JP4478619B2 - Thumb turn unit - Google Patents

Description

  The present invention relates to a thumb turn unit used for a lock or the like, and more particularly to a device capable of preventing unauthorized unlocking called so-called thumb turn.

  Conventionally, a lock that is attached to a door or the like and locks or unlocks by moving a lock bolt in and out is used. The lock bolt is moved in and out by rotating a knob member (thum turn) or a cylinder lock. Normally, a thumb turn is provided on the indoor side, a cylinder lock is provided on the outdoor side, and locking / unlocking from the outside is performed using a key.

  The door frame to which the door is fixed is provided with a storage portion that can store a lock bolt protruding from the side surface of the door. And locking / unlocking is performed by making a lock bolt enter / exit a storage part. When the lock bolt is in the storage portion, it is locked, and when it is out of the storage portion, it is unlocked.

  In recent years, crimes that infiltrate houses by means of so-called thumb turn, in which a door is drilled or a tool is inserted through the gap between the door and the door's mounting frame, and the knob is turned to unlock it, have been rampant. It has become a social problem. In order to solve this problem, for example, as shown in Patent Document 1 below, there has been proposed a measure for preventing unauthorized unlocking by so-called thumb turn by providing a thumb turn cover at a position surrounding a knob member of a door.

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

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

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

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

The invention according to claim 1, which is provided to achieve the above-described object, includes a fixing member attached to the door, and a rotating member that is rotatable relative to the fixing member and exposed to the outside. In a thumb turn unit that can be locked and unlocked by rotating a member, and that can be locked and unlocked using a predetermined key, the rotating member has a rotation control mechanism, and the rotation The control mechanism has two lock arms that can be swung, a button that is exposed to the outside and can be swung by a pushing operation, and a predetermined key that is disposed between the lock arms. A spindle capable of rotating when used, and the lock arm is provided with a rotation blocking portion for blocking relative rotation between the rotating member and the fixed member . The Together is to swing in a direction coming close to or moving away from the axis of rotation of bundles, the spindle is intended to swing away lock arm each other by rotation, button press operation, and the rotation of the spindle The thumb turn unit is characterized in that, when any of the operations is performed, the lock arm swings and the blocking of the relative rotation can be released.

According to the first aspect of the present invention, rotation is performed by using a rockable lock arm, a button exposed to the outside and capable of rocking the lock arm by a pushing operation, and a predetermined key. A rotation control mechanism provided with a spindle capable of rotation, and the lock arm is provided with a rotation blocking portion for blocking relative rotation between the rotation member and the fixed member, When either the pushing operation or the rotation operation of the spindle is performed, the lock arm swings and the prevention of the relative rotation can be released. The relative rotation between the rotating member and the fixed member can be prevented, and the release of the blocking can be reliably performed.
In addition, two lock arms are provided, and the swinging direction of the lock arm is a direction approaching / separating from the rotation axis of the spindle, and the spindle is disposed between the lock arms, and the rotation of the spindle Thus, the lock arms are rocked away from each other, so that the structure for releasing the rotation prevention by the rotation of the spindle is not complicated.

The invention according to claim 2 includes a fixing member attached to the door, and a rotating member that is rotatable relative to the fixing member and exposed to the outside. The rotating member is rotated to lock and unlock. In the thumb turn unit that can be locked and unlocked even by using a predetermined key, the rotating member has a rotation control mechanism, and the rotation control mechanism includes two swingable units. Each of the lock arms, a button that is exposed to the outside and that can be swung by a push operation, and a spindle that can be rotated by using a predetermined key are provided. Is provided with a rotation preventing portion for preventing relative rotation between the rotating member and the fixed member, and swings around the pin as a fulcrum, and the button is disposed at the button side end portion of the lock arm, The The spindle is disposed at the end of the lock arm on the spindle side, and the positional relationship between the rotation preventing portion and the pin is such that when the end of the lock arm is moved away from the spindle side, the rotation preventing portion is The thumb turn unit is characterized in that when the button side end of the lock arm moves to the inside of the thumb turn unit, the rotation blocking portion moves to the inside of the thumb turn unit.
According to a third aspect of the present invention, the rotation preventing portion of the lock arm has a protruding shape, and the rotation preventing portion is inserted into the slit of the fixing member to prevent rotation, and the rotation preventing portion moves inward. 3. The thumb turn unit according to claim 1, wherein the thumb turn unit is released from the slit to prevent rotation prevention.

According to the third aspect of the present invention, the rotation preventing portion of the lock arm has a protruding shape, and the rotation preventing portion is inserted into the slit of the fixing member to prevent rotation, and the rotation preventing portion moves inward. Accordingly, the rotation prevention is released by exiting from the slit, so that the relative rotation between the rotating member and the fixed member can be prevented and the release of the prevention can be more reliably performed.

According to a fourth aspect of the present invention, the rotating member is provided with a shaft portion, the shaft portion is provided with an internal space penetrating in the axial direction, and the lock arm is disposed in the internal space. The thumb turn unit according to any one of claims 1 to 3, wherein the thumb turn unit is swingable with respect to the shaft portion.

According to the fourth aspect of the present invention, the lock arm is disposed in the internal space of the shaft portion of the rotating member and can swing with respect to the shaft portion. Easy to place.

According to a fifth aspect of the present invention, the spindle has a convex portion, the convex portion is arranged between the end portions of the lock arm, and the relative rotation of the spindle causes a gap between the end portions of the lock arm. The thumb-turn unit according to any one of claims 1 to 4, wherein the thumb-turn unit is pushed and swung to swing the lock arm.

  According to the fifth aspect of the present invention, the spindle has a convex portion, the convex portion is arranged between the end portions of the lock arm, and the end of the lock arm is rotated by relative rotation of the spindle. Since the gap is expanded and the lock arm is swung, rotation prevention can be released with a simpler structure.

  A sixth aspect of the present invention is the thumb turn unit according to the fifth aspect, wherein the convex portion of the spindle is a minus type.

  According to the sixth aspect of the present invention, since the convex portion of the spindle is a minus type, the rocking of the lock arm due to relative rotation can be increased.

  According to the thumb turn of the present invention, unauthorized unlocking can be reliably prevented.

  Hereinafter, specific examples of the present invention will be described. FIG. 1 is a perspective view showing a thumb turn unit according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the thumb turn unit of FIG. FIG. 3 is an exploded perspective view of the rotating member. 4A and 4B are perspective views of the main body of the rotating member, where FIG. 4A is a view seen from the front side, and FIG. 4B is a view seen from the door side. FIG. 5 is a perspective view showing a shaft portion and a spindle of the rotating member. FIG. 6 is a cross-sectional view of the shaft portion. FIG. 7 is a front view of the spindle. 8A and 8B are schematic diagrams showing the movement of the button, the lock arm, and the spindle. FIG. 8A is a diagram showing a state where the button is not pressed, and FIG. 8B is a diagram showing a state where the button is pressed. . FIG. 9 is a perspective view showing the lid. FIG. 10 is a cross-sectional view taken along the line BB showing the lid. FIG. 11 is a cross-sectional view taken along the line EE showing the fixing member. FIG. 12 is a partial cross-sectional perspective view showing the cover. FIGS. 13A and 13B are perspective views showing buttons, where FIG. 13A shows a state where a pair of adjacent buttons are not pressed, and FIG. 13B shows a state where only one of a pair of adjacent buttons is pressed. is there. 14-17 is sectional drawing of a pair of adjacent button, (a) is a figure which shows CC cross section, (b) is a figure which shows DD cross section. FIG. 18 is a perspective view showing a modification of the rotating member.

  The thumb turn unit 1 in the first embodiment of the present invention is shown in FIG. 1 and is used by being attached to a door 90 together with a cylinder 91. Then, the rotary member 10 of the thumb turn unit 1 can be rotated to advance or retract a lock bolt (not shown). As in the normal case, a lock bolt (not shown) can be advanced and retracted by rotating the mechanism portion of the cylinder 91 with the key 92.

  As shown in FIG. 2, the thumb turn unit 1 is provided with a rotating member 10, a fixing member 11, a spring 12, and a collar 13. The fixing member 11 is provided with a screw hole 19 and can be connected to the door 90 side by screwing a screw (not shown) into the screw hole 19.

  As shown in FIG. 3, the rotating member 10 includes a cap 20, a lid portion 21, a main body portion 22, a rotation control mechanism 23, a shaft portion 24, and a spindle 25.

  As shown in FIG. 1, the main body portion 22 is a portion that is exposed to the outside in a use state, and is a portion that can be rotated by the user. 4A and 4B, the main body 22 is a cylindrical member, has an internal space 28, and has openings 31 and 32 on both sides. Further, four notches 27 and four protrusions 33 are provided on one opening 31 side (left side in FIG. 4A, right side in FIG. 4B).

The notch 27 is formed so as to extend from the opening 31 in the axial direction of the cylinder, and penetrates between the internal space 28 and the outside by the notch 27. Further, as shown in FIG. 4A, two notches 27 are close to each other to form a pair of notches 27, and the pair of notches 27 is 180 ° rotationally symmetrical. It is provided in such a position. In addition, buttons 40 and 41 to be described later are arranged in the cutout portion 27.
The protrusion 33 is a protrusion that protrudes toward the internal space 28. And this projection part 33 fits into the recessed part 42 of the axial part 24 arrange | positioned in the internal space 28. As shown in FIG.

  Two square holes 45 and two round holes 47 extending in the axial direction are provided on the end face on one opening 31 side (left side in FIG. 4A).

  Further, four groove portions 30 extending in a circumferential shape are provided on the end surface on the other opening 32 side (the right side in FIG. 4A). Each groove portion 30 has a deep valley portion 30a near the center in the circumferential direction, an end portion in the circumferential direction is almost the same height as the end surface, and has a different depth depending on the location. And it inclines toward the trough part 30a and becomes V shape. As will be described later, when the fixing member 11 and the main body 22 rotate relative to each other, and the moderation pin 46 disposed in the moderation pin insertion hole 72 of the fixing member 11 relatively moves in the groove portion 30, there is almost a step difference. You can move without. In addition, the moderation pin 46 is in the state of protruding the first in the valley portion 30a of the groove portion 30.

5 and 6, the shaft portion 24 is a cylindrical member provided with an internal space 37 penetrating in the axial direction. As will be described later, the shaft portion 24 is connected to and integrated with the main body portion 22. The shaft portion 24 is provided with a large diameter portion 35 and a small diameter portion 36, and the outer diameter of the large diameter portion 35 is larger than the small diameter portion 36.
The large diameter portion 35 is open on both sides in the direction perpendicular to the axial direction, and a planar inner side surface 35 a is provided inside the large diameter portion 35. The inner side surface 35a is provided in two places, and is in a positional relationship parallel to each other. In addition, the buttons 40 and 41 of the rotation control mechanism 23 are arranged inside the large diameter portion 35, and the buttons 40 and 41 are guided by the inner side surface 35a.

The inner surface 35a is provided with a recess 35b extending in the axial direction. Two recesses 35b are provided on each inner surface 35a, and a total of four recesses 35b are provided. And the front-end | tip of the pins 40b and 41b inserted in the through-holes 40a and 41a of the buttons 40 and 41 can approach into the recessed part 35b, and can prevent pushing operation of the buttons 40 and 41. FIG.
A screw hole 38 is provided at the end of the large diameter portion 35 of the shaft portion 24. A recess 42 is disposed near the screw hole 38.

The small diameter portion 36 has a cylindrical shape, and a circumferential groove 48 is provided in the body portion. Further, the internal space 37 inside the small diameter portion 36 is provided with a spindle insertion portion 37a having a circular cross-sectional shape and a lock arm insertion portion 37b having a rectangular cross-sectional shape.
Then, the spindle 25 is inserted into the spindle insertion portion 37a, and the pin 49 is inserted into the through hole 36a penetrating the spindle insertion portion 37a, so that the spindle 25 can be fixed in a swingable manner. Further, since the through hole 36a has a long hole shape that is long in the circumferential direction, the relative rotation between the spindle 25 and the shaft portion 24 is possible only slightly.

By inserting the lock arm 43 into the lock arm insertion portion 37b and inserting the pin 52 into the through hole 36b penetrating the lock arm insertion portion 37b, the lock arm 43 can be fixed in a swingable manner.
A through hole 50 is provided at a position near the through hole 36a. The through hole 50 is a square hole penetrating substantially perpendicular to the through hole 36a and the axial direction.

The spindle 25 is provided with a minus type convex part 25a and a plus type concave part 25b at both ends in the axial direction, and further has a through hole 25c into which the pin 49 is inserted. The minus type convex part 25a is a part protruding linearly. When the spindle 25 is fixed to the shaft portion 24, the rotational force of the shaft portion 24 is transmitted to the spindle 25.
Further, the minus type convex portion 25 a is sandwiched between the end portions 75 of the two lock arms 43. Therefore, when the relative rotation between the spindle 25 and the shaft portion 24 is performed, the end portions 75 of the two lock arms 43 are swung away from each other, and the rotation preventing portion 51 moves to the axial center side.

As shown in FIG. 7, the plus-type recess 25 b is a portion in which a recess is formed in a cross shape. The plus-type recess 25b can be engaged with a predetermined member, and by rotating the spindle 25 in this engaged state, a lock bolt (not shown) enters and exits to lock and unlock. be able to.
In addition, by operating the key 92 described above, a lock bolt (not shown) can enter and exit to perform locking and unlocking, but when the key 92 is used for locking and unlocking, The spindle 25 can be rotated through the predetermined member. Then, by rotating the spindle 25, the shaft portion 24 and the spindle 25 are rotated relative to each other, swinging so that the end portions 75 of the two lock arms 43 are separated from each other, and the rotation blocking portion 51 is pivoted. Moving to the center side, the rotation of the rotating member 10 is released and the rotating member 10 rotates.

As shown in FIG. 3, the rotation control mechanism 23 is provided with a first button 40, a second button 41, a lock arm 43, pins 40 b and 41 b, and springs 53 and 54.
The first button 40 is provided with a narrow part 58 and a wide part 59 wider than the narrow part 58, and has a step part 57 at the boundary. The wide portion 59 is provided with a through hole 40a having a circular cross section and a circular recess 40c. Further, a through hole 56 is provided on the central axis side of the main body portion 22 and a spring 53 described later is inserted.

The second button 41 is provided with a protrusion 55 in the same shape as the first button 40. The second button 41 has a narrow portion 58 and a wide portion 59, and the wide portion 59 is provided with a through-hole 41a having a circular cross section and a circular recess 41c. The protruding direction of the protrusion 55 is a direction perpendicular to the through direction of the through hole 41a.
The protrusion 55 is disposed so as to protrude toward the lock arm 43, and the lock arm 43 can be swung when the second button 41 moves inward. The protrusion 55 is provided only on the second button 41 and is not provided on the first button 40.

  The first button 40 and the second button 41 are disposed in the cutout portion 27, with the narrow portion 58 on the outside and the wide portion 59 on the inside. As will be described later, the first button 40 and the second button 41 are urged outward, but the stepped portion 57 is caught by the rod-shaped portion 27b between the cutout portions 27. The first button 40 and the second button 41 are not released. Further, since the first button 40 and the second button 41 are separate members, when only one button 40, 41 is pressed, the other button 41, 40 does not move.

  Further, the first button 40 and the second button 41 are arranged between two inner side surfaces 35 a provided on the shaft portion 24 of the rotating member 10 in a state where they are adjacent to each other. The buttons 40 and 41 move along the inner side surface 35a. Therefore, the pushing direction of the buttons 40 and 41 is a direction from the outside toward the inside.

  Then, when the pair of adjacent buttons 40 and 41 are not pushed, the through hole 40a of the first button 40 and the recess 41c of the second button 41 are formed as shown in FIGS. The through hole 41a of the second button 41 is located between the recess 40c of the first button 40 and the recess 35b.

  The pins 40b and 41b are round bars and have the same shape. The lengths of the pins 40b and 41b are longer than the widths of the buttons 40 and 41, that is, the lengths of the through holes 40a and 41a. Therefore, the pins 40b and 41b protrude from either of the through holes 40a and 41a, and are in a state where they enter the recesses 41c and 40c of the other buttons 41 and 40 and the recess 35b of the inner side surface 35a.

The lock arm 43 is a rod-like member, and is provided with a protrusion-like rotation blocking portion 51 and a through hole 76. As described above, the pin 52 of the shaft portion 24 can be swung about the shaft, and the direction in which the protrusion-shaped rotation blocking portion 51 moves by the swing is the protruding direction of the rotation blocking portion 51. For this reason, it is possible to change the position of the rotation prevention part 51 by rocking | fluctuating the lock arm 43. FIG.
The position of the through hole 76 is a position close to the end portion 75 side and is a position far from the rotation blocking portion 51.

Two buttons 40 and 41 and two lock arms 43 are provided. Then, the buttons 40 and 41 are arranged adjacent to each other in the pair of cutout portions 27 of the main body portion 22, and the first button 40 or the second button 41 is arranged in all the cutout portions 27. . Further, the lock arm 43 is disposed inside the protrusions 55 of the two second buttons 41, and the corresponding lock arm 43 swings when the protrusion 55 moves inward.
Two pairs of adjacent buttons 40 and 41 are provided. The arrangement of the buttons 40 and 41 in each group is such that the buttons 40 and 41 are 180 ° rotationally symmetric with respect to the center of the rotating member 10. The pushing directions of 40 and 41 are opposite to each other and are directed to the other pair of buttons 40 and 41.

FIG. 8 shows the positional relationship between a part of the buttons 40, 41, the lock arm 43, and the fixing member 11.
Usually, the rotation prevention part 51 is arrange | positioned at the slit 70 of the fixing member 11, and the relative rotation of the rotation member 10 and the fixing member 11 is prevented. Then, when a pair of adjacent buttons 40 and 41 are pressed and the projection 55 of the second button 41 moves inward, it rotates around the through-hole 76 and the rotation blocking portion 51 of the lock arm 43 is released from the slit 70. Escape and move inward. If the rotation prevention part 51 moves inside, it will move inside the slit 70 and the relative rotation of the rotating member 10 and the fixing member 11 can be made possible.

The spring 53 urges the buttons 40 and 41 outward. Specifically, a spring 53 is arranged between the buttons 40 and 41 (not arranged next to each other) provided at positions facing each other in a direction perpendicular to the central axis. The spring 54 is provided between the two lock arms 43 and urges each lock arm 43 outward.
Accordingly, in a normal state, the buttons 40 and 41 and the lock arm 43 are moved outward.

  The lid portion 21 is disposed on the protruding portion 33 side of the main body portion 22 and has a disk shape having a concave portion 21a. And it has the two through-holes 21b which have a conical concave part, and the two square holes 21c, and the through-hole 21b is provided in the position corresponding to the screw hole 38 of the axial part 24, and the square hole 21c is The main body 22 is provided at a position corresponding to the square hole 45.

Further, as shown in FIGS. 9 and 10, two protrusions 60 and 61 and two recesses 63 are provided on the back side (the main body portion 22 side) of the lid portion 21. The protrusion 60 is square and is provided outside the square hole 21 c, and the protrusion 61 is circular and is provided at a position corresponding to the round hole 47 of the main body 22. The recess 63 is provided at a position corresponding to the tip 27 a of the rod-like portion 27 b between the pair of cutout portions 27.
When the lid portion 21 is attached, the protrusion 60 is inserted into the square hole 45 of the main body portion 22, the protrusion 61 is inserted into the round hole 47, and the concave portion 63 is between the pair of cutout portions of the main body portion 22. The tip 27a of the rod-like portion 27b is inserted.
Further, the cap 20 is disposed in the concave portion 21 a of the lid portion 21. The cap 20 is provided with an engaging portion 20 a, and the engaging portion 20 a is inserted into two square holes 21 c and fixed to the lid portion 21.

A screw 62 is inserted into the through hole 21b of the lid portion 21. The screw 62 can be screwed into the screw hole 38 of the shaft portion 24 through the round hole 47 of the main body portion 22. And since the projection part 33 of the main-body part 22 fits into the recessed part 42 of the axial part 24, and is pinched | interposed between the cover part 21 and the axial part 24, when it fixes with the screw | thread 62, the lid | cover part 21 and the main-body part 22 The shaft portion 24 is integrated, and the rotation of the main body portion 22 is transmitted to the shaft portion 24.
The buttons 40 and 41 and the lock arm 43 of the rotation control mechanism 23 are also connected to the shaft portion 24 and rotate together with the shaft portion 24, and thus interlock with the rotation of the main body portion 22.

As shown in FIGS. 2 and 11, the fixing member 11 includes a small diameter portion 65, a large diameter portion 67, and an eccentric portion 68.
The small diameter portion 65 has a cylindrical shape and is provided with four slits 70 extending in the axial direction. The width of the slit 70 is larger than the width of the rotation prevention unit 51 of the lock arm 43 of the rotation control mechanism 23, and the rotation prevention unit 51 can move to the slit 70. And in the state where rotation prevention part 51 is arranged in slit 70, rotation of main part 22 is blocked, and rotation prevention part 51 moves inward from slit 70, and it will be in the state where it is not arranged in slit 70. The main body 22 can be rotated. The slits 70 are provided every 90 °.
Normally, the lock arm 43 is urged outward, and the rotation preventing portion 51 is disposed in the slit 70, so that relative rotation between the fixing member 11 and the lock arm 43 is not possible.

Further, the outer diameter of the small diameter portion 65 is substantially the same or slightly smaller than the inner diameter of the main body portion 22, and the inner diameter of the small diameter portion 65 is the same or slightly larger than the small diameter portion 36 of the shaft portion 24. Therefore, the small diameter portion 65 can be inserted inside the internal space 28 of the main body portion 22 and outside the shaft portion 24.
The small diameter portion 65 is provided with a through hole 71 penetrating in the radial direction. The position of the through hole 71 corresponds to the position of the circumferential groove 48 of the shaft portion 24. Then, by inserting the pin 71 a into the through hole 71 and inserting the pin 71 a into the circumferential groove 48, the shaft portion 24 and the main body portion 22 can be rotated between the shaft portion 24 and the fixing member 11. Can be prevented from coming off.

The large diameter portion 67 is provided with a flange portion 66, and further provided with a moderation pin insertion hole 72.
The flange portion 66 is a portion that receives the urging force of the coiled spring 12, the spring 12 is disposed outside the large-diameter portion 67, and the fixing member 11 is attached to the front side (the side opposite to the door 90 side). Be forced.

The moderation pin insertion holes 72 are round holes with openings on the main body 22 side, and are provided at four positions every 90 °. A moderation pin 46 and a spring 75 are inserted into each moderation pin insertion hole 72, and the moderation pin 46 is urged toward the main body 22 side.
When the rotation position of the rotation blocking portion 51 of the lock arm 43 is the position of the flange portion 66, the rotation position of the moderation pin 46 is at the position of the valley portion 30a of the groove portion 30 shown in FIG. It is in a state that fits.

Although the eccentric portion 68 has a circular outer shape, the central axis of the eccentric portion 68 is deviated from the central axes of the small diameter portion 65 and the large diameter portion 67. The fixing member 11 is provided with an internal space 77 having a circular cross section, which is a portion into which the shaft portion 24 is inserted. The central axis of the internal space 77 is the small diameter portion 65 or the large diameter portion 67. Same as the central axis.
Further, the screw hole 19 used when the fixing member 11 is fixed to the door 90 side is provided in the eccentric portion 68. The shape of the eccentric portion 68 is matched with the shape of the attachment portion of the door 90.

  As shown in FIGS. 2 and 12, the collar 13 is a member provided with a substantially cylindrical internal space 80. Further, the inner diameter is larger than the outer diameter of the spring 12, and the spring 12 can be inserted. Further, the inner space 80 is provided with a circumferential protrusion 81 protruding inward, and the spring 12 can be compressed between the flange portion 66 and the protrusion 81 of the fixing member 11.

Next, a method for using the thumb turn unit 1 will be described.
As described above, by rotating the plus-shaped recess 25b of the spindle 25, a lock bolt (not shown) can be moved forward and backward to lock and unlock, but in a state where all the buttons 40 and 41 are not pressed, Since the rotation blocking portion 51 of the lock arm 43 is disposed in the slit 70, relative rotation between the fixing member 11 and the lock arm 43 is impossible. As shown in FIG. 1, even if a rotational force is applied to the rotating member 10 exposed to the outside, the spindle 25 cannot be rotated, and locking / unlocking operation cannot be performed.

And in order to rotate the rotation member 10, it is necessary to move the rotation prevention part 51 of the two lock arms 43 inside. In order to move the rotation blocking portions 51 of the two lock arms 43 inward, the two adjacent pairs of buttons 40 and 41 are pressed in the same manner, and all the buttons 40 and 41 are pressed. There must be.
That is, as shown in FIG. 13A, the pins 40b and 41b inserted in the buttons 40 and 41 protrude from the through holes 40a and 41a. Therefore, as shown in FIG. 14, in a normal state, the second button 41, the concave portions 41 c and 40 c of the first button 40, or the concave portion 35 b of the shaft portion 24 is entered.

  When only one of the adjacent buttons 40, 41 is moved, the positions of the through holes 40a, 41a are shifted from the positions of the recesses 41c, 40c of the buttons 41, 40, and therefore, as shown in FIG. To try to protrude outwards. However, the positions of the through holes 40a and 41a of the moved buttons 40 and 41 are shifted from the positions of the concave portions 35b of the shaft portion 24 and do not allow outward projection. Therefore, it is impossible to move the buttons 40 and 41 downward.

  For example, as shown in FIG. 16, when only the first button 40 is pressed, the pin 41b of the second button 41 is moved toward the concave portion 35b of the shaft portion 24 by the first button 40, and the second button 41 Button 41 cannot be moved downward (FIG. 16A). Further, the pin 40b of the first button 40 is caught in the recess 35b of the shaft portion 24 and the recess 41c of the second button 41 (FIG. 16B), and only the first button 40 cannot be pressed.

As shown in FIG. 17, when only the second button 41 is pressed, the pin 40b of the first button 40 is moved toward the concave portion 35b of the shaft portion 24 by the second button 41, and the first button 40 cannot move downward (FIG. 17A). Further, the pin 41b of the second button 41 is caught in the recess 35b of the shaft portion 24 and the recess 40c of the first button 40 (FIG. 17B), and only the second button 40 cannot be pressed.
In any case, since the second button 41 cannot move, the rotation preventing portion 51 of the lock arm 43 cannot be moved inward by the movement of the protrusion 55.

  However, when a pair of adjacent buttons 40 and 41 are pressed simultaneously, as shown in FIG. 15, the pins 40 b and 41 b inserted into the through holes 40 a and 41 a of the buttons 40 and 41 are recessed portions of the buttons 41 and 40. It moves with the positions of 41c and 40c aligned. Therefore, unlike the case described above, the positions of the buttons 40 and 41 can be changed even when the positions of the pins 40b and 41b are different from the positions of the recesses 35b of the shaft portion 24. When the adjacent buttons 40 and 41 are simultaneously pressed, the lock arm 43 is swung by the protrusion 55, and the rotation prevention unit 51 is moved inward.

Then, when two pairs of adjacent buttons 40 and 41 are pressed, that is, when all the buttons 40 and 41 are pressed, rotation prevention of the two lock arms 43 arranged in the slit 70 of the fixing member 11 is prevented. The part 51 moves inward, and relative rotation between the main body part 22 and the fixing member 11 becomes possible.
By rotating the main body portion 22 with all the buttons 40 and 41 being pressed, the spindle 25 provided at the tip of the shaft portion 24 can be rotated and locked or unlocked.

  Further, a moderation pin 46 is provided, and the rotation position of the moderation pin 46 is rotated so as to be in the moving direction in the rotation direction that matches the position of the valley portion 30a of the groove portion 30 shown in FIG. 4B. Force is generated. Therefore, when the main body 22 is rotated, the relative rotation from the groove portion 30 where the moderation pin 46 is located to the next groove portion 30 is further performed, and the moderation pin 46 is automatically moved toward the valley portion 30a shown in FIG. Rotate. In addition, when the rotation is stopped at the start of the rotation, the moderation pin 46 returns to the valley 30a where it was first.

Thus, in the thumb turn unit 1 of the present invention, it is impossible to lock or unlock unless the main body 22 is rotated while pressing all the buttons 40 and 41. Therefore, it becomes difficult to open a through hole in the door 90, insert a rod or the like into the through hole, and rotate the main body portion 22 with the rod to perform unauthorized unlocking.
If the adjacent buttons 40 and 41 are not pressed at the same time, the buttons 40 and 41 cannot be pressed, and rotating while pressing all of the four buttons 40 and 41 provided on both sides is inserted into the through hole. Some bars are difficult. Even if all the four buttons 40 and 41 can be pressed, if the relative position of the moderation pin 46 is not rotated to the next groove 30 in this pressed state, the position of the main body 22 is returned to the original state. Therefore, it is difficult to unlock the thumb turn unit 1 of the present invention by the above-described unauthorized unlocking method.

  Further, when locking and unlocking using the key 92 from the outside, the rotating member 10 can be rotated without pressing the buttons 40 and 41 as described above. That is, when the spindle 25 is rotated by operating the key 92, the rotation starts relative to the shaft portion 24 and the spindle 25, so that the end portions 75 of the two lock arms 43 are swung away from each other. Then, the rotation prevention part 51 moves to the axial center side, and the rotation member 10 becomes rotatable. Further, the rotating member 10 is rotated by rotating the spindle 25.

  Although the biasing direction of the moderation pin 46 of the thumb turn unit 1 is the axial direction, it can be provided in the radial direction (direction perpendicular to the central axis). For example, as shown in FIG. 18, a groove portion 84 may be provided in the outer circumferential direction like the rotating member 10 ′, and the moderation pin 46 may be biased from the outside toward the inside.

Next, the thumb turn unit 2 according to the second embodiment of the present invention will be described.
FIG. 19 is a perspective view showing a thumb turn unit according to the second embodiment of the present invention. 20 is an exploded perspective view of the thumb turn unit of FIG. FIG. 21 is an exploded perspective view of the rotating member according to the second embodiment of the present invention. 22 is a perspective view of the main body of the rotating member shown in FIG. 21, (a) is a view from the front side, and (b) is a view from the door side. FIG. 23 is an exploded perspective view showing a shaft portion and a spindle of the rotating member shown in FIG. FIG. 24 is a cross-sectional view of the shaft portion. FIG. 25 is a front view of the spindle. FIG. 26 is a schematic diagram illustrating the movement of the button, the lock arm, and the spindle according to the second embodiment of the present invention. FIG. 26A illustrates a state where the button is not pressed, and FIG. 26B illustrates the button. The figure which showed the state pushed, (c) is the figure which showed the state which rotated the spindle. FIG. 27 is a partial cross-sectional perspective view showing the collar according to the second embodiment of the present invention.

  The thumb turn unit 2 in the second embodiment of the present invention is shown in FIG. 19 and is used by being attached to a door 90 together with a cylinder 91. Then, the rotation member 110 of the thumb turn unit 2 can be rotated to advance or retract a lock bolt (not shown). As in the normal case, a lock bolt (not shown) can be advanced and retracted by rotating the mechanism portion of the cylinder 91 with the key 92.

  As shown in FIG. 20, the thumb turn unit 2 is provided with a rotating member 110, a fixing member 111, a spring 12, and a collar 113. The fixing member 111 is provided with a screw hole (not shown), and can be connected to the door 90 side by screwing a screw (not shown) into the screw hole.

  As shown in FIG. 21, the rotating member 110 includes a cap 120, a main body portion 122, a rotation control mechanism 123, a shaft portion 124, and a spindle 125.

As shown in FIG. 19, the main body 122 is a portion that is exposed to the outside in a use state, and is a portion that can be rotated by the user. Further, as shown in FIGS. 22A and 22B, the main body portion 122 is provided with a knob portion 73 and a base portion 74.
The outer shape of the knob 73 is a semicircular disk, and the outer shape of the base 74 is a disk. And the main-body part 122 is a shape which connects with the base part 74 in the linear part of the knob | pick part 73, Comprising: The connection part of the base part 74 passes the center of a disc. And the surface of the knob | pick part 73 and the surface of the base part 74 are connected so that it may become perpendicular | vertical.

The main body 122 is provided with an internal space 128. The internal space 128 has a knob portion side space 128 a formed inside the knob portion 73 and a base portion side space 128 b formed inside the base portion 74. A circular opening 132 is formed in the base portion side space 128b.
The knob portion side space 128a is a space into which a protruding portion 135 of the shaft portion 124 described later is inserted. By inserting the protruding portion 135 of the shaft portion 124 into the knob portion side space 128a, the rotation of the main body portion 122 is pivoted. Part 124. Further, as shown in FIG. 21, the main body portion 122 is provided with a through hole 147 and a screw 62 is inserted therein.

The semicircular tab portion 73 is provided with two through holes 126 penetrating the knob portion side space 128a. The positions of the two through holes 126 are opposed to each other, and are provided on the front and back of the plate surface. The through direction of the through hole 126 is a direction toward the rotation axis of the rotating member 110.
Then, a button 44 to be described later is inserted into the through hole 126. As shown in FIG. 19, when the button 44 is inserted into the through hole 126, a part of the button 44 is exposed and protrudes. Further, the two buttons 44 can be moved inward by picking the knob 73 while sandwiching the knob 73 during use.

  Further, four groove portions 130 extending circumferentially are provided on the end face of the opening 132 (the right side in FIG. 22A and the left side in FIG. 22B). Each groove 130 has a deep valley 130a in the vicinity of the center in the circumferential direction, the end in the circumferential direction is almost the same height as the end surface, and the depth varies depending on the location. And it inclines toward the trough part 130a and becomes V shape. As will be described later, when the fixing member 111 and the main body 122 rotate relative to each other, and the moderation pin 46 disposed in the moderation pin insertion hole 172 of the fixing member 111 moves relative to the groove portion 130, there is almost a difference in level. You can move without. In addition, the moderation pin 46 is in a state of protruding the first in the valley portion 130a of the groove portion 130.

23 and 24, the shaft portion 124 is a cylindrical member provided with an internal space 137 penetrating in the axial direction. As will be described later, the shaft portion 124 is connected to and integrated with the main body portion 122. The shaft portion 124 is provided with a protruding portion 135 and a small diameter portion 136. The protruding portion 135 has a shape protruding at two locations in the axial direction, and the outer width of the protruding portion 135 is larger than the outer diameter of the small diameter portion 136. In addition, the protrusion 135 has a flat cross section perpendicular to the axial direction, and the cross section has a flat shape with a long outer width of the protrusion, and this cross sectional shape matches the shape of the knob portion side space 128 a of the main body 122. And the protrusion part 135 is inserted in the knob | pick part side space 128a, a rotational force is transmitted between the main-body part 122 and the axial part 124, and it rotates similarly.
In addition, a screw hole 138 is provided in the protruding portion 135 of the shaft portion 124, and the screw 62 is attached.

  The small-diameter portion 136 has a cylindrical shape with a circular outer cross-sectional shape, and a circumferential groove 148 and a C-ring mounting groove 189 are provided in the body portion. In addition, the internal space 137 inside the small diameter portion 136 is provided with a spindle insertion portion 137a having a circular cross section and a lock arm insertion portion 137b having a rectangular cross section.

  The spindle 125 is inserted into the spindle insertion portion 137a. In this state, the C-ring 149 is attached to the C-ring attachment groove 189 to prevent the spindle 125 from dropping off. At this time, the two protrusions 125d provided on the spindle 125 are disposed in the notch 64 of the shaft portion 124, and the C ring 149 is disposed in the groove 125e between the two protrusions 125d. Therefore, relative rotation is possible between the spindle 125 and the shaft portion 124 by the notch 64.

Further, as shown in FIG. 24, the lock arm 143 is inserted into the lock arm insertion portion 137b of the internal space 137 of the shaft portion 124, and the pin 52 is inserted into the through hole 136b penetrating the lock arm insertion portion 137b. 143 can be pivotably fixed. When the lock arm 143 is attached to the shaft portion 124, the protrusion-shaped rotation preventing portion 151 is protruded from the small diameter portion 136 of the shaft portion 124, and the button side end portion 86 of the lock arm 143 is protruded from the shaft portion 124. Located on the 135 side.
As shown in FIG. 21, two lock arms 143 are provided, and the rocking direction of each lock arm 143 is a direction in which the lock arm 143 approaches or separates from the rotation shaft of the rotating member 110 or the spindle 125.

  The shaft portion 124 is provided with a through hole 150. The through hole 150 is a square hole that penetrates substantially perpendicularly to the axial direction of the through hole 136b.

As shown in FIGS. 23 and 25, the spindle 125 is a shaft-like member, and is a member provided with a negative-type convex portion 125a as a convex portion and a positive-type concave portion 125b as a concave portion at both ends in the axial direction. is there. Further, the body portion of the spindle 125 has the above-described protrusion 125d and groove 125e.
The minus-shaped convex part 125a is a part protruding linearly, and the cross-sectional shape perpendicular to the rotation axis of the rotating member 110 is rectangular. When the spindle 125 is fixed to the shaft portion 124, the minus type convex portion 125 a is sandwiched between the spindle side end portions 75 of the two lock arms 143. For this reason, when the relative rotation between the spindle 125 and the shaft portion 124 is performed, the end portions 75 of the two lock arms 143 are swung away from each other, and the rotation preventing portion 151 moves to the axial center side.

  Note that a portion provided on the spindle 125 and disposed between the spindle-side end portions 75 of the two lock arms 143 has a shape in which the shape of the cross section perpendicular to the rotation axis of the rotating member 110 is flat, and is rotated. Any shape other than the shape of the negative projection 125a may be used.

  As shown in FIG. 25, the plus-type recess 125b is a portion where a recess is formed in a cross shape. The plus-type recess 125b can be engaged with a predetermined member. When the spindle 125 is rotated in this engaged state, a lock bolt (not shown) enters and exits to lock and unlock. be able to.

As shown in FIG. 21, the rotation control mechanism 123 is provided with a button 44, a lock arm 143, and springs 53 and 54.
The button 44 has an exposed portion 44a and a lock arm operation piece 155, and a hole 156 is formed on the back side of the exposed portion 44a.

Two buttons 44 of this embodiment are provided, and each button 44 is disposed in the through hole 126, and a part of the exposed portion 44a is exposed to the outside. In addition, the protruding direction of the exposed portion 44a of the two buttons 44 is outward and opposite to each other, and by pressing the two buttons 44 so as to sandwich the two buttons 44, The button 44 can be moved inward simultaneously. Thus, the pushing direction of the button 44 is a direction from the outside toward the inside.
Further, a spring 53 described later is inserted into the hole 156 to urge the two buttons 44 outward. The button 44 does not come out of the through hole 126 and come off when the lock arm operating piece 155 is caught.

  The lock arm operation piece 155 is disposed outside the button-side end portion 86 of the lock arm 143, and the lock arm operation piece 155 is pushed and operated by pushing the exposed portion 44a of the button 44. The lock arm 143 can be swung by pushing the button-side end portion 86 of 143 inward. Specifically, when the exposed portion 44a moves inward, the rotation prevention portion 151 of the lock arm 143 moves inward.

The lock arm 143 is a rod-like member, and is provided with a protrusion-like rotation blocking portion 151 and a through hole 176. As described above, the lock arm 143 can swing around the pin 52 of the shaft portion 124 as an axis (fulcrum), and the rotation preventing portion 151 moves by this swinging. This swinging direction is the protruding direction of the rotation prevention unit 151, and the position of the rotation prevention unit 151 can be changed by the swinging of the lock arm 143.
The position of the through-hole 176 serving as a fulcrum for swinging the lock arm 143 is a position close to the end portion 75 on the spindle 125 side and a position far from the rotation prevention portion 151. Therefore, even when the lock arm 143 is swung in the same manner, the distance is larger when the button side end portion 86 is moved inward than when the spindle side end portion 75 is moved outward. In addition, the distance of the pressing operation of the button 44 when the rotation prevention is canceled can be secured, and the relative rotation of the spindle 125 can be reduced.

Two buttons 44 and two lock arms 143 are provided. The two buttons 44 are disposed so as to face the two through holes 126 of the main body 122. Further, the respective lock arms 143 are arranged inside the lock arm operation pieces 155 of the two buttons 44, and the corresponding lock arm 143 swings when the lock arm operation piece 155 moves inward.
Although two buttons 44 are provided, the buttons 44 are arranged so as to be 180 ° rotationally symmetric with respect to the center of the rotating member 110, and the pushing directions of the buttons 44 are opposite to each other. It faces the other button 44 side.

  FIG. 26 shows the positional relationship between a part of the button 44, the lock arm 143, and the fixing member 111.

The spring 53 urges the button 44 outward, and the spring 53 is disposed between the buttons 44. The two buttons 44 are provided at positions facing each other in a direction perpendicular to the rotation axis of the rotating member 111 and urge the buttons 44 outward. The spring 54 is provided between the two lock arms 143 and urges each lock arm 143 toward the outside.
Therefore, in a normal state, as shown in FIG. 26A, the button 44 and the lock arm 143 are moved and positioned outside.

  In addition, as shown in FIG. 26A, in a normal state where the rotation preventing portion 151 is disposed in the slit 170 of the fixing member 111 and the button 44 is not pushed, the relative relationship between the rotating member 110 and the fixing member 111 is set. The rotation is blocked. When the button 44 is pressed and the lock arm operation piece 155 of the button 44 moves inward, the button 44 rotates around the through-hole 176, and the rotation preventing portion 151 of the lock arm 143 escapes from the slit 170 and moves inward. (FIG. 26 (b)). When the rotation prevention part 151 moves inward, it moves to the inside of the slit 170, and relative rotation between the rotating member 110 and the fixed member 111 can be made possible.

  Also, by operating the key 92 described above, a lock bolt (not shown) can enter and exit to lock and unlock, but the rotation blocking unit 151 of the thumb turn unit 2 prevents the rotation member 110 from rotating. Since it is blocked, it is necessary to cancel it. Therefore, when locking / unlocking operation is performed with the key 92, the spindle 125 rotates and rotates relative to the lock arm 143 as shown in FIG. The space between the spindle-side end portions 75 of 143 is expanded and the lock arm 143 is swung. Then, the two lock arms 143 are swung so that the spindle side end portions 75 are separated from each other, the rotation preventing portion 151 moves to the axial center side, the rotation of the rotating member 110 is released, and the rotating member 110 is released. Rotate.

A screw 62 is inserted through the through hole 147 of the main body 122. The screw 62 can be screwed into the screw hole 138 of the shaft portion 124. And the main-body part 122 and the axial part 124 are fixed.
Note that the button 44 and the lock arm 143 of the rotation control mechanism 123 also rotate together with the shaft portion 124, and thus interlock with the rotation of the main body portion 122.

  Further, the cap 120 is attached to the knob 73 of the main body 122. The cap 120 is a semicircular arc-shaped member aligned with the edge of the knob 73, and the cap 120 is provided with an engaging portion 120a. Then, the engaging portion 120 a is inserted into the concave portion 73 a provided on the surface side of the knob portion 73 and fixed to the main body portion 122.

As shown in FIG. 20, the fixing member 111 includes a bearing member 115 and a housing member 116. Then, with the bearing member 115 inserted into the insertion portion 116 a of the housing member 116, the screw 83 is inserted into the through hole 116 a of the housing member 116, and the screw 83 is screwed into a screw hole (not shown) provided in the bearing member 115. In combination, the bearing member 115 and the housing member 116 are integrated.
As shown in FIG. 20, the fixing member 111 has a small diameter portion 165, a large diameter portion 167, and an eccentric portion 168.

The small diameter portion 165 is a part of the bearing member 115 and has a cylindrical shape, and is provided with four slits 170 extending in the axial direction. The width of the slit 170 is larger than the width of the rotation prevention unit 151 of the lock arm 143 of the rotation control mechanism 123, and the rotation prevention unit 151 can move to the slit 170. In the state where the rotation prevention unit 151 is disposed in the slit 170, the rotation of the main body unit 122 is prevented, and the rotation prevention unit 151 moves inward from the slit 170 and is not disposed in the slit 170. The main body 122 can be rotated. The slit 170 is provided every 90 °.
Usually, the lock arm 143 is urged outward, and the rotation preventing portion 151 is disposed in the slit 170, so that relative rotation between the fixing member 111 and the lock arm 143 is impossible.

Further, the outer diameter of the small diameter portion 165 is substantially the same or slightly smaller than the internal space 128 of the main body portion 122, and the inner diameter of the small diameter portion 165 is the same as or slightly larger than the small diameter portion 136 of the shaft portion 124. Therefore, the small diameter portion 165 can be inserted inside the internal space 128 of the main body portion 122 and outside the shaft portion 124.
The small diameter portion 165 is provided with a through hole 171 penetrating in the radial direction. The position of the through-hole 171 corresponds to the position of the circumferential groove 148 of the shaft portion 124 shown in FIGS. Then, by inserting the pin 71 a into the through hole 171 and inserting the pin 71 a into the circumferential groove 148, the shaft portion 124 and the main body portion 122 can be rotated between the shaft portion 124 and the fixing member 111. Can be prevented from coming off. When the thumb turn unit 2 is assembled, the pin 71a is positioned inside the base portion 74 of the main body portion 122, so that the pin 71a does not come off and come off.

  The large-diameter portion 167 is provided with a flange portion 166, a screw portion 166a, and a moderation pin insertion hole 172. The flange portion 166 is a part of the bearing member 115, the screw portion 166 a is a part of the housing member 116, and the moderation pin insertion hole 172 is formed in the bearing member 115.

The flange portion 166 is a flange-shaped portion having a circular outer shape. Further, the moderation pin insertion hole 172 is an opening formed in the flange portion 166 and is a bottomed round hole that opens on the rotating member 110 side and extends in the rotation axis direction of the rotating member 110. The moderation pin 46 and the spring 75 are inserted into the moderation pin insertion hole 172, and the moderation pin 46 is urged toward the main body 122 side.
The screw portion 166 a is a male screw-like portion formed on the outer periphery of the large diameter portion 167 and is screwed with the screw portion 113 a of the collar 113.

  The positional relationship between the rotational position of the moderation pin insertion hole 172 and the moderation pin 46 and the rotational position of the trough 130a of the groove 130 provided in the rotating member 110 is as follows. That is, in the state where the rotation preventing portion 151 of the lock arm 143 is at the rotation position of the slit 170, the rotation position of the moderation pin 46 is in a state matching the position of the valley portion 130a of the groove portion 130.

Although the eccentric part 168 has a circular outer shape, the center of the eccentric part 168 is deviated from the central axis of the small diameter part 165 or the large diameter part 167.
Further, the shape of the eccentric portion 168 is matched with the shape of the attachment portion of the door 90.

  As shown in FIG. 27, the collar 113 is provided with a substantially cylindrical inner space 80, and a threaded portion 113a is formed inside. Then, the screw portion 166 a of the fixing member 111 and the screw portion 113 a of the collar 113 are screwed together, and the fixing member 111 is disposed in the internal space 80.

Next, a method for using the thumb turn unit 2 will be described.
As described above, by rotating the plus-type recess 125b of the spindle 125 of the thumb-turn unit 2, the lock bolt (not shown) can be advanced and retracted to lock and unlock, but the two buttons 44 are not pressed. In the state, since the rotation blocking portion 151 of the lock arm 143 is disposed in the slit 170, relative rotation between the fixing member 111 and the lock arm 143 is impossible. Further, even if a rotational force is applied to the rotating member 110, the spindle 125 cannot be rotated, and the locking / unlocking operation cannot be performed.

  And in order to rotate the rotation member 110, it is necessary to move the rotation prevention part 151 of the two lock arms 143 inside. In order to move the rotation prevention portions 151 of the two lock arms 143 inward, the two buttons 44 are pressed at the same time.

That is, by simultaneously pressing the two buttons 44, the two lock arms 143 are swung by the lock arm operation piece 155, and the two rotation prevention portions 151 are moved inward.
Therefore, when the two buttons 44 are pressed, the rotation prevention portions 151 of the two lock arms 143 arranged in the slits 170 of the fixing member 111 move inward to escape from the slits 170, and Relative rotation with the fixing member 111 is possible.
Accordingly, when the main body 122 is rotated while the two buttons 44 are pressed, the spindle 125 provided at the tip of the shaft portion 124 can be rotated and locked or unlocked.

  Further, a moderation pin 46 is provided, and the rotation position of the moderation pin 46 is rotated in the direction of movement in the rotation direction that matches the position of the valley portion 130a of the groove portion 130 shown in FIG. Force is generated. Therefore, when the main body portion 122 is slightly rotated, the relative rotation from the groove portion 130 where the moderation pin 46 is located to the next groove portion 130 is further performed, and the moderation pin 46 is directed toward the trough portion 130a shown in FIG. Rotates automatically. Further, when the rotation is stopped at the start of the rotation, the moderation pin 46 returns to the valley portion 130a where it was first.

Thus, in the thumb turn unit 2 of the present invention, it is impossible to lock or unlock unless the main body 122 is rotated while pressing the two buttons 44. Therefore, it is difficult to open a through hole in the door 90, insert a bar or the like into the through hole, and rotate the main body 122 with the bar to perform unauthorized unlocking.
That is, unless the two buttons 44 are pressed simultaneously, the rotating member 110 cannot be rotated, which is difficult depending on the rod inserted into the through hole. Even if the two buttons 44 can be pressed, if the relative position of the moderation pin 46 is not rotated to the next groove 130 in this pressed state, the position of the main body 122 returns to the original state. It is difficult to unlock the thumb turn unit 2 of the present invention by the above-described unauthorized unlocking method.

  Further, when locking and unlocking using the key 92 from the outside, the rotating member 110 can be rotated without pressing the button 44 as described above. That is, when the spindle 125 is rotated by operating the key 92, the lock arm 143 does not rotate when the spindle 125 begins to rotate, and therefore the shaft portion 124 and the spindle 125 rotate relative to each other. Then, by rotating the minus-shaped convex portion 125a of the spindle 125, the end portions 75 of the two lock arms 43 are swung away from each other, and the rotation preventing portion 51 moves to the axial center side (inner side). The rotating member 110 can be rotated. Furthermore, the rotating member 110 rotates by rotating the spindle 25.

It is the perspective view which showed the thumb turn unit of the 1st Embodiment of this invention. It is a disassembled perspective view of the thumb turn unit of FIG. It is a disassembled perspective view of the rotating member of the 1st Embodiment of this invention. It is the perspective view of the main-body part of the rotation member of the 1st Embodiment of this invention, (a) is the figure seen from the near side, (b) is the figure seen from the door side. It is the perspective view which showed the axial part and spindle of the rotating member of the 1st Embodiment of this invention. It is sectional drawing of the axial part of the 1st Embodiment of this invention. It is a front view of the spindle of a 1st embodiment of the present invention. It is the model which showed the motion of the button of 1st Embodiment of this invention, a lock arm, and a spindle, (a) is the figure which showed the state which does not push a button, (b) is the state which pushed the button. FIG. It is the perspective view which showed the cover part of the 1st Embodiment of this invention. It is sectional drawing in the BB cross section which showed the cover part of the 1st Embodiment of this invention. It is sectional drawing in the EE cross section which showed the fixing member of the 1st Embodiment of this invention. It is the partial cross section perspective view which showed the color | collar of the 1st Embodiment of this invention. It is the perspective view which showed the button of the 1st Embodiment of this invention, (a) is a figure which shows the state which does not press a pair of adjacent buttons, (b) has pressed only one of a pair of adjacent buttons. It is a figure which shows a state. It is sectional drawing of a pair of adjacent button, (a) is a figure which shows CC cross section, (b) is a figure which shows DD cross section. It is sectional drawing of a pair of adjacent button, (a) is a figure which shows CC cross section, (b) is a figure which shows DD cross section. It is sectional drawing of a pair of adjacent button, (a) is a figure which shows CC cross section, (b) is a figure which shows DD cross section. It is sectional drawing of a pair of adjacent button, (a) is a figure which shows CC cross section, (b) is a figure which shows DD cross section. It is a perspective view which shows the modification of a rotating member. It is the perspective view which showed the thumb turn unit of the 2nd Embodiment of this invention. FIG. 20 is an exploded perspective view of the thumb turn unit of FIG. 19. It is a disassembled perspective view of the rotation member of the 2nd Embodiment of this invention. It is the perspective view of the main-body part of the rotating member shown in FIG. 21, (a) is the figure seen from this side, (b) is the figure seen from the door side. It is the disassembled perspective view which showed the axial part and spindle of the rotating member shown in FIG. It is sectional drawing of an axial part. It is a front view of a spindle. It is the schematic diagram which showed the motion of the button of the 2nd Embodiment of this invention, a lock arm, and a spindle, (a) is the figure which showed the state which does not push a button, (b) is the state which pushed the button. The figure shown and (c) are the figures which showed the state which rotated the spindle. It is the partial cross section perspective view which showed the color | collar of the 2nd Embodiment of this invention.

1, 2 Thumb turn unit 10, 10 ', 110 Rotating member 11, 111 Fixed member 22, 122 Main body 23, 123 Rotation control mechanism 24, 124 Shaft 25, 125 Spindle 25a, 125a Minus type convex part 37, 137 Internal space 40, 41, 44 Button 43, 143 Lock arm 51, 151 Rotation prevention part 53 Spring 70, 170 Slit 75 End part 90 Door 92 Key

Claims (6)

A fixing member attached to the door, and a rotating member that is rotatable relative to the fixing member and exposed to the outside, and can be locked / unlocked by rotating the rotating member; In thumb turn units that can be locked and unlocked using a key,
The rotating member has a rotation control mechanism, and the rotation control mechanism includes two lock arms that can be swung, a button that is exposed to the outside and can rock the lock arm by a pushing operation, A spindle arranged between the lock arms and capable of rotating by using a predetermined key is provided, and the lock arm rotates to prevent relative rotation between the rotating member and the fixed member. A blocking part is provided,
Each lock arm swings in a direction approaching or separating from the rotation axis of the spindle, and the spindle swings so that the lock arms are separated from each other by rotation.
A thumb-turn unit characterized in that when either a button pressing operation or a spindle rotating operation is performed, the lock arm swings to release the blocking of the relative rotation. A fixing member attached to the door, and a rotating member that is rotatable relative to the fixing member and exposed to the outside, and can be locked / unlocked by rotating the rotating member; In thumb turn units that can be locked and unlocked using a key,
The rotating member has a rotation control mechanism, and the rotation control mechanism includes two lock arms that can be swung, a button that is exposed to the outside and can rock the lock arm by a pushing operation, A spindle capable of rotating by using a predetermined key,
The lock arm is provided with a rotation preventing portion that prevents relative rotation between the rotating member and the fixed member, and swings around a pin as a fulcrum,
The button is arranged at the button side end of the lock arm, and the spindle is arranged at the spindle side end of the lock arm,
The positional relationship between the rotation prevention part and the pin is such that when the spindle side ends of the lock arm swing away from each other, the rotation prevention part moves to the axial center side of the thumb turn unit, and the button side end of the lock arm moves to the thumb turn. The thumb turn unit is characterized in that when it moves to the inside of the unit, the rotation prevention part moves to the inside. The rotation prevention part of the lock arm has a protruding shape, the rotation prevention part is inserted into the slit of the fixing member to prevent rotation, and the rotation prevention part moves inward to escape from the slit and release the rotation prevention. The thumb-turn unit according to claim 1 or 2 , wherein the thumb-turn unit is one. The rotating member is provided with a shaft portion, the shaft portion is a member provided with an internal space penetrating in the axial direction, and the lock arm is disposed in the internal space and can swing with respect to the shaft portion. The thumb turn unit according to any one of claims 1 to 3, wherein The spindle has a convex part, and the convex part is arranged between the ends of the lock arms, and the relative rotation of the spindle pushes and widens between the ends of the lock arm to swing the lock arm. The thumb turn unit according to any one of claims 1 to 4, wherein the thumb turn unit is provided.   6. The thumb turn unit according to claim 5, wherein the convex part of the spindle is a minus type.

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