JP2005042513A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device having a burglarproof function higher than that of a conventional lock device. <P>SOLUTION: The lock device 10 has a turn-of-latch restricting member 70 which enters the turning zone of a sickle member 60 hooked on an hook pin 12 to restrict the turn of the sickle member 60 when a dead bolt 17 is in a lock position. Therefore, the sickle member 60 is not unhooked from the pin 12 unless the turn-of-latch restricting member 70 is turned by a cam turning member 30. Even if the dead bolt 17 is pushed to the unlocking direction, the sickle member 60 is prevented from being moved in interlock with the dead bolt 70 so that the burglarproof function is enhanced as compared with the conventional lock. In the case of unlocking the lock normally, the dead bolt 17 and the sickle member 60 are simultaneously unlocked to enable an easy execution of normal unlocking operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a locking device in which a dead bolt protrudes from a body to lock a door when locked, and a sickle member engages with a destination of the dead bolt.

  Conventionally, this type of locking device is provided with a sickle member cam-engaged on the side surface of the dead bolt, and when the dead bolt moves to the locking position, the sickle member is engaged with the entry point of the dead bolt in conjunction with the dead bolt. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 10-331499 (paragraph [0018], FIGS. 1 and 2)

  However, the immersion control lever of the above-described conventional locking device has a sickle interlocked with the dead bolt when an action such as inserting a tool such as a bar through the gap of the door and urging the dead bolt toward the immersive side is performed. Since the engagement of the members is released, the security function is not sufficient.

  This invention is made | formed in view of the said situation, and aims at provision of the locking device which can improve a crime prevention function conventionally.

  In order to achieve the above object, the locking device according to the invention of claim 1 includes a locking position in which a dead bolt assembled to a body embedded in an end portion of a door projects from the body and locks the door, and the body. In a locking device that slides between the unlocking position where it is immersed and unlocked, the engaged member is provided rotatably at the deadbolt and provided at the tip of the deadbolt when the deadbolt is in the locked position A sickle member that disengages from the engaged member when the dead bolt is in the unlocked position, and a sickle member that is rotatably provided on the dead bolt and when the dead bolt is in the locked position. A latch rotation restricting member that enters the rotation region of the member and restricts the rotation of the sickle member, and a latch biasing means that biases the latch rotation restricting member to enter the rotation region of the sickle member, Latch times by operation The regulating member was provided with a latch release operating portion for rotating so as to retract from the rotation region of the sickle member having features.

  According to a second aspect of the present invention, in the locking device according to the first aspect, the sickle member includes a slit that opens to the tip of the dead bolt and receives the engaged member that crosses the space where the dead bolt enters, When the deadbolt is in the locked position, the slit enters into the opening side from the engaged member in the slit, while when the deadbolt is in the unlocked position, the slit is retracted from the opening side from the engaged member in the slit. It has the characteristics.

  According to a third aspect of the present invention, in the locking device according to the first or second aspect, the body is rotatably provided, and is abutted against the dead bolt at the locking position to restrict the immersion of the dead bolt into the body. A latch rotation restricting member provided with a cam rotation member that is rotated by a locking operation, is released from abutment with the dead bolt at the locking position, and is in sliding contact with a part of the dead bolt, thereby immersing the dead bolt into the unlocking position. And a tilt lever that rotates the latch rotation restricting member by being pushed by the cam rotating member while the dead bolt moves to the unlocking position. The cam rotation member is also used as a latch release operation portion.

  According to a fourth aspect of the present invention, in the locking device according to the third aspect, when the dead bolt is in the locking position, the abutting portion of the cam rotating member with the dead bolt and the rotating shaft are in the sliding direction of the dead bolt. It is characterized by being arranged side by side.

  According to a fifth aspect of the present invention, in the locking device according to the third or fourth aspect, the portion of the dead bolt that is abutted against the cam rotation member at the locking position has an arc corresponding to the rotation locus of the cam rotation member. It is characterized in that the surface is formed.

  A lock set according to the invention of claim 6 is a lock set consisting of the lock device according to claim 2 and a lock box embedded in a door frame and constituting a space into which a dead bolt is immersed, The locking box includes an outer box fixed to the door frame, a slider accommodated inside the outer box so as to be movable up and down, a locked member attached to the slider and received in the slit of the dead bolt, It has a feature in that it includes a biasing means for alignment that biases the slider so that the locked member faces the slit of the dead bolt.

[Invention of Claim 1]
In the locking device according to claim 1, when the dead bolt is in the locking position, the latch rotation restricting member enters the rotation region of the sickle member engaged with the engaged member and restricts the rotation of the sickle member. Therefore, the engagement between the sickle member and the engaged member is not released unless the latch rotation restricting member is rotated by the latch release operation portion. That is, even if the dead bolt is pushed in the unlocking direction, the sickle member is prevented from operating in conjunction with the dead bolt, and the crime prevention function can be improved as compared with the prior art.

[Invention of claim 2]
In the lock device according to the second aspect, when the dead bolt moves to the locking position, the engaged member is received in the slit provided in the dead bolt, and the open side of the slit is closed by the sickle member. That is, when the dead bolt is in the locked position, the engaged member is disposed in the closed space, and even if the entire door is shifted in the vertical direction, the engagement between the engaged member and the dead bolt is not shallow. Unauthorized unlocking operation is prevented.

[Invention of claim 3]
In the locking device according to claim 3, when the cam rotation member is rotated to move the dead bolt to the unlocking position, the tilting lever protruding from the latch rotation restricting member is pushed by the cam rotation member, and the latch rotation is performed. The restricting member rotates and retracts from the rotation area of the sickle member, and the engagement between the sickle member and the engaged member can be released. That is, according to the present invention, when performing the regular unlocking operation, both the dead bolt and the sickle member can be unlocked at a time, and the regular unlocking operation can be easily performed.

[Invention of claim 4]
In the locking device according to claim 4, when the dead bolt is in the locking position, the butted portion of the cam rotating member and the rotating shaft are aligned in the sliding direction of the dead bolt. When pushed, the force applied to the cam contact portion is directed to the center of rotation of the cam rotation member, no rotation moment is generated, and the dead rotation of the dead bolt is maintained by the cam rotation member. Can prevent unauthorized immersive operations.

[Invention of claim 5]
In the locking device according to the fifth aspect of the present invention, the portion of the dead bolt that is abutted against the cam rotation member at the locking position is formed with an arc surface corresponding to the rotation locus of the cam rotation member. Even if the direction of alignment of the rotation axis of the member and the abutting portion of the cam rotation member with the dead bolt is slightly inclined with respect to the sliding direction of the dead bolt, the dead bolt is pushed into the cam rotation member. The force is directed toward the rotation center of the cam rotation member, the rotation of the cam rotation member is restricted, and an illegal immersion operation of the dead bolt can be prevented.

[Invention of claim 6]
In the lock set according to claim 6, even if the entire door is shifted up and down with the dead bolt of the lock device engaged with the locked member of the locking box, the locked member of the locking box together with the door. Moves up and down, preventing deformation of the locked member and preventing unauthorized unlocking operation.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The door indicated by reference numeral 90 in FIG. 1 is rotatably attached to one side (not shown) of the door frame 91 by a hinge (not shown). And the locking device 10 which concerns on this invention is embed | buried in the edge part on the opposite side to a hinge among the doors 90. FIG. An engagement box 11 is embedded in a portion of the door frame 91 that faces the lock device 10.

  The engagement box 11 has a box shape in which the surface facing the lock device 10 is opened, and the engagement pin 12 (“ Corresponding to an “engaged member”).

  As shown in FIG. 1, the locking device 10 is formed by assembling various parts to a body 13 embedded in a door 90. The body 13 has a flat box shape, and the locking devices 10 are fixed to the door 90 by screwing projecting pieces 15 and 15 extending from the front end wall 14 to the end surface of the door 90. A cylindrical dead bolt 17 is inserted into an insertion / extraction hole 16 formed through the front end wall 14 of the body 13. A protruding wall 20 extends from the upper edge of the dead bolt 17 toward both sides. In addition, a pair of guide protrusions 21 and 21 are formed on both side walls 13A of the body 13 so as to be vertically aligned, and the protrusion wall 20 is slidably engaged between the guide protrusions 21 and 21. Thereby, the dead bolt 17 protrudes from the front end wall 14 of the body 13 and enters the engagement box 11 (see FIG. 1), and the dead bolt 17 retracts from the engagement box 11 and enters the body 13. Slide between the unlocked position (see FIG. 2).

  A slit 22 that is opened forward in the sliding direction of the dead bolt 17 is formed at a tip portion of the both side walls 19 and 19 of the dead bolt 17 that enters the engagement box 11. As shown in FIG. When 17 is in the locked position, the engagement pin 12 is received in the slit 22.

  A sickle member 60 is accommodated inside the dead bolt 17. The sickle member 60 is rotatably supported by a shaft body 64 that is interposed between both side walls 19 and 19 of the dead bolt 17. The shaft body 64 is disposed on the rear bolt upper side (upper right side in FIG. 1) of the dead bolt 17. Further, the sickle member 60 is biased to one side (clockwise direction in FIGS. 1 and 2) by the torsion coil spring 66, and when the dead bolt 17 is in the unlocked position, as shown in FIG. Is held at a position in contact with the ceiling surface of the dead bolt 17.

  A pair of locking claws 61 and 62 protrude downward from a portion of the sickle member 60 extending from the front side of the shaft body 64. A lock claw 62 (hereinafter referred to as “first lock claw 62”) on the rotation center side of the sickle member 60 is disposed in the slit 22 as shown in FIG. A front locking claw 61 (hereinafter referred to as a second locking claw 61) on the side away from the center is retracted upward from the slit 22. Then, in the process of moving the dead bolt 17 to the locking position, the first lock claw 62 is pushed into the back side of the slit 22 by the engagement pin 12, whereby the sickle member 60 rotates against the torsion coil spring 66. To do. As a result, when the dead bolt 17 is locked, the second lock claw 61 enters the slit 22 and closes the opening of the slit 22.

  A rotating piece 65 projects from the shaft member 64 toward the rear of the sickle member 60. When the dead bolt 17 is in the unlocked position, the rotating piece 65 faces in the horizontal direction as shown in FIG. Then, when the sickle member 60 resists the torsion coil spring 66 and the second lock claw 61 enters the slit 22, the rotating piece 65 extends obliquely upward from the shaft body 64 as shown in FIG. It becomes a state.

  On the lower right side of the shaft member 64 of the sickle member 60, a shaft member 71 is interposed between both side walls 19, 19 of the dead bolt 17. A latch rotation restricting member 70 is rotatably supported on the shaft 71. A stopper piece 73 projects from the latch turning restricting member 70 toward the turning region of the turning piece 65 of the sickle member 60. Further, a tilting lever 74 extends from the shaft 71 toward the rear of the latch rotation restricting member 70. Further, the latch rotation restricting member 70 is opposite to the sickle member 60 by the torsion coil spring 72 (corresponding to the “latch biasing means” of the present invention) (counterclockwise direction in FIGS. 1 and 2). When the dead bolt 17 is locked, the tilting lever 74 is oriented horizontally and the stopper piece 73 enters the turning area of the turning piece 65 as shown in FIG. Is in a state where the rotation of the is restricted. When the latch rotation restricting member 70 is rotated against the torsion coil spring 72 by pushing down the tilt lever 74, the stopper piece 73 is retracted from the rotation region of the rotation piece 65 as shown in FIG. Thus, the sickle member 60 is allowed to rotate.

  On the rear end face of the dead bolt 17 facing the immersive side to the body 13, a positioning wall 41 protrudes rearward from the upper part and an extension wall 42 extends downward from the lower part. ing. Further, the hook piece 40 described above extends rearward from the lower end portion of the extension wall 42 in one side wall 19, and the tip end side of the hook piece 40 rises vertically upward. A portion surrounded by the positioning wall 41, the extension wall 42, and the hook piece 40 is a cam portion 29, and a rear end edge of the extension wall 42 and a lower end edge of the positioning wall 41 in the cam portion 29 are formed. The corner formed is a locking engagement portion 43, and the bottom of the hook piece 40 is an unlocking engagement portion 44.

  A cam rotating member 30 is provided in the body 13 where the dead bolt 17 is immersed. The cam rotation member 30 is formed by bending a sheet metal, and has a structure in which a pair of strip plates 30A and 30A facing the side wall 13A of the body 13 are connected by a bottom wall 30B. The shaft body 31 penetrating the strips 30A, 30A is fixed so as to penetrate between the side walls 13A, 13A of the body 13. The shaft body 31 is disposed behind the locking engagement portion 43 of the dead bolt 17 in the sliding direction of the dead bolt 17, and the cam rotation member 30 has a horizontal posture and a vertical posture around the shaft body 31. Rotate between.

  An abutting cam pin 32 (corresponding to a “butting portion with a dead bolt in the cam rotating member” according to the present invention) is inserted between the strips 30A and 30A at one end in the longitudinal direction of the cam rotating member 30. Has been passed. Further, as shown in FIG. 3, a cylindrical sliding metal 33 is fitted into a portion of the contact cam pin 32 sandwiched between the strip plates 30A and 30A. When the dead bolt 17 is in the locking position, the cam rotation member 30 is in a horizontal posture, the contact cam pin 32 engages with the lock engagement portion 43, and the contact cam pin 32 is latched to the latch rotation restriction member from below. The tilting lever 74 at 70 is pressed. Here, when the cam rotation member 30 is rotated so that the contact cam pin 32 is directed downward, the tilt lever 74 is pushed down by the contact cam pin 32 and the latch rotation restriction member 70 is also rotated. The stopper piece 73 of the rotation regulating member 70 is retracted from the rotation area of the rotation piece 65 in the sickle member 60. Then, when the dead bolt 17 is retracted into the body 13 by the contact cam pin 32 and the dead bolt 17 is in the unlocked position, the cam rotation member 30 is in a vertical posture as shown in FIG. The cam pin 32 engages with the unlocking engagement portion 44.

  A rotating arm 50 is provided above the cam rotating member 30. The rotary arm 50 has a structure in which a cylindrical body 52 is erected laterally from the central portion of the flat plate member, and a key operation shaft 51 is fitted inside the cylindrical body 52. The key operation shaft 51 is coupled to a key cylinder (not shown) fixed to the outer surface of the door 90. The key operation shaft 51 and the key operation shaft 51 together with the key operation shaft 51 are rotated by inserting a key (not shown) into the key cylinder. 50 rotates. Further, the one end portion of the rotating arm 50 and the rear end portion of the cam rotating member 30 are connected by a link 53, whereby the cam rotating member 30 rotates in conjunction with the rotating arm 50. Further, one end of a torsion coil spring 56 is attached to the other end of the rotary arm 50. The other end of the torsion coil spring 56 is engaged with a fixed shaft 57 provided at a horizontal position in the horizontal direction with respect to the rotation center of the rotary arm 50 in the body 13. As a result, when the rotary arm 50 is oriented in the horizontal direction, both ends of the torsion coil spring 56 are closest to each other to exert a resilience, and the rotary arm 50 is in any diagonal direction with respect to the horizontal direction. It is energized to face.

Next, operation | movement of the locking device 10 of this embodiment which consists of the said structure is demonstrated.
To lock the locking device 10, the door 90 is closed, and the rotary arm 50 is rotated clockwise in FIG. 2 by a key operation. Then, the cam rotation member 30 changes from a vertical posture to a horizontal posture, and in this process, the contact cam pin 32 moves the cam portion 29 of the dead bolt 17 forward. At this time, the latch rotation restricting member 70 is rotated by the elastic force of the torsion coil spring 72 so that the tilt lever 74 of the latch rotation restricting member 70 follows the contact cam pin 32.

  As the dead bolt 17 moves forward, the tip of the dead bolt 17 enters the inside of the engagement box 11 provided in the door frame 91 and enters the slit 22 at the tip of the dead bolt 17 as shown in FIG. The engagement pin 12 is received. Then, the first lock claw 62 is pushed into the back side of the slit 22 by the engagement pin 12, whereby the sickle member 60 is rotated and the second lock claw 61 enters the opening side of the slit 22.

  When the rotation of the rotary arm 50 further proceeds, the dead bolt 17 slides further to the locked position, and in conjunction with this slide, the second lock claw 61 of the sickle member 60 closes the opening side of the slit 22. The engagement pin 12 is held in the slit 22 (that is, the sickle member 60 is engaged with the engagement pin 12).

  When the rotary arm 50 is rotated to the end, the contact cam pin 32 is brought into sliding contact with the arc surface 43A of the locking engagement portion 43. At this time, the dead bolt 17 and the sickle member 60 are stopped and latched with the cam rotation member 30. The rotation restricting member 70 is slightly rotated. Then, the stopper piece 73 of the latch turning restricting member 70 enters the turning area of the turning piece 65 of the sickle member 60, and the turning of the turning piece 65 is restricted as shown in FIG. . The contact cam pin 32 contacts the lower side of the positioning wall 41 of the dead bolt 17 and is positioned at the unlocking engagement portion 44 of the dead bolt 17. Thus, the locking device 10 is locked.

  Now, for example, when a bar is inserted between the door 90 and the door frame 91 and the dead bolt 17 is pushed in the immersive direction while the locking device 10 is locked, an illegal act is performed as follows. That is, in the locking device 10 of the present embodiment, the stopper piece 73 of the latch rotation restricting member 70 enters the rotation area of the rotation piece 65 in the sickle member 60 and restricts the rotation of the sickle member 60. Therefore, even if the dead bolt 17 is slightly pushed in the immersion direction, the sickle member 60 is not interlocked with the dead bolt 17 unless the latch rotation restricting member 70 is rotated by the cam rotating member 30. The engagement between the sickle member 60 and the engagement pin 12 is not illegally released.

  Since the engagement pin 12 is received in the slit 22 provided in the dead bolt 17, the opening of the slit 22 is closed with the sickle member 60, and the engagement pin 12 is disposed in the closed space. Even if the entire 90 is shifted in the vertical direction, the engagement between the engagement pin 12 and the dead bolt 17 is not shallow, and an unauthorized unlocking operation is prevented.

  In the locking device 10 of the present embodiment, when the dead bolt 17 is in the locked position, the contact cam pin 32 and the shaft body 31 of the cam rotating member 30 are aligned in the sliding direction of the dead bolt 17. Since the contact cam pin 32 is abutted against the end face of the dead bolt 17, the force applied to the contact cam pin 32 when the dead bolt 17 is pushed is directed toward the rotation center of the cam rotation member 30, and the rotational moment is increased. Does not occur. In addition, an arc surface 43A corresponding to the turning locus of the contact cam pin 32 when the cam turning member 30 is rotated is formed in a portion of the dead bolt 17 that contacts the contact cam pin 32 at the locking position. Therefore, even when the alignment direction of the contact cam pin 32 and the shaft body 31 of the cam rotation member 30 is slightly inclined with respect to the sliding direction of the dead bolt 17, the force when the dead bolt 17 is pushed is cam. The rotation of the rotation member 30 faces the rotation center, and the rotation of the cam rotation member 30 is restricted, so that the dead bolt 17 can be prevented from being immersed.

  By the way, when unlocking the locking device 10, the rotary arm 50 is rotated in the counterclockwise direction in FIG. 1 by operating a key inserted into a key cylinder (not shown). Then, the cam rotation member 30 changes from a horizontal posture to a vertical posture (see FIG. 2). In this process, the abutting cam pin 32 pulls the cam portion 29 (specifically, the hook piece 40) of the dead bolt 17 rearward, and the dead bolt 17 is pulled into the back of the body 13 and is latched by the abutting cam pin 32. The tilt lever 74 of the rotation restricting member 70 is pushed down and the latch turning restricting member 70 is also turned, and the stopper piece 73 of the latch turning restricting member 70 is retracted from the turning region of the turning piece 65 in the sickle member 60. . Then, the sickle member 60 is rotated by the elastic force of the torsion coil spring 66, the engagement with the engagement pin 12 is released, the dead bolt 17 is immersed in the body 13, and the door 90 is opened and closed. Will be able to.

  Thus, in the locking device 10 of the present embodiment, when the dead bolt 17 is in the locking position, the latch rotation restricting member 70 enters the rotation region of the sickle member 60 engaged with the engagement pin 12 and Since the rotation of the sickle member 60 is restricted, the engagement between the sickle member 60 and the engagement pin 12 is not released unless the latch turning restriction member 70 is turned by the cam turning member 30. That is, even if the dead bolt 17 is pushed in the unlocking direction, the sickle member 60 is prevented from operating in conjunction with the dead bolt 17, and the crime prevention function can be improved as compared with the prior art. Moreover, when performing a regular unlocking operation, both the dead bolt 17 and the sickle member 60 can be unlocked at a time, and a regular unlocking operation can be easily performed.

[Second Embodiment]
This embodiment is shown in FIGS. 4 to 7, and only the configuration of the locking box is different from the first embodiment. The locking box 80 of the present embodiment has a structure in which an upper and lower slider 82 is provided inside an outer box 81 embedded in a door frame 91, and a front and rear slider 92 including the locking pin 12 is attached to the upper and lower slider 82. ing. The outer box 81 has a box shape in which the front side facing the lock device 10 is open, and has a structure in which mounting pieces 81A and 81A protrude in the vertical direction from the upper and lower edges on the front surface. Further, from the bottom surface of the outer box 81, a spring locking wall 83 is formed upright by cutting out a part of the bottom surface into a protruding piece shape. A portion of the spring locking wall 83 is recessed backward to form a spring accommodating portion 84.

  The vertical slider 82 has a structure in which a pair of opposing walls 85, 85 laid on both side walls of the outer box 81 are connected by a front wall 86 and a rear wall 87. A large long hole 99 </ b> A and a small long hole 99 </ b> B are formed side by side in the advancing / retreating direction of the dead bolt 17 at a position closer to the upper end of the opposing walls 85, 85. Further, the front wall 86 is disposed on the front lower end side of the space sandwiched between the opposing walls 85, 85, while the rear wall 87 is disposed on the rear lower end side. Further, a spring accommodating hole 88 corresponding to the spring accommodating portion 84 of the outer box 81 is formed in the front wall 86.

  The vertical slider 82 is accommodated in the outer box 81 with the front wall 86 disposed in front of the spring locking wall 83 in the outer box 81. Then, the spring accommodating hole 88 of the upper and lower sliders 82 and the spring accommodating portion 84 of the outer box 81 are overlapped, and the compression coil spring 96 (corresponding to the “alignment biasing means” of the present invention) is accommodated therein. Yes.

  A front plate 95 is attached to the front surface of the outer box 81. A rectangular window 95 </ b> W is formed on the front plate 95, and a lower edge portion of the rectangular window 95 </ b> W is overlapped with the front wall 86 of the vertical slider 82. Thereby, the compression coil spring 96 is held so as not to be detached from the spring accommodating hole 88 and the spring accommodating portion 84. Then, when the vertical slider 82 moves upward (see FIG. 7) and when the vertical slider 82 moves downward (see FIG. 6), the rear wall 87 is compressed and deformed. As a result, the vertical slider 82 is biased to an intermediate position of a stroke that can move up and down.

  A front / rear slider 92 is housed inside the upper / lower slider 82. The front / rear slider 92 has a structure in which the locking pin 12 is inserted between both ends of a U-shaped base member 92B. Further, the locking pin 12 passes through one end side of the both side surfaces of the base member 92B, and both end portions thereof protrude laterally from one end portion of the base member 92B. Further, a sliding projection 94 projects from the other end of the base member 92B. Then, both end portions of the locking pin 12 are fitted into the large long hole 99A of the outer box 81, and the sliding projection 94 is fitted into the small long hole 99B. On the other hand, it can move back and forth. Further, as shown in FIG. 5, a compression coil spring 97 is housed in a stretched state between the rear end surface of the front / rear slider 92 and the rear wall 87 of the outer box 81, whereby the upper / lower slider 82 is urged forward. Has been.

  Embosses 82E and 92E for locking the end portions of the compression coil springs 97 are formed on the rear end surface of the front / rear slider 92 and the rear surface wall 87 of the outer box 81, respectively.

  According to the configuration of the present embodiment, when the dead bolt 17 is inserted into the locking box 80 as shown in FIG. 5, the locking pin 12 is pressed against the inner part of the slit 22 in the dead bolt 17 to ensure engagement. Match. Then, when the entire door 90 is shifted downward with the locking pin 12 engaged with the dead bolt 17 as shown in FIG. 6, or the entire door 90 is shifted upward as shown in FIG. In this case, since the locking pin 12 in the locking box 80 slides up and down together with the door 90, the locking pin 12 is prevented from being deformed by shifting the entire door up and down, and unauthorized unlocking operation is prevented. Can do.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.
(1) In the above-described embodiment, the cam rotation member 30 is interlocked with the rotary arm 50 rotated by a key operation. However, the cam rotation member itself is directly rotated by a key operation. Also good.

(2) In the above embodiment, the rotary arm 50 and the cam rotation member 30 are rotated by key operation. However, the rotation arm and / or the cam is rotated by a knob (thum turn) provided on the outer surface of the door. You may make it the structure which rotates a member.

(3) Although the engaging pin 12 as the engaged member according to the present invention has a pin shape with a circular cross section, it may not necessarily have a pin shape, for example, a plate shape.

(4) In the above embodiment, the sickle member 60 is engaged with the engagement pin 12 across the space in the engagement box 11, but the sickle member is engaged with the opening edge of the engagement box. It may be.

(5) In the above-described embodiment, the cam rotation member 30 is also used as the “latch release operation portion” according to the present invention for rotating the sickle member 60. You may make it the structure provided separately from the rotation member.

Side sectional view when the locking device according to one embodiment of the present invention is in a locked state Side sectional view when the locking device is unlocked Plan sectional view when the locking device is locked The disassembled perspective view of the latching box which concerns on 2nd Embodiment of this invention. Side cross-sectional view of locked locking box Side sectional view of the locking box when the door is shifted downward Side sectional view of the locking box when the door is shifted upward

Explanation of symbols

10 Locking device 12 Engaging pin (engaged member)
13 Body 17 Dead Bolt 30 Cam Rotating Member 32 Contact Cam Pin 43A Arc Surface 60 Sickle Member 61 Second Lock Claw 62 First Lock Claw 65 Rotating Piece 70 Latch Rotation Restricting Member 72 Torsion Coil Spring (Latch Energizing Means)
73 Stopper piece 74 Tilt lever 80 Locking box 81 Outer box 82 Vertical slider 90 Door 92 Front / rear slider 96 Compression coil spring

Claims (6)

A dead bolt assembled to the body embedded in the end of the door slides between a locked position that protrudes from the body and locks the door, and an unlocked position that enters the body and releases the lock. In the locking device,
When the deadbolt is rotatably provided and engages with an engaged member provided at the insertion destination of the deadbolt when the deadbolt is in the locked position, while the deadbolt is in the unlocked position A sickle member that releases the engagement with the engaged member;
A latch rotation restricting member that is provided rotatably on the dead bolt, and enters the rotation region of the sickle member to restrict the rotation of the sickle member when the dead bolt is in the locking position;
Latch urging means for urging the latch rotation restricting member to enter the rotation region of the sickle member;
A locking device comprising: a latch release operating portion for rotating the latch rotation restricting member so as to retract from the rotation region of the sickle member by operation. A slit that opens to the tip of the dead bolt and receives the engaged member across the space where the dead bolt enters,
The sickle member projects into the opening side from the engaged member in the slit when the dead bolt is in the locked position, while the engaged member in the slit when the dead bolt is in the unlocked position. The lock device according to claim 1, wherein the lock device is configured to retreat from the opening side. The body is rotatably provided, and is abutted against the dead bolt at the locking position to restrict the immersion of the dead bolt into the body, and is rotated by an unlocking operation, and the dead bolt at the locking position And a cam rotation member that is brought into sliding contact with a part of the dead bolt and immerses the dead bolt into the unlocked position,
The latch rotation restricting member protrudes from the latch rotation restricting member toward the rotation region of the cam rotating member, and the dead bolt is pushed by the cam rotating member in the middle of moving to the unlocking position. The locking device according to claim 1, wherein the cam rotation member is also used as the latch release operation portion by providing a tilting lever that rotates the cam.   When the dead bolt is in the locked position, the abutting portion of the cam rotation member with the dead bolt and the rotation shaft are arranged so as to be aligned in the sliding direction of the dead bolt. The locking device according to claim 3.   5. The arc surface corresponding to the rotation locus of the cam rotation member is formed at a portion of the dead bolt that is abutted against the cam rotation member at the locking position. The locking device according to 1. A lock set comprising the lock device according to claim 2 and a locking box embedded in a door frame and constituting a space into which the dead bolt is immersed,
The locking box is an outer box fixed to the door frame, a slider accommodated inside the outer box so as to be movable up and down, and is attached to the slider and is received by the slit of the dead bolt. A lock set comprising: a locked member; and a biasing means for positioning that biases the slider so that the locked member faces the slit of the dead bolt.

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