JP2006328712A - Multi-latch mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch mechanism without power capable of solving problems in a conventional latch mechanism wherein, in many entrance doors of present apartments, a rubber sealing material is fitted to frames, and in these doors, the airtightness of the doors cannot be maintained unless the doors are strongly tightened, in addition, since a door closer and a lock are not so powerful as to tighten the doors, if the tightening of the sealing material is weakened, draft occurs and soundproofness of the doors is reduced, and when a strong tightening is requested, the doors are not fully closed by themselves and a latch bolt cannot be applied. <P>SOLUTION: This multi-latch mechanism of the latch bolt comprises a function to tighten the door by the longer projected amount of the latch bolt by turning a handle upward to project the latch bolt longer in addition to a conventional function to merely draw the latch bolt. The door is tightened by turning the handle upward after the door is closed. A required tightening can be provided by this mechanism since the handle is turned manually. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a technique of a latch bolt having two kinds of functions of retracting and protruding from a fixed position by turning a handle.

Many of the entrance doors of current apartments and condominiums have neoprene rubber or airtight rubber as the airtight material on the frame.
In such a door, in order to ensure the hermeticity of the door, it is necessary to close the door strongly to some extent and tighten the rubber.
However, a door closer for preventing a sudden closing is used for a general door. In a door to which the door closer is attached, rubber tightening at the time of closing the door is weak.
If it does so, a sufficient airtightness of the door will not be maintained, a draft will be generated, and the soundproofing property of the door will be reduced.
However, if the rubber is tightened strongly, the door cannot be locked because the latch bolt of the lock does not latch to the lock receiver.

One of the latch mechanisms is a double action latch mechanism. This is also called a deadlocking latch bolt, and when the door is closed, the latch bolt protrudes from the fixed position and is fixed.
However, there is no function to tighten the door, and it cannot be used for the technology to solve the problem.
JP-A-2004-44098

The challenge is to secure the doors tightly and to ensure airtightness and soundproofing. Moreover, it is a problem to realize it by the function of the lock without using electric power, by operating the lock.

I thought about tightening the door with the movement of the latch bolt of the lock.
That is, it was considered to operate the latch bolt by turning the handle as a handle in the upward direction opposite to the normal use. By turning the handle upward, the latch bolt protrudes further from the normal position where it protrudes normally, and the door is tightened with the protruding width.

However, the door cannot be tightened with a latch bolt only by protruding.
Therefore, the technique disclosed in Japanese Patent Application No. 2002-199530 (Japanese Patent Application Laid-Open No. 2004-44098) is used for the latch bolt. That is, the lock technology having a back taper on the latch bolt is used. That is the back taper (5) of FIG. 1 of that application. The back taper of Japanese Patent Application No. 2002-199530 (Japanese Patent Application Laid-Open No. 2004-44098) eliminates the gap between the latch bolt and the lock receiving hole, and prevents the door from shaking due to wind or the like and making a rattling sound.
The latch bolt with the back taper of Japanese Patent Application No. 2002-199530 (Japanese Patent Application Laid-Open No. 2004-44098) does not have a force to tighten the door. This is combined with the mechanism of the present invention, and the door is tightened by rotating the handle of the latch bolt and projecting it from the fixed position.
By turning the handle by hand, a certain level of tightening strength is possible.

Another effect can be expected from the protrusion of the latch bolt.
It can be locked with a latch bolt.
By fixing the protruding latch bolt, it becomes possible to make the latch bolt act as a dead bolt.

The multi-latch mechanism of the invention will be described with reference to the drawings.
FIG. 2A shows the position of the component in a localized state where the door is opened and the hand is released from the handle.
A latch cam (12) and a protruding cam (13) are provided on the latch cam shaft (10).
The handle spring cam (15) is a spring receiver for the handle spring (16) for returning the handle to a horizontal position when the handle is rotated downward.
The cam spring (14) is a spring that returns the handle to a normal position when the handle is turned upward.
The handle shaft (11) of the handle (7) is assembled to the axis of the latch cam shaft.

FIG. 2B shows that the handle is turned downward and the latch bolt (4) is retracted.
In this state, the door is unlocked and the door can be opened.
By turning the handle downward, the latch cam pulls the latch bolt and retracts.
When the hand is released from the handle, the latch cam shaft (10) is pushed by the handle spring to return to the normal position, and the latch bolt returns to the normal position (19) by the latch spring (18), resulting in the state of FIG. 2A.

FIG. 3A shows that the handle is turned upward and the latch bolt (4) is protruded from the normal position (19) to the protrusion position (20).
When the handle is turned up, the protruding cam (13) pushes the latch bolt and protrudes.

FIG. 3B shows a state in which the hand is released from the handle from FIG. 3A.
The latch cam shaft (10) is pulled by the cam spring (14) to return to the home position.
However, the protruding latch bolt (4) tightens the door, and a lateral pressure is applied to the latch bolt. Therefore, the latch cam shaft stops at the position where the latch cam (12) hits the latch cam receiver (21).
Therefore, the handle position (8) is a position rotated slightly above the horizontal position which is the normal position.

The mechanism for protruding the latch bolt (4) and pushing the door in the closing direction is based on the back taper (5) of the latch bolt in FIG.
The weight of the rotation when the handle is turned up and the latch bolt is pushed out depends on the strength of the door.
In this state, the handle is rotated downward, and the weight of the rotation when the latch bolt is retracted is also proportional to the strength with which the door is tightened.

In general, when you try to open the door, you feel uncomfortable if you turn the handle too heavy.
If the handle position is returned to the horizontal position in the state of FIG. 3B, the user feels uncomfortable when turning the handle to open the door.
As shown in FIG. 3B, if the handle position (8) is slightly higher than the horizontal position, which is the normal position, the handle is turned by knowing that it is heavy when turning the handle, and there is no sense of incongruity.
Also, just looking at the handle position shows that the lock is tightening the door.

When the latch bolt is protruded, the handle position is turned up to 45 degrees upward, and when the hand is released, the handle is returned to the position. The reason why the person who tried to open the door turns the handle is 45 degrees upward. This is because it is difficult to grip with the handle.
When the handle is turned downward from FIG. 3B, the latch bolt (4) is retracted, resulting in the state of FIG. 2B. Then, when the hand is released, the state shown in FIG. 2A is obtained.
When the door is closed in this state, the latch bolt (4) comes into contact with the lock holder and is pulled in, enters the lock receiving hole and protrudes to the fixed position (19), and the door is locked as shown in FIG. 2A.

At the entrance doors of apartments and condominiums, door closers and locks did not have the power to tighten the doors, so there was a breeze around the doors, the surrounding sounds could be heard indoors, and the indoor sounds leaked to the outside.
By providing the multi-latch mechanism of the present invention on the entrance lock, the door can be tightened by turning the handle upward after closing the door, and the airtight effect of the door can be enhanced to stop the draft and improve the soundproofing of the door. it can.

The multi-latch mechanism of the invention is used for a lock of the type in which the latch bolt (4) is retracted by turning the handle (7) of the lever handle type. Even if it is used as a grip-shaped lock with a round handle, it is difficult to use and less effective.
As long as the lock has a latch bolt, it can be used in common with either a lock with a dead bolt (3) or an empty lock without a dead bolt.

In assembling the multi-latch mechanism of the invention to the lock, the most important part is the force relationship of each spring.
The handle spring (16) needs to have a force to match the weight of the handle (7) and to return the handle to a horizontal position.
The latch spring (18) only needs to have a force to return the latch bolt (4) from the retracted position to the stereotaxic position (19), and a weak force is good. If it is too strong, the latch bolt will not be pulled in when the door is closed with the door closer, and the door cannot be locked automatically.

The stroke of the latch spring may protrude the latch bolt to the protruding position (20), but the combination of the springs becomes easier if the stroke is set to the protruding width to the normal position (19).
In FIG. 3A and FIG. 3B, the latch spring (18) is shown in a stereotaxic position for that purpose.

The cam spring (14) may be strong enough to return the handle to a horizontal position when the handle is turned upward. If the stroke of the latch spring is set to the fixed position, the handle tries to return to the fixed position with its own weight even if the cam spring force is weak. Therefore, the cam spring force can be small enough to stabilize the handle without rattling.
When the stroke of the latch spring (18) is increased to the latch bolt protruding position (20), it is difficult to balance the forces of the cam spring and the latch spring.

It is an external appearance perspective view of the lock | rock with the mechanism of invention, and shows the state of FIG. 3B which protruded the latch bolt. A. The AA cross section of FIG. 1 shows the localization state in which the door is opened and the hand is released from the handle. B. The handle is turned downward and the latch bolt is retracted. A. The handle is turned up, and the latch bolt is projected to the protruding position. B. The latch bolt is projected to the projected position and the hand is released from the handle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock front 2 Lock case 3 Dead bolt 4 Latch bolt 5 Back taper 6 Cylinder 7 Handle 8 Handle position 9 Dressing seat 10 Latch cam shaft 11 Handle shaft 12 Latch cam 13 Ejecting cam 14 Cam spring 15 Handle spring cam 16 Handle spring 17 Handle spring stopper 18 Latch spring 19 Positioning position 20 Protruding position 21 Latch cam receiver

Claims (1)

Turn the handle (7) downward to retract one latch bolt (4) from the normal position (19), which is the normal protruding position, and rotate the handle upward to protrude the latch bolt from the fixed position. (20) A multi-latch mechanism for latch bolts, characterized by protruding up to 20.