JP2005133487A - Door lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door lock device in which a thumb-turn device can be locked from a cylinder lock side. <P>SOLUTION: The door lock device comprises a lock main body part 3 which has a dead bolt to advance/retreat by the rotational control to a dead bolt operation section 1 and is fixed to a door body 2, a thumb-turn device 4 for operating the dead bolt operation section 1 from an indoor side, a cylinder lock 7 for controlling the dead bolt operation section 1 from the indoor side by the rotational operation to the plug 6 inserted into the cylinder case 5, and a lock restraining body 9 which can restrain the dead bolt operation section 1 by the operation from the indoor side, maintain its restrain state with the cylinder lock 7 being set, and release the restrain state to the dead bolt operation section 1 by the operation of the cylinder lock 7 using a genuine unlocking key 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a door locking device.

  As a thumb turn device for preventing unauthorized unlocking operation to the door which is performed by inserting a tool or the like through a hole opened in the door and operating the thumb turn on the indoor side, the one described in Patent Document 1 is known. .

In this conventional example, the thumb-turn device includes a cylinder on which a thumb-turn member serving as a knob at the time of a rotation operation is fitted and a tail piece connected to the thumb-turn member via a clutch. The tailpiece is connected to the lock, and when the cylinder that can be operated from the indoor side is operated by the key, the clutch is disengaged, and the tailpiece can be rotated even if a rotational operation force is applied to the thumb-turn member thereafter. Unlocking operation becomes impossible.
Japanese Patent Laid-Open No. 2003-3702

  However, since the conventional example described above cannot be operated from the indoor side by the thumb turn member, it is necessary to operate the thumb turn member from the indoor side first, and the locking reliability of the thumb turn member lock is lacking. There are drawbacks.

  In other words, the thumb-turn member is a member that locks and unlocks from the indoor side, and when it enters the room from the outside, it is strongly recognized as a locking member, but on the other hand, when it goes out of the room, the door is opened and moved to the outside In order to pay attention to this, the thumb-turn member is exclusively recognized as an unlocking member. As a result, the locking operation on the thumb turn member is easily forgotten.

  For the same reason, when going out, the cylinder lock mounted on the outdoor side is often recognized as a locking member. Therefore, if the thumb turn member can be locked during the operation of the cylinder lock, the thumb turn member It can be expected to improve the reliability of the locking operation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a door locking device that can prevent the thumb turn device from being forgotten to be locked by enabling the thumb turn device to be locked from the cylinder lock side.

  Another object of the present invention is to provide a door cylinder lock that can be used in such a locking device.

According to the present invention, the object is
A lock body portion 3 that includes a dead bolt that is advanced and retracted by a rotation operation to the dead bolt operation portion 1 and is fixed to the door body 2;
A thumb turn device 4 for operating the deadbolt operation unit 1 from the indoor side;
A cylinder lock 7 for operating the dead bolt operating portion 1 from the outdoor side by rotating the plug 6 inserted in the cylinder case 5;
The deadbolt operation unit 1 can be restrained by an operation from the outside, the restraint state is maintained in the locked state of the cylinder lock 7, and the deadbolt operation unit is operated by the operation of the genuine unlocking key 8 to the cylinder lock 7. This is achieved by providing a door locking device having a lock restraining body 9 in which the restraint to 1 is released.

  In order to operate the deadbolt, the lock body 3 is provided with a deadbolt operating portion 1 which is rotated by a cylinder lock 7 from the outdoor side and rotated by a thumb turn device 4 from the indoor side. The operation is added and the unlocking operation is performed.

  The lock restraining body 9 can be operated from the outdoor side to restrain the deadbolt operation unit 1. In the restrained state, the operation using the thumb turn device 4 is also impossible. Unlocking operations due to unauthorized access can be reliably prevented.

  The lock restraining body 9 can be provided on either the cylinder lock 7 or the lock body 3. When the cylinder lock 7 is provided, as will be described in detail later, the deadbolt operation unit 1 is indirectly restrained by locking a member that transmits the rotation operation to the plug 6 to the deadbolt operation unit 1. Composed. Further, when the lock restraining body 9 is arranged on the lock body 3 side, an appropriate rotation stopper for the deadbolt operation unit 1 or a stopper for the advance / retreat operation of the deadbolt may be provided in the lock body 3. In this case, an operation lever or the like for the lock restraining body 9 is disposed outside.

  For the operation from the outside to the lock restraining body 9, for example, a button or the like previously arranged on the door body 2 can be used, or the cylinder lock 7 can be used. The operation of the operation lever and the like by the cylinder lock 7 can utilize an appropriate operation such as a push operation of the plug 6 in addition to a rotation operation to the plug 6 in the cylinder lock 7.

  In order to prevent invalidation of the thumbturn device 4 due to mischief or the like, the maintenance of the restrained state by the lock restraint body 9 needs to correspond to the locked state of the cylinder lock 7. This can be easily achieved by providing a stopper portion for restricting the release operation of the operation lever or the like at the locking rotation position.

  Therefore, in the present invention, the lock main body 3 itself is locked by the operation to the cylinder lock 7 operated from the outside, and the unlocking operation cannot be performed even if the indoor thumb turn device 4 is used. Unauthorized access to the thumb turn device 4 can be completely prevented.

When the lock restraint body 9 is operated by rotating the cylinder lock 7 with respect to the plug 6,
The plug 6 can be rotated beyond the lock rotation position (PL) to the lock fixing rotation position (PF).
The lock restraining body 9 can be configured to perform a restraining operation as the plug 6 moves to the lock fixing rotation position and to release the restraint as the plug 6 moves to the unlocking rotation position side.

  If comprised in this way, since the action | operation of the lock restraint body 9 is made into conditions on rotation of the plug 6 from the locking rotation position (PL) to the lock fixing rotation position (PF) further overrun, It is possible to select a locked state that can be operated by the thumb turn device 4 and a locked state that cannot be operated by the thumb turn device 4. As a result, for example, when leaving a person in the room and leaving the room, if the door is kept in a normal locked state, the door opening / closing operation of the person who remains in the room can be performed in a normal state, so the usability does not deteriorate. . In this case, an emergency restraint release mechanism can be provided in the thumb turn device 4 in preparation for the case where the cylinder lock 7 is locked while the lock restraint body 9 is operating even though there is a person in the room. As the release mechanism, a mechanism that can be operated only from the indoor side and cannot be completely operated using a tool or the like from the outside is used.

The door lock device
A lock body portion 3 that includes a dead bolt that is advanced and retracted by a rotation operation to the dead bolt operation portion 1 and is fixed to the door body 2;
A thumb turn device 4 for operating the deadbolt operation unit 1 from the indoor side;
A door locking device having a cylinder lock 7 for operating the deadbolt operation unit 1 from the outdoor side,
The cylinder lock 7 is connected to the deadbolt operation unit 1 of the lock body 3 so as not to rotate freely, and holds a lock restraint body 9 holding a lock body 10 capable of entering a rotation boundary with the cylinder case 5;
In the cylinder case 5, the lock restraining body 9 is caused to follow by the rotational operation within the locking / unlocking rotation stroke centered on the neutral rotation position (PN) where the unlocking key 8 can be removed, and the dead bolt operating unit 1 A plug 6 that is unlocked and unlocked, and that allows the lock body 3 to be unlocked and unlocked by the thumb turn device 4 in the neutral rotational position (PN);
The plug 6 has a drive cam 11 that follows the plug 6 when the plug 6 is rotated beyond the locking side stroke end of the locking / unlocking rotation stroke, and pushes and holds the lock body 10 to the rotation boundary. be able to.

  In this case, the plug 6 can be operated within the locking / unlocking rotation stroke to operate the deadbolt operation unit 1, and when the locking / unlocking operation to the lock body unit 3 is completed, a predetermined idling region is used. Then, without operating the deadbolt operation unit 1, it is once returned to the neutral rotational position (PN) and the unlocking key 8 is removed. In the state where the unlocking key 8 is removed at the neutral rotational position (PN), the plug 6 cannot rotate with respect to the cylinder case 5, but between the plug 6 and the lock restraining body 9, there is a dead bolt operating portion. An idling range corresponding to the rotation stroke for locking / unlocking on the 1 side is set, and locking / unlocking operation to the lock body 3 from the thumb turn device 4 side is allowed.

  On the other hand, in the locked state in which the dead bolt of the lock main body 3 is popped out, the dead bolt operating unit 1 is at the end position of the rotation stroke in the locking direction, and further rotation operation in the same direction becomes impossible. In this state, when a rotational operation force is applied to the plug 6 beyond the locking rotation position (PL), the plug 6 is idled with respect to the lock restraining body 9 whose rotation is restrained by the deadbolt operation unit 1. Move to the lock fixing rotation position (PF). In the rotation range, the drive cam 11 follows the plug 6, and the lock body 10 held by the lock restraint body 9 is brought to the rotation boundary between the lock restraint body 9 and the cylinder case 5 by the rotation of the drive cam 11. Invaded and retained.

  Since the lock restraining body 9 is fixed to the cylinder case 5 by the movement of the lock body 10, the dead bolt operation using the thumb turn device 4 is impossible thereafter. Thereafter, when a rotational operation force in the unlocking rotation position direction is applied to the plug 6, the plug 6 is idled by pulling the drive cam 11 with respect to the locked lock restraining body 9, and the lock body 10 is locked. Evacuate inside. In this state, since the rotation boundary between the lock restraining body 9 and the cylinder case 5 is opened, the dead bolt due to the plug 6 in the difference range between the locking / unlocking stroke and the rotation stroke on the dead bolt operating unit 1 side will be described. Can be operated.

The door locking device includes:
A door cylinder lock 7 for rotating the deadbolt operation portion 1 of the lock body portion 3 to advance and retract the deadbolt of the lock body portion 3;
A lock restraining body 9 that is connected to the deadbolt operation portion 1 of the lock body portion 3 so as not to be idled and holds a lock body 10 that can enter the rotation boundary with the cylinder case 5;
A plug 6 having a predetermined idling angle in the cylinder case 5 and rotated so as to be able to follow the lock restraint body 9;
When the plug 6 is forcibly rotated while the lock restraining body 9 is restrained, the door cylinder lock 7 having a drive cam 11 that follows the plug 6 and pushes and holds the lock body 10 to the rotation boundary is provided. Can be used.

  Further, when the unlocking key 8 for rotating the plug 6 is configured to be able to be removed and inserted even at the end of the overstroke, the drive cam 11 and the rotor can be integrally formed. If the rotational position is not the position where the unlocking key 8 can be removed, the plug 6 is connected between the drive cam 11 and the plug 6 from the rotational position for locking (PF) to the unlocking key 8 insertion / removal position. An idling zone that allows idling is set.

  According to the present invention, by allowing the restraining operation of the thumb turn device from the outdoor side, it is possible to reliably prevent unauthorized unlocking due to the operation of the thumb turn device from the outside.

  As shown in FIG. 1, the door locking device includes a lock main body portion 3 accommodated in the door body 2, a thumb turn device 4 disposed on the indoor side wall surface of the door body 2, and the outdoor side wall surface of the door body 2. And a cylinder lock 7 disposed on the surface.

  The lock body 3 is formed by accommodating a dead bolt (not shown) in the lock case 3a. As shown in FIG. 1 (b), the lock body 3 is provided with a dead bolt operating portion 1, and the dead bolt is rotated by rotating the dead bolt operating portion 1 with a predetermined rotation stroke (90 ° in the illustrated example). The bolt is advanced and retracted to a strike (not shown) fixed to the door frame side, and the door body 2 is locked and unlocked.

  The thumb-turn device 4 has a thumb-turn shaft 4a that is fitted to the dead bolt operation unit 1 so as not to idle. An operation knob 4b is connected to the thumb turn shaft 4a, and the dead bolt can be operated by rotating the operation knob 4b.

The cylinder lock 7 is inserted into the cylinder case 5 and has a plug 6 that can be rotated relative to the cylinder case 5 only when the genuine unlocking key 8 is inserted into the key insertion groove 6a.
As shown in FIG. 2A, a drive cam 11 is connected to the end of the plug 6. The drive cam 11 has a stepped cylindrical shape with a small diameter on the free end side, that is, the thumb turn device 4 side, and a joint 6b protruding from the end surface of the plug 6 rotates on the end surface of the large diameter portion 11a. A joint receiving recess 11b that is freely fitted is provided. The joint receiving recess 11b is provided with a driving protrusion 12 that protrudes into the rotation region of the joint 6b in order to cause the drive cam 11 to follow the rotation of the plug 6. A predetermined idling range is set between the plug 6 and the driving cam 11 so that the driving cam 11 rotates only when the plug 6 is rotated beyond the idling range.

  Further, as shown in FIG. 2C, a pair of lock ball receiving recesses 13 are formed at point symmetry positions on the outer peripheral wall of the large diameter portion 11 a of the drive cam 11. On the other hand, a pair of stopper portions 14 composed of three continuous recesses 14a, 14b, 14c is formed at a position rotated by 90 °. Further, a click ball receiving hole 15 is formed in the outer peripheral wall of the small diameter portion 11c of the drive cam 11, and the click ball 16 urged in the protruding direction by the compression spring 16a is inserted.

  A lock restraining body 9 is connected to the drive cam 11 configured as described above. The lock restraining body 9 has a fitting projection 9b fitted non-rotatably on the dead bolt operating portion 1 from the large-diameter ring portion 9a rotatably fitted to the large-diameter portion 11a of the drive cam 11 toward the distal end. It is formed by protruding. The lock restraining body 9 is mounted by rotatably fitting a large-diameter ring portion 9 a into a restraining body accommodating recess 5 a formed in the cylinder case 5, and a stopper plate 17 fixed to the cylinder case 5. Omission from 5 is prevented. Four lock ball fitting recesses 18 are provided in the inner peripheral wall of the restraining member housing recess 5a of the cylinder case 5 at intervals of 90 °.

  In addition, a pair of lock ball holding grooves 19 are formed at a point-symmetrical position in the large-diameter ring portion 9a of the lock restraining body 9, and the spherical lock body 10 is accommodated. Further, an arcuate protrusion 20 that can be engaged with recesses 14a, 14b, and 14c formed on the drive cam 11 side is provided on the sliding wall surface of the large-diameter ring portion 9a with the drive cam 11. The lock ball holding groove 19 and the arcuate protrusion 20 are provided at positions rotated by 90 ° relative to each other. As shown in FIG. 2 (c), the lock ball holding groove 19, that is, the lock body 10 is provided in the cylinder case. The arcuate protrusion 20 engages with the central concave portion 14 b of the stopper portion 14 in a state of facing the five lock ball fitting concave portions 18.

  On the other hand, a pair of click ball engaging recesses 21 are formed at point-symmetrical positions on the inner peripheral wall of the fitting protrusion 9b of the lock restraining body 9, that is, the sliding contact wall with the narrow diameter portion 11c of the drive cam 11. Is done. As shown in FIG. 2D, the click ball engaging recess 21 is formed at a position facing the click ball receiving hole 15 with the arcuate protrusion 20 engaged with the central recess 14b.

  The operation of the door locking device configured as described above will be described. First, FIG. 2 shows a state in which the lock body 3 is unlocked, that is, a dead bolt is accommodated in the lock case 3a and the plug 6 is in a neutral rotational position (PN). At the neutral rotational position (PN) of the plug 6, as shown in FIG. 2B, the key insertion groove 6a of the plug 6 is in a vertical position, and as shown in FIG. 2C, the joint 6b of the plug 6 is It becomes a horizontal posture. The lock body 10 and the like maintain the above-described relative positional relationship, and the lock restraining body 9 and the drive cam 11 engage the click ball with the click ball engagement recess 21 and the recess 14b of the arcuate protrusion 20. Are coupled in the rotational direction.

  In this state, when the thumb turn device 4 is rotated in the locking direction, the lock restraining body 9 is given a rotating operation force in the clockwise direction in FIG. On the other hand, when the lock body 10 is held in the lock ball holding groove 19 of the lock restraint body 9 and can be rotated relative to the cylinder case 5, the lock body 10 falls into the lock ball fitting recess 18 that faces the lock body 10. Even so, when a rotational operation force is applied to the lock restraining body 9, the lock body 10 can be moved into the lock hole holding groove, so that the rotation possibility of the lock restraining body 9 is maintained.

  In contrast, the plug 6 cannot rotate with the unlocking key 8 removed, but the gap between the joint 6b of the plug 6 and the driving projection 12 of the driving cam 11 is shown in FIG. As described above, since the idle rotation range in the clockwise direction of the lock restraint body 9 is set, the lock restraint body 9 can rotate in this direction, and the locking operation by the thumb turn device 4 is guaranteed.

  When the plug 6 is rotated in the locking direction by the unlocking key 8 from this state, the joint 6b of the plug 6 comes into contact with the driving projection 12 of the driving cam 11 to rotate the driving cam 11 to the locking rotation position (PL) side. Let As described above, since the drive cam 11 and the lock restraining body 9 are connected in the rotational direction, the lock restraining body 9 also rotates to the locking rotation position (PL) side as the drive cam 11 rotates. 3 (a) and 3 (b), the dead bolt operating portion 1 of the lock body 3 is operated from the unlocked state shown in FIG. 1 (b) to the locked state side (θ). And the dead bolt protrudes from the lock case 3a.

  In this state, when the plug 6 is rotated again to the neutral rotation position (PN) and the unlocking key 8 is removed, the state shown in FIGS. 3C and 3D is obtained. In the neutral position of the plug 6 in the locked state, the lock restraining body 9 rotates in the unlocking direction (counterclockwise direction) between the plug 6 and the drive cam 11 and the lock restraining body 9 connected thereto. Since the idling area for performing the operation is arranged, the unlocking operation to the lock body 3 using the thumb turn device 4 is guaranteed.

  As described above, by rotating the plug 6 within the locking / unlocking stroke centered on the neutral rotation position (PN), the thumb turn can be performed regardless of the state of the lock main body 3 just like a normal locking device. The lock body part 3 can be locked and unlocked from the room side using the device 4.

  Next, FIG. 4 shows the operation when the plug 6 is overstroked from the locking side stroke end of the locking / unlocking stroke to the lock fixing rotation position (PF). The rotational operation force applied to the plug 6 in the lock fixing rotational position (PF) direction is transmitted to the drive cam 11 via the contact portion between the joint 6 b and the drive projection 12. On the other hand, when the lock main body 3 is in the locked state, the dead bolt operating portion 1 cannot rotate in the locking direction and cannot rotate the lock restraining body 9. The relative movement force is added to the connection interface. As a result, as shown in FIG. 4B, the engagement between the arcuate protrusion 20 of the lock restraining body 9 and the recess 14b is released with elastic deformation of either one or both, and further, FIG. As shown in c), the click ball 16 engaged with the click ball engaging recess 21 of the drive cam 11 receives the component force from the wall surface of the click ball engaging recess 21 and receives the click ball of the lock restraining body 9. Retreat into the accommodation hole 15.

  In this state, the connection between the drive cam 11 and the lock restraining body 9 is released, and the drive cam 11 driven by the plug 6 is a recess 14a positioned at the end of the stopper portion 14 as shown in FIG. The arcuate protrusion 20 rotates relative to the lock restraint body 9 until it is elastically engaged again. When the drive cam 11 rotates relative to the lock restraining body 9, the lock body 10 fitted in the lock ball receiving recess 13 of the drive cam 11 is pushed outward from the lock ball receiving recess 13. It receives the component force and moves to the lock ball fitting recess 18 of the cylinder case 5 which has been directly opposed at the locking rotation position (PL).

  As shown in FIG. 4B, the lock body 10 fitted in the lock ball fitting recess 18 closes the sliding boundary surface between the lock restraining body 9 and the cylinder case 5, and the drive cam 11 is fixed. When rotating to a position corresponding to the rotational position, the retraction of the lock body 10 from the boundary surface is also hindered by the outer peripheral wall surface of the drive cam 11 and remains at the boundary surface closed position. After that, as shown in FIGS. 4D and 4E, when the plug 6 is returned to the neutral rotational position (PN) by using the idling region and the unlocking key 8 is removed, the lock restraining body 9 is thereafter moved. It becomes impossible to rotate, and the unlocking operation to the lock body 3 using the thumb turn device 4 becomes impossible.

  When the plug 6 is rotated in the unlocking direction from the state in which the lock restraint 9 is restrained and the plug 6 is in the neutral rotational position (PN), the lock restraint 9 and the plug 6 are restrained from rotating. A force in the direction opposite to that described above is applied to the rotational boundary with the drive cam 11 to which the rotational operation force is applied. As a result, as shown in FIG. 5A, the lock body 10 falls again into the lock ball housing recess 13 of the drive cam 11, and the lock body 10 blocks the rotational boundary surface between the lock restraining body 9 and the cylinder case 5. After that, the unlocking operation to the lock body 3 can be performed as shown in FIG.

  If the locking device used in the above description is wrong, the states of FIGS. 6 (a) and 6 (b) correspond to the states of FIGS. The reason why two pairs of the concavity 18 and the click ball fitting concavity are formed is to cope with these differences.

It is a figure which shows this invention, (a) is sectional drawing which shows the state fixed to the door body, (b) is a figure of the dead-bolt operation part vicinity which looked at the lock body part from the arrow 1B direction in FIG. 1 (a). is there. 1A and 1B are views showing an essential part of FIG. 1, in which FIG. 2A is an enlarged cross-sectional view of a front end portion of a cylinder lock, FIG. 2B is a cross-sectional view taken along line 2B-2B in FIG. FIG. 2D is a cross-sectional view taken along line 2C-2C, and FIG. 2D is a cross-sectional view taken along line 2D-2D in FIG. It is a figure which shows locking operation, (a) is a figure corresponding to FIG.2 (b) which shows the state which rotated the plug to the locking rotation position, (b) is a figure corresponding to FIG.2 (c), (c). FIG. 2D is a view corresponding to FIG. 2D, and FIG. 2D is a cross-sectional view taken along line 2C-2C in FIG. 2A showing a state where the plug is returned to the neutral rotation position. It is a figure which shows the state which rotated the plug to the rotation position for lock fixation, (a) is a figure corresponding to FIG.2 (b), (b) is a figure corresponding to FIG.2 (c), (c) is a figure. 2D is a diagram corresponding to 2D, FIG. 2D is a cross-sectional view taken along the line 2B-2B in FIG. 2A showing a state where the plug is returned to the neutral rotation position, and FIG. 2E is a state where the plug is returned to the neutral rotation position. FIG. 2 is a cross-sectional view taken along line 2C-2C of FIG. FIGS. 4A and 4B are diagrams illustrating a constraint release operation of the lock restraint body, in which FIG. 2A corresponds to FIG. 4E, and FIG. It is 2C sectional view. 2A is a cross-sectional view taken along the line 2C-2C in FIG. 2A at the lock fixing rotation position, and FIG. 2B is a cross-sectional view of 2D-2D in FIG. It is line sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Deadbolt operation part 2 Door body 3 Lock body part 4 Thumb turn device 5 Cylinder case 6 Plug 7 Cylinder lock 8 Unlock key 9 Lock restraint body 10 Lock body 11 Drive cam

Claims (5)

A dead bolt that is advanced and retracted by a rotation operation to the dead bolt operation part, and a lock body part fixed to the door body,
A thumb turn device for operating the deadbolt operation section from the indoor side;
A cylinder lock for operating the dead bolt operating portion from the outdoor side by rotating the plug inserted into the cylinder case;
The deadbolt operation unit can be restrained by an operation from outside, the restraint state is maintained in the locked state of the cylinder lock, and the deadbolt operation unit is restrained by the operation of the cylinder lock with a genuine unlocking key. A door locking device having a lock restraint body to be released. The plug can be rotated to a lock fixing rotation position beyond the lock rotation position,
The door locking device according to claim 1, wherein the lock restraining body performs a restraining operation as the plug moves to the lock fixing rotation position, and is released as the plug moves toward the unlocking rotation position. A dead bolt that is advanced and retracted by a rotation operation to the dead bolt operation part, and a lock body part fixed to the door body,
A thumb turn device for operating the deadbolt operation section from the indoor side;
A door locking device having a cylinder lock for operating the deadbolt operation part from the outdoor side,
The cylinder lock is connected to the dead bolt operation part of the lock body part so as not to idle, and a lock restraint body holding a lock body capable of entering the rotation boundary with the cylinder case,
In the cylinder case, the lock restraint body is caused to follow by a rotation operation within a locking / unlocking rotation stroke centered on a neutral rotation position where the unlocking key can be removed, and the unlocking operation to the dead bolt operation unit is performed. A plug that allows the locking and unlocking operation of the lock body by the thumb turn device in the neutral rotation position;
A door lock configured to have a drive cam that follows the plug when the plug is rotated beyond the locking side stroke end of the locking / unlocking rotation stroke, and pushes the lock body to the rotation boundary and holds it. apparatus. Rotating the dead bolt operation part of the lock body part, and a cylinder lock for the door that performs the advance / retreat operation of the dead bolt of the lock body part,
A lock restraint body that is connected to the dead bolt operation part of the lock body part so as not to idle and holds a lock body that can enter the rotation boundary with the cylinder case,
A plug that is rotated within the cylinder case so as to be able to follow the lock restraint body with a predetermined idling angle;
A cylinder lock for a door having a drive cam that follows the plug when the plug is forcibly rotated in a state in which the lock restraining body is restrained, and pushes and holds the lock body to the rotation boundary. The plug can be inserted and removed from the unlocking key at a rotational position other than the rotational position for locking the lock,
5. The door cylinder lock according to claim 4, wherein an idling region is set between the plug and the drive cam to allow idling from the rotation position side for locking the plug to the unlocking key insertion / removal position.

Images