JPH0629385Y2 - Door lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Purpose of the invention a. Industrial field of use The present invention relates to a door lock, and more particularly to a door lock of a type in which the indoor side and the outdoor side of the door are connected by a square shaft.

b Conventional Technology For door locks of the type in which the indoor side and the outdoor side are connected by a square axis, it is necessary to change the length of the square axis in order to cope with the difference in the thickness of the door. Therefore, in the past, a long rectangular shaft was prepared, cut into an appropriate length when the lock was attached, and the cut portion was polished and used. Further, for example, Japanese Patent Laid-Open No. 49-12
As described in Japanese Patent No. 7239, the angular axis is divided into two parts, and the angular axis is provided by projecting and urging each of the operating parts on the indoor side and the outdoor side of the lock by a spring, and the intermediate part of the angular axis hole of the latch. There is one in which each square shaft is inserted from inside and outside the door so that the tip of the door abuts on the door.

c Problems to be solved by the invention Among the above-mentioned conventional door locks, the one in which the square shaft is cut according to the thickness of the door requires labor and time for cutting and polishing, resulting in poor workability.

Further, in the case of using the angular axis biased by the spring, the angular axis does not abut well in the angular axis hole of the latch case if the spring has strength or weakness. Therefore, there is one in which a partition plate is provided in the middle of the hole for the square shaft, and the tip ends of both square shafts are supported by the partition plate. However, even if the spring becomes weak, the angular axis may not reach the latch sufficiently, and the operation may become uncertain. Further, since it is necessary to manufacture and stock a latch with a partition plate in addition to a general rat without a partition plate, it is uneconomical to use a common latch.

By the way, the angular axis is composed of a bifurcated mandrel and a plug-in mandrel,
A door handle has been proposed in which both of them can be engaged in a square hole of a tongue piece (corresponding to the latch case of the present invention) so as to cope with the size of the door (for example, Japanese Utility Model Publication No. 28-9859). See the bulletin).

However, if the door thickness is large, the bifurcated mandrel and the insert mandrel may be in the state shown in FIGS. 9 to 11 in the square hole of the tongue. In this case, in particular, the insert mandrel is located in the middle part of the square hole, does not come into contact with the corner part of the square hole even during rotation, and the contact area with the inner surface of the square hole is very small. ing. Therefore, even if the door twist on the side of the insertion mandrel is rotated, the turning force may not be sufficiently transmitted to the tongue through the insertion mandrel and the tongue may not be rotated.

The present invention is intended to solve the problems of the conventional door lock as described above. That is, the purpose is to eliminate the trouble of cutting and polishing the square shaft according to the thickness of the door at the time of lock installation work, projecting and urging the square shaft with a spring, or attaching a partition plate to the latch case. A door lock that can handle the difference in door thickness without using a spring, which has problems of strength and weakness, without using a complicated structure like that provided, and common parts can be achieved without partition plates for all latch cases To provide.

(B) Structure of the invention a Means for solving the problems The door lock according to the present invention is operated by the indoor operation part (1) and the outdoor operation part (2) provided with the door (13) sandwiched therebetween. In the door lock in which the angular axis connecting the parts (1) and (2) is rotated to enable the latch in the latch case (11) to operate, the angular axis ( 3) (4) are provided, and the respective tip portions thereof are made to face each other in the angular shaft hole (12) of the latch case (11), and the respective tip portions of the angular shafts (3) and (4) facing each other are Convex / concave (7) (8) (9) that is point-symmetric around the center line (x) of each angular axis (3) (4) or line-symmetric with respect to the line orthogonal to the center line (x). (10) are formed respectively, and the convex / concave portions (7) and (8) at the tip of one of the angular axes (3) and the concave / convex portions (10) (9) at the tip of the other of the angular axis (4) are formed. ), Respectively.

In the above configuration, the indoor side / outdoor operation parts (1) and (2) are
As shown in the figure, it may be a lever type or a knob type as long as it can rotate the angular axes (3) and (4). The square shafts (3) and (4) have, for example, a regular tetragonal cross section, and the lengths of the square shafts (3) and (4) on the indoor side and the outdoor side are as short as about half of the conventional single square shaft. It is a big thing. Length of convex portions (7) (9) at the tips of both angular axes (3) (4) or depth of concave portions (8) (10) (l)
In the case of a general door (13) having a thickness of about 30 to 50 mm, the thickness is, for example, about 4 to 5 mm. Double Angle Axis (3) (4)
The protrusions (7) (9) and recesses (8) (10) at the tip are
It is not always necessary to engage in the square shaft hole (12) of 1), but it is possible to engage with the door having a thin door thickness, but it is sufficient if the door has a thick door and face each other.

Convex / concave (7) (8) formed at each tip of each of the above-mentioned angular axes (3) (4)
The shapes of (9) and (10) should be point-symmetrical around the center line (x) of each angular axis (3) and (4) or line-symmetrical to the line orthogonal to the center line (x). Good. For example, in the one shown in FIG. 1 to FIG. 5, the tip surface of each angular axis (3) (4) is defined by the center line of the angular axis (3) (4).
Divide by the cross line (5) (6) centered on (x), the convex part (7) (9) at one diagonal position, and the concave part (8) (10) at the other diagonal position.
Are formed respectively.

However, the shapes of the protrusions / recesses (7) (8) (9) (10) at each tip are not limited to the above. As shown in FIG. 6 to FIG. 8, it has a point symmetry around the center line (x) of each angular axis (3) (4) or a line symmetry with respect to a line orthogonal to the center line (x). I wish I had it.

b Action To attach the door lock of the present invention to the door (13), the latch case (11) is sandwiched inside the door (13) as shown in FIG. Attach the shaft (3) (4) to the latch case (1
The indoor-side operation section (1) and the outdoor-side operation section (2) may be fixed to the door (13) by inserting them into the square shaft hole (12) of (1).

In the above case, if the thickness of the door (13) is thin, as shown in FIG. 3, the angular axis (3) on the indoor side and the angular axis (4) on the outdoor side are the angular axis holes () of the latch case (11). Convex / concave of each tip within 12) (7) (8)
(9) and (10) are engaged with each other. Therefore, compared to the conventional one in which the tip ends of the angular axes contact each other, the convex and concave parts that are engaged
(7) (8) (9) (10) Length (depth) dimension (l) only Square axis (3) (4)
The sum of the lengths of the doors becomes short, and the square shaft can be mounted on the thin door (13) without being too long.

If the door (13) has a large thickness, it is necessary to engage the convex / recessed portions (7), (8), (9) and (10) of the angular axes (3) and (4) with each other as shown in FIG. No, you may leave. However, in order to operate the latch, it is necessary to insert a few mm of the tip into the hole (12) for the square shaft, but in the present invention, the convex portion of the tip of the square shaft (3) (4) on each side
(7) A part of (9) may be engaged with the square shaft hole (12). Therefore, it is possible to deal with a door (13) having a large thickness.

When used in the thick door (13) as described above,
The issue is whether sufficient rotational power can be transmitted to the latch side via the angular axes (3) and (4). In the conventional door handle having the bifurcated mandrel and the insert mandrel, the insert mandrel is located in the middle portion of the square hole as described above when the door is thick. Therefore, it does not come into contact with the corner portion of the square hole during rotation, and the contact area with the inner surface of the square hole is also very small (see FIG. 11). Therefore, even if the door is twisted, the turning force cannot be sufficiently transmitted to the tongue through the insertion mandrel, and the tongue cannot be operated, which makes it impossible to use the door for a thick door. .

On the other hand, according to the present invention, the projections (7) (9) of the respective angular axes (3) (4)
Is point-symmetrical about the center line (x) of each of the angular axes (3) and (4) or line-symmetrical to the line orthogonal to the center line (x) as described above. Therefore, use it for thick doors (13),
Even if the projections and depressions (7), (8), (9) and (10) at both tips do not fit, at least a part of the projections (7) (9) of each angular axis (3) (4) It remains engaged in the working hole (12).

In this case, each convex portion (7) (9), when each angular axis (3) (4) is rotated,
It is possible to contact at least two corners in the angular hole (12), and the contact area with the inner side surface of the angular hole (12) is also large (Figs. 5 and 6). (See FIGS. 7 and 8).

Therefore, when the angular axes (3) and (4) are rotated by the indoor side operation section (1) or the outdoor side operation section (2), the convex sections (7) and (9) are turned into the angular axis holes.
Since it comes into contact with at least two corners of (12) and rotates with a large contact area with the inner surface of the hole (12) for an angular shaft, it goes to the latch side through each angular shaft (3) (4). Sufficient turning power can be transmitted.

This ensures that the latch can be operated even when used on a thick door (13).

C. Effect of the Invention As is clear from the above, the present invention has a simple structure and can sufficiently cope with the difference in the thickness of the door.

That is, in the case of the conventional one having one angular axis, it takes time and effort to cut and polish the angular axis according to the door thickness. In addition, the structure in which the angular axes are projected and urged by springs on the indoor and outdoor operation parts respectively has a complicated structure, and if the springs have strength and weakness, they will not work well in the holes for the angular axes of the latch case. Since it does not abut, it is necessary to provide a partition plate in the middle of the square shaft hole. However, if the spring is still weakened, the angular axis does not reach the angular axis hole of the latch sufficiently, and the operation becomes uncertain. Furthermore, since a latch case with a partition plate is required, it is uneconomical to use a common latch and increase the number of parts.

However, according to the present invention, the structure is simple because it is only necessary to form the convex and concave portions at the tips of the indoor and outer angular axes. Further, in the case of a thin door, the convex and concave portions of the respective tips are engaged with each other, so that the length is shorter than that in which the tips of the angular axes are simply in contact with each other, so that it can be applied to a thin door.
In the present invention, even if the door is thick, a part of the convex portion at the tip of each angular axis may be engaged with the angular axis hole of the latch case, so that it can be applied to a thick door. In that case, at least two convex portions of the angular axis are formed in the angular axis hole.
Since the contact area with the corner portion of the location and the contact surface with the inner surface of the hole for the square shaft are also large, a sufficient turning force is transmitted through the square shaft, and the latch can be operated reliably. And other useful effects.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing a state in which an embodiment of a door lock according to the present invention is attached to a door, and FIG. 2 is an enlargement of a tip end portion of both angular axes used in the door lock shown in FIG. FIG. 3 is a perspective side view showing the relationship between the two angular axes shown in FIG. 2 when the door is thin, and FIG. 4 is the relationship between the two angular axes shown in FIG. Vertical side view showing the case,
FIG. 5 is a vertical sectional front view in the state shown in FIG. 4, FIG.
FIG. 7 and FIG. 8 are vertical sectional front views of the tip end showing another embodiment of the square shaft, and FIG. 9 is an enlarged vertical sectional side view showing the relationship when the conventional one is used when the door thickness is thick. The figure is A- in Figure 9.
A sectional view taken along the line A and FIG. 11 are sectional views taken along the line BB in FIG. Drawing code (1) …… Indoor operation part, (2) …… Outdoor operation part,
(3) …… Corner axis, (4) …… Corner axis, (7) …… Convex part, (8) …… Concave part, (9) …… Convex part, (10) …… Concave part, (11)… … Latch case, (12) …… Square shaft hole.

Claims (1)

[Scope of utility model registration request] 1. A room / outside operation section provided with a door (13) interposed therebetween.
(1) The door lock in which the latch in the latch case (11) can be operated by rotating the angular shaft that connects the operating parts (1) and (2) by (2). (1) (2) is provided with angular shafts (3) and (4), and the tips of the angular shafts are made to face each other in the angular shaft hole (12) of the latch case (11). 3) Point-symmetrical around the center line (x) of each angular axis (3) (4) or line-symmetrical to the line orthogonal to the center line (x) at each of the opposing tips of (4) Convex / concave portions (7), (8), (9) and (10) are formed, and the convex / concave portions (7) and (8) at the tip end of one of the angular axes (3) and the other angular axis (4) are formed. A door lock that can be engaged with the concave and convex portions (10) and (9) of the tip of the door.