FR2717729A1 - Device for fixing a handle on the body of a tool. - Google Patents

Abstract

The invention relates to a device for fixing a handle to the body of a tool comprising a tubular sleeve, in which the end of the handle fits, which fixing device being made from a blank of metal locally shaped by rolling beyond a plate (6) to obtain a tubular sleeve by bringing the edges (7, 8) of the part of the blank thus rolled together. This device is characterized in that each of the two opposite edges (7, 8) of the tubular sleeve has at least a fraction (9, 10) of a locking key which, by form cooperation, prevents said edges (7, 8) to move away in a direction tangent to said edges.

Description

The invention relates to a device for fixing a

  handle on the body of a tool, such as a broom or squeegee.

  Conventionally, such a fixing device comprises: a tubular sleeve in which the end of the handle fits, means for locking the handle in the sleeve and means for associating the sleeve with the body of the tool . There are several methods to obtain these devices

of fixation.

  For the record, for example,

  fixation obtained by molding a plastic material.

  The invention is more specifically concerned with fastening devices which are not obtained by molding and in particular the

metal devices.

  FR-A-2 1447 375) is known of a fastening device consisting of a section of tube that is flattened at one of its ends and then folded to form a plate bearing on

  the back of a brush to form a broom.

  Such a device is relatively simple to implement but

  the tube used being a semi-finished product is quite expensive.

  In addition, as the width of the plate depends on the section of the tube, if this platen is sufficient for small tools, it does not provide a sufficiently stable support

for larger tools.

  It is also known (FR-A-2.147.374) a fixing device comprising a tube section fixed by cords of

  welding on a platen of appropriate dimensions.

  If this device remedies the problem mentioned above, it is even more expensive because of the welding operation

  necessary to assemble the two parts.

  It is also necessary that the thickness of the tube and the plate is sufficient so that the parts are easily weldable. There is also known a fastening device formed from a metal blank shaped by localized deformation for

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  beyond a platen to form a tubular sleeve by rolling

  and local approximation of the edges of the blank.

  This solution is interesting because the sheet is less expensive than the tube and, to change the size of the plate, simply change the size of the corresponding portion of the blank. This type of device however has a disadvantage: it is not possible to maintain the handle in the sleeve only by the adjustment related to the difference in diameter between that of the handle and that inside the sleeve because under the effect of the stress the edges of the tubular part of the

room are moving away.

  Finally, there is still known (FR-A-2,208,764) a device of the aforementioned type for which the edges of the tubular part are

welded together.

  If this solution makes it possible to jam the handle in the socket, it requires an additional manufacturing step

  and a cost increased by that of this welding.

  One of the results that the invention aims to obtain is a fixing device of the type mentioned above that overcomes these disadvantages. For this purpose, the invention relates to such a device in particular characterized in that each of the two edges facing the tubular sleeve has at least a fraction of a locking key which, by form cooperation, prohibits said edges to move away in a direction tangent to said edges.

  The invention will be well understood from the description

  BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1: a view from below of a broom, FIG. 2 is a view of a detail of FIG.

  FIG. 3: a developed view of a fixing device

  tion. Referring to the drawing, we see that, to fix a handle 2 to a tool 1, such as a squeegee or a broom, we make

  call to a fixing device 3.

  Conventionally, such a fixing device comprises:

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  a tubular sleeve 4, into which the end of the handle fits, means 5 for locking the handle 2 in the sleeve and means for associating the sleeve with the body of the tool. In a conventional manner, this fastening device is made from a metal blank which is roll-shaped locally beyond a plate 6 to obtain a tubular sleeve by bringing the edges 7, 8 of the part of the blank closer together.

thus rolled.

  The plate 6 is associated with the body of the tool by any known means compatible with the material of the tool, such as

  rivets or spot welds etc ...

  According to the invention, each of the two edges 7, 8 opposite the tubular sleeve has at least a fraction 9, 10 of a locking key 11 which, by form cooperation, prohibits said edges 7, 8 of 'move in one direction

tangent to said edges.

  In a preferred embodiment of the invention: - one of the edges facing the tubular sleeve comprises at least one notch 10 of predetermined shape and - the other edge has opposite this cut a tab 9 of complementary shape to said cut, the tab 9 and cutout 10 being designed to allow the tab 9 to engage in cutting that according to a

  direction substantially orthogonal to this cut.

  For example, the cut and the leg will have a shape in

dovetail.

  This is interesting because when the machine rolls the metal to form the tubular sleeve, it automatically places the tab in the cutout and so

  lock the edges of the sleeve without further operation.

  Preferably, the sleeve has inside ribs 12 longitudinally distributed angularly on the inner periphery of the sleeve and, in the thickness of these ribs 12, the sleeve is tapped to allow also

  to anchor a handle made of soft material.

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Claims (4)

  1. A device for fixing a handle on the body of a tool comprising: - a tubular sleeve (4), into which the end of the handle fits, means (5) for locking the handle (2) in the sleeve and means for associating the sleeve with the body of the tool, which fastening device is made from a metal blank locally rolled for beyond a plate (6) to obtain a tubular sleeve by approaching the edges (7, 8) of the portion of the blank thus rolled, this device being CHARACTERIZED in that each of the two edges (7, 8) opposite the tubular sleeve has at least one fraction (9 10) of a locking key (11) which, by form cooperation, prevents said edges (7, 8) from   to move in a direction tangent to said edges.   2. Device according to claim i characterized in that: - one of the edges facing the tubular sleeve comprises at least one notch (10) of predetermined shape and - the other edge has opposite this cut a lug (9) complementary shape to said cut, the tab (9) and cutout (10) being designed to allow the lug (9) to engage in cutting that according to   a direction substantially orthogonal to this cut.   3. Device according to claim 2 characterized in that the cutout (10) and the tab (9) have a shape dovetail. 4. Device according to claim 1 characterized in that the sleeve has inside ribs (12) longitudinally distributed angularly on the inner periphery of the sleeve and, in the thickness of these ribs (12),   the sleeve is threaded to allow anchoring a handle.