JPWO2018105109A1 - Elevator interlock device - Google Patents

Abstract

  In the elevator interlock device, the latch receiving member is provided with an inclined portion. The slide member has a normal position that allows the hook portion of the latch to be hung on the upper end of the inclined portion, and protrudes in the extension direction of the inclined portion from the upper end of the inclined portion so that the hook portion is hung on the upper end of the inclined portion. It is possible to slide along the inclined portion between the blocking position and the blocking position. Further, when the landing door is closed while the hook portion is located at a position lower than the upper end of the inclined portion, the slide member slides to the blocking position while the hook portion is placed by being pushed by the hook portion. .

Description

  The present invention relates to an elevator interlock device that prevents a landing door from being opened from the landing side when a car is not landing.

  In the conventional elevator safety device, a switch interlocking with the unlocking device for the landing door on the lowest floor is provided. When the unlocking device is operated, the switch is activated and the relay is opened. As a result, the elevator control system circuit is automatically disconnected (see, for example, Patent Document 1).

JP-A-8-91730

  In the conventional safety device as described above, if it is detected that the maintenance staff manually opens the landing door on the other floors, it is necessary to install an expensive switch linked to the unlocking device on the other floors. Yes, the cost for installing switches and circuits and the cost for maintaining reliability are high.

  The present invention has been made to solve the above-described problems, and provides an elevator interlock device that can detect that a maintenance person manually opens a landing door with a simpler configuration. With the goal.

An elevator interlock device according to the present invention is provided at an upper portion of a landing doorway, and is provided rotatably on a landing door, a latch receiving member having an inclined portion inclined with respect to the opening / closing direction of the landing door. And has a hook part that is hung on the upper end of the inclined part to prevent the landing door from moving in the opening direction when the landing door is fully closed, and the car door is opened when the car is landing. A latch that rotates to the position where the hook part moves away from the upper end of the inclined part in conjunction with the operation, an interlock contact provided at the upper part of the landing doorway, and a latch, and the hook part is hooked on the tip of the inclined part An interlock switch having a lock contact that is in contact with the interlock contact when being engaged, and a normal position that allows the hook portion to be hooked on the upper end of the inclined portion, and an upper end of the inclined portion. The slide member includes a slide member that can slide along the inclined portion between the blocking portion that protrudes in the extension direction of the inclined portion and prevents the hook portion from being hung on the upper end of the inclined portion. When the landing door is closed while being in a position lower than the upper end of the section, it is slid to the blocking position with the hook section being pushed by being pushed by the hook section, and the hook section from the state of being positioned at the blocking position When is released, it returns to its normal position due to its own weight.
The elevator interlock device according to the present invention is provided at an upper portion of the landing doorway, and is latched with an inclined portion inclined with respect to the opening / closing direction of the landing door, and can be rotated to the landing door. A car door that is provided and has a hook portion that is hung on the upper end of the inclined portion when the landing door is in a fully closed state and prevents the landing door from moving in the opening direction. A latch that rotates to the position where the hook part is disengaged from the upper end of the inclined part in conjunction with the opening operation of the door, an interlock contact provided at the upper part of the landing doorway, and a latch, the hook part being the tip of the inclined part Interlock switch having a lock contact that touches the interlock contact when it is hung on the landing door, and the landing door is closed while the hook portion is at a position lower than the upper end of the inclined portion. Hooked portion is provided with a sensor for detecting that hits the inclined portion.

  The elevator interlock device according to the present invention can detect that the maintenance person manually opens the landing door with a simpler configuration.

It is a block diagram which shows the elevator by Embodiment 1 of this invention. It is the front view which looked at the landing door of FIG. 1 from the hoistway side. It is a front view which expands and shows the interlock apparatus of FIG. It is a front view which shows the state which the slide member of the interlock apparatus of FIG. 3 moved to the prevention position. It is a side view which expands and shows the slide member of FIG. It is explanatory drawing which shows the interlock apparatus of FIG. 3 typically. It is explanatory drawing which shows a motion of the interlock apparatus at the time of normal opening / closing operation | movement of the landing door of FIG. It is explanatory drawing which shows a motion of an interlock apparatus when the landing door of FIG. 6 opens and closes manually by a maintenance worker. It is a front view which shows the interlock apparatus by Embodiment 2 of this invention. It is a front view which shows the interlock apparatus by Embodiment 3 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided in the upper part of the hoistway 1. In the machine room 2, a hoisting machine 3, a deflector 4, and a control device 5 are installed. The hoisting machine 3 has a drive sheave 6, a hoisting machine motor 7, and a hoisting machine brake 8. The hoist motor 7 rotates the drive sheave 6. The hoisting machine brake 8 brakes the rotation of the drive sheave 6.

  A suspension body 9 is wound around the drive sheave 6 and the deflecting wheel 4. As the suspension body 9, a plurality of ropes or a plurality of belts are used. A car 10 is connected to the first end of the suspension body 9. A counterweight 11 is connected to the second end of the suspension body 9.

  The car 10 and the counterweight 11 are suspended in the hoistway 1 by the suspension body 9, and move up and down in the hoistway 1 by rotating the drive sheave 6. The control device 5 moves the car 10 up and down at a set speed by controlling the hoisting machine 3.

  A pair of car guide rails 12 and a pair of counterweight guide rails 13 are installed in the hoistway 1. In FIG. 1, only the car guide rail 12 on one side and the counterweight guide rail 13 on one side are shown. The car guide rail 12 guides the raising and lowering of the car 10. The counterweight guide rail 13 guides the lifting and lowering of the counterweight 11. A car buffer 14 and a counterweight buffer 15 are installed at the bottom of the hoistway 1.

  An emergency stop device 16 is mounted on the lower portion of the car 10. The emergency stop device 16 grips the pair of car guide rails 12 and makes the car 10 stop emergency. The emergency stop device 16 is provided with an operating lever 17 for operating the emergency stop device 16.

  The machine room 2 is provided with a speed governor 18. The governor 18 monitors whether the car 10 is traveling at an excessive speed. The governor 18 includes a governor sheave 19, an overspeed detection switch (not shown), a rope catch (not shown), and the like. A governor rope 20 is wound around the governor sheave 19.

  The governor rope 20 is laid in a ring shape in the hoistway 1 and connected to the operating lever 17. The governor rope 20 is wound around a tension wheel 21 disposed at the lower part of the hoistway 1.

  The car 10 is provided with a pair of car doors 22 for opening and closing the car doorway. A pair of landing doors 23 for opening and closing the landing doorway are provided at the landings on the plurality of floors. The landing door 23 opens and closes in conjunction with the opening and closing operation of the car door 22 when the car 10 is landed.

  FIG. 2 is a front view of the landing door 23 of FIG. 1 viewed from the hoistway side. A landing door frame 24 is fixed to the upper part of the landing entrance. The landing door frame 24 is provided with a landing door rail 25 parallel to the width direction of the landing doorway.

  A first landing door pulley 26 is provided at a first end in the longitudinal direction of the landing door frame 24. A second landing door pulley 27 is provided at a second end in the longitudinal direction of the landing door frame 24. An endless interlocking rope 28 is wound around the first and second landing door pulleys 26 and 27.

  Each landing door 23 has a landing door panel 29 and a landing door hanger 30 fixed to the upper portion of the landing door panel 29. Each landing door hanger 30 is provided with a plurality of landing door rollers 31 that move while rolling on the landing door rail 25. Each landing door 23 is suspended from the landing door rail 25 and opens and closes along the landing door rail 25.

  The first landing door, which is one landing door 23, is connected to the interlocking rope 28 via the first landing door coupling fitting 32. The second landing door, which is the other landing door 23, is connected to the interlocking rope 28 via the second landing door coupling fitting 33.

  The opening / closing operation of the first landing door is transmitted to the second landing door via the interlocking rope 28. Thereby, the second landing door moves in the opposite direction to the first landing door.

  A latch receiving member 34 is fixed to the center portion of the landing door frame 24 in the longitudinal direction. A latch 35 is rotatably attached to the landing door hanger 30 of the first landing door. When the landing door 23 is in the fully closed state, the latch 35 is hooked on the latch receiving member 34, thereby preventing the landing door 23 from moving in the opening direction.

  The latch 35 is provided with a first roller 36 and a second roller 37. The first roller 36 is provided coaxially with the rotation axis of the latch 35. Further, the first roller 36 rotates integrally with the latch 35 around the rotation axis of the latch 35.

  When the latch 35 is hooked on the latch receiving member 34, the second roller 37 is located above the first roller 36 and on the opposite side of the first roller 36 from the door of the first landing door. Is located.

  FIG. 3 is an enlarged front view showing the interlock device of FIG. A mounting plate 38 is fixed to the landing door frame 24. The latch receiving member 34 is fixed to the lower end portion of the mounting plate 38.

  An interlock switch 39 is provided between the mounting plate 38 and the latch 35 to detect whether the latch 35 is hooked on the latch receiving member 34. The interlock switch 39 has an interlock contact 40 provided above the latch receiving member 34 of the mounting plate 38 and a lock contact 41 fixed to the latch 35.

  When the landing door 23 is fully closed and the latch 35 is hooked on the latch receiving member 34, the lock contact 41 is in contact with the interlock contact 40 and the interlock switch 39 is closed. When the latch 35 is released from the latch receiving member 34, the lock contact 41 is separated from the interlock contact 40, and the interlock switch 39 is opened. Thereby, a safety circuit is interrupted | blocked and the driving | operation of the cage | basket | car 10 is prevented.

  The end of the latch receiving member 34 on the latch 35 side is bent in a V shape, and an inclined portion 34 a that is inclined with respect to the opening / closing direction of the landing door 23 is provided. The inclined portion 34a is inclined so as to become gradually higher toward the landing door 23 provided with the latch 35, that is, in the closing direction of the first landing door (left direction in FIG. 3).

  The latch 35 has a hook portion 35a. The hook portion 35 a is provided at the tip end portion of the latch 35, that is, the end portion on the opposite side to the first roller 36. Further, the hook portion 35a is hung on the upper end (left end in FIG. 3) of the inclined portion 34a when the landing door 23 is in the fully closed state, and prevents the first landing door from moving in the opening direction.

  Further, the latch 35 rotates to a position where the hook portion 35a is detached from the upper end of the inclined portion 34a in conjunction with the opening operation of the car door 22 when the car 10 is landed. The car door 22 is provided with a movable vane 42 that pushes the second roller 37 to rotate the latch 35 when the car door 22 is opened.

  A flat slide member 51 is provided on the inclined portion 34a. The slide member 51 can slide linearly along the upper surface of the inclined portion 34a between the normal position shown in FIG. 3 and the blocking position shown in FIG.

  The normal position is a position that allows the hook portion 35a to be hung on the upper end of the inclined portion 34a. The blocking position is a position that protrudes in the extending direction of the inclined portion 34a from the upper end of the inclined portion 34a and prevents the hook portion 35a from being hung on the upper end of the inclined portion 34a.

  When the landing door 23 is closed while the hook portion 35a is located at a position lower than the upper end of the inclined portion 34a, the slide member 51 hits the hook portion 35a and is pushed by the hook portion 35a. As shown in FIG. 4, the hook portion 35a is slid to the blocking position while being placed.

  Further, the slide member 51 returns to the normal position by its own weight when the hook portion 35a is released from the state of being located at the blocking position. Further, the slide member 51 does not interfere with the latch 35 during the normal opening / closing operation of the landing door 23 with the car 10 landing.

  FIG. 5 is an enlarged side view showing the slide member 51 of FIG. A plurality of protrusions 51 a are provided on the upper surface of the slide member 51. When the hook portion 35a pushes up the slide member 51, one of the protrusions 51a is hooked on the hook portion 35a.

  The protrusions 51 a are arranged at equal intervals in the longitudinal direction of the slide member 51. Each protrusion 51a is formed continuously along the width direction of the slide member 51 (direction perpendicular to the paper surface of FIG. 5).

  A linear guide 51 b is provided on the lower surface of the slide member 51. Thereby, the friction coefficient between the slide member 51 and the inclined portion 34a is sufficiently reduced.

  6 is an explanatory view schematically showing the interlock device of FIG. 3, FIG. 7 is an explanatory view showing the movement of the interlock device during normal opening / closing operation of the landing door 23 of FIG. 6, and FIG. 8 is the landing door of FIG. It is explanatory drawing which shows a motion of an interlock apparatus when a manual opening / closing operation | movement is performed by a maintenance worker.

  During normal opening / closing operation of the landing door 23, as shown in FIG. 7, the first roller 36 and the second roller 37 are sandwiched between the movable vane 42 and the fixed vane 43 provided on the car door 22. The latch 35 moves together with the landing door 23 in the state where it is held.

  For this reason, when the landing door 23 is closed, the hook portion 35a moves while being positioned above the upper end of the inclined portion 34a, and is dropped from the position passing through the upper end of the inclined portion 34a and hung on the upper end of the inclined portion 34a. It is done.

  On the other hand, when the maintenance person manually opens the landing door 23, the latch 35 is rotated by a dedicated key operation to remove the hook portion 35a from the upper end of the inclined portion 34a and move the landing door 23 in the opening direction. . After the hook portion 35a passes the upper end of the inclined portion 34a, the latch 35 is rotated counterclockwise from the position of FIG. 7 by its own weight.

  Further, when the landing door 23 is closed from the state shown in FIG. 8, the hook portion 35a moves to the left in the drawing while remaining in the position shown in FIG. It takes.

  Thus, the locus of the latch 35 is different between the normal opening / closing operation and the opening / closing operation by the maintenance staff. In the first embodiment, it is detected that the maintenance staff manually opens the landing door 23 based on the difference in the trajectory. That is, the hook portion 35a does not interfere with the slide member 51 in the locus indicated by the arrow in FIG. However, in the locus shown by the arrow in FIG. 8, the hook portion 35a hits the slide member 51 immediately before the landing door 23 reaches the fully closed position.

  As a result, as shown in FIG. 4, the slide member 51 is moved to the blocking position, and the hook portion 35a is blocked from being hooked on the upper end of the inclined portion 34a. At this time, contact of the lock contact 41 with the interlock contact 40 is also prevented, and the operation mode of the elevator does not return to automatic operation.

  Thereafter, the operation mode can be switched to the maintenance operation mode by an operation by a maintenance worker on the hoistway pit or the car 10. In addition, when the maintenance staff lifts the hook part 35a slightly from the position shown in FIG. 4, the slide member 51 returns to the normal position. Then, by hooking the hook portion 35a on the upper end of the inclined portion 34a, the interlock switch 39 is closed, and the car 10 can travel.

  In such an interlock device, since it is only necessary to add the slide member 51 to the inclined portion 34a, it is possible to detect that the maintenance person manually opens the landing door 23 with a simpler configuration.

  Further, since addition of a switch, a sensor, and an electric circuit is not necessary, the configuration can be further simplified, and the cost can be reduced even when applied to many landing interlock devices.

  In addition, when the hook part 35a hits the slide member 51, a high frictional force is applied to the portion of the hook part 35a that contacts the slide member 51 so that the slide member 51 can be pushed up along the inclined part 34a more reliably. A member such as rubber or resin having a higher friction coefficient with respect to the inclined portion 34a than that of the latch 35 may be attached.

Further, a linear guide may be provided on the inclined portion 34a side.
Furthermore, the number of the protrusions 51a is not particularly limited, and may be one, for example.

Further, the slide member 51 may be provided in all the landing interlock devices or only in some of the landing devices, for example, the landing interlock devices generally used when maintenance personnel enter the hoistway 1. Good.
Furthermore, the slide member 51 may be installed when an elevator is newly installed, or may be additionally installed on an existing elevator.

  Moreover, you may provide an electric contact sensor in the part which contacts the slide member 51 of the hook part 35a, or the part which contacts the hook part 35a of the slide member 51. FIG. Thereby, it can be directly detected that the hook portion 35a is in contact with the slide member 51. Such a contact sensor may be applied only to some landing interlock devices.

Embodiment 2. FIG.
Next, FIG. 9 is a front view showing an interlock device according to Embodiment 2 of the present invention. In the second embodiment, the rotation range of the latch 35 in the direction away from the latch receiving member 34 is restricted. That is, the latch 35 cannot rotate in a direction away from the latch receiving member 34 from the state where the hook portion 35a is in contact with the slide member 51 in the blocking position, that is, the state shown in FIG.

  The first roller 36 is provided with a key hole 36a. By inserting a dedicated key (not shown) into the key hole 36a, the latch 35 can be rotated further away from the latch receiving member 34 than in the state of FIG. That is, the hook portion 35a can be separated from the slide member 51 only by using a dedicated key. Other configurations are the same as those in the first embodiment.

  According to such a configuration, when the landing door 23 is closed after the maintenance person manually opens the landing door 23 and enters the hoistway 1, the car 10 cannot be moved without using the dedicated key. Can be.

Alternatively, the operation mode selector switch on the car 10 may be changed to the dedicated key described above, and the operation mode may be switched to the maintenance operation mode so that the dedicated key is removed.
Further, a key used when the maintenance staff manually opens the landing door 23 from the landing may be shared with the dedicated key.

Embodiment 3 FIG.
Next, FIG. 10 is a front view showing an interlock device according to Embodiment 3 of the present invention. During normal opening / closing operation of the landing door 23, the hook portion 35a is removed from the upper end of the inclined portion 34a by the movable vane 42. Indicates the state.

  In the third embodiment, the slide member 51 is not used. In the third embodiment, the sensor 52 is provided at the end of the latch receiving member 34 on the first roller 36 side. The sensor 52 detects that the landing door 23 is closed and the hook portion 35a hits the inclined portion 34a while the hook portion 35a is in a position lower than the upper end of the inclined portion 34a.

  As the sensor 52, for example, a simple switch operated when the hook portion 35a comes into contact, or a non-contact type proximity sensor that detects the approach of the hook portion 35a can be used. As the proximity sensor, for example, an ultrasonic sensor, a laser sensor, a photoelectric sensor, or an eddy current sensor can be used.

  When the hook portion 35a is detected by the sensor 52, the safety circuit is interrupted by a relay (not shown). For this reason, even if the hook portion 35a gets over the inclined portion 34a and the lock contact 41 contacts the interlock contact 40 when the landing door 23 is opened and closed by the maintenance staff, the safety circuit remains cut off.

  When the safety circuit is interrupted by the sensor 52, the maintenance staff operates a return switch (not shown), whereby the safety circuit is closed by the relay, and the car 10 can run. The return switch is provided on the car 10, for example. Other configurations are the same as those in the first embodiment.

  In such an interlock device, since it is only necessary to add a simple sensor 52 to the latch receiving member 34, it is possible to detect that the maintenance person manually opens the landing door 23 with a simpler configuration.

  In addition, the inclined portion 34a of the latch receiving member 34 does not come into contact with the hook portion 35a during the normal opening / closing operation of the landing door 23. Therefore, deterioration of the sensor 52 due to friction can be prevented, and reliability can be maintained at low cost.

Note that the sensor 52 may be provided in all the landing interlock devices or only in a part of the landing devices, for example, the landing interlock devices generally used when maintenance personnel enter the hoistway 1. .
In addition, the sensor 52 may be installed when an elevator is newly installed, or may be additionally installed on an existing elevator.
Furthermore, the layout of the elevator to which the present invention is applied is not limited to FIG. 1, and the present invention can also be applied to, for example, a 2: 1 roping elevator.
Furthermore, the present invention can be applied to various types of elevators such as a machine room-less elevator (MRL elevator), a double deck elevator, a one-shaft multi-car elevator, and a hydraulic elevator.

  10 car, 22 car door, 23 landing door, 34 latch receiving member, 34a inclined part, 35 latch, 35a hook part, 39 interlock switch, 40 interlock contact, 41 lock contact, 51 slide member, 51a protrusion, 52 sensor .

Claims (4)

A latch receiving member provided at an upper portion of the landing doorway and having an inclined portion inclined with respect to the opening / closing direction of the landing door;
The landing door is rotatably provided, and has a hook portion that is hung on an upper end of the inclined portion when the landing door is in a fully closed state to prevent the landing door from moving in the opening direction. A latch that rotates to the position where the hook part is disengaged from the upper end of the inclined part in conjunction with the opening operation of the car door when the car is landed,
An interlock contact provided at an upper portion of the landing doorway and a lock contact provided at the latch and in contact with the interlock contact when the hook portion is hung on a tip of the inclined portion. An interlock switch, and a normal position that allows the hook portion to be hung on an upper end of the inclined portion, and the hook portion protrudes in an extending direction of the inclined portion from the upper end of the inclined portion. A sliding member that is slidable along the inclined portion between a blocking position that prevents the hook from being hung on the upper end of the portion,
The slide member is
When the landing door is closed while the hook portion is at a position lower than the upper end of the inclined portion, the hook portion is pushed by the hook portion to slide to the blocking position with the hook portion mounted. ,
An elevator interlock device that returns to the normal position by its own weight when the hook portion is released from the state in the blocking position.   The elevator interlock device according to claim 1, wherein a protrusion on which the hook portion is hooked when being pushed by the hook portion is provided on an upper surface of the slide member. The rotation range of the latch in a direction away from the latch receiving member is restricted,
The elevator interlock device according to claim 1 or 2, wherein the hook portion can be separated from the slide member only by using a dedicated key. A latch receiving member provided at an upper portion of the landing doorway and having an inclined portion inclined with respect to the opening / closing direction of the landing door;
The landing door is rotatably provided, and has a hook portion that is hung on an upper end of the inclined portion when the landing door is in a fully closed state to prevent the landing door from moving in the opening direction. A latch that rotates to the position where the hook part is disengaged from the upper end of the inclined part in conjunction with the opening operation of the car door when the car is landed,
An interlock contact provided at an upper portion of the landing doorway and a lock contact provided at the latch and in contact with the interlock contact when the hook portion is hung on a tip of the inclined portion. An interlock switch, and a sensor for detecting that the landing door is closed and the hook portion hits the inclined portion while the hook portion is in a position lower than the upper end of the inclined portion. The elevator interlock device.

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