 disengages the first engagement member 3 and the second engagement member 4 from the engagement roller 5, as illustrated in FIG. 1.

[0012] A connection fitting 6 corresponding to a transmission body connecting portion is fixed to an upper part of the first engagement member 3. An upper end of the connection fitting 6 is connected to a drive belt 7 corresponding to a power transmission body. The drive belt 7 is circulated by a drive motor (not shown) corresponding to a drive source for opening and closing the car door 1. As a result, a connecting portion of the drive belt 7 to the connection fitting 6 is moved in a direction in which the car door 1 opens and closes. Specifically, an operation of the drive belt 7 is transmitted to the car door 1 through operations of the first engagement member 3 and the second engagement member 4.

[0013] The first engagement member 3 and the second engagement member 4 are supported on the base plate 2 through an intermediation of an upper interlocking link mechanism 8 and a lower interlocking link mechanism 9. The interlocking link mechanisms 8 and 9 are mounted to the base plate 2 at a vertical distance from each other.

[0014] The interlocking link mechanisms 8 and 9 displace the first engagement member 3 and the second engagement member 4 in an interlocked manner to change the distance between the first engagement member 3 and the second engagement member 4. Further, the interlocking link mechanisms 8 and 9 displace, by the movement of the drive belt 7, the first engagement member 3 in a direction parallel to the direction in which the car door 1 opens and closes.

[0015] The upper interlocking link mechanism 8 and the lower interlocking link mechanism 9 have the same structure. Each of the interlocking link mechanisms 8 and 9 includes a floating support arm 10 and a turning support arm 11. The floating support arm 10 includes a first engagement member connecting portion 10a turnably connected to the first engagement member 3. The turning support arm 11 includes a floating support arm connecting portion 11a turnably connected to the floating support arm 10 and a second engagement member connecting portion 11a turnably connected to the second engagement member 4.

[0016] Each of the turning support arms 11 is supported on the car door 1 to be turnable on a portion between the floating support arm connecting portion 11a and the second engagement member connecting portion 11b. Specifically, an intermediate portion of each of the turning support arms 11 is turnably connected to a fixed shaft 12 fixed to the base plate 2.

[0017] A center of the turn of each of the turning support arms 11, that is, the fixed shaft 12, and the first engagement member connecting portion 10a are located at the positions which are equal in a vertical direction. The fixed shaft 12, the floating support arm connecting portion 11a, and the first engagement member connecting portion 10a form an isosceles triangle having the floating support arm connecting portion 11a as an apex regardless of the distance between the first engagement member 3 and the second engagement member 4.

[0018] A guide mechanism 13 for limiting the movement of the first engagement member 3 to a horizontal direction is provided between the base plate 2 and the first engagement member 3. The guide mechanism 13 has a structure in which a guide pin 14 fixed to the first engagement member 3 is fitted into a slit 2a provided in the base plate 2. The slit 2a is provided to be parallel to the direction in which the car door 1 opens and closes.

[0019] Moreover, the guide mechanism 13 supports a weight of the first engagement member 3 and also supports a force of lifting up the first engagement member 3, which is transmitted from the turning support arms 11 by a weight of the second engagement member 4, to prevent the drive belt 7 from being deflected to misalign the position of the first engagement member connecting portion 10a and that of the fixed shaft 12 from each other in a vertical direction.

[0020] A cam portion 11c is provided to the intermediate portion of each of the turning support arms 11. At an end of the cam portion 11c, a lock portion (step portion) 11d is provided. A latch 15 to be engaged with the cam portion 11c of the upper interlocking link mechanism 8 is turnably attached to the base plate 2. A compression spring 16 for pressing the latch 15 against the cam portion 11c is provided between the base plate 2 and the latch 15.

[0021] When the first engagement member 3 is displaced in a door-opening direction, and the turning support arms 11 are turned in a counterclockwise direction of FIG. 1, the latch 15 is engaged with the lock portion 11d as illustrated in FIG. 2. As a result, the turn of the turning support arms 11 in a clockwise direction of FIG. 2 is restricted. Then, even when the drive belt 7 is moved in a door-closing direction, a state where the first engagement member 3 and the second engagement member 4 are engaged with the engagement roller 5 is maintained.

[0022] The car is provided with an unlock rod 17 for disengaging the latch 15 from the lock portion 11d. When the car door 1 is moved in the door-closing direction from a state illustrated in FIG. 2, an end of the latch 15 abuts against the unlock rod 17. Then, when the car door 1 is further moved in the door-closing direction, the turning support arm 11 is turned in the counterclockwise direction of FIG. 2 against the compression spring 16 to disengage the latch 15 from the lock portion 11d.

[0023] Next, an operation is described. When a drive motor is rotated in the door-opening direction from the door-closed state illustrated in FIG. 1, the drive belt 7 attached to a motor shaft through an intermediation of a pulley (not shown) is moved in the door-opening direction to also move the first engagement member 3 in the door-opening direction. As a result, each of the floating support arm connecting portions 11a is pushed up, whereas each of the turning support arms 11 is turned on the fixed shaft 12 in the counterclockwise direction of the drawing, thereby pushing out the second engagement member 4 in the door-closing direction.

[0024] By the movement as described above, the distance between the first engagement member 3 and the second engagement member 4 is reduced with the rotation of the drive motor when the door opens. Then, the engagement roller 5 is fixed between the first engagement member 3 and the second engagement member 4, as illustrated in FIG. 2. When the drive belt 7 is further moved in the door-opening direction from the state illustrated in FIG. 2, the force of the drive belt 7 is transmitted to the car door 1 to allow the car door 1 and the landing door to start opening.

[0025] During an opening operation of the car door 1, the latch 15 is engaged with the lock portion 11d. Therefore, even when a force is applied in the door-closing direction due to a disturbance, the first engagement member 3 and the second engagement member 4 do not open. Therefore, the movement of the car door 1 and the movement of the landing door are stably in synchronization.

[0026] When the door closes, the drive belt 7 is moved in the door-closing direction by the rotation of the drive motor. At this time, the latch 15 is engaged with the lock portion 11d and the engagement roller 5 is interposed between the first engagement member 3 and the second engagement member 4, and hence the movement of the drive belt 7 is directly transmitted to the car door 1 and the landing door. As a result, the car door 1 and the landing door are moved in the door-closing direction.

[0027] After that, when the car door 1 is moved to just before a full-closed position of the door, the latch 15 is disengaged from the lock portion 11d by the unlock rod 17. Thus, the landing door loses a fixing force by the first engagement member 3 and the second engagement member 4 to lose a force in the door-closing direction from the drive belt 7. However, the landing door is constantly biased in the door-closing direction by a door closer (not shown). Therefore, after the first engagement member 3 and the second engagement member 4 are disengaged from the engagement roller 5, the landing door is fully closed by a function of the door closer.

[0028] On the other hand, the car door 1 follows the movement of the first engagement member 3 due to inertia to be fully closed. Even after the car door 1 is fully closed to be unmovable, the drive belt 7 moves in the door-closing direction until the first engagement member 3 and the second engagement member 4 return to the state illustrated in FIG. 1 with the movement in the direction opposite to that performed when the door opens, thereby completing the door closing operation.

[0029] In the elevator as described above, the connection fitting 6 to be connected to the drive belt 7 is provided to the first engagement member 3, whereas the interlocking link mechanisms 8 and 9 displace the first engagement member 3 in parallel to the direction in which the car door 1 opens and closes, by the movement of the drive belt 7. Therefore, the drive belt 7 can be more linearly moved to prevent the tension of the drive belt 7 from being fluctuated.

[0030] Moreover, the amount of vertical displacement of the first engagement member 3 can be reduced. Therefore, a space for locating the first engagement member 3 can be reduced to achieve space-saving. Further, the movement of the first engagement member 3 and the second engagement member 4 can be synchronized with the movement of the drive belt 7. As a result, a speed of opening and closing the first engagement member 3 and the second engagement member 4 and a speed of opening and closing the car door 1 can be easily controlled.

[0031] Further, each of the interlocking link mechanisms 8 and 9 includes the floating support arm 10 and the turning support arm 11, and hence the first engagement member 3 and the second engagement member 4 can be interlocked with each other in a simple structure.
Moreover, the fixed shaft 12 and the first engagement member connecting portion 10a are located at the positions which are equal in the vertical direction. In addition, the fixed shaft 12, the floating support arm connecting portion 11a, and the first engagement member connecting portion 10a form the isosceles triangle having the floating support arm connecting portion 11a as the apex. Therefore, with the simple structure, the first engagement member 3 can be displaced in parallel to the direction in which the car door 1 opens and closes.
Further, the movement of the first engagement member 3 is limited by the guide mechanism 13 to the horizontal direction, and hence the vertical movement of the first engagement member 3 and the second engagement member 4 due to the weight of the first engagement member 3 or the second engagement member 4 can be more surely prevented.

[0032] The distance between the fixed shaft 12 and the floating support arm connecting portion 11a and the distance between the floating support arm connecting portion 11a and the first engagement member connecting portion 10a are not necessarily required to be equal to each other. When the distance between the fixed shaft 12 and the floating support arm connecting portion 11a and the distance between the floating support arm connecting portion 11a and the first engagement member connecting portion 10a differ from each other, the range in which the first engagement member 3 can horizontally move is reduced. However, it is sufficient that the design is made to complete the engagement within the reduced range of movement.

Second Embodiment

[0033] Next, FIG. 3 is a front view illustrating a door engaging device for an elevator according to a second embodiment of the present invention as viewed from the landing side. In the drawing, a guide mechanism 18 for limiting the movement of the first engagement member 3 to the horizontal direction is provided between the base plate 2 and the first engagement member 3. The guide mechanism 18 includes a guide plate 19 provided to the base plate 2 and a guide roller 20 provided to the first engagement member 3, which is rolled along an upper surface of the guide plate 19. The upper surface of the guide plate 19 is provided in parallel to the direction in which the car door 1 opens and closes. The remaining configuration is the same as that of the first embodiment.

[0034] In the case where the weight of the second engagement member 4 is sufficiently light for stiffness of the drive belt 7, the drive belt 7 is scarcely deflected by the weight of the second engagement member 4, and therefore, there is a low possibility that the position of the first engagement member 3 is raised, the guide mechanism 18 for restricting only the downward displacement of the first engagement member 3 can be used. In this case, it is not necessary to fit the guide pin 14 into the slit 2a as in the first embodiment, and therefore, it is not necessary to adjust a clearance between the slit 2a and the guide pin 14. Thus, the positional adjustment at the time of fabrication and assembly of the components can be simplified.

[0035] In the case where the weight of the first engagement member 3 including the connection fitting 6 is sufficiently light for the stiffness of the drive belt 7, the drive belt 7 is scarcely deflected by the weight of the first engagement member 3, and therefore, there is a low possibility that the position of the first engagement member 3 is lowered, a guide mechanism obtained by vertically inverting the guide mechanism 18 illustrated in FIG. 3 may be used. In this case, the guide roller 20 is rolled along a lower surface of the guide plate 19, and only the upward displacement of the first engagement member 3 is restricted by the guide mechanism 18.

Third Embodiment

[0036] Next, FIG. 4 is a front view illustrating a door engaging device for an elevator according to a third embodiment of the present invention as viewed from the landing side. In the third embodiment, the guide mechanism 13 in the first embodiment is omitted. The remaining configuration is the same as that of the first embodiment.

[0037] In the case where the weight of the first engagement member 3 including the connection fitting 6 and the weight of the second engagement member 4 are sufficiently light for the stiffness of the drive belt 7, and there is a low possibility that the position of the first engagement member 3 vertically changes, the guide mechanisms 13 and 18 may be omitted as illustrated in FIG. 4. In this case, the first engagement member 3 can be horizontally moved using the drive belt 7 itself as a guide. As a result, the device can be simplified, while the cost thereof can be reduced.

Fourth Embodiment

[0038] Next, FIG. 5 is a front view illustrating a door engaging device for an elevator according to a fourth embodiment of the present invention as viewed from the landing side. In the drawing, the first engagement member 3 and the second engagement member 4 are supported on the base plate 2 through an intermediation of an upper interlocking link mechanism 21 and a lower interlocking link mechanism 22. The interlocking link mechanisms 21 and 22 are mounted to the base plate 2 at a vertical distance from each other.

[0039] The interlocking link mechanisms 21 and 22 displace the first engagement member 3 and the second engagement member 4 in an interlocked manner to change the distance between the first engagement member 3 and the second engagement member 4. Further, the interlocking link mechanisms 21 and 22 displace, by the movement of the drive belt 7, the first engagement member 3 in parallel to the direction in which the car door 1 opens and closes.

[0040] The upper interlocking link mechanism 21 and the lower interlocking link mechanism 22 have the same structure. Each of the interlocking link mechanisms 21 and 22 has a first floating support arm 23, a second floating support arm 24, and a turning support arm 25 connected between the first floating support arm 23 and the second floating support arm 24.

[0041] The first floating support arm 23 includes a first engagement member connecting portion 23a which is turnably connected to the first engagement member 3. The second floating support arm 24 includes a second engagement member connecting portion 24a which is turnably connected to the second engaging member 4.

[0042] The turning support arm 25 includes a first floating support arm connecting portion 25a turnably connected to the first floating support arm 23 and a second floating support arm connection portion 25b turnably connected to the second floating support arm 24.

[0043] Further, each of the turning support arms 25 is supported on the car door 1 to be turnable on a portion between the first floating support arm connecting portion 25a and the second floating support arm connecting portion 25b. Specifically, an intermediate portion of each of the turning support arms 25 is turnably connected to the fixed shaft 12 fixed to the base plate 2.

[0044] A center of the turn of each of the turning support arms 25, that is, the fixed shaft 12, the first engagement member connecting portion 23a, and the second engagement member connecting portion 24a are located at the position which are equal in the vertical direction. The fixed shaft 12, the first floating support arm connecting portion 25a, and the first engagement member connecting portion 23a form an isosceles triangle having the first floating support arm connecting portion 25a as an apex regardless of the distance between the first engagement member 3 and the second engagement member 4.

[0045] Moreover, the fixed shaft 12, the second floating support arm connecting portion 25b, and the second engagement member connecting portion 24a form an isosceles triangle having the second floating support arm connecting portion 25b as an apex regardless of the distance between the first engagement member 3 and the second engagement member 4.

[0046]  To an intermediate portion of the turning support arm 25 of the upper interlocking link mechanism 21, a camportion 25c is provided. At an end of the cam portion 25c, a lock portion (step portion) 25d is provided. The guide mechanism 13 for limiting the movement of the first engagement member 3 to the horizontal direction is provided between the base plate 2 and the first engagement member 3. The guide mechanism 13 is also provided between the base plate 2 and the second engagement member 4. The remaining configuration is the same as that of the first embodiment.

[0047] With the structure as described above, not only the first engagement member 3 but also the second engagement member 4 can horizontally move. As a result, the space for locating the second engagement member 4 can be reduced to achieve further space-saving.

[0048] In the case where the weight of the first engagement member 3 including the connection fitting 6 is sufficiently light for the stiffness of the drive belt 7, and therefore there is a low possibility that the position of the first engagement member 3 is lowered, the guide mechanism 13 of the first engagement member 3 can be omitted.

Fifth Embodiment

[0049] Next, FIG. 6 is a front view illustrating a door engaging device for an elevator according to a fifth embodiment of the present invention as viewed from the landing side. In the drawing, the first engagement member 3 and the second engagement member 4 are supported on the base plate 2 through an intermediation of an upper interlocking link mechanism 31 and a lower interlocking link mechanism 32. The interlocking link mechanisms 31 and 32 are mounted to the base plate 2 at a vertical distance from each other.

[0050] The interlocking link mechanisms 31 and 32 displace the first engagement member 3 and the second engagement member 4 in an interlocked manner to change the distance between the first engagement member 3 and the second engagement member 4. Further, the interlocking link mechanisms 31 and 32 displace, by the movement of the drive belt 7, the first engagement member 3 in parallel to the direction in which the car door 1 opens and closes.

[0051] The upper interlocking link mechanism 31 and the lower interlocking link mechanism 32 have the same pantograph structure. Each of the interlocking link mechanisms 31 and 32 has a pair of first floating support arms 33, a pair of second floating support arms 34, and a pair of turning support arms 35.

[0052] Each of the first floating support arms 33 includes a first engagement member connecting portion 33a which is turnably connected to the first engagement member 3, and the first floating support arms 33 are connected to the first engagement member 3 at the same position. Each of the second floating support arms 34 includes a second engagement member connecting portion 34a which is turnably connected to the second engaging member 4, and the second floating support arms 34 are connected to the second engagement member 4 at the same position.

[0053] The turning support arms 35 cross each other. The turning support arms 35 respectively include first floating support arm connecting portions 35a turnably connected respectively to the first floating support arms 33 and second floating support arm connection portions 35b turnably connected respectively to the second floating support arms 34. Each of the turning support arms 35 is supported on the car door 1 to be turnable on a portion between the first floating support arm connecting portion 35a and the second floating support arm connecting portion 35b. Specifically, an intermediate portion of each of the turning support arms 35 is turnably connected to the fixed shaft 12 fixed to the base plate 2.

[0054] A center of the turn of the turning support arms 35, that is, the fixed shaft 12, the first engagement member connecting portions 33a, and the second engagement member connecting portions 34a are located at the position which are equal in the vertical direction. The fixed shaft 12, each of the first floating support arm connecting portions 35a, and the first engagement member connecting portions 33a form an isosceles triangle having the first floating support arm connecting portion 35a as an apex regardless of the distance between the first engagement member 3 and the second engagement member 4.

[0055] Moreover, the fixed shaft 12, each of the second floating support arm connecting portions 35b, and the second engagement member connecting portions 34a form an isosceles triangle having the second floating support arm connecting portion 35b as an apex regardless of a distance between the first engagement member 3 and the second engagement member 4.

[0056] To an intermediate portion of the turning support arm 35 of the upper interlocking linkmechanism31, a camportion 35c is provided. At the cam portion 35c, a lock portion (step portion) 35d is provided. The remaining configuration is the same as that of the first embodiment.

[0057] With the structure as described above, not only the first engagement member 3 but also the second engagement member 4 can horizontally move. As a result, the space for locating the second engagement member 4 can be reduced to achieve further space-saving. Further, it is sufficient that the guide mechanism 13 is provided to only any one of the first engagement member 3 and the second engagement member 4.

[0058] In the case where the weight of the first engagement member 3 including the connection fitting 6 is sufficiently light for the stiffness of the drive belt 7, and therefore there is a low possibility that the position of the first engagement member 3 is lowered, the guide mechanism 13 can be omitted.

Sixth Embodiment

[0059] Next, FIG. 7 is a front view of a door engaging device for an elevator according to a sixth embodiment of the present invention as viewed from the landing side. In the first embodiment, the distance between the first engagement member 3 and the second engagement member 4 is reduced to cause the first engagement member 3 and the second engagement member 4 to be engaged with the engagement roller 5. On the other hand, in the sixth embodiment, the distance between the first engagement member 3 and the second engagement member 4 is increased to cause the first engagement member 3 and the second engagement member 4 to be engaged with a pair of engagement rollers 5a and 5b corresponding to landing door-side engagement portions. Moreover, by reducing the distance between the first engagement member 3 and the second engagement member 4, the first engagement member 3 and the second engagement member 4 are disengaged from the engagement rollers 5a and 5b, as illustrated in FIG. 7.

[0060] Even with the above-mentioned type of door engaging device, the same effects as those of the first to fifth embodiments can be obtained as long as the device structure has an arrangement which is bilaterally symmetric to those of FIGS. 1 to 6.

[0061] Although the first engagement member 3 and the second engagement member 4 are supported by the upper interlocking link mechanism 8, 21, or 31 and the lower interlocking link mechanism 9, 22, or 32 in the above-mentioned examples, the first engagement member 3 and the second engagement member 4 may be supported by three or more sets of interlocking link mechanisms.
Any landing door-side engagement portion may be used as long as it can be engaged with the first engagement portion 3 and the second engagement portion 4, and therefore, is not limited to the engagement rollers 5, 5a, and 5b.
Further, the power transmission body is not limited to the drive belt.
Further, the present invention is applicable to any of a single swing type door device and a double-door type door device.
Moreover, although the connection fitting 6 is connected to the first engagement member 3 in the above-mentioned examples, the first engagement member 3 and the connection fitting 6 may be integrated with each other.

Claims

1. A door engaging device for an elevator, comprising:

a first engagement member and a second engagement member provided to a car door to be engaged with an engagement roller provided to a landing door by changing a distance therebetween in a direction in which the car door opens and closes; and

a plurality of interlocking link mechanisms provided to the car door at a vertical distance from each other to support the first engagement member and the second engagement member and displace the first engagement member and the second engagement member in an interlocked manner, thereby changing the distance between the first engagement member and the second engagement member, wherein

the first engagement member is provided with a transmission body connecting portion to be connected to a power transmission body moved in the direction in which the car door opens and closes by a drive motor for opening and closing the car door, and

the interlocking link mechanisms displace the first engagement member in parallel to the direction in which the car door opens and closes by movement of the power transmission body.

2. A door engaging device for an elevator according to claim 1, wherein each of the interlocking link mechanisms includes:

a floating support arm including a first engagement member connecting portion turnably connected to the first engagement member; and

a turning support arm including a floating support arm connecting portion turnably connected to the floating support arm and a second engagement member connecting portion turnably connected to the second engagement member, the turning support arm being supported on the car door to be turnable on a portion between the floating support arm connecting portion and the second engagement member connecting portion.

3. A door engaging device for an elevator according to claim 2, wherein a center of a turn of the turning support arm and the first engagement member connecting portion are located at positions being equal in a vertical direction, and
the center of rotation of the turning support arm, the floating support arm connecting portion, and the first engagement member connecting portion form an isosceles triangle having the floating support arm connecting portion as an apex.

4. A door engaging device for an elevator according to claim 2, further comprising a guide mechanism for limiting the movement of the first engagement member to a horizontal direction.

5. A door engaging device for an elevator according to claim 1, wherein each of the interlocking link mechanisms includes:

a first floating support arm including a first engagement member connecting portion turnably connected to the first engagement member;

a second floating support arm including a second engagement member connecting portion turnably connected to the second engagement member; and

a turning support arm including a first floating support arm connecting portion turnably connected to the first floating support arm and a second floating support arm connecting portion turnably connected to the second floating support arm, the turning support arms being supported on the car door to be turnable on a portion between the first floating support arm connecting portion and the second floating support arm connecting portion.

6. A door engaging device for an elevator according to claim 5, wherein a center of rotation of the turning support arm, the first engagement member connecting portion and the second engagement member connecting portion are located at positions being equal in a vertical direction,
the center of rotation of the turning support arm, the first floating support arm connecting portion, and the first engagement member connecting portion form an isosceles triangle having the first floating support arm connecting portion as an apex; and
the center of rotation of the turning support arm, the second floating support arm connecting portion, and the second engagement member connecting portion form an isosceles triangle having the second floating support arm connecting portion as an apex.

7. A door engaging device for an elevator according to claim 5, further comprising a guide mechanism for limiting the movement of the first engagement member and the second engagement member to a horizontal direction.

8. A door engaging device for an elevator according to claim 1, wherein each of the interlocking link mechanisms includes:

a pair of first floating support arms, each including a first engagement member connecting portion turnably connected to the first engagement member, the first floating support arms being connected to the first engagement member at the same position;

a pair of second floating support arms, each including a second engagement member connecting portion turnably connected to the second engagement member, the second floating support arms being connected to the second engagement member at the same position; and

a pair of turning support arms, each including a first floating support arm connecting portion turnably connected to the first floating support arm and a second floating support arm connecting portion turnably connected to the second floating support arm, the turning support arms being supported on the car door to be turnable on a portion between the first floating support arm connecting portion and the second floating support arm connecting portion, and the turning support arms crossing each other.

Drawing