JPH0249328Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a lock in which a latch bolt is retracted by operating a lever.

[Conventional technology]

In the above-mentioned type of lock, one lever is pulled and the other lever is pushed to rotate the L-shaped swinging pieces, and the latch bolts that engage the swinging pieces are retracted.

[Problems to be solved by the invention] When locking, the dead bolt is pushed out by the thumb turn operation, so the lock becomes larger due to the parallel arrangement of the latch bolt and dead bolt, and the number of parts increases, which increases the unit price of the product. There was a problem where the amount was high.

Another problem was that two metal fittings, a latch bolt and a dead bolt, were required on the stile of the door frame.

[Means for solving problems]

In order to solve the above problems, this idea
In addition to incorporating a slider that goes up and down by operating the thumb turn provided on the indoor seat in both seats,
An engaging portion is provided at the lower edge of the slider and near the pivot point of the lever to engage with each other as the slider descends to prevent pivoting of the lever.

[Effect]

In this invention, when the door is to be turned after closing, the engaging portion of the slider and the lever is engaged while lowering the slider by operating a thumb turn.
Prevents lever rotation.

〔Example〕

In the figure, A is a door, and a recess 1 facing inward from the stile surface of the door A has a latch bolt head 3 at the tip that can be moved forward and backward by a spring 2 to project from the stile surface. A latch bolt 4 is buried.

Furthermore, seats 5 and 6 are attached to the inner and outer surfaces of the door A, facing each other with the latch bolt 4 interposed therebetween.

The above seats 5 and 6 are attached by, for example, screwing bolts inserted into the indoor seat 5 into the indoor seat 5.

Furthermore, a through-hole 7 is provided in both seats 5, 6 that penetrates the front and back surfaces, and the base portions of the levers 8, 9 are passed through the through-hole 7 in a swingable manner. The base portions of the levers 8, 9 are rotatably attached to the pin 10.

Further, on both seats 5 and 6, the ends of planar L-shaped rocking pieces 12 and 13 that face inwardly and engage with the locking portion 11 of the latch bolt 4 are provided. are rotatably supported via pins 14, respectively.

At the base of the lever 8, there is a pin 15 that comes into contact with the edge of the swinging piece 12 when the lever 8 is pushed and rotates the swinging piece 12 counterclockwise in FIG. A pin 16 is provided which comes into contact with the edge of the swinging piece 13 when the lever 9 is pulled to rotate the swinging piece 13 clockwise in FIG.

Further, a thumb turn 17 is provided on the indoor seat 5, and a thumb turn 17 is provided in both seats 5 and 6.
A slider 18 is provided which is raised and lowered by the operation of the slider 18.

The slider 18 is raised and lowered by using a rotating shaft 19 whose both ends face into the seats 5 and 6 so as to be rotated by operating the thumb turn 17 in the illustrated case.
The projecting piece 20 provided on the outer periphery of both ends of the
0 is fitted into the notch 21 provided in the slider 18 so that the slider 18 is raised and lowered as the protruding piece 20 is displaced in the vertical direction; however, other structures may be used to raise and lower the slider 18. .

Further, at the base of the slider 18 and the levers 8, 9, there are engaging portions 2 that engage with each other as the slider 18 descends to prevent the levers 8, 9 from rotating.
2 and 23 are provided.

In the illustrated case, the above-mentioned engaging parts 22 and 23 include a protrusion protruding from the lower edge of the slider 18 and levers 8 and 9.
Although the through-hole provided at the base of the holder is fitted and engaged with the holder, other structures may be used.

In the figure, 24 is a leaf spring for a rotation stopper of the rotating shaft 19, and 25 is a return spring for the swinging pieces 13, 13.

The lock according to this invention has the above configuration,
From inside the room, push the lever 8 and rotate the swinging piece 12 using the pin 15. From outside, pull the lever 9 and rotate the swinging piece 13 using the pin 16, and use the swinging pieces 12 and 13 to move the latch bolt 4. Pull back to open door A.

Next, after the door 1 is closed, the protruding piece 20 and the notch 21 are rotated by the thumb turn 17 while rotating the rotary shaft 19.
to lower slide 18, and slider 1
By locking the engaging portions 22 of 8 and the engaging portions 23 of levers 8 and 9, rotation of the levers 8 and 9 is prevented, and the latch bolt 4 no longer slides in the retracting direction, resulting in a locked state. becomes.

〔effect〕

As mentioned above, according to the lock related to this invention,
Since the slider is slid by the thumb turn operation and the engaging portions that engage with each other prevent the lever from rotating, the latch bolt cannot be retracted by the lever, resulting in a locked state.

Therefore, there is no need to install a dead bolt in parallel with the latch bolt.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional plan view of the lock according to this invention, Fig. 2 is a partially cutaway rear view showing the main parts of the same, Fig. 3 is a vertical cross-sectional front view of the same, Fig. 4 is a cross-sectional plan view of the thumb turn, and Fig. 4 is a cross-sectional plan view of the lock. FIG. 5 is a cross-sectional plan view of the shaft portion of the lever. A...door, 1...recess, 2...spring, 3...
...Latch bolt head, 4...Latch bolt, 5,
6...Seat, 7...Passion window, 8, 9...Lever, 1
0... Pin, 11... Locking part, 12... Rocking piece,
13... Rocking piece, 14, 15... Pin, 16...
Pin, 17...thumb turn, 18...slider,
19... Rotating shaft, 20... Protruding piece, 21... Notch, 22, 23... Engaging portion.

Claims (1)

[Scope of utility model registration request] A latch bolt that is buried inward from the vertical stile surface of the door and whose tip protrudes from the vertical stile surface by a spring and can move forward and backward; a seat that is attached to the inner and outer surfaces of the door so as to face the latch bolt; The tips of the levers rotatably attached to both seats are engaged with the latch bolts, and when one lever is pushed or the remaining lever is pulled, the latch bolts are rotated in the direction to pull them back. In a lock consisting of a swinging piece, a slider that is raised and lowered by operating a thumb turn provided on the indoor seat is installed in both seats, and the lower edge of this slider is located near the pivot point of the lever. The lock is further provided with engaging portions that engage with each other as the slider descends to prevent rotation of the lever.