Supports: cabinet structure – Gang-bar type locking or latching means – Concealed
Patent
1990-03-05
1991-08-20
Falk, Joseph
Supports: cabinet structure
Gang-bar type locking or latching means
Concealed
E05C 706
Patent
active
050408585
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a mounting for an article of furniture having superimposed drawers.
In a known mounting of the type under consideration, an operating cam is in the form of a pin is mounted on an arm. The arm is secured to a rail section which can be pulled out with the drawer. The pin cooperates with a rotary slide which is in the form of a forked lever and can be pivoted into two terminal positions by means of a tension spring. When the drawer is pulled out, the forked lever is pivoted in such a manner that, after a relatively short travel, the pin on the arm comes out of engagement with the forked lever. Since the rotary slide is moved beyond the dead point, it remains in this position. When the drawer is pushed in, the pin on the arm comes into contact with the forked lever. As soon as the dead point has been passed, the drawer is pulled into the terminal position by the spring and also held in this position.
This mounting is designed such that all drawers of a file cabinet or desk, for example, can be in the open position at one time. For safety reasons, however, it should be possible to pull out only a single drawer. It is also desired that, in the closed position, the front plate of a drawer lies against the front side of the article of furniture without a gap. The known mounting is further designed such that the drawer cannot be returned to the closed position if, while the drawer is open, the rotary slide is inadvertently manually pivoted to the position corresponding to the closed position of the drawer.
SUMMARY OF THE INVENTION
It is an object of the invention to develop a mounting which allows only one of a plurality of drawers to be pulled out at one time. During closing, each drawer is to be pulled into the closed position over a relatively short distance and is to be held in this position. Each drawer is to be brought into the closed position even in case of improper operation, and rebounding of the closed drawer when this is pushed in with excessive speed or force is to be prevented.
According to the invention, the rotary slide functions not only to bring the retracted drawer into the closed position through the final, relatively short section of its path and to hold it in this position but, in cooperation with a blocking strip, to prevent extension of the remaining drawers when such drawer is pulled out. This becomes possible because the rotary slide is also displaceable in the direction of movement of the drawer in particularly simple fashion. By means of a peg which is affixed to the rotary slide and projects into the inclined part of the angular groove of the blocking strip, the horizontal movement of the rotary slide is converted into a vertical displacement of the blocking strip since the peg slides within the groove and, depending upon the direction of movement of the rotary slide, lifts or lowers the blocking strip. The rotary slide is accordingly to be considered as a drive member for the blocking strip. By virtue of the dual function, a particularly simple structural design is achieved.
The mounting under consideration is designated in the art as a self-retracting mounting. A resilient return is achieved not only by means of the spring-loaded rotary slide but also due to cooperation of the rotary strip with the blocking strip. As a result, a braking member is obtained.
In accordance with one embodiment of the invention, the operating cam, which is moved along synchronously during extraction of the drawer, initially abuts the free edge of the resilient arm thereby drawing along the rotary slide and simultaneously rotating it to such an extent over a section of its path that the operating cam is disengaged from the rotary slide. The rotary slide normally remains in this position. Upon retraction, the operating cam travels up an abutment cam of the rotary slide so that the rotary slide is moved back to the starting position counter to its previous motion with simultaneous rotation in the opposite direction. However, if the rotary slide is manua
REFERENCES:
patent: 4396239 (1983-08-01), Wissman
Kruse Detlev
Pohlmann Volker
Falk Joseph
Kontler Peter K.
Paul Hettich GmbH & Co.
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