FR2755304A1 - JUNCTION BLOCK, AND RANGE OF JUNCTION BLOCKS OF DIFFERENT SIZES - Google Patents

Abstract

This is a junction block of the kind comprising, for its attachment to a profile (11.I), a support part (18) and a clamping part (20), with available to the user, a control screw (21) which meshes with a nut (22) captive of the clamping part (20), the bearing part (18) comprising two flanges (32), which are arranged on both sides another of the clamping piece (20), and forming, between the nut (22) and the head (35) of the control screw (21), a collar (36), which, in its top region, at least , transversely connects the two flanges (32). According to the invention, the bearing part (18) comprises, at the base of its collar (36), at least on one side of the shaft (30) of the control screw (21), and transversely with respect to this shank (30), at least shoulder (42) against which the clamping piece (20) can come into abutment. Application, in particular, to blocks for protective conductors.

Description

"Terminal block, and range of terminal blocks of different sizes"

  The present invention generally relates to the terminal blocks to be reported on a wing profile each having an angled return, and more particularly those of these terminal blocks, then commonly called protective conductor blocks, which are to implement when the profile, and, by him, the chassis to which it belongs, is to be grounded or to a

given potential.

  More particularly, still, the present invention aims those of these terminal blocks which, for their attachment to the profile on which they must be reported, comprise, in a box of insulating material, a support piece, which is fixed in the casing , and by which they are able to come wear on at least one of the angled returns of the profile, a clamping piece, which is movable relative to this support piece, and by which they are able to come hook at least one of the angled returns of this section, with, at the disposal of the user, a control screw, which is fixed axially in the casing, and which meshes with a captive nut of the clamping piece, the bearing part comprising, each disposed respectively on either side of the clamping piece, two flanges, and forming, axially, to the right of the barrel of the control screw, between the nut and the head of this screw of control, a snare, which, in its summit zone , at least, connects the two flanges transversely, and which has axially a bore for the passage of the barrel of the screw

control.

  Such terminal blocks are particularly described in German Patent Application No. 26 19 506 and in the French patent which, filed November 29, 1977 under No. 77 35878, was published under the

No. 2 410 207.

  When clamping to a profile, whether it is an asymmetrical profile, commonly called G profile, or whether it is a symmetrical profile, commonly called profile hat or omega , the control screw exerts a tension on the clamping piece by screwing, and this latter, which generally forms a claw internal to the support piece, and which is thus fixed in rotation relative to the assembly, then to take on at least one of the returns at right angle of the profile, while, bearing itself on at least one of these returns in square, the support part, which, it remains fixed as well in translation as in rotation, is the object, by

  reaction, of an equivalent thrust.

  Under the antagonistic mechanical forces of which they

  are thus the object, these two pieces tend to deform.

  It is therefore necessary to ensure a recovery of effort

between them.

  In the French patent No. 77 35878, this effort recovery is provided by a spout, which has protruding at its top part the clamping piece, and which, extending parallel to the shaft of the control screw, is likely to

  come to a stop on the collar of the support piece.

  But, this support piece being in this case cut sheet metal and folded, and its flanges being connected to each other only at its summit, the effort recovery sought is not involved in practice than at the top of his collar. As a result, the nose of the clamping piece must extend over a not insignificant height, substantially equal to

  to that of the collar of the support piece.

  This results, in addition to a certain fragility for this beak, the need to give it a height adapted to

  that of the collar of the support piece.

  However, according to the size of a terminal block, that is,

  say according to the passage section of the electrical conductor normally to implement for its service, its various components, and therefore, in particular, its terminals, are more or less important, and therefore bulky, which leads in practice at different heights for the collar

of the support piece.

  Thus, for a range of terminal blocks comprising several terminal blocks of different sizes, the clamping pieces are necessarily different from one of these terminal blocks to another, to the detriment of costs. The present invention generally has the

  object a provision to avoid this disadvantage.

  More specifically, it firstly relates to a junction block of the kind in question and characterized in that its support piece comprises, at the base of its collar, at least one side of the barrel of the control screw, and transversely to this barrel, at least one shoulder against which the

  clamping piece can come into abutment.

  For example, when the support piece is cut sheet metal and folded, this shoulder may belong to at least one return bracket in one piece of one of its flanges, and thus only intervene on one side screw barrel

control.

  Alternatively, when, for larger sizes, the support piece is massive, this shoulder can

  extend continuously around the barrel of the control screw.

  In all cases, for terminal blocks of different sizes, the level at which the shoulder thus present at the base of the collar of the support part intervenes may, if desired, be advantageously the same for all these terminal blocks. Therefore, the clamping piece can also, if desired, be advantageously the same for all the terminal blocks, in favor of standardization for this part

  tightening, and thus the benefit of a reduction in costs.

  From this point of view, the present invention also relates to a range of terminal blocks which are distinguished in particular from each other by different heights for the collar of their support piece, this range being of a generally characterized in that the clamping piece of these

  terminal blocks is the same for all.

  The objects of the invention, their characteristics and

  their advantages, will emerge from the description which

  will follow, by way of example, with reference to the accompanying schematic drawings in which: FIG. 1 is, with local detachments, an elevational view of a terminal block according to the invention, assumed to be in place on a first type of profile; Figure 2 shows, on a larger scale, the detail of Figure 1 identified by an inset II in this Figure 1; Figure 3 is an exploded perspective view of this terminal block; Figure 4 is a different scale, and along the line IV-IV of Figure 3, a cross-sectional view of the support piece that includes the junction block; Figure 5 is, in the manner of Figure 1, a partial elevational view for a second type of profile; Figure 6 is an exploded perspective view, which, taking partly that of Figure 3, relates to a second terminal block according to the invention; Figure 7 is an exploded perspective view, which, similar to that of Figure 6, relates to a third terminal block according to the invention; Figure 8 shows, with local detachments, the elevational view of Figure 1, for the entire range that form the three terminal blocks according to the invention; Figure 9 is a cross-sectional view which, similar to that of Figure 4, relates to an alternative embodiment; FIG. 10 shows, on a larger scale, the detail of FIG. 9 indicated by an inset X in this FIG. 9; FIG. 11 is, on the scale of FIG. 10, a partial view in longitudinal section along the line XI-XI of FIG.

figure 9.

  As illustrated in these figures, and in a manner known per se, a junction block 10, 10 ', 10 "according to the invention is in the general form of a wafer, and it is intended to be reported transversely on a profile 11.I, 11.IIa, or 11.IIb winged 12A, 12B each having a

back to square 13A, 13B.

  With regard to the profile 11.I, which is an asymmetrical profiled profile commonly called G, as schematized in dashed lines in Figure 1, and as shown in solid lines in Figure 8, the wings 12A, 12B are of different heights, and their angled returns 13A, 13B are

directed inward.

  All these profiles 11.I, ll.IIa and ll.IIb have

standardized dimensions.

  With regard to the profiles 11.IIa, 11.IIb, which are symmetrical profiles, with profile commonly called hat or omega, as schematized in dashed lines in FIG. 5, the wings 12A, 12B have one and the other one same height, and their return squares 13A, 13B are directed outwards, these two sections 11.IIa and 11.IIb differing essentially from each other only by the height

  their wings 12A, 12B and their thickness.

  These two types of profile, 11.I on the one hand, and 11.IIa and 11.IIb, on the other hand, being well known by themselves and not falling within the scope of the present invention, they will not

not described in more detail here.

  Suffice it to say that, in addition to their wings 12A, 12B, they comprise a sole 14, which connects these wings 12A, 12B at their base, and which are parallel returns 13A, 13B of them, and that these square returns 13A, 13B

  extend along the free edge of the wings 12A, 12B.

  As illustrated by FIG. 8, a junction block, 10 ', 10 "according to the invention belongs in practice to a range of terminal blocks having a plurality of terminal blocks 10, 10', 10", etc. .. matching each

  respectively at different calibres.

  All these terminal blocks 10, 10 ', 10 "belong to a

same constitution.

  For the sake of simplicity, only first will be described here in detail the terminal block 10, which corresponds for example

at the lowest caliber.

  For attachment to a profile 11.I, 11.IIa, 11.IIb, this junction block 10 comprises, in a manner known per se, in a housing 15, which is made of insulating material, and which, for example, is formed two shells 16, 17 duly confronted and secured to one another, on the one hand, a support piece 18, which is fixed in the housing 15, and by which it is able to come wear on the at least one of the angled returns 13A, 13B of the profile 11.I, 11.IIa, 11.IIb concerned, and, secondly, a clamping piece 20, which is movable relative to the support piece 18 , and by which it is able to come to hook under at least one of these returns 13A, 13B, with, at the disposal of the user, a control screw 21, which is wedged axially in the housing 15 , and who meshes

  with a nut 22 trapped in the clamping piece 20.

  In practice, in order to bear on one and / or the other of the angled returns 13A, 13B of a profile 11.I, 11.IIa, 11.IIb, the support piece 18 has two wings 24A, 24B. On the wing 24A are formed, at different levels, two shoulders 25.I, 25.II, one corresponding to the profile

  11.I, the other corresponding to profiles ll.IIa and 11.IIb.

  On the wing 24B is formed, level with the shoulder 25.II of the wing 24A, a shoulder 25.II corresponding to the

profiles 11.IIa and l1.IIb.

  As a corollary, in order to be able to hook under at least one of the angled returns 13A, 13B profiles ll.IIa and 11.IIb, and, in practice, under one and the other of these, the piece 20 comprises, itself, two wings 26A, 26B, which, at the same level, each form

  respectively, inwardly, a hook 27A, 27B.

  In order to be able to hook under the angled return 13A of the profile 11.I, the clamping piece 20 further comprises, projecting on its lower surface, in the central zone thereof, a boss 28 which, on the of the hook 27A of its wing 26A, forms, itself, outwardly, and, therefore,

  in the direction of this hook 27A, a hook 27'A.

  For receiving, without clearance, the nut 22, the clamping piece 20 has, in its central zone, a recess 29, and, for free axial play of the shaft 30 of the control screw 21, this recess 29 is intersected transversely by a notch 31 which opens on the upper surface of this piece of

tightening 20.

  In practice, the clamping piece 20 forms a claw internal to the support piece 18, this support piece 18 comprising, respectively arranged respectively on either side

  of the clamping piece 20, substantially parallel to that

here, two flasks 32.

  For reception, with clearance, of the nut 22, these two flanges 32 present, each, in correspondence with

  the recess 29 of the clamping piece 20, a recess 34.

  At the right of the shaft 30 of the control screw 21, the support piece 18 forms, axially, in its central zone, between the nut 22 and the head 35 of the control screw 21, a collar 36, which, in at least its end zone connects transversely the two flanges 32, and which has, axially, a bore 37 for the passage 30 of the screw

order 21.

  In practice, the clamping piece 18 is made of metal, and, by the summit zone of its collar 36, it is in electrical connection with a bar 39, which, itself made of metal, also has two wings 40A, 40B, for cooperation, each respectively, with two connection terminals 41A, 41B, and which, in its central zone, also has a hole

  37 'for the passage of the shaft 30 of the control screw 21.

  Preferably, the clamping piece 20 is it

also in metal.

  In the embodiment shown, this is

  a massive piece, formed by simply cutting a blank.

  The foregoing provisions are well known by themselves, and therefore will not be described further in

detail here.

  According to the invention, the support piece 18 comprises, at the base of its collar 36, that is to say the part of this collar 36 furthest from the head 35 of the control screw 21, d at least one side of the barrel 30 of this control screw 21, and transversely to this barrel 30, at least one shoulder 42 against which the clamping piece 20 can abut. With regard to the lower-gauge terminal block 10, the support piece 18 is, in the embodiment

  shown in sheet metal cut and folded.

  The two flanges 32 of this support piece 18 thus extend axially over the entire height thereof, being connected to each other, on the one hand, at their summit part, by a bridge 44 , or upper trigger, which is in one piece with both of them, and, secondly, at their base, by a bridge 45, or lower bridge, which, of a alone holding with any one of them, cooperates in interlocking with the other, in favor of a recess 46 provided for this purpose in the latter, and which is at least locally set

at the edge of this recess 46.

  In this embodiment, the collar 36 is hollow over most of its height, and it connects the two flanges 32 transversely in its only summit zone, the latter being reduced in fact to the only bridge 44 upper. Only this upper bridge 44 has, axially,

the piercing 37 corresponding.

  In practice, the two bridges 44, 45 are parallel to one another, and they extend substantially

  perpendicular to the flanges 32.

  By these bridges 44, 45, the support piece 18 is closed transversely in a loop around itself, around the workpiece

tightening 20.

  The shoulder 42 that the collar 36 of the support piece 18 forms at its base belongs, in the embodiment shown, to an angled return 47 come from a single piece

of one of the flanges 32.

  For example, and as shown, this shoulder 42 is formed by the edge of this square return 47, on the side

  of the latter farthest from the upper bridge 44.

  In the embodiment shown, there are two square returns 47, and therefore two shoulders 42, due

one per flange 32.

  Preferably, and as shown, the two square returns 47 extend towards one another,

on the same side of the collar 36.

  The two shoulders 42 that comprise the support piece 18 extend, therefore, themselves, on the same side of the drum 30 of the

control screw 21.

  For example, and as shown, the two angled returns 47 extend from the side of the wing 24B of the piece

18.

  They extend further over the entire height of the collar

  36, except for the thickness of the upper bridge 44.

  Finally, in the embodiment shown, the two square returns 47 stop slightly at a distance

one of the other.

  Alternatively, however, they might as well

to be joined.

  As a corollary, for cooperation with the shoulders 42 of the support piece 18, the clamping piece 20 comprises, in correspondence with these shoulders 42, and therefore at least one side of the barrel 30 of the control screw 21, transversely by

  compared to this drum 30, a flat 48.

  In the embodiment shown, the clamping piece 20 thus has a flat 48 only on one side of the barrel

of the control screw 21.

  For example, and as shown, this flat portion 48 extends in the top zone of the clamping piece 20, at the edge of the notch 31 that it comprises, on the sole flange 26B of this clamping piece 20, and on the whole of

the thickness of the latter.

  Moreover, in the embodiment shown, the bar 39 forms an independent piece, which, distinct from the support piece 18, is superimposed on the bridge 44

higher than this one.

  In practice, in this embodiment, the upper bridge 44 of the support piece 18 has, projecting, at the edge of its bore 37, a lug 49, which, to form a key and prevent the bar 39 from rotating, s engages in a notch 50 provided so

  complementary to the edge of the bore 37 'of this bar 39.

  If, as shown diagrammatically in FIG. 1, the terminal block 10 according to the invention is attached to an asymmetrical 11.I profile, its support piece 18 comes to bear by the shoulder 25.I of its wing 24A on the return angled 13A of the wing 12A of this section 11.I, and, under the action of the control screw 21, its clamping piece 20 is hooked under the same return 13A square bracket 27'A hook his

  boss 28, along arrow F of FIG.

  If, as shown diagrammatically in FIG. 5, this junction block 10 is attached to a symmetrical 11.IIa or 11.IIb profile, its support piece 18 bears on the angled returns 13A, 13B of this profile 11. IIa, 11.IIb by the shoulders 25.II of its wings 24A, 24B, and, under the action of the control screw 21, its clamping piece 20 is hooked under one and the other of these returns at right angles 13A, 13B by the hooks 27A, 27B of its wings 26A, 26B, following

arrow F of this figure 5.

  In either case, the terminal block 10 is thus properly secured, by clamping, to the profile 11.I. ll.IIa,

11.IIb concerned.

  Together, its connection terminals 41A, 41B

  find in electrical connection with it.

  In either case, also, if the clamping of the terminal block 10 on the profile 11.I, 11.IIa, 11.IIb concerned is sufficiently accentuated, and / or if, in use, this block of junction 10 is to be the subject of any stress itself relatively accentuated, the clamping piece 20 can abut by its flat 48 against the shoulders 42 of the support piece 18, which advantageously allows recovery effort at this level between these two pieces. In the figures, the constituents of the terminal blocks 10 ', 10 "have received the same references as the corresponding constituents of the terminal block 10, affected, most often, in particular when they have different dimensions, of the index of the terminal block 10 ', 10 "concerned. In practice, the various terminal blocks 10, 10 ', 10 "according to the invention are distinguished, in particular, from each other, by different heights for the collar 36, 36', 36" of

their support piece 18, 18 ', 18 ".

  They are therefore also distinguished from each other by different heights for the shaft 30 of their control screw 21, 21 ', 21 ", and different heights for their housing

, 15 ', 15 ".

  But, as already indicated, they all have a same

constitution.

  The terminal blocks 10 ', 10 ", of which only the active part, metal, has been represented in FIGS. 6 and 7,

  will not be described in detail here.

  Only will now be described some

particularities of realization.

  As regards, first of all, the terminal block 10 ', which corresponds for example to a mean gauge, the support piece 18' is, as before, cut and folded sheet metal, FIGS. 6 and 8. But, in the embodiment shown, the bar 39 'is an integral part of this support piece 18', the wings 40A, 40B of this bar 39 'being each of one piece with the bridge 44 upper of

this support piece 18 '.

  In addition, for its reinforcement, this bar 39 'is doubled, on its lower surface, by a bar 51

  having substantially the same length as it.

  Finally, in the embodiment shown, and for practical reasons of realization, the collar 36 'has, near its summit zone, that is to say near the upper bridge 44, a width greater than the width that it presents near its base, and the return square brackets 47 of the flanges 32 extend only on the fraction of smaller width of this collar 36 'from the base thereof. With regard to the terminal block 10 ", which corresponds for example to the largest size, the support piece 18" is,

  in the illustrated embodiment, massive, FIG. 7.

  In other words, it is a piece made by

  machining, and not by cutting and folding.

  The neck 36 "of this support piece 18" is full, except, of course, its piercing 37, which extends in practice over its entire height, and it also connects

  transversely over its entire height the two flanges 32.

  Under these conditions, the shoulder 42 that this support piece 18 "comprises according to the invention at the base of its collar 36" extends continuously all around this bore 37, and therefore around the barrel 30 of the corresponding control screw 21 "Furthermore, in the embodiment shown, the

  bar 39 "is in one piece with the support piece 18".

  According to the invention, the clamping piece 20 has a same

  contour for all terminal blocks 10, 10 ', 10 "... etc ...

of the range in question.

  As a result, as shown diagrammatically in FIG. 8, the level N at which the flat portion 48 of this clamping piece 20 engages with respect to any profile, and for example the asymmetrical section 11.I shown in FIG. N being for example appreciated compared to the sole 14 of the latter, is also the same for all the blocks of

junction 10, 10 ', 10 ".

  The only difference varies, if necessary, from a terminal block 10, ', 10 ", etc. to the other, the thickness of the clamping piece 20, this thickness being able for example to be more

  low for terminal block 10 of smaller size.

  For the rest, the terminal blocks 10 ', 10 "have a constitution similar to that of the terminal block 10, to

scale close.

  They therefore comprise, in a box 15 ', 15 ", in addition to the support piece 18, 18', 18", the clamping piece 20, and the control screw 21 ', 21 ", a nut 22 and terminals of

connection 41'A, 41'B, 41 "A, 41" B.

  Like the clamping piece 20, the nut 22 can advantageously be the same for all the terminal blocks, 10 ', 10 ", etc., or at least for most of them, the block of junction 10 of smaller size may however possibly have a nut 22 of smaller diameter for

its bore.

  It has been assumed above that, when the support piece 18, 18 'is in sheet metal cut and folded, the flanges 32 which it comprises have a uniform thickness E, FIG. 4, the sheet from which this piece of 18, 18 'having itself

a uniform thickness.

  But, alternatively, and as shown in FIGS. 9 to 11, these flanges 32 may have, on the contrary, to the right of the clamping piece 20, that is to say in their current part, a lower thickness E1 at the thickness E2

  that they have away from this clamping piece 20.

  It is sufficient, for example, for this purpose, that sheet metal

  initial process was duly stamped accordingly.

  Anyway, this thickness modulation advantageously allows the support piece 18, 18 'to transversely respect a bulk overall E3 given with respect to the proper thickness E4 of the clamping piece 20, while disposing, away from the latter, and therefore in the junction areas of its two flanges 32 o mechanical stresses are likely to be the most important, a

  E2 thickness advantageously enhanced.

  More specifically, according to this arrangement, the flanges 32 of the support piece 18, 18 'have a thickness E2 reinforced right, on the one hand, its collar 36', 36 ", and therefore in the vicinity of the trigger guard 44 corresponding upper, and, secondly, the opposite side to the collar 36, 36 ', in the vicinity

lower bridge 45.

  In addition, in the embodiment shown, it is taken advantage of the thickness E2 thus reinforced to the right of the collar 36, 36 'to form, without any returns in

  square, the shoulders 42 sought at this level.

  In the embodiment shown, these shoulders 42 very simply belong at least partly to at least one stamping 52 locally affecting the flanges 32 in the portion of reinforced thickness E2 thereof. More precisely, and as before, they are at

  less partly formed by the portion of these stampings 52.

  In practice, for the constitution of the shoulders 42, the embossed 52 come in addition to the local allowance of the

flanges 32.

  Of course, the present invention is not limited to the embodiments described and shown, but encompasses any variant embodiment and / or combination of

their various elements.

Claims (14)

  1. Terminal block of the type comprising, in a housing (15, 15 ', 15 "), of insulating material, for its attachment to a profile (11.I, 11.IIa, 11. IIb) with wings (12A, 12B) each having an angled return (13A, 13B), a support piece (18, 18 ', 18 "), which is fixed in the housing (15, 15',"), and by which it is suitable to bear on at least one of the angled returns (13A, 13B) of the profile (11.I, 11.IIa, ll.IIb), a clamping piece (20), which is movable relative to the workpiece support (18, 18 ', 18 "), and by which it is able to come to hook under at least one of these return angles (13A, 13B), with, at the disposal of the user, a control screw (21, 21 ', 21 "), which is axially wedged in the casing (15, 15', 15"), and which meshes with a nut (22) trapped in the clamping piece (20), the support piece (18, 18 ', 18 ") comprising, arranged respectively on either side of the clamping piece (20), two flanges (32) and forming a t, axially, to the right of the shaft (30) of the control screw (21, 21 ', 21 "), between the nut (22) and the head (35) of this control screw (21, 21', 21 "), a collar (36, 36 ', 36") which, in its summit region, at least, connects the two flanges (32) transversely, and which axially has a bore (37) for the passage of said barrel ( 30), characterized in that the support piece (18, 18 ', 18 ") comprises, at the base of its collar (36, 36', 36"), at least one side of the shank (30). of the control screw (21, 21 ', 21 "), and transversely with respect to this shaft (30), at least one shoulder (42) against which the clamping piece (20) can abut.   2. terminal block according to claim 1, characterized in that the bearing piece (18, 18 ') being cut and folded sheet metal, the shoulder (42) that its collar (36, 36') forms at its base belongs to a return square (47) came   in one piece of one of his flanges (32).   Terminal block according to Claim 2, characterized in that the shoulder (42) is formed by the slice back to square (47).   4. terminal block according to claim 1, characterized in that, the support piece (18, 18 ') being cut sheet metal and folded, the shoulder (42) that it has at the base of its collar ( 36, 36 ') belongs at least partly to a stamping (52) locally affecting one of its flanges (32). Terminal block according to Claim 4, characterized in that the shoulder (42) is at least for   part formed by the edge of the stamp (52).   6. Terminal block according to any one of   Claims 2 to 5, characterized in that there are two   shoulders (42), one by flange (32).   7. terminal block according to claim 6, characterized in that the two shoulders (42) that comprises the support piece (18, 18 ') extend on the same side of the barrel   (30) of the control screw (21, 21 ').   8. terminal block according to claim 1, characterized in that, the support piece (18 ") being solid, the shoulder (42) which it comprises at the base of its collar (36") extends continuously around the barrel (30) of the screw control (21 ").   9. Terminal block according to any one of   Claims 1 to 8, characterized in that for cooperation   with one or more shoulders (42) of the support piece (18, 18 ', 18 "), the clamping piece (20) has on at least one side of the control screw shaft (30) at least 21, 21 ', 21 "), and   transversely to the barrel (30), a flat (48).   10. terminal block according to claim 9, characterized in that the clamping piece (20) has a flat (48) only one side of the shaft (30) of the control screw (21, 21 ', 21 ").   11. terminal block according to claim 1, characterized in that, the support piece (18, 18 ') being cut sheet metal and folded, the puddles (32) it comprises have a thickness (El) to the right of the clamping piece (20) smaller than the thickness (E2) that they have away from this piece of tightening (20).   12. terminal block according to claim 11, characterized in that the flanges (32) of the support piece (18, 18 ') have a thickness (E2) reinforced at the right of the collar (36, 36 ') thereof.   13. Terminal block according to any one of   claims 11, 12, characterized in that the flanges (32)   of the support piece (18, 18 ') being connected to each other by a bridge (45) on the side opposite to the collar (36, 36'), they have a   reinforced thickness (E2) in the vicinity of this bridge (45).   14. Range of terminal blocks with multiple terminal blocks (10, 10 ', 10 "), all of which comply with one of   any of claims i to 13, are particularly distinguished   from each other by different heights for the collar (36, 36 ', 36 ") of their support piece (18, 18', 18"), characterized in that the clamping piece (20) has a same   contour for all terminal blocks (10, 10 ', 10 ").