JPH08100559A - Reverse mechanism of lock - Google Patents

Abstract

PURPOSE: To provide an actuation mechanism of a new latch which is simple in the structure and production. CONSTITUTION: A lozenge column-shaped latch block 3 is forced to slide forward and rotate to one direction. A fixing piece 30 is provided at the rear end of the latch block 3. A slide member 5 made to linearly displace back and forth through a connection member 7 by an outside control member of the door is installed within a lock box 1. The slide member 5 is provided with a returning spring 8 to force it to move forward and also a stopper 50 selectively restricting the fixing piece 30 of latch block 3 in the state that the door is closed at one side of the reverse of the latch block 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a lock reversing latch mechanism suitable for use in gates and the like.

[0002]

2. Description of the Related Art As a conventional reverse latch mechanism of this type, for example, a mechanism described in Japanese Utility Model Publication No. 3-6773 can be cited. The latch lock disclosed in the publication has a structure in which a pair of upper and lower locking pieces can prevent or allow the inversion of the latch head (latch block), so that the latch lock is highly safe in the locked state and the locking / unlocking operation is smooth. However, there is a drawback in that the operation mechanism including the pair of lock pieces that are fitted into and disengaged from the groove of the latch head is extremely complicated, and the manufacturing of the entire latch lock is troublesome.

[0003]

SUMMARY OF THE INVENTION The reversing latch mechanism for a lock according to the present invention improves the smoothness of the locking and unlocking operation by modifying the operating mechanism for preventing the reversal of the latch block or for freely reversing the latch block. Without losing, the overall structure is simple and easy to make.

[0004]

In order to achieve the above object, a reversing latch mechanism of a lock according to the present invention is capable of sliding and reversing a latch block composed of a columnar body having a substantially rhombic plan shape in a lock box. Mountable so that the front half of the lock box can be retracted through the opening of the front plate of the lock box; the latch block is at least one spring provided in the lock box,
Energize it to slide forward and rotate it in one direction; provide an engaging piece at the rear end of the latch block; externally operate the door in the lock box A sliding member that can be directly displaced back and forth by a member through a linking member; the sliding member includes a return spring that biases the sliding member forward; and The condition is that a stop piece for selectively restraining the engagement piece of the latch block on one side of the inversion of the latch block in a normal state where the door is closed is provided.

[0005]

In the closed state of the door shown in FIGS. 1 and 2, the latch block 3 is biased by the spring 4 and is in the projecting position, and is engaged with the strike 2 of the door frame (not shown).

At this time, the sliding member 5 to which no external force is applied from the external operating member such as the handle is pulled forward by the urging force of the return spring 8, and the stop piece provided on the sliding member 5 is pulled. Reference numeral 50 holds the engagement piece 30 at the rear end of the latch block 3 together with the latch block 3 in a non-reversible manner.

Therefore, as clearly shown in FIG. 2, the latch block 3 constrained to one side (first angular position) of the inversion.
Unless the external operation member is operated, the protruding tip end portion is held in a state of being engaged with the strike 2.

In the normal state of FIG. 2 with the door closed, when the external operating member is rotated, for example, the sliding member 5 is displaced rearward through the linking member 7, so that the stop piece 50 of the sliding member 5 is used. The restraint on the engagement piece 30 of the latch block 3 is released (see FIG. 5).

Here, as shown in FIGS. 5 to 8, when the door is pushed or pulled in the direction of arrow A by an external operating member or the like, one of the slopes 31 at the tip of the latch block 3 is pushed by the strike 2. As a result, it is pushed into the lock box 1 while rotating around the central axis (vertical axis of the central portion of the latch block), and is thus inverted.

That is, the latch block 3 is rotated toward the other side (second angular position) of the inversion (see the position in FIG. 7).

When the door is further pushed and pulled from the state of FIG. 8, the tip of the latch block 3 separates from the strike 2, so that the latch block 3 moves in the opposite direction (clockwise in FIG. 8) by the repulsive force of the spring 4. (See FIG. 9).

The state of FIG. 9 shows a state in which the door is opened. Here, when the hand is released from the external operation member, the stop piece 50 is released.
Is displaced by the distance d together with the sliding piece 5 by the urging of the return spring 8 and returns to the front position similar to the normal state.

Next, to close the door from the open state (see FIG. 9), as shown in FIGS. 10 and 11, the door may be pushed or pulled back in the direction of arrow B, and the latch block 3
The other slope 32 at the tip of the lock box 1 is pushed against the biasing force of the spring 4 by the strike 2 pushing the lock box 1 once.
After being pushed in, it projects again due to the biasing force of the spring 4, and returns to the initial closed state (see FIG. 2).

At this time, the latch block 3 receives a rotational moment in the clockwise direction in FIGS.
Be guided to the side of.

In order to operate the latch block 3 when closing the door, the stop piece 50 and the sliding member 5 are used.
May be left at the front position, in other words, it is not necessary to rotate or swing the external operation member.

That is, when the door is closed, the operation of the latch block 3 is not hindered whether the stop piece 50 is at the front position or the rear position.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 to 4, reference numeral 1 is a lock box fixed to a door (not shown), 11 is a front plate of the lock box 1,
Reference numeral 12 is an opening of the front plate 11, 13 is a box-shaped guide frame provided in the lock box 1 for guiding the latch block 3 described later, 2 is a strike fixed to a door frame (not shown), 21
Shows the engaging holes of the strike 2, respectively.

A columnar body having a substantially rhomboidal plane, that is, a latch block 3 formed of a rhomboidal body is slidably and reversibly mounted in a guide frame 13 fixed to the lock box 1.
The front half of the front plate 11 can be inserted into and retracted from the guide frame 13 of the lock box 1 through the opening 12 of the front plate 11.

Reference numeral 31 denotes one slope in the front half of the latch block 3, and 32 denotes the other slope.

The latch block 3 is urged by at least one compression spring or any other spring 4 provided in the guide frame 13 of the lock box 1 so as to slide forward, and in one direction. It is urged to rotate (reverse) toward.

The spring 4 in the illustrated example is a single compression spring, the front end of which is received by a mounting hole 33 which is provided substantially horizontally in the rear half of the latch block 3 and which also serves as an escape hole, and the rear end of which is a guide frame 13. It is mounted between the latch block 3 and the guide frame 13 so as to be received by the bottom plate. Reference numeral 14 is a guide frame 1
3 is a stopper piece of a spring provided on the bottom plate.

The receiving surface 34 of the spring 4 in the mounting hole 33 is formed so as to be substantially parallel to the front plate 12 when the latch block 3 is normally projected as shown in FIG. One widthwise side wall (lower wall in FIG. 2) of the hole 33 is cut off.

One of the configurations of the mounting hole 33 as described above is that the single spring 4 biases the latch block 3 forward and the biasing force directed to one side in rotation (FIG. 2).
And a biasing force directed in a clockwise direction).

That is, when the receiving surface 34 of the mounting hole is inclined as shown in FIG. 6 or 7, the lower spring portion in these figures is compressed more than the upper portion.

Therefore, the elastic force in the lower part of the spring 4 becomes larger than that in the upper part, and a difference in the elastic force causes a clockwise moment in the latch block 3.

Another significance of the existence of the mounting hole 33 is to allow the spring 4 to escape when the latch block 3 is reversed.

However, the spring 4 is not limited to a single one as in the illustrated example, and a plurality of springs may be provided, and the type of the spring may be arbitrarily selected.

Further, engaging pieces 30, 30 forming a pair in the upper and lower directions are integrally and separately provided on the upper and lower surfaces of the rear end portion of the latch block 3 as one body or as separate bodies. It is preferable that the engagement piece 30 has a columnar shape so that the engagement piece 30 can be smoothly operated in engagement and disengagement with the stop piece 50 described later.

As described above, the forward sliding of the latch block 3 is restricted. The front plate 11 is provided with the low triangular prism-shaped projections 35 formed by integrally projecting on the upper and lower surfaces of the latter half of the latch block 3. It may be performed by contacting the back surface of the.

1, 3 and 4, reference numerals 5 and 5
Indicates a pair of sliding members which are provided inside the lock box 1 and are slidably operated back and forth through the linking members 7, 7 by an external operation member (not shown) of the door.

Each sliding member 5 is made by bending a metal plate, for example, and in the illustrated embodiment, the entire shape thereof is substantially L-shaped. In the illustrated example, reference numeral 51 is a sliding member 5.
A horizontal piece forming the front part of the above and a vertical piece 52 forming the rear part thereof.

The pair of upper and lower sliding members 5, 5 respectively have stop pieces 50, 50 formed by further bending a horizontal piece 51 downward or upward at the front portion thereof.

Each sliding member 5 is slidably guided back and forth within a required range by a guide means 6 of an arbitrary type provided between the lateral piece 51 and the lock box 1. The guiding means 6 in the illustrated example is configured by combining a long hole provided in the lateral piece 51 and a pin fixed to the lock box 1, but the type and the number of this guiding means are arbitrary.

Further, each sliding member 5 and the guide frame 1 in the lock box 1
A tension spring or any other return spring 8 is provided between the fixed attachment piece 15 provided on the third member 3 and the like, and the slide member 5 is biased forward by the return spring 8.

Then, the stop piece 50 on the sliding member 5 is used.
As shown in FIGS. 1 and 2, when the door is closed, that is, when the external operating member such as the handle is not touched by the hand, the engaging piece 30 of the latch block 3 at the protruding position is , The latch block 3 is selectively restrained on one side (first angular position) of the inversion.

That is, in the state shown in FIG. 2, even if the door is pushed or pulled in the direction of arrow A, the stop piece 50 occupies the position where the stop piece 50 abuts on the engaging piece 30 which is about to rotate together with the latch block 3. Therefore, the latch block 3 cannot be inverted, and the locked state with respect to the strike 2 is held.

In the illustrated example, the engaging piece 30, the sliding member 5, the stopping piece 50, and the return spring 8 are all provided in a pair to facilitate the operation, but each of these members is provided. It is not always necessary to provide a plurality of, but only one is required for each.

[0038]

According to the inversion latch mechanism of the lock of the present invention described above, the sliding member having the stop piece, which is the main part of the operating mechanism for selectively restraining the engaging piece of the latch block. By linearly displacing back and forth, it is possible to restrain the inversion of the latch block and release the constraint, so the overall structure is extremely simple, manufacturing is extremely easy, and locking and unlocking operations are also possible. It has the effect of being extremely smooth.

In particular, the fact that the pivoting portion of the actuating mechanism is remarkably reduced is extremely advantageous for cost reduction in manufacturing and assembling parts.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of an inversion latch mechanism of a lock according to the present invention.

2 is a vertical partial plan view taken along line II-II of FIG.

FIG. 3 is a vertical sectional side view thereof.

4 is a partial rear view showing the arrangement relationship of a pair of sliding members in the reversing latch mechanism of FIG.

FIG. 5 is an explanatory view showing a first stage in a displacement state of the latch block in the process of opening the door. However, in this figure and the following figures (FIGS. 6 to 11), the springs attached to the latch blocks are omitted for simplification in all the figures.

FIG. 6 is an explanatory view showing the second stage.

FIG. 7 is an explanatory diagram showing a third step thereof.

FIG. 8 is an explanatory diagram showing a fourth step thereof.

FIG. 9 is an explanatory diagram showing a fifth step thereof.

FIG. 10 is an explanatory view showing a first stage in a displacement state of the latch block in the closing process of the door.

FIG. 11 is an explanatory diagram showing the second stage.

[Explanation of symbols]

 1 Lock Box 11 Front Plate 12 Opening 13 Guide Frame 2 Strike 3 Latch Block 30 Engaging Piece 4 Spring 5 Sliding Member 50 Stopping Piece 7 Linking Member 8 Return Spring

Claims (1)

[Claims] 1. A latch block composed of a columnar body having a substantially rhombic plan shape is slidably and reversibly mounted in a lock box, and a front half portion of the latch block is retractable through an opening of a front plate of the lock box. There is at least one spring provided in the lock box for urging the latch block to slide forward and urge it to rotate in one direction; Providing an engaging piece at the end; Providing a sliding member in the lock box that can be directly displaced back and forth through an interlocking member by an external operating member of the door; And a stop piece for selectively restraining the engagement piece of the latch block to one side of the inversion of the latch block in a state where the door is closed in a normal state. Provided that Inversion latch mechanism for lock.