JP4359461B2 - Security thumb turn - Google Patents

Description

  The present invention regulates the rotation of the plate-shaped knob projected on the indoor side surface of the door in accordance with the input state of the rotational operation force, thereby reducing the rotational operation force for an unauthorized unlocking operation on the lock box. It relates to a security thumb turn that disables input.

  Lock boxes are provided at the entrance doors of condominiums and houses, and the lock box has a built-in locking / unlocking mechanism that locks and unlocks the door by engaging and disengaging the dead bolt that has been advanced and retracted from the door mouth. ing. Locking / unlocking operation force is input to the lock box from the outdoor side of the door by a cylinder lock, and locking / unlocking operation force can be input from the indoor side of the door by thumb turn. That is, from the outdoor side, it is necessary to perform an operation with a key lock of the cylinder lock, while from the indoor side, it is possible to perform locking and unlocking by a rotation operation only with a knob without using the key lock.

This type of thumb turn has a blade-shaped knob that protrudes perpendicularly to the indoor surface side of the door, as disclosed in Patent Document 1 below. This knob is connected to a locking / unlocking mechanism of the lock box via a thumb turn shaft. Therefore, from the indoor side, by picking this knob with a finger and rotating it forward and backward, the rotational operation force is transmitted directly to the lock box via the thumb turn shaft, and the dead bolt is advanced and retracted by the locking and unlocking mechanism. The lock operation can be performed easily.
Japanese Patent Publication No. 2-157715 (Fig. 1b, Fig. 1c)

  However, in recent years, glass-fitted small windows for producing luxury and elegance tend to be adopted especially for entrance doors and joinery around the doors. When the small window glass is broken at the door with a small window, the thumb turn is inserted by inserting a hand from the outside and operating the thumb turn illegally, or inserting a wire or a rod with its tip bent into a bowl shape. There is a risk of unauthorized operation.

  In general, a rotary thumb turn often used for doors has a knob that is exposed on the indoor side with a wing protruding outward from the center of rotation in the radial direction. In some cases, an unauthorized unlocking operation can be performed by hooking the bowl-shaped tip of the bent and giving a rotational moment.

  In addition, even in a door without a small window as described above, if a hole or gap for inserting a wire, such as a post opening, is in the door itself or a wall near the door, the thumb turn is similarly unlocked. There was a fear.

  The present invention has been made in view of the above circumstances, and provides a crime prevention thumb turn that can prevent unauthorized unlocking by rotating the thumb turn by hooking an inserted wire or bar to the thumb turn, and to improve crime prevention performance. With the goal.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The crime prevention thumb turn 100 according to claim 1 of the present invention regulates the rotation of the knob 21 projected on the indoor side surface of the door in accordance with the input state of the rotational operation force, thereby providing a lock provided on the door. A security thumb turn 100 for disabling the input of a rotational operation force for unlocking the box,
A knob 21 connected to the thumb turn shaft 15 for transmitting the operating force to the lock box and movable outward in the rotational radial direction with respect to the thumb turn shaft 15;
A rotation regulating member 29 provided outside the rotation locus circle of the knob 21 and contacting the knob 21 moved outward in the radial direction of rotation to prevent the knob 21 from rotating;
An urging means 27 for returning the knob 21 interposed and moved between the thumb turn shaft 15 and the knob 21 to an original position;
It is characterized by comprising.

  In this crime prevention thumb turn 100, when the same rotational moment in the opposite direction with respect to the rotation center axis is applied to the knob 21, the knob 21 does not move outward in the radial direction of rotation and rotates without interfering with the rotation restricting member 29. The rotational operation force by the knob 21 is input to the lock box via the thumb turn shaft 15. On the other hand, when the knob 21 is hooked with the wire inserted into the indoor side, or when the knob is pushed with the inserted rod, the knob 21 is moved outward in the radial direction of the rotation and is rotated against the rotation regulating member 29. This prevents the operation force from being input by the knob 21. As a result, illegal unlocking that rotates the knob 21 by, for example, hooking the inserted wire or bar to the knob is prevented, and crime prevention is improved.

In the crime prevention thumb turn according to claim 1 , the thumb turn shaft 15 is formed in a square shape in cross section, and engages with the end portion 17 of the thumb turn shaft 15 in a square shape in the center at the rear surface of the knob 21 so as not to be relatively rotatable. A rectangular slide hole 23 guided by the end portion 17 so as to be movable outward in the radial direction of rotation is formed, and the knob is interposed between the both side surfaces of the thumb turn shaft 15 and the slide hole 23. A pair of urging members 27 and 27 for returning 21 to the original position are provided.

  In the crime prevention thumb turn 100, the knob 21 cannot be rotated relative to the thumb turn shaft 15, and can be moved outward in the rotational radial direction, and the moved knob 21 includes a pair of urging members 27, 27 made of a coil spring or the like. The original position is automatically restored by the biasing force. Accordingly, the transmission of the rotational operation force to the thumb turn shaft 15 and the movement of the knob 21 outward in the rotational radial direction can be reliably realized with a robust and simple structure.

The crime prevention thumb turn 100 according to claim 2 is the crime prevention thumb turn 100 according to claim 1 , wherein an inclined surface 33 is formed on the surface of the knob 21 to gradually reduce the thickness T toward the outer side in the rotational radius direction. It is characterized by being.

  In the crime prevention thumb turn 100, even if a hooking force by a wire or a pressing force by a bar is applied in a direction perpendicular to the knob 21, the knob 21 is moved from the force (synthetic force) by the inclined surface 33 of the knob 21 in the radial direction of rotation. A component force to move outward is generated, and the knob 21 is easily moved. Therefore, when a force in the moving direction is applied, the knob 21 can be moved even when a force in the vertical direction is applied to the knob 21, and crime prevention against illegal unlocking using a wire, a bar or the like is provided. Increased further.

The crime prevention thumb turn 100 according to claim 1 , wherein the rotation restricting member 29 includes an arcuate peripheral wall 29 a erected around the knob along the rotation locus circle, and the knob 21 is formed on the peripheral wall 29 a. The outer end portion 21a includes a cutout portion 29b that can be entered, and the cutout portion 29b is disposed to face the outer end portion 21a of the knob 21 at the locking position.

  In this security thumb turn 100, the knob 21 is easy to enter the notch 29b at the time of the initial unlocking operation using a wire, a bar or the like, and after the rotation is started by a normal rotation operation, the outer end of the knob 21 is secured. The portion 21a rotates while being in sliding contact with the inner peripheral surface of the peripheral wall 29a, and the peripheral wall 29a serves as a guide so that the knob 21 is not moved carelessly. This ensures good operability while preventing unauthorized unlocking.

  According to the crime prevention thumb turn according to the first aspect of the present invention, a knob that is movable outward in the rotational radial direction with respect to the thumb turn shaft, and a rotation that abuts the knob moved outward in the rotational radial direction and prevents rotation of the knob. Because it has a restricting member, if you try to hook the knob with the wire inserted indoors or push the knob with the inserted rod, the knob moves outward in the radial direction of rotation and abuts against the rotation restricting member and rotates. Is prevented, making it impossible to input operating force by picking. As a result, it is possible to prevent unauthorized unlocking by rotating the knob, for example, by hooking the inserted wire or bar to the knob, thereby improving the crime prevention.

According to the crime prevention thumb turn of the first aspect of the present invention, the rectangular sliding hole formed in the center of the back of the knob is engaged with the thumb turn shaft end portion having a quadrangular cross section, Since the urging member is disposed between the sliding hole and the knob, the knob cannot be rotated relative to the thumb turn shaft, and can be moved outward in the rotational radial direction. It can be automatically returned to its original position by force. Therefore, transmission of the rotational operation force to the thumb-turn shaft and movement of the knob outward in the rotational radial direction can be realized with a robust and simple structure and with certainty.

According to the crime prevention thumb turn of the second aspect of the present invention, since the inclined surface which gradually decreases the plate thickness toward the outer side in the radial direction of rotation is formed on the surface of the knob, the hooking force by the wire, or Even if the pressing force by the rod is applied in a direction perpendicular to the knob, the inclined surface of the knob generates a component force that moves the knob outward in the rotational radial direction from this force (combined force), and the knob moves outward in the radial direction of rotation. It becomes easy to move. Therefore, when a force in the direction to move the knob is applied, the knob can be moved even when a force in the vertical direction is applied to the knob, and the security against illegal unlocking using wires, bars, etc. Can be further improved.

According to the crime prevention thumb turn of the first aspect of the present invention, the rotation restricting member includes an arc-shaped peripheral wall and a notch portion formed on the peripheral wall and into which the outer end of the knob can enter, and the notch portion. However, it is arranged opposite to the outer end of the knob in the locked position, so that the knob can easily enter the notch at the time of the initial unlocking operation using a wire, a rod, etc. After the rotation is started, the outer end of the knob rotates while being in sliding contact with the inner peripheral surface of the peripheral wall, and this peripheral wall serves as a guide so that the knob is inadvertently not moved radially outward. As a result, good operability can be ensured while preventing unauthorized unlocking.

Hereinafter, preferred embodiments of the security thumb turn according to the present invention will be described with reference to the drawings.
1 is an exploded perspective view of a security thumb turn according to the present invention, FIG. 2 is a front view of the security thumb turn shown in FIG. 1, FIG. 3 is a side view of the security thumb turn shown in FIG. 2, and FIG. It is the front view which notched picking of the security thumb turn.

  A lock box is provided on a door (not shown) to which the security thumb turn 100 according to the present embodiment is attached. The lock box has a latch bolt, a dead bolt, and a lock box mechanism for moving them forward and backward from the door mouth. The dead bolt of the lock box can be moved forward and backward from the mouth by turning the cylinder lock provided on the outdoor side surface of the door with a key or by rotating the thumb turn knob provided on the indoor side surface of the door. ing.

  A conical decorative tube 11 having a flat seat surface 11a is attached to the indoor surface of the door, and a shaft hole 13 is formed in the center of the seat surface 11a. The base end of the thumb turn shaft 15 is inserted into the shaft hole 13, and the inserted base end of the thumb turn shaft 15 is connected to a lock box (not shown). The thumb turn shaft 15 is formed, for example, in a substantially prismatic shape having a square cross section as shown in FIG. An engaging portion 17 is formed at the tip of the thumb turn shaft 15 as an end with an increased height between the upper surface and the lower surface. Therefore, the step portion 19 exists between the engaging portion 17 and the base end side.

  On the other hand, a rectangular sliding hole 23 is formed in the center of the back surface of the knob 21 so as to engage with the engaging portion 17 of the thumb turn shaft 15 so as not to rotate relative to the knob 21 and to move the knob 21 outward in the rotational radius direction. ing. Holding holes 25 and 25 are formed on both side surfaces of the engaging portion 17, and coil springs 27 and 27 as urging members serving as urging means are inserted and held in the holding holes 25 and 25, respectively.

  The other end of the coil spring 27 having one end inserted into the holding hole 25 abuts against the inner surface of the sliding hole 23 as shown in FIGS. That is, the coil springs 27, 27 disposed between the both side surfaces of the engaging portion 17 and the sliding hole 23 return the knob 21 moved outward in the rotational radial direction to the original position, that is, the thumb turn shaft 15. It returns so that it may be located on a central axis.

  A holding plate 28 is screwed to the back surface of the knob 21. The holding plate 28 is provided with a rectangular play hole 31 that is sized so that the proximal end of the thumb turn shaft 15 can pass therethrough and the engaging portion 17 does not pass therethrough. The knob 21 is prevented from coming off from the thumb turn shaft 15 by inserting the engaging portion 17 into the slide hole 23 and fixing the holding plate 28 externally attached to the base end of the thumb turn shaft 15 to the back by screws. In addition, relative rotation with the thumb turn shaft 15 becomes impossible, and the knob 21 can be moved outward in the rotational radius direction.

  In the crime prevention thumb turn 100 having such an engagement structure with the engaging portion 17 and the sliding hole 23, the knob 21 becomes non-rotatable relative to the thumb turn shaft 15, and can move outward in the rotational radius direction. The moved knob 21 is automatically returned to the original position by the biasing force of the pair of coil springs 27 and 27. Accordingly, the transmission of the rotational operation force to the thumb turn shaft 15 and the movement of the knob 21 outward in the rotational radial direction can be reliably realized with a robust and simple structure.

  The knob 21 is rotated in the forward / reverse direction on the seat surface 11a of the decorative tube 11 by connecting the thumb turn shaft 15 to the lock box. On the seat surface 11a of the decorative cylinder 11, a rotation restricting member 29 is provided outside the rotation locus circle of the knob 21. The rotation restricting member 29 is in contact with the knob 21 moved outward in the rotation radius direction. The rotation of the knob 21 is prevented.

  In the present embodiment, the rotation restricting member 29 has an arcuate peripheral wall 29a erected around the rotation locus circle and an outer end portion 21a of the knob 21 formed on the peripheral wall 29a. And a notch 29b. Moreover, the notch 29b is arrange | positioned facing the outer end part 21a of the knob | pick 21 in a locking position, as shown in FIG. Therefore, the notch 29b is provided at two locations corresponding to the left and right outer end portions 21a and 21a of the knob 21.

  In this way, the notch portion 29b is disposed opposite to the outer end portion 21a of the knob 21 in the locking position, so that the knob 21 is notched at the time of the initial unlocking operation using a wire, a rod or the like. It is easy to enter the portion 29b, and after the rotation is started by a regular rotation operation, the outer end portion 21a of the knob 21 is slidable along the inner peripheral surface of the peripheral wall 29a, and the peripheral wall 29a As a guide, the knob 21 is inadvertently not moved outward in the rotational radius direction. This ensures good operability while preventing unauthorized unlocking.

  2 and 3 is formed on the surface of the knob 21, and the inclined surface 33 is formed as an inclined surface that gradually reduces the plate thickness T toward the outer side in the rotational radius direction. In the present embodiment, the inclined surface 33 is an inclined surface having a shape in which the corners at the four corners of the front end surface 21b (see FIG. 2) of the knob 21 are removed. The inclined surface 33 may be a curved surface. Furthermore, the inclined surface 33 may be an elliptic cylinder-shaped outer peripheral surface formed by projecting a wing portion radially outward from the rotation center.

  By providing the inclined surface 33, even if a hooking force by a wire or a pressing force by a rod is applied to the knob 21 in the vertical direction (vertical direction in FIG. 2), the inclined surface 33 of the knob 21 A component force is generated from the force (combined force) to move the knob 21 outward in the rotational radial direction, and the knob 21 is easily moved outward in the rotational radial direction. Accordingly, when a force in the direction in which the knob 21 is moved is applied, the knob 21 can be moved even when a force in the vertical direction is applied to the knob 21, and unauthorized unlocking using a wire, a bar, or the like. The crime prevention property against is further improved.

Next, the operation of the security thumb turn 100 configured as described above will be described.
FIG. 5 is a front view of the security thumb turn in a state where the knob is slid, and FIG. 6 is a plan view of the security thumb turn in which the knob is slid.
The security thumb turn 100 regulates the rotation of the plate-shaped knob 21 projected on the indoor side surface of the door in accordance with the input state of the rotational operation force, thereby unlocking the lock box provided on the door. Operates to disable the input of rotational operating force.

  That is, when the knob 21 is picked with a finger from the front of the door, and the same rotational moment is applied to the knob 21 in the opposite direction with respect to the rotational center axis, the knob 21 is moved outward in the rotational radius direction. First, as shown in FIG. 4, the outer end 21a remains separated from the notch 29b, and the knob 21 can be rotated. After the rotation is started by the regular rotation operation, the outer end portion 21a of the knob 21 rotates so as to be slidable along the inner peripheral surface of the peripheral wall 29a. It will not be moved to the outside in the turning radius direction. Thereby, good operability can be obtained. Normally, the knob 21 in the unlocked state is in a vertical state, and each outer end portion 21a of the knob 21 is located inside the peripheral wall 29a. At the time of the rotation operation from the unlocked state to the locked state, the knob 21 The locking operation can be performed without lowering the operability without moving outward in the rotational radius direction.

  On the other hand, as shown in FIG. 5, the knob 21 in the locked state is improper operating force such as hooking the knob 21 with a wire 35 or pushing the knob 21 with a stick. When an operation force that is not pointed at the same rotational moment in the opposite direction with respect to the axis is applied, the knob 21 is slid outward in the rotational radial direction (the direction of arrow a in FIGS. 5 and 6) against the biasing force of the coil spring 27. The outer end portion 21a of the knob 21 enters the cutout portion 29b of the peripheral wall 29a. Thereby, the knob 21 is prevented from rotating, and the unlocking operation force cannot be input to the lock box.

  When the unauthorized operating force is released, the knob 21 is moved by the urging force of the coil spring 27 so that the outer end 21a is separated from the notch 29b, and is returned to the original position again. We will prepare for the rotation operation.

  Therefore, according to the security thumb turn 100, when the knob 21 is picked from the front with fingers, and when the same rotational moment is applied to the knob 21 with the rotational center axis being symmetrical in the opposite direction, the knob 21 has a turning radius. It does not move outward in the direction and can rotate without interfering with the notch 29 b, and the rotational operation force by the knob 21 is input to the lock box via the thumb turn shaft 15. On the other hand, when the knob 21 is hooked with the wire inserted into the indoor side or the knob 21 is pushed around with the inserted rod, the knob 21 is moved outward in the rotational radial direction and enters the notch 29b to enter the peripheral wall 29a. Rotation is prevented, and operation force input by the knob 21 becomes impossible. As a result, unauthorized unlocking by rotating the knob 21 by hooking the inserted wire, bar or the like on the knob 21 can be prevented, and crime prevention can be improved.

Next, another embodiment of the security thumb turn according to the reference example of the present invention will be described.
FIG. 7 is a schematic perspective view showing another embodiment of the crime prevention thumb turn according to the reference example .
In the security thumb turn 200 according to this embodiment, the knob 41 has a substantially cross shape, and the four outer end portions 41a protrude outward in the rotational radius direction.

  The rotation restricting member 43 includes an arc-shaped peripheral wall 43a erected along the rotation locus circle of the outer end portion 41a, and a cutout portion 43b formed on the peripheral wall 43a and into which the outer end portion 41a of the knob 41 can enter. It consists of. Moreover, the notch part 43b is arrange | positioned facing the outer end part 41a of the knob | pick 41 in a locking position. Accordingly, the same number of four notches 43 b are provided corresponding to the four outer end portions 41 a of the top, bottom, left, and right of the knob 41.

  The thumb turn shaft 45 and the knob 41 are connected by a joint shaft 47 as an urging means made of a shaft member having flexibility in a direction orthogonal to the axis and having a small torsional deformation. Accordingly, the knob 41 is not rotatable relative to the thumb turn shaft 45 and is movable outward in the rotational radius direction.

  According to this crime prevention thumb turn 200, when the same rotational moment is applied to the knob 41 in a point-symmetrical manner with respect to the rotation center axis, the knob 41 does not move outward in the rotational radius direction and does not interfere with the notch 43b. The rotary operation force by the knob 41 is input to the lock box via the thumb turn shaft 45. On the other hand, when the knob 41 is hooked with the wire inserted into the indoor side or the knob 41 is pushed around with the inserted rod, the knob 41 is moved outward in the rotational radial direction, and the outer end 41a is moved to the notch 43b. It enters and comes into contact with the peripheral wall 43a to prevent rotation, and it becomes impossible to input operating force with the knob 41. Thereby, illegal unlocking by rotating the knob 41 by hooking the inserted wire, bar or the like on the knob 41 can be prevented, and crime prevention can be improved.

  In addition, according to the security thumb turn 200, the knob 41 has a substantially cross shape, so that the number of outer end portions 41a is increased to four in comparison with the security thumb turn 100 of the example in which the knob 21 is movable to the left and right. In other words, the above-described crime prevention thumb turn 100 is a one-dimensional movement with respect to the thumb turn axis 15, and the crime prevention thumb turn 200 is a two-dimensional movement with respect to the thumb turn axis 45. On the other hand, the knob 41 can be easily made non-rotatable, and the crime prevention property can be further enhanced.

It is a disassembled perspective view of the security thumb turn which concerns on this invention. It is a front view of the security thumb turn shown in FIG. FIG. 3 is a side view of the security thumb turn shown in FIG. 2. It is the front view which notched the knob | pick of the security thumb turn shown in FIG. It is a front view of the crime prevention thumb turn in the state where the knob is slid. It is a top view of the crime prevention thumb turn of the state where the knob was slid. It is a perspective view showing other embodiment of the crime prevention thumb turn which concerns on the reference example of this invention.

15, 45 ... Thumb turn shaft 17 ... End (engagement part)
21, 41 ... knob 21 a, 41 a ... outer end portion 23 ... sliding hole 27 ... urging means (urging member) (coil spring)
29, 43 ... Rotation restricting member 29a, 43a ... Peripheral wall 29b, 43b ... Notch 33 ... Inclined surface 100, 200 ... Security thumb turn T ... Thickness

Claims (2)

By restricting the rotation of the knob protruded from the indoor side surface of the door according to the input state of the rotation operation force, it is impossible to input the rotation operation force for unlocking the lock box provided on the door. The security thumb turn
A knob connected to a thumb turn shaft for transmitting an operating force to the lock box and movable in the rotational radial direction left and right outer directions with respect to the thumb turn shaft;
A rotation restricting member that is provided outside the rotation locus circle of the knob and prevents the knob from rotating by contacting the knob moved outward in the radial direction of rotation;
A biasing means for returning the knob that is interposed and moved between the thumb turn shaft and the knob;
Equipped with,
At the center of the back surface of the knob, a rectangular slide that engages with the end of the thumb turn shaft having a quadrangular cross section and that is relatively non-rotatable and that is guided by the end and can move in both the left and right outer directions of the rotational radius. A left and right urging member for returning the knob to its original position is disposed between both side surfaces of the thumb turn shaft and the sliding hole.
The rotation restricting member includes an arc-shaped peripheral wall standing around the knob along the rotation locus circle, and left and right cutouts formed on the peripheral wall to allow the left and right outer ends of the knob to enter. And a left and right cutout portion disposed opposite the left and right outer end portions of the knob at the locking position . A security thumb turn according to claim 1 ,
A crime prevention thumb turn characterized in that an inclined surface is formed on the surface of the knob to gradually reduce the thickness toward the outer side in the rotational radius direction.

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