JP5225129B2 - Door lock mechanism - Google Patents

Description

  The present invention relates to a door locking mechanism, and in particular, when an external force such as earthquake or vibration is applied to the lock box, a locking lever (locking arm) that locks the latch member in a locked state, The present invention relates to a door locking mechanism including a braking member that suppresses rotation in the unlocking direction.

  Patent Document 1 discloses a door locking mechanism in which the tip of a locking lever 8 pivotally supported in a lock box 2 via a first support shaft 7 locks the latch member 1 during locking. The locking lever 8 is formed in a fingertip shape having a predetermined length so that its center of gravity is located in front of the first support shaft 7. A short hook-like rear end engaging portion of the fingertip-shaped locking lever 8 is formed. In 8e, the rear end surface of the free end portion 14 is supported by the fixed shaft 12 positioned above the upper side of the latch member 1 and extends downward in the form of an arm through the bent portion. An unlocking control lever 13 that engages with the rear end engaging portion 8e of the shape is disposed, and further, in the vicinity below the base end portion of the locking lever 8 (space on the bottom wall side of the lock box). A brake lever 23 having a Z-shape or an L-shape as a whole is pivotally supported via a two-support shaft 22, and the center of gravity of the brake lever 23 is the second support shaft. 2 is set so as to be located behind (the rear wall side of the lock box) and when the lock box is in a normal state where no external vibration is applied to the lock box, The front end is biased by a return spring 23 wound around the second support shaft 22 so as to be away from the bottom surface of the latch member 1. On the other hand, when vibration is applied to the lock box from the outside, There is disclosed a door locking mechanism that applies an impact force so as to prevent the distal end portion of the locking lever 8 from moving away from the stepped engagement portion of the latch member 1 due to movement.

  The above configuration has the same purpose as that of the present invention. For example, the substantially L-shaped braking lever 23 is disposed below the base end portion of the locking lever 8 (space on the bottom wall side of the lock box). Since the two support shafts 22 are disposed, there is a problem that the space on the lower side of the lock box cannot be effectively used.

  In addition, as described in Patent Document 1, this type of door locking mechanism is used as, for example, an automatic locking device for a hotel door. Generally, a trigger and a latch member are generally provided in a space on the lower side of a lock box. When retracted into the lock box, members such as a stopper member that temporarily captures the latch member in conjunction with the trigger and a handle cam that rotates by the operating force of the operating member are appropriately incorporated. Therefore, there is a problem that the brake lever 23 has to be incorporated in the lock box so that the function of the automatic locking device for a hotel door is not hindered or interferes with each of the above members (reference numeral is that of the patent document).

  Further, the brake lever 23 described in Patent Document 1 is formed in a Z-shape or L-shape as a whole, and receives the lower surface of the fingertip-shaped locking lever 8 on the upper surface of the tip portion, and by the rotational angular motion of gravity. The impact force (kinetic energy) from the fingertip-shaped lock lever 8 is canceled by so-called physics rotational frictional resistance, but the space on the bottom wall side of the lock box is a limited space. Therefore, the shape and length of the rear end portion behind the second support shaft 22 of the locking lever 8 are limited as such, and as a result, the braking function of the braking lever 23 cannot be fully exhibited. was there.

  Next, Patent Document 2 also describes a door locking mechanism having the same purpose as that of the present invention. For example, in FIG. 1 of Patent Document 2, an inverted L-shaped hammer lever 22 is disposed in the vicinity of the dharma, and the hammer lever 22 is pivotally supported by a support shaft 23 at its lower end, Thus, the matter of pressing the rear end inclined surface 26 corresponding to the hip of the horse-shaped drive plate 13 is described.

In Patent Document 2, the hammer lever 22, that is, the brake lever 22 for the locking lever 5 is arranged in the space on the upper side of the lock box, so that the problems of the Patent Document can be solved.
However, as apparent from FIG. 1 of Patent Document 2, the hammer lever 22 indirectly inhibits the locking lever 5 via the engagement pin 21 and the horse-shaped drive plate 13 positioned above the latch member 2. Therefore, the number of parts increases, and there is a problem that the space on the upper side of the lock box cannot be effectively used (reference numerals are those of patent documents).

JP 2006-97456 A JP 2007-332648 A

  The intended purpose of the present invention is to solve the problems of Patent Document 1 and Patent Document 2 by devising the structure and arrangement of the lock lever and brake lever, and when vibration is applied to the lock box. It is to make the brake lever function quickly and reliably.

  The door locking mechanism according to the present invention is a door locking mechanism in which the tip of the locking lever 5 pivotally supported in the lock box via the first support shaft 4 locks the latch member 2 during locking. In this case, a center portion 21b of a vertically long friccost top 21 is pivotally supported on a second support shaft 15 which is spaced apart from the first support shaft 4 by a predetermined distance. The upper end portion 21c side having the weight portion 21d or the weight 26 abuts against the support member 30 in the lock box in a state of being constantly urged so as to maintain a predetermined posture by the spring force of the directly or indirectly wound fricco spring 29. On the other hand, the lower end portion 21a having a stopper function faces the gap 7 between the horizontal contact portion 5a provided at the distal end portion of the locking lever 5 and the first support shaft 4, and the lock box 1 Exciting force is applied to the frecolic hopper 21 due to the rotational moment. When the predetermined posture is broken against the spring force of the frico spring 29, the lower end portion 21a quickly stands up against the contact portion 5a to prevent the locking lever 5 from rotating in the unlocking direction. Features.

(A) The brake lever 21 is a pendulum type whose central portion 21b is pivotally supported by a second support shaft 15 located above the first support shaft 4 for the locking lever, and its lower end portion is at the time of vibration. Since 21a directly presses the front-end | tip part of the locking lever 5, each problem of patent document 1 and patent document 2 is eliminated. Further, when vibration is applied to the lock box, the braking lever 21 quickly loses its posture, and the braking lever can be pressed like a stopper.
(B) The invention according to claim 2 can ensure the function of the brake lever.
(C) The invention according to claim 3 can obtain an excitation force from one link support shaft 30 constituting the link mechanism of the locking / unlocking mechanism. In other words, since the upper end portion 21c of the friccost upper 21 is temporarily fixed to the link support shaft 30 fixed to the lock box under normal conditions, the flick cost upper 21 is moved to the support shaft 30 during vibration. Therefore, the impact force is immediately propagated to the weight portion 21d on the upper end 21c side, and tilts quickly against the spring force of the frico spring 29 set with a relatively light spring force. Further, it is not necessary to provide a special member for applying the excitation force in the lock box.
(D) In the invention according to claim 4, at the time of unlocking, the locking lever 5 does not receive the sliding contact resistance from the frecoys upper 21, and there is no hindrance to its rotation.

FIG. 1 to FIG. 7 are explanatory views showing the best embodiments of the present invention.
Schematic explanatory drawing in a locked (locked) state. The schematic explanatory drawing of the principal part. The schematic explanatory drawing of the principal part (locking lever 5). Schematic explanatory drawing of the principal part (free cost upper 21). Schematic explanatory drawing at the time of unlocking. Schematic explanatory drawing at the time of vibration in the locked (locked) state. Schematic explanatory drawing which shows the effect | action of the principal part.

  The best mode for carrying out the invention will be described with reference to FIGS. First, FIG. 1 is a schematic explanatory diagram of a locked (locked) state. FIG. 2 is a schematic explanatory view of the main part in the locked (locked) state. Further, FIG. 3 is a schematic explanatory view of a main part (locking lever 5), and FIG. 4 is a schematic explanatory view of a main part (frocost top 21 as a braking lever).

  At the time of locking, the latch head 2a of the latch member 2 (which also functions as a dead bolt in the present embodiment) 2 provided horizontally in the central portion (including the portion near the central portion) in the lock box 1 It protrudes from the front 1a and engages with a receiving tool (not shown) on the door frame 3 side.

  In this locked state, the distal end portion of the locking lever 5 pivotally supported by the first support shaft 4 positioned above the hook-shaped latch bolt 2b and the frame-shaped latch board 2c constituting the latch member 2. (Here, the portion extending forward from the first support shaft) locks the stepped engaging portion 6 formed by the rear end surface of the latch head 2a and the fixed front end surface of the latch board 2c.

  First, as shown in FIG. 3, for example, the locking lever (locking board) 5 of the present embodiment is formed by appropriately bending a long plate in the horizontal and vertical directions. That is, 5b is a shaft hole formed at the center portion (including the vicinity of the center portion) of the locking lever 5 and having a boss portion 5c projecting annularly on the vertical side wall on the near side. The shaft hole 5b has a first support. The shaft 4 penetrates.

  Reference numeral 5a denotes a projecting piece-like contact portion provided in the horizontal direction on the upper side of the distal end portion of the locking lever 5, and this contact portion 5a has a predetermined gap with respect to the boss portion 5c or the first support shaft 4. 7. The contact portion 5a is formed, for example, by bending the upper side of the tip of the locking lever 5 approximately 90 degrees in the horizontal direction. Of course, the design of the shape of the contact portion 5a can be arbitrarily changed.

  Reference numeral 5d denotes a first engaging protrusion that extends upward from the upper side of the central portion of the locking lever 5 in the shape of a thumb, and the first engaging pin 8 is fixed to the first engaging protrusion 5d, for example. Is provided. With reference to the first engagement protrusion 5d, the upper end portion 5e on the left side is over the one end portion 9a of the locking spring 9 having the central portion 9b wound around the boss portion 5c. On the other hand, the movable contact piece 10a of the microswitch 10 abuts on the protruding piece portion 5f that is bent in the horizontal direction on the opposite side (the other side) to the right contact portion 5a.

  Further, a fingertip having a second engagement pin 13 that engages with an engagement portion 12 a of the rotating plate 12 that constitutes the click means 11 at the slightly wide rear end portion that is provided continuously with the central portion of the locking lever 5. A second engagement protrusion 5g having a shape is provided.

  As shown in FIG. 2, the other end 9c of the locking spring 9 is in pressure contact with a non-supporting pin near one side wall of the microswitch 10, so that the locking lever 5 is always engaged with the latch member 2. It is urged in a direction to engage the portion 6.

  Next, as shown in FIG. 4, for example, the brake lever 21 according to the present embodiment employs a vertically long free cost upper 21. A center portion 21 b of the free cost upper 21 is pivotally supported by a second spindle 15 that is located above and spaced apart from the first spindle 4 by a predetermined distance. With reference to FIG. 4, the configuration of the free cost upper 21 will be described. 21b is a central portion (including a portion near the central portion), 21a is a lower end portion that extends substantially straight downward from the central portion, while 21c is an upper end that is partially bent or not bent from the central portion and extends substantially straight upward. Reference numeral 21d denotes a plate-like weight portion extending horizontally or obliquely from the upper end to the rear wall 1b of the lock box 1.

  The central portion 21b is formed with a shaft hole 23 having a boss portion 22 projecting annularly on the vertical side wall in the same manner as the locking lever 5, and the second support shaft 15 is formed in the shaft hole 23. To penetrate. A spring receiving portion 24 for receiving one end portion 29a of the frico spring 29 around which the central portion 29b is wound is provided on the front side on one side facing the front 1a of the friccost top 21 near the boss portion 22. . Note that the other end portion 29 c of the flico spring 29 is also in pressure contact with a numberless support pin near one side wall of the microswitch 10.

  In addition, in the present embodiment, the lower end portion 21a functions as a stopper that prevents the lock lever 5 from rotating in the unlocking direction when vibration is applied to the lock box 1 and the vibration is applied to the frecolic upper 21. Fulfill. Therefore, the lower end portion 21a is formed slightly wider, and the lower end surface as the stopper portion is formed in an appropriate shape such as a fingertip shape, an arc shape, a surface shape, or a downward small convex shape. Further, one side of the upper end portion 21c facing the front 1a is slightly cut away, and the cutout surface 25 abuts on the support member 30 in the lock box.

  By the way, in the present embodiment, the support member 30 pivotally supports a first link 33 that is linked to an operating rod 32 of a drive source (solenoid) 31 that constitutes a locking / unlocking mechanism as shown in FIG. It is a fixed shaft. The notch surface 25 hits the outer surface of the first fixed shaft 30. Further, a weight 26 is screwed to the upper surface of the plate-like weight portion 21d.

  Therefore, the freco-sipper 21 as a brake lever is pivotally supported at its central portion 21b on the second support shaft 15, and the freco-stopper 21 is mounted on the second support shaft directly or indirectly. The upper end portion 21c side having the weight portion 21d or the weight 26 is in contact with the support member 30 in the lock box 1 while being constantly urged so as to maintain a predetermined posture by the spring force of the lower end portion, while the lower end portion having a stopper function 21a faces the gap 7 between the contact portion 5a of the front end of the locking lever 5 located below the frecoy hopper 21 and the first support shaft 5 or the boss portion 5c for the locking lever. When the vibration force is applied to 1 and the free cost upper 21 instantaneously breaks the predetermined posture against the spring force of the fricco spring 29 due to the rotational moment, the lower end portion 21a Stand in the way to a separatory 5a to prevent rotation of the unlocking direction of the locking lever 5 (see FIGS. 6 and 7).

  In other words, when an external excitation force is applied to the lock box 1, the locking lever 5 is moved from the engagement portion 6 of the latch member 2 with the locking shaft 5 as a fulcrum by the excitation force. Even if it tries to move in the direction of separation, the contact portion 5a of the locking lever 5 is restrained or braked by the lower end portion 21a of the slightly costly tilted fricco-supper 21.

  Next, the constituent members of the application / unlocking mechanism will be briefly described with reference to FIG. The door locking mechanism X of the present embodiment is applied to, for example, an electric lock. Therefore, the locking / unlocking mechanism includes a solenoid 31 provided horizontally in the upper space in the lock box 1, an operating rod 32 of the solenoid, and a first link 33 in the vertical direction connected to the tip of the operating rod. The lower end portion of the first link 33 and the second link 34 whose upper and lower ends are connected to or engaged with the first engaging protrusion 5d of the locking lever 5, respectively.

  A central portion of the second link 34 interposed between the first link 33 and the locking lever 5 is pivotally supported by the second support shaft 15. In addition, since the application of the door locking mechanism X is not limited to an electric lock, drawings and explanations of known and new matters relating to other locking / unlocking mechanisms are omitted.

  In the locking / unlocking mechanism, when the locking shown in FIG. 1 is performed, the operating rod 32 of the solenoid 31 extends in the arrow direction (front side). Then, the locking lever 5 rotates by a predetermined amount in the locking (locking) direction via the link mechanism (the first link 33 and the second link 34) and against the spring force of the locking spring 9, and its tip The portion engages with the engaging portion 6 of the latch member 6.

  Thus, when the normal state in which no vibration is applied to the lock box 1, the upper end 21c is temporarily fixed to the support member 30 and the lower end 21a is the locking lever. 5 faces the gap 7 between the contact portion 5a and the boss portion 5c, so that the unlocking direction force from the driving source 31 or the operating force of the operating member (not shown) is applied to the locking lever 5. There is no problem even if it acts.

  That is, as shown in FIG. 5, when unlocking, when the operating rod 32 of the solenoid 31 moves in the unlocking direction (stretching direction indicated by the arrow), the locking lever 5 is moved through the link mechanisms 33 and 34. Even if the support shaft 4 is rotated in the unlocking direction (clockwise) with the fulcrum 4 as a fulcrum, the lower end portion 21a of the freco-sipper 21 enters the gap 7. The configuration of the latch member 2 (the latch head 2a, the latch bolt 2b, the latch board 2c, the latch biasing spring, the spring receiving piece, etc.) is a well-known matter and will not be described in detail. For example, in FIG. 1, 40 is a trigger disposed below the latch member 2, and 50 is disposed in the upper space of the lock box 1 so as to engage with the click means 11 positioned above the latch member 2. Dharma.

  In the example shown in the embodiment of the invention, the locking lever (locking board) 5 has its tip portion directly engaged with the engaging portion 6 of the latch member 2, but is shown on the first support shaft 4. May be indirectly engaged through a locking lever (a locking piece cooperating with the locking lever).

  In addition, the spring force of the fricco spring 29 for the frecolic upper is set to be weaker than the spring force of the lock spring 9 for the lock lever 5, but in a normal state, it is substantially perpendicular to the support member (for example, the fixed shaft) 30. Spring force that biases the free cost upper 21 to the initial position (substantially vertical posture position) so as to come into contact with.

  In addition, the weight 26 is fixed to the plate-like weight portion 21d protruding in the horizontal direction (this embodiment) or obliquely from the upper end portion 21c of the frecost top 21, but depending on the weight of the plate-like weight portion 21d, The weight 26 is not necessary.

  1, 5, and 6, on the lower side of the lock box 1, when the trigger 40 and the latch member 2 are retracted into the lock box 1, the latch member is interlocked with the trigger 40. A member such as a stopper member that temporarily captures 2 and a handle cam that is rotated by the operating force of the operating member are appropriately incorporated, but these members and latch member capturing mechanisms incorporated in the lower part of the lock box 1 Is omitted because it is not a specific requirement of the present invention.

  The present invention is mainly used in the fields of locks and joinery.

X ... Door locking mechanism, 1 ... Lock box, 1a ... Front, 2 ... Latch member, 2a ... Latch head, 4 ... First support shaft, 5 ... Locking lever, 5a ... Contact part, 5b ... Shaft hole ( (Center part), 5c ... boss part, 5d ... first engagement protrusion, 5f ... protrusion part, 5g ... second engagement protrusion, 6 ... engagement part, 7 ... gap, 9 ... lock spring, 10 DESCRIPTION OF SYMBOLS ... Microswitch, 10a ... Movable contact piece, 11 ... Click means, 12 ... Rotating plate, 12a ... Engagement part, 15 ... 2nd spindle, 21 ... Free cost upper, 21a ... Lower end part, 21b ... Center part, 21c ... upper end portion, 21d ... weight portion, 22 ... boss portion, 24 ... spring receiving portion, 25 ... notch surface, 26 ... weight, 29 ... frico spring, 30 ... support member, 31 ... drive source (solenoid), 32 ... operating rod 33 ... 1st link, 34 ... 2nd link.

Claims (4)

At the time of locking, in the door locking mechanism in which the front end of the locking lever that is pivotally supported in the lock box via the first supporting shaft locks the latch member, the locking lever is locked upward with respect to the first supporting shaft. The center portion of the vertically long friccost top is pivotally supported on a second spindle that is spaced apart by a predetermined distance, and the friccost top assumes a predetermined posture by the spring force of a frico spring wound directly or indirectly on the second spindle. The weight portion or the upper end side having the weight is in contact with the support member in the lock box while being constantly biased so as to maintain, while the lower end portion having the stopper function is provided at the distal end portion of the lock lever 5. It faces the gap between the horizontal contact portion and the first support shaft, and an excitation force is applied to the lock box. When the predetermined posture is lost, the lower end is quickly abutted against the contact. Door for locking mechanism, characterized in that to prevent rotation of the unlocking direction of the locking lever stand in the way to the part. 2. The door locking mechanism according to claim 1, wherein the weight portion or the weight is a weight portion or a weight fixed to the weight portion protruding in the horizontal direction or the oblique direction from the upper end portion of the frecker top. The door support member according to claim 1, wherein the support member in the lock box is a first fixed shaft that pivotally supports a first link that is linked to an operating rod of a solenoid that constitutes a locking / unlocking mechanism. Locking mechanism. 4. The locking lever according to claim 3, wherein when the operating rod of the solenoid constituting the locking / unlocking mechanism moves in the unlocking direction, the locking lever moves in the unlocking direction with the first support shaft as a fulcrum via the link mechanism. The door locking mechanism is configured to rotate, and at this time, a lower end portion of the frecolic upper enters into a gap between a contact portion of the locking lever and the first support shaft.

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