JP2826964B2 - Door latch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door latch which is provided, for example, on a folding door of a bathroom and holds the folding door in a closed state.

[0002]

2. Description of the Related Art Conventionally, a door latch of this type is disclosed in Japanese Utility Model Laid-Open Publication No. 61-197170. The latch is attached to a door of a folding door, and is configured to be hooked and removed from a rail formed on a frame of the folding door as the door is opened and closed. The latch is composed of a latch case having an opening formed on the end face on the frame side, a latch body housed in the latch case such that the head portion protrudes and retracts from the opening, and a coil spring for urging the latch body in a protruding direction. ,It is configured. On the latch body, a rubber ring for shock absorption is attached to the step between the head and the body, and when latching / releasing operation,
When the head portion is moved from the retracted state to the protruded state by the coil spring, the rubber ring hits the retaining portion of the latch case and absorbs the shock, thereby suppressing generation of unpleasant sound from the latch. .

[0003]

However, the unpleasant sound generated when the latch is hooked / unfastened is not generated when the head portion protrudes and the body portion hits the retaining portion of the latch case, but is caught on the rail. The tilted latch body
When it comes off the rail, it occurs when it hits the guide wall connected to the opening. That is, the movement in the front-rear direction with respect to the tilt direction of the latch body, rather than the vertical movement of the latch body, is a main source of unpleasant sound. In this type of latch, a clearance is provided between the guide wall of the latch case and the head portion due to manufacturing problems and a problem that the latch slides, and there is play between members based on the clearance. Is considered to be the cause of the unpleasant sound. Therefore, even if a rubber ring is used, generation of unpleasant and unpleasant sounds cannot be sufficiently suppressed.

[0004] It is an object of the present invention to provide a door latch capable of sufficiently suppressing the generation of unpleasant noise with a simple structure without causing any trouble in assembly.

[0005]

According to a first aspect of the present invention, there is provided a latch case, a latch body housed in the latch case, and a biasing means for biasing the latch body in a protruding direction. In the case of a door latch in which a latching / unmoving operation is performed by a head portion of a latch body biased by a biasing means protruding and retracting from a retractable opening formed in a latch case, a prospect of a latch case connected to a retractable opening is considered.
And a pair of guide walls formed on both sides
A pair of sliding contact portions formed on the latch body while being in sliding contact with each other.
And a pair of presses for pressing each guide wall against each sliding contact portion.
It is characterized in that the pieces are formed integrally . Also,
The invention according to claim 2 includes a latch case, a latch main body housed in the latch case, and urging means for urging the latch main body in a protruding direction, wherein a head portion of the latch main body urged by the urging means is provided. In a door latch in which a latching / unmoving operation is performed by protruding and retracting from a retracting opening formed in a latch case, the latch body slides on the latch case to guide the protruding and retracting of the head portion, and is slightly eccentric at an intermediate portion. 2. The invention according to claim 1, wherein the latch body has a shaft portion, and the biasing means comprises a spring wound around the shaft portion. It is preferable to have a shaft part that guides the emergence of the shaft and is slightly eccentric at the middle part, and that the urging means is formed of a spring wound around the shaft part. Further, in the invention of claim 2 or 3, it is preferable that the shaft portion is in sliding contact with a guide hole formed in the latch case, and the shaft portion is preferably formed with a slit extending in the axial direction.

[0006]

A pair of pressing pieces for pressing the other are provided on one of the guide wall in the expected direction of the latch case connected to the projecting opening and the sliding contact portion of the latch body sliding on the guide wall. When the latch body is incorporated into the latch body, the pressing piece acts to fill the clearance between the guide wall of the latch case and the sliding portion of the latch body. Therefore, rattling of the latch body is prevented.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a door latch according to an embodiment of the present invention; As shown in the front view of FIG. 1 and the vertical sectional view of FIG. 2, the folding door 1 is a so-called middle folding door. A door body 2 including a left door 2a and a right door 2b, which are foldably connected, is incorporated in a door frame 3. Each door 2
The horizontal rails 5 are incorporated in the frames 4a and 2b, and a panel body 6 is provided above the frame 4 divided by the horizontal rails 5.
However, the panel body 6 and the rag 7 are incorporated in the lower part.

Rails 8, 8 for guiding the opening and closing of the door body 2 are provided above and below the door frame 3, respectively, and correspondingly, rails 8, 8 are provided above and below the right end of the right door 2b. Is attached to the slider. A pivot (not shown) is installed at the left end of the left door 2a, and latches 10 and 10 which are hooked / unfastened on rails 8 and 8 are installed above and below the assembling frame 9 of the left door 2a. Have been. When the puller 5a of the horizontal rail 5 of the right door 2b is pulled diagonally forward from the closed state, the latch 10 is released from the rail 8, and the left door 2a and the right door 2b are bent while being guided by the rail 8, Finally, right door 2b is attached to left door 2a
Is folded so as to overlap, and the door is opened. Also,
Conversely, when the pulling portion 5a is pulled from the door open state, the left door 2a and the right door 2b are expanded, and finally the latch 10 is hooked on the rail 8, and the door is closed.

Next, referring to FIG. 3 and FIG.
The latches 10 mounted on the upper and lower edges of the assembling frame 9 will be described. Each of the latches 10 includes a latch case 11 that fits into a small edge of the assembling frame 9, a latch body 12 that is housed in the latch case 11 so as to be able to protrude and retract, and a spring 13 that biases the latch body 12. The latch case 11 is provided at the upper and lower parts of the assembling frame 9,
It may be provided on the upper and lower frames. In this case, the closed state of the door body 2 is maintained by locking the head portion 31 of the latch body 12, which is urged by the spring 13 and protrudes from the retractable opening 22 of the latch case 11, to the rail 8. .

A housing portion 21 for housing the latch body 12 is formed inside the latch case 11, and the housing portion 2 is provided.
The ceiling wall 1 has an opening 22 in which the head portion 31 of the latch body 12 projects. Both the front and rear walls with respect to the tilting direction of the latch body 12 of the housing 21
Are formed flush with the front and rear surfaces of the latch body 12, and serve as guide walls 23, 23 for guiding the latch body 12 to come and go. Further, both side walls of the housing portion 21 are completely opened in the tilting direction of the latch body 12, and windows 24, 24 for incorporating the latch body 12 and the spring 13 into the latch case 11 are formed. The upper end surface of each window 24 also serves as a retaining portion 24 a for preventing the latch main body 12 from coming out of the retractable opening 22. Further, a guide hole 25 into which a shaft portion 33 of the latch body 12 described later is slidably inserted is formed in a bottom wall of the housing portion 21. The reference numeral 26 in the figure
Is a latch case 11 formed at the lower part of the latch case.
Is a mounting hole for fixing to the assembling frame 9.

The spring 13 is composed of a coil spring and is wound around the shaft 33 of the latch body 12, with its upper end abutting against a contact portion 32 of the latch body 12, and its lower end abutting against the bottom surface of the latch case 11. In contact therewith, the latch body 12 is urged upward. When the latch body 12 is incorporated into the latch case 11, first, the spring 13 is attached to the shaft 33 of the latch body 12, and the shaft 33 is inserted into the guide hole 25 while pressing the spring 13 from the window 24. ,continue,
The head part 31 is pushed into the latch case 11 so as to pass through the window part 24 while compressing the spring 13, and the head part 31 is protruded from the retractable opening 22 and incorporated.

The latch body 12 has a head portion 31, an abutting portion 32 provided below the head portion 31 in a direction orthogonal to the tilting direction of the latch body 12, and a lower portion of the abutting portion 32. a shaft portion 33 which is provided with a pair of pressing pieces 34 provided from the front and rear end of the head portion 31 to the sliding contact portion 34 which is extended downward
a and 34a are integrally formed. Latch body 12
Are a pair of pressing pieces 34a, 34a and a shaft portion 33, and the guide walls 23, 23 of the latch case 11 and the guide hole 2.
5, while the abutting portion 32 abuts against the retaining portions 24a, 24a of the latch case 11, and the projecting state is regulated against the spring 13.

A projection 34b is formed at the tip of each pressing piece 34 outwardly.
b slides against the latch case 11 so as to be pressed against the guide wall 23 of the latch case 11. That is,
In the front-rear direction, there is a clearance required for assembling between the head portion 31 and the two guide walls (projection openings 22) 23, 23.
2 and the guide walls 23, 23 are held without rattling. As a result, the head portion 31 and the retractable opening 22
The generation of sound based on the play between the guide wall 23 and the guide wall 23 is suppressed.

The head portion 31 has a substantially mountain-shaped cross section.
The upper surface is formed with a flat inclined surface in the front half on the hanging side and a curved inclined surface in the rear half on the detaching side. This ensures that the rail 8 is hooked,
In addition, hanging and removing are performed smoothly. The left and right sides of the abutting portion 32 are provided with the retaining portions 24a, 24a of the latch case 11.
The projections 32a, 32a are in contact with a, and each projection 32a is formed obliquely in the left-right direction with respect to the retaining portion 24a. As a result, the abutting portion 32 urged by the spring 13 and abutting against the retaining portion 24a has:
The component force of the spring 13 acts on the inside of each other, and the position of the head portion 31 is regulated at the center in the left-right direction of the retractable opening 22. That is, in the left-right direction, the head portion 31 and the retreat opening 22
There is a clearance required during assembly between and
Due to the component force of the spring 13, the protruding head portion 31 is held without rattling against the retractable opening 22. This suppresses the generation of sound based on the rattling between the head portion 31 and the retractable opening 22.

The shaft portion 33 extends downward from the lower end surface of the head portion 31, and the tip portion is inserted into the guide hole 25 of the latch case 11. The base end of the shaft portion 33 has a circular cross section and the front end has a semicircular cross section.
The latch body 12 is formed obliquely from the base end to the front end in a direction parallel to the surface direction of the window 24.
The shaft portion 33 of the latch body 12 can be inserted into the guide hole 25 from an obliquely upper side when being incorporated into the housing portion from the one window portion 24. Further, a slit 35 extending in the longitudinal direction is formed in the shaft portion 33, so that the bending of the shaft portion 33 itself can be allowed to some extent.

As described above, since the tip of the shaft 33 is formed in a semicircular cross section and the shaft 33 has flexibility, the shaft 33 can be easily inserted into the guide hole 25. The slit 35 of the shaft 33 allows the shaft 33 itself to be bent and guides the head 31 to move in and out while tilting. In addition, this makes it possible to eliminate the clearance between the shaft portion 33 and the guide hole 25 and suppress the generation of sound due to rattling between the two. Further, the shaft portion 33 is slightly eccentric at the middle portion, and the spring 13 wound around the shaft portion 33 is restricted from moving in the lateral direction at the base end portion, the middle portion, and the front end portion of the shaft portion 33, so that there is no play. It is installed. This allows
It is possible to suppress generation of sound due to rattling between the shaft portion 33 and the spring 13.

As described above, according to the present embodiment, it is possible to prevent the play between the guide wall 23 and the retractable opening 22 and the head portion 31 while maintaining the necessary clearance therebetween. Therefore, both the directly generated sound and the indirectly generated sound due to the shock generated when the latch 10 is hooked / unfastened can be suppressed. Further, by preventing rattling between the guide hole 25 and the shaft portion 33 and between the shaft portion 33 and the spring 13, noise generated can be further suppressed. Therefore, it is possible to effectively prevent an unpleasant latch sound generated when the folding door 1 is opened and closed without impairing the assembling property.

In this embodiment, the middle folding door for the bathroom has been described. However, the present invention can be applied to other folding doors and doors.
Needless to say. Further, the pressing piece may be provided on the guide wall side of the latch case.

[0019]

As described above, according to the door latch of the present invention, the clearance between the guide wall of the latch case and the sliding contact portion of the latch body required for assembly is filled with the pressing piece. Since the parts are not rattled, the unpleasant and unpleasant sound generated when hanging or detaching can be sufficiently suppressed with no trouble in assembly and with a simple structure.

[Brief description of the drawings]

FIG. 1 is a front view of a folding door to which a door latch according to an embodiment of the present invention is applied.

FIG. 2 is a longitudinal sectional view of a folding door to which a door latch according to an embodiment is applied.

FIG. 3 is an enlarged vertical sectional view of a door latch of the embodiment.

FIG. 4 is an exploded perspective view of a door latch according to the embodiment.

[Explanation of symbols]

1 folding door, 2 doors, 3 door frames, 8 rails, 10
Latch, 11 Latch case, 12 Latch body, 13
Spring, 22 Projection opening, 23 Guide wall, 31 Head part, 34 Sliding part, 34a Pressing piece

Claims (4)

(57) [Claims] 1. A latch body, a latch body housed in the latch case, and a biasing means for biasing the latch body in a protruding direction, wherein the head of the latch body biased by the biasing means is provided. The part of the door is latched and unlatched by the part being protruded and retracted from the retractable opening formed in the latch case.
A pair of guide walls formed on the wall and slidingly contacting the guide walls,
A pair of pressing pieces comprising a pair of sliding contact portions formed on the body, and pressing the guide walls against the sliding contact portions.
And a door latch formed integrally with each other. 2. A latch case, and a latch case.
Latch body and bias the latch body in the protruding direction.
And urging means, which is urged by the urging means.
The head of the latch body is formed on the latch case.
Hanging / unmoving action
In the door latch performed, the latch body is
Sliding the latch case to guide the head section
With a slightly eccentric shaft at the middle and
The biasing means is constituted by a spring wound around the shaft.
A door latch characterized by the fact that: 3. The latch body is provided on the latch case.
It slides and guides the head part in and out and at the middle part
Having a slightly eccentric shaft, and wherein the biasing means is
Characterized by being constituted by a spring wound around the shaft portion.
The door latch according to claim 1. 4. The shaft portion is formed on the latch case.
It is in sliding contact with the guide hole, and the shaft extends in the axial direction.
Wherein a slit is formed.
The door latch according to claim 2 or 3.