JPH0721781Y2 - Lock - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock of a type in which a latch head is inverted and retracted by operation.

[0002]

2. Description of the Related Art When a lever or a grip ball is operated at the time of opening a door, the lever or the grip ball is pulled at the same time, so that the latch head is pressed against the edge of the through hole of the metal fitting.

For this reason, the sliding of the latch head is hindered so that the door cannot be opened smoothly, which is particularly noticeable when the door is opened in a hurry.

Therefore, as disclosed in Japanese Utility Model Laid-Open No. 62-89475, the operating plate is pushed from one side of the door, and the operating plate is pulled from the other side of the door to rotate the wing piece and the projecting body. When the moving body is rotated, the inversion prevention of the inversion prevention mechanism is released via the interlocking mechanism. As a result, the latch head is reversed by the force in the opening direction acting on the door in accordance with the operation of the operation plate, and the latch head is pushed back into the lock box to smoothly and surely open the door.

[0005]

A reversing prevention mechanism is provided by pulling back the slide frame through an interlocking mechanism of the upper edge portion of the slide frame while rotating the rotary body by the protrusion and the blade that are engaged by the operation plate. Since the projection is made to escape from the recessed portion that is formed, the pullback force of the slide frame is biased to the upper edge portion of the slide frame. Therefore, a pullback force and a force in the rotation direction act on the slide frame to generate a twisting force, which causes a problem that the slide frame cannot be smoothly pulled back.

Therefore, an object of the present invention is to provide a lock in which the force of the operation plate is smoothly transmitted to the inversion prevention mechanism.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention proposes to push one side operation plate of a plate mounted at a position sandwiching a double-sided lock box of a door and pull the other side operation plate to lock the lock. In addition to releasing the inversion prevention of the inversion prevention mechanism of the latch head provided at the tip of the slider in the box, the lock is retracted together with the slider while reversing the latch head against the restoring force acting on the door against the restoring force. , The ends of both rocking plates, in which the tip ends of the slider which are opposed to each other above and below are superposed, are rotatably mounted, and a tuning and turning mechanism is provided on both of the rocking plates. Protrusions projecting rearward from the two rocking plates are provided so as to be located above and below, sandwiching a projecting body projecting vertically in the lock box. The inverted blocking tongue of the latch head circumscribing the distal end of the de-installed, the is obtained by employing the structure imparted with return rotation of the direction of pull at least one projecting member on the rocking plate.

[0008]

[Function] When the operation plate is pushed from one side of the door and the operation plate is pulled from the remaining one side of the door, either one of the operation plate side protrusions moves upward and the other operation plate side protrusion moves downwards. Since one of the projecting pieces is pushed back in the separating direction, both of the projecting pieces rotate in the opening direction by the tuning mechanism.
Therefore, the tongue piece comes off from the latch head while rotating both swing plates.

The latch head with the tongue disengaged is inverted by the force in the opening direction acting on the door, and the latch head sinks into the lock box.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 denotes a lock box which is fitted inwardly from a vertical frame surface of a door A to be mounted, and a front wall 2 of this lock box 1 is provided with a through window 3.

In the lock box 1, there is incorporated a slider 5 whose tip is aligned with the through window 3 and which is pushed out toward the front wall 2 by a spring 4. The slider 5 includes a vertical plate 6 and a vertical plate 6 which is continuous from the upper and lower edges of the vertical plate 6.
And a horizontal plate 7 which is opposed to the upper and lower sides on one side, and a spring 4 is interposed between the end receiving seats 8 of both horizontal plates 7 and the rear wall 9 of the lock box 1.

Reference numeral 9 denotes a latch head penetrating the through window 3. The latch head 9 has a distal end portion fitted between the horizontal plates 7 of the slider 5 and a corner of one end of the upper flat plate 7 via a vertical pin 10. The parts are mounted so that they can intervene.

Reference numeral 11 is a spring that gives the latch head 9 a return-turning property.

On both sides of the door A, a pair of plates 12 and 12 'facing each other with the lock box 1 sandwiched therebetween are attached. As shown in FIG. 3, the plates 12 and 12 'are attached by screwing the screw shaft 14 inserted into the through hole 13 of the indoor side plate 12' into the screw hole 15 of the outdoor side plate 12 to attach both plates 12 and 12 '. It is designed to attract each other.

Further, a recessed portion 16 which is recessed inward from the surfaces of both plates 12 and 12 'is provided, and in each recessed portion 16, when one is pulled and the other is released from pushing, the plates are released. There are provided operation plates 18 and 18 ′ that are returned and rotated by a spring 17 so as not to project from the surface of 12 and 12 ′ and are swingably supported by a pin 19.

Further, on the back surfaces of both operation plates 18 and 18 ',
Two front and rear projections 20 and 21 which are fitted into the lock box 1 are provided.

Further, the ends of both rocking plates 22 and 23 in which the top and bottom facing one ends of one end of the slider 5 are superposed are rotatably supported by pins 24, respectively, and the two rocking plates 22 are also supported. , 23 are provided with a tuning mechanism 25 that rotates when both rotate in synchronization with each other.
Although the tuning mechanism 25 is configured by fitting the hole and the pin, the tuning mechanism 25 may be synchronized by a method other than the above.

Further, the rocking plates 22 and 23 are provided with two upper and lower rows of projecting pieces 26 and 27 so as to sandwich both the projecting bodies 20 and 21.

Furthermore, at the tips of both swing plates 22 and 23,
A tongue piece 28 for preventing inversion of the latch head 9 is provided so as to project forward from each other and circumscribe the outer end of the latch head 9.

Numeral 29 is a spring that gives return swingability to the two rocking plates 22 and 23 so as to draw the two projecting pieces 26 and 27 together.

The lock according to the present invention is constructed as described above, and the operation plate 18 is pulled from one side of the door A (outdoor) and the operation plate 18 'is pushed from the other side (indoor) of the door A. And the contact between the protruding piece 26 and the protruding body 20 or the protruding piece 27.
Since either one of the projecting pieces 26 and 27 is pushed back by the contact between the projecting piece 21 and the projecting body 21, both the projecting pieces 26 and 27 are pushed by the tuning mechanism 25.
27 rotates in the opening direction.

Therefore, both tongue pieces 28, 28 are disengaged from the terminal step 31 of the latch head 9 while rotating both swing plates 22, 23 integral with the projecting pieces 26, 27.

The latch head 9 with the tongue 28 disengaged is inverted by the force in the opening direction acting on the door A and is inverted and retracted in the lock box 1.

The slider 5 is pushed back as the latch head 9 is turned upside down.

[0025]

[Effect] As described above, according to the lock according to the present invention,
By pushing or pulling the operation plate to push back both projections in the opening direction by the tuning mechanism and rotating both swing plates, the tongue for preventing inversion of the latch head is removed from the latch head. The tongue piece is disengaged and the latch head can be smoothly and surely inverted and immersed.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a lock according to the present invention.

FIG. 2 is a transverse plan view of the same as above.

[Figure 3] Rear view of the same section

FIG. 4 is a vertical sectional side view in which the latch head is inverted and immersed.

FIG. 5 is a transverse plan view of the above.

[Explanation of symbols]

 1 Lock Box 2 Front Wall 3 Through Window 4 Spring 5 Slider 9 Latch Head 10 Pin 11 Spring 12 Plate 18, 19 Operation Plate 20, 21 Projection Body 22, 23 Swing Plate 25 Tuning Mechanism 26, 27 Projection Piece 28 Tongue Piece 29 Spring 31 step

Claims (1)

[Scope of utility model registration request] 1. A latch head reversal prevention mechanism for a latch head provided at the slider tip inside a lock box when one side operation plate of a plate attached to a position sandwiching a double-sided lock box of a door is pushed and the other side operation plate is pulled. In addition to releasing the reversal prevention, the latch head is retracted against the return force against the releasing force acting on the door while being retracted together with the slider. The ends of both rocking plates are rotatably mounted, and a tuned turning mechanism is provided on both rocking plates, and they are located vertically above and below the operating plate, with a projecting body protruding vertically in the lock box. So as to project rearward from both of the swing plates, and further, a tongue piece for preventing inversion of the latch head, which is continuous from the tips of the both swing plates and circumscribes the end of the latch head. The lock is characterized in that the at least one rocking plate is provided with return rotatability in a direction to draw the protrusion.