JP2013147852A - Thumb-turn device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thumb-turn device capable of reducing a manufacturing cost without lowering resistance against fraudulent operations.SOLUTION: The thumb-turn device includes: a thumb-turn body 6 which is fixed to a door 4 freely rotatably holding a thumb-turn shaft 3 inside a thumb-turn case 2 including a thumb-turn mounting opening 1, and in which the thumb-turn shaft 3 is connected to a lock device 5 in the state of being fixed to the door 4; and a thumb-turn 8 which has a connecting projection part 7 insertable from the thumb-turn mounting opening 1 into the thumb-turn case 2, and is freely attachably and detachably mounted on the thumb-turn body 6. At a front end of the thumb-turn shaft 3, a cover member 10 which freely idles to the thumb-turn shaft 3 and has a fitting recess 9 to which the connecting projection part 7 can be fitted is arranged. Also, the thumb-turn shaft 3 and the cover member 10 are connected in a rotating direction when the thumb-turn 8 is mounted.

Description

  The present invention relates to a thumb turn device.

  As a thumb turn device fixed to a door in order to lock and unlock the lock device from the room without a lock key, a device described in Patent Document 1 is known.

  In this conventional example, the thumb turn device is formed by detachably connecting a detachable thumb turn to a thumb turn shaft that is rotatably mounted on the base, and transmits the rotational operation force applied to the removable thumb turn to the lock device via the thumb turn shaft. By doing so, it is configured to perform a locking / unlocking operation of the locking device.

  The detachable thumb turn has a protrusion protruding from the outer periphery of the detachable shaft arranged on the center of rotation, and the rotational force of the detachable thumb turn is applied to the thumb turn shaft by fitting the protrusion to the notch portion of the thumb turn shaft. Communicated.

  However, in the above-described conventional example, since the protrusion is formed on the relatively small diameter attaching / detaching shaft, the stress load on the protrusion during the rotation operation is large, and thus the attaching / detaching shaft needs to be formed of a metal material having high strength. This has the disadvantage of increasing costs.

  In order to solve this problem, it is possible to keep the point of action away from the rotating shaft, for example, by increasing the diameter of the attaching / detaching shaft, but in this case, an insertion port opened in the base for inserting the attaching / detaching shaft etc. It is necessary to enlarge it. If the insertion slot is enlarged, the front end portion of the thumb turn shaft can be easily operated directly with a finger, so that there is a possibility that resistance to unauthorized operation is reduced.

JP 2007-255135 A

  The present invention has been made to eliminate the above-described drawbacks, and an object of the present invention is to provide a thumb-turn device that can reduce the manufacturing cost without reducing the resistance to unauthorized operation.

According to the present invention, the object is
A thumb turn main body 6 in which a thumb turn shaft 3 is rotatably held in a thumb turn case 2 having a thumb turn mounting opening 1 and fixed to the door 4, and the thumb turn shaft 3 is connected to the lock device 5 in a fixed state to the door 4. ,
A connecting protrusion 7 that can be inserted into the thumb-turn case 2 from the thumb-turn mounting opening 1, and a thumb turn 8 that is detachably mounted on the thumb-turn body 6;
At the front end portion of the thumb turn shaft 3, a cover member 10 provided with a fitting recess 9 that is free to rotate with respect to the thumb turn shaft 3 and into which the connecting projection 7 can be fitted is disposed.
The thumb turn shaft 3 and the cover member 10 are achieved by providing a thumb turn device that is connected in the rotational direction when the thumb turn 8 is mounted.

  In the present invention, the thumb turn 8 is provided with a connecting projection 7 that fits into the fitting recess 9 of the cover member 10, and the thumb turn 8 mounted on the thumb turn body 6 and the cover member 10 are connected to each other. 7 is connected in the rotation direction. The cover member 10 that is freely rotatable with respect to the thumb turn shaft 3 for operating the lock device 5 is connected to the thumb turn 8 by mounting the thumb turn 8. Thereafter, the rotational operation force applied to the thumb turn 8 is transmitted to the thumb turn shaft 3, The device 5 can be operated.

  Further, since the cover member 10 is free to rotate with respect to the thumb turn shaft 3 when the thumb turn 8 is not mounted, even if a rotational operation force is applied to the cover member 10 when the thumb turn 8 is not mounted, the rotational operation force is applied to the thumb turn shaft. 3 cannot be operated.

  The structure in which the cover member 10 and the thumb turn shaft 3 are freely rotatable relative to each other and connected when the thumb turn 8 is mounted can be easily realized by an appropriate clutch mechanism, as will be described later. As shown in FIG. 9, a part or all of the connecting projection 7 formed on the thumb turn 8 is formed to have a length penetrating the fitting recess 9 of the cover member 10 and is formed on the thumb turn shaft 3 side. It can also be configured to fit into the hole 3a.

  Therefore, in the present invention, by disposing the freely rotatable cover member 10 at the front end portion of the thumb turn shaft 3, it becomes impossible to directly operate the thumb turn shaft 3 with the thumb turn 8 removed. Resistance is improved.

  Further, since the direct operation to the thumb turn shaft 3 becomes impossible, there is no possibility that the thumb turn shaft 3 is directly operated with a finger even if the thumb turn mounting opening 1 is enlarged. As a result, it is possible to place the connecting projection 7 of the thumb turn 8 at a position separated from the center of rotation without reducing resistance to unauthorized operation. For this reason, the load burden in the connection protrusion 7 can be reduced, and it is not necessary to use an expensive material such as metal, so that the cost can be reduced.

Furthermore, the thumb turn device
The thumb turn shaft 3 and the cover member 10 can be configured to be connected so as to be idle when a predetermined relative torque is generated.

  If the thumb turn shaft 3 and the cover member 10 are configured to maintain the connection relationship until a relative torque is generated, the relative position between the thumb turn shaft 3 and the cover member 10 can be made constant in a normal use state. As a result, as shown in FIG. 9, when the connecting protrusion 7 of the thumb turn 8 is used as a connecting means between the cover member 10 and the thumb turn shaft 3, the cover member 10 is held at a predetermined rotational position and connected to the connecting protrusion. 7 and the connection hole 3a can be made to coincide with each other, so that the shift can be prevented. As shown in FIG. 9, such a configuration is such that a ball 18 urged by a compression spring 17 is disposed at the boundary between the cover member 10 and the thumb turn shaft 3, and a hemispherical recess is provided in the cover member 10. This can be realized by fitting to 19.

  Further, when the thumb turn shaft 3 and the cover member 10 are configured to be connectable until a predetermined relative torque is generated, when the load is applied to the thumb turn shaft 3 side, the thumb turn shaft 3 and the cover member 10 are not relatively connected to each other. Since almost no torque is generated, the cover member 10 can follow the rotation of the thumb turn shaft 3.

Therefore,
The cover member 10 is configured as a thumb turn device in which a lock / unlock mark 12 that faces the display window 11 opened in the thumb turn case 2 is displayed, so that the lock device 5 can be unlocked and unlocked without complicating the structure. It becomes possible to know from the room.

The structure in which the thumb turn shaft 3 and the cover member 10 are kept connected until a predetermined relative torque is generated can be realized by using various clutch mechanisms.
Between the thumb turn shaft 3 and the cover member 10, when a predetermined torque difference is generated between the thumb turn shaft 3 and the cover member 10, both the thumb turn shaft 3 and the cover member 10 are locked in the rotational direction. The clutch member 13 that moves from the locking position to the locking release position where the locking state with either one is released is interposed,
If the thumb turn device is provided with a movement restricting portion 14 for restricting the movement of the clutch member 13 to the unlocking position, the structure becomes simple.

in this case,
The clutch member 13 is urged in the centrifugal direction by an appropriate urging means 15,
The movement restricting portion 14 can be configured as a thumb turn device that is fitted in a guide recess 16 provided at the rotation center position of the cover member 10 and restricts the movement of the clutch member 13 in the centripetal direction.

further,
The connecting protrusion 7 is formed in a shape that can be fitted into one of a plurality of types of fitting recesses 9 formed in the cover member 10, and the thumb turn 8 can be attached to a cover member having different types of fitting recesses 9. If the thumb-turn device to be prohibited is configured, the thumb-turn 8 can be connected only to the cover member 10 into which the connecting protrusion 7 can be fitted, so that an unauthorized unlocking operation by mounting the illegal thumb-turn 8 can be prevented. .

  According to the present invention, it is possible to reduce the manufacturing cost without reducing the resistance to unauthorized operation.

It is a figure which shows a handle apparatus, (a) is a figure which shows the positional relationship of an inside handle and an electric lock, (b) is a B direction arrow directional view of (a). It is a figure which shows a thumb turn apparatus, (a) is a front view, (b) is the 2B-2B sectional view taken on the line of (a). It is a disassembled perspective view of a thumb turn device. It is a figure which shows a clutch member, (a) is the sectional view on the 4A-4A line of FIG.2 (b), (b) is the sectional view on the 4B-4B line of FIG.2 (b). It is explanatory drawing which shows the mounting state of a thumb turn, (a) is a side view, (b) is a top view which looked at the thumb turn from 4B direction in (a), (c) is a cover member seen from 4C direction of (a). (D) to (f) are diagrams showing changes in the fitting recesses. It is a figure which shows a detachable lever, (a) is an exploded view, (b) is a figure which shows a locked state, (c) is a figure which shows a lock release state. It is a figure which shows a clutch member, (a) is a top view, (b) is a right view, (c) is a bottom view, (d) is a 7D-7D sectional view of (a), (e) is a bottom direction It is the perspective view seen from. FIGS. 2A and 2B are views showing the operation of the clutch member, wherein FIG. 2A is a sectional view taken along the line 4A-4A in FIG. 2B when the thumb turn is rotated with the thumb turn mounted, and FIG. 2B is a view in the state of FIG. 4 (b) is a cross-sectional view taken along line 4B-4B, (c) is a diagram corresponding to FIG. 8 (a) when the thumb turn is removed, and (d) is a diagram corresponding to (b) in the state of (c), (E) is a figure corresponding to Drawing 8 (a) when a cover member is rotated in the state where a thumb turn was removed, and (f) is a figure corresponding to (b) in (e). It is explanatory drawing which shows operation | movement of this invention, (a) is a figure which shows the state which mounted | wore the thumb turn, (b) is a figure which shows the state which removed the thumb turn.

  FIG. 1 shows a handle device (H) on which the thumb turn device of the present invention is mounted. The handle device (H) includes a pair of thumb turn devices (S) fixed to the indoor side wall surface of the door 4 and an inside handle 20 connected to the thumb turn device (S). Two electric locks (locking device 5) are fixed to the door 4 corresponding to each thumb turn device (S), and each electric lock 5 is dead-bolt driven by an actuator not shown in the figure. 5a is accommodated.

  In addition to the dead bolt 5a, the electric lock 5 disposed above accommodates a latch bolt 5b for keeping the door 4 closed by being locked by the strike 21, and the inside handle 20 is When rotating around the axis (CH), the latch bolt 5b is unlocked.

  Further, an outside handle 22b is mounted on the outdoor side wall surface of the door 4 through a handle base 22a so as to be rotatable in the R direction. The latch bolt 5b is locked by rotating the outside handle 22b. Release operation can be performed.

  As shown in FIGS. 2 and 3, the thumb turn device (S) is detachably connected to the thumb turn body 6 in which the cover member 10, the thumb turn shaft 3, and the attachment / detachment operation lever 23 are incorporated in the thumb turn case 2. The thumb turn 8 is configured. The thumb turn case 2 is formed in a box shape opened to the back surface, and the back surface opening is closed by the back cover 24. Further, a thumb turn mounting opening 1 for inserting the thumb turn 8 and a handle insertion opening 2a for inserting a connecting portion (not shown) of the inside handle 20 are opened on the front wall of the thumb turn case 2. .

  The thumb turn shaft 3 includes a connecting flange 3c at one end of a shaft portion 3b and a serration portion 3d at the other end. Further, the thumb turn shaft 3 has a recess 3e that is located at the rotation center of the thumb turn shaft 3 and is open to the surface of the connection flange 3c, and is orthogonal to the rotation center of the thumb turn shaft 3 and is open to the surface of the connection flange 3c. A slit 3f is provided.

  The thumb turn shaft 3 formed as described above is rotatably held by inserting the shaft portion 3b into the bearing opening 24a formed in the back cover 24, and the serration portion 6 with the thumb turn body 6 fixed to the door 4 3d is connected to the electric lock 5 directly or via an appropriate mediating member, and transmits the rotational operation force to the thumb turn 8 to the electric lock 5.

  As shown in FIG. 5, the thumb turn 8 is formed by injection molding or cutting a synthetic resin material. The thumb turn 8 protrudes from the disk-shaped base 8a and the surface of the disk-shaped base 8a and is picked up by a finger. The operation protrusion 8b for giving the thumb turn 8 a rotation operation, the movement restricting portion 14 protruding from the back surface of the disc-shaped base 8a, and the connection protrusion 7 are provided.

  The movement restricting portion 14 is formed in a columnar shape and disposed on the center of rotation of the disk-shaped base portion 8a, and a plurality of connecting protrusions 7 are spaced apart from the movement restricting portion 14 as appropriate and surround the movement restricting portion 14. Be placed. On the outer periphery of each connecting projection 7, a locking groove 7 a for locking the attachment / detachment operation lever 23 is provided.

  The cover member 10 is formed by protruding a clutch cylinder portion 25 on the back surface of a circular flat plate portion 10a that closes the thumb turn mounting opening 1 of the thumb turn case 2 from the back surface side. It is externally fitted to the connecting flange 3c and is held coaxially with the thumb turn shaft 3 so as to be idled with respect to the thumb turn shaft 3. The clutch cylinder portion 25 is provided with a pair of operating recesses 25a having a pair of inclined surfaces that gradually become narrower toward the tip and are formed in a substantially V shape.

  The plate portion 10a is provided with a guide recess 16 formed of a circular hole which is located at the center of rotation and into which the movement restricting portion 14 of the thumb turn 8 can be inserted. Further, an identification ring 26 is affixed to the surface of the plate portion 10a, and the thumb turn case 2 is provided with the lock / unlock mark 12 displayed on the identification ring 26 by expanding a part of the thumb turn mounting opening 1 outside the case. A fan-shaped display window 11 is provided so as to be visible from the outside.

  The plate 10a is provided with a fitting recess 9 into which the connecting projection 7 of the thumb turn 8 can be fitted. As shown in FIG. 5, four types of fitting recesses 9 are set as shown in FIGS. 5B and 5D to 5F, and the thumb turn 8 can be fitted into the fitting recess 9 as well. Four types of protrusions 7 are set.

  Therefore, in this example, when the cover member 10 having the fitting recess 9 shown in FIG. 5B is held by the thumb turn case 2, the thumb turn 8 having the connecting projection 7 that can be fitted into the fitting recess 9. Only the cover member 10, that is, the thumb turn body 6 can be mounted.

  The thumb turn 8 is held and detached from the thumb turn body 6 by operating the attachment / detachment operation lever 23. As shown in FIG. 6, the attachment / detachment operation lever 23 is a plate-like member having a locking opening 27 in which a small diameter portion 27 a and a large diameter portion 27 b are connected to a central portion, and the rotation center of the thumb turn 8, that is, movement restriction. A sliding operation is performed between an initial position shown in FIG. 6B and an operating position shown in FIG. 6C within a plane orthogonal to the portion 14.

  The attachment / detachment operation lever 23 is urged toward the initial position by a compression spring (not shown), and one end thereof is disposed so as to be exposed from the thumb turn case 2 and is operated from the initial position so that the tip portion is pushed into the thumb turn case 2. Can be moved to a position.

  FIG. 6 shows the relationship between the connecting projection 7 of the thumb turn 8 and the locking opening of the attaching / detaching operation lever 23. As shown in FIG. 6A, the diameter (Da) of the small-diameter portion 27a of the locking opening 27 is shown in FIG. The diameter (Db) of the large-diameter portion is substantially equal to the outer peripheral diameter (D) of the locking groove 7 a formed in the protrusion 7, and is slightly larger than the outer peripheral diameter of the connecting protrusion 7. The center-to-center distance (d) between the portion 7 b and the small diameter portion 7 a matches the stroke of the attachment / detachment operation lever 23.

  FIG. 6B shows the relationship when the attaching / detaching operation lever 23 is in the initial position. In the initial position, the inner peripheral wall surface of the small diameter portion 27 a of the locking opening 27 is formed in the locking groove 7 a of the connecting projection 7. It is in sliding contact. In this state, since the attaching / detaching operation lever 23 is engaged with the connecting protrusion 7, the thumb turn 8 cannot be pulled out from the thumb turn case 2, and the inner peripheral wall of the small diameter portion 27a and the locking groove 7a are the same. Since it touches with a circle, it does not interfere with the rotation operation of the thumb turn 8.

  From this state, as shown in FIG. 6C, when the attachment / detachment operation lever 23 is pushed into the thumb turn case 2 (in the direction of the arrow 6C) and moved to the operating position, the center of the large diameter portion 27b becomes the center of rotation of the thumb turn 8. Moving. In this state, since the interference between the lock opening 27 and the connecting protrusion 7 is eliminated, the thumb turn 8 can be freely pulled out thereafter. As shown in FIG. 6C, once the attachment / detachment operation lever 23 is moved to the operating position, the thumb turn 8 can be removed and attached at any rotational position regardless of the rotational angle of the thumb turn 8.

  A clutch member 13 is interposed at the boundary between the cover member 10 and the thumb turn shaft 3. As shown in FIG. 7, the clutch member 13 has an operation protrusion 13a having substantially the same shape as the operation recess 25a of the cover member 10 on one side wall, and substantially the same curvature as the movement restricting portion 14 of the thumb turn 8 on the opposite side wall. It is formed by projecting a connecting leg portion 13d on the back surface of the main body portion 13c provided with a curved wall 13b having a curvature.

  As shown in FIGS. 4 and 8, the clutch member 13 has a pair of symmetrical shapes opposed to the curvature wall 13 b, and the main body portion 13 c is formed between the back surface of the plate portion 10 a of the cover member 10 and the connecting flange 3 c of the thumb turn shaft 3. The clutch cylinder part 25 is accommodated so as to be slidable therebetween. In the accommodated state in the clutch cylinder portion 25, the connecting leg portion 13d extending along the rotation center axis of the cover member 10 is fitted in the slit 3f of the thumb turn shaft 3, and the clutch member 13 and the thumb turn shaft 3 are in the rotational direction. Connected.

  As shown in FIG. 4, each clutch member 13 is biased in the separation direction by a compression spring (biasing means 15) interposed between the clutch members 13, and the operation protrusion of each clutch member 13 at the separation position. The portion 13a is fitted into the operating recess 25a. On the opposing wall surface of the clutch member 13, a boss 13 e that holds the compression spring 15 is projected.

  Further, the curvature wall 13b of the clutch member 13 constitutes a peripheral wall of a cylindrical space into which the movement restricting portion 14 of the thumb turn 8 can be inserted in a state where the operation protrusion 13a of each clutch member 13 is fitted in the operation recess 25a. It is formed.

  Therefore, in this embodiment, in the state where the thumb turn 8 is connected to the cover member 10, the operating protrusion 13a of the clutch member 13 is fitted in the operating recess 25a of the cover member 10 as shown in FIG. Further, since the movement of the clutch member 13 in the approaching direction is hindered by the restricting protrusion of the thumb turn 8, when a rotational operation force is applied to the thumb turn 8, as shown in FIG. , And the clutch member 13 rotates together with the thumb turn 8. By rotation of the clutch member 13, as shown in FIG. 8B, the thumb turn shaft 3 connected to the clutch member 13 via the connecting leg portion 13d also rotates, and the electric lock 5 can be operated.

  Further, when the electric lock 5 is rotated by means other than the thumb turn device (S) such as an actuator, the rotation operation of the electric lock 5 is transmitted to the cover member 10 via the thumb turn shaft 3, so that the cover By looking at the locking / unlocking mark 12 of the member 10, the locking / unlocking state can be known.

  On the other hand, as shown in FIG. 8C, when the cover member 10 facing the thumb-turn mounting opening 1 is rotated with a finger or the like without the thumb-turn 8 being mounted, Since a moderate rotational torque is required, a rotational torque difference is generated between the clutch member 13 and the cover member 10. When a rotational operation force is further applied to the cover member 10 from this state, the clutch member 13 is moved in the central direction by a centripetal component force received from the operation recess 25a of the clutch cylinder 25, and the operation recess 25a and the operation protrusion are moved. The engagement relationship with 13a is released. As a result, as shown in FIG. 8 (e), since only the cover member 10 rotates and the thumb turn shaft 3 cannot be rotated, unauthorized operation on the electric lock 5 is prohibited.

  Further, even when the thumb turn 8 is removed, the clutch member 13 and the thumb turn shaft 3 are connected in the rotational direction, and when the rotational operation force is input from the thumb turn shaft 3 side, the cover member 10 is not rotated. Since there is no restriction, no torque difference is generated between the cover member 10 and the thumb turn shaft 3. As a result, the cover member 10 rotates in conjunction with the thumb-turn shaft 3, that is, the locking / unlocking operation of the electric lock 5. You can know the locked and unlocked state.

DESCRIPTION OF SYMBOLS 1 Thumb turn mounting opening 2 Thumb turn case 3 Thumb turn shaft 4 Door 5 Locking device 6 Thumb turn main body 7 Connection protrusion 8 Thumb turn 9 Fitting recess 10 Cover member 11 Display window 12 Locking / unlocking mark 13 Clutch member 14 Movement restricting portion 15 Energizing means 16 Guide recess

Claims (6)

A thumb turn main body in which a thumb turn shaft is rotatably held in a thumb turn case having a thumb turn mounting opening and fixed to the door, and the thumb turn shaft is connected to the lock device in a fixed state to the door;
It has a connecting protrusion that can be inserted into the thumb turn case from the thumb turn mounting opening, and has a thumb turn that is detachably mounted to the thumb turn body.
At the front end portion of the thumb turn shaft is disposed a cover member that is free to rotate with respect to the thumb turn shaft and includes a fitting recess into which the connecting projection can be fitted,
The thumb-turn device is connected to the thumb-turn shaft and the cover member in the rotational direction when the thumb-turn is mounted.   The thumb turn device according to claim 1, wherein the thumb turn shaft and the cover member are connected so as to be idled when a predetermined relative torque is generated.   The thumb turn device according to claim 2, wherein a lock / unlock mark is displayed on the cover member so as to face a display window opened in the thumb turn case. Between the thumb turn shaft and the cover member, when a predetermined torque difference is generated between the thumb turn shaft and the cover member, the thumb turn shaft and the cover member are either locked from the locking position. A clutch member that moves to the unlocking position where the locking state with one side is released is interposed,
The thumb turn device according to claim 2 or 3, wherein the thumb turn is provided with a movement restricting portion for restricting movement of the clutch member to the unlocking position. The clutch member is urged in the centrifugal direction by appropriate urging means,
The thumb turn device according to claim 4, wherein the movement restricting portion is fitted in a guide recess provided at a rotation center position of the cover member to restrict the movement of the clutch member in the centric direction.   The connecting protrusion is formed in a shape that can be fitted into one of a plurality of types of fitting recesses formed in the cover member, and prohibits the attachment of the thumb turn to the cover member having different types of fitting recesses. The thumb turn device according to any one of 1 to 5.

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