JP2010236321A - Thumb-turn device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thumb-turn device which is highly safe. <P>SOLUTION: The thumb-turn device includes a thumb-turn case 2 rotatably holding a thumb-turn shaft 1 connected to a lock device, and a knob member 4 removably inserted into a mounting opening 3 of the thumb-turn case 2 and capable of rotating the thumb-turn shaft 1 between locking and unlocking rotational positions in the inserted state. The thumb-turn case 2 is provided with a stopper 6 restricting removal of the knob member 4 by blocking a route of movement of a fall-off preventive part 5, which is arranged on the knob member 4, in a direction of removal when the knob member 4 is in a locking rotational position, and allowing the knob member 4 to be removed by opening the route of movement when the knob member 4 is in the unlocking rotational position. The fall-off preventive part 5 of the knob member 4 and the stopper 6 are formed so that they may be elastically engageable with each other by operation of the knob member 4 in the direction of insertion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a thumb turn device.

  In order to prevent unauthorized operation of the rotary knob from the outside, a thumb turn device that can be removed from the rotary knob is disclosed in Patent Document 1. In this conventional example, the thumb turn is connected to a rotating body connected to the lock device via a claw, and can be removed from the thumb turn case by releasing the locking of the claw.

Japanese Utility Model Publication No.57-27880 Japanese Patent Laid-Open No. 2007-23597

  However, since the conventional example described above can remove the thumb turn at any position where the locking device is unlocked / unlocked, for example, when a fire or the like occurs when the thumb turn is locked and the thumb turn is removed, There is a risk that accidents such as delaying escape due to troublesome mounting will occur.

  The present invention has been made to solve the above drawbacks, and an object of the present invention is to provide a highly safe thumb turn device.

  The thumb turn device is formed by holding a thumb turn shaft 1 connected to a lock device such as a box lock fixed to a door to a thumb turn case 2 and is operated by rotating the knob member 4 attached to the thumb turn case 2. To operate. The knob member 4 serving as an input unit when operating the locking device can be removed from the thumb turn case 2 to prevent unauthorized operation from the outside when going out, and is a book that regulates removal in the locked state. In the invention, when an emergency occurs while in the room, prompt evacuation to the outside can be guaranteed.

  In addition, by enabling removal in the unlocked state, the thumb turn device 4 is unlocked while in the room, and then the knob member 4 is removed, and then locked from outside, thereby allowing unauthorized removal while the user is away. It becomes possible to completely prevent the lock operation.

  In addition, since it is possible to attach the knob member 4 regardless of the position of the thumb turn shaft 1, when the housemate goes out while in the room, the roommate attaches the knob member 4 to the door. Can be locked and unlocked.

  In order to perform the above-described operation, the thumb turn case 2 is provided with a stopper portion 6, and the knob member 4 is provided with a retaining portion 5. The stopper portion 6 blocks the movement path in the removal direction of the retaining portion 5 on the side of the knob member 4 when the knob member 4 is in the locking rotation position, thereby restricting the removal of the knob member 4, and When in the lock rotation position, the movement path is opened to allow the knob member 4 to be removed. For example, the retaining portion 5 is formed as a protrusion protruding laterally from the axial direction, and the stopper portion 6 is formed as an inward flange that protrudes from the inner wall of the mounting opening 3 and restricts the movement of the retaining portion 5 in the inserted state in the removal direction, and when the knob member 4 is in the unlocked rotation position. A position corresponding to the retaining portion 5 can be cut out to allow removal at the position.

  Further, in order to enable the mounting operation of the knob member 4 at any locking / unlocking position, the retaining portion 5 and the stopper portion 6 of the knob member 4 can be elastically locked by an operation in the insertion direction of the knob member 4. For example, in the example described above, the retaining portion 5 is formed by a “let” -shaped plate spring or a “let” -shaped piece body that is biased in the protruding direction by the spring, and the inclined surface is formed. By arranging in the posture toward the top of insertion, the leaf spring etc. is once released from the protruding state by the insertion operation and gets over the flange, and after that, it is returned to its original position by the elastic restoring force, and the extraction is restricted. be able to.

  Further, when the knob member 4 constitutes a thumb turn device that is connected to the thumb turn shaft 1 by fitting with an eccentric shaft having a circular cross section in a state of being inserted into the thumb turn and transmits a rotational operation force, the knob member 4 is removed. In this state, since the operating force load point on the thumb turn shaft 1 is completely eliminated, unauthorized operation on the thumb turn shaft 1 with the knob 4 removed is completely prevented.

  According to the present invention, it is possible to reliably prevent an illegal answering operation from outside while ensuring safety when in the room.

It is a figure which shows a thumb turn apparatus, (a) is a front view, (b) 1B direction arrow view of (a), (c) is 1C direction arrow view of (b). FIG. 2 is a cross-sectional view of FIG. 1, (a) is a diagram illustrating an initial state of an unlocking position, and (b) is a diagram illustrating a state where an operation piece is operated. It is a figure which shows a thumb turn case, (a) is sectional drawing, (b) is a 3B direction arrow directional view of (a), (c) is a front view. It is a figure which shows a knob member, (a) is sectional drawing, (b) is sectional drawing which shows the state which operated the operation piece, (c) is a 4C direction arrow directional view of (a).

  As shown in FIG. 1 and subsequent figures, the thumb turn device includes a thumb turn case 2 fixed to the indoor side wall surface of the door, and a knob member 4 that is detachable from the thumb turn case 2.

  The thumb turn case 2 is formed in a cylindrical shape having a mounting opening 3 having a circular cross section at the center, and a cylindrical cover 9 urged rearward by a spring 8 is mounted on the outer peripheral portion. The cylindrical cover 9 has its rear edge pressed against the door surface in a state in which the thumb turn device is fixed to the door, and closes the thumb turn mounting opening provided in the door.

  Also, the thumb turn shaft 1 is attached to the thumb turn case 2 so as to close the rear end opening. The thumb turn shaft 1 is rotatably mounted using a retaining ring 10, and a connecting shaft 1 a that is connected to a box lock fixed in the door at the rear end portion in the rotational direction is formed. As shown in FIG. 3, the connecting shaft 1a is formed in a cross-shaped cross section in order to prevent idling in the rotation direction.

  Further, a pin having a hemispherical shape at one end is attached to the front end portion of the thumb turn case 2 to form a stopper portion 6. The pin is mounted so as to be movable in a direction orthogonal to the central axis of the mounting opening 3 with the hemispherical tip directed toward the mounting opening 3, and is urged in a direction protruding into the mounting opening 3 by a compression spring 6a. Each pin 6 is formed with a stopper flange 6b to prevent the pin 6 from dropping into the mounting opening 3. In this embodiment, two pins 6 are arranged at symmetrical positions with respect to the center line of the mounting opening 3.

  On the other hand, the knob member 4 is formed by connecting the operation piece 7 to a knob body 11 in which a columnar insertion portion 4b protrudes from the rear end of the knob portion 4a having an oval cross-sectional shape. The insertion portion 4b is formed with a groove-shaped retaining portion 5 having an outer periphery cut out over the entire circumference. When the inserting portion 4b is inserted into the mounting opening 3, the pin 6 is fitted into the retaining portion 5, and thereafter The removal of the knob member 4 from the thumb turn case 2 is restricted.

  At the rear end of the insertion portion 4b, a fitting projection 12 that fits into the fitting recess 1b provided in the thumb turn shaft 1 is provided. As will be described later, the fitting recess 1b and the fitting protrusion 12 are circular so that the fitting recess 1b appearing on the surface in the state where the knob member 4 is removed does not become a hooking allowance at the time of unauthorized unlocking operation. The fitting recess 1b and the fitting projection 12 are biased with respect to the central axis of the mounting opening 3 so as to have a cross-sectional shape and to enable transmission of rotational operation force from the knob body 11. They are connected in an eccentric shaft fitting state.

  The operation piece 7 is formed in a plate shape with an operating projection 7a at one end, and is fitted into a slit-like mounting groove 11a formed in the knob body 11 in the longitudinal direction. As shown in FIG. 4, two operation pieces 7 having the same shape are arranged side by side on the same surface in a posture in which the operating projection 7 a faces away from each other, and detachment toward the front end is picked and screwed to the main body 11. It is regulated by the cap member 13.

  Each operation piece 7 is swingable with its rear end and front end guided by the knob body 11 and the guide portions 11 b and 13 b of the cap member 13, and is operated by a compression spring 14 interposed between the operation pieces 7. The protrusions 7a are biased in the direction in which they approach each other. In order to restrict the stroke in the proximity direction, a stopper projection 7 b is projected at the front end of the operation piece 7.

  As shown in FIG. 2, the operation piece 7 is arranged so that the operating protrusion 7 a corresponds to the tip of the pin 6 when the knob member 4 attached to the thumb turn case 2 is in the unlocking rotation position.

  Therefore, in this embodiment, when the thumb member 4 is mounted on the thumb turn case 2, the pin 6 is fitted to the retaining portion 5 and the removal is restricted. In the mounted state, the knob member 4 is rotated to the unlocking rotation position, and the box lock is unlocked, and the exposed portion from the mounting groove 11a of the operation piece 7 is pushed in as shown in FIG. When the piece 7 is swung, the pin 6 is detached from the retaining portion 5 by being pushed by the operating projection 7 a of the operation piece 7.

  In this state, the knob member 4 can be removed from the thumb turn case 2, and when it is removed, it becomes impossible to apply the rotational operation force to the thumb turn shaft 1. After that, when the knob member 4 comes out of the room and performs the locking operation from the outside. Unauthorized unlocking operation from outside can be completely prevented.

  Further, when the occupant in this state pushes the insertion portion 4b of the knob member 4 into the thumb turn case 2, the pin 6 protruding into the mounting opening 3 is caused by the chamfered portion 4c formed at the rear end of the insertion portion 4b. It is pushed into the immersion posture, and the operation of inserting the knob member 4 is allowed.

  Further, when the thumb turn shaft 1 is in the locking rotation position, the operating protrusion 7a of the operation piece 7 does not correspond to the pin 6, so that the fitting state of the pin 6 from the retaining portion 5 can be eliminated. First, the operation of removing the knob member 4 is prohibited.

DESCRIPTION OF SYMBOLS 1 Thumb turn shaft 2 Thumb turn case 3 Mounting opening 4 Knob member 5 Retaining part 6 Stopper part 7

Claims (4)

A thumb turn case for rotatably holding a thumb turn shaft connected to the locking device;
A thumb member that is removably inserted into the mounting opening of the thumb turn case, and has a thumb member that can be rotated between the locking and unlocking rotation positions in the inserted state;
The thumb turn case restricts the removal of the knob member by closing the movement path in the removal direction of the retaining portion provided in the knob member when the knob member is in the locking rotation position, and the knob member is unlocked and rotated. When in position, a stopper portion that opens the moving path and allows the knob member to be removed is provided,
Further, the retaining member and the stopper portion of the knob member are thumb turn devices formed so as to be able to be bullet-locked by operation in the insertion direction of the knob member. The stopper portion is formed so as to be movable back and forth in the mounting opening and is urged in a protruding direction into the mounting opening.
The retaining part is formed in a groove shape that can be fitted with the stopper part,
The thumb turn device according to claim 1, wherein the knob member is provided with an operation piece capable of immersing the stopper when in the unlocking rotation position.   The operation piece is attached to the knob member so as to be swingable, and the stopper portion is formed of a pin or a sphere whose tip is pressed against the end of the operation piece when the knob member is in the unlocking rotation position. The thumb turn device according to claim 2.   4. The thumb turn device according to claim 1, wherein the knob member is connected to the thumb turn shaft by fitting with an eccentric shaft having a circular cross section in a state of being inserted into the thumb turn case and transmits a rotational operation force.

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