JP2007023597A - Thumb turn device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thumb turn device which enables an operating section to be removed from a lock device only when the lock device is either in a locking state or an unlocking state, and disables the operating section from being removed when the lock device is in the other state, to thereby prevent an accidental event. <P>SOLUTION: The thumb turn device detachably holds the operating section 4 in a thumb turn case 5, and the operating section 4 is connected to a rotationally operating shaft 3 for locking/unlocking the lock device 2 secured to a door body 1, for operating the rotationally operating shaft 3 on an indoor side. The operating section 4 is inhibited from being detached from the thumb turn case 5 either in the locking state or the unlocking state of the lock device 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

 The present invention relates to a thumb turn device.

In order to prevent an unauthorized operation on the rotary knob (operation unit) from the outside, a thumb turn device that can be removed from the operation unit is disclosed in Patent Document 1. In this conventional example, the operating portion is connected to a rotating body connected to the lock device via a claw, and can be detached from the thumb turn case by releasing the locking of the claw.
Japanese Utility Model Publication No.57-27880

  However, the above-described conventional example has the following problems because the operation unit can be removed regardless of whether the locking device is locked or unlocked. That is, for example, when an emergency such as a fire occurs with the operating unit removed while in the room, the door body can only be opened after the removed operating unit is mounted again, so there is a risk of delaying escape. is there.

 The present invention has been made to eliminate the above disadvantages, and allows the operation unit to be removed only when the locking device is in either the locked or unlocked state, and the operation unit can be removed in the opposite state. It is an object of the present invention to provide a thumb turn device that can prevent an unexpected situation by making it impossible.

According to the present invention, the object is
It is a thumb turn device that is connected to a rotary operation shaft 3 that locks and unlocks the lock device 2 fixed to the door body 1 and that detachably holds an operation portion 4 that operates the rotary operation shaft 3 from the indoor side. And
The operation unit 4 is achieved by providing a thumb turn device that is prohibited from being detached from the thumb turn case 5 in any state of locking and unlocking of the lock device 2.

  In the present invention, the operation unit 4 for performing the locking / unlocking operation of the locking device 2 from the indoor side can be removed from the thumb turn case 5 only when the locking device 2 is in either the locking / unlocking state. Desorption is prohibited. As a result, for example, in a thumb turn device in which the operation unit 4 can be removed only in the unlocked state, after the operation unit 4 is removed in the unlocked state, the user exits the room and then locks it from the outside. Access to the thumb turn device becomes impossible, and unauthorized entry into the room can be reliably prevented.

  Further, when the lock device 2 is locked using the operation unit 4 from the room side when in the room, the operation unit 4 cannot be removed from the thumb turn case 5 thereafter. As a result, even when an emergency such as a fire occurs in the locked state, the operation unit 4 can be operated to quickly evacuate the room.

  On the other hand, in the thumb turn device in which the operation unit 4 can be removed only in the locked state, the lock device is used by using the operation unit 4 in order to temporarily prevent the partitioned room from being opened. After setting 2 to the locked state, it can be used to remove the operation unit 4.

  In addition to simply pulling out the operation unit 4 in the removal direction, the operation unit 4 requires a rotation operation to the operation unit 4 or an appropriately set stopper release operation prior to the removal operation. It may be a thing.

  The operation unit 4 may be, for example, a slider that is operated in translation as long as the operation torque can be applied to the rotation operation shaft 3 from the indoor side. However, if the operation unit 4 is configured as a rotating body such as a rotary knob, the operation unit 4 Since the rotation operation shaft 3 and the operation unit 4 can be connected in the rotation direction simultaneously with the insertion operation of the thumb turn case 5, the structure is simplified.

Also, the thumb turn device
The operation unit 4 is covered with a cover 6 that can freely rotate with respect to the operation unit 4.
In addition, the cover 6 can be configured to be opened with an operation opening 7 that exposes a part of the operation unit 4 and allows the rotation of the operation unit 4 to be applied.

  With this configuration, even if an attempt is made to illegally operate the operation unit 4 from the outside with the operation unit 4 attached, the operation unit 4 is covered with the cover 6, so that only the cover 6 is idled. No rotational operating force can be applied to 4. As a result, it is possible to improve crime prevention when the operation unit 4 is mounted.

  According to the present invention, the operation unit can be removed only when the locking device is in the locked / unlocked state, and in the opposite state, the operation unit cannot be removed. Therefore, it is possible to prevent an unexpected situation that the door body cannot be opened.

  As shown in FIG. 1, the thumb turn device includes a thumb turn case 5 fixed to the indoor side wall surface of the door body 1, and an operation unit 4 that can be attached to and detached from the thumb turn case 5.

  Reference numeral 3 denotes a rotary operation shaft connected to a box lock (lock device 2) fixed in the door body 1 and is rotatably supported in the thumb turn case 5 using a retaining ring 13. The end of the rotary operation shaft 3 on the side of the box lock 2 (hereinafter “rear”) is connected to the box lock 2 with the thumb turn case 5 attached to the door body 1, and the rotation operation shaft 3 is rotated to rotate the box. The dead bolt 2a of the lock 2 can be moved forward and backward to perform the locking / unlocking operation.

  The operation unit 4 includes a cylindrical shaft portion 4a and a knob portion 4b formed at the front end of the shaft portion 4a. As shown in FIG. 1 (b), the knob 4b is formed in a flat shape so that it can easily transmit the rotational operation force to the shaft 4a and can easily know the locked / unlocked state from the room. The

  The above-described operation unit 4 is detachably mounted on the thumb turn case 5 by inserting the shaft portion 4 a from the mounting hole 5 a formed on the front end surface of the thumb turn case 5. As shown in FIGS. 2 and 3, the thumb turn case is used to prevent rattling of the operation unit 4 during mounting and inadvertent detachment of the operation unit 4 at a detachable rotation position of the operation unit 4 described later. A stopper ball 14 is attached to 5. The stopper ball 14 is urged in the center direction by the compression spring 14a, and when the operation portion 4 is inserted, the stopper ball 14 is fitted into the groove 4c formed in the outer periphery of the shaft portion 4a and exhibits the function described above.

  A connecting projection 15 is formed at the rear end of the shaft 4a. The connection protrusion 15 is fitted into the connection hole 16 formed in the rotation operation shaft 3 in accordance with the operation of inserting the shaft portion 4a into the thumb turn case 5, and is integrated with the rotation operation shaft 3 in the rotation direction. . The connection hole 16 and the connection protrusion 15 are formed so that they can be fitted only when both are in a predetermined relative angular relationship. In this embodiment in which the stroke between locking and unlocking of the box lock 2 is set to 90 °, the connection hole 16 and the connection protrusion 15 are arranged so that the rotation operation shaft 3 is a box as shown by a solid line in FIG. Corresponding to the unlocked state of the lock 2, it can be connected only when the knob is a single vertical character.

  A stopper protrusion 8 that protrudes inward is provided in the mounting hole 5a of the thumb turn case 5, and the shaft portion 4a of the operation portion 4 has a long relief groove 10 in the axial length direction that is opened at the rear end of the shaft portion 4a. It is recessed. The escape groove 10 has a groove width dimension through which the stopper protrusion 8 can pass. The escape groove 10 is extended to the boundary between the shaft portion 4a and the knob portion 4b, and a stopper groove 9 is extended at the front end.

  As shown in FIG. 2, the front end of the escape groove 10 coincides with the position of the stopper projection 8 when the operating portion 4 is mounted on the thumb turn case 5, and the stopper groove 9 extends from the end in the circumferential direction of the shaft portion 4a. Extend to. Further, the relief groove 10 corresponds to the stopper projection 8 on the thumb turn case 5 side in a rotational posture in which the knob 4b is a single vertical character.

  Therefore, in this embodiment, when the box lock 2 is in the unlocked state, the knob 4b has a single vertical character, that is, the shaft 4a can be inserted into the thumb case without interfering with the stopper projection 8. When the shaft portion 4 a of the operation portion 4 is inserted from the mounting hole 5 a in a possible posture, the connection protrusion 15 of the shaft portion 4 a is fitted into the connection hole 16. When the operation unit 4 is rotated in this state, the rotation operation shaft 3 rotates, and the box lock 2 can be locked and unlocked.

  As described above, when the box lock 2 is in the unlocked state, the stopper projection 8 of the thumb turn case 5 faces the escape groove 10, and in this state, as shown in FIG. It can be removed from the thumb turn case 5 by pulling 4. As shown in FIG. 1A, inadvertent dropping of the operation unit 4 at the removable position is prevented by the stopper ball 14 described above.

  In such a state where the operation unit 4 is removed, the rotation operation shaft 3 cannot be rotated, so that it is possible to reliably prevent the thumb turn device from being illegally operated from the outside. In order to prevent operation of the rotary operation shaft 3 with the operation unit 4 removed, the front end of the rotary operation shaft 3 is disposed at a deep position in the thumb turn case 5.

  On the other hand, as shown in FIG. 3, when the operation portion 4 is operated to lock the box lock 2, the stopper protrusion 8 moves relative to the stopper groove 9, and the stopper protrusion 8 and the relief groove 10 are moved. Therefore, the operation unit 4 cannot be pulled out and removed from the thumb turn case 5. In addition, once the operation unit 4 has been removed, the connection hole 16 and the connection protrusion 15 cannot be fitted when the box lock 2 is in the locked state, and therefore cannot be mounted.

  FIG. 4 shows a second embodiment of the present invention. In the following description of the embodiment, components that are substantially the same as those of the above-described embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  In this embodiment, the operation part 4 has a cover receiving shaft part 4d obtained by extending the shaft part 4a forward, and the cover 6 is externally fitted to the cover receiving shaft part 4d so as to freely rotate.

  The cover 6 is formed in a flat shape when viewed from the front as in the above-described embodiment, and the operation opening 7 is opened by cutting away the opposing long sides. The operation opening 7 communicates with the shaft receiving hole 6a into which the cover receiving shaft portion 4d is fitted, and exposes a part of the cover receiving shaft portion 4d in a state where the cover 6 is attached to the cover receiving shaft portion 4d.

  A magnet 17 is fixed to the cover receiving shaft 4d and the cover 6. The magnet 17 on the cover receiving shaft portion 4d side is arranged so as to pass through the cover receiving shaft portion 4d in the direction orthogonal to the axis so that both magnetic poles are positioned in the vicinity of the surface of the cover receiving shaft portion 4d. A pair is embedded so that opposite magnetic poles face each other in a symmetrical position with respect to the center.

  The cover receiving shaft portion 4d and the magnet 17 of the cover 6 are arranged so that the opposite magnetic poles face each other when the cover receiving shaft portion 4d is in the unlocked state and the cover 6 is in a single letter shape.

  Therefore, in this embodiment, the operation part 4 is attached to and detached from the thumb turn case 5 as shown in FIG. 4A. In the unlocked state, the thumb turn case 5 is pulled out as shown in FIG. In the locked state as shown in FIG. 4B, the movement of the stopper projection 8 in the axial length direction is restricted by the stopper groove 9, so that the operating portion 4 cannot be removed. In addition, when the operation unit 4 is mounted, the cover receiving shaft portion 4d exposed from the operation opening 7 is picked with a finger so that the shaft portion 4a can be rotated to perform the locking / unlocking operation of the box lock 2.

  On the other hand, when the cover 6 is to be rotated from the outdoor side, the cover 6 idles with respect to the cover receiving shaft portion 4d, so that the box lock 2 cannot be unlocked. In addition, when the box lock 2 is unlocked from the room and the shaft portion 4a is rotated, the cover 6 follows the initial set position by magnetic force. In the locked state, the horizontal one character is in the unlocked state. Since it is in the form of a single letter, the occupant can easily grasp the locked / unlocked state of the box lock 2.

  FIG. 6 shows a third embodiment of the present invention. In this embodiment, the stopper projection 8 on the thumb turn case 5 side is formed as a claw-like member that engages and disengages with the stopper groove 9. The claw-like member 8 is movable toward the rotation center of the shaft portion 4a of the operation portion 4, and is urged in the central axis direction by the compression spring 8a. The claw-like member 8 has a triangular cross section in which an inclined surface 8b gradually approaching in the central axis direction as it goes rearward is formed on the front surface and a vertical surface 8c is formed on the back surface.

  In this embodiment, the shaft portion 4a of the operation portion 4 and the rotation operation shaft 3 are fitted with a connection projection 15 formed on the rotation operation shaft 3 side in a connection hole 16 formed on the shaft portion 4a side. Combined and connected in the rotational direction.

  Therefore, in this embodiment, when the operating portion 4 is pushed into the thumb turn case 5 when the relief groove 10 and the claw-like member 8 are not opposed to each other, that is, when the box lock 2 is in the locked state, the compression spring The claw-like member 8 is once immersed in the thumb turn case 5 against the reaction force of 8a and allows passage of the shaft portion 4a. When the shaft portion 4a is further pushed in from this state, when the operating portion 4 can be fitted to the connecting protrusion 15, that is, when the cover 6 is in a horizontal character position, the connecting protrusion 15 and the connecting hole 16 are When the fitting is completed, the claw-like member 8 faces the stopper groove 9, and the claw-like member 8 pops out of the thumb turn case 5 again by the restoring force of the compression spring 8 a and is elastically locked in the stopper groove 9.

  When a force in the pulling direction is applied to the operation unit 4 in this state, the vertical surface 8c on the back surface of the claw-like member 8 comes into contact with the wall surface of the stopper groove 9, and no component force in the immersion direction is generated. The operation unit 4 can be removed only in the position where the claw-like member 8 faces, that is, in the unlocked state.

  FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the cover 6 includes a cylindrical portion 6b that enters the thumb turn case 5, and the cylindrical portion 6b is held by the thumb turn case 5 in a non-detachable and rotatable manner.

  On the other hand, the operation unit 4 includes a shaft portion 4a accommodated in the thumb turn case 5, and a cover receiving shaft portion 4d extending forward from the shaft portion 4a and having a larger diameter than the shaft portion 4a. The cover 6 is mounted in a state of being inserted into the cylindrical portion 6b. A magnet 17 is fixed to the cover 6 and the operation unit 4, and the cover 6 is made to follow the rotation angle of the operation unit 4 as in the second embodiment described above.

  As shown in FIG. 7, a stopper plate 11 is fitted on the cylindrical portion 6b, and a ring-shaped stopper groove 9 is formed at a position corresponding to the stopper plate 11 of the shaft portion 4a. The stopper plate 11 is movable in translation within a movable plane orthogonal to the axial direction, and can be locked to the stopper groove 9 on the inner peripheral wall surface of the stopper plate 11 through a stopper passage hole 6c provided in the cylindrical portion 6b. A simple stopper projection 8 is provided.

  In this embodiment, it is assumed that the thumb turn device is used with the shaft portion 4a being horizontal. As shown in FIG. 7, the shaft portion 4a is in the locking rotation position, and the tube portion 6b follows this. When in the rotated position, each is disposed such that the stopper passage hole 6c faces in the vertical direction.

  A cam surface 12 is formed on the outer peripheral wall of the cylindrical portion 6 b and the inner peripheral wall of the stopper plate 11. As shown in FIG. 8, when the cover 6 rotates to the unlocking rotation position, the cam surfaces 12 abut against each other due to the weight of the stopper plate 11 and generate a lateral operation force on the stopper plate 11 in FIG. .

  As shown in FIG. 8 (c), when the stopper plate 11 is moved sideward by the lateral operating force generated by the cam surface 12, the stopper projection 8 is detached from the stopper groove 9, and in this state, as shown in FIG. As shown, only the operation unit 4 can be pulled out.

  In the above description, the stopper plate 11 obtains an operating force by its own weight and engages / disengages with the stopper groove 9 of the locking projection. In addition to this, a constant biasing force in the direction of its own weight is applied to the spring or the like. Can also be given.

It is a figure which shows this invention, (a) is sectional drawing, (b) is a front view. 2A and 2A are cross-sectional views taken along line 2A-2A in FIG. 1A, and FIG. 1B corresponds to FIG. 1A illustrating a state in which an operation unit is pulled out. It is a figure which shows a locked state, (a) is sectional drawing corresponding to Fig.1 (a), (b) is sectional drawing corresponding to Fig.2 (a). It is a figure which shows the 2nd Embodiment of this invention, (a) is sectional drawing in an unlocking state, (b) is sectional drawing in a locking state. It is sectional drawing which shows the state which removed the operation part. It is a figure which shows the 3rd Embodiment of this invention, (a) is sectional drawing, (b) is the 6B-6B sectional view taken on the line of (a). It is a figure which shows the 4th Embodiment of this invention, (a) is sectional drawing of a locking state, (b) is the 7B-7B sectional view taken on the line of (a). It is a figure which shows an unlocking state, (a) is sectional drawing corresponding to Fig.7 (a), (b) is the 7B-7B sectional view taken on the line in FIG. ) Is a sectional view taken along line 7B-7B in FIG. 7A in the unlocked state. It is sectional drawing which shows the state which removed the operation part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door body 2 Locking device 3 Rotation operation shaft 4 Operation part 5 Thumb turn case 6 Cover 7 Opening for operation 8 Stopper protrusion 9 Stopper groove 10 Escape groove 11 Stopper plate 12 Cam surface

Claims (7)

A thumb turn device that is connected to a rotary operation shaft that locks and unlocks the lock device fixed to the door body, and that holds the operation unit that operates the rotary operation shaft from the indoor side detachably on the thumb turn case,
The operation unit is a thumb-turn device that is prohibited from being detached from the thumb-turn case in any state of locking and unlocking of the lock device. The operation unit is covered with a cover that can freely rotate with respect to the operation unit,
2. The thumb turn device according to claim 1, wherein an opening for operation is provided in the cover so as to allow part of the operation portion to be exposed and to apply a rotational operation force to the operation portion.   The thumb turn device according to claim 2, wherein the cover is connected to the thumb turn case in a non-detachable manner. The operation unit is configured to receive a stopper projection formed on the thumb turn case in a stopper groove that is long in the circumferential direction and to be prevented from being removed from the thumb turn case.
The thumb turn device according to claim 1, 2 or 3, wherein the stopper groove is provided with a relief groove which is opposed to the stopper projection at the rotational position where the operating portion can be detached and opened at one end at the lock device side end. A stopper plate which is movable within a movable surface orthogonal to the rotation operation axis, and which is provided with a stopper projection on the inner peripheral wall and fitted on the cover;
A circumferentially long stopper groove formed on the outer periphery of the operation portion and engaged with and disengaged from the stopper projection;
The stopper plate is urged in a predetermined specific direction in which the stopper projection is locked in the stopper groove at the non-detachable rotation position of the operation unit,
The cam that moves the stopper plate in the unlocking direction from the stopper groove by generating a component force from the urging force to the stopper plate at the rotation position where the operation portion can be detached at the contact portion between the stopper plate and the cover. 4. A thumb turn device according to claim 3, wherein a surface is formed.   6. The thumb turn device according to claim 5, wherein the stopper plate has a self-weight as a biasing force when the movable surface of the stopper plate is a vertical surface. The stopper projection is formed by a claw-like member that once enters the thumb turn case with respect to the pushing operation of the operating portion and then returns to the original position at the stopper groove corresponding position. The thumb turn device according to claim 1, wherein the thumb turn device is allowed to be attached.

Images