EP1728568B1 - Crimping pliers - Google Patents

Abstract

The crimping tool, comprising levers (6, 7) with plastic covered handles (M1, M2) and jaws (1, 3) with a matrix (2) and crimping bit (4) respectively, has the matrix jaw ending in a section that lies at an oblique angle to the crimping bit's direction of travel. The two jaws have thrust edges that meet when the jaws are closed by being rotated about four pivots (5, 8, 9, 10) at the corners of an asymmetrical quadrilateral. The matrix is made in one piece with the first jaw, while the crimping bit is interchangeable in the second.

Description

The invention relates to a crimping tool for crimping profiles of different dimensions.

When assembling profiles to form partition walls or any other type of separation between two spaces or where such profiles must be assembled to form a frame for receiving plate or panel separating elements, the plasterer There are essentially two possibilities for fastening the profiles to one another. The first possibility is to drill holes in the profiles to be assembled and to insert screws or rivets. The second possibility is to use a crimping pliers and thus obtain a fast and solid staple profiles relative to each other without prior drilling.

However, with the crimping pliers used until now, the choice of crimping positions is limited.

Indeed, the document US-A-3,505,714 discloses crimping pliers for crimping profiles. This clamp comprises a first jaw provided with a matrix and a second jaw provided with a crimping tool whose longitudinal extent defines a direction of work. The clip further includes two handle legs for pivoting the jaws between an open position and a closed position at the end of a crimp. When the clamp is in the closed position, end portions of the two jaws are aligned with each other because one forms the die and the other has a tool (2).

Pliers such as those described above which have rectangular-shaped jaws can be used easily to crimp free profiles, but their use is limited when it comes to crimping profiles arranged in small spaces.

Indeed, the profiles usually used to form partition walls or separations, comprise at least U-shaped profiles for forming rails arranged for example on the floor and ceiling of a space in which a partition must be erected, as well as L-shaped profiles for forming uprights arranged between the floor rails and those of the ceiling.

Similar profiles are also used to form frames for wall doubling. These frames correspond essentially to those of partitions or separations, with the exception of their short distance from the wall to be doubled. This short distance does not change the assembly principle of the profiles, but constitutes an access constraint for the crimping pliers.

When the frame is placed on a wall intended to receive facing panels, the crimping of the uprights on the U-shaped rails may be carried out in that of the two sides of the U-shaped section situated on the side of the wall, so that the opposite side of the wall U-shaped profile, oriented towards the workpiece, retains an intact appearance.

However, to access the rear side of the U-profile, to perform the crimping, the crimp profile must be sufficiently small, relative to the free space behind the profile, to be able to pass a jaw of a clamp not very big between the wall and the rail. At the same time, the dimensions of the clamp must be such that the other jaw of the clamp can be inserted between the two sides of the U-shaped section in order to be able to perform crimping.

When, on the other hand, the upright is a U-shaped section disposed in the rails so that the median part of the U-profile is turned towards one side or the other of the partition to be erected, it is necessary to be able to place the crimping pliers so that one of the two jaws of the crimping pliers can penetrate to the bottom of the U-shaped section of the upright and that the other jaw can land on the corresponding side of the rail. Such crimping is problematic when the U-shaped profile forming the upright is not very deep or when there is enough room behind the profile to pass a crimping tool with the appropriate dimensions of the jaws.

But when the plasterer encounters such an arrangement of the profiles on a frame arranged on a wall, there is usually very little space behind the profiles. As a result, a clamp whose jaws have large dimensions and which could therefore be suitable for crimping large profiles, could not pass behind the profiles.

In return, when it comes to crimping profiles of small dimensions, there is generally no space needed around or around the profiles, for a crimping pliers having large jaws can be inserted.

The object of the invention is therefore to provide a crimping pliers that can be used to crimp profiles of different dimensions and this, preferably also in different mounting positions profiles.

The object of the invention is achieved with a crimping pliers for crimping profiles of different dimensions, comprising a first jaw provided with a matrix and a second jaw provided with a crimping tool formed by a pointed elongated element of which longitudinal extent defines a working direction, the first and second jaws being hinged together on a first axis allowing them to be pivoted between an open position to be engaged on a crimped profile and a closed position at the end of crimping, and a first branch and a second branch hinged together on a second axis and articulated with the jaws on a third and a fourth axis respectively disposed on the first jaw and the second jaw allowing them to rotate the jaws between the open position and the closed position.

According to the invention, the first jaw comprises a jaw body housing the first and third axes, and an arm extending the jaw body towards a free end of the first jaw, the free end being provided with the matrix, and when the clamp is closed the arm extends obliquely to the direction of work of the crimping tool.

Such a multiprofile pliers of the invention is distinguished from the crimping pliers used until now in that the parts of the jaws which are respectively provided with a matrix and a crimping tool, are no longer aligned with one another. on the other, but form an angle between them. This angle is obtained by conforming one of the two jaws of the crimping tool of the invention so that at least a portion of the jaw provided with the matrix extends obliquely with respect to a working direction corresponding to the longitudinal extent of the tool. This angle between the direction of longitudinal extent of the arm and the working direction of the crimping tool varies according to the precise position between the open position and the closed position of the jaws of the clamp.

For practical reasons of use, it will generally be the jaw provided with the die which will extend obliquely with respect to the direction of work of the tool when the clamp is in the closed position. The jaw provided with the tool will extend substantially transversely to the working direction of the tool.

Furthermore, the first and second jaws of the crimping tool of the invention are individual parts pivotally mounted both relative to each other and relative to the branches of the clamp by which the clamp is actuated.

In order to obtain a reduction of the angular movement of the branches of the clamp during its use, the first to fourth axes are arranged relative to each other so that the distances between the first axis and respectively the third and the Fourth axes are greater than the distances between the second axis and the third and fourth axes, respectively.

According to one embodiment of the invention, the first to fourth axes are arranged relative to each other so as to define the four corners of an asymmetrical quadrilateral irrespective of the position of the jaws.

Advantageously, the first and second jaws are each provided with a support edge, the support edges serving for mutual support of the two jaws on one another when in the closed position.

• la matrice est formée en une seule pièce avec le bras de la première mâchoire ;
• l'outil de sertissage est une pièce rapportée à la seconde mâchoire ;
• l'outil de sertissage est une pièce interchangeable fixée sur la seconde mâchoire par au moins un boulon ;
• l'outil de sertissage est une pièce interchangeable fixée sur la seconde mâchoire par un boulon et une goupille ;
• la seconde mâchoire est au moins partiellement fendue à l'endroit où est fixé l'outil de sertissage, de manière que l'outil soit tenu dans la fente ;
• la seconde branche est pourvue d'une partie proéminente orientée vers la première branche et s'amenuisant vers celle-ci.
  Les dispositions de l'invention selon lesquelles une partie de la mâchoire pourvue d'une matrice forme un angle avec la direction de travail de l'outil de sertissage, permettent d'introduire cette mâchoire à l'intérieur d'un profilé à partir d'un côté ou de l'autre de celui-ci et ne nécessitent plus de l'introduire dans l'alignement de la direction de travail de l'outil de sertissage, comme cela est le cas des pinces à sertir utilisées jusqu'à maintenant.
  Les dispositions de l'invention permettent ainsi d'introduire l'outil dans un profilé à sertir, même lorsqu'il n'y a pas beaucoup de place derrière le profilé, et d'effectuer en plus, lors de l'introduction de la mâchoire à l'intérieur d'un profilé à sertir, un mouvement en courbe, non nécessairement en arc de cercle, jusqu'à ce que l'extrémité libre de la mâchoire pourvue d'une matrice puisse prendre appui à l'intérieur du profilé. Afin de pouvoir exploiter ces dispositions de l'invention pleinement, les deux branches de la pince à sertir de l'invention sont disposées par rapport aux deux mâchoires de manière que
• lorsque la pince est entièrement fermée, les deux branches sont orientées de manière à former avec une ligne transversale passant le long le dos de la première mâchoire, par rapport à la direction de travail de l'outil de sertissage, un angle orienté vers le même côté de cette ligne transversale que la seconde mâchoire ;
• lorsque la pince est entièrement ouverte, la première branche se trouve partiellement de l'autre côté de ladite ligne transversale, vue par rapport à la seconde mâchoire, mais ne se trouve en tout cas aucunement au-delà de la ligne marquant la direction suivant laquelle le bras de la première mâchoire s'étend ;
• lorsque la pince commence à se fermer, la première branche retourne très vite entièrement du même côté de ladite ligne transversale que celui duquel se trouvent la seconde branche et les mâchoires.

The present invention also relates to the features hereafter considered in isolation or in any technically possible combination:

• the matrix is formed in one piece with the arm of the first jaw;
• the crimping tool is a patch attached to the second jaw;
• the crimping tool is an interchangeable piece attached to the second jaw by at least one bolt;
• the crimping tool is an interchangeable piece attached to the second jaw by a bolt and a pin;
• the second jaw is at least partially slotted where the crimping tool is fixed so that the tool is held in the slot;
• the second branch is provided with a prominent part oriented towards the first branch and tapering towards it.
  The provisions of the invention according to which a portion of the jaw provided with a matrix forms an angle with the direction of work of the crimping tool, make it possible to introduce this jaw inside a profile from one side or the other of the latter and no longer need to introduce it in the alignment of the working direction of the crimping tool, as is the case with crimping pliers used until now .
  The provisions of the invention thus make it possible to introduce the tool into a crimp profile, even when there is not much space behind the profile, and to perform in addition, during the introduction of the jaw inside a crimped profile, a curved movement, not necessarily in a circular arc, until the free end of the jaw provided with a matrix can bear inside the profile . In order to be able to exploit these provisions of the invention fully, the two branches of the crimping tool of the invention are arranged with respect to the two jaws so that
• when the clamp is fully closed, the two branches are oriented so as to form with a transverse line passing along the back of the first jaw, with respect to the working direction of the crimping tool, an angle oriented towards the same side of this transverse line as the second jaw;
• when the clamp is fully open, the first branch is partially on the other side of said transverse line, viewed in relation to the second jaw, but is in any case not beyond the line marking the direction in which the arm of the first jaw extends;
• when the clamp begins to close, the first branch very quickly returns completely to the same side of the transverse line as that of which are the second branch and the jaws.

With this arrangement of the branches relative to the jaws, it is ensured that the plaquiste can insert the clip behind a profile, and then inside it, to put it in crimping position and that during this movement in curve, the position of the first branch does not interfere in the execution of this curved movement.

• la figure 1 montre une pince de l'invention en position fermée,
• la figure 2 montre la pince de l'invention en une position intermédiaire,
• la figure 3 montre la pince de l'invention en position ouverte et
• la figure 4 montre une coupe transversale IV-IV de la figure 1.

Other features and advantages of the present invention will emerge from the following description of an embodiment of the clamp of the invention, this description being made with reference to the drawings in which:

• the figure 1 shows a clamp of the invention in the closed position,
• the figure 2 shows the clamp of the invention in an intermediate position,
• the figure 3 shows the forceps of the invention in open position and
• the figure 4 shows a cross section IV-IV of the figure 1 .

The figure 1 shows, in a side view, a clamp according to the invention with fully closed jaws. This figure also shows the different directions and orientations mentioned above which contribute to characterize the clamp of the invention.

The clip shown on the figure 1 comprises a first jaw 1 provided with a matrix 2 and a second jaw 3 provided with a crimping tool 4 formed by a pointed elongated element whose longitudinal extent defines a working direction T. The first and second jaws 1, 3 are hinged together on a first axis 5 allowing them to be pivoted between an open position to be engaged on a crimped section and a closed position at the end of the crimping, and a first branch 6 and a second branch 7 hinged together on a second axis 8 and articulated with the jaws 1, 3 on a third 9 and a fourth 10 axes respectively disposed on the first jaw 1 and the second jaw 3 allowing them to rotate the jaws 1, 3 between the open position and the closed position.

The first jaw 1 comprises a jaw body 11 housing the first and third axes 5, 9 and an arm 12 extending the jaw body 11 towards a free end 13 of the first jaw 1, the free end 13 being provided with the 2. The arm 12 extends in a direction B forming an angle S with the working direction T of the crimping tool 4.

The first to fourth axes 5, 8, 9, 10 are arranged relative to each other so that the distances between the first axis 5 and the third axis 9 and the fourth axis 10 respectively are greater than the distances between the second axis 8 and respectively the third axis 9 and the fourth axis 10.

The first and second jaws 1, 3 are each provided with a bearing edge 14, 15. These edges are used for mutual support of the two jaws 1, 3, one on the other, when they are in contact with each other. closed position.

The four axes 5 and 8 to 10 are made here in the form of bolts, that is to say by hexagonal screws passing through the branches and / or the jaws and having at their ends opposite to the screw heads, self-locking nuts.

The curved shape of the second branch 7 is chosen so as to obtain, during a crimping operation, fairly quickly a sufficient approximation of the two branches 6, 7 to allow the platemaker to manipulate the clamp with one hand. From this moment, also thanks to an appropriate choice of the positions of the four axes 5 and 8 to 10, the plaquiste can exert a sufficiently large force with only one hand to obtain a correct crimping.

The free ends of the first and second branches 6, 7 are each provided with a plastic handle M1, M2. These handles are shaped to ensure safe handling of the clamp by the plaquiste during crimping work. They are made of plastic material.

One of the two branches of the clamp, here the branch 7, is advantageously provided with a protruding part 19 oriented towards the first branch 6 and tapering towards it. This detail is represented on the figure 4 which is a cross section shown on the figure 1 by a section line IV-IV passing transversely through the first branch 6 and the second branch 7. This design detail avoids the plaquiste, when approaching the end of the crimping movement and especially when handling the crimping pliers with one hand, to be injured by hand by pinching.

The figure 2 shows, in a perspective view, the jaws 1, 3 of the clamp in the open position and the beginning of the branches 6, 7. This figure shows in detail that the die 2 is formed in one piece with the arm 12 of the first jaw 1 and that the crimping tool 4 is a part attached to the second jaw 3. More specifically, the crimping tool 4 is here an interchangeable piece fixed on the second jaw 3 by a bolt 16 and a pin 17. The second jaw 3 is partially split at a location 18 where the crimping tool 4 is fixed, so that the tool 4 is held at the free end of the jaw 3 in the slot 18.

The figure 3 shows the jaws and the beginning of the branches of the forceps of the invention in fully open state. The figure 3 also shows some intermediate positions of the tool 4 between the fully open position of the jaws and their closed position, that the second jaw 3 and therefore especially the tool 4 moves relative to the first jaw 1 on a curve C.

Moreover, the drawings show, especially when we compare the figure 1 which shows the forceps of the invention in a fully closed position, with the figure 3 , which shows the forceps of the invention in fully open position, that the four axes 5, 8, 9 and 10 are arranged relative to each other so as to define the four corners of an asymmetrical quadrilateral, which whatever the position of the jaws. The figure 2 shows this too, but less clearly because of perspective.

Claims (10)

1. Crimping pliers for crimping profiles of different dimensions, comprising a first jaw (1) provided with a die (2) and a second jaw (3) provided with a crimping tool (4) formed by an elongated pointed member the longitudinal extension of which defines a working direction (T), the first and second jaws (1, 3) being hinged to one another at a first pin (5) allowing them to be pivoted between an open position to be engaged on a profile to be crimped and a closed position after crimping, as well as a first leg (6) and a second leg (7) hinged to one another at a second pin (8) and hinged with the jaws (1, 3) at a third (9) and a fourth (10) pin, respectively arranged on the first jaw (1) and on the second jaw (3), allowing for the jaws (1, 3) to be pivoted between the open position and the closed position, the first jaw (1) comprising a jaw body (11) housing the first (5) and the third (9) pins, and an arm (12) extending the jaw body (11) towards a free end (13) of the first jaw (1), the free end (13) being provided with the die (2),
   characterized in that when the pliers are in the closed position, the arm (12) extends diagonally with respect to the operating direction (T) of the crimping tool (4).
2. The pliers according to claim 1, characterized in that the first (1) and the second (3) jaws are each provided with a bearing edge (14, 15), the bearing edges (14, 15) being used thereby for the two jaws (1, 3) mutually bearing on each other when they are in the closed position.
3. The pliers according to claim 1 or 2, characterized in that the first to fourth pins (5, 8, 9, 10) are arranged with respect to each other so that the distances between the first pin (5) and respectively the third (9) and the fourth (10) pins are greater than the distances between the second pin (8) and respectively the third (9) and the fourth (10) pins.
4. The pliers according to claim 1 or 2, characterized in that the first to fourth pins (5, 8, 9, 10) are arranged with respect to each other so as to define the four corners of an asymmetrical quadrangle, whichever the position of the jaws (1, 3) may be.
5. The pliers according to any of claims 1 to 4, characterized in that the die (2) is formed integrally with the arm (12) of the first jaw (1).
6. The pliers according to any of claims 1 to 5, characterized in that the crimping tool (4) is a part joined to the second jaw (3).
7. The pliers according to any of claims 1 to 5, characterized in that the crimping tool (4) is an exchangeable part fastened to the second jaw (3) by at least one bolt (16).
8. The pliers according to any of claims 1 to 5, characterized in that the crimping tool (4) is an exchangeable part fastened to the second jaw (3) by a bolt (16) and a cotter pin (17).
9. The pliers according to any of claims 6 to 8, characterized in that the second jaw (3) is at least partially slotted at the point (18) where the crimping tool (4) is fastened, whereby the tool (4) is held inside the slot (18).
10. The pliers according to any of claims 1 to 9, characterized in that the second leg (7) is provided with a prominent part (19) oriented towards the first leg (6) and tapering in the direction thereof (6).

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