EP0473894A1 - Etançon à filetage - Google Patents

Etançon à filetage Download PDF

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Publication number
EP0473894A1
EP0473894A1 EP91110718A EP91110718A EP0473894A1 EP 0473894 A1 EP0473894 A1 EP 0473894A1 EP 91110718 A EP91110718 A EP 91110718A EP 91110718 A EP91110718 A EP 91110718A EP 0473894 A1 EP0473894 A1 EP 0473894A1
Authority
EP
European Patent Office
Prior art keywords
thread
inner tube
spindle support
wall thickness
approximately
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
EP91110718A
Other languages
German (de)
English (en)
Other versions
EP0473894B1 (fr
Inventor
Ernst-Friedrich Dipl.-Ing. Ischebeck
Jochen Isenberg
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.)
Friedr Ischebeck GmbH
Original Assignee
Friedr Ischebeck 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 Friedr Ischebeck GmbH filed Critical Friedr Ischebeck GmbH
Publication of EP0473894A1 publication Critical patent/EP0473894A1/fr
Application granted granted Critical
Publication of EP0473894B1 publication Critical patent/EP0473894B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G2025/042—Shores or struts; Chocks telescopic with devices to avoid accidental disengagement of the telescopic elements, e.g. during transport

Definitions

  • the invention relates to a spindle support consisting of two telescopically displaceable tubes with a thread formed on an inner tube, on which an adjusting nut runs, the thread being rolled up.
  • Spindle supports designed in this way are known from practice, an inner tube having a long external thread and a nut running thereon, suitably a so-called swivel nut, being provided.
  • the length of the spindle support is adjusted via the thread.
  • a double-start trapezoidal or round thread is usually used.
  • efforts are made to match the bending resistance of the outer and inner tubes so that they are approximately the same.
  • the lowest possible weight should be achieved with the lowest possible weight.
  • the inner tube basically has a lower moment of resistance to bending due to its smaller diameter, a different material characteristic with regard to the permissible yield stress is used to compensate for the strength of the inner tube.
  • the permissible yield stress can be achieved either by using a material with a higher overall strength or by strain hardening during thread rolling.
  • a material with a higher overall strength or by strain hardening during thread rolling.
  • the object of the invention is to provide a spindle support with the features assumed at the outset, which is designed to be more user-friendly with the same strength of the inner and outer tube.
  • This object is achieved in the invention specified in claim 1.
  • it is based on the fact that when the thread flanks are opened at an angle of approximately 80-90, a thread depth is approximately equal to the remaining wall thickness in the thread base. A very good utilization of the material is hereby achieved.
  • the projected thread surface, the thread depth corresponds approximately to the load-bearing cross-section, the remaining wall thickness.
  • the thread formation also proves to be surprisingly advantageous with regard to soiling, in particular concrete soiling.
  • the thread lead angle is advantageously at the limit of self-locking no further inhibiting element or the like is required to secure the vertebral nut.
  • the given conditions also make it possible for the inner tube to consist of a common structural steel, for example an ST 37.
  • an ST 37-2 is preferably used here.
  • the spindle support provided as a whole with the number 1 has an outer tube 2 and an inner tube 3.
  • the lower front end of the outer tube 2 is equipped with a base plate 4, while the end of the inner tube 3 protruding from the outer tube 2 carries a head plate 5 on the end face.
  • the outer tube 2 is provided on the outer wall side with four beads 6 arranged at the same distance from one another.
  • the elevations of the beads 6 on the inside wall serve as an end stop for the inner tube 3.
  • the inner tube 3, which is displaceably arranged in the outer tube 2, has approximately the same length as the outer tube 2. Starting from the top plate 5, an external thread 7 extends into the lower quarter of the inner tube 3. In its lower end region, the inner tube 3 is used to form a tube Stop shoulder 8 expanded.
  • the inner tube 3 is made of mild steel ST 37-2 and has very thin walls, the ratio of diameter to wall thickness being approximately 18.
  • the external thread 7 is rolled onto the inner tube 3.
  • it is a double-start, trapezoidal thread, the opening angle alpha of the thread valley being approximately 90 ° (cf. FIG. 3).
  • the thread 7 is designed so that the residual wall thickness a in the thread base 9 is approximately equal to the wall thickness of the outlet pipe.
  • the lead angle of the thread 7 is at the limit of self-locking of approximately 6 °.
  • the inner wall of the inner tube 3 is deformed in a wave-like manner by the thread rolling, the wave crest of the thread base 9 and the wave trough of the thread head 10 being opposite.
  • the thread depth t is approximately equal to the residual wall thickness a in the thread root 9.
  • the width b of the thread head 10 corresponds approximately to one and a half times the wall thickness a. An optimal load-bearing capacity is thus achieved overall. Not only is the thread depth equal to the remaining wall thickness in the thread base.
  • the shear surface of the thread flank is also matched to the surface pressure of the thread flank.
  • the length of the entire spindle support 1 is adjusted by means of a swivel nut 11. This rests on the upper end of the outer tube 2 and is supported against tipping over radial webs 12 which are supported on the outer wall of the outer tube 2. Diametrically opposed handles 13 arranged on the lateral surface of the vertebral nut 11 serve to facilitate rotation of the vertebral nut 11.
  • the swivel nut 11 is rotated, the inner tube 3 moving out of or into the outer tube 2.
  • the maximum length of the spindle support 1 is defined as shown in Figure 4.
  • the stop shoulder 8 of the inner tube 3 is supported on the stop webs formed by the beads 6 of the outer tube 2. A further unscrewing of the inner tube 3 is not possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Prostheses (AREA)
  • Fluid-Damping Devices (AREA)
  • Sliding-Contact Bearings (AREA)
  • Toys (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Surgical Instruments (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
EP91110718A 1990-09-01 1991-06-28 Etançon à filetage Expired - Lifetime EP0473894B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4027739 1990-09-01
DE4027739A DE4027739C1 (fr) 1990-09-01 1990-09-01

Publications (2)

Publication Number Publication Date
EP0473894A1 true EP0473894A1 (fr) 1992-03-11
EP0473894B1 EP0473894B1 (fr) 1994-11-30

Family

ID=6413392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110718A Expired - Lifetime EP0473894B1 (fr) 1990-09-01 1991-06-28 Etançon à filetage

Country Status (5)

Country Link
EP (1) EP0473894B1 (fr)
AT (1) ATE114771T1 (fr)
DE (2) DE4027739C1 (fr)
DK (1) DK0473894T3 (fr)
ES (1) ES2064815T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720429A1 (fr) * 1994-05-31 1995-12-01 Travaux Ste Moderne Grands Garde-corps pour fermer provisoirement une baie d'un bâtiment.
DE10132253A1 (de) * 2001-07-04 2003-01-23 Doka Ind Gmbh Amstetten Rohr einer höhenverstellbaren Stütze sowie höhenverstellbare Stütze
WO2004003317A1 (fr) 2002-06-26 2004-01-08 Peri Gmbh Etais conçus pour le domaine de la construction

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2304901B1 (es) * 2008-04-09 2009-05-21 Sistemas Tecnicos De Encofrados, S.A. Puntal para obras.
DE102016204694A1 (de) * 2016-03-22 2017-09-28 Peri Gmbh Gerüstelement mit einem Trägerkopf und Baugerüst mit einem solchen Gerüstelement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1310595A (fr) * 1961-10-16 1962-11-30 Perfectionnements aux étais réglables pour coffrages et analogues
DE3445657A1 (de) * 1984-12-14 1986-06-26 Friedr. Ischebeck GmbH, 5828 Ennepetal Baustuetze

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1310595A (fr) * 1961-10-16 1962-11-30 Perfectionnements aux étais réglables pour coffrages et analogues
DE3445657A1 (de) * 1984-12-14 1986-06-26 Friedr. Ischebeck GmbH, 5828 Ennepetal Baustuetze

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720429A1 (fr) * 1994-05-31 1995-12-01 Travaux Ste Moderne Grands Garde-corps pour fermer provisoirement une baie d'un bâtiment.
DE10132253A1 (de) * 2001-07-04 2003-01-23 Doka Ind Gmbh Amstetten Rohr einer höhenverstellbaren Stütze sowie höhenverstellbare Stütze
DE10132253B4 (de) * 2001-07-04 2005-10-27 Doka Industrie Gmbh Außen- oder Ständerrohr einer axial verstellbaren Vorrichtung sowie höhenverstellbare Stütze
WO2004003317A1 (fr) 2002-06-26 2004-01-08 Peri Gmbh Etais conçus pour le domaine de la construction

Also Published As

Publication number Publication date
ES2064815T3 (es) 1995-02-01
DE59103653D1 (de) 1995-01-12
EP0473894B1 (fr) 1994-11-30
DK0473894T3 (da) 1995-05-08
ATE114771T1 (de) 1994-12-15
DE4027739C1 (fr) 1991-10-24

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