JP7283449B2 - Elevator door closing detector - Google Patents

Description

The present invention relates to a technology for detecting the closed state of doors in an elevator.

2. Description of the Related Art In an elevator, each door of a car door and a landing door is provided with a detection switch for detecting that the door is in a fully closed state (see Patent Documents 1 and 2, for example). Specifically, the detection switch is configured to close and short-circuit when the door is fully closed. In order to ensure the safety of users in the elevator, the operation of the elevator is permitted only when the fully closed state of all the doors is detected by the detection switches.

JP-A-7-61749 JP 2009-67517 A

However, in the conventional elevator described above, even when the door is fully closed and the detection switch is closed, if the elevator vibrates due to an earthquake or the like, the vibration at that time causes the detection switch to temporarily turn off. There is a risk that it will open. If any one of the detection switches is opened while elevator operation is permitted, even temporarily, the safety control is activated and the elevator is stopped even though the doors are fully closed. may come to an emergency stop and the user may be trapped in the car.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a door-closed detection device capable of accurately detecting the fully closed state of a door even when an elevator vibrates due to the influence of an earthquake or the like.

An elevator door-closed detection device according to the present invention includes a detection switch for detecting that an elevator door is in a fully closed state, and a detection switch that swings in accordance with the opening/closing operation of the door so that the door is in a fully closed state. and a holding portion that holds the state of the swinging portion in which the detection switch is closed by magnetic force.

According to the above-mentioned door closing detection device, the state of the oscillating portion in which the detection switch is closed is held by the magnetic force of the holding portion. It becomes difficult to occur such as opening.

The door closing detection device may further include a release mechanism. Here, the release mechanism is a mechanism that releases the state of the oscillating portion in which the detection switch is closed against the magnetic force of the holding portion when the door is opened. According to this configuration, the state of the oscillating portion in which the detection switch is closed is reliably released by the release mechanism when the door is opened.

According to the present invention, even if an elevator vibrates due to an earthquake or the like, it is possible to accurately detect the fully closed state of the door.

FIG. 2 is a conceptual diagram showing a hanger structure for hanging a car door of an elevator so that it can be opened and closed; 1 is a conceptual diagram showing a door closed detection device according to a first embodiment; FIG. It is the figure which showed a series of operation|movement of the door closed detection apparatus which concerns on 1st Embodiment. FIG. 2 is a conceptual diagram showing a hanger structure for suspending an elevator hall door so that it can be opened and closed; FIG. 7 is a conceptual diagram showing (A) a detection switch and (B) a swinging portion of a door closing detection device according to a second embodiment; FIG. 7 is a diagram showing a series of operations of the door closed detection device according to the second embodiment;

[1] First Embodiment FIGS. 1A and 1B are conceptual diagrams showing a hanger structure for hanging a car door 101 of an elevator so that it can be opened and closed. Here, FIG. 1(A) shows a case where the car door 101 is in the middle of opening and closing, and FIG. 1(B) shows a case where the car door 101 is in a fully closed state.

A hanger structure of the car door 101 is composed of a door rail 102 horizontally fixed to the upper part of a frame forming an entrance of the car and a door hanger 103 slidably hung on the door rail 102.例文帳に追加In this embodiment, upper rollers 104A are pivotally supported on the left and right sides of the door hanger 103, and the upper rollers 104A are hung on the door rail 102. As shown in FIG. Further, in order to prevent the upper roller 104A from falling off from the door rail 102 and the door hanger 103 from rattling, lower rollers 104B are pivotally supported on the left and right sides of the door hanger 103 for sandwiching the door rail 102 with the upper roller 104A. It is

In this embodiment, the car door 101 is provided with the door closed detection device 1 for detecting the fully closed state of the car door 101 (see FIG. 1B). Details of the door closing detection device 1 will be described below.

FIG. 2 is a conceptual diagram showing the door closed detection device 1. As shown in FIG. 3A and 3B are diagrams showing a series of operations of the door closing detection device 1. FIG. As shown in these drawings, the door closing detection device 1 includes a detection switch 11 , a swing section 12 and a transmission section 13 .

The detection switch 11 has two terminals 111 and 112, and an operation portion 113 that brings the terminal 112 into contact with the terminal 111 to short-circuit the terminals 111 and 112. At least some of these components are A spring is biased in a direction to open the terminals 111 and 112 so that the switch 11 becomes a normally open contact. The detection switch 11 is fixed to the upper part of the frame that constitutes the doorway of the car (see FIG. 1A), and when the car door 101 is fully closed, a swinging portion (to be described later) is detected. 12 pushes the operating portion 113 upward against the force of the spring bias, and as a result, the terminals 111 and 112 are short-circuited (see FIG. 3B). The detection switch 11 detects that the car door 101 is fully closed when the terminals 111 and 112 are short-circuited (that is, the detection switch 11 is closed).

The swinging portion 12 is a portion that swings according to the opening/closing operation of the car door 101 and closes the detection switch 11 when the car door 101 is fully closed. In this embodiment, the swinging portion 12 has an operation arm 121, a transmission arm 122, and a release arm 123, and the operation arm 121 rotates around a pivot 124 provided in the vicinity of the detection switch 11. It is configured to swing (rotate) up and down integrally with the transmission arm 122 and the release arm 123). Specifically, each arm is configured as follows.

The operating arm 121 is an arm for operating the operating portion 113, and is positioned at a closed position Pc (see FIG. 3B) at which the detection switch 11 is closed by short-circuiting the terminals 111 and 112, and downward from the closed position Pc. and an open position Pd (see FIGS. 2 and 3A) at which the detection switch 11 is opened by moving to the position Pd (see FIGS. 2 and 3A). The swinging portion 12 is spring-biased in a direction leading the operation arm 121 to the open position Pd.

The transmission arm 122 comes into contact with the transmission portion 13 when the door is closed (see FIG. 3A), and is then pushed by the transmission portion 13 to rotate around the pivot 124 until the car door 101 is fully closed. (See FIG. 3B). Here, the transmission unit 13 moves in translation along the door rail 102 together with the car door 101 according to the opening and closing of the car door 101, and moves from the state immediately before the car door 101 is fully closed to the fully closed state. , which transmits the opening/closing operation of the car door 101 to the swinging portion 12 . In this embodiment, the transmission portion 13 includes a support portion 131 fixed to the door hanger 103 and a roller 132 rotatably supported by the support portion 131 at a height position where contact with the transmission arm 122 is possible. , is composed of

According to the transmission arm 122, the rotation until the car door 101 is fully closed is transmitted to the operation arm 121, and as a result, the operation arm 121 can be reliably rotated to the closed position Pc. In addition, the transmission arm 122 has its rotational range restricted by front and rear stoppers 125A and 125B, and both end positions of the rotational range correspond to the closed position Pc and the open position Pd of the operating arm 121, respectively. . 2 to 3B, the position at which the buffer portion 126A provided on the transmission arm 122 abuts against the stopper 125A corresponds to the closed position Pc of the operation arm 121 and is provided on the transmission arm 122. The position where the buffer portion 126B abuts against the stopper 125B corresponds to the open position Pd of the operating arm 121. As shown in FIG.

Release arm 123 does not prevent transmission arm 122 from moving until transmission arm 122 contacts transmission arm 122 when the door is closed (movement from FIG. 2 to FIG. 3A ). When the transmission arm 122 rotates around the pivot 124, it protrudes into the path of the transmission section 13 as the transmission arm 122 rotates (see FIG. 3B).

According to the release arm 123, when the door is opened from the fully closed state, the release arm 123 is pushed out of the path of the transmission portion 13 by abutting the release arm 123, and the release arm 123 at that time is pushed out. The rotation is transmitted to the operating arm 121, and as a result, the operating arm 121 reliably rotates to the open position Pd. That is, in this embodiment, the release arm 123 and the transmission section 13 function as a release mechanism that reliably releases the state of the swing section 12 in which the detection switch 11 is closed when the door is opened (when the car door 101 is opened). do.

In the mechanism for opening and closing the detection switch 11 using the swinging portion 12, even if the car door 101 is fully closed and the detection switch 11 is closed by the swinging portion 12, an earthquake or the like may occur. When the elevator vibrates due to the influence of , the vibration at that time causes the swinging portion 12 to swing, which may cause the detection switch 11 to open temporarily. If the detection switch 11 is opened while the elevator operation is permitted, even temporarily, the safety control is activated and the elevator is restarted even though the car door 101 is fully closed. An emergency stop may occur, and the user may be trapped in the car.

Therefore, the door closing detection device 1 of the present embodiment further includes a holding portion 14 that holds the state of the swinging portion 12 in which the detection switch 11 is closed by magnetic force. Specifically, the holding portion 14 is composed of two permanent magnets 141 and 142, and the permanent magnets 141 and 142 are brought into contact or close to each other when the operation arm 121 reaches the closed position Pc. They are provided on the transmission arm 122 and the stopper 125A so that they can be attracted to each other by their magnetic force.

According to such a holding portion 14, the state in which the operating arm 121 reaches the closed position Pc (that is, the state of the swinging portion 12 in which the detection switch 11 is closed) is held by the magnetic force. Even if the elevator vibrates, the detection switch 11 is less likely to open due to the vibration at that time. Further, when the door is opened (when the car door 101 is opened), the contact of the transmission portion 13 with the release arm 123 ensures that the operating arm 121 reaches the open position Pd against the magnetic force of the holding portion 14. It can be rotated. Therefore, the state of the oscillating portion 12 in which the detection switch 11 is closed is reliably released when the door is opened. Therefore, according to the door closing detection device 1 of the present embodiment, it is possible to accurately detect the fully closed state of the car door 101 .

In addition, in the holding part 14 described above, the permanent magnet 141 may be changed to a magnetic material that is magnetized by the magnetic field of the permanent magnet 142 . In this case, the transmission arm 122 itself may be made of a magnetic material and a part of the transmission arm 122 may be used as a magnetic body instead of the permanent magnet 141 . Alternatively, the permanent magnet 142 may be changed to a magnetic material magnetized by the magnetic field of the permanent magnet 141 . In this case, the stopper 125A itself may be made of a magnetic material, and a portion of the stopper 125A may be used as a magnetic body instead of the permanent magnet 142.

Further, in the holding portion 14 described above, at least one of the permanent magnets 141 and 142 may be replaced with an electromagnet. In this case, by controlling the magnetic force of the electromagnet, it is possible to generate the magnetic force of the holding portion 14 in accordance with the opening and closing of the detection switch 11 (specifically, only when the detection switch 11 is closed). According to such control, the magnetic force of the holding portion 14 can be extinguished when the door is opened. It becomes possible to move to the position Pd.

The structure of the holding part 14 is not limited to the one described above, and can be installed according to the structure of the detection switch 11 and the swinging part 12 as long as it can hold the state of the swinging part 12 with the detection switch 11 closed by magnetic force. The position, the number of installations, and the like may be changed as appropriate. For example, the oscillating portion 12 is not limited to one that opens and closes the detection switch 11 by oscillating (rotating) about a pivot, but may be changed to one that opens and closes the detection switch 11 by oscillating due to translational movement. Even in such a configuration, by appropriately changing the configuration (installation position, number of installations, etc.) of the holding portions 14, it is possible to hold the state of the swinging portion 12 with the detection switch 11 closed by magnetic force.

[2] Second Embodiment FIGS. 4A and 4B are conceptual diagrams showing a hanger structure for suspending an elevator landing door 201 so as to be able to open and close. Here, FIG. 4A shows the case where the landing door 201 is in the middle of opening and closing, and FIG. 4B shows the case where the landing door 201 is in a fully closed state.

The hanger structure of the hall door 201 is composed of a door rail 202 horizontally arranged on the upper part of the frame constituting the entrance of the hall and a door hanger 203 slidably hung on the door rail 202. - 特許庁In this embodiment, upper rollers 204A are pivotally supported on the left and right sides of the door hanger 203, and the upper rollers 204A are hung on the door rail 202. As shown in FIG. Further, in order to prevent the upper roller 204A from falling off from the door rail 202 and the door hanger 203 from rattling, lower rollers 204B are further pivotally supported on the left and right sides of the door hanger 203 for sandwiching the door rail 202 with the upper roller 204A. It is

In this embodiment, the landing door 201 is provided with a door closed detection device 2 for detecting the fully closed state of the landing door 201 (see FIG. 4B). 21 , a swinging portion 22 and an interlocking mechanism 23 . Further, the door closing detection device 2 of the present embodiment includes a lock mechanism that locks the landing door 201 when the landing door 201 is in a fully closed state. Details of each part of the door closing detection device 2 will be described below. 5A and 5B are conceptual diagrams showing the detection switch 21 and the swinging portion 22 of the door closing detection device 2, respectively. 6A and 6B are diagrams showing a series of operations of the door closing detection device 2. FIG.

The detection switch 21 has an exterior case 210, two terminals 211 and 212 installed in the exterior case 210, and a base 213 to which these terminals are fixed (see FIG. 5A). The detection switch 21 is fixed to the upper part of the frame that constitutes the entrance/exit of the landing (see FIG. 4A). An opening 210a into which the tip of the moving part 22 is inserted is provided (see FIG. 4B). Further, in the detection switch 21, when the landing door 201 is fully closed, the conductive portion 223 of the swinging portion 22, which will be described later, contacts both the terminals 211 and 212, and as a result, the terminals 211 and 212 are closed. It is configured to be short-circuited via the conductive portion 223 (see FIG. 6B). According to such a detection switch 21, it is detected that the landing door 201 is in a fully closed state when the terminals 211 and 212 are short-circuited (that is, the detection switch 21 is closed).

The swinging portion 22 is a portion that swings according to the opening/closing operation of the landing door 201 and closes the detection switch 21 when the landing door 201 is fully closed. In this embodiment, the swinging portion 22 has an operation arm 221, and the operation arm 221 is configured to swing (rotate) up and down around a pivot 222 provided on the door hanger 203 (Fig. 4(A) and FIG. 5(B)). Specifically, a conductive portion 223 for short-circuiting the terminals 211 and 212 is provided at the tip of the operating arm 221 , and the operating arm 221 closes the detection switch 21 by short-circuiting the terminals 211 and 212 . and the open position Qd (see FIG. 6A) moved upward from the closed position Qc (see FIG. 6A). movement) is possible. The swinging portion 22 is spring-biased in a direction to guide the operating arm 221 to the closed position Qc.

A locking projection 224 is provided on the operating arm 221 . Here, the locking protrusion 224 is opened when the operation arm 221 reaches the closed position Qc and the terminals 211 and 212 are short-circuited (that is, when the detection switch 21 is closed, see FIG. 6B). The landing door 201 is configured to be locked by being caught by the edge 210b of the portion 210a. According to such a configuration, it is possible to detect that the landing door 201 is locked by the fact that the terminals 211 and 212 are short-circuited (that is, the detection switch 21 is closed).

The interlocking mechanism 23 is a mechanism for opening and closing the hall door 201 in conjunction with the opening and closing of the car door 101, and includes a first roller 231 and a second roller 232 provided on the swinging portion 22 of the hall and a roller 232 provided on the car. The clamping portions 15A and 15B are configured. Here, the first roller 231 is a roller arranged coaxially with the pivot 222 . The second roller 232 has the same diameter or a smaller diameter than the first roller 231 and is pivotally supported by the operation arm 221 at a position different from the pivot 222 . The clamping portions 15A and 15B are portions that clamp the first roller 231 when the car door 101 is opened and closed. Then, the second roller 232 is pushed by the pinching portion 15A when the first roller 231 is pinched by the pinching portions 15A and 15B (when the state is shifted from FIG. 6B to FIG. 6A). is pivotally supported on the operation arm 221 so as to move around the pivot shaft 222 with the arm, thereby rotating the operation arm 221 from the closed position Qc to the open position Qd.

According to the interlocking mechanism 23, the operation arm 221 is moved from the closed position Qc to the open position Qd by sandwiching the first roller 231 between the sandwiching portions 15A and 15B, thereby closing the detection switch 21 and moving the swinging portion 22. can be reliably released, and at the same time, the locking of the hall door 201 can also be released. In other words, the interlocking mechanism 23 also functions as a release mechanism that reliably releases the state of the swinging portion 22 in which the detection switch 21 is closed (or the landing door 201 is locked) when the door is opened.

In this way, in the mechanism that opens and closes the detection switch 21 using the swinging portion 22, even if the landing door 201 is fully closed and the detection switch 21 is closed by the swinging portion 22, an earthquake or the like may occur. When the elevator vibrates due to the influence of , the vibration at that time causes the swinging portion 22 to swing, and the detection switch 21 may be temporarily opened. If the detection switch 21 is opened while elevator operation is permitted, even temporarily, the safety control is activated and the elevator is in an emergency state regardless of whether the hall door 201 is fully closed. There is a risk that the car will stop and the user will be trapped in the car.

Therefore, the door closing detection device 2 of the present embodiment further includes a holding portion 24 that holds the state of the swinging portion 22 in which the detection switch 21 is closed by magnetic force. Specifically, the holding portion 24 is composed of two permanent magnets 241 and 242, and the permanent magnets 241 and 242 are closed when the operation arm 221 reaches the closed position Qc and the terminals 211 and 212 are short-circuited. In this case, the operation arm 221 and the detection switch 21 are provided so that they can come into contact with each other or come close to each other and be attracted to each other by their magnetic force. As an example, the permanent magnet 241 is provided at the tip of the operation arm 221 (see FIG. 5(B)), and the permanent magnet 242 contacts or approaches the permanent magnet 241 when the detection switch 21 is closed. It is provided on the base 213 of the switch 21 (see FIGS. 5A and 6B). Note that the permanent magnet 242 may be provided at the terminal 211 of the detection switch 21 or the like.

According to such a holding portion 24, the state in which the operation arm 221 reaches the closed position Qc and the terminals 211 and 212 are short-circuited (that is, the state of the swinging portion 22 in which the detection switch 21 is closed) is held by the magnetic force. Therefore, even if the elevator vibrates due to the influence of an earthquake or the like, the detection switch 21 is less likely to open due to the vibration at that time. Further, when the door is opened (when the landing door 201 is opened), the operating arm 221 is reliably rotated to the open position Qd against the magnetic force of the holding portion 24 by the interlocking mechanism 23 (release mechanism). can be done. Therefore, the state of the oscillating portion 22 in which the detection switch 21 is closed is reliably released when the door is opened. Therefore, according to the door closing detection device 2 of this embodiment, it is possible to accurately detect the fully closed state of the hall door 201 .

In addition, in the holding part 24 described above, the permanent magnet 241 may be changed to a magnetic material that is magnetized by the magnetic field of the permanent magnet 242 . In this case, the operating arm 221 itself may be made of a magnetic material and a part of the operating arm 221 may be used as a magnetic body instead of the permanent magnet 241 . Alternatively, the permanent magnet 242 may be changed to a magnetic material magnetized by the magnetic field of the permanent magnet 241 . In this case, part of the component parts (such as the base 213 ) of the detection switch 21 may be made of a magnetic material and used as a magnetic body instead of the permanent magnet 242 .

Further, in the holding portion 24 described above, at least one of the permanent magnets 241 and 242 may be replaced with an electromagnet. In this case, by controlling the magnetic force of the electromagnet, it is possible to generate the magnetic force of the holding portion 24 according to the opening and closing of the detection switch 21 (specifically, only when the detection switch 21 is closed). According to such control, the magnetic force of the holding portion 24 can be extinguished when the door is opened. It becomes possible to move to the position Qd.

The structure of the holding part 24 is not limited to the one described above, and it can be installed according to the structure of the detection switch 21 and the swinging part 22 as long as it can hold the state of the swinging part 22 with the detection switch 21 closed by magnetic force. The position, the number of installations, and the like may be changed as appropriate. For example, the oscillating portion 22 is not limited to one that opens and closes the detection switch 21 by oscillating (rotating) about a pivot, but may be changed to one that opens and closes the detection switch 21 by oscillating due to translational movement. Even in such a configuration, by appropriately changing the configuration (installation position, number of installations, etc.) of the holding portions 24, it is possible to hold the state of the swinging portion 22 with the detection switch 21 closed by magnetic force.

The description of the above-described embodiments should be considered illustrative in all respects and not restrictive. The scope of the invention is indicated by the claims rather than the above-described embodiments. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and range of equivalents of the claims.

1 Door closing detection device 11 Detection switch 12 Swing part 13 Transmission part 14 Holding part 15A, 15B Holding part Pc Closed position Pd Open position 101 Car door 102 Door rail 103 Door hanger 104A Upper roller 104B Lower rollers 111, 112 Terminal 113 Operation part 121 Operation arm 122 Transmission arm 123 Release arm 124 Pivot shafts 125A, 125B Stoppers 126A, 126B Buffer part 131 Support part 132 Rollers 141, 142 Permanent magnet 2 Door closing detection device 21 Detection switch 22 Swing part 23 Interlocking mechanism 24 Holding part Qc Close Position Qd Open position 201 Hall door 202 Door rail 203 Door hanger 204A Upper roller 204B Lower roller 210 Exterior case 210a Opening 210b Edges 211, 212 Terminal 213 Base 221 Operation arm 222 Pivot 223 Conductive part 224 Locking projection 231 First roller 232 2 rollers 241, 242 permanent magnet

Claims (2)

a detection switch for detecting that the elevator door is fully closed;
A swinging portion that swings according to the opening/closing operation of the door, closes the detection switch when the door is in the fully closed state, and is elastically urged in the direction of opening the detection switch. a swinging part;
a mechanism for moving the swinging portion to a closed position that closes the detection switch against the elastic force;
a holding portion that holds the state of the swinging portion in which the detection switch is closed by magnetic force;
with
The elevator door, wherein the state of the swinging portion in which the detection switch is closed is maintained by the force of the mechanism that moves the swinging portion to the closed position against the elastic force, and the magnetic force. Close detection device. 2. The elevator door closing detector according to claim 1 , further comprising a release mechanism for releasing the state of said swinging portion in which said detection switch is closed against the magnetic force of said holding portion when said door is opened. .

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