JP6501667B2 - Slide latch device - Google Patents

Description

  The present invention relates to a slide latch device that locks and unlocks a door of a private room such as a toilet.

  In a door in a toilet such as a commercial facility or a hotel, locking and unlocking is generally performed by a slide latch device. At this time, simply by locking and unlocking the door by the slide latch device, it can not be identified from the outside whether the toilet is in use or not in use.

  Therefore, in the slide latch device, a display unit is provided on the outdoor side of the door so that the display unit can visually identify whether it is in use or not in use from outside the room.

  As a slide latch device having a display unit, those described in Patent Document 1 and Patent Document 2 are conventionally known. In the slide latch device described in Patent Document 1, the lock bar corresponding to the latch provided on the indoor side of the door is slid in the longitudinal direction to lock and unlock the lock bar, and the linear movement of the lock bar by sliding is performed. The rack and pinion mechanism converts the rotational movement of the rotation shaft in the display unit provided outside the door by the rack and pinion mechanism, reduces the rotation of the rotation shaft by the gear type reduction gear, and displays the display body attached to the gear shaft of the output gear It is made to rotate, and it is made to switch and display the different division display surface of the display body to the display window formed in the cover.

  In addition, when an emergency occurs, such as when the user falls inside the toilet, insert the rotation tool from the outside of the door into the tool engagement hole formed in the rotation center of the display body, and rotate the tool. The lock bar is slid to the unlocking position by operation to unlock the door.

  On the other hand, in the slide latch device described in Patent Document 2, the rack is formed of the display switching gear portion and the emergency unlocking gear portion, and the pinion provided on the rotation shaft is the display switching gear portion. And the emergency unlocking gear portion, and the display body is rotated by a set angle by the slide of the lock bar in a state in which the pinion is engaged with the display switching gear portion, and different classification display surfaces are formed on the cover The display window is switched and displayed.

  When an emergency occurs, the emergency unlocking tool is inserted from the emergency operation hole formed in the cover into the center hole of the display body and the rotation shaft is pushed in, and the pinion is engaged with the emergency unlocking gear portion In this state, the pinion is rotated by turning the tool to slide the lock bar to the unlocking position.

Japanese Utility Model Publication 7-14042 JP 2005-120767 A

  By the way, in the slide latch device described in Patent Document 1 and Patent Document 2, since the display body is rotationally moved in conjunction with the slide operation of the lock bar, the display body when applying the rotational torque to the display body from the display window May rotate and the display body may be rotated due to mischief.

  Further, there is a possibility that the lock bar may slide to the locking position by the rotation operation of the display body to lock the door, resulting in an unusable state.

  An object of the present invention is to provide a slide latch device in which a display body is not rotated by a play.

  In order to solve the above-described problems, in the present invention, a lock / unlock operation unit provided on the indoor side of the door and a display unit provided on the outdoor side of the door, the base being attached to the door A latch slidably supported by the pedestal and capable of engaging and disengaging with a latch receiver provided on the indoor surface side of the opening frame at the entrance and exit through the pedestal and projecting toward the operation portion And a rack and pinion mechanism for converting linear movement of the latch due to sliding into rotational movement of the rotation shaft, the display unit including a base plate attached to the door, and the base plate A cover attached to the door, and a cover which is incorporated in the cover and is pivotable about a horizontal axis and which covers different divided display surfaces provided on the arc-shaped outer peripheral wall A display body for switching to a display window provided, an input gear connected to the rotary shaft and rotatable in the cover, an output gear meshing with the input gear, and coaxially arranged with the input gear And a cam rotatable about the axis of the input gear, and converting between continuous rotational movement of the output gear to rotational movement of the set angle of the cam between the output gear and the cam. A mechanism is provided, and is disposed on the outer periphery of the cam in an arc-shaped space provided on the inner periphery of the end portion of the display body with rotational direction play, and the display body is shaken by pressing the end face facing in the circumferential direction of the arc The structure which provided the cam piece to move was employ | adopted.

  In the slide latch device having the above configuration, when the latch is slid, the linear motion of the latch is converted to the rotational motion of the rotation shaft by the rack and pinion mechanism to rotate the rotation shaft, and the rotation is transmitted to the output gear from the input gear The continuous rotational movement of the output gear is converted by the Geneva mechanism into an intermittent rotational movement of the cam.

  At this time, since there is a rotational direction play between the cam piece provided on the cam and the circumferentially opposed end face of the arc-shaped space provided on the inner periphery of the end of the display body, the cam is empty within the rotational direction play. Rotate. When the rotational direction play disappears, the cam piece presses the circumferential end face of the arc-shaped space, and the display body is rotated by the pressure, and the different divided display surface provided on the arc-shaped outer peripheral wall portion is provided on the cover The display is switched to the display window.

  Here, since the classification display surface is provided on the arc-shaped outer peripheral wall of the display body, the angle required for switching is small, and the classification display surface is instantly switched, and the classification display surface is half-finished Can be displayed on the screen.

  In the switching state of the divided display surface, the cam is held in a locked state by the Geneva mechanism. Therefore, even if rotational torque is applied to the display through the display window, the rotational torque is received by the Geneva mechanism, and the display does not rotate. As a result, the display body is not rotated by mischief.

  Here, as a Geneva mechanism, a disk-like stopper portion and a crank pin are provided on one side of the output gear so as to protrude around the stopper portion, and an outer peripheral cylindrical surface of the stopper portion is circular at a position facing the crank pin. An arc-shaped notch is provided, and the cam has an arc-shaped outer circumferential surface guided to the inner circumferential surface of the notch, and the radial slot in which the crank pin is inserted in the arc-shaped outer circumferential surface It is possible to employ a configuration in which a pair of recessed circular arc surfaces that allow idle rotation of the stopper portion are provided at both end portions in the circumferential direction of the slot.

  In the Geneva mechanism configured as described above, the output gear rotates, and the crank pin rotates while entering the slot, whereby the cam rotates by the set angle. When the cam rotates by the set angle, the arc surface of the cam faces the outer peripheral cylindrical surface of the stopper, the rotation transmission from the output gear to the cam is cut off, and the output gear stops in the shut off state, and the arc surface of the cam and the stopper The cam is held stationary by the engagement of the outer peripheral cylindrical surface of the part.

  In the adoption of the above-described Geneva mechanism, a protruding shaft is provided on the end face in the axial direction of the stopper, a tool engagement hole is provided on the end of the protruding shaft, and the outer circumferential wall of the display body is protruded It is preferable to provide an arc-shaped long hole into which the end of the shaft is inserted, and to provide a tool insertion hole in the cover at a position facing the projecting shaft.

  In this case, when the rotation operation tool is inserted into the tool insertion hole and the rotation operation tool is engaged with the tool engagement hole and rotated, the output gear is rotated, and the rotation is from the input gear to the pinion. As it is transmitted, the latch can be retracted to the unlocking position, and an emergency can be handled.

  In the present invention, as described above, the linear movement of the latch due to the slide is converted to the rotational movement of the rotating shaft by the rack and pinion mechanism, the rotation is transmitted from the input gear to the output gear, and the continuous rotational movement of the output gear is Since the Geneva mechanism converts the cam into an intermittent rotational movement of the cam, the cam piece provided on the cam presses the circumferential end face of the arc-shaped space provided on the display body to swing the display body. Different division display surfaces provided on the display can be switched and displayed on display windows provided on the cover.

  In addition, since the rotation of the output gear is transmitted to the cam via the Geneva mechanism, and the display body is swung by the rotation of the cam, the cam is held in the locked state by the Geneva mechanism when the divided display surface is switched. can do. For this reason, even if rotational torque is applied to the display through the display window, the rotational torque is received by the Geneva mechanism so that the display does not rotate but the display is surely rotated by mischief. It can be prevented.

A longitudinal sectional view showing an embodiment of a slide latch device according to the present invention An enlarged sectional view of the display unit of FIG. 1 Sectional view along line III-III in FIG. 2 Sectional view along line IV-IV in FIG. 2 Sectional view along the line V-V in FIG. 2 (I) to (III) are sectional views showing the operation of the Geneva mechanism that transmits rotation from the output gear to the cam in stages Sectional drawing which shows the switching state of the division display surface provided in the display body An exploded perspective view of various parts forming the display unit An exploded perspective view of the various parts shown in FIG. 8 viewed from different directions

  Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in FIG. 1, the slide latch device for locking and unlocking the door A includes an operation unit 10 provided on the indoor surface of the door D and a display unit 30 provided on the outer surface of the door D.

  The operation unit 10 includes a rectangular pedestal 11 attached to the indoor surface of the door D, and a latch 12 slidably supported in the left-right direction along the pedestal 11. On the other hand, the display unit 30 has a base plate 31 attached to the chamber outer surface of the door D, and a cover 32 attached to the door D via the base plate 31.

  A plurality of insertion holes 13 are formed in the pedestal 11 in the operation unit 10, while studs 33 are provided in the base plate 31 in the display unit 30 to face the insertion holes 13, and are inserted into the insertion holes 13. A bolt 14 is screwed into a screw hole 34 formed in the stud 33, and by tightening the bolt 14, the pedestal 11 and the base plate 31 hold the door D from outside the room.

  The latch 12 is U-shaped in cross section, and a guide groove 15 is provided on the surface facing the door D, and a guide ridge 16 extending in the longitudinal direction of the latch 12 is provided at the upper and lower portions of the guide groove 15. ing. The guide ridges 16 are slidably fitted in guide grooves (not shown) formed on the upper side and the lower side of the pedestal 11, and the latch 12 is slidably supported in the left-right direction.

  Further, the guide groove 15 in the latch 12 is opened at one end of the latch 12, and the open end engages with the latch receiver 17 provided on the indoor side surface of the opening frame of the entrance A which is opened and closed by the door D. The engagement state is the locked state, and the disengaged state is the unlocked state. In the unlocked state, one end face of the latch 12 is retracted inward from the end face side end face of the door D.

  A restricting groove 18 extending in the sliding direction of the latch 12 is provided on the inner side wall of the guide groove 15. On the other hand, the control protrusion 19 is provided on the surface side of the fitting portion to be fitted in the latch 12 of the pedestal 11, and the flange 19a provided at the tip of the control protrusion 19 fits in the control groove 18 The latch 12 is slidable within a range in which both end portions of the restriction groove 18 abut on the flange 19a.

  Here, the stop position where one end of the restriction groove 18 abuts on the flange 19a is the locking position of the latch 12, and the stop position where the other end abuts on the flange 19a is the unlocking position of the latch 12.

  The base 11 is formed with a shaft insertion hole 20 penetrating through the front and back, and the rotary shaft 21 is inserted into the shaft insertion hole 20 and rotatably supported. A rack and pinion mechanism 22 is provided between the rotary shaft 21 and the latch 12 for converting the linear movement of the latch 12 due to the slide into the rotary motion of the rotary shaft 21.

  The rack and pinion mechanism 22 includes a rack 23 extending in the sliding direction of the latch 12 at the opening of the restriction groove 18 and a pinion 24 provided at one end of the rotating shaft 21 and meshing with the rack 23.

  The rotary shaft 21 has, at the other end, a connecting shaft portion 21 a having a rectangular cross-sectional shape, and the connecting shaft portion 21 a protrudes toward the display unit 30.

  As shown in FIGS. 2, 3 and 9, the base plate 31 has a rectangular shape, and screw insertion holes 35 are provided at four corners. On the other hand, the cover 32 is provided with a rectangular peripheral wall 32 a fitted to the base plate 31. Further, a screw hole 36 is provided in the cover 32 so as to face the screw insertion hole 35, and the base plate 31 and the cover 32 are coupled by tightening a screw 37 screwed into the screw hole 36 from the screw insertion hole 35.

  A bracket 38 is attached to the base plate 31 on one side facing the inside of the cover 32. As shown in FIG. 2 and FIG. 9, the bracket 38 has a seat plate 39 attached to the outdoor side surface of the base plate 31, and the seat plate 39 has a first gear housing recess 40 and its first gear housing recess. A second gear housing recess 41 communicating with 40 is provided.

  As shown in FIG. 2, a display 42 is incorporated inside the cover 32 on the outdoor side of the bracket 38. As shown in FIGS. 8 and 9, the display body 42 is provided with a pair of arc-shaped end plates 44 at both ends of the arc-shaped outer peripheral wall 43, and a fulcrum pin is provided at the center of the arc-shaped outer periphery of the end plate 44. The non-use classification display surface 47 of the arc-shaped outer peripheral wall 43 and the use classification display surface 46 are provided on the upper side thereof.

  Further, as shown in FIG. 4, an arc-shaped space 48 is provided on the inner surface side of one end plate 44 of the pair of opposed end plates 44. Further, as shown in FIG. 9, an arc-shaped elongated hole 49 is provided in the arc-shaped outer peripheral wall portion 43.

  As shown in FIGS. 2 and 3, the cover 32 is provided with a protrusion 50 along the inner surface of one end wall. Further, a partition wall 51 is provided inside the cover 32 to divide the inside of the cover 32 into right and left, and the fulcrum pin 45 of the display body 42 is supported by the pin holes 52 formed in the partition wall 51 and the projection 50 respectively. The display body 42 is swingable around the fulcrum pin 45. Further, the divided display surfaces 46 and 47 are switched and displayed on the display window 53 provided on the cover 32 by the swinging of the display body 42.

  As shown in FIGS. 2 to 4, the input gear 54 is incorporated in the first gear housing recess 40 provided in the bracket 38, and the output gear 55 meshing with the input gear 54 is in the second gear housing recess 41. It is built in.

  The input gear 54 is integrally provided at an end of the joint shaft 56. The joint shaft 56 is inserted into a shaft insertion hole 57 formed in the base plate 31 and rotatably supported, and the connecting shaft portion 21a of the rotary shaft 21 is inserted into a rectangular hole 58 opened at the axial end surface thereof. The rotation of 21 rotates the input gear 54 integrally.

  A projecting shaft 59 is provided coaxially with the rotating shaft 21 on the closed end wall of the first gear accommodation recess 40, and the cam 60 is rotatably supported around the projecting shaft 59.

  As shown in FIGS. 2 and 5, the output gear 55 is rotatably supported around a projecting shaft 61 provided on the base plate 31, and can be inserted into and removed from the projecting shaft 61. As shown in FIGS. 2 and 6, between the output gear 55 and the cam 60, a Geneva mechanism 62 which converts continuous rotational movement of the output gear 55 into rotational movement (rocking movement) of the set angle of the cam 60. Is provided.

  As shown in FIG. 2, the Geneva mechanism 62 has a disk-like stopper portion 63 on one side of the output gear 55 and a crank pin 64 protruding around the stopper portion 63. The surface 63a is provided with an arc-shaped notch 65 at a position facing the crank pin 64, while the cam 60 is formed with an arc-shaped outer circumferential surface 66 guided to the inner circumferential surface of the notch 65. A radial slot 67 into which the crank pin 64 is inserted is provided on the arc-shaped outer peripheral surface 66, and a pair of concave circular arc surfaces 68 that allow idle rotation of the stopper portion 63 are provided at both circumferential ends of the slot 67 It has composition.

  As shown in FIGS. 2 and 4, on the outer periphery of the cam 60, there is provided a cam piece 69 which is disposed in the above-mentioned arc-shaped space 48 provided on the inner periphery of the end of the display body 42 with rotational play. . When the cam 60 pivots around the projecting shaft 59, the cam piece 69 presses the end face opposed in the circumferential direction of the arc-shaped space 48 to pivot the display body 42.

  As shown in FIG. 2 and FIG. 5, a projecting shaft portion 70 is provided in a projecting manner on the end face in the axial direction of the stopper portion 63, and a tool engagement hole 71 is provided on the end surface of the projecting shaft portion 70. The end of the projecting shaft 70 is inserted into the aforementioned long hole 49 formed in the arc-shaped outer peripheral wall 43 of the display body 42, and the cover 32 is provided with a tool at a position facing the projecting shaft 70. An insertion hole 72 is provided.

  As shown in FIGS. 2 and 3, an arc-shaped groove 73 centered on the rotation axis is formed in the surface facing the base plate 31 in the output gear 55, and the arc-shaped groove 73 is formed in the base plate 31. A stopper pin 74 slidably inserted is provided. The stopper pin 74 is brought into a positional relationship in which one end of the arcuate groove 73 abuts with the latch 12 shown in FIG. 1 positioned at the unlocking position, and the output gear 55 rotates in the locking direction shown by the arrow in FIG. And prevent rotation in the unlocking direction opposite to the arrow.

  The slide latch device shown in the embodiment has the above-described structure, and FIG. 1 shows the state where the latch 12 is in the unlocked position, and the door D can be freely opened and closed. Further, in the display window 53 formed in the cover 32, a non-use classification display surface 47 provided on the outer peripheral wall 43 of the display body 42 is displayed.

  When the latch 12 is slid from the state shown in FIG. 1 toward the locking position engaged with the latch receiver 17, the linear movement of the latch 12 due to the slide is converted to the rotational movement of the rotary shaft 21 by the rack and pinion mechanism 22. The rotation of the shaft 21 is transmitted from the input gear 54 to the output gear 55, and the output gear 55 continuously rotates in the direction indicated by the arrow in FIG.

  Due to the rotation of the output gear 55, the crankpin 64 provided on the output gear 55 enters the slot 67 formed on the cam 60 while rotating about the output gear 55, and when it rotates by a predetermined angle, it slips out of the slot 67, The cam 60 rotates by a set angle and stops.

  FIG. 6 (II) shows a state in the middle of the rotation of the cam 60, and FIG. 6 (III) shows a state in which the cam 60 rotates at a set angle and stops. In the initial stage of rotation where the cam 60 rotates by a set angle, there is a rotational direction play between the cam piece 69 provided on the cam 60 and the circumferentially opposed end face of the arc-shaped space 48 provided on the inner periphery of the end of the display body 42. The cam 60 idles within the range of the rotational direction play. When the rotational direction play disappears, the cam piece 69 presses the circumferential end face of the arc-shaped space 48, and the display body 42 swings about the fulcrum pin 45 by the pressing. FIG. 7 shows a state in which the display body 42 is swung by a predetermined angle, and the use classification display surface 46 provided on the arc-shaped outer peripheral wall 43 is instantly switched and displayed on the display window 53 provided on the cover 32.

  When the latch 12 slides to the position shown by the chain line in FIG. 1, the tip of the latch 12 in the sliding direction engages with the latch receiver 17, and the rear end of the regulating groove 18 in the sliding direction is the flange 19 a of the regulating projection 19. The latch 12 is held in engagement with the latch receiver 17 and the door D is locked.

  In the locked state of the door D, in the event of an emergency that the user falls over, the rotary operation tool is inserted into the tool insertion hole 72 shown in FIG. 5, and the rotary operation tool is provided on the output gear 55 It engages with the tool engagement hole 71 of the portion 70 and rotates. By the rotation operation, the output gear 55 is rotated, and the rotation is transmitted from the input gear 54 to the pinion 24 shown in FIG. 1, so that the latch 12 slides toward the unlocking position and engages with the latch receiver 17 However, the door D is unlocked and can respond to an emergency.

  In the locked state where the latch 12 engages with the latch receiver 17, when the latch 12 is slid to the unlocking position by the operation of the user, the rotary shaft 21 is double-turned by the operation of the rack and pinion mechanism 22, The rotation is transmitted from the input gear 54 to the output gear 55, and the crank pin 64 shown in FIG. 6 (III) doubles to the position shown in FIG. 6 (I).

  The cam 60 is also returned to the position shown in FIG. Since the cam piece 69 presses the opposing end face in the circumferential direction of the arc-shaped space 48 at the time of double-acting rotation, the display body 42 swings and the non-use classification display surface 47 is switched and displayed on the display window 53 of the cover 32. Ru.

  At this time, the arc surface 68 provided on the cam 60 is engaged with the outer peripheral cylindrical surface 63a of the stopper portion 63 as shown in FIG. Locked on

  For this reason, even if rotational torque is loaded on the display body 42 through the display window 53, the rotational torque is received by the engagement portion of the arc surface 68 and the outer peripheral cylindrical surface 63a, and the display body 42 does not rotate. As a result, the display body 42 is not swung due to mischief.

D door A doorway 10 operation unit 11 pedestal 12 latch 17 latch receiver 21 rotary shaft 22 rack and pinion mechanism 30 display unit 31 base plate 32 cover 42 display body 43 outer peripheral wall 46 use classification display surface 47 non use classification display surface 48 arc shaped space 49 long hole 53 display window 54 input gear 55 output gear 60 cam 61 projecting shaft 62 Geneva mechanism 63 stopper portion 63a outer peripheral cylindrical surface 64 crank pin 65 cutout 66 arc-shaped outer peripheral surface 67 slot 68 arc surface 69 cam piece 70 projecting shaft portion 71 Tool engagement hole 72 Tool insertion hole

Claims (3)

It consists of a lock / unlock operation unit provided on the indoor side of the door and a display unit provided on the outdoor side of the door
The operation unit is mounted on a door, a pedestal slidably supported by the pedestal, and a latch that can be engaged and disengaged with a latch receiver provided on the indoor surface side of the opening frame at the entrance and exit through the pedestal A rotatable rotation shaft protruding toward the operation unit; and a rack and pinion mechanism that converts linear movement of the latch due to sliding into rotational movement of the rotation shaft.
The display unit is incorporated in a base plate attached to the door, a cover attached to the door through the base plate, and is incorporated in the cover so as to be pivotable about a horizontal axis, the pivoting A display body for switching and displaying different divided display surfaces provided on the arc-shaped outer peripheral wall portion to display windows provided on the cover, an input gear connected to the rotary shaft and rotatable in the cover, and its input gear An output gear meshing with the input gear, and a cam coaxially arranged with the input gear and rotatable about an axis of the input gear, and an output between the output gear and the cam A Geneva mechanism is provided for converting continuous rotational movement of the gear into rotational movement at a set angle of the cam, and is arranged on the outer periphery of the cam with rotational play in an arc-shaped space provided on the inner periphery of the end of the display body The circumferential direction of the arc-shaped space Slide latch device in which a cam piece for swinging the display body by the pressing of the opposed end faces.   The Geneva mechanism has a disk-like stopper portion on one side of the output gear and a crank pin projecting around the stopper portion, and an outer peripheral cylindrical surface of the stopper portion has an arc shape at a position facing the crank pin. A notch is provided, and the cam has an arc-shaped outer circumferential surface guided to the inner circumferential surface of the notch, and a radial slot in which the crank pin is inserted in the circular arc-shaped outer circumferential surface, and the slot 2. The slide latch device according to claim 1, wherein a pair of recessed circular arc surfaces which allow idle rotation of the stopper portion are provided at both end portions in the circumferential direction.   A protruding shaft is provided on the end face in the axial direction of the stopper, a tool engagement hole is provided on the end surface of the protruding shaft, and the end of the protruding shaft is inserted into the arc-shaped outer peripheral wall of the display body. The slide latch device according to claim 2, wherein a long circular arc-shaped hole is provided, and a tool insertion hole is provided in the cover at a position facing the projecting shaft portion.

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