JP4245320B2 - Elevator door unlocking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator door unlocking device for manually unlocking a lock mechanism for locking a door provided at an entrance on the elevator landing side during maintenance and inspection of the elevator.
[0002]
[Prior art]
An opening / closing door is provided at the entrance / exit of the elevator platform, and when the car reaches the floor of the entrance / exit, the door is automatically opened based on the operation of the landing. The door is normally locked in a closed state by a lock mechanism, and when the car is landed, the lock mechanism is unlocked and the door is opened.
[0003]
On the other hand, at the time of maintenance and inspection of the elevator, the lock mechanism is manually unlocked from the elevator landing side using an unlock key, and the door is manually opened to perform maintenance inspection and the like.
[0004]
FIG. 12 shows an entrance / exit 1 of the elevator platform, and this entrance / exit 1 is constituted by a gate-shaped three-way frame 2. In this example, the entrance / exit 1 is provided with a pair of doors 3 a, 3 b, The doors 1a and 3b are interlocked with each other and moved in opposite directions, whereby the doorway 1 is opened and closed.
[0005]
As shown in FIG. 13, a header case 8 is provided inside the upper frame (screen plate) 2a of the three-way frame 2, and the pair of doors 3a, 3a are connected to the header case 8 via a suspension mechanism (not shown). 3b is suspended so that it can move right and left.
[0006]
A lock mechanism 9 is provided on the upper side of one door 3a. As shown in FIG. 14, the lock mechanism 9 has a lock lever 10, and the lock lever 10 rotates about a support shaft 11.
[0007]
The lock lever 10 has an engaging portion 14 and a pushing portion 15, and an engaging claw 16 is formed on the engaging portion 14. An engagement body 18 is provided on the inner surface of the header case 8, and the engagement claw 16 of the lock lever 10 is engaged with the engagement body 18, and the door 3 a is locked in the closed state by this engagement, and the opening thereof is released. It is blocked.
[0008]
Since the doors 3a and 3b are structured to move to the left and right in conjunction with each other, the door 3a and 3b are prevented from being opened and closed by locking one of the doors 3a.
[0009]
A keyhole 4 is formed in the upper part of one door 3a so as to communicate with the elevator landing side. When the doors 3a and 3b are manually opened for maintenance inspection and the like, the unlock key 20 is inserted into the keyhole 4 from the elevator landing side as shown in FIG. The unlock key 20 includes a main rod 21 and a movable rod 23 that is rotatably provided at the tip of the main rod 21 via a hinge pin 22.
[0010]
At the time of maintenance and inspection, the unlock key 20 is inserted into the keyhole 4 with the main rod 21 and the movable rod 23 extending linearly. As shown in FIG. 15, the movable rod 23 of the inserted unlock key 20 is rotated downward by its own weight after the insertion, and faces the pressing portion 15 of the lock lever 10 in the lock mechanism 9.
[0011]
When the unlock key 20 is turned in one direction from the elevator landing side in this state, the movable rod 23 hits the pushing portion 15, and the lock lever 10 is rotated in the counterclockwise direction in FIG. By rotating, the engaging claw 16 is disengaged from the engaging body 18, and the lock mechanism 9 is unlocked. Therefore, in this state, the doors 3a and 3b are manually opened from the elevator landing side and enter the hoistway. Work such as maintenance can be carried out.
[0012]
[Problems to be solved by the invention]
In such a conventional elevator door unlocking device, the keyhole 4 is exposed on the front surface of the door 3a as shown in FIG. 12, and the keyhole 4 is conspicuous in appearance and impairs the aesthetics, and the design is reduced. There's a problem.
[0013]
By the way, in the type where the upper frame of the three-sided frame and the surface of the door are not flush with each other and the door is shifted to the back side of the three-sided frame, there is no key hole on the door surface, It is possible to employ a configuration in which a thin plate material is inserted into the gap between the frame and the lock mechanism is manually unlocked.
[0014]
However, as shown in FIG. 13, it is difficult to adopt such a configuration in the type of door device in which the surface of the door 3 a and the surface of the upper frame 2 a of the three-way frame 2 are arranged substantially flush with each other, Therefore, it is necessary to provide the keyhole 4 with poor design.
[0015]
The present invention has been made paying attention to such points, and the object of the present invention is that even if the surface of the door is substantially flush with the surface of the upper frame of the three-way frame, An object of the present invention is to provide an unlocking device for an elevator door that can be easily unlocked manually from the elevator landing side while maintaining a good design without providing an unsightly keyhole that is exposed.
[0016]
[Means for Solving the Problems]
The invention according to claim 1 is an unlocking device for unlocking a lock mechanism for locking a door provided at an entrance on the elevator hall side constituted by a three-way frame by manual operation using an unlock key from the elevator hall side. In the unlocking device, the surface of the upper frame of the three-way frame and the surface of the door are substantially flush with each other, and the unlock key is located between the lower surface of the upper frame of the three-way frame and the upper surface of the door. It can be inserted from the elevator landing side through the gap to the back side of the door, and the unlocking mechanism can be unlocked by sliding the unlock key inserted laterally, and the door faces the gap. A horizontally long slit-shaped keyhole is provided, and the unlocking key can be inserted into the back side of the door through the keyhole, and the unlocking key has an operation portion with a predetermined width. A relief portion having a length larger than the depth dimension of the keyhole is formed in the side edge of the operation portion, and the keyhole has a laterally long dimension sufficiently larger than the width of the operation portion of the unlock key. On the other hand, a part of the opening of the hole is closed so that the contact plate can be attached and detached so that the substantially horizontally long dimension of the keyhole is slightly larger than the width dimension of the operation part of the unlock key. It is said.
[0020]
The invention according to claim 2 is characterized in that the lock mechanism is provided with an unlock lever, and the slide operation of the unlock key is transmitted to the lock mechanism via the unlock lever.
[0021]
According to a third aspect of the present invention, when the unlock lever is normally held in a non-contact state with the lock mechanism by an urging force of an elastic member, and the unlock key is inserted and slid in the lateral direction, The unlock lever operates against the elastic member to contact the lock mechanism, and the sliding operation of the unlock key is transmitted to the lock mechanism by this contact.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part corresponding to the conventional structure, and the detailed description is abbreviate | omitted.
[0023]
1 and 2 show a first embodiment of the present invention. The surfaces of the doors 3a and 3b are flush with the surface of the upper frame 2a of the three-way frame 2. A step portion 6 having an upright wall 5 is formed at the rear upper end of each door 3a, 3b, and the step portion 6 is disposed so as to face the opening edge on the back side of the three-way frame 2. A gap G is secured between the lower surface of the upper frame 2a of the three-way frame 2 and the upper surfaces of the doors 3a and 3b.
[0024]
A laterally slit-like keyhole 30 is formed in the upright wall 5 of the step portion 6 in one door 3 a so as to face the gap G. The keyhole 30 is formed so as to penetrate the upright wall 5 and communicate from the front surface to the back surface. And the pushing part 15 of the lock lever 10 in the lock mechanism 9 is hold | maintained so that it may arrange | position in the side part of the one end side of the said keyhole 30. FIG.
[0025]
Reference numeral 31 shown in FIG. 5 is a dedicated unlock key used when the lock mechanism 9 is manually unlocked. The unlock key 31 is operated with the grip portion 32 by bending a thin plate material such as metal at a substantially right angle. It is formed in an L shape having a portion 33. A U-shaped relief portion 33 a is cut out at one side edge of the operation portion 33.
[0026]
The width H of the operation portion 33 of the unlock key 31 is slightly smaller than the horizontally long dimension of the keyhole 30, the length L of the operation portion 33 is larger than the thickness of the door 3a, and the length L1 of the escape portion 33a is the keyhole. It is slightly larger than the depth dimension of 30.
[0027]
When unlocking the lock mechanism 9 manually, the grip portion 32 of the unlock key 31 is grasped by hand, and the operation portion 33 is inserted into the keyhole 30 from the elevator landing side through the gap G as shown in FIG. And the front-end | tip side is protruded to the back side of the door 3a.
[0028]
Then, the escape key 33a at the side edge of the operation part 33 of the unlock key 31 is aligned with the side wall of the key hole 30, and the unlock key 31 is slid horizontally in the rightward direction in FIG. By this sliding operation, one side edge of the operation portion 33 moves further outward from one end portion of the keyhole 30 and comes into contact with the pressing portion 15 of the lock lever 10 in the lock mechanism 9.
[0029]
As a result of this contact, the lock lever 10 is rotated counterclockwise in FIG. 3, and the engagement claw 16 is disengaged from the engagement body 18 by this rotation, and the lock mechanism 9 is unlocked. Therefore, in this state, the doors 3a and 3b can be manually opened from the elevator landing side and can enter the hoistway to proceed with maintenance and inspection.
[0030]
In such a configuration, the unnatural keyhole 30 is not exposed on the surface of the door 3a, and thus the surface of the door 3a facing the elevator landing side is clean in appearance and the design is improved.
[0031]
In order to unlock the lock mechanism 9, the operation portion 33 of the unlock key 31 is inserted into the keyhole 30, and the relief portion 33 a on the side edge of the operation portion 33 is aligned with the length section of the keyhole 30 in the depth direction. Therefore, even if a thin plate material such as a ruler is inserted into the keyhole 30 by mischief, the lateral sliding becomes impossible. Therefore, the unlocking operation of the lock mechanism 9 due to mischief can be prevented.
[0032]
FIG. 6 shows a second embodiment. In this embodiment, the horizontally long dimension of the keyhole 30 is longer than that in the first embodiment. That is, the horizontally long dimension of the keyhole 30 is sufficiently longer than the width H of the operation portion 33 of the unlock key 31 shown in FIG. As shown in FIG. 6A, the pressing portion 15 of the lock lever 10 in the lock mechanism 9 is disposed so as to face the end portion on the one end side of the key hole 30.
[0033]
On the back surface of the door 3a, as shown in FIG. 6B, a contact plate 35 for closing a part of the opening of the keyhole 30 can be detachably attached via a screw 36.
[0034]
Then, by attaching the abutting plate 35, a part of the opening of the keyhole 30 is closed so that the laterally long dimension of the keyhole 30 is slightly larger than the width H of the operation portion 33 of the unlock key 31. It can be specified.
[0035]
By the way, it is important for the lock mechanism 9 to prevent the unlocking operation by mischief using a thin plate material such as a ruler in normal times, but it is necessary to repeat the unlocking operation frequently during the installation period of the elevator, etc. Therefore, it is required that the operation is easy to some extent.
[0036]
Therefore, during the elevator installation work or the like, as shown in FIG. 6 (A), the work or the like is carried out with the contact plate 35 removed. In this case, since the horizontal dimension of the keyhole 30 is longer than the width dimension of the operation part 33 of the unlock key 31, the operation part 33 of the unlock key 31 is placed in the keyhole 30 when the lock mechanism 9 is unlocked. Inserting and projecting the front end of the door 3a to the back side of the door 3a, and simply sliding the operating portion 33 in the lateral direction in this state, the escape portion 33a at the side edge of the operating portion 33 in the depth direction of the keyhole 30 in particular. The lock mechanism 9 can be easily and efficiently unlocked by pressing the pressing portion 15 of the lock lever 10 in the lock mechanism 9 without requiring a cumbersome and troublesome operation to fit the length section.
[0037]
In addition, it is possible to insert a thin plate material such as another ruler into the keyhole 30 without using the unlock key 31 and slide it laterally to unlock the lock mechanism 9.
[0038]
When the installation work of the elevator is completed and the elevator is used in a normal state, a backing plate 35 is attached to the back surface of the door 3a with screws 36 as shown in FIG. 6B. In this state, the horizontally long dimension of the keyhole 30 is substantially shortened. Therefore, under this state, the operation portion 33 of the unlock key 31 is inserted into the keyhole 30 and the side edge of the operation portion 33 is relieved. The operation portion 33 is slid in the horizontal direction with the portion 33a aligned with the side edge of the abutting plate 35, and the lock mechanism 9 is unlocked. In this case, even if a thin plate material such as a ruler is inserted into the keyhole 30 by mischief, the lateral sliding is restricted by the contact plate 35, so that the unlocking operation of the lock mechanism 9 by mischief is impossible. Can be prevented.
[0039]
That is, according to the second embodiment, the unlocking operation of the lock mechanism 9 can be easily and efficiently performed during the installation work of the elevator, and the unlocking operation by mischief with respect to the lock mechanism 9 during normal use of the elevator. Operation can be prevented.
[0040]
7 to 10 show a third embodiment. In this embodiment, the doors 3a and 3b are provided with a hanger plate 39 at the upper back, and the hanger plate 39 in one door 3a is provided with the lock mechanism 9. A lock lever 40 is attached, and an engagement body 41 detachable from the lock lever 40 is attached to the back surface of the header case 8.
[0041]
The lock lever 40 is rotatably supported at its intermediate portion via a support shaft 42, has a hook-like engagement portion 43 at one end portion, and a pushing portion 44 at the other end portion. It engages with the engaging claw 45 of the engaging body 41 so that it can be engaged and disengaged.
[0042]
Further, an unlock lever 48 is attached to the back surface of the hanger plate 39 through a support shaft 49 so as to be rotatable. The unlock lever 48 is L-shaped, and the support shaft 49 is provided at a bent portion thereof. One end side with the support shaft 49 as a boundary is an operation portion 50 and the other end side is a receiving portion 51. The operation portion 50 comes into contact with the pressing portion 44 of the lock lever 40, the receiving portion 51 extends to the lower side of the hanger plate 39, and the side edge of the extended end is the rotational force due to the weight of the unlock lever 48. In contact with the stopper 52.
[0043]
The hanger plate 39 is formed with a horizontally elongated slit-like key hole 53 facing the gap G between the lower surface of the upper frame 2a of the three-way frame 2 and the upper surface of the door 3a. A receiving portion 51 of the unlocking lever 48 is disposed on the side portion.
[0044]
FIG. 10 shows an unlock key 31 used in this embodiment. In this unlock key 31, the length of a U-shaped escape portion 33a formed on one side edge of the operation portion 33 is shown. The dimension L2 is smaller than that of the unlock key 31 shown in FIG.
[0045]
When unlocking the lock mechanism 9, the grip portion 32 of the unlock key 31 shown in FIG. 10 is grasped by hand, and the operation portion 33 is passed through the gap G from the elevator hall landing side as shown by a chain line in FIG. The keyhole 53 is inserted into the keyhole 53, and the tip end of the keyhole 53 protrudes to the back side of the hanger plate 39, and the escape portion 33 a faces the side edge of the keyhole 53.
[0046]
Then, the unlock key 31 is slid horizontally in the right direction in FIG. At this time, since the escape portion 33 a of the operation portion 33 enters the side edge of the keyhole 53, one side edge of the operation portion 33 moves further to the outer side than one end portion of the keyhole 53, and the receiving portion in the unlock lever 48. 51 abuts.
[0047]
As a result of this contact, the unlock lever 48 rotates about the support shaft 49 in the counterclockwise direction in FIG. 9, and by this rotation, the pushing portion 44 of the lock lever 40 is moved downward by the operation portion 50 of the unlock lever 48. The locking lever 40 is rotated clockwise around the support shaft 42 by this pressing, the engaging portion 43 is disengaged from the engaging claw 45 of the engaging body 41, and the locking mechanism 9 is unlocked. Therefore, in this state, the doors 3a and 3b can be manually opened from the elevator landing side and can enter the hoistway to proceed with maintenance and inspection.
[0048]
Even in such a configuration, the unnatural keyhole 53 is not exposed on the surface of the door 3a, and thus the surface of the door 3a facing the elevator landing side is clean in appearance and the design is improved.
[0049]
In the third embodiment, by using the unlock lever 48, unlike the case of the first embodiment, the unlock key 48 is used even if the push portion 44 extends in the horizontal direction. The lock mechanism 9 can be unlocked by the operation of sliding 31 in the horizontal direction. Further, in the third embodiment, it is possible to adjust the turning operation force of the lock lever 40 by changing the length L of the operation unit 50 in the unlock lever 48.
[0050]
FIG. 11 shows a fourth embodiment. In this embodiment, the unlock lever 48 in the third embodiment is elastically urged clockwise by a spring 55.
[0051]
Under the locked state of the lock mechanism 9, as shown in FIG. 11A, the receiving portion 51 of the unlock lever 48 is elastically brought into contact with the stopper 52 by the urging force of the spring 55, and the operation portion 50. Is kept away from the pressing portion 44 of the lock lever 40 and in a non-contact state.
[0052]
When unlocking the lock mechanism 9, as shown in FIG. 11B, the operation portion 33 of the unlock key 31 is inserted into the keyhole 53 from the elevator landing side and slid rightward to unlock. The lever 48 is rotated counterclockwise in the drawing centering on the support shaft 49 against the spring 55.
[0053]
As a result of this rotation, the pressing portion 44 of the lock lever 40 is pressed downward by the operation portion 50 of the unlock lever 48, and by this pressing, the lock lever 40 rotates clockwise about the support shaft 42, and the engagement portion 43 is disengaged from the engagement claw 45 of the engagement body 41, and the lock mechanism 9 is unlocked. Therefore, in this state, the doors 3a and 3b are manually opened from the elevator landing side and enter the hoistway to perform maintenance. Work such as inspection can proceed.
[0054]
Incidentally, the lock mechanism 9 is provided with a switch mechanism S that electrically detects whether or not the elevator is locked during normal operation of the elevator, but the unlock lever 48 contacts the lock lever 40 of the lock mechanism 9. If so, vibrations of the unlock lever 48 during normal operation of the elevator may be transmitted to the switch mechanism S and cause malfunction.
[0055]
However, in the fourth embodiment, the unlock lever 48 is elastically biased by the spring 55, and the unlock lever 48 and the lock lever 40 of the lock mechanism 9 are kept in a non-contact state during normal operation of the elevator. Therefore, the vibration of the unlock lever 48 and the like is not transmitted to the lock mechanism 9, and therefore, it is possible to prevent the malfunction of the switch mechanism S provided in the lock mechanism 9.
[0056]
In each of the above-described embodiments, a double-opening type door device in which a pair of doors move in opposite directions to open and close the entrance / exit is targeted, but a plurality of doors overlap each other on a trajectory at different speeds in the same direction. The present invention can also be applied to a door device of a type that moves to open and close the doorway, a single door type door device that moves a single door to the left and right to open and close the doorway, and the like.
[0057]
【The invention's effect】
As described above, according to the present invention, even if the door surface provided at the entrance on the elevator landing side and the surface of the upper frame of the three-way frame are substantially flush with each other, it is not exposed to the surface. Without providing an attractive keyhole, the lock mechanism can be easily unlocked manually from the elevator landing side while maintaining good design.
[Brief description of the drawings]
FIG. 1 is a front view showing an elevator door unlocking device according to a first embodiment of the present invention;
FIG. 2 is a side view of the unlocking device.
FIG. 3 is a front view showing a state when the unlocking device is operated.
FIG. 4 is a front view showing a state when the unlocking device is operated.
FIG. 5 is a perspective view showing an unlock key used in the unlock device.
FIG. 6 is a front view showing an elevator door unlocking device according to a second embodiment of the present invention.
FIG. 7 is a front view showing an elevator door unlocking device according to a third embodiment of the present invention;
FIG. 8 is a side view of the unlocking device.
FIG. 9 is a front view showing a state when the unlocking device is operated.
FIG. 10 is a perspective view showing an unlock key used in the unlock device.
FIG. 11 is a front view showing an elevator door unlocking device according to a fourth embodiment of the present invention;
FIG. 12 is a front view showing the entrance of the elevator platform.
FIG. 13 is a side view showing a conventional elevator door unlocking device.
FIG. 14 is a front view of the unlocking device.
FIG. 15 is a side view showing a state during operation of the unlocking device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Entrance / exit 2 ... Three-way frame 3a, 3b ... Door 9 ... Lock mechanism 10 ... Lock lever 14 ... Engagement part 15 ... Push part 18 ... Engagement body 30 ... Key hole 31 ... Unlock key 35 ... Stopper plate 39 ... Hanger plate 40 ... Lock lever 41 ... Engagement body 48 ... Unlock lever 52 ... Stopper 53 ... Key hole 55 ... Spring

Claims (3)

In the unlocking device that unlocks the lock mechanism that locks the door provided at the entrance on the elevator landing side constituted by a three-way frame, by manual operation using the unlock key from the elevator landing side,
In the unlocking device, the surface of the upper frame of the three-way frame and the surface of the door are substantially flush with each other, and the unlock key is a gap between the lower surface of the upper frame of the three-way frame and the upper surface of the door. Can be inserted from the elevator landing side to the back side of the door, and the unlocking mechanism can be unlocked by sliding the unlock key inserted laterally,
The door is provided with a horizontally-slit keyhole facing the gap, and the unlock key can be inserted through the keyhole to the back side of the door,
The unlock key has an operation part having a predetermined width, and a relief part having a length larger than the depth dimension of the key hole is cut out at a side edge of the operation part, and the key hole is the operation part of the unlock key. The lateral dimension of the key hole is slightly larger than the width dimension of the operation portion of the unlocking key. An elevator unlocking device characterized in that a specified backing plate can be attached and detached .   The elevator unlocking device according to claim 1, wherein the lock mechanism is provided with an unlock lever, and a slide operation of the unlock key is transmitted to the lock mechanism via the unlock lever. .   The unlock lever is normally held in a non-contact state with the lock mechanism by the urging force of the elastic member, and when the unlock key is inserted and slid in the lateral direction, the unlock lever is moved to the elastic member. The elevator unlocking device according to claim 2, wherein the unlocking device is operated against the locking mechanism to contact the locking mechanism, and the sliding operation of the unlocking key is transmitted to the locking mechanism by the contact.

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