JPH0532601Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device, and more particularly to a locking device that uses a curved lockbark to lock into a lock hole of an L-shaped lock frame, thereby preventing the lock from being destroyed by violence.

In all commonly known locks, the engagement between the lock and the bar frame on the door frame is direct-in and direct-out. In other words, the lock enters the U-shaped bar frame in a straight line along the horizontal direction, thereby locking the door.When opening the door, the lock also moves directly out of the bar frame. I try to let them do it.

Such an engagement method is easily destroyed by violence by a thief or the like, and as a result of the destruction, there is a problem in that the locking effectiveness is lost. The reason for this is that with ordinary single-stage locks, the depth that the lock enters into the lock frame is very short, so a thief can simply impact the door with force, causing the door and lock to curve and locking. It is possible to enter by moving the bolt out of the bolt frame and breaking the door (this kind of break-in situation is often seen in TV movies). In addition, in commonly known two-stage or three-stage locks, the depth at which the lock enters the bar frame is slightly deeper than in single-stage locks, but the depth is determined by the thickness of the door frame. It is also very limited due to the limitations of At this time, the thief's intrusion method is to first extend a pry bar between the door and the door frame, pry the door a certain distance away from the door frame (when joining the door to the door frame, the door can be opened and closed freely). A gap or tolerance is always left between the door and the door frame to ensure safety, so the door can be pried open by this method).
That is, after the lock has been moved out a short distance, the door is impacted even more forcefully, thereby allowing the lock to completely move out of the lock frame, allowing entry by breaking the door.

Overall, in commonly known locks, whether electronic or mechanical, the lock enters directly into the lock frame, so a thief or the like would first need to pry the lock open with a pry bar. Afterwards, he pushes the door open even more forcefully, and ends up losing the purpose of locking it.

In view of the fact that the well-known lock described above has the drawback of being easily destroyed by violence, the inventor of this invention has repeatedly devised ways to improve and innovate, and has spent several years of painstaking research and public consideration. Finally, they succeeded in designing a locking device with such a curved lock.
This firstly prevents the lock from being pried open,
This makes it possible to prevent the door from being forced open and ensure the key locking effect of the lock.

In order to achieve such an object, the present invention provides a locking device that is provided between a door frame and a door and locks the space between them as necessary, which includes a fixing plate that is attached along the surface of the door, and A plurality of curved holes provided in the fixed plate, having a horizontal portion and a vertical portion smoothly connected to the horizontal portion on the front end side of the door, forming an L-shape as a whole, and provided parallel to each other; A protruding portion is supported by the fixing plate by a support shaft slidably inserted into each of these curved holes, and is inserted into a lock hole in a bar frame provided in the door frame parallel to the vertical portion. It consists of a lock provided at the tip parallel to the vertical part, and a link mechanism that converts rotation of a shaft operated by a key into movement of the lock along the curved hole.

According to the above configuration, by rotating the shaft with the key, the lock slides along the curved hole, moves in the horizontal direction and enters the lock frame on the door frame, and further changes the direction. They can each be inserted into locking holes in the bar frame along the vertical direction.

The many excellent effects of the present invention are also apparent from the examples described below.

As shown in FIG. 1, one arm transmission device 20-28 is provided in the fixed plate 10 of the improved locking device according to the present invention. L-shaped locks 30 and 40 are also provided on the upper and lower sides of the transmission. The arm segment transmission device 20
- 28 are one swing arm 20, arm joint connecting rods 27 and 28 respectively connected to the locking bolt 30 or 40 via a shaft, the swing arm 20 and the two arm joint connecting rods 27, and a connecting rod 24 that connects the connecting rod 28 with the connecting rod 28 .

The fixing plate 10 has one linear elongated hole 11,
Bent holes 1 provided above and below respectively
2, 13, 14, and 15 are provided so as to pass through each of them. A support shaft 2 is provided at both ends of the connecting rod 24.
5 and 26 are connected, and these support shafts 25 and 26 pass through the elongated hole 11 and connect to the connecting rod 2.
4 is moved along the elongated hole 11.
A pair of support shafts 31, 32 and 41, 42 are connected to the inner ends of the locks 30 and 40, respectively.
Each of the support shafts 31, 32 and 41, 42 passes through each of the bent holes 12, 13 and 14, 15, respectively. Such a mechanism allows the two locks 30 and 40 to slide along each pair of bent holes 12, 13 and 14, 15, respectively. That is, the upper lock 30 first slides outward (to the left in FIG. 1) along the horizontal direction, then further changes direction, and then slides vertically upward. On the other hand, the lower lock 40 first slides outward along the horizontal direction (to the left in FIG. 1), then further changes direction, and then slides vertically downward.

The swing arm 20, which is a part of the arm transmission devices 20 to 28, is a driving element that interlocks the connecting rod 24 and the two arm connecting rods 27 and 28,
One shaft 21 is attached to the top end of the swing arm 20.
The shaft 21 can be connected to a known lock (not shown). and,
By inserting a key into the lock, the shaft 21 can be turned and the swing arm 20 can be slid from side to side. A long hole 22 is formed at the bottom end of the swing arm 20, and the tip thereof is open. A support shaft 25 at the inner end of the connecting rod 24 is inserted into the elongated hole 22 .

Therefore, by rotating the shaft 21,
The swing arm 20 moves linearly, and the connecting rod 2
4 and both arm joint connecting rods 27 and 28, the upper and lower locks 30 and 40 are individually connected to each pair of bent holes 1.
2, 13 and 14, 15.

FIG. 1 shows the unlocked state. When the shaft 21 is rotated clockwise from this state, both locks 30,
40 first slides horizontally, then changes direction and slides vertically, where both L-shaped locks 3
Bar frame 5 corresponding to 0 and 40 in an L shape above and below, respectively
0, and the protruding ends of the locking bolts 30 and 40 are all fitted into the upper and lower locking holes 51 and 52 of the locking frame 50, respectively. By doing this, when a thief inserts a pry bar between the door frame 80 and the door 70 and forcefully pries it, the protruding ends of the locks 30 and 40 and the upper and lower lock holes 5 will be removed.
Mutual resistance of the contact surfaces (a and b in FIG. 2) between the hole walls of holes 1 and 52, and the support shafts 31, 32, 4
Since locks 1 and 42 are designed to receive resistance from the inner walls of the holes 12, 13, 14, and 15, a thief will not be able to pry open the door in the slightest. It is designed to be deep enough to fit inside the bar frame 50, so that it does not become shallow due to being forcibly moved, and can sufficiently withstand the strong impact of a thief.

In Figure 2, the two corresponding locks 3 above and below
0 and 40 were installed to avoid situations in which a thief could lift or push down the door and then take advantage of the opening. Naturally,
Alternative embodiments in which the improved lock is provided with only a single lock bar 30 or 40 are also acceptable.

In the illustrated embodiment, the thief inserts a pry bar or other tool between the door 70 and the door frame 80 and then forces the lock 30 downwards or lifts the lock 40 upwards to remove the lock. In order to avoid the phenomenon of sliding the bolts 30 and 40 in opposite directions and withdrawing the bar frame 50, the support shaft 2 in FIG.
One circular arc hole 16 is provided above 5.
In this way, when a thief pushes up the lock 30 downward or lifts the lock 40 upward, the acting force is transmitted through the transmission of the arm connecting rod 27 or 28 and the elongated hole 1.
Due to the obstruction of the inner wall of hole 1 (point c in Fig. 2), a horizontal component force is applied to the right side through the connecting rod 24 (the horizontal component force is already greater than the original acting force due to arm joint transmission). ), and connecting rod 2
The right end support shaft 25 of 4 is the elongated hole 2 of the swing arm 20.
Since the swing arm 20 is obstructed by the inner wall of the hole No. 2 (point d in FIG. 2), the swing arm 20 becomes immobile at this time. Therefore, the support shaft 25 is simply slid into the arcuate hole 16 along the direction of the elongated hole 22. The circular arc hole 16 is opened in a circular arc line with the support shaft 26 as the center and the connecting axis of both support shafts 25 and 26 as a radius. 16, its left end support shaft 26 does not move. As a result, when a thief pulls down the lock 40 upwards or presses the lock downwards, he is unable to move the locks 30, 40 together at all.

In the present invention, a protruding post 60 is also installed above the swing arm 20, which receives the pressure of another spring 61, and the top edge of the swing arm 20 is also provided with several teeth 23 that engage with the protruding post 60. By installing the convex pillar 60 into the tooth 23,
When the operator rotates the swing arm 20, two patterns can be sensed in which the locks 30, 40 can extend into the lock frame 50 and fit into the lock holes 51, 52.

To summarize the above, the present invention utilizes the arm transmission devices 20 to 28 to lock the L-shaped locks 30 and 40 in a bent manner to lock the lock holes 51 and 52 of the L-shaped lock frame 50.
Since the lock is inserted inside, the thief is sure to get the lock 30,
This lock has the advantage of not being able to open the lock by force or force, and has a better crime prevention effect than generally known locks.

We have made many more modifications to the specific embodiments of the invention shown in the figures and described above.
Modifications and/or additions may be made, but such modifications do not depart from the spirit and scope of the present invention, and therefore the scope of the patent for the present invention shall not be limited by the scope of the utility model claims. Just receive it.

As is clear from the above description, the present invention provides linear movement of the lock into the locking hole of the bar frame by moving the lock along the horizontal and vertical portions of the L-shaped curved hole. Therefore, even if there is only a small amount of play between the lock hole and the lock, the lock can operate smoothly, so it cannot be forced open by force applied to the lock. It is difficult to do so, and it is possible to obtain an extremely high crime prevention effect.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view of the unlocked state, and FIG. 2 is a plan view of the locked state in which the locks 30 and 40 extend into the lock frame 50.

Claims (1)

[Claims for Utility Model Registration] 1. A locking device that is provided between a door frame and a door and locks the space between them as necessary, comprising: a fixing plate attached along the surface of the door; and this fixing plate. It has a horizontal part and a vertical part that smoothly connects to the horizontal part on the tip side of the door, forming an L-shape as a whole, and
A bolt is supported on the fixed plate by a plurality of bent holes provided parallel to each other and a support shaft slidably inserted into each of these bent holes, and is provided in the door frame parallel to the vertical portion. a lock having a protrusion inserted into a lock hole in the frame and provided at the tip parallel to the vertical portion; and converting rotation of a shaft operated by a key into movement of the lock along the curved hole. A locking device comprising: a link mechanism; 2. A utility model according to claim 1, characterized in that a pair of the plurality of curved holes and locks supported through pivots are provided with the vertical portions facing in opposite directions. locking device. 3. The link mechanism is rotatably connected to a connecting rod that is slidably supported in an elongated hole provided parallel to the horizontal part of the bent hole, and to the tip of the connecting rod and the lock. A claim for registration of a utility model characterized in that the invention comprises an arm-joint connecting rod, and a swing arm that rotates by a shaft operated by the key and whose tip is rotatably connected to the other end of the connecting rod. The locking device according to item 1 or 2 of the range.