JPH0453420Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a locking device called a crescent lock (trade name) that is particularly applied to sliding doors.

<Prior art> Conventionally, locking devices for sliding doors have been equipped with a fixed hook on one sliding door and a movable hook that engages and disconnects from the fixed hook on the corresponding other sliding door.
By stopping the sliding door in the closed position and rotating the movable hook forward and backward, both hooks are engaged and unlocked to lock and unlock the door.

<Problems to be solved by the invention> In the above-mentioned conventional locking device, as a lock mechanism for regulating the rotation of the movable hook, a protrusion that rotates together with the hook is usually provided on the rotating shaft of the movable hook. On the other hand, a sliding stopper is provided on the mounting base, and the movable hook is fixed or released by regulating the rotation of the protruding piece.

In the case of such locking devices, there are many accidents in which people break into the window from the outside by breaking the window glass near the lock, inserting their hand through there, and unlocking the movable lock. The above problem can be solved by incorporating a key-operated locking mechanism into the movable hook. However, when a key-operated lock mechanism is incorporated, especially since this type of lock device is installed in each sliding door of each window opening in a building, if the key for each lock device is a common key, other locks of the same type cannot be used. Can be unlocked using the device key,
Furthermore, if different keys are used for each locking device, the locks will change for each window, resulting in an increase in the number of keys and creating problems in storing them. In view of such problems, the applicant previously solved the conventional problems by providing a stopper for keeping the movable hook in the locked state and a code lock for regulating the operation of the stopper on the mounting base of the movable hook. A locking device was proposed (Utility Model Application No. 127574, 1983).

However, the movable hook of this type of locking device has a raised wall that engages with the fixed hook on the half periphery of the circular base plate, and an operating piece is continuously attached to the end of this raised wall and the base plate by press working on a metal plate. Since it is integrally formed, the entire hook including the operating piece is strengthened by press working. Therefore, if excessive operating force is applied to the operating piece, the movable hook will climb over the stopper and rotate. It was found that if the lock moved or was not climbed over, the stopper would break and the code lock would not function properly.

Therefore, the object of this invention is to provide a new locking device for a sliding door that eliminates the above-mentioned disadvantages and improves the locking performance by providing a simple means to the operation piece of the movable hook.

<Means for solving the problem> To explain the means of this invention to achieve the above purpose, this invention consists of a fixed hook attached to one sliding door and a corresponding one of the sliding doors of the other side. In the lock device, the mounting base is provided with a stopper that protrudes into the rotation path of the movable hook to prevent movement of the hook, and a stopper is provided on the mounting base to prevent the movement of the hook. The operating piece is provided with a bending means.

<Operation> In the locked state in which the movable hook is engaged with the fixed hook, the stopper protrudes into the path of the movable hook and hooks it, and the stopper is prevented from operating by the code lock. When an excessive operating force is applied to the operating piece, the bending means at the base of the operating piece bends or breaks, and the code lock, fixed hook, and movable hook are kept locked.

<Embodiment> The drawing shows a locking device for a sliding door according to an embodiment of this invention.

As shown in FIGS. 1 and 2, this invention includes a fixed hook 2 attached to one sliding door 1a,
In a locking device that is attached to the other corresponding sliding door 1b and includes a movable hook 3 that engages and disengages from the fixed hook 2, it is provided on the mounting base 36 and appears and retracts from the rotation path of the movable hook, so that both hooks 2, 3, and a code lock 5 connected to the stopper and regulating the operation of the stopper.

The movable hook 3 is a press-molded metal plate, and has a circular recess 32 formed in the center of the base plate 31, and a concentric mounting hole 33 drilled in the recess 32. On the outer periphery of 31, an upright wall 34 with one end low at approximately half the periphery and an operating piece 35 at the other end of the upright wall 34 are formed in series, and this operating piece 35 is provided with a bending means 39. Bending means 39
In this case, a hole is formed in the base of the operating piece 35, or a narrow part or a thin part is formed to reduce the cross-sectional area, so that when an excessive operating force is applied to the stopper, the bending means 39 bends or breaks. Do what you want. The movable hook 3 is rotatably supported between a mounting base 36 and a case 52 of the code lock 5 vertically fixed to the base 36, and is fixed by a fixed protrusion 37 vertically mounted on the mounting base 36. Rotation in the opposite direction is stopped.

The stopper 4 that regulates the locking and unlocking of both hooks 2 and 3 has a through hole 38 formed in the mounting base 36 at a position symmetrical to the fixing protrusion 37, as shown in FIGS. 1 and 3. This stopper 4 is provided inside, and has a tapered surface 41 formed at its upper end that interacts with the movable hook 3, and protrudes and retracts from the base 36 through the through hole 38 to prevent or allow rotation of the movable hook 3. It is connected to the code lock 5 via a swing lever 42 provided in the mounting base 36.

The code lock 5 is attached to the bearing recess 32 of the movable hook 3.
A case 52 is fixed to the base 36 with screws via a presser plate 51 engaged with the shaft hole 53, and has a plurality of cutout windows 54 orthogonally communicating with the shaft hole 53. multiple convex elements 56
an actuating shaft 5 whose shaft end is connected to the swinging lever 42 and is elastically biased by a spring 57;
5, and is engaged with each notch window 54 of the case 52 and is rotatably supported on the operating shaft 55, and has a symbol 5 on the outer peripheral surface.
9 and a plurality of dials 58 that have convex engagement grooves 60 formed in their inner holes and slide relative to the operating shaft 55.

The outer periphery of each dial 58 is marked with an adjacent code 59.
A recess 61 is formed in between, and a spring ball 62 is provided inside the case 52 to apply pressure to the corresponding dial 58, thereby regulating the code position of each dial 58.

The code lock 5 has an unlock code 59 for each dial 58.
A mechanism is provided to freely set the

This mechanism is provided with a bearing bush 63 that can be engaged and detached from each dial 58, and the dial 58 and the bush 6 are connected to each other.
Between the bearing holes of No. 3, protrusions 64 and grooves 65 are formed in accordance with the number 59 on the outer periphery of the dial, and the end surfaces of adjacent bushes 63 are brought into contact with each other,
The springs 66 are engaged to urge the respective dials 58 into engagement, and on the other hand, a hole 67 into which a protruding rod is inserted is formed in the case 52 in correspondence with the operating shaft 55, and a bush 63 is pressurized inside the hole 67. A pressure member 68 is provided.

6 and 7 show other embodiments of the stopper 4. FIG. In this embodiment, two through holes 38 and 38a are bored in parallel to the mounting base 36, and the stopper 4 has a stopper 43 that stops the movable hook 3 and a fingertip-operable protrusion 44 that connects the connecting portion 45. The locking piece 43 and the projecting piece 44 are fitted into the two through holes 38 and 38a from the inside, and the connecting part 45 is connected to the swinging lever 42 as in the previous example.
It is linked to the code lock 5 via.

When the present locking device is attached to a sliding door and the movable hook 3 is in the unlocked position relative to the fixed hook 2, the base plate 31 of the movable hook 3 presses against the stopper 4. At this time, the stopper 4 slides the operating shaft 55 via the swing lever 42 and positions each protrusion 56 in the engagement groove 60 of the dial 58. At this time, the dial 58 does not rotate.

When the movable hook 3 engages with the fixed hook 2, the stopper 4 protrudes out of the base 36 via the operating shaft 55, which is elastically energized by pressure release from the base plate 31, and the swing lever 42, and moves behind the base plate 31. It is located on the side. At this time, the protrusion 5 on the operating shaft 55
6 has escaped from the engagement groove 60 of the dial 58. Now, when the movement of the stopper 4 is to be prevented or so-called locked, when each dial 58 is turned to position the numbers 59 in an irregular arrangement, the engagement groove 60 of the dial 58 is displaced from the protrusion 56 of the operating shaft 55. However, the operating shaft 55 is prevented from sliding. Therefore, the stopper 4 maintains a state of protruding outside the base 36, prevents the movable hook 3 from rotating toward the unlocking side, and maintains the locked state.

In this state, if an operating force stronger than the hook supporting force of the stopper 4 is applied to the operating piece 35, the bending means 39 bends or cuts the operating piece 35, protecting the stopper 4 from climbing over or being destroyed. The lock 5, fixed hook 2, and movable hook 3 are kept locked.

When unlocking, the codes 59 of each dial 58 are arranged in the set order. At this time, the engagement groove 60 of each dial 58 corresponds to the protrusion 56 of the operating shaft 55. When the movable hook 3 is rotated toward the unlocking side in this state, the movable hook 3 is rotated to the corresponding stopper 4.
Pressure is applied to the upper end tapered surface 41 of.

Therefore, the stopper 4 is pushed into the base 36 by sliding the operating shaft 55 against the force of the spring 57 via the swing lever 42, thereby allowing the movable hook 3 to rotate to the unlocking side.

In addition, when changing the unlocking alignment code 59, first align in the previously set code order and make each engagement groove 60 correspond to the protrusion 56, and then insert a push rod through the hole 67 of the case 52 and perform the process. When pressurizing the pressure member 68, the pusher 63 of each dial 58 is pressed by the spring 66.
are compressed and each escapes from the dial 58, and the convex strip 6
4 and the groove 65 are removed, and at this time, the dial 58 is turned to set a new code 59 used for unlocking.
After that, the pressure of the pressure member 68 is released. As a result, each pushbutton 63 engages with the bearing hole of the dial 58 again due to the elasticity of the spring 66, and the setting of the new unlocking code 59 is completed.

<Effects of the invention> As described above, this invention provides a locking device consisting of a fixed hook attached to one sliding door and a movable hook attached to the corresponding other sliding door, which engages and disengages from the fixed hook. The mounting base is equipped with a stopper that protrudes into the rotation path of the movable hook to prevent the movement of the hook, and a bending means is provided on the operation piece of the movable hook, so that if excessive operating force is applied to the operation piece, the operation The piece has the effect of achieving the purpose of the invention with a simple structure, such as by bending or breaking the bending means at the base to maintain the locked state of the code lock, fixed hook, and movable hook.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the installation status of a locking device showing an embodiment of this invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a sectional view taken along the line - in Fig. 1, and Fig. 4. is a sectional view taken along the line - in Fig. 2, Fig. 5 is a longitudinal sectional view of the case of the code lock, Figs. 6 and 7 show other embodiments of the stopper, and Fig. 6 shows the lock. FIG. 7 is a front view of the device, and FIG. 7 is a rear view. 1a, 1b...Sliding door, 2...Fixed hook,
3...Movable hook, 4...Stopper, 35...
Operation piece, 39... bending means.

Claims (1)

[Claims for Utility Model Registration] In a locking device consisting of a fixed hook attached to one sliding door and a movable hook rotatably attached to the corresponding other sliding door and engaging and detaching from the fixed hook. , the mounting base has
This locking device for a sliding door is provided with a stopper that protrudes into a rotation path of a movable hook to prevent movement of the hook, and a bending means is provided on an operating lever of the movable hook. A locking device for a sliding door according to claim 1, wherein the folding means is constructed by punching a hole or forming a narrow portion or a thin portion at the base of the operating lever.