US3881572A - Tube connection, e. g. for a ladder - Google Patents

Tube connection, e. g. for a ladder Download PDF

Info

Publication number
US3881572A
US3881572A US389662A US38966273A US3881572A US 3881572 A US3881572 A US 3881572A US 389662 A US389662 A US 389662A US 38966273 A US38966273 A US 38966273A US 3881572 A US3881572 A US 3881572A
Authority
US
United States
Prior art keywords
tube
bore
plug
ladder
wall
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.)
Expired - Lifetime
Application number
US389662A
Other languages
English (en)
Inventor
Heinrich Zenhausern
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3881572A publication Critical patent/US3881572A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/086—Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B17/00—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation
    • F16B17/004—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation of rods or tubes mutually
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/4992—Overedge assembling of seated part by flaring inserted cup or tube end
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube

Definitions

  • ABSTRACT The invention concerns a process for connecting two mutually perpendicular tubes of different diameters by anchoring the end of the smaller tube in a bore in the mantle surface of the larger tube, particularly for connecting rungs and stiles, of a ladder, and a ladder so made.
  • a plug of frusto-conical shape is introduced with its narrower end into the smaller tube the end of which, together with the plug, is pressed through the bore against the inner wall of the thicker tube such that the edge of smaller tube within the bore is deformed against the bore edge by the plug.
  • the proposed process consists in that a plug which widens conically is introduced with its narrow end into the end of the thinner tube and the tube piece end together with the plug are pressed through the bore in the mantle surface of the thicker tube piece against the inner wall of the latter opposite the bore such that the edge of tube piece within the bore is spread out and compressed against the bore edge due to the penetration thereinto of the plug, whereby to form a waterproof and non-detachable connection.
  • a stop in the form of a web is arranged against which the free end of the plug is pressed.
  • the pressed-in tube end will be particularly well blocked in.
  • a ladder made by the process has conical plugs pressed into the rung ends, which plugs come to bear against a web which extends along the inner wall of the ladder stile opposite the bores in the mantle surface of the stile which serve for receiving the rungs.
  • FIG. I is a horizontal section of a tube connection
  • FIG. 2 is the same connection in vertical section along the line ll of FIG. 1,
  • FIG. 3 is a horizontal section of a variant of FIG. I.
  • FIG. 4 is a detail view.
  • FIGS. 1 and 2 show the connection of two mutually perpendicularly extending tube pieces I and 2, where one ofthe tubes l has a greater diameter than the other tube 2.
  • the tube 1 is provided with a bore 3 in its mantle surface through which the end of tube 2 is to be introduced and anchored.
  • a frusto-conical plug 4 e.g. of hard plastics material, is provided the small, possibly ribbed, end 5 of which is introduced into the end of the tube 2.
  • the tube 2 is pressed into the bore 3, whereby the projecting end 6 of the plug 4 comes to bear either directly against the inner wall of the pipe 1 or, as shown in FIG.
  • the frusto-conical plug 4 spreads the edge of the tube 2 apart and compresses it against the edge of the bore so that a waterproof and non-detachable connection is formed. Simultaneously the tube 2 is closed off inside and outside and the penetration of moisture is prevented. Expediently, the rungs made from the tubes 2 are prestressed, whereby an torsional load that may arise is compensated.
  • FIG. 3 illustrates a further developed exemplary embodiment of the tube connection.
  • the larger tube piece is designated here with 8 and has a bore 9 into which the smaller tube piece 10 is to be set. Serving to anchor the latter, a plug 11 is again used, which is shown in detail in FIG. 4.
  • This plug 11 is essentially arranged in five sections.
  • An end section 12 is cylindrical and of somewhat smaller cross-section than the internal cross-section of the tube 10 to be secured. This section 12 serves for guiding the plug I1 and holding it tightly when it is engaged into the tube 10.
  • a frusto'conical part 13 is present, the smallest cross-section of which corresponds to that of the section 12, while its greatest crosssection exceeds the internal cross-section of the tube 10. This part 13 has the task of widening the end of the tube 10 when the latter is pressed in.
  • the end part 16 lies with its end face against the inside of the web 17 arranged on the inside of the tube (see FIG. 3).
  • additional webs 18 are arranged laterally of and parallel with the web 17, which webs provide additional resistance during the introduction of the tube end 10 to the plug II and cause a still better upsetting or compression of the edge of the tube 2.
  • a ladder made of prefabricated elements may very quickly and simply be assembled together, wherein the non-detachable connections between stile and rungs are absolutely waterproof and remain very resistant to external chemical and physical influences.
  • the free ends of the tubes 1 or 8 forming the stiles are closed off with closure plates so that the interior of the tubes is protected against corrosion.
  • the webs utilised serve additionally as stabilisers, whereby the bending resistance of the ladders is increased.
  • the weakening of the tubes 1 or 8 due to the bore 3 or 9 is compensated by the webs 7 or 17 and I8 and by the prestressing of the rungs.
  • a tube connection comprising a first tube, a second tube substantially perpendicular to the first tube, the tubes having different cross-sections, a bore formed in the second tube for receiving the first tube, a connecting member a part of which is received in the open end of the first tube and the remainder of which abuts, directly or indirectly against the inner wall of the second tube, wherein the connecting member comprises a first, cylindrical portion, a second, frusto-conical portion, a third, cylindrical portion, a fourth, frustoconical portion, and a fifth, cylindrical portion, the first portion being of greater diameter than the fifih portion and the second portion, is of greater maximum diameter than the internal diameter of the first tube to assist in deforming the end of the latter against the edge of the bore in the second tube and the inner wall of the second tube.
  • a tube connection particularly suitable for connecting ladder rungs with ladder stiles, consisting essentially of:
  • a substantially frusto-conical plug having a projecting annular edge, pressed partly into the end of said first tube for each connection;
  • said first tube receiving a bore of said second tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ladders (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
US389662A 1972-08-25 1973-08-20 Tube connection, e. g. for a ladder Expired - Lifetime US3881572A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1270372A CH543011A (de) 1972-08-25 1972-08-25 Verfahren zum Verbinden zweier zumindest annähernd senkrecht zueinander stehender Rohrstücke

Publications (1)

Publication Number Publication Date
US3881572A true US3881572A (en) 1975-05-06

Family

ID=4385601

Family Applications (1)

Application Number Title Priority Date Filing Date
US389662A Expired - Lifetime US3881572A (en) 1972-08-25 1973-08-20 Tube connection, e. g. for a ladder

Country Status (14)

Country Link
US (1) US3881572A (it)
JP (1) JPS5418184B2 (it)
AU (1) AU5967473A (it)
BE (1) BE803813A (it)
BR (1) BR7306591D0 (it)
CA (1) CA1018496A (it)
CH (1) CH543011A (it)
DE (1) DE2341286C3 (it)
FR (1) FR2200914A5 (it)
GB (1) GB1436420A (it)
HU (1) HU165776B (it)
IT (1) IT998398B (it)
NL (1) NL7311423A (it)
ZA (1) ZA735835B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222135A (en) * 1979-01-19 1980-09-16 Hoover Universal, Inc. Bed frame with improved leg supports
EP0074224A1 (en) * 1981-08-28 1983-03-16 A.D. Spring Mfg. Pty. Ltd. Tube junctions, tube couplings and structures made therefrom
US4530145A (en) * 1979-11-10 1985-07-23 Vaw Leichtmetall Gmbh Method of forming a pipe connection
EP0508028A1 (de) * 1991-04-08 1992-10-14 MSU-NORMEN Henri Zenhäusern AG Verfahren zum Verbinden zweier Rohrstücke und nach dem Verfahren hergestellte Rohrverbindung

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL180451C (nl) * 1975-02-24 1987-02-16 Alcoa Nederland Bv Werkwijze voor het bevestigen van een hol profiel aan een ander hol profiel, alsmede verbindingsstuk daarvoor.
JPS5258216A (en) * 1975-11-07 1977-05-13 Matsushita Refrigeration Connection method of pipe body
JPS52147536U (it) * 1976-05-01 1977-11-09
FR2439867A1 (fr) * 1978-10-24 1980-05-23 Singer Edouard Echelle et son procede de fabrication
US4587787A (en) * 1982-10-08 1986-05-13 King Thomas G Building system
GB2139824B (en) * 1983-05-04 1986-11-12 Gte Unistrut Limited Cable ladder or the like structure
GB2176822A (en) * 1985-06-24 1987-01-07 Burbridge & Son Limited H Post mounting
DE59101875D1 (de) * 1991-04-08 1994-07-14 Jaqueline Illi Verfahren zum Verbinden zweier Rohrstücke und Rohrverbindung nach dem Verfahren.
CH707114A1 (de) 2012-10-19 2014-04-30 Msu Normen Henri Zenhäusern Ag Leiter.
JP5940036B2 (ja) * 2013-10-08 2016-06-29 テックフィールズ バイオケム カンパニー リミテッド 非常に速い皮膚透過率を有するアリール−及びヘテロアリールプロピオン酸の正荷電水溶性プロドラッグ
CH710764A1 (de) 2015-02-20 2016-08-31 Msu-Normen Henri Zenhäusern Ag Leiter.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073627A (en) * 1956-11-13 1963-01-15 Emil C Ritter Branched pipe joint having a tube connecting plug
US3327385A (en) * 1963-01-04 1967-06-27 Harsco Corp Method of making ladders

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1292812A (en) * 1918-02-08 1919-01-28 Laurence S Lachman Method of uniting metal parts.
US2065902A (en) * 1935-07-02 1936-12-29 Levin Edward Garment rack joint
DE1683559U (de) * 1953-03-03 1954-09-16 Christian Meissner Bolzen.
NL6807879A (it) * 1968-06-05 1969-12-09

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073627A (en) * 1956-11-13 1963-01-15 Emil C Ritter Branched pipe joint having a tube connecting plug
US3327385A (en) * 1963-01-04 1967-06-27 Harsco Corp Method of making ladders

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222135A (en) * 1979-01-19 1980-09-16 Hoover Universal, Inc. Bed frame with improved leg supports
US4530145A (en) * 1979-11-10 1985-07-23 Vaw Leichtmetall Gmbh Method of forming a pipe connection
EP0074224A1 (en) * 1981-08-28 1983-03-16 A.D. Spring Mfg. Pty. Ltd. Tube junctions, tube couplings and structures made therefrom
EP0508028A1 (de) * 1991-04-08 1992-10-14 MSU-NORMEN Henri Zenhäusern AG Verfahren zum Verbinden zweier Rohrstücke und nach dem Verfahren hergestellte Rohrverbindung

Also Published As

Publication number Publication date
ZA735835B (en) 1974-09-25
IT998398B (it) 1976-01-20
HU165776B (it) 1974-10-28
CH543011A (de) 1973-10-15
FR2200914A5 (it) 1974-04-19
GB1436420A (en) 1976-05-19
BE803813A (fr) 1973-12-17
BR7306591D0 (pt) 1974-06-27
DE2341286A1 (de) 1974-02-28
NL7311423A (it) 1974-02-27
DE2341286C3 (de) 1981-10-15
JPS4957965A (it) 1974-06-05
CA1018496A (en) 1977-10-04
DE2341286B2 (de) 1980-10-23
AU5967473A (en) 1975-02-27
JPS5418184B2 (it) 1979-07-05

Similar Documents

Publication Publication Date Title
US3881572A (en) Tube connection, e. g. for a ladder
EP0034332B1 (de) Bauelement zur Wärmedämmung bei Gebäuden
US5775849A (en) Coupler for ducts used in post-tension rock anchorage systems
US6234709B1 (en) Wedge-receiving cavity with radiused edge for an anchor body of a post-tension anchor system
CA1042638A (en) Swaging dies
CA2090952C (en) Mine roof expansion anchor and bail element
US1899799A (en) Welded bracket connection
CN110396916A (zh) U形薄壁钢-预应力混凝土组合盖梁与薄壁钢管混凝土墩柱节点构造及施工工艺
DE3717816A1 (de) Halte- und traganker
DE102018003160A1 (de) Ankerschiene
DE3509890C2 (de) Bauelement zur Körperschalldämmung
CN108914781A (zh) 一种带装配式焊钉连接件组合梁的连接施工工艺
KR102199131B1 (ko) 영구형 앵커
DE1759561B2 (de) Verfahren zum herstellen von verpressankern und vorrichtung zum durchfuehren des verfahrens
US1634674A (en) Method of connecting metallic elements
EP0578713B1 (de) Gliederanker
AU770287B2 (en) Tube-formed rock bolt
US3340664A (en) Concrete structure with butt spliced compression and tension reinforcement
EP0156115B1 (de) Spreizdübel
CN209799078U (zh) 一种剪刀梯楼梯间全预制防火隔墙连接结构
EP1584763B1 (de) Luftschichtanker mit Sicken
DE7129341U (de) Dübelanker
SU1539276A1 (ru) Узел соединени ригел с колонной железобетонного каркаса здани
CH674752A5 (it)
DE2201950A1 (de) Zuganker zum verankern von bauteilen in erdigem oder felsigem baugrund