JP2009203068A - Elevator car position holding device - Google Patents

Abstract

An object of the present invention is to hold a car at a position on a landing floor even when a braking force of a hoisting machine brake is reduced while using a space under a car doorway or a landing doorway. is there.
The landing sill 4 is provided with a stopper engaging portion 4a facing the hoistway. The stopper arm 6 is rotatable and displaceable between an engaging position that protrudes toward the landing and engages with the stopper engaging portion 4a and a retracted position that is retracted to the car 1 side. A car door cam 8 is fixed to an end portion of the car door 2a on the door pocket side. The car-side roller 9 is displaced in the thickness direction of the car door 2a along the car door cam inclined surface 8a when the door opening operation starts and when the door closing operation ends. The transmission member 5 converts the displacement of the car-side roller 9 in the thickness direction of the car door 2a into rotation and transmits it to the stopper arm 6.
[Selection] Figure 2

Description

  The present invention relates to an elevator car position holding device that holds a car position that restricts the raising and lowering of a car that has landed on a landing floor.

  In the conventional elevator safety device, when the hoisting machine brake is operated and the car door is opened, the main rope is gripped by the rope gripping device when the speed of the car is equal to or higher than the predetermined value. Ascent and descent is prevented (see, for example, Patent Document 1).

  In addition, in a conventional elevator sill, the closing plate is projected to the landing side in conjunction with the opening operation of the car door, and the gap between the car sill and the landing sill is closed by the closing plate (for example, patent Reference 2).

JP-A-9-212285 Japanese Utility Model Publication No. 5-32374

  However, in the conventional safety device as disclosed in Patent Document 1, it is necessary to secure a space for installing the rope gripping device in the middle of the route of the main rope, which may not be applicable to an existing elevator. It was. Moreover, in the conventional sill as shown in Patent Document 2, the closing plate simply blocks the space between the car sill and the landing sill, and the raising and lowering of the car remains permitted. For this reason, when the braking force of the hoisting machine brake is reduced due to wear of the brake lining or the like, the car cannot be kept stationary. Further, even if the closing plate is engaged with the landing side, the closing plate is gradually displaced along with the opening / closing operation of the car door, so that there is a possibility that the car is displaced before being engaged with the landing side. .

  The present invention has been made to solve the above-described problems, and uses the space under the car doorway and the landing doorway, and even when the braking force of the hoisting machine brake is lowered, It is an object of the present invention to provide an elevator car position holding device that can be held at a floor position.

  The elevator car position holding device according to the present invention is an engaging member provided at a lower part of a landing, provided with a stopper engaging part facing the hoistway, provided at a lower part of the car, and protruding toward the landing side to stop. Stopper and stopper that can be displaced between an engagement position that engages with the engaging portion and a retracted position that is retracted toward the car, and that restricts the raising and lowering of the car by engaging with the stopper engaging portion. A car door cam, which is provided at an end portion of the car door and is inclined in the thickness direction of the car door, and is engaged with the car door cam. Are connected in the thickness direction of the car door along the car door cam inclined surface, and are connected between the car door cam engaging member and the stopper, and the displacement of the car door cam engaging member is stopped by the stopper. A transmission member for transmitting, and at the start of the door opening operation of the car door, the car door cam engaging member is displaced along the inclined surface of the car door cam, so that the stopper is displaced from the retracted position to the engaging position. At the end of the door closing operation, the car door cam engaging member is displaced along the car door cam inclined surface, whereby the stopper is displaced from the engaging position to the retracted position.

  In the elevator car position holding device according to the present invention, the car door cam is provided at the door bag side end of the car door, and the stopper is displaced by the car door cam engaging member and the transmission member that engage with the car door cam. Even when the braking force of the hoisting machine brake is reduced, the car can be held at the landing floor position immediately after the door opening operation starts and immediately before the door closing operation ends. In addition, the space below the car doorway and the landing doorway can be used effectively.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a plan view showing a state of an elevator car position holding device according to Embodiment 1 of the present invention when all the doors are closed, and FIG. 2 is a plan view showing a state when the car position holding device of FIG. 3 is a perspective view showing the main part of FIG. 1, and FIG. 4 is a perspective view showing a state immediately after the start of the door opening operation of FIG.

  In the figure, the car 1 is provided with a car doorway 1a. The car doorway 1a is opened and closed by a pair of car doors 2a and 2b. A car sill 3 that guides the lower ends of the car doors 2a and 2b when the car doors 2a and 2b are opened and closed is fixed to the lower part (floor part) of the car doorway 1a.

  A landing threshold 4 as an engaging member is fixed to the lower part (floor part) of the landing. The landing sill 4 is provided with a stopper engaging portion 4a facing the hoistway. The stopper engaging portion 4a is a groove or a recess that is open on the hoistway side.

  A transmission member 5 is supported on the car sill 3. The transmission member 5 includes a vertical shaft portion 5a penetrating the car sill 3 and a lever portion 5b whose base end portion is fixed to the upper end portion of the shaft portion 5a. Further, the transmission member 5 can rotate around the shaft portion 5a.

  A stopper arm 6 is provided at a lower end portion of the shaft portion 5a as a stopper that restricts the raising / lowering of the car 1 by engaging with the stopper engaging portion 4a. The stopper arm 6 is located below the car 1, that is, below the car sill 3. The stopper arm 6 protrudes toward the landing side and engages with the stopper engaging portion 4a (FIGS. 2 and 4), and a retracted position retracted toward the car 1 (FIGS. 1 and 3). Can be rotated and displaced between the two.

  A spring 7 is provided between the stopper arm 6 and the car 1 as an urging means for urging the stopper arm 6 toward the retracted position. A car door cam 8 is fixed to an end portion of the car door 2a on the door pocket side. The car door cam 8 has a car door cam inclined surface 8a inclined in the thickness direction of the car door 2a (the vertical direction in FIG. 1). The car door cam inclined surface 8a is provided so as to protrude toward the door pocket side from the door pocket side end portion of the car door 2a.

  A car-side roller 9 as a car door cam engaging member is attached to the tip of the lever part 5b. The car-side roller 9 engages with the car door cam 8 and rolls on the car door cam 8 as the car door 2a opens and closes. Further, the car-side roller 9 is displaced in the thickness direction of the car door 2a along the car door cam inclined surface 8a when the door opening operation starts and when the door closing operation ends.

  The transmission member 5 is connected between the car-side roller 9 and the stopper arm 6, and converts the displacement of the car-side roller 9 in the thickness direction of the car door 2 a into rotation and transmits the rotation to the stopper arm 6.

  Next, the operation will be described. When the door opening operation of the car doors 2a and 2b is started, the car-side roller 9 is displaced toward the landing along the car door cam inclined surface 8a. Thereby, the transmission member 5 is rotated clockwise in FIG. 1, and the stopper arm 6 is displaced from the retracted position to the engaged position against the spring 7. Thereafter, the car-side roller 9 is rolled along the surface on the landing side of the car door 2a, and the stopper arm 6 is held in the engaged position even in the fully opened state of FIG. In the state of FIG. 2, since the stopper arm 6 is inserted into the stopper engaging portion 4a, the raising / lowering of the car 1 is restricted.

  Further, at the time of the door closing operation, the car side roller 9 is rolled along the landing side surface of the car door 2a, and the stopper arm 6 is held at the engagement position. However, when the car side roller 9 is moved to the position of the car door cam inclined surface 8a at the end of the door closing operation of the car doors 2a and 2b (just before all doors are closed), the car side roller 9 is moved by the spring force of the spring 7. It is displaced toward the car 1 side along the car door cam inclined surface 8a, and the transmission member 5 is rotated counterclockwise in FIG. At the same time, the stopper arm 6 is displaced from the engaging position to the retracted position, and the car 1 can be raised and lowered.

  In such a car position holding device, the car door cam 8 is provided at the door side end of the car door 2a, and the stopper arm 6 is displaced by the car-side roller 9 and the transmission member 5 that engage with the car door cam 8. Therefore, even when the braking force of the hoisting machine brake is reduced due to wear of the brake lining or the like, the car 1 can be held at the position of the landing floor immediately after the start of the door opening operation until immediately before the end of the door closing operation. . That is, it is possible to more reliably prevent the car 1 from moving while the door is open. Moreover, the space under the car doorway 1a and the landing doorway can be used effectively, and can be easily applied to existing elevators.

Further, while the car 1 is traveling, the stopper arm 6 is held in the retracted position by the spring force of the spring 7, so that the stopper arm 6 does not interfere with the landing threshold 4.
Furthermore, since no consumable parts such as wires are used, maintenance work is not required.

Embodiment 2. FIG.
5 is a plan view showing a state when the elevator car position holding device according to the second embodiment of the present invention is fully closed, and FIG. 6 is a plan view showing a state when the car position holding device of FIG. 5 is fully opened. 7 is a perspective view showing a main part of FIG. 5, and FIG. 8 is a perspective view showing a state immediately after the start of the door opening operation of FIG.

  In this example, the transmission member 5, the stopper arm 6, the car door cam 8, and the car side roller 9 are arranged symmetrically about the width direction center of the car doorway 1a.

  The landing threshold 4 is provided with a stopper engaging portion 4b. The stopper engaging portion 4b is provided continuously over the entire width of the opposing car doorway 1a. At the lower part of the car sill 3, a housing-like movable sill 11 that restricts the raising and lowering of the car 1 by engaging with the stopper engaging portion 4 b is provided. The two stopper arms 6 are accommodated in the movable sill 11.

  The movable sill 11 is provided over the entire width of the car doorway 1a. The movable sill 11 protrudes to the landing side and engages with the stopper engaging portion 4b (FIGS. 6 and 8), and a retracted position retracted to the car 1 side (FIGS. 5 and 7). It is possible to displace between. Guide portions 12 a and 12 b for guiding the displacement of the movable sill 11 are provided on both sides in the width direction of the movable sill 11 below the car 1. The guide portions 12a and 12b are, for example, guide rails or guide grooves.

  Between the movable sill 11 and the car 1, a pair of springs 13 a and 13 b are provided as urging means for urging the movable sill 11 toward the retracted position. The stopper according to the second embodiment has a stopper arm 6 and a movable threshold 11. A roller 6 a that rolls in contact with the inner wall surface of the movable sill 11 is provided at the tip of each stopper arm 6. Other configurations are the same as those in the first embodiment.

  Next, the operation will be described. At the start of the door opening operation of the car doors 2a and 2b, the car side roller 9 is displaced along the car door cam inclined surface 8a to the landing side. Thereby, the transmission member 5 is rotated, and the stopper arm 6 and the movable sill 11 are displaced from the retracted position to the engaged position against the springs 13a and 13b. Thereafter, the car-side roller 9 is rolled along the landing side surface of the car doors 2a and 2b, and the stopper arm 6 and the movable sill 11 are held in the engaged position even in the fully-open state of FIG. In the state of FIG. 6, since the movable threshold 11 is inserted in the stopper engaging part 4b, the raising / lowering of the cage | basket | car 1 is controlled.

  Further, at the time of the door closing operation, the car-side roller 9 is rolled along the landing side surface of the car doors 2a and 2b, and the stopper arm 6 and the movable sill 11 are held at the engagement positions. However, when the car side roller 9 is moved to the position of the car door cam inclined surface 8a at the end of the door closing operation of the car doors 2a and 2b (just before all doors are closed), the car side roller 9 is moved by the spring force of the springs 13a and 13b. 9 is displaced to the car 1 side along the car door cam inclined surface 8a, and the transmission member 5 is rotated. At the same time, the stopper arm 6 and the movable sill 11 are displaced from the engaged position to the retracted position, and the car 1 can be raised and lowered.

  In such a car position holding device, since the movable sill 11 is held at the engagement position from immediately after the door opening operation is started to immediately before the door closing operation is ended, the car 1 can be held at the position of the landing floor. In addition, it is possible to prevent an object from falling into the hoistway from the gap between the car sill 3 and the landing sill 4 or the wheelchair or carriage wheel entering the gap.

Embodiment 3 FIG.
9 is a plan view showing a state when the elevator car position holding device according to Embodiment 3 of the present invention is fully closed, and FIG. 10 is a plan view showing a state when the car position holding device of FIG. 9 is fully opened. FIG. In the figure, the landing entrance 20 is opened and closed by a pair of landing doors 21a and 21b (omitted in the first and second embodiments).

  On both sides of the landing entrance 20 of the landing sill 4, first and second locking devices 22 a and 22 b that lock the movable sill 11 in the engaged position are provided. First and second landing door cam devices 23a, 23b for operating the first and second locking devices 22a, 22b are provided at the door end portions of the landing doors 21a, 21b.

  FIG. 11 is a perspective view of the second locking device 22b and the second landing door cam device 23b of FIG. 9 as seen from the hoistway side, and shows a state during the door opening operation. Further, the first locking device 22a and the first landing door cam device 23a have a symmetric structure with the second locking device 22b and the second landing door cam device 23b, and thus the description thereof is omitted here.

  The second locking device 22b includes a locking member (hook) 24 that locks the movable sill 11 in the engagement position, and first and second landing-side rollers 25 and 26 that roll along the landing door cam device 23b. And a transmission member 27 that transmits the displacement of the landing-side rollers 25 and 26 to the lock member 24. The lock member 24 is rotatable and displaceable between a lock position that locks the movable sill 11 in the engagement position and a release position that unlocks the movable sill 11.

  The second landing door cam device 23b includes a first landing door cam 28 that displaces the first landing side roller 25 in the thickness direction of the landing door 21b when the door opening operation starts, and a second landing side when the door closing operation ends. It has a second landing door cam 29 that displaces the roller 26 in the thickness direction of the landing door 21b.

  The first and second landing door cam devices 23a and 23b displace the lock member 24 between the lock position and the release position in accordance with the opening / closing operation of the landing door 21b. That is, the first landing door cam 28 rotates and displaces the lock member 24 from the release position to the lock position immediately after the door opening operation is started. Further, the second landing door cam 29 pivots and displaces the lock member 24 from the lock position to the release position immediately before the end of the door closing operation.

  FIG. 12 is a perspective view showing car-side components of the car position holding device of FIG. 9 and shows a state immediately after the door opening is started. 13 is a sectional view of the car door 2a and the car door cam 8 shown in FIG. A pair of lock bars 30 with which the lock member 24 engages are fixed to the lower part of the movable sill 11 in the vicinity of both ends in the width direction.

  The car door cam 8 includes a car door cam inclined surface 8a for displacing the car side roller 9 to the landing side immediately after the door opening operation starts, a reverse inclined surface 8b inclined in the opposite direction to the car door cam inclined surface 8a, and a car door cam inclined surface. It has a maximum projecting surface 8c that is located between 8a and the reverse inclined surface 8b and is parallel to the opening / closing direction of the car doors 2a, 2b. Other configurations are the same as those in the second embodiment.

  Next, the operation will be described. When the door opening operation of the car doors 2a and 2b is started, the landing doors 21a and 21b also start the door opening operation in conjunction with the car doors 2a and 2b. Accordingly, the first landing door cam 28 displaces the first landing side roller 25 to the car 1 side, and the lock member 24 is rotated from the release position to the lock position.

  At this time, the movable sill 11 is displaced to the engagement position, and the lock member 24 engages with the lock rod 30. Thereby, the movable sill 11, that is, the stopper is locked in the engagement position. The operation of engaging the lock member 24 with the lock rod 30 is performed when the car-side roller 9 is positioned on the maximum projecting surface 8c.

  Thereafter, when the car-side roller 9 is moved onto the reverse inclined surface 8 b, the restoring force of the springs 13 a and 13 b is supported by the lock member 24 via the movable sill 11 and the lock rod 30. For this reason, the car-side roller 9 is in a state of being lifted from the car door cam 8, that is, in a non-contact state on the side opposite to the maximum door surface 8 c. Therefore, in the door opening operation after the movable sill 11 is locked, the load from the car-side roller 9 is not applied to the car doors 2a and 2b.

  The door closing operation of the car doors 2a and 2b is in the reverse order to the door opening operation. Then, immediately before the end of the door closing operation, the second landing door cam 29 displaces the second landing side roller 26 to the car 1 side, and the transmission member 27 is rotated in the direction opposite to that when the door is opened. Thereby, the engagement of the lock member 24 with the lock rod 30 is released, and the lock member 24 is rotationally displaced to the release position. At this time, the first landing-side roller 25 is also guided by the first landing door cam 28 and returns to the position when all the doors are closed.

In such a car position holding device, by adjusting the positions of the rollers 9, 25, 26 and the cams 8, 28, 29, the movable sill 11 is locked simultaneously with the protrusion using the door opening operation, and the door It is possible to unlock the movable threshold 11 immediately before the closing operation ends.
Further, the load from the car-side roller 9 to the car doors 2a and 2b can be applied only at the end of the door closing operation at the start of the door opening operation, and the car doors 2a and 2b can be opened and closed smoothly. .

The engaging member is not limited to the landing threshold 4.
Further, the car door cam engaging member is not limited to the car-side roller 9 but may be slid along the car door cam, for example.
Further, in the third embodiment, the movable sill 11 is locked at the engagement position by the lock member 24 engaging with the lock rod 30 provided on the movable sill 11. The stopper member 6 may be locked at the engagement position by engaging the lock member 24.

It is a top view which shows the state at the time of all the doors closing of the elevator car position holding | maintenance apparatus by Embodiment 1 of this invention. It is a top view which shows the state at the time of all the door opening of the cage position holding | maintenance apparatus of FIG. It is a perspective view which shows the principal part of FIG. It is a perspective view which shows the state immediately after the door opening operation | movement start of FIG. It is a top view which shows the state at the time of all the doors closing of the elevator car position holding | maintenance apparatus by Embodiment 2 of this invention. It is a top view which shows the state at the time of all the door opening of the cage position holding | maintenance apparatus of FIG. It is a perspective view which shows the principal part of FIG. It is a perspective view which shows the state immediately after the door opening operation | movement start of FIG. It is a top view which shows the state at the time of all the doors closing of the elevator car position holding | maintenance apparatus by Embodiment 3 of this invention. It is a top view which shows the state at the time of all the door opening of the cage position holding | maintenance apparatus of FIG. It is the perspective view which looked at the 2nd locking device and the 2nd hall door cam device of Drawing 9 from the hoistway side. It is a perspective view which shows the cage | basket | car part of the cage position holding | maintenance apparatus of FIG. It is sectional drawing of the car door of FIG. 12, and a car door cam.

Explanation of symbols

  1 car, 4 landing sill (engaging member), 4a, 4b stopper engaging part, 5 transmission member, 6 stopper arm, 7, 13a, 13b spring (biasing means), 8 car door cam, 8a car door cam inclined surface, 9 Car side roller (car door cam engaging member), 11 Movable sill, 24 Lock member, 28 First landing door cam, 29 Second landing door cam.

Claims (3)

An engagement member provided at a lower portion of the landing and provided with a stopper engagement portion facing the hoistway;
Displaceable between an engagement position provided at a lower portion of the car and projecting toward the landing side to engage with the stopper engaging portion and a retracted position retracted toward the car side. A stopper that regulates the raising and lowering of the car by engaging the joint,
A biasing means for biasing the stopper toward the retracted position;
A car door cam having a car door cam inclined surface provided at an end of the car door on the door pocket side and inclined in the thickness direction of the car door;
A car door cam engaging member that engages with the car door cam and is displaced in the thickness direction of the car door along the inclined surface of the car door cam by the movement of the car door; and the car door cam engaging member and the stopper A transmission member connected between the two, and transmitting the displacement of the car door cam engagement member to the stopper,
At the start of the door opening operation of the car door, the car door cam engaging member is displaced along the car door cam inclined surface, whereby the stopper is displaced from the retracted position to the engaging position,
At the end of the door closing operation of the car door, the car door cam engaging member is displaced along the car door cam inclined surface, whereby the stopper is displaced from the engaging position to the retracted position. Elevator car position holding device.   2. The elevator car position holding according to claim 1, wherein the stopper has a movable sill provided at a lower part of the car sill over the entire width of the car entrance and engaged with the stopper engaging portion. apparatus. A locking member provided at the landing and displaceable between a locking position for locking the stopper at the engagement position and a release position for unlocking the stopper; and a landing member provided at the landing door. The elevator car position holding according to claim 1 or 2, further comprising a landing door cam that displaces the lock member between the lock position and the release position in accordance with an opening / closing operation. apparatus.

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