JP2005171750A - Burglar-proof thumbturn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burglarproof thumbturn which can prevent a forcible unlocking of the thumbturn knob done by hooking a wire or the like on the knob, and also can ensure proper operability. <P>SOLUTION: The burglarproof thumb-turn is composed of a core shaft 35 provided in a fixed cylinder 21, a thumb-turn cylinder 43 provided in the fixed cylinder 21, stoppers 49, 51 slidably provided in the thumb-turn cylinder 43, a knob rod 38 with a stopper-escape recess part 38a which rotatively interlocks with the thumb-turn cylinder 43 to make the stoppers 49, 51 enter into a knob 41 mounted on the knob rod 38, a pair of buttons to release an engagement of the stoppers 49, 51, a pair of a release crossing member whose ends are placed in an mutually approaching direction toward sandwiching the stoppers 49, 51, and two pairs of insert-holding plates 73a, 73b, 75a, 75b which hold a protruding plate 39 of the core shaft 35, are opened by a rotation of the core shaft 35 and by this opening motion make the pair of the stoppers 49, 51 slide in an engagement/release direction via the release crossing member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a crime prevention thumb turn that prevents an unauthorized input of an unlocking operation force from being applied to a lock box by restricting rotation of a knob protruded from an indoor surface of a door.

  A lock box is provided at the entrance door provided in an apartment or house, and the lock box has a locking / unlocking mechanism that locks / unlocks the door by engaging / disengaging the dead bolt that has been advanced / retracted from / from the door mouth. Built-in. The lock box is locked and unlocked by inputting a locking / unlocking operation force by a cylinder lock from the outdoor side or a thumb-turning / unlocking operation force by a thumb turn from the indoor side. That is, the operation by the key lock of the cylinder lock is required from the outdoor side, while the lock operation can be easily performed by the rotation operation of only the knob without using the key lock from the indoor side.

  This type of thumb turn has a plate-like knob that protrudes perpendicularly to the indoor surface side of the door, as disclosed in Patent Document 1 below. This knob is connected to the locking / unlocking mechanism of the lock box via the 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 / unlocking mechanism. Can be locked and unlocked.

  However, in recent years, there has been an increase in unauthorized unlocking that unlocks locking devices by inserting a rod or wire from a small hole opened by a post port or a machine tool, locking it to a thumb turn that is easy to rotate, and rotating it. Yes. For example, there is a security cover for thumb turn disclosed in the following Patent Document 2 which prevents the thumb turn from being locked and rotated.

  The security cover is formed with a fitting hole into which the thumb turn is fitted, and a portion covering the outer surface of the thumb turn that draws a circular locus during rotation is formed in a circular shape along the circular locus. Then, a set screw is provided which is screwed into the insertion hole, abuts against the side surface of the thumb turn, and is clamped from both sides. This security cover is fixed to the thumb turn by inserting a thumb turn into the insertion hole, covering the thumb turn so as to cover the security cover, and then screwing and tightening a set screw. Therefore, it becomes difficult to lock and rotate the wire or the like with the security cover placed on the thumb turn.

Moreover, what comprised the security cover from the attachment part and the main-body part is disclosed as another aspect of an above-described security cover. The mounting portion is formed with the outer shape of the above-described crime prevention cover so as to be easily operated by hand, and includes a locking projection that locks the main body portion. The attachment portion can easily rotate the thumb turn in a state where it is put on the thumb turn. Further, the main body portion has a locking portion that can be locked to the locking projection, and the security cover can be attached and detached by a simple operation called a locking operation. Furthermore, since the main body is idled at the locking portion, it has been impossible to lock the wire or the like and rotate it.
Japanese Examined Patent Publication No. 2-15715 (Fig. 1b, Fig. 1c) Japanese Utility Model Publication No. 4-40362

However, since the above-described conventional crime prevention cover has a cylindrical outer shape, a conventional picking operation in which a plate-like pick is sandwiched between fingers cannot be performed, and the operability is lowered.
In addition, when the thumb-turn is covered with a circular security cover, the thumb-turn is not visible due to its rotational position because it is originally an oval shape, and this also makes erroneous operations easy to occur. Thus, there is a problem that the operability of locking and unlocking is lowered.
Furthermore, since it is composed of a mounting portion that allows the thumb turn to rotate, and a main body portion that idles and can be attached to and detached from this mounting portion, storage management of the detached main body becomes complicated, and the main body portion is There was also a risk of loss.

  The present invention has been made in view of the above situation, and it is possible to prevent illegal unlocking of the thumb turn knob that hooks the inserted wire or rod to the knob, and it is possible to ensure good operability, and The purpose is to obtain a security thumb turn that allows the vertical and horizontal postures of the knobs to be seen in the same way as a simple thumb turn.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The security thumb turn 100 according to claim 1 of the present invention includes a fixed cylinder 21 fixed to a door,
A core shaft 35 rotatably provided in the fixed cylinder 21 and connected to the input / output shaft of the lock box;
A thumb turn cylinder 43 rotatably provided in the fixed cylinder 21;
A pair of stoppers 49, 51 are provided in the thumb turn cylinder 43 so as to be slidable in the direction orthogonal to the axis and project from the outer periphery of the thumb turn cylinder 43 and engage with the fixed cylinder 21 to prevent the rotation of the thumb turn cylinder 43. When,
A stopper retracting recess 38a for allowing the stoppers 49 and 51 to move in a direction to release the engagement by allowing the thumb-turn cylinder 43 to rotate while allowing a predetermined play angle α to enter the stoppers 49 and 51. A knob 38 on the outer periphery;
A plate-shaped knob 41 attached to the knob 38 and projecting indoors;
A pair of buttons 63, 65 that have leg portions 63a, 65a and that protrude from the front and back surfaces of the knob 41 and are simultaneously pushed to release the engagement of the stoppers 49, 51 via the leg portions 63a, 65a;
A button urging spring 66 for urging the stoppers 49 and 51 in the engaging direction via the leg portions 63a and 65a by urging the pair of buttons 63 and 65 in the separating direction;
The pair of stoppers 49 and 51 are sandwiched by a gap between one end portions provided in the thumb turn cylinder 43 so as to be slidable in the direction orthogonal to the axis and separated by a compression spring 71, and the other end portions are disposed in the approaching direction. A pair of release cross members 67, 69;
A projecting plate 39 supported swingably on the thumb turn cylinder 43 and projecting from the core shaft 35 is sandwiched from both sides in the direction orthogonal to the axis, and is opened by the projecting plate 39 by the rotational input of the core shaft 35. Two pairs of nippings in which the other ends of the pair of release cross members 67 and 69 are moved away from each other by the leg-opening operation and the pair of stoppers 49 and 51 are slid in the engagement release direction between the one ends. Plates 73a, 73b, 75a, 75b;
It is characterized by comprising.

  In this security thumb turn 100, if the rotational force while pressing the buttons 63 and 65 is not applied to the knob 41, the operation with the knob 41 cannot be performed, and thus the inserted wire or bar is hooked on the knob. Unauthorized unlocking by rotating the knob 41 is prevented. In addition, as with a general thumb turn, the knob 41 can be picked and rotated, and can be locked regardless of the button operation when locked, and the control by the buttons 63 and 65 is automatically performed when the key is locked with a cylinder lock from outside. It is released and the knob 41 is rotated. Further, unlike the configuration in which the conventional security cover is put, the knob 41 is formed in a plate shape, so that the vertical and horizontal postures can be visually recognized. Further, two pairs of sandwiching plates 73a, 73b, 75a, and 75b sandwiching the projecting plate 39 from above and below are a total of two pairs of projecting plates 39 of the core shaft 35 from the left and right sides in the direction perpendicular to the axis, that is, four sandwiching plates. Since it is clamped by 73a, 73b, 75a, 75b, the clamp plates 73a, 73b, 75a, 75b are opened with the same moment in any rotation of the core shaft 35 in the clockwise rotation or counterclockwise rotation. In addition to this, when the knob 41 is turned before the push of the buttons 63 and 65, the stopper retracting recess 38a is displaced from the stoppers 49 and 51, and the stoppers 49 and 51 cannot be retracted to the stopper retracting recess 38a. 49 and 51 cannot be released.

The security thumb turn 300 according to claim 2 includes a fixed cylinder 21 fixed to the door,
A core shaft 35 rotatably provided in the fixed cylinder 21 and connected to the input / output shaft of the lock box;
A thumb turn cylinder 43 rotatably provided in the fixed cylinder 21;
A knob 113 connected to the thumb turn cylinder 43 coaxially and interlockingly,
A plate-shaped knob 117 attached to the knob 113 and projecting indoors;
The thumb turn cylinder 43 is slidably provided in a direction orthogonal to the axis, protrudes from the outer periphery of the thumb turn cylinder 43 and engages with an engagement groove 55 formed in the fixed cylinder 21 in the axial direction. A pair of main stoppers 101 and 103 for preventing rotation of
The thumb turn cylinder 43 is provided in the thumb turn cylinder 43 so as to be slidable in the direction orthogonal to the axis and protrudes from the outer periphery of the thumb turn cylinder 43 by the urging means 109 and 111 to engage with the engagement groove 55 to rotate the thumb turn cylinder 43. The dimension L1 in the groove width direction of the engaging portions 105c and 107c that is blocked and moved into the engagement groove 55 by following the movement of the main stoppers 101 and 103 in the direction of releasing the engagement. A pair of sub stoppers 105, 107 that are larger than the dimension L2 in the groove width direction of the engaging portions 101c, 103c of the main stoppers 101, 103;
A pair of buttons 127 and 129 which have leg portions 63a and 65a, which protrude from the front and back surfaces of the knob 117 and are simultaneously pushed to release the engagement of the main stoppers 101 and 103 via the leg portions 63a and 65a; ,
A button urging spring 66 for urging the main stoppers 101 and 103 in the engaging direction via the legs 63a and 65a by urging the pair of buttons 127 and 129 in the separating direction;
The pair of main stoppers 101 and 103 are sandwiched by a gap between one end portions provided in the thumb turn cylinder 43 so as to be slidable in the direction orthogonal to the axis and separated by a compression spring 71, and the other end portions are disposed in the approaching direction. A pair of release cross members 67, 69 to be
A projecting plate 39 supported swingably on the thumb turn cylinder 43 and projecting from the core shaft 35 is sandwiched from both sides in the direction orthogonal to the axis, and is opened by the projecting plate 39 by the rotational input of the core shaft 35. Two pairs of the other ends of the pair of release cross members 67 and 69 are moved apart in the separating direction by the leg opening operation, and the pair of main stoppers 101 and 103 are slid in the engagement release direction between the one ends. Sandwiching plates 73a, 73b, 75a, 75b;
It is characterized by comprising.

  In this crime prevention thumb turn 300, if the rotational force while pressing the buttons 127 and 129 is not applied to the knob 117, the operation with the knob 117 cannot be performed, so that the inserted wire or rod is hooked on the knob. Unauthorized unlocking by rotating the knob 117 is prevented. In addition, as with a general thumb turn, the knob 117 can be picked and rotated, and can be locked regardless of the button operation when locked, and the buttons 127 and 129 are automatically regulated when the key is locked with a cylinder lock from outside. It is released and the knob 117 is rotated. Further, unlike the configuration in which the conventional crime prevention cover is put, the knob 117 is formed in a plate shape, so that the vertical and horizontal postures can be visually recognized. Further, two pairs of sandwiching plates 73a, 73b, 75a, and 75b sandwiching the projecting plate 39 from above and below are a total of two pairs of projecting plates 39 of the core shaft 35 from the left and right sides in the direction perpendicular to the axis, that is, four sandwiching plates. Since it is clamped by 73a, 73b, 75a, 75b, the clamp plates 73a, 73b, 75a, 75b are opened with the same moment in any rotation of the core shaft 35 in the clockwise rotation or counterclockwise rotation. In addition to this, when a rotational force is applied to the knob 117 while one of the buttons 127 is pushed in, the auxiliary stopper 105 is pressed against the groove edge of the engaging groove 55 and is held away from the engaging groove 55. Although it becomes possible, when a bar or the like is released from one button 127 and the other button 129 is pressed, the dimension L2 in the groove width direction of the engaging portions 101c and 103c of the main stoppers 101 and 103 becomes the sub stoppers 105 and 107. Therefore, only the secondary stopper 105 that is in pressure contact with the groove edge of the engagement groove 55 is held in the disengaged state, and the dimension in the groove width direction is small. The stopper 101 enters the engagement groove 55 again by the button biasing spring 66 without being pressed against the groove edge of the engagement groove 55. As a result, by applying a rotational force while pressing the button, an unauthorized operation for maintaining the disengaged state by the button operation becomes impossible.

  The crime prevention thumb turn 200 according to claim 3 is characterized in that the buttons 63 and 65 protrude from the front and back surfaces of the knob 91 at a position approximately in the center of the knob 91 in the protruding direction toward the indoor side.

  In this crime prevention thumb turn 200, if the optimum holding position of the knob 91 and the button position coincide with each other and the optimum rotation operation position of the knob 91 is held, the buttons 63 and 65 can be pushed in at the same time, thereby improving the operability. It is done.

In the security thumb turn 300 according to claim 4, the knob 117 is rotatably attached to the knob 113.
The buttons 127 and 129 protrude radially outward from the knob 113.
A button through hole 131 for restricting the rotation of the knob 117 relative to the knob ridge 113 by loosely fitting the buttons 127 and 129 protruding from the knob ridge 113 is formed in the knob 117.
The knob 117 is rotated with respect to the knob 113 so that the button through hole 131 and the buttons 127 and 129 are eccentric, so that the button 127, A step portion 133 that prevents the 129 from being pushed in is formed on the buttons 127 and 129.

  In the security thumb turn 300, when the buttons 127 and 129 are rotated first and the buttons 127 and 129 are loosely fitted in the button through holes 131, the button through holes 131 are eccentric with respect to the buttons 127 and 129. 127 and 129 are disposed at positions where the stepped portion 133 is brought into contact with the peripheral edge 131 a of the button through hole 131, and the buttons 127 and 129 cannot be pushed into the button through hole 131.

  The crime prevention thumb turn 400 according to claim 5, wherein the pair of buttons 63, 65 have play lengths Sp 63, Sp 65 in their pushing strokes S 63, S 65, respectively. Convex portions 151 and 153 having substantially the same height as the total of Sp63 and Sp65 are provided on at least one of the mutually opposing surfaces of the pair of buttons 63 and 65, and the pair of buttons 63 and 65 are pushed in, respectively. In this case, both the buttons 63 and 65 are positioned with the convex portions 151 and 153 interposed therebetween.

  In this crime prevention thumb turn 400, the pushing strokes S63, S65 of the buttons 63, 65 have play lengths Sp63, Sp65, and have convex portions 151, 153 that are positioned between the buttons 63, 65. If one of the buttons 63 is pushed in first, interference will occur in the pushing stroke S65 of the other button 65 by the play length Sp63, and thus the other button 65 cannot be pushed in sufficiently. For this reason, in an illegal operation or the like in which one button 63 is pushed in advance and a rotational force is applied to the knob 41 and then the other button 65 is pushed in, the leg of one button 63 is Even if the engagement of the stopper 51 by the portion 63a becomes possible, the other button 65 is insufficiently pushed and the engagement of the stopper 49 by the leg portion 65a is not released. That is, only by pressing the pair of buttons 63 and 65 at the same time, they are pushed in substantially the same stroke, and the respective leg portions 63a and 65a simultaneously release the engagement of the pair of stoppers 49 and 51. Since the knob 41 can be rotated only by this operation, only the operation from the front is accepted with respect to the knob 41, and it becomes more difficult to perform an illegal operation using a wire, a rod, etc. Can be improved.

  According to the crime prevention thumb turn of claim 1 according to the present invention, since the restriction by the button is released and the knob can be rotated, if the rotary force is not applied to the knob while pressing the button, the operation by the knob cannot be performed. As a result, it is possible to prevent unauthorized unlocking by rotating the thumb-turn knob by hooking the inserted wire, bar or the like to the knob, and to improve the crime prevention. In addition, as with a general thumb turn, the knob can be picked and rotated, and can be locked regardless of the button when locked, and the button is automatically released when the key is locked using a cylinder lock from outside. Since it rotates, good operability can be ensured. In addition, unlike the conventional security cover, the shape of the knob is plate-like, so the vertical and horizontal postures can be visually confirmed, and as with a general thumb turn, the locked and unlocked state from the indoor side can be easily confirmed. Can do. In addition, since the core plate protrusion plate is clamped from both sides in the direction perpendicular to the axis by two pairs of clamping plates, the clamping plate can be opened with the same moment in either the clockwise or counterclockwise rotation of the core shaft. This makes it possible to perform a smooth key operation regardless of the left or right side. In addition to this, if the knob is turned before the button is pushed, the stopper retracting recess will be displaced from the stopper, making it impossible to release the stopper, so that the thumb turn, such as hooking the inserted wire or rod, etc. It becomes difficult to rotate the knob and the crime prevention can be further improved.

  According to the crime prevention thumb turn according to claim 2, since the control by the button is released and the knob can be rotated, if the rotary force is not applied to the knob while pressing the button, the operation by the knob cannot be performed. Unauthorized unlocking by rotating the thumb turn knob, for example, by hooking a wire, a bar or the like to the knob, can be prevented, and crime prevention can be improved. In addition, as with a general thumb turn, the knob can be picked and rotated, and can be locked regardless of the button when locked, and the button is automatically released when the key is locked using a cylinder lock from outside. Since it rotates, good operability can be ensured. In addition, unlike the conventional security cover, the shape of the knob is plate-like, so the vertical and horizontal postures can be visually confirmed, and as with a general thumb turn, the locked and unlocked state from the indoor side can be easily confirmed. Can do. In addition, since the core plate protrusion plate is clamped from both sides in the direction perpendicular to the axis by two pairs of clamping plates, the clamping plate can be opened with the same moment in either the clockwise or counterclockwise rotation of the core shaft. This makes it possible to perform a smooth key operation regardless of the left or right side. In addition to this, it has two stoppers, a main stopper and a sub-stopper, so that it can be engaged by pressing the stopper against the groove edge of the engaging groove by applying a rotational force to the knob while one of the buttons is pushed in. Even if it can be held out of the groove, if you try to push the other button away from one button, the dimension in the groove width direction of the engagement part of the main stopper will be the engagement of the sub stopper Therefore, only the secondary stopper that presses against the groove edge of the engagement groove is held in the disengaged state, and the main stopper with a small dimension in the groove width is placed on the groove edge of the engagement groove. There is no pressure contact, and the button urging spring enters the engagement groove again. Thereby, unauthorized unlocking based on the same principle as so-called picking can be prevented, and crime prevention can be further improved.

  According to the crime prevention thumb turn of the third aspect, since the button is protruded from the front and back surfaces of the knob at a position approximately at the center in the protruding direction toward the indoor side of the knob, the optimum holding position of the knob and the button position are the same. In addition, it becomes possible to press the button together with the pinching of the knob, and the operability can be improved.

  According to the crime prevention thumb turn according to claim 4, the knob is rotatably attached to the knob, the button is protruded from the knob, the button through hole is formed in the knob, and the button is inserted into the button through hole. In addition, the button is formed with a step that contacts the periphery of the button through hole, so that the button is rotated first, and the button through hole is eccentric to the button. Then, the stepped portion of the button comes into contact with the peripheral edge of the button through hole, and the push of the button can be prevented. As a result, it becomes more difficult to rotate the thumb turn knob, such as hooking the inserted wire or bar, etc., and the crime prevention can be further improved.

  According to the crime prevention thumb turn according to claim 5, when the push stroke of the pair of buttons has a play length and has a convex portion which is located between the buttons, when one of the buttons is pushed first , Interference with the push stroke of the other button is caused by the play length, and it becomes impossible to push the other button sufficiently. For this reason, in an unauthorized operation such as applying a rotational force to the knob with one of the buttons pressed in advance and then pressing the other button, the stopper of the leg of one button Even if the disengagement is possible, the other button is insufficiently pushed and the stopper is not disengaged by the leg portion. That is, only by pressing a pair of buttons at the same time, the strokes are pushed in substantially the same way, and each leg part simultaneously releases the engagement of the pair of stoppers. Only this operation can rotate the knob. Therefore, only the operation from the front is accepted for the knob, and it becomes more difficult to perform an unauthorized operation using a wire or a rod, and the crime prevention can be improved.

Hereinafter, a preferred embodiment of a security thumb turn according to the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view of a security thumb turn according to the present invention, FIG. 2 is a horizontal sectional view of the security thumb turn according to the present invention, and FIG. 3 is an exploded view of the security thumb turn shown in FIG.

  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 is provided with a latch bolt, a dead bolt, and a lock box mechanism for advancing and retreating the latch bolt and the dead bolt from the door mouth. The dead bolt of the lock box is a cylinder lock provided on the outdoor side of the door with a key or a thumb turn knob (hereinafter simply referred to as “pick”) provided on the indoor side of the door. By moving, it is possible to advance and retreat from the doorhole. The security thumb turn 100 is operated to enable or disable the picking operation by the following configuration.

  A fixed cylinder 21 is fixed to the door or the lock box. A pair of fixing portions 23, 23 project from the outer periphery of the fixing cylinder 21 at one end in the axial direction, and the fixing portions 23, 23 have fixing holes 25. The fixed cylinder 21 is fixed to a lock box provided in the door through the fixing hole 25.

  A spacer ring 26 is extrapolated at the tip of the fixed cylinder 21. A decorative cylinder 29 having a central hole 27 is placed on and fixed to the outer periphery of the spacer ring 26. A conical decorative ring 31 with a flat tip is externally mounted on the outer peripheral side tip of the decorative tube 29. The rear end of the decorative ring 31 is pressed against the indoor surface Ds of the door by the urging force of the spring 33 disposed between the bent portion 31a at the rear end and the rear end surface of the decorative tube 29.

  A core shaft 35 is rotatably provided inside the fixed cylinder 21, and the core shaft 35 has a rear portion connected to an input / output shaft (not shown) from the lock box. The core shaft 35 has a pressing ring 36 sandwiched on the lock box side, and the pressing ring 36 is detached from the fixed cylinder 21 by a fixing ring 37 that is engaged with a circumferential groove 21 a formed on the inner periphery of the fixed cylinder 21. Is prevented. The core shaft 35 has a protruding plate 39 protruding from the tip surface. Therefore, when the input / output shaft (not shown) of the lock box is rotated, the protruding plate 39 is rotated.

  A thumb turn cylinder 43 is rotatably provided inside the rear end side of the fixed cylinder 21. In addition, a knob rod 38 to which a knob 41 is attached is rotatably provided inside the distal end side of the fixed cylinder 21. The knob 38 rotates in conjunction with the thumb turn cylinder 43 while allowing a predetermined play angle. A pair of stopper retracting recesses 38a are formed at both ends in the diameter direction on the outer periphery of the knob rod 38. The stopper retracting recesses 38a allow a stopper to be described later to enter and move in a direction in which the stopper is disengaged.

  The knob 41 is formed in a plate shape whose contour shape is, for example, a semicircular curve as shown in FIG. Thereby, even if it tries to hook the wire to the knob 41 or to push and push it with a rod, the wire and the rod are easily slipped because there is no corner portion, and it is difficult to apply these unauthorized rotational operation forces. In addition, since the corner portion is eliminated, the fit feeling with fingers is also improved.

  The knob 41 is attached to a base member 42 that is fixed to the knob 38 with a fixing screw 40. The mounting can be performed by hooking the claw 41a of the knob 41 to the rear end portion of the base member 42. The knob 41 attached to the knob 38 is plate-shaped and protrudes from the central hole 27 of the decorative cylinder 29 to the indoor side. As a result, the knob 41 can easily grasp the horizontal and vertical directions.

  The rear part of the thumb turn cylinder 43 is a cylindrical part 45, and the cylindrical part 45 is formed with notches 47 (see FIG. 3) that open at both ends in the diameter direction. A pair of shafts 45a and 45a that support a clamping plate, which will be described later, protrude from the rear end surface of the cylindrical portion 45 toward the lock box. A pair of stoppers 49 and 51 that are slidable in the direction orthogonal to the axis of the cylindrical portion 45 are provided inside the cylindrical portion 45. The stopper 49 is formed with a leg engaging portion 49a and a release surface 49b shown in FIG. Further, the stopper 51 is formed with a leg engaging portion 51a and a release surface 51b shown in FIG. Further, the stoppers 49 and 51 are provided with engaging portions 49c and 51c positioned on the radially outer side of the thumb turn cylinder 43, and the engaging portions 49c and 51c can enter the stopper retracting recess 38a. .

  The pair of stoppers 49 and 51 are slid outward in the radial direction of the tubular portion 45 by engaging leg portions provided on a button described later with the leg engaging portions 49a and 51a. It protrudes and engages with an engaging groove 55 formed in the fixed cylinder 21. When the stoppers 49 and 51 are engaged with the engaging grooves 55, the thumb turn cylinder 43 cannot be rotated. Further, the stoppers 49 and 51 are slid inward in the radial direction so that the engaging portions 49c and 51c come out of the engaging groove 55 and enter the stopper retracting recess 38a so that the engagement is released. It has become.

  Recesses 57 are formed on the front and back surfaces of the knob 41. A square button receiving hole 59 is formed in the knob 38 so as to penetrate the front and back surfaces. In the button receiving hole 59, a pair of buttons 63 and 65 which are swingable by the swing shaft 61 are stored. The buttons 63 and 65 protrude in the recesses 57 and 57 on the front and back surfaces of the knob 41. The buttons 63 and 65 have leg portions 63a and 65a that protrude toward the lock box. The leg portions 63a and 65a are engaged with the leg engaging portions 49a and 51a of the stoppers 49 and 51 described above.

  In addition, a button urging spring 66 is inserted between the buttons 63 and 65, and the button urging spring 66 urges the buttons 63 and 65 in the separating direction. The buttons 63 and 65 are arranged in a direction away from each other by a button urging spring 66 so that the leg portions 63a and 65a are arranged horizontally. The pair of stoppers 49 and 51, in which the leg portions 63a and 65a are engaged with the leg engaging portions 49a and 51a, are disposed horizontally as described above, as shown in FIG. Then, it protrudes from the cylindrical portion 45 and engages with the engagement groove 55.

  On the other hand, when the buttons 63 and 65 are pushed in the approaching direction against the urging force of the button urging spring 66, the legs 63a and 65a are opened. As a result, the pair of stoppers 49 and 51 are slid inwardly in the radial direction of the cylindrical portion 45 to operate to release the engagement with the engagement groove 55.

  Inside the fixed cylinder 21, a pair of release intersecting members 67, 69 slidable in the direction orthogonal to the axis of the thumb turn cylinder 43 are provided. As shown in FIG. 3, the release crossing member 67 has a stopper holding piece 67b as one end protruding toward the knob 41 at the upper end of the vertical axis 67a, and protruding toward the lock box side at the lower end of the vertical axis 67a. And a separation piece 67c as the other end. Further, the release crossing member 69 has a stopper holding piece 69b as one end protruding toward the knob 41 at the lower end of the vertical axis 69a and the other end protruding toward the lock box at the upper end of the vertical axis 67a. The separation piece 69c.

  The release cross members 67 and 69 sandwich the pair of stoppers 49 and 51 in the gap between the spaced stopper holding pieces 67b and 69b by the compression spring 71 inserted between the stopper holding pieces 67b and 69b. The spacing pieces 67c and 69c are arranged in the approaching direction. A clamping plate, which will be described later, is disposed between the spacing pieces 67c and 69c.

  Two pairs of sandwiching plates 73a, 73b, 75a, 75b are swingably supported on the shafts 45a, 45a of the thumb turn cylinder 43. The sandwiching plates 73a, 73b, 75a, and 75b sandwich the protruding plate 39 of the core shaft 35 from both sides in the direction orthogonal to the axis. For example, the clamping plates 73a and 73b are from the right side, and the clamping plates 75a and 75b are from the left side. The clamping plates 73a, 73b, 75a, and 75b that sandwich the protruding plate 39 are opened by the protruding plate 39 when the cylinder lock is rotated by the key and the core shaft 35 is rotated accordingly. The sandwiching plates 73a, 73b, 75a, 75b move the separating pieces 67c, 69c, which are the other end portions of the pair of release cross members 67, 69, in the separating direction by the opening operation, and at one end portions. A pair of stoppers 49 and 51 are slid in the disengagement direction between the stopper holding pieces 67b and 69b.

Next, the operation of the security thumb turn 100 having the above configuration will be described.
4 is an operation explanatory view showing the locked state in the AA cross section of FIG. 1 as (a) and the cylinder lock rotating state in (b), and FIG. 5 is the locked state in the BB cross section of FIG. FIG. 6 is an operation explanatory view showing the rotation state of the cylinder lock as shown in FIG. 6B, FIG. 6 is an operation explanatory view showing the lock state in the BB cross section of FIG. These are operation | movement explanatory drawings showing the locked state in the CC cross section of FIG. 1 at (a), and the state which rotated the knob | pick without pushing the button in (b).

In the security thumb turn 100, in the locked state, the knob 41 is positioned in the horizontal direction, and the stoppers 49 and 51 provided in the thumb turn cylinder 43 protrude from the notch 47 by the urging force of the button urging spring 66, and FIG. As shown in FIG. 6A, the engaging groove 55 is engaged.
To release the locked state of the security thumb turn 100, the front and back buttons 63 and 65 protruding from the knob 41 are pressed.
When the buttons 63 and 65 are pushed in, the legs 63a and 65a are opened from a state in which the legs 63a and 65a are aligned horizontally. As a result, as shown in FIG. 6B, the pair of stoppers 49 and 51 are slid inward in the radial direction of the cylindrical portion 45, and are removed from the engagement groove 55.

  As a result, the engagement between the stoppers 49 and 51 and the engagement groove 55 is released, the thumb turn cylinder 43 can be rotated, and the knob 41 is rotated in the vertical direction. At this time, since the engaging groove 55 is not formed on the inner periphery of the fixed cylinder 21 as shown in FIG. 2 at the vertical position of the knob 41, the stoppers 49 and 51 remain in the cylindrical portion 45. It becomes. Accordingly, the buttons 63 and 65 are held in a pressed state.

  On the other hand, in order to change from the unlocked state to the locked state, it is only necessary to rotate the knob 41 until it is in a horizontal state regardless of the operation of the buttons 63 and 65. That is, if the knob 41 is rotated from the vertical state to the horizontal state, the rotational force is transmitted to the core shaft 35 via the thumb turn cylinder 43, the release cross members 67 and 69, and the clamping plates 73a, 73b, 75a, and 75b. At the same time, the stoppers 49 and 51 are aligned with the engagement groove 55 and enter the engagement groove 55 by the urging force of the button urging spring 66, and the state shown in FIGS. 5 (a) and 6 (a) is obtained again. The buttons 63 and 65 protrude to complete the locking.

  Further, in the locked state, when the cylinder lock is operated with the key from the outdoor side, the input / output shaft of the lock box rotates, and the core shaft 35 is rotated in conjunction with the rotation. When the core shaft 35 is rotated, the protruding plate 39 is tilted, whereby the sandwiching plates 73a, 73b, 75a, and 75b are opened as shown in FIGS. 4 (a) to 4 (b). When the clamping plates 73a, 73b, 75a, 75b are opened, the separation pieces 67c, 69c of the release cross members 67, 69 are opened. As a result, the stopper holding pieces 67b, 69b of the release cross members 67, 69 are shown in FIG. As shown in FIG. 5B, the pair of stoppers 49 and 51 are sandwiched in the direction to be sandwiched, and the stoppers 49 and 51 are moved in a direction to be removed from the engagement groove 55.

  Thereby, even in the locked state, the restriction of the stoppers 49 and 51 is released by the operation of the cylinder lock, and the knob 41 is rotated.

  Further, when the knob 41 is rotated before the push of the buttons 63 and 65 by, for example, an inserted wire or bar, the stopper retracting recess 38a is changed from the state shown in FIG. 7A to FIG. 7B. In this state, the stoppers 49 and 51 are displaced from each other, the stoppers 49 and 51 cannot be retracted into the stopper retracting recess 38a, and the stoppers 49 and 51 cannot be released. In this case, the buttons 63 and 65 cannot be pushed in by the stoppers 49 and 51 that have become non-slidable.

  Here, during normal operation, the position of the knob 41 is preferably held horizontally so that the stoppers 49 and 51 can enter the stopper retracting recess 38a so that the buttons 63 and 65 can be easily pushed. Such a horizontal holding mechanism can be realized by providing a click mechanism on the thumb turn cylinder 43 and the knob 38. That is, as shown in FIG. 7, the thumb turn cylinder 43 and the knob 38 are relatively rotatable with a predetermined play angle α. The play angle α can be set by a gap 85 formed by the interference portions 81 and 83 between the thumb turn cylinder 43 and the knob 38. A click ball 89 urged radially outward by the urging spring 87 is provided in the interference portion 81 on the thumb turn cylinder 43 side, and a concave groove 91 with which the click ball 89 comes into contact with the interference portion 83 on the knob rod 38 side is provided. Form. Accordingly, the knob 41 is held horizontally, and the stoppers 49 and 51 can enter the stopper retracting recess 38a, so that the buttons 63 and 65 can be easily pushed in during normal operation.

  In the unlocked state, when the locked state is set via the cylinder lock from the outdoor side, the stoppers 49 and 51 are not in the engaged state, so that a normal locking operation is performed. Further, after the sandwiching plates 73a, 73b, 75a, and 75b are opened by the inclined projection plate 39, they are rotated together with the thumb turn cylinder 43.

  According to the crime prevention thumb turn 100, unless the rotational force while pressing the buttons 63 and 65 is applied to the knob 41, in particular, when the pair of buttons 63 and 65 are respectively pressed and not rotated. The unlocking operation by the knob 41 cannot be performed, and thereby, the unauthorized unlocking by rotating the knob 41 by, for example, hooking the inserted wire or bar to the knob is prevented. In addition, as with a general thumb turn, the knob 41 can be picked and rotated, and can be locked regardless of the button operation when locking, and the stoppers 49 and 51 are automatically released when the key is locked using a cylinder lock from outside. Since the knob 41 is rotated, good operability is ensured. Furthermore, unlike the conventional configuration in which the security cover is put on, the vertical / horizontal posture of the knob 41 can be visually recognized, so that the locking / unlocking state from the indoor side can be easily confirmed as in the case of a general thumb turn. .

  Further, according to the security thumb turn 100, the projection plate 39 of the core shaft 35 is clamped from both sides in the direction orthogonal to the axis by the two pairs of clamping plates 73a, 73b, 75a, 75b. The clamping plate 39 can be opened with the same moment in any rotation, and a smooth key operation can be performed regardless of the left and right of the cylinder lock.

  Furthermore, according to the security thumb turn 100, when the knob 41 is turned before the push of the buttons 63 and 65, the stopper retracting recess 38a is displaced from the stoppers 49 and 51, and the stoppers 49 and 51 cannot be released. As a result, the thumb-turn knob 41 is more difficult to rotate by hooking the inserted wire, rod or the like to the knob, and the crime prevention can be further improved.

  In the above-described embodiment, the example in which the knob 41 is formed in a substantially plate shape has been described. However, the present invention is not limited to this, and a shape in which an intermediate part is an bulging shape may be used. Alternatively, the shape may be a cone shape or a prism shape.

Next, a modification of the above embodiment will be described.
FIG. 8 is a longitudinal sectional view of a modified example in which the button is arranged at the center of the knob, and FIG. 9 is a horizontal sectional view of the modified example in which the button is arranged at the center of the knob. In addition, the same code | symbol is attached | subjected to the member equivalent to the member shown in FIGS. 1-7, and the overlapping description shall be abbreviate | omitted.
In this security thumb turn 200, the buttons 63 and 65 are projected from the front and back surfaces of the knob 91 at a substantially central position in the protruding direction of the knob 91 toward the indoor side. The knob 91 is screwed to the knob 38 with a knob fixing screw 93 in the axial direction of the thumb turn cylinder 43. The fixing screw 93 is accommodated in a recess 91 a that is recessed in the end face of the knob 91. A screw cover 95 is attached to the recess 91a in a locked state. The screw cover 95 is formed in a rectangular shape and is colored in a color different from that of the knob 91. The screw cover 95 may be colored by applying a resin kneaded with a phosphorescent agent or a fluorescent paint. As a result, the knob fixing screw 93 is hidden by the screw cover 95 and is not exposed. In addition, since the rectangular screw cover 95 has a color different from that of the knob 91, a mark effect that makes it easy to grasp the horizontal and vertical directions of the knob 91 is produced.

  According to the crime prevention thumb turn 200, if the optimum pinching position of the knob 91 and the button position coincide with each other and the optimum rotation operation position of the knob 91 is pinched, the buttons 63 and 65 can be pushed in at the same time. Can be increased.

Next, another embodiment of the security thumb turn according to the present invention will be described.
10 is a longitudinal sectional view of a security thumb turn according to another embodiment, FIG. 11 is a horizontal sectional view of a security thumb turn according to another embodiment, and FIG. 12 is a view along arrows DD in FIG. FIG. 13 is an exploded perspective view of the security thumb turn shown in FIG. 10, and FIG. 14 is a cross-sectional view taken along line FF in FIG. It is explanatory drawing represented to). In addition, the same code | symbol is attached | subjected to the member equivalent to the member shown in FIGS. 1-9, and the overlapping description shall be abbreviate | omitted.

  The security thumb turn 300 according to the present embodiment is different from the security thumb turn 100 in the stopper mechanism. That is, the security thumb turn 300 includes a pair of main stoppers 101 and 103 and a pair of sub stoppers 105 and 107. The main stoppers 101 and 103 are provided in the thumb turn cylinder 43 so as to be slidable in the direction orthogonal to the axis, and project from the outer periphery of the thumb turn cylinder 43 to engage with an axial engagement groove 55 formed in the fixed cylinder 21. Thus, the rotation of the thumb turn cylinder 43 is prevented.

  The sub stoppers 105 and 107 are provided in the thumb turn cylinder 43 so as to be slidable in the direction orthogonal to the axis, and project from the outer periphery of the thumb turn cylinder 43 by the biasing means 109 and 111 such as coil springs and engage with the engagement groove 55. Thus, the rotation of the thumb turn cylinder 43 is prevented. The urging means 109 is disposed on the seating surface 105a of the sub stopper 105 and the inner peripheral upper surface of the cylinder portion 115 of the knob 113, and urges the sub stopper 105 downward in the figure. The urging means 111 is disposed on the seating surface 107a of the sub stopper 107 and the inner peripheral lower surface of the cylindrical portion 115 of the knob 113, and urges the sub stopper 107 upward in the figure.

  The sub stoppers 105 and 107 are disengaged following the movement in the direction in which the main stoppers 101 and 103 are disengaged. That is, as shown in FIG. 10, in the case of the sub stopper 107, for example, the lateral piece 107b is pressed by the corner 103b of the main stopper 103 and is driven in the disengagement direction, that is, radially inward of the thumb turn cylinder 43. . Further, in the sub stoppers 105 and 107, the dimension L1 in the groove width direction of the engaging portions 105c and 107c entering the engaging groove 55 is the dimension L2 in the groove width direction of the engaging portions 101c and 103c of the main stoppers 101 and 103. It is formed larger.

  The knob 113 is projected from the front end surface of the decorative ring 31 to the indoor side. The knob 117 is configured such that the cylindrical portion 121 is extrapolated to the collar 119 of the knob 113 that protrudes indoors. A knob 117 obtained by extrapolating the cylindrical part 121 to the collar part 119 is configured such that the front end surface of the knob plate 123 is fixed to the tip of the collar part 119 by a fixing screw 125. By setting it as such an assembly structure, the favorable assembly property of the knob | pick 117 is ensured.

  As shown in FIG. 14 (b), the buttons 127 and 129 have a surface area that is pressed with a wire, a bar, or the like by making the exposed portions have a mountain-shaped cross section. Further, the cylindrical portion 121 has an elliptical cross-sectional shape so that it cannot be hooked or pushed by a wire or a rod.

  The knob 117 is attached to the collar 119 so as to be rotatable. The buttons 127 and 129 protrude from the flange portion 119 outward in the radial direction. The knob 117 is provided with a button through hole 131, and the button through hole 131 loosely fits the buttons 127 and 129 protruding from the collar part 119, thereby restricting the rotation of the knob 117 with respect to the collar part 119. . And the step part 133 is formed in the neck part of the bulging front-end | tip head at the front-end | tip of button 127,129. When the knob 117 is rotated with respect to the flange portion 119 so that the button through hole 131 and the buttons 127 and 129 are eccentric, the stepped portion 133 contacts the peripheral edge 131a of the button through hole 131 and the button 127 , 129 to prevent the push-in.

  As shown in FIG. 14A, a gap 135 is formed between the inner periphery of the knob 117 and the collar part 119, so that the knob 117 can rotate with respect to the collar part 119 at a play angle α. ing. When the knob 117 is rotated to the play angle α, the stepped portion 133 prevents the buttons 127 and 129 from being pushed. For this reason, it is preferable that the knob 117 is held horizontally so that the buttons 127 and 129 can be easily pushed during normal operation. Such a horizontal holding mechanism can be realized by providing a click mechanism on the collar part 119 and the cylinder part 121. That is, as shown in FIG. 14A, a click pin 139 that is biased outward by a biasing spring 137 is provided in the collar portion 119, and a V-groove with which the click pin 139 abuts on the inner periphery of the cylindrical portion 121. 141 is formed. As a result, the knob 117 is held horizontally, and the stepped portion 133 of the buttons 127 and 129 does not come into contact with the peripheral edge 131a of the button through hole 131, so that the buttons 127 and 129 can be easily pushed in during normal operation.

Next, the operation of the security thumb turn 300 having the above configuration will be described.
FIG. 15 is an operation explanatory view showing a state where a pair of buttons are pushed in a locked state, FIG. 16 is an operation explanatory view showing a state in which only one button is pushed and an illegal rotational force is applied to the knob at the same time, FIG. FIG. 9 is an operation explanatory diagram in a state where pressing to one button is released while an unauthorized rotation is applied.

To release the locked state of the security thumb turn 300, the buttons 127 and 129 on the front and back surfaces protruding from the knob 117 are pressed as shown in FIG.
When the buttons 127 and 129 are pushed in, the legs 63a and 65a are opened from a state where the legs 63a and 65a are horizontally aligned. As a result, the pair of main stoppers 101 and 103 are slid inward in the radial direction of the thumb turn cylinder 43, and the sub stoppers 105 and 107 are also slid along with the sliding, so that the main stoppers 101 and 103 and the sub stoppers 105 and 107 are also slid. Both are removed from the engaging groove 55.

  As a result, the engagement between the main stoppers 101 and 103 and the sub stoppers 105 and 107 and the engaging groove 55 is released, the thumb turn cylinder 43 and the knob ridge 113 can be rotated, and the knob 117 is rotated in the vertical direction. Is done. At this time, since the engagement groove 55 is not formed on the inner periphery of the fixed cylinder 21 as shown in FIG. 11 at the vertical position of the knob 117, the main stoppers 101 and 103 and the sub stoppers 105 and 107 are formed in the cylindrical portion 45. It will be in a state of retreating in. Accordingly, the buttons 127 and 129 are held in the pressed state.

  On the other hand, in order to change from the unlocked state to the locked state, it is only necessary to rotate the knob 117 until it is in a horizontal state regardless of the operation of the buttons 127 and 129. That is, if the knob 117 is rotated from the vertical state to the horizontal state, the rotational force is transmitted to the core shaft 35 through the thumb turn cylinder 43, the release cross members 67 and 69, and the clamping plates 73a, 73b, 75a, and 75b. At the same time, the main stoppers 101 and 103 and the sub stoppers 105 and 107 are aligned with the engaging groove 55, and enter the engaging groove 55 by the urging force of the button urging spring 66, and the buttons 127 and 129 protrude again to lock. Complete.

  Further, in the locked state, when the cylinder lock is operated with the key from the outdoor side, the input / output shaft of the lock box rotates, and the core shaft 35 is rotated in conjunction with the rotation. When the core shaft 35 is rotated, the projecting plate 39 is tilted, whereby the sandwiching plates 73a, 73b, 75a, and 75b are opened. When the clamping plates 73a, 73b, 75a, 75b are opened, the separation pieces 67c, 69c of the release cross members 67, 69 are opened. As a result, the stopper holding pieces 67b, 69b of the release cross members 67, 69 are mainly used. The main stoppers 101 and 103 are moved in the direction in which the stoppers 101 and 103 are sandwiched in the direction in which the stoppers 101 and 103 are sandwiched and removed from the engagement groove 55. Further, the sub stoppers 105 and 107 are also moved in the removal direction following the movement of the main stoppers 101 and 103.

  Accordingly, even in the locked state, the restriction of the main stoppers 101 and 103 and the sub stoppers 105 and 107 is released by the operation of the cylinder lock, and the knob 117 is rotated.

  Furthermore, when the knob 117 is turned before the buttons 127 and 129 are pushed by, for example, an inserted wire or a bar, the knob 117 is rotated by a play angle α with respect to the collar 119. As a result, the stepped portions 133 of the buttons 127 and 129 come into contact with the peripheral edge 131a of the button through-hole 131 and are prevented from being pushed in.

  In addition, as shown in FIG. 16, when a rotational force is applied to the knob 117 while one button 127 is pushed in, the sub stopper 105 is pressed against the groove edge of the engagement groove 55 and the like from the engagement groove 55. Although it can be held in a disengaged state, when a bar or the like is released from one button 127 and the other button 129 is pressed, the dimension L2 of the engaging portion of the main stopper 101 in the groove width direction is the engagement of the sub stopper 105. Since it is smaller than the dimension L2 in the groove width direction of the joint, as shown in FIG. 17, only the sub stopper 105 that presses against the groove edge of the engagement groove 55 is held in the disengaged state, and the dimension in the groove width direction is The small main stopper 101 enters the engagement groove 55 again by the button biasing spring 66 without being pressed against the groove edge of the engagement groove 55. As a result, by applying a rotational force while pressing the button 129, an unauthorized operation for maintaining the disengaged state by the button operation is disabled.

  According to the security thumb turn 300, if the rotational force while pressing the buttons 127 and 129 is not applied to the knob 117, in particular, when the pair of buttons 127 and 129 are pressed and not rotated, Unlocking operation by the knob 117 cannot be performed, thereby preventing unauthorized unlocking by rotating the knob 117 by hooking the inserted wire or bar to the knob. In addition, as with a general thumb turn, the knob 117 can be picked and rotated, and can be locked regardless of the button operation when locking, and the main stoppers 101 and 103 and the sub stoppers can be locked when operating a lock with a cylinder lock from the outside. Since 105 and 107 are automatically released and the knob 117 is rotated, good operability is ensured. Furthermore, unlike the conventional configuration in which the security cover is put on, the vertical and horizontal postures of the knob 117 can be visually recognized, so that the locking / unlocking state from the indoor side can be easily confirmed as in the case of a general thumb turn. .

  Further, according to this security thumb turn 300, the projection plate 39 of the core shaft 35 is clamped from both sides in the direction orthogonal to the axis by the two pairs of clamping plates 73a, 73b, 75a, 75b. The clamping plate 39 can be opened with the same moment in any rotation, and a smooth key operation can be performed regardless of the left and right of the cylinder lock.

  Further, since the two stoppers of the main stoppers 101 and 103 and the sub stoppers 105 and 107 are provided, the stopper is attached to the groove edge of the engaging groove 55 by applying a rotational force to the knob 117 with one button 127 pushed in. Even if it can be held in a state in which it is pressed against the engagement groove 55 and released from the engagement groove 55, the engagement of the main stoppers 101, 103 will occur if the other button 129 is pressed away from one button 127. Since the dimension L2 in the groove width direction of the portions 101c, 103c is smaller than the dimension L1 in the groove width direction of the engaging portions 105c, 107c of the sub stoppers 105, 107, the sub stopper 105, which presses against the groove edge of the engaging groove 55, Only 107 is held in the disengaged state, and the main stoppers 101 and 103 having a small dimension in the groove width direction do not come into pressure contact with the groove edge of the engagement groove 55, And thus to enter the engaging groove 55 again by the end biasing spring 66. Thereby, unauthorized unlocking based on the same principle as so-called picking can be prevented, and crime prevention can be further improved.

Next, still another embodiment of the security thumb turn according to the present invention will be described.
FIG. 18 is a longitudinal sectional view of a security thumb turn according to another embodiment. In other embodiments, the security thumb turn 100 of the above-described embodiment is a basic structure, and members equivalent to those shown in FIGS. Shall be omitted.

  The security thumb turn 400 according to this embodiment is different from the security thumb turn 100 in the pair of buttons. That is, the security thumb turn 400 is configured such that the push strokes S63 and S65 of the pair of buttons 63 and 65 have play lengths Sp63 and Sp65, and the protrusions 151 and 153 positioned between the buttons 63 and 65 are provided. It is set as the structure provided.

The pair of buttons 63 and 65 are provided with convex portions 151 and 153 on surfaces facing each other. In this embodiment, as shown in FIG. 18, these convex portions 151 and 153 are formed in a substantially spherical shape, and both are formed to have the same protruding height. And these convex parts 151 and 153 will mutually contact | abut, when both buttons 63 and 65 are each pushed in (refer FIG. 19). The buttons 63 and 65 are swingable about the swing shaft 61. The pushing strokes S63 and S65, which are the swing lengths of the buttons 63 and 65, are the release strokes Sc63 and Sc65 and the play lengths Sp63 and Sp65. Total. When the buttons 63 and 65 are simultaneously swung and pushed by the same distance, they are swung only by the release strokes Sc63 and Sc65, and the convex portions 151 and 153 of the buttons 63 and 65 are in contact with each other, and the respective leg portions. The legs 63a and 65a are opened as shown in FIG. As a result, the stoppers 49 and 51 are slid inwardly in the radial direction of the cylindrical portion 45 and are removed from the engaging groove 55, so that the thumb turn cylinder 43 can be rotated.
In this embodiment, the convex portions 151 and 153 are formed on each of the buttons 63 and 65, that is, the convex portions 151 and 153 are divided into two parts, and the heights of the convex portions 151 and 153 are the respective buttons 63, 65. It is equivalent to 65 play lengths Sp63, Sp65.

  The push-in strokes S63 and S65 of these buttons 63 and 65 are, as shown in the schematic explanatory diagram of FIG. 21, for example, with one button 63, the stopper 51 is disengaged as shown in FIG. The swing distance to the center line CL passing through the center of the swing shaft 61 as the position is the release stroke Sc63, and the swing distance exceeding this is the play length Sp63. Similarly, for the button 65, as shown in FIG. 21B, Sc65 is the release stroke, and Sp65 is the play length. Here, when one button 63 is pushed in advance, the one button 63 is swung by the length of the pushing stroke S63 beyond the release stroke Sc63 (see FIG. 21A). The button 65 enters the release stroke Sc65 range. That is, the convex portion 151 of one button 63 is positioned on the other button 65 side beyond the center line CL. In this state, one of the stoppers 51 is slid inward in the radial direction of the cylindrical portion 45, and is brought out of the engagement groove 55. Thereafter, when the other button 65 is pushed in, the convex portion 153 of the other button 65 comes into contact with the convex portion 151 of one button 63 without sufficiently moving. Therefore, the release stroke Sc65 of the other button 65 is returned by the sum of the play lengths Sp63 and Sp65 of both buttons 63 and 65 (Sr65 in FIG. 21B). As a result, the other stopper 49 does not slide sufficiently inward in the radial direction of the cylindrical portion 45 and is not removed from the engagement groove 55. That is, as shown in FIG. 21 (b), the other button 65 is pushed back by an angle R from the center line CL, and as shown in FIG. Compared with the case where the buttons 63 and 65 are simultaneously pushed in by the same length by the angle β returned from the center line CL where the convex portions 151 and 153 come into contact, the position (angle) is swayed. As described above, one of the stoppers 51 is released by the respective leg portions 63a and 65a of the buttons 63 and 65, but the other stopper 49 is not released. Therefore, the knob 41 can be rotated. It becomes impossible.

  Therefore, according to the security thumb turn 400, the push strokes S63, S65 of the buttons 63, 65 have play lengths Sp63, Sp65, and the protrusions 151, 153 that are positioned between the buttons 63, 65 are provided. Therefore, if one button 63 is pushed in first, the push stroke S65 of the other button 65 will interfere with the play length Sp63, which makes it impossible to push the other button 65 sufficiently. Become. For this reason, in an illegal operation in which one button 63 is pressed in advance and a rotational force is applied to the knob 41 and then the other button 65 is pressed, the leg portion of the one button 63 is pressed. Even if the stopper 51 can be disengaged by 63a, the other button 65 is insufficiently pushed, and the engagement of the stopper 49 by the leg portion 65a is not released. That is, only by pressing the pair of buttons 63 and 65 at the same time, they are pushed in substantially the same stroke, and the respective leg portions 63a and 65a simultaneously release the engagement of the pair of stoppers 49 and 51. Since the knob 41 can be rotated only by this operation, only a balanced operation to the buttons 63 and 65 by the finger from the front is accepted with respect to the knob 41, and a wire, a bar, or the like is used. It is more difficult to perform unauthorized operations, and crime prevention can be improved.

  In the above-described convex portions 151 and 153, the two-divided structure has been described so as to be formed on each of the buttons 63 and 65. However, the configuration may be provided on any one of the buttons, that is, either button. For example, a substantially spherical convex portion may be provided on the opposite surface. The height of the convex portion in this case may be set to a height substantially equivalent to the sum of the play lengths Sp63 and Sp65 of both buttons 63 and 65 (corresponding to R in FIG. 21B).

  The security thumb turn 200 shown in FIG. 8 and FIG. 9 raised as a modification and the security thumb turn 300 shown in FIG. 10 to FIG. 14 described as other embodiments also have the above-described configuration of the buttons 63 and 65. By adopting a configuration in which the push strokes S63 and S65 have play lengths Sp63 and Sp65 and convex portions 151 and 153 positioned between the buttons 63 and 65, the same effect as described above can be obtained. Crime prevention will be further improved.

It is a longitudinal cross-sectional view of the crime prevention thumb turn which concerns on this invention. It is a horizontal sectional view of a security thumb turn according to the present invention. FIG. 2 is an exploded view of the security thumb turn shown in FIG. 1. It is operation | movement explanatory drawing which represented the locked state in the AA cross section of FIG. 1 to (a), and represented the cylinder lock rotation state to (b). It is operation | movement explanatory drawing which represented the locked state in the BB cross section of FIG. 1 to (a), and represented the cylinder lock rotation state to (b). It is operation | movement explanatory drawing which represented the locked state in the BB cross section of FIG. 1 to (a), and represented the button pushing state in (b). It is operation | movement explanatory drawing which represented the locked state in the CC cross section of FIG. 1 at (a), and the state which rotated the knob | pick without pushing a button in (b). It is the longitudinal cross-sectional view of the modification which has arrange | positioned the button in the center part. It is a horizontal sectional view of the modification which has arranged the button in the center part. It is a longitudinal cross-sectional view of the crime prevention thumb turn by other embodiment. It is a horizontal sectional view of a security thumb turn according to another embodiment. It is explanatory drawing which represented the DD arrow view of FIG. 10 to (a), and represented the EE arrow arrow to (b). It is a disassembled perspective view of the crime prevention thumb turn shown in FIG. It is explanatory drawing which represented the FF cross section of FIG. 11 to (a) and the GG cross section to (b). It is operation | movement explanatory drawing showing the state by which a pair of button was pushed in the locked state. It is operation | movement explanatory drawing in the state where only one button was pushed in and the unauthorized rotational force was added to the knob simultaneously. It is operation | movement explanatory drawing of the state by which the press to one button was cancelled | released with improper rotation added. It is a longitudinal cross-sectional view of the crime prevention thumb turn by other embodiment. It is operation | movement explanatory drawing showing the state by which a pair of button was pushed in the locked state. It is operation | movement explanatory drawing in the state where only one button was pushed. It is explanatory drawing which showed the operation | movement schematic diagram of one button in (a), and the operation | movement schematic diagram of the other button in (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 ... Fixed cylinder 35 ... Core shaft 38 ... Knob 38a ... Stopper recessed part 39 ... Projection board 41, 91, 117 ... Knob 43 ... Thumb turn cylinder 49, 51 ... Stopper 55 ... Engaging groove 63, 65, 127, 129 ... Button 63a, 65a ... Leg part 66 ... Button biasing spring 67, 69 ... Release cross member 67b, 69b ... One end (stopper clamping piece)
67c, 69c ... the other end (spaced piece)
71 ... compression springs 73a, 73b, 75a, 75b ... clamping plates 100, 200, 300, 400 ... crime prevention thumb turns 101, 103 ... main stoppers 105, 107 ... sub stoppers 109, 111 ... biasing means 113 ... knobs 101c, 103c 105c, 107c ... engaging portion 131 ... button through hole 131a ... peripheral edge of button through hole 133 ... stepped portion 151, 153 ... convex portion L1, L2 ... dimension in groove width direction S63, S65 ... push-in stroke Sp63, Sp65 ... play Length α ... play angle

Claims (5)

A fixed cylinder fixed to the door;
A core shaft rotatably provided in the fixed cylinder and connected to the input / output shaft of the lock box;
A thumb-turn cylinder rotatably installed in the fixed cylinder;
A pair of stoppers provided in the thumb turn cylinder so as to be slidable in the direction perpendicular to the axis and protruding from the outer periphery of the thumb turn cylinder to engage the fixed cylinder, thereby preventing rotation of the thumb turn cylinder;
A knob having a stopper retracting recess on the outer periphery that allows the stopper to move in a direction to release the engagement by allowing the thumb turn cylinder to rotate while allowing a predetermined play angle.
A plate-shaped knob attached to the knob and protruding indoors;
A pair of buttons that have leg portions and that are projected onto the front and back surfaces of the knob and simultaneously pushed to release the engagement of the stopper via the leg portions;
A button urging spring that urges the stopper in the engaging direction via the legs by urging the pair of buttons in the separating direction;
A pair of release intersections in which the pair of stoppers are sandwiched by a gap between one end portions provided in the thumb turn cylinder so as to be slidable in a direction orthogonal to the axis and separated by a compression spring, and the other end portions are disposed in the approaching direction. Members,
A projecting plate supported swingably on the thumb turn cylinder and projecting from the core shaft is sandwiched from both sides in the direction orthogonal to the axis, and is opened by the projecting plate by the rotation input of the core shaft, Two pairs of sandwiching plates that move the other ends of the pair of release cross members in the separating direction and slide the pair of stoppers in the engagement release direction between the one ends; and
Crime prevention thumb turn characterized by comprising. A fixed cylinder fixed to the door;
A core shaft rotatably provided in the fixed cylinder and connected to the input / output shaft of the lock box;
A thumb-turn cylinder rotatably installed in the fixed cylinder;
A knob that is connected to the thumb-turn cylinder coaxially and interlocked,
A plate-shaped knob attached to the knob and protruding indoors;
The thumb turn cylinder is slidably provided in a direction orthogonal to the axis, protrudes from the outer periphery of the thumb turn cylinder, and engages with an axial engagement groove formed in the fixed cylinder to prevent the rotation of the thumb turn cylinder. A pair of main stoppers;
The thumb turn cylinder is slidably mounted in the direction orthogonal to the axis and is projected from the outer periphery of the thumb turn cylinder by the urging means to engage with the engagement groove, thereby preventing the rotation of the thumb turn cylinder and the main stopper. The dimension in the groove width direction of the engaging portion that is released from the engagement following the movement in the direction for releasing the engagement and enters the engaging groove is larger than the dimension in the groove width direction of the engaging portion of the main stopper. A large pair of secondary stoppers;
A pair of buttons that have leg portions and that are projected onto the front and back surfaces of the knob and simultaneously pushed to release the engagement of the main stopper via the leg portions;
A button urging spring that urges the main stopper in the engaging direction via the legs by urging the pair of buttons in the separating direction;
A pair of release devices in which the pair of main stoppers are sandwiched by a gap between one end portions provided in the thumb turn cylinder so as to be slidable in a direction perpendicular to the axis and separated by a compression spring, and the other end portions are disposed in the approaching direction. Cross members;
A projecting plate supported swingably on the thumb turn cylinder and projecting from the core shaft is sandwiched from both sides in the direction orthogonal to the axis, and is opened by the projecting plate by the rotation input of the core shaft, Two pairs of sandwiching plates that move the other ends of the pair of release cross members in the separating direction and slide the pair of main stoppers in the engagement release direction between the one ends; and
Crime prevention thumb turn characterized by comprising.   The crime prevention thumb turn according to claim 1 or 2, wherein the button protrudes from the front and back surfaces of the knob at a position substantially in the center in the protruding direction toward the indoor side of the knob. The knob is rotatably attached to the knob;
The button protrudes radially outward from the knob;
A button through hole for restricting the rotation of the knob relative to the knob is made by loosely fitting a button protruding from the knob, and the knob is perforated.
The step that prevents the button from being pressed by contacting the peripheral edge of the button through hole by rotating the knob relative to the knob so that the button through hole and the button are eccentric. The security thumb turn according to any one of claims 1, 2, and 3, wherein the security thumb turn is formed on a button.   Each of the pair of buttons has a play length in each pushing stroke, and convex portions having a height substantially equal to the total of the play lengths of the two buttons are surfaces of the pair of buttons facing each other. 5. The button according to claim 1, wherein when the pair of buttons are pushed in, the two buttons are positioned with the convex portion interposed therebetween. Security thumb turn described in one.

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