JPH11225838A - Latching device for drawer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a drawer from opening even when it is incompletely closed. SOLUTION: A latch plate 4 having a locking hole 4a therein is pivoted to the side part of a drawer 1, and when the drawer 1 is closed by energizing the loose end of the latch plate 4 toward a locking hole 7 formed in the inner surface of a casing 6, the locking hole 4a provided in the latch plate 4 is engaged with a locking pawl 7 to prevent the drawer 1 from moving forward. In this case, a second locking hole 4b is formed behind the locking hole 4a in the latch plate 4 which can be engaged with the locking pawl 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch device for drawers such as desks and cabinets.

[0002]

2. Description of the Related Art As a conventional latch device for a drawer of this type, for example, the one described in Japanese Utility Model Publication No. 7-21787 is known. In this prior art, as shown in FIGS. 5 and 6, a pull member attached to a front plate (2) of a drawer (1).
The operation arm (3) (not shown) of (3) is linked to the latch plate (4) of the drawer (1), and in conjunction with the operation of the pull member (3), the latch plate (4) is turned on the shaft (5). Is pivoted about the main body of the furniture, that is, the locking pawl (7) of the housing (6). In the illustrated example, the latch plate (4) has a locking hole (4).
a) is formed, and a locking claw (7) of the housing (6) is engaged with the locking hole (4a).

[0003]

As described above, in the conventional drawer latch device, the latch plate (4) has the locking holes (4).
Only one a) is drilled, which can be held in a closed state by engaging the locking claw 7 of the housing 6. .

However, if the drawer is closed too vigorously when the drawer is closed, the drawer collides with the housing, and the drawer returns by reaction, and the latch hole (4a) of the latch plate (4) is closed by the housing (6).
The drawer (1) may be in an open state without being hooked on the locking claw (7). Also, if the drawer is too loosely closed, the locking hole (4a) of the latch plate (4) will not be completely hooked on the locking claw (7) of the housing (6) and will be in an open state. Sometimes. If the user does not notice this state and leaves it in the open state, the drawer (1) may be fully opened without knowing, which may make it difficult to see or hinder the passage of people.

[0005] Further, in a cabinet of a type in which large drawers are provided in many stages, such as a lateral cabinet, a fall prevention device is provided by simultaneously drawing out a plurality of drawers. If the drawers are stopped at the slightly opened position, the overturn prevention device may not be able to perform its original function or may malfunction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a latch device which prevents the drawer from opening freely even when the drawer is incompletely closed as described above.

[0007]

According to the present invention, the above-mentioned problem is solved as follows. (1) A latch plate having a locking hole is pivotally mounted on the side of the drawer, and the free end side of the latch plate is urged toward a locking claw provided on the inner side surface of the housing, and the drawer is pulled out. When the latch is closed, the latch hole of the latch plate engages with the latch claw to prevent the drawer from moving forward. A second locking hole engageable with the locking claw is provided.

(2) In the above item (1), a corner of the free end of the latch plate opposite to the housing is beveled.

[0009]

1 to 4 show an embodiment of a latch device according to the present invention. First, a description will be given with reference to FIGS. 1 and 2. FIG. Like the conventional latch device, drawer
At the side end of (1), a latch plate (4) is pivotally mounted by a vertical axis (5). The latch plate (4) is connected to an operating arm of a pull member (not shown) similar to a conventional one, and is rotated about a shaft (5) by a conventional urging means such as a spring.
The free end is urged toward the housing (6).

As is apparent from FIG. 2, the latch plate (4)
Is longer than the conventional latch plate (see FIG. 6).
(5) In addition to the closer locking hole (4a), a second locking hole (4b) is formed near the free end following this. Each of the two locking holes (4a) and (4b) is large enough to accommodate a triangular projection-shaped locking claw (7) projecting inward from the inner surface of the housing (6). That's it.

A corner near the free end of the inner surface of the latch plate (4) is beveled, and as shown in FIG. When it is rotated about the axis (5) on the side surface of the drawer (1), the angle of the oblique portion (8) is set so as to make line contact with the side surface of the drawer (1).

In such a latch device, when the drawer (1) is closed, first, as shown in FIG. 1, the second locking hole (4b) of the latch plate (4) is inserted into the housing (6). It engages with a triangular projection-shaped locking claw (7) fixed to the inner surface.

Subsequently, when the drawer (1) is pushed in and is completely closed, as shown in FIG.
The engaging hole (4a) of the housing (6) engages with the engaging claw (7) of the housing (6), and the drawer (1) is completely locked.

Release the latched state and pull out
To pull out (1), a pull member (see reference numeral (3) in FIG. 5)
And pull out the latch plate (4) via an operating arm (not shown) against the force of a biasing means (not shown).
Rotate to the side of (1), lock holes (4a) (4b) and lock claw (7)
Is released, and in this state, the drawer (1) is pulled out toward the user.

[0015]

According to the present invention, two locking holes are formed in the latch plate.
Because of the perforation, when the operation of closing the drawer is performed violently, even if the first locking hole does not
Since the second locking hole is engaged, it is possible to prevent the drawer from being opened by the recoil.

Also, even if the user closes the drawer lightly or extremely loosely, there are two locking holes, so that even if the first locking hole is hooked on the locking claw, The drawer does not unexpectedly open due to its own weight or the like, and is safe.

Since the locking hole is formed in two stages, the stopper is doubled against an earthquake or a strong impact, so that the drawer can be effectively locked and safe.

Further, even if the drawer is slightly opened to a certain time, the latch plate has two locking holes, so that the latch plate does not catch on the next locking hole and does not come off completely. Even if it does not operate for some reason, it is possible to prevent the drawer from opening on the latch device side and prevent the housing itself from tipping over.

According to the second aspect of the present invention, when the corner of the free end of the latch plate opposite to the housing is beveled, the latch plate is closed in a narrow space between the housing and the side surface of the drawer. The rotation angle of the plate can be increased. That is, when the latch plate is lengthened, its rotation range becomes large, and the above-mentioned space must be made large, and the storage amount of the drawer must be reduced. A large rotation angle of the latch plate can be obtained in the space, and it is not necessary to reduce the accommodation amount of the drawer.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a cabinet provided with an embodiment of the present invention, showing a state in which a locking claw of a housing is engaged with a second locking hole at a free end of a latch plate. FIG.

FIG. 2 is a side view of a latch plate of the latch device shown in FIG.

FIG. 3 is an enlarged transverse sectional view similar to FIG. 1, showing a state in which a locking claw of a housing is engaged with a locking hole of a latch plate.

FIG. 4 is an enlarged cross-sectional view similar to FIG. 1, showing a state in which a locking hole and a second locking hole at a free end of a latch plate are disengaged from locking claws of a housing.

FIG. 5 is a partial cross-sectional plan view of a drawer of a cabinet showing a conventional latch device.

FIG. 6 is a side view of the latch plate of FIG. 5;

[Explanation of symbols]

 (1) Drawer (2) Front plate (3) Pull member (4) Latch plate (4a) Lock hole (4b) Second lock hole (5) Shaft (6) Housing (7) Lock claw (8 ) Beveled part

Claims (2)

[Claims] 1. A latch plate having a locking hole is pivotally attached to a side portion of a drawer, and a free end side of the latch plate is urged toward a locking claw provided on an inner side surface of the housing. When the drawer is closed, the locking holes of the latch plate engage with the locking claws,
A drawer latch device for preventing forward movement of a drawer, wherein a second locking hole engageable with the locking claw is provided behind the locking hole in the latch plate. Latch device. 2. The drawer latch device according to claim 1, wherein a corner of the free end of the latch plate opposite to the housing is beveled.