WO2008041332A1 - Elevator system - Google Patents

Abstract

In an elevator system, a step tread which can be displaced from a normal position to a weighting position by weighting is provided in the vicinity of the doorway side fringe on a cage. The step tread displaced to the weighting position is held mechanically thereat by a holding mechanism. Holding of the step tread at the weighting position by the holding mechanism is released by the operation of a release operation section. Displacement state of the step tread is detected by a detection switch. A controller controls the operation of the cage based on the operating state of the detection switch.

Description

 Specification

 Technical field of elevator equipment

 The present invention relates to an elevator apparatus whose operation mode can be switched between an automatic operation mode and a maintenance operation mode.

 Background art

 [0002] In a conventional elevator apparatus, a detection switch such as a piezoelectric mat is installed on the force. When a maintenance person gets on the detection switch, a signal is sent to the elevator controller, and operation of the force is prohibited. In addition, the operation mode is switched to the inspection mode by operating a car inspection switch provided on the heel (see, for example, Patent Document 1).

 Patent Document 1: Japanese Patent Laid-Open No. 11-322214

 Disclosure of the invention

 Problems to be solved by the invention

[0004] In the conventional elevator apparatus as described above, the operation of the car is prohibited only when maintenance personnel are on the detection switch. Therefore, the landing door is closed without operating the force check switch. If maintenance personnel move outside the detection switch installation area on the force cage, the cage will automatically operate with the maintenance personnel still on the cage.

[0005] The present invention has been made to solve the above-described problems, and is an elevator that can more reliably prevent the car from being automatically operated with maintenance personnel on the car. The purpose is to obtain a device.

 Means for solving the problem

[0006] The elevator apparatus according to the present invention is provided in the vicinity of the edge of the car and the entrance / exit side on the car, and is capable of being displaced to a normal position force by a load and to a load position. A holding mechanism that mechanically holds the tread, a release operation part that releases the tread plate from the weighted position, a detection switch that detects the displacement state of the tread, and a force operation based on the operating state of the detection switch The control apparatus which controls is provided.

Brief Description of Drawings FIG. 1 is a perspective view showing a force of an elevator apparatus according to Embodiment 1 of the present invention.

 2 is a circuit diagram showing an example of a circuit configuration of the control device in FIG. 1. FIG.

 FIG. 3 is a perspective view showing a force of an elevator apparatus according to Embodiment 2 of the present invention.

 FIG. 4 is a circuit diagram showing an example of a circuit configuration of a control device for an elevator apparatus according to Embodiment 3 of the present invention.

 BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

 Embodiment 1.

 FIG. 1 is a perspective view showing a car of an elevator apparatus according to Embodiment 1 of the present invention. In the figure, the force cage 1 has a force cage (not shown) suspended in the hoistway and a cab 2 supported by the force cage. A car doorway 2a is provided in front of the force cab 2. The force entrance 2a is opened and closed by a pair of car doors 3. There is a landing entrance 4 at each stop floor. The landing entrance 4 is opened and closed by a pair of landing doors (not shown).

 A step board 5 is provided in the vicinity of the edge of the landing entrance 4 side on the force chamber 2. The counter landing entrance 4 side end (rear end) of the tread board 5 is connected to the upper part of the cab 2 by a plurality of hinges 6. As a result, the tread 5 can be rotated about an axis parallel to the width direction of the force 1.

 A plurality of springs 7 are interposed between the upper surface of the cab 2 and the lower surface of the tread plate 5. When no maintenance staff is on the tread 5, the tread 5 is held in the normal position by the spring 7. When a load is applied by a maintenance person riding on the tread 5, the spring 7 is compressed, and the tread 5 is rotated in a direction in which the end (front end) at the landing entrance 4 is pushed down. Is displaced.

 [0011] The front end surface of the tread plate 5 is provided with a latch 8 that can be moved in and out. A latch engaging member 9 that is engaged with the latch 8 when the tread plate 5 is displaced to the load position is fixed on the cab 2. The holding mechanism 10 includes a latch 8 and a latch engaging member 9, and mechanically holds the tread plate 5 displaced to the load position at the load position.

[0012] In the vicinity of the front end on the tread 5, the holding mechanism 10 releases the holding of the tread 5 to the load position. A release handle 11 is provided as a release operation section. When the release handle 11 is rotated in the direction of arrow A in the figure, the latch 8 retracts toward the tread plate 5 and the engagement of the latch 8 with the latch engaging member 9 is released. As a result, the front end of the tread plate 5 is pushed up by the spring 7, and the tread plate 5 is returned to the normal position.

 [0013] On the car room 2, a detection switch 12 for detecting the displacement state of the tread plate 5 is provided.

 The detection switch 12 is mechanically operated by the tread plate 5 being displaced to the load position. The control device 13 controls the operation of the car 1 based on the operation state of the detection switch 12.

 FIG. 2 is a circuit diagram showing an example of a circuit configuration of the control device 13 of FIG. The detection switch 12 is connected in series to a power switch 14 that switches between enabling and disabling operation. When the tread plate 5 is located at the normal position, the detection switch 12 is connected to the automatic operation side, and when the tread plate 5 is located at the load position, the detection switch 12 is connected to the maintenance operation side.

 [0015] The detection switch 12 is connected in series with an operation mode switching switch 15 for switching the operation mode between the automatic operation mode and the maintenance operation mode. The operation mode switching switch 15 is provided on the force 1 and is operated by a maintenance person on the force 1.

 A normal operation command generation relay 16 is connected to a terminal on the automatic operation side of the operation mode switching switch 15. An UP operation command generation relay 18 and a DOWN operation command generation relay 19 are connected in parallel to the terminal on the maintenance operation side of the operation mode switching switch 15 via the maintenance operation switch 17.

 [0017] As described above, the detection switch 12 is normally connected to the automatic operation side. Therefore, if the contact point of the power switch 14 is closed and the operation mode switching switch 15 is connected to the automatic operation side, the normal operation command generation relay 16 is energized, and the operation mode is the same as the automatic operation mode. Become. In the automatic operation mode, the car 1 is automatically operated in response to a call from the hall or the car 1.

 From this state, when the detection switch 12 is switched to the maintenance operation side and the operation mode switching switch 15 is switched to the maintenance operation side, the operation mode is switched to the maintenance operation mode. In the maintenance operation mode, calls from the car 1 and the landing are invalidated, and the car 1 is moved up and down at a low speed by the operation of the maintenance travel switch 17 by the maintenance staff.

[0019] In such an elevator apparatus, the tread plate 5 displaced to the load position is provided with the release handle 11. Until it is operated, it is mechanically held at the load position by the holding mechanism 10, so that it is necessary to close the landing door without operating the operation mode switch 15 and The car 1 will not be automatically operated even if the maintenance staff moves. That is, it is possible to more reliably prevent the car 1 from being automatically operated with the maintenance person on the car 1.

 [0020] Further, since the tread plate 5 is mechanically held at the weighted position by the holding mechanism 10, maintenance personnel operate the power switch 14 and the operation mode switching switch 15 by mistake during recovery from a failure accompanied by a power failure. Even if you have forgotten to enter the car 1, the detection switch 12 is operated by the tread plate 5, so that the car 1 is prevented from operating.

 Furthermore, since the release handle 11 is provided in the vicinity of the front end portion of the tread plate 5, the release handle 11 can be operated after moving to the landing.

 In addition, operation mode switching switch 15 is provided on car 1 separately from detection switch 12, and maintenance operation is possible only when detection switch 12 is activated and operation mode switching switch 15 is switched to the maintenance operation side. Since the automatic operation is enabled only when the detection switch 12 is released and the operation mode switching switch 15 is switched to the automatic operation side, erroneous switching of the operation mode can be prevented more reliably.

 [0022] In this case, the release handle 11 and the latch 8 may be integrated. In this case, for example, a commercially available door part in which the handle and the latch are integrated can be used, and the cost can be reduced. The power to do S.

 Further, in the above example, the latch 8 is provided on the tread 5 and the latch engaging member 9 is provided on the force chamber 2, but conversely, the latch engaging member 9 is provided on the tread 5, and on the force chamber 2. A latch 8 may be provided.

[0023] Embodiment 2.

Next, FIG. 3 is a perspective view showing a force of an elevator apparatus according to Embodiment 2 of the present invention. Although omitted in FIG. 1 for simplicity, FIG. 3 also shows a support structure for the car door 3. In the figure, a release button 21 serving as a release operation portion for releasing the holding of the tread 5 from the weighted position by the holding mechanism 10 is provided on the end face (front end face) on the landing entrance 4 side of the tread 5. By pressing the release button 21 in the direction of arrow B in the figure, the latch 8 retracts toward the tread plate 5 and the engagement of the latch 8 with the latch engaging member 9 is released. As a result, the front end of the tread 5 is pushed up by the spring 7 (FIG. 1), and the tread 5 is returned to the normal position. [0024] An inverted L-shaped girder 22 that supports the force door 3 is fixed to the upper part of the front surface of the force chamber 2. The girder 22 is provided with an opening 22a that exposes the release button 21 to the landing side. The release button 21 is operated from the landing side through the opening 22a.

 A door rail 23 that guides the opening / closing operation of the force door 3 is fixed to the beam 22. Each car door 3 includes a door panel 24, a door hanger 25 fixed to the top of the door panel 24, and a pair of hanger rollers 26 provided on the door hanger 25 and rolled on the door rail 23. The car door 3 is suspended from the door rail 23. Other configurations are the same as those in the first embodiment.

 [0026] In such an elevator apparatus, since the release button 21 is provided on the front end surface of the tread plate 5, the release button 21 can be more reliably operated from the landing.

 Further, since the opening 22a is provided in the girder 22 and the release button 21 is operated through the opening 22a, the release button 21 can be operated more reliably with a landing force.

 [0027] The release button 21 may be provided on the landing entrance 4 side of the girder 22. Accordingly, it becomes difficult to operate the release button 21 on the car 1, and the operation of the release button 21 can be more reliably performed at the landing force.

 [0028] Embodiment 3.

 Next, FIG. 4 is a circuit diagram showing an example of a circuit configuration of an elevator apparatus control apparatus according to Embodiment 3 of the present invention. In this example, the detection switch 12 also serves as an operation mode switching switch. That is, when the tread plate 5 is displaced to the weighted position by the load, the detection switch 12 is switched to the maintenance operation side, and the operation mode is switched to the maintenance operation mode. When the treadle 5 is returned to the normal position, the detection switch 12 is returned to the automatic operation side, and the operation mode is switched to the automatic operation mode. Other configurations are the same as those in the first or second embodiment.

In such an elevator apparatus, the operation mode is switched to the maintenance operation mode when the tread plate 5 is displaced to the load position, and the operation mode is returned to the automatic operation mode when the tread plate 5 is returned to the normal position. This eliminates the need for an operation mode switching switch, reduces costs, and prevents operation mode switching switches from being forgotten or mistakenly operated. In the above example, the release handle 11 and the release button 21 are shown as the release operation unit. However, the shape and mechanism of the release operation unit are not limited to these, and may be, for example, a knob. Further, the release operation unit is not limited to one that is rotated and pressed, and may be one that is pulled, for example.

 In the above example, the tread plate 5 is returned to the normal position by the restoring force of the spring 7. However, for example, an elastic body such as rubber may be used as a return means for returning the tread plate to the normal position. Furthermore, in the above example, the tread plate 5 is rotationally displaced between the normal position and the weighted position. For example, the entire tread plate may be displaced in the vertical direction.

 Furthermore, in the above example, one tread 5 is used, but it may be divided into a plurality of pieces. Also, in the above example, the force using one detection switch 12 is used. If it is detected that the treadle is displaced to the load position by one force, automatic operation is disabled. You may do it.

Claims

The scope of the claims  [1] Basket,  A tread that is provided near the entrance / exit edge on the car and that can be displaced from the normal position to the weighted position by weighting,  A holding mechanism for mechanically holding the tread plate displaced to the load position at the load position; a release operation unit for releasing the holding of the tread plate at the load position by the holding mechanism; a detection switch for detecting a displacement state of the tread; as well as  An elevator apparatus comprising a control device for controlling the operation of the force based on the operation state of the detection switch.  [2] The release operation portion is provided in the vicinity of a landing entrance side end portion of the tread. The elevator apparatus according to 1. [3] The elevator apparatus according to claim 1, wherein the release operation portion is provided on an end face on the landing entrance side of the tread.  [4] On the front upper part of the above cage, there is a girder that supports the force door,  The elevator apparatus according to claim 1, wherein the girder is provided with an opening for performing the release operation part from the landing entrance side.  [5] At the top front of the above car is a girder that supports the force door,  2. The elevator apparatus according to claim 1, wherein the release operation part is provided closer to the hall entrance / exit side than the girder. [6] The holding mechanism includes a latch that can be projected and retracted on either one of the step board and the force lever, and a lever on the other side of the step board and the cage. The elevator apparatus according to claim 1, further comprising a latch engaging member that is engaged with the latch when the lever is displaced.  [7] The elevator apparatus according to [6], wherein the latch and the release operation part are configured in a single body.  [8] An operation mode switching switch for switching the operation mode between the automatic operation mode and the maintenance operation mode is provided on the car. The control device detects that the treadle is in a load position by the detection switch. Only when the operation mode switching switch is switched to the maintenance operation side, the operation mode is switched to the maintenance operation mode, the detection switch detects that the treadle is in the normal position, and the operation mode is switched to the operation mode. The elevator apparatus according to claim 1, wherein the operation mode is switched to the automatic operation mode only when the switching switch is switched to the automatic operation side. The elevator apparatus according to claim 1, wherein the detection switch also serves as an operation mode switching switch for switching an operation mode between an automatic operation mode and a maintenance operation mode.