JP2017031650A - Slide latch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide latch device such that a display body is never maliciously operated to rotate.SOLUTION: Linear motion by sliding of a latch 12 engaged with and disengaged from a latch receiver 17 is converted into rotational motion of a rotary shaft 21 by a rack pinion mechanism 22. Rotation of the rotary shaft 21 is transmitted from an input gear 54 to an output gear 55 in a cover 32 provided on a room outside face of a door D. A rotatable cam 60 is provided coaxially with the input gear 54, and a Geneva mechanism which converts continuous rotational motion of the input gear 54 into rotational motion of the cam 60 to a set angle is provided between the cam 60 and the input gear 54. When the cam 60 rotates, a display body 42 supported to swing by being pressed by a cam piece provided to the cam 60 is swung to switch and display a section display plane in a display window 53. The Geneva mechanism locks and retains the display body 42 at the switching display position, and the display body 42 is prevented from being maliciously swung away from the display window 53.SELECTED DRAWING: Figure 1

Description

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

  Generally, doors in toilets of commercial facilities and hotels are locked and unlocked by a slide latch device. At this time, simply locking and unlocking the door with the slide latch device cannot identify whether the toilet is in use or not in use from the outside.

  In view of this, in the slide latch device, a display unit is provided on the outside of the door so that the display unit can visually identify whether the display unit is in use or not in use.

  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 length direction to lock and unlock, and linear movement by sliding of the lock bar is performed. The display body attached to the gear shaft of the output gear is converted into rotational motion of the rotary shaft in the display section provided outside the door by the rack and pinion mechanism, and the rotation of the rotary shaft is reduced by a gear type reduction gear. The display unit is rotated to switch and display different display sections of the display body on a display window formed on the cover.

  In addition, when an emergency situation occurs, such as the user falling down in the toilet, a tool for rotation is inserted into the tool engagement hole formed in the center of rotation of the display body from the outside of the door, and the tool rotates. By operating, the lock bar is slid to the unlock position to unlock the door.

  On the other hand, in the slide latch device described in Patent Document 2, a rack is formed of a display switching gear portion and an emergency unlocking gear portion, and a pinion provided on the rotating shaft is used as a display switching gear portion. Can be switched to the emergency unlocking gear section, and the display body is rotated by a set angle by sliding the lock bar in a state where the pinion meshes with the display switching gear section. The display is switched to the display window.

  When an emergency occurs, the emergency unlocking tool is inserted into the center hole of the display body through the emergency operation hole formed in the cover, the rotary shaft is pushed in, and the pinion is engaged with the emergency unlocking gear. In this state, the pinion is rotated by rotating the tool, and the lock bar is slid to the unlocked position.

Japanese Utility Model Publication No. 7-14042 JP 2005-120767 A

  By the way, in the slide latch device described in Patent Document 1 and Patent Document 2, the display body rotates in conjunction with the slide operation of the lock bar. Therefore, when rotational torque is applied to the display body from the display window, the display body is displayed. May rotate and the display body may be rotated by mischief.

  Further, there is a possibility that the lock bar is slid to the locking position by the rotation operation of the display body, the door is locked, and the door cannot be used.

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

  In order to solve the above-described problems, in the present invention, an operation unit for locking and unlocking provided on the indoor side of the door, and a display unit provided on the outdoor side of the door, the pedestal on which the operation unit is attached to the door; A latch that is slidably supported by the pedestal and is detachable with respect to a latch receiver provided on the indoor surface side of the opening frame at the entrance and exit, and protrudes toward the operation unit through the pedestal. A rotation shaft that can rotate, and a rack and pinion mechanism that converts linear motion caused by sliding of the latch into rotation motion of the rotation shaft, and the display unit is attached to a door through the base plate The cover is attached to the door, and is incorporated in the cover so that it can swing around the horizontal axis. By swinging the cover, different section display surfaces provided on the arc-shaped outer peripheral wall are covered. A display body that is switched and displayed on the provided display window, an input gear that is connected to the rotating shaft and is rotatable within the cover, an output gear that meshes with the input gear, and the input gear that is arranged coaxially And a cam that is rotatable about the axis of the input gear, and converts a continuous rotational motion of the output gear into a rotational motion of a set angle of the cam between the output gear and the cam. A mechanism is provided, and the cam is arranged on the outer periphery of the cam with rotational play in an arc space provided on the inner periphery of the end of the display body, and the display body is shaken by pressing of the end faces facing in the circumferential direction of the arc space. A configuration provided with a cam piece to be moved was adopted.

  In the slide latch device configured as described above, when the latch is slid, the linear motion of the latch is converted into the rotational motion of the rotating shaft by the rack and pinion mechanism, and the rotating shaft rotates, and the rotation is transmitted from the input gear to the output gear. Then, the continuous rotational motion of the output gear is converted into intermittent rotational motion of the cam by the Geneva mechanism.

  At this time, since there is a rotational play between the cam piece provided on the cam and the circumferentially facing end surface of the arc space provided on the inner periphery of the end of the display body, the cam is empty within the range of the rotational play. Rotate. When the rotation direction play disappears, the cam piece presses the circumferential end surface of the arc-shaped space, the display body rotates by the pressing, and the different segmented display surfaces provided on the arc-shaped outer peripheral wall portion are provided on the cover. The display is switched to the display window.

  Here, since the division display surface is provided on the arcuate outer peripheral wall portion of the display body, the angle required for switching is small, the division display surface is instantaneously switched, and the division display surface is halfway. Can be prevented from being displayed.

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

  Here, as a Geneva mechanism, a disc-shaped stopper portion is provided on one side surface of the output gear, and a crank pin is provided around the stopper portion. An arc-shaped notch is provided, and the cam has an arc-shaped outer peripheral surface guided by the inner peripheral surface of the notch, and a radial slot into which the crank pin is inserted, and the cam It is possible to employ a configuration in which a pair of recessed arcuate surfaces that allow idling of the stopper portion are provided at both ends in the circumferential direction of the slot.

  In the Geneva mechanism having the above-described configuration, the output gear rotates, and the cam rotates by a set angle as the crank pin rotates while entering the slot. When the cam rotates by a set angle, the arc surface of the cam faces the outer peripheral cylindrical surface of the stopper portion, and the rotation transmission from the output gear to the cam is interrupted. In this interrupted state, the output gear stops, and the cam arc surface and the stopper The cam is held in a stopped state by the engagement of the outer peripheral cylindrical surface of the portion.

  In the use of the Geneva mechanism as described above, a protruding shaft portion is provided on the axial end surface of the stopper portion, a tool engagement hole is provided on the end surface of the protruding shaft portion, and a protruding portion is formed on the arc-shaped outer peripheral wall portion of the display body. It is preferable that an arc-shaped long hole into which the end of the shaft portion is inserted is provided, and a tool insertion hole is provided in the cover at a position facing the protruding shaft portion.

  In this way, 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 rotates, and the rotation is changed from the input gear to the pinion. Since it is transmitted, the latch can be moved backward to the unlocked position, and an emergency can be dealt with.

  In the present invention, as described above, the linear motion caused by the slide of the latch is converted into the rotational motion 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 motion of the output gear is changed. Because the Geneva mechanism converts the cam into intermittent rotational movement, and the cam piece provided on the cam presses the end face in the circumferential direction of the arc space provided in the display body so that the display body is swung. It is possible to switch and display different section display surfaces provided on the display body on a display window provided on the cover.

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

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

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the slide latch device that locks and unlocks 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 outdoor 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 supported so as to be slidable 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 outdoor 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 of the operation unit 10, while a stud 33 is provided in the base plate 31 of the display unit 30 so as to face the insertion hole 13 and is inserted through the insertion hole 13. The bolts 14 are screwed into the screw holes 34 formed in the studs 33, and the base 11 and the base plate 31 are attached to hold the door D from the inside and outside of the room by tightening the bolts 14.

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

  The guide groove 15 in the latch 12 opens at one end of the latch 12, and the opening end engages / disengages with respect to the latch receiver 17 provided on the indoor side surface of the opening frame of the doorway A that is opened and closed by the door D. The engaged state is a locked state, and the detached state is an unlocked state. In the unlocked state, one end surface of the latch 12 is retracted inward from the door end side end surface of the door D.

  A restriction groove 18 extending in the sliding direction of the latch 12 is provided on the inner wall of the guide groove 15. On the other hand, a restriction projection 19 is provided on the surface side of the fitting portion that fits in the latch 12 of the base 11, and a flange 19 a provided at the tip of the restriction projection 19 is fitted in the restriction groove 18. The latch 12 is slidable within a range in which both ends 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 19 a is the locking position of the latch 12, and the stop position where the other end abuts the flange 19 a is the unlocking position of the latch 12.

  A shaft insertion hole 20 penetrating the front and back is formed in the base 11, and a rotation shaft 21 is inserted into the shaft insertion hole 20 and is rotatably supported. Between the rotary shaft 21 and the latch 12, a rack and pinion mechanism 22 that converts a linear motion caused by the slide of the latch 12 into a rotary motion of the rotary shaft 21 is provided.

  The rack and pinion mechanism 22 includes a rack 23 that extends long in the sliding direction of the latch 12 at the opening of the restriction groove 18, and a pinion 24 that is provided at one end of the rotating shaft 21 and meshes with the rack 23.

  The rotating shaft 21 has a connecting shaft portion 21 a having a square cross-sectional shape at the other end, 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 the four corners. On the other hand, the cover 32 is provided with a rectangular peripheral wall 32 a that is fitted to the base plate 31. The cover 32 is provided with a screw hole 36 facing 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 FIGS. 2 and 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 the first gear housing recess. A second gear accommodating recess 41 communicating with 40 is provided.

  As shown in FIG. 2, a display body 42 is incorporated in the cover 32 outside 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 an arc-shaped outer peripheral wall 43, and a fulcrum pin at the center of the arc-shaped outer periphery of the end plate 44. 45, and a non-use division display surface 47 of the arcuate outer peripheral wall 43 and a use division display surface 46 on the upper side thereof.

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

  As shown in FIGS. 2 and 3, the cover 32 is provided with a protrusion 50 along the inner surface of the one end wall. In addition, a partition wall 51 that partitions the inside of the cover 32 to the left and right is provided inside the cover 32, 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 protruding portion 50. The display body 42 is swingable about the fulcrum pin 45. Further, the segment display surfaces 46 and 47 are switched and displayed on the display window 53 provided in the cover 32 by swinging the display body 42.

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

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

  A protruding shaft 59 is provided coaxially with the rotary shaft 21 on the closed end wall of the first gear housing recess 40, and the cam 60 is rotatably supported around the protruding 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, a geneva mechanism 62 that converts a continuous rotational motion of the output gear 55 into a rotational motion (oscillating motion) of a set angle of the cam 60 is provided between the output gear 55 and the cam 60. Is provided.

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

  As shown in FIGS. 2 and 4, a cam piece 69 is provided on the outer periphery of the cam 60. The cam piece 69 is disposed with play in the rotational direction in the arcuate space 48 provided on the inner periphery of the end of the display body 42. . The cam piece 69 is configured to press the end face facing in the circumferential direction of the arc space 48 when the cam 60 swings around the protruding shaft 59 to swing the display body 42.

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

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

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

  When the latch 12 is slid from the state shown in FIG. 1 toward the locking position where the latch 12 is engaged with the latch receiver 17, the linear motion caused by the sliding of the latch 12 is converted into the rotational motion of the rotating 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.

  The rotation of the output gear 55 causes a crank pin 64 provided on the output gear 55 to rotate around the output gear 55 while entering a slot 67 formed in the cam 60. The cam 60 rotates by a set angle and stops.

  FIG. 6 (II) shows a state in the middle of rotation of the cam 60, and FIG. 6 (III) shows a state in which the cam 60 is rotated by a set angle and stopped. At the initial stage of rotation when the cam 60 rotates by a set angle, there is a rotational play between the cam piece 69 provided on the cam 60 and the circumferentially opposed end face of the arc space 48 provided on the inner periphery of the end of the display body 42. The cam 60 rotates idly within the range of the rotation direction play. When the rotation direction play is eliminated, the cam piece 69 presses the circumferential end surface of the arc-shaped space 48, and the display body 42 swings around 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 division display surface 46 provided on the arcuate outer peripheral wall 43 is instantaneously switched and displayed on the display window 53 provided on the cover 32.

  When the latch 12 slides to the position indicated by the chain line in FIG. 1, the leading end 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 a state of being engaged with the latch receiver 17, and the door D is locked.

  In the locked state of the door D, when an emergency situation occurs in which the user falls, a rotation operation tool is inserted into the tool insertion hole 72 shown in FIG. 5, and the rotation operation tool is provided on the output gear 55. It engages with the tool engagement hole 71 of the part 70 and rotates. By the rotation operation, the output gear 55 rotates, 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 unlocked position and engages with the latch receiver 17. Is released, the door D is unlocked, and can respond to an emergency.

  Further, when the latch 12 is slid to the unlocked position by the user's operation in the locked state where the latch 12 is engaged with the latch receiver 17, the rotation shaft 21 is double-actuated 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) double-acts 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 end face facing in the circumferential direction of the arc-shaped space 48 during the double-action rotation, the display body 42 swings, and the unused section display surface 47 is switched and displayed on the display window 53 of the cover 32. The

  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 to.

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

D Door A Entrance 10 Operation part 11 Pedestal 12 Latch 17 Latch receiver 21 Rotating shaft 22 Rack and pinion mechanism 30 Display part 31 Base plate 32 Cover 42 Display body 43 Outer peripheral wall part 46 Use division display surface 47 Unused division display surface 48 Arc space 49 Long hole 53 Display window 54 Input gear 55 Output gear 60 Cam 61 Projection shaft 62 Geneva mechanism 63 Stopper 63a Peripheral cylindrical surface 64 Crank pin 65 Notch 66 Arc-shaped outer peripheral surface 67 Slot 68 Arc surface 69 Cam piece 70 Projection shaft 71 Tool engagement hole 72 Tool insertion hole

Claims (3)

It consists of an operation part for locking and unlocking provided on the indoor side of the door, and a display part provided on the outdoor side of the door,
A base on which the operation unit is attached to the door; a latch that is slidably supported by the base; and a latch that can be engaged with and disengaged from a latch receiver provided on the indoor surface side of the opening frame at the doorway; A rotatable rotating shaft projecting toward the operation section, and a rack and pinion mechanism for converting linear motion by sliding of the latch into rotational motion of the rotating shaft,
The display unit is a base plate attached to the door, a cover attached to the door via the base plate, and incorporated in the cover so as to be swingable about a horizontal axis. A display body for switching and displaying different section display surfaces provided on the arcuate outer peripheral wall portion on a display window provided on the cover, an input gear connected to the rotary shaft and rotatable in the cover, and the input gear An output gear that meshes with the input gear, and a cam that is arranged coaxially with the input gear and that is rotatable about the axis of the input gear. An output is provided between the output gear and the cam. A Geneva mechanism for converting the continuous rotational movement of the gear into a rotational movement of a set angle of the cam is provided, and the outer periphery of the cam is disposed with a play in the rotational direction in an arc space provided on the inner periphery of the end of the display body, Circumferential direction of the arc 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 disc-shaped stopper portion on one side of the output gear, and a crank pin protruding from the periphery of the stopper portion. A notch is provided, and the cam has an arcuate outer circumferential surface guided by an inner circumferential surface of the notch, and a radial slot into which the crank pin is inserted, and the slot 2. The slide latch device according to claim 1, comprising a pair of recessed arcuate surfaces that allow idling of the stopper portion at both ends in the circumferential direction.   A protruding shaft is provided on the end surface of the stopper in the axial direction, 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 an arc-shaped elongated hole is provided, and a tool insertion hole is provided in the cover at a position facing the protruding shaft portion.

Images