WO1991003284A1 - Articles de sport et materiau amortissant les chocs applique sur les articles de sport - Google Patents
Articles de sport et materiau amortissant les chocs applique sur les articles de sport Download PDFInfo
- Publication number
- WO1991003284A1 WO1991003284A1 PCT/JP1990/001084 JP9001084W WO9103284A1 WO 1991003284 A1 WO1991003284 A1 WO 1991003284A1 JP 9001084 W JP9001084 W JP 9001084W WO 9103284 A1 WO9103284 A1 WO 9103284A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vibration
- sports equipment
- absorbing member
- attached
- shock absorbing
- Prior art date
Links
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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
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K87/00—Fishing rods
-
- 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
- A63B49/08—Frames with special construction of the handle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/02—Tennis
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/32—Golf
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2244/00—Sports without balls
- A63B2244/19—Skiing
Definitions
- the present invention has an effect that when performing sports using a tool on a body such as an arm or a foot, it is possible to significantly reduce shocks and vibrations transmitted to the body such as a user's arm during use. spot can be realized that you use the sports equipment frequently paid sports equipment, and the same effect - detail c of al relates shock absorbing member used by being attached to Tsu devices, and more specifically, the use Various racquets for tennis, racquet poles, squash, etc., golf clubs, fishing poles, bicycles, skis, or baseball bags that can reduce the impact transmitted to the user at the time It is related to new sports equipment such as sports equipment, or even if it is attached to the conventional equipment in these sports equipment as described above. Can with Turkey that Sosu the effect of reducing the impact that will transmitted to use for users, it relates to a novel impact-absorbing member used by being appropriately mounted on the sports equipment.
- a tennis racket according to the present invention that can significantly reduce the impact and vibration at the time of hitting a ball is used, or the shock absorbing member according to the present invention is used as a conventional tennis racket.
- the user By attaching the racket to the rack and using the racket, the user (tennis) Players) can play tennis by preventing the occurrence of obstacles such as the elbow, commonly known as “tennis and elbows".
- the so-called "racquet” Even when you are out of the "Sweet Spot", you will feel less impact from the hand or arm as if it were resounding. Can be given to the user, so that the player can enjoy a comfortable feeling of hitting the ball and a crisp pre-sensation.
- the present invention relates to a sports equipment represented by such a tennis racket, which has an effect of significantly reducing the impact and vibration transmitted to the user's body through the sports equipment during use.
- the present invention relates to a shock-absorbing member which can be used by being appropriately attached to a sporting tool and exerting a similar effect.
- FRP fiber reinforced plastic
- the cause of this failure is that the impact or vibration that occurs when the ball hits the gut surface of the racket causes the player's elbow through the racket frame from the gut surface. Is transmitted to the It is believed to be.
- the sweet spot refers to the area around the center of the gut surface.
- beginner and intermediate level players who cannot hit the ball well at the player's elbow will be forced to swing a large frame racket made of light material. If you keep playing, you'll often fall for tennis 'elbows'.
- stabilizer is a rubber or soft synthetic resin molded product that is used by fitting it between a gut on a racquet surface and an adjacent gut, or by crimping on a gut surface. It is. Although this "stabilizer” can be said to be effective in suppressing the vibration of the gut itself, it effectively attenuates the vibration that propagates from the gut surface through the frame to the player's body. Did not have this function.
- the weight distribution of the head portion of the golf club is adjusted to adjust the position of the center of gravity of the head and to increase the moment of inertia (Japanese Utility Model Publication No. 53 — 2888), or change the horizontal and vertical lengths of the ball striking surface of the head (Japanese Utility Model Application Publication No. 61-1-657 62, Japanese Utility Model Publication No.
- Japanese Utility Model Publication No. 53 — 2888 Japanese Utility Model Application Publication No. 61-1-657 62
- Japanese Utility Model Publication No. Japanese Utility Model Publication No.
- these proposals do not solve the above-mentioned problem of alleviating the impact, and the impact and the impact at the time of hitting the ball. This does not solve the problem of discomfort with stiffness remaining on the wrist, arm and elbow, etc., resulting from the transmission of vibrations to the player, and accumulation of fatigue.
- the object of the present invention is to transmit to a user's body such as an arm or a foot at the time of performing any kind of sports using a tool with the body such as an arm or a foot.
- a user's body such as an arm or a foot
- the purpose of the present invention is to provide a shock absorbing member to be used.
- the impact and vibration that are inevitably applied from the outside when using sports equipment are reduced. It is possible to provide a sporting equipment that can be attenuated well as a function provided in the sporting equipment itself, and to have an adverse effect on the player's body such as tennis and elbow as described above. There are no sports tools that can enjoy each sport comfortably and spectacularly while enjoying the real thrill of the sport.
- the present invention provides a sports equipment that can achieve the above-mentioned effects by using a unique material for a part of the constituent material of the existing sports equipment without changing its external form.
- the above-described effects can be obtained even with a conventional sporting device by appropriately attaching the same to a conventional sports device as required, such as an attachment. It is intended to provide a shock-absorbing member to be attached to sports equipment that can be used after reaching the target.
- the sports equipment in the present invention is not particularly limited as long as it can exert the effects of the present invention.
- the sports equipment include, for example, rackets for tennis, a rack pole, a scarlet, and the like. Or so-called sticks such as fishing poles, bicycles (bicycle frames), skis, ski stocks, baseball pads, hockey and ice hockey, and gate balls. Hitting ball, more Bows and arrows, such as arc trees and Japanese bows, are preferred sports equipment according to the present invention.
- the vibration-damping material having a vibration loss coefficient of 0.01 or more at room temperature includes at least a part of the constituent materials of the sports equipment. It is a sporting device characterized by being used and configured.
- the shock absorbing member used by being attached to the sports equipment is a shock absorbing member used by being attached to the sports equipment, and has a vibration loss coefficient of 0.01 or more. At least 3 g and a height of 3 mm or more, and follow vibrations and shocks that propagate from outside of the shock absorbing member.
- the shock absorbing member is characterized in that at least one end of the shock absorbing member is attached to a sporting equipment with at least one free standing state so as to excite micro vibration or micro oscillation.
- the shock absorbing member used by being attached to a sporting device is a shock absorbing member used by being attached to a sporting device, and having a weight
- a microvibration excitation member having a height of 3 mm or more and a height of 3 mm or more and capable of exciting microvibrations or microvibrations following externally transmitted vibrations and shocks, and microvibration excitation
- a shock-absorbing member characterized by a combination of a load material with a specific gravity of 1.1 or more bonded to the member
- FIG. 1, FIG. 2, and FIG. 3 are schematic model vertical cross-sectional views showing a case of a tennis racket as one embodiment of the sports equipment according to the present invention.
- a schematic model longitudinal cross-sectional view of a tennis racket according to the present invention which is configured by using a vibration damping material as a constituent material while keeping the external shape of a conventionally existing rack o
- FIG. 4 is a schematic model cross-sectional view schematically showing various examples of how to use the vibration damping material in the sports equipment according to the present invention constituted by using a vibration material.
- FIG. 8 is a schematic diagram showing a tennis luggage according to the second embodiment of the present invention described above, in which the shock absorbing member according to the present invention is attached to a conventional tenis racket as an attachment. It is a model figure.
- FIGS. 9 to 12 show various examples of shapes and structures of the first embodiment among the shock absorbing members as the second embodiment according to the present invention.
- FIGS. 1.3 to 14 show various examples of shapes and structures of the second embodiment in which a load material is used in combination with the shock absorbing member according to the second embodiment of the present invention. Things.
- FIG. 15 shows a state in which the shock absorbing member according to the present invention is attached to a conventional golf club like an attachment.
- FIG. 4 is a schematic model diagram showing the golf club according to the second embodiment of the present invention described above.
- FIG. 16 shows the ski according to the second aspect of the present invention, in which the shock absorbing member according to the present invention is attached to a conventional ski as an attachment.
- FIG. 4 is a schematic model diagram showing a method for measuring a vibration loss coefficient of the ski employed in an example described later.
- FIG. 17 shows a baseball bat according to the above-described second aspect of the present invention in which the shock absorbing member according to the present invention is attached to a conventional baseball bat as an attachment.
- FIG. 4 is a schematic model diagram showing a method for measuring a vibration loss coefficient of the baseball bat adopted in an example described later.
- FIG. 18 shows the above-described suspension according to the second embodiment of the present invention in which the shock absorbing member according to the present invention is attached to a conventional suspension as an attachment, and will be described later.
- FIG. 5 is a schematic model diagram showing a method of measuring a vibration loss coefficient of the suspension used in the embodiment.
- FIG. 19 is related to Figs. 15 to 18 and was tested by attaching it to golf clubs, skis, baseball bats, and fishing rods in the examples described later.
- FIG. 19 is a schematic model diagram showing a shock absorbing member, showing one preferred specific form of the shock absorbing member of the present invention.
- FIG. 19 (a) is a front view
- FIG. ) Is a top view
- (c) is a cross-sectional view taken along line X-X 'of (a).
- FIG. 20 shows a tennis racket in an embodiment described later.
- FIG. 2 is a schematic model diagram showing a shock absorbing member that has been mounted and tested, and shows one of preferred specific forms of the shock absorbing member of the present invention.
- the sports equipment according to the first aspect of the present invention is obtained by using a vibration damping material having a specific vibration loss coefficient for at least a part of the constituent materials of the sports equipment, for example, as shown in FIG.
- the vibration loss coefficient of some of the constituent materials of the throat portion 3 and the grip portion 4 of the tennis racket 1 including the frame portion 2, the throat portion 3, and the grip portion 4 is 0. 0
- the vibration damping material 5 which is 1 or more is used (Fig. 2 shows an example in which the same vibration damping material 5 is used only in the grip portion 4, and Fig. 3 shows a damping material 5 having a vibration loss coefficient of 0.01 or more over almost the entire tennis racket 1 of the frame part 2, the grip part 4, and the throat part 3, so to speak.
- An example is shown in which it is used as a part of the constituent material.
- the vibration damping material 5 can be used in various ways, for example, by using a resin as a main component to constitute a sporting tool, and forming a sheet-like material inside the resin.
- a method in which a damping material 5 having a plate-like, linear, lump, net-like, or ribbon-like structure is present, and the resin is used as a composite with the resin can be used.
- the tree As the fat, it is preferable to use a fiber reinforced resin reinforced with carbon fiber or Z and glass fiber, and in particular, a resin reinforced resin in a form in which the fiber reinforced resin is present in a layered form in a sports equipment is preferable.
- a fiber-reinforced resin layer is used in combination with or adjacent to the vibration-damping material.
- a prepreg in which carbon fibers are partially used and to use it adjacent to or close to the layer of the vibration damping material.
- FIG. 4 is a schematic model cross-sectional view schematically showing various examples of how to use the vibration-damping material in the sports equipment according to the present invention constituted by using a vibration-resistant material.
- FIG. 2 is a schematic cross-sectional view of a model that is a girder part or a grip part.
- FIG. 4 shows an example in which the vibration damping material 5 having a vibration loss coefficient of 0.01 or more sandwiched between the fiber reinforced resin layers 6 is present as a single layer. It is.
- Numeral 7 is a space at the center, and the center is appropriately hollow or filled with a foamed resin according to the desired weight and strength of the sports equipment. Is filled with normal resin or high-density resin That
- a substantially hollow structure that is, a foamed resin even if it has a space where nothing exists in the hollow part or does exist It should be constructed as a structure in which very light substances are present.
- FIG. 5 shows an example in which an L-shaped layer of the vibration damping material 5 exists only on two adjacent sides.
- FIG. 6 shows an example in which a layer of the vibration damping material 5 exists only on two opposing sides.
- FIG. 7 shows an example in which the vibration damping material 5 having a vibration loss coefficient of 0.01 or more sandwiched between the fiber reinforced resin layers 6 is present in two layers. It is.
- one sports equipment may have a mixture of the parts having different structures as shown in FIG. 4 to FIG.
- Such a structure as shown in FIGS. 4 to 7 can be formed, for example, by laminating a fiber-reinforced resin layer on a sheet-like material made of a damping material.
- the fiber reinforced resin it is generally preferable to use a prepreg obtained by impregnating or coating a reinforcing fiber with a resin.
- a prepreg has a stronger reinforcing action in the orientation (arrangement) direction of the reinforcing fiber. Therefore, it is possible to preferably achieve a balance of the reinforcing effect by giving a change in the fiber arrangement angle of each pre-preda when laminating. You can do it.
- Such a prepredder is a main component of the aggregate of sports equipment. For example, after winding the prepredder around a core bar (such as a hollow or solid metal bar or a resin bar), the prepredder is wrapped around the core. Wrap a sheet of damping material and then, if necessary, a few ply of pre-preda. Note that any number of vibration damping material layers can be arranged at appropriate positions other than the outermost layer of the final sporting goods. Arrangement at the position of the outermost layer is not preferred in terms of strength, moldability, and the like.
- the rod-shaped material containing the core rod obtained as described above is directly heated and molded.
- the above-mentioned core rod may be used as it is as a core of the sports equipment.
- the core material in this case is made of the core material made of the material to be used practically, and the above-mentioned wrapped body is made, fitted into a mold, and heated and molded, for example, a synthetic resin tube such as nylon is used as the core material.
- a synthetic resin tube such as nylon is used as the core material.
- the pre-preda, the vibration-damping material, and the pre-preda are wound in this order, and then charged into a molding die, and simultaneously with heating, compressed air is pressed into a core tube, and the tube is pressed into a die It is molded in a shape along the line.
- a synthetic resin foamed by heating can be used as the core material.
- the resin Can be molded as it is, or loaded into a formwork and heated and foamed.
- examples of the vibration damping material having a vibration loss coefficient at room temperature of 0.01 or more include metals having a high specific gravity such as lead, elastic rubber, synthetic resin, and the like.
- the resin having the above-mentioned high specific gravity metal, ceramics, or a mixture of inorganic fillers such as graphite, graphite, and my strength can be used.
- metal particles or metal fibers made of lead, iron, copper, or the like can be used.
- the elastic rubber natural rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber, and the like can be used.
- a polyester resin a polyamide resin, a polyvinyl chloride resin, a polyvinyl acetate resin, an epoxy resin, or the like can be used.
- the vibration damping material made of elastic rubber or synthetic resin can be processed into a desired shape, for example, into various shapes such as a layer shape or a plate shape, a film shape, or a projection shape. It is also a preferred material because it can be easily laminated or composited.
- those made of a resin composition comprising an epoxy resin, a polyamide resin and an inorganic filler are particularly shock-resistant. It is preferable because it is excellent in suppressing vibration and vibration. In particular, it is very effective to use a vibration damping material that is a thermosetting material using the following (a), (b) and (c) as main raw materials.
- “has fluidity in the range from room temperature to 100 ° C.” means “any temperature within the range from room temperature to 100 ° C. (for example, 100 ° C.) 0 ° C).
- an epoxy resin ( a ) having a fluidity in the range from room temperature to 100 ° C. a resin having at least two or more glycidyl ether groups is preferable. More preferably, those having a viscosity at 25 ° C. of 1 to 300 voids, an epoxy equivalent of 100 to 500, and a molecular weight of 200 to 1000 are preferred. Specifically, for example,
- the resin (b) preferably has a viscosity at 25 ° C of 3 to 2000 voids and an amide value of 100 to 800, It is preferable because it can effectively act as a curing agent for an epoxy resin and as a flexibility-imparting agent for a cured resin.
- a viscosity at 25 ° C of 3 to 2000 voids and an amide value of 100 to 800 It is preferable because it can effectively act as a curing agent for an epoxy resin and as a flexibility-imparting agent for a cured resin.
- “Tomide # 2 25 -X”, “Tomide # 2 15 -X”, “Tomide # 2 25” Fluji Chemical Co., Ltd.
- “Varsamid 930", “Varsamid 115" aboveve, manufactured by General Mills
- "Ebon-I V15” manufactured by Shell
- Such a polyamide resin (b) acts as a curing agent for the epoxy resin (a), but is generally used to shorten the curing time and sufficiently advance the curing of the molded product.
- An epoxy resin curing agent can be used in combination.
- examples of such a curing agent include aliphatic amines such as triethyl tetramine, propanolamine, aminoethylethanolamine, P-phenylenediamine, and tris (dimethylamine).
- Aromatic amines such as methylphenol and benzylmethylamine, and carboxylic acids such as phthalic anhydride and maleic anhydride can be used.
- the amount of the curing agent to be added may be an amount sufficient for curing in consideration of an epoxy equivalent, an amine equivalent, and an acid equivalent.
- the inorganic filler (c) to be filled in these resins is preferably selected from graphite, ferrite and my strength. At least one is better.
- graphite is preferably used because of its excellent shock vibration suppression properties.
- those having an aspect ratio of 3 to 70 are preferable.
- the aspect ratio is a value obtained by dividing the diameter of particles of graphite or the like by the thickness, and particles in the above range may have excellent wettability to resin and mixing characteristics.
- the compounding amount of the polyamide resin (b) to 100 parts by weight of the epoxy resin (a) is 100 to 800 parts, more preferably 200 to 500 parts.
- the inorganic filler (c) is used in an amount of 30 to 120 parts, preferably 100 to 100 parts of the total amount of these resins (including monoglycidyl ether described below). Is from 40 to 100 parts.
- a monoglycidyl ether compound When a monoglycidyl ether compound is further added to the above-mentioned resin composition, an extremely flexible and highly processable vibration damping resin material can be obtained, and the impact vibration damping effect can be reduced. I like it because I can get excellent ones.
- a monoglycidyl ether compound having an epoxy equivalent of 80 to 400 and a molecular weight of 80 to 400 is preferably used.
- octadecyl glycidyl ether, phenyl glycidyl ether, butyl phenyl glycidyl ether, and the like can be preferably used.
- the compounding amount of this compound is preferably 5 to 45 parts, more preferably 10 to 25 parts with respect to 100 parts of the epoxy resin. The part is appropriate.
- a more preferable material as the vibration damping material in the present invention has a vibration loss coefficient of 0.02 or more in a frequency range of 50 Hz to 5 kHz at a normal temperature of 20 ° C., particularly Preferably it is greater than 0.04.
- the vibration loss coefficient is a value measured as follows.
- a 2 minimum amplitude in N D o: Decay rate of the sample adhesive plate
- V (C / C c) / 50
- thermosetting resin a material having high strength and rigidity sufficient as an aggregate for sports equipment is preferably used.
- a thermoplastic resin or a thermosetting resin can be used, but it is preferable to use a thermosetting resin because the rigidity may be high, and such a thermosetting resin is preferably epoxy resin.
- Resin, unsaturated polyester resin, phenolic resin, urea resin, melamine resin, diaryl phthalate resin, urethane resin, or Polyimide resins and mixed resins thereof can be used, among which epoxy resins and unsaturated polyester resins are particularly preferred.
- thermoplastic resins include polyamide resin, polyester resin, polycarbonate resin, ABS resin, polyvinyl chloride resin, polyacetal resin, and polyacrylate resin. , Polystyrene-based resins, polyethylene-based resins, polyvinyl acetate-based resins, polyimide-based resins and the like, and mixed resins thereof.
- These fiber reinforced resins are preferably reinforced with inorganic fibers such as metal fibers, carbon fibers, and glass fibers, and reinforced fibers such as aramid fibers and other high-strength synthetic fibers.
- These reinforcing fibers may be used alone or in a mixed system thereof for reinforcement, and may be used in the form of long fibers, short fibers or a mixture thereof.
- the vibration damping material is preferably used in the range of 1 to 5 to 100% by weight based on the total weight of the sporting equipment. In the case of a ket, although it is not necessarily limited, it seems to be better to use it within the range of 1Z7 ⁇ ⁇ / 80% by weight of the total weight of the tenis racket (including the gut). .
- the vibration damping material functions to attenuate the shock vibration very effectively and rapidly, and the sport due to fatigue of the arms, elbows, legs, etc. and shock. Obstacles can be prevented well.
- Such a shock absorbing member of the present invention further has two basic modes.
- a vibration damping material having a vibration loss coefficient of 0.01 or more is used as a first basic mode. Used And a weight of 3 g or more and a height of 3 mm or more, so that it can excite micro-vibrations or micro-oscillations following vibrations and impacts propagating from the outside of the shock absorbing member.
- at least one end is attached to the sports equipment in a free state.
- the shock absorbing member 8 according to the present invention has a throat portion. It is used by being attached near 3 etc.
- the vibration damping material having a vibration loss coefficient of 0.01 or more is the same as the damping material described as the constituent material in the first embodiment of the present invention.
- it is made of elastic rubber, various elastomers, synthetic resins, and thermosetting materials whose main raw materials are the aforementioned epoxy resin (a), polyamide resin (b), and inorganic filler (c).
- a damping material it can be added to a desired shape, for example, various shapes such as a layer shape or a plate shape, a film shape or a projection shape, and can be easily laminated or composited. I like it.
- the shock absorbing member according to the present invention can excite microvibrations or micro-oscillations following vibrations and shocks propagating from the outside of the shock absorbing member.
- the micro-vibration or micro-oscillation When the micro-vibration or micro-oscillation is excited, the micro-vibration or micro-oscillation is generated while causing a slight misalignment between the impact vibration actually applied to the sports equipment and the slight timing. Departure This has the effect of generating and canceling out the original vibrations, and ultimately has the effect of absorbing and diverging the added original vibrational energy and instantaneously reducing it. is there.
- the shock absorbing member has a certain height or more and a certain weight or more. From this point of view, the sporting equipment handled in this category weighs at least 3 g and has a height of at least 3 mm, and the manner in which it is worn is transmitted from the outside of the shock absorbing member. It is important that at least one end is mounted in a free state so that microvibration or micromotion can be excited following vibration or impact.
- the position at which the sports equipment is worn is not particularly limited, but it is generally preferable to wear the sports equipment near the center of gravity of the sports equipment.
- the sports equipment near the center of gravity of the sports equipment.
- there is generally a center of gravity near the throat portion so it is preferable to provide it near the throat portion.
- it may be mounted near other frame parts, or may be mounted on a gut, and mounting on this gut has a considerable effect.
- the shock absorbing member has a weight of 3 g or more and a height of 3 mm or more, and the manner of mounting the shock absorbing member is Micro-vibrations or micro-oscillations are excited following vibrations and shocks propagating from outside
- the shock absorbing member has a weight of 3 g or more and a height of 3 mm or more
- the manner of mounting the shock absorbing member is Micro-vibrations or micro-oscillations are excited following vibrations and shocks propagating from outside
- the damping material be used in the range of 1Z5 to 1Z100 relative to the total weight of the sports equipment, including for other sports equipment.
- the vibration damping material is made of a single or a plurality of rubber-like elastic bodies, and the rubber-like elastic body has a 50% modulus of 0.
- the shock absorbing member according to the present invention comprises a single or plural rubber-like elastic bodies having a 50% modulus value of 0.5 to 200 kg / cm 2 . It is a combination of materials and metals and / or various resin materials. In particular, by adopting such a combination structure, it is possible to obtain a shock absorbing member having excellent microvibration excitation performance.
- FIGS. 9 to 12 show explanatory views of the basic principle of the shock absorbing member of the present invention and various examples of shapes and structures of the first embodiment.
- the configuration of the present invention will be described with reference to FIG. 9.
- micro vibration excitation members 9 and 10 are provided on the surface of a vibration source object 11 (such as a rug).
- the connected body of these micro vibration excitation members 9 and 10 is the shock absorbing member according to the present invention, and the vibration impact vibration from the vibration source object 11 (such as a luggage) which is vibrating in this embodiment. Exciting micro-vibration or micro-oscillation while actually causing a slight timing deviation, and acting to cancel the original vibration, absorbing and reducing vibration energy .
- FIG. 10 all explain the mode of the micro-vibration excitation member directly attached to the vibration source object 11, and (a) of FIG.
- the member 12 is made of a single material, and the figures (b) and (c) show the micro-vibration excitation member 14 in combination with the micro-vibration excitation member 14 like the micro-vibration excitation member 13. Indicates that it is composed of. That is, in the figures (a) to (c), the hatched portions indicate that the material is a single micro-vibration excitation material, and the figures (b) and (c) both show a two-component material.
- the micro-vibration excitation member is constituted by a combination of a plurality of micro-vibration excitation members in the present invention.
- the entirety of the microvibration exciting member is a shock absorbing member.
- the shock absorbing member may be a vibration source object. 11, as shown in FIGS. 10 (a) and (b), has a height H in the vertical direction and H is larger than the contact width with the vibration source 11, or As shown in FIG. 10 (c), the height H ′ in the vertical direction and the H may be smaller than the contact width with the vibration source 11 or the like. It is important that H and H 'be at least 3 mm.
- FIGS. 11 (a), (b) and (c) are all variants of the one shown in FIG. 10 and are more efficient than those of FIG.
- FIG. 11 (a) shows a configuration in which the lower end 16 of the member 15 is narrowed down
- FIG. 11 (b) shows a configuration in which the member is composed of a combination of 14 and 17.
- the lower end of the member 17 has a thin three-legged shape.
- FIG. 11 (c) shows an embodiment in which three thin connecting members 18 are provided at the lower end of a horizontally elongated member 14.
- These members 15, 17, and 18 are preferably made of a single material that is a specific damping material, and the member 14 is preferably made of another damping material.
- the present invention describes still another embodiment, in which a slit-like or uneven shape is added to the side surface or a part of the surface of the shock absorbing member, and excitation of micro-vibration is more efficient. It shows an example of an embodiment that can be made.
- Fig. 12 (a) shows the projections 19, 20 etc. provided on the side surfaces of the member 15;
- Figs. 12 (b) and (c) show the member main bodies 21 and 2
- the slit-shaped portions 23, 24, 25 are vertically or horizontally assembled with respect to 2.
- the members 23, 24, and 25 are made of a different material from the members 21 and 22, respectively, or have appropriate dimensions, etc., so that the vibration source member 11 is more suitable for vibration. This allows microvibration excitation to follow.
- members 23, 24, and 25 have appropriate changes in their length, thickness, surface area, weight, rigidity, and protrusion length of members 21 and 22 from the side (wall) of the vibration source object. Metal and / or various resin materials can be used.
- the second basic mode of the shock absorbing member of the present invention which is used by being attached to a conventional sporting tool is, as in the case of the above, also having the same weight as described above.
- a micro-vibration excitation member having a height of 3 g or more and a height of 3 mm or more and capable of exciting micro-vibration or micro-vibration in response to externally transmitted vibration or impact; and And a load member having a specific gravity of 1.2 or more bonded to the micro vibration excitation member.
- the shock absorbing member according to the present invention has the first basic state described above. Like the above shock absorbing members, the micro vibration of the micro vibration excitation member has the effect of instantly vibrating the original shock vibration so as to cancel it.
- the micro vibration excitation member mainly has the same function and effect as the vibration damping material in the first embodiment described above, but in the second embodiment, Since a load material with a specific gravity of 1.10 or more is combined, it is easy to excite micro-vibration or micro-oscillation following vibrations and shocks transmitted from the outside, and the vibration loss coefficient is reduced accordingly. It is not always necessary to have more than 0.01. In order to exert such an effect, it is important that the load material has a specific gravity of 1.10 or more. However, in order to excite the micro-vibration or micro-vibration well, the micro-vibration excitation member must have a weight of 3 g or more and a height of 3 mm or more. In this case, in this case, the weight and height do not include the load member W. (The micro vibration excitation member may have a vibration loss coefficient of 0.01 or more, and it is more preferable. Things.
- FIGS. 13 (a), (b), (c), FIGS. 14 (a), (b) show various examples of shapes and structures of the second basic embodiment of the shock absorbing member of the present invention. Shown in
- Fig. 13 (a), (b) and (c) all follow the vibration and impact propagating from the vibration source object 11 (such as luggage). Then Combination of micro-vibration excitation members 26, 27, 28, 29 that excite vibration or micro-motion, and a load material W connected to this and made of a material with a constant specific gravity
- a shock absorbing member according to the present invention is configured, wherein in this embodiment, one end of the load member W is substantially in an unconstrained state, and the micro vibration excitation member 2 is provided. 6, 27, 28, 29 micro-vibrations or micro-oscillations can be excited more effectively.
- FIGS. 14 (a) and (b) show the micro vibration or micro vibration effectively depending on how the micro vibration excitation members 30, 31 and 32 are attached to the vibration source object 11 in particular. It shows an example of a mode in which swinging can be caused to occur. That is, the plate-like members 31 and 32 are made of a suitable material such as a rubber-like elastic body or an elastomer, and are attached to the vibration source object 11 so as to be horizontal or arcuate. Accordingly, it is possible to configure a micro-vibration excitation member capable of effectively generating micro-vibration or micro-vibration sensitively following vibration from a vibration source. Even when this plate-shaped member is provided, the height of the micro vibration excitation member is measured from the side wall of the vibration source object 11.
- the micro-vibration excitation member may be made of a material that can excite micro-vibration following vibration transmitted from a vibration source, and is not particularly limited.
- the 50% modulus value of the rubbery elastic body is 0.5 to 200 kgcm2
- organic elastomers such as, for example, polyvinyl chloride, polyurethane, polyamide, polystyrene, ethylene vinyl acetate copolymer, and ethylene elastomer Rubber elastomers such as acrylates, polyolefins, polyesters, epoxys, and other resins
- polystyrene-based is, for example, natural rubber, styrene butane diene rubber, nitrile rubber, isoprene rubber, hydrin rubber, cuproprene rubber, and the like can be used.
- Polyurethane-based, polystyrene-based, polyethylene-based, fluorine-based, EVA-based, phenol-based, PVC-based, and polycarbonate-based resins can be used.
- the method of measuring the 50% modulus is measured according to the vulcanized rubber physical test method of JISK-6301, and specifically, Using a No. 3 dumbbell-shaped test piece with a thickness of 4 mm, read the load when 50% elongation was applied to the test piece, and read the 50% by the following formula. This is to calculate the modulus (M 50 ).
- a Specimen cross section (cm 2 ) The impact absorbing member of the second basic aspect is also used in the same manner as the impact absorbing member of the first basic aspect described above.
- the sports equipment it is generally preferable to wear the sports equipment near the center of gravity of the sports equipment.
- a weight in the range of 1 to 80 of the total weight of the rack (including the gut).
- the damping material be used in the range of 1Z5 to 1/100 relative to the total weight of the sports equipment, including for other sports equipment.
- the mounting method is as follows: bonding using an adhesive or a fixing agent, appropriate bonding means such as sticking means or fixing means, or rubber bands, etc. are attached to the shock absorbing member. It may be attached to sports equipment by the joining / attachment means only at the time of use.
- the above-described shock absorbing member may be attached to a conventional golf club as an attachment, as a matter of course. In this case, as shown in the model in Fig. 15, it is better to install it near the grip or near the center of gravity of the golf club.
- the sports equipment obtained by the present invention and the sports equipment to which the shock absorbing member according to the present invention is attached have a coefficient of 0.01 when the sports equipment itself is measured by an apparent vibration loss coefficient measuring method described later. Above Of course, it shows a value of 0.03 or more or 0.04 or more, and realizes the use of the above-mentioned various sporting tools with an excellent impact reduction effect.
- Fig. 16 shows a model diagram when mounted on a ski.
- Fig. 17 shows a model diagram when it is mounted on a baseball or other baseball.
- Fig. 18 shows a model diagram of a fishing rod attached to a fishing rod. In these figures, a method of measuring the apparent vibration loss coefficient of the sports equipment itself is also described, as described later.
- Measurement method of apparent vibration loss coefficient of racket Microacceleration is placed at the center of the grip of a racket such as a sample racket according to the present invention or a sample racket equipped with a shock absorbing member. Attach the pick-up, tap the end of the frame with a hammer in that state, measure the attenuation waveform of the vibration with an FFT analyzer (manufactured by Ono Sokki Co., Ltd.), and measure the waveform with a micro computer. Calculate the vibration loss coefficient (7?) According to the calculation of MIL-P-2 2 5 8 1 B
- a shock absorbing member 44 and an acceleration pick-up 48 are attached to the suspension 45, and the suspension is attached. 45
- the thread guide at the tip was lightly hit with a hammer 46, and the vibration loss coefficient was calculated in the same manner as in the racket for the rest. The measurement was carried out by suspending the sample at two places with a string suspender 47.
- glass fibers made of E glass and carbon fibers are used in a weight ratio of 80:20, and epoxy resin is used for the fiber weight ratio of 65%.
- the basis weight was 350 g.
- Two unidirectional pre-predesheets were stacked in the direction of ⁇ 45 ° to form a 90 ° orthogonal prepreg sheet.
- the following resin composition was spread and cured to obtain a resin sheet of a 0.2 band-thinning vibration damping material.
- This resin sheet was cut into a rectangle of 25 ⁇ 800 mm.
- the weight of the sheet was 5.6 g.
- the prepreg sheet was cut into a rectangle of about 350 x 160 Omm and wound around a core of a nylon film tube.
- the resin sheet was disposed so as to be the second layer from the outside and at the center of the tube, thereby forming a tube-stacked laminate.
- this tubular laminate was charged into a tennis rack mold and placed in a curing oven at 130 ° C.
- compressed air was injected into the nylon tube and cured for 2 hours, and then the molded product was removed from the mold.
- the molded product obtained in this way had a good appearance without freckles and voids.
- a grip was attached to make a tennis racket.
- the weight of the bucket was 355 g.
- the apparent vibration loss coefficient of this rack was measured and found to be 0.022 at a resonance frequency of 137.5 Hz at 20 ° C.
- the shot feeling when using this racquet was that the impact vibration transmitted to the wrist and elbow was extremely small compared to the commercially available racquet and those of the comparative examples described later, so that the bat could be hit comfortably. .
- Example 1 For a comparative example, a tennis racket made of a fiber-reinforced resin having a conventional structure was manufactured in the same manner as in Example 1 except that the vibration-suppressing material sheet was not laminated (Comparative Example 1).
- the weight of this racket was 349 g.
- the apparent vibration loss coefficient of this rack was measured and found to be 0.007 at a resonance frequency of 142.5 Hz at 20 ° C.
- the shot feeling when using this racket was uncomfortable because the vibration transmitted to the wrists and elbows was large.
- a resin sheet having a thickness of 150 made of the following resin composition was produced.
- Epoxy resin 13.6 parts (epikoto # 28, made by Yuka Shiro)
- Tris (Dimethyl Rmino) til phenol 8 parts Graphite 500 parts The vibration loss coefficient of this resin composition itself at 20 ° C was measured for a 10 mm thick sample resin (damping material). The result was 0.04 in the frequency range from 50 Hz to 5 KHz o
- a carbon fiber bundle having a total fineness of 330 denier (D) is arranged so as to have a basis weight of 1339 g Z nf, and epoxy resin is added to this 207 g Z nf co A prepreg obtained by singing was cut so that the arrangement direction of the carbon fibers was biased (prepreg A).
- a carbon fiber bundle with a total fineness of 3600 D is laid out so as to have a basis weight of 150 g ZnH, and epoxy resin is coated on this with 24 g gnf coating.
- the prepreg obtained in this manner was prepared by cutting the carbon fibers in a straight and short dimension in the arrangement direction of the carbon fibers (prepreg B).
- the prepreg A is wound around a core bar made of a steel metal bar coated with a fluorine-based release agent by 6 plies, and then the resin sheet of the vibration damping material is wound by 1 ply.
- a laminate was made by winding prepreg B around four plies (Example 2).
- the resin sheet of the vibration damping material is wrapped around a core bar similar to the above, then the prepreg A is wrapped with 6 ply, and the prepreg B is further wrapped with 4 brushes.
- a laminate was made (Example 3).
- the prepreg A was wound around the core bar of 6 ply, the prepreg B was wound around 4 ply, and finally, the resin sheet of the vibration damping material was wound around 1 ply to form a laminate.
- Example 4 the prepreg A was wound around the core bar of 6 ply, the prepreg B was wound around 4 ply, and finally, the resin sheet of the vibration damping material was wound around 1 ply to form a laminate. Example 4).
- the above five types of laminates were placed in a high-temperature type thermostat, heated at 135 ° C for 2 hours to cure the epoxy resin and molded, and the metal rods were pulled out of the molded product, and each of the five The material for golf club shaft was obtained.
- the results of measuring the apparent vibration loss coefficients of these golf club shaft materials are as shown in Table 1.
- the apparent vibration loss factor in this case is the resonance frequency at 20 ° C. It is a numerical value at 250 Hz.
- Example 5 As can be seen from the results of Examples 2 to 5, especially The material of Example 5 showed an excellent shock vibration damping effect.
- Table 2 shows the flexibility performance of each microvibration excitation member as a 50% modulus value.
- a shock absorbing member composed of these combined structures is adhered to the inside of the shaft of a commercially available tennis racket (Y-NEX Corp., trade name: R-22), and in each case, the vibration loss coefficient of the racket Table 2 shows the results obtained.
- the material of the vibration damping material is a micro vibration excitation member 52, 5
- the same material was used.
- four types of the materials were prepared using various types of polyurethane resins having different degrees of polymerization, each having a different 50% modulus value.
- the vibration loss coefficients of the respective polyurethane resins were 0.03, 0.04, 0.03, and 0.02.
- the total weight of the shock absorbing member was designed to be 15 g.
- This shock-absorbing member which is a combination of the same material, is attached to the tennis racket in the same manner as in Examples 6 to 11, and the vibration loss coefficient of the racket is measured by the method described above. Performed in
- the vibration loss coefficient of the bucket in each case is as shown in Table 3.
- a micro vibration excitation member (vibration loss coefficient: 0.03, height H: 2 to 5 mm, weight: 10 to 15) is used as a thermoplastic polymer.
- urethane resin elastomer epoxy Z polyamide resin compound resin is used for the load material W (disc shape of specific gravity: 1.21, diameter: 9 mm, height: 2 mm).
- a shock absorbing member was manufactured using a base material kneaded with metal powder. The weight of the micro vibration excitation member was designed and manufactured so as to be in the range of 10 to 15 g.
- the vibration loss coefficient was measured by changing the height of the neck portion of the microvibration excitation member and mounting it on the rack in the same manner as in Examples 6 to 11 to determine the resin hardness (50% modulus) and The change of the apparent vibration loss coefficient of the racket by changing the neck height (mm) of the micro vibration excitation member was investigated.
- Table 4 shows that there is an appropriate vibration loss coefficient value when the height of the micro vibration excitation member is 3 mm or more.
- Table 4 shows that there is an appropriate vibration loss coefficient value when the height of the micro vibration excitation member is 3 mm or more.
- extremely good loss factors are obtained at a height of 3 mm or more.
- polyurethane a good loss factor was obtained at a height of 4 mm or more.
- the shock absorbing member 49 of the embodiment shown in FIG. 19 was produced.
- the microvibration excitation member 51 has a height H of 3 mm using a thermoplastic polyurethane resin elastomer, a weight of 2 to 12 g, and a vibration loss coefficient of 0.0. Three things.
- the load material 50 is made of an epoxy resin as a base material and kneaded with metal powder, and has a specific gravity of about 30.
- the vibration absorbing member 49 is attached to the golf club just below the lip 33 of the golf club 34 (using a wood and a driver's shaft).
- the golf club was mounted on a golf club and the apparent vibration loss coefficient of the golf club was measured.
- the number of impact vibration absorbing members mounted on the golf club shaft was one.
- the height ⁇ of the micro-vibration excitation member is 3 mm as described above, and the micro-vibration excitation member and the load material are appropriately designed, so that the total weight of the micro-vibration excitation member is 2 to 12 g.
- a shock absorbing member 49 of the embodiment shown in FIG. 19 having a total weight of 15 g was prepared.
- the micro vibration excitation member is made of polyurethane elastomer, the height H is 3 mm, the weight is 1 Og, and the load material W is 1.30.
- the shock absorbing member having a total weight of 15 g was obtained by combining the micro vibration excitation member and the load material as the shape-reducing member shown in FIG.
- the members 36, 36 are located at a point A on the commercially available ski 40 where the curved end portion ends and becomes linear, or near the center B thereof. Attach a micro acceleration pick-up (39 in the figure) to the center of the step stool and tap the tip of the ski with a hammer 38 to determine the vibration loss coefficient of Example 1. It was determined based on the measurement method. The results are as shown in Table 6.
- the shock absorbing members used in Examples 23 and 24 were prepared. As shown in FIG. 17, one or two of these were attached to a commercially available metal bag, and the apparent vibration loss coefficient was measured by the method described above. The results are as shown in Table 7.
- the shock absorber having the shock absorbing member according to the present invention exhibited a remarkable remarkable shock damping effect of 4 to 6 times as compared with the case without the shock absorbing member. Was done.
- shock absorbing members used in Examples 25 and 26 were prepared, and as shown in FIG. 18, these were attached to commercially available throwing rods and lure fishing rods, and the method described above was used. The apparent vibration loss coefficient of the suspension was measured.
- the present invention has a similar effect to a novel sports device that can significantly reduce shocks and vibrations transmitted to the user's body such as arms and legs when using the sports device.
- An object of the present invention is to provide a novel shock-absorbing member which is used by being appropriately attached to sports equipment having the same.
Landscapes
- Physical Education & Sports Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Engineering & Computer Science (AREA)
- Golf Clubs (AREA)
- Laminated Bodies (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910700425A KR920700722A (ko) | 1989-08-28 | 1990-08-27 | 스포츠용구 및 스포츠용구에 장착되어 사용되는 충격흡수부재 |
DE69025588T DE69025588T3 (de) | 1989-08-28 | 1990-08-27 | Sportgut und schockabsorbierendes material darin |
EP90912516A EP0441971B2 (en) | 1989-08-28 | 1990-08-27 | Sporting goods and shock absorbing material used by being fitted to the sporting goods |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1/220632 | 1989-08-28 | ||
JP22063289 | 1989-08-28 | ||
JP2015859A JPH03221079A (ja) | 1990-01-25 | 1990-01-25 | ゴルフクラブ |
JP2/15859 | 1990-01-25 | ||
JP2026431A JP2576251B2 (ja) | 1990-02-06 | 1990-02-06 | 中空衝撃緩衝材およびそれからなる打具 |
JP2/26431 | 1990-02-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991003284A1 true WO1991003284A1 (fr) | 1991-03-21 |
Family
ID=27281167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1990/001084 WO1991003284A1 (fr) | 1989-08-28 | 1990-08-27 | Articles de sport et materiau amortissant les chocs applique sur les articles de sport |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0441971B2 (ja) |
KR (1) | KR920700722A (ja) |
CA (1) | CA2039712A1 (ja) |
DE (1) | DE69025588T3 (ja) |
WO (1) | WO1991003284A1 (ja) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2684013B1 (fr) * | 1991-11-25 | 1994-10-28 | Rossignol Sa | Raquette pourvue d'un dispositif d'amortissement des vibrations. |
FR2684560B1 (fr) * | 1991-12-04 | 1994-10-28 | Rossignol Sa | Raquette pourvue d'un dispositif d'amortissement des vibrations. |
TW286290B (ja) * | 1992-07-16 | 1996-09-21 | Minnesota Mining & Mfg | |
EP0790847B1 (en) * | 1993-05-17 | 2006-06-14 | Steven C. Sims, Inc. | Vibration damping |
BE1009068A3 (nl) * | 1995-02-01 | 1996-11-05 | Yamipa Consulting Bv | Racket. |
FR2737127B1 (fr) * | 1995-07-27 | 1997-08-22 | Rossignol Sa | Club de golf presentant un dispositif amortisseur de vibrations |
CA2357331C (en) | 2000-09-15 | 2010-07-20 | Jas D. Easton, Inc. | Hockey stick |
US7963868B2 (en) | 2000-09-15 | 2011-06-21 | Easton Sports, Inc. | Hockey stick |
US6500079B1 (en) | 2000-11-07 | 2002-12-31 | Stx, Llc | Sports equipment handle |
FR2822715B1 (fr) * | 2001-03-29 | 2003-05-16 | Rossignol Sa | Raquette de tennis ou de squash |
DE10308533A1 (de) | 2003-02-27 | 2004-09-16 | Head Technology Ges.M.B.H. | Schläger für Ballspiele |
US7232386B2 (en) | 2003-05-15 | 2007-06-19 | Easton Sports, Inc. | Hockey stick |
DE102004010349B4 (de) * | 2004-03-03 | 2006-03-09 | Head Technology Gmbh | Schläger für Ballspiele und Herstellungsverfahren |
DE102006004850B3 (de) | 2006-02-02 | 2007-10-04 | Head Technology Gmbh | Dämpfungsvorrichtung für Ballspielschläger |
US7914403B2 (en) | 2008-08-06 | 2011-03-29 | Easton Sports, Inc. | Hockey stick |
JP2021194142A (ja) | 2020-06-11 | 2021-12-27 | 住友ゴム工業株式会社 | ラケット |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4915534A (ja) * | 1972-04-05 | 1974-02-12 | ||
JPS4956738A (ja) * | 1972-06-08 | 1974-06-01 | ||
JPS5221936A (en) * | 1975-08-13 | 1977-02-18 | Toray Ind Inc | Tennis racket frame |
JPS5818252A (ja) * | 1981-07-08 | 1983-02-02 | ゲオス・コ−ポレイシヨン | 衝撃吸収材及びその製造方法 |
JPS61203985A (ja) * | 1985-03-05 | 1986-09-09 | 株式会社ブリヂストン | ラケツトフレ−ムのヨ−ク部材 |
JPS63164968A (ja) * | 1986-12-22 | 1988-07-08 | スキー・ロシニヨル・エス.エイ | テニスラケツト |
JPS63212514A (ja) * | 1985-05-31 | 1988-09-05 | Sumitomo Rubber Ind Ltd | 構造材料およびその製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3537717A (en) * | 1968-11-29 | 1970-11-03 | Minnesota Mining & Mfg | Damped ski and method of making |
DE2805314A1 (de) † | 1978-02-06 | 1979-08-09 | Benno Prof Dr Krieg | Ballschlaeger, insbesondere tennisschlaeger |
US4212461A (en) * | 1978-07-10 | 1980-07-15 | Fansteel Inc. | Composite high strength to weight structure having shell and weight controlled core |
JPS6037810B2 (ja) † | 1978-12-08 | 1985-08-28 | 東邦レーヨン株式会社 | ストランドプリプレグ組成物 |
US4627635A (en) † | 1983-09-20 | 1986-12-09 | Koleda Michael T | Vibration damping units and vibration damped products |
US4684131A (en) † | 1984-06-14 | 1987-08-04 | Ektelon | Graphite composite racquet with aramid core |
EP0262891B1 (en) * | 1986-09-30 | 1996-12-27 | Toho Rayon Co., Ltd. | Resin composition of thermosetting resin and thermoplastic resin |
AT391088B (de) * | 1988-05-26 | 1990-08-10 | Head Sportgeraete Gmbh | Ski mit daempfungslagen |
-
1990
- 1990-08-27 DE DE69025588T patent/DE69025588T3/de not_active Expired - Fee Related
- 1990-08-27 CA CA002039712A patent/CA2039712A1/en not_active Abandoned
- 1990-08-27 KR KR1019910700425A patent/KR920700722A/ko not_active Application Discontinuation
- 1990-08-27 WO PCT/JP1990/001084 patent/WO1991003284A1/ja active IP Right Grant
- 1990-08-27 EP EP90912516A patent/EP0441971B2/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4915534A (ja) * | 1972-04-05 | 1974-02-12 | ||
JPS4956738A (ja) * | 1972-06-08 | 1974-06-01 | ||
JPS5221936A (en) * | 1975-08-13 | 1977-02-18 | Toray Ind Inc | Tennis racket frame |
JPS5818252A (ja) * | 1981-07-08 | 1983-02-02 | ゲオス・コ−ポレイシヨン | 衝撃吸収材及びその製造方法 |
JPS61203985A (ja) * | 1985-03-05 | 1986-09-09 | 株式会社ブリヂストン | ラケツトフレ−ムのヨ−ク部材 |
JPS63212514A (ja) * | 1985-05-31 | 1988-09-05 | Sumitomo Rubber Ind Ltd | 構造材料およびその製造方法 |
JPS63164968A (ja) * | 1986-12-22 | 1988-07-08 | スキー・ロシニヨル・エス.エイ | テニスラケツト |
Non-Patent Citations (1)
Title |
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See also references of EP0441971A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE69025588T3 (de) | 2001-09-06 |
DE69025588D1 (de) | 1996-04-04 |
CA2039712A1 (en) | 1991-03-01 |
EP0441971B1 (en) | 1996-02-28 |
EP0441971A1 (en) | 1991-08-21 |
EP0441971B2 (en) | 2001-04-18 |
KR920700722A (ko) | 1992-08-10 |
DE69025588T2 (de) | 1996-09-05 |
EP0441971A4 (en) | 1992-09-30 |
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