EP0031150A1 - Manche d'outil avec dispositif de fixation - Google Patents

Manche d'outil avec dispositif de fixation Download PDF

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Publication number
EP0031150A1
EP0031150A1 EP80108031A EP80108031A EP0031150A1 EP 0031150 A1 EP0031150 A1 EP 0031150A1 EP 80108031 A EP80108031 A EP 80108031A EP 80108031 A EP80108031 A EP 80108031A EP 0031150 A1 EP0031150 A1 EP 0031150A1
Authority
EP
European Patent Office
Prior art keywords
cone
stem
sleeve
conical
tool handle
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
EP80108031A
Other languages
German (de)
English (en)
Other versions
EP0031150B1 (fr
Inventor
Walter Kolb
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.)
Wolf Geraete GmbH
Original Assignee
Wolf Geraete GmbH
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 Wolf Geraete GmbH filed Critical Wolf Geraete GmbH
Priority to AT80108031T priority Critical patent/ATE2822T1/de
Publication of EP0031150A1 publication Critical patent/EP0031150A1/fr
Application granted granted Critical
Publication of EP0031150B1 publication Critical patent/EP0031150B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 invention relates to a device handle with a adapted to the conical grommet of a household or garden device, releasable fastening device which has a stem cone fixed at the stem end with an external thread and a conical sleeve which can be screwed onto it with an internal thread and which can be radially expanded within the conical grommet.
  • Such a handle attachment for home and garden tools is known from DE-GMS 77 13 248.
  • Such a handle attachment ensures a secure friction fit and simple handling, and if necessary a removal of the tool fastened via a conical sleeve and an attachment to the grommet of another tool can be effected quickly and conveniently.
  • the plastic material used for the individual parts of the fastening device ensures a secure friction fit, so that no form-fitting anchoring is required.
  • loosening of the handle attachment could occur after prolonged use if the plastic material tends to flow and under the crush stress escapes radially inwards.
  • the fastening device could break through if, for example, a tillage device was hammered into the floor with great force.
  • the invention is therefore based on the object of providing a handle with a fastening device which, with convenient, simple and quick operation, ensures a permanently tight fit and is secured against breaking off.
  • the stem cone which is integrally molded from plastic as a sleeve body together with the rear plug section, has an inner reinforcing insert.
  • the reinforcing insert which preferably consists of a steel tube or a solid metal core, ensures a radially rigid support to the outside, so that the material cannot flow and the firm frictional fit is ensured both within the grommet and within the handle.
  • the reinforcing insert which is preferably injected into the plastic body, also expediently increases the bending strength at the critical point, because during processing the highest bending moment occurs at the transition between the end of the handle and Fastening device on.
  • the metallic insert not only increases the bending moment but also creates the possibility that after a kink due to an excessive bending moment load further use of the device or the handle of the device becomes possible because the fastening device bent as a result of the overload can be bent relatively easily straight again, because the steel tube insert or a solid core can be bent back, and with it the plastic jacket.
  • the invention accordingly ensures that the fastening device is secured against kinking and that an increased and permanent hold is ensured both in the stem end and in the conical sleeve.
  • the fastening device is expediently supplied in connection with a tubular stem, because the fastening device can be fixed more securely on the pipe, because the plug can be designed in such a way that it can only be driven in with high force, and then also has the required pull-out force .
  • it is reserved for the invention to provide fastening devices of the type described also independently of the handle and to leave it up to the user to drive the fastening device into a handle tube, to glue it in or to permanently secure it to a handle in some other way.
  • the stem consists of a tube 10 made of aluminum, on which a plastic tube 12 is drawn in the upper part, and which carries a hanging cap 14 at the upper end.
  • the fastening device 16 has a sleeve injection-molded from plastic, which with its rear outer circle of cylindrical plug section 18 is permanently hammered into the lower end of the tube 10.
  • This plug section 18 ends in an annular groove 20, which is adjoined by a collar 22 which abuts the end ring end face of the tube 10 and has essentially the same outer diameter as the tube.
  • the plastic sleeve extends forwards from the collar 22 in a stem cone 24, which is provided with an external thread over its entire axial length.
  • the inside of the sleeve carries a tubular steel insert 26 which extends from the stem cone 24 into the plug section 18.
  • This steel tube insert 26 is injected into the sleeve 24, 18 and has holes 28 into which the plastic of the sleeve can flow when sprayed, so that an immovable fit is ensured.
  • the steel bearing tube 26 ends before the front end of the stem cone 24, but has an extension 30 which protrudes up to the end face of the conical sleeve 24 and which serves for centering and spacing when spraying.
  • a cone sleeve 32 which is provided with an internal thread over the entire length and is unslotted, is screwed onto the stem cone 24 stretchable plastic material, which is preferably elastic.
  • the shaft 34 of a retaining bolt passes through, the head 36 of which can be supported on the inside of the cover wall of the expansion cone 24, and on its end protruding from the cone sleeve 32, a pressed-on cap 38 is worn, whereby the Cone sleeve 32 is captively connected to the stem cone 24, since this limits the unscrewing of the cone sleeve 32.
  • the fastening device is expediently supplied together with the handle of the device and the diameter of the plug section 18 is dimensioned such that a secure, captive fit is ensured after the impact over the gripped section 40. This tight fit is ensured by the insert tube 26 which prevents the plastic from being deformed further radially inwards than is necessary to drive in the plug section.
  • the steel bearing tube 26 prevents the stem cone sleeve 24 from being pressed together radially when the cone sleeve is screwed on or when the stem cone 24 is screwed into the cone sleeve 32 inserted into the conical grommet of a domestic or gardening tool Screwing the stem cone 24 into the cone sleeve 32 moves it backwards on the fastening device and spreads outward against the device grommet, from the inside there is a rigid support by the insert tube 26 and a permanent fit is ensured, which can, however, be solved by removing the device grommet from the stem cone 24 with the cone sleeve 32 which it frictionally entrained unscrewed, whereby the wedging is canceled.
  • the steel tube insert 26 not only ensures a secure and permanent fit of the device grommet on the stem, but it also prevents the fastening device from breaking under stress between the device grommet and the stem tube end.
  • the insert tube itself can consist of a conically rolled steel band.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP80108031A 1979-12-21 1980-12-18 Manche d'outil avec dispositif de fixation Expired EP0031150B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80108031T ATE2822T1 (de) 1979-12-21 1980-12-18 Geraetestiel mit befestigungsvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2951872 1979-12-21
DE2951872A DE2951872C2 (de) 1979-12-21 1979-12-21 Stielbefestigung für Haus- und Gartengeräte

Publications (2)

Publication Number Publication Date
EP0031150A1 true EP0031150A1 (fr) 1981-07-01
EP0031150B1 EP0031150B1 (fr) 1983-03-23

Family

ID=6089332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80108031A Expired EP0031150B1 (fr) 1979-12-21 1980-12-18 Manche d'outil avec dispositif de fixation

Country Status (3)

Country Link
EP (1) EP0031150B1 (fr)
AT (1) ATE2822T1 (fr)
DE (1) DE2951872C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996037356A1 (fr) * 1995-05-24 1996-11-28 Merz & Krell Gmbh & Co. Production de sections de manchon assemblees amovibles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437716C2 (de) * 1994-10-21 1996-10-17 Eppendorf Geraetebau Netheler Repetierpipette

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7713248U1 (de) * 1977-04-27 1977-08-04 Wolf-Geraete Gmbh, 5240 Betzdorf Stielbefestigung fuer haus- und gartengeraete

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1871198U (de) * 1962-10-19 1963-04-25 Hoechst Ag Stiel fuer hammer, axt oder beil, aus kunststoff.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7713248U1 (de) * 1977-04-27 1977-08-04 Wolf-Geraete Gmbh, 5240 Betzdorf Stielbefestigung fuer haus- und gartengeraete

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996037356A1 (fr) * 1995-05-24 1996-11-28 Merz & Krell Gmbh & Co. Production de sections de manchon assemblees amovibles
US6213666B1 (en) 1995-05-24 2001-04-10 Merz & Krell Gmbh & Co. Production of releasable sleeve sections
EP1151838A2 (fr) * 1995-05-24 2001-11-07 Merz & Krell GmbH & Co. Démoulage de manchons pour les instruments d'écriture
EP1151838A3 (fr) * 1995-05-24 2002-07-17 Merz & Krell GmbH & Co. Démoulage de manchons pour les instruments d'écriture

Also Published As

Publication number Publication date
EP0031150B1 (fr) 1983-03-23
DE2951872C2 (de) 1983-01-27
ATE2822T1 (de) 1983-04-15
DE2951872A1 (de) 1981-07-02

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