JP2512184Y2 - Door lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a lock for a door, more specifically, a lock for an entrance door of a general household or an entrance / exit door of an office.

(Prior Art) A conventional general door for entrance and exit is hinged to a fixed frame (or pillar) of a building at one end side as is well known, and at the other end side from the outside by a cylinder lock, In addition, a lock box that is locked and unlocked by thumb turn is installed from the inside. Inside the lock box, the dead bolts and latches are inserted into the slot provided in the fixed frame facing the side end surface of the door from the outside as described above, and the dead bolts and latches are retracted from the inside by thumb-turns. ,
It is built so that it can be unlocked.

(Problems to be solved by the invention) However, the door lock that has been generally used conventionally is fixed with a dead bolt and a latch and a groove hole into which the dead bolt and the latch are fitted in a locked state. There is a gap between the frame (or pillar). Therefore, in the locked state, when the knob or handle is pushed and pulled from the outside, or when the door is pushed and pulled by the influence of strong wind, the door vibrates rattlingly.

Such an inconvenience is caused, for example, by using an L-shaped lock body instead of the dead bolt as shown in Japanese Utility Model Publication No. 57-32218, the lock body being rotatable and fixed, and the lock body being inwardly locked. It can be improved by configuring to be attracted to. However, when such a door lock is used, the size of the gap between the side surface on the other end side of the door and the inner surface of the fixed frame poses a problem, and there is a limit to how much the door can be pulled by the lock body, and the door should be pulled in a tight contact state. Was difficult.

The present invention solves the problems of the door lock having the L-shaped or sickle-shaped lock body described above, and provides a door lock having a door locking function by a latch.

(Means for Solving the Problems) A door lock according to the present invention is a door-contact surface plate in which the inner surface at the other end of the door hinged to a fixed frame (or a pillar) at one end is the front surface at the other end of the fixed frame. And a door lock in which the door is coupled and locked to the door-contact surface plate portion at the overlap portion, and inside the lock box, that is, in the slot of the door-contact surface plate portion. A lock that turns around and appears,
A cylinder is provided with a latch rod having an upper end latch which extends through the inside of the door and extends upward to fit into and disengage from the hole of the fitting portion of the fixed frame (or column), and from which the key is inserted and rotated to rotate. By rotating the lock or by rotating the thumb turn from the inside, the sickle-shaped lock body rotates and is retracted. When locking, it enters the slot of the door contact surface plate surface portion, After the lock body engaged with the door-contact surface plate portion is slightly retracted to the lock box side after the engagement, the door is pulled toward the door-contact surface plate portion side, and in this locked state, the lowering of the latch rod is prevented. It is configured as follows.

The rotating portion of the lock body has parallel side plates provided with L-shaped grooves at opposing positions in a direction perpendicular to the front and back surfaces of the door,
A floating pin is fitted in the L-shaped groove, and a vertical movement is possible between a guide case in which a fixing pin is provided inside the floating pin and a side plate of the guide case. And a lock body supported by a floating pin and a fixing pin of the guide case is rotated and moved up and down by the vertical movement of the slider. The latch rod is controlled by advancing / retreating a laterally movable body capable of reciprocating in the horizontal direction, and the slider and the laterally movable body are operated by the cam lever described above.

(Operation) For example, when the key is inserted into the cylinder lock to lock it from the outside of the door and the key is rotated clockwise, the operating piece at the tip of the cylinder lock engages with the hole of the cam lever.
The cam lever is rotated, the slider is moved upward by one lever portion of the cam lever, and the lock body is pivotally advanced into the groove hole of the door-contact surface plate portion and engaged with the door-contact surface plate portion. After that, the door is slightly retracted and the door is pulled toward the door-contact surface plate portion. At the same time, by the other lever portion of the cam lever, the lateral moving body advances toward the latch rod and engages with the latch rod, thereby making it impossible to lower the latch rod.

On the contrary, when the key is rotated counterclockwise to unlock, the cam lever is rotated in the opposite direction to the above direction, and the lock body is moved forward once and then rotated to move from the slot of the door-contact surface plate. It comes off and becomes unlocked. At the same time, the lateral moving body is retracted and separated from the latch rod, and the lowering operation of the latch rod becomes possible by operating the handle.

(Embodiment) Referring to the drawings showing an embodiment of the present invention, the present invention is, for example, as shown in FIG. 6, one end side of a fixed frame, a fixed column, etc. (hereinafter referred to as a fixed frame) 1. The inner surface on the other end side of the door 3 hingedly connected to the above is superposed on the door contact surface plate portion 4 on the front surface on the other end side of the fixed frame 1, and at the superposed portion, both The door lock surface of the fixed frame 1 is provided with a slot 5 into which a sickle-shaped lock 25 described later engages, and the upper frame portion of the fixed frame 1 is It extends through the door from the door lock upwards,
A fitting portion 6 is provided to engage and disengage the upper end latch 11 of the latch rod that is retracted by the handle 10.

As shown in FIGS. 1 to 6, the door lock according to the present invention has a key hole 14 for rotating the cylinder lock 13 and a handle 10 for retracting the upper end latch 11 on the outside of the lock box 12. The inside is provided with a handle 10 'fixed to a shaft 17 for retracting and retracting the thumb turn 16 and the upper end latch 11. Lock box 12
A guide case 19 provided with two side plates 18 and 18 extending vertically with respect to the inner and outer surfaces of the door 3 is fixed therein to form a vertical guide space. , 1
8 are provided with L-shaped grooves 20 and 20 at the same position,
A floating pin 21 is fitted in the L-shaped groove 20,20, and a fixing pin 22 supported by the both side plates 18,18 is provided inside the L-shaped groove 20,20.

8 and 9 show the guide case 19.

Then, a sickle-shaped lock body 25 having two elongated holes 23, 24 on the base side is provided in the guide case 19 by fitting the floating pin 21 and the fixing pin 22 into the elongated holes 23, 24. It is swingably supported. Further, in the guide space of the guide case 19, there is provided a vertical recess 26 for avoiding contact with the fixed pin 22 when moving in the vertical direction and a slidable groove 27 that engages with the floating pin 21 and extends obliquely upward. The moving body 28 is mounted so as to be movable up and down, and when the sliding body 28 is moved downward, the lock body 25 rotates upward with the fixing pin 22 as a fulcrum from the opening 29 provided inside the lock box 12. When the sliding member 28 is moved upward, the leading end portion of the lock body 25 projects into the groove 5 of the door contact surface plate portion 4 by projecting the leading end portion thereof inside the door 3.
It is adapted to be housed in the guide case 19 while being separated from and rotating. 10 to 12 show the sliding body 28.

On the other hand, as shown in FIG. 1, an L-shaped cam lever 30 is swingably supported in the lock box 12, and one lever portion 31 thereof is guided by a long hole 32 of the lock box 12. The base 33 is vertically movable and is engaged with the opening 35 of the slider 34 coupled to the sliding body 28, and the other lever 36 is fitted in the lower small diameter portion 38 of the latch rod 37 so that it can be inserted and removed laterally. When the cam lever 30 is rotated in the clockwise direction in FIG. 1 by the operation piece at the tip of the cylinder lock that is connected to the moving body 39 and engages with the hole 15 of the cam lever 30 or the tip shaft portion of the thumb turn 16, the slider is moved. 34 is moved upward, and at the same time, the lateral moving body 39 is detached from the small diameter portion 38 of the latch rod 37. 40 is a connecting pin between the lateral moving body 39 and the other lever portion 36 of the cam lever 30, and 41 is a lateral moving body.
Guide grooves 39 and 42 are guide pins fixed to the lateral moving body 39 and fitted in the guide grooves 41.

On the other hand, handles 10 and 1 provided outside and inside the door 3
An inverted L-shaped hub 43 is fixed to the shaft 17 of 0 ', and the hub 43
One end portion 44 of the latch rod 37 is positioned in the lock box 12 and is elastically biased upward by a spring 45, and is positioned by a stopper 47 on a lower flange 46 of a small diameter portion 38 of the latch rod 37. The other end 48 of the hub 43 is elastically urged counterclockwise by a coil spring 49, and when the unlocked state, the outer or inner handle 10 or 10 'is operated to move the hub 43 into two springs 45, 49. When it is rotated clockwise against the elasticity, the latch rod 37 moves downward,
11 disengages from the hole of the fitting portion 6 of the fixed frame 1 and the handle
When 10 or 10 'is released, the latch rod 37 is moved upward by the elastic force of both springs 45, 49, and the upper end latch 11 is restored to the position elastically protruding from the upper edge of the door 3.

Next, the locking and unlocking operations will be described with reference to FIGS. 1 to 5. In the unlocked state shown in FIGS. 5 and 2, the key insertion rotation operation from the outside, or When the cam lever 30 is turned counterclockwise in FIG. 5 by the turning operation of the thumb turn 16 from the inside,
Both the slider 34 and the sliding body 28 are moved downward by the cam lever 30, and at the same time, the lateral moving body 39 is moved to the right side to move the lateral moving body 39.
The U-shaped groove (not shown) in the front part of the
And the latch rod 37 cannot be lowered. Slider
When the slider 34 and the sliding body 28 are moved downward, the floating pin 21 is moved downward by the spring 50 provided in the lock body 25, and the lock body 25 moves from the opening 29 with the fixing pin 22 as a fulcrum to the other end of the fixed frame 1. As shown in FIG. 3, the U-shaped concave portion 51 of the lock body 25 is located above the slot 5 of the door-contacting surface plate portion 4 while rotating and projecting toward the door-contacting surface plate portion 4 on the side front surface. Fit on the edge. When the sliding body 28 is further moved downward from this state, the inclined pin 27 of the sliding body 28 causes the floating pin 21 located at the bottom of the L-shaped groove 20.
Is laterally moved to the right side, whereby the lock body 25 is pulled toward the lock box 12 side as shown in FIG. 4, and the inside of the lock box 12, that is, the inner surface of the door and the door-contact surface plate portion 4 are The door 3 is tightly adhered, the rattling of the door 3 at the time of locking is eliminated, and the door is completely locked. FIG. 1 shows the inside of the lock box 12 in this locked state.

When the cam lever 30 is rotated clockwise in FIG. 1 by operating the key or thumb turn 16 from the locked state shown in FIGS. 1 and 4, the slider 34 and the sliding body 28 are moved by the cam lever 30. Moved up. When the sliding body 28 is moved upward, first, the floating pin 21 is pushed to the left by the action of the inclined surface of the inclined groove 27 so that the tip end of the lock body 25 is projected from the lock box 12, as shown in FIG. The pulling force is released. Subsequently, the sliding pin 28 is moved upward to move the floating pin 21 upward along the L-shaped groove 20, and the tip of the lock body 25 is rotated downward (unlocking direction) with the fixing pin 22 as a fulcrum. It is moved and stored in the lock box 12 as shown in FIG.

On the other hand, when the cam lever 30 is unlocked as described above, the other lever portion 31 of the cam lever 30 causes the lateral moving body 39 to laterally move from the state shown in FIG. 1 to the left side as shown in FIG. Then, the latch rod 37 can be lowered. Therefore, when the hub 43 is rotated clockwise by operating the handle 10 or 10 'from the outside or inside, the latch rod 37
Is lowered, the upper end latch 11 can be detached from the hole of the fitting portion 6 of the fixed frame 1 to open the door 3, and when closed, the latch rod 37 is operated by the inclined surface of the upper end latch 11 as usual. Is pushed down against the elastic force of the spring 45, and when the door 3 is closed, the latch rod 37 is restored upward by the elastic force of the spring 45, and the upper end latch 11 projects into the hole of the fitting portion 6 of the fixed frame 1 and the door is closed. Hold 3 closed.

(Effect of the device) Since the door lock of the present invention has the above-mentioned structure, the lock lever can be unlocked in the same manner as in the past by rotating the cam lever 30 forward and backward by operating the key from the outside and operating the thumb turn from the inside. Not only can it be locked, but it is locked to the fixed frame 1 side on the inner surface side of the door 3, and in the completely locked state, the door 3 is pulled toward the door contact surface plate 4 side of the fixed frame 1. The inner surface of the door 3 and the front surface of the fixed frame 1 are surface-joined to each other, and there is no rattling of the door, and no vibration noise is generated from the door 3 after locking. In addition, at the time of locking, the latch rod 37 is prevented from descending, and the upper edge of the door 3 is also locked, so that the locking is strong and the latching function is exerted in the unlocked state.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view, FIG. 2, FIG. 3, FIG. 4 and FIG. FIG. 6 is a side sectional view of the inside of the lock body showing the movement of the lock body from the locked state to the completely locked state, FIG. 6 is an overall perspective view of the door and the fixing frame, FIG. 7 is a side view of the door, FIG. FIG. 9 is a front view and a longitudinal sectional side view of the guide case, and FIGS. 10, 11 and
FIG. 12 is a plan view, a vertical sectional side view and a front view of the sliding body. 1 ... Fixed frame, 2 ... Hinge coupling, 3 ... Door, 4 ... Fixed frame door contact surface plate part, 10, 10 '... Handle, 11
…… Top latch, 12 …… Lock box, 15 …… Hole, 16 …… Thumb turn, 17 …… Handle shaft, 18 …… Side plate, 19 …… Guide case, 20 …… L-shaped groove, 21 …… Floating pin, 22 …… Fixing pin, 23,24 …… Long hole, 25 …… Lock body, 27 …… Inclined groove, 28
…… Sliding body, 30 …… Cam lever, 37 …… Latch rod,
39 …… Transverse body, 43 …… Hub.

Claims (1)

(57) [Scope of utility model registration request] 1. A door, which is hinged to a fixed frame at one end side, has an inner surface on the other end side overlapped with a door-contact surface plate portion on the front surface on the other end side of the fixed frame, and at the overlapping portion, the door is The door lock is coupled and locked to the door-stop surface plate portion, and the L-shaped cam lever rotatable from the outside by a key and from the inside by a thumb turn is connected to one side portion of the lock box from the inside surface to the door-contact surface plate portion. One of the lock boxes in which the lock body is located is provided with a sickle-shaped lock body that pivots in and out, and a latch rod that penetrates through the door and extends upward on the other side and has an upper end latch at the top. A guide case having parallel side plates perpendicular to the front and back surfaces of the door is fixed to the side portion, and a vertical guide space is formed by the guide case, and an L-shaped groove is provided in the parallel side plate. A floating pin is fitted in the L-shaped groove, and the parallel side plate is inside the floating pin. Therefore, the lock pin provided with the fixed pin supported therein and having two elongated holes in a V shape on the base side is swingably supported by fitting the floating pin and the fixed pin into the two elongated holes. A slide body having an inclined groove that extends obliquely upward by engaging with the floating pin is mounted in the guide space of the guide case so as to be vertically movable, and the other side portion of the lock box in which the latch rod is located, A lateral moving body that is fitted into and removed from the lower portion of the latch rod and prevents the latch rod from descending when fitted is provided. One lever portion of the L-shaped cam lever is a slider and the other lever portion is a lateral moving body. A handle provided on the inner and outer surfaces of the lock box, the slider being moved in the vertical direction and the lateral moving member being moved in the horizontal direction by rotating the cam lever to the right or left. A hub is provided on the shaft of the Tobirajo, characterized in that it is configured so that the latch rod is lowered by the operation of Le