Elevator door arrangement

Abstract

The elevator door assembly includes: a first pulley and a second pulley; an annular transmission body wound around the first pulley and the second pulley; a door that opens and closes by means of a driving force transmitted between the first pulley and the second pulley via the transmission body; and a connecting member that connects the first pulley and the second pulley, the connecting member having rigidity capable of transmitting the driving force between the first pulley and the second pulley.

Description

Technical Field

[0001] This disclosure relates to elevator door devices. Background Technology

[0002] Patent Document 1 describes a door safety device for an elevator. This door safety device is installed in the automatic door mechanism of an elevator. The door safety device includes a force-applying unit and a detection unit. The force-applying unit includes a spring. The detection unit supports a door drive bar via the force-applying unit and detects the relative displacement between the bar and the force-applying unit. When an abnormality occurs, such as a breakage of the bar, the door safety device stops the elevator operation based on a working signal from the detection unit.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Microfilm of Japanese Patent Application No. 61-64122 (Patent Application No. 62-176170) Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the above structure, if the strip breaks or slips, the motor's driving force is no longer transmitted to the door. Therefore, in this case, there is a problem that the door's opening and closing control cannot be performed.

[0008] This disclosure was made to solve the aforementioned problems, and its purpose is to provide an elevator door device that can control the opening and closing of the door even in the event of breakage or slippage of the transmission body.

[0009] Methods for solving problems

[0010] The elevator door device disclosed herein includes: a first pulley and a second pulley; an annular transmission body wound around the first pulley and the second pulley; a door that is opened and closed by means of a driving force transmitted between the first pulley and the second pulley via the transmission body; and a connecting member that connects the first pulley and the second pulley, the connecting member having rigidity capable of transmitting the driving force between the first pulley and the second pulley.

[0011] Invention Effects

[0012] According to this disclosure, the opening and closing of the door can be controlled even if the transmission body breaks or slips. Attached Figure Description

[0013] Figure 1 This is a diagram showing the general structure of the elevator in Embodiment 1.

[0014] Figure 2This is a front view showing the overall structure of the elevator door device according to Embodiment 1.

[0015] Figure 3 This is a diagram showing the main parts of the elevator door device according to Embodiment 1.

[0016] Figure 4 It is an enlarged representation Figure 3 A diagram of a motor pulley.

[0017] Figure 5 It is an enlarged representation Figure 3 A diagram of the drive-side car door pulley.

[0018] Figure 6 This is a diagram showing the positions of the first mounting part and the second mounting part in the elevator door device of Embodiment 1.

[0019] Figure 7 It indicates viewing from the side. Figure 3 A diagram showing the structure of the motor pulley, the drive-side car door pulley, and the connecting components.

[0020] Figure 8 This is a diagram showing the main parts of the elevator door device in Embodiment 2.

[0021] Figure 9 This is a diagram showing the main parts of the elevator door device in Embodiment 3.

[0022] Figure 10 This is a diagram showing the structure of the elevator door device in Embodiment 4. Detailed Implementation

[0023] Implementation method 1.

[0024] The elevator door device of Embodiment 1 will be described. Figure 1 This is a diagram showing the general structure of the elevator according to this embodiment. In the diagram, a machine room 2 is provided above the hoistway 1. The machine room 2 is equipped with a traction machine 3, a deflector sheave 4, and an elevator control device 5.

[0025] The traction machine 3 includes a drive sheave 6, a traction machine motor (not shown), and a traction mechanism brake (not shown). The traction machine motor rotates the drive sheave 6. The traction mechanism brake keeps the drive sheave 6 stationary. Additionally, the traction mechanism brakes the rotation of the drive sheave 6.

[0026] A suspension body 7 is wound around the drive sheave 6 and the deflector sheave 4. Multiple ropes or belts are used as the suspension body 7. 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.

[0027] The car 8 and counterweight 9 are suspended by the suspension body 7. The car 8 and counterweight 9 move up and down within the hoistway 1 by rotating the drive sheave 6. The elevator control device 5 controls the operation of the car 8 by controlling the traction machine 3.

[0028] A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 1. The pair of car guide rails guide the lifting and lowering of the car 8. The pair of counterweight guide rails guide the lifting and lowering of the counterweight 9.

[0029] The car 8 has a car frame 10 and a car compartment 11. A suspension body 7 is connected to the car frame 10. The car compartment 11 is supported on the car frame 10. A first car door 12a and a second car door 12b are provided on the front surface of the car compartment 11. The first car door 12a and the second car door 12b open and close the car entrance / exit by sliding horizontally in opposite directions. The first car door 12a and the second car door 12b constitute part of the elevator door device of this embodiment.

[0030] A door controller 13 is installed on the car 8. The door controller 13 controls the opening and closing of the first car door 12a and the second car door 12b. A car door switch (not shown) is installed on the car 8. The car door switch detects whether the first car door 12a and the second car door 12b are in the fully closed position.

[0031] Each multi-level station is equipped with a first-level station door 14a and a second-level station door 14b. The first-level station door 14a and the second-level station door 14b open and close the station entrance / exit by sliding horizontally in opposite directions. When the car 8 stops, the first-level station door 14a and the second-level station door 14b open and close in conjunction with the first car door 12a and the second car door 12b.

[0032] Figure 2 This is a front view showing the overall structure of the elevator door device according to this embodiment. The elevator door device of this embodiment is installed in the car compartment 11. Figure 2 This shows the structure of the front surface of the car compartment 11 as viewed from the landing side.

[0033] A car door frame 21 is fixed to the car compartment 11. The car door frame 21 is positioned above the car entrance / exit 20. A car door track 22 is provided on the car door frame 21. The car door track 22 is arranged horizontally and parallel to the width direction of the car entrance / exit 20. The width direction of the car entrance / exit 20 is parallel to the direction of opening and closing of the first car door 12a and the second car door 12b. Figure 2 The left and right directions.

[0034] A drive-side car door pulley 32 is provided at one end of the car door frame 21 along its length. A driven-side car door pulley 24 is provided at the other end of the car door frame 21 along its length. The length direction of the car door frame 21 is parallel to the width direction of the car entrance / exit 20.

[0035] The drive-side car door pulley 32 is a two-stage pulley consisting of a large-diameter section 32-1 and a small-diameter section 32-2 arranged coaxially as one unit. The small-diameter section 32-2 has a smaller diameter than the large-diameter section 32-1. An annular drive belt 25 is wound around the small-diameter section 32-2 of the drive-side car door pulley 32 and the driven-side car door pulley 24.

[0036] A first car door hanger 26a is fixed to the upper part of the first car door 12a. The first car door 12a is suspended from the car door track 22 by the first car door hanger 26a and opens and closes along the car door track 22. The first car door hanger 26a is connected to the lower part of the drive belt 25.

[0037] A second car door hanger 26b is fixed to the upper part of the second car door 12b. The second car door 12b is suspended from the car door track 22 via the second car door hanger 26b and opens and closes along the car door track 22. The second car door hanger 26b is connected to the upper part of the drive belt 25.

[0038] A motor 27 is fixed to the car door frame 21. The operation of the motor 27 is controlled by the door controller 13. A motor pulley 31 is fixed to the output shaft of the motor 27.

[0039] The rotation axis of the motor pulley 31 is parallel to the rotation axis of the drive-side car door pulley 32. The motor pulley 31 has the same diameter as the large-diameter portion 32-1 of the drive-side car door pulley 32. A ring-shaped transmission body 33 is wound around the motor pulley 31 and the large-diameter portion 32-1. The transmission body 33 transmits driving force from the motor pulley 31 to the drive-side car door pulley 32. The transmission body 33 may be a belt, chain, rope, etc.

[0040] Figure 3 This diagram shows the main components of the elevator door device according to this embodiment. Figure 3 The diagram shows the structure of the motor pulley 31, the drive-side car door pulley 32, and the transmission body 33 viewed along the rotation axis of each pulley. Figure 4 It is an enlarged representation Figure 3 The diagram shows the motor pulley 31. Figure 5 It is an enlarged representation Figure 3 The diagram shows the drive-side car door pulley 32. Figure 6 This diagram shows the positions of the first mounting portion 31b and the second mounting portion 32b in the elevator door device of this embodiment. Figure 6The diagram shows the structure of the motor pulley 31 and the drive-side car door pulley 32 viewed along the rotation axis of each pulley. Figure 7 It indicates viewing from the side. Figure 3 A diagram showing the structure of the motor pulley 31, the drive-side car door pulley 32, and the connecting component 34.

[0041] like Figures 3 to 7 As shown, the motor pulley 31 has a first rotating shaft 31a, a first mounting portion 31b, and a first outer peripheral surface 31c. The first rotating shaft 31a serves as the rotation center of the motor pulley 31. When viewed along the direction of the first rotating shaft 31a, the first mounting portion 31b is positioned offset from the first rotating shaft 31a. A transmission body 33 is wound around the first outer peripheral surface 31c.

[0042] The drive-side car door pulley 32 has a second rotation axis 32a, a second mounting portion 32b, and a second outer peripheral surface 32c. The second rotation axis 32a serves as the rotation center of the drive-side car door pulley 32. When viewed along the direction of the second rotation axis 32a, the second mounting portion 32b is located at a position offset from the second rotation axis 32a. In this embodiment, the second mounting portion 32b is located at the small-diameter portion 32-2 of the drive-side car door pulley 32. However, the second mounting portion 32b may also be located at the large-diameter portion 32-1 of the drive-side car door pulley 32. A transmission body 33 is wound around the second outer peripheral surface 32c.

[0043] The motor pulley 31 and the drive-side car door pulley 32 are connected to each other via an arm-shaped connecting member 34. The connecting member 34 extends in a straight line in a plane perpendicular to the first rotation axis 31a and the second rotation axis 32a. The connecting member 34 extends substantially parallel to the straight line connecting the first rotation axis 31a and the second rotation axis 32a. The connecting member 34 has rigidity capable of transmitting driving force between the motor pulley 31 and the drive-side car door pulley 32.

[0044] One end 34a of the connecting member 34 along its length is rotatably mounted to the first mounting portion 31b of the motor pulley 31. The other end 34b of the connecting member 34 along its length is rotatably mounted to the second mounting portion 32b.

[0045] like Figure 7 As shown, a first pin 35a and an intermediate component 42 are provided in the first mounting portion 31b. The intermediate component 42 protrudes from the side of the motor pulley 31 and extends along the first rotation axis 31a. The dimension of the intermediate component 42 in the direction along the first rotation axis 31a is equal to the width of the small diameter portion 32-2 in the direction along the second rotation axis 32a.

[0046] The first pin 35a protrudes further from the front end of the intermediate member 42 in a projecting direction and extends along the first axis of rotation 31a. The first pin 35a has a circular cross-sectional shape in a section perpendicular to the first axis of rotation 31a.

[0047] When viewed along the direction of the first rotation axis 31a, the diameter of the intermediate member 42 is larger than the diameter of the first pin 35a. A stepped surface 42a perpendicular to the first rotation axis 31a is formed between the intermediate member 42 and the first pin 35a. The connecting member 34 can slide along the stepped surface 42a. By providing the intermediate member 42, even when the width of the motor pulley 31 is different from the width of the drive-side car door pulley 32, as in this embodiment, the connecting member 34 can be used to connect the motor pulley 31 and the drive-side car door pulley 32.

[0048] A circular first hole 39a is formed at one end 34a of the connecting member 34. The first hole 39a extends in the direction along the first rotation axis 31a. The diameter of the first hole 39a is larger than the diameter of the first pin 35a. The first pin 35a is inserted into the first hole 39a. In a plane perpendicular to the first rotation axis 31a, a gap 36 is formed between the outer peripheral surface of the first pin 35a and the inner peripheral surface of the first hole 39a. That is, a clearance is provided between the outer peripheral surface of the first pin 35a and the inner peripheral surface of the first hole 39a.

[0049] Because a clearance is provided between the first pin 35a and the first hole 39a, one end 34a of the connecting member 34 is not constrained by the first mounting portion 31b in a plane perpendicular to the first rotation axis 31a. Therefore, even without a bearing, the connecting member 34 can rotate freely relative to the motor pulley 31 about the first pin 35a. Furthermore, the connecting member 34 can move relative to the motor pulley 31 in a plane perpendicular to the first rotation axis 31a by an amount equivalent to the clearance 36.

[0050] A second pin 35b is provided in the second mounting portion 32b. The second pin 35b protrudes from the side of the small-diameter portion 32-2 of the drive-side car door pulley 32 and extends in the direction along the second rotation axis 32a. The second pin 35b has a circular cross-sectional shape in a section perpendicular to the second rotation axis 32a.

[0051] A circular second hole 39b is formed at the other end 34b of the connecting member 34. The second hole 39b extends in the direction along the second rotation axis 32a. A bearing 37 is provided inside the second hole 39b. The bearing 37 is coaxially arranged with the second hole 39b. A second pin 35b is inserted into the bearing 37. A C-shaped retaining ring 38 is installed on the second pin 35b. This prevents the second pin 35b from falling out of the bearing 37.

[0052] The connecting member 34 rotates freely about the second pin 35b relative to the drive-side car door pulley 32 in a plane perpendicular to the second rotation axis 32a. There is substantially no clearance between the second hole 39b and the bearing 37, and between the bearing 37 and the second pin 35b. Therefore, the movement of the connecting member 34 relative to the drive-side car door pulley 32 is restricted in the plane perpendicular to the second rotation axis 32a.

[0053] like Figure 6 As shown, when viewed along the directions of the first rotation axis 31a and the second rotation axis 32a, let L1 be the distance between the center of the first rotation axis 31a and the center of the first mounting portion 31b, and L2 be the distance between the center of the second rotation axis 32a and the center of the second mounting portion 32b. At this time, distances L1 and L2 are equal (L1 = L2). In this embodiment, the center of the first mounting portion 31b is the center of the first pin 35a, and the center of the second mounting portion 32b is the center of the second pin 35b.

[0054] Furthermore, let θ1 be the angle formed by a plane parallel to the first rotation axis 31a and passing through the center of the first rotation axis 31a and the first mounting portion 31b, and a reference plane 40 parallel to the first rotation axis 31a. Let θ2 be the angle formed by a plane parallel to the second rotation axis 32a and passing through the center of the second rotation axis 32a and the second mounting portion 32b, and a reference plane 41 parallel to the reference plane 40. In this case, angle θ1 and angle θ2 are equal (θ1 = θ2). Reference plane 40 and reference plane 41 are, for example, horizontal planes.

[0055] That is, when viewed along the direction of the first rotation axis 31a and the second rotation axis 32a, the relative position of the first mounting portion 31b with respect to the first rotation axis 31a is the same as the relative position of the second mounting portion 32b with respect to the second rotation axis 32a. In other words, the relationship between the position of the first rotation axis 31a and the position of the first mounting portion 31b is the same as the relationship between the position of the second rotation axis 32a and the position of the second mounting portion 32b.

[0056] In this embodiment, the diameter of the motor pulley 31 is the same as the diameter of the large-diameter portion 32-1 of the drive-side car door pulley 32. Therefore, when the driving force is transmitted from the motor pulley 31 to the drive-side car door pulley 32 via the transmission body 33, the rotation angle of the drive-side car door pulley 32 is the same as the rotation angle of the motor pulley 31. Thus, even if the motor pulley 31 and the drive-side car door pulley 32 rotate, the relative position of the first mounting portion 31b relative to the first rotation axis 31a and the relative position of the second mounting portion 32b relative to the second rotation axis 32a can be maintained in the same state.

[0057] Next, the operation of the elevator door assembly will be explained. When the motor 27 operates, the motor pulley 31 rotates under the driving force of the motor 27. The rotation of the motor pulley 31 is transmitted via the transmission body 33 to the large-diameter portion 32-1 of the drive-side car door pulley 32. As a result, the large-diameter portion 32-1 and the small-diameter portion 32-2 of the drive-side car door pulley 32 rotate together. When the small-diameter portion 32-2 of the drive-side car door pulley 32 rotates, the drive belt 25 circulates, and the driven-side car door pulley 24 rotates. Through the circulation of the drive belt 25, the first car door 12a and the second car door 12b open and close. The first car door 12a and the second car door 12b open and close the car entrance / exit 20 by the driving force transmitted from the motor 27 via the motor pulley 31, the transmission body 33, the drive-side car door pulley 32, and the drive belt 25.

[0058] The connecting component 34 maintains a state that is approximately parallel to the straight line connecting the first rotating shaft 31a and the second rotating shaft 32a, while moving according to the rotation of the motor pulley 31 and the drive-side car door pulley 32.

[0059] Thus, under normal conditions where the transmission body 33 does not break or slip, the driving force is transmitted from the motor pulley 31 to the drive-side car door pulley 32 via the transmission body 33. In this embodiment, since there is a clearance between the first pin 35a and the first hole 39a, the connecting member 34 does not transmit driving force from the motor pulley 31 to the drive-side car door pulley 32 under normal conditions.

[0060] Here, when the first car door 12a and the second car door 12b are closing, safety devices such as safety boots may detect contact between the user and the door, or that the user is trapped. In this case, the door controller 13 performs door reversal control to reverse the movement of the first car door 12a and the second car door 12b. During door reversal control, the rotation direction of the motor 27 is reversed, causing a sharp change in the rotation speed of the motor pulley 31. Therefore, the transmission body 33 is more likely to break or slip during door reversal control.

[0061] In the event of breakage or slippage of the transmission body 33, the rotation of the motor pulley 31 caused by the driving force of the motor 27 is transmitted to the drive-side car door pulley 32 via the connecting member 34. As a result, the large-diameter portion 32-1 and the small-diameter portion 32-2 of the drive-side car door pulley 32 rotate as a unit. When the small-diameter portion 32-2 of the drive-side car door pulley 32 rotates, the drive belt 25 circulates, and the driven-side car door pulley 24 rotates. Through the circulation of the drive belt 25, the first car door 12a and the second car door 12b open and close. The first car door 12a and the second car door 12b open and close the car entrance / exit 20 using the driving force transmitted from the motor 27 via the motor pulley 31, the connecting member 34, the drive-side car door pulley 32, and the drive belt 25.

[0062] In this way, if the transmission body 33 breaks or slips, the connecting component 34 replaces the transmission body 33 to transmit the driving force from the motor pulley 31 to the drive-side car door pulley 32.

[0063] As described above, the elevator door device of this embodiment includes a motor pulley 31 and a drive-side car door pulley 32, an annular transmission body 33, a first car door 12a and a second car door 12b, and a connecting member 34. The transmission body 33 is wound around the motor pulley 31 and the drive-side car door pulley 32. The first car door 12a and the second car door 12b are respectively configured to open and close by means of a driving force transmitted between the motor pulley 31 and the drive-side car door pulley 32 via the transmission body 33. The connecting member 34 connects the motor pulley 31 and the drive-side car door pulley 32. The connecting member 34 has rigidity capable of transmitting the driving force between the motor pulley 31 and the drive-side car door pulley 32. Here, the motor pulley 31 is an example of a first pulley. The drive-side car door pulley 32 is an example of a second pulley. The first car door 12a and the second car door 12b are examples of doors.

[0064] According to this structure, in the event of breakage or slippage of the transmission body 33, driving force can be transmitted from the motor pulley 31 to the drive-side car door pulley 32 via the connecting member 34. Therefore, even in the event of breakage or slippage of the transmission body 33, the opening and closing control of the first car door 12a and the second car door 12b can still be performed.

[0065] In a typical elevator door system, if the transmission element breaks or slips during door reversal control, the driving force is no longer transmitted from the motor pulley to the drive-side car door pulley. Therefore, the driving force from the motor in the opening direction is not transmitted to the first and second car doors. Consequently, the first and second car doors do not reverse their movement; they continue their closing action due to inertia.

[0066] In contrast, in this embodiment, if the transmission body 33 breaks or slips during door reversal control, the driving force is transmitted from the motor pulley 31 to the drive-side car door pulley 32 via the connecting member 34. Therefore, the driving force from the opening direction of the motor 27 is transmitted to the first car door 12a and the second car door 12b. Thus, during door reversal control, the operation of the first car door 12a and the second car door 12b can be reversed more reliably.

[0067] In the elevator door assembly of this embodiment, the motor pulley 31 has: a first rotating shaft 31a, which serves as the rotation center of the motor pulley 31; and a first mounting portion 31b, which is disposed at a position offset from the first rotating shaft 31a. One end 34a of the connecting member 34 is rotatably mounted to the first mounting portion 31b. The drive-side car door pulley 32 has: a second rotating shaft 32a, which serves as the rotation center of the drive-side car door pulley 32; and a second mounting portion 32b, which is disposed at a position offset from the second rotating shaft 32a. The other end 34b of the connecting member 34 is rotatably mounted to the second mounting portion 32b.

[0068] In the elevator door assembly of this embodiment, a first hole 39a extending in the direction along the first rotation axis 31a is formed at one end 34a. A first pin 35a extending in the direction along the first rotation axis 31a is formed at the first mounting portion 31b. The first pin 35a is inserted into the first hole 39a. A clearance is provided between the outer peripheral surface of the first pin 35a and the inner peripheral surface of the first hole 39a. Here, the first hole 39a is an example of a hole. The first pin 35a is an example of a pin.

[0069] According to this structure, the connecting member 34 can prevent the transmission force from the motor pulley 31 to the drive-side car door pulley 32 without the transmission body 33 breaking or slipping. Therefore, the connecting member 34 is less prone to fatigue failure or other adverse conditions. Thus, the possibility of adverse conditions in the connecting member 34 and the breakage or slippage of the transmission body 33 occurring simultaneously can be reduced. Therefore, situations where the opening and closing control of the first car door 12a and the second car door 12b cannot be performed can be more reliably avoided.

[0070] In the elevator door device of this embodiment, the relative position of the first mounting part 31b with respect to the first rotating shaft 31a is the same as the relative position of the second mounting part 32b with respect to the second rotating shaft 32a.

[0071] According to this structure, the distance between the first mounting portion 31b and the second mounting portion 32b can be kept constant when the motor pulley 31 and the drive-side car door pulley 32 rotate. Therefore, the clearance between the first pin 35a and the first hole 39a can be reduced. Therefore, in the event of breakage or slippage of the transmission body 33, the driving force can be quickly transmitted from the motor pulley 31 to the drive-side car door pulley 32 through the connecting member 34.

[0072] Implementation method 2.

[0073] The elevator door device of Embodiment 2 will be described. Figure 8 This diagram shows the main components of the elevator door device according to this embodiment. Figure 8 The diagram shows the structure of the motor pulley 31, the drive-side car door pulley 32, the transmission body 33, and the connecting component 34 as viewed along the directions of the first rotation axis 31a and the second rotation axis 32a.

[0074] like Figure 8 As shown, when viewed along the direction of the first rotation axis 31a, let L1 be the distance between the center of the first rotation axis 31a and the center of the first mounting portion 31b, and L3 be the distance between the first rotation axis 31a and the first outer peripheral surface 31c. In this case, distance L1 is longer than half the distance L3 (L1 > L3 / 2). That is, the first mounting portion 31b is positioned closer to the outer periphery than the center of the distance between the first rotation axis 31a and the first outer peripheral surface 31c, i.e., closer to the outer periphery of the motor pulley 31.

[0075] When viewed along the direction of the second rotation axis 32a, let L2 be the distance between the center of the second rotation axis 32a and the second mounting portion 32b, and L4 be the distance between the second rotation axis 32a and the second outer peripheral surface 32c. In this case, distance L2 is longer than half the distance L4 (L2 > L4 / 2). That is, the second mounting portion 32b is positioned on the outer periphery side, closer to the outer periphery of the drive-side car door pulley 32, than the center of the distance between the second rotation axis 32a and the second outer peripheral surface 32c. The other structures in Embodiment 2 are the same as in Embodiment 1.

[0076] As explained above, in the elevator door assembly of this embodiment, the motor pulley 31 has a first outer peripheral surface 31c around which the transmission body 33 winds. The distance L1 between the first rotating shaft 31a and the first mounting portion 31b is longer than half the distance L3 between the first rotating shaft 31a and the first outer peripheral surface 31c. The drive-side car door pulley 32 has a second outer peripheral surface 32c around which the transmission body 33 winds. The distance L2 between the second rotating shaft 32a and the second mounting portion 32b is longer than half the distance L4 between the second rotating shaft 32a and the second outer peripheral surface 32c.

[0077] When the driving force is transmitted from the motor pulley 31 to the drive-side car door pulley 32 through the connecting member 34, the connecting member 34 may deform due to the torque of the motor 27. If the connecting member 34 deforms, the rotation of the motor pulley 31 and the rotation of the drive-side car door pulley 32 may become misaligned.

[0078] However, in this embodiment, the first mounting portion 31b and the second mounting portion 32b are respectively provided on the outer periphery of the pulley, thus reducing the load acting on the connecting member 34. This, in turn, suppresses deformation of the connecting member 34.

[0079] Furthermore, in this embodiment, the first mounting portion 31b and the second mounting portion 32b are respectively provided at a position near the outer periphery of the pulley, thus extending the length of the circumference by which one end 34a and the other end 34b of the connecting member 34 can move. Therefore, even if the connecting member 34 deforms, the ratio of the deformation amount of the connecting member 34 to the length of these circumferences can be reduced. Thus, the influence of the deformation of the connecting member 34 on the rotational offset between the motor pulley 31 and the drive-side car door pulley 32 can be suppressed.

[0080] Furthermore, a gap 36, caused by the tolerance of the pin or the hole, or intentionally provided as in Embodiment 1, may sometimes be formed between the outer peripheral surface of the pin and the inner peripheral surface of the hole. When the driving force is transmitted from the motor pulley 31 to the drive-side car door pulley 32 through the connecting member 34, a rotational offset may sometimes occur between the motor pulley 31 and the drive-side car door pulley 32 due to the influence of these gaps.

[0081] However, in this embodiment, since the length of the circumference of each of the two ends 34a and 34b of the connecting member 34 can be extended, the effect of the aforementioned gap on the rotational offset between the motor pulley 31 and the drive-side car door pulley 32 can be suppressed.

[0082] Therefore, in this embodiment, when the driving force is transmitted through the connecting member 34, rotational offset generated between the motor pulley 31 and the drive-side car door pulley 32 can be suppressed. Thus, according to this embodiment, the opening and closing control of the first car door 12a and the second car door 12b can be performed more reliably, and torque transmission losses can be reduced.

[0083] Implementation method 3.

[0084] The elevator door device of Embodiment 3 will be described. Figure 9 This diagram shows the main components of the elevator door device according to this embodiment. Figure 9As shown, a buffer member 43 is provided in the gap between the inner circumferential surface of the first hole 39a and the outer circumferential surface of the first pin 35a. The buffer member 43 is soft and elastic. Rubber, resin, etc. can be used as the material for the buffer member 43.

[0085] The buffer member 43 is fixed to the inner peripheral surface of the first hole 39a or the outer peripheral surface of the first pin 35a. Alternatively, the buffer member 43 can be held between the inner peripheral surface of the first hole 39a and the outer peripheral surface of the first pin 35a by its own elasticity. The softness and elasticity of the buffer member 43 allow the first pin 35a to rotate and move inside the first hole 39a. The other structures in Embodiment 3 are the same as in Embodiment 1.

[0086] As explained above, in the elevator door device of this embodiment, a buffer member 43 is provided between the first pin 35a and the first hole 39a. According to this structure, when the motor pulley 31 rotates, it is possible to prevent the first pin 35a from contacting the inner circumferential surface of the first hole 39a. Therefore, vibration and noise caused by contact between the first pin 35a and the inner circumferential surface of the first hole 39a can be suppressed.

[0087] Implementation method 4.

[0088] The elevator door device of Embodiment 4 will be described. Figure 10 This is a diagram showing the structure of the elevator door device according to this embodiment. (As shown) Figure 10 As shown, the elevator door device of this embodiment has a linkage mechanism 44. The linkage mechanism 44 is configured by connecting multiple linkage components 44a, 44b, 44c, 44d, 44e, 44f, and 44g.

[0089] In this embodiment of the elevator door device, unlike embodiments 1-3, the first car door 12a and the second car door 12b are opened and closed via a linkage mechanism 44. In this type of elevator door device, to prevent interference between the motor 27 and the car ceiling, etc., ... Figure 10 As shown, there is a case where the first pulley 51 on the motor 27 side and the second pulley 52 on the linkage mechanism 44 side are connected by the transmission body 33.

[0090] exist Figure 10 In the structure shown, the transmission body 33 is wound around the first pulley 51 and the second pulley 52. ​​The first pulley 51 is a motor pulley fixed to the output shaft of the motor 27. The second pulley 52 is configured to transmit the driving force transmitted from the motor 27 via the transmission body 33 to the linkage mechanism 44. The first car door 12a and the second car door 12b open and close the car entrance / exit by the driving force transmitted from the motor 27 via the first pulley 51, the transmission body 33, and the second pulley 52 to the linkage mechanism 44.

[0091] In the elevator door device of this embodiment, the first pulley 51 and the second pulley 52 are connected by a connecting member 34, just like in embodiments 1 to 3. Therefore, the same effects as in embodiments 1 to 3 can be obtained in this embodiment.

[0092] In the above embodiments, a clearance is provided between the first pin 35a and the first hole 39a, but it is also possible not to provide a clearance between the first pin 35a and the first hole 39a. That is, the connecting member 34 can also be configured to transmit driving force from the motor pulley 31 to the drive-side car door pulley 32 under normal conditions.

[0093] In the above embodiments, a clearance is provided between the first pin 35a and the first hole 39a, and a bearing 37 is provided between the second pin 35b and the second hole 39b, but this is not a limitation. For example, a clearance may be provided between the second pin 35b and the second hole 39b, and a bearing may be provided between the first pin 35a and the first hole 39a. In this case, for example in embodiment 1, the drive-side car door pulley 32 is an example of a first pulley, and the motor pulley 31 is an example of a second pulley. Alternatively, a clearance may be provided between both the first pin 35a and the first hole 39a and between the second pin 35b and the second hole 39b.

[0094] In the above embodiments, a first pin 35a is formed on the motor pulley 31, and a first hole 39a is formed on the connecting member 34. However, it is also possible that the pin is formed on the connecting member 34, and the hole for inserting the pin is formed on the motor pulley 31. In addition, in this embodiment, a second pin 35b is formed on the drive-side car door pulley 32, and a second hole 39b is formed on the connecting member 34. However, it is also possible that the pin is formed on the connecting member 34, and the hole for inserting the pin is formed on the drive-side car door pulley 32.

[0095] The above-described embodiments 1 to 4 can be combined with each other for implementation.

[0096] Label Explanation

[0097] 1: Shaft; 2: Machine room; 3: Traction machine; 4: Deflector sheave; 5: Elevator control device; 6: Drive sheave; 7: Suspension body; 8: Car; 9: Counterweight; 10: Car frame; 11: Car compartment; 12a: First car door; 12b: Second car door; 13: Door controller; 14a: First landing door; 14b: Second landing door; 20: Car entrance / exit; 21: Car door frame; 22: Car door track; 24: Driven side car door pulley; 25: Drive belt; 26a: First car door hanger; 26b: Second car door hanger; 27: Motor; 31: Motor pulley; 31a: First rotating shaft; 31b: First mounting part; 31c: First outer peripheral surface; 32: Driven side car door pulley; 3 2-1: Large diameter section; 32-2: Small diameter section; 32a: Second rotating shaft; 32b: Second mounting section; 32c: Second outer peripheral surface; 33: Transmission body; 34: Connecting component; 34a: One end; 34b: The other end; 35a: First pin; 35b: Second pin; 36: Clearance; 37: Bearing; 38: Retaining ring; 39a: First hole; 39b: Second hole; 40, 41: Reference surface; 42: Intermediate component; 42a: Stepped surface; 43: Buffer component; 44: Linkage mechanism; 44a, 44b, 44c, 44d, 44e, 44f, 44g: Linkage component; 51: First pulley; 52: Second pulley; L1, L2, L3, L4: Distance; θ1, θ2: Angle.

Claims

1. An elevator door device, comprising: First pulley and second pulley; A ring-shaped transfer body is wound around the first pulley and the second pulley; A door, which opens and closes by means of a driving force transmitted between the first and second pulleys via the transmission body; and The connecting component connects the first pulley and the second pulley. The connecting component has rigidity capable of transmitting driving force between the first pulley and the second pulley. The first pulley has: a first rotating shaft, which serves as the rotation center of the first pulley; and a first mounting portion, which is disposed at a position offset from the first rotating shaft. One end of the connecting component is rotatably mounted to the first mounting portion. The second pulley has: a second rotating shaft, which serves as the center of rotation of the second pulley; and a second mounting portion, which is disposed at a position offset from the second rotating shaft. The other end of the connecting component is rotatably mounted to the second mounting portion.

2. The elevator door device according to claim 1, wherein, A hole extending in the direction along the first rotation axis is formed in one of the ends and the first mounting portion. A pin extending in the direction along the first rotation axis is formed at one end and at the other of the first mounting portion. The pin is inserted into the hole. A clearance is provided between the outer peripheral surface of the pin and the inner peripheral surface of the hole.

3. The elevator door device according to claim 2, wherein, A buffer component is provided between the pin and the hole.

4. The elevator door device according to any one of claims 1 to 3, wherein, The relative position of the first mounting part with respect to the first rotating axis is the same as the relative position of the second mounting part with respect to the second rotating axis.

5. The elevator door device according to any one of claims 1 to 3, wherein, The first pulley has a first outer peripheral surface around which the transmission body can be wound. The distance between the first rotating shaft and the first mounting part is longer than half the distance between the first rotating shaft and the first outer peripheral surface. The second pulley has a second outer peripheral surface around which the transmission body can be wound. The distance between the second rotating shaft and the second mounting part is longer than half the distance between the second rotating shaft and the second outer peripheral surface.

6. The elevator door device according to claim 4, wherein, The first pulley has a first outer peripheral surface around which the transmission body can be wound. The distance between the first rotating shaft and the first mounting part is longer than half the distance between the first rotating shaft and the first outer peripheral surface. The second pulley has a second outer peripheral surface around which the transmission body can be wound. The distance between the second rotating shaft and the second mounting part is longer than half the distance between the second rotating shaft and the second outer peripheral surface.

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