JP2598118Y2 - Latch lock - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch lock, and more particularly to a lock which is generally called a push-pull type and which releases a latch from being prevented from being inverted by operating a push lever and a pull lever. The present invention relates to a latch lock in which the upper end of a lever is opened and closed by a lever of a fixed type.

[0002]

2. Description of the Related Art As members for opening and closing a latch lock, there are:
Traditionally, rotary levers and grip balls were widely used. But,
Since the rotating lever and the grip ball protrude greatly from the door surface, the width of the corridor becomes narrow, and there is a problem that clothes are caught. In addition, a rotating lever or a grip ball applies a force for pushing or pulling the door during the rotation, so that there is a problem that two operations are performed and the door cannot be quickly opened.

For this reason, in recent years, a configuration in which a door is opened by pushing or pulling a push-pull type lever whose upper end is rotatably fixed, instead of a conventional rotary lever or grip ball, has become widespread.

When a door is opened by a push-pull lever, for example, when the door is opened from a push-open side, a user pushes the lever and tilts the lever toward the door.
Then apply the force and push the door open. Conversely, from the pull-out side, the user pulls the lever and tilts the lever toward the user. Further, the lever is strongly pulled to open the door.

[0005]

As described above, the latch lock employing the push-pull type lever can open the door by only one operation. However, in a latch lock employing a push-pull lever, the mechanism of the lever and the mechanism for releasing the latch are inevitably complicated.
There was a drawback that the number of parts was large.

That is, in a push-pull lever,
When the user pushes or pulls the lever, a member such as a fork integrally fixed to the lever swings up and down, and the operation of the member such as the fork releases the fixing of the latch.

However, in the push-pull type lever, since the door is opened by tilting the lever toward the opening direction of the door, the pushing and pulling directions are reversed between inside and outside of the door. For example, when the door is opened from the room, if the lever in the room is of the push type, the lever on the corridor side is of the pull type. Therefore, the operations of the members such as forks fixed to the two levers sandwiching the door when opening the door are completely opposite to each other.

Conventionally, therefore, it has been necessary to provide a mechanism for changing the direction of operation so that a member such as a fork finally moves in the same direction regardless of which lever is pushed or pulled. However, the space between the lever and the main body of the latch lock is narrow, and the mechanism for changing the direction of operation described above must be of a complicated configuration, not only increasing the number of parts but also assembling. Also had the disadvantage of requiring much time and effort.

[0009] These disadvantages can be solved by pushing or pulling.
Provide a mechanism for changing the operating direction of the fork or the like on the lever
As a latch lock that does not need to be used, for example, Japanese Utility Model Laid-Open No. 60-6
No. 8164 is disclosed. Such conventional racks
The lock has a latch provided in the lock case so that it can
The spring that urges the switch to the left and right, and the latch can be turned over
Hold latch guide and prevent latch from reversing
A pair of upper and lower reversing stoppers that engage the grooves provided above and below the latch.
A stop member, and the reversal prevention member is attached to the door.
Lever contact part that contacts the fork of the push-pull lever
With push-pull lever operation.
Lever abutment is pushed by a fork to prevent the latch from reversing.
Is attached to the lock case so that it can
Things. However, in such conventional latch locks,
When the switch protrudes into and out of the lock case,
The reversing prevention member is engaged with the upper and lower grooves of the latch.
Therefore, catching occurs at the engaging portion, and
The immersion operation may not be performed smoothly. Therefore, the present invention
The push-pull lever with the latch
In the case of a latch lock that is reversed by operation, the latch
The purpose is to ensure the smoothness of the submersion
You.

[0010]

Means for solving the problems The features of the present invention for achieving the above object include a latch,
Direction and a latch that holds the latch reversibly.
Latch guide and latch to prevent the latch from reversing.
And a reverse blocking member to be engaged.
Contact the fork of the push-pull lever attached to the
The lever has a lever
Lever abutment is pushed by a fork to prevent the latch from reversing.
The latch lock with which the reversing prevention member swings to release
The spring is indirectly actuated by biasing the latch guide.
Biasing the latch in the projecting direction.
The blocking member is attached to the latch guide, and the lever contact part
Is configured to be placed vertically on the fork.
In the latch lock. The latch is used for the vertical guide pin.
To the latch guide so that it turns around the
An engagement portion with the reversal prevention member is provided at the rear end of the latch.
May be provided. Also latch
An auxiliary lever member linked to the guide and interlocking with the reversal prevention member
Swingably attached to the auxiliary lever member and attached to the door.
Lever that contacts the fork of the attached push-pull lever
A contact portion, and the lever contact portion is provided with a lever of a reversal prevention member.
-The lever abutment part is vertically opposed to the abutment part.
Make sure that the push-pull lever fork is
Can be achieved.

[0011]

According to the latch lock of the present invention, the spring is urged by the spring.
Since the reversal prevention member is attached to the latch guide that is
When the latch moves in and out, the latch and latch
The reversing prevention member is also moved together with the id. I
Therefore, when the latch comes and goes, the reversal prevention member is pulled.
The latch does not hinder the movement of the latch,
Latch operation that operates in two modes: in / out operation and inversion operation
The smoothness of the submersion operation can be ensured. In addition, the latch guide
After attaching the latch and the reversing prevention member, the latch
By attaching the id to the lock case via a spring,
Easy to assemble.

Also, the latch is provided with a vertical guide pin.
Attached to the latch guide so that it is inverted as the center,
At the rear end of the latch, provide an engagement portion with the reversal prevention member.
External force acting on the latch in the direction to flip the latch.
When used, the latch can be prevented from swaying.
Also, the latch guide is interlocked with the reversal prevention member.
An auxiliary lever member is swingably attached to the auxiliary lever member.
The material includes a push-pull lever attached to the door.
A lever contact portion for contacting the lever,
It is arranged vertically opposite to the lever contact part of the reversing prevention member.
Between the lever abutment and the push-pull lever.
Parts are located so that fewer parts
The number of points changes the fork movement direction of the push-pull lever.
A latch lock that does not need to be provided with
Cost can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below. FIG. 1 is a front view of a latch lock according to a specific embodiment of the present invention, showing a state in which the latch is fixed. FIG. 2 is a front view in a state where the latch of the latch lock of FIG. 1 is released. FIG. 3 is a plan view of the latch lock of FIG. FIG.
FIG. 2 is an exploded perspective view of a main part of the latch lock of FIG. FIG.
It is sectional drawing of a push-pull type lever.

In each of the figures, reference numeral 1 denotes a latch lock according to a specific embodiment of the present invention. The latch lock 1 of the present invention includes a latch 3, a latch guide 4, and a main lever member 5 (latch) in a lock case 2.
H) , an auxiliary lever member 6, a spring 7, and a spring 8 are provided.

If the shape of each member is explained first, the lock case 2 is not much different from the known case, and is a steel box having a mounting flange 10 for mounting to the door. A through-hole 11 is provided at the front of the lock case 2 so that the tip of the latch 3 protrudes. Further, a rectangular fork insertion hole 13 is provided on the side surface of the lock case 2, that is, the portion facing the room and the hallway when attached to the door.
Is provided.

The latch 3 is made of metal, and has a tip surface on one side of which is an inclined cam surface 14 and an opposite surface is a vertical surface 15. Further, a step-shaped engaging portion 16 is formed on the rear end side of the latch 3. The latch 3 is provided with two holes penetrating in the vertical direction when attached to the door.
7 and 18 are inserted, and the tips of the guide pins 17 and 18 project from the upper and lower surfaces of the latch 3.

The latch guide 4 is formed by bending a single plate, and includes a back plate portion 20, two side plate portions 21 bent perpendicularly to the back plate portion 20, and a side plate. One end of the portion 21 has a spring abutting portion 22 that is folded open. The end of the spring abutting portion 22 is further vertically folded to provide a lever receiving portion 25. The side plate portion 21 is provided with one round hole 26 and a long hole 27 formed in an arc shape around the round hole 26. The spring contact portion 22 is provided with a projecting spring guide 30. The lever receiving portion 25 is provided with a hole 31.

The main lever member 5 has two curved portions as viewed from the front, is substantially S-shaped, and has a latch engaging piece 33 formed by bending the front end vertically. Also, the rear end side
The lever contact portion 34 is formed by being folded back to a plane orthogonal to the latch engagement piece 33 described above. Main lever member 5-2
A shaft hole 35 is provided at a position close to the lever contact portion 34 among the curved portions. On the other hand, the curved portion near the latch engagement piece 33 acts as the overlapping portion 36, and a pin 37 is inserted into the overlapped portion and caulked integrally.

The auxiliary lever member 6 is L-shaped when viewed from the front, and has a rear end provided with a lever contact portion 38 having the same shape as the main lever member described above. The curved portion also has a shaft hole 39 similar to the main lever member. The front end of the auxiliary lever member 6 is slightly wider, and the overlapping portion 40 is formed. The overlapping portion 40 is provided with a long hole 41.

Next, the relationship between the members will be described. The latch 3 is inserted into a groove surrounded by the back plate portion 20 and the side plate portion 21 of the latch guide 4, and the guide pin 18 of the latch 3 is connected to the side plate portion. The guide pin 17 is also engaged with the elongated hole 27.

The main lever member 5 and the auxiliary lever member 6 are overlapped with the overlapping portions 36 and 40, respectively, and the pin 37 provided on the main lever member 5 is inserted into the elongated hole 41 provided on the auxiliary lever member 6. Mated. In the main lever member 5 and the auxiliary lever member 6, the shaft holes 35 and 39 provided in the respective bent portions are overlapped with the holes 31 of the latch guide 4 in the above-mentioned fitted state, and the support pin 45 is inserted into both holes. Latch guide 4
, And can swing about the pivot pin 45. A spring 8 is concentrically mounted on the support pin 45. One end of the spring 8 contacts the spring contact portion 22 of the latch guide 4, and the other end of the spring 8 is the main lever member 5 or the auxiliary lever member. 6 is in contact with the lever contact portions 34 and 38,
The lever 8 is pressed by the spring 8 in a direction approaching each other.

The latch 3, the latch guide 4, the main lever member 5, the auxiliary lever member 6, and the spring 8 are arranged in the case 2 in the above-described connection relationship. That is, the latch 3 is at a position where it can protrude from the through window 11. The lever contact portions 34 and 38 of the main lever member 5 and the auxiliary lever member 6 face up and down as viewed from the state of being attached to the door, and are near the fork insertion hole 13. A spring 7 is mounted between the spring guide 30 provided on the spring contact portion 22 of the latch guide 4 and the lock case 2, and the latch guide 4 is pressed toward the through window 11.

Next, the mounting structure of the latch lock 1 of this embodiment to the door will be described. The latch lock 1 according to the present embodiment is attached to the center of the door 51 via an attachment 50. Push-pull levers are attached to the front and rear positions of the latch lock 1. In this embodiment, the indoor lever 52 is of a push type, and the corridor lever 53 is of a pull type. Each of the levers 52 and 53 has an operation plate 54 pushed or pulled by the user, and forks 55 and 56 are vertically and integrally attached to the operation plate 54. Each of the levers 52 and 53 has its upper end on the back surface of the operation plate 54 fixed to the shaft, and the levers 52 and 53 swing about a shaft 58. Also, lever 5 is provided by a stopper (not shown).
Both 2 and 53 fall only toward the corridor side.

Then, the forks 55 of the levers 52, 53,
56 is inserted into the lock case 2 from the long hole 13 of the lock case 2 as shown by a two-dot chain line in FIG. 1 and is disposed between the lever contact portions 34 and 38 of the main lever member 5 and the auxiliary lever member 6. Have been.

Next, the operation of the latch lock 1 of this embodiment will be described. In the normal state, that is, when the user
When not operating 2, 53, the main lever member 5 and
The auxiliary lever member 6 is pressed by the spring 8 mounted on the pivot pin 45 in a direction in which the lever contact portions 34 and 38 approach each other, and the latch engagement piece 33 of the main lever member 5 is
Are engaged with the engaging portions 16. Therefore, the inversion of the latch 3 is prevented. Since the latch guide 4 is pressed by the spring 7 in the direction of the penetrating window 11, the tip of the latch 3 projects from the penetrating window 11.

When the door 51 is closed, the inclined cam surface 14 of the latch 3 comes into contact with a groove of a fixed door (not shown) or the like, and the latch 3 is pushed down by the action of the inclined cam surface 14 without being inverted. Immerse in the lock case 2 as it is.

Next, when the user presses the operation plate 54 of the lever 52 on the indoor side, the lever 52 swings about the shaft 58 and falls down. The fork 5 fixed integrally with the operation plate 54
5 rises up. As the fork 55 rises, the lever contact portion 34 of the main lever member 5 is pushed upward.
Then, the main lever member 5 swings counterclockwise about the pivot pin 45, and the latch engagement piece 33 is lowered rearward. As a result, the latch engagement piece 33 leaves the engagement portion 16 of the latch 3 and
The latch 3 is released from being fixed.

Here, when the user pushes the operation plate 54 more strongly, the latch 3 is turned around the guide pin 18 and the door 51 is opened.

Next, a case where the door 51 is opened from the corridor side will be described. When the user pulls the operation plate 54 on the corridor side, the fork 56 lowers in the opposite direction to the above case. Then, as the fork 56 is lowered, the lever contact portion 38 of the auxiliary lever member 6 is pushed down. The auxiliary lever member 6 swings clockwise about the pivot pin 45, and the overlapping portion 40 at the tip lowers backward. However, since the overlapping portion 40 of the auxiliary lever member 6 has the elongated hole 41 and the pin 37 fitted together, the overlapping portion 40 of the auxiliary lever member 6 moves backward as the overlapping portion 40 of the auxiliary lever member 6 moves backward. The part 36 also moves rearward, and the latch engagement piece 33 of the main lever member 5 also lowers rearward. As a result, the latch engagement piece 33 is
, The latch 3 is released, and when the user pulls the operation plate 54 more strongly, the door 51 is opened.

[0030]

According to the latch lock of the present invention , the spring
Reverse blocking member is attached to the latch guide that is biased
Therefore, when the latch moves in and out,
The reversing prevention member moves together with the switch guide.
When the latch moves in and out, the reversal prevention member is caught.
Movement of the latch without disturbing the movement of the latch
Operation of the latch which operates in two modes of operation and inversion operation
Smoothness and the latch guide
After attaching the latch and the reversing prevention member to the latch,
The lock guide to the lock case via a spring.
And can be easily assembled.

[Brief description of the drawings]

FIG. 1 is a front view of a latch lock according to a specific embodiment of the present invention, showing a state where a latch is fixed.

FIG. 2 is a front view of the latch lock of FIG. 1 in a state where a latch is released.

FIG. 3 is a plan view of the latch lock of FIG. 1;

FIG. 4 is an exploded perspective view of a main part of the latch lock of FIG. 1;

FIG. 5 is a sectional view of a push-pull lever.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Latch lock 2 Lock case 3 Latch 4 Latch guide 5 Main lever member (reversal prevention member) 6 Auxiliary lever member 7 Spring 33 for urging a latch in a protruding direction 33 Latch engagement piece 34 Lever contact portion of reversal prevention member 38 Lever Four push the lever contact portion of the contact portion 36 overlapping portion 40 overlapping portion 45 pivot pin 51 doors 52 and 53 push-pull lever 55 inversion preventing member
K

Claims (3)

(57) [Scope of request for utility model registration] 1. A latch and biasing the latch in a front-rear direction.
A spring, a latch guide for holding the latch reversibly,
A reversing block engaging the latch to prevent the latch from reversing
A stop member, and the reversal prevention member is attached to the door.
Lever contact part that contacts the fork of the push-pull lever
The lever abutment part is operated by operating the push-pull lever.
Is pressed by the fork to release the latch from turning over.
In a latch lock in which the reversing prevention member swings, the spring indirectly operates by urging the latch guide.
The latch is urged in the protruding direction, and the reversal prevention is performed.
The member is attached to the latch guide, and the lever abutment is
Configuration so that they are
And a latch lock. 2. The latch is centered on a vertical guide pin.
Attached to the latch guide to be inverted,
At the rear end of the latch, an engagement portion with the reversal prevention member is provided.
2. The latch lock according to claim 1, wherein: 3. An interlocking connection with a latch guide and an inversion prevention member.
An auxiliary lever member to be connected is swingably attached to the auxiliary lever member.
A push-pull lever attached to the door
Lever contact portion for contacting the fork of
The contact part vertically opposes the lever contact part of the reversal prevention member
The push-pull lever is located between these lever contact parts
The fork is configured to be located
The latch lock according to claim 1 or 2, wherein