JP2008190190A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device capable of enhancing resistance to the cutting destruction of a dead bolt. <P>SOLUTION: This lock device comprises: the dead bolt 4, the leading end of which is protruded forward from a front plate of the lock case 1 in a locking position, so as to be inserted into the strike hole 3 of the other side strike 2; and a hook member 6 which is rotatably connected to the dead bolt 4, which makes the dead bolt 4 changed into a strike locking attitude along with a shift to the locking position, and which makes a locking claw 5 locked to a peripheral wall of the strike hole 3. A cutting-resisting element 7, which is formed of a hard material excellent in resistance to cutting by a cutting tool and the front and rear ends of which are positioned back and forth across the front plate in the strike locking attitude, is fixed to the hook member 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a locking device.

As a locking device that can prevent the detachment from the dead bolt due to an illegal deformation operation with respect to the strike by attaching a sickle member to the tip of the dead bolt and locking the sickle member to the strike when the dead bolt is in a locked state The thing of patent document 1 is known.
JP 2006-125058 A

  For example, when the lock device is used while being fixed to the door body, a gap is generated between the door body and the door frame. In the above conventional example, when the dead bolt is cut by the blade inserted from the gap in the locked state by the dead bolt, there is a disadvantage that the strike locking by the sickle member is released.

  The present invention has been made to eliminate the above-described drawbacks, and an object of the present invention is to provide a locking device with improved resistance to dead bolt cutting fracture.

  In the present invention, a sickle member 6 having a locking claw 5 is rotatably supported on the dead bolt 4, and when the dead bolt 4 moves to the locking position, the locking claw 5 of the sickle member 6 is moved to the counterpart strike 2. The dead bolt 4 is prevented from being detached from the strike hole 3 by being engaged with the peripheral wall of the strike hole 3. The sickle member 6 holds the cutting resistor 7 made of a hard material excellent in cutting resistance against cutting blades, whereby the cutting tool is inserted through the gap between the door body 11 and the door frame 12 and the tip of the dead bolt 4 or the sickle member 6 is attached. Since it becomes impossible to cut | disconnect, the tolerance with respect to an unauthorized destruction improves.

  The shape and quantity of the cutting resistor 7 can be determined as appropriate. Furthermore, if the cutting resistor 7 is held idle, the cutting force by the blade of the blade cannot be applied to the cutting resistor 7. Resistance to cutting blades is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the tolerance with respect to the cutting fracture of a dead bolt can be improved.

  1 and 2 show an embodiment of the present invention configured as an electric lock. The electric lock is formed by accommodating the dead bolt 4 driven by the power unit 13 in the lock case 1 and is used by being fixed to the door body 11.

  As shown in FIG. 4, the lock case 1 is formed in a hollow box shape by connecting a pair of case halves 14, and a mounting plate 15 is fixed to the front end surface. The mounting plate 15 provides a fixing flange to the door body 11 when being inserted and fixed in the door body 11, and after being fixed to the door body 11, it is covered with a decorative plate 16.

  The power unit 13 is formed by housing a motor, a gear train, and the like (not shown) in the unit case 17, and is driven and controlled by a control signal from a lead wire 18 drawn from the unit case 17. The power generated in the power unit 13 is output to the output shaft 19 of the power unit 13 and rotates the relay gear 20 connected to the output shaft 19. The rotation of the relay gear 20 is transmitted to the dead drive cam 22 via a transmission rod 21 provided with rack gears 21a at both ends.

  As shown in FIGS. 2 and 3, the dead drive cam 22 includes a dead operation arm 22 a and is driven to rotate between approximately 90 ° locking / unlocking rotation positions in accordance with the locking / unlocking operation of the power unit 13. When the dead drive cam 22 is rotationally driven to the locking rotation position side, the dead operation arm 22a pushes the locking pushed portion 31a formed on the dead bolt 4 forward, and the tip of the dead bolt 4 jumps forward. Move to the locked position. Further, when the dead drive cam 22 is rotationally driven to the unlocking rotation position side from this state, the dead operation arm 22a pushes the unlocking driven portion 4a of the dead bolt 4 backward, and the dead bolt 4 is moved to FIG. Move to the unlocking position shown in.

  Further, in order to drive the dead bolt 4 by the cylinder lock 23 fixed to the door body 11 or the thumb turn device 24, a rotation shaft member such as the cylinder lock 23 is fitted to the rotation center portion of the dead drive cam 22. For this purpose, a fitting hole 22b is formed.

  A link rod 25 is connected to the dead drive cam 22, and one end portion of the link rod 25 penetrates through a column 26 erected on the lock case 1 so as to be freely slidable from the side. The link rod 25 has a compression spring 27 wound around one end of the column 26 and the other end pressed against a stopper flange 25a formed on the link rod 25. Stop moderation at the end position.

  As shown in FIG. 5, a synthetic resin guide member 28 is fixed to the lock case 1 in order to smoothly slide the dead bolt 4 and prevent the occurrence of abnormal noise during operation. The guide member 28 has a guide surface with which the side wall of the dead bolt 4 comes into sliding contact, and is formed in a U-shaped cross section. The guide member 28 is formed in a rectangular cylindrical shape with a pair of substantially the same shape as that shown in the figure, and surrounds the entire side wall of the dead bolt 4, but only one guide member 28 is shown in FIG.

  Further, a stopper lever 29 is connected to the lock case 1 so as to be swingable around the support shaft 30. The stopper lever 29 has a cylindrical dead stopper 29a at the tip, and is biased counterclockwise in FIG. 5 by a torsion spring (not shown). The stopper lever 29 is pushed up to the upper stroke end position by interfering with the dead operation arm 22a while the dead drive cam 22 moves from the locking rotation position to the unlocking rotation position.

  FIG. 6 shows details of the dead bolt 4. The dead bolt 4 is formed by bending a thick steel plate into a U shape. The dead bolt 4 is fitted to the guide member 28 so as to be slidable in the longitudinal direction with the open cross-section facing downward, and a stopper step 4b is formed at the upper end of the rear part. As shown in FIG. 3, when the dead bolt 4 is in the locking position, the stopper step 4b is locked by the dead stopper 29a and restricts the movement of the dead bolt 4 toward the unlocking position.

  As described above, the dead stopper 29a is driven to the upper stroke end side prior to the initial rotation of the dead drive cam 22 to the unlocking rotation position side, that is, prior to the movement of the dead bolt 4 to the unlocking position side. The locking with the stepped portion 4b is released, and the movement of the dead bolt 4 to the unlocking position side is allowed.

  The unlocking driven portion 4a described above is formed by cutting out the rear end of the dead bolt 4 in order not to be loaded with an unauthorized breaking force from the outside.

  On the other hand, the locking driven portion 31 a is formed at the rear end of the reinforcing block 31, which is separate from the dead bolt 4. The reinforcing block 31 has an appropriate length in the front-rear direction, and is formed to have a thickness substantially equal to the interval between the opposing wall surfaces of the dead bolt 4 so that the lower end open end of the dead bolt 4 can be closed. The reinforcing block 31 has a fitting protrusion 31b at the front end, and is fixed to the dead body 4c using a roll pin 32 or the like.

  As shown in FIG. 3, when a destructive operation force in the pushing direction is applied to the dead bolt 4 in the locked position, the reinforcing block 31 having sufficient rigidity bears the load. For this reason, harmful deformations such as buckling deformation occur in the dead bolt 4 to cause an unexpected operation of the dead drive cam 22 and the like, thereby preventing a problem that the unlocking operation is illegally performed. In addition, the dead load 29 is disposed at the upper and lower end positions and has an appropriate interval in the vertical direction, and the dead operation arm 22a of the dead drive cam 22 cooperates with the dead load. Since the generation of rotational torque in the direction in which the other end moves up and down with respect to one end as shown in FIG. 4 is prevented, an unexpected malfunction to the peripheral members due to the rotation of the dead bolt 4 in that direction is prevented.

  As shown in FIG. 7, the dead bolt 4 is provided with a long guard insertion long hole 4d at the front and rear, and the dead guard 33 is inserted into the guard insertion long hole 4d. The dead guard 33 is formed of a steel plate, and mounting pieces 33a formed on both left and right ends are inserted into the mounting openings 1a of the lock case 1 and fixed in a horizontal position at a predetermined position.

  The dead guard 33 includes a fitting notch 33b at the rear end edge. As shown in FIG. 7 (b), when the dead bolt 4 is moved to the locking position, the fitting notch 33b is fitted to the rear end edge of the guard insertion long hole 4d of the dead body 4c, and between the opposing wall surfaces in the part. Deformation in the direction of approaching and separating. As a result, the rigidity and strength against the load are increased.

  Furthermore, a roll prevention piece 33c that protrudes further forward from the attachment piece 33a is provided at the front edge of the dead guard 33. As shown in FIG. 7, the anti-rolling piece 33c abuts against the back surface of the lock case 1 in the mounted state, and prevents deformation of the dead body 4c due to rolling of the dead guard 33 itself.

  The sickle member 6 is pivotally supported around the support shaft 34 on the dead bolt 4 configured as described above. As shown in FIG. 6, the sickle member 6 is formed by fixing cover plates 9 on both surfaces of the core plate portion 8, and includes a locking claw 5 and an operating protrusion 35 at front and rear ends. In this embodiment, the core plate portion 8 is formed of a single thick steel plate. However, it is also possible to form a laminate of a plurality of sheets, and the resistor housing hole opened in the core plate portion 8. The cutting resistor 7 is inserted into 10. The cutting resistor 7 is formed into a pin shape from a material having excellent cutting resistance such as hardened steel, and is inserted into the resistor housing hole 10 formed as a through hole in the core plate portion 8, and then the cover plate 9. Dropping is prevented by fixing.

  A fitting recess 6 a is formed at the rear end of the sickle member 6. The fitting recess 6 a is formed in a groove shape by extending the rear end of the cover plate 9 further rearward from the rear end of the core plate portion 8.

  When the dead bolt 4 is in the unlocked position, the sickle member 6 is stored in the dead bolt 4 and the strike 2 of the locking claw 5 during the locking operation as shown in FIG. Take a retracted posture to prevent collisions with. As shown in FIG. 2, this retracted posture is maintained by the operating protrusion 35 riding on the interference portion 36 formed on the guide member 28, and the dead bolt 4 moves to the locking position side from this state. Then, as shown in FIG. 3, the operating protrusion 35 comes into contact with the sickle operating protrusion 37 formed on the guide member 28, and applies a rotational force to the sickle member 6 counterclockwise. At this time, since the sickle operating ridge 37 is formed on the guide member 28 made of synthetic resin, generation of metal sound during the locking operation is prevented.

  As shown in FIG. 1, by the rotation of the sickle member 6, the locking claw 5 of the sickle member 6 protrudes from the lower end edge of the dead bolt 4. When it moves to, it latches on the surrounding wall of the strike hole 3, and regulates the movement to the said direction.

  1 and 3, when the dead bolt 4 is in the locking position and the sickle member 6 is in a position where the sickle member 6 can be locked with the peripheral wall of the strike hole 3, as shown in FIGS. And it arrange | positions so that it may be located inside and outside the lock case 1 on both sides of the decorative plate 16. As a result, the cutting operation with the blade inserted in the gap between the door body 11 and the door frame 12 is due to the cutting-resistant cutting strength of the cutting resistor 7, and further due to the idling of the cutting resistor 7 accompanying the cutting operation of the blade. Eliminated.

  In this case, if the cutting resistor 7 is arranged at the center in the vertical direction, the dead bolt 4 is not cut more than half even if the cutting operation from the vertical direction by the cutter is applied.

  Furthermore, as shown in FIG. 6, when the sickle member 6 is in a position where it can be locked with the peripheral wall of the strike hole 3, the fitting protrusion 31 b of the reinforcing block 31 is fitted into the fitting recess 6 a of the sickle member 6. . In this state, since the front part and the rear part of the dead bolt 4 are reinforced without breaks by the sickle member 6 and the reinforcing block 31, even if a lateral destructive force is applied to the dead bolt 4, it can be easily bent. Disappear.

It is a figure which shows this invention, (a) is a figure which shows a locked state, (b) is 1B arrow directional view. It is a figure which shows the state which the deadbolt moved to the unlocking position. It is a figure which shows the state which the deadbolt moved to the locking position. It is a perspective view which shows the assembly of a locking device, (a) is a perspective view which shows the state which attaches a case half to another case half, (b) is a perspective which shows the state which attaches an attachment plate and a decorative plate to a lock case. FIG. It is a figure which shows the state which removed the dead bolt, (a) is a figure which shows the state which the dead bolt moved to the locking position, (b) is a figure which shows the state in the middle of the dead bolt moving to the unlocking position. It is a figure which shows a dead bolt, (a) 6A-6A sectional view, (b) 6B arrow view, (c) 6C arrow view, (d) moved to the unlocking position of (a) It is a figure which shows a state. It is sectional drawing which shows a locking device, (a) is 7A-7A sectional view taken on the line, (b) is sectional drawing which shows the state which the dead bolt of (a) moved to the locking position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock case 2 Strike 3 Strike hole 4 Dead bolt 5 Locking claw 6 Sickle member 7 Cutting resistor 8 Core board part 9 Cover plate 10 Resistor accommodation hole

Claims (5)

A deadbolt whose front end protrudes forward from the front end of the lock case at the locking position and is inserted into the strike hole of the counterpart strike;
A sickle member that is rotatably connected to the dead bolt, shifts to the strike locking posture with the transition to the locking position of the dead bolt, and the locking claw locks to the peripheral wall of the strike hole,
A locking device in which the sickle member is formed of a hard material having excellent cutting resistance, and a cutting resistor whose front and rear ends are positioned front and rear across the front end of the lock case in a strike locking posture. The sickle member is formed by laminating and fixing a cover plate on the surface layer of the core plate part,
The locking device according to claim 1, wherein the cutting resistor is fitted and held in a resistor housing hole provided in the core plate portion.   The locking device according to claim 1 or 2, wherein the cutting resistor is freely rotatable in a moving direction of a cutting blade along a front end surface of the lock case.   The locking device according to claim 1, wherein the cutting resistor is formed in a pin shape.   The said cutting resistor is a locking device in any one of Claim 1 to 4 arrange | positioned on the centerline in the side view of a dead bolt.

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