JPH09125757A - Case of door lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form strongly a door lock case of a press shaped type by outwards folding each front plate mounting piece at the front edge of each side plate of casing, forming a front plate foldedly at the front edge of an upper cover, and joining the front plate with the front surface of the front plate mounting piece. SOLUTION: A casing 10 is formed by press working in a box shape by raising side plates 13, 14 at the four peripheral edges, wherein front plate mounting pieces 16 are foldedly provided as outwards facing at the front edges of the side plates 13, 13 provided on both sides. An upper cover 20 to enclose the oversurface of the casing 10 is furnished at the front edge of the cover with a front plate 26 in such a way as folded downward, and the upper cover 20 is coupled with the casing 10 in its over-part in the condition that the front plate 26 is joined with the surface of each front plate mounting piece 16. Accordingly the front plate 26 is given stiffness in all directions along the X-, Y-, and Z-axes generated by the strong stiffness in the X-direction owing to the mounting pieces 16 formed in double fold through the side plate 13 and the Y-direction and Z-direction stiffnesses of the front plate 26 itself formed by downward folding from the upper cover 20, and the resultant door lock case of press shaped type can be established strongly.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a door lock case.

[0002]

2. Description of the Related Art In a door lock in which a latch is moved in and out by a handle or a grip ball, a case for accommodating the latch mechanism is generally formed by die casting or pressing.

Among them, the product formed by pressing is more excellent in the manufacturing cost than the product formed by die casting, and as shown in FIG. 5, it is usually mounted on the front edge of the housing a. The front plate c is configured to be integrated with the piece b by spot welding. However, in this type of case, when a strength test is performed such that a strong force is applied to the latch, the front plate c is connected via the housing a. Since a strong inward force is applied to the central portion of the front plate c, both longitudinal ends of the front plate c attached to the end face of the door are, as shown by the two-dot chain line,
The inconvenience of easily turning back outward occurs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
Another object of the present invention is to provide a new press-forming door lock case that does not easily deform even when a strong force acts on the case.

[0005]

That is, the present invention provides a case of a door lock for achieving the above-mentioned problems, which is provided on both sides of a box formed by pressing up a side plate on four sides to form a box. The front plate mounting piece is bent outward at each front edge of the side plate, and the front plate is bent downward at the front edge of the cover plate that covers the upper surface of the housing. In the state of being joined to the front surface of the front plate attachment piece, the cover plate is joined and integrated on the housing.

[0006]

Embodiments of the present invention will be described below. FIG. 1 shows an embodiment of the present invention.

In the figure, reference numeral 10 is a housing for accommodating a latch mechanism therein, and the housing 10 integrally formed by a press is an upper cover 2 also formed by a press.
It is combined with 0 to form one door lock case 1.

Next, the details of each of these parts will be described. The housing 10 includes four sides of the bottom plate 11 to the front side plate 12.
By raising both side plates 13 and 13 and the rear side plate 14, they are formed into a shallow box shape having an open upper part, and inside thereof, the latch 5 as shown in FIG. A latch mechanism composed of the operation piece 7 and the like, that is, the applicant of the present invention has disclosed in
It is configured to accommodate the latch mechanism disclosed in Japanese Patent Publication No. 275874.

The housing 10 also includes both side plates 1
Front plate mounting pieces 16 from the front edge of 3, 13 to the left and right,
16 are bent and formed in an L shape, and a front plate 21, which will be described later, is superposed and attached to the front surface of these.

On the other hand, the upper cover 20 is formed as a plate body having a size capable of covering the upper end of the housing 10 described above.
Further, at the front edge thereof, the front plate 2 fixed to the end surface of the door 30
6 is bent downward to form an L shape.

The front plate 26 has a reinforcing portion 17 having a convex cross section.
Are squeezed in the longitudinal direction to reinforce the front plate 26 itself, and by engaging with the reinforcing pieces 17, 17 having a convex cross section provided on the front plate mounting pieces 16, 16, they are joined together without coming off. Is configured.

Reference numeral 15 in the drawing denotes a housing 1 for receiving an engagement piece 25 formed by bending a rear end of the upper cover 20.
0 is a fitting recess formed in the rear side plate 14, and 13a, 15a, and 16a are upper cover 20 respectively.
The engaging protrusions that are caulked to the corresponding engaging recesses 23a, 25a, and 26a are shown. Further, reference numerals 18 and 28 in the drawing are provided on the corresponding portions of the front side plate 12 and the front plate 26, respectively. The latch holes are shown.

The housing 10 and the upper cover 2 configured as described above
To assemble 0, first latch 5 in the housing 10.
, A cam piece 6, and a group of parts such as an operating piece 7 that constitute a latch mechanism are assembled, and the front plate 26 and the rear plate 14 are aligned so that the front plate 26 is joined to the front surface of the front plate mounting piece 16.
The upper cover 20 is joined to the housing 10 by aligning the engaging piece 25 with the fitting concave portion 15 of FIG.

As a result, the front plate 26 and the front plate mounting piece 16 are
Finally, since the respective reinforcing portions 27 and 17 are joined together in a state of being meshed with each other, and the respective engaging projections 13a, 15a and 16a and the engaging concave portions 23a, 25a and 26a are engaged with each other, By caulking these, the housing 10 and the upper cover 20 are combined and integrated.

And finally, the case 1 which is integrated and integrated.
3, is fitted into a mounting hole 31 provided on the end face of the door 30, and then a decorative plate 33 is applied from above to fix the top and bottom with screws 35.

When combined in this manner, the front plate mounting piece 16 is bent in such a manner that the side plate 13 is slightly deformed around the Z axis, and the side plate 13 is also fixed to the bottom plate 1.
Since it is bent in such a state that it is slightly deformed around the Y axis with respect to 1, the front plate mounting piece 16 is
, The front plate 26 bent to the front end edge of the upper plate 21 is mounted with a slight deformation around the X axis. Will be done.

Therefore, when the front plate 26 and the front plate mounting piece 16 are joined and integrated, the front plate 26 becomes
Strong rigidity that is not deformed around the X axis, the Y axis, and the Z axis, and that is also not deformed in the longitudinal direction is provided by the reinforcing portions 17 and 27.

The same tester is used for each of the door lock case according to the present invention which is press-formed by a plate material having a thickness of 1 mm, the die-casting door lock case having a thickness of 1 mm, and the press-formed conventional door lock case shown in FIG. As a result of a strength test in which a strong force is applied to the latch using, the door lock case according to the present invention has one point as shown by the solid line in FIG. It has been proved that the die-cast molded product shown by the chain line has significantly higher rigidity.

[0019]

As described above, according to the present invention, the front plate mounting piece is formed by bending outward at the front end edges of both side plates of the housing, and the front plate mounting piece is covered with a cover plate. Since the front plate bent and formed on the front edge is joined to connect the housing and the cover plate, the front plate mounting piece double-folded through the side plate makes it strong in the X-axis direction. By the rigidity and the rigidity of the front plate bent downward from the cover plate in the Y-axis direction and the Z-axis direction, the front plate has the X-axis direction and the Y-axis direction.
By imparting all the rigidity in the axial direction and the Z-axis direction, the door lock case of this type of press molding can be tightly formed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a door lock case showing an embodiment of the present invention.

FIG. 2 is a view showing an assembled state of the above case.

FIG. 3 is a view showing an internal structure of the above case.

FIG. 4 is a diagram showing the strength of the case.

FIG. 5 is a plan view showing an example of a conventional door lock case.

[Explanation of symbols]

 10 Housing 13 Side plate 16 Front plate mounting piece 20 Top cover 26 Front plate

Claims (2)

[Claims] 1. A front plate mounting piece is bent outwardly at each front end edge of the side plates provided on both sides of a box formed by pressing side plates upright on four sides to form a box shape. The cover plate that covers the upper surface of the housing is formed by bending the front plate downward at the front edge of the cover plate, and with the front plate joined to the front surface of the front plate mounting piece, the cover plate is placed on the housing. A door lock case characterized by being combined into one. 2. The front plate and the front plate mounting piece on each side,
The door lock case according to claim 1, wherein the reinforcing portion having a convex cross section is formed by pressing in the longitudinal direction.