JP2017137675A - Closed door detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closed door detector that has high accuracy of detecting an open/close door and is capable of reducing a cost of manufacture.SOLUTION: A closed door detector for detecting a closed door state of a door 2 on which an electric lock 1 is fixed includes: a trigger 5, a magnet 6, and a magnetic force adjustment part 7 arranged on a strike 4 into/from which a locking body 3 of the electric lock 1 advances/retreats; and a magnetic detection element 8 disposed on the electric lock 1. The trigger 5 freely advances and retreats from the surface of the strike 4 and is energized in the projection direction; the magnetic force adjustment part 7 is formed so that changing the state of a magnetic flux discharged from the surface of the strike 4 from a state in which detection by the magnetic detection element 8 at a lockable position of the electric lock 1 is disabled to a state in which the detection is enabled is possible in synchronization with degeneration operation of the trigger 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a door closing detection device.

  As a door closing detection device used for detecting whether or not a door is in a closed state when an electric lock is locked and unlocked, one disclosed in Patent Document 1 is known.

  In this conventional example, the detection device includes a trigger rod that advances and retreats from the case of the electric lock, a connection lever that is rotationally driven as the trigger rod advances and retreats, and a permanent drive that is rotationally driven by the rotation of the connection lever. A magnet and a magnetic sensing element are accommodated and formed.

  When the door is closed, the trigger rod comes into contact with the strike and is immersed in the electric lock, and accordingly, the permanent magnet is rotationally driven to a position where it can be detected by the magnetic detecting element, and the closed state is detected.

JP 2012-214999 A

  However, in the above-described conventional example, since the permanent magnet and the magnetic sensing element are arranged in the same casing and within a detectable range when rotated, the ON and OFF thresholds in the magnetic sensing element are set. It is necessary to set strictly, and there is a drawback that the manufacturing cost for the strict management of the dimensions of each part and the detection accuracy are in a trade-off relationship.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide a door closing detection device that has high door opening detection accuracy and can reduce manufacturing costs.

  Another object of the present invention is to provide a strike for an electric lock that can be used for the above-described closing detection device.

According to the invention, the object is
A door closing detection device for detecting a door closing state of the door 2 to which the electric lock 1 is fixed,
A trigger 5, a magnet 6, and a magnetic force adjustment unit 7 disposed in a strike 4 in which the locking body 3 of the electric lock 1 advances and retracts;
A magnetic detection element 8 disposed on the electric lock 1;
The trigger 5 is movable forward and backward from the surface of the strike 4 and biased in the protruding direction,
The magnetic force adjusting unit 7 can change the magnetic flux emitted from the surface of the strike 4 in a position where the electric lock 1 can be locked from a state incapable of being detected by the magnetic detection element 8 in synchronism with the contraction operation of the trigger 5. This is accomplished by providing a formed door closing detection device.

  In the present invention, the magnetic detection element 8 is attached to the electric lock 1 fixed to the door 2, and the strike 4 from which the lock 3 of the electric lock 1 is engaged and disengaged is released from the surface of the strike 4 by the magnet 6. A magnetic force adjusting unit 7 that adjusts the magnetic flux and a trigger 5 that moves forward and backward from the surface of the strike 4 are arranged.

  The trigger 5 is urged in the protruding direction and can move forward and backward from the surface of the strike 4, and the magnetic force adjusting unit 7 can detect whether the magnetic flux emitted from the surface of the strike 4 can be detected or not as the trigger 5 moves forward and backward. Vary between.

  The magnetic force adjusting unit 7 can adopt various known structures as long as the magnetic flux emitted from the surface of the strike 4 can be adjusted. For example, a magnetic shield such as an iron plate is provided between the magnet 6 and the surface of the strike 4. This can be realized simply by moving the wall back and forth, or by retracting the magnet 6 from the shield area by the magnetic shield wall. In this case, it is not necessary for the magnetic shield wall to completely absorb the magnetic flux of the magnet 6, and it is sufficient to reduce the magnetic flux emitted from the magnet 6 to a level in which it cannot be detected by the magnetic detection element 8 in the shield state. There is no need to use expensive materials such as neodymium.

  Further, the magnetic force adjusting unit 7 can be realized without using a magnetic shield wall. In this case, the magnet 6 is moved away from or on the strike 4 surface, or the magnet 6 is rotated. The magnetic pole position having a high magnetic flux density can be moved away from and on the strike 4 surface.

  Therefore, in the present invention, the magnet 6 is disposed on the strike 4 and is configured to detect by the magnetic detection element 8 on the electric lock 1 side, so that the mechanical approach between the door 2 and the strike 4 is caused by the magnetic detection element 8. Since it becomes a detection condition, it becomes possible to completely prevent erroneous detection in the opened state without excessively increasing the accuracy of the magnetic detection element 8.

  In addition, since the magnetic flux emitted from the surface of the strike 4 can be detected by the magnetic detection element 8 due to the immersion of the trigger 5, the operation of the mechanical trigger 5 is substantially added to the determination condition of the lockable state. It has become. For this reason, the detection threshold value of the magnetic detection element 8 can be managed with higher accuracy than when the magnet 6 arranged in the strike 4 is detected by the magnetic detection element 8 on the electric lock 1 side and the lockable state is set. And high detection accuracy can be obtained.

  Furthermore, since the magnet 6, the magnetic force adjusting unit 7, and the trigger 5 are arranged on the strike 4 side where sufficient space can be taken and only the magnetic detection element 8 is arranged on the electric lock 1 side, Space can be used effectively.

As another aspect of the present invention for achieving the above object,
A door closing detection device for detecting a door closing state of the door 2 to which the electric lock 1 is fixed,
A trigger 5 disposed on a strike 4 in which the locking body 3 of the electric lock 1 advances and retreats, and a magnet 6;
A magnetic detection element 8 disposed on the electric lock 1;
The trigger 5 is urged in a protruding direction from the surface of the strike 4, and the magnet 6 is synchronized with the advance / retreat operation of the trigger 5, and an initial position corresponding to the protruding state of the trigger 5 and the strike 4 of the trigger 5. Corresponding to the immersion state, a door closing detection device can be configured that is driven between the lockable position of the electric lock 1 and a detection position where detection by the magnetic detection element 8 is possible.

Furthermore, as another aspect of the present invention for achieving the above object,
The magnetic detection element 8 uses a Hall IC that detects the magnetic pole of the magnet 6, and
The magnet 6 is rotationally driven by the advance / retreat operation of the trigger 5, and can constitute a door closing detection device that moves between an initial position and a detection position where the magnetic pole directly faces the Hall IC.

  A reed switch or the like can be used as the magnetic detection element 8, but in this case, there is an OFF signal output region in the region where the magnetic pole overlaps the overlapped portion of the lead piece, and further ON in the region sandwiching it. Since the signal output range exists, it is necessary to set the movement path of the magnet 6 so that there is no ON signal output on the movement path from the initial position of the magnet 6 to the detection position or on the return path to the initial position. is there.

  On the other hand, in the present invention in which a Hall IC is used as the magnetic detection element 8 and the magnet 6 is rotated to move the magnetic pole to a detection position facing the Hall IC, the magnetic pole approaches the operation pattern of the Hall IC. Since there is no OFF signal output area in the process, high detection accuracy can be maintained without excessively managing the rotation center position accuracy, and the rotation drive of the magnet 6 is generally simple. Since it is realizable with a structure, a manufacturing cost can also be reduced.

Furthermore, as another aspect of the present invention for achieving the above object,
The magnet 6 may constitute a door closing detection device that is driven to the detection position when the immersion dimension of the trigger 5 reaches a predetermined value, and then held at the detection position with respect to the subsequent immersion operation of the trigger 5. it can.

  In the present invention, even if the trigger 5 is immersed after a predetermined amount of immersion of the trigger 5 and the magnet 6 has moved to the detection position, the magnet 6 is held at the detection position without following the immersion operation of the trigger 5. . As a result, a detection clearance is set in a direction exceeding the set immersion depth, and this clearance is absorbed by the accuracy of mounting of the strike 4 or the electric lock 1 or between the door 2 and the door frame. Can be used to absorb dimensions.

In addition, the above detection devices include
An electric lock strike that is fixed to the door 2 and that engages and disengages the locking body 3 of the electric lock 1 that includes the magnetic detection element 8 inside.
A trigger 5 that is urged in a direction protruding from the surface of the strike box 9 having a depth in the depth direction and is mounted in the strike box 9 so as to freely advance and retract;
In synchronization with the forward / backward movement of the trigger 5, the magnetic detection element 8 corresponds to the initial position corresponding to the protruding state of the trigger 5 and the retracted state of the trigger 5 into the strike box 9. An electric lock strike having a magnet 6 driven between a detection position where detection by the
in this case,
A rack portion 10 is formed on the trigger 5, and
The magnet 6 is elastically held in a synthetic resin magnet case 12 in which a pinion portion 11 that meshes with the rack portion 10 is formed, and is moved between an initial position and a detection position as the trigger 5 moves back and forth. An electric lock strike that is rotationally driven can be configured.

  According to the present invention, since the magnet is disposed on the strike and the magnetic detection element is disposed on the electric lock, the detection of the magnet by the magnetic detection element in the opened state is completely prevented, and the detection condition of the magnet is the trigger Therefore, the open / close door detection accuracy can be increased.

It is a figure which shows this invention. It is a figure which shows the strike for electric locks, (a) is the sectional view on the 2A-2A line of (b), (b) is a front view, (c) is a perspective view of a trigger part. It is a disassembled perspective view of the strike for electric locks. It is a figure which shows the principal part of the strike for electric locks, (a) is a figure which shows a trigger and a magnet case, (b) is a figure which shows a magnet when a trigger is a protrusion state, (c) is a figure which a magnet reaches a detection position. The figure which shows the state of a trigger at the time of doing, (d) is a figure which shows the state of a magnet when a trigger is completely immersed. It is a figure which shows an electric lock. It is a figure which shows the electric lock of a locked state, (a) is a side view, (b) is a 6B direction arrow directional view of (a).

  An embodiment of the present invention employed in an electric lock 1 for sliding doors is shown in FIG. The door closing detection device of the present invention has an electric lock 1 fixed to a sliding door (door 2) and a strike 4 fixed to a door frame 13. The electric lock 1 has a Hall IC as a magnetic detection element 8. A magnet 6 is disposed on the strike 4.

  As shown in FIG. 1, when the door 2 is moved to the closed position, that is, when the lock body 3 (in this example, the dead bolt) of the electric lock 1 is moved to a position where it can be locked to the strike 4, the Hall IC 8 sends a door detection signal. The data is output and transmitted to the lock control device 15 for the user to operate the electric lock 1 through the connector 14.

  When receiving a locking operation from the user, or when the lock control device 15 is set to an automatic locking operation, the lock control device 15 performs the strike 4 by subjecting the locking operation to the output of the door closing detection signal from the Hall IC 8. The dead bolt is prevented from being driven at a position where it cannot be locked.

  As shown in FIGS. 2 and 3, the strike 4 is formed by accommodating a trigger 5 and a magnet 6 in a box-shaped strike box 9 having a depth direction in the front-rear direction. The trigger square hole 16a and the strike square hole 16b are closed by the opened front plate 16. In the following description, the upper side in FIG. 1 will be referred to as “upper”, the left side of FIG. 1 will be described for the electric lock 1, and the right side will be described as “front” for the strike 4.

  As shown in FIG. 3, the trigger 5 has rack portions 10 on both side walls of the trigger main body 5 a, and in order to prevent catching clothes or the like in a state of protruding from the strike 4, the tip of the trigger main body 5 a The part is formed into a tapered triangular shape in plan view and side view, with both side surfaces and upper surface being inclined surfaces 5b. In addition, the inclined surfaces 5b on both side surfaces of the trigger main body 5a are in contact with the door 2 that closes when the strike 4 and the electric lock 1 are used for the opening door 2 to obtain a component force in the immersion direction. It becomes a surface.

  The trigger 5 is held movably in the front-rear direction in a trigger case 17 connected to a case half 17a divided in the left-right direction. As shown in FIG. 2 (a), the trigger 5 is biased forward by a compression spring 18, and the trigger body 17 is fixed in the strike box 9, and the front end of the trigger body 5 a is the front plate 16. It protrudes from the trigger square hole 16a (refer FIG.2 (c)).

  On the other hand, the magnet 6 is held in a trigger case 17 while being held by a synthetic resin magnet case 12 constituting the magnetic force adjusting unit 7. As shown in FIGS. 2 and 3, the magnet case 12 is formed in a box shape that can accommodate the magnet 6, and the locking claw 12 a formed on the open end edge is elastically locked to the magnet 6 to cause an internal magnet. 6 dropout is regulated.

  The magnet case 12 has pinion portions 11 on the left and right side wall portions, and the shaft portion 12b protruding from the center of the pinion portion 11 is fitted into the bearing recess portion 17b of the trigger case 17, thereby The case 17 is held rotatably.

  In a state where the trigger 5 and the magnet case 12 are mounted on the magnet case 12, as shown in FIG. 4, the pinion portion 11 and the rack portion 10 are engaged with each other, and the magnet case 12 corresponds to the advance / retreat of the trigger 5. Rotate. The relationship between the advance / retreat of the trigger 5 and the rotation position of the trigger 5 is as follows. When the trigger 5 is in the protruding state shown in FIG. 4B, the magnet case 12 is held at the initial position with the bottom wall facing downward. The bottom wall rotates to a detection position where the bottom wall faces the front plate 16 in a state of being immersed to a predetermined protrusion amount (L) shown in c).

  Further, the rack portion 10 of the magnet case 12 is formed only in a range in which it engages with the pinion portion 11 of the magnet case 12 until the protrusion amount of the trigger 5 reaches (L), and the magnet case 12 is shown in FIG. ) Until the trigger 5 is completely immersed, as shown in FIG. 4D.

  In this example, the magnet 6 is accommodated in the magnet case 12 with the S pole facing the bottom wall, and the S pole faces the front plate 16 in the state of FIG.

  Further, a locking body 19 is fixed to the strike box 9. The locking body 19 includes a sickle locking piece 19a and mounting pieces 19b that are folded back on both side edges of the sickle locking piece 19a. The mounting piece 19b is engaged with the bottom wall of the strike box 9 and the front plate 16. Stop and fix.

  On the other hand, as shown in FIG. 5, the electric lock 1 includes a motor 21 as an actuator disposed in a lock case 20, a lock rotating body 22, and a dead drive link for driving the dead bolt 3. 23.

  A rotating plate 24 is connected to the lock rotating body 22, and the power of the motor 21 is transmitted to the gear train 25, the first and second links 26, 27 to rotate the rotating plate 24.

  The first link 26 and the second link 27 are connected by a pair of pins, and the other end of the first link 26 is slidable in a long hole gear guide 25b formed in the final gear 25a of the gear train 25. And the other end of the second link 27 is rotatably connected to the rotary plate 24, and the connection point of the first and second links 26 and 27 is a long hole link formed in the lock case 20. The guide hole 20a is slidably connected.

  On the other hand, the dead bolt 3 is slidable in the front-rear direction, and a dead drive pin 28 is slidably inserted into a drive guide 3 a provided in the dead bolt 3 that is long in the vertical direction.

  The dead drive pin 28 is fixed to the other end of the dead drive link 23 connected to the rotary plate 24 at one end, and is slidable on a pin guide 20b provided in the lock case 20 in the front-rear direction. Inserted.

  Therefore, in this embodiment, when the motor 21 is rotated in the locking direction from the unlocked state in which the dead bolt 3 is housed in the lock case 20 as shown in FIG. 5, the final gear 25a of the gear train 25 is counterclockwise. As shown in FIG. 6, the first and second links 26 and 27 are pulled upward, and the rotating plate 24 rotates counterclockwise.

  As the rotary plate 24 rotates, the dead drive pin 28 fixed to the dead drive link 23 moves forward, and the dead bolt 3 is pushed out in the protruding direction to shift to the locked state.

  Further, the front end of the pin guide 20b extends downward, and the dead drive pin 28 falls into the extended portion 20c of the pin guide 20b as the dead bolt 3 moves to the locked state. The movement of the bolt 3 to the unlocked state is restricted.

  Further, as shown in FIG. 6B, the dead bolt 3 is formed by sandwiching a sickle member 29 between blades of a dead body 3b obtained by bending a steel plate into a U-shape. The sickle member 29 is formed by protruding a locking hook portion 29a at the front end and a cam projection 29b at the rear end so as to protrude downward, and rotates around the sickle rotation shaft 29c at the front end portion of the dead body 3b. Connected freely.

  The sickle member 29 is given a counterclockwise rotational moment in FIG. 5 by adjusting the center of gravity, and when the dead bolt 3 is unlocked, the cam guide 20d having a cam projection 29b formed on the lock case 20 is provided. By being supported on the top, the locking hook portion 29a is held in a posture in which the tip is accommodated in the dead body 3b.

  When the dead bolt 3 is moved to the locking position from this state, the cam projection 29b of the sickle member 29 loses the support of the cam guide 20d, so that the sickle member 29 rotates counterclockwise as shown in FIG. As shown in FIG. 1, the locking hook portion 29a moves downward from the tip of the dead body 3b, and as shown in FIG. 1, the locking hook portion 29a is locked to the sickle locking piece 19a of the strike 4 to move the door 2. regulate.

  When the motor 21 is driven in the unlocking direction from the above-described locked state, the rotating plate 24 is driven to rotate clockwise from FIG. 6A, and accordingly, the dead live pin 28 is once driven upward to pin guide 20b. Then, the dead bolt 3 is moved backward to shift to the unlocked posture. As the dead bolt 3 moves to the unlocking position, the cam projection 29b of the sickle member 29 rides on the cam guide 20d, so that the sickle member 29 rotates clockwise around the sickle rotating shaft 29c, and the unlocking of FIG. Return to the locked state.

  Further, the lock rotating body 22 to which the rotary plate 24 is connected is provided with a cylinder lock (not shown) or a shaft insertion hole 22a for inserting the rotation shaft of the thumb turn device. Can be operated. A coil spring 30 that operates as a click spring is interposed between the rotating plate 24 and the lock case 20 in order to give a sense of moderation at the locking / unlocking position when operating with a cylinder lock or the like.

  The Hall IC 8 is mounted on a mounting board (not shown) and is disposed on the front wall of the lock case 20. As shown in FIG. 1, the Hall IC 8 is disposed at a position facing the magnet 6 when the magnet 6 rotates to the detection position, and in this state, the Hall IC 8 is adjusted to output ON by the magnetic flux of the magnet 6. The

  In addition, in the above, although embodiment which applied this invention to the sliding door was shown, it is also possible to apply to a hinged door, In this case, the electric lock 1 uses the same thing as the above-mentioned, and strikes. 4 can be used by replacing the locking body 19 and reducing the strike square hole 16b of the front plate 16 to such an extent that the dead bolt 3 can be inserted.

DESCRIPTION OF SYMBOLS 1 Electric lock 2 Door 3 Locking body 4 Strike 5 Trigger 6 Magnet 7 Magnetic force adjustment part 8 Magnetic detection element 9 Strike box 10 Rack part 11 Pinion part 12 Magquette case

Claims (7)

A door closing detection device for detecting a door closing state of a door to which an electric lock is fixed,
A trigger, a magnet, and a magnetic force adjustment unit arranged in a strike in which the locking body of the electric lock advances and retracts;
A magnetic detection element disposed on the electric lock;
The trigger is movable forward and backward from the strike surface and biased in the protruding direction,
The magnetic force adjusting unit is configured to detect the closing of the door so that the magnetic flux emitted from the strike surface can be changed from a non-detectable state to a detectable state by the magnetic detection element at a lockable position of the electric lock in synchronization with the contraction operation of the trigger. apparatus. A door closing detection device for detecting a door closing state of a door to which an electric lock is fixed,
A trigger disposed on a strike in which the locking body of the electric lock advances and retreats, and a magnet;
A magnetic detection element disposed on the electric lock;
The trigger is urged in a protruding direction from the strike surface, and the magnet corresponds to an initial position corresponding to the protruding state of the trigger and an immersion state of the trigger in synchronization with the advance / retreat operation of the trigger. A door closing detection device driven between a detection position where detection by the magnetic detection element is possible at a lockable position of the electric lock. The magnetic detection element uses a Hall IC that detects the magnetic pole of the magnet,
The door closing detection device according to claim 2, wherein the magnet is rotationally driven by an advance / retreat operation of a trigger and moves between an initial position and a detection position where a magnetic pole faces the Hall IC.   The door closing detection device according to claim 2, wherein the magnet is driven to a detection position when the immersion dimension of the trigger reaches a predetermined value, and then held at the detection position with respect to a subsequent immersion operation of the trigger. An electric lock strike that is fixed to the door and that engages and disengages the lock body of the electric lock with a magnetic detection element inside.
A trigger that is urged in a direction protruding from the surface of the strike box having a depth in the depth direction and is mounted so as to be able to advance and retract in the strike box;
In synchronization with the advance / retreat operation of the trigger, the initial position corresponding to the protruding state of the trigger and the immersion state of the trigger in the strike box can be detected by the magnetic detection element at the lockable position of the electric lock. An electric lock strike having a magnet driven between detection positions. A rack portion is formed on the trigger,
The magnet is resiliently held in a synthetic resin magnet case in which a pinion portion meshing with the rack portion is formed, and is driven to rotate between an initial position and a detection position in accordance with a forward / backward movement of the trigger. Item 6. A strike for an electric lock according to Item 5. A door closing detection device for detecting a door closing state,
A trigger, a magnet, and a magnetic force adjustment unit disposed on the door frame of the door;
A magnetic detection element disposed on the door,
The trigger is movable forward and backward from the strike surface and biased in the protruding direction,
The magnetic force adjusting unit is configured to change the emitted magnetic flux from the door frame surface in synchronization with the contraction operation of the trigger so that the magnetic detecting element can be changed from a non-detectable state by the magnetic detection element in a closed state of the door. .

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