JP4495489B2 - Thumb turn and lock - Google Patents

Description

  The present invention relates to a lock and a thumb turn employed for the lock, and more particularly to a device capable of preventing unauthorized unlocking referred to as a thumb turn.

  2. Description of the Related Art Conventionally, locks for locking and unlocking by using a lock bolt to move in and out by rotating a knob member have been adopted for entrance doors and the like. In the lock, the main body is embedded in the door and fixed so that the dead bolt can protrude and retract from the side of the door. When the lock is used for locking the door of the front door, a cylinder lock for locking and unlocking the lock is provided on the outdoor side of the door, and a knob member is attached on the indoor side.

  The dead bolt enters and exits from the side surface of the door by rotating a cylinder lock or a knob member. The door frame to which the door is fixed is provided with a storage portion that can store a dead bolt protruding from the side surface of the door. The door is brought into a locked state or an unlocked state by rotating the cylinder lock or the knob member and moving the dead bolt into and out of the storage portion.

  On the other hand, in recent years, there has been a crime to pierce a house with a technique called so-called thumb turn, in which a hole is drilled in the door with a drill, etc. It is rampant and has become a social problem. In order to solve this problem, for example, as shown in Patent Document 1 below, there has been proposed a measure for preventing unauthorized unlocking by so-called thumb turn by providing a thumb turn cover at a position surrounding a knob member of a door.

In addition, there is a lock provided with a knob member as shown in Patent Document 2 below in order to prevent unauthorized unlocking due to the thumb turn described above. The knob member disclosed in Patent Document 2 has a knob part that is detachable and prevents unauthorized unlocking by removing the knob part.
JP 2003-056218 A Japanese Patent Laid-Open No. 11-200678

  As disclosed in Patent Document 1, if a thumb turn cover is provided around the knob member, even if a tool or the like is inserted by opening a hole in the door, the tool hardly reaches the knob member. Therefore, if the knob member is protected by a thumb turn cover as disclosed in Patent Document 1, unauthorized opening of the door can be prevented.

  However, when the thumb turn cover is provided as described above, it is necessary to open the thumb turn cover lid each time the knob member is rotated. In addition, when the knob member is surrounded by the thumb turn cover, the finger must be put in the area surrounded by the thumb turn cover to operate the knob member, which makes the thumb turn operation a little inconvenient. Furthermore, when providing the thumb turn cover, there is a problem that the crime prevention effect against the thumb turn is reduced by half if the lid is forgotten to close. In addition, even when the knob portion of the knob member is configured to be detachable as in Patent Document 2, there is a problem that if the knob portion is forgotten to be pulled out, the effect of illegal unlocking by turning the thumb turn cannot be exhibited at all.

  In view of such a problem, an object of the present invention is to provide a thumb turn and a lock with high crime prevention characteristics that can cope with so-called thumb turn rotation while maintaining operability of normal locking and unlocking operations.

Unauthorized unlocking, commonly referred to as thumb-turn turning, applies external force by inserting a tool, etc., through a gap in the vicinity of the door where the thumb-turn is installed or a hole opened in the door, and hooking the tool to the knob. It is done by the technique of letting you operate the thumb turn. Therefore, when the above-described unauthorized unlocking is performed, a large external force acts in the direction in which the knob member moves , unlike the case where the thumb turn is normally operated by picking the knob with a finger.

Therefore, the invention according to claim 1 provided on the basis of such knowledge has a knob and a rotary shaft, and is supported integrally with the knob member movably supported in a predetermined direction, and rotates integrally with the knob member. A rotation preventing means and a braking means capable of approaching and moving away from the rotation preventing means. The rotation preventing means has a peripheral wall portion, and an engaging portion is provided on the peripheral wall portion. The means has an engaged part that can be engaged with the engaging part of the rotation preventing means, and rotates around a predetermined braking rotation axis. The engaging portion of the means is in a position where the engaging portion cannot be engaged, and the engaging portion of the rotation preventing means moves to the rotation region of the engaged portion along with the movement of the rotating shaft and the engaging portion of the braking means. The joint portion is close to the rotation prevention means, and the engaging portion and the engaged portion of the braking means are engaged to support the rotation shaft so that it cannot rotate. A thumb turn, characterized in that it is.

  In the thumb turn according to the present invention, the engagement portion of the rotation preventing means is always at a position deviated from the locus of movement of the engaged portion of the braking means. Therefore, in the thumb turn of the present invention, as long as it is normally operated, the rotation preventing means is in a freely rotatable state, and the knob member can be freely operated.

On the other hand, in the thumb turn of the present invention, when the rotation shaft is moved by an external force acting on the knob member in an attempt to perform unauthorized unlocking such as turning the thumb turn, the rotation prevention means moves, and the engagement portion of the rotation prevention means is the braking means. The rotating shaft becomes non-rotatable. Therefore, according to the present invention, it is possible to provide a thumb turn excellent in crime prevention characteristics against unauthorized unlocking such as a thumb turn turning operation of the knob member.

The invention according to claim 2 includes a knob member that has a knob and a rotation shaft and is supported so as to be movable in a predetermined direction, a rotation prevention means that rotates integrally with the knob member, and a rotation prevention means. In contrast, it has a braking means capable of approaching and separating, and a separating means for separating the braking means from the rotation preventing means to form a separating structure, and the separating structure is released as the rotating shaft moves , and the braking means is The thumb turn is characterized in that it is engaged with the rotation prevention means in the vicinity of the rotation prevention means and the rotation shaft is supported so as not to rotate.

  In the thumb turn of the present invention, when the rotation shaft is in the normal position, the braking means is located away from the rotation prevention means, and the rotation prevention means is in a freely rotatable state. Therefore, the thumb turn of the present invention can be freely operated as long as the knob is picked and a normal operation is performed.

On the other hand, in the thumb turn of the present invention, when the rotation shaft moves , the separation structure between the unlocking prevention means and the braking means is released, the braking means comes close to the rotation prevention means, and the braking means and the rotation prevention means are engaged. The rotation shaft becomes non-rotatable. Therefore, even if the thumb turn of the present invention tries to perform an unauthorized unlocking like a thumb turn, the rotation shaft of the knob member moves and becomes unable to rotate.

According to a third aspect of the present invention, there is provided a knob member that has a knob and a rotation shaft and is supported so as to be movable in a predetermined direction, a rotation prevention means that rotates integrally with the knob member, and a rotation prevention means. The brake means capable of approaching and separating, and the separation means for supporting the brake means in a state separated from the rotation prevention means to form a support structure. The rotation prevention means is predetermined according to the movement of the knob member. is intended to move along a trajectory, away means forms the supporting structure by crossing the contact the track on the outer peripheral portion of the rotating blocking means is in place, the support structure, rotating is released with the movement of the blocking means, braking means engage close to the rotation prevention means on the condition that the support structure is released, characterized by blocking the rotation of the knob member It is a thumb turn.

In general, as long as the knob is picked and rotated, the rotation shaft of the knob member and the rotation preventing means that rotates integrally with the knob do not move , but are assumed to rotate at a predetermined position. Thumb turn of the present invention, when the rotation shaft of the gripping member is in place, the thumb-turn of the present invention, in a state that release the braking means from rotation blocking means by separating means, freely rotating the knob member It is possible to make it. Therefore, the thumb turn according to the present invention does not require any special operation as long as it is normally performed, and is excellent in operability.

On the other hand, when trying to push the knob in an attempt to illegally unlock, an external force in the direction in which the knob is pushed acts on the knob. As described above, in the thumb turn of the present invention, the knob member is supported so as to be movable in a predetermined direction. Therefore, when an external force is applied in this direction, the knob member and the rotation preventing means that rotates integrally with the knob member move . Thumb turn of the present invention is the rotation preventing means is canceled if you move the support structure, the braking means and the rotation prevention means is in the engaged state, the knob member becomes non-rotatable. Therefore, according to the present invention, it is possible to prevent unauthorized unlocking of the mouth and mouth that applies an external force to the knob member such as a thumb turn.

According to a fourth aspect of the present invention, the separating means has a support portion whose tip is in contact with the braking means and is rotatable about a predetermined center of rotation, and is capable of moving the knob member at an intermediate portion of the support portion. 4. The thumb turn according to claim 3, wherein the trajectory formed by the movement of the rotation preventing means intersects.

In the thumb turn according to the present invention, the separation means is supported in a cantilevered state with the support portion being rotatable, and is arranged so that the intermediate portion thereof intersects the locus formed by the movement of the rotation prevention means. Has been. Therefore, in thumb turn of the present invention, the tip rotating blocking means is in contact only with braking means slightly moves greatly moved. Accordingly, in the thumb turn of the present invention, when the picking member moves to forcefully push the picking member, the separating means reacts sensitively, the support structure is released, and the picking member cannot be rotated. Therefore, according to the present invention, it is possible to provide a thumb turn having extremely excellent crime prevention characteristics.
According to the fifth aspect of the present invention, the braking means and the separating means are each urged with a predetermined urging force in a direction close to the rotation preventing means, and the urging force acting on the braking means acts on the separating means. 5. The thumb turn according to claim 2, wherein the thumb turn is smaller than an urging force.
In the thumb turn of the present invention, both the braking means and the separating means are energized, and the energizing force for energizing the separating means for separating the braking means when the rotation preventing means is in a predetermined position is the braking means. It is larger than the urging force acting on. Therefore, the thumb turn of the present invention maintains the state where the braking means and the rotation prevention means are separated as long as the rotation prevention means is in a predetermined position. Therefore, the thumb turn of the present invention does not cause a malfunction such that the brake member and the rotation preventing unit are engaged with each other unless the knob member is moved by unauthorized unlocking or the like, and the knob member becomes inoperable.

Invention according to claim 6, rotation preventing means, Ri rotatable der around a rotation center of Jo Tokoro, the projecting portion can penetrate with the movement of rotation prevention means, in the circumferential direction of the protruding portion a thumb turn according to any one of claims 1 to 5, characterized in that it is prevented from moving.

Thumb turn of the present invention act external force against the knob member due to unauthorized unlocking like, moving the rotation preventing means Then, protrusions enter City invasion, it becomes impossible rotation of the rotation preventing means. Therefore, according to the present invention, it is possible to provide a thumb turn excellent in crime prevention characteristics against unauthorized unlocking such as thumb turn.

Here, the thumbturns according to claims 1 to 6 are all connected to an operating mechanism for moving a locking piece such as a dead bolt, and when the lock is in the locked state, an external force is applied to the knob member. The brake means and the rotation prevention means are engaged by utilizing the movement of the rotating shaft by acting to prevent the knob member from rotating. Therefore, in the thumb turn according to the first to sixth aspects, when the lock is in the locked state at the time of construction, the rotation preventing means is in a predetermined posture, and an external force is applied in a direction opposite to the direction in which the knob can move. However, there is a possibility that the crime prevention characteristic cannot be fully exhibited unless the rotation shaft is constructed so as not to rotate.

Accordingly, in one aspect of the invention that will be provided on the basis of this finding, the rotation preventing means, and the outer peripheral portion, and a protrusion protruding from the outer peripheral portion radially outward, the rotational center of the predetermined rotation region It is arranged so as to be rotatable as a center, and a movement blocking part for blocking the movement of the protruding part in the circumferential direction is provided in the rotation region .

In this thumb turn, the movement blocking portion protrudes in the rotation region, and the rotation of the rotation blocking means is restricted. Therefore, this thumb turn has a configuration in which the knob member cannot be operated unless the knob member is attached in a predetermined posture, and allows the installer to recognize that the attachment posture of the knob member is incorrect. Therefore, according to this thumb turn , it is possible to provide a thumb turn that can prevent a mistake in attaching the knob member and reliably exhibit the crime prevention characteristics.

In the invention according to claim 7, provided based on the same knowledge, the rotation preventing means includes an outer peripheral portion and a protruding portion protruding radially outward from the outer peripheral portion, and a predetermined rotation region. It is arranged so as to be rotatable around the center of rotation, and in the rotation region, when an external force having a component opposite to the direction in which the knob member can move acts on the knob member, contact a thumb turn according to any one of claims 1 to 6, characterized in that movement preventing portion for preventing the rotation of the rotation preventing member is provided.

In the thumb turn of the present invention, when an external force is applied to the knob member in a predetermined direction, the knob member and the rotation prevention means move in a predetermined direction, but when an external force is applied in the opposite direction, the rotation prevention is performed. The protruding portion of the means abuts against the movement preventing portion provided in the rotation region, and the knob member cannot be rotated. That is, the thumb turn of the present invention can turn the knob from a predetermined posture in a certain direction (forward direction), but cannot turn it in the opposite direction. Therefore, the thumb turn of this invention notices the mistake of the attachment attitude | position of a knob member at the time of the operation confirmation after construction, even if the attachment attitude | position of a knob member is mistaken at the time of installation construction. Therefore, according to the present invention, it is possible to prevent the crime prevention characteristic from being deteriorated due to a wrong mounting posture of the knob member.

In the thumb turn according to any one of claims 1 to 7, the knob member may be in a positional relationship in which the rotary shaft and the knob are eccentric. (Claim 8)

The invention according to claim 9, the brake means is a thumb turn according to any one of claims 1 to 8, characterized in that it is biased in a direction toward the rotation preventing means.

According to this configuration, when the knob member receives an external force due to unauthorized unlocking and the rotation prevention unit moves , the rotation prevention unit and the biasing unit are immediately engaged to prevent the knob member from rotating. .

The invention according to claim 10 has an operation mechanism for allowing the locking piece to enter and exit from the lock box, and the thumb turn according to any one of claims 1 to 9 is connected to the operation mechanism. Is a lock.

In any of the thumbturns according to the first to ninth aspects, even if an attempt is made to operate the knob member illegally by means of a thumb turn, the knob member is locked and cannot be rotated. Therefore, the lock of the present invention has a high crime prevention performance against unauthorized unlocking such as thumb turn.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to lock and unlock normally by normal operation, the thumb turn and lock which were excellent in the crime prevention property which cannot be unlocked even if an illegal unlocking called a thumb turn is tried can be provided.

  Next, a thumb turn which is an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a thumb turn according to the present embodiment. FIG. 2 is an exploded perspective view of the thumb turn shown in FIG. FIG. 3 is a sectional view of the thumb turn shown in FIG. 4 to 10 are diagrams showing components of the thumb turn shown in FIG. FIG. 11 is a conceptual diagram showing the internal structure and operation of the thumb turn shown in FIG. FIG. 12 is a perspective view showing an installed state of the lock provided with the thumb turn shown in FIG. FIG. 13 is a perspective view showing a lock body employed in the lock shown in FIG. FIG. 14 is a conceptual diagram showing a modification of the thumb turn shown in FIG. In the following description, the vertical positional relationship is based on the state in which the thumb turn is arranged in the posture shown in FIG. 1 and the like unless otherwise specified.

  1-3, 1 is the thumb turn of this embodiment. The thumb turn 1 has a knob member 5 inserted through the through hole 3 of the cap member 2. As shown in FIGS. 2 and 4, the through-hole 3 has a shape extending from a substantially central portion to a slightly eccentric position toward the radially outer side (downward in the state of FIG. 2). Therefore, the knob member 5 can be slightly tilted in the up-down direction in the extending direction of the through hole 3, that is, in the state shown in FIG. Further, a screw insertion hole 4 for screwing the thumb turn 1 is provided above the through hole 3.

  The knob member 5 is made of metal and has a configuration in which the knob 6 and the rotary shaft 8 are integrated. The knob 6 has a flat knob 7 and a connecting shaft 10 as shown in FIGS. The knob portion 7 is a portion for an operator to pick with a finger in order to operate the thumb turn 1. As shown in FIG. 2, the connecting shaft 10 protrudes from a position eccentric to the one end side from the center position of the knob 7 and is a portion to which the rotating shaft 8 is connected. The connecting shaft 10 has a stopper engaging portion 11 at the base portion and a pin hole 12 at the tip portion. The stopper engaging portion 11 is formed by chamfering three surfaces of a cylindrical shaft body, and has a substantially “U” shape in cross-sectional view.

  As shown in FIG. 6, the rotary shaft 8 has a recess 13 formed on one end side for inserting the tip of the connecting shaft 10 of the knob member 5. The rotation shaft 8 is provided with a pin hole 15 penetrating through the recess 13. The rotating shaft 8 is integrated with the knob 6 by inserting the connecting shaft 10 of the knob member 5 into the recess 13 and inserting the pin over the pin holes 12 and 15. Four grooves 16 are formed at equal intervals in the circumferential direction at the distal end portion of the rotating shaft 8 and are formed so that the front view is substantially cross-shaped.

  A base member 20 is housed inside the cap member 2. The base member 20 includes a lock piece 30, a release piece 40, and a stopper member 50 that can be independently rotated with respect to the base member 20.

  As shown in FIG. 2, the base member 20 has an outer diameter substantially the same as the inner diameter of the cap member 2 and has a disk shape. The base member 20 has a flat back surface as shown in FIG. 7, but the front surface has a complicated shape to ensure a space in which the lock piece 30, the release piece 40, and the stopper member 50 can rotate.

  A shaft insertion hole 21 through which the rotation shaft 8 can be inserted and two locking portions 22 are formed at a position slightly deviated radially outward (downward in the state shown in FIG. 2) from the center position of the base member 20. , 22 are provided. The shaft insertion hole 21 is formed at a position corresponding to the lower end side of the through hole 3 when the base member 20 is placed in the cap member 2. The locking portions 22 are notches that are continuous with the shaft insertion hole 21, and two locking portions 22 are arranged above the shaft insertion hole 21. The locking portion 22 is formed by cutting substantially vertically upward from above the peripheral portion of the shaft insertion hole 21.

  A bulging portion 25 is provided above the shaft insertion hole 21 and between the two locking portions 22 and 22. The bulging portion 25 protrudes to the surface side of the base member 20. In the bulging portion 25, a screw insertion hole 26 a communicating with the screw insertion hole 4 of the cap member 2 in a state of being accommodated in the cap member 2, and a screw hole for screwing the back plate 29 attached to the cap member 2 26b. Further, a peripheral wall 27 having a shape along the outer periphery of the base member 20 and the outer periphery of the shaft insertion hole 21 is formed below the base member 20, that is, at a position opposite to the locking portions 22 and 22 and the bulging portion 25. ing. Further, a rotation prevention piece 23 is formed at a position substantially in the center of the peripheral wall 27 and facing the bulging portion 25. The rotation prevention piece 23 protrudes to the surface side of the base member 20 similarly to the bulging portion 25, and protrudes from the inner peripheral surface of the peripheral wall 27 toward the radial center of the base member 20 (inside the shaft insertion hole 21). Yes.

  The part on the radial outside of the shaft insertion hole 21 above the peripheral wall 27 is made thinner than the part corresponding to the peripheral wall 27 and the bulging portion 25 as shown in FIG. This is a part that functions as a piece accommodating space V for accommodating the lock piece 30 and the release piece 40 when accommodated in the member 2. In the piece accommodating space V, a region V1 on one side (left side in FIG. 2) partitioned with a virtual line L connecting the rotation prevention piece 23 and the center of the base member 20 as a boundary is for mounting the lock piece 30 A projection 28a is provided, and a projection 28b for mounting the release piece 40 is provided in the region V2 on the other side (right side in FIG. 2). The protrusion 28 a is located on the upper side of the base member 20 and adjacent to the bulging portion 25. Further, the protrusion 28 b is provided at a position adjacent to the right side of the shaft insertion hole 21.

  The lock piece 30 is a member having an outer curved surface 31 and an inner curved surface 32 which are curved in a shape along the inner circumference of the cap member 2 and the outer circumference of the base member 20 as shown in FIGS. A shaft hole 33 for inserting the protrusion 28a is formed on one end side of the lock piece 30, and a protruding piece 35 protruding in a tapered shape is formed on the tip end side thereof. The lock piece 30 is supported so as to be rotatable with respect to the base member 20 around a protrusion 28 a inserted through the shaft hole 33.

  On the other hand, on the other end side of the lock piece 30, a lock piece 36 protruding in a direction intersecting the inner curved surface 32 is formed. In addition, the lock piece 30 is formed with a spring mounting hole 38 that opens to the outer curved surface 31 and for mounting the spring 37. The lock piece 30 is urged in a direction in which the outer curved surface 31 is separated from the inner peripheral surface of the cap member 2 by a spring 37 mounted in the spring mounting hole 38.

  The release piece 40 functions as a trigger for the operation of the lock piece 30 and extends in a direction intersecting the main body 41 from the middle part of the main body 41 and the main body 41 as shown in FIGS. And the release piece 43 (support part). The main body 41 has an outer curved surface 45 that is curved along the inner circumference of the cap member 2 and the outer circumference of the base member 20. A shaft hole 46 is formed on one end side of the main body 41. The release piece 40 is rotatably supported around the protrusion 28b by inserting the protrusion 28b through the shaft hole 46.

  On the other end side of the main body 41, a spring mounting hole 48 that opens to the outer curved surface 45 and for mounting the spring 47 is formed. The release piece 40 is biased in a direction in which the other end side of the main body 41 is separated from the inner peripheral surface of the cap member 2 by a spring 47 mounted in the spring mounting hole 48.

  In a state where the release piece 40 is mounted on the protrusion 28b of the base member 20, the release piece 43 crosses the regions V1 and V2 in the piece accommodating space V, and the inner curved surface 32 of the lock piece 30 whose tip is mounted on the protrusion 28a. It is said that it reaches the length. As described above, the lower end side of the main body 41 is supported so as to be rotatable about the projection 28b, and the upper end side is biased by the spring 47, so that the release piece 43 is biased downward. ing. Therefore, the release piece 43 is in surface contact with the outer peripheral surface of the stopper member 50 attached to the rotary shaft 8 inserted through the shaft insertion hole 21.

  Here, the spring 47 that biases the release piece 40 has a stronger elastic force than the spring 37 that biases the lock piece 30. Therefore, the release piece 40 is normally in contact with the inner curved surface 32 of the lock piece 30 to push the lock piece 30 toward the inner wall surface side of the cap member 2.

  The stopper member 50 is a member made of metal and having a substantially oval shape, and is a member attached to the stopper engaging portion 11 of the knob 6. The stopper member 50 includes a stopper main body 51 and projecting pieces 52 and 52 protruding in the vertical direction from the outer peripheral portion of the stopper main body 51.

  The stopper main body 51 has a two-stage shape in the thickness direction as shown in FIG. 2, and includes a large diameter portion 51a having a large circumscribed circle diameter and a small diameter portion 51b having a small circumscribed circle diameter. A shaft engaging hole 54 that penetrates the large-diameter portion 51a and the small-diameter portion 51b is formed in a substantially central portion of the stopper main body 51. The shaft engagement hole 54 is a through-hole having a substantially “U” shape in plan view, and has a shape along the outer diameter of the stopper engagement portion 11 of the knob 6.

The large-diameter portion 51a has arc-shaped peripheral wall portions 53 and 53 facing each other, and concave portions 55 and 55 that are recessed toward the center of the circumscribed circle of the peripheral wall portion 53 are provided in the middle portion of the peripheral wall portions 53 and 53. Yes. The projecting piece portions 52 and 52 protrude in parallel to the radial direction of the circumscribed circle of the peripheral wall portion 53 from one end side (right side in FIG. 10A) of the peripheral wall portions 53 and 53, that is, from one side of the concave portions 55 and 55. ing. In the large diameter portion 51 a, the radius rc 2 of the circumscribed circle of the projecting piece portions 52, 52 is substantially the same as the inner diameter ri of the shaft insertion hole 21.

The small-diameter portion 51 b is a substantially oval portion having an outer shape formed by arc-shaped peripheral wall portions 56, 56 and flat portions 57, 57 that are horizontal with respect to the radial direction of the circumscribed circle of the peripheral wall portion 56. The radius rc 1 of the circumscribed circle of the peripheral wall portion 56 is substantially the same as the distance rd between the center of the shaft insertion hole 21 and the inner peripheral surface of the rotation prevention piece 23.

  The thumb turn 1 includes an unauthorized unlocking prevention mechanism including the base member 20, the lock piece 30, the release piece 40, and the stopper member 50 in the cap member 2, and the knob member 5 is connected to the operation mechanism. Have a configuration. That is, in the thumb turn 1, the unauthorized unlocking prevention mechanism operates in conjunction with the operation of the knob member 5.

  More specifically, the base member 20 is housed in a posture in which the surface faces the open end side of the cap member 2 and the position of the shaft insertion hole 21 matches the through hole 3 of the cap member 2. A lock piece 30 is mounted on the protrusion 28 a of the base member 20 accommodated in the cap member 2 such that the outer curved surface 31 faces the inner peripheral surface of the cap member 2. A spring 37 is mounted in the spring mounting hole 38 of the lock piece 30. The lock piece 30 is urged by a spring 37 in a direction in which the lock piece 36 is close to the center side (the shaft insertion hole 21 side) of the cap member 2.

The release piece 40 is attached to the base member 20 so that the outer curved surface 45 of the main body 41 faces the inner peripheral surface of the cap member 2 and the release piece 43 faces the lock piece 30 side. A spring 47 is mounted in the spring mounting hole 48 opened in the outer curved surface 45. In the release piece 40, the upper end side of the main body 41 is biased toward the center side of the cap member 2 by the action of the spring 47, and the release piece 43 is biased downward. In this state, the release piece 43 is in a state in which the distal end portion 43 a abuts on the inner curved surface 32 of the lock piece 30 and the intermediate portion 43 b circumscribes the peripheral wall portion 56 of the stopper member 50. That is, the release piece 43 intersects the locus of the stopper member 50 that moves with the eccentricity (movement) of the knob member 5 at the intermediate portion 43b.

  In the state where the lock piece 30 and the release piece 40 are attached to the base member 20 as described above, the knob 6 is inserted through the through hole 3 and the shaft insertion hole 21 from the outside of the cap member 2 and attached. In this state, the connection shaft 10 and the stopper engaging portion 11 of the knob 6 are exposed in the piece accommodating space V. A stopper member 50 is mounted on the stopper engaging portion 11 of the knob 6 from the open end side of the cap member 2 in such a posture that the large diameter portion 51a faces inward (base member 20 side). In a state where the stopper member 50 is attached to the knob 6, the large diameter portion 51 a is accommodated in the shaft insertion hole 21, and the peripheral wall portion 56 of the small diameter portion 51 b is in surface contact with the inner peripheral surface of the rotation prevention piece 23. It is in a state. In this state, the knob 6 is in a state of being rotatably supported with respect to the base member 20.

  The knob 6 is connected to the rotary shaft 8 by inserting the connecting shaft 10 protruding into the internal space of the cap member 2 into the recess 13 of the rotary shaft 8. The knob 6 is integrated by a pin driven over the pin holes 12 and 15.

  The thumb turn 1 is connected to an operation mechanism in the lock body 61 attached in the door 62 as shown in FIG. 12 via the rotary shaft 8 to form a lock 60. The lock 60 incorporates an operating mechanism (not shown) for allowing the dead bolt 63 (locking piece) and the latch 65 to enter and exit from the lock body 61 as in the case of a conventionally known lock. The lock 60 is connected to the thumb turn 1 or the cylinder lock 66 attached to the door 62. The cylinder lock 66 has the same structure as a conventionally known one, and when a key is inserted into the keyhole and rotated, a tongue piece 69 protruding to the back side rotates in conjunction with this. The lock 60 can be unlocked by operating the thumb turn 1 to rotate the rotating shaft 8 or rotating the tongue piece 69 by operating a key inserted into the cylinder lock 66.

As shown in FIG. 13 , the lock body 61 has two openings 70 and 71 on the front surface 67 and the back surface 68. In the opening 70, an engaging portion 74 that is a part of the above-described operation mechanism and engages with the rotating shaft 8 of the thumb turn 1 and the tongue piece 69 of the cylinder lock 66 is exposed. The dead bolt 63 enters and exits from the side surface 72 of the lock body 61 in conjunction with the rotation of the rotary shaft 8 and the tongue piece 69. Further, a square hole 73 that constitutes a part of the above-described operation mechanism is exposed in the opening 71. The square hole 73 is for inserting a square core 76 as a support shaft of the door handle 75.

  The lock 60 is used by embedding a lock body 61 in a door 62 as shown in FIG. The lock body 61 is installed such that the side surface 72 faces the side surface 77 side of the door 62 and the dead bolt 63 and the latch 65 can protrude from the side surfaces 72 and 77. Further, attachment holes 81 and 82 are formed in the front surface 78 and the back surface 80 of the door 62 at positions corresponding to the openings 70 and 71 of the lock body 61, respectively.

  A square core 76 is inserted into the door 62 so as to pass through the attachment hole 82 and the opening 71, and door handles 75 are fixed to both ends of the square core 76. When the door handle 75 is rotated, the latch 65 of the lock 60 enters and exits from the side surface 77 of the door 62 in conjunction with this rotation.

  A cylinder lock 66 is mounted in the mounting hole 81 provided on the back surface 80 side of the door 62 as shown in FIG. The cylinder lock 66 is fixed with the front side with a keyhole (not shown) facing outward and the tongue piece 69 on the back side engaged with the engaging portion 74. Therefore, when the key is inserted into the cylinder lock 66 and rotated, the operation mechanism in the lock body 61 is operated in conjunction with this, and the dead bolt 63 enters and exits from the side surface 77 of the door 62.

On the other hand, the thumb turn 1 is fixed to the mounting hole 81 provided on the front surface 78 side of the door 62 by screwing the cap member 2 to the pedestal 85 as shown in FIGS. The thumb turn 1 is constructed so that the state in which the flat knob 7 is tilted horizontally becomes a locked state as shown in FIGS. That is, the thumb turn 1 has a knob member so that the extending direction of the knob portion 7 and the sliding direction (eccentric direction , moving direction ) of the knob member 5 and the stopper member 50 attached thereto cross when the thumb turn 1 is locked. 5 is installed.

  Next, operations of the thumb turn 1 and the lock 60 according to this embodiment will be described in detail with reference to the drawings. When the lock 60 is in the locked state, the thumb turn 1 is configured such that the large-diameter portion 51a of the stopper member 50 attached to the knob member 5 is accommodated in the shaft insertion hole 21 and the small-diameter portion 51b is on the shaft insertion hole 21 side. The protruding inner surface of the locking portion 22 and the release piece 43 of the release piece 40 are in surface contact and sandwiched. In this state, the stopper member 50 is in a posture in which one of the recesses 55 and 55 faces the lock piece 30 side.

  When the knob 7 is picked and rotated in the direction of arrow A with the knob 7 in a horizontal state (locked state) as shown in FIG. 11A, the stopper member 50 rotates in the cap member 2 in conjunction with this. Move. At this time, the release piece 43 of the release piece 40 is in surface contact with the periphery of the small diameter portion 51 b of the stopper member 50, and the lock piece 30 is pressed against the inner peripheral wall side of the cap member 2. Therefore, as long as the thumb turn 1 is picked and turned, the thumb turn 1 can be unlocked without performing any special operation.

On the other hand, when an external force F1 that pushes up the knob portion 7 to try to perform unauthorized unlocking, which is called thumb turn, acts, the knob member 5 is tilted upward by the knob portion 7 side by this external force F1, and the axial center position is eccentric. (Move) . Thereby, the stopper member 50 mounted at a position close to the knob 7 is lifted upward as shown in FIG.

When the stopper member 50 is moved upward, the release piece 43 of the release piece 40 that is in surface contact with the peripheral portion of the small diameter portion 51b is rotated about the protrusion 28b and tilted upward. When the release piece 43 is inclined, the release piece 43 is lifted upward as indicated by an arrow r in FIG. As a result, the lock piece 30 is released from the support structure in which the release piece 43 is configured to abut against the inner curved surface 32 of the lock piece 30. The urging force of the spring 37 acts to start rotating around the protrusion 28a inserted through the shaft hole 33, and the lock piece 36 moves to the center side of the cap member 2 and is released as shown in FIG. The tip of the piece 43 abuts against the protruding piece 35 of the lock piece 30, and the lock piece 36 of the lock piece 30 further approaches the stopper member 50 side by a cam action.

When the knob member 5 is moved under the influence of an external force, the protruding portion 52 protruding from above the large-diameter portion 51a of the stopper member 50 in the locked state is a locking portion 22 that is continuous with the shaft insertion hole 21 of the base member 20. Invade inside. In this state, the recess 55 of the stopper member 50 is in a position where the lock piece 36 of the lock piece 30 can enter. Therefore, the lock piece 36 of the lock piece 30 is rotated by the influence of the urging force of the spring 37 and the above-described cam action and enters the recess 55. Thereby, the stopper member 50 and the knob member 5 are brought into a state in which they cannot rotate.

When the external force acting on the position where the knob 7 is moved is released, the force to lift the release piece 40 upward is lost. Further, the elastic force of the spring 37 urging the lock piece 30 is smaller than the elastic force of the spring 47 urging the release piece 40. Therefore, when the action of the external force disappears, the release piece 43 of the release piece 40 moves downward by the action of the spring 47 and pushes the inner curved surface 32 of the lock piece 30. As a result, the lock piece 30 rotates around the protrusion 28 a and the lock piece 36 comes out of the recess 55 of the stopper member 50. Thereafter, the stopper member 50 and the knob member 5 connected thereto return to a horizontal state and return to a rotatable state.

  In the thumb turn 1 described above, the operating mechanism having the lock piece 30, the release piece 40 and the stopper member 50 is actuated by receiving a force forcibly lifting the knob member 5 upward to prevent the knob member 5 from rotating. Is. Therefore, if the thumb turn 1 is attached with an incorrect attachment posture, and if it is attached so as to be unlocked by turning the knob 7 downward (B direction in FIG. 11A), the operating mechanism is It does not work and cannot exhibit crime prevention characteristics. Therefore, in order to prevent such a construction error, the thumb turn 1 of the present embodiment is provided with projecting pieces 52, 52 on the outer peripheral portion of the large diameter portion 51a of the stopper member 50, and the large diameter portion 51a is located in the shaft insertion hole 21. The rotation prevention piece 23 is provided at a position where it comes into contact with the protruding piece portion 52 when the knob 7 is rotated in a state where it is housed in a horizontal posture. For this reason, the thumb turn 1 of the present embodiment cannot be rotated below the horizontal position around the rotation shaft 8. Therefore, even if the knob portion 7 is attached so as to be unlocked when the knob portion 7 is in the horizontal position due to an installation error, the knob portion 7 cannot be operated, and the operator will notice the installation error.

As described above, when the thumb turn 1 applies an unreasonable external force F1 to try to unlock it, the rotation shaft 8 is tilted, and the stopper member 50 attached thereto moves in the direction in which the external force acts. . Thereby, the stopper member 50 pushes away the release piece 43 of the release piece 40 that has been in contact with the peripheral wall portion 56 of the small-diameter portion 51b, and the release piece 40 is configured to be in contact with the inner curved surface 32 of the lock piece 30. While the structure is released, the lock piece 36 of the lock piece 30 and the recess 55 of the stopper member 50 are engaged to make the knob member 5 non-rotatable.

  Furthermore, when the external force F1 is applied to the thumb turn 1, the protruding piece 52 of the stopper member 50 enters the locking portion 22 communicating with the shaft insertion hole 21 to form a locking structure, and the stopper member 50 is the base member. 20 cannot be rotated. Therefore, when the thumb turn 1 tries to perform an unauthorized unlocking like a thumb turn, the engagement structure constituted by the lock piece 36 and the recessed portion 55, and the engagement constituted by the projecting piece portion 52 and the engagement portion 22. A structure is formed, and the knob member 5 becomes completely unrotatable. Therefore, the thumb turn 1 of this embodiment is excellent in crime prevention characteristics against unauthorized unlocking such as thumb turn.

On the other hand, in the thumb turn 1, since the stopper member 50 is urged downward by the release piece 43 of the release piece 40, the rotary shaft 8 and the stopper member 50 move as long as the knob 7 is picked and operated as usual. do not do. Therefore, the thumb turn 1 can be locked and unlocked by the same operation as the thumb turn generally used conventionally.

  The thumb turn 1 of the present embodiment is provided with a rotation prevention piece 23 that protrudes radially inward in the shaft insertion hole 21 in which the stopper member 50 is accommodated, and that restricts the movement of the protruding piece portion 52 in the circumferential direction. . Therefore, the thumb turn 1 cannot turn the knob 7 downward (in the direction of arrow B) from the posture shown in FIG. That is, the thumb turn 1 cannot rotate below the horizontal position when the tip portion 7a of the knob 7 is locked. Therefore, even if an external force F2 directed in the direction of arrow B in FIG. 11 or downward is applied in an attempt to rotate the thumb, the knob member 5 does not rotate and the lock 60 is not unlocked.

  The thumb turn 1 can turn the knob 5 from the horizontal posture in the direction of arrow A (forward direction) but cannot turn in the direction of arrow B (reverse direction). Therefore, even if the thumb turn 1 has a wrong mounting posture of the knob member 5 at the time of mounting construction, the thumb member 5 cannot be operated when checking the operation after the construction, and the thumb turn 1 becomes aware of the wrong mounting posture. Therefore, the thumb turn 1 does not deteriorate in the crime prevention characteristic due to the wrong attachment of the knob member 5.

  The thumb turn 1 is at a position where the knob 7 of the knob 5 is eccentric with respect to the rotation shaft 8. Therefore, the thumb turn 1 only needs to be provided with an unauthorized unlocking prevention mechanism capable of dealing with the external force F1 acting in the direction of pulling the knob 7 upward, and an unauthorized unlocking prevention mechanism for the external force F2 acting on the opposite side is necessary. And not. Therefore, the thumb turn 1 has a simple structure of the unauthorized unlocking prevention mechanism, and the number of parts required for manufacturing and the manufacturing cost are low.

In the thumb turn 1 described above, since the lock piece 30 is urged toward the stopper member 50 by the spring 37, the lock piece 30 and the stopper member are immediately moved when the stopper member 50 moves upward due to the external force F1 acting by unauthorized unlocking. 50 engages. Therefore, according to the thumb turn 1 of the present embodiment, the knob member 5 can be prevented from rotating by reacting immediately to unauthorized unlocking.

  In the thumb turn 1, the spring 47 biasing the release piece 40 has a larger biasing force than the spring 37 biasing the lock piece 30. Therefore, the thumb turn 1 can maintain the state that the lock piece 30 is separated from the release piece 40 and can freely operate the knob member 5 unless an external force F1 that pushes the knob member 5 upward is applied.

  Further, the thumb turn 1 is brought into contact with the small diameter portion 51b of the stopper member 50 integrated with the knob member 5 by the release piece 40, and the knob member 5 is biased downward. Therefore, in the thumb turn 1, as long as the normal operation is performed, the knob member 5 hardly tilts, and the unauthorized unlocking prevention mechanism does not malfunction.

In the thumb turn 1, as shown in FIG. 11C, since the stopper member 50 is in contact with the intermediate portion 43b of the release piece 43 of the release piece 40, an external force F1 in the direction of lifting upward is applied to the knob member 5. When the stopper member 50 moves , the stopper member 50 moves greatly as indicated by the arrow y with respect to the movement amount x. Therefore, in the thumb turn 1, when the external force F1 acts, the release piece 40 and the lock piece 30 react sensitively, and the operation of the knob member 5 becomes impossible. Therefore, the thumb turn 1 has extremely excellent crime prevention characteristics.

  As shown in FIG. 11, the thumb turn 1 has a knob member 5 such that the tip 7a of the knob portion 7 faces leftward in the locked state when observed from the open end side (the side opposite to the knob portion 7) of the cap member 2. However, the present invention is not limited to this, and the knob member 5 may be mounted so as to face right as shown in FIG. In this case, the thumb turn 1 is in a state in which the stopper member 50 is inverted by 180 ° with respect to the state shown in FIG. 11, but in the same manner as the thumb turn 1 described above, The unauthorized unlocking prevention mechanism is actuated to prevent the knob member 5 from rotating.

  The thumb turn 1 has a configuration in which the lock piece 30 and the release piece 40 are urged by the springs 37 and 47. However, the present invention is not limited to this. For example, the lock piece 30 and the release piece 40 may be operated only by a cam-like mechanism that rotates the lock piece 30 by abutting the release pieces 43 of the 40 against the protruding pieces 35. According to this configuration, the configuration of the thumb turn 1 can be further simplified, the number of parts can be reduced, and the manufacturing process can be simplified.

It is a perspective view which shows the thumb turn of one Embodiment of this invention. It is a disassembled perspective view of the thumb turn shown in FIG. It is sectional drawing of the thumb turn shown in FIG. (A) is a front view which shows the cap member employ | adopted in the thumb turn shown in FIG. 1, (b) is AA sectional drawing of the same (a). (A) is a front view which shows the knob member employ | adopted in the thumb turn shown in FIG. 1, (b) is an A direction arrow directional view of (a), (c) is a B direction arrow directional view of (a). (D) is a C direction arrow view of (a). (A) is a partially broken front view which shows the rotating shaft employ | adopted in the thumb turn shown in FIG. 1, (b), (c) is an A, B direction arrow directional view of (a), respectively. (A) is a back view of the base member employed in the thumb turn shown in FIG. 1, (b) is a cross-sectional view taken along line AA of (a), and (c) is a front view of the base member shown in (a). (D) is the B direction arrow directional view of (a), (e) is CC sectional drawing of (a). (A) is a partially broken front view showing the lock piece employed in the thumb turn shown in FIG. 1, (b) and (c) are views in the direction of arrows A and B of (a), and (d). FIG. 3 is a rear view of (a). (A) is the partially broken front view which shows the cancellation | release piece employ | adopted as the thumb turn shown in FIG. 1, (b), (c) is an A, B direction arrow view of (a), respectively (d). FIG. 3 is a rear view of (a). (A) is a partially broken front view showing a stopper member employed in the thumb turn shown in FIG. 1, (b) and (c) are views in the direction of arrows A and B of (a), and (d). FIG. 3 is a rear view of (a). It is a conceptual diagram which shows the internal structure and operation | movement of a thumb turn shown in FIG. It is a perspective view which shows the installation state of the lock | rock provided with the thumb turn shown in FIG. It is a perspective view which shows the lock body employ | adopted in the lock shown in FIG. It is a conceptual diagram which shows the modification of the thumb turn shown in FIG.

DESCRIPTION OF SYMBOLS 1 Thumb turn 5 Picking member 6 Picking 7 Picking part 8 Rotating shaft 20 Base member 21 Shaft insertion hole 22 Locking part 23 Rotation prevention piece 30 Lock piece 36 Lock piece 37, 47 Spring 40 Release piece 43 Release piece 50 Stopper member 52 Projection piece Part 55 Recess 60 Lock

Claims (10)

A knob member having a knob and a rotation shaft, supported so as to be movable in a predetermined direction, a rotation prevention means that rotates integrally with the knob member, and a braking means that can move closer to and away from the rotation prevention means The rotation prevention means has a peripheral wall portion, and an engagement portion is provided on the peripheral wall portion, and the braking means is an engaged portion that can be engaged with the engagement portion of the rotation prevention means. And is rotated around a predetermined braking rotation axis, and is normally in a position where the engaging portion of the rotation preventing means and the engaged portion of the braking means cannot be engaged, and the rotating shaft With the movement of the engagement portion, the engaging portion of the rotation preventing means moves to the rotation region of the engaged portion, the engaged portion of the braking means approaches the rotation preventing means, and the engaged portion and the braking means are engaged. A thumb turn characterized in that the rotating shaft is supported in a non-rotatable manner by engaging with a joint portion. A knob member having a knob and a rotation shaft, supported so as to be movable in a predetermined direction, a rotation prevention means that rotates integrally with the knob member, and a braking means that can move closer to and away from the rotation prevention means And a separation means for separating the braking means from the rotation prevention means to form a separation structure, and the separation structure is released with the movement of the rotation shaft, and the braking means is rotated close to the rotation prevention means. A thumb turn which engages with the blocking means and is supported so that the rotating shaft cannot rotate. A knob member having a knob and a rotation shaft, supported so as to be movable in a predetermined direction, a rotation prevention means that rotates integrally with the knob member, and a braking means that can move closer to and away from the rotation prevention means A separating means for supporting the braking means in a state separated from the rotation preventing means to form a support structure, and the rotation preventing means moves along a predetermined locus as the knob member moves. There, separating means, the support structure is formed by crossing the contact the track on the outer peripheral portion of the rotating blocking means is in place, the support structure is released with the movement of the rotating blocking means , braking means, thumb turn that the support structure is engaged in close proximity to the rotation prevention means on condition that it is released, characterized by blocking the rotation of the knob member. The separating means has a support portion whose tip abuts against the braking means and is rotatable about a predetermined rotation center, and the rotation preventing means moves in accordance with the movement of the knob member at an intermediate portion of the support portion. The thumb turn according to claim 3, wherein the formed trajectories intersect. Braking means and separating means is biased in a direction toward the respective Rotation blocking means at a predetermined biasing force, the biasing force acting on the braking means being smaller than the urging force acting on the separating means The thumb turn according to any one of claims 2 to 4 . Rotation preventing means, Ri rotatable der around a rotation center of Jo Tokoro, the projecting portion can penetrate with the movement of rotation prevention means, and characterized in that it is prevented from moving in the circumferential direction of the protruding portion The thumb turn according to any one of claims 1 to 5 . The rotation preventing means has an outer peripheral portion and a protruding portion protruding radially outward from the outer peripheral portion, and is disposed so as to be rotatable around a rotation center in a predetermined rotation region. shall be from the direction movable knob member has an external force having a direction opposite the component contacts the protrusion when acting on the knob member, the movement preventing portion is provided to prevent rotation of the rotation preventing member The thumb turn according to any one of claims 1 to 6. The thumb turn according to any one of claims 1 to 7, wherein the knob member has a positional relationship in which the rotary shaft and the knob are eccentric. Braking means, thumb turn according to any one of claims 1 to 8, characterized in that it is biased in a direction toward the rotation preventing means. A lock having an operation mechanism for allowing the locking piece to enter and exit from the lock box, and the thumb turn according to any one of claims 1 to 9 being connected to the operation mechanism.

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