JPS6023414Y2 - Earthquake-resistant latch mechanism in filing cabinets - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an earthquake-resistant latch mechanism in a filing cabinet.

In general, the drawers installed in filing cabinets are not equipped with a latch mechanism unless they are locked, so there is a risk that the drawers will automatically pull out and fall when hit by an earthquake or during transportation.

The present invention eliminates the above-mentioned defects and proposes a latch mechanism that can sufficiently withstand earthquakes and other vibrations, and is mainly applied to medium-sized drawers, such as the upper sleeve drawer of the desk shown in the first drawing. In other words, a U-shaped support frame is fixed to the back cover facing the front plate of the drawer, and both ends of the support frame are in grooves, and one end is provided with a hook. On the other hand, a substantially U-shaped latch member is provided which is pivotally supported on the side plate of the drawer via a caulking shaft and has a tendency to rotate in the locking direction by a spring, and one of the latch members is A locking claw is provided protruding on the support arm to face the locking hole of the guide rail, and the other support arm is provided with an inclined edge to face the hook of the operating rod, while a locking claw is provided inside the handle on the front plate. The present invention is characterized in that a latch lever whose upper portion is integrally connected to the operating rod is swingably provided.

An example of implementing the present invention will now be described in detail with reference to the drawings.

Figure 1 is a perspective view of an office desk equipped with the mechanism of the present invention, Figure 2 is an enlarged partially cutaway front view of the upper drawer in the sleeve of the desk, and Figure 3 is an enlarged partially cutaway side view of the same essential parts. , FIG. 4 is a perspective view of the latch member.

In the drawing, 1 is an office desk, and the sleeve S is equipped with three drawers 2at, 2by, and 2c extending from the top, middle, and bottom, and the present invention is mainly applied to the drawers 2a or 2b. The embodiments shown in FIG. 2 and below are installed in a drawer 2a.

Reference numeral 3 denotes a pull provided on the front plate 4 of the drawer 2a, in which a latch lever 5 is provided integrally with an operating rod 6 as shown in the second and third figures, and the operating rod 6 is a U-shaped support frame. The receiver of 7 is groove 7a
is supported horizontally by

The tip of the operating rod 6 is bent to form an L-shaped hook portion 6a.

Reference numeral 8 denotes a substantially U-shaped latch member, in which one support arm 8a is provided with a locking pawl 9 and a shaft hole 10, and the other support arm 8b is provided with an inclined edge 11.
, and as shown in the third figure, is supported by a caulking shaft 12,
The spring 17 provides a tendency to rotate clockwise in the figure (locking direction).

Further, the hook portion 6a of the operating rod 6 is exposed to the above-mentioned inclined edge 11.

Therefore, when the latch lever 5 is rotated in the direction of the arrow, the operating rod 6 also rotates its hook portion 6a, and as a result, the inclined edge 11
While sliding on the top, the latch member 8 is rotated counterclockwise in the figure around the crimping shaft 12.

Reference numeral 13 denotes a guide rail for guiding the drawer 2a, which has a U-shaped cross section, and has a protrusion 1 of the side plate 14 of the drawer 2a on the inside thereof.
4a is partially housed, and smooth reciprocating motion is performed via the slider 15.

Reference numeral 16 denotes a locking hole drilled in this guide rail 13, which faces the locking pawl 9 of the latch member 8 described above, and is designed to receive the locking hole. A through hole 14c is provided through which the retaining claw 9 passes.

Reference numeral 17' denotes a back cover, which houses the main parts of the latch mechanism between it and the front plate 4.

In the latch mechanism of the present invention configured as described above, when the drawer 2a is stored, the locking claw 9 of the latch member 8
However, as shown in the third and fourth figures, the locking hole 16 of the guide rail 13
Since the drawer 2a is fitted and locked, the drawer 2a is reliably prevented from falling off due to vibration or the like.

Next, in order to pull out the drawer 2a, the latch lever 5 is rotated in the direction of the arrow in FIG. is,
The hook portion 6a is located at the inclined edge 11 of one support arm 8b of the latch member 8.
The latch member 8 is forcibly rotated counterclockwise in the figure around the crimping shaft 12, and the locking pawl 9 is disengaged from the locking hole 16 of the guide rail 13.

As a result, the drawer 2a can be taken out freely, and the latch member 8 can be returned to its original position by releasing the pressing force on the latch lever 5 in the handle.

In this state, when the drawer 2a is pushed in, the latch member 8 is pushed up by the oblique edge 9a of the locking pawl 9 and stored along the guide rail 13, and finally the locking pawl 8 and the locking hole 16 The engagement with the drawer 2a is automatically performed to prevent the drawer 2a from falling out.

As described above, according to the present invention, the drawer is always locked by the latch mechanism in the event of an earthquake, transportation, relocation, etc., so there is no risk of it falling off, and the latch member does not lock the drawer. Because it has a tendency to rotate in one direction, it can withstand relatively large earthquakes and vibrations during transportation, and the pull-out operation with the handle and release of the latch mechanism are performed in one action. This combination of convenience and the above-mentioned improvement in vibration resistance provides great practical benefits.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention. Figure 1 is a perspective view of an office desk equipped with the mechanism of the present invention, Figure 2 is an enlarged partially cutaway front view of the upper drawer in the sleeve of the desk, and FIG. 3 is a partially cutaway enlarged side view of the same essential part, and FIG. 4 is a perspective view of the latch member. 1... Office desk, 2a, 2b, 2c...
... Drawer, 3 ... Pull, 4 ... Front plate, 5 ... Latch lever 6 ... Operating rod, 6a ... Hook portion, 7...Support frame,
7a...Brace is groove, tail...Latch member, 8
av8b... Support arm, 9... Locking claw, 1
0...Shaft hole, 11...Slanted edge, 12.
...Caulking shaft, 13...Guide rail, 1
4...Drawer side plate, 15...Slider 16...Latching hole, 17...Spring.

Claims (1)

[Scope of utility model registration request] A U-shaped support frame is fixed to the back cover facing the front panel of the drawer, and an operating rod with a hook shaped at one end is suspended in the grooves at both ends of the support frame. A substantially U-shaped latch member is provided which is pivotally supported via a caulking shaft and has a tendency to rotate in the locking direction by a spring, and a locking claw is protruded from one of the supporting arms to lock the guide rail. The latch lever is arranged to face the stop hole, and the other support arm is provided with an inclined edge so as to face the hook of the operating rod, while the latch lever is located within the handle on the front plate and whose upper portion is integrally connected to the operating rod. An earthquake-resistant latch mechanism for filing cabinets, which is characterized by being swingable.