JPH08206262A - Grip structure of sporting goods - Google Patents

Abstract

PURPOSE: To prevent the slip by drain drops and sweat while well maintaining the feel when a player holds a grip of sporting goods by compounding an elastic resin with the grip, applying an adhesive on the surface thereof, and subjecting the circumferential surface of the grip compounded with this elastic resin to electrostatic flocking. CONSTITUTION: The surface of a cover material 1 is first polished by a rotary brush 2 to increase the adhesive area for the adhesive (a). This cover material 1 is formed of rubber or other resin blanks and a primer is applied on the surface of the polished cover material 1. The adhesive is then applied on the surface of the cover material 1 (b). While the cover material 1 is rotated in an electric field, the surface is flocked with piles 5 (c). After the flocking on the cover material 1 ends, the cover material 1 is dried by a heating device 10 (d), and is cooled (e) by the cold air from a nozzle 11. The cover material 1 is brushed in a water tank 12 and the remaining piles which are not adhered are removed (f). The final product is thus obtd. (g).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip structure for exercise equipment, and more particularly to a technique for enhancing the grip performance of a golf club or the like.

[0002]

2. Description of the Related Art A sports equipment such as a golf club or a tennis racket swings with a hand, so that it is provided with a slip stopper for playing in sweat or in the rain.

Conventionally, as such a technique for preventing slippage, there is known a technique in which a rubber or synthetic resin cover material provided on a grip is provided with a large number of irregularities (Japanese Patent Laid-Open No. 6-2.
05861). This is because a large number of minute irregularities increase the coefficient of friction and enhance the anti-slip effect especially in rainy weather.

There is also a technique of knitting a fiber material and arranging it in a grip (JP-A-6-57601). This is to provide a non-slip member that is highly stretchable by forming a loop stitch with polyurethane elastic yarn.

[0005]

However, these conventional grip structures for exercise equipment have the following drawbacks. First, although a means for providing unevenness on the rubber cover material of the grip (Japanese Patent Laid-Open No. 6-205861) certainly increases the friction coefficient, there are many cases where such a grip cover cannot provide a reliable anti-slip effect. This is because if the grip gets wet with raindrops or sweat, the rubber material (or the seal cloth) becomes slippery even if it has irregularities, and it makes it difficult to perform a normal (or ideal) swing such as stickiness. For this reason, the higher the technical level (professionals, etc.), the more likely there is a tendency to dislike such uneven rubber (skid member). In many cases, gloves are used for playing, but this is because an anti-slip member (seal or the like) provided on the grip cannot provide a sufficient anti-slip effect.

On the other hand, the technique of knitting a fiber material and arranging it in the grip (Japanese Patent Laid-Open No. 6-57601) can be used in gloves, socks, etc., but when it is used in the grip of a golf club or a tennis racket. , It is possible to prevent slippage due to raindrops and sweat, but on the contrary, the stitches are misaligned during the swing, which is likely to interfere with accurate play.

Therefore, an object of the present invention is to reliably prevent slipping due to raindrops or sweat while maintaining a good feel when grasped.

[0008]

In order to achieve the above object and achieve the object, a grip structure of an exercise tool according to the present invention has an elastic resin disposed on the grip and an adhesive is applied to the surface of the elastic resin. Electrostatic flocking is applied to the peripheral surface of the grip with elastic resin. In order to enhance the fit when gripped, the pile used for electrostatic flocking has a fiber cross-sectional diameter of 10 to 20 denier and a fiber length of 0.3 to 0.8.
May be in millimeters. Further, the exercise equipment here includes the cover material itself applied to the grip (claim 3).

[0009]

The grip structure for exercise equipment according to the present invention is characterized in that electrostatic flocking is generally performed on the grip portion. At this time, in the present invention, an elastic resin is arranged on the grip in order to improve the fit feeling when gripping the grip. The elastic resin is made of rubber or other resin-based material. Although it may be integrally molded with the exercise equipment body, it may be molded and fitted as a separate part from the club shaft and the racket body.
Electrostatic flocking is performed on the surface of elastic resin. According to electrostatic flocking, raindrops and sweat enter the gaps between short fibers (pile),
The palm holding the grip is in a state of being supported by the tip of the pile, that is, in a state of point contact.
As a result, the coefficient of friction increases dramatically, and reliable swinging and playing are possible even in the rain.

The grip surface with electrostatic flocking has a pile (short fiber) in a raised state, and it has a feel similar to that of a carpet in a metaphorical sense, but it is sufficient if the bristle is too short. If the hair is too long, the pile with straight bristles tilts in the direction of force, and the point contact may become a surface contact, failing to provide a secure fit. Therefore, in order to solve such a problem, the pile has a fiber cross-sectional diameter of 10 to 20 denier and a fiber length of 0.3 to
0.8 mm. Under this condition, it is possible to remarkably improve the fit feeling when grasped while maintaining a reliable anti-slip effect.

The exercise equipment according to the present invention also includes a cover material applied to the grip portion. As described above, this cover material enhances the fit feeling at the time of grip, but when the cover material is fitted on the grip of a golf club or a tennis racket, the cover material extends by about 5% and the surface area increases. Therefore, the adhesive applied to the cover material should be one that is strong in elongation.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 illustrates a manufacturing process of a resin cover material arranged on a grip of a golf club. First, the surface of the cover material 1 is polished by the rotating brush 2 to increase the adhesive area of the adhesive (a). The cover material 1 is molded from rubber or other resin material. The rotating brush 2 uses, for example, an iron wire brush. Next, a primer is applied to the surface of the polished cover material 1. The primer is applied by dipping (immersion), for example. Of course, application by spraying a primer may be used. For example, a chlorine-based vulcanizing agent is used as the primer.

Next, an adhesive is applied to the surface of the cover material 1 (b). Reference numeral 4 is an adhesive ejection nozzle. The adhesive used here is an adhesive that can follow the expansion of the elastic resin in consideration of expansion when the cover material 1 is fitted to the grip end. For example, polyester-based urethane resin emulsion and the like. The type is not particularly limited as long as it is an adhesive that can follow the elongation of the cover material 1.

Next, while the cover material 1 is rotated in an electric field, the pile 5 is planted on the surface (c). Reference numeral 6 is a case containing short fibers (pile) as a material, and 7 is this case 6
The vibrator 8 vibrates the pile 5 and the net 8 makes the pile 5 fall evenly. This method is a so-called down type. Usually, an up / down type in which piles 5 are planted from the upper and lower sides is preferable, but if the weight per pile is large, it is difficult to form a uniform pile density in the electric field, and thus such a down type is considered preferable. The vibrator 7 does not necessarily have to be used as a means for equalizing the density of the piles dispersed in the electric field, and for example, a pinch roller-shaped delivery device may be used to make the density of the piles even. .

Further, in the usual electrolytic hair transplantation, as shown in FIG. 2, the pile is transplanted by the Coulomb force of the plus pole and the minus pole, but since the cover material 1 has a substantially cylindrical shape, it is necessary to implant the hair at 360 degrees. is there. Therefore, in order to maximize the wraparound of the pile 5, for example, as shown in FIG. 3, a positive pole of the ground is generated on the side portion of the cover material 1 and the repulsive force between the negative poles is used. However, in the case of using such repulsive force, there is scattering of the pile, so in order to improve the working environment, it is desirable to prevent the scattering of the pile by utilizing the fall due to gravity. In this case, the cover material 1 is rotated in the electric field due to the Coulomb force and the hair is planted.

The pile 5 (short fibers) used for flocking has a fiber cross-sectional diameter of 10 to 20 denier and a fiber length of 0.3 to 10.
Use in the range of 0.8 mm. If the pile 5 is within this range, a sufficient anti-slip effect is exhibited, and the feel (fitting feeling) when gripped is also preferable.

The thickness and length of the piles, even if they are numerically slightly different, feel very different when used in the grip of exercise equipment. This is because the entire palm of the hand feels the tip of the pile, and the smaller the cross-sectional diameter of the pile, the smoother the hand feels. On the contrary, if the pile is too thick, the pile feels stiff and the fit is impaired. However, as the pile becomes thinner, the flocking rate increases, so if the cross-sectional diameter of the pile is too small, the coefficient of friction becomes small and the feel is velvety, but there is the problem that the anti-slip effect is reduced.

If the pile is too short, a rough feeling is produced, and if the pile is too long, the hand is shaken due to the bending of the short fibers. Therefore, the pile 5 has a fiber cross-sectional diameter of 10 to 20 denier and a fiber length of 0.3 to 0.8.
Millimeters (more preferably 0.6 millimeters or less) are set to solve these problems. Although such a feel (fitness) varies depending on individual differences and competition events, for example, in the case of golf clubs, the pile 5 considered to be most preferable has a fiber cross-sectional diameter of 14 denier and a fiber length of 0.5 mm. It was a thing. This is because even if the grip gets wet with water, it does not slip and an accurate shot is possible. The material of the pile 5 is not particularly limited. For example, nylon, polyester, acrylic, polyurethane and the like.

After the flocking of the cover material 1 is completed,
The cover material 1 is dried by the heater device 10 (d), cooled by cold air from the nozzle 11 (e), and brushed in the water tank 12 to remove the unbonded residual pile (f). The final product is thus obtained (g).

By the way, the drying treatment (d) of the cover material 1 is carried out mainly for the purpose of drying the adhesive, and the adhesive applied to the base end portion of the pile depends on the size (cross-sectional diameter and length) of the pile covering the surface. The transmission of heat to is different.
According to the experiment, the thinner and shorter the pile 5 is, the better the heat transfer is, which causes a problem such as generation of bubbles between the surface of the cover material and the adhesive. In order to solve such a problem, when the pile 5 to be transplanted is set to be thin and short, it is possible to obtain a good result by dividing the drying process (d) into two stages.

It is difficult to set the drying treatment time uniquely because the thermal conductivity of the pile differs depending on the kind of material, but for example, a nylon type pile is used and its cross-sectional diameter is 14 denier and length. When the thickness is set to 0.4 mm, the drying process (d) is divided into two steps, and the first drying process (primary cure) and the second drying process (second Good results were obtained by providing an interval (adhesive solidification curing time) between the subsequent curing).

Therefore, when the pile is thin and short, for example, the cross-sectional diameter is 12 to 15 denier and the pile length is 0.3 to 0.6 m.
In the case of m, it is 5 to 1 under the condition of 80 to 100 ° C.
A primary cure of 0 minutes is performed, and an interval is set here. As the interval condition, for example, forced air blowing for about 15 minutes is performed at room temperature all day and night, or when the atmospheric temperature is low such as in winter. Of course, this condition may be appropriately set and changed according to the material and length of the pile or the type of adhesive. The secondary cure is, for example, 135 to 15
Heat treatment is performed for 20 to 30 minutes under the condition of 0 ° C. The heating temperature of the secondary cure does not necessarily follow this temperature condition, because the purpose is to shorten the processing time exclusively. The temperature of the secondary cure can be set freely as long as it does not damage the hair transplant pile.
Of course, the same applies to the primary cure.

The cover material 1, which is the final product, is fitted to the grip of the golf club. In this way, a golf club in which electrostatic grip is applied to the grip is completed. When the cover material 1 is fitted on the grip end of the golf club, the inner diameter of the cover material 1 expands, so that the cover material 1 expands by about 5%. However, since the copolymerized urethane-based adhesive spreads in accordance with the elongation of the coated surface, the pile 5 that has been planted there will not fall off.

According to the golf club in which the piles 5 are flocked in this way, raindrops enter the gaps between the piles 5 and the palms holding the grips are supported by the tips of the piles 5. Therefore, the grip does not slip even in the rain, and the fit is not impaired. Although golf clubs and tennis rackets have been exemplified as the exercise equipment in the above-mentioned embodiments, the present invention is not limited to these and can be applied to various exercise equipment that swings strongly with a hand. Examples include baseball bats (including metal bats) and badminton rackets. Baseball wooden bats rarely have elastic resin applied to their grips, but rubber is better for anti-slip effect, and elastic resin (rubber film, etc.) is not always necessary when replacing bats frequently used like professional players. Even if the pile is adhered and fixed directly to the surface of the wooden grip without using as a base material, an effective anti-slip effect can be obtained.

[0025]

As described above, according to the grip structure for exercise equipment according to the present invention, it is possible to reliably prevent slipping due to raindrops or sweat while maintaining a good feel when gripped.

[Brief description of drawings]

FIG. 1 is a flow chart illustrating a manufacturing process of a resin cover material according to the present invention.

FIG. 2 is a principle diagram illustrating an electric field of normal electrostatic flocking.

FIG. 3 is a principle diagram of an electric field used in an example of the present invention.

[Explanation of symbols]

 1 Cover Material 2 Rotating Brush 4 Adhesive Spray Nozzle 5 Pile 6 Case 7 Vibrator 10 Heater Device 11 Nozzle 12 Water Tank

Claims (3)

[Claims] 1. An exercise tool characterized in that an elastic resin is arranged on a grip of an exercise tool, an adhesive is applied to the surface of the elastic resin, and electrostatic flocking is applied to a grip peripheral surface on which the elastic resin is arranged. Grip structure. 2. The pile used for electrostatic flocking has a fiber cross-sectional diameter of 10 to 20 denier and a fiber length of 0.3 to 0.
The grip structure for exercise equipment according to claim 1, wherein the grip structure has a thickness of 8 mm. 3. The grip structure for an exercise tool according to claim 1, wherein the exercise tool is a grip cover for a golf club.