JPWO2006097997A1 - Elevator car door interlock device - Google Patents

Abstract

In the engagement establishment range in which the car door 3 and the landing door 23 are engaged at the landing 21, the car door 3 and the landing door 23 are engaged and opened and closed, and the car door 3 and the landing door are between the landings 21. In the elevator car door interlock device that prevents the car door 3 from opening, the lever mechanism 7 that prevents the car door 3 from opening is moved outside the engagement establishment range where the car 23 is not engaged. 3, an engaged portion 11 that engages with the lever mechanism 7 is provided on the car 1, and a cam 24 that restricts the rotation of the lever mechanism 7 is provided on the landing door 23. In the range where the car door 3 and the landing door 23 are not engaged, the opening operation of the car door 3 is mechanically blocked. Since the cam 24 for restricting the rotation of the lever mechanism 7 that prevents the opening operation of the car door 3 is provided on the landing door 23, the mounting operation of the cam 24 is facilitated and the opening operation of the car door 3 is performed. The blocking lever mechanism 7 has two shafts 8 and 9 to increase the freedom of the mounting position.

Description

  The present invention relates to an elevator car door interlock device that prevents a passenger from manually opening a car door from within a car when the elevator stops between landings due to a power failure or the like.

  The elevator door is composed of a car door provided on the car side and a hall door provided at the hall entrance on each floor of the building. These doors are generally opened and closed by a door opening and closing device mounted on the car side, and an engagement plate (not shown) provided on the car door and an engagement plate engaging device (not shown) provided on the landing door. (Not shown) transmits the movement of the car door to the landing door and opens and closes the car door and the landing door at the same time. Conventionally, when an elevator car is stopped between the landings (floor floors) due to an accident such as a power failure, passengers in the car try to escape on their own, or passengers in the car accidentally open the car door There was a possibility of opening. In this case, if the car door is in a range (section) where the car door is engaged with the landing door, the landing door opens as soon as the car door is opened, and a slight level difference may occur between the car floor and the landing floor. Passengers can escape from the car to the landing. On the other hand, in a range (section) where the car door and the landing door are not engaged, the car door is opened alone, and the passenger can enter the hoistway.

  As a device for preventing this, an elevator car door interlock device shown in Patent Document 1 has been proposed. However, since this interlock device needs to be provided in the hoistway with a control plate that restricts the rotation of the lever mechanism that prevents the opening operation of the car door, there is a problem that it takes time to install the control plate. . Moreover, since the lever mechanism for preventing the opening operation of the car door is a single shaft, there is a problem that the mounting position is limited.

Japanese Patent Laid-Open No. 10-45360

  The present invention is intended to solve the above-mentioned problems, and mechanically prevents the car door from opening when the car door and the landing door are not engaged. A cam that restricts the rotation of the lever mechanism that prevents the operation is provided on the landing door to facilitate the mounting operation of the cam, and the lever mechanism that prevents the opening operation of the car door from being used as two axes. The object is to obtain a device that increases the freedom of position.

  In the elevator car door interlock device according to the present invention, in the engagement establishment range where the car door and the landing door are engaged at the landing, the car door and the landing door are engaged and opened and closed between the landings. In an elevator car door interlock device that prevents the opening operation of the car door outside the engagement establishment range where the car door and the landing door do not engage, the car door is pivotally supported by the first shaft. A first lever that can rotate in the locking and unlocking directions of the car door, and a second lever that is pivotally supported on the car door by a second shaft and that can rotate in the locking and unlocking directions of the car door. Two levers, and a connecting rod that connects the levers so that the locking direction and the unlocking direction of the first lever and the locking direction and the unlocking direction of the second lever rotate in conjunction with each other, Rotate in the locking direction A lever mechanism that is biased to be engaged, an engaged portion that is provided on the car, and an engagement that is provided on the first lever and engages with the engaged part to prevent the car door from opening. A cage door, a first position for evacuating the engaging portion so as not to engage with the engaged portion, and a second position for engaging the engaging portion with the engaged portion; A guide provided on the car so as to guide the first lever to be positioned at the first position or the second position in conjunction with the opening / closing operation of the car, the car door and the landing door are in a range where the engagement is established. Provided on the landing door so that it can come into contact with the end of the second lever when entering the vehicle, and includes a cam that prevents the second lever from rotating in the locking direction. When the engagement establishment range of the door and the landing door is reached, the end of the second lever is The second lever and the first lever interlocked therewith are prevented from rotating in the locking direction, and the first lever is held between the first position and the second position of the guide. When the car is outside the engagement establishment range of the car door and the landing door, the first lever is guided by the guide to the second position. The engaging part is engaged with the engaged part, and the opening operation of the car door is prevented.

  According to the elevator car door interlock device of the present invention, in the range where the car door and the landing door are not engaged, the car door opening operation can be mechanically prevented, and the car door opening operation can be prevented. A cam for restricting the rotation of the lever mechanism to be blocked is provided on the landing door to facilitate the mounting operation of the cam, and the lever mechanism for blocking the opening operation of the car door is biaxial, and its mounting position. Can increase the freedom.

Embodiment 1 FIG.
In the elevator car door interlock device according to the first embodiment, the car door and the landing door can be opened when the car floor is in a range where a certain engagement is established above and below the landing floor. However, when the car floor is outside the above-described engagement establishment range above and below the landing floor, it is locked when the car door is opened by a settable distance Lmm (for example, 20 to 30 mm), and the car door is opened further. It is a structure that cannot be done.
FIG. 1 is a front view of the structure of a car-side device of an elevator car door interlock device according to Embodiment 1 of the present invention as seen from the landing side. FIG. 2 is a front view of the landing door facing the car door of FIG. 1 as seen from the car side.

  The car 1 is provided with a hanger rail 2 that extends in the width direction of the entrance at the top of the entrance of the car 1. The car door 3 is suspended from the hanger rail 2 by a hanger 4 fixed to the upper edge thereof, and is guided by the hanger rail 2 to open and close the door of the car 1. The motor 5 controls the opening / closing of the car door 3 via the belt 6. As will be described later, the lever mechanism 7 prevents the car door 3 from opening, and is supported on the car door 3 by the first shaft 8 and supported on the car door 3 by the second shaft 9. Yes. As will be described later, the guide 10 guides the lever mechanism 7 and is fixed to the car. As will be described later, the engaged portion 11 is engaged with the lever mechanism 7 to prevent the car door 3 from opening, and is fixed to the car. The guide 10 and the engaged portion 11 are integrally formed by bending a steel material.

  In FIG. 2, the landing 21 is provided on each floor, and a hanger rail 22 extending in the width direction of the entrance is provided on the hoistway side above the entrance of the landing 21. The landing door 23 is suspended from the hanger rail 22 by a hanger 25 fixed to the upper edge thereof, and is guided by the hanger rail 22 to open and close the entrance / exit of the landing 21. Opening and closing of the car door and the landing door is generally performed by a door opening and closing device mounted on the car side, an engagement plate provided on the car door, and an engagement plate engagement device (not shown) provided on the landing door; Thus, the movement of the car door is transmitted to the landing door, and the car door and the landing door are simultaneously opened and closed. Reference numeral 24 denotes a cam (restriction plate) provided on the landing door, which restricts the operation of the lever mechanism 7 to prevent the car door 3 from opening, as will be described later.

  FIG. 3 is a diagram showing the lever mechanism 7 used in the first embodiment, and its holding state (unlocked state) will be described. FIG. 4 is a view for explaining a locked state (locked state) of the lever mechanism 7 of FIG. The first lever 31 of the lever mechanism 7 is pivotally supported on the car door 3 by the first shaft 8 and can rotate in the locking direction (counterclockwise) and the unlocking direction (clockwise). One end 31a of the first lever 31 has a roller 31b guided by the guide 10 (FIG. 5) and an engaging portion 31c that engages with the engaged portion 11 (FIG. 5).

  The second lever 32 of the lever mechanism 7 is pivotally supported on the car door 3 by the second shaft 9 and can rotate in the locking direction (clockwise) and the unlocking direction (counterclockwise). One end 32a of the second lever 32 has a roller 32b that abuts against the cam 24 (FIG. 6). Between the other end portion 31d of the first lever 31 and the other end portion 32c of the second lever 32, there is a connecting rod 33 for connecting both levers 31 and 32, and the locking direction and the unlocking direction of the first lever 31 and The locking direction and the unlocking direction of the second lever 32 are rotated in conjunction with each other.

  In the lever mechanism 7 having the first lever 31, the second lever 32 and the connecting rod 33, a moment 32 d is generated at the center of the second shaft 9 of the second lever 32 due to mass imbalance, and there is no external force. The first end 31 a of the first lever 31 is designed so as to be lowered about the first shaft 8. Arrows 33a, 31e, and 31f indicate the moving direction of the lever mechanism 7 due to mass imbalance. That is, it will be in the state of FIG. 4 and will be in a locked state (locked state) as will be described later. Further, by attaching the tension spring 34 between the second lever 32 and the car door 3 so that the force indicated by the arrow 34a is applied, and generating the moment 32d in the same direction, the operation can be assisted.

  On the other hand, the state shown in FIG. 3 is a holding state (unlocked state). One end portion of the first lever 31 can be obtained by pushing the roller 32b in the direction of arrow A or pushing the roller 31b in the direction of arrow B. 31a rotates around the first shaft 8 and lifts up. When this state is maintained and the car door 3 is opened, the car door 3 (and the landing door 23) can be opened without being locked.

  When the car door 3 is in the fully closed state, referring to FIG. 8, the roller 31b disposed on the first lever 31 is forcibly forced by the guide (lifting plate) 10 provided on the car (fixed side of the car). The one end 31a of the first lever 31 is raised. This state is a state in which the roller 31b is pushed in the direction of arrow B in the holding state of FIG. 3, and if this is held, the car door 3 (and the landing door 23) can be opened, When the door 3 starts to open, the roller 31b moves downward along the slope of the guide 10, so that when the force indicated by the arrow A does not work, the door is locked when the Lmm car door 3 is opened.

  5-7 is a figure explaining the case where a car floor is in the engagement establishment range which exists in the certain range of the upper and lower sides of a landing floor. FIG. 5 is a diagram for explaining a fully closed state of the car door. A gap Ls exists between the roller 32b of the car door 3 and the cam 24 on the landing door 23 side. The roller 31 b of the first lever 31 is lifted and held at the first position of the guide 10. FIG. 6 is a diagram for explaining the opening of the car door, and shows a state where the roller 32b on the car door 3 side and the cam 24 on the landing door 23 side abut. At this time, the roller 31b of the first lever 31 moves from the first position of the guide 10 to an intermediate position between the first position and the second position, and is held in a state where the one end 31a of the first lever 31 is somewhat lowered. The FIG. 7 is a view for explaining the opening of the car door. The car door 3 and the landing door 23 can be opened together with the roller 32b on the car door 3 side and the cam 24 on the landing door 23 side in contact with each other. Indicates.

  The unlocking operation in the engagement establishment range will be described with reference to FIGS. When the car floor surface is in the above-described engagement establishment range with respect to the landing floor surface, when the car door 3 starts to open from the fully closed state of the car door 3 in FIG. 5 (FIG. 6), a roller on the car door 3 side. The roller 32b of the first lever 31 of the lever mechanism 7 is held between the first position and the second position of the guide 10 with the cam 24 disposed on the landing door 23 side. Therefore, the one end 31a of the first lever 31 is maintained in the raised state (although it is somewhat lowered). That is, the force indicated by the arrow A in the holding state of FIG. 3 is generated. Therefore, as shown in FIG. 7, the car door 3 can pass through the engaging portion 31 c of the first lever 31 without being caught by the engaged portion 11 on the car 1 (fixed car) side, and the car door 1 is opened. Is possible.

  At this time, the distance Ls between the roller 32b (the end of the second lever 32) on the car door 3 side and the cam 24 on the landing door 23 side is provided on the engagement plate provided on the car door 3 and the landing door 23. The roller 31b of the first lever 31 is surely moved between the first position and the second position of the guide 10 by setting it slightly larger than the engagement gap (distance) of the engagement plate engaging device. Yes. That is, the first lever 31 is held with its position slightly lowered.

  FIGS. 8 to 10 are diagrams illustrating a case where the car floor surface is outside the engagement establishment range that is outside a certain range above and below the landing floor surface. Therefore, the cam 24 on the landing door 23 side does not exist in the rotation range of the roller 32 b of the second lever 32 of the car door 3. FIG. 8 is a view for explaining the fully closed state of the car door. The roller 31 b of the first lever 31 is lifted and held at the first position of the guide 10. FIG. 9 is a view for explaining the opening of the car door. The roller 31b of the first lever 31 starts moving from the first position to the second position of the guide 10 and lowers one end 31a of the first lever 31. FIG. 10 is a view for explaining locking of the car door. The roller 31b of the first lever 31 moves to the second position of the guide 10, and the engaging portion 31c of the first lever 31 on the car door 3 side is moved to the car (the car). It engages with the engaged portion 11 on the fixed side.

  The locking operation outside the engagement establishment range will be described with reference to FIGS. When the car floor surface is outside the engagement establishment range with respect to the landing floor surface, even if the car door 3 starts to open from the fully closed state of the car door 3 in FIG. 8 (FIG. 9), the roller on the car door 3 side 32b does not contact the cam 24 disposed on the landing door 23 side. Therefore, as shown in FIG. 10, when the roller 31b of the first lever 31 moves downward along the guide 10, the first lever 31 rotates about the first shaft 8, and its one end 31a is moved downward. It becomes possible to move.

  At this time, due to the unbalance of the mass of the lever mechanism 7 and the attached tension spring 34, a moment 32d is generated at the center of the second shaft 9 of the second lever 32, and the one end 31a of the first lever 31 is lowered. The mating portion 31c and the engaged portion 11 of the car 1 are engaged. For this reason, the first lever 31 is caught by the engaged portion 11 of the car, and the car door 3 cannot be opened any further. That is, the car door 3 is locked in a state where it is opened by several tens of mm. By slightly opening the car door 3, even when the elevator stops outside the range of engagement between the landings, it is possible to prevent passengers from lacking oxygen.

In Embodiment 1, since the cam 24 is provided in the landing door 23, workability | operativity is improved rather than the case where it provides in a hoistway. Furthermore, the lever mechanism 7 provided in the car door 3 includes a first lever 31 that is pivotally supported by the first shaft, a second lever 32 that is pivotally supported by the second shaft, and a connection that connects the levers 31 and 32. Since it is composed of the rod 33, the positions of the levers 31 and 32 can be set appropriately, the position of the first lever 31 is set close to the engaged portion 11 of the car 1, and the position of the second lever 32 is set to the landing door 23. Can be set at appropriate positions in the vicinity of the cam 24.
In the first embodiment, the portion expressed as turning in the clockwise direction is counterclockwise when the lever mechanism 7 is installed on the opposite car door symmetrically with the center line of both car doors. It turns.

Embodiment 2. FIG.
FIG. 11 is a diagram for explaining a fully closed state of the car door in the elevator car door interlock device according to the second embodiment. The difference from the first embodiment is that an abutting portion (protrusion fitting) 41 that facilitates rotation when the first lever 31 does not rotate due to a failure or the like is provided on the car 1 (fixed car) side. FIG. 12 is a diagram for explaining how the one end 31a of the first lever 31 comes into contact with the abutting portion 41 when the car door 3 starts to open while the first lever 31 does not rotate due to failure. FIG. 13 is a diagram for explaining a state in which the one end portion 31 a of the first lever 31 is pushed downward by coming into contact with the abutting portion 41.

  When the car floor surface is outside the above-mentioned engagement establishment range with respect to the landing floor surface, even if the car door 3 starts to open from the state of FIG. 11, the roller 32b on the car door 3 side is arranged on the landing door 23 side. No contact with the cam 24. That is, the force of the arrow A in the holding state of FIG. 3 is not generated. Therefore, when the roller 31b of the first lever 31 is separated from the guide 10, the force indicated by the arrow B in the holding state in FIG. 3 is lost. Therefore, the one end 31a of the first lever 31 can be moved downward. At this time, in a normal locking operation, a clockwise moment 32d is generated at the center of the second shaft 9 of the second lever 32 by the unbalance due to the mass of the lever mechanism 7 and the attached tension spring 34, and the first lever One end 31a of 31 is lowered and locked.

  However, when the lever mechanism 7 fails, for example, when the one end portion 31a of the first lever 31 does not move downward due to the portion of the first shaft 8 or the second shaft 9 not rotating smoothly, the contact portion 41 And the first end 31a of the first lever 31 are in contact with each other, and it is possible to inform the surroundings of the abnormality by the collision sound. In addition, in the case where each rotating portion is hard rather than a failure due to breakage of the lever mechanism 7, the one end portion 31a of the first lever 31 is pushed down by the abutting portion 41 as shown by an arrow 41a due to the contact. It can be locked again.

In addition, the position where the one end 31a of the first lever 31 does not hit the hitting part 41 when it is normal, but the hitting part 41 hits the hitting part 41 when there is a failure. That is, when the one end portion 31a of the first lever 31 is normal, even in the state of FIG. 6, it is lowered to an intermediate position between the first position and the second position, and when abnormal, it remains at the first position of the position guide 10 and does not go down. The position of the car 1 of the abutting portion 41 is set between the first position and the intermediate position.
As described above, in the second embodiment, when the lever mechanism 7 is not smoothly rotated, a situation in which the car door 3 is not locked outside the engagement establishment range can be detected by an abnormal sound, and the rotation is promoted. Can do. Further, a detector that informs the outside of the contact between the one end portion 31 a of the first lever 31 and the contact portion 41 may be provided.

The interlock device for the elevator car door of the present invention can be applied regardless of the door opening / closing method (double-opening, single-opening, etc.) and the driving method (belt type, link type, etc.).
In addition, the locking range is described as being the same as the engagement establishment range between the car door and the landing door, but can be set individually because the constituent devices are independent.

It is the front view which looked at the structure of the apparatus by the side of the car of the interlock apparatus of the elevator car door which concerns on Embodiment 1 of this invention from the landing side. It is the front view seen from the cage | basket | car side of the landing door facing the cage door of FIG. FIG. 6 is a diagram illustrating a holding state of a lever mechanism used in the first embodiment. It is a figure explaining the locking state of the lever mechanism of FIG. It is a figure explaining the fully closed state of a car door when it exists in the engagement establishment range. It is a figure explaining the opening start of a car door in the case where it exists in the engagement establishment range. It is a figure explaining opening of a car door in the case where it is in an engagement establishment range. It is a figure explaining the fully closed state of a car door when it is outside an engagement establishment range. It is a figure explaining the opening start of a car door in the case of being outside the engagement establishment range. It is a figure explaining locking of a car door when it is outside an engagement establishment range. It is a figure explaining the fully closed state of the car door in the interlocking device of the elevator car door which concerns on Embodiment 2. FIG. It is a figure explaining a mode that a 1st lever contacts a contact part when a car door begins to open, without a 1st lever rotating by failure. It is a figure explaining a mode that it contacts a contact part and a 1st lever is pushed down below.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Hanger rail 3 Car door 4 Hanger 5 Motor 6 Belt 7 Lever mechanism 8 1st shaft 9 2nd shaft 10 Guide 11 Engagement part 21 Place 22 Hanger rail 23 Landing door 24 Cam 25 Hanger 31 1st lever 31a One end Part 31b roller 31c engaging part 31d other end part 31e arrow 31f arrow 32 second lever 32a one end part 32b roller 32c other end part 32d moment 33 connecting rod 33a arrow 34 tension spring 34a arrow 41 abutting part 41a arrow

Claims (5)

In the engagement establishment range in which the car door and the landing door are engaged at the landing, the car door and the landing door are engaged and opened and closed, and the engagement is established between the landings so that the car door and the landing door are not engaged. Outside the range, in the elevator car door interlock device that prevents the car door from opening,
A first lever that is pivotally supported on the car door by a first shaft and can be rotated in a locking direction and an unlocking direction of the car door, and is pivotally supported by a second shaft on the car door and the locking direction of the car door. And the second lever which can be rotated in the unlocking direction, the both levers so that the locking direction and unlocking direction of the first lever and the locking direction and unlocking direction of the second lever are rotated in conjunction with each other. A lever mechanism that is urged to rotate in the locking direction.
An engaged portion provided in the car,
An engaging portion that is provided on the first lever and engages with the engaged portion to prevent the car door from opening;
A first position for evacuating the engaging portion so as not to engage with the engaged portion and a second position for engaging the engaging portion with the engaged portion, and opening / closing operation of the car door A guide provided on the car so as to guide the first lever in conjunction with the first lever and position the first lever in the first position or the second position;
When the car door and the landing door enter the engagement establishment range, the landing door is provided so as to be in contact with the end of the second lever, and the second lever is rotated in the locking direction. With a blocking cam,
When the car reaches the engagement establishment range of the car door and the landing door, the end of the second lever comes into contact with the cam and the second lever and the first lever interlocked therewith The rotation in the locking direction is prevented, and the first lever is held in the middle between the first position and the second position of the guide to allow the car door to open.
When the car is outside the engagement establishment range of the car door and the landing door, the first lever is guided by the guide and is positioned at the second position, and the engaging portion is the engaged portion. An elevator car door interlock device that engages with the door to prevent the car door from opening. 2. The elevator car door interlock device according to claim 1, wherein a tension spring is provided between the second lever and the car door so as to rotate the lever mechanism in the locking direction. The elevator car door interlock device according to claim 1, wherein the guide and the engaged portion are integrally formed and fixed to the car. When the car door is closed, the distance between the end of the second lever and the cam in the engagement establishment range of the car door and the landing door is larger than the engagement distance of the car door and the landing door. The elevator car door interlock device according to claim 1. 2. The elevator car door interlock device according to claim 1, wherein the car is provided with a contact portion that contacts the first lever when the first lever does not rotate.

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