JP5064048B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device.

The thing of patent document 1 is known as a locking device provided with the dead bolt of the U-shaped cross section. In this conventional example, a finger-like projecting portion and a fin-like projecting portion are formed at the rear end of the dead bolt, and when the dead cam (dead drive cam) is rotated by a cylinder lock or the like, the dead cam actuating arm moves to the finger-like projection. The part or the fin-like projection part is pushed out, and the locking and unlocking operation of the dead bolt is performed.
JP 2004-68339 A

  In the above-described conventional example, when the dead bolt is in the locked state and the dead bolt is loaded with a pushing force in the unlocking direction, the fin-like projection portion abuts the operating arm and the movement in the pushing direction is restricted. . However, in the conventional example in which the fin-like projection part is formed in an open cross-sectional portion having a U-shaped cross section to form a thin plate, the buckling strength of the fin-like projection is not high, so that a large pushing force acts on the dead bolt. In some cases, there is a risk of buckling.

  The buckling deformation of the fin-like projection part may cause the malfunction of the peripheral member due to the interference with the peripheral member in addition to the movement of the dead bolt to the unlocking position side due to the deformation of itself, leading to an unexpected unlocking operation. There is sex.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide a lock device that can exhibit high resistance against an improper pushing force load of a dead bolt.

  The dead bolt 4 of the locking device is formed in a U-shaped cross section, and is translationally driven by the dead drive cam 3 that is rotated during locking / unlocking operation, and moves between the locking / unlocking positions. The translation drive of the dead bolt 4 is performed by pressing the locking driven portion 5a or the unlocking driven portion 4a provided on the dead bolt 4 by the dead operation arm 1 of the dead drive cam 3. The driven portion 5 a is formed on the reinforcing block 5 that is fixed to the dead bolt 4.

  In this invention in which the dead operation arm 1 formed on the dead drive cam 3 presses the driven portion 4a provided on the dead bolt 4 to drive the dead bolt 4 in translation, a complicated guide or the like is not required. Can be simple.

Further, since the reinforcing block 5 with which the dead operation arm 1 abuts when the dead bolt 4 is in the locked position is laid and fixed between the opposing wall surfaces of the dead bolt 4, the portion of the portion where the reinforcing block 5 is fixed is fixed. The dead bolt 4 cross section has a closed rectangular shape. In this state, even when the dead bolt 4 is loaded with a large pushing force into the unlocking position side, that is, into the lock case 2, either one of the opposing wall surfaces is not inadvertently deformed, No movement to the unlocking position side due to interference with parts or deformation of the dead bolt 4 itself does not occur.
Moreover, according to the present invention,
A dead drive cam equipped with a dead operation arm and rotatably mounted in the lock case;
A dead bolt having a U-shaped cross section that is pushed by the dead operation arm and is driven to translate between the locking and unlocking positions, and the tip projects forward from the lock case at the locking position;
A reinforcing block which is constructed and fixed between opposing side walls so as to close the open cross-sectional end of the dead bolt;
It is also possible to provide a locking device in which the object to be pressed by the dead operation arm during the locking operation of the dead bolt is formed on the reinforcing block.

  Furthermore, when the stopper step 7 is formed at the closed cross-sectional end of the dead bolt 4 and the dead stopper 6 is locked in the locked state, the upper and lower ends when the pushing force acts on the dead bolt 4 In order to bear the pressing force at the edge, no vertical rotational force is generated in the dead bolt 4. For this reason, the malfunction of the adjacent member by the inclination of the deadbolt 4 can be prevented reliably.

  Further, when the fitting portion 9 is formed on the front edge of the reinforcing block 5 and fitted to the rear end of the sickle member 8, the sickle member 8 and the reinforcing block 5 are connected inside the dead bolt 4. As a result, since the sickle member 8 and the reinforcing block 5 function as a reinforcing member that works as a unit, the bending force, particularly the strength and rigidity when a destructive force is applied to the tip of the dead bolt 4 from the side, is improved. It can be improved dramatically.

  The fitting portion 9 may be a protrusion formed on a part of the sickle member 8, or a concave groove fitted to the entire rear end portion of the sickle member 8, or a concave groove formed on the sickle member 8 side. It can be formed as a fitting protrusion.

  ADVANTAGE OF THE INVENTION According to this invention, high tolerance can be exhibited with respect to the improper pushing force load of a dead bolt.

  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 10 in the lock case 2 and is used by being fixed to the door body 11.

  As shown in FIG. 4, the lock case 2 is formed in a hollow box shape by connecting a pair of case halves 12, and a mounting plate 13 is fixed to the front end surface. The mounting plate 13 provides a fixing flange to the door body 11 when it is inserted into the door body 11 and fixed. After the fixing plate 13 is fixed to the door body 11, the mounting plate 13 is covered with the decorative plate 14.

  The power unit 10 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 10 is output to the output shaft 17 of the power unit 10 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 3 through a transmission rod 19 provided with rack gears 19a at both ends.

  As shown in FIGS. 2 and 3, the dead drive cam 3 includes a dead operation arm 1 and is driven to rotate between approximately 90 ° locking / unlocking rotation positions in accordance with the locking / unlocking operation of the power unit 10. When the dead drive cam 3 is rotationally driven to the locking rotation position side, the dead operation arm 1 pushes the locking driven portion 5a fixed to 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 3 is rotationally driven from this state to the unlocking rotation position side, the dead operation arm 1 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 20 fixed to the door body 11 or the thumb turn device 21, a rotation shaft member such as the cylinder lock 20 is fitted to the rotation center portion of the dead drive cam 3. For this purpose, a fitting hole 3a is formed.

  A link rod 22 is connected to the dead drive cam 3, and one end portion of the link rod 22 penetrates through a support column 23 erected on the lock case 2 so as to be freely slidable from the side. The link rod 22 is wound with a compression spring 24 pressed at one end on the column 23 and at the other end on a stopper flange 22a formed on the link rod 22, and the dead drive cam 3 is locked or unlocked by any stroke. 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 2 in order to smoothly slide the dead bolt 4 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 4 comes into sliding contact, and is formed in a U-shaped cross section. The guide member 25 is formed in a rectangular cylinder 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 25 is shown in FIG.

  Further, a stopper lever 26 is swingably connected to the lock case 2 around a support shaft 27. The stopper lever 26 has a cylindrical dead stopper 6 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 dead operation arm 1 while the dead driving cam 3 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 25 so as to be freely slidable in the longitudinal direction with the open cross section facing downward, and a stopper step 7 is formed at the upper end of the rear part. As shown in FIG. 3, the stopper step 7 restricts the movement of the dead bolt 4 toward the unlocked position by the dead stopper 6 being locked when the deadbolt 4 is in the locked position.

  As described above, the dead stopper 6 is driven to the upper stroke end side prior to the initial rotation of the dead drive cam 3 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 7 is released, and the dead bolt 4 is allowed to move to the unlocked position side.

  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 5 a is formed at the rear end of the reinforcing block 5, which is separate from the dead bolt 4. The reinforcing block 5 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 bolt 4 so that the lower end open end of the dead bolt 4 can be closed. The reinforcing block 5 has a fitting protrusion (fitting portion 9) at the front end, and is fixed to the dead bolt 4 using a roll pin 28 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 5 having sufficient rigidity bears the load. For this reason, a harmful deformation such as a buckling deformation occurs in the dead bolt 4 to cause an unexpected operation of the dead drive cam 3 and the like, and a malfunction in which the unlocking operation is illegally performed is prevented. In addition, the dead load is applied to the destructive load because the dead stopper 6 disposed at the upper and lower end positions and appropriately spaced in the vertical direction and the dead operation arm 1 of the dead drive cam 3 cooperate to bear the 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 4b at the front and rear, and a dead guard 29 is inserted into the guard insertion long hole 4b. The dead guard 29 is formed of a steel plate, and mounting pieces 29b formed on both left and right ends are inserted into the mounting openings 2a of the lock case 2 and fixed in a horizontal position at a predetermined position.

  The dead guard 29 includes a fitting notch 29a 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 29a is fitted to the rear end edge of the guard insertion long hole 4b of the dead bolt 4, 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 rolling prevention piece 29c that protrudes further forward from the attachment piece 29b is provided at the front edge of the dead guard 29. As shown in FIG. 7, the anti-rolling piece 29c abuts against the back surface of the lock case 2 in the mounted state, and prevents deformation of the dead bolt 4 due to rolling of the dead guard 29 itself.

  The sickle member 8 is pivotally supported around the support shaft 30 on the dead bolt 4 configured as described above. As shown in FIG. 6, the sickle member 8 is formed by fixing cover plates 32 on both surfaces of the core plate portion 31, and includes locking claws 8 a and operating protrusions 8 b at front and rear ends. In this embodiment, the core plate portion 31 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 31. A cutting resistor 33 is inserted into 31a. The cutting resistor 33 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 31 a formed as a through hole in the core plate portion 31, and then the cover plate 32. Dropping is prevented by fixing.

  A fitting recess 8 c is formed at the rear end of the sickle member 8. The fitting recess 8 c is formed in a groove shape by extending the rear end of the cover plate 32 further rearward from the rear end of the core plate portion 31.

  When the deadbolt 4 is in the unlocked position, the sickle member 8 is stored in the deadbolt 4 and the strike 36 of the locking claw 8a during the locking operation as shown in FIG. Take a retracted posture to prevent collisions with. As shown in FIG. 2, the retracted posture is maintained by the operating protrusion 8b climbing on the interference portion 34 formed on the guide member 25. From this state, the dead bolt 4 moves to the locking position side. Then, as shown in FIG. 3, the operating protrusion 8 b comes into contact with the sickle operating protrusion 35 formed on the guide member 25, and applies a rotational force to the sickle member 8 counterclockwise. At this time, since the sickle operating protrusion 35 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, the rotation of the sickle member 8 causes the locking claw 8 a of the sickle member 8 to protrude from the lower end edge of the dead bolt 4, and thereafter the strike 36 is in the dead bolt 4 detaching direction, that is, the left side in FIG. Is moved to the peripheral wall of the strike hole 36a, the movement in this direction is restricted.

  1 and 3, when the dead bolt 4 is in the locking position and the sickle member 8 is in a position where it can be locked with the peripheral wall of the strike hole 36a, And it arrange | positions so that it may be located in and out of a case on both sides of the decorative plate 14. FIG. As a result, the cutting operation by the blade inserted in the gap between the door body 11 and the door frame 37 is caused by the cutting-resistant cutting strength of the cutting resistor 33 and further by the idling of the cutting resistor 33 accompanying the cutting operation of the blade. Eliminated.

  Furthermore, as shown in FIG. 6, when the sickle member 8 is in a position where it can be locked with the peripheral wall of the strike hole 36 a, the fitting protrusion 9 of the reinforcing block 5 is fitted into the fitting recess 8 c of the sickle member 8. . In this state, since the front part and the rear part of the dead bolt 4 are reinforced seamlessly by the sickle member 8 and the reinforcing block 5, 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 Dead operation arm 2 Lock case 3 Dead drive cam 4 Dead bolt 5 Reinforcement block 6 Dead stopper 7 Stopper part 8 Sickle member 9 Fitting part

Claims (4)

A dead drive cam equipped with a dead operation arm and rotatably mounted in the lock case;
A dead bolt having a U-shaped cross section that is pushed by the dead operation arm and is driven to translate between the locking and unlocking positions, and the tip projects forward from the lock case at the locking position;
And a reinforcement block,
The reinforcing block has an appropriate length that is less than the entire length of the dead bolt in the longitudinal direction of the dead bolt, and is laid and fixed between opposing side walls so as to close the open cross-sectional end of the dead bolt,
And the locking device which formed in the said reinforcement block the press object of the dead operation arm at the time of the locking operation of the said dead bolt.   A stopper step for restricting the movement of the dead bolt to the unlocking position by locking the dead stopper driven to the unlocking position by the unlocking rotation operation of the dead drive cam at the closed cross-sectional end of the dead bolt The locking device according to claim 1, wherein: Having a sickle member protruding from the side edge of the dead bolt when the dead bolt is in the locked position;
The locking device according to claim 1, wherein a fitting portion that fits at a rear end of the sickle member is formed at a front edge of the reinforcing block at least when the sickle member is in a protruding posture. A dead drive cam equipped with a dead operation arm and rotatably mounted in the lock case;
A dead bolt having a U-shaped cross section that is pushed by the dead operation arm and is driven to translate between the locking and unlocking positions, and the tip projects forward from the lock case at the locking position;
A reinforcing block constructed and fixed between opposing side walls so as to close the open cross-sectional end of the dead bolt;
A sickle member protruding from the side edge of the dead bolt when the dead bolt is in the locked position;
The locking device is formed with a fitting portion that is fitted to the rear end of the sickle member when at least the sickle member is in a protruding posture at the front edge of the reinforcing block.

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