JPH0477794B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a latch structure for a gate lock used, for example, on a gate of a general household.

[Conventional technology]

2. Description of the Related Art Conventionally, for example, gate locks for ordinary homes include a latch bolt that is biased to a protruding position by a spring, and a receiver washer that is provided on the gate to face the latch bolt so that the latch bolt can be freely locked.

However, the above-mentioned conventional gate lock having a latch structure has the disadvantage that the lock can be broken simply by retreating the latch bolt against the biasing force of the spring, resulting in a lack of security, especially in terms of crime prevention.

[Problem that the invention seeks to solve]

Therefore, in order to solve the above-mentioned conventional drawbacks, in the latch structure of a gate lock, the movement of the latch bolt is automatically controlled when the catch washer of the latch bolt is retracted against the urging force of the spring. We have found a way to prevent the lock from breaking.

The present invention has been made in view of the above points, and its purpose is to automatically prevent the movement of the latch bolt when the latch bolt is locked to the receiving washer, thereby preventing the lock from being broken. The purpose of the present invention is to provide a latch structure in a gate lock that prevents the problem from occurring.

[Means for solving problems]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention pivots a locking pawl as a locking means that is biased by a spring in a closing direction substantially orthogonal to the protruding direction of the latchbolt to the slanted surface of the latchbolt. , adopted a technical means of engaging the protrusion with the outer end of the locking rod to automatically prevent the latch bolt from retracting and locking the lock.

〔Example〕

The present invention will be described below with reference to an embodiment shown in the drawings.

1 is a lock case; 2 is a lock rod rotatably inserted into a hole 1a provided on one side of the lock case 1;
This locking rod 2 can be configured such that a lock pin 12 can be freely inserted into an insertion hole 2a by rotating a handle 13 described later to restrict the rotation of the locking rod 2 for locking. The lock is unlocked by allowing movement. Reference numeral 3 designates a latch bolt supported by a pin 4 inserted into a long hole 3a provided at the outer end of the locking rod 2 in the advancing and retracting direction. It is always biased in the protruding direction by the installed spring 5. 6 is the inclined surface 3b of the latch bolt 3
This locking pawl serves as a locking means and is pivotally attached using a pin 7 in a notch _3b1 provided in the latch bolt 3 and constitutes a part of the sloped surface 3b of the latch bolt 3. A torsion spring 8 wound around the pin 7 is biased in the closing direction perpendicular to the protruding direction of the latch bolt 3 shown in FIG. The latch bolt 3 automatically prevents the latch bolt 3 from retreating.

Reference numeral 9 denotes a torsion spring which is wound around the outer periphery of the locking rod 2 inside the lock case 1 to always hold the locking rod 2 in a neutral position during locking. One end 9a is locked to the pin 10, and the other end 9b is locked to the lock case 1.
is locked.

Reference numeral 11 designates a receiving washer from which the latch bolt 3 can be freely engaged and detached, 11a a tapered surface formed in the receiving washer 11, and 11b a locking portion on the front surface of the receiving washer 11.

12 is a lock pin, and this lock pin 12
For example, by rotating the handle 13, the insertion hole 2 is inserted into the locking rod 2 through a transmission member (not shown).
By being able to freely engage in the inside of a, the torsion spring 9
The rotation of the locking rod 2, which is in the neutral position, is restrained to perform locking, or the locking rod 2 is unlocked by allowing rotation.

14 is a cylinder lock.

One embodiment of the present invention has the above-mentioned configuration, and normally the locking rod 2 receives the biasing force of the torsion spring 9.
The lock pin 12 is inserted into the insertion hole 2a and rotation is restrained, thereby locking the lock pin 12.

Therefore, in order to lock the gate, when the door is closed in the direction of arrow A shown in FIG. 11b and rotates about the pin 7 against the urging force of the torsion spring 8, so that the protrusion 6a of the locking pawl 6 is disengaged from the locking rod 2.

If it is pushed in again in this state, the latch bolt 3
The locking pawl 6, which forms a part of the inclined surface 6b, slides on the locking portion 11b of the receiving washer 11, so that the locking rod 2 resists the biasing force of the torsion spring 9 as shown in FIG. On the other hand, the latch bolt 3 is pushed in slightly against the biasing force of the spring 5. When the latch bolt 3 passes over the locking portion 11b of the receiving washer 11, the latch bolt 3 protrudes due to the urging force of the spring 5 and is locked in the locking portion 11b (see FIG. 4). Further, the locking rod 2 is returned to the neutral position by the biasing force of the torsion spring 9.

At this time, the locking pawl 6 pivotally attached to the slanted surface of the latch bolt 3 is returned to its original position by the biasing force of the torsion spring 8, and the protrusion 6a is engaged with the outer end of the locking rod 2. Movement of the latch bolt 3 is prevented.

Moreover, when the handle 13 is rotated to engage the lock pin 12 into the engagement hole 2a, the rotation of the locking rod 2 is prevented and the locked state is achieved.

To open the door, for example, the handle 13 is rotated and the lock pin 12 is pulled out from the insertion hole 2a to allow rotation of the locking rod 2 and unlocked, and then the fourth door is unlocked. If the door is pulled in the direction of arrow B from the state shown in the figure, the latch bolt 3 will be attached to the locking part 11.
b, and the locking rod 2 is rotated in the direction of arrow X against the biasing force of the torsion spring 9.
1, the latch bolt 3 is pulled out from the locking portion 11b, and the lock is released.

When the locking state is released in this way, the locking rod 2 returns to its neutral state due to the biasing force of the torsion spring 9, and the locking pawl 6 also returns to its previous position due to the biasing force of the torsion spring 8, so that the protrusion 6a engages with the outer end of the locking rod 2 again to restrict the retreat of the latch bolt 3 in the protruding position.

〔Effect of the invention〕

As described above, in the present invention, a locking pawl as a locking means that is biased by a spring in a closing direction substantially orthogonal to the protruding direction of the latchbolt is pivotally mounted on the slanted surface of the latchbolt. By engaging the outer end of the latch bolt, the latch bolt can be automatically prevented from retreating, thereby preventing the lock from breaking.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention;
2 is a rear view after assembly, FIG. 3 is a sectional view of the main part before the latch bolt is locked, and FIG. 4 is a sectional view of the main part when the latch bolt is locked. 1... Lock case, 2... Locking rod, 3... Latch bolt, 3a... Long hole, 4... Pin, 5... Spring, 6... Locking claw, 6a... Protrusion, 7... Pin, 8...Torsion spring.

Claims (1)

[Claims] 1. A rotatable locking rod is provided with a latch bolt that is biased to a protruding position by a spring, and a locking pawl that is biased by a spring is pivotally attached to the slanted surface of the latch bolt in a closing direction that is substantially orthogonal to the protruding direction; A latch structure for a gate lock, characterized in that the locking pawl is capable of freely engaging with the outer end of the locking rod at the protruding position of the latch bolt.