JPS62178675A - Latch structure in gate door lock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

[Conventional technology]

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

However, the above-mentioned conventional gate lock having a latch structure has a disadvantage in that the lock can be broken simply by retreating the latch bolt against the biasing force of the spring, and it lacks 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 launch structure of a gate lock, the movement of the latch bolt under the locked state of the receiving washer of the latch bolt, which is originally retracted against the biasing force of the spring. We have discovered a feature that automatically prevents lock breakage.

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

[Means for solving problems]

Therefore, in order to achieve the above object, the present invention pivots a locking pawl as a locking means that is biased by a spring in a closing direction substantially perpendicular to the protruding direction of the latch bolt to the slanted surface of the latch bolt. A technical means was adopted in which the latch bolt is automatically prevented from retreating by engaging the protrusion with the outer end of the locking rod during locking, thereby locking the latch bolt.

〔Example〕

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

Reference numeral 1 denotes a lock case, and reference numeral 2 denotes a locking rod rotatably inserted into a hole 1a provided on one side of the lock case 1. This locking rod 2 can be inserted into a lock pin by rotating a handle 13, which will be described later. 12 can be freely inserted into the insertion hole 2a to lock the locking rod 2 by restricting its rotation, or to unlock it by allowing the locking rod 2 to rotate. Reference numeral 3 denotes a latch bolt supported by a pin 4 inserted into a long hole 3a provided at the outer end of the locking rod 2 facing in the advancing and retracting direction. It is always biased in the protruding direction by a spring 5 interposed therein. Reference numeral 6 denotes a locking means that is pivotally attached to a notch 3b+ provided in the sloped surface 3b of the latch bolt 3 using a pin 7 and also constitutes a part of the sloped surface 3b of the latch bolt 3. This locking pawl 6 is biased by a tension spring 8 wound around a pin 7 in a closing direction perpendicular to the protruding direction of the latch bolt 3 shown in FIG. In this position, a protrusion 6a provided on the outside thereof becomes engageable with the outer end of the locking rod 2 and 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 l.

11 is a receiving washer that allows the latch bolt 3 to be freely engaged and detached; 11a;
is a tapered surface formed in the receiving washer 11, and 11b is a locking portion on the front surface of the receiving washer 11.

Reference numeral 12 denotes a lock pin, and this lock pin 12 can be freely inserted into the insertion hole 2a provided in the locking rod 2 through a transmission member (not shown) by rotating the handle 13, for example, and thereby the torsion spring 9 The rotation of the locking rod 2, which is in the neutral position, is restricted and locked, or the locking rod 2 is unlocked by allowing rotation.

14 is a cylinder lock.

An embodiment of the present invention has the above-described configuration, and normally, the locking rod 2 receives the biasing force of the spring 9, and the lock pin 12 engages in the engagement hole 2a, so that rotation is restrained. It will be locked due to this.

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

If the latch bolt 3 is pushed in again in this state, the locking pawl 6 forming a part of the slanted surface 6b of the latch bolt 3 will be removed from the locking portion 1 of the receiving washer 11.
1b, the locking rod 2 rotates as shown in FIG. 3 against the biasing force of the torsion spring 9, while the latch bolt 3 is pushed in slightly against the biasing force of the spring 5. . In this way, the latch bolt 3 is attached to the locking portion 1 of the receiving washer 11.
1b, the latch bolt 3 protrudes under 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
The protrusion 6a is restored to its original position by the force of the torsion spring 8.
is engaged with the outer end of the locking rod 2, so 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, allowing the locking rod 2 to rotate and unlocking, as shown in FIG. When the door is pulled in the direction of the arrow from the state shown in , the latch bolt 3 is locked in the locking portion llb and the locking rod 2 is rotated in the direction of the arrow X against the biasing force of the torsion spring 9. The latch bolt 3 is pulled out from the locking portion 11b of the receiving washer 11, 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, the present invention has a locking pawl as a locking means that is biased by a spring in a closing direction that is substantially orthogonal to the protruding direction of the latch bolt, and is pivotally attached to the slanted surface of the latch bolt. By engaging with the outer end of the locking rod, 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, Fig. 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 the same. FIG. 3 is a sectional view of a main part when locked. DESCRIPTION OF SYMBOLS 1... Lock case, 2... Locking rod, 3... Latch bolt, 3a... Long hole, 4... Pin, 5... Spring, 6... Locking claw, 6a... ...Protrusion, 7...Bin, 8...Torsion spring. Patent applicant: Kokusan Metal Industry Co., Ltd. Figure 1 Figure 2 b1

Claims (1)

[Claims] 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 substantially perpendicular 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.