WO2003033839A1 - Telescopic support, particularly for building use - Google Patents

Telescopic support, particularly for building use Download PDF

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Publication number
WO2003033839A1
WO2003033839A1 PCT/IT2002/000663 IT0200663W WO03033839A1 WO 2003033839 A1 WO2003033839 A1 WO 2003033839A1 IT 0200663 W IT0200663 W IT 0200663W WO 03033839 A1 WO03033839 A1 WO 03033839A1
Authority
WO
WIPO (PCT)
Prior art keywords
support according
corrugations
ieast
telescopic support
safety
Prior art date
Application number
PCT/IT2002/000663
Other languages
French (fr)
Inventor
Guido Faresin
Original Assignee
Faresin S.P.A.
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 Faresin S.P.A. filed Critical Faresin S.P.A.
Priority to HU0401848A priority Critical patent/HU224892B1/en
Priority to DE60202792T priority patent/DE60202792T2/en
Priority to AT02788518T priority patent/ATE288005T1/en
Priority to EP02788518A priority patent/EP1436472B1/en
Publication of WO2003033839A1 publication Critical patent/WO2003033839A1/en

Links

Classifications

    • 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 subject of the present invention is a telescopic support, particularly for building use, of the type including the features set out in the preamble to the main claim.
  • This support is subject to combined bending and compressive stress of the elements of which it is composed.
  • the inner element which is necessarily of smaller dimensions so that it can be fitted inside the outer element, is the element which is subject to the most critical stress.
  • the first and most widespread arrangement is that of making the inner element of a different and stronger, although heavier, material than that used for the construction of the outer element.
  • the outer element is made of aluminium alloy and the inner element is made of steel.
  • the main task of the invention is to provide a support, particularly for building works, which is designed structurally and functionally to overcome the disadvantages discussed with reference to the prior art mentioned.
  • An important object of the present invention is to provide a telescopic support in which the problems of wear connected with adjustment with ring nuts are prevented.
  • Yet another object is to provide a support with a structure such that problems of slipping-out are prevented.
  • Yet another object is that of providing a support having a simple structure.
  • One of the main objects is to provide an inexpensive telescopic support structure.
  • Figure 1 shows, in a perspective view, a telescopic support, particularly for building use, with a structure according to the invention
  • Figure 2 shows a portion of a support according to the invention in longitudinal section
  • Figure 3 shows the support of the previous drawings in cross-section.
  • a telescopic support particularly for building works, with a structure according to the invention, is generally indicated 10.
  • the support 10 comprises an inner tubular element 11, slidable telescopically in an outer tubular element 12.
  • the elements 11 and 12 are provided with shaped support plates 13 at their ends.
  • the inner element 11 is made of extruded aluminium alloy and has, in cross-section, a series of recurring corrugations extending substantially continuously longitudinally and distributed at regular intervals around both its inner periphery and its outer periphery.
  • the resisting cross-section which is subject to compression stress is thus increased and a stiffening of the inner element of the support, which increases its strength, is also achieved.
  • the corrugations have an approximately sinusoidal shape with respect to a median circle of the element 11 and portions of screw thread are formed on at
  • the corrugations define a plurality of first re-entrant portions 14 arranged circumferentially at intervals of 45° and an outer profile having longitudinal recesses 15 which define ridges or first projections 16, also spaced apart circumferentially by 45°.
  • the outer corrugations may be formed by milling and, in this case, the inner tubular element is initially provided with a continuous external screw thread which is subsequently milled to produce longitudinal recesses 15 as indicated above.
  • the outer tubular element 12 also has a shaped cross-section with an inner profile defining second projections and second re-entrant portions, 18 and 19, respectively.
  • a thread sector of one first projection 16 is removed, for example, by a mechanical flattening process, so as to produce a flat and slightly recessed surface 16a.
  • clamping means which can lock the relative sliding of the elements in at
  • the shaped plate 21 is made of tough metal to prevent problems of wear of the bearing surface between the plate 21 and the ring nut 20 owing mutual friction during extension-adjustment operations.
  • the assembly constituted by the inner element 11 and by the ring nut 20 is clamped in the desired position by a spring hook 22 which is articulated to the top of the element 12 and engages on a lower flange 23 of the ring nut 20.
  • a plate 27 suitable for forming a catch for the pawl 25 is fixed in the second re-entrant portion 19a, in the vicinity of the upper end of the outer element
  • the pawl 25 and the plate 27 ensure both that it is completely impossible for the inner element 11 to slip out of the outer element, and that a portion 28 of the inner element 11 is inserted in the outer element 12, thus ensuring the stability of the assembly in use.
  • the inner and outer elements 11 and 12 may be made of aluminium alloy or of another light alloy.
  • the present invention has been found in practice to have led to the achievement of the objects proposed.
  • a support structure is provided which prevents problems of wear connected with the operation to adjust the relative extension of the inner and outer elements.
  • the support 10 solves the problem of slipping of the inner element 11 out of the outer element 12 as well as setting-up problems with regard to reduced stability should the support 10 be used with the element 11 extending too far from the outer element 12; the portions of the two tubular elements which interact are thus sufficient to ensure the equilibrium and stability of the assembly with respect to the vertical axis.
  • the structure is simple and inexpensive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Tents Or Canopies (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Clamps And Clips (AREA)
  • Ladders (AREA)

Abstract

A telescopic support (10), particularly for building use, comprises at least two tubular elements, that is, an outer element (12) and an inner element (11), slidable telescopically one inside the other, and clamping means (20) for locking the relative sliding of the elements in at least one of the directions of sliding. The inner element (11) has, in cross-section, a series of recurring corrugations extending substantially continuously longitudinally and distributed at regular intervals around its circumference.

Description

TELESCOPIC SUPPORT, PARTICULARLY FOR BUILDING USE
1
DESCRIPTION Technical field of the invention
The subject of the present invention is a telescopic support, particularly for building use, of the type including the features set out in the preamble to the main claim.
Technological background
A support with these features is known from EP 553666.
This support, like other similar devices formed in accordance with the prior art, is subject to combined bending and compressive stress of the elements of which it is composed. Of these, the inner element, which is necessarily of smaller dimensions so that it can be fitted inside the outer element, is the element which is subject to the most critical stress.
Various arrangements have been developed to ensure the strength of the inner element.
The first and most widespread arrangement is that of making the inner element of a different and stronger, although heavier, material than that used for the construction of the outer element. Typically, the outer element is made of aluminium alloy and the inner element is made of steel. Moreover, it is usual to make the inner element considerably shorter than the outer element.
Although, on the one hand, all of these arrangements favour the strength of the support, even though it is subjected to large loads, on the other hand, they compromise its weight, manoeuvrability, and suitability for large longitudinal adjustments, as well as its ability, as a whole, to withstand combined bending and compressive stress. Description of the invention
The main task of the invention is to provide a support, particularly for building works, which is designed structurally and functionally to overcome the disadvantages discussed with reference to the prior art mentioned. An important object of the present invention is to provide a telescopic support in which the problems of wear connected with adjustment with ring nuts are prevented. Yet another object is to provide a support with a structure such that problems of slipping-out are prevented.
Yet another object is that of providing a support having a simple structure.
One of the main objects is to provide an inexpensive telescopic support structure.
The main task, the objects set out, and others which will become clearer from the following, are achieved by a telescopic support, particularly for building use, formed in accordance with the appended claims.
Brief description of the drawings
Further characteristics and advantages of the invention will become clearer from the description of a preferred but not exclusive embodiment thereof, indicated by way of non-limiting example with reference to the drawings, in which:
Figure 1 shows, in a perspective view, a telescopic support, particularly for building use, with a structure according to the invention,
Figure 2 shows a portion of a support according to the invention in longitudinal section, and
Figure 3 shows the support of the previous drawings in cross-section.
Preferred embodiment of the invention
With particular reference to the drawings described above, a telescopic support, particularly for building works, with a structure according to the invention, is generally indicated 10.
The support 10 comprises an inner tubular element 11, slidable telescopically in an outer tubular element 12. The elements 11 and 12 are provided with shaped support plates 13 at their ends.
As can be seen in Figure 3, the inner element 11 is made of extruded aluminium alloy and has, in cross-section, a series of recurring corrugations extending substantially continuously longitudinally and distributed at regular intervals around both its inner periphery and its outer periphery. The resisting cross-section which is subject to compression stress is thus increased and a stiffening of the inner element of the support, which increases its strength, is also achieved. The corrugations have an approximately sinusoidal shape with respect to a median circle of the element 11 and portions of screw thread are formed on at
Ieast some of the outer ridges, so as to form a plurality of thread sectors 17.
The corrugations define a plurality of first re-entrant portions 14 arranged circumferentially at intervals of 45° and an outer profile having longitudinal recesses 15 which define ridges or first projections 16, also spaced apart circumferentially by 45°.
Alternatively, the outer corrugations may be formed by milling and, in this case, the inner tubular element is initially provided with a continuous external screw thread which is subsequently milled to produce longitudinal recesses 15 as indicated above.
The outer tubular element 12 also has a shaped cross-section with an inner profile defining second projections and second re-entrant portions, 18 and 19, respectively.
There is thus a series of recurring corrugations extending substantially continuously longitudinally and spaced apart at regular intervals around the circumference of the element with an approximately sinusoidal shape with respect to the median circle of the element and with a profile complementary with the corrugations of the inner element 11.
As can be seen in Figure 3, when the inner element 11 is fitted in the outer element 12, the first projections 16 of the inner element 11 fit in the second re-entrant portions 19 of the outer element 12 so that the support 10 has a plurality of points of contact between the two tubular elements 11 and 12 even in the presence of minimal oscillations, ensuring a considerable increase in the stability of the structure in comparison with conventional systems.
A thread sector of one first projection 16 is removed, for example, by a mechanical flattening process, so as to produce a flat and slightly recessed surface 16a.
The extension of the inner element 11 from the outer element 12 is adjusted by clamping means which can lock the relative sliding of the elements in at
Ieast one of the two directions of sliding. A ring nut 20 engaged by male/female screw coupling on the interrupted thread portions of the inner element 11, is used for this purpose and, in conditions of use, comes into stop abutment bearing on a shaped plate 21 fixed firmly to the top of the outer element 12.
The shaped plate 21 is made of tough metal to prevent problems of wear of the bearing surface between the plate 21 and the ring nut 20 owing mutual friction during extension-adjustment operations.
Upon completion of the adjustment, the assembly constituted by the inner element 11 and by the ring nut 20 is clamped in the desired position by a spring hook 22 which is articulated to the top of the element 12 and engages on a lower flange 23 of the ring nut 20.
A safety pawl 25, fixed in a corresponding threaded hole 24 in the flat surface
16a of the inner element 11, extends in the corresponding second re-entrant portion 19a of the outer element 12.
A plate 27 suitable for forming a catch for the pawl 25 is fixed in the second re-entrant portion 19a, in the vicinity of the upper end of the outer element
12, by means of screws 26.
The pawl 25 and the plate 27 ensure both that it is completely impossible for the inner element 11 to slip out of the outer element, and that a portion 28 of the inner element 11 is inserted in the outer element 12, thus ensuring the stability of the assembly in use.
Advantageously, the inner and outer elements 11 and 12 may be made of aluminium alloy or of another light alloy.
The present invention has been found in practice to have led to the achievement of the objects proposed.
Moreover, a support structure is provided which prevents problems of wear connected with the operation to adjust the relative extension of the inner and outer elements.
Furthermore, the support 10 solves the problem of slipping of the inner element 11 out of the outer element 12 as well as setting-up problems with regard to reduced stability should the support 10 be used with the element 11 extending too far from the outer element 12; the portions of the two tubular elements which interact are thus sufficient to ensure the equilibrium and stability of the assembly with respect to the vertical axis.
The structure is simple and inexpensive.

Claims

1. A telescopic support, particularly for building use, comprising at Ieast two tubular elements, that is, an outer element (12) and an inner element (11), slidable telescopically one inside the other, and clamping means for locking the relative sliding of the elements in at Ieast one of the directions of sliding, characterized in that the inner element (11) has, in cross-section, a series of recurring corrugations extending substantially continuously longitudinally and distributed at regular intervals around the circumference of the element.
2. A telescopic support according to Claim 1 in which he corrugations have an approximately sinusoidal shape with respect to a median circle of the inner element.
3. A support according to Claim 1 or Claim 2, characterized in that portions of a screw thread (17) having interrupted portions are formed on at Ieast some of the outer ridges of the corrugations, the thread extending on at Ieast part of the inner element (11) and forming part of the clamping means.
4. A telescopic support according to one or more of the preceding claims, characterized in that the outer element (12) also has, in cross-section, a series of recurring corrugations extending substantially continuously longitudinally and distributed at regular intervals around the circumference of the element, the corrugations being complementary with the corrugations of the inner element (11).
5. A telescopic support according to one or more of the preceding claims, the inner tubular element having an outer surface with a screw thread (17) with interrupted portions, an adjustment ring-nut (20) being engaged on the thread (17) by male/female screw coupling, and in which a flattened portion (16a) is provided on one of the corrugations (16) to provide a recessed flat surface on which at Ieast one safety element (25) is fixed at a predetermined distance from the lower end, the safety element (25) extending in a corresponding second re-entrant portion (19a) of the outer tubular element (12) which in turn carries, fixed in the vicinity of the upper end of the outer tubular element, a catch and stop element (27) for the safety element, for preventing slipping- out.
6. A support according to Claim 5, characterized in that the safety element comprises a safety pawl (25).
7. A support according to Claim 6, characterized in that the pawl is engaged by male/female screw coupling in a corresponding threaded hole (24) formed in the flat surface (16a).
8. A support according to one or more of the preceding claims, characterized in that the catch element comprises a keep plate (27).
9. A support according to Claim 8, characterized in that the plate (27) is fixed, by means of screws (26), in the vicinity of the upper end of the outer tubular element.
10. A support according to one or more of the preceding claims, comprising a spring hook (22) which is articulated to the upper end of the outer element (12) and which engages on a flange (23) of the ring nut.
11. A support according to one or more of the preceding claims, characterized in that it comprises a shaped plate (21) which is fixed firmly to the upper end of the outer tubular element (12) and with which the ring nut (20) comes into stop abutment, bearing thereon, in conditions of use.
12. A support according to Claim 11, characterized in that the shaped plate (21) is made of tough metal less susceptible to wear than the material of the ring nut.
PCT/IT2002/000663 2001-10-17 2002-10-16 Telescopic support, particularly for building use WO2003033839A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
HU0401848A HU224892B1 (en) 2001-10-17 2002-10-16 Telescopic support, particularly for building use
DE60202792T DE60202792T2 (en) 2001-10-17 2002-10-16 TELESCOPIC SUPPORT, ESPECIALLY FOR CONSTRUCTION
AT02788518T ATE288005T1 (en) 2001-10-17 2002-10-16 TELESCOPIC SUPPORT, ESPECIALLY FOR CONSTRUCTION
EP02788518A EP1436472B1 (en) 2001-10-17 2002-10-16 Telescopic support, particularly for building use

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD2001U000098 2001-10-17
IT2001PD000098U ITPD20010098U1 (en) 2001-10-17 2001-10-17 TELESCOPIC SHORE STRUCTURE PARTICULARLY FOR CONSTRUCTION USE

Publications (1)

Publication Number Publication Date
WO2003033839A1 true WO2003033839A1 (en) 2003-04-24

Family

ID=11452334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2002/000663 WO2003033839A1 (en) 2001-10-17 2002-10-16 Telescopic support, particularly for building use

Country Status (8)

Country Link
EP (1) EP1436472B1 (en)
AT (1) ATE288005T1 (en)
DE (1) DE60202792T2 (en)
ES (1) ES2236606T3 (en)
HU (1) HU224892B1 (en)
IT (1) ITPD20010098U1 (en)
PT (1) PT1436472E (en)
WO (1) WO2003033839A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007039422A2 (en) * 2005-09-21 2007-04-12 Pilosio Spa Support device for making formworks for floors or similar building structures
EP1849930A1 (en) * 2006-04-26 2007-10-31 Freyssinet Support arm for a modular scaffolding system as well as modular scaffolding with such an arm
FR3000122A1 (en) * 2012-12-20 2014-06-27 Merle Temporary railing for constructing building, has barrier railing part arranged on transverse plane that is formed in base, locking stem fixed at internal tube such that portion of locking stem is approximately aligned with bolt
SE2050268A1 (en) * 2020-03-11 2021-09-12 Nordiska Balco Ab Telescopic pillar system and the use of such pillar system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855157C (en) * 1950-05-08 1952-11-10 Kwikform Ltd Stamp with two parts that can be moved one inside the other
FR2225033A5 (en) * 1973-04-04 1974-10-31 Koehl Ets Building excavation shoring strut - has tube with bearing-plate screw with angle and stop-pieces and stop nut
EP0533666A1 (en) * 1988-12-13 1993-03-31 LE MAY, David S. Use of calcium soap for the treatment of inflammatory skin reactions in horses and ponies
EP0553666A1 (en) 1992-01-25 1993-08-04 Peri Gmbh Length adjustable support
US5318388A (en) * 1992-04-08 1994-06-07 Sgb Holdings Limited Improvement in or relating to a shoring leg: a shoring leg with a latch
US5388666A (en) * 1992-01-25 1995-02-14 Peri Gmbh Support scaffold
EP0921254A1 (en) * 1997-12-04 1999-06-09 SGB Services Plc. A shoring leg

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855157C (en) * 1950-05-08 1952-11-10 Kwikform Ltd Stamp with two parts that can be moved one inside the other
FR2225033A5 (en) * 1973-04-04 1974-10-31 Koehl Ets Building excavation shoring strut - has tube with bearing-plate screw with angle and stop-pieces and stop nut
EP0533666A1 (en) * 1988-12-13 1993-03-31 LE MAY, David S. Use of calcium soap for the treatment of inflammatory skin reactions in horses and ponies
EP0553666A1 (en) 1992-01-25 1993-08-04 Peri Gmbh Length adjustable support
US5388666A (en) * 1992-01-25 1995-02-14 Peri Gmbh Support scaffold
US5318388A (en) * 1992-04-08 1994-06-07 Sgb Holdings Limited Improvement in or relating to a shoring leg: a shoring leg with a latch
EP0921254A1 (en) * 1997-12-04 1999-06-09 SGB Services Plc. A shoring leg

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007039422A2 (en) * 2005-09-21 2007-04-12 Pilosio Spa Support device for making formworks for floors or similar building structures
WO2007039422A3 (en) * 2005-09-21 2007-07-05 Pilosio Spa Support device for making formworks for floors or similar building structures
EP1849930A1 (en) * 2006-04-26 2007-10-31 Freyssinet Support arm for a modular scaffolding system as well as modular scaffolding with such an arm
FR3000122A1 (en) * 2012-12-20 2014-06-27 Merle Temporary railing for constructing building, has barrier railing part arranged on transverse plane that is formed in base, locking stem fixed at internal tube such that portion of locking stem is approximately aligned with bolt
SE2050268A1 (en) * 2020-03-11 2021-09-12 Nordiska Balco Ab Telescopic pillar system and the use of such pillar system
SE545619C2 (en) * 2020-03-11 2023-11-14 Balco Group Ab Telescopic pillar system and the use of such pillar system

Also Published As

Publication number Publication date
ITPD20010098U1 (en) 2003-04-17
DE60202792T2 (en) 2006-01-12
ES2236606T3 (en) 2005-07-16
PT1436472E (en) 2005-06-30
HUP0401848A2 (en) 2004-12-28
DE60202792D1 (en) 2005-03-03
EP1436472A1 (en) 2004-07-14
EP1436472B1 (en) 2005-01-26
ATE288005T1 (en) 2005-02-15
HU224892B1 (en) 2006-04-28

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