EP0260671B1 - Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage - Google Patents

Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage Download PDF

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Publication number
EP0260671B1
EP0260671B1 EP87113530A EP87113530A EP0260671B1 EP 0260671 B1 EP0260671 B1 EP 0260671B1 EP 87113530 A EP87113530 A EP 87113530A EP 87113530 A EP87113530 A EP 87113530A EP 0260671 B1 EP0260671 B1 EP 0260671B1
Authority
EP
European Patent Office
Prior art keywords
rivet
racket
string
sleeve
strings
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
EP87113530A
Other languages
German (de)
English (en)
Other versions
EP0260671A3 (en
EP0260671A2 (fr
Inventor
Hans-Werner Korte-Jungermann
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
Priority to AT87113530T priority Critical patent/ATE66626T1/de
Publication of EP0260671A2 publication Critical patent/EP0260671A2/fr
Publication of EP0260671A3 publication Critical patent/EP0260671A3/de
Application granted granted Critical
Publication of EP0260671B1 publication Critical patent/EP0260671B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/025—Means on frames for clamping string ends
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/14—Arrangements for stringing, e.g. for controlling the tension of the strings during stringing
    • A63B51/143—Hand-held string-tensioning devices

Definitions

  • the invention relates to a racket for ball games, in particular tennis games, with a covering of the racket surface, the covering being led through holes in the frame and the covering between opposite holes each having individual strings, and the individual strings in the racket frame being attached to the strings by squeezing pressure a pair of pliers or the like.
  • Locked sleeves are held which rest with a part projecting over their outer circumference against hole edges and whose locking areas lie within the racket frame, together with individual strings and stringing processes therefor.
  • the covering of rackets for ball games, in particular tennis rackets is carried out in such a way that a string is guided through holes in the edge of the racket, for example from the inside to the outside, deflected and then guided in the subsequent hole from the outside in again, so that there is an overall meandering string arrangement results. If a string breaks, this of course also affects the neighboring strings, so that in this case the entire string must be replaced.
  • Another disadvantage of rackets with this known type of stringing is that due to the deflection of the strings, each of the areas of adjacent holes facing one another are loaded with large forces (so-called hole reveal forces), which can sometimes lead to breakage, particularly after prolonged use of the racket.
  • Another disadvantage is that the covering of rackets by means of quite complex, usually only stringing devices to be used by specialists.
  • a racket for ball games, in particular tennis games is known, in which the covering between opposite holes each has individual strings, and the individual strings in the racket frame by means of sleeves attached to the strings and locked by pinching pressure of a pair of pliers or the like are held, which rest with a part projecting over their outer circumference against hole edges.
  • the sleeves are of such a length that, when they are inserted into the holes in the frame, they have inwardly projecting areas in the covering surface of the frame.
  • the sleeve has an external thread on its outside and a cylindrical region without an external thread.
  • the external thread extends to almost half the total length of the sleeve.
  • the part intended to be placed against the edge of the hole is designed as a nut with an internal thread, which can be screwed onto the external thread.
  • the area without external thread is designed to absorb the pinching pressure of a pair of pliers or the like for the purpose of locking a string inserted into the sleeve.
  • the squeezing pressure is applied in the area of the stringing surface of the racket frame.
  • the sleeve is then inserted into the respective hole from the inside of the holes in the racket frame so that the external thread is directed forward.
  • a nut is then screwed onto the external thread from the outside of the hole and the desired tension is thereby applied. If the end piece of the sleeve protrudes beyond the nut and the outer edge of the racket after the required tension has been applied, this is cut off separately.
  • the invention has for its object to improve a racket of the type mentioned in such a way that the disadvantages of the rackets described do not occur, so that a racket which is useful in practice for ball games with single strings is of extremely simple construction and has a high utility value, which has the advantages of a racket with single strings.
  • These consist, inter alia, that if a string breaks, there is no effect on the adjacent strings, so that only the broken string has to be replaced and that the replacement is as simple as possible Way can be done without expensive stringing device.
  • the sleeves are designed as rivet sleeves and the part projecting over the outer circumference is designed as a rivet head which is fixedly connected to the respective rivet sleeve, and that the entire outer side of the rivet sleeve is cylindrical and thus the entire outer side is designed as a region for receiving the squeezing pressure .
  • the entire shaft of the rivet sleeve is available for absorbing the squeezing pressure and thus the rivet sleeve can be made shorter in comparison with the sleeve in the known racket.
  • This then has the further advantage that it is not necessary to cut off a protruding sleeve end after the attachment.
  • the tension on the string of the racket is not applied by screwing relative to the sleeve.
  • the rivet head which is firmly connected to the rivet sleeve, rather leans against the hole edge as a result of a pretension applied from the outside to the projecting end of the string.
  • a base made of elastic material, preferably plastic, is arranged between the rivet heads and the outer hole edges.
  • the rivet sleeves are surrounded by a protective tube.
  • the protective tube can advantageously serve to facilitate the sliding of the rivet sleeve into the hole.
  • the individual strings that can be used for the first stringing or also for the replacement stringing are characterized in that a rivet sleeve is firmly attached to one end of the respective single string, and that one for sliding on and connecting after certain loose rivet sleeve is provided the insertion of the string into opposite holes.
  • the method for stringing rackets for ball games, in particular tennis games, with individual strings is carried out according to DE-OS 29 28 748 so that first the sleeve is inserted into the respective hole, then the string is seen through the sleeve from the stringing side of the racket frame , then - if a locking has already taken place on the opposite side - a pretension is applied to the projecting end of the string and then pinching pressure is applied to the part of the respective sleeve projecting inward in the stringing area by means of pliers or the like. Then the free end of the string protruding outwards is cut off.
  • FR-A-855 446 From FR-A-855 446 it is also known to apply the pinch pressure to the sleeve in the stringing area of the racket. While in the subject of DE-OS 29 28 748 the squeezed locking area of the sleeve remains within the stringing area, in the item of FR-A-855 446 the squeezed locking area of the sleeve is subsequently turned by turning the nut screwed on from the outside into one within the racket frame area.
  • an advantage of the method according to the invention is that the application of the squeezing pressure to the rivet sleeve from the outside of the racket frame by means of a suitable device String done.
  • the rivet sleeve slips into the hole of the racket frame when the clamping device is relieved after the sleeve has been locked in such a way that the rivet head comes to rest against the hole edge provided for this purpose. Since the pretension initially applied to the string decreases as the rivet sleeve slides into the hole, it goes without saying that this fact must be taken into account when dimensioning the pretension to be applied.
  • a racket head, generally designated 1, of a racket for ball games, in particular tennis games, has a covering, generally designated 2.
  • the covering 2 is individual strings 3 arranged in the transverse direction and individual strings 4 arranged in the longitudinal direction.
  • the frame of the racket head 1, designated 5, has holes 6 for receiving the cross strings 3 in a known manner and holes (not shown) in a corresponding manner Recording the main strings 4.
  • the ends of the individual strings 3 and 4 are each firmly enclosed by rivet sleeves 7.
  • the outer diameter of the rivet sleeves 7 is smaller than the inner diameter of the holes 6.
  • the rivet sleeves 7 each have a rivet head 8, the outer diameter of which is larger than the inner diameter of the holes 6.
  • the outer hole edges 9 of the holes 6 are recessed, and in such a way that the rivet heads 8 do not protrude beyond the outer surface of the edge of the frame 5 when the racket is in use.
  • the strings 3 and 4 are held under tension in the frame 5 in that the rivet heads 8 rest against the outer edges 9 of the holes 6.
  • a base 10 made of elastic material, for example plastic is arranged between the hole edges 9 and the rivet heads 8.
  • the rivet sleeves 7 are surrounded by a protective tube 11.
  • FIG. 2 one of the individual strings 3, 4 is shown before clamping.
  • the length of these individual strings suitably corresponds to at least the maximum length of the longest string of the racket.
  • a rivet sleeve 7 with the rivet head 8 is firmly attached to the left end of the single string as shown in the drawing.
  • the firm connection can preferably be achieved in that the rivet sleeve 7 pushed onto the string has been compressed by means of a suitable device such that the rivet sleeve 7 tightly encloses the string.
  • a loose rivet sleeve is provided, which is denoted by 7 ⁇ in FIG. 2 and which can be pushed onto the free (right according to the drawing) end of the string.
  • each of the individual strings 3, 4 with the "free" end which therefore does not have a fixed rivet sleeve, is passed through one of the bores 6 from the outside, so that - if already present - transverse strings are crossed, and that the free end is then guided from the inside through the hole 6 opposite the first hole 6. Since the fixed rivet sleeve 7 is located at the rear end, this rivet sleeve 7 is pulled into the hole 6, and the rivet head 8 rests against the hole edge 9. The free end of the single string then protrudes from the opposite hole 6. One of the rivet sleeves 7 'is then pushed onto the free end from the outside. Then a pretension in the direction of arrow A (FIG.
  • a device for covering the racket has a tensioning device, generally designated 13, and an upsetting device, generally designated 14.
  • the tensioning device 13 operates in the manner of a torque wrench and has a contact part 15 which can be placed on the racket edge 5 and a holding part 16 which is provided for contact with the racket inner edge and is movable and thus adjustable to different frame thicknesses.
  • the holding part 16 is plate-shaped and is adjustably attached to the contact part 15 via a wing screw 17.
  • the system part 15 has a plurality of holes 18, 19 and 20.
  • a contact pin 21 is provided on the contact part.
  • a lever 22 is pivotally mounted at 23 in the clamping device 13. If the lever 22 is pivoted in the contact position shown in FIG.
  • the lever part 24 lying opposite to the pivot axis 23 is pivoted in the direction of arrow C.
  • a clamping device 25 for clamping the end region 12 of a string 3 is provided on the lever part 24.
  • the tensioning device 13 has a measuring device designed as a scale 26 for indicating the preload reached and a ratchet 26 with a spring-loaded, detachable pawl 27 which engages in notches 28 in the system part 15.
  • the clamping device 25 has a clamping surface 29 fixedly attached to the contact part 15 and an eccentrically mounted clamping disc 31 which is biased by a spring 32 against the tension direction A (or C) of the string 3.
  • the operation of the tensioning device 13 is as follows: 3 is placed on the racket frame 5, and the free end 12 is inserted into the clamping device 25 after the rivet sleeve 7 'has been pushed on. The lever 22 is then actuated in the direction of arrow B.
  • the eccentrically designed clamping disk 31 and the tension spring 32 the free end 12 of the string 3 is held in place in the event of a pivoting movement in the direction of the arrows B or C.
  • the ratchet 26 Through the action of the ratchet 26, the prestress applied in each case is retained, the size of which can be read off the scale 26.
  • the upsetting device 14 shown schematically in FIGS. 5 and 6 is designed as a pliers-like structure 32 and has semicircular regions 33 on the pliers head, the length of which corresponds approximately to the length of the rivet sleeves 7, so that the rivet sleeves 7 are each enclosed by the regions 33 and then can be compressed by operating the pliers levers 35, 36.
  • the upsetting device 14 can furthermore have a cutting device for cutting off the projecting end 12. Such a cutting device is shown schematically and designated 37.
  • the pretensioning device can, for example, also be designed to be adjustable via thread, so that the pretensioning force is adjusted by a rotary movement.
  • the prestressing force can be measured via a pressure load cell, and the achievement of the desired prestressing force can be indicated by a signal, for example a light signal.
  • the desired preload can be set on the pressure cell.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Wire Processing (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Golf Clubs (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Clamps And Clips (AREA)
  • Pinball Game Machines (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Ropes Or Cables (AREA)
  • Basic Packing Technique (AREA)
  • Adornments (AREA)

Claims (6)

  1. Raquette pour jeux de balle, en particulier pour le tennis, avec un cordage de la surface de la raquette, dans laquelle le cordage est guidé à travers des trous dans le cadre et le cordage entre des trous opposés présente chaque fois des cordes individuelles, et où les cordes individuelles sont tenues dans le cadre de la raquette au moyen de douilles enfilées sur les cordes et bloquées par la pression d'écrasement d'une pince ou autre, ces douilles prenant appui contre les bords des trous par une partie saillante sur leur pourtour, leurs zones de blocage étant situées à l'intérieur du cadre de la raquette,
    caractérisée en ce que les douilles sont sous la forme de rivets tubulaires (7) et que la partie saillante sur leur pourtour est sous la forme d'une tête de rivet (8) jointe de manière fixe au rivet tubulaire (7) correspondant, et en ce que tout le côté extérieur du rivet tubulaire (7) est cylindrique et qu'ainsi tout le côté extérieur constitue la zone d'application de la pression d'écrasement.
  2. Raquette selon la revendication 1, caractérisée en ce qu'une pièce d'appui (10) en matériau élastique est disposée chaque fois entre la tête du rivet (8) et les bords extérieurs (9) des trous.
  3. Raquette selon la revendication 1 ou 2, caractérisée en ce que les rivets tubulaires (7) sont entourés par un tube souple (11) de protection.
  4. Corde individuelle pour une raquette pour jeux de balle, en particulier selon une des revendications 1 à 3, dans laquelle les cordes individuelles sont tenues dans le cadre de raquette au moyen de douilles enfilées sur les cordes et bloquées par la pression d'écrasement d'une pince ou autre, ces douilles prenant appui contre les bords des trous par une tête de rivet saillante sur leur pourtour, et où tout le côté extérieur du rivet tubulaire est cylindrique, de telle sorte que tout le côté extérieur constitue la zone d'application de la pression d'écrasement, caractérisée en ce qu'un rivet tubulaire (7) est fixé sur une extrémité de la corde individuelle (3, 4), et en ce qu'il est prévu un rivet tubulaire (7') libre, destiné à être enfilé sur la corde et fixé à celle-ci après introduction de la corde dans des trous opposés l'un à l'autre.
  5. Corde individuelle selon la revendication 4, caractérisée en ce que les rivets tubulaires (7, 7') présentent une cannelure interne.
  6. Procédé de cordage de raquettes pour jeux de balle, en particulier pour le tennis, avec des cordes individuelles, caractérisé en ce qu'une corde individuelle (3) présentant sur une extrémité un rivet tubulaire posé de manière fixe est introduite chaque fois par son extrémité libre par un des trous (6) dans le cadre de la raquette, en ce qu'ensuite elle croise des cordes s'étendant transversalement - au cas où celles-ci sont déjà présentes, et en ce qu'ensuite l'extrémité libre est passée par l'intérieur dans le trou opposé au premier trou (6) et qu'ainsi le rivet tubulaire (7) est engagé par traction dans le trou (6) et que la tête (8) du rivet prend appui contre le bord du trou (9), et en ce qu'un rivet tubulaire (7') est enfilé par l'extérieur sur l'extrémité libre, et une tension de précontrainte est appliquée sur l'extrémité dépassante (12) de la corde (3), cette tension dépassant la valeur de la tension souhaitée pour la corde, ensuite, le rivet tubulaire (7') est fermement joint à la corde individuelle (3) par écrasement, et ensuite la tension de précontrainte est relâchée, ce qui fait que le rivet tubulaire (7') se rétracte dans le trou correspondant et que la tête (8) du rivet tubulaire (7) vient s'appuyer sur le bord (9) du trou (6) correspondant, et en ce que l'extrémité libre dépassant au delà de la tête (8) du rivet tubulaire (7') est coupée.
EP87113530A 1986-09-18 1987-09-16 Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage Expired - Lifetime EP0260671B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87113530T ATE66626T1 (de) 1986-09-18 1987-09-16 Schlaeger fuer ballspiele, insbesondere tennisspiele, sowie bespannvorrichtung hierzu.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8624960U DE8624960U1 (fr) 1986-09-18 1986-09-18
DE8624960U 1986-09-18

Publications (3)

Publication Number Publication Date
EP0260671A2 EP0260671A2 (fr) 1988-03-23
EP0260671A3 EP0260671A3 (en) 1988-08-03
EP0260671B1 true EP0260671B1 (fr) 1991-08-28

Family

ID=6798406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113530A Expired - Lifetime EP0260671B1 (fr) 1986-09-18 1987-09-16 Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage

Country Status (9)

Country Link
US (1) US4949968A (fr)
EP (1) EP0260671B1 (fr)
JP (1) JPH01500800A (fr)
AT (1) ATE66626T1 (fr)
AU (1) AU592468B2 (fr)
DE (2) DE8624960U1 (fr)
ES (1) ES2025606T3 (fr)
GR (1) GR3003085T3 (fr)
WO (1) WO1988001889A2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3835192A1 (de) * 1988-10-15 1990-04-19 Korte Jungermann Hans Werner Verfahren zur bespannung von schlaegern fuer ballspiele sowie vorrichtung zur durchfuehrung des verfahrens
DE8813761U1 (fr) * 1988-11-03 1989-02-02 Korte-Jungermann, Hans-Werner, 4156 Willich, De
ATE132381T1 (de) * 1992-01-29 1996-01-15 Voelkl Franz Ski Ballspielschläger, insbesondere tennisschläger
US5338028A (en) * 1993-12-28 1994-08-16 Right Way Co. Racket stringing apparatus
JPH10503666A (ja) * 1994-05-25 1998-04-07 コギト・ホールディングズ・リミテッド ラケットにおける改良
DE19505480A1 (de) * 1995-02-17 1996-08-22 Eberhard Von Der Mark Ballspielschläger mit Saiten-Spannvorrichtung
DE19602587A1 (de) * 1996-01-25 1997-07-31 Egram S A R L Schläger für Ballspiele, insbesondere Tennis- oder Squashschläger
US5667216A (en) * 1996-07-29 1997-09-16 Gunn; Robert H. String assembly for a racket
US5944624A (en) * 1996-12-23 1999-08-31 Prince Sports Group, Inc. Notched, slotted grommet for sports racquet
US6179735B1 (en) 1997-02-24 2001-01-30 Mcmahon Marshal Apparatus and method for maintaining differential tensions in the strings of a sporting racket
US5762570A (en) * 1997-05-07 1998-06-09 Shaw; Ching-Song Game racket having a head frame capable of absorbing shock
US6506134B2 (en) 1997-06-25 2003-01-14 Fabio Paolo Bertolotti Interlocking string network for sports rackets
US6132325A (en) * 1997-06-25 2000-10-17 Bertolotti; Fabio P Interlocking string network for sport rackets
FR2806638B1 (fr) * 2000-03-21 2002-09-20 C D M Ind Tendeur de cordes, notamment de cordes de raquettes, et machine a corder les raquettes
US6280354B1 (en) 2000-03-27 2001-08-28 Fabio P Bertolotti Monolithic string network for sport rackets
AU2000253310A1 (en) 2000-06-09 2001-12-24 Bb Group Interlocking string network for sport rackets
US6625100B2 (en) * 2001-03-20 2003-09-23 Imation Corp. Tracking techniques for holographic data storage media
US6796916B1 (en) * 2002-05-23 2004-09-28 Ef Composite Technologies, L.P. Sports racquet with deflection enhancing string bed
US7371197B1 (en) * 2007-05-25 2008-05-13 Yuan Min An Enterprise Co., Ltd. Safety racket

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032217A (en) * 1932-07-30 1936-02-25 Diehl Tensioning device
US2040194A (en) * 1934-06-28 1936-05-12 Frederick W Whiteside Device for applying and tightening the strings of tennis rackets
US2091654A (en) * 1935-01-21 1937-08-31 Thompson Mfg Company Apparatus for stringing rackets
GB471851A (en) * 1936-04-21 1937-09-13 Charles Paul Wilson Improvements in or relating to racket stringers
FR855446A (fr) * 1939-05-30 1940-05-10 Raquette
FR1188942A (fr) * 1957-12-23 1959-09-28 Perfectionnement aux raquettes de tennis
US3664668A (en) * 1970-04-03 1972-05-23 Franklin W Held Racketball or tennis racket having a tubular metal frame
AT336456B (de) * 1973-09-07 1977-05-10 Bradley Daniel C Saitenspannvorrichtung fur tennisschlager
US3994495A (en) * 1975-09-22 1976-11-30 Stoffel Robert W Tennis racket
US4140316A (en) * 1977-08-26 1979-02-20 Coupar Robert B Tennis racquet
DE2928748A1 (de) * 1979-07-17 1981-01-29 Edgar Strelow Verfahren zum befestigen einer saite an dem rahmen eines tennisschlaegers und tennisschlaeger mit mindestens einer nach diesem verfahren befestigten saite
US4309033A (en) * 1979-09-19 1982-01-05 Amf Incorporated Clamping apparatus
US4484742A (en) * 1982-11-22 1984-11-27 Mccrone James G Stringing tool for tennis rackets and the like
DE3481976D1 (de) * 1983-07-26 1990-05-23 Ivan Szedressy Tennisschlaeger mit einer vorrichtung zur saitenbefestigung.
DE3506025A1 (de) * 1985-02-21 1986-08-21 Peter 6109 Mühltal Buschbeck Tennisschlaeger
FR2587902A1 (en) * 1985-10-02 1987-04-03 Contour Bernard Racket

Also Published As

Publication number Publication date
ATE66626T1 (de) 1991-09-15
GR3003085T3 (en) 1993-02-17
EP0260671A3 (en) 1988-08-03
WO1988001889A3 (fr) 1988-04-07
AU592468B2 (en) 1990-01-11
DE3772496D1 (de) 1991-10-02
JPH01500800A (ja) 1989-03-23
WO1988001889A2 (fr) 1988-03-24
US4949968A (en) 1990-08-21
AU7917587A (en) 1988-04-07
EP0260671A2 (fr) 1988-03-23
ES2025606T3 (es) 1992-04-01
DE8624960U1 (fr) 1987-08-20

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