Elevator

Abstract

To provide an elevator which enables the number of components to be reduced and unlocking work to be safely and easily carried out.SOLUTION: This elevator comprises: a building side door; and a landing side locking mechanism 30 for locking the building side door so as to be unlockable in its closed state. The landing side locking mechanism 30 includes a rotary shaft 35, a first hook member 31, a second hook member 36, and a fixed hoo member 26. The first hook member 31 is rotatably supported by the rotary shaft 35, and provided with a first engagement part 31a. The second hook member 36 is fixed to the first hook member 31, and provided with a second engagement part 36c. The fixed hook member 26 is engaged with the first and second engagement parts 31a and 36a so as to be unlockable. The second hook member 36 includes lever pieces 36a and 36b that rotate the first and second hook members 31 and 36 so as to rotate about the rotary shaft 35 when an unlock key 41 is inserted.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to an elevator.

Background Art

[0002] Conventionally, a landing-side locking mechanism for locking and unlocking the opening and closing operation has been provided on the building-side door provided on the landing side of an elevator in order to prevent passengers from falling into the hoistway. During inspection work, this landing-side locking mechanism is unlocked and the building-side door is opened. Further, in order to prevent the worker from falling into the hoistway, after the building-side door is opened by a predetermined distance, it is necessary to check whether the car has stopped at a predetermined position.

[0003] As such a landing-side locking mechanism, for example, there is one described in Patent Document 1. Patent Document 1 describes a technique including a first door locking device and a second door locking device. The first door locking device includes a first hook having a first concave portion and a first hook receiving portion with which the first concave portion engages. The second door locking device includes a second hook having a second concave portion and a second hook receiving portion with which the second concave portion engages.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the technique described in Patent Document 1 has a problem that, in order to unlock the building-side door during inspection work, it is necessary to release two door locking devices, which not only makes the unlocking work extremely complicated but also increases the number of parts.

[0006] An object of the present invention is to provide an elevator that takes into account the above problems, reduces the number of parts, and enables the unlocking operation to be performed safely and easily.

Means for Solving the Problems

[0007] To solve the above problems and achieve the object, the elevator includes a building-side door provided at the entrance of the landing where the car stops in a building structure, and a landing-side locking mechanism that locks the building-side door in a closed state and can be unlocked. The landing-side locking mechanism has a rotating shaft provided on the building-side door, a first hook member, a second hook member, and a fixed hook member. The first hook member is rotatably supported by the rotating shaft and is provided with a first engaging portion. The second hook member is fixed to the first hook member and is provided with a second engaging portion. The fixed hook member is engageable with the first engaging portion and the second engaging portion in an unlockable manner. And the second hook member has a lever piece that rotates the first hook member and the second hook member around the rotating shaft when an unlocking key is inserted.

Effects of the Invention

[0008] According to the elevator having the above configuration, the number of parts can be reduced, and the unlocking operation can be performed safely and easily.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying out the Invention

[0010] Hereinafter, an elevator according to an exemplary embodiment will be described with reference to FIGS. 1 to 10. In each figure, common members are denoted by the same reference numerals.

[0011] 1. First Exemplary Embodiment 1-1. Configuration of Elevator First, the configuration of the elevator according to the first exemplary embodiment (hereinafter referred to as "this example") will be described with reference to FIG. 1. FIG. 1 is a schematic configuration diagram showing a configuration example of the elevator of this example.

[0012] As shown in FIG. 1, the elevator 1 of this example moves up and down within a hoistway 110 formed in a building structure. The elevator 1 includes a car 120 for carrying people and goods, a rope 130, a counterweight 140, a hoisting machine 100, and a control unit 50. The hoistway 110 is formed in the building structure, and a machine room 160 is provided at its top.

[0013] The hoist 100 is arranged in the machine room 160 and raises and lowers the car 120 by winding the rope 130 around it. Also, near the hoist 100, a deflecting pulley 150 on which the rope 130 is mounted is provided. Further, in the machine room 160, a control unit 50 is installed. The control unit 50 is connected to the car 120 so that information can be transmitted and received by wire or wirelessly.

[0014] The car 120 is connected to the counterweight 140 via the rope 130 and moves up and down in the hoistway 110. Also, at the landing 201 where the car 120 stops on each floor of the building structure, an entrance / exit 202 for people and objects to enter and exit the car 120 is provided.

[0015] The car 120 has a car compartment 121 where people and objects get on and off, a pair of car side doors 124, 124, a car side door unit 122, and a car side door sill 123. An opening is provided on one side of the car compartment 121, and people and objects enter and exit through this opening.

[0016] The car side door unit 122 is provided at the upper end in the vertical direction at the opening of the car compartment 121, and the car side door sill 123 is provided at the lower end in the vertical direction at the opening of the car compartment 121. The car side door sill 123 is provided with guide grooves for guiding the opening and closing of the pair of car side doors 124, 124. And the pair of car side doors 124, 124 are supported by the car side door unit 122 and the car side door sill 123 so as to be openable and closable. Also, the car side door 124 is provided with a car side engaging element that engages with a landing side engaging element 34 described later.

[0017] FIG. 2 is a front view showing the state of the entrance / exit 202 on each floor as seen from the car 120 side. As shown in Fig. 2, at the entrance / exit 202, there are provided a pair of building-side doors 11, 11, a building-side door unit 12, a building-side door sill 13, and a platform-side locking mechanism 30. The building-side door unit 12 is provided at the upper end in the vertical direction of the entrance / exit 202, and the building-side door sill 13 is provided at the lower end in the vertical direction of the entrance / exit 202. The building-side door sill 13 is provided with guide grooves for guiding the opening and closing of the pair of building-side doors 11, 11.

[0018] The building-side door unit 12 has a building-side door rail (not shown), a pulley, a transmission belt, and a fixed hook member 26. The building-side door rail extends along the opening and closing direction of the pair of building-side doors 11, 11 in parallel with the horizontal direction in the building-side door unit 12. The pulleys are arranged at both ends of the upper end in the vertical direction of the building-side door unit 12. And a transmission belt is wound around the pulleys. The transmission belt is formed in an endless shape with both ends in its longitudinal direction connected. And the transmission belt circulates and moves between the two pulleys. At this time, the upper and lower parts in the vertical direction of the transmission belt move in opposite directions to each other.

[0019] The fixed hook member 26 is arranged at the intermediate position of the pair of building-side doors 11, 11 when the pair of building-side doors 11, 11 are closed. The fixed hook member 26 engages with a first hook member 31 of the platform-side locking mechanism 30 described later.

[0020] In addition, door hangers 21, 21 are respectively provided on the pair of building-side doors 11, 11. The door hanger 21 is provided at the upper end in the vertical direction of the building-side door 11. When the car 120 stops at an arbitrary floor, the door hanger 21 of the building-side door 11 faces the door hanger of the car-side door 124. Also, the door hanger 21 is provided with a moving roller for sliding on the building-side door rail.

[0021] In addition, the door hanger 21 is provided with a connecting member that connects to the transmission belt. The connecting member of one door hanger 21 is connected to the lower part of the transmission belt, and the connecting member of the other door hanger 21 is connected to the upper part of the transmission belt. When the transmission belt moves, the pair of building-side doors 11, 11 move in the closing direction approaching each other or the opening direction moving away from each other via the connecting members.

[0022] Further, when the car 120 stops among the two door hangers 21, 21, a landing-side locking mechanism 30 is provided on the door hanger 21 facing the engaging element provided on the car 120.

[0023] [Landing-side locking mechanism] Next, with reference to FIGS. 3 and 4, the detailed configuration of the landing-side locking mechanism 30 will be described. FIG. 3 is a plan view of the landing-side locking mechanism 30 viewed from above, and FIG. 4 is a front view showing the landing-side locking mechanism 30.

[0024] As shown in FIGS. 3 and 4, the landing-side locking mechanism 30 has a first hook member 31, a rotation shaft 35, two landing-side engaging elements 34, and a second hook member 36. Further, two landing-side engaging elements 34 are provided on the first hook member 31.

[0025] The two landing-side engaging elements 34 are inserted between the two engaging elements provided on the car 120 when the car 120 stops. When the car-side door 124 of the car 120 opens and closes, the landing-side engaging element 34 abuts against the engaging element provided on the car 120. Thereby, the first hook member 31 rotates about the rotation shaft 35.

[0026] In addition, a first engaging portion 31a is formed at one end portion on the closing side in the opening and closing direction of the first hook member 31. The first engaging portion 31a engages with a fixed hook member 26 provided on the building-side door unit 12.

[0027] The fixed hook member 26 is fixed to the building-side door unit 12 via the fixed bracket 25. The fixed hook member 26 is provided with an engagement receiving portion 26a that engages with the first hook member 31. Thereby, the landing-side locking mechanism 30 locks the building-side door 11 in the closed state. Further, the fixed bracket 25 is formed with a key hole 27 into which a unlocking key 41 (see FIG. 5) can be inserted. And the fixed hook member 26 is fixed to the upper surface in the vertical direction of the fixed bracket 25 in which the key hole 27 is formed. Further, a notch 26b is formed at a position of the fixed hook member 26 facing the key hole 27. Therefore, the upper side in the vertical direction of the key hole 27 in the fixed bracket 25 is open.

[0028] Further, the engagement receiving portion 26a of the fixed hook member 26 engages with a second hook member 36, which will be described later, when the building-side door 11 is opened one step.

[0029] The second hook member 36 is fixed to the first hook member 31 via a fixing bolt 38. The second hook member 36 has a first lever piece 36a, a second lever piece 36b, a second engaging portion 36c, and an inclined portion 36d.

[0030] The first lever piece 36a is fixed to the first hook member 31 via a fixing bolt 38. And the first lever piece 36a protrudes toward the closed side in the opening / closing direction from one end portion on the closed side in the opening / closing direction of the first hook member 31. Further, the first lever piece 36a is disposed above the key hole 27 provided in the fixed bracket 25 in the vertical direction. And when the unlocking key 41 is inserted into the key hole 27, the first lever piece 36a is pushed up by the unlocking key 41.

[0031] At the end of the first lever piece 36a on the side opposite to the first hook member 31, that is, at one end on the closing side in the opening and closing direction, a second engaging portion 36c is continuously provided. The second engaging portion 36c is a stepped portion protruding downward in the vertical direction from the first lever piece 36a. A second lever piece 36b is provided at the end of the second engaging portion 36c on the side opposite to the first lever piece 36a. The second lever piece 36b protrudes from the second engaging portion 36c toward the side opposite to the first lever piece 36a. That is, the second engaging portion 36c is provided between the first lever piece 36a and the second lever piece 36b.

[0032] The second lever piece 36b protrudes from the second engaging portion 36c toward the closing side in the opening and closing direction. Further, an inclined portion 36d is formed at the tip of the second lever piece 36b, that is, at one end on the closing side in the opening and closing direction. The inclined portion 36d is continuously inclined upward in the vertical direction as it moves away from the second lever piece 36b.

[0033] 1-2. Operating Example Next, the opening and closing operation of the building-side door 11 in the elevator 1 having the above-described configuration will be described with reference to FIGS. 5 to 9. FIG. 5 is a front view showing the first unlocking operation of the landing-side locking mechanism 30. FIG. 6 is a front view showing the second locked state of the landing-side locking mechanism 30, and FIG. 7 is a front view showing the second-stage unlocking operation of the landing-side locking mechanism 30. Further, FIG. 8 is a front view of the building-side door 11 showing the second locked state, and FIG. 9 is a front view showing the state where the building-side door 11 is opened.

[0034] As shown in FIG. 5, the operator inserts the unlocking key 41 from the landing 201 side into the key hole 27 of the fixing bracket 25. Here, the first lever piece 36a of the second hook member 36 is disposed above the key hole 27 in the vertical direction. Therefore, the first lever piece 36a is pushed upward in the vertical direction by the unlocking key 41. Then, the first hook member 31 connected to the second hook member 36 is also pushed upward in the vertical direction together with the second hook member 36. As a result, the first hook member 31 rotates about the rotation shaft 35, and the engagement between the first engagement portion 31a of the first hook member 31 and the engagement receiving portion 26a of the fixed hook member 26 is released. As a result, the first-stage unlocking operation is completed.

[0035] Next, the operator moves the building side door 11 in the opening direction of the opening and closing direction. As a result, as shown in FIG. 8, the building side door 11 can be opened in one stage. Further, when the unlocking key 41 is pulled out from the key hole 27, the first hook member 31 and the second hook member 36 rotate downward in the vertical direction about the rotation shaft 35. In this state, when the building side door 11 is moved in the opening direction of the opening and closing direction, as shown in FIGS. 6 and 8, the second engagement portion 36c of the second hook member 36 engages with the engagement receiving portion 26a of the fixed hook member 26. As a result, the landing side locking mechanism 30 can lock the building side door 11 in the second stage. At this time, the second lever piece 36b of the second hook member 36 is disposed above the key hole 27 in the vertical direction.

[0036] The interval between the pair of building side doors 11, 11 in the state where the building side door 11 shown in FIG. 8 is opened in one stage is an interval at which a person cannot enter the hoistway 110 from the landing 201. By opening the building side door 11 in one stage, the inside of the hoistway 110 can be confirmed from the landing 201. As a result, it is possible to confirm whether the elevator car 120 is stopped at a predetermined position, and it is possible to prevent the operator from falling into the hoistway 110.

[0037] Here, the second engaging portion 36c formed between the first lever piece 36a and the second lever piece 36b in the second hook member 36 is a stepped portion that descends downward in the vertical direction from the first lever piece 36a. Therefore, when the building-side door 11 is opened without pulling out the unlocking key 41 from the keyhole 27, the unlocking key 41 abuts against the second engaging portion 36c of the second hook member 36. Therefore, unless the second-stage locked state is set, the building-side door 11 cannot be further opened. As a result, it is possible to reliably perform the inspection work in the hoistway 110 with the building-side door 11 opened to the first stage.

[0038] When the inspection work for the position of the car 120 is completed, as shown in FIG. 7, the operator inserts the unlocking key 41 into the keyhole 27 of the fixing bracket 25 from the landing 201 side. As described above, in the second-stage locked state, the second lever piece 36b of the second hook member 36 is disposed above the keyhole 27 in the vertical direction.

[0039] Therefore, the second lever piece 36b is pushed upward in the vertical direction by the unlocking key 41. Then, the first hook member 31 connected to the second hook member 36 is also pushed upward in the vertical direction together with the second hook member 36. As a result, the first hook member 31 rotates about the rotation shaft 35, and the engagement between the second engaging portion 36c of the second hook member 36 and the engagement receiving portion 26a of the fixed hook member 26 is released. As a result, the second-stage unlocking operation is completed. Then, the operator moves the building-side door 11 in the opening direction of the opening and closing direction. As a result, as shown in FIG. 9, the building-side door 11 can be opened.

[0040] According to the landing-side locking mechanism 30 of this example, the second hook member 36 that performs the second-stage locking is integrally fixed to the first hook member 31. As a result, the number of parts can be reduced as compared with the conventional technology in which two locking mechanisms are provided. Further, the second hook member 36 that performs the second-stage locking also serves as a lever for rotating the first hook member 31. As a result, the number of parts of the landing-side locking mechanism 30 can be reduced, and the landing-side locking mechanism 30 can be miniaturized.

[0041] When the inspection work is completed, the operator performs a closing operation on the building side door 11. At this time, the second hook member 36 abuts against the engagement receiving portion 26a of the fixed hook member 26. Here, an inclined portion 36d is formed at the tip of the second lever piece 36b of the second hook member 36. As a result, when performing the closing operation of the building side door 11, the second hook member 36 and the first hook member 31 can be smoothly rotated about the rotation axis 35. As a result, the second lever piece 36b of the second hook member 36 can smoothly overcome the engagement receiving portion 26a.

[0042] Also, during normal operation, the two landing side engaging members 34 of the landing side locking mechanism 30 are inserted between the two engaging members provided on the car 120 when the car 120 stops. Then, when the car side door 124 of the car 120 opens and closes, the landing side engaging member 34 abuts against the engaging member provided on the car 120. As a result, the first hook member 31 rotates about the rotation axis 35. When the first hook member 31 rotates, the engagement between the first engagement portion 31a and the fixed hook member 26 is released. Also, when the first hook member 31 rotates, the second hook member 36 also rotates.

[0043] Also, the building side door 11 moves in the opening and closing direction together with the car side door 124. Therefore, the first hook member 31 and the second hook member 36 of the landing side locking mechanism 30 move in a state of rotating about the rotation axis 35. Therefore, during the opening and closing operation during normal operation, the second hook member 36 does not abut against the fixed hook member 26. As a result, the building side door 11 can be smoothly opened and closed.

[0044] 2. Second Embodiment Example Next, an elevator according to a second embodiment example will be described with reference to FIG. 10. FIG. 10 is a diagram showing a landing side locking mechanism according to a second embodiment example.

[0045] The difference between the landing-side locking mechanism according to this second exemplary embodiment and the landing-side locking mechanism according to the first exemplary embodiment lies in the configuration of the second hook member 36. Therefore, here, the same reference numerals are given to the parts common to the landing-side locking mechanism 30 according to the first exemplary embodiment, and the overlapping descriptions are omitted.

[0046] As shown in FIG. 10, the landing lock mechanism 30B includes a first hook member 31, a rotation shaft 35, two landing-side engaging elements 34, and a second hook member 36B. The second hook member 36B is fixed to the first hook member 31 via a fixing bolt 38.

[0047] The second hook member 36B has a first lever piece 36a, a second lever piece 36b, a second engaging portion 36c, and an inclined portion 36d. The second hook member 36B also has a first pressing portion 36e and a second pressing portion 36f.

[0048] Note that the first lever piece 36a and the second lever piece 36b of the second hook member 36B according to the second exemplary embodiment are arranged at positions outside the key hole 27 provided in the fixing bracket 25 from above in the vertical direction. The first pressing portion 36e is arranged on the first lever piece 36a.

[0049] In the first-stage locked state, the first pressing portion 36e is arranged above the key hole 27 in the vertical direction. Therefore, when the unlocking key 41 is inserted into the key hole 27, the first pressing portion 36e is pushed up by the unlocking key 41. As a result, the first hook member 31 rotates about the rotation shaft 35 together with the second hook member 36B, and the engagement between the first engaging portion 31a and the fixed hook member 26 is released.

[0050] When the building - side door 11 is moved to the opening side in the opening - closing direction, the first pressing part 36e disengages from the position facing the keyhole 27. As a result, the contact between the unlocking key 41 and the first pressing part 36e is released, and the first hook member 31 and the second hook member 36B rotate downward in the vertical direction around the rotation shaft 35. Then, the second engaging part 36c of the second hook member 36B engages with the engaging receiving part 26a of the fixed hook member 26. Thereby, the landing - side locking mechanism 30 can surely put the building - side door 11 into the second - stage locked state.

[0051] The second pressing part 36f is arranged on the second lever piece 36b. In the second - stage locked state, the second pressing part 36f is arranged above the keyhole 27 in the vertical direction. Therefore, when the unlocking key 41 is inserted into the keyhole 27, the second pressing part 36f is pushed up by the unlocking key 41. As a result, the second hook member 36B rotates around the rotation shaft 35, and the engagement between the second engaging part 36c and the fixed hook member 26 is released.

[0052] Since other configurations are the same as those of the elevator 1 according to the above - described first embodiment, their descriptions are omitted. In an elevator having such a landing locking mechanism 30B the same operations and effects as those of the elevator 1 according to the above - described first embodiment can be obtained.

[0053] Note that the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the gist of the invention described in the claims.

[0054] Furthermore, the configuration of the elevator 1 is not limited to the 1:1 roping elevator shown in FIG. 1, and various other elevators such as 2:1 roping elevators and hydraulic elevators can be applied. Also, it can be applied to a machine - room - less elevator.

[0055] In addition, in this specification, words such as "parallel" and "orthogonal" are used, but these do not mean only strict "parallel" and "orthogonal", and may be in a state of "substantially parallel" or "substantially orthogonal" that includes "parallel" and "orthogonal" and is within the range where their functions can be exerted.

Explanation of Signs

[0056] 1... Elevator, 11... Building-side door, 12... Building-side door unit, 13... Building-side door sill, 21... Door hanger, 25... Fixed bracket, 26... Fixed hook member, 26a... Engagement receiving part, 27... Keyhole, 30... Landing-side locking mechanism, 31... First hook member, 31a... First engagement part, 34... Landing-side engaging element, 35... Rotation axis, 36, 36B... Second hook member, 36a... First lever piece, 36b... Second lever piece, 36c... Second engagement part, 36d... Inclined part, 36e... First pressing part, 36f... Second pressing part, 38... Fixed bolt, 41... Key, 100... Hoisting machine, 110... Hoistway, 120... Car, 121... Car room, 122... Car-side door unit, 123... Car-side door sill, 124... Car-side door, 130... Rope, 160... Machine room, 201... Landing, 202... Entrance / exit

Claims

1. A building-side door provided at the entrance of a landing where an elevator car stops in a building structure, and a landing-side locking mechanism that locks the building-side door in a closed state and can be unlocked, comprising: The landing-side locking mechanism has a rotation shaft provided on the building-side door, a first hook member rotatably supported by the rotation shaft and provided with a first engaging portion, a second hook member fixed to the first hook member and provided with a second engaging portion, and a fixed hook member that can be engaged and disengaged with the first engaging portion and the second engaging portion; When the unlocking key is inserted, the second hook member has a lever piece that rotates the first hook member and the second hook member around the rotation shaft Elevator.

2. The second hook member has a first lever piece fixed to the first hook member, and a second lever piece protruding from the second engaging portion toward the closed side in the opening / closing direction, and the second engaging portion is disposed between the first lever piece and the second lever piece The elevator according to Claim 1.

3. The first lever piece is disposed opposite to a keyhole into which the unlocking key is inserted in a state where the first engaging portion and the fixed hook member are engaged, and the second lever piece is disposed opposite to a keyhole into which the unlocking key is inserted in a state where the second engaging portion and the fixed hook member are engaged The elevator according to Claim 2.

4. The second engaging portion is a stepped portion extending downward in the vertical direction from the first lever piece The elevator according to Claim 3.

5. The second hook member has a first pressing portion provided on the first lever piece and opposite to a keyhole into which the unlocking key is inserted in a state where the first engaging portion and the fixed hook member are engaged, and a second pressing portion provided on the second lever piece and opposite to a keyhole into which the unlocking key is inserted in a state where the second engaging portion and the fixed hook member are engaged The elevator according to Claim 2.

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