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EP0114829A1 - Post with spring joint. - Google Patents

Post with spring joint.

Info

Publication number
EP0114829A1
EP0114829A1 EP83901109A EP83901109A EP0114829A1 EP 0114829 A1 EP0114829 A1 EP 0114829A1 EP 83901109 A EP83901109 A EP 83901109A EP 83901109 A EP83901109 A EP 83901109A EP 0114829 A1 EP0114829 A1 EP 0114829A1
Authority
EP
European Patent Office
Prior art keywords
post
sleeve
joint
tubes
tube
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
EP83901109A
Other languages
German (de)
French (fr)
Other versions
EP0114829B1 (en
Inventor
Kjell Jansson
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.)
SAMHALL FORMEL
Original Assignee
FORMEL PRODUKTER
FORMELPRODUKTER
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
Priority claimed from SE8203369A external-priority patent/SE451180B/en
Application filed by FORMEL PRODUKTER, FORMELPRODUKTER filed Critical FORMEL PRODUKTER
Priority to AT83901109T priority Critical patent/ATE33944T1/en
Publication of EP0114829A1 publication Critical patent/EP0114829A1/en
Application granted granted Critical
Publication of EP0114829B1 publication Critical patent/EP0114829B1/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C19/00—Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor
    • A63C19/06—Apparatus for setting-out or dividing courts
    • A63C19/062—Slalom gate poles, posts or marking sticks for sport fields
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
    • E01F9/627—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection self-righting after deflection or displacement

Definitions

  • the present invention relates to a post including two tubes, the respective mutually opposing end portions of which are united by a spring joint, comprising an elongate spring means extending inside the pipes and with longitudinal bias being anchored relative the tubes.
  • Such posts are used as slalom posts, traffic and lamp posts etcetera.
  • the spring means is normally a coil spring. Although such a spring means serves its purpose well for heavy posts, where the spring joint seldom needs to come into action, it results in a rather complicated structure, which is accordingly expensive, inter alia, in respect of the spring mountings in both tubes.
  • the object of the present invention is to provide a spring joint for a post of the kind defined in the introduction, the embodiment of the joint being simple and cheap, even so allowing a large number of flexings at the joint without risking collapse of the joint structure.
  • the structure shall also allow the selection of sufficiently large bias for the resilience of the joint to be very stiff as well as allowing the use of adjustment means for the bias.
  • Figure 1 is an axial section through a slalom post
  • Figure 2 illustrates a portion of a slalom post in axial section to clarify a modification
  • Figure 3 is an axial section of a further embodiment of a slalom post
  • Figure 4 illustrates to a much enlarged scale a section IV of the embodiment in Figure 3 when the post is flexed at the joint.
  • the joint includes a substantially rod-shaped core body 2 from polymeric material such as rubber, polyurethane etcetera.
  • the body 2 is enclosed biassed or pretensioned in its longitudinal direction in two sleeves 4 made from steel or the like, the end surfaces 5 of these sleeves being pressed against each other by the bias.
  • a tube 6, of hard plastics, aluminium etcetera is disposed for enclosing the sleeves 4.
  • the core body 2 is fastened by rivets 10, 12 to said sleeves. Each tube 6 engages a shoulder 11 on the respective sleeve 4.
  • the joint may be assembled with bias in the core body 2 as follows.
  • the lower sleeve 4 is brought over the core body 2 such that It assumes the position shown, and the core body is fixed in the sleeve by the lower rivet 10, or two crossing rivets.
  • the upper sleeve 4 is brought over the core body 2, and tensional stress is exercised on the core body 2 in its longitudinal direction by the lower sleeve 4 being suitably fixed and a tensional force in a direction from the sleeves 4 being applied to the projecting end of the body 2. While this tension is being applied the upper rivet 12, or two crossing rivets, are arranged through the upper end of the sleeve 4 and the core body 2. When the tensional force is removed the body is thus axially pretensioned with the aid of rivets 10 and 12.
  • FIG. 1 A modification of the embodiment in Figure 1 is illustrated in Figure 2.
  • the upper sleeve is made in two parts 14 and 16, which are in thread engagement 18 with each other.
  • the sleeve part 14 is fixed against axial upwards movement of the upper end f the core body 2 by a pin 20, which only passes through the core body 2.
  • the bias in the core body 2 may now be adjusted and even applied by screwing the sleeve 14 on sleeve 16 after the upper tube 6 has been slipped upwards. No corresponding rotation of the core body 2 will take place since the pin 20 does not pass through the sleeve 14.
  • the core body 2 is surrounded at the joint by an upper joint sleeve 22 and a reinforcing sleeve 24.
  • the tube 6 is slipped over both tubes 22 and 24.
  • a rivet 26 passes through the reinforcing sleeve 24 and the tube 6 so that the core body 2 is kept fixed with respect to the latter.
  • a lower joint sleeve is made up from two sleeve parts 28 and 30, which are threaded to each other at 32.
  • a rivet 34 is passed through sleeve part 30.
  • the lower tube 6 is then slipped over the sleeve parts 28, 30.
  • For adjusting the pretension the lower tube 6 is drawn downwardly to uncover the sleeve 30 for manipulation.
  • the upper sleeve part 22 is terminated by a shoulder 36 surrounding a radially projecting flange 38 on the lower sleeve part 28.
  • the shoulder 36 and flange 38 serve to locate sleeve parts 22 and 28 mutually.
  • Figure 4 illustrates the situation when the joint comes into operation as a result of applying a lateral force to the portion of the post above the joint.
  • the bias of the core body 2 in the sleeves results in that their opposing end faces are always kept pressed against each other with a given force caused by the bias.
  • the bias is selected such that the joint will flex when the post is subjected to forces from different directions, but will regain its straight configuration immediately afterwards.
  • the spring movement is, of course, directly dependent on the magnitude of the bias or pretension.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Materials For Medical Uses (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

Un poteau comprend deux tubes de poteau (6) dont les extrémités adjacentes sont reliées par un raccord élastique comprenant un organe élastique allongé (2) qui s'étend à l'intérieur des tubes de poteau et qui est fixé par rapport à ceux-ci et sollicité axialement. L'organe élastique est formé d'un corps allongé massif (2) en matériau polymère, qui remplit au moins sensiblement la section transversale des tubes de poteau, et dont au moins une partie de sa longueur est entourée par au moins un manchon (4), auquel ledit corps (2) est directement fixé, et sur lequel un des tubes de poteau (6) correspondants est glissé. L'extrémité du manchon adjacente au raccord est fixée de façon à empêcher son déplacement dans la direction de l'autre tube de poteau (6).A post comprises two post tubes (6), the adjacent ends of which are connected by an elastic connector comprising an elongated elastic member (2) which extends inside the post tubes and which is fixed with respect thereto and axially stressed. The elastic member is formed by a massive elongated body (2) of polymer material, which at least substantially fills the cross section of the post tubes, and at least part of its length is surrounded by at least one sleeve (4 ), to which said body (2) is directly fixed, and on which one of the corresponding post tubes (6) is slid. The end of the sleeve adjacent to the fitting is fixed so as to prevent its movement in the direction of the other post tube (6).

Description

Post with spring joint.
The present invention relates to a post including two tubes, the respective mutually opposing end portions of which are united by a spring joint, comprising an elongate spring means extending inside the pipes and with longitudinal bias being anchored relative the tubes. Such posts are used as slalom posts, traffic and lamp posts etcetera.
The spring means is normally a coil spring. Although such a spring means serves its purpose well for heavy posts, where the spring joint seldom needs to come into action, it results in a rather complicated structure, which is accordingly expensive, inter alia, in respect of the spring mountings in both tubes.
In fields of use where the spring joint must come into action often, particularly with plastic posts of slender dimensions, e.g. slalom posts, it has been found that a coil spring is quite simply too strong, resulting in that the material in the posts in which the spring is mounted becoming fatigued, and finally results in the spring wrenching itself loose. In the French patent 2 044 032 there is proposed the use of a rubber chord as spring means. At either end this chord has a head, which is inserted in a recess in an associated joint member. The joint members are kept urged towards each other by the bias of the rubber chord, each member carrying a post tube.
With this known joint, neither the restricted transverse dimension of the chord nor the implementation of the joint members allow the application of sufficient bias for the resilience of the joint to be given enough stiffness. These known slalom posts have consequently been found to yield too much. The joint structure of the French patent is furthermore such as to negate the use of any kind of regulating mechanism for the bias.
The object of the present invention is to provide a spring joint for a post of the kind defined in the introduction, the embodiment of the joint being simple and cheap, even so allowing a large number of flexings at the joint without risking collapse of the joint structure. The structure shall also allow the selection of sufficiently large bias for the resilience of the joint to be very stiff as well as allowing the use of adjustment means for the bias.
In accordance with the invention this has been achieved by the post defined in the introduction being given the distinguishing features disclosed in the following claim 1. The invention will now be described in detail hereinafter, with reference to some embodiments depicted on the accompanying drawing, wherein Figure 1 is an axial section through a slalom post, Figure 2 illustrates a portion of a slalom post in axial section to clarify a modification, of the embodiment in Figure 1, Figure 3 is an axial section of a further embodiment of a slalom post and Figure 4 illustrates to a much enlarged scale a section IV of the embodiment in Figure 3 when the post is flexed at the joint.
In the embodiment of Figure 1 the joint includes a substantially rod-shaped core body 2 from polymeric material such as rubber, polyurethane etcetera. The body 2 is enclosed biassed or pretensioned in its longitudinal direction in two sleeves 4 made from steel or the like, the end surfaces 5 of these sleeves being pressed against each other by the bias. A tube 6, of hard plastics, aluminium etcetera is disposed for enclosing the sleeves 4. The core body 2 is fastened by rivets 10, 12 to said sleeves. Each tube 6 engages a shoulder 11 on the respective sleeve 4. The joint may be assembled with bias in the core body 2 as follows. The lower sleeve 4 is brought over the core body 2 such that It assumes the position shown, and the core body is fixed in the sleeve by the lower rivet 10, or two crossing rivets. Thereupon the upper sleeve 4 is brought over the core body 2, and tensional stress is exercised on the core body 2 in its longitudinal direction by the lower sleeve 4 being suitably fixed and a tensional force in a direction from the sleeves 4 being applied to the projecting end of the body 2. While this tension is being applied the upper rivet 12, or two crossing rivets, are arranged through the upper end of the sleeve 4 and the core body 2. When the tensional force is removed the body is thus axially pretensioned with the aid of rivets 10 and 12. Finally, the tubes 6 are put in place. A modification of the embodiment in Figure 1 is illustrated in Figure 2. Here the upper sleeve is made in two parts 14 and 16, which are in thread engagement 18 with each other. The sleeve part 14 is fixed against axial upwards movement of the upper end f the core body 2 by a pin 20, which only passes through the core body 2. The bias in the core body 2 may now be adjusted and even applied by screwing the sleeve 14 on sleeve 16 after the upper tube 6 has been slipped upwards. No corresponding rotation of the core body 2 will take place since the pin 20 does not pass through the sleeve 14. In the embodiment according to Figure 3 the core body 2 is surrounded at the joint by an upper joint sleeve 22 and a reinforcing sleeve 24. The tube 6 is slipped over both tubes 22 and 24. A rivet 26 passes through the reinforcing sleeve 24 and the tube 6 so that the core body 2 is kept fixed with respect to the latter.
A lower joint sleeve is made up from two sleeve parts 28 and 30, which are threaded to each other at 32. After pretensioning the core body 2, a rivet 34 is passed through sleeve part 30. The lower tube 6 is then slipped over the sleeve parts 28, 30. For adjusting the pretension the lower tube 6 is drawn downwardly to uncover the sleeve 30 for manipulation. As more closely illustrated In Figure 4 the upper sleeve part 22 is terminated by a shoulder 36 surrounding a radially projecting flange 38 on the lower sleeve part 28. The shoulder 36 and flange 38 serve to locate sleeve parts 22 and 28 mutually. Figure 4 illustrates the situation when the joint comes into operation as a result of applying a lateral force to the portion of the post above the joint.
It will be understood that the bias of the core body 2 in the sleeves results in that their opposing end faces are always kept pressed against each other with a given force caused by the bias. The bias is selected such that the joint will flex when the post is subjected to forces from different directions, but will regain its straight configuration immediately afterwards. The spring movement is, of course, directly dependent on the magnitude of the bias or pretension.
Among the areas of use for the spring joint, in addition to slalom posts, traffic and lamp posts may be mentioned.

Claims

Claims.
1. Post including two post tubes (6), the opposing end faces of which are connected by a spring joint, which includes an elongate spring means (2) extending inside said tubes and being fastened relative these under axial pretension, c h a r a c t e r i z e d in that the spring means is formed by a massive elongate body (2) of polymeric material, at least to a substantial extent filling out the cross-section of the tubes, a portion of its length being surrounded by at least one sleeve (4;14,16;28,30), to which said body (2) is directly fastened, and on which a corresponding one of the post tube
(6) is slipped, the end of the sleeve facing towards the joint being fixed against displacement in a direction towards the other post tube (6).
2. Post as claimed In claim 1, c h a r a c t e r i z e d in that the length of the sleeve (14, 16; 28,30) is adjustable for adjusting the bias in the body.
3. Post as claimed in claim 1 or 2, c h a r a c t e r i z e d in that the second post tube (6) is slipped onto a further sleeve (4; 22) surrounding another part of the body length such that the mutually opposing end surfaces (5) of the sleeves are pressed, while forming the joint, into mutual contact under the action of the bias or pretension applied to the body.
4. Post as claimed in claim 3, c h a r a c t e r i z e d in that the body (2) is also directly fastened to the other sleeve (4).
5. Post as claimed In any of the preceding claims, ch a r a c t e r i z e d in that the body (2) is also directly fastened to one or both of the post tubes.
6. Post as claimed in any of the preceding claims, c h a r a c t e r i z e d in that fastening of the body is arranged by means of at least one rivet (12;20,26,34) passing through the body at each fastening site.
7. Post as claimed in claim 6, chara c t e r iz ed by two rivets crossing each other at least at one fastening site.
8. Post as claimed In any of the preceding claims, chara ct e r i z e d in that the joint includes an annular end face on each of the post tubes and/or the sleeve, said faces being pressed into mutual contact under the action of the pretension applied to the body, one annular end face merging into an outer collar (36), surrounding the other annular end face, which is situated on a radially projecting flange (38) having a height of the same magnitude as the height of the collar.
9. Post as claimed In any of the preceding claims, cha rac t e r i z e d in that the post tube(s) (6) is(are) slipped over the respective sleeve (4) into engagement with a shoulder (5) provided thereon.
EP83901109A 1982-03-22 1983-03-18 Post with spring joint Expired EP0114829B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901109T ATE33944T1 (en) 1982-03-22 1983-03-18 POSTS WITH SPRING CONNECTOR.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8201803 1982-03-22
SE8201803 1982-03-22
SE8203369A SE451180B (en) 1982-03-22 1982-06-01 Post including post tubes connected by spring joint
SE8203369 1982-06-01

Publications (2)

Publication Number Publication Date
EP0114829A1 true EP0114829A1 (en) 1984-08-08
EP0114829B1 EP0114829B1 (en) 1988-05-04

Family

ID=26658116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901109A Expired EP0114829B1 (en) 1982-03-22 1983-03-18 Post with spring joint

Country Status (5)

Country Link
EP (1) EP0114829B1 (en)
DE (1) DE3376469D1 (en)
FI (1) FI76407C (en)
NO (1) NO152157C (en)
WO (1) WO1983003361A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557221B3 (en) * 1983-12-27 1986-03-28 Metal Plastic MEANS OF ARTICULATION BETWEEN TWO COAXIAL TUBULAR ELEMENTS
EP0240595A1 (en) * 1986-04-03 1987-10-14 Hans Hinterholzer Slalom gate pole having a bending joint
US4862823A (en) * 1988-05-05 1989-09-05 Flexstake, Inc. Bendable marker and method of marking
IT220298Z2 (en) * 1990-11-21 1993-09-16 S P M ARTICULATED POLE FOR SKI SLOPES, WITH THE ABOVE GROUND IN SOFT MATERIAL.
FR2689777B1 (en) * 1992-04-14 1994-06-03 Dalloz Bourguignon Jean Claude RETRACTABLE POLE FOR SLALOM TRACKS.
US7794175B2 (en) 2007-07-24 2010-09-14 Mbw Technologies Delineating pole having an anchoring base and spring cartridge for snow based applications

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2044032A5 (en) * 1969-05-06 1971-02-19 See Jacques
DE2206443A1 (en) * 1972-02-11 1973-08-16 Kurt Konrad Gustav Karl Nagl BLOCKING AND LIMITING POST, SELF-ALIGNING

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8303361A1 *

Also Published As

Publication number Publication date
NO834267L (en) 1983-11-21
FI834192A0 (en) 1983-11-16
EP0114829B1 (en) 1988-05-04
DE3376469D1 (en) 1988-06-09
FI834192L (en) 1983-11-16
FI76407C (en) 1988-10-10
NO152157C (en) 1985-08-14
NO152157B (en) 1985-05-06
FI76407B (en) 1988-06-30
WO1983003361A1 (en) 1983-10-13

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