Car door device of elevator and repair method of the same

Abstract

To obtain a car door device of an elevator which can easily attain a function for restricting closing operations of car doors by self-closing force of landing doors.SOLUTION: A restriction device 50 is provided at a car door rail 31a. Further, the restriction device 50 restricts closing operations of a first car door 32 and a second car door 33 by self-closing force of a first landing door 16 and a second landing door 17 while allowing opening / closing operations of a first landing door 32 and a second landing door 33 by a door motor 44.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to an elevator car door device and a method for modifying the same.

Background Art

[0002] In a conventional elevator door device, a part constituted by a ferromagnetic material is provided on a hanger roller. A part of the door rail is constituted by a magnet. The magnet is arranged at a position corresponding to the ferromagnetic material when the door is at least in the closed position among the open position and the closed position (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional elevator door device as described above, it is necessary to use a special hanger roller including a part constituted by a ferromagnetic material, and when applying it to an existing door device, it is necessary to replace the hanger roller. Further, it is necessary to arrange a magnet at a position corresponding to the ferromagnetic material when the door is at least in the closed position among the open position and the closed position, and the position adjustment is troublesome.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to obtain an elevator car door device and a method for modifying the same that can easily provide a function of restricting the closing operation of the car door by the self-closing force of the landing door.

Means for Solving the Problems

[0006] The car door device of the elevator according to the present disclosure includes a car door rail provided in the car, a door motor provided in the car, a car door body, and a car door hanger provided at the upper part of the car door body and hung on the car door rail. It has a car door that opens and closes along the car door rail by a door motor, and a regulating device provided on the car door rail that regulates the closing operation of the car door by the self-closing force of the landing door while allowing the opening and closing operation of the car door by the door motor. The regulating device has a movable part that can be displaced between a regulating position that is a position protruding from the car door rail and a permitted position that is retracted toward the car door rail side from the regulating position, and a return spring part that returns the movable part from the permitted position to the regulating position. The closing operation of the car door by the self-closing force of the landing door is regulated by the contact part, which is a part of the car door hanger, hitting the movable part located at the regulating position. When the car door is opened and closed by the door motor, the movable part is pushed by the contact part, causing the return spring part to elastically deform and the movable part to be displaced to the permitted position. The method for modifying the car door device of the elevator according to the present disclosure includes an installation step of installing a regulating device that regulates the closing operation of the car door by the self-closing force of the landing door while allowing the opening and closing operation of the car door by the door motor in the car. In the installation step, the regulating device is installed at a position where the existing parts provided on the car door come into contact during the opening and closing operation of the car door by the door motor. The regulating device has a movable part that can be displaced between a regulating position that regulates the closing operation of the car door by the self-closing force of the landing door and a permitted position that allows the passage of the existing parts, and a return spring part that returns the movable part from the permitted position to the regulating position. The closing operation of the car door by the self-closing force of the landing door is regulated by the existing parts hitting the movable part located at the regulating position. When the car door is opened and closed by the door motor, the movable part is pushed by the existing parts, causing the return spring part to elastically deform and the movable part to be displaced to the permitted position.

Advantages of the Invention

[0007] According to the present disclosure, it is possible to easily provide a function of regulating the closing operation of the car door by the self-closing force of the landing door.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Embodiment for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. FIG. 1 is a schematic configuration diagram showing an elevator according to Embodiment 1. In the figure, a machine room 2 is provided above the hoistway 1. In the machine room 2, a hoisting machine 3, a compensator car 4, and an elevator control device 5 are installed.

[0010] The hoisting machine 3 has a drive sheave 6, a hoisting machine motor (not shown), and a hoisting machine brake (not shown). The hoisting machine motor rotates the drive sheave 6. The hoisting machine brake holds the drive sheave 6 in a stationary state. Further, the hoisting machine brake brakes the rotation of the drive sheave 6.

[0011] A suspension body 7 is wound around the drive sheave 6 and the compensator car 4. As the suspension body 7, a plurality of ropes or a plurality of belts are used. A car 8 is connected to the first end of the suspension body 7. A counterweight 9 is connected to the second end of the suspension body 7.

[0012] The car 8 and the counterweight 9 are suspended by the suspension body 7 and move up and down in the hoistway 1 by rotating the drive sheave 6. The elevator control device 5 controls the operation of the car 8 by controlling the hoisting machine 3.

[0013] In the hoistway 1, a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed. The pair of car guide rails guide the up and down movement of the car 8. The pair of counterweight guide rails guide the up and down movement of the counterweight 9.

[0014] The car 8 has a car frame 10, a car chamber 11, and a car door device 12. A suspension body 7 is connected to the car frame 10. The car chamber 11 is supported by the car frame 10. A door controller 13 is provided on the car 8. The door controller 13 controls the car door device 12.

[0015] At each landing of multiple floors, a landing door device 14 is provided. Each landing door device 14 opens and closes in conjunction with the car door device 12 when the car 8 lands.

[0016] FIG. 2 is a front view of the main part of the landing door device 14 in FIG. 1 as viewed from the hoistway 1 side. Each landing door device 14 has a landing door girder 15, a first landing door 16, a second landing door 17, a landing door interlocking mechanism 18, an interlock device 19, and a door closer (not shown).

[0017] At each landing of multiple floors, a landing entrance / exit 14a is provided. The landing door girder 15 is fixed to the upper part of the landing entrance / exit 14a. A landing door rail 15a is provided on the landing door girder 15. The landing door rail 15a is arranged in parallel and horizontally in the width direction of the landing entrance / exit 14a. The width direction of the landing entrance / exit 14a is a direction parallel to the opening and closing operation direction of the first landing door 16 and the second landing door 17, and is the left - right direction in FIG. 2.

[0018] The first landing door 16 and the second landing door 17 are suspended from the landing door rail 15a. Also, when the landing entrance / exit 14a opens and closes, the first landing door 16 and the second landing door 17 are guided by the landing door rail 15a and move in opposite directions to each other.

[0019] Each of the first landing door 16 and the second landing door 17 has a landing door body 20 and a landing door hanger 21. Each landing door body 20 opens and closes the landing entrance / exit 14a.

[0020] The landing door hanger 21 is fixed to the upper part of the landing door body 20. Further, the landing door hanger 21 is hung on the landing door rail 15a.

[0021] The landing door interlocking mechanism 18 has a first landing pulley 22, a second landing pulley 23, an endless interlocking rope 24, a first landing door connection fitting 25, and a second landing door connection fitting 26.

[0022] The first landing pulley 22 and the second landing pulley 23 are provided on the landing door girder 15 with a space therebetween in the width direction of the landing entrance 14a. The interlocking rope 24 is wound around the first landing pulley 22 and the second landing pulley 23.

[0023] The first landing door 16 is connected to the lower part of the interlocking rope 24 via the first landing door connection fitting 25. The second landing door 17 is connected to the upper part of the interlocking rope 24 via the second landing door connection fitting 26.

[0024] When the interlocking rope 24 circulates due to the opening and closing operation of the first landing door 16, the second landing door 17 moves in the direction opposite to that of the first landing door 16. That is, the landing door interlocking mechanism 18 interlocks the second landing door 17 with the opening and closing operation of the first landing door 16.

[0025] The interlock device 19 is provided between the landing door girder 15 and the first landing door 16. Further, the interlock device 19 prevents the landing entrance 14a from being opened from the landing side when the car 8 is not landed.

[0026] The interlock device 19 also has a latch 27, an interlock latch 28, a fixed-side interlock roller 29, and a movable-side interlock roller 30.

[0027] The catch 27 is fixed to the landing door sill 15. The interlock latch 28 is rotatably attached to the landing door hanger 21 of the first landing door 16. When the first landing door 16 and the second landing door 17 are in the fully closed position, the tip of the interlock latch 28 catches on the catch 27, thereby preventing the first landing door 16 and the second landing door 17 from moving in the opening direction.

[0028] The fixed-side interlock roller 29 is arranged coaxially with the rotation axis of the interlock latch 28. The movable-side interlock roller 30 is attached to the interlock latch 28. Thereby, the movable-side interlock roller 30 can move along an arc centered on the rotation axis of the interlock latch 28.

[0029] The door closer always applies a closing force, i.e., a self-closing force, to the first landing door 16 and the second landing door 17. The door closer generates the self-closing force of the first landing door 16 and the second landing door 17 by utilizing, for example, the gravity acting on the closer weight.

[0030] FIG. 3 is a front view of the car door device 12 in FIG. 1 as viewed from the landing side. The car door device 12 has a car door sill 31, a first car door 32, a second car door 33, a car door drive mechanism 34, a car-side connection mechanism (not shown), a car threshold 36, and a regulating device 50.

[0031] A car entrance 11a is provided in the car compartment 11. The car door sill 31 is fixed to the car 8 above the car entrance 11a. A car door rail 31a is provided on the car door sill 31. The car door rail 31a is parallel and horizontal in the width direction of the car entrance 11a. The width direction of the car entrance 11a is a direction parallel to the opening and closing operation direction of the first car door 32 and the second car door 33, and is the left-right direction in FIG. 3.

[0032] The first car door 32 and the second car door 33 are suspended from the car door rail 31a. When the car entrance 11a is opened and closed, the first car door 32 and the second car door 33 are guided by the car door rail 31a and move in opposite directions to each other.

[0033] Each of the first car door 32 and the second car door 33 has a car door body 41, a car door hanger 42, and a plurality of door legs 43. Each car door body 41 opens and closes the car entrance 11a.

[0034] The car door hanger 42 is provided at the upper part of the car door body 41. Also, the car door hanger 42 is hung on the car door rail 31a.

[0035] Also, the car door hanger 42 has a hanger plate 42a, a plurality of hanger rollers 42b, and a plurality of up-thrust rollers 42c.

[0036] The hanger plate 42a is fixed to the upper part of the car door body 41. Each hanger roller 42b is rotatably provided on the hanger plate 42a. Also, each hanger roller 42b is placed on the car door rail 31a. Also, each hanger roller 42b moves while rolling on the car door rail 31a during the opening and closing operations of the first car door 32 and the second car door 33.

[0037] Each up-thrust roller 42c is provided on the hanger plate 42a directly below the corresponding hanger roller 42b. Also, each up-thrust roller 42c is disposed below the car door rail 31a. Also, each up-thrust roller 42c prevents the corresponding hanger roller 42b from falling off the car door rail 31a.

[0038] Each door leg 43 is provided at the lower part of the car door body 41. Also, each door leg 43 protrudes downward from the lower end of the car door body 41.

[0039] The car door drive mechanism 34 is provided on the car door girder 31. The car door drive mechanism 34 has a door motor 44, a first car pulley 45, a second car pulley 46, an endless drive belt 47, a first car door connection fitting 48, and a second car door connection fitting 49.

[0040] The door motor 44 is fixed to the car door girder 31. The first car pulley 45 is attached to the rotating shaft of the door motor 44. The door motor 44 rotates the first car pulley 45.

[0041] The second car pulley 46 is provided on the car door girder 31 at an interval in the width direction of the car entrance 11a with respect to the first car pulley 45. The drive belt 47 is wound around the first car pulley 45 and the second car pulley 46.

[0042] The first car door 32 is connected to the lower part of the drive belt 47 via the first car door connection fitting 48. The second car door 33 is connected to the upper part of the drive belt 47 via the second car door connection fitting 49.

[0043] When the first car pulley 45 rotates, the drive belt 47 circulates, and the first car door 32 and the second car door 33 move in opposite directions to each other.

[0044] The car side connection mechanism is provided between the first car door 32 and the car door girder 31. When the first car door 32 is opened, the movable side interlock roller 30 and the fixed side interlock roller 29 are clamped by the car side connection mechanism. That is, the car side connection mechanism is connected to the interlock device 19. Thereby, the interlock latch 28 rotates clockwise in FIG. 2, and the interlock device 19 is unlocked.

[0045] The car sill 36 is provided at the lower part of the car entrance 11a. FIG. 3 shows a cross-section of the car sill 36. A sill groove 36a is provided in the car sill 36. The legs 43 of each door are inserted into the sill groove 36a. Thereby, the car sill 36 guides the lower end of the first car door 32 and the lower end of the second car door 33 during the opening and closing operations of the first car door 32 and the second car door 33.

[0046] The regulating device 50 is provided on the car door rail 31a. Further, while allowing the opening and closing operations of the first car door 32 and the second car door 33 by the door motor 44, the regulating device 50 restricts the closing operations of the first car door 32 and the second car door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0047] FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3. FIG. 5 is a front view showing the regulating device 50 of FIG. 4. The regulating device 50 has a holder 51, a compression spring 52 as a return spring portion, and a movable member 53 as a movable part.

[0048] The holder 51 is housed in the car door rail 31a and is fixed to the car door rail 31a. A housing hole 51a is provided in the holder 51. The housing hole 51a is provided from the upper end of the holder 51 to the vertical middle of the holder 51.

[0049] The compression spring 52 is housed in the housing hole 51a. That is, the compression spring 52 is provided inside the holder 51.

[0050] The movable member 53 is in contact with the upper end of the compression spring 52. A ball is used as the movable member 53. That is, the regulating device 50 of Embodiment 1 is a ball plunger.

[0051] FIG. 6 is a front view showing the positional relationship between the hanger roller 42b and the regulating device 50 when the first car door 32 in FIG. 3 is in the fully open position. FIG. 7 is a perspective view showing the hanger roller 42b and the regulating device 50 in FIG. 6. FIG. 8 is a front view showing the state of the regulating device 50 when the hanger roller 42b in FIG. 6 passes through the movable member 53. FIG. 9 is a side view showing the regulating device 50 in FIG. 8. FIG. 10 is a front view showing the state of the regulating device 50 when the hanger roller 42b in FIG. 6 is separated from the regulating device 50.

[0052] The movable member 53 is displaceable in the vertical direction with respect to the holder 51 between the regulating position shown in FIGS. 6, 7, and 10 and the allowable position shown in FIGS. 8 and 9.

[0053] The regulating position is a position where the movable member 53 protrudes upward from the upper surface of the car door rail 31a and restricts the closing operation of the first car door 32 and the second car door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0054] The closing operation of the first car door 32 and the second car door 33 by the self-closing force of the first landing door 16 and the second landing door 17 is restricted when a contact portion, which is a part of the car door hanger 42, hits the movable member 53 located at the regulating position. The contact portion in Embodiment 1 is the hanger roller 42b.

[0055] The allowable position is a position retracted closer to the car door rail 31a side than the regulating position. The compression spring 52 returns the movable member 53 from the allowable position to the regulating position.

[0056] When the first car door 32 and the second car door 33 are opened and closed by the door motor 44, the movable member 53 is pushed by the hanger roller 42b, causing the compression spring 52 to elastically deform and the movable member 53 to be displaced to the allowable position. Thereby, it is allowed for the hanger roller 42b to pass through the movable member 53, and the opening and closing operations of the first car door 32 and the second car door 33 are allowed.

[0057] The opening and closing force by the door motor 44 is greater than the self-closing force of the first landing door 16 and the second landing door 17. The spring force of the push spring 52 is set to a value greater than the self-closing force of the first landing door 16 and the second landing door 17 and smaller than the opening and closing force by the door motor 44. Also, the spring force of the push spring 52 is set to a value closer to the self-closing force than the intermediate value between the self-closing force of the first landing door 16 and the second landing door 17 and the opening and closing force by the door motor 44.

[0058] In such an elevator car door device 12, the regulating device 50 is provided on the car door rail 31a. Therefore, by using the hanger roller 42b which is originally a necessary part, it is possible to easily provide a function of regulating the closing operation of the first car door 32 and the second car door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0059] Thereby, for example, even when a power failure occurs after a firefighter moves from the car 8 to the landing in an emergency elevator, the closing operation of the first car door 32 and the second car door 33 by the self-closing force of the first landing door 16 and the second landing door 17 is suppressed.

[0060] Also, since the hanger roller 42b is used as the contact part, the positioning of the regulating device 50 can be facilitated. Further, when the outer peripheral surface of the hanger roller 42b is made of rubber, the noise when the hanger roller 42b collides with the regulating device 50 can be suppressed.

[0061] Also, the push spring 52 is housed in the holder 51. Also, the movable member 53 is in contact with the push spring 52. Therefore, the expansion and contraction of the push spring 52 is guided by the holder 51, and the movable member 53 can be properly displaced between the regulating position and the allowable position.

[0062] Also, the movable member 53 is a ball. Therefore, a commercially available ball plunger can be used as the regulating device 50, and cost reduction can be achieved.

[0063] Further, the spring force of the compression spring 52 is set to a value closer to the self-closing force than the intermediate value between the self-closing forces of the first landing door 16 and the second landing door 17 and the opening / closing force by the door motor 44. For this reason, the normal opening / closing operation by the door motor 44 can be made smooth, and the generation of noise during the normal opening / closing operation can be suppressed.

[0064] The modification method of the car door device 12 in the present disclosure includes an installation step of installing the regulating device 50 on the car 8. Further, in the installation step, the regulating device 50 is installed at a position where an existing component provided on the first car door 32 or the second car door 33 contacts during the opening / closing operation of the first car door 32 and the second car door 33 by the door motor 44.

[0065] The movable member 53 allows the passage of the existing component when located at the allowable position. During the opening / closing operation of the first car door 32 and the second car door 33 by the door motor 44, the movable member 53 is displaced to the allowable position by being pushed by the existing component. The existing component in the first embodiment is the hanger roller 42b.

[0066] According to such a modification method, since the hanger roller 42b, which is an existing component, is used to displace the movable member 53, the regulating device 50 can be easily attached to the existing elevator as well. That is, a car door device without the regulating device 50 can be easily modified to the car door device 12 with the regulating device 50.

[0067] Note that the shape of the movable member 53 is not limited to a spherical shape, and may be a frustum of a cone, a rectangular parallelepiped, etc. as shown in FIG. 11. By changing the shape of the movable member 53, the force resisting the self-closing force can be arbitrarily set.

[0068] Embodiment 2. Next, FIG. 12 is a front view showing the main part of the cage door device 12 according to the second embodiment. In the second embodiment, the regulating device 50 is attached to the cage door rail 31a in the upside-down direction compared to the first embodiment. For this reason, the regulating position of the movable member 53 is a position where the movable member 53 protrudes downward from the lower surface of the cage door rail 31a.

[0069] Also, the contact portion and the existing component in the second embodiment are the upthrust roller 42c. As shown in FIG. 12, when the first cage door 32 is in the fully open position, the movable member 53 is in the regulating position, and regulates the closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0070] The closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17 is regulated when the upthrust roller 42c hits the movable member 53 located in the regulating position.

[0071] When the first cage door 32 and the second cage door 33 are opened and closed by the door motor 44, the movable member 53 is pushed by the upthrust roller 42c, so that the compression spring 52 is elastically deformed and the movable member 53 is displaced to the allowable position.

[0072] Other configurations and modification methods in the second embodiment are the same as those in the first embodiment.

[0073] Even with such a configuration, by using the upthrust roller 42c which is an originally necessary component, it is possible to easily provide a function of regulating the closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0074] Also, when the outer peripheral surface of the upthrust roller 42c is made of metal, for example, iron, it is possible to suppress wear and damage of the upthrust roller 42c due to repeated collisions between the upthrust roller 42c and the regulating device 50.

[0075] Embodiment 3. Next, FIG. 13 is a front view showing a main part of the cage door device 12 according to Embodiment 3, and shows a state immediately before the first cage door 32 reaches the fully open position. FIG. 14 is a side view showing the mounting state of the restricting device 50 on the cage door rail 31a of FIG. 13.

[0076] In Embodiment 3, the restricting device 50 is horizontally attached to the cage door rail 31a. For this reason, the restricting position of the movable member 53 is a position where the movable member 53 protrudes from the side surface of the cage door rail 31a toward the landing side.

[0077] Also, the contact portion and the existing component in Embodiment 3 are the hanger plate 42a. A through hole 42d is provided in the hanger plate 42a. When the first cage door 32 is in the fully open position, the movable member 53 is inserted into the through hole 42d by being displaced to the restricting position. Thereby, the movable member 53 restricts the closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0078] The closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17 is restricted when the edge of the through hole 42d in the hanger plate 42a hits the movable member 53 located at the restricting position.

[0079] When the first cage door 32 and the second cage door 33 are opened and closed by the door motor 44, the movable member 53 is pushed by the hanger plate 42a, so that the compression spring 52 is elastically deformed and the movable member 53 is displaced to the allowable position.

[0080] Other configurations and modification methods in Embodiment 3 are the same as those in Embodiment 1.

[0081] Even with such a configuration, by using the hanger plate 42a, which is an originally necessary component, it is possible to easily provide a function of restricting the closing operation of the first car door 32 and the second car door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0082] Further, when the hanger plate 42a is made of metal, for example, iron, wear and damage of the hanger plate 42a due to repeated collisions between the hanger plate 42a and the regulating device 50 can be suppressed.

[0083] Also, by bringing the position of the through hole 42d closer to the door-opening side end of the hanger plate 42a, that is, the left end in FIG. 13, the distance at which the movable member 53 hits the hanger plate 42a can be shortened, and the generation of noise can be suppressed.

[0084] In addition, in the third embodiment, when the first car door 32 is in the fully open position, the regulating device 50 may be arranged at a position where the movable member 53 hits the door-closing side end of the hanger plate 42a, that is, the right end in FIG. 13. Thereby, it is possible to eliminate the need to provide the through hole 42d in the hanger plate 42a.

[0085] Also, the regulating device 50 in the first to third embodiments is not limited to being added to an existing elevator, and may be installed in a newly installed elevator.

[0086] Embodiment 4. Next, FIG. 15 is a front view showing a main part of the car door device 12 modified by the modification method according to the fourth embodiment. Although omitted in FIG. 3, a car-side connection mechanism 60 is provided between the first car door 32 and the car door sill 31.

[0087] When the car 8 lands on the landing and the first car door 32 starts to open, the movable-side interlock roller 30 and the fixed-side interlock roller 29 are clamped by the car-side coupling mechanism 60. That is, the car-side coupling mechanism 60 is connected to the interlock device 19. As a result, the interlock latch 28 rotates clockwise in FIG. 2, and the interlock device 19 is unlocked.

[0088] Therefore, the car-side coupling mechanism 60 can connect the first car door 32 to the first landing door 16 and interlock the first landing door 16 with the opening and closing operation of the first car door 32.

[0089] Also, the car-side coupling mechanism 60 has a cam 61 and a coupling mechanism roller 62. The existing component of Embodiment 4 is the coupling mechanism roller 62.

[0090] The cam 61 is fixed to the car door rail 31. The coupling mechanism roller 62 is provided on the first car door 32. Also, as shown in FIG. 15, the coupling mechanism roller 62 contacts the cam 61 when the first car door 32 is in the fully closed position. Also, the coupling mechanism roller 62 moves away from the cam 61 when the first car door 32 moves away from the fully closed position.

[0091] A regulating device 56 is attached to the car door rail 31 via a pedestal 55. The regulating device 56 of Embodiment 4 is a leaf spring member formed by bending a strip of spring steel.

[0092] FIG. 16 is an explanatory diagram showing the relationship between the regulating device 56 and the coupling mechanism roller 62 in FIG. 15. Also, the solid line in FIG. 16 shows the positional relationship between the regulating device 56 and the coupling mechanism roller 62 when the first car door 32 is in the fully open position.

[0093] The regulating device 56 has a V-shaped movable part 56a and a return spring part 56b. The movable part 56a is displaceable between a regulating position and an allowable position. The regulating position is the position shown by the solid line in Fig. 16. The allowable position is the position shown by the dashed-dotted line in Fig. 16. The return spring part 56b returns the movable part 56a from the allowable position to the regulating position.

[0094] In the installation process of the fourth embodiment, the regulating device 56 is installed at the position where the connecting mechanism roller 62 contacts during the opening and closing operation of the first car door 32 by the door motor 44. When the first car door 32 is in the fully open position, the movable part 56a is in the regulating position, and the closing operation of the first car door 32 and the second car door 33 due to the self-closing force of the first landing door 16 and the second landing door 17 is regulated.

[0095] The closing operation of the first car door 32 and the second car door 33 due to the self-closing force of the first landing door 16 and the second landing door 17 is regulated when the connecting mechanism roller 62 hits the movable part 56a located in the regulating position.

[0096] [[ID=ID=12]]During the opening and closing operation of the first car door 32 and the second car door 33 by the door motor 44, the movable part 56a is pushed by the connecting mechanism roller 62, so that the return spring part 56b is elastically deformed and the movable part 56a is displaced to the allowable position.

[0097] The spring force of the return spring part 56b is set to a value larger than the self-closing force of the first landing door 16 and the second landing door 17 and smaller than the opening and closing force by the door motor 44. Also, the spring force of the return spring part 56b is set to a value closer to the self-closing force than the intermediate value between the self-closing force of the first landing door 16 and the second landing door 17 and the opening and closing force by the door motor 44.

[0098] Also, in the modification method using such a regulating device 56, since the existing connecting mechanism roller 62 is utilized, the regulating device 56 can be easily attached to the existing elevator. That is, a car door device without the regulating device 56 can be easily modified to a car door device 12 with the regulating device 56.

[0099] Note that the restriction device 56 in the fourth embodiment may be replaced with the restriction device 50 similar to that in the first embodiment.

[0100] Fifth Embodiment Next, FIG. 17 is a front view showing the cage door device 12 modified by the modification method according to the fifth embodiment. In the fifth embodiment, a restriction device 50 similar to that in the fourth embodiment is fixed to the bottom surface of the threshold groove 36a in the direction opposite to the up, down, left, and right directions compared to the fourth embodiment.

[0101] The existing part in the fifth embodiment is the door leg 43. In the installation process of the fifth embodiment, the restriction device 56 is installed at the position where the door leg 43 contacts during the opening and closing operation of the first cage door 32 by the door motor 44.

[0102] FIG. 18 is a front view showing the positional relationship between the door leg 43 and the restriction device 56 immediately before the second cage door 33 in FIG. 17 moves to the fully open position. FIG. 19 is a front view showing the positional relationship between the door leg 43 and the restriction device 56 when the second cage door 33 in FIG. 17 is in the fully open position.

[0103] When the second cage door 33 is in the fully open position, the movable part 56a is in the restricted position, and restricts the closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17.

[0104] The closing operation of the first cage door 32 and the second cage door 33 by the self-closing force of the first landing door 16 and the second landing door 17 is restricted when the door leg 43 hits the movable part 56a located in the restricted position.

[0105] During the opening and closing operation of the first cage door 32 and the second cage door 33 by the door motor 44, the movable part 56a is pushed by the door leg 43, so that the return spring part 56b is elastically deformed and the movable part 56a is displaced to the allowable position.

[0106] Even with the modification method using such a regulating device 56, since the door legs 43, which are existing components, are utilized, the regulating device 56 can also be easily attached to an existing elevator. That is, a car door device without the regulating device 56 can be easily modified into a car door device 12 with the regulating device 56.

[0107] Note that the regulating device 56 in Embodiment 5 may be replaced with the same regulating device 50 as in Embodiment 1.

[0108] Also, in Embodiments 1 to 5, the existing components are not limited to the car door hanger 42, the connecting mechanism roller 62, and the door legs 43. That is, the existing components may be other components that move together with the first car door 32 or the second car door 33.

[0109] Also, in Embodiments 1 to 5, the positions of the first car door 32 and the second car door 33 whose closing operation is regulated by the regulating device 50 or the regulating device 56 are preferably the fully open positions, but are not necessarily limited to the fully open positions, and may be positions closer to the door stop side, that is, the door closing side, than the fully open positions.

[0110] Also, in Embodiments 1 to 5, the number of car doors is not limited to two, and may be one or three or more.

[0111] Also, in Embodiments 1 to 5, although the center-opening type car door device 12 is shown, the regulating device 50 or the regulating device 56 can also be applied to a single-opening type car door device 12.

[0112] Also, the layout of the entire elevator is not limited to the layout of FIG. 1. For example, the roping method may be a 2:1 roping method.

[0113] Also, the elevator may be a machine-roomless elevator, a double-deck elevator, a one-shaft multi-car type elevator, or the like. The one-shaft multi-car type is a method in which an upper car and a lower car arranged directly below the upper car each independently move up and down in a common hoistway.

Description of Symbols

[0114] 8 car, 12 car door device, 16 first landing door, 17 second landing door, 31a car door rail, 32 first car door, 33 second car door, 41 car door body, 42 car door hanger, 42a hanger plate (contact part, existing part), 42b hanger roller (contact part, existing part), 42c up thrust roller (contact part, existing part), 43 door leg (existing part), 44 door motor, 50, 56 regulating device, 51 holder, 52 pressing spring (return spring part), 53 movable member (movable part), 56a movable part, 56b return spring part, 60 car side connection mechanism, 61 cam, 62 connection mechanism roller (existing part).

Claims

1. A car door rail provided in the car, A door motor provided in the car, A car door body, and a car door hanger provided at the upper part of the car door body and hung on the car door rail, the car door being opened and closed along the car door rail by the door motor, and A regulating device provided on the car door rail, which regulates the closing operation of the car door by the self-closing force of the landing door while allowing the opening and closing operation of the car door by the door motor Comprising, The regulating device is A movable part displaceable between a regulating position which is a position protruding from the car door rail and a permitting position which is a position retracted toward the car door rail side from the regulating position, and A return spring part for returning the movable part from the permitting position to the regulating position Having, The closing operation of the car door by the self-closing force of the landing door is regulated by contact of a contact part, which is a part of the car door hanger, with the movable part located at the regulating position, During the opening and closing operation of the car door by the door motor, the movable part is pushed by the contact part, so that the return spring part is elastically deformed and the movable part is displaced to the permitting position, an elevator car door device.

2. The car door hanger is A hanger plate fixed to the upper part of the car door body, A hanger roller rotatably provided on the hanger plate and placed on the car door rail Having, The contact part is the hanger roller, the elevator car door device according to Claim 1.

3. The car door hanger is A hanger plate fixed to the upper part of the car door body, A hanger roller rotatably provided on the hanger plate and placed on the car door rail, and An up thrust roller provided on the hanger plate and located under the car door rail Having, The contact part is the up thrust roller, the elevator car door device according to Claim 1.

4. The car door hanger is A hanger plate fixed to the upper part of the car door body, A hanger roller rotatably provided on the hanger plate and placed on the car door rail Having, The contact part is the hanger plate, the elevator car door device according to Claim 1.

5. The regulating device further has a holder, The return spring part is a compression spring provided in the holder, The movable part is a movable member in contact with the compression spring. The car door device of the elevator according to any one of claims 1 to 4.

6. The movable member is a ball. The car door device of the elevator according to claim 5.

7. An installation step of installing a regulating device on a car, which regulates the closing operation of the car door by the self-closing force of the landing door while allowing the opening and closing operation of the car door by a door motor including In the installation step, the regulating device is installed at a position where an existing component provided on the car door contacts during the opening and closing operation of the car door by the door motor, The regulating device has a movable part that is displaceable between a regulating position for regulating the closing operation of the car door by the self-closing force of the landing door and a permitting position for permitting the passage of the existing component, and a return spring part for returning the movable part from the permitting position to the regulating position and The closing operation of the car door by the self-closing force of the landing door is regulated by the existing component hitting the movable part located at the regulating position, A method for modifying a car door device of an elevator, wherein during the opening and closing operation of the car door by the door motor, the existing component pushes the movable part, causing the return spring part to elastically deform and the movable part to be displaced to the permitting position.

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