JP2002220951A - Latch operation regulator for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a latch operation regulator for a door which can improve the operability of the door. SOLUTION: The latch operation regulator is comprised of a fixed plate 2 to be fixed to a door frame 1, and, a slide plate 6 which is freely movable to the fixed plate 2 and movable between a closure position closing a strike opening 5 to which a latch 4 of the door 3 is locked and an open position opening the strike opening 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for restricting latch operation of a door.

[0002]

2. Description of the Related Art Generally, a door is provided with a latch which is urged in a protruding direction from an open end surface of a door body. The latch is resiliently locked in a latch locking recess (strike opening) formed on the door frame side when the door is closed, thereby restricting free opening of the door body.

[0003]

However, in the case of the above door, for example, when both hands are closed and the knob for releasing the latch cannot be operated, it is necessary to once open the knob on the floor with luggage or the like. In addition, there is a problem that the operation of opening and closing the door is troublesome, and the operation is difficult for a person with a disability.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks. The operability of a door is improved by closing a strike opening when necessary so that the latch can be restricted from entering the strike opening. It is an object of the present invention to provide a door door latch operation restricting device capable of improving the door operation.

[0005]

According to the present invention, the above object is achieved by a fixing plate 2 fixed to a door frame 1 and a latch 4 of a door 3 which is movable with respect to the fixing plate 2 and latches. This is achieved by providing a door door latch operation restricting device having a slide plate 6 movable between a closed position for closing the strike opening 5 and an open position for opening the strike opening 5.

The latch operation restricting device can open and close the strike opening 5 into which the latch 4 enters and locks by operating the slide plate 6. The strike opening 5 is closed by the slide plate 6. If maintained, the latch 4 cannot enter and lock into the strike opening 5, the door door 3 can be opened only by pushing or pulling, and the strike opening 5
Can be used as a normal door 3 if stopped at the open position.

If the slide plate 6 is provided with a small projection 7 to which the tip of the latch 4 is locked, the tip of the latch 4 pressed against the slide plate 6 at the closed position is locked to the small projection 7. In addition, the door body is not left open, and can be easily opened only by applying a small load.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the latch operation restricting device comprises a fixed plate 2 and a slide plate 6. The fixing plate 2 and the slide plate 6 are formed of, for example, a stainless steel plate, and the fixing plate 2 has a screw insertion hole 2 a for fixing to the door frame 1.
Is provided. The screw insertion hole 2 a is formed in a counterbore hole shape by Burleigh processing, and accommodates a head 8 a of a fixing screw 8 fixed to the door frame 1. A stopper boss 2b is stamped on the front surface side of the center of the fixed plate 2.

The slide plate 6 has a plate thickness that can be easily elastically deformed, for example, a plate thickness of about 0.3 to 0.4 mm, and is a guide bent portion formed by bending both side edges of the fixed plate 2. The left and right sides are guided by 2c and are held movably in the vertical direction. The lower end edge of the slide plate 6 is bent to the rear surface side to form a stopper piece 6a. Further, at the center of the slide plate 6, the stopper piece 6a is located on the fixed plate 2 side at a position along the lower end of the fixed plate 2. A stopper receiving recess 6b into which the stopper boss 2b fits is formed. Further, small protrusions 7, 7,... Are formed at both sides of the slide plate 6 at appropriate intervals toward the surface direction, and a predetermined number of dummy holes 9 are provided in the center. As shown in FIG. 2, by punching the peripheral edge of the dummy hole 9 from the rear surface side to the front surface side, a projection 9a for operation is formed on the peripheral edge of the dummy hole 9 toward the front surface.

The latch operation restricting device constructed as described above is mounted on the door frame 1 by first fixing the fixing plate 2 to the door frame 1 and then mounting the slide plate 6 on the fixing plate 2. be able to. The fixing of the fixing plate 2 is performed as shown in FIG.
The fixing screw 8 for fixing the fixing screw 8 to the door frame 1 is once removed, the screw insertion hole 2a of the fixing plate 2 is overlapped with the screw insertion hole 10a of the striker plate 10, and the fixing screw 8 is tightened again. Is As described above, since the screw insertion hole 2a of the fixing plate 2 is formed in the shape of a counterbore, when the fixing screw 8 is tightened, as shown in FIG.
Are accommodated in the screw insertion holes 2a of the fixing plate 2 and do not protrude outside. The mounting of the slide plate 6
This can be performed by inserting the slide plate 6 from the lower end opening portion of the guide bending portion 2c of the fixed plate 2 with the stopper piece 6a facing downward and facing the rear surface, that is, the fixed plate 2 side. Interference between the stopper piece 6a and the door frame 1 during the mounting operation of the slide plate 6 can be avoided by bending the slide plate 6.

When the slide plate 6 is attached to the door frame 1, the upper stroke end position (open position) where the stopper boss 2b fits into the stopper receiving recess 6b shown in FIG. 3 and the stopper piece 6a shown in FIG. Can be slid between a lower stroke end position (closed position) where the lower end of the striker plate 10 contacts the lower end edge of the strike opening 5. At the open position of the slide plate 6, the strike opening 5 is open, and when the door 3 is closed, the latch 4 urged in the pop-out direction by an urging means (not shown) enters the strike opening 5 and is closed. After being locked in the strike opening 5, the opening of the door 3 is prevented.

On the other hand, as shown in FIG. 4, when the slide plate 6 is moved to the closing position, the strike opening 5 is closed by the slide plate 6, and thereafter, the latch 4 enters into the strike opening 5. Cannot be performed, and the door 3 can be easily opened without operating a knob (not shown). In addition, the protrusion 9a formed on the surface of the slide plate 6 functions as a non-slip when the slide plate 6 is operated, and improves the operational feeling.

Further, as shown in FIG. 2A, at the closed position, the tip of the latch 4 presses the surface of the slide plate 6 by the above-mentioned biasing force. Engage with the small projection 7.
The latch-facing surface 7a of the small projection 7 is an inclined surface whose height gradually increases in the direction of arrow A in FIG. 2A, that is, toward the opening-side edge of the door 3. 3 generates a component force in the latch 4 immersion direction from the opening operation force on the latch 3. As a result, the door 3 can be opened only when an operation force sufficient to immerse the latch 4 against the urging force on the latch 4 is applied, and the door 3 is opened carelessly. It will not be left open or open.

In this embodiment, the small projection 7
Are formed on both sides of the slide plate 6 so as to be able to cope with the difference of the door 3. Also, the latch facing surface 7
The inclination angle θ or the protruding height of “a” is appropriately determined in consideration of the required operating force on the door 3 as described above.

[0015]

As is apparent from the above description, according to the present invention, when necessary, the strike opening can be closed to restrict the latch from entering the strike opening, so that the operability of the door is improved. Can be improved.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams showing the present invention, wherein FIG. 1A is a front view, and FIG. 1B is an enlarged sectional view taken along line 1B-1B of FIG.

FIGS. 2A and 2B are cross-sectional views of FIG. 1, wherein FIG.
FIG. 2B is a sectional view taken along line 2A, and FIG. 2B is an enlarged view of a portion 2B in FIG. 2A.

FIGS. 3A and 3B are views showing a use state of the present invention, and FIG.
(B) is a front view.

FIGS. 4A and 4B are views showing a use state of the present invention in a closed state, in which FIG. 4A is a side view and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door frame 2 Fixing plate 3 Door 4 Latch 5 Strike opening 6 Slide plate 7 Small protrusion

Claims (2)

[Claims] 1. A fixing plate fixed to a door frame, between a closing position for closing a strike opening which is movable with respect to the fixing plate and latches a door door latch, and an opening position for opening the strike opening. A latch operation restricting device for a door having a slide plate movable with a door. 2. The device according to claim 1, wherein the slide plate is provided with a small protrusion which is engaged with a tip of the latch.