JP2015030606A - Unlocking device for elevator landing door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unlocking device for an elevator landing door, capable of certainly preventing destruction of a locking device, when unlocking the locking device of the landing door.SOLUTION: An unlocking device for an elevator landing door used for unlocking a locking device 4 including a turnable hook 2 provided in a landing stage of an elevator, and an engagement part 3 which locks the landing door 1 by engaging to the hook 2, includes: a key rod 10 to be inserted into a hole part 5 formed in the landing stage for pushing up the hook 2 to turn it; and pushing up-releasing means which releases pushing up operation to the hook 2 by the key rod 10 when a pushing up force to the hook 2 by the key rod 10 has exceeded a prescribed value slightly smaller than a value likely to destroy the locking device 4, for example.

Description

  The present invention relates to an elevator landing door unlocking device used when unlocking a locked elevator landing door.

  Conventionally, elevator landing doors are locked by a locking device that includes a pivotable hook and an engaging portion that engages with the hook and locks the landing door. It can be unlocked by an unlocking operation by a worker.

  For example, Patent Document 1 discloses a landing door unlocking device that is inserted from a landing into a keyhole formed in an elevator landing to unlock the landing door.

JP 2000-143134 A

  In the prior art described above, when the unlocking device is inserted into the keyhole from the landing and unlocked, it has not been possible to determine whether or not it has been unlocked. For this reason, there is a possibility that the unlocking device is inserted into the keyhole with an excessive force to destroy the locking device of the landing door.

  The present invention has been made based on the above-described situation in the prior art. The purpose of the present invention is to unlock an elevator landing door that can reliably prevent the locking device from being destroyed when the landing door locking device is unlocked. To provide an apparatus.

  In order to achieve the above object, an elevator hall door unlocking device according to the present invention includes a pivotable hook provided at an elevator hall, and an engaging portion that engages with the hook to lock the hallway. An unlocking device for an elevator hall that unlocks a locking device including a key rod that is inserted into a hole formed in the landing and rotates the hook by pushing up the hook, and the key rod pushes up the hook A push-up releasing means for releasing the push-up operation with respect to the hook by the key bar when a force exceeds a predetermined value that is smaller than a value that is considered to cause damage to the locking device; It is characterized by.

  When the unlocking device for an elevator landing door according to the present invention unlocks the locking device for the landing door from the landing, when the key bar tries to push up the hook of the locking device with an excessive pushing force exceeding a predetermined value. The push-up operation on the hook by the key bar is forcibly released. Therefore, according to the present invention, an excessive push-up force is not applied to the locking device as in the prior art, and the locking device can be reliably prevented from being broken. Thereby, this invention can implement | achieve the unlocking apparatus with higher reliability than before.

It is a longitudinal cross-sectional view which shows one Embodiment of the unlocking apparatus of the elevator landing door which concerns on this invention. It is a principal part enlarged view of FIG. It is a figure which shows the state just before unlocking the locking apparatus provided in an elevator hall with the unlocking apparatus which concerns on this embodiment. It is a figure which shows the state which unlocked the locking apparatus provided in an elevator hall with the unlocking apparatus which concerns on this embodiment. It is a figure which shows operation | movement when the pushing-up force with respect to the hook with a key stick exceeds predetermined value, and is a longitudinal cross-sectional view which shows the state just before a bottom cover rotates. It is a figure which shows operation | movement when the pushing-up force with respect to the hook by a key stick exceeds predetermined value, and is a longitudinal cross-sectional view which shows the state which the bottom cover rotated.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an unlocking device for an elevator hall according to the present invention will be described with reference to the drawings.

  First, based on FIGS. 3 and 4, a locking device provided in an elevator hall unlocked by the unlocking device according to the present embodiment will be described.

  As shown in FIGS. 3 and 4, the locking device 4 locks the landing door 1 so as not to open, and is provided at the landing of the elevator. The locking device 4 has a recess 2b at the lower portion, a hook 2 that can be rotated, and a protrusion 3a that engages the recess 2b of the hook 2 at the tip, and an engaging portion 3 that locks the landing door 1. And.

  As shown in FIG. 4, the unlocking device according to the present embodiment is inserted into a hole 5 formed in a landing, and pushes up the hook 2 of the locking device 4 to rotate it. When the pushing-up force on the hook 2 by the screw rod exceeds a predetermined value, for example, a value that is slightly smaller than the value considered to possibly damage the locking device 4, the pushing-up operation on the hook 2 by the key 10 is released. And a push-up operation canceling means.

  That is, as shown in FIGS. 1 and 2, the unlocking device according to the present embodiment is housed together with the key stick 10 described above so that the key stick 10 is movable in the vertical direction, and the key stick 10 is inserted into the upper wall. A case 11 having a hole 11a is provided.

  Further, the present embodiment is housed in the case 11 and is attached to an elastic member that urges the key 10 upward, that is, a compression coil spring 12 and a lower part of the case 11 so as to be rotatable around a fulcrum 13a. A bottom lid 13 that can close the opening 19 shown in FIG. 6 formed in the lower part of the case 11 is provided.

  Moreover, this embodiment is provided in the bottom cover 13 so that a movement is possible, the engagement member 14 which can be engaged with the hole 11b provided in the surrounding wall of the case 11, and the bottom cover 13 is provided. An elastic member that is biased so as to be engaged with a hole 11 b provided on the peripheral wall of the case 11, that is, a compression coil spring 15 is provided.

  The above-described push-up releasing means includes an engaging member moving portion that moves the engaging member 14 so as to release the engagement between the engaging member 14 and the hole 11b provided in the peripheral wall of the case 11. This engaging member moving part is a hole provided in the peripheral wall of the case 11 so that the engaging member 14 can move in the vertical direction facing the lower end part of the key bar 10 and moves downward. A release rod 16 disposed in the case 11 is included so as to be able to be driven in a direction away from 11b.

  A support portion 17 is fixed to the upper surface of the bottom lid 13, and the release rod 16 is inserted into a hole portion 17 a provided in the support portion 17. In addition, the release rod 16 is provided with a flange portion 16 b that can contact the upper portion of the support portion 17. The bottom cover 13 is formed with a hole 13b into which the release rod 16 is inserted.

  As shown in FIG. 2, the engaging member 14 has a hole 14b in which an inclined portion 14a is formed, and the release rod 16 engages with the inclined portion 14a of the hole 14b of the engaging member 14 at the lower end. It has an inclined portion 16a.

  As shown in FIG. 1, the key bar 10 described above has a flange portion 10 a whose upward movement is restricted by the upper wall of the case 11. As will be described later, the case 11 is provided with a receiving member 18 that receives the flange portion 10a of the key bar 10 from the case 11 when the key bar 10 is dropped when the bottom cover 13 is opened. The upper end of the compression coil spring 12 is attached to the flange portion 10 a of the key bar 10, and the lower end is engaged with the upper surface of the bottom cover 13. The predetermined value of the push-up force described above is determined by the spring force of the compression coil spring 12.

  When unlocking the locking device 4 that locks the landing door 1 by using the unlocking device according to the present embodiment configured as described above, for example, a maintenance person holds the case 11 as described above. The key stick 10 is inserted into the hole 5 shown in FIG. 3, and the case 11 and the key stick 10 are pushed up. As a result, the hook 2 engaged with the engaging portion 3 shown in FIG. 4 is rotated upward about the fulcrum 2a, and the protrusion 3a of the engaging portion 3 and the recess 2b of the hook 2 are engaged. Once unlocked, the landing door 1 can be opened manually by maintenance personnel.

  In the unlocking operation of the locking device 4 as described above, when the pushing force of the key bar 10 engaged with the hook 2 exceeds the above-described predetermined value by strongly pushing up the case 11, as shown in FIG. The case 11 slides relatively upward with respect to the key bar 10, the compression coil spring 12 is bent and deformed, the lower end of the key bar 10 abuts on the upper end of the release bar 16, and the release bar 16 is further lowered. Pushed down.

  At this time, since the inclined portion 16a of the release rod 16 and the inclined portion 14a of the engaging member 14 are engaged with each other, the engaging member 14 keeps the inside of the bottom lid 13 while bending and deforming the compression coil spring 15. Move leftward in FIG. As a result, the right end portion shown in FIG. 5 of the engaging member 14 is detached from the hole portion 11 b provided in the peripheral wall of the case 11.

  Therefore, as shown in FIG. 6, the bottom cover 13 provided with the engaging member 14, the compression coil spring 15, the support portion 17, and the release rod 16 has its own weight and each of the bottom covers 13 provided on the bottom cover 13. The weight of the member rotates downward about the fulcrum 13a, an opening 19 is formed in the lower part of the case 11, the compression coil spring 12 falls from the opening 19, and the key bar 10 falls. At this time, the key bar 10 can be prevented from falling off the case 11 by the flange portion 10 a coming into contact with the receiving member 18 provided on the case 11.

  As described above, when the unlocking device according to the present embodiment unlocks the locking device 4 of the landing door 1 from the landing, the hook of the locking device 4 with the excessive push-up force of the key bar 10 exceeding a predetermined value. When pushing up 2, the push-up operation on the hook 2 by the key 10 is forcibly released. Therefore, in the present embodiment, an excessive push-up force is not applied to the locking device 4, and the locking device 4 can be reliably prevented from being broken. Thereby, this embodiment can implement | achieve a highly reliable unlocking apparatus.

1 landing door 2 hook 2a fulcrum 2b recess 3 engaging part 3a protrusion 4 locking device 5 hole 10 key bar 10a flange 11 case 11a hole 11b hole 12 compression coil spring (elastic member)
13 bottom cover 13a fulcrum 13b hole 14 engaging member 14a inclined part 14b hole 15 compression coil spring (elastic member)
16 Release rod (engagement member moving part) [push-up release means]
16a inclined portion 16b flange portion 17 support portion 17a hole portion 18 receiving member 19 opening portion

Claims (6)

In an elevator landing door unlocking device for unlocking a locking device including a pivotable hook provided at an elevator hall and an engaging portion that engages with the hook and locks the landing door.
From a value that is inserted into a hole formed in the landing and pushes up the hook to rotate and a push-up force of the key stick against the hook is considered to damage the locking device. An elevator landing door unlocking device comprising: a push-up releasing means for releasing a push-up operation on the hook by the key stick when a predetermined value which is a small value is exceeded. In the elevator landing door unlocking device according to claim 1,
A case in which the key bar is accommodated so as to be movable in the vertical direction, and a hole portion into which the key bar is inserted in an upper wall; and an elastic member that is accommodated in the case and biases the key bar upward. An elevator hall unlocking device, comprising: a bottom lid that is pivotally attached to a lower portion of the case and capable of closing an opening formed in the lower portion of the case. In the elevator landing door unlocking device according to claim 2,
An engagement member provided movably on the bottom lid and engageable with a hole provided on a peripheral wall of the case, and provided on the bottom lid, and the engagement member provided on the peripheral wall of the case An elastic member that is biased so as to be engaged with the hole,
The push-up releasing means includes an engaging member moving part that moves the engaging member so as to release the engagement between the engaging member and the hole provided in the peripheral wall of the case. Elevator hall unlocking device. In the elevator landing door unlocking device according to claim 3,
The engagement member moving portion is configured to be movable in the vertical direction opposite to the lower end portion of the key bar, and the engagement member is provided in the peripheral wall of the case in accordance with the downward movement. An unlocking device for an elevator landing door, comprising a release rod disposed in the case so as to be capable of being driven in a direction to be detached from the section. In the elevator landing door unlocking device according to claim 4,
The engaging member has a hole portion in which an inclined portion is formed, and the release rod has an inclined portion that engages with the inclined portion of the hole portion of the engaging member at a lower end. Elevator hall unlocking device. In the unlocking device of the elevator hall according to any one of claims 2 to 5,
The key bar has a flange portion that is restricted from moving upward by the upper wall of the case,
An elevator hall unlocking device comprising a receiving member in the case for receiving the flange portion of the key bar so that it does not fall out of the case when the key bar falls.

Images