FR2948503A1 - Support element for cabinet that is used for engine control in e.g. industrial site, has stop units formed such that bar is inserted in cavities closed by stop units until guidance units traverse along passage between faces - Google Patents

Abstract

The element (10) has guidance units (16, 18) located between separating partitions (30) with respect to cavities, where each guidance unit is allowed to access to a traversing passage. Stop units are accessible from an internal face closed again half of openings released by the cavities and blocked partially half of passages formed by orifices (24). The stop units are formed such that a bar is inserted in the cavities closed by the stop units until the guidance units traverse along a passage between an external face (22) and the internal face.

Description

TECHNICAL FIELD The invention relates to the mechanical support of busbars and the means for facilitating the connection to this type of conductor. More particularly, the invention relates to an element that makes it possible to form an output block of a cabinet that can be electrically connected according to different architectural options.

STATE OF THE ART

In industrial and tertiary sites, switchboards or electrical distribution cabinets and motor control include an enclosure housing the various equipment required; systems facilitate their installation and maintenance by being adapted to allow connection or isolation blocks of equipment. For example, drawers comprising an integral assembly of electrical equipment are connected to conductors, usually busbars. Games include several bars whose size and shape depend on the current required; the bars, usually parallel, are kept at a distance from each other by means of supports in order to limit their possible movements and to respect the dielectric constraints: see FR 2 771 862.

Different solutions for the supply upstream of the drawers and / or the downstream distribution are used. In particular, it is conventional that vertical bars at the bottom of the cabinet feed the drawers that come to get stuck. The same drawers are connected to output bars to which cables are connected to distribute energy to the end devices concerned. In addition to their variable section depending on their destination, the distribution bars can be located differently depending on the configuration of the installation: the connection can be made towards the back or on the side of the cabinet. But the bars are usually rigid, the use of flexible bars being complex and expensive realization: for changes in directions, intermediate devices fixed for the required configuration connect the drawers to the bars by allowing disconnection. 2677 LPu The design of an installation is complex and takes multiple parameters; in particular, the different arrangements inside the tables and the setting up of the tables themselves in the adapted premises must meet different criteria to reconcile. Changes may occur, at the time of assembly or after, with the necessary adjustments of equipment initially planned for an architecture that proves unsuitable. However, particularly for the type of output connection, lateral or rear, it appears that a late modification of the initial choice can become very heavy to implement: most existing solutions to support the busbars in an orientation and / or a different dimension involve the addition of complex systems or even very expensive bar extensions (see for example EP 0 589 775.

SUMMARY OF THE INVENTION

Among other advantages, the invention aims to overcome the disadvantages of existing connection systems. In particular, the invention relates to a support for busbars that adapts to several sections of bars and / or allows a late choice of the type of connection at the cabinet outlet. The invention also aims to optimize costs by a minimum number of parts, allowing economies of scale and gains in logistics.

In one aspect, the invention relates to a support for setting up several bars, advantageously four, and to insert electrical connection clamps, for example for a low voltage switchboard, including drawers. The support according to the invention is adapted to rigidly hold bars of several different sections, in particular rectangular sections of variable width, in particular bars of section 8 to 10 mm by 20 or 50 mm, thanks to the presence of locking means that it is possible to remove easily; the support is also adapted to maintain the bars in two different orientations, orthogonally or vis-à-vis the connection clamps.

According to the invention, the support is made in two parts, preferably identical and complementary shapes, made for example individually molded plastic. The connection supports can be associated with support brackets to be arranged along the bars to withstand the electrodynamic shocks and the tightening of the cables, 677 LPu comprising orifices for the passage of the bars, and also made in two pieces coupled to one another. one to another. According to a preferred embodiment, the holding support is in two identical mirror-stackable parts, but the holding supports can also be adapted to different sections of bars, one of the parts being then modified to adapt the size of the elements. passage holes.

In another aspect, the invention relates to one of the elements for the realization of the previous connection support. Advantageously, the element according to the invention is substantially symmetrical mirror so that the face-to-face superposition of two identical elements form said support, which reduces the number of industrial references. In particular, each element according to the invention comprises an opposite inner face and parallel to an outer face corresponding to an outer face of the support; the inner faces, which can be stacked, are provided with suitable coupling means, of the tenon / mortise type, and advantageously of means making it possible to clamp the elements one on the other.

The bars to be connected can pass through the element normally to its inner and outer faces: the outer face is provided with through-holes, preferably of rectangular shape, adapted for the insertion of bars of a predefined range. The passages thus formed are separated from each other by partition walls to ensure isolation between the inserted bars; side walls complete the set. To accommodate different sections of bars, stop means are provided to partially block the passages and leave free a portion that is adapted to a lower section in the range. Advantageously, the stop means are in the form of tabs connecting the upper end of the partitions so that it is easy to break the bridge thus formed when the section of the bars is increased.

The connection bars can also be inserted in each element parallel to its inner and outer faces: an exit face, normal to the latter, comprises recesses, preferably rectangular, open on the inner face of the element and separated between them by partition walls. The openings thus created communicate with the previous passages to allow the insertion of the bars in the direction of connection means located on the opposite entrance face. Advantageously, the size of the recess corresponds to half the size of the orifice formed on the outer face. Preferably, the stop means partially obstructing the lateral outlet passages locally close the openings formed by the recesses, to adapt to the different sizes of bars: the openings thus closed are advantageously of the same size as the unobstructed portion of the passages . Depending on the presence or absence of the stop means, bars of greater or lesser section are held without clearance in the support formed of two elements indifferently in the passages or in the openings formed by the recesses.

Faced with the recesses, the element according to the invention comprises guide means for the connection, which are also separated by the previous partitions. The guiding means are preferably adapted to connection clamps and advantageously comprise two recesses for passage of the branches of the clamps separated by a gradient protuberance, for example of triangular section, which spreads the branches then allows their tightening on a bar contiguous to the protuberance.

Preferably, the elements according to the invention are suitable for busbars of even number, and in particular for four-pole installations, so that the stop means are located on half of the recesses.

BRIEF DESCRIPTION OF THE FIGURES Other advantages and features will become more clearly apparent from the following description of particular embodiments of the invention, given by way of illustration and in no way limiting, represented in the appended figures.

Figure 1 illustrates a support according to one embodiment of the invention.

Figures 2A, 2B, 2C show different views of an element according to a preferred embodiment of the invention. FIGS. 3A and 3B show the use of a support according to FIG. 1 for two types of connection and two dimensions of bars.

FIG. 4A represents a holding support, FIGS. 4B and 4C illustrating elements capable of constituting it.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

In the detailed preferred embodiment, the support according to the invention is suitable for four bars of rectangular section (thickness e on width 1), and in particular for standard bars of size 8 × 20 or 8 × 50; the connection support is composed of two strictly identical elements of molded plastic; the connection to the bars is carried out by means of clamps comprising two branches coupled at one end and free at the other end to engage the bar according to its thickness e, the branches being urged in the clamping position in the absence of stress exterior. These illustrative options are of course nonlimiting and may be modified: the corresponding characteristics of the medium include the associated variants.

As illustrated in FIG. 1, the support 10 according to the invention comprises four means for guiding the clamps towards the inside of the support. In particular, an input face 12 of the support 10, intended to be secured to the bottom of the board, for example by means of screws in suitable orifices 14, can receive a drawer comprising an alignment of four clamps (not shown). . Each clamp is inserted into two orifices 16 separated by a guide 18 for moving apart the branches of the clamps and their return to the clamping position; for this purpose, the guides 18 are advantageously of triangular cross-section orthogonal to the inlet face 12, and the opposite side 20 of the guides 18 (FIG. 2) is advantageously of the same width as the thickness e of the bar so it is easy to remove the drawer.

According to the invention, it is possible to connect to side bars, preferably without mounting direction, that is to say that it is possible for the bars to cross the support 10 from one side. The two outer faces 22 of the support 10, orthogonal to the input face 12, 2677 LPu thus comprise four orifices 24 of rectangular section for the insertion of the bars. One of the sides of each orifice 24, and the corresponding wall of the passage created by two orifices 24 facing each other, are advantageously formed by the short side 20 of the guide 18 so that the bar can be inserted adjacent to the guide means 16, 18 and therefore be directly biased by the connection clamps; the opposite parallel side is at a distance 1 corresponding to the maximum width of the bars, here 50 mm.

Furthermore, according to the invention, it is possible to connect to bars located behind: the exit face 26 of the support 10, opposite and parallel to the entry face 12, also comprises four orifices 28 of corresponding rectangular section substantially at the section of the bars and facing the guides 18 of the input face 12. The opening in the support 10 thus created allows the bars to abut the small side 20 of each guide 18.

To ensure the mechanical and dielectric strength, each bar is insulated, that is to say that partitions 30 parallel to the long sides of the rectangular openings 24, 28 separate each of the poles, and side walls 32 close the parallelepiped formed by the external faces 22, input 12 and output 26. Preferably, with the exception of the portion near the input face 12 where the connecting clamps penetrate, the partitions 30 flank closer to the bars, c ' that is to say that the partitions 30 comprise a relatively thin first portion 34, here in the form of a separating plate, at the inlet face 12, then a thicker second portion 36, projecting on either side of the first In particular, on the second portion 36 of a length of, for example, 45 mm, three partition walls 301, 302, 303 are separated from one another by e = 8 mm, and have a final thickness of 16 mm; according to a preferred option, the second portion 36 of the partition walls 30 is in fact formed by two thin walls separated from each other to reach said thickness d = 16 mm.

The side wall 32 includes the same type of two-part arrangement to form a substantially planar outer surface and an inner surface with a retaining shoulder at the rear face 26. In addition to the possibility of rear or side connection, the support 10 allows a connection to bars of different size, said bars being held in relatively fixed position to mechanically support the electrodynamic shocks and the tightening of the connecting cables distributing the energy of said bars to the electrical devices . For this purpose, stop means make it possible to adjust the size of the passages in which the bars are inserted. The stop means are internal to the support 10, but preferably accessible to be easily removed.

The support 10 is thus formed in two elements 40 coupled to each other, each comprising an outer face 22 of the support, and an inner face 42 parallel to the outer face 22, according to which the support 12 is somehow cut . Advantageously, the two elements 40 of the support, of substantially rectangular parallelepiped shape, are identical to each other so as to optimize manufacturing and storage costs.

The internal face 42 of each element 40 advantageously comprises coupling means so as to pre-position the two elements 40 before clamping, for example by two screws, which can be placed on projecting plates (not shown) or within separating partitions 30. The coupling means are advantageously of the tenon / mortise type, with protuberances cooperating with orifices. Since the elements are superimposable in a mirror, it is advantageous for the coupling means to be provided for this purpose, for example with a protuberance 44A on a first partition wall 301 and a corresponding orifice 44B on the third symmetrical partition 303, and / or protuberance 46A on a side wall 32 and the corresponding orifice 46B on the other, and / or a protuberance 48A on a guide 18 cooperating with an orifice 48B on the guide 18 symmetrical with respect to the central partition 302. One of the means of At least one coupling 44 is advantageously associated with a hole 50 allowing clamping by screws, for example at the level of the partitions 30.

The stop means 52 are located to be accessible from the inner face 42, and preferably made so that they can be removed easily; for example, they comprise bridges 52 molded unitarily and can be sectioned. In the preferred embodiment, the stop means 52 are in minimum number, that is to say two '7 [Pu stop means 52 blocks two passages: the blocking of the two remaining passages is achieved by the another element 40 superimposed on the support 10.

In particular, the stop means comprise several bridges 52 between two partitions 30, 32, at the inner face 42, and limit the passage opening to the bottom 26 of the support 10, to leave free a passage close to the means connecting piece 16, 18: the rear face 26 of each element 40 comprises four recesses 54 of rectangular section, open on the inner face 42 to form the rectangular orifice 28; the bridges 52 on the inner face 42 divide the channel 56 created by the recess 54 so that the superposition of two elements 40 comprises four rectangular outlet orifices 28, but that the dimension of the channel 56 leading to the guide 18 is In the present case, bridges 52 connect the first partition 301 to the lateral partition 32 and to the second adjacent partition 302, creating a channel 56 facing the recess 54 with a height h limited to 20 mm, between the outer face 22 and the bridge 52. Preferably, so that the insertion of the bars 20 mm wide can be performed in the same hole 28 indistinctly at the element 40 comprising the stop means 52 or the other, the bridges 52 are extended beyond the inner face 42 by a protrusion 58 of appropriate size t, here 5 mm: facing the opening created by a recess 54 not equipped with said bridge 52 and the opening created by a recess 54 and closed by said bridge 52 generates two channels 56 also limited to 20 mm.

In order to simultaneously maintain the bars of small section in lateral insertion, the stop means 52 are positioned so as to partially block the passage between the orifices 24 of the outer faces 22. In order for the insertion of the small bars to be possible only close to the connection clamps, the bridges 52 forming stop means are connected over a distance extending along a sufficient length along the partition walls 30, from the rear face 26 so as to release the sufficient passage that on the input side 12 side. In particular, the stop means 52, 58 totally obstruct the passages facing the second part 36 of the partitions 30, and in particular the protrusion 58 connects two easily splittable bridges 52 distant from each other. mm, the first bridge 521 being located 20 mm from the short side 20 of the guides 18. 2677 LPu The number of stop means can be modified; it is for example possible to multiply the number of bridges 52, by staggering them at different depths within the channels 56 formed by the recesses 54 and the second parts 36 of the partitions 30 and at different distances from the short side 20 of the guides 18: section bridges, different lengths are obstructed and different heights h are residual.

Thus, when the stop means 52 are present, only bars 60A of 1A = 20 mm wide can be inserted, either from the rear (FIG. 3A) in the recesses 54 of one or the other of the two elements 40, or from the side by the external orifices 24 along the inlet face 12. If the stop means are broken (FIG. 3B), it is possible by the same passages to put in place bars 60B of 1B = 50 mm. As illustrated, the bars 60 can then be folded with the usual means for connecting the customer cables, for example for an output to electrical equipment located at the front.

Advantageously, between the direct output of the support 10 according to the invention and the connection to the cable concerned, the bars 60 are maintained to maintain the dielectric distances between them and mechanically support the electrodynamic shocks and the tightening of the cables of the customer connections. As illustrated in FIG. 4A, the holding support 70 comprises four longitudinal passages 72, opening on two opposite external faces 74 through rectangular orifices. Advantageously, the holding supports 70 are also made in two parts 80 comprising recesses 82 corresponding to the orifices 72 and it is easy to superpose; the inner face 84 of the parts 80 of the supports 70 is, in the same way as the connection support 10, provided with coupling means 86. The holding supports 70 are also provided with securing means 76 to a wall of the cabinet and / or the room where it is placed (Figure 3B), and / or possibly to an auxiliary support device (Figure 3A).

In order to minimize the number of industrial references, it is advantageous for the holding supports 70 to be formed of two identical pieces 80 with respect to the bars of a first section, one of the parts only being modified for the bars of a second section. In the illustrated embodiment, for the wide bars 60B (1 = 50 mm), two identical pieces 80 are superimposed, their recesses 82 having a 2677 LPu depth of the order of 25 mm; for the small bars 60A, one of the parts 80 is replaced by a modified part, here a closure plate 90 illustrated in FIG. 4C comprising the same coupling means 96 but reinforced in relief at the recesses by excrescences 92 limiting the height of the passage formed by the recess 82 closed by said plate 90. Other options are possible, but it is preferred that only two industrial references only form the two options.

Thus, the support system 10, 70 according to the invention makes it possible to keep the busbars 60A, 60B of small or large section, from the output of a functional unit to the fixing of the customer connections, in a rear or front connection configuration. , by only three industrial references.

Although the invention has been described with reference to a system of four bars 60 of rectangular section to be connected to an electrical cabinet, it is not limited thereto: other coupling variants may be concerned by the invention. In particular, for an odd number of bars 60, the stop means 52 relate to at least half of the recesses 54, and it is preferable that all the passages 56 are partially obstructed. Likewise, the previous bar sections 60 are preferred, but direct adaptation to other bar sizes, or even other forms, can be envisaged. It is also possible to implement different types of stop means 52 on the same passage and recess, thereby allowing, depending on the presence or not of each, to adapt the support 10 according to the invention for more geometries. It is also possible to modify the guide means 16, 18 according to the connection types provided.

2677 LPu

Claims (9)

REVENDICATIONS1. Support element, for connection to a busbar (60), whose substantially rectangular parallelepipedic envelope is provided with coupling means (44, 46, 48) on an inner face (42), said element (40) ) comprising: substantially parallel through passages between the inner face (42) and an opposite outer face (22) from which they open through an orifice (24), said passages being similar to each other and isolated from one another; the other by partition walls (30) and from the outside by side walls (32); recesses (54) on an outlet face (26) perpendicular to the outer (22) and inner (42) faces, said recesses (54) being in the same number as the passages, similar to each other, open on the inner face (42); ), located between the partition walls (30), and each communicating with a through passage; means for guiding (16, 18) connection clamps on an input face (12) parallel to the output face (26), the guide means (16, 18) being similar to each other, located between the partitions separating (30), facing the recesses (54) and each allowing access to a through passage; stop means (52, 58) accessible from the inner face (42) closing at least half of the openings released by the recesses (54) and partially obstructing at least half of the through passages formed by the orifices (24), the stop means (52) being such that a bar (60) which can be inserted into a recess (54) closed by the stop means (52) to the guide means (18) can also pass through the along the inlet face (12) provided with guide means (18), the through passage provided with said stop means (52), between the outer and inner faces (22, 42). 2. Support element according to claim 1 wherein the partitions (30, 32), guide means (16, 18) and stop means (52) are such that a bar (60A) of rectangular section corresponding to the opening formed by the recess (54) closed by the stop means (52) is held there without play, and is inserted without play in the through passage. 11 7 1Pu 3. Support element according to one of claims 1 or 2 wherein the depth of each recess (54) relative to the inner face (42) is substantially equal to half the length (1), parallel to the partitions ( 30, 32), orifices (24) on the outer face (22). 4. Support element according to one of claims 1 to 3 wherein the stop means (52) are located along a side wall (32) and side by side, so as to partly obstruct adjacent passages. 10 5. Support element according to one of claims 1 to 4 wherein the coupling means (44, 46, 48) are formed of protuberances (44A, 46A, 48A) and orifices (44B, 46B, 48B), and wherein the coupling means (44, 46, 48) located on one half of the inner face (42) are complementary to the coupling means (44, 46, 48) located on the other half, the halves being considered by section by a plane 15 parallel to the partitions (30, 32). 6. Support element according to one of claims 1 to 5 wherein the guide means comprise two recesses (16) separated by a protuberance (18) gradient so that a connecting clamp formed of two branches urged 20 One towards the other inserted in said means (16, 18) sees its branches spaced along the protuberance (18) and then tightened once the protuberance has passed. Support element according to one of Claims 1 to 6, in which the stop means (52) comprise a bridge connecting two partitions (30, 32) on their edge to partially obstruct the passage, and capable of being broken. 8. Support element according to one of claims 1 to 7 wherein the number of passages, recesses and guide means is even, and wherein the stop means (52) partially obstruct half of the passages. 30 9. Support element according to one of claims 1 to 8 formed of molded plastic.deprince orifices passing the bars, and also made in two parts coupled to one another. According to a preferred embodiment, the holding support is in two identical mirror-stackable parts, but the holding supports can also be adapted to different sections of bars, one of the parts being then modified to adapt the size of the elements. passage holes. In another aspect, the invention relates to one of the elements for the realization of the previous connection support. Advantageously, the element according to the invention is substantially symmetrical mirror so that the face-to-face superposition of two identical elements form said support, which reduces the number of industrial references. In particular, each element according to the invention has a substantially rectangular parallelepipedal envelope which comprises an opposite inner face and parallel to an outer face corresponding to an outer face of the support; the internal faces, which can be stacked, are provided with suitable coupling means, of the tenon / mortise type, and advantageously means allowing the elements to be clamped together, which are thus complementary between the two halves of said inner face which are superimposed to form the support. The bars to be connected can pass through the element normally at its inner and outer faces: the outer face is provided with through-holes, preferably of parallel rectangular shape, adapted for insertion of bars of a predefined range. The passages thus formed, similar to each other, are separated from each other by partition walls to ensure isolation between the inserted bars; side walls complete the set. To accommodate different sections of bars, stop means are provided to partially block the passages and leave free a portion that is adapted to a lower section in the range. Advantageously, the stop means are in the form of tabs connecting the upper end, or edge, partitions, advantageously adjacent, so that it is easy to break the bridge thus formed when the section of the bars is increased. The connecting bars can also be inserted in each element parallel to its inner and outer faces: an exit face, normal to the latter, comprises recesses, preferably rectangular, open on the internal face of the element, similar between they, in number as the passages through and the bars to be inserted, and separated from each other by the partition walls. The recesses and openings thus created communicate with the previous passages to allow the insertion of the bars into