Elevator door unlocking device

Abstract

To provide an unlocking device for facilitating an unlocking operation for an elevator door which is unlocked by pushing an unlocking member from the landing side through a keyhole provided in a door panel.SOLUTION: An unlocking device 12 includes a key portion 13, a handle portion 14, and a guide portion 15. A first elongated hole 18 is provided along the longitudinal direction between a first protrusion 17 and an insertion end 16 at both longitudinal ends of the key portion 13. The insertion end 16 is inserted into a keyhole 10 so as to be able to push an unlocking member 11. The first protrusion 17 is rotatably held between an operating portion 19 and a support shaft 20 at both longitudinal ends of the handle portion 14. The guide portion 15 has a link portion 22 and a spatula portion 23 rotatably supported by the support shaft 20. The link portion 22 has a second protrusion 24 at its tip, which is held movably along the first elongated hole 18. The spatula portion 23 has a flat portion 25 at its tip, which is inserted into the gap between a frame portion and a door panel 8.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to an elevator door lock unlocking device. [Background technology]

[0002] Patent Document 1 discloses an example of an unlocking device for elevator door locks. The unlocking device includes a cylindrical handle, a rotation mechanism provided at one end of the handle, a key fixing part rotatably provided at the other end of the handle, a rotation force transmission means provided within the handle for transmitting the rotation force of the rotation mechanism to the key fixing part, and an operating part provided in the rotation mechanism for applying a rotation force around the axis of the rotation mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 235172 Summary of the Invention [Problem to be solved by the invention]

[0004] The unlocking device of Patent Document 1 unlocks the door lock by inserting an unlocking key fixed to a key fixing part into a keyhole and rotating it. Here, elevator landing doors are sometimes provided with door locks that are unlocked by pushing an unlocking member from the landing side through a keyhole provided in the door panel. The keyhole of the door lock is sometimes provided in the upper part of the door panel. For such door locks, if the operator performing the unlocking operation is small, it may be difficult to apply sufficient force to push the unlocking member through the keyhole, making it difficult to perform the unlocking operation.

[0005] The present disclosure is directed to solving such problems. The present disclosure provides an unlocking device that makes it easier to perform an unlocking operation even for elevator door locks that are unlocked by pushing an unlocking member from the landing side through a keyhole provided in the door panel. [Means for solving the problem]

[0006] The unlocking device according to the present disclosure is a door lock unlocking device in which the lock of a door panel of a landing door that opens and closes on the hoistway side from a frame portion provided to form the edge of a landing entrance leading from an elevator landing to a hoistway is unlocked by pushing an unlocking member from the landing side through a keyhole provided in the door panel, the unlocking device having an insertion end at one end in the longitudinal direction that is inserted into the keyhole so as to be able to push the unlocking member, a first protrusion at the other end in the longitudinal direction, and a locking member extending between the first protrusion and the insertion end along the longitudinal direction. The locking mechanism includes a key portion having a first long hole, a handle portion having an operating portion at one longitudinal end and a support shaft at the other longitudinal end, and rotatably holding the first protrusion between the operating portion and the support shaft, a link portion having a second protrusion at its tip which is held movably along the first long hole by the key portion and is rotatably supported by the support shaft, and a guide portion having a spatula portion having a flat portion at its tip which is inserted into the gap between the frame portion and the door panel and is rotatably supported by the support shaft. Effect of the Invention

[0007] According to the elevator door lock unlocking device of the present disclosure, unlocking operations can be performed more easily even for door locks that are unlocked by pushing the unlocking member from the landing side through a keyhole provided in the door panel. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an oblique view of an elevator according to a first embodiment. [Diagram 2] FIG. 2 is a front view of the keyhole of the elevator door lock in accordance with embodiment 1. [Diagram 3] FIG. 2 is a cross-sectional view of a keyhole of an elevator door lock in accordance with embodiment 1. [Figure 4] FIG. 1 is a side view of an unlocking device according to a first embodiment. [Diagram 5] FIG. 1 is a side view of an unlocking device according to a first embodiment. [Figure 6] FIG. 1 is a front view of an unlocking device according to a first embodiment. [Figure 7] 1A to 1C are diagrams illustrating an example of unlocking a door lock using the unlocking device according to the first embodiment. [Figure 8] 1A to 1C are diagrams illustrating an example of unlocking a door lock using the unlocking device according to the first embodiment. [Figure 9] 1A to 1C are diagrams illustrating an example of unlocking a door lock using the unlocking device according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The embodiments for carrying out the subject of the present disclosure will be described with reference to the accompanying drawings. In each drawing, the same or corresponding parts are given the same reference numerals, and duplicated descriptions are appropriately simplified or omitted. Note that the subject of the present disclosure is not limited to the following embodiments, and any component of the embodiment may be modified or omitted within the scope of the gist of the present disclosure.

[0010] Embodiment 1 FIG. 1 is a perspective view of an elevator 1 according to the first embodiment.

[0011] The elevator 1 is applied to a building having a plurality of floors. In the building, a hoistway 2 for the elevator 1 is provided. The hoistway 2 is a vertically long space that spans the plurality of floors. A car 3 of the elevator 1 travels vertically through the hoistway 2 to transport users between the plurality of floors. At each floor of the building, a landing 4 adjacent to the hoistway 2 is provided. At the landing 4, a landing entrance / exit 5 is provided. The landing entrance / exit 5 is an opening that leads from the landing 4 to the hoistway 2. At the landing 4, a jamb 6 is provided. The jamb 6 is an example of a frame portion that forms the edge of the landing entrance / exit 5. The frame portion may include a fascia board or the like. The jamb 6 may be formed integrally with the wall surface of the landing 4 or the like. At the landing entrance / exit 5 of the landing 4, a landing door 7 is provided. The landing door 7 includes a door panel 8. The door panel 8 is a plate-like member that divides the landing 4 and the elevator shaft 2 at the landing entrance 5. The door panel 8 is disposed on the elevator shaft 2 side of the jamb 6. The door panel 8 provided at the landing 4 opens and closes on the elevator shaft 2 side of the jamb 6 so that passengers can get on and off the car 3 when the car 3 stops at the floor of the landing 4. The door panel 8 is disposed with a gap between the end face of the jamb 6 on the elevator shaft 2 side so that the door panel 8 can be opened and closed smoothly. The door panel 8 provided at the landing 4 is locked by a door lock 9 so as not to open or close when the car 3 is not at the floor of the landing 4 under normal circumstances. The door lock 9 is disposed, for example, on the elevator shaft 2 side of the door panel 8.

[0012] For example, in the event that a user becomes trapped in the car 3 during an earthquake, the door lock 9 of the door panel 8 may be manually unlocked by an operator. The operator may be, for example, a maintenance worker who performs maintenance and inspection of the elevator 1, or a manager of the building in which the elevator 1 is installed. The operation to unlock the door lock 9 is performed through a keyhole 10 from the landing 4 side. The keyhole 10 for the door lock 9 is provided in the door panel 8. The keyhole 10 is provided in the upper part of the door panel 8.

[0013] FIG. 2 is a front view of the keyhole 10 of the door lock 9 of the elevator 1 according to the first embodiment.

[0014] The shape of the keyhole 10 is, for example, a shape including one or both of a curve and a broken line. The shape of the keyhole 10 is, for example, an inverted S-shape, which is a curve having two curved portions.

[0015] FIG. 3 is a cross-sectional view of the keyhole 10 of the door lock 9 of the elevator 1 according to the first embodiment. FIG. 3 shows a cross-sectional view of a portion including a keyhole 10 of a door panel 8, taken along a vertical plane perpendicular to the left-right direction when looking at the elevator shaft 2 from the landing 4.

[0016] The door lock 9 includes an unlocking member 11. The unlocking member 11 is disposed on the hoistway 2 side of the keyhole 10. When the unlocking member 11 is pushed toward the hoistway 2 side from the landing 4 side through the keyhole 10, the door lock 9 is unlocked, for example, by disengaging a latch that restricts the opening and closing of the door panel 8. Under normal circumstances, the unlocking member 11 may be pressed toward the landing 4 side by, for example, the elastic force of a spring (not shown). In this case, an operator performing an unlocking operation unlocks the door lock 9 by pushing the unlocking member 11 toward the hoistway 2 side from the landing 4 side through the keyhole 10 against the elastic force. When unlocking the door lock 9, an unlocking tool (not shown in FIG. 3) is used.

[0017] 4 and 5 are side views of the unlocking tool 12 according to the first embodiment. In this example, the unlocking tool 12 is transformed into one of a number of states including a use state and a storage state. The use state is a state in which an unlocking operation is performed using the unlocking tool 12. The storage state is a state in which the unlocking tool 12 is not used, such as when it is stored or transported. In FIG. 4 the unlocking device 12 is shown in use.

[0018] The unlocking device 12 includes a key portion 13, a handle portion 14, and a guide portion 15.

[0019] The key portion 13 is, for example, a rod-shaped or plate-shaped member that is long in one direction. An insertion end 16 is provided at one end in the longitudinal direction of the key portion 13. A first protrusion 17 is provided at the other end in the longitudinal direction of the key portion 13. The insertion end 16 is a portion that is inserted into the keyhole 10 so that the unlocking member 11 can be pushed in from the landing 4 side. The cross-sectional shape of the insertion end 16 perpendicular to the longitudinal direction of the key portion 13 corresponds to a part or the entire shape of the keyhole 10. For example, when the shape of the keyhole 10 is an inverted S-shaped shape having multiple curved portions, the cross-sectional shape of the insertion end 16 perpendicular to the longitudinal direction of the key portion 13 is an inverted S-shaped shape that corresponds to the entire shape of the keyhole 10. Alternatively, the cross-sectional shape of the insertion end 16 perpendicular to the longitudinal direction of the key portion 13 may be a curved shape having a single curved portion that corresponds to a part of the inverted S-shaped shape of the keyhole 10. A first oblong hole 18 is provided in the key portion 13 between the first protrusion 17 and the insertion end 16. The first oblong hole 18 is an oblong hole that is aligned along the longitudinal direction of the key portion 13.

[0020] The handle 14 is, for example, a rod-like or plate-like member that is long in one direction. An operating part 19 is provided at one end of the handle 14 in the longitudinal direction. A support shaft 20 is provided at the other end of the handle 14 in the longitudinal direction. The operating part 19 is a part that an operator operates the unlocking device 12 by hand. The operating part 19 is, for example, a handle. A second elongated hole 21 is provided in the handle 14 between the operating part 19 and the support shaft 20. The handle 14 rotatably holds the first protrusion 17 of the key part 13 in the second elongated hole 21. The first protrusion 17 is held movably along the second elongated hole 21. The second elongated hole 21 is a deformed elongated hole having a first portion 21a on the operating part 19 side and a second portion 21b on the support shaft 20 side. The first portion 21a is a portion along the longitudinal direction of the handle 14. The second portion 21b is provided on the opposite side of the insertion end 16 of the key portion 13 from the first portion 21a and is offset from the center line of the first portion 21a. The second portion 21b may be provided at an angle with respect to the longitudinal direction of the handle portion 14. The second portion 21b may be curved.

[0021] The guide portion 15 includes a link portion 22 and a spatula portion 23. In this example, the link portion 22 and the spatula portion 23 are formed separately as individual members.

[0022] The link portion 22 is, for example, a rod-like or plate-like member that is long in one direction. The link portion 22 is a portion that connects the support shaft 20 at the tip of the handle portion 14 and the key portion 13. A second protrusion 24 is provided at one longitudinal end of the link portion 22. The second protrusion 24 is held in the first elongated hole 18 of the key portion 13 so as to be rotatable and movable along the first elongated hole 18. The link portion 22 is rotatably supported by the support shaft 20 of the handle portion 14. In this example, the end of the link portion 22 opposite to the second protrusion 24 is supported by the support shaft 20.

[0023] The spatula 23 is, for example, a rod-like or plate-like member that is long in one direction. A flat portion 25 is provided at one end in the longitudinal direction of the spatula 23. The flat portion 25 is a flat portion parallel to a plane including the longitudinal direction of the spatula 23 and the axial direction of the support shaft 20 of the handle 14. The flat portion 25 is inserted into a gap between a frame portion such as the jamb 6 and the door panel 8. The thickness of the flat portion 25 is thinner than the gap between a frame portion such as the jamb 6 and the door panel 8. The spatula 23 is rotatably supported by the support shaft 20 of the handle 14. In this example, the end of the spatula 23 opposite to the flat portion 25 is supported by the support shaft 20.

[0024] In this example, the rotation of the spatula part 23 toward the insertion end 16 of the key part 13 with respect to the link part 22 is restricted by, for example, a stopper provided on the support shaft 20. At this time, the rotation of the spatula part 23 toward the opposite side of the insertion end 16 of the key part 13 with respect to the link part 22 is not restricted.

[0025] In the use state, the longitudinal directions of the link portion 22 and the spatula portion 23 are parallel to each other. The longitudinal direction of the link portion 22 and the spatula portion 23 at this time is sometimes referred to as the longitudinal direction of the guide portion 15. In the use state, the longitudinal direction of the guide portion 15 is perpendicular to the longitudinal direction of the key portion 13. At this time, the second projection 24 of the link portion 22 is on the insertion end 16 side of the first oblong hole 18. Also, the first projection 17 of the key portion 13 is in the second portion 21b of the second oblong hole 21.

[0026] When changing from the use state to the storage state, the unlocking device 12 deforms so that the longitudinal direction of the guide part 15 and the longitudinal direction of the key part 13 become parallel to each other. At this time, the second protrusion 24 of the link part 22 moves from the insertion end 16 side of the first oblong hole 18 to the first protrusion 17 side. In addition, the first protrusion 17 of the key part 13 moves from the second part 21b to the first part 21a of the second oblong hole 21, and moves to the operating part 19 side of the second oblong hole 21.

[0027] In FIG. 5, the unlocking device 12 is shown in a stored state.

[0028] In the stored state, the longitudinal directions of the key portion 13, the handle portion 14, the link portion 22, and the spatula portion 23 are parallel to one another. The spatula portion 23 may be folded toward the operating portion 19 of the handle portion 14 by rotating about the support shaft 20.

[0029] FIG. 6 is a front view of the unlocking tool 12 according to the first embodiment. In FIG. 6, the unlocking device 12 is shown in a stored state.

[0030] In the unlocking tool 12, the spatula portion 23 is disposed on the opposite side of the link portion 22 and the key portion 13 with respect to the handle portion 14.

[0031] 7 to 9 are diagrams illustrating an example of unlocking the door lock 9 using the unlocking tool 12 according to the first embodiment. 7 to 9, cross-sectional views of a portion including keyhole 10 of door panel 8 are shown along a vertical plane perpendicular to the left-right direction when looking at elevator shaft 2 from landing 4. FIG.

[0032] When performing an unlocking operation, an operator at the landing 4 first transforms the unlocking device 12 into a usable state as shown in FIG.

[0033] Next, as shown in Figure 8, the operator holds the operating portion 19 of the handle 14 and inserts the flat portion 25 of the spatula 23 from below into the gap between a frame portion such as the jamb 6 and the door panel 8. At this time, the operator inserts the insertion end 16 of the key portion 13 into the keyhole 10 from the landing 4 side. The insertion end 16 of the key portion 13 comes into contact with the unlocking member 11 of the door lock 9.

[0034] Next, as shown in FIG. 9, the operator holds the operating part 19 below the keyhole 10 and pushes it from the landing 4 side toward the hoistway 2 side. At this time, the entire handle 14 rotates with the support shaft 20 as a fulcrum. Since the first protrusion 17 on the opposite side of the insertion end 16 of the key part 13 is in the second part 21b of the second oblong hole 21, the key part 13 is pushed from the landing 4 side toward the hoistway 2 side while being prevented from shifting relative to the handle part 14. In addition, since the second protrusion 24 of the link part 22 is held in the first oblong hole 18 of the key part 13, the key part 13 is pushed straight from the landing 4 side toward the hoistway 2 side while being prevented from shifting in the up-down or left-right directions.

[0035] During the unlocking operation, a reaction force toward the landing 4 side is applied from the unlocking member 11 to the unlocking device 12 through the insertion end 16 of the key portion 13. Also, a reaction force toward the hoistway 2 side is applied to the unlocking device 12 from the end face of the jamb 6 on the hoistway 2 side through the flat portion 25 of the spatula portion 23. The reaction force from the unlocking member 11 toward the landing 4 side can be received by the reaction force toward the hoistway 2 side from the jamb 6, so that the operator can stably push the unlocking member 11 with the insertion end 16 while resisting the elastic force of a spring or the like. Also, the unlocking member 11 acts as a lever with the support shaft 20 as a fulcrum, the operating portion 19 as a force point, and the insertion end 16 as a point of action, and since the operating portion 19 is located below the keyhole 10, even if the operator is small in stature, it is easy to apply a sufficient force to push the unlocking member 11 through the keyhole 10.

[0036] In addition, because the rotation of the spatula part 23 toward the insertion end 16 of the key part 13 with respect to the link part 22 is restricted, bending of the support shaft 20 of the spatula part 23 and the link part 22 is suppressed, and the support shaft 20 is less likely to move away from the door panel 8. This allows the operator to push in the unlocking member 11 more stably.

[0037] As described above, the unlocking tool 12 according to the first embodiment includes the key portion 13, the handle portion 14, and the guide portion 15. The key portion 13 has an insertion end 16 at one end in the longitudinal direction and a first protrusion 17 at the other end. The insertion end 16 is a portion that is inserted into the keyhole 10 so as to push the unlocking member 11. The key portion 13 has a first oblong hole 18 along the longitudinal direction between the first protrusion 17 and the insertion end 16. The handle portion 14 has an operating portion 19 at one end in the longitudinal direction and a support shaft 20 at the other end. The handle portion 14 rotatably holds the first protrusion 17 between the operating portion 19 and the support shaft 20. The guide portion 15 has a link portion 22 and a spatula portion 23. The link portion 22 has a second protrusion 24 at its tip, which is held by the key portion 13 so as to be movable along the first oblong hole 18. The spatula portion 23 has a flat portion 25 at its tip which is inserted into the gap between a frame portion such as jamb 6 and the door panel 8. The link portion 22 and the spatula portion 23 are rotatably supported by the support shaft 20.

[0038] With this configuration, the unlocking member 11 acts as a lever with the support shaft 20 as the fulcrum, the operating part 19 as the force point, and the insertion end 16 as the point of action, allowing the door lock 9 to be unlocked by the operating part 19 located below the keyhole 10. This makes it easier for an operator, even if he or she is small, to apply sufficient force to push the unlocking member 11 through the keyhole 10, making the unlocking operation easier.

[0039] Furthermore, a second elongated hole 21 is provided in the handle 14 between the operating part 19 and the support shaft 20. The second elongated hole 21 is a modified elongated hole having a first portion 21a on the operating part 19 side and a second portion 21b on the support shaft 20 side. The first portion 21a is a portion that extends along the longitudinal direction of the handle 14. The second portion 21b is a portion that is provided on the opposite side of the insertion end 16 of the key part 13 with respect to the first portion 21a and deviated from the center line of the first portion 21a. The handle 14 holds the first protrusion 17 of the key part 13 movably along the second elongated hole 21.

[0040] With this configuration, when the unlocking tool 12 is in the use state, the first protrusion 17 is in the second portion 21b of the second oblong hole 21, so that the key portion 13 is prevented from shifting relative to the handle portion 14. This improves the stability of the pushing of the unlocking member 11. Also, when the unlocking tool 12 changes from the use state to the storage state, the first protrusion 17 moves from the second portion 21b to the first portion 21a of the second oblong hole 21, so that the longitudinal directions of the key portion 13, the handle portion 14, the link portion 22, and the spatula portion 23 can be made parallel to one another. This allows the unlocking tool 12 to be stored in a compact state.

[0041] The link portion 22 and the spatula portion 23 are formed separately. The link portion 22 and the spatula portion 23 are each supported rotatably around the support shaft 20.

[0042] With this configuration, in the stored state, the spatula part 23 can be folded toward the operating part 19 side of the handle part 14 by rotating the spatula part 23 around the support shaft 20. This allows the unlocking tool 12 to be stored more compactly.

[0043] Furthermore, the rotation of the spatula portion 23 toward the insertion end 16 of the key portion 13 is restricted with respect to the link portion 22 .

[0044] With this configuration, when in use, bending of the spatula portion 23 and the link portion 22 around the support shaft 20 is suppressed, thereby making it possible to more stably perform the unlocking operation of the door lock 9.

[0045] Furthermore, when the shape of the keyhole 10 includes either or both of a curved line and a broken line, the cross-sectional shape of the insertion end 16 perpendicular to the longitudinal direction of the key portion 13 matches the overall shape of the keyhole 10.

[0046] With this configuration, the insertion end 16 that is inserted into the keyhole 10 becomes more stable, and the unlocking operation of the door lock 9 can be performed more stably.

[0047] In the guide portion 15, the link portion 22 and the spatula portion 23 may be integrally formed. In this case, the guide portion 15 is, for example, a single member having the second projection 24 at one end on the link portion 22 side in the longitudinal direction and the flat portion 25 at the other end on the spatula portion 23 side. In this case, the guide portion 15 is rotatably supported by the support shaft 20 of the handle portion 14 at an intermediate portion between the second projection 24 and the flat portion 25. With this configuration, bending of the spatula portion 23 and the link portion 22 around the support shaft 20 is suppressed in the use state. This allows the door lock 9 to be unlocked more stably.

[0048] Furthermore, the spatula part 23 may be replaceable. In this case, for example, the spatula part 23 may be replaced with a different type of spatula part 23 having a different length from the part supported by the support shaft 20 to the flat part 25. Alternatively, the length of the spatula part 23 from the part supported by the support shaft 20 to the flat part 25 may be adjustable. In this case, the length is adjusted in the spatula part 23 by, for example, a long hole. With this configuration, the unlocking device 12 can be applied to a plurality of types of elevators 1 having different lengths from the bottom end of a frame part such as the jamb 6 to the keyhole 10.

[0049] To summarize the above explanation, possible configurations of the technology according to the present disclosure include the configurations listed below as appendices. (Appendix 1) This is a door lock unlocking device in which a lock on a door panel of a landing door that opens and closes on the hoistway side from a frame portion provided so as to form the edge of a landing entrance leading from an elevator landing to a hoistway is unlocked by pushing an unlocking member from the landing side through a keyhole provided in the door panel, a key part having an insertion end at one end in a longitudinal direction that is inserted into the keyhole so as to push the unlocking member, a first protrusion at the other end in the longitudinal direction, and a first oblong hole extending along the longitudinal direction between the first protrusion and the insertion end; a handle portion having an operating portion at one end in a longitudinal direction and a support shaft at the other end in the longitudinal direction, the handle portion rotatably holding the first protrusion between the operating portion and the support shaft; a link portion having a second protrusion at a tip end thereof, the second protrusion being movably held along the first long hole by the key portion, the link portion being rotatably supported by the support shaft, and a spatula portion having a flat portion at a tip end thereof, the flat portion being inserted into a gap between the frame portion and the door panel, the spatula portion being rotatably supported by the support shaft; An unlocking device comprising: (Appendix 2) A second slot is provided in the handle between the operating portion and the support shaft, the second elongated hole is a deformed elongated hole having a first portion along the longitudinal direction of the handle portion on the operation portion side, and a second portion on the support shaft side, the second portion being offset from a center line of the first portion on an opposite side to the insertion end of the key portion with respect to the first portion; The handle portion holds the first protrusion movably along the second slot. An unlocking device as described in Appendix 1. (Appendix 3) The link portion and the spatula portion are formed separately and are each rotatably supported around the support shaft. 2. An unlocking device as described in Appendix 1 or Appendix 2. (Appendix 4) The spatula portion is regulated in rotation of the key portion toward the insertion end side with respect to the link portion. An unlocking device as described in Appendix 3. (Appendix 5) The link portion and the spatula portion are integrally formed. 2. An unlocking device as described in Appendix 1 or Appendix 2. (Appendix 6) The spatula part is replaceable. An unlocking device according to any one of claims 1 to 4. (Appendix 7) In the spatula portion, the length of the flat portion from the support shaft is adjustable. An unlocking device according to any one of claims 1 to 4. (Appendix 8) When the shape of the keyhole includes one or both of a curve and a broken line, The cross-sectional shape of the insertion end perpendicular to the longitudinal direction of the key portion corresponds generally to the shape of the keyhole. An unlocking device according to any one of claims 1 to 7. [Explanation of symbols]

[0050] 1 elevator, 2 hoistway, 3 car, 4 landing, 5 landing entrance / exit, 6 jamb, 7 landing door, 8 door panel, 9 door lock, 10 keyhole, 11 unlocking member, 12 unlocking device, 13 key portion, 14 handle portion, 15 guide portion, 16 insertion end, 17 first protrusion, 18 first oblong hole, 19 operation portion, 20 support shaft, 21 second oblong hole, 21a first portion, 21b second portion, 22 link portion, 23 spatula portion, 24 second protrusion, 25 flat portion

Claims

1. This is a door lock unlocking device in which a lock on a door panel of a landing door that opens and closes on the hoistway side from a frame portion provided so as to form the edge of a landing entrance leading from an elevator landing to a hoistway is unlocked by pushing an unlocking member from the landing side through a keyhole provided in the door panel, a key part having an insertion end at one end in a longitudinal direction that is inserted into the keyhole so as to push the unlocking member, a first protrusion at the other end in the longitudinal direction, and a first oblong hole extending along the longitudinal direction between the first protrusion and the insertion end; a handle portion having an operating portion at one end in a longitudinal direction and a support shaft at the other end in the longitudinal direction, the handle portion rotatably holding the first protrusion between the operating portion and the support shaft; a guide portion including a link portion having a second protrusion at a tip end thereof, the second protrusion being movably held along the first oblong hole by the key portion, the link portion being rotatably supported by the support shaft, and a spatula portion having a flat portion at a tip end thereof, the flat portion being inserted into a gap between the frame portion and the door panel, the spatula portion being rotatably supported by the support shaft; An unlocking device comprising:

2. A second slot is provided in the handle between the operating portion and the support shaft, the second oblong hole is a deformed oblong hole having a first portion along the longitudinal direction of the handle portion on the operating portion side, and a second portion on the support shaft side, the second portion being offset from a center line of the first portion on an opposite side to the insertion end of the key portion with respect to the first portion, The handle portion holds the first projection movably along the second slot. The unlocking tool according to claim 1.

3. The link portion and the spatula portion are formed separately and are each rotatably supported around the support shaft. The unlocking tool according to claim 1 or 2.

4. The spatula portion is regulated in rotation of the key portion toward the insertion end side with respect to the link portion. The unlocking tool according to claim 3.

5. The link portion and the spatula portion are integrally formed. The unlocking tool according to claim 1 or 2.

6. The spatula part is replaceable. The unlocking tool according to claim 1 or 2.

7. In the spatula portion, the length of the flat portion from the support shaft is adjustable. The unlocking tool according to claim 1 or 2.

8. When the shape of the keyhole includes one or both of a curve and a broken line, The cross-sectional shape of the insertion end perpendicular to the longitudinal direction of the key portion corresponds generally to the shape of the keyhole. The unlocking tool according to claim 1 or 2.

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