JP3447263B2 - Double lock for door - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a double lock on a door of a building.

[0002]

2. Description of the Related Art Various types of door locks have been proposed and used in buildings.

[0003]

The picking technique for opening a lock without using a regular key has been developed as the structure of the lock becomes complicated and a new lock is developed, but any lock is completely stolen. It is virtually impossible to prevent the crime of. Therefore, it has been proposed and implemented to prevent crime by providing two or more locks on one door and making the time required to open the lock as long as possible without using a legitimate key. . It is generally called one-door lock. However, a plurality of keys must be carried, and it is often troublesome to forget or lose a part of the keys, which is not widely used.

Further, when fixing these double locks to a door of a building, it is common to make a hole in the door and attach a fixing tool such as a bolt, and in general, one lock is attached as another lock. However, the installation work was complicated and troublesome, such as having to use a large number of specialized processing tools, so I had to ask a construction shop to do the installation. In addition, various fixing members have to be prepared according to the door thickness.

An object of the present invention is to solve these problems, and a key hole of a physically strong first lock of a door is covered with a lid that can be opened and closed, and the lid is protected by a second lock for picking prevention. Opening, the first lock and the second lock are integrated, and even an amateur can easily fix the double lock to the building door without using a processing tool such as a drill and strengthen the picking prevention. (EN) A double lock for doors, characterized in that the lock body can be moved up and down with respect to the first lock cover by a spring, and the first lock can be tightened and fixed according to the door thickness.

[0006]

The double lock of the present invention is a double lock for a door in which the keyhole of the first lock of the door is covered with a lid that can be opened and closed, and the lid is opened by the second lock. The left and right fixing members divided from the fixing member are fitted from both sides and installed and fixed to the neck portion of the first lock attached to the door by bolts, and the second box frame is coiled around the bolts on the fixing member. The first box frame and the base member of the second lock are fixed to each other by a long bolt on the second box frame up to the fixing member. The fixing member can be moved up and down with respect to the first and second box frames by a coil spring, and the first lock body can be moved up and down with respect to the first lock cover by a spring.

According to the double lock of the present invention, the double lock has an elevating mechanism composed of the coil spring of the fixing member, and the double lock enhances the tightening force to the door, and the first lock main body uses the spring to cover the first lock cover. Since it can be lifted up and down, the first lock can be fixed according to the door thickness.

The double lock of the present invention is characterized in that two kinds of keys for opening and closing the physically strong first lock and the second picking prevention lock are integrated.

[0009]

FIG. 1 is a partial perspective view of a door, FIG. 2 is an exploded perspective view of a split fixing member of a double lock, FIG. 3 is an exploded perspective view of a double lock, and FIG. FIG. 6 is a side view showing a state in which a double lock is attached, FIG. 5 is a side view of an elevating mechanism of a first lock, and FIG. 6 is a perspective view of two types of integrated keys for a double lock.

In FIG. 1, the door 1 is fitted with a handle 2 and a double lock consisting of a physically sturdy first lock 3 and a second picking prevention lock 8. The latch 4 is retracted by operating the first lock 3. The keyhole 3a of the first lock 3 is covered with a lid 7 which is attached so as to be openable and closable. To open the door 1, first insert the second key 9 into the keyhole of the second lock 8 to open the lid 7, and then insert the first key 5 into the keyhole 3a of the first lock 3 and the latch 4 After retracting, the door 1 is opened by the handle 2.

As described above, since the keyhole 3a of the first lock 3 is covered with the lid 7, and the second lock 8 must be operated to open the lid 7, the safety of the first lock 3 is improved. Can be significantly increased.

As disclosed in FIG. 2, the fixing member 14 is divided into left and right fixing members 14R and L, and one fixing member 14R has an inverted U-shaped frame portion 14a at both ends and both inverted U-shaped frames.
The inverted U-shaped frame portion 14a has a screw hole and an elongated hole, and the flat portion 14b has a semicircular portion 14c corresponding to the neck portion 3b of the lock 3. Further, the other fixing member 14L is a flat member having a semicircular shape corresponding to the neck portion 3b of the lock 3 like the flat portion 14b of the one fixing member 14R, and having screw holes at both ends.

As shown in FIG. 2, the fixing member 14 is divided into left and right fixing members 14R and 14L, and the fixing member 14 is installed and fixed to the neck portion 3b of the first lock 3 attached to the door 1 by the bolt 16. , The second box frame 12 is fixed to the fixing member 14 around the bolt 16 with the coil spring 15 interposed, and the base members of the first box frame 11 and the second lock 8 are further fixed. 10 and 10 are fixed on the second box frame 12 to the fixing member 14 by long bolts 17.

FIG. 4 shows a state in which the double lock having the integral structure assembled by the above procedure is attached to the door 1.
The coil spring 13 is contracted to move the first lock 3 into the box frame 1
It can be raised with respect to Nos. 1 and 12 and clamped and fixed according to the plate thickness of the door 1. The fixing member 14 is attached to the door 1 via a coil spring 13 so as to be able to move up and down. Bolt 16
The coil spring 13 forms a lifting mechanism for the fixing member 14 around the. With this configuration, the tightening force of the double lock on the door 1 can be adjusted.

In FIG. 5, the first lock 3 has a head 3h and a neck 3b.
And a cover 3c, and a spring 3d is interposed between the lower edge 3he of the head 3h and the lower edge 3ce of the cylindrical portion of the cover 3c, whereby the first lock main body has the spring 3d.
Since it can be raised and lowered with respect to the first lock cover 3c by d, the first lock 3 can be fastened and fixed according to the door thickness.

FIG. 6 shows the keyhole 3 of the first lock 3 of the double lock.
An example in which a and two types of keys to be inserted into the keyhole 8a of the second lock 8 are integrated is shown. FIG. 6A shows a key in which two types of keys are integrated by a ring, FIG. 6B shows a key having two types of keys on both sides of one member, and FIG. 6C shows two types of keys. A key connected in a number is shown. Since the two types of keys are integrated as described above, it is not necessary to forget or lose one of the keys and to confuse it with other combinations.

As the first lock 3 and the second lock 8, for example, cylinder locks, magnet locks, card locks, ten-key locks, and other types may be appropriately combined and used.

[0018]

According to the present invention, the first lock is a physically sturdy structure, and the second lock is an integral structure for preventing picking. Therefore, even an amateur can easily use a drill or the like. The double lock can be fixed to the existing door of the building without using a processing tool, and the picking prevention can be enhanced.

Since the double lock is equipped with an elevating mechanism for the fixing member to strengthen the tightening force against the door and the first lock body can be moved up and down with respect to the first lock cover by the spring, It can be fixed according to the size. Also, the double lock can be easily assembled without opening a hole in the door or fastening a screw.

According to the present invention, since the two types of keys of the double lock are integrated, it is not necessary to forget or lose one key or to confuse it with other combinations.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a door.

FIG. 2 is an exploded perspective view of a split fixing member of a double lock.

FIG. 3 is an exploded perspective view of a double lock.

FIG. 4 is a side view showing a state in which a double lock is attached to the door.

FIG. 5 is a side view of a lifting mechanism for the first lock.

FIG. 6 is a perspective view of two integrated keys for a double lock.

[Explanation of symbols]

1. ． ． ． ． door 2. ． ． ． ． Handle 3. ． ． ． ． First tablet 3a. ． ． ． First lock keyhole 3b. ． ． ． First lock neck 3c. ． ． ． First tablet cover 3d. ． ． ． First lock spring 3h. ． ． ． First lock head 4. ． ． ． ． Stake 5. ． ． ． ． First key 7. ． ． ． ． lid 8. ． ． ． ． Second tablet 9. ． ． ． ． Second key 10. ． ． ． Base member 11. ． ． ． First box frame 12. ． ． ． Second box frame 13. ． ． ． Coil spring 14. ． ． ． Fixed member 16. ． ． ． bolt 17. ． ． ． Long bolt

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 17/18 E05B 19/14 E05B 35/12

Claims (2)

(57) [Claims] 1. A door double lock in which a keyhole of a first lock of a door is covered with a lid that can be opened and closed, and the lid is opened by a second lock,
The divided left and right fixing members of the fixing member are fitted from both sides and installed and fixed by a bolt on the neck portion of the first lock attached to the door, and the second box frame is attached to the fixing member by a coil spring around the bolt. The first box frame and the base member of the second lock are fixed on the second box frame to the fixing member by long bolts to form an integral structure. A double door door characterized in that the fixing member is moved up and down with respect to the first and second box frames by a coil spring, and the first lock body is moved up and down with respect to the first lock cover by a spring. Tablets. 2. A double lock for a door according to claim 1, wherein two types of keys for opening and closing a physically strong first lock and a second picking prevention lock are integrated. .