JP2001012125A - Door lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a dead bolt from being protruded by centrifugal force to damage a frame or the dead bolt when a door is closed by rotatably supporting a pendulum fitted with a bob at one end, and inclining the pendulum centrifugal force into pressure contact with the dead bolt. SOLUTION: A handle shaft 72 is inserted into an angular hole 71 at the center section of the rotary shaft of a hub 7 rotatably provided on a lock case and is rotated, then an operation section 73 presses a engaging section 11 to retreat a dead bolt 1. A pendulum 6 is provided below the dead bolt 1. The pendulum 6 is provided with a bob 62 having large specific gravity at the lower end section rotatably supported by a rotary shaft 61. The bob 62 is normally located directly below the rotary shaft 61, and the dead bolt 1 can be protruded or submerged without being affected by the pendulum 6 at all. When a door is vigorously closed, centrifugal force is applied to the opening end side of the door, and one end section 63 of the pendulum 6 is brought into pressure contact with the lower frame of the dead bolt 1. The protrusion of the dead bolt 1 is prevented by the pressure contact, and the door is closed with the dead bolt 1 kept at the retreated state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock rod which is normally urged in a retreating direction and is protruded by a magnetic attraction of a lock member on a door frame side when a door is closed. Door lock.

[0002]

2. Description of the Related Art Conventionally, as this kind of door lock, one disclosed in Japanese Patent Application Laid-Open No. 11-81776 filed by the present applicant has been proposed.

[0003]

As shown in FIG. 5 to FIG. 7, when the door is closed vigorously by, for example, wind pressure from the open state of FIG. Due to the applied centrifugal force, before the door is completely closed, the lock rod 1 overcomes the urging force of the spring 50 that urges in the retreating direction and projects as shown in FIGS. 6 and 7. If the lock rod 1 is inadvertently protruded as shown in FIGS. 6 and 7 before the door is completely closed, the door is closed vigorously as it is, so that the linear portion 10 on the side surface of the lock rod 1 is 9, the frame W, the receiving member, the lock rod and the door lock are damaged.

An object of the present invention is to solve the above-mentioned conventional problems, and to prevent the locking rod from being carelessly projected to damage the frame and the locking rod even when the door is closed vigorously. It is like that.

[0005]

In order to achieve the above object,
The present invention provides a lock rod which is normally urged in a retreating direction by a spring, and which is provided in a lock case so as to be retractable by operating a handle, and a magnetic material provided on at least a part of the lock rod. A magnet, and a magnet or a magnetic body provided on the receiving member on the door frame side facing the magnet when the door is closed, and the magnet on the locking rod side and the magnet on the receiving member side when the door is closed. Alternatively, a door lock configured to overcome the urging force of the lock rod in a retreating direction by a magnetic attraction force with a magnetic body to project the lock rod, engage the engagement hole of the receiving member, and lock the door. In the above, the pendulum is pivotably supported on the lock case, and the pendulum is rotated by centrifugal force acting on the tip of the door when the door is closed, and one end of the pendulum is engaged with the lock rod, Do not prevent the lock rod from projecting due to centrifugal force when the door is closed. It is characterized in.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing an opened state and an unlocked state of the door lock of the present invention, FIG. 2 is a front view showing a state before the door is completely closed when the door is vigorously closed, and FIG.
And FIG. 4 is a plan view showing a state in which the door is completely closed.

[0007] Reference numeral 1 denotes a lock rod, which is provided in the lock case 9 so as to be freely retractable. A first spring 50 for urging the lock rod 1 in a retreating direction is provided in front of a spring receiver 41 protruding from the upper frame 4 of the lock rod 1, and a first spring 50 for preventing further retraction by the first spring 50 is provided in the rear. The two springs 51 are provided, and the biasing forces of both springs cancel each other, and the lock lever 1 is held in the state of FIG.

Reference numeral 7 denotes a hub rotatably provided on the lock case 9. A shaft 72 of a handle (not shown) is inserted into a square hole 71 provided at the center of the rotation shaft. The operation part 73 is rotated against the urging spring 8 by the
Pushes the engaging portion 11 provided on the lock rod 1 to move the lock rod 1 backward.

Reference numeral 6 denotes a pendulum pivotally supported by a shaft 61 on a lock case 9 below the lock rod 1, and a weight 62 made of a material having a large specific gravity, such as lead, is attached to the lower end thereof. I have. In a normal state in which the door is opened, the weight 62 of the pendulum 6 holds a state in which the weight 62 is located vertically with respect to the rotation shaft 61 as shown in FIG. In this state, the lock 1
Can move in and out without being affected by the pendulum 6.
Next, for example, when the door is closed more vigorously, such as wind pressure, centrifugal force acts on the open end side of the door, so that the pendulum 6 swings its weight 62 toward the open end side of the door as shown in FIG. Rotate clockwise. Then, one end 63 of the pendulum 6 is
Is pressed against the lower claim. At this time, the lock rod 1 attempts to protrude by overcoming the biasing force of the first spring 50 in the retreating direction due to the centrifugal force acting on the door, but since the one end 63 of the pendulum 6 comes into pressure contact with the lock rod 1, the lock rod 1 protrudes. Will be blocked.

Therefore, the locking rod 1 is closed while maintaining the retracted state shown in FIGS. When the door is completely closed as shown in FIG. 4, the lock rod 1 has a receiving hole 91 formed in a receiving member 9 by upper and lower frames 3 and 4 made of a magnetic member provided in a part thereof.
Into a locked state. At this time, the pendulum 6 is
As a result, the pressed state between the one end 63 of the pendulum 6 and the lower frame 3 of the lock rod 1 is released, so that the weight 62 hangs down and the pendulum is in the state shown in FIG.

Although the shape of the locking rod 1 is not limited in the present invention, in the present embodiment, a locking rod handle 12 made of a non-magnetic material such as plastic and a steel plate or the like surrounding the locking rod handle 13 are used. The upper and lower frames 3 and 4 are made of a magnetic material.
Are pivotally supported by a shaft 21. In the opened and unlocked state of FIG. 1, the position of the axis a of the roller 2 of the lock rod 1 is provided so as to be always located closer to the door than the end face position b of the frame W or the receiving member 7. Close the door and lock the roller 1
When the lock rod 1 comes into contact with the frame W or the receiving member, the lock rod 1 retreats and the door is closed. As shown in FIG. 4, when the lock rod 1 is completely closed, the lock rod 1 projects and becomes locked.

In the locked state, the position of the axis a of the roller 2 of the locking rod 1 projects in the direction of the frame W from the end surface position b of the receiving member a. In this state, a lateral pressure is applied to the door in the door opening direction. However, the roller 2, that is, the lock rod 1 does not retreat and does not open. To open the door, a handle (not shown) is operated to rotate the hub 7 to retreat the locking rod 1 and then open the door.

[0013]

[Modifications] In the embodiment, the pendulum 6 is provided with a separate weight 62 made of, for example, lead or the like at the lower end. The lower end of the pendulum 6 may be formed so as to act as a weight by bending the lower end, or if the space of the lock case 9 has a space, by forming the lower end of the pendulum 6 extremely large.

Although the case where the pendulum 6 is provided below the lock rod 1 has been described, it may be provided above the lock rod 1. In this case, when the lower end of the pendulum 6 to which a weight is attached or acts as a weight is tilted by centrifugal force acting on the open end side of the door, the lower end of the pendulum 6 is positioned above the lock rod 1. Frame 4
What is necessary is just to provide so that it may press-contact.

In addition, the pendulum 6 is provided so as to three-dimensionally intersect with the lock rod 1, and when the pendulum 6 is tilted, a pressure contact portion protruding from the pendulum 6 presses against the side surface of the lock rod 1, thereby causing the lock rod 1 by centrifugal force.
May be prevented from protruding.

[0016]

According to the present invention, the lock rod is constantly biased in the retreating direction, and when the door is completely closed, the magnetic attraction between the magnetic body or magnet on the lock rod side and the magnet or magnetic body on the receiving member side. By
In a door lock in which a locking rod is projected and locked, a pendulum that tilts by centrifugal force acting when the door is vigorously closed by wind pressure or the like is provided, and when the pendulum tilts, one end of the pendulum is locked to the locking rod. By being pressed, the lock rod can be prevented from protruding due to centrifugal force. Therefore, when the door is suddenly closed by wind pressure or the like or when the door is closed vigorously, it is necessary to prevent the locking rod from inadvertently projecting, hitting the locking rod at the frame, and damaging the frame and the door lock. Can be. In addition, a simple structure having only a pendulum and having excellent durability can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing an opened state and an unlocked state of a door lock according to the present invention.

FIG. 2 is a front view of the same when a centrifugal force acts on the door.

FIG. 3 is a partial cross-sectional plan view of the state shown in FIG. 2;

FIG. 4 is a partial cross-sectional plan view showing a locked state with the door completely closed.

FIG. 5 is a front view showing an open and unlocked state of a conventional door lock.

FIG. 6 is a front view of a conventional door lock when a centrifugal force acts on the door.

FIG. 7 is a partial cross-sectional plan view of FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lock rod, 2 ... Roller, 3 ... Upper frame, 4 ... Lower frame, 5 ... 1st spring, 51 ... 2nd spring, 6 ... Pendulum, 62 ... Weight, 7 ... Hub, 9 ... Lock case

Claims (1)

[Claims] 1. A spring is normally urged in a backward direction by a spring,
And a lock rod provided in the lock case so as to be retractable by operating the handle, a magnetic body or magnet provided on at least a part of the lock rod, and facing the magnetic body or magnet when the door is closed. A magnet or a magnetic material provided on a receiving member on the door frame side, and a spring of the locking rod is provided by magnetic attraction between the magnetic material on the locking rod side or the magnet and the magnetic material on the receiving member side when the door is closed. In a door lock which overcomes the urging force in the retreating direction by causing the locking rod to protrude and engage with the engaging hole of the receiving member to lock the pendulum, the pendulum is pivotally supported on the lock case, The pendulum is rotated by the centrifugal force acting on the tip of the door when the door is closed, and one end of the pendulum is engaged with the lock rod to prevent the lock rod from projecting due to the centrifugal force when the door is closed. A door lock characterized by: