FR2495243A1 - Bolted T-joint for tubular members - uses small and large round holes in bar walls to locate round head and shaft of bolt - Google Patents

Bolted T-joint for tubular members - uses small and large round holes in bar walls to locate round head and shaft of bolt Download PDF

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Publication number
FR2495243A1
FR2495243A1 FR8025805A FR8025805A FR2495243A1 FR 2495243 A1 FR2495243 A1 FR 2495243A1 FR 8025805 A FR8025805 A FR 8025805A FR 8025805 A FR8025805 A FR 8025805A FR 2495243 A1 FR2495243 A1 FR 2495243A1
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FR
France
Prior art keywords
tube
head
screw
bolt
joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8025805A
Other languages
French (fr)
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FR2495243B1 (en
Inventor
Jacques Briand
Jean-Francois Gougeat
Francois Lebrun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telemecanique SA
Original Assignee
Telemecanique Electrique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telemecanique Electrique SA filed Critical Telemecanique Electrique SA
Priority to FR8025805A priority Critical patent/FR2495243A1/en
Publication of FR2495243A1 publication Critical patent/FR2495243A1/en
Application granted granted Critical
Publication of FR2495243B1 publication Critical patent/FR2495243B1/fr
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)

Abstract

The bolted 'T' joint (41) is used in e.g. furniture construction to make a demountable connection between two tubular members. The first member e.g. the leg (1) has two circular openings (11,12), one (11) of a dia. equal to that of the bolt (41), and the other (12) of a dia. equal to that of a cylindrical screwing-head (42). The axial length of the head equals the inside dimension of the leg plus the leg wall thickness, the bolt affixing to a transverse diaphragm plate (3) mounted in the second member or rail (2). The bolt aligns on the longitudinal axis of the leg, and the external face of the head fits flush in the large opening when the joint is assembled. The bolt may be in one piece with the head and may screw into a threaded hole (31) in the diaphragm, or may be fixed to the diaphragm and screw into an axial hole in the head.

Description

L'invention se rapporte à la réalisation d'un assemblage en T de deux tubes faisant partie d'un châssis ou d'une ossature, qui soit aisé à monter et à démonter et ne présente pas les inconvenientsdes assemblages à vissages traditionnels. The invention relates to the production of a T-shaped assembly of two tubes forming part of a frame or a framework, which is easy to assemble and disassemble and does not have the disadvantages of traditional screwed assemblies.

Si l'on fixe, en effet, un premier tube à un second tube qui vient perpendiculairement en appui sur le premier, au moyen d'une vis dont la tête prend appui sur la surface extérieure du premier tube dans une région opposee à la région de contact entre les deux tubes, le corps de cette vis traversant le premier tube pour venir se visser dans un orifice ménagé dans une pièce fixee, par exemple par soudage, au second tube, ladite region d'appui de la tête de vis subit une déformation. If, in fact, a first tube is fixed to a second tube which comes to rest perpendicularly on the first, by means of a screw whose head is supported on the external surface of the first tube in a region opposite to the region contact between the two tubes, the body of this screw passing through the first tube to be screwed into an orifice formed in a fixed part, for example by welding, to the second tube, said region of support of the screw head undergoes a deformation.

Pour supprimer cet inconvénient, l'invention propose d'utiliser une vis épaulée, dont la tête vient en appui sur la surface interne du premier tube. Par ailleurs, afin que la tête de vis ne puisse se perdre au cours des opérations de montage ou de montage, elle aura une longueur sensiblement égale à la dimension intérieure du premier tube, augmentée d'une epaisseur de la paroi de celui-ci, et affleurera au niveau de la surface extérieure du premier tube à travers un orifice ménagé dans la paroi de ce dernier, de façon à permettre le vissage au moyen d'un outil. To eliminate this drawback, the invention proposes using a shouldered screw, the head of which bears on the internal surface of the first tube. Furthermore, so that the screw head cannot be lost during mounting or mounting operations, it will have a length substantially equal to the internal dimension of the first tube, increased by a thickness of the wall of the latter, and will be flush with the outside surface of the first tube through an opening in the wall of the latter, so as to allow screwing by means of a tool.

Il ddit être bien compris que le rôle de pièce épaulée de longueur sensiblement égale à la dimension interne du premier tube, au lieu d'être joué par la tête de vis, pourrait, sans sortir du cadre de l'invention, être joué par un écrou coopérant avec le corps de la vis et ayant une face accessible à travers un orifice ménagé dans la paroi du premier tube opposee à la région d'appui dudit écrou, de façon à permettre le vissage au moyen d'un outil. It should be understood that the role of a shoulder piece of length substantially equal to the internal dimension of the first tube, instead of being played by the screw head, could, without departing from the scope of the invention, be played by a nut cooperating with the body of the screw and having an accessible face through an orifice formed in the wall of the first tube opposite to the bearing region of said nut, so as to allow screwing by means of a tool.

L'invention sera mieux comprise à l'aide de la description ci-apres :
Au dessin annexe :
La figure 1 est une vue en coupe schématique d'un assemblage conforme à un premier mode d'execution de l'invention; et
La figure 2 est une vue en coupe schématique d'un assemblage conforme à une variante.The invention will be better understood with the aid of the description below:
In the accompanying drawing:
Figure 1 is a schematic sectional view of an assembly according to a first embodiment of the invention; and
Figure 2 is a schematic sectional view of an assembly according to a variant.

A la figure 1, on a représente un premier tube 1 en position verticale et un second tube 2 en position horizontale, dont une extrémité vient er. appui sur la surface extérieure du tube vertical. Ces tubes ont a.antageusement une section carrée. In Figure 1, there is shown a first tube 1 in the vertical position and a second tube 2 in the horizontal position, one end of which comes er. support on the outside surface of the vertical tube. These tubes have, advantageously, a square section.

Le second tube est fermé, a une certaine distance de son extrémité, par une plaque 3 fixée, perpendiculairement a l'axe du second tube, avantageusement par soudage, à sa surface intérieure. On a représenté n pointille deux aimants A qui per:ettent de maintenir la plaque 3 en place a l'intérieur du tube 2 pendant l'opération de soudages La plaque 3 est n'unie d'un orifice central cIrculaire 31.  The second tube is closed, at a certain distance from its end, by a plate 3 fixed, perpendicular to the axis of the second tube, advantageously by welding, to its interior surface. There are shown in dots two magnets A which are used to hold the plate 3 in place inside the tube 2 during the welding operation. The plate 3 is not united with a central circular opening 31.

Les parois du premier tube sont respectivement munies dlun premier orifice circulaire 11 de diamètre sensiblement egal à celui de la tige 41 de la vis que comporte l'assemblage et d'un second orifice circulaire 12 de diametre sensiblement égal à celui dc la tête 42 de cette vis. The walls of the first tube are respectively provided with a first circular orifice 11 of diameter substantially equal to that of the rod 41 of the screw which the assembly comprises and with a second circular orifice 12 of diameter substantially equal to that of the head 42 of this screw.

Ces orifices-31, Il et 12 sont disposés coaxialement.These orifices-31, 11 and 12 are arranged coaxially.

On voit que la tete 42 a une longueur sensblement egale a la dimension interne du tube 1, augmentée d'une épaisseur de sa paroi 9 il en résulte quc, une face de la tête 42 étant en appui sur la surface interne du tube 1, sa face opposée vient affleurer au niveau de la surface exte- rieure du tube i. Cela permet le vissage au moyen d'un outil. A cet effet, on a représenté une tete 42 à six pans creux, dans le trou borgne 420 dans lequel on peur engager l'outil de vissage. On pourrait évidemment utiliser une tête munie d'une fente de vissage. It can be seen that the head 42 has a length which is substantially equal to the internal dimension of the tube 1, increased by a thickness of its wall 9, this results in that, one face of the head 42 being in abutment on the internal surface of the tube 1, its opposite face comes flush with the outside surface of the tube i. This allows screwing by means of a tool. To this end, there is shown a head 42 with a hexagon socket, in the blind hole 420 in which it is feared to engage the screwing tool. One could obviously use a head provided with a screwing slot.

Le vissage a évidemment pour effet, par coopération avec les filets dont est munie la tige 41 avec le taraudage dont est munl le bord de l'orifice 31, d'assujettir ensemble le premier et le second tubes sans faire subir de defor- mation notable à la paroi du premier tube, du fait que celleci est en appui sur la tranche du second tube. The screwing obviously has the effect, by cooperation with the threads with which the rod 41 is provided with the thread with which the edge of the orifice 31 is provided, to subject the first and the second tubes together without subjecting them to significant deformation. to the wall of the first tube, due to the fact that this is in contact with the edge of the second tube.

Dans la variante de la figure 2, où les mêmes numé- ros de référence désignent les pièces homologues à celles de la figure 1, la plaque 3a ne comporte pas d'orifice, mais constitue la tête de la vis fixe dont la tige est désignée par 41a. Un ecrou 42a, de longueur sensiblement égale à la dimension intérieure du tube 1, augmentée d'une epaisseur de la paroi de celui-ci, a une-face en appui sur la surface interne du tube 1 et sa face opposée qui affleure au niveau de la surface extérieure du tube 1, afin de permettre le vissage au moyen d'un outil : la face exposée de l'écrou 42a est par exemple, à cet effet, munie d'une fente. Le vissage de l'écrou 42a a pour effet d'exercer une traction sur la tige de la vis, donc d'assujettir les deux tubes ensemble, comme dans le mode d'exécution de la figure 1. In the variant of FIG. 2, where the same reference numbers designate the parts homologous to those of FIG. 1, the plate 3a does not have an orifice, but constitutes the head of the fixed screw whose rod is designated by 41a. A nut 42a, of length substantially equal to the internal dimension of the tube 1, increased by a thickness of the wall of the latter, has a face bearing on the internal surface of the tube 1 and its opposite face which is flush with the level of the outer surface of the tube 1, in order to allow screwing by means of a tool: the exposed face of the nut 42a is for example, for this purpose, provided with a slot. The screwing of the nut 42a has the effect of exerting a traction on the rod of the screw, therefore of securing the two tubes together, as in the embodiment of FIG. 1.

Aussi bien la vis 42 de la figure 1 que l'écrou 42a de la figure 2 ne risquent pas de se perdre au cours des opérations de montage et de démontage. Ces pièces ne peuvent en effet, du fait de leur longueur, pas tomber dans le tube 1.  Both the screw 42 of Figure 1 and the nut 42a of Figure 2 are not likely to get lost during assembly and disassembly operations. These parts cannot in fact, because of their length, fall into the tube 1.

Claims (3)

REVENDICATIONS 1- Assemblage en T d'un premier et d'un second tubes, ledit assemblage comportant une vis solidaire d'une piece fixée au second tUbe, caracterise en ce que le premier tube est muni de deux orifices circulaires !11, 12) dont un premier (11) a sensiblement le diamètre de la tige (41) de la vis et un second (12), sensiblement le diamètre d'une pièce cylindrique de vissage (42, 42ars de longueur sensiblement égale à la dimension interne du premier tube, augmentée d'une épaisseur de paroi du premier tube, et que ladite piece fixée au second tube est perpendiculaire à son axe et coopere avec ladite tige par une région centrale (31) coaxiale aux deux dits orifices (11, 12), une face de ladite piece de vissage (42, 42a) venant en appui sur la surface interne du premier tube (1) autour dudit premier orifice et la face opposee de ladite pièce de vissage (42, 42a) venant à travers le second orifice (12), affleurer au niveau de la surface externe du premier tube (1). 1- T-shaped assembly of a first and a second tube, said assembly comprising a screw secured to a part fixed to the second tube, characterized in that the first tube is provided with two circular orifices! 11, 12) of which a first (11) has substantially the diameter of the rod (41) of the screw and a second (12), substantially the diameter of a cylindrical screwing piece (42, 42ars of length substantially equal to the internal dimension of the first tube , increased by a wall thickness of the first tube, and that said piece fixed to the second tube is perpendicular to its axis and cooperates with said rod by a central region (31) coaxial with the two said orifices (11, 12), one face of said screw piece (42, 42a) coming to bear on the internal surface of the first tube (1) around said first port and the opposite face of said screw piece (42, 42a) coming through the second port (12) , flush with the external surface of the first tube (1). 2- Assemblage en T selon la revendication 1, carac térisé en ce que ladite pièce de vissage constitue la tête (42) de ladite vis, ladite région centrale (31) etant constitube par un orifice ménagé dans ladite pièce (3) fixée au second tube (2). 2- T-assembly according to claim 1, charac terized in that said screwing part constitutes the head (42) of said screw, said central region (31) being constitutive by an orifice formed in said part (3) fixed to the second tube (2). 3- Assemblage en T selon la revendication 1, carac térise en ce que ladite pièce de vissage est un écrou (42a), tandis que ladite region centrale de la pièce (3) fixée au second tube (2) est celle où le.corps (41a) de la vis est solidaire de ladite pièce (3).  3- T-assembly according to claim 1, charac terized in that said screwing part is a nut (42a), while said central region of the part (3) fixed to the second tube (2) is that where le.corps (41a) of the screw is integral with said part (3).
FR8025805A 1980-12-02 1980-12-02 Bolted T-joint for tubular members - uses small and large round holes in bar walls to locate round head and shaft of bolt Granted FR2495243A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8025805A FR2495243A1 (en) 1980-12-02 1980-12-02 Bolted T-joint for tubular members - uses small and large round holes in bar walls to locate round head and shaft of bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8025805A FR2495243A1 (en) 1980-12-02 1980-12-02 Bolted T-joint for tubular members - uses small and large round holes in bar walls to locate round head and shaft of bolt

Publications (2)

Publication Number Publication Date
FR2495243A1 true FR2495243A1 (en) 1982-06-04
FR2495243B1 FR2495243B1 (en) 1984-11-30

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FR8025805A Granted FR2495243A1 (en) 1980-12-02 1980-12-02 Bolted T-joint for tubular members - uses small and large round holes in bar walls to locate round head and shaft of bolt

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2123919A1 (en) 2008-05-19 2009-11-25 Eric Courtin Rigid assembly of tubular parts

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421297A1 (en) * 1978-03-31 1979-10-26 Plasticloture Sa Hollow profiled plastics section securing system - has partitions inside giving anchorage for self-tapping screws

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421297A1 (en) * 1978-03-31 1979-10-26 Plasticloture Sa Hollow profiled plastics section securing system - has partitions inside giving anchorage for self-tapping screws

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2123919A1 (en) 2008-05-19 2009-11-25 Eric Courtin Rigid assembly of tubular parts

Also Published As

Publication number Publication date
FR2495243B1 (en) 1984-11-30

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