JP4006488B2 - Locking and unlocking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking / unlocking device that can be suitably used for an entrance door or the like, and more specifically, includes a cylinder lock that locks / unlocks by inserting a key on the outside of the door, and a cylinder lock on the indoor side of the door. It is related with improvement of the locking / unlocking device provided with the thumb turn (manual operation part) which performs locking / unlocking in conjunction with.
[0002]
[Prior art]
This type of locking and unlocking device can lock the door to the closed position by inserting a key into the cylinder lock from the outside of the door and turning it, and by turning the thumb turn in the room. it can.
[0003]
However, for example, in the case of a door provided with a light window, there is a drawback that the thumb turn can be easily turned if the window is broken and a hand is put inside.
[0004]
Therefore, it is known that the thumb turn can be extracted after locking by fitting the thumb turn into an insert member formed in the case of the locking / unlocking device so as to be insertable / removable.
[0005]
However, in this case, there is a possibility that the thumb turn may be accidentally dropped and lost due to impact or vibration when the door is opened and closed.
Also, if the thumb turn and the operation shaft inside the case have a simple shape, even if the thumb turn is removed after locking, insert a thumb turn or tool with a similar shape from the case insertion port, and engage with the operation shaft. When combined, there is a disadvantage that unlocking is possible.
[0006]
On the other hand, it is also known that a cylinder lock interlocking with a cylinder lock on the outdoor side is provided on the indoor side of the door, and a key is inserted into the cylinder lock on the indoor side for locking and unlocking.
However, in the case of such a configuration, since it is necessary to provide cylinder locks both indoors and outdoors, there are disadvantages that the structure becomes complicated and large, and that it becomes expensive.
[0007]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a locking / unlocking device that has a simple structure and can be manufactured at low cost, and that is compact and excellent in crime prevention.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, as a first aspect of the present invention, a cylinder lock that can be locked / unlocked by inserting a key outside the door is provided as a first invention. A locking / unlocking device having an operation unit capable of locking operation, a case provided on the indoor side of the door, one end portion is located inside the case, and the door lock member is locked and unlocked by rotation. A shaft member that can be moved into the case, and an operation shaft that can be inserted into an insertion port formed in the case and can be fitted to one end of the shaft member, and on the outer periphery of the operation shaft a thumb turn with engagement groove formed along, with while being rotatably supported by a shaft support between the casing and the shaft member in a direction to shield the insertion opening by a biasing member is energized, the other end side remote from the shaft support Shutter operating shaft of the thumb is provided with the engaging portion engageable with the engagement groove when fitted to the shaft member, and a protruding portion for coupling at one end to the vicinity of the shaft support And an engaging recess connected to the protruding portion of the shutter at one end and the other end protruding to the outside of the case. And an operation member that rotates the shutter against the urging force of the urging member.
[0009]
In the locking / unlocking device having the above configuration, when the operating shaft of the thumb turn is fitted to one end of the shaft member inside the case, the shutter receives the urging force of the urging member and engages the outer periphery of the operating shaft of the thumb turn. Since it is engaged with the groove, it is possible to prevent the thumb turn from being accidentally dropped.
[0010]
Also, operating the operation member from the outside of the case Then, through the connection portion between the protruding portion of the engagement recess and the shutter of the operating member, the shutter is rotated against the biasing force of the biasing member, the engagement of the shutter Since the part disengages from the engaging groove on the outer periphery of the operating shaft of the thumb turn, the thumb turn can be extracted from the insertion port of the case.
[0011]
Moreover, after removing the thumb turn, when the hand is released from the operation member, the shutter rotates by receiving the urging force of the urging member and can close the case insertion port. Etc. can be reliably prevented from being inserted. Therefore, it is possible to provide a locking / unlocking device with excellent crime prevention.
[0012]
Moreover, according to the above configuration, since the shutter is pivotally supported in the case and rotated, it is compact inside the case even if it is necessary to ensure a large movement stroke for shielding the case insertion port. Can be accommodated. Therefore, the enlargement of the whole locking / unlocking device can be prevented.
[0013]
Further, since the operation member is connected to the vicinity of the shaft support portion of the shutter, and the shutter can be moved greatly by a slight movement of the operation member, the amount of protrusion of the operation member to the outside of the case can be reduced.
Accordingly, the entire locking / unlocking device can be reduced in size, and the operation member can be made inconspicuous from the outside, so that the crime prevention can be further improved.
[0014]
Furthermore, as a second invention, in the locking and unlocking device according to the first invention, the operation member is provided movably in a direction perpendicular to the axis of the shaft member with respect to the outer periphery of one end of the shaft member, and the shaft A groove is provided at a predetermined position on the outer periphery of one end of the member. When the shutter is engaged with the engagement groove on the outer periphery of the operation shaft of the thumb turn, the outer end of the groove is formed on the one end of the operation member. In addition, a thumb turn device is provided that is provided with a convex portion that can enter the concave groove when the shaft member is at a predetermined rotation angle position.
[0015]
In the locking / unlocking device having the above-described configuration, when the shutter is engaged with the engagement groove on the outer periphery of the thumb turn operating shaft, that is, when the thumb turn operating shaft is fitted to one end of the shaft member inside the case. Since the convex portion of the operation member is located outside the concave groove provided at a predetermined position on the outer periphery of the one end portion of the shaft member, the rotation of the shaft member can be allowed freely.
[0016]
Further, when extracting the thumb turn, if the shaft member is rotated to a predetermined position, for example, a locked position or an unlocked position by the thumb turn, the convex portion of the operating member can enter the concave groove on the outer periphery of the one end portion of the shaft member. As a result, the shutter can be rotated against the urging force of the urging member by pushing the operating member from the outside of the case until the convex portion of the operating member enters the groove of the shaft member. Become.
As a result, the shutter can be detached from the engaging groove on the outer periphery of the operating shaft of the thumb turn, whereby the thumb turn can be extracted from the insertion port of the case.
[0017]
Also, when the thumb turn is extracted and the shutter moves to a position that closes the insertion slot of the case, the convex portion of the operation member moves to a position away from the concave groove on the outer periphery of one end of the shaft member. After that, the shaft member can freely rotate.
Therefore, the lock / unlock operation can be performed without any trouble by inserting the key into the cylinder lock outside the door.
[0018]
On the other hand, when the shaft member is in a rotation position other than the predetermined position, the position of the groove on the outer periphery of the one end of the shaft member is displaced from the movement path of the convex portion of the operation member. Even if pushed in, the convex portion of the operating member cannot enter the concave groove on the outer periphery of the one end portion of the shaft member.
For this reason, the shutter cannot be detached from the engaging groove on the outer periphery of the operating shaft of the thumb turn by the operating member.
[0019]
In this way, since the rotation position of the shaft member when inserting and removing the thumb turn can be restricted to a predetermined position, when the thumb turn is extracted, it is easy to ensure that the shaft member is at the predetermined rotation position. It will be visible, and crime prevention will be further improved.
[0020]
Further, as a third invention, a cylinder lock that can be locked and unlocked by inserting a key on the outdoor side of the door, an operation unit that can be locked and unlocked in conjunction with the cylinder lock on the indoor side of the door,
A case provided on the indoor side of the door, a shaft member whose one end is located inside the case and capable of moving the door lock member to a locked position and an unlocked position by rotation;
It has an operation shaft that can be inserted into an insertion port formed in the case, can be fitted to one end of the shaft member, and has an engagement groove formed along the outer periphery of the operation shaft. The thumb turn is pivotally supported between the case and the shaft member and is urged in a direction to shield the insertion port by the urging member, and the operation shaft of the thumb turn is fitted to the shaft member A shutter having an engaging portion engageable with the engaging groove, and one end connected to the vicinity of the shaft support portion of the shutter, and the other end protruded to the outside of the case. An operation member that rotates against an urging force of the urging member, and moves the operation member in a direction perpendicular to the axis of the shaft member with respect to the outer periphery of one end of the shaft member It is possible to provide an outer periphery of one end of the shaft member. When the shutter is engaged with the engaging groove on the outer periphery of the operating shaft of the thumb turn, the one end of the operating member is positioned outside the recessed groove and the shaft A thumb turn device is provided , characterized in that a convex portion is provided which can enter the concave groove when the member is at a predetermined rotational angle position .
[0021]
The thumb turn device according to the third aspect of the invention has a function achieved by the convex portion provided on the operation member and the concave groove provided on the shaft member in addition to the crime prevention function by the shutter and the operation member, that is, the thumb turn is extracted. Crime prevention can be further improved by making it possible to easily recognize the pivot position of the shaft member.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 to FIG. 6 show an embodiment of the present invention, and FIG. 1 is a vertical sectional side view of an essential part of a main part of a locking / unlocking apparatus.
2 is a vertical cross-sectional side view of the main part showing a state where the locking / unlocking apparatus shown in FIG. 1 is attached to the door, and FIG. 3 is a vertical cross-sectional view of the main part showing a state where the thumb turn of the locking / unlocking apparatus shown in FIG. It is.
[0023]
4 (a) is a front view of a shaft member used in the locking and unlocking apparatus shown in FIG. 1, FIG. 4 (b) is a side view of the coaxial member, and FIG. 4 (c) is a line 4c-4c in FIG. 4 (a). FIG. 4D is a cross-sectional view taken along line 4d-4d in FIG. 4A.
[0024]
FIG. 5 is a rear view showing a state where main parts are assembled to the case of the locking / unlocking device shown in FIG. 1, and FIGS. 6 (a), (b), (c), (d), and (e) are diagrams. It is a front view inside a case which shows operation | movement of the shutter and operation member of the locking / unlocking apparatus shown in FIG.
[0025]
First, referring to FIG. 1 and FIG. 2, the locking / unlocking device of this embodiment includes a mounting plate 11 attached to the indoor side of the door 10, and the mounting plate 11 covers a case 12 covering the entire mounting plate 11. Is screwed.
[0026]
A lock device 14 having a lock member 15 that can protrude from the side end surface is incorporated inside the door 10, and the lock device 14 moves the lock member 15 to a lock position and an unlock position. The shaft member 16 is connected.
[0027]
The shaft member 16 extends in the thickness direction of the door 10, and one end portion of the shaft member 16 is located in the case 12, and the other end portion is attached to the mounting plate 11 via a shaft member head 17 attached to the other end portion. Is rotatably supported.
[0028]
A cylinder lock 18 is provided outside the door 10 so that a key can be inserted to turn the turning portion. The turning portion of the cylinder lock 18 is connected to the shaft member 16. Yes.
Therefore, the lock member 15 of the lock device 14 can be moved between the lock position and the unlock position by inserting the key into the cylinder lock 18 and turning it.
[0029]
As is more apparent from FIG. 3, the locking / unlocking device includes a thumb turn 19 that can be connected to one end of the shaft member 16 in the case 12.
The thumb turn 19 has a knob portion 20 and an operation shaft 21 that protrudes rearward from the central portion of the back surface, and a tooth profile portion 22 is formed on the outer periphery of the tip end portion of the operation shaft 21.
Further, an annular engagement groove 23 extending over the entire circumference is formed on the outer circumference of the operation shaft 21 between the tooth profile portion 22 and the knob portion 20.
[0030]
As shown in FIG. 4, a connecting portion 25 having a larger diameter than the shaft main body portion 24 of the shaft member 16 is formed at one end portion of the shaft member 16, and between the connecting portion 25 and the shaft main body portion 24. A substantially circular flange portion 26 is integrally formed.
One end face of the shaft member 16, that is, the end face of the connecting portion 25 is formed with a fitting hole 27 having a tooth shape that meshes with the outer peripheral tooth shape portion 22 of the operation shaft 21 on the inner peripheral surface.
[0031]
A gap having a predetermined width is secured between the end surface of the connecting portion 25 and the inner surface of the case 12, and the engagement groove 23 of the operation shaft 21 of the thumb turn 19 is fitted to the shaft member 16. When fitted in the hole 27, it is located in the gap between the inner surface of the case 12 and the end surface of the connecting portion 25.
[0032]
An insertion port 28 is formed on the front wall of the case 12 coaxially with the axis of the shaft member 16, and the thumb turn 19 can insert the operation shaft 21 from the insertion port 28 of the case 12 into the case 12. The outer peripheral tooth profile 22 at the tip of the operation shaft 21 can be fitted to the fitting hole 27 of the shaft member 16 so as to be insertable / removable.
[0033]
When the operating shaft 21 of the thumb turn 19 is fitted into the fitting hole 27 of the shaft member 16, the thumb turn 19 rotates integrally with the shaft member 16.
Therefore, when the thumb turn 19 is rotated in a state where the operation shaft 21 of the thumb turn 19 is fitted in the fitting hole 27 of the shaft member 16, the lock member 15 of the lock device 14 is unlocked and unlocked via the shaft member 16. It can be moved to the locked position.
[0034]
Furthermore, as shown in FIG. 1, in this embodiment, a drive device 30 that is locked and unlocked by an electrical signal is provided inside the case 12.
Although detailed description is omitted, the drive device 30 includes a motor and a speed reduction mechanism provided inside the casing 31, and an output shaft of the speed reduction mechanism is connected to the shaft member 16 via the clutch mechanism 32. Yes.
Therefore, the motor can be driven by giving a signal to the driving device 30 from the outside, and the shaft member 16 can be rotated via the clutch mechanism 32 by the output.
[0035]
As shown in FIG. 5, a support shaft 33 is provided on the inner surface of the case 12. The support shaft 33 includes an inner surface of the front wall of the case 12 and one end portion of the shaft member 16, that is, an end surface of the connecting portion 25. A base end portion of the shutter 34 positioned between the two is pivotally supported so as to be rotatable.
Further, the shutter 34 is urged in a direction to close the insertion port 28 of the case 12 by a spring 35 as an urging member attached to the support shaft 33.
On the inner surface of the case 12, there is provided a stopper 36 that abuts the tip of the shutter 34 at a position where the shutter 34 closes the insertion port 28 and restricts the movement stroke of the shutter 34.
[0036]
Further, the shutter 34 is an engaging portion that can be engaged with the engaging groove 23 on the outer periphery of the operating shaft 21 when the operating shaft 21 of the thumb turn 19 is in a position to be fitted in the fitting hole 27 of the shaft member 16. 37.
[0037]
2 and 3, one end is connected to the shutter 34 between the inner surface of the front wall of the case 12 and one end of the shaft member 16, that is, the end surface of the connecting portion 25. An operation member 38 whose end protrudes outside the case 12 is provided.
[0038]
As shown in FIG. 5, the operation member 38 is guided in a direction parallel to the inner wall surface of the door 10, more preferably in a direction orthogonal to the axis of the shaft member 16 by the guide portion 39 provided on the inner surface of the case 12. It is designed to be movable.
[0039]
With this operation member 38, the shutter 34 can be rotated in the opening direction from the position where the insertion port 28 of the case 12 is closed against the urging force of the spring 35.
[0040]
More specifically, an engagement recess 40 is formed on one side of the operation member 38, and a projection 41 that protrudes from the base end of the shutter 34 and engages with the engagement recess 40 is formed. Is provided.
Preferably, the protrusion 41 is engaged with the engagement recess 40 of the operation member 38 in the vicinity of the support shaft 33, and the engagement portion 37 of the shutter 34 is more distant from the support shaft 33 than the protrusion 41. It is formed at a distant position.
[0041]
Therefore, it is possible to give a large movement stroke to the shutter 34 by a slight movement amount of the operation member 38.
Further, the other end of the operation member 38 protrudes outward and downward from a lower portion near the front surface of the case 12.
[0042]
Furthermore, in this embodiment, as shown in FIG. 4, a concave groove 42 is provided at a predetermined position on the outer periphery of the end portion of the shaft member 16, that is, on the outer periphery of the connecting portion 25.
On the other hand, a convex portion 43 is provided at one upper end portion of the operation member 38. When the shutter 34 is engaged with the engagement groove 23 on the outer periphery of the operation shaft 21 of the thumb turn 19, The shaft member 16 is positioned outside the concave groove 42 and is formed so as to be able to enter the concave groove 42 when the shaft member 16 is at a predetermined rotation angle position, for example, an unlocked position or a locked position.
[0043]
If the pivot position of the shaft member 16 when the convex portion 43 is engaged with the concave groove 42 is made to correspond to the locking position and the unlocking position, two concave grooves 42 are provided on the outer periphery of the connecting portion 25. Although it is sufficient, there are a case where the rotation direction when unlocking is a clockwise direction and a case of a counterclockwise direction. Therefore, the shaft member 16 in this embodiment is a common component for both directions of rotation. In order to be usable, three concave grooves 42 are formed on the outer peripheral surface of the connecting portion 25 at a pitch interval of about ¼ arc.
[0044]
Further, as shown in FIGS. 1 to 3, a spacer 44 is disposed between the shaft member 16 and the shutter 34, and this spacer 44 is located between the spacer 44 and the flange portion 26 of the shaft member 16. It is urged toward the inner surface of the front wall of the case 12 by a spring 45 interposed therebetween.
The shutter 34 and the operation member 38 are sandwiched between the front wall of the case 12 and the spacer 44 by an appropriate biasing force of the spring 45 and are held in a state free from backlash in the axial direction.
[0045]
Next, the operation of the locking / unlocking apparatus having the above configuration will be described mainly with reference to FIG.
As shown in FIG. 2, when the operation shaft 21 of the thumb turn 19 is fitted in the fitting hole 27 of the shaft member 16 inside the case 12, as shown in FIG. Since the spring 35 (see FIG. 5) receives the urging force and engages with the engaging groove 23 on the outer periphery of the operating shaft 21 of the thumb turn 19, it is possible to prevent the thumb turn 19 from accidentally falling off.
On the other hand, since the convex portion 43 of the operation member 38 is located outside the concave groove 42 formed on the outer peripheral surface of the coupling portion 25 of the shaft member 16 at this time, the shaft member 16 can freely rotate. Can do.
[0046]
Next, when the thumb turn 19 is rotated by a predetermined angle in order to unlock or lock the locking device 15, one of the three concave grooves 42 formed on the outer periphery of the connecting portion 25 of the shaft member 16 is operated. Since it moves to a position where it can engage with the convex portion 43 of the member 38, as shown in FIG. 6B, the operating member 38 is pressed from the outside of the case 12, and the convex portion 43 engages with the concave groove 42. When the shutter 34 is moved to the position, the shutter 34 rotates against the urging force of the spring 35, whereby the engaging portion 37 of the shutter 34 is separated from the outer peripheral engaging groove 23 of the operating shaft 21 of the thumb turn 19. The 19 operation shafts 21 can be pulled out of the case 12 from the insertion opening 28 of the case 12.
[0047]
Then, after the thumb turn 19 is extracted, when the hand is released from the operation member 38, the shutter 34 receives the urging force of the spring 35 as shown in FIG. Rotate.
At this time, since the insertion port 28 of the case 12 can be completely closed by the shutter 34, it is possible to reliably prevent a tool or the like from being illegally inserted from the insertion port 28 of the case 12.
[0048]
When the thumb turn 19 is removed, as shown in FIG. 6 (c), the operation member 38 protrudes outside the case 12, and the convex portion 43 of the operation member 38 is connected to the shaft member 16. Since it is away from the concave groove 42 on the outer periphery of the portion 25, the shaft member 16 can freely rotate.
[0049]
Therefore, when going out, the thumb turn 19 can be unlocked, the thumb turn 19 can be removed, the door 10 can be opened, the door 10 can be closed, the key can be inserted into the cylinder lock 18 and locked. .
Further, even when the thumb turn 19 is rotated and locked in the room and the thumb turn 19 is removed, it is convenient because the key can be inserted into the cylinder lock 18 from the outside and unlocked.
[0050]
In addition, as shown in FIG. 6D, when the shaft member 16 is rotated to a position other than a predetermined position by the thumb turn 19, for example, to an intermediate position between the unlocking position and the locking position, the connecting portion 25 of the shaft member 16 Since the concave groove 42 is at an angular position where it does not engage with the convex portion 43 of the operating member 38, when the operating member 38 is pushed from the outside of the case 12, the convex portion 43 comes into contact with the outer peripheral surface of the connecting portion 25 and stops. The shutter 34 cannot be reliably rotated to the open position, and the engagement portion 37 is maintained at the position where the engagement portion 37 is engaged with the engagement groove 23 of the operation shaft 21.
Therefore, the thumb turn 19 cannot be extracted.
[0051]
This means that when the thumb turn 19 is extracted, the shaft member 16 is in a predetermined position, for example, a locked position, an unlocked position, etc. Therefore, when the thumb turn 19 is not present, it is locked or unlocked. It can be easily visually recognized that it is in a state.
[0052]
Further, as shown in FIG. 6E, when the thumb turn 19 is removed, another thumb turn having a different shape of the operation shaft 21, for example, a thumb turn having no engagement groove 23 on the outer periphery of the operation shaft 21 is formed in the case 12. When the thumb turn operating shaft 21 can be fitted into the fitting hole 27 of the shaft member 16, the engaging portion 37 of the shutter 34 is connected to the engaging groove 23. Therefore, the convex portion 43 of the operation member 38 cannot be detached from the concave groove 42 of the connecting portion 25 of the shaft member 16 and is kept engaged with the concave groove 42.
For this reason, since the shaft member 16 cannot be turned in the thumb turn, it cannot be unlocked. Therefore, unlocking due to an illegal thumb turn can be prevented.
[0053]
Moreover, in the locking / unlocking device configured as described above, since the shutter 34 is pivotally supported in the case 12 and rotated, it is necessary to ensure a large movement stroke for shielding the insertion port 28 of the case 12. However, the case 12 can be accommodated in a compact manner. Therefore, the enlargement of the whole locking / unlocking device can be prevented.
[0054]
Further, as described above, the operation member 38 is connected to the vicinity of the shaft support portion of the shutter 34, and the shutter 34 can be moved largely by a slight movement of the operation member 38, so that the operation member to the outside of the case 12 can be moved. The amount of protrusion of 38 can be reduced.
Accordingly, the entire locking / unlocking device can be reduced in size, and the operation member 38 can be made inconspicuous from the outside, so that the crime prevention property can be further improved.
[0055]
Although the illustrated embodiment has been described above, the present invention is not limited only to the aspect of the above embodiment, and various changes can be made to the components within the scope described in the claims.
[0056]
For example, the fitting form between the thumb turn 19 and the shaft member 16 can be arbitrarily selected.
In addition to the cylinder lock and thumb turn, the locking / unlocking device of the above embodiment includes a drive device 30 that is driven by an electrical signal. However, the manual operation type unlocking is performed only by the cylinder lock and thumb turn. It goes without saying that the present invention can also be applied to a locking device.
[0057]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to provide a locking and unlocking device that is simple in structure and can be manufactured at low cost, and that is compact and excellent in crime prevention.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view of an essential part showing a state in which a locking / unlocking apparatus according to an embodiment of the present invention is disassembled.
2 is a longitudinal sectional side view of a main part showing a state where the locking / unlocking device shown in FIG. 1 is attached to a door. FIG.
FIG. 3 is a longitudinal sectional view of a main part showing a state in which a thumb turn of the locking / unlocking apparatus shown in FIG. 1 is extracted.
4A is a front view of a shaft member used in the locking / unlocking device shown in FIG. 1, FIG. 4B is a side view of the coaxial member, and FIG. 4C is a cross-sectional view taken along line 4c-4c in FIG. Partial sectional view, (d) is a sectional view taken along line 4d-4d in (a).
5 is a rear view showing a state where main parts are assembled to a case of the locking / unlocking apparatus shown in FIG. 1; FIG.
6 (a), (b), (c), (d), and (e) are front views of the inside of the case showing the operation of the shutter and the operation member of the locking and unlocking apparatus shown in FIG. 1, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Door 11 Mounting plate 12 Case 14 Locking device 15 Locking member 16 Shaft member 18 Cylinder lock 19 Thumb turn 20 Knob part 21 Operation shaft 23 Engaging groove 25 Connection part 27 Fitting hole 28 Insertion port 30 Driving device 32 Clutch mechanism 33 Support shaft Part 34 shutter 35 spring 37 engaging part 38 operating member 42 concave groove 43 convex part

Claims (3)

A locking / unlocking device having a cylinder lock that can be locked and unlocked by inserting a key outside the door, and having an operation unit that can be locked and unlocked in conjunction with the cylinder lock on the indoor side of the door,
A case provided on the indoor side of the door;
A shaft member whose one end is located inside the case and capable of moving the door lock member to a locked position and an unlocked position by rotation;
It has an operation shaft that can be inserted into an insertion port formed in the case, can be fitted to one end of the shaft member, and has an engagement groove formed along the outer periphery of the operation shaft. Samturn,
While being rotatably supported by a shaft support between the shaft member and the case, it is biased in a direction to shield the insertion opening by the urging member, the other end side remote from the shaft support In addition, an engaging portion that can be engaged with the engaging groove when the operating shaft of the thumb turn is fitted to the shaft member, and a connecting projection at one end near the shaft supporting portion are provided. Shutter,
It is disposed in the case so as to be movable in a direction orthogonal to the shaft member, and has an engaging recess connected to the protruding portion of the shutter at one end , and the other end protrudes outside the case, An operation member for rotating the shutter against the urging force of the urging member;
A locking / unlocking device comprising:   The locking / unlocking device according to claim 1, wherein the operation member is movably provided in a direction perpendicular to the axis of the shaft member with respect to the outer periphery of the one end of the shaft member, and is disposed at a predetermined position on the outer periphery of the one end of the shaft member. When the shutter is engaged with the engaging groove on the outer periphery of the operating shaft of the thumb turn, the one end of the operating member is positioned outside the recessed groove, and the shaft member is provided on the one end of the operating member. A thumb turn device characterized in that a convex portion is provided which can enter the concave groove at a predetermined rotational angle position. A cylinder lock that can be locked and unlocked by inserting a key outside the door;
An operation unit that can be locked and unlocked in conjunction with the cylinder lock on the indoor side of the door,
A case provided on the indoor side of the door;
A shaft member whose one end is located inside the case and capable of moving the door lock member to a locked position and an unlocked position by rotation;
It has an operation shaft that can be inserted into an insertion port formed in the case, can be fitted to one end of the shaft member, and has an engagement groove formed along the outer periphery of the operation shaft. Samturn,
The shaft is pivotally supported between the case and the shaft member, and is biased in a direction to shield the insertion port by a biasing member, and the operation shaft of the thumb turn is fitted to the shaft member. And a shutter having an engagement portion engageable with the engagement groove;
An unlocking / unlocking mechanism including one end connected to the vicinity of the shaft supporting portion of the shutter, and the other end protruding to the outside of the case to rotate the shutter against the urging force of the urging member. A device,
The operation member is provided so as to be movable in a direction orthogonal to the axis of the shaft member with respect to the outer periphery of one end of the shaft member,
A groove is provided at a predetermined position on the outer periphery of one end of the shaft member,
When the shutter is engaged with the engagement groove on the outer periphery of the operation shaft of the thumb turn, the one end portion of the operation member is positioned outside the concave groove, and the shaft member is at a predetermined rotation angle position. A thumb turn device characterized in that a convex portion is provided which can enter the concave groove .

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