JP5177645B2 - Control device for drive shaft drive mechanism of electric lock - Google Patents

Description

  The present invention relates to a control device for a drive shaft drive mechanism of an electric lock.

  In FIG. 1 of Patent Document 1, the tip of a movable contact piece (actuator) constituting the first changeover switch 37 is engaged in a recess formed on the peripheral surface of the drive plate 21 in the drive box of the electric lock. Matters are described (reference numbers are those of the publication). Further, FIG. 1 of Patent Document 2 shows a lock in which first and second changeover switches each having a movable contact piece (actuator) are arranged in the horizontal direction above the dead bolt, and the dead bolt protrudes from the lock box. The matter which acquires the signal of an unlocking state which the state and the deadbolt moved backward in the lock box is described.

  As described in Patent Document 1, Patent Document 2, etc., when detecting the applied / unlocked state of the electric lock (the position of the dead bolt or the position of the thumb turn knob), the movable contact of the contact type switch is used. In general, the tip of the piece is engaged with an engaging portion of a rotary drive plate or a protrusion provided on a dead bolt. In addition, as another method for detecting the applied / unlocked state of the electric lock, a so-called Hall element is used.

By the way, although not in the technical field of electric locks, there is one using a so-called photosensor without using a contact type switch or a Hall element. Patent Document 3, Patent Document 4, and the like. Patent Document 3 relates to a medicine storage, and paragraphs 0019 and FIG. 7 describe matters in which a photo sensor is disposed on a bulging portion 38 of a rotating body 33 constituting a lock device for drawer. ing. Patent document 4 relates to a power supply device for a private room such as a hotel. In paragraphs 0027 to 009 and FIG. 3, whether or not the accommodation card P is inserted into a loading having a photosensor in the decorative cover 3 is shown. The matter of detecting and turning on or off the power supply in the room is described.
Japanese Utility Model Publication No. 61-189949 JP-A-4-368580 Japanese Patent No. 3263416 JP 2001-16773 A

  In the technical field of electric locks, both stable position detection and space saving in the drive box can be achieved when detecting the applied / unlocked state (dead bolt position or thumb-turn position) of the electric lock. However, the system using the movable contact piece of the contact type switch cannot satisfy the problem of the invention. In addition, when a contact type or hall element type is used as a signal detection method, a plurality of microswitches and a dedicated substrate for detection signals must be arranged in the drive box, and detection of position accuracy. There are problems such as inability to improve. Accordingly, an intended object of the present invention is to stably acquire a drive stop signal for a drive motor and completely prevent the drive motor from being burned. The second purpose is that the drive box can be reduced in size, the internal space of the drive box can be effectively utilized, the location of the dead bolt, the position of the drive plate, etc. are not considered. The advantage is that the sensor can be easily built in.

The control device for the drive shaft drive mechanism of the electric lock according to the present invention includes a drive shaft drive mechanism that includes a drive motor that faces the free end portion of the door and includes an electric lock, and has no dead bolt. A control device for a drive shaft drive mechanism of an electric lock provided with a rotating body having a sensor identification portion attached to a drive shaft rotatably supported by the drive box of the electric lock, while the rotation It is disposed against the outer surface of the body, and provided with a sensor support body provided with a photosensor for detecting the positional state of the sensor identification unit in the drive box, in the drive box or at a position outside the driving box A control unit is provided that acquires a detection signal output from the photosensor and controls driving of the drive motor.

  Here, the “drive shaft of the electric lock” is a rotary shaft that rotates by the driving force of the drive motor and has a thumb turn-side dharma or cylinder lock-side dharma attached to the inner end of the shaft. It refers to a rotating shaft or the like that rotates and has a thumb turn-side dharma attached to its inner end.

(A) The drive stop signal for the drive motor can be stably acquired, and the drive motor can be completely prevented from being burned.
(B) The drive box can be reduced in size, the internal space of the drive box can be effectively utilized, the dead bolt installation location, the position of the drive plate, etc. are not taken into consideration, and the sensor is moved into the drive box. Can be easily incorporated.

  Hereinafter, the best mode for carrying out the present invention shown in FIGS. 1 to 9 will be described.

(1) Environment for Implementing the Invention First, FIG. 1 is a schematic explanatory diagram showing the environment for implementing the invention. In FIG. 1, reference numeral 1 denotes a door provided at the entrance / exit of a building entrance, an entrance / exit of a room, and the like. An internal drive box 2 is impositioned via a case-like mounting seat 3. With reference to FIG. 1, reference numeral 4 is a room.

  Therefore, in this embodiment, the thumb turn knob 6 is attached to the right protruding end portion 5a of one drive shaft 5, while the left protruding end protruding into the inside (inside the cavity) 8 of the free end portion of the door 1 is provided. A dharma 7 having a driving arm is attached to the portion 5b. Although not particularly illustrated, a dead bolt retracting mechanism including a lock box constituting the electric lock, the dharma 7, a dead bolt, and the like is provided in the hollow portion 8 at the free end of the door 1.

(2) Specific Requirements of the Present Invention Next, specific requirements of the present invention will be sequentially described with reference to FIG. 2 to FIG. 2 is a schematic cross-sectional explanatory view showing the internal structure of the main part of FIG. FIG. 3 schematically shows a state in which the drive shaft drive mechanism X is incorporated in the drive box 2.

  The positional relationship of the members constituting the drive shaft drive mechanism X will be described with reference to FIGS. Before that, the drive box 2 which is a component of the drive shaft drive mechanism X is, in this embodiment, a case main body 2a which is divided in half in the longitudinal direction, and a case body 2a which can be freely attached to and detached from or fixed to the case main body 2a. And a lid 2b that is coupled via the. The case body 2a is fixed to the inner wall surface 1a of the door 1 as shown in FIG. The structure of the drive box 2 is also a new matter, but since it is not a specific requirement of the present invention, its details are omitted.

  Now, with reference to FIGS. 2 and 3, the drive motor (for example, a micro motor) 11 is vertically incorporated in the lower storage space 12 of the drive box 2, and its output shaft protrudes upward. An unnumbered original gear is attached to the output shaft of the drive motor 11. On the other hand, the drive shaft 5 is horizontally installed in the upper storage space 13 of the drive box 2, and both end portions 5 a and 5 b protrude from the left and right side walls of the drive box 2 by a required amount.

  In addition, the drive shaft 5 of this embodiment is not provided with a drive shaft for mounting the thumb turn knob 6 and a drive shaft for mounting the dharma 7 separately, but is “one” as shown in FIG. is there. A clutch mechanism Y and a rotating plate 14 having a sensor identification portion are attached to the single drive shaft 5.

  In FIG. 2, the clutch mechanism Y is mounted in the drive box 2 on the left side of the drive shaft 5, while the rotating plate 14 is mounted in the drive box 2 on the right side of the drive shaft 5. Has been. In other words, the clutch mechanism Y is located on the case body 2 a side of the drive box 2, while the rotating plate 14 is located on the sensor identifying portion and the lid 2 b side of the drive box 2.

  Further, as shown in FIG. 3, a plurality of transmission gears 16 for transmitting the driving force of the drive motor 11 are disposed between the original gear of the drive motor 11 and the torque limiter 15 constituting the clutch mechanism Y. Yes. The transmission gear 16 is appropriately configured by, for example, a first gear 16a meshing with an original gear, a second gear 16b interposed between the first gear 16a and the torque limiter 15, and the like. The details of the transmission gear 16 are omitted because they are well known and commonly used.

Further, as shown in FIG. 2 and FIG. 3, the position of the sensor identifying portion provided in the drive box 2 with respect to the outer surface of the disk-shaped rotating body 14 and provided on the rotating body 14. A sensor support 17 having a photosensor for detecting the image is fixedly provided at a predetermined interval.
As shown in FIG. 8, in this embodiment, a control unit 19 including a printed circuit board 18 for a photosensor is provided at a location 20 (for example, a wall surface of a building or a door) outside the drive box. Acquires the detection signal output from the photosensor and controls the drive motor 11.

(3) Specific configuration of main part-rotating plate 14
With reference to FIGS. 5 and 6, the configuration of the rotating plate 14 having the sensor identifying portion will be described. FIG. 5 is an explanatory view schematically showing a main part including the rotating plate 14 of FIG. 2, and FIG. 6 is an explanatory view seen from one side of the rotating plate 14. As shown in FIG. 5, the rotating plate 14 is integrally attached to the right portion of the drive shaft 5.

  Thus, with reference to FIG. 6, the rotating plate 14 is formed in a disc shape, and a shaft hole 21 having a small groove-type engaging portion is formed in the center of the rotating plate 14. On the upper side, one notch 22 formed in an arc shape from one edge 22a in the radial direction to the other edge 22b is formed. The notch 22 may be an arc-shaped light reflection mark. Therefore, here, the light transmission type notch 22 and the light reflection type identification mark are defined as “sensor identification unit 22”.

(4) Specific configuration of main part-sensor support 17
As shown in FIG. 8, the sensor support 17 includes at least a first sensor support 17a for completing the locking of the electric lock, and an unlocking completion for the electric lock spaced apart from the first sensor support by a predetermined distance. Two of the second sensor supports 17b are included.

  In the present embodiment, for example, when the first sensor support 17a is "ON", the second sensor support 17b is "OFF", and the first sensor support 17a and the second sensor support are configured. The purpose is to obtain a locking / unlocking signal stably by combining with 17b.

  FIG. 7 shows a schematic cross-sectional shape of the sensor support 17. A horizontal through hole 25 is formed at the thick base end portion of the sensor support 17 having a U-shaped cross section. The sensor support 17 is directly or indirectly attached to the inner wall surface of the drive box 2 through a fixing tool 27 inserted into the through hole 25 and the female screw portion 26 (see FIG. 5) formed in the lid 2b of the drive box 2. Fixed to.

  Thus, the opposing support rod extending in an opposing state from the thick base end portion is opposed to sandwich the one side surface 14a and the other side surface 14b of the disc-shaped rotating plate 14 with a slight gap. The tip of one opposing support rod is a light projecting portion (light emitting element) 28, whereas the tip of the other counter support rod is a light receiving portion (light receiving element) 29. Therefore, the sensor provided on the sensor support 17 of the present embodiment is a photosensor that can detect the sensor identification unit 22.

(5) Clutch mechanism Y
Since the specific configuration of the clutch mechanism Y is not a limiting requirement of the present invention, members related to the present invention will be briefly described. As described above, the clutch mechanism Y is disposed in the drive box 2 and on the left side of the drive shaft 5. As shown in FIGS. 2 to 5, the clutch mechanism Y is provided with a movable torque limiter plate 15 slidable in the axial direction of the drive shaft 5, which constitutes the clutch means. 14 a supports one end of a torque limiter plate biasing spring 31 interposed between the torque limiter plate 15 and the rotary plate 14.

  2 and 4, reference numeral 32 denotes a fixed-side annular torque limiter plate that is fixedly attached to the drive shaft 5 and frictionally engages with the movable-side annular torque limiter plate 15. Unnumbered corrugated engaging teeth are continuously formed in the circumferential direction on the peripheral portions of the opposing surfaces of the torque limiter plates 15 and 32.

(6) Control of Drive Shaft Drive Mechanism of Electric Lock FIGS. 8 and 9 conceptually show control of the drive shaft drive mechanism X of the electric lock. FIG. 9 shows the control method (action) of the drive shaft drive mechanism of the electric lock.

  The control method will be described with reference to FIG. 9. A is a drive shaft turning step for turning the drive shaft 5 by the driving force of the drive motor 11, and B is a light transmission type provided at the drive shaft 5 and at a predetermined location. A co-rotation process for rotating the rotating plate 14 having the notch or the light reflection type mark 22 together with the drive shaft 5, C is arranged with respect to the outer surface of the rotating body 14, and the co-rotation process B A detection signal acquisition step for acquiring a detection signal via the photosensors 28 and 29 for detecting the light transmission state and the light reflection state of the rotating body 14 rotating in the clockwise direction or the counterclockwise direction, and D is a detection signal acquisition step C. This is a control step for controlling the drive of the drive motor 11 based on the detection signal obtained in the above.

  As is well known, when the thumb turn knob 6 of the electric lock is rotated 90 degrees from the indoor side, a dead bolt (not shown) appears and enters a so-called locked state or unlocked state.

  Therefore, as shown in FIG. 8, the rotating plate 14 is temporarily rotated in a predetermined direction (for example, clockwise), and the “sensor identification portion 22” moves to the first sensor support 17a. Light from the light projecting part (light emitting element) 28 of the first sensor support 17a passes through the sensor identifying part 22, and the light receiving part (light receiving element) 29 catches it, while the second sensor support 17b rotates. When the other part of the board 14 is in the shielding state, the “ON state” signal of the first sensor support 17a input to the detection printed circuit board 18 and the “OFF state” of the second sensor support 17b. The control unit 19 determines that the signal is a signal for locking completion, and sends a control signal (drive stop signal) a to the drive motor 11.

  On the other hand, when the rotating plate 14 rotates, for example, counterclockwise, the sensor identifying portion 22 of the rotating plate 14 moves toward the second sensor support 17b. Thus, the control unit 19 determines that the signal is for unlocking completion, and sends a drive stop signal a to the drive motor 11. Therefore, it is possible to reliably achieve the intended object of the present invention (stable acquisition of a drive stop signal for the drive motor and prevention of burn-in of the drive motor).

  In the examples shown in the embodiment of the present invention, three sensor supports 17 may be provided as necessary, or when the purpose is not to obtain a locking / unlocking signal stably. May be “one”. In the present embodiment, for example, when the first sensor support 17a is "ON", the second sensor support 17b is "OFF", and the first sensor support 17a and the second sensor support are configured. The purpose is to obtain a locking / unlocking signal stably by combining with 17b.

  By the way, although the electric lock of a present Example contains the clutch mechanism Y, the clutch mechanism Y is not an essential matter of invention.

  However, the configuration of the clutch mechanism Y will be described. The clutch mechanism Y of the electric lock of the present embodiment is a “axial clutch of the drive shaft 5”. Specifically, when the axial clutch is engaged, the driving body 15 (torque limiter) that rotates by the driving force of the driving motor 11 continues in the circumferential direction by the spring force of the biasing spring 31. Driving through the driven body because the engaged tooth is engaged with the non-engaged tooth continuously connected in the circumferential direction of the numbered driven body integrally provided on the drive shaft 5. When the shaft 5 rotates clockwise or counterclockwise with respect to the shaft 5 and the axial clutch is disengaged, that is, with respect to the pressing force of the biasing spring 31, the engagement teeth and the engaged teeth On the condition that the set torque value determined by the friction coefficient exceeds, the driving body 15 resists the pressing force of the biasing spring 31 in the direction in which the engaging teeth move away from the engaged teeth of the driven body (in the embodiment, the thumb turn). When the position is displaced in the direction of the knob 6), the clutch is disengaged in the axial direction. , Driving body 15 comprises an idling state with respect to the driven member or rod drive shaft 5.

  The present invention is mainly used in the locksmith and joinery industries.

1 to 9 are explanatory views showing the best embodiments of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 2 is an explanatory schematic cross-sectional view showing the internal structure of the main part of FIG. Schematic explanatory drawing which showed the state which integrated the drive shaft drive mechanism X in the drive box. The schematic explanatory drawing which showed the structural member of the drive shaft drive mechanism X by the perspective view. The schematic explanatory drawing which showed the principal part containing the rotating plate 14 of FIG. Explanatory drawing seen from the one side surface 14a of the rotating plate 14. FIG. Explanatory drawing of the principal part (sensor support body). The schematic explanatory drawing which showed the drive shaft drive mechanism X notionally. The process figure which showed the control method of the drive shaft drive mechanism.

X ... drive shaft drive mechanism, Y ... clutch mechanism, 1 ... door, 1a ... inner wall surface, 2 ... drive box, 2a ... case body, 2b ... lid body, 3 ... mounting seat, 4 ... indoor, 5 ... drive shaft, 5a, 5b ... projecting end, 6 ... thumb turn knob, 7 ... dharma, 8 ... inside door, 11 ... drive motor, 12 ... in lower storage space, 13 ... in upper storage space, 14 ... rotating plate, 14a ... one Side surface, 15 ... torque limiter, 16 ... transmission gear, 17 ... sensor support, 17a ... first sensor support, 17b ... second sensor support, 18 ... printed circuit board for detection, 19 ... control section, 21 ... shaft hole , 22 ... sensor identification part, 25 ... through hole, 26 ... female screw part, 27 ... fixing tool, 28 ... light projecting part (light emitting element), 29 ... light receiving part (light receiving element), 31 ... bias for torque limiter plate Spring, A ... Drive shaft turning process, B ... Co-rotating process, C ... Detection signal No. acquisition process, D ... control process.

Claims (2)

A control device for a drive shaft drive mechanism of an electric lock having a drive box that is faced to the free end of the door and includes a drive motor including a drive motor that constitutes an electric lock and that does not have a dead bolt. Te, a drive shaft rotatably supported in the drive box of the electric lock, fitted with a rotary body having a sensor identification unit, whereas, is disposed against the outer surface of the rotating member, and identification the sensor A sensor support having a photosensor for detecting the position state of the unit is provided in the drive box, and a detection signal output from the photosensor is acquired in the drive box or a location outside the drive box to obtain the drive. The control apparatus of the drive shaft drive mechanism of the electric lock provided with the control part which drives and controls a motor.
2. The control device for a drive shaft drive mechanism of an electric lock according to claim 1, wherein the drive shaft drive mechanism X is faced through a case-like mounting seat 3.

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