JP2004107987A - Main locking device for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To impart a feeling of click to a top joint by an urging spring installed at a dead bolt while solving the unstable state of the moved dead bolt. <P>SOLUTION: A movable shaft guided to a lock case is installed at the dead bolt, and the urging spring in which one end section is brought into press-contact with a spring-receiving engaging section for the dead bolt while the other end section is brought into press-contact with a spring receiving section continuously connected to a driving arm for the top joint are mounted on the movable shaft. The urging spring has a click normal-position function, in which the front end section of the driving arm for the top joint is pushed powerfully against the front-side notched engaging surface of the dead bolt, and a dead stable function, in which the dead bolt is pushed in the projecting direction through the spring-receiving engaging section for the dead bolt, in the case of at least a main locking. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a main locking device for a door, and more particularly to a main locking device for a door mainly including a biasing mechanism for a locking piece.
[0002]
[Prior art]
Generally, a deadbolt as a locking piece is provided in a lock box so as to be able to move forward and backward with reference to a front plate and via guide means. The dead bolt is pushed out of the front panel of the lock box by the drive arm (operating arm) of the dead cam, which is called "Dharma" in the art, in this locking. On the other hand, when the dead bolt is unlocked, the dead cam retreats into the lock box by rotating in the opposite direction. The dead cam rotates clockwise or counterclockwise by the driving force of the cylinder lock, or the thumb turn, or the drive motor, but the dead bolt is formed in the lock box when the dead cam rotates, whether manually or electrically. It reciprocates in the horizontal direction via a horizontal guide slot as a guide means and an engaging pin engaged with the horizontal guide slot. At this time, a coil spring is often provided in the lock box in order to stably or stably hold down the protruding or retracted deadbolt. The reason is to prevent the moved dead bolt from becoming in an unstable state (a rattling state).
[0003]
Therefore, conventionally, a spring receiving piece is provided in a protruding state in a lock box, and one end of the dead bolt coil spring is supported by the spring receiving piece. (A notch end face, a rear end part, etc.).
[0004]
By the way, the dead bolt is pushed out or pulled back by the dead cam as described above. Generally, the dead cam is provided at the tip of the drive arm (operating arm) at the inclined opposed notch end face formed at the rear end of the dead bolt. The portions are mounted for selective engagement.
[0005]
In consideration of the dead cam support position, how the urging mechanism (especially the urging spring) for the lock piece is arranged in the lock box depends on the length of the lock box case body in the width direction, dead time, and the like. This affects the thickness and length of the bolt and the presence or absence of a part that receives the end of the biasing spring.
[0006]
Therefore, considering the length of the lock box and dead bolt, the presence or absence of the spring end receiving piece, etc., how to rationally provide the urging spring for this locking piece, or what function the urging spring has Is one of the objects of the invention. Further, in the case of a door lock, it is expected that one or more locking effects can be obtained by using advance and retreat of a dead bolt.
[0007]
[Problems to be solved by the invention]
A first object of the present invention is to rationally provide an urging spring for the locking piece while taking into account the length of the lock case and dead bolt, the presence or absence of a spring end receiving piece, and the like. The distance to the center (so-called backset) can be shortened, the length of the deadbolt can be shortened, the thickness of the deadbolt can be reduced (with a sickle that follows the deadbolt) In such a case, no gap can be provided between the side surface of the scythe piece and the inner wall surface of the deadbolt). A second object is to make it possible to give a click feeling to the darma and eliminate an unstable state of the moved dead bolt by an urging spring provided on the dead bolt. A third object is that there is no need to project a spring end receiving piece for the biasing spring from the lock case. A fourth object is to obtain one or more locking effects (including locking on a latch) by using advance and retreat of a deadbolt.
[0008]
[Means for Solving the Problems]
In the present locking device for a door of the present invention, a dead bolt is provided on a lock case via a guide means so as to be freely movable, and selectively engages with front and rear notch engagement surfaces formed at the rear end of the dead bolt. When the darma is rotated clockwise or counterclockwise in the lock case of the door, the deadbolt moves forward and backward when the darma is rotated clockwise or counterclockwise. The dead bolt 5 is provided with one or two movable shafts 23 guided by the lock case 3, and one end 36 a of the movable shaft 23 is pressed against the spring receiving engagement portion 25 of the dead bolt 5, and An end portion 36b is provided with an urging spring 36 which presses against a spring receiving portion 34 provided in a stepped manner to the driving arm 33 of the dharma 31. The urging spring 36 is provided at least at the time of final locking. The tip of the It has a click localization function for vigorously pressing the front notch engaging surface 26 of the bolt 5 and a dead stabilizing function for pressing the dead bolt 5 in the protruding direction via the spring receiving engaging portion 25 of the dead bolt 5. It is characterized by.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 5 are explanatory views showing an embodiment of the present invention. First, an environment for implementing the present invention will be described with reference to FIG. Reference numeral 1 denotes a door that opens and closes in a horizontal direction. The door 1 is a gate made of, for example, an aluminum material, and the mounting end of the gate 1 is pivotally attached to a pillar provided between walls. Of course, the door 1 may be provided at the entrance of the frame (building), and is not limited to the gate. Reference numeral 2 denotes a push-pull lock as an example of a lock. The push-pull lock 2 is attached to an appropriate position on the open / close end of the door 1. The push-pull lock 2 is generally installed inside and outside the door 1, but this embodiment shows an example where it is installed inside the door 1.
[0010]
A lock case 3 has a push-pull type plate-like handle 4 attached to one side wall of the lock case 3. Reference numeral 5 denotes a dead bolt serving as a locking piece. The dead bolt 5 is engaged with or disengaged from a facing door 6 or a receiving member 7 provided on a frame. Reference numeral 8 denotes a thumb turn which is attached to the lock case 3 through the handle. The thumb turn 8 is linked to a dharma (dead cam) described later.
[0011]
Next, a main part of the present invention will be described with reference to FIGS. First, the lock case 3 will be described. The lock case 3 has a plate-shaped case body 10. A case lid (not shown) is opposed to the case body 10. Referring to FIG. 3, the case body 10 has a portion near the upper end portion bent in a step shape.
[0012]
Reference numeral 11 denotes a first horizontal guide slot formed in the horizontal direction near the bent portion 10a of the case body 10. The first horizontal guide slot 11 is formed from the center to the rear end of the case body 10. Reference numeral 12 denotes a projection shaft fixed to the upper end portion of the case body 10. The projection shaft 12 is provided at a position near the front 13 of the lock case 3.
[0013]
On the other hand, reference numeral 14 denotes a second horizontal guide slot formed in the vicinity of the bent portion 10a of the case body 10 in the horizontal direction. The lengths of the second horizontal guide slot 14 and the first horizontal guide slot 11 are substantially the same. The same is also true in that the two horizontal guide slots 11 and 14 are formed near the bent portion 10a of the case body 10. However, on the basis of the bent portion 10a, the difference lies in that the two horizontal guide slots 11 and 14 are provided above and below the case body 10 in an offset state from each other.
[0014]
Reference numeral 15 denotes a fitting shaft hole for the dharma formed in the center of the case body 10. At the left and right portions above the fitting shaft hole 15, small projection-like stoppers 16, 16 forming a pair at the front and rear are provided. Further, the case body 10 is provided with a shaft 17 for a latch stopper, a pair of upper and lower mounting holes 18 for a latch support frame, and the like.
[0015]
Next, the dead bolt 5 as the locking piece will be described. As is well known, the deadbolt 5 is provided in the lock case 3 with the front plate 13 as a reference, and is capable of moving forward and backward through guide means. The dead bolt 5 has two movable shafts 21 and 23 that respectively engage with the upper and lower horizontal guide slots 11 and 14 of the case body 10. That is, reference numeral 21 denotes a first movable shaft provided laterally in the upper shaft hole 22 of the rear end 5a, and reference numeral 23 denotes a second movable shaft provided laterally in the lower shaft hole 24 near the center.
[0016]
By the way, the tip portion 5b corresponding to the protruding side of the dead bolt 5 is formed in a convenient U-shaped end face obtained by bending a single plate. On the other hand, the rear end portion 5a is configured such that one plate (one side wall) is exposed.
[0017]
In other words, the opposing side wall on the front side of the rear end portion 5a is cut out in a step shape. The lower shaft hole 24 described above is formed in the step portion. In this embodiment, a spring receiving engaging portion (for example, a protruding piece) 25 is provided in an upper portion of one exposed side wall in a cross direction. The lower portion of one of the side walls is appropriately notched, and the front notch engaging surface 26 and the rear notch engaging surface 27 for darma formed by the notch are inclined.
[0018]
Next, a darma (dead cam) for pushing out or pulling back the dead bolt 5 will be described. The dharma 31 that rotates by an operation such as a thumb turn is rotatably fitted into the fitting shaft hole 15 of the case body 10.
[0019]
Thus, the dharma 31 extends from the central portion 32 in an arm shape to the cylindrical central portion 32 supported by the case body 10, and engages with the front notch engaging surface 26 of the deadbolt 5 and the rear notch engagement. The drive arm 33 includes a drive arm 33 selectively pressed against the surface 27, and a mountain-shaped spring receiving portion 34 connected to the side wall of the drive arm 33 in a stepped manner. The drive arm 33 swings between the stoppers 16, 16 before and after the dead bolt 5.
[0020]
Next, the biasing spring 36 will be described. The annular central portion of the biasing spring 36 is mounted around the central portion of the dead bolt 5 while being wound around the second movable shaft 23. The one end 36a is constantly pressed against the spring receiving projection 25 of the dead bolt 5, while the other end 36b is constantly pressed against the spring receiving portion 34 of the dharma 31.
[0021]
Since the urging spring 36 is mounted on the dead bolt 5 so as to move horizontally with the dead bolt 5, the other end 36b of the urging spring 36 rides on the spring receiving portion 34 of the dharma 31.
[0022]
Here, two functions of the biasing spring 36 will be described with reference to FIGS. FIG. 2 shows a state in which the dead bolt 5 projects from the lock case 3 when the dharma 31 rotates counterclockwise and the lock is completed. On the other hand, FIG. 4 shows the unlocked state in which the dead bolt 5 is retracted into the lock case 3 by the clockwise rotation of the dharma 31. At the time of the main locking and unlocking, the other end portion 36b of the biasing spring 36 is always in pressure contact with the spring receiving portion 34 of the dharma 31.
[0023]
In other words, whether the locking operation is performed or the unlocking operation is performed, the dharma 31 rotates left and right so that the driving arm 33 passes on the vertical line O (the center of the dharma fitting shaft hole) at the center of the dharma 31. Then, the other end 36 b of the biasing spring 36 urges the distal end of the drive arm 33 of the darma 31 against the front notch engaging surface 26 or the rear notch engaging surface 27 of the deadbolt 5 with vigor. The spring action of pressing the urging spring 36 with great force can be said to be a click localization function of localizing the so-called dharma 31 in a click manner.
[0024]
On the other hand, at the time of the main locking, the one end 36a of the biasing spring 36 has the other end 36b riding on the spring receiving portion 34 of the dharma 31 in a press-contact state. It is pressed in the protruding direction via the wire 25. This spring action of pressing the dead bolt 5 in the protruding direction can be said to be a dead stabilizing function for stabilizing the dead bolt 5 so as not to rattle.
[0025]
As described above, the biasing spring 36 has the above-described two functions (the click localization function at the time of locking / unlocking and the dead stabilizing function after the actual locking). There is a function to push out 5. That is, FIG. 5 is a schematic explanatory view showing an intermediate stage from the time of unlocking to the time of locking. In this case, when the dharma 31 starts to rotate counterclockwise, the other end 36b of the biasing spring 36 becomes undamaged. 31 is lifted by the drive arm 33.
[0026]
Thus, as the drive arm 33 of the darma 31 rises (meaning that it is in the vertical state), the spring force of the biasing spring 36 in the outward expanding direction is increased by the one end 36a of the biasing spring 36 and the spring receiving engagement portion. It acts in the direction in which the dead bolt 5 protrudes (extends) through 25. Therefore, the dead bolt 5 moves horizontally in the direction of the arrow X via the guide means 11, 14, 21, 23 before the drive arm 33 of the darma 31 hits the front notch engaging surface 26 of the dead bolt 5.
[0027]
Next, the sickle piece 40 will be described. In this embodiment, a sickle piece 40 is combined with the dead bolt 5 as the locking piece so as to follow the dead bolt. More specifically, the scythe piece 40 has a rear end portion 40 a pivotally supported by the protruding shaft 12 of the case body 10, and has an engagement pin 41 and a scythe piece 40 laterally provided at a position near the tip of the dead bolt 5. Are combined so as to interlock with the dead bolt 5 through a long hole 42 formed in the center portion of the. The central portion 40b having the long hole 42 of the sickle piece 40 is substantially accommodated in the cavity at the U-shaped tip of the dead bolt 5.
[0028]
Therefore, when the dead bolt 5 protrudes (extends) with respect to the front 13, the sickle piece 40 rotates about the projection shaft 12 as a fulcrum and simultaneously engages with the dead bolt 5 in the receiving member 7. On the other hand, when the deadbolt 5 retreats into the lock case 3, the sickle piece 40 is drawn back in the direction of disengagement via the engagement pin 41. As described above, the dead bolt 5 and the sickle piece 40 operate substantially simultaneously by the linking means constituted by the engaging pin 41 of the dead bolt 5 and the long hole 42 of the sickle piece 40.
[0029]
Next, components related to the present invention will be briefly described. 50 is a reversing type latch provided below the dead bolt 5, 51 is a latch support frame having a U-shaped cross section fixedly provided on the lock case, 52 is a latch spring provided in the latch support frame, and 53 is a latch spring. A latch stopper 54 supported between the dead bolt 5 and the latch support frame 51 via the shaft 17 is a spring that constantly biases the latch stopper 53 in a direction to engage the rear end of the latch 50.
[0030]
The latch stopper 53 includes an annular portion pivotally supported by the lock case 3 and a contact portion 55 provided below the annular portion and capable of contacting the horizontal upper plate of the latch support frame 51. A projecting stopper portion 56 extending downward from the contact portion 55 and penetrating through the latch support frame and engaging with and disengaging from the engagement receiving portion 50a above the rear end portion of the latch 50; It comprises a finger-like receiving portion 57 which extends in the opposite direction to the stopper portion 56 and is pushed by the dead engaging portion (notched end surface) 28 below the dead bolt 5 when the dead bolt 5 is retracted.
[0031]
Therefore, as shown in FIG. 4, when the dead bolt 31 is rotated clockwise (in the direction of the arrow) and the dead bolt 5 is retracted into the lock case 3 when the dead bolt is unlocked, the latch stopper 53 is moved to the dead engagement portion 28. , And rotates in the unlocking direction against the spring force of the latch stopper spring 54.
[0032]
On the other hand, as shown in FIG. 2, when the dead bolt 31 is rotated counterclockwise and the dead bolt 5 projects from the lock case 3 when the dead bolt is locked, the latch stopper 53 is moved in the locking direction by the spring force of the spring 54. To engage with one of the engagement receiving portions 5a of the latch 50. Therefore, movement (for example, prevention of reversal) of the latch 50 is prevented. Thereby, at the time of the main locking, one or more locking effects can be obtained by utilizing the advance / retreat of the dead bolt.
[0033]
【Example】
In the embodiment, the spring receiving engagement portion 25 is provided in the form of a protruding piece on the dead bolt 5, but the spring receiving engagement portion 25 may be an engagement groove. In general, the relationship between the engaging portion (convex) and the engaged portion (concave) of the lock can be arbitrarily changed by those skilled in the art, so long as the operation and effect are the same, the relationship is within the range of the invention. included.
[0034]
【The invention's effect】
As is clear from the above description, the present invention has the following operations and effects.
(1) The urging spring provided on the dead bolt can give a click feeling to the darma and can eliminate the unstable state of the moved dead bolt.
(2) Since the urging spring having two functions is provided on the movable shaft of the dead bolt guided by the lock case, the distance from the front surface of the front plate to the center of the dharma (so-called back set) can be reduced. it can. Further, the length of the dead bolt can be shortened. In other words, the space inside the lock box can be effectively used, so that the size of the lock case can be reduced.
(3) There is no need to protrude the spring end receiving piece for the biasing spring from the lock case.
(4) One or more locking effects (including locking on the latch) can be obtained by utilizing the advance / retreat of the dead bolt. Therefore, it is possible to more reliably prevent unauthorized unlocking.
[Brief description of the drawings]
1 to 5 are schematic explanatory views showing one embodiment of the present invention.
FIG. 1 is a schematic explanatory view of an implementation environment of the present invention viewed from a plane.
FIG. 2 is a schematic explanatory view at the time of main locking.
FIG. 3 is an exploded perspective view of a main part.
FIG. 4 is a schematic explanatory view at the time of unlocking.
FIG. 5 is a schematic diagram illustrating a spring action of a main part (biasing spring).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Door, 2 ... Lock, 3 ... Lock case, 4 ... Handle, 5 ... Deadbolt, 6 ... Door (body), 7 ... Receiving tool, 8 ... Thumb turn, 10 ... Case body, 11 ... First horizontal guide length Holes, 12: Projection shaft, 13: Front, 14: Second horizontal guide elongated hole, 15: Fitting shaft hole for Dharma, 16: Stopper, 17: Shaft, 21, 23: Movable shaft, 22: Upper shaft hole, Reference numeral 24: lower shaft hole, 25: spring receiving engaging portion, 26: front notch engaging surface, 27: rear notching engaging surface, 28: engaging portion, 31: daruma, 32: cylindrical central portion, 33 ... Drive arm, 34: spring receiving portion, 36: biasing spring, 36a: one end, 36b: other end, 40: sickle, 41: engagement pin, 42: long hole, 50: latch, 51: latch support Frame, 52: latch spring, 53: latch stopper, 54: spring, 55: contact portion, 56: stopper portion, 57: receiving portion .

Claims (3)

A dead bolt is provided on the lock case via guide means so as to be freely movable, while a dharma having a drive arm selectively engaging with front and rear notch engagement surfaces formed at the rear end of the dead bolt is provided on the lock case. When the darma is rotated clockwise or counterclockwise, the dead bolt advances and retreats due to the pressing of the drive arm against the notch engaging surface. The movable shaft 23 is provided with one or two movable shafts 23. One end 36a of the movable shaft 23 is pressed against the spring receiving engagement portion 25 of the dead bolt 5, and the other end 36b is a drive arm of the dharma 31. A biasing spring 36 which is pressed against a spring receiving portion 34 provided in a step-like manner at the step 33 is attached to the front end of the dead bolt 5 at least at the time of full locking. Engagement surface 6. The door locking device characterized in that it has a click localization function for vigorously pressing the door 6 and a dead stabilizing function for pressing the dead bolt 5 in the projecting direction via the spring receiving engagement portion 25 of the dead bolt 5. apparatus. 2. A sickle piece (40) according to claim 1, wherein a rear end (40a) of the sickle piece (40) is pivotally supported by the protruding shaft (12) of the lock case, and an engagement pin (41) and a sickle provided laterally at a position near the tip of the dead bolt (5). A final locking device for a door, which is combined with a dead bolt 5 through an elongated hole 42 formed in a central portion of a piece 40. According to claim 1, a latch support frame 51 is fixed to the lock case 3, and the latch support frame 51 and the dead bolt 5 are interposed via the shaft 17 and when the dead bolt 5 moves forward and backward. A latch stopper 53 that rotates by engaging with the dead bolt is supported by a shaft. A spring 54 that constantly biases the latch stopper 53 in a direction in which the latch stopper 53 engages with the rear end of the latch 50 in the latch support frame. The present locking device for a door, comprising:

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