JP2584669Y2 - Latch strike - 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 strike which is provided on a frame of a door and in which a door latch bolt is disengaged.

[0002]

2. Description of the Related Art A front having a latch insertion hole is provided on a front surface of a strike attached to a frame of a door, and a latch bolt projecting from an end face of the door when the door is closed is engaged with the latch insertion hole. And is kept in the closed state. When the door handle is rotated to retract the latch bolt, the door is opened.

[0003] The gap between the side pillar of the door and the end face of the door is not constant, and furthermore, due to errors in the mounting position of the latch lock with respect to the door and overall errors such as distortion generated in the door, the gap between the latch bolt and the latch insertion hole is reduced. There is a problem that a gap is formed between the doors and the gap causes rattling of the door. In order to prevent the backlash of the door, a strike for a latch in which the width of the latch insertion hole can be adjusted has been proposed (Japanese Utility Model Publication No. 58-34200, Japanese Unexamined Patent Publication No. 4-216).
784).

[0004]

[Problem to be solved by the present invention]
The “latch receiving device” described in Japanese Patent Publication No. 0-104115 has a front opening between a box buried in a frame side pillar and a front (named as a latch receiving fixing plate in the publication) attached to the surface of the box. After slidably inserting the adjustable latch stopper plate and adjusting the position of the latch stopper plate, the clamping force of the screw clamps the latch stopper plate between the front and the box. However, there is a disadvantage that the position of the latch stopper plate tends to be misaligned due to the impact of opening and closing the door.

[0005] Since the position tends to be deviated by the friction of the clamping force, a receiving member is provided between the front and the box so as to be movable between the front and the box in the "lock receiving seat" described in JP-A-4-216784. Was adjusted with a screw. In this technique, as shown in FIG. 5, a receiving member 2 smaller than the box 1 and a V-shaped driving plate 3 are inserted into a box 1 having an open front surface (the upper surface in FIG. 5). 3 is inserted into the left gap between the box 1 and the receiving member 2, the spring 4 is inserted into the right gap, and a through hole 5 is provided in the push plate 3b on the other side of the drive plate 3. The tip of the adjusting screw 6 inserted into the through hole 5 was screwed into a screw hole provided in the box 1.

When the driver touching the head of the adjusting screw 6 is turned by hand, the driving plate 3 rotates clockwise about the V-shaped bending point, and the receiving member 2 moves rightward to move the front ( (Not shown) can be narrowed.
Although the head of the adjusting screw 6 has the advantage of being located at a position where it can be easily turned, this technique has the following problems. (1) The number of components is large and the structure is complicated, so that the product cost is high. (2) Since the lower surface of the head of the adjusting screw 6 comes into point contact with the inclined pressing piece 3b, the adjusting screw 6 which always receives the pressure of the spring 4 is easily bent, and the adjusting screw 6 does not gradually turn smoothly.
There are drawbacks such as. The purpose of the present invention is to solve such a problem, the structure is simple, the manufacturing cost is low,
An object of the present invention is to provide a latch strike excellent in durability and free from aging deterioration.

[0007]

In order to achieve the above object, the present invention relates to a latch strike provided on a frame of a door and having a latch bolt projecting from an end face of the door. A strike box buried in a frame-side pillar, having a front face having a latch insertion hole on the front face, and having a screw portion rotatably fitted to a rear wall, and a bottom wall screwed to the screw portion. A push plate having a slanted long hole in a side wall erected from the bottom wall, and a slide pin slidably provided parallel to the front surface, having a slide pin loosely fitted in the obliquely long hole. And the push plate can be moved back and forth in the front direction by the turning operation of the screw portion.

[0008]

With the latch strike configured as described above, when the screw portion is manually turned by a driver or the like, the push plate having the bottom wall screwed to the screw portion advances and retreats in the front direction. A slide plate having a slide pin that fits loosely into the long hole slides parallel to the front surface, so that the width of the front latch insertion hole can be adjusted to the width of the latch inserted into the latch insertion hole.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a latch strike, FIG. 2 is a plan view of the latch strike, and FIGS. FIG. 4 is an exploded perspective view illustrating the operation of the latch strike, and FIG. 4 is an exploded perspective view of the latch strike. The strike box 10 buried on the surface of the frame side pillar of the door has end walls 10b, 10b erected on both short sides of a rectangular rear wall 10a,
Side walls 10c and 10c 'are erected on both long sides, and are formed in a box shape having an open front surface (the upper surface in FIGS. 1 and 4).

One side wall 10c 'of the side walls 10c is
It is slightly lower than the other side wall so that a front wall 26 of the slide plate 23 described later can be inserted therethrough. A fixing piece 11 is provided at the front edge of both end walls 10a.
1 is provided with a mounting hole 12. A bulging portion 13 bulging outward is formed on the rear wall 1a (see FIG. 1), a hole 14 is provided in the bulging portion 13, and the hole 14 has a screw portion 15 having a head portion 15a. After the shaft 15b (see the chain line in FIG. 1) provided at the end is inserted and the flat washer 16 is inserted through the shaft 15b, the tip of the shaft 15b is plastically deformed into the wide flange 17 by caulking. (See the solid line in FIG. 1). Therefore, the screw portion 15 is rotatably provided upright on the rear wall 1a.

The front 18 attached to the front of the strike box 10 has an inclined surface 1 at one end of a flat plate.
A rectangular latch insertion hole 20 is provided substantially at the center, and a guide hole 21 extends from the latch insertion hole 20 in the direction of the inclined surface 19. At both sides of the latch insertion hole 20, mounting holes 22 overlapping the mounting holes 12 of the strike box 10 are provided.

The slide plate 23 inserted into the strike box 10 is bent and extended at a right angle from both ends in the longitudinal direction of the connection wall 24, and has end walls 25 facing each other.
The front 1 is bent at a right angle from the widthwise end of the connecting wall 24.
8 has a front wall 26 that slides on the inner surface of the front projection 8.
7 is formed by cutting and raising.

The shaft of the slide pin 28 is fitted in a hole provided in the end wall 25, and the head of the slide pin 28 projects from the inner surface of the end wall 25. The push plate 29 inserted between the both end walls 25 has a bent wall 31 which is bent at a right angle from the bottom wall 30, and a side wall 32 sliding on the inner surface of the end wall 25 is bent and extended at both ends of the bent wall 31. A screw hole 33 provided in the screw 30 is screwed into the screw portion 15, and the head of the slide pin 28 is loosely fitted in the oblique long hole 34 provided in the side wall 32.

A sliding piece 35 protruding from the edge of the side wall 32 and bending outward is formed on the side wall 10 of the strike box 10.
c is inserted through long holes 36 provided at both ends. Therefore, the push plate 29 can move forward and backward toward the front 18 while being guided by the long holes 36. Next, the operation of the latch strike configured as described above will be described with reference to FIGS.
This will be described with reference to FIGS. 2 and 3A and 3B.

The latch strike assembled as shown in FIGS. 1 and 2 is fitted into a recess (not shown) provided in the frame side column, and the front 18 and the fixing piece 11 of the strike box 10 are attached. It is fixed to the end face of the frame-side column by screws inserted into the holes 12 and 22. When the door (not shown) is closed, the tip of a latch bolt (not shown) projecting from the door end surface hits the inclined surface 19, slides on the surface of the front 18 and fits into the latch insertion hole 20 when the door is closed.

In order to prevent the rattling of the latch bolt,
When the screw portion 15 is manually turned with a screwdriver or the like and the push plate 29 having the bottom wall 30 screwed to the screw portion 15 is moved toward the rear wall 10a of the strike box 10,
Slide plate 23 having slide pins 28 that fit loosely into oblique long holes 34 in side walls 32 of push plate 29
Slides parallel to the inner surface of the front 18 while being guided by the sliding protrusions 27.

The movement of the slide plate 23 causes FIG.
Latch insert width D ₁ shown in (A) and narrows, 3
Will latch insertion width D ₂ as shown in (B) Thus, the screw portion 1
5 cranked by the latch insert width D ₂ of easily adjusting can be eliminated backlash of latch. Once the latch insertion width D ₂ which is adjusted, it does not vary even under impact during closing of the door. Further, since the bending moment does not act on the screw portion 15 unlike the conventional example, there is no possibility that the screw portion 15 is deformed.

[0018]

[Effects of the Invention] The present invention is configured as described above, and has the following effects. (1) The latch strike of the present invention has a simple structure and a small number of components, and thus has the advantage of reducing the product cost. (2) With the latch strike of the present invention, the screw portion can be easily turned by hand, and the latch accommodation width once adjusted does not change even if it receives the impact of the door closing. Also, since no excessive load is applied to the components, the durability is excellent.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a latch strike.

FIG. 2 is a plan view of a latch strike.

FIGS. 3A and 3B are perspective views illustrating the operation of a latch strike.

FIG. 4 is an exploded perspective view of a latch strike.

FIG. 5 is a longitudinal sectional view showing a conventional example of a latch strike.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Strike box 10a Rear wall 15 Screw part 18 Front 20 Latch insertion hole 23 Slide plate 28 Slide pin 29 Push plate 30 Bottom wall 32 Side wall 34 Oblique long hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A latch strike provided on a frame of a door and engaging a latch bolt projecting from an end surface of the door, wherein the front is buried in the frame of the door and has a latch insertion hole on a front surface. A strike box having a screw portion rotatably fitted to the rear wall, a bottom wall screwed to the screw portion, and a slanted oblong hole in a side wall standing upright from the bottom wall. And a slide plate having a slide pin loosely fitted in the obliquely long hole and slidably provided in parallel with the front surface. The push operation is performed by rotating the screw portion. A strike for latching, wherein the plate can be moved forward and backward in the front direction.