Car door device of elevator

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 has a restriction device main part 51, a bracket 52, and a contact shoe 53. The restriction device main part 51 is attached to a car door girder 31 through the bracket 52. The contact shoe 53 is attached to an upper portion of a drive belt 47. 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 are restricted by the contact shoe 53 contacting with a movable part 51a located at a restriction position.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to an elevator car door device.

Background Art

[0002] In a conventional elevator door device, a part made of a ferromagnetic material is provided on a hanger roller. A part of the door rail is made of 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 made of a ferromagnetic material, and when applying it to an existing door device, it is necessary to replace the hanger roller. In addition, 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 that can easily have 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 on the car, a door motor provided on the car, a car door provided on the car and opened and closed by the door motor, a drive belt provided on the car door rail and connected to the car door for transmitting the driving force of the door motor, and 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. The regulating device has a regulating device main body provided on the car door rail and a contact provided on the drive belt and hitting the regulating device main body during the opening and closing operation of the car door. The regulating device main body and the contact are arranged within a range where the car entrance is extended directly above when the car is viewed from the front. The regulating device main body has a movable part displaceable between a regulating position and an allowing position, and a return spring part for returning the movable part from the allowing 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 hitting the movable part located at the regulating position, and during the opening and closing operation of the car door by the door motor, the movable part is pushed by the contact, causing the return spring part to elastically deform and the movable part to displace to the allowing position.

Effect of the Invention

[0007] According to the car door device of the elevator of the present disclosure, a function of regulating the closing operation of the car door by the self-closing force of the landing door can be easily provided.

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

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Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

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Figure 21

Figure 22

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. Figure 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 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 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 guides the up and down movement of the car 8. The pair of counterweight guide rails guides the up and down movement of the counterweight 9.

[0014] The car 8 has a car frame 10, a car cabin 11, and a car door device 12. The suspension body 7 is connected to the car frame 10. The car cabin 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] A landing door device 14 is provided at each of the landings on multiple floors. Each landing door device 14 operates in conjunction with the car door device 12 to open and close when the car 8 lands.

[0016] Figure 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 sill 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] A landing entrance 14a is provided at each landing on multiple floors. The landing door sill 15 is fixed above the landing entrance 14a. A landing door rail 15a is provided on the landing door sill 15. The landing door rail 15a is arranged parallel and horizontally in the width direction of the landing entrance 14a. The width direction of the landing entrance 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 14a is opened and closed, 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 14a.

[0020] The landing door hanger 21 is fixed to the upper part of the landing door body 20. Also, 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 sill 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 sill 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] Also, the interlock device 19 has a latch 27, an interlock latch 28, a fixed-side interlock roller 29, and a movable-side interlock roller 30.

[0027] The latch 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 is hooked on the latch 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 forces of the first landing door 16 and the second landing door 17 by using, for example, the gravity acting on the closer weight.

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

[0031] The car compartment 11 is provided with a car entrance 11a. The car door girder 31 is fixed to the car 8 above the car entrance 11a. The car door girder 31 is provided with a car door rail 31a. The car door rail 31a is parallel to the width direction of the car entrance 11a and is horizontal. The width direction of the car entrance 11a is a direction parallel to the opening and closing operation directions 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. 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 when the car entrance 11a is opened and closed.

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

[0034] The car door hanger 42 is fixed to the upper part of the car door body 41. Further, 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 cage door body 41. Each hanger roller 42b is rotatably provided on the hanger plate 42a. Further, each hanger roller 42b is placed on the cage door rail 31a. Further, each hanger roller 42b moves while rolling on the cage door rail 31a during the opening and closing operations of the first cage door 32 and the second cage door 33.

[0037] Each upthrust roller 42c is provided on the hanger plate 42a directly below the corresponding hanger roller 42b. Further, each upthrust roller 42c is disposed under the cage door rail 31a. Further, each upthrust roller 42c prevents the corresponding hanger roller 42b from falling off the cage door rail 31a.

[0038] The cage door drive mechanism 34 is provided on the cage door sill 31. Further, the cage door drive mechanism 34 has a door motor 44, a first cage pulley 45, a second cage pulley 46, an endless drive belt 47, a first cage door connection fitting 48, and a second cage door connection fitting 49.

[0039] The door motor 44 is fixed to the cage door sill 31. The first cage pulley 45 is attached to the rotating shaft of the door motor 44. The door motor 44 rotates the first cage pulley 45.

[0040] The second cage pulley 46 is provided on the cage door sill 31 at an interval in the width direction of the cage entrance 11a with respect to the first cage pulley 45. The drive belt 47 is wound around the first cage pulley 45 and the second cage pulley 46.

[0041] The first cage door 32 is connected to the lower part of the drive belt 47 via the first cage door connection fitting 48. The second cage door 33 is connected to the upper part of the drive belt 47 via the second cage door connection fitting 49.

[0042] 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. That is, the drive belt 47 transmits the driving force of the door motor 44 to the first car door 32 and the second car door 33.

[0043] The car-side connection mechanism is provided between the first car door 32 and the car door rail 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. As a result, the interlock latch 28 rotates clockwise in FIG. 2, and the interlock device 19 is unlocked.

[0044] The regulating device 50 regulates 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 while allowing the opening and closing operations of the first car door 32 and the second car door 33 by the door motor 44. Further, the regulating device 50 includes a regulating device main body 51, a bracket 52, and a contact 53.

[0045] The regulating device main body 51 is attached to the car door rail 31 via the bracket 52. Further, the regulating device main body 51 is disposed directly above the upper portion of the drive belt 47.

[0046] The contact 53 is attached to the upper portion of the drive belt 47. The outer shape of the contact 53 is spherical.

[0047] Further, the contact 53 hits the regulating device main body 51 during the opening and closing operations of the first car door 32 and the second car door 33. Specifically, the contact 53 hits the movable part 51a immediately before the first car door 32 and the second car door 33 reach the fully open position during the opening operations of the first car door 32 and the second car door 33.

[0048] The regulating device main body 51, the bracket 52, and the contact 53 are arranged within a range where, when looking at the car 8 from the front, the car entrance 11a is extended directly upward. The width dimension of the car entrance 11a is equivalent to the width dimension of the landing entrance 14a.

[0049] FIG. 4 is a front view showing an enlarged main part of the car door device 12 in FIG. 3. FIG. 5 is a front view showing a state during the movement of the first car door 32 in FIG. 4 to the fully open position. FIG. 6 is a front view showing a state immediately before the first car door 32 in FIG. 4 reaches the fully open position. FIG. 7 is a front view showing a state where the first car door 32 in FIG. 4 has reached the fully open position.

[0050] The regulating device main body 51 is a leaf spring member formed by bending a strip-shaped spring steel. Further, the regulating device main body 51 has a V-shaped movable part 51a and a return spring part 51b.

[0051] The movable part 51a is displaceable in the vertical direction between the regulating position shown in FIGS. 4, 5, and 7 and the allowable position shown in FIG. 6.

[0052] The regulating position is a position below the upper end of the contact 53 in the vertical direction. That is, when the movable part 51a is in the regulating position, the distance between the lower end of the movable part 51a and the upper surface of the drive belt 47 is shorter than the distance between the upper end of the contact 53 and the upper surface of the drive belt 47. The allowable position is a position above the regulating position.

[0053] The upper end of the bracket 52 is fixed to the car door rail 31. The end of the return spring part 51b on the side opposite to the movable part 51a is fixed to the lower end of the bracket 52. The return spring part 51b returns the movable part 51a from the allowable position to the regulating position.

[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 regulated by the contact 53 hitting the movable part 51a located in the regulating position, as shown in FIG. 7.

[0055] When the first car door 32 and the second car door 33 are opened and closed by the door motor 44, the movable part 51a is pushed by the contact 53, so that the return spring part 51b is elastically deformed and the movable part 51a is displaced to the allowable position. As a result, the contact 53 is allowed to pass through the movable part 51a, and the opening and closing operations of the first car door 32 and the second car door 33 are allowed.

[0056] The opening and closing force by the door motor 44 is larger than the self-closing force of the first landing door 16 and the second landing door 17. The spring force of the return spring part 51b 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 51b 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.

[0057] FIG. 8 is a front view showing an enlarged view of the contact 53 in FIG. 3. FIG. 9 is a plan view showing the contact 53 in FIG. 8. FIG. 10 is a perspective view showing the contact 53 in FIG. 8. The contact 53 has a first member 54, a second member 55, and a pair of screws 56. In FIGS. 9 and 10, the pair of screws 56 are omitted.

[0058] The first member 54 has a first member body 54a and a plurality of protrusions 54b. The outer shape of the first member body 54a is a hemispherical shape with a flat lower surface. That is, the contact surface of the contact 53 with the regulating device body 51 is hemispherical. The first member body 54a is provided with a pair of through holes 54c and a pair of first counterbores 54d.

[0059] The plurality of protrusions 54b each project downward from the lower surface of the first member body 54a, that is, toward the second member 55 side. Also, the plurality of protrusions 54b are arranged at intervals in the longitudinal direction of the drive belt 47.

[0060] The upper end of each through hole 54c opens into the first counterbore 54d. The lower end of each through hole 54c opens on the lower surface of the first member body 54a.

[0061] The outer shape of the second member 55 is a hemispherical shape with a flat upper surface. The contact 53 is attached to the drive belt 47 by sandwiching the drive belt 47 between the first member 54 and the second member 55. The second member 55 is provided with a pair of screw holes 55a and a pair of second counterbore portions 55b.

[0062] The upper end of each screw hole 55a opens on the upper surface of the second member 55. The lower end of each screw hole 55a opens into the second counterbore portion 55b.

[0063] The first member 54 and the second member 55 are coupled to each other by a pair of screws 56. Each screw 56 is passed through the through hole 54c and screwed into the screw hole 55a. In a state where the contact 53 is attached to the drive belt 47, a pair of screws 56 are positioned on both sides of the drive belt 47 when viewed from directly above.

[0064] In such an elevator car door device 12, the regulating device 50 is arranged within a range where, when the car 8 is viewed from the front, the car entrance 11a is extended directly above. For this reason, the regulating device 50 can be attached to the car 8 during work from the landing, and 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.

[0065] 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.

[0066] Also, maintenance work on the regulating device 50 can be easily performed from the landing.

[0067] In addition, the contact surface of the contact 53 with the restriction device main body 51 is hemispherical. Therefore, the contact resistance between the contact 53 and the restriction device main body 51 can be reduced, and an increase in the running resistance of the first cage door 32 and the second cage door 33 can be suppressed. Also, wear of the contact 53 and the restriction device main body 51 can be suppressed.

[0068] In addition, the contact 53 is attached to the drive belt 47 by sandwiching the drive belt 47. Therefore, instead of a belt manufactured in an annular shape, both ends of a belt having both ends are sandwiched by the contact 53 and can be used as the annular drive belt 47. Thereby, the length adjustment of the drive belt 47 can be facilitated.

[0069] In addition, the restriction device main body 51 is a leaf spring member. Therefore, the closing operation of the first cage door 32 and the second cage door 33 can be restricted with a simple configuration, and cost reduction can be achieved.

[0070] Also, the spring force of the return spring portion 51b 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 and closing forces by the door motor 44. Therefore, the normal opening and closing operation by the door motor 44 can be made smooth, and the generation of noise during the normal opening and closing operation can be suppressed.

[0071] Embodiment 2. Next, FIG. 11 is a front view showing the restriction device 50 according to Embodiment 2. In FIG. 11, the states of the contact 53 and the movable portion 51a when the first cage door 32 and the second cage door 33 are in the fully open position are shown by solid lines. Also, the state in which the movable portion 51a is displaced to the allowable position by the contact 53 is shown by a two-dot chain line.

[0072] The restriction device 50 according to Embodiment 2 has a guide member 57 in addition to the restriction device main body 51, the bracket 52, and the contact 53.

[0073] The guide member 57 is provided on the car door rail 31 at the position where the contact 53 hits the movable part 51a. The guide member 57 is fixed to the car door rail 31 by a plurality of bolts 58.

[0074] A guide surface 57a is provided at the upper end of the guide member 57. The guide surface 57a faces the regulating device main body 51. The drive belt 47 is disposed between the regulating device main body 51 and the guide surface 57a.

[0075] Also, the guide surface 57a is inclined so as to gradually approach the drive belt 47 in the moving direction of the contact 53 during the opening operation of the first car door 32 and the second car door 33, that is, in the right direction in FIG. 11.

[0076] The contact 53 also hits the guide surface 57a when hitting the movable part 51a. The guide member 57 guides the movement of the contact 53, thereby suppressing the downward deflection of the contact 53 when it hits the movable part 51a.

[0077] Other configurations and operations in the second embodiment are the same as those in the first embodiment.

[0078] In such a car door device 12, when the contact 53 hits the movable part 51a, it is guided by the guide member 57, and the deflection of the drive belt 47 is suppressed. Therefore, 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 can be more reliably regulated.

[0079] Embodiment 3. Next, FIG. 12 is a front view showing a main part of the car door device 12 according to the third embodiment. In FIG. 12, a state where the first car door 32 has moved to the fully open position is shown. The regulating device 60 of the third embodiment has a regulating device main body 61 and a contact 53 similar to that in the first embodiment.

[0080] The regulating device main body 61 is fixed to the car door sill 31 at a position where the contact 53 reaches immediately before the first car door 32 and the second car door 33 reach the fully open position.

[0081] FIG. 13 is a front view showing the regulating device main body 61 of FIG. 12. FIG. 14 is a side view showing the regulating device main body 61 of FIG. 13. The regulating device main body 61 is a leaf spring member formed by bending a strip of spring steel. The outer shape of the regulating device main body 61 is U-shaped.

[0082] The regulating device main body 61 has a flat fixing portion 61a, a flat first arm portion 61b, and a flat second arm portion 61c. The fixing portion 61a is fixed to the car door sill 31.

[0083] The first arm portion 61b protrudes upward from the upper end of the fixing portion 61a above the drive belt 47 at a right angle to the fixing portion 61a. The second arm portion 61c protrudes downward from the lower end of the fixing portion 61a below the drive belt 47 at a right angle to the fixing portion 61a. The drive belt 47 passes between the first arm portion 61b and the second arm portion 61c.

[0084] Each of the first arm portion 61b and the second arm portion 61c has a movable portion 61d and a return spring portion 61e. The contact 53 hits the upper and lower movable portions 51a immediately before the first car door 32 and the second car door 33 reach the fully open position.

[0085] Each movable portion 61d is displaceable in the vertical direction between a regulated position shown by a solid line in FIG. 14 and a permitted position shown by a two-dot chain line in FIG. 14. When the upper and lower movable portions 61d are in the regulated positions respectively, the interval between the upper and lower movable portions 61d is smaller than the vertical dimension of the contact 53.

[0086] The permitted position is a position where the upper and lower movable portions 61d are separated from each other by the contact 53. Each return spring portion 61e returns the movable portion 61d from the permitted position to the regulated position.

[0087] The closing operations 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 are regulated by the contact 53 hitting the upper and lower movable parts 61d located at the regulation positions, as shown in FIG. 12.

[0088] When the first car door 32 and the second car door 33 are opened and closed by the door motor 44, the upper and lower movable parts 61d are pushed by the contact 53, so that the upper and lower return spring parts 61e are elastically deformed and the movable parts 61d are displaced to the allowable positions. Thereby, the contact 53 is allowed to pass through the movable part 61d, and the opening and closing operations of the first car door 32 and the second car door 33 are allowed.

[0089] The spring force of the upper and lower return spring parts 61e is set to a value that is 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 upper and lower return spring parts 61e 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.

[0090] Other configurations and operations in Embodiment 3 are the same as those in Embodiment 1.

[0091] Even when such a regulation device main body 61 is used, the same effects as those in Embodiment 1 can be obtained.

[0092] Also, since the contact 53 passes between the upper and lower movable parts 61d, the deflection of the drive belt 47 when the contact 53 hits the regulation device main body 61 is suppressed without separately using the guide member 57 as shown in Embodiment 2. For this reason, the closing operations 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 can be regulated more reliably.

[0093] In addition, in Embodiments 1 to 3, the spherical contact 53 is shown, but the shape of the contact 53 is not limited to spherical.

[0094] FIG. 15 is a front view showing a modified example of the contact in Embodiments 1 to 3. FIG. 16 is a plan view showing the contact in FIG. 15.

[0095] The contact 62 of this modified example has an upper plate 63, a lower plate 64, and a plurality of screws 65. The upper plate 63 and the lower plate 64 are coupled to each other by the plurality of screws 65.

[0096] The middle portion of the upper plate 63 in the longitudinal direction of the drive belt 47 is bent into a triangular shape that protrudes upward. The middle portion of the lower plate 64 in the longitudinal direction of the drive belt 47 is bent into a triangular shape that protrudes downward.

[0097] The contact 62 is attached to the drive belt 47 by sandwiching the drive belt 47 between the upper plate 63 and the lower plate 64.

[0098] Embodiment 4. Next, FIG. 17 is a front view showing a main part of the cage door device 12 according to Embodiment 4. The regulating device 70 of Embodiment 4 has a regulating device main body 51 and a contact 71.

[0099] The configuration of the regulating device main body 51 is the same as that in Embodiment 1. However, in Embodiment 4, the regulating device main body 51 is directly fixed to the cage door girder 31 obliquely above the drive belt 47, not above the drive belt 47.

[0100] Also, the movable part 61d is displaceable in the horizontal direction, that is, in the width direction of the drive belt 47, between the regulation position and the allowable position, instead of in the vertical direction.

[0101] FIG. 18 is an enlarged front view showing the regulating device 70 in FIG. 17. FIG. 19 is a plan view showing the regulating device 70 in FIG. 18. The contact 71 has a mounting portion 72, a shaft 73, and a roller 74.

[0102] The attachment portion 72 has an upper plate 75, a lower plate 76, and a plurality of screws 77. The upper plate 75 and the lower plate 76 are coupled to each other by the plurality of screws 77. The attachment portion 72 is attached to the drive belt 47 by sandwiching the drive belt 47 between the upper plate 75 and the lower plate 76.

[0103] The shaft 73 protrudes vertically upward from the attachment portion 72. The roller 74 is attached to the shaft 73. Further, the roller 74 is rotatable about the shaft 73.

[0104] Also, the roller 74 contacts the regulation device main body 51 during the opening and closing operations of the first car door 32 and the second car door 33. Specifically, during the opening operation of the first car door 32 and the second car door 33, immediately before the first car door 32 reaches the fully open position, the outer peripheral surface of the roller 74 contacts the movable portion 51a.

[0105] The closing operations 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 are regulated by the roller 74 contacting the movable portion 51a located at the regulation position, as shown in FIG. 19. The closing operations 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 are regulated by the roller 74 contacting the movable portion 51a located at the regulation position, as shown in FIG. 19.

[0106] During the opening and closing operations of the first car door 32 and the second car door 33 by the door motor 44, the return spring portion 51b is elastically deformed and the movable portion 51a is displaced to the allowable position when the movable portion 51a is pushed by the roller 74. As a result, the contact 71 is allowed to pass through the movable portion 51a, and the opening and closing operations of the first car door 32 and the second car door 33 are allowed.

[0107] Other configurations and operations in the fourth embodiment are the same as those in the first embodiment.

[0108] Even when such a contact 71 is used, the same effects as those in the first embodiment can be obtained.

[0109] Further, when the contact 71 hits the movable part 51a, the contact 71 receives a force in the width direction of the drive belt 47. Therefore, compared with the case of receiving a force in the vertical direction, that is, the thickness direction of the drive belt 47, the deflection of the drive belt 47 is suppressed. For this reason, 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 can be more reliably restricted.

[0110] In addition, in the fourth embodiment, the shaft 73 protrudes upward from the mounting portion 72, but the shaft 73 may protrude downward from the mounting portion 72. In this case, the regulating device main body 51 is fixed to the car door sill 31 below the mounting portion 72.

[0111] Also, in the fourth embodiment, the shaft 73 and the roller 74 may be provided above and below the mounting portion 72. In this case, two regulating device main bodies 51 are fixed to the car door sill 31.

[0112] Embodiment 5. Next, FIG. 20 is a front view showing a main part of the car door device 12 according to the fifth embodiment. The regulating device 80 of the fifth embodiment has a regulating device main body 81 and a contact 53 similar to that of the second embodiment. That is, in the fifth embodiment, the regulating device main body 81 is used instead of the regulating device main body 51 in the second embodiment. The regulating device main body 81 is fixed to the car door sill 31.

[0113] FIG. 21 is a front view showing the regulating device main body 81 of FIG. 20. The regulating device main body 81 has a holder 82, a compression spring 83 as a return spring portion, and a movable member 84 as a movable part.

[0114] The holder 82 is fixed to the car door sill 31. The holder 82 is provided with a housing hole 82a. The compression spring 83 is housed in the housing hole 82a. That is, the compression spring 83 is provided inside the holder 82. The upper end of the compression spring 83 is fixed to the bottom surface of the housing hole 82a.

[0115] The movable member 84 is fixed to the lower end of the compression spring 83. A ball is used as the movable member 84. That is, the restricting device main body 81 in the fifth embodiment is a ball plunger.

[0116] Further, the movable member 84 is displaceable in the vertical direction with respect to the holder 82 between a restricting position shown in FIG. 21 and an allowable position shown in FIG. 22. The restricting position is a position where the movable member 84 protrudes downward from the lower end of the holder 82.

[0117] 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 are restricted when the contact 53 hits the movable member 84 located at the restricting position.

[0118] The allowable position is a position where the movable member 84 is retracted into the holder 82. The compression spring 83 returns the movable member 84 from the allowable position to the restricting position.

[0119] When the first car door 32 and the second car door 33 are opened and closed by the door motor 44, the compression spring 83 is elastically deformed and the movable member 84 is displaced to the allowable position as the movable member 84 is pushed by the contact 53. Thereby, it is allowed for the contact 53 to pass through the movable member 84, and the opening and closing operations of the first car door 32 and the second car door 33 are allowed.

[0120] The spring force of the compression spring 83 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. Further, the spring force of the compression spring 83 is set to a value closer to the self-closing force than an 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.

[0121] Other configurations and operations in the fifth embodiment are the same as those in the second embodiment.

[0122] Even with such a restricting device 80, the same effects as those in the second embodiment can be obtained.

[0123] Also, the compression spring 83 is housed within the holder 82. Further, the movable member 84 is fixed to the compression spring 83. Therefore, the expansion and contraction of the compression spring 83 is guided by the holder 82, and the movable member 84 can be properly displaced between the regulated position and the permitted position.

[0124] Also, the movable member 84 is a ball. Therefore, a commercially available ball plunger can be used as the restricting device main body 81, and cost reduction can be achieved.

[0125] Note that instead of the restricting device main body 51 in Embodiments 1 and 4, the restricting device main body 81 of Embodiment 5 may be used.

[0126] Also, in Embodiments 1 to 5, the positions of the first car door 32 and the second car door 33 whose closing operations are restricted by the restricting devices 50, 60, 70, 80 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, i.e., the door closing side, than the fully open position.

[0127] Also, in Embodiments 1 to 5, the contacts 53, 62, 71 may be attached to the lower portion of the drive belt 47.

[0128] Also, the restricting devices 50, 60, 70, 80 in Embodiments 1 to 5 can be installed not only in newly installed elevators but also in existing elevators.

[0129] Also, in Embodiments 1 to 5, the number of car doors is not limited to two, and may be one or three or more.

[0130] Also, in Embodiments 1 to 5, the center-opening type car door device 12 is shown, but the restricting devices 50, 60, 70, 80 can also be applied to the single-opening type car door device 12.

[0131] Also, the layout of the entire elevator is not limited to the layout of FIG. 1. For example, the roping method may be the 2:1 roping method.

[0132] Further, the elevator may be a machine roomless elevator, a double-deck elevator, a one-shaft multi-car elevator, or the like. The one-shaft multi-car system is a system in which an upper car and a lower car arranged directly below the upper car move up and down in a common hoistway independently of each other.

[0133] Although the preferred embodiments and the like have been described in detail above, the present invention is not limited to the above-described embodiments and the like, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope described in the claims.

[0134] Hereinafter, aspects of the present disclosure will be summarized and described as appendices.

[0135] (Appendix 1) A car door rail provided in the car, A door motor provided on the car door rail, A car door provided in the car and opened and closed by the door motor, A drive belt provided on the car door rail and connected to the car door, for transmitting the driving force of the door motor to the car door, and 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 Comprising, The regulating device is, A regulating device main body provided on the car door rail, and A contact provided on the drive belt and hitting the regulating device main body when the car door opens and closes Having, The regulating device main body and the contact are arranged within a range where the car entrance is extended directly above when the car is viewed from the front. The regulating device main body is, A movable part displaceable between a regulating position and an allowable position, and A return spring part for returning the movable part from the allowable position to the regulating position has, the closing operation of the car door by the self-closing force of the landing door is restricted by the contact hitting the movable part located at the restricted position, When the car door is opened and closed by the door motor, the movable part is pushed by the contact, so that the return spring part is elastically deformed and the movable part is displaced to the allowable position, an elevator car door device. (Appendix 2) The contact surface of the contact with the regulating device body is hemispherical, the elevator car door device according to Appendix 1. (Appendix 3) The contact is attached to the drive belt by sandwiching the drive belt, the elevator car door device according to Appendix 1 or Appendix 2. (Appendix 4) The regulating device body is a leaf spring member, the elevator car door device according to any one of Appendices 1 to 3. (Appendix 5) A guide member is provided on the car door sill at the position where the contact hits the movable part, and by guiding the movement of the contact, the drive belt is prevented from being deflected. The elevator car door device according to any one of Appendices 1 to 4, further comprising. (Appendix 6) The regulating device body has a first arm portion and a second arm portion, The drive belt passes between the first arm portion and the second arm portion, Each of the first arm portion and the second arm portion has the movable part and the return spring part, the elevator car door device according to Appendix 4. (Appendix 7) The contact, a mounting portion attached to the drive belt, a shaft protruding from the mounting portion to at least one of the upper and lower sides of the drive belt, and a roller provided on the shaft and hitting the movable part. has, The movable part is displaceable in the width direction of the drive belt between the restricted position and the allowable position, and is the car door device of the elevator according to any one of Appendices 1 to 4.

Explanation of Signs

[0136] 8 car, 11a car entrance, 12 car door device, 16 first landing door, 17 second landing door, 31 car door sill, 32 first car door, 33 second car door, 44 door motor, 47 drive belt, 50, 60, 70, 80 regulating device, 51, 61, 81 regulating device main body, 51a, 61d movable part, 51b, 61e return spring part, 53, 62, 71 contact, 57 guide member, 72 mounting part, 73 shaft, 74 roller, 83 compression spring (return spring part), 84 movable member (movable part).

Claims

1. A car door rail provided in the car, A door motor provided in the car, A car door provided in the car and opened and closed by the door motor, A drive belt provided on the car door rail and connected to the car door for transmitting the driving force of the door motor to the car door, and 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 Comprising, The regulating device is, A regulating device main body provided on the car door rail, and A contact provided on the drive belt and hitting the regulating device main body when the car door opens and closes Having, The regulating device main body and the contact are arranged within a range where the car entrance is extended directly above when the car is viewed from the front, The regulating device main body is, A movable part displaceable between a regulating position and an allowing position, and A return spring part for returning the movable part from the allowing 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 the contact hitting the movable part located at the regulating position, An elevator car door device in which, when the car door is opened and closed by the door motor, the contact pushes the movable part, causing the return spring part to elastically deform and the movable part to displace to the allowing position.

2. The elevator car door device according to claim 1, wherein the contact surface of the contact with the regulating device main body is hemispherical.

3. The elevator car door device according to claim 1 or claim 2, wherein the contact is attached to the drive belt by sandwiching the drive belt.

4. The elevator car door device according to claim 1 or claim 2, wherein the regulating device main body is a leaf spring member.

5. A guide member provided on the car door rail at a position where the contact hits the movable part, and by guiding the movement of the contact, suppressing the bending of the drive belt Further comprising the elevator car door device according to claim 1 or claim 2.

6. The regulating device main body has a first arm part and a second arm part, The drive belt passes between the first arm part and the second arm part, The elevator car door device according to claim 4, wherein each of the first arm part and the second arm part has the movable part and the return spring part.

7. The contactor is a mounting portion attached to the drive belt, a shaft protruding from the mounting portion to at least one of the upper and lower sides of the drive belt, and a roller provided on the shaft and contacting the movable portion. It has The movable portion is displaceable in the width direction of the drive belt between the restricted position and the allowable position. The car door device of the elevator according to claim 1 or claim 2.

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