JP4748715B2 - Locking devices such as sliding doors - Google Patents

Description

  The present invention relates to a lock device attached to an opening / closing body such as a sliding door or a folding door.

  As a conventional locking device, a sliding door lock shown in FIG. 7 is known. The locking device 400 has a guide long groove portion that guides the sickle member 402 slidably forward and backward (left and right in the drawing) on opposite inner side surfaces of both side plate portions of the case body 401 embedded in the end portion of the sliding door 200. 403. The guide long groove portion 403 extends in the front-rear direction (left-right direction in the drawing) of the case body 401, and the front side (left side in the drawing) is a curved portion 403a that curves upward, and is longer than the curved portion 403a. The rear side (right side in the figure) is a linear portion 403b extending horizontally. The sickle member 402 includes a linear barrel portion 402a guided by the guide long groove portion 403, and a sickle portion 402b that is curved and extended upward at a substantially right angle from the front end of the barrel portion 402a. A guide pin 404 is inserted into the center of gravity of the sickle member 402, and a connecting pin 405 is inserted into and fixed to the rear end of the sickle member 402, and the ends of both pins 404 and 405 can slide into the long slots 403 for both guides. Is housed in. An operation shaft 406 for performing an unlocking operation is supported on the case body 401, and a connecting pin 405 is accommodated in a bifurcated portion 407 a formed at the tip of a hub 407 that rotates together with the operation shaft 406. In this way, they are slidably connected to each other.

When the operation shaft 406 is rotated in the locking direction in the locking device 400, the hub 407 is rotated together with the operation shaft 406, and the sickle member 402 connected to the hub 407 is pushed forward (left side in the figure), and the sickle member 402. The guide pin 404 is guided upward along the guide surface (lower surface) of the curved portion 403 a of the guide long groove 403. As a result, the sickle member 402b of the sickle member 402 is pushed up while protruding from the hole 408 on the front surface of the case body 401, and locked by being engaged with the latch member 320 provided on the door frame 300 (Patent Document). 1).
JP 2000-170421 A

  However, in the conventional locking device described above, when the sickle member 402 is pushed down by inserting a thin instrument such as a flathead screwdriver between the sliding door 200 and the door frame 300, the locking state of the sickle portion 402b with respect to the latching member 320 is maintained. It can be canceled. That is, even if locked, if the sickle member 402 is directly pressed down by some method, the guide pin 404 of the sickle member 402 is guided in the unlocking direction along the guide surface of the curved portion 403a of the guide long groove portion 403. In addition, since the sickle portion 402b is detached from the hooking member 320, there is a possibility that it is easily unlocked.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a locking device that is difficult to perform unauthorized unlocking.

In order to achieve the above object, a locking device of the present invention includes a case body attached to an opening / closing body, a slider that slides inside the case body by an operation from outside the case body, and a locking mechanism for the slider connected to the slider. It is a locking device comprising a sickle member that protrudes from the case body by movement to the side and engages with the fixed frame,
In the case body,
A slider guide portion that linearly guides the slider in the direction of the sickle member and a sickle member guide portion that guides the sickle member in a direction in which the sickle member moves in and out of the case body and a direction in which the sickle member is engaged with and disengaged from the fixed frame are formed. And
When a force is applied directly from the outside of the case body in a direction to move the sickle member in a state of being locked with the fixed frame to the unlocking side along the sickle member guide portion, the force is applied to the slider. On the other hand, it is configured such that it is not transmitted in a direction to move it to the unlocking side along the slider guide portion.

  According to the above configuration, by inserting a tool such as a flat-blade screwdriver between the opening / closing body and the fixed frame, the force is directly applied to the sickle member, and the sickle member is moved to the unlocking side along the sickle member guide portion. Even if it tries to move, the force is not transmitted to the slider in the direction to move it to the unlocking side along the slider guide part, so that the locked state of the sickle member with respect to the fixed frame cannot be released. .

  The locking device of the present invention preferably includes an elastic member that slides on the slider and elastically holds it in the locked position or unlocked position.

  According to the said structure, a locking device can be hold | maintained in a locked state or an unlocked state. Space-saving compared to the case where a holding mechanism is provided around the cam, etc. by using an elastic member that slides into contact with the slider and holds it in the locked or unlocked position to maintain the state. Is possible.

  According to the locking device of the present invention, unauthorized unlocking can be prevented.

Hereinafter, the best mode for carrying out the present invention will be described.
[First Embodiment]
FIG. 1 is an exploded perspective view showing a main part of a sliding door device provided with the locking device according to the first embodiment of the locking device of the present invention. FIG. 2 is an exploded perspective view of the lock device of the first embodiment. FIG. 3 is a cross-sectional view showing a state where the locking device of the first embodiment is unlocked. FIG. 4 is a cross-sectional view showing a state in which the locking device of the first embodiment is locked.

  As shown in FIG. 1, the locking device 100 includes a mounting hole 202 that opens on a closing side end surface of a sliding door (opening / closing body) 200, that is, an end surface 201 that contacts the door frame (fixed frame) 300 when the sliding door 200 is closed. The case body 101 is inserted and attached to the end portion of the sliding door 200. A flange-like vertically long end plate portion 102 is formed at the front end portion of the case body 101, and this end plate portion 102 is a recess formed around the opening portion of the mounting hole 202 of the end surface 201 of the sliding door 200. 203 is fitted. A vertically long slit 103 through which the sickle portion 141 of the sickle member 140 enters and exits is formed at the center of the end plate portion 102.

  A hole 301 for receiving the sickle portion 141 is formed in the door frame 300 at a position facing the mounting hole 202 on the sliding door 200 side, and a receiving washer 310 is fixed at a position facing the end plate portion 102. The hole 301 is closed with a washer 310. A vertically long slit 311 for receiving the sickle portion 141 is formed in the central portion of the washer 310, and the distal end portion of the sickle portion 141 protruding from the end plate portion 102 of the case body 101 is formed at the center of the washer 310. The slit 311 is locked while being caught on the upper edge portion.

  A thumb turn mounting hole 204 for mounting a thumb turn (a rotary knob for locking and unlocking operations) 250 is formed in the indoor side wall plate of the sliding door 200. A round dish-like lid body 260 that rotatably accommodates the thumb turn 250 is fitted into the thumb turn mounting hole 204. An operation shaft insertion hole 261 is formed at the center of the lid 260. The operation shaft insertion hole 261 is inserted with a plate-shaped operation shaft 265 that transmits the rotational force applied to the thumb turn 250 to the lock device 100.

  As shown in FIG. 2, the locking device 100 includes a case body 101 attached to the sliding door 200, a slider 120 that slides inside the case body 101 by an operation from the outside of the case body 101, and a slider 120 connected to the slider 120. The sickle member 140 that protrudes from the case body 101 and engages with the door frame 300 by the movement of 120 to the locking side (direction of arrow A), and slides the slider 120 to the locking side and unlocking side (direction of arrow B). And a resilient member 160 that slides on the slider 120 and elastically holds it in the locked position (see FIG. 4) or unlocked position (see FIG. 3).

  The case body 101 is composed of a pair of left and right zinc die cast case members 101A and 101B formed in a substantially symmetrical structure. The end plate portion 102 is integrally formed with one case member 101A. The case body 101 is assembled by fitting both the members 101A and 101B together by fitting the mutual fitting portions.

  More specifically, the end plate portion 102 of one case member (hereinafter referred to as a first case member) 101A is formed with a fitting slit 104 in parallel with the slit 103 where the sickle portion 141 enters and exits. A claw portion 105 that fits into the fitting slit 104 is formed at the tip of the other case member (hereinafter referred to as a second case member) 101B. In addition, columnar protrusions 106 are formed at two upper and lower portions at the back end of the first case member 101A so as to protrude toward the second case member 101B, and at the back end of the second case member 101B. Is formed with a pair of fitting holes 107 which are fitted together with the two protrusions 106 of the first case member 101A. The case body 101 inserts and engages the claw portion 105 of the second case member 101B into the fitting slit 104 of the first case member 101A while fitting the upper and lower protrusions 106 of the first case member 101A and the second case. By fitting the upper and lower fitting holes 107 of the member 101B to each other, both the members 101A and 101B are joined and assembled.

  Inside the case body 101, a pair of left and right slider guide grooves (slider guide portions) 111A and 111B for linearly guiding the slider 120 in the direction in which the sickle member 140 extends and retracts (directions of arrows A and B), and a sickle member A pair of left and right sickle member guide grooves (sickle member guide portions) for guiding 140 in the direction in which the case 140 protrudes and retracts from the case body 101 (directions of arrows A and B) and the direction in which the door frame 300 is engaged with and disengaged from the washer 310 (vertical direction) ) 112A and 112B are formed. One slider guide groove 111A is formed on the inner surface of the lower end of the side wall of the first case member 101A, and the other slider guide groove 111B is formed on the inner surface of the lower end of the side wall of the second case member 101B. Both slider guide grooves 111A and 111B are symmetrically formed to face each other. One sickle member guide groove 112A is formed in the inner surface portion near the tip of the side wall of the first case member 101A, and the other sickle member guide groove 112B is formed in the inner surface portion near the tip of the side wall of the second case member 101B. Yes. Both sickle member guide grooves 112A and 112B are formed symmetrically opposite to each other.

  The sickle member guide grooves 112A and 112B extend from the vicinity of the front ends of the slider guide grooves 111A and 111B to the vicinity of the front end of the case body 101. The sickle member guide grooves 112A and 112B are respectively provided with a horizontal guide portion 112a extending horizontally from the vicinity of the front end of the slider guide grooves 111A and 111B toward the front end side of the case body 101, and further from the front end of the horizontal guide portion 112a. An inclined guide portion 112b extending obliquely upward at an inclination angle of about 45 degrees on the front end side, and a sickle member support portion 112c having a shape that slightly bulges from the upper end of the inclined guide portion 112b to the front end side of the case body 101.

  Rotating member holding holes 115A and 115B are formed in the side walls of both case members 101A and 101B so that both ends of the rotating member 150 are fitted and supported so as to be rotatable. In the ceiling portions of both case members 101A and 101B, there are two inverted trapezoidal fitting grooves 116A and 116B for fitting and holding the upper surface portion of the elastic member 160 to the case body 101 in the front-rear direction. It is formed in the place.

  The slider 120 has a rectangular flat plate-like base part 121 extending in the sliding direction, a bracket part 122 made up of a pair of upstanding walls 122a and 122b erected directly above both left and right sides of the front end part of the base part 121, and a base part 121 It comprises a rack portion 123 formed on the upper surface. The both sides of the lower half of the base portion 121 are slightly overhanging, and the left and right overhanging portions 126 are slidably fitted in the left and right slider guide grooves 111A and 111B of the case body 101, respectively. A shaft hole 124 having the same diameter is formed in the vicinity of the upper ends of both standing walls 122a and 122b of the bracket portion 122 at positions facing each other. The upper end surfaces 125 of both standing walls 122a and 122b of the bracket portion 122 are arc-shaped smooth convex curved surfaces so as to be in sliding contact with the elastic member 160 smoothly.

  The sickle member 140 is composed of a straight body 142 and a sickle 141 that is curved and extended upward from the front end of the body 142 at a substantially right angle. Insertion holes 143 and 144 are formed in the center of gravity and the rear end of the sickle member 140, respectively, and an engagement / disengagement guide pin 145 is inserted in the insertion hole 144 in the center of gravity for sliding in the insertion hole 144 in the rear end. Each guide pin 146 is inserted so as to be rotatable.

  Both end portions of the sliding guide pin 146 are inserted into the shaft holes 124 of both standing walls 122 a and 122 b of the bracket portion 122 of the slider 120. That is, the sliding guide pin 146 is provided horizontally across the upright walls 122a and 122b of the bracket portion 122 of the slider 120, and the sickle member 140 is vertically moved around the sliding guide pin 146. The slider 120 is swingably connected to the slider 120. On the other hand, both end portions of the engagement / disengagement guide pin 145 are slidably inserted into sickle member guide grooves 112 </ b> A and 112 </ b> B provided on the left and right sides of the case body 101.

  A circular convex portion 151 is formed at the center of both ends of the rotating member 150. The pivot member 150 is pivotally fitted into the pivot member holding holes 115 </ b> A and 115 </ b> B on the left and right side walls of the case body 101, so that both ends are supported on the left and right side walls of the case body 101. It is held so that it can rotate in the state.

  A pinion portion 152 that meshes with the rack portion 123 of the slider 120 is formed in a portion of the outer periphery of the rotating member 150 (in the illustrated example, a region that is slightly less than half of the entire outer periphery). A slit-like insertion hole 153 into which the operation shaft 265 is inserted is formed at the center of the rotation member 150. By inserting and fixing the operation shaft 265 in the insertion hole 153, The thumb turn 250 is connected to each other via the operation shaft 265. That is, when the thumb turn 250 is turned, the turning force is transmitted to the turning member 150 via the operation shaft 265, and the turning member 150 is turned in the same direction as the thumb turn 250. In conjunction with the rotation of the rotation member 150, the slider 120 moves to the locking side (direction of arrow A) or the unlocking side (direction of arrow B).

  The elastic member 160 is made of a synthetic resin having elasticity, and two upper surface portions are formed with protrusions 161 having a cross section of an inverted trapezoid and extending in the left and right directions. The protrusions 161 are fitted to the case members 101A and 101B. By being inserted into the mating grooves 116 </ b> A and 116 </ b> B so as to be slid, it is fixed and held on the ceiling portion of the case body 101.

  Concave surface portions 162 a and 162 b that are smoothly curved in an arc shape are formed on the lower surface portion of the elastic member 160 so as to be separated in the sliding direction of the slider 120. The distance between the both concave portions 162a and 162b is equal to the movable distance of the slider 120. That is, the slider 120 is elastically held in the locking position (see FIG. 4) by fitting the upper end surfaces 125 of the both standing walls 122a and 122b of the bracket portion 122 to the front end side, that is, the concave surface portion 162a near the end plate portion 102. The slider 120 is elastically held in the unlocked position (see FIG. 3) by fitting into the concave portion 162b on the rear end side.

  Next, the operation of the lock device 100 configured as described above will be described.

  As shown in FIG. 3, when the locking device 100 is in the unlocked state, the slider 120 is in the unlocked position, that is, the most retracted position in the case body 101. At this time, the sickle member 140 is completely accommodated in the case body 101. At this time, the bracket portion 122 is fitted into the concave surface portion 162b on the rear end side of the elastic member 160, whereby the slider 120 is elastically held in the unlocked position. Further, the engagement / disengagement guide pin 145 is at the most retracted position in the sickle member guide grooves 112A and 112B.

  When the thumb turn 250 is turned to the locking side (clockwise in this example), the rotating member 150 rotates in the locking direction. Since the slider 120 moves to the locking side (direction of arrow A) by the rotation of the rotating member 150 in the locking direction, the sickle member 140 also moves to the locking side (direction of arrow A). At this time, the bracket portion 122 of the slider 120 is disengaged from the concave surface portion 162 b on the rear end side of the elastic member 160 and moves to the front end side while being in sliding contact with the lower surface of the elastic member 160.

  As the sickle member 140 moves toward the locking side (in the direction of arrow A), the engagement / disengagement guide pin 145 is guided by the sickle member guide grooves 112A and 112B and moves from the rear end to the front end side. At that time, the engagement / disengagement guide pin 145 is first guided and horizontally moved by the horizontal guide portions 112a of the sickle member guide grooves 112A and 112B. While the engagement / disengagement guide pin 145 moves in the horizontal guide portion 112a, the sickle member 140 moves forward while keeping the inclined posture (the posture of FIG. 3) with the sickle portion 141 lowered.

  The engagement / disengagement guide pin 145 enters the inclined guide portion 112b when the tip of the sickle portion 141 enters the slit 311 of the washer 310 from the slit 103 of the end plate portion 102. Then, as the sickle member 140 moves to the locking side, the sickle member 140 is guided by the inclined guide portion 112b and moves obliquely upward. As the engagement / disengagement guide pin 145 advances and moves obliquely upward, the sickle member 140 moves up the sickle portion 141 side with the sliding guide pin 146 as a fulcrum and the engagement / disengagement guide pin 145 as a power point. Move forward. The sickle portion 141 passes through the slit 311 of the washer 310 and protrudes into the hole 301 of the door frame 300.

  When the engagement / disengagement guide pin 145 reaches the front end (upper end) of the inclined guide portion 112b, the sickle portion 141 is engaged with the upper edge portion of the slit 311 of the washer 310. At this time, the engaging / disengaging guide pin 145 is at the same height as the sliding guide pin 146.

  As the sickle member 140 moves to the locking side, the engagement / disengagement guide pin 145 enters the sickle member support part 112c through the inclined guide part 112b, and comes into contact with the front end surfaces of the sickle member guide grooves 112A and 112B and stops. . At this time, the sickle member 140 is supported by the engagement / disengagement guide pin 145 and the sliding guide pin 146 and is held in a horizontal posture. Further, the bracket portion 122 is fitted into the concave surface portion 162a on the front end side of the elastic member 160, whereby the slider 120 is elastically held in the locked position. FIG. 4 shows the state at this time.

  As shown in FIG. 4, when the locking device 100 is in the locked state, the slider 120 is in the locked position, that is, the most advanced position in the case body 101. At this time, the sickle portion 141 of the sickle member 140 protrudes from the end plate portion 102 into the hole 301 of the door frame 300 and engages with the upper edge portion of the slit 311 of the washer 310. Further, the engagement / disengagement guide pin 145 is supported by the sickle member support portions 112c of the sickle member guide grooves 112A and 112B. Further, the bracket portion 122 is fitted into the concave surface portion 162a on the front end side of the elastic member 160, whereby the slider 120 is elastically held in the locked position.

  When the thumb turn 250 is turned to the unlocking side (counterclockwise in this example), the turning member 150 is turned to the unlocking side. Since the slider 120 moves to the unlocking side (direction of arrow B) by the rotation of the rotating member 150 to the unlocking side, the sickle member 140 also moves to the unlocking side (direction of arrow B). At this time, the bracket portion 122 of the slider 120 is disengaged from the concave surface portion 162 a on the front end side of the elastic member 160 and moves to the rear end side while being in sliding contact with the lower surface of the elastic member 160.

  As the sickle member 140 moves toward the unlocking side (the direction of arrow B), the engagement / disengagement guide pin 145 is guided by the sickle member guide grooves 112A and 112B and moves from the front end to the rear end side. At that time, the engagement / disengagement guide pin 145 first enters the inclined guide portion 112b from the sickle member support portion 112c of the sickle member guide grooves 112A and 112B. Then, as the sickle member 140 moves to the unlocking side, the sickle member 140 is guided by the inclined guide portion 112b and moves obliquely downward. As the engagement / disengagement guide pin 145 moves backward while moving backward, the sickle member 140 moves down the sickle portion 141 side with the sliding guide pin 146 as a fulcrum and the engagement / disengagement guide pin 145 as a power point. Move backwards. The sickle portion 141 exits the slit 311 of the washer 310.

  The engagement / disengagement guide pin 145 enters the inclined guide portion 112b when the sickle portion 141 has been lowered, and is moved horizontally by being guided by the horizontal guide portion 112a. While the engagement / disengagement guide pin 145 moves in the horizontal guide portion 112a, the sickle member 140 moves backward while keeping the inclined posture (the posture in FIG. 3) with the sickle portion 141 lowered. Then, the sickle member guide grooves 112A and 112B come into contact with the rear end surfaces and stop. At this time, the sickle member 140 is completely accommodated in the case body 101. Further, the bracket portion 122 is fitted into the concave surface portion 162b on the rear end side of the elastic member 160, and the slider 120 is elastically held at the unlocked position.

  According to the above configuration, when the locking device 100 is in the locked state, a sickle member 140 is directly applied to the sickle member 140 by inserting an instrument such as a flathead screwdriver between the sliding door 200 and the door frame 300. Even if 140 is moved toward the unlocking side along the sickle member guide grooves 112A and 112B, the force is directed toward the unlocking side along the slider guiding portions 111A and 111B with respect to the slider 120. Not transmitted. That is, in this example, even if the sickle member 141 side of the sickle member 140 engaged with the washer 310 is forcibly pushed down by an instrument such as a flathead screwdriver, the engagement / disengagement guide pin 145 of the sickle member 140 is not Since the sickle member guide grooves 112 </ b> A and 112 </ b> B are supported by the sickle member support portions 112 c, the sickle portion 141 does not move to the unlocking side (downward), and the force is not transmitted to the slider 120. Therefore, such an unauthorized method cannot release the locked state of the sickle member 140 with respect to the door frame 300. It is extremely difficult to unlock the lock device 100 illegally.

  Further, the locking device 100 includes an elastic member 160 that slides into contact with the slider 120 and elastically holds the slider 120 in the locking position (see FIG. 4) or the unlocking position (see FIG. 3). While being able to hold in the locked state or the unlocked state, it is possible to give the user who has performed the unlocking or locking operation a sense that the unlocking or locking has been performed reliably. By using the elastic member 160, space can be saved and the number of parts can be reduced as compared with the case where a holding mechanism is provided around the rotation member 150 and the like. Cost reduction can be realized at the same time.

Further, in this type of sickle lock, the thumbturn 250 and the slide operator 170 described later are operated in a state where the sliding door 200 is not in contact with the door frame 300 for some reason, and the sickle member 140 is protruded from the case body 101. In this case, if the sliding door 200 is closed in that state, the outer surface of the tip of the sickle portion 141 of the sickle member 140 and the opening edge of the slit 311 of the washer 310 may collide, and the sickle member 140 and the like may be damaged. However, according to the above configuration, such a problem does not occur. That is, in this embodiment, even if the sickle member 140 and the washer 310 collide, the engagement / disengagement guide pin 145 provided in the sickle member 140 is guided to the sickle member guide grooves 112A and 112B, and the case body 101 Since the movement from the front end side to the rear end side of the sickle member 140 is also performed obliquely downward, the sickle part 141 of the sickle member 140 is similarly moved obliquely downward, and the tip outer surface of the sickle part 141 of the sickle member 140 The collision with the opening edge of the slit 311 of the washer 310 is released. Therefore, even if the sliding door 200 is closed with the sickle member 140 protruding from the case body 101, it is caused by a collision between the outer surface of the distal end of the sickle part 141 of the sickle member 140 and the opening edge of the slit 311 of the washer 310. Damage to the sickle member 140 and the like can be avoided.
[Second Embodiment]
FIG. 5 is an exploded perspective view of the lock device of the second embodiment. Constituent elements common to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals in FIG. 5 and description thereof will be omitted as appropriate.

  The locking device 100 shown in FIG. 5 includes a cam 170 as a member for sliding the slider 120 to the locking side (direction of arrow A) and the unlocking side (direction of arrow B). The cam 170 includes a columnar cam body 171 and an arm portion 172 that protrudes outward from the cam body 171 in the radial direction. The surface of the tip portion of the arm portion 172 is a smooth convex curved surface having a circular arc cross section.

  Inside the case body 101, another pair of sickle member guide grooves 113A and 113 having the same shape and the same size are formed behind the pair of left and right sickle member guide grooves 112A and 112B. That is, the sickle member guide groove of the lock device 100 of this embodiment includes two sets of sickle member guide grooves 112A and 112B and sickle member guide grooves 113A and 113.

  A cam fitting hole 127 is formed in the base portion 121 of the slider 120. The arm portion 172 of the cam 170 is inserted into the cam fitting hole 127 with a play, and the arm portion 172 is inserted into the front end of the cam fitting hole 127 according to the turning direction of the cam 170. It engages with the surface 127a or the rear end surface 127b.

  Cam holding holes 117A and 117B are formed in the side walls of both case members 101A and 101B so that both ends of the cam 170 are fitted and supported so as to be rotatable. A circular convex portion (not shown) is formed at the center of both ends of the cam body 171. The cam 170 rotates in a state where both ends are supported on the left and right side walls of the case body 101 by fitting the left and right convex portions into cam holding holes 117A and 117B on the left and right side walls of the case body 101 so as to be rotatable. Held possible.

  A slit-like insertion hole 153 into which the operation shaft 265 (see FIG. 1) is inserted is formed at the center of the cam 170. By inserting and fixing the operation shaft 265 into the insertion hole 153, the cam 170 is inserted. And the thumb turn 250 (see FIG. 1) are connected to each other via an operation shaft 265. That is, by turning the thumb turn 250, the turning force is transmitted to the cam 170 via the operation shaft 265, and the cam 170 rotates in the same direction as the thumb turn 250. In conjunction with the rotation of the cam 170, the slider 120 moves to the locking side (direction of arrow A) or the unlocking side (direction of arrow B).

  A pair of left and right standing walls 122a and 122b constituting the bracket portion 122 of the slider 120 is formed with a shaft hole 128 having a long hole structure extending vertically. Both end portions of the sliding guide pin 147 pass through the left and right shaft holes 188 of the bracket portion 122 and are slidably inserted into the left and right sickle member guide grooves 113A and 113B of the case body 101. On the other hand, both end portions of the engagement / disengagement guide pin 145 are slidably inserted into sickle member guide grooves 112 </ b> A and 112 </ b> B provided on the left and right sides of the case body 101.

  In other words, in this embodiment, the sickle member 140 is connected to the slider 120 via the sliding guide pin 147 so as to be movable in the vertical direction, and is provided with an engagement / disengagement provided between both side walls of the case body 101. Supported by the guide pin 145 for sliding and the guide pin 147 for sliding and moving up and down (in the direction of arrow A and arrow B) and up and down while maintaining a horizontal posture without swinging, It is configured to engage and disengage.

According to the above configuration, when the locking device 100 is in the locked state, even if the sickle member 140 side of the sickle member 140 engaged with the receiving washer 310 is forced to be pushed down with an instrument such as a flathead screwdriver, the sickle member 140. Since the engaging / disengaging guide pin 145 and the sliding guide pin 147 are supported by the sickle member guide portions 112c of the front and rear sickle member guide grooves 112A, 112B and 113A, 113B, respectively, the sickle portion 141 is It does not move to the unlocking side (downward), and the force is not transmitted to the slider 120. Therefore, such an unauthorized method cannot release the locked state of the sickle member 140 with respect to the door frame 300. It is extremely difficult to unlock the lock device 100 illegally.
[Third Embodiment]
FIG. 6 is an exploded perspective view of the locking device of the third embodiment. Constituent elements common to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals in FIG. 5 and description thereof will be omitted as appropriate.

  The locking device 100 shown in FIG. 6 does not use the thumb turn 250 (see FIG. 1) as an operator for locking and unlocking operation, but slides the slide operator 170 to the left and right (directions of arrows A and B) with a finger. Thus, the slider 120 is slid in the unlocking direction via the operation shaft 265. An operation shaft fixing portion 129 is integrally formed with the slider 120. The operation shaft fixing portion 129 is formed with a vertically elongated through hole 129a penetrating in the left-right direction, and an operation shaft 265 is attached through the through hole 129a. A laterally long rectangular through hole 118 is formed on the left and right side walls of the case body 101, and both end portions of the operation shaft 265 are inserted into the through holes 118 so as to be movable left and right (in the directions of arrows A and B). ing.

  The lock device 100 of this embodiment operates in exactly the same manner as the lock device 100 of the first embodiment, except that the unlocking operation is performed by sliding the slide operator 170. Therefore, when the locking device 100 according to this embodiment is in the unlocked state, the sickle member 141 side of the sickle member 140 engaged with the washer 310 (see FIG. 1) should be forcibly pushed down with an instrument such as a flat-blade screwdriver. However, since the engagement / disengagement guide pin 145 supporting the sickle member 140 is supported by the sickle member support portions 112c of the sickle member guide grooves 112A and 112B, the sickle portion 141 moves to the unlocking side (downward). The force is not transmitted to the slider 120. Therefore, such an unauthorized method cannot release the locked state of the sickle member 140 with respect to the door frame 300.

  In the above embodiment, the elastic member 160 is formed separately from the case body 101. However, the case body 101 is formed of synthetic resin, and the elastic member 160 is integrally formed as a part of the synthetic resin case body 101. Needless to say.

  Since the locking device of the present invention can effectively prevent unauthorized unlocking by inserting a tool such as a flathead screwdriver between the fixed frame and the opening / closing body and applying force to the sickle member engaged with the fixed frame, It can be used not only as a sliding door but also as a locking device such as an open door or a folding door.

The disassembled perspective view which shows the principal part of the sliding door apparatus provided with the locking device of 1st Embodiment of the locking device of this invention. The disassembled perspective view of the locking device of 1st Embodiment Sectional drawing which shows the state by which the locking device of 1st Embodiment was unlocked Sectional drawing which shows the state by which the locking device of 1st Embodiment was unlocked Exploded perspective view of the locking device of the second embodiment The disassembled perspective view of the locking device of 3rd Embodiment Sectional drawing which shows an example of the conventional locking device

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Locking device 101 Case body 111A, 111B Slider guide groove (slider guide portion)
112A, 112B Sickle member guiding groove (sickle member guiding portion)
112a Horizontal guide part 112b Inclination guide part 112c Sickle member support part 113A, 113B Sickle member guide groove (sickle member guide groove)
120 Slider 122 Bracket part 123 Rack part 124 Shaft hole 127 Cam fitting hole 129 Operation shaft fixing part 140 Sickle member 141 Sickle part 145 Engaging / disengaging guide pin 146 Sliding guide pin 150 Rotating member 152 Pinion part 160 Elastic member 162a, 162b Concave portion 170 Cam 171 Cam body 172 Arm portion 180 Slide operator 200 Sliding door (opening / closing body)
250 Thumb turn 265 Operation shaft 300 Door frame (fixed frame)
310 Washer (holding member)

Claims (2)

A case body that is attached to the opening / closing body, a slider that slides inside the case body by an operation from outside the case body, and that is connected to the slider and protrudes from the case body by the movement of the slider to the locking side, and engages with the fixed frame And a sickle member
In the case body,
A slider guide portion that linearly guides the slider in the direction in which the sickle member protrudes and retracts, and a sickle member guide portion that guides the sickle member in a direction in which the sickle member protrudes and retracts from the case body and a direction in which the sickle member engages and disengages from the fixed frame are formed. And
The sickle member guiding portion is
A horizontal guide portion extending horizontally to the front end side of the case body, a tilt guide portion extending obliquely upward from the front end of the horizontal guide portion to the front end side of the case body, and an upper end of the tilt guide portion from the upper end of the case body. It consists of a sickle member support that bulges to the front end side,
An engaging / disengaging guide pin and a sliding guide pin are inserted into the center of gravity and the rear end of the sickle member, respectively, and the sickle member is swingable in the vertical direction around the sliding guide pin. Are connected,
As the sickle member moves to the locking side, the engagement / disengagement guide pin enters the sickle member support through the inclined guide portion, and the sickle member is moved by the engagement / disengagement guide pin and the sliding guide pin. A locking device characterized by being configured to be supported and held in a horizontal posture .   2. The locking device according to claim 1, further comprising an elastic member that is in sliding contact with the slider and elastically holds the slider in a locked position or an unlocked position.

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