JP2008190188A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device which can exert durability against the operation of pulling out a dead bolt, without the strength deterioration of the whole dead bolt. <P>SOLUTION: This lock device comprises the U-shaped cross-section dead bolt 2 which is housed in a lock case 1 and driven to make a translational motion between locking and unlocking positions and the leading end of which is protruded forward from the lock case 1 in the locking position, and a dead guard 4 which is protruded into the lock case 1 from a wall surface of the lock case 1 and inserted from a longitudinally-long guard inserting slot 3 opened in the opposed side walls of the dead bolt 2. The dead guard 4 is formed in such a rectangular cross-sectional shape that its short side is directed in the direction of the short side of the slot 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a locking device.

As a lock device in which a dead bolt having a U-shaped cross section is accommodated in a lock case so as to be able to be locked and unlocked, the one described in Patent Document 1 is known. In this conventional example, the dead bolt is provided with a second engaging portion having a long hole in the locking / unlocking operation direction, and a pin-shaped fixed support shaft having a circular cross section protruding from the locking device is inserted, Pulling out the dead bolt when the dead bolt is in the locked position is prevented.
JP 2003-247363 A

  However, in the above conventional example in which the fixed support shaft used for retaining the dead bolt has a circular cross section, if the diameter of the fixed support shaft is increased in order to improve the resistance to pulling out the dead bolt, the second engagement portion opens. There is a drawback that the area is increased and the strength of the entire deadbolt is greatly reduced.

  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 that can exhibit high resistance to a dead bolt pull-out operation without reducing the strength of the entire dead bolt.

  A guard insertion long hole 3 is formed in a dead bolt 2 having a U-shaped cross-section that protrudes from the lock case 1 by a locking operation, and a dead guard 4 protruding from the inner wall of the lock case 1 is inserted. The guard insertion long hole 3 has such a length that the translational movement accompanying the locking and unlocking of the dead bolt 2 is not impossible by the insertion of the dead guard 4, and an improper pulling force is applied to the dead bolt 2 in the locked state. When this is done, the rear end of the guard insertion slot 3 (in this specification, the protruding direction of the dead bolt 2 during locking is defined as “front” and “up and down” is defined based on the posture shown in the figure). After coming into contact with the rear end of the dead guard 4, the pulling force applied to the dead bolt 2 acts on the dead guard 4 as a shearing force.

  In the plate material having a rectangular cross section, since the shearing force in the long side direction is remarkably high even if the plate thickness is thin, in the present invention in which the dead guard 4 has a long rectangular cross section in the front and rear direction, the dead guard 4 is a plate. Even if the dimension in the thickness direction is small, sufficient strength can be exhibited.

  As a result, the short side dimension of the guard insertion long hole 3 can be reduced, and the strength of the entire dead bolt 2 can be prevented from being lowered.

  In addition, when a vertical force is applied to the tip of the dead bolt 2 in the locked state, the dead guard 4 having a rectangular cross section acts as a resistance member against the rotational moment applied to the dead bolt 2, so that the dead bolt 2 dead The rocking of the rear part from the guard 4 is prevented. As a result, if the dead stopper 10 for restricting the movement of the dead bolt 2 to the unlocking position side is arranged in the rear part, the dead stopper 10 is unlocked by the swing of the dead bolt 2 or the engagement margin is changed. Reduction can be prevented.

  Furthermore, when the fitting notch 5 is formed at the rear end of the dead guard 4 and the rear end edge of the guard insertion long hole 3 of the dead bolt 2 in the locked state is fitted, the dead bolt 2 has a rectangular frame structure at the fitting portion. In addition, since the separation movement between the opposing wall surfaces is restricted, the rigidity and strength to the side are increased, and even when a load from the side is applied to the tip, it is not easily bent. .

  In addition, by arranging the members that affect the maintenance of the locked state by the lateral displacement and movement of the dead bolt 2 such as the dead stopper 10 described above, an unexpected operation occurs with respect to these. Can be surely eliminated.

  ADVANTAGE OF THE INVENTION According to this invention, the tolerance with respect to the extraction operation | movement of a deadbolt can be improved, without bringing about the strength fall of the whole deadbolt.

  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 2 driven by the power unit 11 in the lock case 1 and is fixed to the door body 12 for use.

  As shown in FIG. 4, the lock case 1 is formed in a hollow box shape by connecting a pair of case halves 6, and a mounting plate 13 is fixed to the front end surface. The mounting plate 13 provides a fixing flange to the door body 12 when it is inserted into the door body 12 and fixed, and after being fixed to the door body 12, it is covered with a decorative plate 14.

  The power unit 11 is formed by accommodating a motor, a gear train, and the like (not shown) in the unit case 15, and is driven and controlled by a control signal from a lead wire 16 drawn from the unit case 15. The power generated in the power unit 11 is output to the output shaft 17 of the power unit 11 and rotates the relay gear 18 connected to the output shaft 17. The rotation of the relay gear 18 is transmitted to the dead drive cam 20 via a transmission rod 19 provided with rack gears 19a at both ends.

  As shown in FIGS. 2 and 3, the dead drive cam 20 includes an operation arm 20 a and is driven to rotate between approximately 90 ° locking / unlocking rotation positions with the locking / unlocking operation of the power unit 11. When the dead drive cam 20 is rotationally driven to the locking rotation position side, the operation arm 20a pushes the locking operation protrusion 28a formed on the dead bolt 2 forward, and the locking position where the tip of the dead bolt 2 protrudes forward. Move to. Further, when the dead drive cam 20 is rotationally driven to the unlocking rotation position side from this state, the operation arm 20a pushes the unlocking operation projection 2a of the dead bolt 2 backward, and the dead bolt 2 is shown in FIG. Move to unlocked position.

  Further, in order to drive the dead bolt 2 by the cylinder lock fixed to the door body 12 or the thumb turn device 22, a rotation shaft member such as the cylinder lock 21 is fitted to the rotation center portion of the dead drive cam 20. The fitting hole 20b is formed.

  A link rod 23 is connected to the dead drive cam 20, and one end portion of the link rod 23 penetrates a support column 24 erected on the lock case 1 so as to be freely slidable from the side. The link rod 23 is wound with a compression spring 23b pressed at one end to the column 24 and at the other end to a stopper flange 23a formed on the link rod 23, and the dead drive cam 20 is either unlocked or unlocked. Stop moderation at the end position.

  As shown in FIG. 5, a guide member 25 made of synthetic resin is fixed to the lock case 1 in order to smoothly slide the dead bolt 2 and prevent generation of abnormal noise during operation. The guide member 25 has a guide surface with which the side wall of the dead bolt 2 comes into sliding contact, and is formed in a U-shaped cross section. The guide members 25 having the same shape as that shown in the figure are paired to form a rectangular cylinder shape and surround the entire side wall of the dead bolt 2, but only one guide member 25 is shown in FIG.

  Furthermore, a stopper lever 26 is swingably connected to the lock case 1 around a support shaft 27. The stopper lever 26 has a cylindrical dead stopper 10 at the tip, and is biased counterclockwise in FIG. 5 by a torsion spring (not shown). The stopper lever 26 is pushed up to the upper stroke end position by interfering with the operation arm 20a while the dead drive cam 20 moves from the locking rotation position to the unlocking rotation position.

FIG. 6 shows details of the dead bolt 2. The dead bolt 2 includes a dead body 2b formed by bending a thick steel plate into a U shape, and a reinforcing block 28. The dead main body 2b is fitted to the guide member 25 so as to be freely slidable in the longitudinal direction with the open cross section directed downward, and a stopper step 9 is formed at the upper end of the rear part. As shown in FIG. 3, the stopper step 9 restricts the movement of the dead bolt 2 to the unlocked position by the dead stopper 10 being locked when the dead bolt 2 is in the locked position.
The guide member 25 is formed of a synthetic resin material and is fitted between the reinforcing plate 39 and the dead bolt 2 disposed inside the case 1 as shown in FIG.

  As described above, the dead stopper 10 is driven to the upper stroke end side prior to the initial rotation of the dead drive cam 20 to the unlocking rotation position side, that is, prior to the movement of the dead bolt 2 to the unlocking position side. The locking with the stepped portion 9 is released, and the movement of the dead bolt 2 to the unlocking position side is allowed.

  The unlocking operation projection 2a described above is formed by cutting out the rear end of the dead body 2b in order not to be subjected to an improper destructive force from the outside. The unlocking operation protrusion 2a is formed on one of the opposing wall surfaces.

  On the other hand, the locking operation projection 28a is formed at the rear end of the reinforcing block 28 which is separate from the dead body 2b. The reinforcing block 28 has an appropriate length in the front-rear direction, and is formed with a thickness substantially equal to the interval between the opposing wall surfaces of the dead body 2b so that the lower end open end of the dead body 2b can be closed. A fitting protrusion 28b is provided at the front end of the reinforcing block 28, and is fixed to the dead body 2b using a roll pin 29 or the like.

  As shown in FIG. 3, when a destructive operation force in the pushing direction is applied to the dead bolt 2 in the locked position, the reinforcing block 28 having sufficient rigidity bears the load. For this reason, harmful deformations such as buckling deformation occur in the dead body 2b, causing unexpected operation of the dead drive cam 20 and the like, thereby preventing a problem that the unlocking operation is illegally performed. In addition, the dead load 2 is applied to the dead bolt 2 because the dead stopper 10 and the operation arm 20a of the dead drive cam 20 disposed at the upper and lower end positions and having an appropriate interval in the vertical direction cooperate to bear the load against the breaking load. Since the generation of the rotational torque in the direction in which the other end moves up and down around the one end is prevented, the occurrence of an unexpected malfunction to the peripheral members due to the rotation of the dead bolt 2 in the direction is prevented.

  As shown in FIGS. 6 and 7, the dead main body 2 b is provided with a long guard insertion long hole 3 at the front and rear, and the dead guard 4 is inserted into the guard insertion long hole 3. The dead guard 4 is formed of a steel plate, and the attachment pieces 4a formed on both left and right ends are inserted into the attachment holes 7 of the lock case 1 and fixed in a horizontal position at a predetermined position.

  The dead guard 4 includes a fitting notch 5 at the rear end edge. As shown in FIG. 7 (b), when the dead bolt 2 is moved to the locking position, the fitting notch 5 is fitted to the rear end edge of the guard insertion long hole 3 of the dead body 2b, and between the opposing wall surfaces at 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 8 is provided at the front edge of the dead guard 4 so as to protrude further forward from the attachment piece 4a. As shown in FIG. 7, the anti-rolling piece 8 abuts against the back surface of the lock case 1 in the mounted state, and prevents deformation of the dead body 2b due to rolling of the dead guard 4 itself.
As shown in FIG. 8A, the dead guard 4 can be formed by being bent integrally with the steel plate of the lock case 1.
Moreover, as shown in FIG.8 (b), the reinforcement plate 39 formed with the steel plate can be bend-processed, and it can also be set as the dead guard 4. FIG.
In these cases, the number of parts can be reduced, and the assembly is improved because the dead guard 4 is stably arranged.

  The sickle member 30 is pivotally supported around the support shaft 31 on the dead bolt 2 configured as described above. As shown in FIG. 6, the sickle member 30 is formed by fixing cover plates 33 on both surfaces of the core plate portion 32, and includes locking claws 30 a and operating protrusions 30 b at the front and rear ends. In this embodiment, the core plate portion 32 is formed of a single thick steel plate, but it is also possible to form a stack of a plurality of sheets, and the resistor housing hole opened in the core plate portion 32 The cutting resistor 34 is inserted into 32a. The cutting resistor 34 is formed into a pin shape from a material having excellent cutting resistance such as hardened steel, and is inserted into a resistor housing hole 32a formed as a through hole in the core plate portion 32, and then the cover plate 33. Dropping is prevented by fixing.

  A fitting recess 30 c is formed at the rear end of the sickle member 30. The fitting recess 30 c is formed in a groove shape by extending the rear end of the cover plate 33 further rearward from the rear end of the core plate portion 32.

  When the deadbolt 2 is in the unlocked position, the sickle member 30 has a locking claw 30a stored in the deadbolt 2 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 30b climbing on the interference portion 35 formed on the guide member 25. From this state, the dead bolt 2 moves to the locking position side. Then, as shown in FIG. 3, the operating protrusion 30 b comes into contact with the sickle operating protrusion 36 formed on the guide member 25, and applies a rotational force to the sickle member 30 counterclockwise. At this time, since the sickle operating protrusion 36 is formed on the guide member 25 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 30, the locking claw 30a of the sickle member 30 protrudes from the lower end edge of the dead bolt 2, and thereafter the strike 37 is in the dead bolt 2 detaching direction, that is, the left side in FIG. Is moved to the peripheral wall of the strike hole 37a, the movement in this direction is restricted.

  1 and 3, when the dead bolt 2 is in the locking position and the sickle member 30 is in a position where the sickle member 30 can be locked with the peripheral wall of the strike hole 37a, And it arrange | positions so that it may be located inside and outside the lock case 1 on both sides of the decorative plate 14. As a result, the cutting operation by the blade inserted in the gap between the door 12 and the door frame 38 is caused by the cutting resistance of the cutting resistor 34 and the idle resistance of the cutting resistor 34 accompanying the cutting operation of the blade. Eliminated.

  Further, as shown in FIG. 6, when the sickle member 30 is in a position where it can be locked with the peripheral wall of the strike hole 37 a, the fitting protrusion 28 b of the reinforcing block 28 is fitted into the fitting recess 30 c of the sickle member 30. . In this state, since the front part and the rear part of the dead bolt 2 are reinforced seamlessly by the sickle member 30 and the reinforcing block 28, even if a lateral destructive force is applied to the dead bolt 2, it may 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. 8A-8A sectional view showing another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock case 2 Dead bolt 3 Guard insertion long hole 4 Dead guard 5 Fitting notch 6 Case half body 7 Mounting hole 8 Anti-rolling piece 9 Stopper part 10 Dead stopper

Claims (5)

A dead bolt having a U-shaped cross-section that is housed in the lock case and is driven to translate between the lock and unlock positions, and the tip projects forward from the lock case at the lock position;
A dead guard that protrudes from the wall surface of the lock case into the lock case and is inserted through a long guard insertion slot before and after the dead bolt is opened on the opposite side wall;
The dead guard is a locking device having a rectangular cross-sectional shape with a short side in the short side direction of the guard insertion long hole.   The locking device according to claim 1, wherein the dead guard is formed with a fitting notch into which a rear end edge of the guard insertion long hole is fitted when the dead bolt moves to the locking position. The lock case is formed by stacking case halves,
3. The lock device according to claim 1, wherein the dead guard is fixed to the lock case by inserting both ends into attachment holes formed in the case half.   The locking device according to claim 3, wherein the dead guard is provided with a roll prevention piece that extends forward and contacts the back surface of the case half. When the dead bolt is in the locked position, it has a dead stopper that locks on the stopper step formed on the dead bolt and restricts the movement to the unlocked position side,
The locking device according to any one of claims 1 to 4, wherein the dead guard is disposed in front of the dead stopper.

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