EP2128364B1 - Locking system for furniture drawers - Google Patents

Description

The object of the invention is a locking system for furniture drawers, those who have a bolt connected to the drawer; this bolt actuates a locking device. All these locking devices are correlated to each other by means of a base plate attached to the cabinet and can move bidirectionally on the base plate.

1. a) sont montés plusieurs modules-support avec des dispositifs pour se déplacer, longitudinalement et de façon bidirectionnelle. Chaque module fixe un dispositif de blocage, avec des dispositifs pour son propre verrouillage ouvert ou fermé, en appliquant un effort linéaire d'une direction angulaire par rapport au déplacement du tiroir,
2. b) la direction de l'application de l'effort linéaire est orthogonale à la direction de déplacement du tiroir.

In the current state of the art, there are various locking systems for furniture drawers, such as those that, when one of the drawers is open, trigger the self-locking closure of other drawers, to prevent the tilting of the furniture. In particular, the patent EP1059408 , of the same Applicant, describes a locking system for those who have, together with the drawer, a bolt which actuates the corresponding locking device; all these devices are correlated with one another by means of a base plate fixed to the furniture and on which:

1. a) are mounted a plurality of support modules with devices for moving longitudinally and bidirectionally. Each module fixes a locking device, with devices for its own open or closed lock, by applying a linear force of an angular direction relative to the movement of the slide,
2. b) the direction of the application of the linear force is orthogonal to the direction of movement of the slide.

The patent US7144092 discloses a locking system for furniture drawers, from those having a bolt to a drawer actuating a locking device. All these devices are correlated with one another by means of a base plate fixed to the furniture and can move bidirectionally on the base plate in which each locking device is composed by a lever, which must be actuated by a bolt. incorporated in a monobloc element with a cam surface (inclined surface above the monobloc element) for the bolt and a protruding element at the back in "T" to be able to move on the base plate, and the monobloc elements adjust between them; so that by opening a drawer, the corresponding bolt actuates each time a lever of one of the locking devices.

In the patent system US7144092 , the distance between the monoblock elements is variable, and consequently any disturbance, for lack or wear, in one of the elements of the locking device, causes the bolt does not actuate the locking device.

In the patent DE19527848 there is described a cabinet in which the drawers can be removed by telescopic removal units attached to the side walls of the cabinet and carry a coupling element which can effectively connect to a control element of a control device. closure fixed on a side wall of the cabinet. Drawer load has a multiple height by a basic height. The closure device comprises a base rail with a height, which corresponds to the number of height units determined by the drawers. On the base rail (10), a number of identical slides (20) corresponding to the double height drawers are arranged. Only one predetermined positioning path upward on the base rail is provided for the slide units.

The problem is solved by the system according to the invention.

In the application, the distance between the one-piece elements is constant because the one-piece elements abut each other.

Also in the request the elements of the system are dimensioned according to the height of the monobloc.

The locking system according to the invention eliminates the need to include the aforementioned support modules since the locking device itself incorporates the elements to move longitudinally on the base plate.

1. a) le meuble qui dispose des dispositifs de blocage possède des tiroirs à une hauteur (H) qui doit être multiple d'une dimension minimale (d1) prédéterminée.
2. b) chaque dispositif de blocage est composé de :
   • b₁) un levier qui est actionné par le boulon du tiroir incorporé à
   • b₂) un élément monobloc avec une surface de came pour le boulon et une partie saillante en forme de « T » pour son glissement sur la platine-base ;
3. c) la dimension (d1) doit être multiple de la hauteur (m) de chaque élément monobloc de chaque dispositif de blocage.
4. d) le boulon correspondant est placé sur le tiroir correspondant, à une distance (Z) du bord inférieur du tiroir (C) qui est multiple de la hauteur (m) de l'élément monobloc de chaque dispositif de blocage ;
5. e) tous les éléments monobloc précités sont disposés de façon à ce qu'ils s'ajustent entre eux
6. f) les éléments monoblocs font butée entre eux; de façon à ce qu'en ouvrant un tiroir (C), le boulon correspondant actionne à chaque fois un levier de l'un des dispositifs de blocage (D).

With this locking system, according to the invention:

1. a) the piece of furniture that has the locking devices has drawers at a height (H) that must be multiple of a predetermined minimum dimension (d1).
2. b) each blocking device is composed of:
   • b ₁ ) a lever that is actuated by the bolt of the drawer incorporated in
   • b ₂ ) a one-piece member with a cam surface for the bolt and a "T" shaped projection for sliding on the base plate;
3. c) the dimension (d1) must be multiple of the height (m) of each one-piece element of each blocking device.
4. d) the corresponding bolt is placed on the corresponding drawer, at a distance (Z) from the lower edge of the drawer (C) which is multiple of the height (m) of the one-piece element of each locking device;
5. e) all the aforementioned monobloc elements are arranged in such a way that they fit together
6. f) the one-piece elements abut each other; so that by opening a drawer (C), the corresponding bolt actuates each time a lever of one of the locking devices (D).

• La figure 1 est une vue en perspective qui représente schématiquement, le système de blocage pour tiroirs de meubles, objet de l'invention, avec ses composants de base.
• La figure 2 est une vue en perspective et en détail d'un dispositif de blocage (D) avec ses composants et particularités; elle correspond à un exemple non limitatif de réalisation pratique.
• La figure 3 est une vue en perspective qui représente l'élément monobloc (10), c'est-à-dire, le dispositif de blocage (D) de la figure 2 dépourvue du levier (3)
• La figure 4 représente une vue schématisée en projection frontale d'un meuble (M) avec des tiroirs (C) ; les différentes dimensions (H) et la dimension prédéterminée (d1) y sont signalées.

In order to better understand the object of the present invention, a preferred embodiment is shown on the plans. practice susceptible of incidental changes, which do not distort the concept.

• The figure 1 is a perspective view which shows schematically, the locking system for furniture drawers, object of the invention, with its basic components.
• The figure 2 is a perspective view in detail of a locking device (D) with its components and features; it corresponds to a non-limiting example of practical realization.
• The figure 3 is a perspective view showing the one-piece element (10), i.e., the locking device (D) of the figure 2 without lever (3)
• The figure 4 represents a schematic view in frontal projection of a piece of furniture (M) with drawers (C); the different dimensions (H) and the predetermined dimension (d1) are indicated therein.

Here is the description of an exemplary practical, non-limiting embodiment of the present invention:
According to the invention, the locking system for furniture drawers, used mainly for office furniture and the like, assembles, in correlation with all the drawers (C) of a piece of furniture (M), a platinum-base (1) , or another equivalent guiding system, in turn fixed to the furniture by means (M) known.

On said platinum-base, several locking devices (D) can move linearly and bidirectionally.

At each drawer (C) of the cabinet (M), there is a bolt (B).

This system according to the invention must be completed; for example, by elements fixed on the upper part of the locking devices (D) so that they remain in their place and by other elements which must lock the assembly in the locking position. These elements are not the subject of this invention.

According to the invention, the height (H) of the drawers (C) of the cabinet (M) must always be multiple of a predetermined dimension (d ₁ ); that is to say, the predetermined dimension (d ₁₎ is multiplied many times (by an integer) for each height (H) of each drawer (C); it works with all drawers (C) regardless of the height of each drawer (C) - which can be the same (H) for all drawers (C) or different - (H ₁ ), (H ₂ ), ( H ₃ ) for one or more drawers- figure 4 .

Each locking device (D) is composed of a lever (3), actuated by the bolt (B) of the corresponding drawer (C); a one-piece member (10) defining a cam surface (20) for said bolt (B); and a protruding portion (40) in the form of a "T" which serves as a guide for its displacement on the base plate (1).

The predetermined dimension (d ₁ ) is, in turn, multiple of the height (m) of each monoblock element.

The bolt (B) is placed at a certain distance (Z) from the bottom edge of the drawer (C). This distance (Z) is multiple of the height (m) of each monobloc element (10).

Thanks to this structure and these characteristics, the monoblock elements (10) of the system fit together. Each time a drawer (C) is opened, its corresponding bolt (B) actuates a lever (3) of one of the locking devices (D).

Claims (1)

1. Locking system for furniture drawers designed for furniture (M) that have a bolt (B) joined to a drawer (C) which operates a locking device (D); all these devices correlate through a base plate (1) fastened to the furniture (M) and can move bidirectionally on said base plate (1); the system comprises:

   a) the furniture (M) that incorporates the locking devices (D) has drawers (C) with a height (H) which is the multiple of a predetermined dimension (d₁); the height of each drawer (C) can be the same (H) for all the drawers (C) or different (H1) (H2) (H3) for one or more drawers

   b) each locking device (D) consists of:

   b₁) a lever (3), which must be operated by an incorporated bolt (B):

   b₂) a monobloc element (10) with a cam surface (20) for the bolt (B) and a protruding element on the back part in "T" shape in order to move on the base plate (1); the predetermined dimension (d1) is, in turn, a multiple of the height (m) of each monobloc element (10); thus, the monobloc elements (10) of the system fit each other;

   c) the bolt (B) is located at a distance (Z) from the lower edge of the drawer (C); this distance must be a multiple of the height (m) of the monobloc element (10), and

   d) the monobloc elements (10) stop against each other;

   thus, when opening the drawer (C), the corresponding bolt each time operates a lever (3) of one of the locking devices (C).

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