EP1987928A1 - Bushing for coupling a broom head with the broom handle - Google Patents

Bushing for coupling a broom head with the broom handle Download PDF

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Publication number
EP1987928A1
EP1987928A1 EP07290559A EP07290559A EP1987928A1 EP 1987928 A1 EP1987928 A1 EP 1987928A1 EP 07290559 A EP07290559 A EP 07290559A EP 07290559 A EP07290559 A EP 07290559A EP 1987928 A1 EP1987928 A1 EP 1987928A1
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EP
European Patent Office
Prior art keywords
section
diameter
hardness
additional section
mouth
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.)
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Application number
EP07290559A
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German (de)
French (fr)
Inventor
Tom Le Tan
Jérome Viel
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LBD Menage SAS
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LBD Menage SAS
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Publication date
Application filed by LBD Menage SAS filed Critical LBD Menage SAS
Priority to EP07290559A priority Critical patent/EP1987928A1/en
Publication of EP1987928A1 publication Critical patent/EP1987928A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/12—Locking and securing devices
    • B25G3/30—Locking and securing devices comprising screwed sockets or tangs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/10—Socket, tang, or like fixings with elastic, taper, or other self-grip socket or tang

Definitions

  • the present invention relates to a coupling sleeve of a brush base to a handle.
  • connection between the end of the handle of a broom and the base carrying the tufts of sweeping bristles is always provided removable to facilitate coupling and allow to replace one of these two elements if it becomes defective.
  • the upper surface of the base comprises a central zone of extra thickness constituting the lip of a well housing the end of the handle. Since, however, the material of the base is generally too soft to maintain the desired coupling, or it may crack, the inside of the well is lined with a threaded tube made of a stronger material constituting a receiving bushing. a complementary threaded end mounted on the end of the handle.
  • the present invention aims to provide a socket compatible with at least two types of tips.
  • the invention firstly relates to a coupling sleeve of a brush base to a handle, intended to be fixed to the base and comprising a first threaded section, having a first internal diameter, coupling with a threaded end of a mop handle likewise having the first diameter, received by a mouth end, characterized in that the sleeve comprises at least one additional, non-threaded section, with an internal wall, with a value of hardness less than one maximum threshold value, presenting a second diameter, which is greater or smaller than the first diameter depending on whether the additional section is located respectively in a mouth position, on the side of the mouth, or the opposite side, in the bottom position, with respect to the first section.
  • the first section is freely accessible for screwing by a tip of a first type having a first diameter.
  • the additional section occupies the mouth position
  • it is a tip of a second type, of greater diameter, which can be introduced in a controlled manner and even in force, to perform a self-tapping additional section.
  • the first section will freely pass a tip of a third type, smaller in diameter than the first two, so that it can be coupled by self-tapping with the additional section in the bottom position.
  • a third case constituting a superset of the first two, with two additional sections, respectively in the mouth and bottom positions, thus receiving three types of tips.
  • Such an alternating stacking structure of threaded sections and smooth sections can even be provided beyond three sections. It can also be provided a series of smooth sections of decreasing diameters away from the mouth.
  • Another advantage provided by the invention lies in the fact that the additional section is, in essence, compatible with any thread since it is initially smooth.
  • said hardness value of the additional section is less than a first value of internal wall hardness of the first section.
  • the first section thus has a tapping of material less deformable than that of the additional section, so that the first section can effectively maintain a tip of corresponding diameter, while, if it is a tip intended to cooperate with the additional section, the self-tapping of it may be performed by exerting a torque remaining limited, since the material of the inner wall of the additional section is of lesser hardness.
  • This characteristic is however not very troublesome for the effective maintenance of the self-tapping end thus coupled, because the self-tapping causes compression of the material, especially in the bottom zone of the grooves between the threads.
  • These bottom zones, maintained under contact pressure by the threads of the nozzle have become harder and also denser, and, being thus less elastically compressible, they constitute virtually indeformable brake jaws which therefore oppose any unscrewing and any tilting movement of the tip.
  • the inner wall of the additional section has a shore hardness of between 45 and 80, preferably between 50 and 70.
  • the slot with a purely radial extension or in a helix, thus limits the resistance to driving the tip and thus allows increased penetration thereof, with a better coupling.
  • the invention also relates to a coupler comprising a socket for a brush base and a corresponding threaded end, characterized in that the bushing is in accordance with the invention.
  • the endpiece comprises a thread having a value of hardness shore greater than a shore value of said internal wall hardness of the additional section, said hardnesses differing, preferably, from at least fifteen units.
  • the Figures 1 and 2 represent a coupler consisting of a socket 1 and a threaded end 8 with thread 9, intended to be fixed at the end of a broom handle, as evoked by the cylindrical cavity drawn.
  • the sleeve 1 of substantially cylindrical overall tubular shape about a geometric axis 10, comprises a series of sections constituted, in order, by a mouth portion 2, an inlet portion 3 with a smooth inner wall 31, that is to say, free of threads as long as a tip 8 of corresponding diameter has not been coupled, an intermediate portion 4 internal wall 41 threaded, and a bottom section 5 with internal wall 51 smooth.
  • the mouth portion 2 comprises an outer annular bead 22, or lip, constituting a reinforcing ring against any tilting force of the tip 8.
  • the mouth portion 2 has an inner wall 21 limiting a cylindrical passage to provide a axial centering of the nozzle 8.
  • the lateral profile of the inner wall 31 of the inlet section 3 passes, going towards the bottom of the sleeve 1, of a very slightly conical shape, in a range going from 2 to 6 degrees of inclination of the inner wall 31 on the axis 10, to a conical shape more marked, in this case a range of 20 to 35 degrees of said inclination, to reduce the passage section offered and thus cause, during the final screwing of tip 8 of corresponding maximum diameter, a self-tapping deeper and deeper in the inner wall 31.
  • the increasing resistance torque exerted by the friction under increasing pressure on the internal wall 31 limits the depth of penetration of the nozzle 8, which thus can not reach the intermediate section 4.
  • the intermediate section 4 is provided for an end piece 8 of intermediate value diameter, freely through the inlet section 3.
  • the bottom section 5 has generally the same characteristics as the inlet section 3, the inner wall 5 being here constant conicity and low, in a range ranging from 3 to 5 degrees.
  • the inner walls 31, 51 of the inlet and bottom sections 5 have a value of hardness less than a maximum threshold value, in order to allow the self-tapping desired by the threading 9.
  • the whole of the sleeve 1, here made of elastomer based on polypropylene, and therefore in particular the inner walls to be tapped 31 and 51, has a Shore hardness of between 45 and 80, preferably between 50 and 70.
  • the thread 9 here has a value of shore hardness greater than the shore value of said internal wall hardness 31, 51 of the inlet sections 3 and bottom 5, said shore hardness here differing by at least fifteen units.
  • an axially rearward section of each of the walls 31 and 51 comprises one or more slots, not drawn, having a certain axial extension, it is that is to say purely axial or helical, so as to form a radially expandable sleeve in order to limit the radial pressure on the threads 21.
  • the conicity of the inner walls 31 and 51 were set to a small value, or if the sleeve 1 was expandable as indicated above, then it could be tolerated that the thread 9 has a lesser hardness, that is to say out limits indicated above. Indeed, insofar as the inner wall 31 or 51 does not exert an axial force of excessive repulsion, which would spin the thread 9 and destroy any beginning of tapping, one can tolerate a significant radial crushing of the thread 9, and thus a depth of self-tapping reduced, insofar as the radial pressure exerted by the inner wall 31 or 51 is sufficiently high.
  • the final blocking of the nozzle 8 in the desired axial penetration position is then essentially ensured by the axial friction forces of the inner wall 31 or 51 constituting brake shoes, whereas the axial forces of resistance of the nets to shear, that is to say, tearing of the tip 8, may be limited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Brushes (AREA)

Abstract

The bush (1) has an intermediate section (4) coupled with an end fitting (8) of a broom stick received by an opening section (2). The end fitting has a diameter equal to an inner diameter of the section (4). Inlet section (3) and base sections (5) respectively have smooth inner walls (31, 51) with a hardness value lesser than a maximal threshold value. The sections (3, 5) have diameters higher or lesser than the diameter of the section (4), such that the sections (3, 5) are located in opening and base positions, respectively.

Description

La présente invention concerne une douille de couplage d'une embase de balai à un manche.The present invention relates to a coupling sleeve of a brush base to a handle.

La liaison entre l'extrémité du manche d'un balai et l'embase portant les touffes de poils de balayage est toujours prévue amovible afin de faciliter le couplage et de permettre de remplacer l'un de ces deux éléments s'il devient défectueux. A cette fin, la surface supérieure de l'embase comporte une zone centrale en surépaisseur constituant la margelle d'un puits logeant l'extrémité du manche. Comme toutefois le matériau de l'embase est en général trop mou pour maintenir le couplage voulu, ou qu'il risque de se fendre, l'intérieur du puits est garni d'un tube taraudé en matériau plus résistant constituant une douille de réception d'un embout fileté complémentaire monté sur l'extrémité du manche.The connection between the end of the handle of a broom and the base carrying the tufts of sweeping bristles is always provided removable to facilitate coupling and allow to replace one of these two elements if it becomes defective. To this end, the upper surface of the base comprises a central zone of extra thickness constituting the lip of a well housing the end of the handle. Since, however, the material of the base is generally too soft to maintain the desired coupling, or it may crack, the inside of the well is lined with a threaded tube made of a stronger material constituting a receiving bushing. a complementary threaded end mounted on the end of the handle.

Il existe toutefois plusieurs types classiques d'embouts de manche à balai, chacun de diamètre spécifique, de sorte que le couplage s'effectue par une douille spécifique à chacun. Pour un même diamètre, il peut aussi y avoir diverses valeurs du pas de vis.There are, however, several conventional types of mop handles, each of specific diameter, so that the coupling is effected by a socket specific to each. For the same diameter, there can also be various values of the thread.

La présente invention vise à proposer une douille compatible avec au moins deux types d'embouts.The present invention aims to provide a socket compatible with at least two types of tips.

A cet effet, l'invention concerne tout d'abord une douille de couplage d'une embase de balai à un manche, prévue pour être fixée à l'embase et comportant un premier tronçon taraudé, présentant un premier diamètre interne, de couplage avec un embout fileté de manche de balai présentant de même le premier diamètre, reçu par une extrémité d'embouchure, caractérisée par le fait que la douille comporte au moins un tronçon supplémentaire, non taraudé, à paroi interne, à valeur de dureté inférieure à une valeur maximale de seuil, présentant un deuxième diamètre, qui est supérieur ou inférieur au premier diamètre selon que le tronçon supplémentaire est situé respectivement dans une position d'embouchure, du côté de l'embouchure, ou bien du côté opposé, en position de fond, par rapport au premier tronçon.To this end, the invention firstly relates to a coupling sleeve of a brush base to a handle, intended to be fixed to the base and comprising a first threaded section, having a first internal diameter, coupling with a threaded end of a mop handle likewise having the first diameter, received by a mouth end, characterized in that the sleeve comprises at least one additional, non-threaded section, with an internal wall, with a value of hardness less than one maximum threshold value, presenting a second diameter, which is greater or smaller than the first diameter depending on whether the additional section is located respectively in a mouth position, on the side of the mouth, or the opposite side, in the bottom position, with respect to the first section.

Ainsi, le premier tronçon est librement accessible pour un vissage par un embout d'un premier type, présentant un premier diamètre. Dans un premier cas, pour lequel le tronçon supplémentaire occupe la position d'embouchure, c'est un embout d'un deuxième type, de diamètre supérieur, qui peut être introduit de façon ajustée et même en force, pour effectuer un auto-taraudage du tronçon supplémentaire. Si, par contre, le tronçon supplémentaire occupe la position de fond, le premier tronçon laissera librement passer un embout d'un troisième type, de diamètre plus faible que les deux premiers, pour qu'il puisse se coupler par auto-taraudage avec le tronçon supplémentaire en position de fond.Thus, the first section is freely accessible for screwing by a tip of a first type having a first diameter. In a first case, for which the additional section occupies the mouth position, it is a tip of a second type, of greater diameter, which can be introduced in a controlled manner and even in force, to perform a self-tapping additional section. If, against the additional section occupies the bottom position, the first section will freely pass a tip of a third type, smaller in diameter than the first two, so that it can be coupled by self-tapping with the additional section in the bottom position.

Il peut être prévu un troisième cas, constituant un sur-ensemble des deux premiers, avec donc deux tronçons supplémentaires, respectivement en positions d'embouchure et de fond, permettant ainsi de recevoir trois types d'embouts. Une telle structure d'empilage alterné de tronçons taraudés et de tronçons lisses peut même être prévue au-delà de trois tronçons. Il peut aussi être prévu une suite de tronçons lisses de diamètres décroissants en s'éloignant de l'embouchure.It can be provided a third case, constituting a superset of the first two, with two additional sections, respectively in the mouth and bottom positions, thus receiving three types of tips. Such an alternating stacking structure of threaded sections and smooth sections can even be provided beyond three sections. It can also be provided a series of smooth sections of decreasing diameters away from the mouth.

Un autre avantage procuré par l'invention réside dans le fait que le tronçon supplémentaire est, par essence, compatible avec tout pas de vis puisqu'il est initialement lisse.Another advantage provided by the invention lies in the fact that the additional section is, in essence, compatible with any thread since it is initially smooth.

De préférence, la dite valeur de dureté du tronçon supplémentaire est inférieure à une première valeur de dureté de paroi interne du premier tronçon.Preferably, said hardness value of the additional section is less than a first value of internal wall hardness of the first section.

Le premier tronçon présente ainsi un taraudage de matière moins déformable que celle du tronçon supplémentaire, de sorte que le premier tronçon pourra maintenir efficacement un embout de diamètre correspondant, alors que, s'il s'agit d'un embout destiné à coopérer avec le tronçon supplémentaire, l'auto-taraudage de celui-ci pourra s'effectuer en exerçant un couple de vissage restant limité, puisque la matière de la paroi interne du tronçon supplémentaire est de dureté moindre. Cette caractéristique n'est toutefois pas très gênante pour le maintien efficace de l'embout auto-taraudeur ainsi couplé, car l'auto-taraudage provoque une compression de la matière, surtout dans la zone de fond des gorges entre les filets. Ces zones de fond, maintenues sous pression de contact par les filets de l'embout, sont devenues plus dures et aussi plus denses, et, étant ainsi moins compressibles élastiquement, elles constituent des mâchoires de frein quasi indéformables qui s'opposent donc à tout dévissage et à tout mouvement de basculement de l'embout.The first section thus has a tapping of material less deformable than that of the additional section, so that the first section can effectively maintain a tip of corresponding diameter, while, if it is a tip intended to cooperate with the additional section, the self-tapping of it may be performed by exerting a torque remaining limited, since the material of the inner wall of the additional section is of lesser hardness. This characteristic is however not very troublesome for the effective maintenance of the self-tapping end thus coupled, because the self-tapping causes compression of the material, especially in the bottom zone of the grooves between the threads. These bottom zones, maintained under contact pressure by the threads of the nozzle, have become harder and also denser, and, being thus less elastically compressible, they constitute virtually indeformable brake jaws which therefore oppose any unscrewing and any tilting movement of the tip.

De préférence, la paroi interne du tronçon supplémentaire présente une dureté shore comprise entre 45 et 80, de préférence entre 50 et 70.Preferably, the inner wall of the additional section has a shore hardness of between 45 and 80, preferably between 50 and 70.

Il peut être prévu au moins une fente présentant une certaine longueur axiale selon un axe de la douille, pour que celle-ci constitue un fourreau expansible pour le manche.It can be provided at least one slot having a certain axial length along an axis of the sleeve, so that it constitutes an expandable sleeve for the handle.

La fente, à extension purement radiale ou bien en hélice, limite ainsi la résistance à l'enfoncement de l'embout et autorise donc une pénétration accrue de celui-ci, avec ainsi un meilleur couplage.The slot, with a purely radial extension or in a helix, thus limits the resistance to driving the tip and thus allows increased penetration thereof, with a better coupling.

L'invention concerne aussi un coupleur comprenant une douille pour embase de balai et un embout fileté correspondant, caractérisé par le fait que la douille est conforme à l'invention.The invention also relates to a coupler comprising a socket for a brush base and a corresponding threaded end, characterized in that the bushing is in accordance with the invention.

Avantageusement, l'embout comporte un filetage présentant une valeur de dureté shore supérieure à une valeur shore de dite dureté de paroi interne du tronçon supplémentaire, les dites duretés différant, de préférence, d'au moins quinze unités.Advantageously, the endpiece comprises a thread having a value of hardness shore greater than a shore value of said internal wall hardness of the additional section, said hardnesses differing, preferably, from at least fifteen units.

L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation préférée d'un coupleur comportant un embout et une douille selon l'invention, en référence au dessin annexé, selon lequel :

  • la figure 1 est une vue en direction axiale de la douille, côté embouchure, et
  • la figure 2 est une coupe axiale de la douille de la figure 1 et de l'embout.
The invention will be better understood with the aid of the following description of a preferred embodiment of a coupler comprising a bit and a socket according to the invention, with reference to the appended drawing, in which:
  • the figure 1 is an axial view of the socket, mouth side, and
  • the figure 2 is an axial section of the socket of the figure 1 and the mouthpiece.

Les figures 1 et 2 représentent un coupleur constitué par une douille 1 et un embout fileté 8 à filetage 9, prévu pour être fixé en extrémité d'un manche de balai, comme l'évoque la cavité cylindrique dessinée. La douille 1, de forme globale tubulaire sensiblement cylindrique autour d'un axe géométrique 10, comporte une suite de tronçons constituée, dans l'ordre, par un tronçon d'embouchure 2, un tronçon d'entrée 3 à paroi interne 31 lisse, c'est-à-dire exempt de filets tant qu'un embout 8 de diamètre correspondant n'y a pas été couplé, un tronçon intermédiaire 4 à paroi interne 41 taraudée, et un tronçon de fond 5 à paroi interne 51 lisse.The Figures 1 and 2 represent a coupler consisting of a socket 1 and a threaded end 8 with thread 9, intended to be fixed at the end of a broom handle, as evoked by the cylindrical cavity drawn. The sleeve 1, of substantially cylindrical overall tubular shape about a geometric axis 10, comprises a series of sections constituted, in order, by a mouth portion 2, an inlet portion 3 with a smooth inner wall 31, that is to say, free of threads as long as a tip 8 of corresponding diameter has not been coupled, an intermediate portion 4 internal wall 41 threaded, and a bottom section 5 with internal wall 51 smooth.

Le tronçon d'embouchure 2 comporte un bourrelet annulaire externe 22, ou margelle, constituant une bague de renforcement contre toute force de basculement de l'embout 8. Le tronçon d'embouchure 2 présente une paroi interne 21 limitant un passage cylindrique pour assurer un centrage axial de l'embout 8.The mouth portion 2 comprises an outer annular bead 22, or lip, constituting a reinforcing ring against any tilting force of the tip 8. The mouth portion 2 has an inner wall 21 limiting a cylindrical passage to provide a axial centering of the nozzle 8.

Situé dans le prolongement de la paroi interne 21, le profil latéral de la paroi interne 31 du tronçon d'entrée 3 passe, en allant vers le fond de la douille 1, d'une forme très légèrement conique, dans une plage allant ici de 2 à 6 degrés d'inclinaison de la paroi interne 31 sur l'axe 10, à une forme conique plus marquée, dans ici une plage allant de 20 à 35 degrés de dite inclinaison, pour réduire la section de passage offerte et ainsi provoquer, lors du vissage final d'embout 8 de diamètre correspondant, maximal, un auto-taraudage de plus en plus profond dans la paroi interne 31. Compte tenu de la conicité finale accrue, le couple résistant croissant exercé par le frottement sous pression croissante sur la paroi interne 31 limite la profondeur de pénétration de l'embout 8, qui, ainsi, ne peut atteindre le tronçon intermédiaire 4.Located in the extension of the inner wall 21, the lateral profile of the inner wall 31 of the inlet section 3 passes, going towards the bottom of the sleeve 1, of a very slightly conical shape, in a range going from 2 to 6 degrees of inclination of the inner wall 31 on the axis 10, to a conical shape more marked, in this case a range of 20 to 35 degrees of said inclination, to reduce the passage section offered and thus cause, during the final screwing of tip 8 of corresponding maximum diameter, a self-tapping deeper and deeper in the inner wall 31. Given the increased final conicity, the increasing resistance torque exerted by the friction under increasing pressure on the internal wall 31 limits the depth of penetration of the nozzle 8, which thus can not reach the intermediate section 4.

Le tronçon intermédiaire 4 est prévu pour un embout 8 de diamètre de valeur intermédiaire, à travers librement le tronçon d'entrée 3.The intermediate section 4 is provided for an end piece 8 of intermediate value diameter, freely through the inlet section 3.

Le tronçon de fond 5 présente globalement les mêmes caractéristiques que le tronçon d'entrée 3, la paroi interne 5 étant ici à conicité constante et faible, dans une plage allant ici de 3 à 5 degrés.The bottom section 5 has generally the same characteristics as the inlet section 3, the inner wall 5 being here constant conicity and low, in a range ranging from 3 to 5 degrees.

On notera que les conicités ci-dessus ne représentent qu'une caractéristique annexe, destinée à assurer le serrage radial progressif évoqué plus haut, mais qu'un passage parfaitement cylindrique pourrait de même subir un tel auto-taraudage, la longueur de pénétration de l'embout 8 entraînant par elle-même une croissance de la force de frottement s'opposant à une pénétration excessive.It will be noted that the above-mentioned conicities represent only an additional feature intended to ensure the progressive radial clamping mentioned above, but that a perfectly cylindrical passage could likewise undergo a such self-tapping, the length of penetration of the tip 8 causing by itself a growth of the friction force opposing excessive penetration.

Les parois internes 31, 51 des tronçons d'entrée 3 et de fond 5 présentent une valeur de dureté inférieure à une valeur maximale de seuil, afin de permettre l'auto-taraudage voulu par le filetage 9.The inner walls 31, 51 of the inlet and bottom sections 5 have a value of hardness less than a maximum threshold value, in order to allow the self-tapping desired by the threading 9.

Dans cet exemple, l'ensemble de la douille 1, ici en élastomère à base de polypropylène, et donc en particulier les parois internes à tarauder 31 et 51, présente une dureté shore comprise entre 45 et 80, de préférence entre 50 et 70.In this example, the whole of the sleeve 1, here made of elastomer based on polypropylene, and therefore in particular the inner walls to be tapped 31 and 51, has a Shore hardness of between 45 and 80, preferably between 50 and 70.

Le filetage 9 présente ici une valeur de dureté shore supérieure à la valeur shore de dite dureté de paroi interne 31, 51 des tronçons d'entrée 3 et de fond 5, les dites duretés shore différant ici d'au moins quinze unités.The thread 9 here has a value of shore hardness greater than the shore value of said internal wall hardness 31, 51 of the inlet sections 3 and bottom 5, said shore hardness here differing by at least fifteen units.

Pour faciliter l'exécution d'un auto-taraudage de bonne qualité, il peut être prévu qu'un tronçon axialement arrière de chacune des parois 31 et 51 comporte une ou plusieurs fentes, non dessinées, présentant une certaine extension axiale, c'est-à-dire purement axiales ou bien hélicoïdales, pour ainsi former un manchon radialement expansible afin de limiter la pression radiale sur les filets 21.To facilitate the execution of a self-tapping of good quality, it can be provided that an axially rearward section of each of the walls 31 and 51 comprises one or more slots, not drawn, having a certain axial extension, it is that is to say purely axial or helical, so as to form a radially expandable sleeve in order to limit the radial pressure on the threads 21.

Si la conicité des parois internes 31 et 51 était fixée à une faible valeur, ou si la douille 1 était expansible comme indiqué ci-dessus, on pourrait alors tolérer que le filetage 9 présente une dureté moindre, c'est-à-dire hors des limites indiquées ci-dessus. En effet, dans la mesure où la paroi interne 31 ou 51 n'exerce pas une force axiale de repoussement excessive, qui ferait patiner le filetage 9 et détruirait tout début de taraudage, on peut tolérer un écrasement radial important du filetage 9, et donc une profondeur d'auto-taraudage réduite, dans la mesure où la pression radiale exercée par la paroi interne 31 ou 51 est suffisamment élevée. Le blocage final de l'embout 8 dans la position de pénétration axiale voulue est alors essentiellement assuré par les forces axiales de frottement de la paroi interne 31 ou 51 constituant des mâchoires de frein, alors que les forces axiales de résistance des filets au cisaillement, c'est-à-dire à l'arrachement de l'embout 8, peuvent être limitées.If the conicity of the inner walls 31 and 51 were set to a small value, or if the sleeve 1 was expandable as indicated above, then it could be tolerated that the thread 9 has a lesser hardness, that is to say out limits indicated above. Indeed, insofar as the inner wall 31 or 51 does not exert an axial force of excessive repulsion, which would spin the thread 9 and destroy any beginning of tapping, one can tolerate a significant radial crushing of the thread 9, and thus a depth of self-tapping reduced, insofar as the radial pressure exerted by the inner wall 31 or 51 is sufficiently high. The final blocking of the nozzle 8 in the desired axial penetration position is then essentially ensured by the axial friction forces of the inner wall 31 or 51 constituting brake shoes, whereas the axial forces of resistance of the nets to shear, that is to say, tearing of the tip 8, may be limited.

Claims (10)

Douille de couplage d'une embase de balai à un manche, prévue pour être fixée à l'embase et comportant un premier tronçon taraudé (4), présentant un premier diamètre interne, de couplage avec un embout fileté (8) de manche de balai présentant de même le premier diamètre, reçu par une extrémité d'embouchure (2), caractérisée par le fait que la douille comporte au moins un tronçon supplémentaire (3, 5), non taraudé, à paroi interne (31, 51), à valeur de dureté inférieure à une valeur maximale de seuil, présentant un deuxième diamètre, qui est supérieur ou inférieur au premier diamètre selon que le tronçon supplémentaire (3, 5) est situé respectivement dans une position d'embouchure, du côté de l'embouchure (2), ou bien du côté opposé, en position de fond, par rapport au premier tronçon (3).Coupling sleeve of a mop base with a handle, adapted to be fixed to the base and having a first threaded portion (4), having a first internal diameter, for coupling with a threaded end (8) of a mop handle similarly having the first diameter, received by a mouth end (2), characterized in that the sleeve comprises at least one additional section (3, 5), not tapped, with an inner wall (31, 51), a hardness value less than a maximum threshold value, having a second diameter, which is greater or smaller than the first diameter, depending on whether the additional section (3, 5) is located respectively in a mouth position, on the mouth side (2), or the opposite side, in the bottom position, relative to the first section (3). Douille selon la revendication 1, dans laquelle le tronçon supplémentaire (5) occupe la position de fond.Lampholder according to claim 1, wherein the additional section (5) occupies the bottom position. Douille selon l'une des revendications 1 et 2, dans laquelle la dite valeur de dureté du tronçon supplémentaire (3, 5) est inférieure à une première valeur de dureté de paroi interne du premier tronçon.Lampholder according to one of claims 1 and 2, wherein said hardness value of the additional section (3, 5) is less than a first value of internal wall hardness of the first section. Douille selon la revendication 1, dans laquelle le tronçon supplémentaire occupe la position d'embouchure.Lampholder according to claim 1, wherein the additional section occupies the mouth position. Douille selon l'une des revendications 1 à 4, comportant deux tronçons supplémentaires (3, 5), respectivement en positions d'embouchure et de fond.Bushing according to one of claims 1 to 4, comprising two additional sections (3, 5), respectively in mouth and bottom positions. Douille selon l'une des revendications 1 à 5, dans laquelle la paroi interne du tronçon supplémentaire (3, 5) présente une dureté shore comprise entre 45 et 80, de préférence entre 50 et 70.Bushing according to one of claims 1 to 5, wherein the inner wall of the additional section (3, 5) has a Shore hardness between 45 and 80, preferably between 50 and 70. Douille selon l'une des revendications 1 à 6, dans laquelle il est prévu au moins une fente présentant une certaine longueur axiale selon un axe de la douille, pour que celle-ci constitue un fourreau expansible pour le manche.Socket according to one of claims 1 to 6, wherein there is provided at least one slot having a certain axial length along an axis of the sleeve, so that it constitutes an expandable sleeve for the handle. Coupleur comprenant une douille (1) pour embase de balai et un embout fileté (8) correspondant, caractérisé par le fait que la douille est de type selon l'une des revendications 1 à 7.Coupler comprising a socket (1) for a brush base and a corresponding threaded end (8), characterized in that the bushing is of the type according to one of Claims 1 to 7. Coupleur selon la revendication 8, dans lequel l'embout (8) comporte un filetage (9) présentant une valeur de dureté shore supérieure à une valeur shore de dite dureté de paroi interne (31, 51) du tronçon supplémentaire (3, 5).Coupler according to Claim 8, in which the end piece (8) has a thread (9) having a Shore hardness value greater than a shore value of said internal wall hardness (31, 51) of the additional section (3, 5). . Coupleur selon la revendication 9, dans lequel les dites duretés shore diffèrent d'au moins quinze unités.The coupler of claim 9, wherein said shore hardnesses differ by at least fifteen units.
EP07290559A 2007-05-04 2007-05-04 Bushing for coupling a broom head with the broom handle Withdrawn EP1987928A1 (en)

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EP07290559A EP1987928A1 (en) 2007-05-04 2007-05-04 Bushing for coupling a broom head with the broom handle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004134A1 (en) * 2013-04-08 2014-10-10 Christiane Bousquet TIP DEVICE FOR HANDLES, ESPECIALLY FOR BROOM AND ARATORY OBJECT

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GB228505A (en) * 1924-01-30 1925-02-19 Ture Gustaf Rennerfelt Improvements in and relating to self-locking nuts
GB288902A (en) * 1927-09-27 1928-04-19 Francis Constant Moreau An improved means or device for attaching handles to broom and brush heads
US2788829A (en) * 1955-05-04 1957-04-16 Illinois Tool Works Plastic nut having frusto-conical bore and locking portion
US3001567A (en) * 1955-10-06 1961-09-26 Adelaide E Brill Self-locking and self-sealing plastic fastening devices
US4541139A (en) * 1983-06-03 1985-09-17 The Drackett Company Broom shroud
US4642837A (en) * 1985-08-20 1987-02-17 The Drackett Company Broom having interlocking components
US4684283A (en) * 1986-06-23 1987-08-04 The Drackett Company Handle socket adapter
US4763377A (en) * 1986-10-21 1988-08-16 Flo-Pac Corporation Swiveling scrub brush
DE8501040U1 (en) * 1985-01-17 1988-09-29 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
US5210898A (en) * 1989-08-11 1993-05-18 Vining Industries, Inc. Wooden broom assembly and adapter means therefor
FR2799149A1 (en) * 1999-10-01 2001-04-06 Moerman Nv Connector, for fitting tool to handle, consists of linking element, which carries projecting lug located on lower edge of fitting ring, provided as part of tool
US20050015905A1 (en) * 2003-07-03 2005-01-27 Freudenberg Household Products Lp Broom, method, and broom display

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB228505A (en) * 1924-01-30 1925-02-19 Ture Gustaf Rennerfelt Improvements in and relating to self-locking nuts
GB288902A (en) * 1927-09-27 1928-04-19 Francis Constant Moreau An improved means or device for attaching handles to broom and brush heads
US2788829A (en) * 1955-05-04 1957-04-16 Illinois Tool Works Plastic nut having frusto-conical bore and locking portion
US3001567A (en) * 1955-10-06 1961-09-26 Adelaide E Brill Self-locking and self-sealing plastic fastening devices
US4541139A (en) * 1983-06-03 1985-09-17 The Drackett Company Broom shroud
DE8501040U1 (en) * 1985-01-17 1988-09-29 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
US4642837A (en) * 1985-08-20 1987-02-17 The Drackett Company Broom having interlocking components
US4684283A (en) * 1986-06-23 1987-08-04 The Drackett Company Handle socket adapter
US4763377A (en) * 1986-10-21 1988-08-16 Flo-Pac Corporation Swiveling scrub brush
US5210898A (en) * 1989-08-11 1993-05-18 Vining Industries, Inc. Wooden broom assembly and adapter means therefor
FR2799149A1 (en) * 1999-10-01 2001-04-06 Moerman Nv Connector, for fitting tool to handle, consists of linking element, which carries projecting lug located on lower edge of fitting ring, provided as part of tool
US20050015905A1 (en) * 2003-07-03 2005-01-27 Freudenberg Household Products Lp Broom, method, and broom display

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004134A1 (en) * 2013-04-08 2014-10-10 Christiane Bousquet TIP DEVICE FOR HANDLES, ESPECIALLY FOR BROOM AND ARATORY OBJECT

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