Elevator door arrangement

Abstract

Provided is an elevator door device capable of reducing the space occupied on a car for adjusting the tension of a transmission belt. The elevator door device includes: a motor (17) for opening and closing a car door; a first pulley (19) that rotates with the driving of the motor (17); a transmission belt (20) wound around the first pulley (19) and a second pulley; and a transmission belt tension adjustment mechanism (29) for adjusting the tension of the transmission belt (20). The transmission belt tension adjustment mechanism (29) is configured to be capable of adjusting the tension of the transmission belt (20) by moving the position of the motor (17) in the vertical direction.

Description

Technical Field

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

[0002] Elevator door devices for opening and closing car doors installed in passenger cars have been known for a long time. These devices have a drive source, namely an electric motor, for opening and closing the car doors, utilizing the driving force of the motor to open and close the doors. Patent Document 1 discloses a structure for an elevator door device in which a transmission belt is wound around a first pulley mounted on the drive shaft (rotation shaft) of the electric motor (hereinafter also simply referred to as the "electric motor") for opening and closing the car doors and a second pulley mounted on the passenger car, transmitting the driving force of the electric motor through the transmission belt.

[0003] Typically, when installing an elevator in a building's elevator shaft, the tension of the aforementioned drive belt needs to be adjusted. The tension of the drive belt varies depending on the interval between the first and second pulleys winding the belt. Furthermore, the first pulley is mounted on the motor's drive shaft, and the motor is located in the space above the car. Therefore, to change the drive belt tension, the motor's position needs to be adjusted. Additionally, drive belt tension adjustment is sometimes necessary during maintenance and inspection of existing elevators.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2002-37574 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] However, in existing elevator door systems, the motor for opening and closing the car door is mounted on a motor bracket, which is then positioned above the car. Furthermore, existing elevator door systems are configured to adjust the tension of the drive belt by horizontally moving the motor bracket. Therefore, in the prior art, there is a problem that the space required above the car for adjusting the drive belt tension increases.

[0009] The purpose of this invention is to provide an elevator door device that can reduce the space occupied on the car required for adjusting the tension of the drive belt.

[0010] Technical solutions for solving the problem

[0011] To solve the above problems, for example, the structure described in the technical solution to be protected by the invention may be adopted.

[0012] This application includes several technical solutions to address the aforementioned problems. One example is an elevator door device comprising: a motor for opening and closing the car door; a first pulley that rotates as driven by the motor; a second pulley corresponding to the first pulley; a drive belt wound around the first and second pulleys to transmit the driving force of the motor from the first pulley to the second pulley; and a drive belt tension adjusting mechanism for adjusting the tension of the drive belt. The drive belt tension adjusting mechanism is configured to adjust the tension of the drive belt by moving the position of the motor in the vertical direction.

[0013] Invention Effects

[0014] According to the present invention, the space occupied on the car required for adjusting the tension of the drive belt can be reduced.

[0015] Other technical issues, technical features, and technical effects not mentioned above can be clarified through the following description of the embodiments. Attached Figure Description

[0016] Figure 1 This is a front view showing the structure of the elevator door device according to the first embodiment.

[0017] Figure 2 This is a front view showing the main parts of the elevator door device according to the first embodiment.

[0018] Figure 3 From Figure 2 The diagram shows the movable connection viewed from direction A.

[0019] Figure 4 yes Figure 3 The cross-sectional view of the movable connection at the BB line position shown.

[0020] Figure 5 This is a front view of the structure of a transmission belt tension adjustment mechanism that represents the comparison method.

[0021] Figure 6 This is a front view showing the main parts of the elevator door device according to the second embodiment.

[0022] Figure 7 This is a front view showing the structure of the second fixed bracket of the transmission belt tension adjustment mechanism in the second embodiment.

[0023] Figure 8 This is a front view showing the structure of the movable bracket of the transmission belt tension adjustment mechanism in the second embodiment.

[0024] Figure 9 yes Figure 6 The cross-sectional view of the CC line position of the transmission belt tension adjustment mechanism shown. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In this specification and the drawings, elements having substantially the same function or structure are labeled with the same reference numerals, and repeated descriptions are omitted. Furthermore, in this specification and the drawings, the X, Y, and Z directions are defined as follows: The X, Y, and Z directions are mutually orthogonal directions. Additionally, the X and Y directions are directions parallel to the horizontal plane (horizontal dual-axis directions), and the Z direction is a direction parallel to the vertical plane (vertical direction).

[0026] <First Implementation Method>

[0027] Figure 1 This is a front view showing the structure of the elevator door device according to the first embodiment.

[0028] like Figure 1 As shown, the elevator door assembly 10 is a device for opening and closing the car doors 12a and 12b by moving the car doors 12a and 12b along the car door sill 11. The elevator door assembly 10 has a guide rail frame 15, a car door opening and closing motor 17 mounted on the guide rail frame 15 via a motor bracket 16, and a door opening and closing mechanism 18 that uses the driving force of the motor 17 to open and close the car doors 12a and 12b.

[0029] The guide rail frame 15 is a base component for mounting the motor 17 and the door opening and closing mechanism 18. The guide rail frame 15 is a long strip component that runs along the opening and closing direction (hereinafter also referred to as the "door opening and closing direction") of the car doors 12a and 12b. The door opening and closing direction is parallel to the X direction. Therefore, it will also be referred to as the "door opening and closing direction X" in the following description.

[0030] The motor bracket 16 is mounted on the upper surface of the guide rail frame 15. The motor 17 is mounted on the motor bracket 16 using bolts and nuts (not shown). A first pulley 19 is mounted on the drive shaft (rotation shaft) of the motor 17. The first pulley 19 rotates with the rotation of the drive shaft of the motor 17. A drive belt 20 is wound around the first pulley 19. The drive belt 20 is a loop-shaped drive belt. Furthermore, in... Figure 1 The shape of the motor bracket 16 is simplified in the diagram. The mounting structure of the motor bracket 16 and the motor 17 will be described in detail later.

[0031] The door opening and closing mechanism 18 includes: a pair of pulleys 21a and 21b; a second pulley 22 corresponding to the first pulley 19; a door drive belt 23 wound around the pair of pulleys 21a and 21b; a door hanger 24a installed on the upper part of the car door 12a; a door hanger 24b installed on the upper part of the car door 12b; a hanger roller 25a installed on the door hanger 24a; a hanger roller 25b installed on the door hanger 24b; and a door guide rail 26 for guiding the movement of the door hangers 24a and 24b.

[0032] A pair of pulleys 21a and 21b are arranged at a predetermined distance in the door opening and closing direction X. Pulley 21a is located at one end of the guide rail frame 15 along its length. Figure 1 On the left end side), pulley 21b is configured on the other end side of the guide rail frame 15 along its length direction. Figure 1 (on the right side). And, each pulley 21a, 21b is mounted on the guide rail frame 15.

[0033] The second pulley 22 is coaxially arranged with pulley 21b. The second pulley 22 and pulley 21b are mounted together on the guide rail frame 15. The second pulley 22 is mounted on a shaft shared with pulley 21b and rotates integrally with pulley 21b. A drive belt 20 is wound around the second pulley 22.

[0034] The door hanger 24a is supported by the door guide rail 26 via hanger rollers 25a. The hanger rollers 25a are rotatably mounted on the door hanger 24a. The hanger rollers 25a are arranged on both sides of the door hanger 24a along the length of the door guide rail 26. Furthermore, the hanger rollers 25a are mounted on the door guide rail 26. A drive belt gripping member 27a is mounted on the door hanger 24a. The drive belt gripping member 27a extends upward from the door hanger 24a. The upper end of the drive belt gripping member 27a grips the upper side of the door drive belt 23.

[0035] Similarly, the door hanger 24b is supported by the door guide rail 26 via hanger rollers 25b. The hanger rollers 25b are rotatably mounted on the door hanger 24b. The hanger rollers 25b are arranged on both sides of the door hanger 24b along the length of the door guide rail 26. Furthermore, the hanger rollers 25b are mounted on the door guide rail 26. A drive belt gripping member 27b is installed on the door hanger 24b. The drive belt gripping member 27b extends upward from the door hanger 24b. The upper end of the drive belt gripping member 27b grips the lower side of the door drive belt 23.

[0036] The hanging door guide rail 26 is mounted on the guide rail frame 15. The hanging door guide rail 26 is a guide rail-shaped component that is longer in the door opening and closing direction X. The hanging door guide rail 26 is arranged parallel to the door opening and closing direction X. In addition, the length direction of the hanging door guide rail 26 is parallel to the door opening and closing direction X, and the length direction of the guide rail frame 15 is also parallel to the door opening and closing direction X.

[0037] In the elevator door assembly 10 constructed with the above-described structure, when the motor 17 is driven, the driving force (rotational force) of the motor 17 is transmitted from the first pulley 19 to the second pulley 22 via the transmission belt 20. As a result, pulley 21b rotates integrally with the second pulley 22. Furthermore, when pulley 21b rotates, the door drive belt 23 moves along with the rotation of pulley 21b. At this time, pulley 21a rotates along with the movement of the door drive belt 23. Additionally, when the door drive belt 23 moves, the drive belt gripping members 27a and 27b move in opposite directions in the X direction. Furthermore, the door hanger 24a and the car door 12a move integrally with the drive belt gripping member 27a, and the door hanger 24b and the car door 12b move integrally with the drive belt gripping member 27b.

[0038] This allows the car doors 12a and 12b to move in the opening and closing direction X, thus opening and closing the car doors 12a and 12b. Specifically, as... Figure 1 As shown, with the car doors 12a and 12b closed, the door hangers 24a and 24b and the drive belt grippers 27a and 27b are moved away from each other by the drive of the motor 17, thereby opening the car doors 12a and 12b. Conversely, with the car doors 12a and 12b open, the door hangers 24a and 24b and the drive belt grippers 27a and 27b are moved closer to each other by the drive of the motor 17, thereby closing the car doors 12a and 12b.

[0039] Figure 2 This is a front view showing the main parts of the elevator door device according to the first embodiment. (Example) Figure 2 As shown, the motor 17 is mounted on the guide rail frame 15 via a motor bracket 16. The motor bracket 16 includes a fixed bracket 161 fixed to the guide rail frame 15 and a movable bracket 162 mounted so as to be movable relative to the fixed bracket 161 in the vertical direction Z. The motor 17 is mounted to the movable bracket 162 using bolts and nuts (not shown). The fixed bracket 161 is fixed to the upper surface 15a of the guide rail frame 15 using bolts 28 and nuts (not shown). The movable bracket 162 is configured to be disengaged from the upper surface 15a of the guide rail frame 15. An adjusting bolt 31 is engaged on the movable bracket 162.

[0040] The fixed bracket 161, the movable bracket 162, and the adjusting bolt 31 constitute the belt tension adjusting mechanism 29 for adjusting the tension of the belt 20. The belt tension adjusting mechanism 29 is arranged together with the motor 17 in the space on the car. The belt tension adjusting mechanism 29 will be described in detail below.

[0041] The fixed bracket 161 is an L-shaped bracket, integrally comprising a fixing part 161a and a support part 161b. The fixing part 161a is horizontally arranged, and the support part 161b is vertically arranged. The fixing part 161a is fixed to the upper surface 15a of the guide rail frame 15 using bolts 28 and nuts (not shown). The engaging part 162b is connected to the movable bracket 162 via a movable connecting part 32. The movable connecting part 32 has two locations spaced appropriately in the Z direction. The movable connecting part 32 is the part that connects the movable bracket 162 to the fixed bracket 161 in a manner that allows it to move in the vertical direction (Z direction). The specific structure of the movable connecting part 32 will be described in detail later.

[0042] The movable bracket 162 is a bracket mounted on the fixed bracket 161 in a manner that allows it to move in the vertical direction Z via the movable connecting part 32. The movable bracket 162 integrally includes a motor mounting part 162a, a locking part 162b, and a connecting part 162c. The motor mounting part 162a is the part that mounts the motor 17 using bolts and nuts (not shown). The locking part 162b is the part that engages with the adjusting bolt 31 to adjust the position of the motor 17 and the tension of the drive belt 20.

[0043] The engaging portion 162b has an appropriate thickness and is located at the lower part of the movable bracket 162. The engaging portion 162b is horizontally arranged opposite the upper surface 15a of the guide rail frame 15. A threaded hole 162d is formed in the engaging portion 162b by tapping or the like. The threaded hole 162d is formed to penetrate the engaging portion 162b in the thickness direction.

[0044] The connecting portion 162c is used to connect the movable bracket 162 to the fixed bracket 161. The connecting portion 162c is arranged perpendicularly to the support portion 161b of the fixed bracket 161. The connecting portion 162c has an appropriate thickness and is provided on the side edge of the movable bracket 162.

[0045] The adjusting bolt 31 is a component used to move (lift) the movable bracket 162 in the Z direction, essentially acting as an adjusting component. The adjusting bolt 31 integrally comprises a head 31a and a threaded portion 31b. To adjust the position of the motor 17 and the tension of the drive belt 20, the adjusting bolt 31 is rotated using a tool (not shown, such as a wrench). The adjusting bolt 31 is positioned in the X direction further away from the fixed bracket 161 than the rotation center Pc of the first pulley 19. The adjusting bolt 31 is positioned with its head 31a facing downwards. The adjusting bolt 31 is positioned vertically upright from the upper surface 15a of the guide rail frame 15. The head 31a of the adjusting bolt 31 contacts the upper surface 15a of the guide rail frame 15. The threaded portion 31b of the adjusting bolt 31 engages with the threaded hole 162d of the movable bracket 162.

[0046] Here, we will discuss the specific structural utilization of the movable connecting part 32. Figure 3 and Figure 4 Please provide an explanation.

[0047] Figure 3 From Figure 2 The diagram shows the movable connection viewed from direction A. Figure 4 yes Figure 3 The cross-sectional view of the movable connection at the BB line position shown.

[0048] like Figure 3 and Figure 4 As shown, the movable connection 32 is the part that connects the fixed bracket 161 and the movable bracket 162 using a bolt 35 and a nut 36. The bolt 35 integrally has a head 35a and a threaded portion 35b. The head 35a of the bolt 35 abuts against the support portion 161b of the fixed bracket 161.

[0049] An elongated hole 161c is formed in the support portion 161b of the fixed bracket 161. The elongated hole 161c is a hole with the Z direction as its major axis and the Y direction as its minor axis. The elongated hole 161c is formed to penetrate the support portion 161b in the thickness dimension (X direction). On the other hand, a through hole 162e is formed in the connecting portion 162c of the movable bracket 162. The through hole 162e is circular when viewed from the axial direction. The inner diameter of the through hole 162e is set to be slightly larger than the outer diameter of the threaded portion 35b of the bolt 35.

[0050] The threaded portion 35b of the bolt 35 is inserted into the elongated hole 161c of the fixed bracket 161 and the through hole 162e of the movable bracket 162. The nut 36 engages with the threaded portion 35b of the bolt 35. Furthermore, the head 35a of the bolt 35 and the nut 36 are configured to clamp the support portion 161b of the fixed bracket 161 and the connecting portion 162c of the movable bracket 162. Thus, the support portion 161b of the fixed bracket 161 and the connecting portion 162c of the movable bracket 162 are fastened by the tightening force generated by the bolt 35 and the nut 36.

[0051] With the movable bracket 162 and the fixed bracket 161 secured by the tightening force of bolts 35 and nuts 36, a rotational torque about the Y-axis is generated on the fixed bracket 161. This rotational torque is roughly divided into two parts. One part is the rotational torque about the Y-axis generated by the vertical load Mg of the motor 17 and the movable bracket 162, and the other part is the rotational torque about the Y-axis generated by the tension Fb of the transmission belt 20. The fixed bracket 161 has a certain mechanical strength (stiffness, etc.) such that even if these rotational torques act on the fixed bracket 161, it can support the motor 17, the first pulley 19, the transmission belt 20, and the movable bracket 162. In addition, the adjusting bolt 31 generates a vertical reaction force Fj as a reaction force to the aforementioned vertical load Mg.

[0052] Next, the method of adjusting the tension of the transmission belt 20 using the transmission belt tension adjustment mechanism 29 constructed with the above structure will be explained.

[0053] First, the tightening force generated by the bolts 35 and nuts 36 is reduced in each movable connection 32. As a result, the movable bracket 162 is temporarily fixed to the fixed bracket 161. In this temporarily fixed state, the movable bracket 162 can be moved in the long axis direction (Z direction) of the elongated hole 161c.

[0054] Next, the adjusting bolt 31 is rotated. At this time, the movable bracket 162 moves in the Z direction according to the rotation direction and amount of the adjusting bolt 31. Specifically, when the adjusting bolt 31 is rotated in one direction, the movable bracket 162 moves upward according to the rotation amount of the adjusting bolt 31; when the adjusting bolt 31 is rotated in another direction, the movable bracket 162 moves downward according to the rotation amount of the adjusting bolt 31. This movement of the movable bracket 162 is permitted by the movement of the threaded portion 35b of the bolt 35 along the elongated hole 161c.

[0055] When the movable bracket 162 moves in the Z direction as described above, the motor 17 and the first pulley 19 move together in the Z direction with the movable bracket 162. At this time, if the first pulley 19 moves upward, the gap between the first pulley 19 and the second pulley 22 widens, thus increasing the tension of the transmission belt 20. Conversely, if the first pulley 19 moves downward, the gap between the first pulley 19 and the second pulley 22 narrows, thus decreasing the tension of the transmission belt 20. Therefore, the tension of the transmission belt 20 can be adjusted by rotating the adjusting bolt 31.

[0056] After adjusting the tension of the drive belt 20, the fastening force generated by the bolts 35 and nuts 36 is strengthened at each movable connection 32. As a result, the movable bracket 162 is formally fixed to the fixed bracket 161.

[0057] Here, use Figure 5 The structure of the belt tension adjustment mechanism in the elevator door device of the comparative embodiment will be described. The definitions of the X, Y, and Z directions are the same as in the first embodiment described above. Furthermore, in the comparative embodiment, the same reference numerals are used for the same components as in the first embodiment, and descriptions are omitted.

[0058] like Figure 5 As shown, the motor 17 is mounted on the motor bracket 16A. The motor bracket 16A is fixed to the upper surface 15a of the guide rail frame 15 using bolts and nuts (not shown). An elongated hole (not shown) in the X direction is formed in the motor bracket 16A, into which the threaded portion of the bolt is inserted. Therefore, with reduced tightening force from the bolts and nuts, the motor bracket 16A and the motor 17 can move in the X direction (horizontal direction).

[0059] An L-shaped bracket 16B is mounted on the upper surface 15a of the guide rail frame 15, spaced apart from the motor bracket 16A in the X direction. The L-shaped bracket 16B is fixed to the upper surface 15a of the guide rail frame 15 using bolts and nuts (not shown). An adjusting bolt 31A is mounted on the motor bracket 16A. The adjusting bolt 31A is horizontally (laterally) positioned. The threaded portion of the adjusting bolt 31A engages with the threaded hole (not shown) of the L-shaped bracket 16B.

[0060] In the belt tension adjustment mechanism described above, when adjusting the tension of the belt 20, the adjusting bolt 31A is rotated while the tightening force generated by the bolts and nuts is reduced. This causes the motor bracket 16A to move in the X direction according to the rotation direction and amount of the adjusting bolt 31A, and the motor 17 and the first pulley 19 move together with the motor bracket 16A in the X direction. As a result, the interval between the first pulley 19 and the second pulley 22 changes, thus allowing the tension of the belt 20 to be adjusted.

[0061] In the belt tension adjustment mechanism of the aforementioned comparative method, an L-shaped bracket 16B is provided in addition to the motor bracket 16A, and the adjusting bolt 31A is horizontally positioned. Thus, the motor bracket 16A, the motor 17, and the first pulley 19 are configured to move in the X direction (horizontal direction) by rotating the adjusting bolt 31A. Therefore, when the belt tension adjustment mechanism is installed in the space of the car, space needs to be ensured on the guide rail frame 15 for arranging the motor bracket 16A, the L-shaped bracket 16B, and the adjusting bolt 31A. Furthermore, in the comparative method, for example, when replacing the motor 17 or the belt 20, to loosen the belt 20, the motor bracket 16A needs to be moved towards... Figure 5The belt tension adjustment mechanism moves in the x1 direction. Therefore, in the comparative method of belt tension adjustment mechanism, the space S2 required on the car to adjust the tension of the belt 20 is large. As a result, in small elevators with limited shaft area, or elevators that need to be updated to be compatible with existing equipment, the belt tension adjustment mechanism occupies a large space on the car, making it difficult to avoid interference with other components.

[0062] In contrast, the elevator door device 10 of the first embodiment has a belt tension adjustment mechanism 29 configured to adjust the tension of the belt 20 by moving the position of the motor 17 in the vertical direction (Z direction). Therefore, compared with the above-described comparison method ( Figure 5 Compared to the previous case, the space S1 occupied on the car required to adjust the tension of the drive belt 20 can be reduced. Figure 2 Therefore, in small elevators with limited shaft area, or elevators that need to be updated to be compatible with existing equipment, interference with other components can be easily avoided.

[0063] In the first embodiment, the motor bracket 16 is composed of a movable bracket 162 and a fixed bracket 161. The motor 17 is mounted on the movable bracket 162, and the fixed bracket 161 is fixed to the guide rail frame 15. The movable bracket 162 is mounted on the fixed bracket 161 in a manner that allows it to move vertically, and the movable bracket 162 is moved vertically using the adjusting bolt 31. This allows the adjusting bolt 31 to support the load of the motor 17, etc., and simultaneously adjust the tension of the transmission belt 20.

[0064] Furthermore, in the first embodiment, an elongated hole 161c is formed in the fixed bracket 161, and the movable bracket 162 can move vertically along the elongated hole 161c. Thus, the tension adjustment of the transmission belt 20 can be achieved with a simple construction.

[0065] Furthermore, in the first embodiment, a threaded hole 162d is formed in the movable bracket 162, and a structure is adopted in which the threaded portion 31b of the adjusting bolt 31 engages with the threaded hole 162d. Therefore, the tension of the transmission belt 20 can be finely adjusted by rotating the adjusting bolt 31.

[0066] Furthermore, in the first embodiment, the adjusting bolt 31 is vertically erected to generate a vertical reaction force Fg against the vertical load Mg of the motor 17 and the movable bracket 162. Thus, the load applied to the fixed bracket 161 can be reduced by the adjusting bolt 31.

[0067] In addition, in the first embodiment described above, an elongated hole 161c is formed in the fixed bracket 161 and a through hole 162e is formed in the movable bracket 162. However, it is not limited to this. A through hole can also be formed in the fixed bracket 161 and an elongated hole can be formed in the movable bracket 162.

[0068] In addition, in the first embodiment described above, a threaded hole 162d is formed in the engaging portion 162b of the movable bracket 162, and a structure is adopted in which the threaded portion 31b of the adjusting bolt 31 engages with the threaded hole 162d. However, it is not limited to this. For example, a nut (not shown) can be fixed to the engaging portion 162b of the movable bracket 162 by welding or the like, and the threaded portion 31b of the adjusting bolt 31 can be engaged with the nut.

[0069] <Second Implementation Method>

[0070] Figure 6 This is a front view showing the main parts of the elevator door device according to the second embodiment.

[0071] Figure 6 The definitions of the X, Y, and Z directions are the same as in the first embodiment described above. However, the elevator door device in the second embodiment differs from that in the first embodiment in the structure of the belt tension adjustment mechanism. This will be explained in detail below.

[0072] like Figure 6 As shown, the transmission belt tension adjustment mechanism 290 has a motor bracket 160 and an adjusting bolt 310. The motor bracket 160 is composed of a fixed bracket 1610 and a movable bracket 1620. The fixed bracket 1610 is composed of a first fixed bracket 1611 and a second fixed bracket 1612.

[0073] The first fixed bracket 1611 is L-shaped. The first fixed bracket 1611 is fixed to the guide rail frame 150 using bolts 51 and nuts 52. The second fixed bracket 1612 is fixed to the guide rail frame 150 using bolts 53 and nuts 54. Furthermore, the first fixed bracket 1611 and the second fixed bracket 1612 are connected to each other in the horizontal direction (X direction) using bolts 55 and nuts 56. The motor 17 is mounted to the movable bracket 1620 using bolts and nuts (not shown). The movable bracket 1620 is mounted to the second fixed bracket 1612 in a manner that allows it to move in the vertical direction.

[0074] Figure 7 This is a front view showing the structure of the second fixed bracket of the transmission belt tension adjustment mechanism in the second embodiment.

[0075] like Figure 7As shown, the second fixed bracket 1612 integrally comprises a motor support portion 1612a, a fixing portion 1612b, and a connecting portion 1612c. The motor support portion 1612a is the part that supports the motor 17 via a movable bracket 1620. The fixing portion 1612b is the part that is fixed to the upper surface 150a of the guide rail frame 150 by bolts 53 and nuts 54. The connecting portion 1612c is the part that is connected to the first fixed bracket 1611 by bolts 55 and nuts 56.

[0076] Four elongated holes 1612d are formed in the motor support portion 1612a. Each elongated hole 1612d has its major axis in the Z direction and its minor axis in the X direction. The elongated holes 1612d are formed to penetrate the motor support portion 1612a in the thickness direction (Y direction). Two through holes 1612e are formed in the fixing portion 1612b. The through holes 1612e are holes into which the threaded portion of the bolt 53 is inserted to fix the fixing portion 1612b to the guide rail frame 150. A through hole 1612f is formed in the connecting portion 1612c. The through hole 1612f is a hole into which the threaded portion of the bolt 55 is inserted to connect the connecting portion 1612c to the first fixing bracket 1611.

[0077] Figure 8 This is a front view showing the structure of the movable bracket of the transmission belt tension adjustment mechanism in the second embodiment.

[0078] like Figure 8 As shown, the movable bracket 1620 integrally includes a motor mounting portion 1620a and a locking portion 1620b. The motor mounting portion 1620a is the part that mounts the motor 17 using bolts and nuts (not shown). Four through holes 1620c are formed in the motor mounting portion 1620a. The four through holes 1620c are provided corresponding to the four elongated holes 1612d mentioned above.

[0079] The engaging portion 1620b is a part that engages with the adjusting bolt 310 to adjust the position of the motor 17 and the tension of the drive belt 20 using the adjusting bolt 310. The engaging portion 1620b has an appropriate thickness and is located at the lower part of the movable bracket 1620. The engaging portion 1620b is horizontally positioned opposite the upper surface 150a of the guide rail frame 150. A threaded hole 1620d is formed in the engaging portion 1620b by tapping or the like. The threaded hole 1620d is formed to penetrate the engaging portion 1620b in the thickness direction. Figure 6 In this configuration, the threaded portion of the adjusting bolt 310 engages with the threaded hole 1620d. The head of the adjusting bolt 310 contacts the upper surface of the fixing portion 1612b. Furthermore, the adjusting bolt 310 is positioned so as to stand vertically upright from the upper surface of the fixing portion 1612b.

[0080] Here, use Figure 9 The connection structure between the second fixed bracket 1612 and the movable bracket 1620 will be described.

[0081] Figure 9 yes Figure 6 The cross-sectional view of the CC line position of the transmission belt tension adjustment mechanism shown.

[0082] like Figure 9 As shown, the motor support portion 1612a of the second fixed bracket 1612 and the motor mounting portion 1620a of the movable bracket 1620 are connected by bolts 57 and nuts 58. The head 57a of the bolt 57 abuts against the motor mounting portion 1620a of the movable bracket 1620. Furthermore, the threaded portion 57b of the bolt 57 is inserted into the through hole 1620c of the motor mounting portion 1620a and the elongated hole 1612d of the motor support portion 1612a. The nut 58 engages with the threaded portion 57b of the bolt 57. The head 57a of the bolt 57 and the nut 58 are configured to clamp the motor support portion 1612a and the motor mounting portion 1620a. Thus, the motor support portion 1612a and the motor mounting portion 1620a are fastened by the tightening force generated by the bolts 57 and the nuts 58.

[0083] Next, a method for adjusting the tension of the transmission belt 20 using the transmission belt tension adjusting mechanism 290 constructed with the above-described structure will be explained.

[0084] First, the tightening force generated by bolts 57 and nut 58 is reduced. As a result, the movable bracket 1620 is temporarily fixed to the second fixed bracket 1612. In this temporarily fixed state, the movable bracket 1620 can be moved in the long axis direction (Z direction) of the elongated hole 1612d.

[0085] Next, the adjusting bolt 310 is rotated. At this time, the movable bracket 1620 moves in the Z direction according to the rotation direction and amount of the adjusting bolt 310. Specifically, when the adjusting bolt 310 is rotated in one direction, the movable bracket 1620 moves upward according to the rotation amount of the adjusting bolt 310; when the adjusting bolt 310 is rotated in the other direction, the movable bracket 1620 moves downward according to the rotation amount of the adjusting bolt 310. This movement of the movable bracket 1620 is permitted by the movement of the threaded portion 57b of the bolt 57 along the elongated hole 1612d.

[0086] When the movable bracket 1620 moves in the Z direction as described above, the motor 17 and the first pulley 19 move together with the movable bracket 1620 in the Z direction. Thus, similar to the first embodiment described above, the tension of the drive belt 20 can be adjusted.

[0087] After adjusting the tension of the drive belt 20, the tightening force generated by the bolts 57 and nuts 58 is increased. As a result, the movable bracket 1620 is formally fixed to the second fixed bracket 1612.

[0088] In this way, the belt tension adjusting mechanism 290 of the second embodiment is configured similarly to that of the first embodiment, enabling the adjustment of the tension of the belt 20 by moving the position of the motor 17 in the vertical direction (Z direction). Therefore, compared with the above-described comparison method ( Figure 5 Compared to the previous case, the space S3 required in the car for adjusting the tension of the drive belt 20 can be reduced. Figure 6 ).

[0089] In the second embodiment, the fixed bracket 1610 is composed of a first fixed bracket 1611 and a second fixed bracket 1612, which are respectively fixed to the guide rail frame 150. Furthermore, the first fixed bracket 1611 and the second fixed bracket 1612 are connected to each other in the horizontal direction (X direction). Thus, the vertical load of the motor 17 and the movable bracket 1620 can be stably supported by the fixed bracket 1610.

[0090] Furthermore, the same effects as those in the first embodiment can be achieved in the second embodiment.

[0091] In addition, in the second embodiment described above, an elongated hole 1612d is formed in the second fixed bracket 1612 and a through hole 1620c is formed in the movable bracket 1620. However, it is not limited to this. An elongated hole can also be formed in the movable bracket 1620 and a through hole can be formed in the second fixed bracket 1612.

[0092] In addition, in the second embodiment described above, a threaded hole 1620d is formed in the engaging portion 1620b of the movable bracket 1620, and a structure is adopted in which the threaded portion of the adjusting bolt 310 engages with the threaded hole 1620d. However, it is not limited to this. For example, a nut (not shown) can be fixed to the engaging portion 1620b of the movable bracket 1620 by welding or the like, and the threaded portion of the adjusting bolt 310 can be engaged with the nut.

[0093] Furthermore, the present invention is not limited to the embodiments described above and includes various modifications. For example, in the above embodiments, detailed descriptions have been provided to facilitate understanding of the invention, but the present invention does not necessarily possess all the structures described in the above embodiments. Additionally, a portion of the structure of a certain embodiment can be replaced with the structure of another embodiment. Furthermore, the structure of another embodiment can be added to the structure of a certain embodiment. Moreover, regarding a portion of the structure of each embodiment, it can be deleted, have other structures added, or be replaced with other structures.

[0094] Explanation of reference numerals in the attached figures

[0095] 10…Elevator door assembly, 12a, 12b…Car door, 15…Guide rail frame (base component), 16…Motor bracket, 17…Motor, 19…First pulley, 20…Drive belt, 22…Second pulley, 29…Drive belt tension adjustment mechanism, 31…Adjusting bolt (adjusting component), 31b…Threaded part, 161, 1610…Fixed bracket, 161c, 1612d…Elongated hole, 162, 1620…Modible bracket, 162d, 1620d…Threaded hole, 1611…First fixed bracket, 1612…Second fixed bracket, Mg…Vertical load, Fg…Vertical reaction force, Z…Vertical direction.

Claims

1. An elevator door device, characterized in that, include: The electric motor used to open and close the car doors; The first pulley rotates as driven by the electric motor; A second pulley is provided corresponding to the first pulley; A drive belt, wound around the first and second pulleys, transmits the driving force of the electric motor from the first pulley to the second pulley; and A belt tension adjusting mechanism for adjusting the tension of the transmission belt, wherein, The belt tension adjustment mechanism is configured to adjust the belt tension by moving the position of the motor in the vertical direction. The transmission belt tension adjustment mechanism includes: a fixed bracket fixed to a base component; a movable bracket mounted on the fixed bracket in a manner capable of moving in the vertical direction; and an adjustment component for moving the movable bracket in the vertical direction. The electric motor is mounted on the movable bracket. The fixing bracket includes a first fixing bracket and a second fixing bracket, which are respectively fixed to the base component, and the first fixing bracket and the second fixing bracket are connected to each other in the horizontal direction. The second fixed bracket integrally comprises a motor support, a fixing part, and a connecting part, wherein the motor support supports the movable bracket, enabling it to move in the vertical direction; the fixing part is fixed to the base component; and the connecting part is connected to the first fixed bracket. A threaded hole is formed in the movable bracket. The adjusting component is composed of an adjusting bolt having a threaded portion that engages with the threaded hole. The adjusting component is vertically erected from the upper surface of the fixing part with the head of the adjusting bolt in contact with the upper surface of the fixing part of the second fixing bracket, so as to generate a vertical reaction force to resist the vertical load of the motor and the movable bracket.

2. The elevator door device as described in claim 1, characterized in that, An elongated hole is formed in either the second fixed bracket or the movable bracket. The movable bracket is capable of moving vertically along the elongated hole.

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