JP5048608B2 - Competition stick - Google Patents

Description

  The present invention relates to a competition stick used in competitions such as ice hockey, field hockey, or cricket.

  The competition stick used in the competition as described above includes a shaft that is gripped and held, and a blade that strikes a ball or a pack that is integrally or detachably attached to the tip of the shaft. In general, it is known that such a competition stick shaft is reduced in weight by using a composite material such as fiber reinforced plastic as disclosed in Patent Document 1, for example.

Further, as disclosed in Patent Document 1 described above, the shaft is generally made rectangular in cross-sectional shape. This is to make it easier to suppress the rotational torque applied to the shaft when hitting a ball or pack with the blade portion (hereinafter referred to as a hit ball). In other words, if the shaft has a circular or elliptical cross section, even if the shaft is strongly gripped and held, it will be easy to rotate inside the palm when the rotational torque is applied, and as a result, it will be strong at the blade part. This is because when the ball is hit, the shaft turns against the rotational torque, and an accurate chute (direction) cannot be hit, or a sufficient force cannot be transmitted to the ball or the puck.
Japanese Patent Laid-Open No. 6-198810

  As disclosed in the above-mentioned Patent Document 1, by making the cross-sectional shape of the shaft rectangular, the rotational torque acting on the shaft when hitting with a blade portion is suppressed compared to a circular shape or an elliptical shape. However, in order to improve the directionality of the hit ball and to hit the ball at a higher speed (hit a shot), it is desirable that the rotational force acting on the shaft is further suppressed.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a game stick capable of suppressing the rotation of the shaft portion when hit with a blade.

In order to achieve the above-described object, the competition stick according to the present invention has a shaft with a blade attached to the tip, and the shaft has a polygonal cross section, and a reinforcing fiber is impregnated with a resin. The prepreg sheet is formed into a hollow shape by winding a predetermined number of times , and at least two or more bulging portions extending in the axial length direction and bulging outward are formed on the surface portion of the shaft. The bulging portion is formed on the top of the polygon, and when the synthetic resin of the prepreg sheet wound a predetermined number of times is thermoset, the prepreg sheet wound a predetermined number of times on the top A synthetic resin is allowed to flow into a resin-rich state, and is integrally bulged with the shaft .

  In the competition stick configured as described above, at least two or more bulging portions that extend in the axial direction and bulge outward are formed on the surface portion of the shaft, so that the shaft is gripped and held. When this occurs, the bulging part improves the degree of engagement of the palm and the abdomen of the finger with respect to the rotation direction, thereby effectively suppressing the rotation of the shaft and hitting the ball with high speed and good directionality. It becomes possible.

  According to the present invention, at the time of hitting with a blade, rotation of the shaft portion is effectively suppressed, and a playing stick capable of hitting a ball with high speed and good directionality can be obtained.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a competition stick according to the present invention will be specifically described with reference to the accompanying drawings.
FIG. 1 is a diagram showing an overall configuration of a competition stick.

  The competition stick 1 according to the present embodiment includes a shaft 2 and a blade 5 that is attached to the tip of the shaft 2 and that hits a ball, a pack, or the like. The shaft 2 is configured by winding a so-called prepreg sheet formed by impregnating a reinforcing fiber (for example, carbon fiber, glass fiber, aramid fiber) with a matrix resin such as an epoxy resin, a polyester resin, or a phenol resin. Has been. In this case, the shaft 2 of the present embodiment is configured to be hollow with a rectangular cross section. The shaft may be filled with foam or the like so as to absorb vibration.

  A grip tape 7 is wound around the base end portion of the shaft 2. Normally, the shaft 2 is cut according to the height of the user, the position of each person in the competition, and the like, and the grip tape 7 is wound so that the cut portion is concealed. The grip tape 7 may be wound directly on the outer peripheral surface of the shaft 2 or may be wound in a state where another member is attached to the shaft 2 in consideration of gripping properties.

  The shape and material of the blade 5 are selected depending on the application, and the blade 5 is attached to the tip of the shaft 2. In this case, the blade 5 may be integrated with the shaft 2 or may be configured to be replaceable.

  2 to 5 are diagrams showing the configuration of the shaft shown in FIG. 1, FIG. 2 is a perspective view showing the cross-sectional shape of the shaft, FIG. 3 is a cross-sectional view, and FIG. 4 is an outline of the manufacturing method of the shaft. FIG. 5 is a cross-sectional view showing an outline of a method for manufacturing a shaft, and shows a state in which a bulging portion is formed.

  As shown in FIG. 2, the shaft 2 includes at least two bulging portions 2A that extend in the axial length direction and bulge outward. As shown in FIG. 3, the shaft 2 of the present embodiment has a rectangular cross section and is formed in a hollow shape, and the bulging portion 2 </ b> A is formed at a corner portion that becomes a rectangular top portion. Note that the bulging portion 2A is only required to be bulged outward with respect to the surface portion 2a of the shaft 2, and the surface thereof is formed in an arc shape so as to improve the grip comfort. It is preferable that

  Moreover, about the height H with respect to the surface part 2a of the bulging part 2A, if it is too high, it will be easy to produce a sense of incongruity when it is gripped, and if it is too low, the effect of suppressing rotation will not be sufficiently exerted. It is set in the range of -1.2 mm, preferably 0.4-0.8 mm. Furthermore, if the cross section is rectangular (rectangular) like the shaft of this embodiment, the length L of the bulging portion 2A described above is 6 to 7 mm, and the length L1 of the short side is 7 It is preferable that the length L2 of ˜8 mm and the long side is set to 10 to 16 mm. By setting such a size, it is possible to improve the holding feeling when grasping, and it is easy for the abdomen and palm of the finger to hang on the bulging portion 2A, thereby suppressing the rotation of the shaft. It becomes possible.

  The shaft 2 configured as described above is, for example, a prepreg sheet (also referred to as a main body prepreg sheet) wound around a cored bar (mandrel) M having a rectangular cross section from the front to the original side. 20 can be configured. In this case, the main body prepreg sheet 20 is configured by impregnating a synthetic resin into a woven fabric-like reinforcing fiber, and is wound around the core metal M a predetermined number of times.

  In addition, about the prepreg sheet | seat, the reinforced fiber which comprises it may be a thing (one direction prepreg sheet | seat) with which the axial length direction, the circumferential direction, or the inclination direction was aligned. In this case, it is desirable to combine the unidirectional prepreg sheets so that the alignment directions of the reinforcing fibers intersect so that the shaft does not break or bend. Further, a reinforcing prepreg sheet may be wound so as to be partially reinforced in the axial direction of the shaft. And about such a prepreg sheet for reinforcement, you may affix on the said main body prepreg sheet 20. FIG.

  The main body prepreg sheet 20 configured as described above is applied to the cored bar M along its axial length, and is ironed or the like. And it rolls around the metal core M while rolling, and at the stage where it has finally finished winding, a fixing tape (not shown) is wound to stabilize the prepreg sheet.

  Then, as described above, the cored bar M on which the main body prepreg sheet 20 is wound and taped has a predetermined shape so that the top (corner) 21 of the main body prepreg sheet 20 is exposed as shown in FIG. It is heated while being pressed by the pressing dies 30,31. At this time, the pressing dies 30 and 31 are pressed against each of the rectangular surface portions in a direction orthogonal to each other with a substantially equal pressure so as to go to the center (see arrows in FIG. 5).

  As a result, when the synthetic resin of the main body prepreg sheet 20 is thermoset by the above-described heating process, as shown in FIG. 5, the resin flows into each of the top portions 21 and swells almost uniformly toward the outside. The bulging portion 2A whose surface is arcuate is finally formed integrally with the shaft. Then, the shaft 2 as shown in FIG. 1 is formed through a tape peeling process and a decentering process. In addition, you may improve an external appearance by giving the surface of the shaft 2 formed, for example, attaching a tape etc.

  As shown in FIGS. 6 and 7, in the competition stick 1 having the above-described configuration, when the shaft 2 is struck and held and hit, a finger is applied to each bulging portion 2A portion even if the shaft 2 tries to rotate. The abdomen and palm are easily caught, and the rotation of the shaft 2 is effectively suppressed. As a result, even if the ball or puck is hit strongly, the shaft 2 does not shake, so that it is possible to hit a hit ball having a high speed and good directionality. In particular, in the above-described embodiment, since the top of the rectangular section is bulged, the gripping and holding properties can be improved, and the rotation of the shaft 2 can be more effectively suppressed.

  Further, in the above-described embodiment, since the bulging portion 2A is integrally formed with the shaft 2 by the prepreg sheet 20, the adhesiveness with the shaft main body is good, manufacturing is easy, and cost can be reduced. It becomes.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.

  The bulging portion 2A described above only has to protrude outward from the surface portion of the shaft 2, and for example, as shown in FIG. 8, the entire portion is not an arc shape but partially includes a linear portion 2b. May be. Thus, the shape of the bulging portion 2A can be appropriately modified according to the shape of the pressing mold used during the heating process. Further, the bulging portion may be configured by attaching a separate body after the shaft is formed by the above-described procedure. In this case, as a separate example that becomes the bulging part, it is possible to configure by sticking a thick tape on the corner of the pipe, or sticking an L-shaped resin cover in the axial direction of the corner, etc. It is.

  Furthermore, the cross-sectional shape of the shaft 2 may be a pentagonal or more polygonal shape, may be an elliptical cross-section as shown in FIGS. 9 and 10, or may be a circular shape. By adopting such a shape, it is possible to improve the grip comfort when gripping and holding. Furthermore, as for the bulging portions 2A provided on the surface portion, at least two bulging portions may be provided on the surface portion of the shaft 2 so that the rotation of the shaft can be effectively prevented and the grip comfort is not lowered. Further, the bulging portion may be provided in a portion other than the top of the polygon, or may be provided only in a region portion that is mainly gripped and held in the longitudinal direction of the shaft.

  In the above-described embodiment, a prepreg sheet is used as a material constituting the shaft. However, the constituent material and the method for forming the shaft can be appropriately modified. For example, the shaft may have the same shape as the present application by a pultrusion method.

  Furthermore, in the above-described embodiment, the prepreg sheet constituting the shaft 2 can be used by appropriately modifying, for example, the alignment direction of the reinforcing fibers, the impregnation amount of the synthetic resin, the thickness, the number of windings, and the like. .

The figure which shows the whole structure of the competition stick which concerns on this invention. The perspective view which shows the cross-sectional shape of the shaft shown in FIG. Sectional drawing of a shaft. Sectional drawing which shows the outline of the manufacturing method of a shaft. It is sectional drawing which shows the outline of the manufacturing method of a shaft, and is a figure which shows the state in which the bulging part was formed. The figure which looked at the state which grasped and held the shaft from the grip end side. The perspective view which shows the state which held and hold | maintained the shaft. Sectional drawing which shows the 1st modification of a shaft. Sectional drawing which shows the 2nd modification of a shaft. The figure which looked at the state which grasped and held the shaft in the composition shown in Drawing 9 from the grip end side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Competition stick 2 Shaft 2A Bulging part 5 Blade 20 Pre-preg sheet 21 Top part 30,31 Press type

Claims (1)

A competition stick having a shaft with a blade attached to the tip,
The shaft is formed in a hollow shape by winding a prepreg sheet having a polygonal cross section and impregnating a reinforcing fiber with a resin a predetermined number of times .
The surface portion of the shaft is formed with at least two bulging portions extending in the axial direction and bulging outward.
The bulging portion is provided at the top of the polygon, and when the synthetic resin of the prepreg sheet that is wound the predetermined number of times is thermoset, the prepreg sheet of the synthetic resin that is wound the predetermined number of times on the top A competition stick characterized by being formed into a resin-rich state by flowing in and integrally bulging with a shaft .

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