JP4828246B2 - Elevator car door lock device - Google Patents

Description

  The present invention relates to a car door locking device for an elevator that locks the car door in an elevator such as an elevator.

  FIG. 8 is a front view showing a conventional elevator car door locking device 1 of an elevator. Hereinafter, the elevator car door locking device 1 is simply referred to as the locking device 1. The locking device 1 includes a first engagement member 6 provided on a car door 5 having a hanger 4 that rotatably supports a roller 3 traveling on a door rail 2, and a first engagement member in a state where the car door 5 is closed. A second engaging member 7 is provided opposite to the combined member 6, and the second engaging member 7 is driven to the engaging position with the first engaging member 6 via the operating shaft 8. An electromagnetic device 11 attached to the frame 17; and a return spring 12 provided so as to surround the operating shaft 8 so as to return the second engagement member 7 to a release position from the first engagement member 6. ing. The operating shaft 8 extends in the vertical direction, and the electromagnetic device 11 is provided above the first engaging member 6 with the car door 5 closed. When the electromagnetic device 11 is excited, the operating shaft 8 moves downward, the second engagement member 7 is disposed at the engagement position, and the first engagement member 6 and the second engagement member 7 are moved. Engage and prevent the car door from opening. When the electromagnetic device 11 is demagnetized, the operating shaft 8 moves upward, the second engagement member 7 is disposed at the release position, and the second engagement member 7 is the first engagement member 6. Does not block movement. In the lock device 1, the electromagnetic device 11 is continuously excited during the traveling of the elevator so that the car door 5 cannot be intentionally opened from the inside of the cage during the traveling of the elevator (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 3014886

  In the prior art, the first engagement member 6 is provided on the hanger 4, and the second engagement member 7 abuts on the first engagement member 6, so when the car door 5 moves, The moving force of the car door 5 is directly applied to the second engaging member 7. In order to prevent the car door 5 from being opened, the second engaging member 7 pushes the first engaging member 6 with the same force as the first engaging member 6 pushes the second engaging member 7. Since it is necessary to push, there is a problem that a large load is applied to the second engagement member 7 and the second engagement member 7 is easily damaged.

  Accordingly, an object of the present invention is to provide an elevator car door locking device capable of suppressing damage caused by a load given as the car door moves and locking the car door reliably.

According to the present invention, a car door is wound through a rope by rotating a winding body around which a rope connected to the car door is wound around a rotation axis in a rotation direction corresponding to the opening / closing direction of the car door. A locking device for a car door of an elevator that opens and closes,
A rotating body connected to the winding body and having an engaging portion protruding outward in the radial direction from the outer periphery of the winding body with respect to the rotation axis;
An elevator car comprising engagement means having an engagement piece that is displaced over an insertion position inserted on a movement path of the engagement portion and a disengagement position removed from the movement path of the engagement portion. It is a door locking device.

  According to the present invention, since the rotating body is coupled to the winding body, the rotating body rotates as the winding body rotates. Since the engaging portion of the rotating body protrudes outward in the radial direction from the outer periphery of the winding body with respect to the rotation axis of the winding body, the engaging portion has an outer periphery of the winding body around the rotating axis of the winding body. It moves with a larger trajectory in the radial direction. That is, the moving path of the engaging portion is farther away from the rotation axis in the radial direction than the moving path of the outer periphery of the winding body.

  When the engagement means displaces the engagement piece to the insertion position inserted on the movement path of the engagement portion, the engagement piece and the engagement portion come into contact with each other and the engagement piece is locked. The rotational displacement of the rotating body is prevented. Thereby, it is possible to prevent and lock the winding body connected to the engagement piece. A rope is wound around the winding body, and the rope is connected to the car door, and the car door is opened and closed by rotating the winding body around the rotation axis in a rotation direction corresponding to the opening and closing direction of the car door. Therefore, when the rotation of the wrapping body is locked, the displacement of the car door connected to the wrapping body via the rope is prevented in the opening and closing direction, and the car door can be locked. .

  When the car door of the elevator moves in the opening / closing direction, torque is generated in the winding body via the rope along with the movement of the car door. When the engagement piece is provided at the insertion position, the engagement piece engages with the engagement portion radially outward from the outer periphery of the winding body with respect to the rotation axis, and the torque is represented by a product of distance and force. Therefore, the force given to the engagement piece from the engagement portion can be made smaller than the force given when the engagement piece is brought into direct contact with the car door.

In addition, the present invention includes a rotation drive source having a rotation shaft and rotating the winding body around the rotation axis to open and close the car door,
The winding body and the rotating body are provided coaxially with the rotating shaft.

  According to the present invention, the car door is always directly or indirectly connected to the rotation shaft of the rotation drive source via the cable. Therefore, if the elevator is provided with the rotation drive source having the rotation shaft, Can be applied. The winding body and the rotating body are provided coaxially on the rotation shaft of the rotation driving source, whereby the winding body for transmitting the rotational force of the rotation driving source to the rope can be used. Since there is no need to provide a separate space for installing the rotating body, the installation space can be reduced and the installation is facilitated.

  In the invention, it is preferable that the engagement means displaces the engagement piece in a direction in which the rotation axis extends.

  According to the present invention, even if the moving path of the engaging portion is separated from the rotation axis, the engagement means displaces the engagement piece in the extending direction of the rotation axis, so that the apparatus is large in the radial direction with respect to the rotation axis. Can be prevented.

Further, in the present invention, the rotating body is formed by a disk body in which a plurality of insertion holes are formed at intervals in the circumferential direction on a radially outer peripheral portion,
When the engagement means displaces the engagement piece to the insertion position, the engagement piece is inserted into any of the plurality of insertion holes.

  According to the present invention, when the engaging means moves the engaging piece to the insertion position, the engaging piece is formed in the radially outer peripheral portion of the disc body with a plurality of insertions formed at intervals in the circumferential direction. When the car door moves in the opening / closing direction by being inserted into one of the holes, the inner peripheral surface facing the insertion hole of the rotating body comes into contact with the engagement piece, thereby preventing the car door from being displaced. be able to. The plate-like body that forms the rotating body has a plurality of insertion holes formed at intervals in the circumferential direction on the outer peripheral portion in the radial direction, and the engaging means can insert the engagement piece into any of the insertion holes. Thus, the car door can be locked, which facilitates adjustment of the position at which the car door is locked.

  Further, the present invention is characterized in that the engaging means holds the engaging piece in the insertion position when electric power is supplied, and holds the engaging piece in the disengaged position when electric power is not supplied. To do.

  According to the present invention, when the electric power is supplied, the engaging means can hold the engaging piece in the insertion position to securely lock the car door, and when the electric power is not supplied, The combined piece can be held at the disengaged position so that the car door can be opened and closed. As a result, the supply of power to the elevator device is stopped in the event of a power failure, and when the power to this device is stopped, the engagement piece is held in the disengaged position, so the car door is unlocked and the car It is possible to prevent the passenger from being trapped in the car.

  According to the present invention, when the engagement means displaces the engagement piece to the insertion position inserted on the movement path of the engagement portion, the engagement piece and the engagement portion come into contact with each other, The pieces are locked, the displacement of the rotating body is prevented, and the rotation of the winding body is prevented, thereby preventing the car door from being displaced in the opening / closing direction. When the engagement piece is provided at the insertion position, the engagement piece engages with the engagement portion radially outward from the outer periphery of the winding body with respect to the rotation axis, so that the force applied from the engagement portion to the engagement piece Can be made smaller than the force applied when the engagement piece is brought into direct contact with the car door. Therefore, the load applied to the engagement piece and the engagement portion with the movement of the car door in the opening / closing direction is reduced, thereby preventing the engagement piece and the engagement portion from being damaged and securely locking the car door. can do.

  Further, according to the present invention, the winding body and the rotating body are provided coaxially on the rotation shaft of the rotational drive source, thereby utilizing the winding body for transmitting the rotational force of the rotational drive source to the rope. The installation space can be reduced and the installation is facilitated.

  According to the present invention, even if the moving path of the engaging portion is separated from the rotation axis, the engagement means displaces the engagement piece in the extending direction of the rotation axis, so that the device is moved in the radial direction with respect to the rotation axis. An increase in size can be prevented.

  Further, according to the present invention, the plate-like body forming the rotating body has a plurality of insertion holes formed at intervals in the circumferential direction on the outer peripheral portion in the radial direction, and the engaging means is provided in any of the insertion holes. If the engagement piece is inserted, the car door can be locked, and this facilitates adjustment of the position where the car door is locked.

  Further, according to the present invention, when the power supply to the elevator apparatus is stopped at the time of a power failure and the power to the apparatus is stopped, the engagement piece is held at the disengaged position, so that the car door is unlocked. Thus, it is possible to prevent the passenger of the car from being trapped in the car.

  FIG. 1: is a front view which shows a part of cage | basket | car 21 provided with the locking device 20 of the elevator car door of the elevator of one Embodiment of this invention seeing from the hoistway side. FIG. 2 is a plan view showing a part of the car 21. In the present embodiment, the elevator is realized by an elevator apparatus. Hereinafter, the elevator car door locking device 20 may be simply referred to as the locking device 20. In the figure, only a part of the second and third power transmission means 36b, 36c is shown for ease of illustration.

  The car 21 opens and closes the lock device 20, the car body 22, an opening formed in the car body 22, that is, a car door 24 provided at an entrance for a user to get on and off the car body 22, and the car door 24. And opening / closing means 25. The cage 21 is formed in a substantially rectangular parallelepiped shape in the present embodiment. The car body 22 is formed in a bottomed cylindrical shape, and an opening is formed on one side. The car door 24 has a mechanism of an interlocking sliding door, and is implemented by including three car door portions 24a, 24b, and 24c in the present embodiment. Each car door part 24a-24c is formed in a rectangular plate shape, and each is formed in the same magnitude | size. The car door 24 moves from one side to the other side in the opening / closing direction X to open the opening of the car body 22, and moves from the other end part to one end part to close the opening of the car body 22. Of the opening / closing direction X of the car door 24, the direction in which the car door 24 is directed from the closed position to the open position is referred to as an open direction X1, and the direction in which the car door 24 is directed from the open position to the closed position is referred to as a closed direction X2.

  The opening / closing means 25 is provided at the upper end of the car body 22 and moves the car door 24 in the opening / closing direction X to open / close the car door 24. The opening / closing means 25 is provided on the car body 22 and the first, second and third door hangers 26a, 26b and 26c provided on the first, second and third door portions 24a, 24b and 24c of the car door 24, respectively. The first, second, and third guide rail portions 27a, 27b, and 27c for guiding the first to third door hangers 26a to 26c, the rotational drive source 31, and the first, second, and third power transmissions, respectively. And means 36a, 36b, 36c.

  The first to third door hangers 26a to 26c are fixed to the upper ends of the first to third car door portions 24a to 24c constituting the car door 24 by bolts and nuts, respectively. The first door hanger 26a is fixedly provided at the upper end of the first car door portion 24a. The second door hanger 26b is fixedly provided at the upper end of the second car door portion 24b. The third door hanger 26c is fixed to the upper end of the third car door portion 24c. In the closed state, the car door 24 is provided with the first car door portion 24a closest to the closing direction X2 among the first to third car door portions 24a to 24c, and the third car door portion closest to the opening / closing direction X1. 24c is provided. Of the first to third car door portions 24a to 24c, when the first car door portion 24a is closest to the building, that is, when the car 21 is stopped at a position facing the building door of the boarding / exiting portion provided in the building. It is provided at a position closest to the building door. Of the first to third car door portions 24a to 24c, the position where the third car door portion 24c is farthest from the building, that is, the position where the car 21 is farthest from the building door when the car 21 is at the position facing the building door. Is provided.

  The first to third door hangers 26 a to 26 c are provided so as to be movable along the width direction of the opening of the car 21, that is, the opening / closing direction X. When the first to third door hangers 26a to 26c move in the opening / closing direction X, the first to third car door portions 24a to 24c fixed to them move in the opening direction X. Hereinafter, when the first to third door hangers 26a to 26c are collectively referred to, they may be simply referred to as the door hangers 26.

  The first to third guide rail portions 27a, 27b, and 27c are provided on the car body 22 and guide the door hanger 26, respectively. The first to third guide rail portions 27 a to 27 c are provided at the upper end portion of the car body 22 and extend in the width direction of the opening formed in the car body 22, that is, along the opening / closing direction X of the car door 24. The 1st-3rd guide rail parts 27a-27c are provided in the depth direction Y at intervals. Attachment members 39 are attached to both ends in the opening / closing direction X of the first to third guide rail portions 27a to 27c, and the attachment members 39 are fixed to rail attachment portions 23a extending downward from the upper frame 23 of the car body 22. Provided. The first to third guide rail portions 27a to 27c may be collectively referred to as the guide rail portion 27 in some cases.

  The rotational drive source 31 is fixed to the upper portion of the car body 22, that is, the upper portion of the upper frame 23 by a drive source bracket 32. The rotational drive source 31 has an output shaft 33. The rotational drive source 31 is realized by a DC motor that is an electric motor, for example. The rotation drive source 31 is driven based on a command from a control unit 34 that controls the operation of an elevator including the car 21. The control unit 34 is realized by a microcomputer or the like. When the rotational drive source 31 is driven, the output shaft 33 of the rotational drive source 31 rotates around the rotational axis L1. The rotational force of the rotational drive source 31 is transmitted to the car door 24 via the first to third power transmission means 36a to 36c.

  The first power transmission means 36 a includes a first sprocket wheel 29 a that is coaxially fixed to the output shaft 33 of the rotational drive source 31, and an end portion 23 a in the closing direction X2 of the upper frame 23 of the car body 22. A second sprocket wheel 29b rotatably provided on the first bracket 40a fixed to the lower surface and an end 23b in the opening direction X1 of the upper frame 23 of the car body 22 are fixed to the lower surface of the upper frame 23. Two brackets, a third sprocket wheel 29c, which is rotatably provided, and a second sprocket wheel 29b, which is close to the first bracket 40a at the end 23a in the closing direction X2 of the upper frame 23 of the car body 22. A freely mounted fourth sprocket wheel 29d and first to fourth sprocket wheels 29a to 29d are wound around. Is it configured to include a first chain 28a being stretched. The fourth sprocket wheel 29d is provided in the opening direction X1 of the second sprocket wheel 29b.

  The rotation axes of the first to fourth sprocket wheels 29a to 29b are parallel to each other. Further, the center in the extending direction of each rotation axis of the first to fourth sprocket wheels 29a to 29b is provided on a virtual plane perpendicular to each rotation axis. One end of the first chain 28a is locked to a first locking piece 30a fixed to the upper end of the first car hanger 26a, and the other end is passed through first to fourth sprocket wheels 29a to 29d. Is coupled to the first locking piece 30a. The first chain 28a is reversed from one end locked to the first locking piece 30a via the second sprocket wheel 29b, wound around the first sprocket wheel 29a, and rotated by the fourth sprocket wheel 29d. After the direction is changed toward the third sprocket wheel 29c, it is wound around the third sprocket wheel and reversed, and the other end portion is stretched while being locked to the first locking piece 30a. The rotational force of 31 is transmitted as a horizontal force for moving the first car door portion 24a fixed to the first door hanger 26a in the opening / closing direction X.

  The second power transmission means 36b includes a fifth sprocket wheel rotatably supported by a bracket fixed to the lower surface of the upper frame 23 of the car body 22, and a sixth sprocket fixed coaxially to the third sprocket wheel 29c. The wheel includes a second chain 28b that is wound around and stretched between the fifth and sixth sprocket wheels. The rotation axes of the fifth and sixth sprocket wheels are parallel to each other. The center in the extending direction of the respective rotation axes of the fifth and sixth sprocket wheels is provided on a virtual plane perpendicular to the respective rotation axes.

  The sixth sprocket wheel is rotationally driven in conjunction with the third sprocket wheel 29c, and the power is transmitted to the fifth sprocket wheel by the second chain 28b. One end portion of the second chain 28b is locked to a second locking piece 30b fixed to the upper end portion of the second door hanger 26b, is wound around a fifth sprocket wheel, is inverted, The upper sprocket spans between the six sprocket wheels, passes through the sixth sprocket wheel and reverses, and the other end is locked to the second locking piece 30b. Therefore, the driving force from the rotational drive source 31 is transmitted to the sixth sprocket wheel via the first power transmission means 36a, and the second car door portion 24b fixed to the second door hanger 26b by the second chain 28b. It is transmitted as a horizontal force that moves in the opening / closing direction X.

  The third power transmission means 36c includes a seventh sprocket wheel fixed coaxially to the fifth sprocket wheel, an eighth sprocket wheel fixed coaxially to the third sprocket wheel 29c, and the seventh and eighth sprocket wheels. And a third chain 28c that is wound around and stretched. The rotation axes of the seventh and eighth sprocket wheels are parallel to each other. The center in the extending direction of each rotation axis of the seventh and eighth sprocket wheels is provided on a virtual plane that is perpendicular to each rotation axis.

  The seventh sprocket wheel is rotationally driven in conjunction with the fifth sprocket wheel, and the eighth sprocket wheel is rotationally driven in conjunction with the third sprocket wheel 29c, and the power is given to the third chain 28c. One end of the third chain 28c is locked to a third locking piece 30c fixed to the upper end of the third door hanger 26c, and is wound around a seventh sprocket wheel to be inverted, After passing through the upper stretched portion stretched between the eight sprocket wheels, it is wound around the eighth sprocket wheel and reversed, and the other end is locked to the third locking piece 30c. Accordingly, the driving force from the rotational drive source 31 is transmitted to the seventh and eighth sprocket wheels via the first and second power transmission means 36a and 36b, and the third door hanger 26c is opened and closed by the third chain 28c. It is transmitted as a horizontal force that moves to X. The outer diameters of the seventh and eighth sprocket wheels are formed smaller than the outer diameters of the third sprocket wheel 29e and the fifth sprocket wheel, which are fixed coaxially.

  Thus, power is transmitted to the first car door portion 24a by the first power transmission means 36a, and the power from the first power transmission means 36a is transmitted to the second and third power transmission means 36b and 36c, respectively. Power is transmitted to the second and third car door portions 24b and 24c by the second and third power transmission means 36b and 36c, respectively. As described above, since the power is individually transmitted to the first to third car door portions 24a and 24c by the first to third power transmission means 36a, 36b and 36c, the first to third car door portions 24a and 24c are always connected. The car door 24 can be opened and closed in conjunction with each other.

  The first to third locking pieces 30a to 30c have different positions in the height direction Z, that is, the moving direction of the car 21, in order to avoid interference of the first to third chains 28a to 28c. It is fixed to the three-door hangers 26a to 26c, and both ends of the chains 28a to 28c are respectively locked thereto. A second sprocket wheel 29b is provided closer to the closing direction X2 than the first locking piece 30a, a fifth sprocket wheel is provided closer to the closing direction X2 than the second locking piece 30b, and a third locking piece 30c. A seventh sprocket wheel is provided closer to the closing direction X2. Thereby, the displacement to the closing direction X2 of the 1st-3rd latching pieces 30a-30c is accept | permitted. The third, sixth and eighth sprocket wheels are provided at the end in the opening direction X1 in order to allow all displacements of the first to third locking pieces 30a to 30c.

  The output shaft 33 of the rotation drive source 31 extends in the direction Y perpendicular to the opening / closing direction X and the height direction Z, and protrudes from the drive source body 35 of the rotation drive source 31 to the hoistway side. A direction Y perpendicular to the opening / closing direction X and the height direction Z may be referred to as a depth direction Y. A first sprocket wheel 29a is fixed to the output shaft 33. Therefore, by rotating the output shaft 33 about the rotation axis L1 in the rotation direction corresponding to the opening / closing direction X of the car door 24, the first sprocket wheel 29a rotates about the rotation axis L1, and the first to third chains. The car door 24 can be opened and closed via 28a to 28c.

  A protruding piece 47 is fixed to the first door hanger 26a. The protruding piece 47 protrudes in the depth direction Y from the car body 23. The protruding piece 47 is connected to a connecting portion connected to the building door when the car 21 faces the building door of the building and stops at each floor. Thus, when the car door 24 is moved in the opening / closing direction, a force for moving in the opening / closing direction from the car door 24 to the building door is transmitted via the protruding piece 47, and the building door can be opened and closed in conjunction with the car door 24. it can.

  The car body 22 is provided with a closed state detection switch 37 for detecting the closed state of the car door 24. The closed state detection switch 37 is provided at the upper end of the car body 22. The closed state detection switch 37 has a switch piece 37a. The first door hanger 26a is provided with a contact piece 38 that contacts the switch piece 37a when the car door 24 is in the closed position. When the car door 24 is in the closed position, the end surface of the first car door portion 24a in the closing direction X2 contacts the frame body 22a of the car body 22. When the contact piece 38 comes into contact with the switch piece 37a, the switching mode of the closed state detection switch 37 changes, and the control unit 34 determines whether the car door 24 is in the closed state based on the change of the switching mode. The control unit 34 is given a detection result from an operation detection means (not shown) for detecting whether or not the car 21 is moving up and down.

  When the controller 34 determines that the car door 24 is in the closed state and determines that the car 21 is moving up and down, the control device 34 locks the car door 24 in the closed position by the lock device 20.

  The lock device 20 is provided in the rotational drive source 31. The locking device 20 includes a rotating body 41 coupled to the first sprocket wheel 29a and an engaging means 42. The rotating body 41 is fixed coaxially with the first sprocket wheel 29a. The rotating body 41 is provided on the output shaft 33. The engaging means 42 is provided so that the rotating body 41 can be engaged.

  FIG. 3 is a perspective view showing the car door locking device 20 of the elevator. FIG. 4 is a cross-sectional view taken along section line IV-IV in FIG. In FIG. 4, for ease of illustration, the third and fifth to eighth sprocket wheels 29c and 29e to 29h, the second and third chains 29b and 29c, the second and third brackets, and the car door 24 are shown. It is omitted.

  As described above, the lock device 20 includes the rotating body 41 and the engaging means 42. The rotating body 41 is provided coaxially with the rotation axis L1 of the first sprocket wheel 29a, and is fixed to the output shaft 33 of the rotation drive source 31. The rotating body 41 has an engaging portion 43 that protrudes outward in the radial direction from the outer periphery 42 of the first sprocket wheel 29a with respect to the rotation axis L1.

  The rotating body 41 is formed by a disk body in which a plurality of insertion holes 45 are formed on the outer peripheral portion 44 in the radial direction at intervals in the circumferential direction around the rotation axis L1. Each insertion hole 45 penetrates the rotating body 41 in the thickness direction of the rotating body 41, that is, in the direction along the rotation axis L1. The rotating body 41 is formed using a steel plate, and the thickness is selected from 1.2 mm to 1.5 mm.

  The diameter of the rotating body 41 is selected to be larger than the diameter of the first sprocket wheel 29a. The insertion hole 45 is formed outward of the outer periphery 42 of the first sprocket wheel 29a in the radial direction with respect to the rotation axis L1. In the present embodiment, the insertion hole 45 is formed outward in the radial direction with respect to the rotation axis L1 from the portion of the outer periphery 42 of the first sprocket wheel 29a that is farthest from the rotation axis L1. An engaging portion 43 is formed by a portion of the rotating body 41 between the insertion holes 45 adjacent to each other. The length of the engagement portion 43 in the circumferential direction, that is, the length W1 of the portion sandwiched between the insertion holes 45 adjacent to each other in the circumferential direction is determined when the engagement piece 61 described later comes into contact. The joint portion 43 is selected so as not to break. The length W1 is selected from 2.5 mm to 8 mm.

  Moreover, the inner diameter W2 of the inner peripheral surface facing the insertion hole 25 is selected to be about 1.5 to 2 times the outer diameter W5 of the engagement piece 61 described later. The inner diameter W2 is selected to be about 15 mm, for example.

  The output shaft 33 is provided with a first sprocket wheel 29a, a stopper 51, a rotating body 41, and a fixing member 52 in this order from the drive source body 35 side of the rotation drive source 31. The first sprocket wheel 29a, the stopper 51, the rotating body 41, and the fixing member 52 are formed using a metal material such as iron. The output shaft 33 has a substantially cylindrical shape. The first sprocket wheel 29a, the stopper 51, and the rotating body 41 are each formed with a fitting hole into which the output shaft 33 is fitted, and the output shaft 33 is fitted into the fitting hole. The output shaft 33 is provided with a restricting portion 55 that abuts the first sprocket wheel 29a and restricts the movement of the first sprocket wheel 29a toward the drive source body 35. The first sprocket wheel 29a is provided in contact with the restricting portion 55, and is provided on the output shaft 33 with a predetermined interval from the drive portion main body 35 in the direction along the rotation axis L1.

  The stopper 51 has a cylindrical shape. The outer diameter of the stopper 51 is selected to be smaller than the outer diameter of the first sprocket wheel 29a. One end 51a of the stopper 51 in the direction along the rotation axis L1 is in contact with the side surface of the rotating body 41, and the other end 51b is in contact with the side surface of the first sprocket wheel 29a. The stopper 51 is formed in a predetermined length W3 in the direction along the rotation axis L1. The predetermined length W3 is selected so that the chain 26 wound around the first sprocket wheel 29a does not contact the rotating body 41.

  The fixing member 52 is in contact with the side surface of the rotating body 41 so that the first sprocket wheel 29a, the stopper 51, and the rotating body 41 fitted to the output shaft 33 are not detached from the output shaft 33. The first sprocket wheel 29 a, the stopper 51, and the rotating body 41 are sandwiched between and fixed to the output shaft 33. The fixing member 52 has a cylindrical shape and is fixed to the output shaft 33.

  The output shaft 33 is formed with a rotation axis keyway 53 extending along the rotation axis L1. In addition, key grooves are formed at positions facing the rotation shaft key groove 53 on the inner peripheral surface portion facing the output shaft 33 of the first sprocket wheel 29a, the stopper 51, the rotating body 41, and the fixing member 52, respectively. A key 54 is inserted into the rotary shaft keyway 53 and the keyway formed in the first sprocket wheel 29a, the stopper 51, the rotating body 41 and the fixed member 52, and the output shaft 33, the first sprocket wheel 29a, the stopper. 51, the rotating body 41, and the fixed member 52 are prevented from rotating about the rotation axis L1. Accordingly, the first sprocket wheel 29a and the rotating body 41 can be rotated in conjunction with each other.

  The engaging means 42 includes an engaging piece 61 and an electromagnetic solenoid 62 that is an actuator. The engagement piece 61 is provided to be displaceable over an insertion position where it is inserted on the movement path of the engagement portion 43 and a disengagement position where it is detached from the movement path of the engagement portion 43.

  An engagement means bracket 63 is fixed to the drive source bracket 32. The drive source bracket 32 has an L-shaped cross-section in the opening direction X, and a frame fixing portion 32a fixed to the upper frame 23 with bolts and nuts, and an end of the frame fixing portion 32a in the depth direction Y. Drive source mounting part 32b rising upward from the part. A side surface portion from which the output shaft 33 of the drive source main body 35 protrudes contacts the drive source mounting portion 32b, and the drive source main body 35 is fixed to the drive source mounting portion 32b by bolts and nuts. The engagement means bracket 63 has an L-shaped cross section in the opening direction X, and is engaged with the engagement means attachment portion 63a fixed to the drive source attachment portion 32b by bolts and nuts, and the depth from the upper end of the fixation portion 63. And a mounting portion mounting portion 63b extending in the other direction Y.

  A mounting portion 64 on which the engagement piece 61 and the electromagnetic solenoid 62 are mounted is fixed to the mounting portion mounting portion 63b by bolts and nuts.

  The mounting portion 64 has a mounting portion 65 extending in parallel with the direction along the rotation axis L1 and the opening / closing direction X. The mounting portion 64 extends above the stopper 51 and is separated from the first sprocket wheel 29a. An engagement piece support portion 95 that supports the engagement piece 61 so as to be movable in the direction along the rotation axis L <b> 1 is provided at an end portion of the mounting portion 64 that is close to the rotating body 41. The engagement piece support portion 95 supports the engagement piece 61 near the upper portion of the first sprocket wheel 29a. The engagement piece support portion 95 includes first and second rising portions 66 and 67 that rise upward from one end portion of the placement portion 65 in the direction along the rotation axis L1. The first and second rising portions 66 and 67 are provided at a predetermined interval along the rotation axis L1. The first and second rising portions 66 and 67 are realized by a plate-like member whose thickness direction is parallel to the direction along the rotation axis L1. In the first and second rising portions 66 and 67, first and second support insertion holes 68 and 69 penetrating in the direction along the rotation axis L1 are formed in the center in the opening / closing direction Z and the height direction Z, respectively. . The engagement piece 61 is inserted and held in the first and second support insertion holes 68 and 69. The engagement piece 61 has a substantially cylindrical shape, and the inner peripheral surfaces of the first and second rising portions 66 and 67 facing the first and second support insertion holes 68 and 69 are respectively formed in a cylindrical shape. . The inner diameters of the first and second rising portions 66 and 67 facing the first and second support insertion holes 68 and 69 are selected to be slightly larger than the outer diameter of the engagement piece 61. The outer diameter of the engagement piece 61 is selected to be about 6 mm, for example. The engagement piece 61 is formed using a metal material such as iron. The length of the engagement piece 61 in the direction along the rotation axis L1 is formed larger than the distance between the first and second rising portions 66 and 67 in the direction along the rotation axis L1. The first rising portion 66 is provided on one side of the second rising portion 67 in the direction along the rotation axis L1.

  A compression coil spring 71 is fitted into an intermediate portion 70 sandwiched between the first and second rising portions 66 and 67 in the engagement piece 61. The outer diameter of the compression coil spring 71 is selected to be larger than the inner diameter of the inner peripheral surface facing the first and second support insertion holes 68 and 69. The intermediate portion 70 is provided with a connecting portion 72 that is connected to the other end of the compression coil spring 71 in the direction along the rotation axis L1. The outer diameter of the connecting portion 72 is selected to be larger than the inner diameter of the inner peripheral surface facing the first and second support insertion holes 68 and 69, whereby the engagement piece 61 is made to be in the first and second support insertion holes 68 and 69. It is prevented that it comes off from.

  The engagement piece 61 is biased to the other side along the rotation axis L1 by the compression coil spring 71, whereby the engagement piece 61 can be displaced to the other side along the rotation axis L1. When the engagement piece 61 is urged by the compression coil spring 71 in the other direction along the rotation axis L <b> 1 and the connecting portion 72 contacts the second rising portion 67, the rotation axis of the engagement piece 61 can be moved. Movement to the other side in the direction along L1 is restricted. The position where the movement of the engagement piece 61 in the direction along the rotation axis L1 is restricted is the separation position. When the engagement piece 61 is displaced to the disengagement position, the engagement piece 61 is disengaged from the moving path of the engagement portion 43. That is, when the engagement piece 61 is displaced to the disengagement position, the one end portion 61a in the direction along the rotation axis L1 of the engagement piece 61 is disengaged from the moving path of the engagement portion 43.

  An engagement piece stopper portion 74 formed of a rib is provided on the other end portion 61b which is the other side in the direction along the rotation axis L1 than the portion supported by the second rising portion 67 of the engagement piece 61. The outer diameter of the engagement piece stopper 74 is formed larger than the inner diameter of the inner peripheral surface facing the second support insertion hole 69 of the second rising portion 67. An engagement piece interference member 75 is provided between the engagement piece stopper portion 74 and the second rising portion 67. The engagement piece interference member 75 has an annular shape and is provided by being inserted into the engagement piece 61. The piece interference member 75 is realized by a rubber washer. The inner diameter of the engagement piece interference member 75 is selected to be smaller than the outer diameter of the engagement piece stopper portion 74, and the outer diameter is larger than the inner diameter of the inner peripheral surface facing the second support insertion hole 69 of the second rising portion 67. Largely chosen. By providing the engagement interference member 75, when the engagement piece 61 is displaced in one of the directions along the rotation axis L1 and the engagement piece 61 is moved to the insertion position, the engagement piece 61 is engaged with the second rising portion 67. The contact with the one stopper part 74 can be prevented and the impact given to both can be suppressed.

  When the engagement interference member 75 comes into contact with the second rising portion 68, the movement of the engagement piece 61 in one direction along the rotation axis L1 is restricted. The position where the movement of the engagement piece 61 in one direction along the rotation axis L1 is restricted is the insertion position. When the engagement piece 61 is displaced to the insertion position, the engagement piece 61 is inserted on the movement path of the engagement portion 43. That is, when the engagement piece 61 is displaced to the insertion position, the one end portion 61 a in the direction along the rotation axis L <b> 1 of the engagement piece 61 is inserted on the movement path of the engagement portion 43.

  When the engagement piece 61 displaces the insertion position and the separation position, the displacement amount in the direction along the rotation axis L1 is smaller than the maximum displacement amount of the compression coil spring 71. The distance in the direction along the rotational axis L1 with 75 is selected. This prevents the compression coil spring 71 from being damaged.

  The electromagnetic solenoid 62 is provided in the vicinity of the other end 61b of the engagement piece 61 in the direction along the rotation axis L1. The electromagnetic solenoid 62 has an electromagnetic solenoid main body 73 and an operating piece 80. The electromagnetic solenoid 62 is mounted on the mounting surface 65 of the mounting unit 64 and is fixed to the mounting unit 64. The electromagnetic solenoid 62 displaces the operating piece 80 according to the supply of electric power. The moving direction of the operating piece 80 is provided in parallel to the direction in which the rotation axis L1 extends. The operating piece 80 is provided coaxially with the engaging piece 61 and is provided so as to be able to contact the other end portion 61 b of the engaging piece 61. When the supply of electric power is stopped, the electromagnetic solenoid 62 retracts and holds the operating piece 80 in the other direction along the rotation axis L1, and when the electric power is supplied, the operating piece 80 is moved along the rotation axis L1. Move to one side and hold. The operating piece 80 is provided through the electromagnetic solenoid body 73 and protrudes outward from one end and the other end of the electromagnetic solenoid body 73 in the direction along the rotation axis L1.

  An operation piece interference member 81 is provided on the other side of the operation piece 80 in the direction along the rotation axis L1. A wall portion 82 that rises upward is provided at the other end portion of the mounting portion 64 in the depth direction Y, and the operating piece interference member 81 is fixed to the wall portion 82. The operating piece interference member 81 is attached to the wall portion 82 by attachment bolts 83. The mounting bolt 83 passes through the wall portion 82 in the direction along the rotation axis L1, passes through the remaining portion of the operating piece interference member 81 except for the portion where the operating piece 80 abuts, and the bolt is screwed to the end portion. The operating piece interference member 81 is fixed to the wall portion 82. The mounting bolt 83 is screwed to the wall portion 82, and the operating piece interference member 81 is moved in the direction approaching or moving away from the electromagnetic solenoid body 73 by moving the mounting bolt 83 forward or backward, thereby moving the operating piece 80. And the interference position where the operating piece interference member 81 interferes can be adjusted. The operating piece interference member 81 is made of rubber, for example.

  When the supply of electric power is stopped, the operating piece 80 abuts against the operating piece interference member 81, thereby preventing the displacement of the operating piece 80 in the direction along the axial direction L1. By providing the operating piece interference member 81, contact between the operating piece 80 and the wall 83 is prevented, an impact applied to both is suppressed, and the operating piece 62 and the electromagnetic solenoid are moved when the operating piece 62 moves. It is possible to prevent contact noise generated by contact with the main body 73 and suppress generation of noise.

  The engaging portion 43 is provided to be separated from the rotation axis L1 by a predetermined distance R1 in the radial direction with respect to the rotation axis L1. The first sprocket wheel 29a has a predetermined radius R2 around the rotation axis L1. The predetermined radius R2 is the maximum radius of the first sprocket wheel 29a. The predetermined distance R1 is selected to be larger than the radius R2, preferably the predetermined distance R1 is selected to be 1.5 times or more and less than 3 times the radius R2, and more preferably, the predetermined distance R1 is , About twice the radius R2. When the car door 24 moves in the opening / closing direction X, a rotational torque is generated in the first sprocket wheel 29a through at least the first chain 28a as the car door 24 moves. When the engaging piece 61 is inserted into the insertion position, that is, when the engaging piece 61 is inserted through the insertion hole 25, the rotational torque applied to the first sprocket wheel 29a is applied to the engaging piece 61 via the rotating body 41. Given. Since the rotational torque is expressed by the product of the distance and the force, the engagement piece 61 is engaged when the engagement piece 61 comes into contact with the engagement portion 43 by selecting the predetermined distance R1 as described above. The force applied from the joint portion 43 can be made smaller than the force applied when the engagement piece 61 is brought into direct contact with the car door 24. Therefore, the load applied to the engagement piece 61 and the engagement portion 43 with the movement of the car door 24 in the opening / closing direction X is reduced, thereby preventing the engagement piece 61 and the engagement portion 43 from being damaged, The car door 24 can be securely locked. Further, by selecting the predetermined distance R1 as described above, the rotating body 41 is increased in size, and accordingly, the locking device 20 is suppressed from increasing in size. Further, when the rotary body 41 is enlarged, when the rotary drive source 31 rotates the output shaft 33, the load received by the rotary drive source 31 due to the inertia of the rotary body 41 increases, and the rotary body 41 bends in the thickness direction. Since it is necessary to increase the thickness of the rotating body 41 so that the inertia of the rotating body 41 is further increased, the responsiveness of opening and closing the car door 24 is deteriorated. By selecting L1, the influence of the inertia of the rotating body 41 can be reduced, and the load applied to the locking piece 61 can be reduced.

  5 and 6 are side views for illustrating the operation of the car door locking device 20 of the elevator. FIG. 7 is a front view showing the car 21 as seen from the hoistway side. When power is not supplied to the electromagnetic solenoid 62, as shown in FIG. 5, the operating piece 80 is held with the other end portion 80b in the direction along the rotation axis L1 in contact with the operating piece interference member 81. The engagement piece 61 is biased by the compression coil spring 71 and is held at the disengaged position. At this time, the operating piece 80 and the engaging piece 61 are slightly separated in the extending direction of the rotation axis L1.

  When the engagement piece 61 is in the disengagement position, the one end 61a of the engagement piece 61 in the direction along the rotation axis L1 and the rotating body 41 are separated by a predetermined distance W3 in the direction along the rotation axis L1. The predetermined distance W3 is selected from 0.5 mm to 1 mm. In a state where the engagement piece 61 is held at the disengaged position, the output shaft 33 of the rotation drive source 53 can be rotated around the rotation axis L1, so that the first sprocket wheel 29a is rotated to pass through the first chain 28a. Thus, the car door 24 can be moved in the opening direction X1 and the closing direction X2 shown in FIG. 7 according to the rotation direction of the output shaft 33.

  When power is supplied to the electromagnetic solenoid 62, as shown in FIG. 6, the operating piece 80 has one end 80a in the direction along the rotation axis L1 in contact with the engaging piece 61, and the engaging piece interference member 75 is The second rising portion 67 is held in contact with the second rising portion 67. The pressing force of the electromagnetic solenoid 62 on one side of the operation piece 80 along the rotation axis L1 is selected to be larger than the spring force that the compression coil spring 71 urges the engagement piece 61 toward the other side along the rotation axis L1. It is. Thus, when electric power is supplied to the electromagnetic solenoid 62, the electromagnetic solenoid 62 presses and displaces the operating piece 80 against the spring force of the compression coil spring 71, and displaces the engaging piece 61 from the disengagement position to the insertion position. Can be made. When power is supplied to the electromagnetic solenoid 62, the operating piece 80 continues to press the engaging piece 61, and the movement of the engaging piece 61 is performed at a position where the engaging piece interference member 75 contacts the second rising portion 67. The engagement piece 61 is held at the insertion position.

  As shown in FIG. 7, when the car door 24 is in the closed position, one of the plurality of insertion holes 25 formed in the rotating body 41 is provided facing the engagement piece 61 and supplies power to the electromagnetic solenoid 62. When the engagement piece 61 is moved in one direction along the rotation axis L1, the one end 61a of the engagement piece 61 in the direction along the rotation axis L1 is brought into the insertion position without contacting the rotating body 41. Displace. When the engagement piece 61 is displaced to the insertion position, the engagement piece 61 is inserted through the insertion hole 25 as shown in FIG. When the engagement piece 61 is provided at the insertion position, the one end 61a in the direction along the rotation axis L1 of the engagement piece 61 is one of the directions along the rotation axis L1 of the rotating body 41 in the direction along the rotation axis L1. The predetermined distance W4 protrudes. The predetermined distance W4 is selected from 0.5 mm to 1 mm. When the output shaft 33 of the rotation drive source 53 is rotated around the rotation axis L1 in a state where the engagement piece 61 is held at the insertion position, the locking portion 43 is displaced around the rotation axis L1, and the engagement piece 61 and When the locking portion 43 abuts and is locked, the movement of the car door 24 connected via the first sprocket wheel 29a and the chain 28 in the opening / closing direction X is restricted, that is, the car door 24 is Can be locked.

  The control unit 37 supplies power to the electromagnetic solenoid 62 when the car door 24 is in a closed state and when the car 21 is raised or lowered, that is, when the car 21 is moving up and down the hoistway. As a result, the engagement piece 61 is held at the insertion position, so that the rotation of the rotating body 41 is locked, and the car door 24 is prevented from being undesirably opened during the lifting / lowering operation. Further, the control unit 37 stops the supply of electric power to the electromagnetic solenoid 62 when the car door 24 is not in the closed state and when the car 21 is stopped. As a result, the engagement piece 61 is held at the disengagement position, so that the rotating body 41 can be rotated around the rotation axis L1. Therefore, since the rotation drive source 53 can rotate the output shaft 33, the first sprocket wheel 29a is rotated around the rotation axis L1 and the first chain 28a is passed through the first chain 28a according to the rotation direction of the output shaft 33. The car door 24 can be moved in the opening direction X1 and the closing direction X2 shown in FIG.

  As described above, in the locking device 20, since the rotating body 41 is connected to the first sprocket wheel 29a, the rotation of the first sprocket wheel 29a around the rotation axis L1 rotates around the rotation axis L1. Since the engaging portion 43 of the rotating body 41 protrudes outward in the radial direction from the outer periphery 42 of the first sprocket wheel 29a with respect to the rotation axis L1 of the first sprocket wheel 29a, the engaging portion 43 includes the first sprocket wheel. It moves with a larger locus in the radial direction than the outer periphery 42 of the first sprocket wheel 29a around the rotation axis L1 of 29a. That is, the movement path of the engaging portion 43 is farther away from the rotation axis L1 in the radial direction than the movement path of the outer periphery 42 of the first sprocket wheel 29a.

  When the engaging means 42 displaces the engaging piece 61 to the insertion position inserted on the moving path of the engaging portion 43, the engaging piece 61 and the engaging portion 43 come into contact with each other and engage with each other. 61 is locked to prevent rotational displacement of the first sprocket wheel 29a. As a result, the rotation of the first sprocket wheel 29a connected to the engagement piece 61 can be prevented and locked. A chain 28 is wound around the first sprocket wheel 29a, and the chain 28 is connected to the car door 24. The car door 24 is opened and closed around the rotation axis L1 in a rotation direction corresponding to the opening / closing direction X of the car door 24. Therefore, when the rotation of the first sprocket wheel 29a is locked, the opening / closing direction X of the car door 24 connected to the first sprocket wheel 29a via the chain 28 is performed. The car door 24 can be locked.

  When the car door 24 moves in the opening / closing direction X, torque is generated in the first sprocket wheel 29a via the chain 28 as the car door 24 moves. When the engagement piece 61 is provided at the insertion position, the engagement piece 61 engages with the engagement portion 43 radially outward from the outer periphery 42 of the first sprocket wheel 29a with respect to the rotation axis L1. Since the force is expressed by the product, the force applied by the engagement piece 61 from the engagement portion 43 can be made smaller than the force applied when the engagement piece 61 is brought into direct contact with the car door 24. Therefore, the load applied to the engagement piece 61 and the engagement portion 43 with the movement of the car door 24 in the opening / closing direction X is reduced, thereby preventing the engagement piece 61 and the engagement portion 43 from being damaged, The car door 24 can be securely locked.

  In addition, since the car door 24 is always connected directly or indirectly to the output shaft 33 of the rotational drive source 31 via a chain, the elevator door having the rotational drive source 31 having the output shaft 33 can be used in this embodiment. The locking device 20 can be applied. The first sprocket wheel 29a for transmitting the rotational force of the rotational drive source 31 to the chain 28 is utilized by providing the first sprocket wheel 29a and the rotating body 41 coaxially on the output shaft 33 of the rotational drive source 31. Since it is not necessary to provide a separate space for installing the winding body and the rotating body, the installation space can be reduced and the installation is facilitated. In particular, in a small elevator such as a home elevator, the locking device is downsized, and the locking device 20 can be suitably applied.

  Even when the movement path of the engaging portion 43 is separated from the rotation axis L1, the engagement means 42 displaces the engagement piece 61 in the direction along the rotation axis L1, so that the apparatus is large in the radial direction with respect to the rotation axis L1. Can be prevented.

  In the plate-like body forming the rotating body 41, a plurality of insertion holes 25 are formed at intervals in the circumferential direction on the outer peripheral portion 44 in the radial direction. Therefore, when the car 21 is assembled, the car door 24 is closed. Since the rotation angle of the rotating body 41 may be adjusted so that any one of the plurality of insertion holes 25 faces the engaging piece 61, the assembly is facilitated.

  In another embodiment of the present invention, the rotary body 41 described above may have a structure in which one insertion hole 25 is formed. The insertion hole 25 is provided facing the engagement piece 61 when the car door 24 is closed. Even with such a configuration, the car door 24 can be locked in the closed position, and the same effect as in the above-described embodiment can be achieved.

  In still another embodiment of the present invention, the locking device 20 may be provided on any one of the second to eighth sprocket wheels 29b to 29h. Even if it is such a structure, the same effect can be achieved.

  In the above-described embodiment, the rotating body 41 is provided on the output shaft 33 of the rotation drive source 31. However, in still another embodiment of the present invention, the rotating body having the engaging portion is used as the first sprocket wheel 29a. The rotating body may have a rod shape, and may be formed by a sprocket, for example. That is, if the rotating body has an engaging portion that protrudes outward in the radial direction from the outer periphery of the first sprocket wheel 29a with respect to the rotation axis L1, the same effect can be achieved.

  In still another embodiment of the present invention, a sprocket wheel is used as the winding body and a chain is used as the rope. However, in the above-described embodiment, the sprocket wheel 28 may be replaced with a pulley. In this case, the chain 28 may be configured in place of the belt. Even if it is such a structure, the same effect can be achieved.

It is a front view which shows a part of cage | basket | car 21 provided with the locking device 20 of the elevator car door of one Embodiment of this invention seeing from the hoistway side. 3 is a plan view showing a part of a car 21. FIG. It is a perspective view which shows the locking device 20 of the car door of an elevator. It is sectional drawing seen from the cut surface line IV-IV of FIG. It is a side view for showing operation of locking device 20 of a car door of an elevator. It is a side view for showing operation of locking device 20 of a car door of an elevator. It is a front view which shows the cage | basket | car 21 seeing from the hoistway side. It is a front view which shows the locking apparatus 1 of the elevator car door of a prior art.

Explanation of symbols

20 Elevator car door locking device 20
24 Car door 28 Chain 29 Sprocket wheel 41 Rotating body 42 Engagement means 43 Engagement part 61 Engagement piece

Claims (5)

An elevator that opens and closes a car door via a rope by rotating a winding body around which a rope connected to the car door is wound around a rotation axis in a rotation direction corresponding to the opening and closing direction of the car door. A car door locking device,
A rotating body connected to the winding body and having an engaging portion protruding outward in the radial direction from the outer periphery of the winding body with respect to the rotation axis;
An elevator car comprising engagement means having an engagement piece that is displaced over an insertion position inserted on a movement path of the engagement portion and a disengagement position removed from the movement path of the engagement portion. Door lock device. A rotation drive source having a rotation shaft and rotating the winding body around the rotation axis to open and close the car door;
2. The elevator car door locking device according to claim 1, wherein the winding body and the rotating body are provided coaxially with the rotating shaft.   The elevator door lock device according to claim 1 or 2, wherein the engaging means displaces the engaging piece in a direction in which the rotation axis extends. The rotating body is formed by a disk body in which a plurality of insertion holes are formed at intervals in the circumferential direction on an outer peripheral portion in a radial direction,
4. The elevator car door lock according to claim 3, wherein when the engaging means displaces the engaging piece to the insertion position, the engaging piece is inserted into one of the plurality of insertion holes. apparatus.   The engagement means holds the engagement piece in the insertion position when electric power is supplied, and holds the engagement piece in the disengagement position when electric power is not supplied. 4. The elevator car door locking device according to any one of 4 above.

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