JP2015029833A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head which enables an adjustment of characteristics such as a face angle.SOLUTION: A fan-shaped concave part 1r is provided on a sole surface of a golf club head 1, and a rail 2 is arranged in the concave part 1r. The rail 2 has a front end side fixed to the golf club head 1 with a bolt 2A. The rail 2 is rotated by loosening the bolt 2A to adjust the position. A height of the rail 2 is larger than a depth of the concave part 1r. When the rail 2 is rotated to a toe side or a heel side, a face becomes a hook face or a slice face.

Description

  The present invention relates to a golf club head, and more particularly to a golf club head capable of easily adjusting a face angle.

  A golf club has a golf club head (hereinafter, simply referred to as a head) attached to the tip of a shaft. A grip is attached to the proximal end of the shaft.

  Patent Document 1 describes a golf club capable of adjusting characteristics such as a lie angle, a slice angle, and a progression, and a method for adjusting the characteristics.

  Patent Document 2 describes a golf club that adjusts various angles of a head by the form of a sole plate of a sole portion and a recessed portion fitted to the sole plate.

  Patent Document 3 describes that a circular plate is installed on the sole, and the circular plate is rotated left and right to correct and adjust the performance of the golf club.

JP 2013-178 A JP 2011-229914 A JP 2003-62131 A

  An object of the present invention is to provide a golf club head in which the face angle can be easily adjusted.

  The golf club head according to the present invention is characterized in that in the golf club head having a sole surface, a rail is provided on the sole surface so that the position thereof can be adjusted.

  In one aspect of the present invention, the rail extends in the front-rear direction of the golf club head, one end in the longitudinal direction of the rail is supported by the golf club head, and the rail has a toe heel around the one end. It can be rotated in the direction. In this case, a recess is provided in the sole surface, the rail is disposed in the recess, and at least a part of the rail protrudes downward from the recess.

  In one aspect of the present invention, a display indicating the position of the rail is provided on the golf club head.

  In one aspect of the present invention, a mechanism for changing the position or direction of the shaft relative to the hosel portion of the golf club head is provided in the golf club head.

  In the golf club head of the present invention, the face angle (face surface) of the golf club head in the sole state (a state where the player places the golf club head on the ground behind the ball) is adjusted by adjusting the position of the rail provided on the sole surface. Can be adjusted.

  In recent years, a system for searching for a golf club that matches a golf club using a computer or a high-speed camera has been developed in order for a golfer to search for a golf club suitable for his / her skill. Such a system is a system in which a search is made by comparing individual commercial clubs based on the head speed, launch angle, and the like.

  According to the present invention, even if it is not based on such a system, a difference in face angle can be easily realized in a golf club comprising the same shaft and head.

It is a perspective view of the bottom face of a head concerning an embodiment. It is the II-II sectional view taken on the line of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is the IV-IV sectional view taken on the line of FIG. It is the perspective view of the bottom face of the head which changed the position of the rail. It is a top view which shows the adjustment state of a face angle. It is a perspective view of the bottom face of a head concerning another embodiment. It is a front view of the head concerning an embodiment. It is a side view of the heel side of a head. It is the XX sectional view taken on the line of FIG. It is a disassembled perspective view of a golf club. It is a perspective view which shows the assembly method of a golf club. It is a perspective view which shows the manufacturing method (spline ring welding method) of a golf club head. It is a perspective view which shows the manufacturing method (spline ring welding method) of a golf club head. It is sectional drawing which shows embodiment. It is a block diagram of the hosel column used for embodiment, (a) A figure is a front perspective view, (b) A figure is a front view, (c) A figure is CC sectional view taken on the line of (b), (d) The figure is a view from arrow D in (a), (e) is a view from arrow E in (a), and (f) is a rear view of the hosel column. It is sectional drawing which shows another embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

  1 to 6 show a golf club head 1 according to an embodiment and a face angle adjusting method thereof.

  The golf club head 1 is of a hollow wood type and includes a face portion 1a, a crown portion 1b, a sole portion 1c, a toe portion 1d, a heel portion 1e, a back portion 1f, and a hosel portion 1g. Have.

  The sole portion 1c is curved so as to be convex downward as a whole. Weight materials 1w are respectively attached to the back side and the heel side of the sole portion 1c.

  In this embodiment, a recess 1r is provided on the heel side of the sole portion 1c, and a rail 2 is installed in the recess 1r. Although not particularly limited, the recess 1r has a fan shape that is recessed by 0.5 to 20 mm from the sole surface and decreases in width toward the face side. The fan has a central angle α of 5 to 90 °. The rear end of the recess 1 r faces the back portion 1 f of the golf club head 1.

  The rail 2 is fastened to the front end portion of the recess 1r by a bolt 2A whose front end is a fastening tool. The bolt 2 </ b> A is screwed into the female screw portion 1 m of the golf club head 1. The configuration for fastening the rail to the head is not limited to this. The rail 2 has an elongated shape extending toward the rear end side of the recess 1r. The length of the rail 2 is not particularly limited, but is 20 to 90% of the maximum length in the front-rear direction in the plan view of the golf club head (FIG. 6A). In addition, as a material of the rail 2, a synthetic resin, a metal, or the like can be used.

  In this embodiment, the lower surface (surface on the sole side) of the rail 2 is convexly curved downward, and at least a part of the rail 2 is below the recess 1r (the golf club head in the sole state). Projects downward (that is, on the ground side). Although the maximum protrusion height H (FIG. 3) from the sole surface of the rail 2 is not particularly limited, it is 0.1 to 20 mm.

  When the bolt 2A is loosened, the rail 2 can be rotated in the α direction in FIG. 1 using the bolt 2A as a rotation axis. Then, by tightening the bolt 2A again, the rail 2 can be fixed in an arbitrary direction in the recess 1r.

  In this embodiment, five scales “+2, +1, 0, −1, −2” indicating the face angle with respect to the position of the rail 2 are provided on the back portion 1f. Scale 0 indicates that the face angle is adjusted to 0 °, scale +2 indicates that the face angle is adjusted 2 ° in the hook direction, and scale-2 indicates that the face angle is adjusted 2 ° in the slice direction. . The number of scales is not limited to five. Characters and symbols other than numbers may be used for the scale.

  The face angle of the golf club head 1 can be adjusted by adjusting the position of the rail 2. The reason for this will be described next with reference to FIG.

  When the rail 2 is in a neutral position (position of scale 0) as shown in FIG. 6A, the rail 2 extends in the front-rear direction perpendicular to the square line. A square line is a toe-heel direction line orthogonal to the front-rear direction (flying ball line direction) passing through the center of the face surface.

  In this embodiment, when the rail 2 is fixed by rotating from the neutral state to the toe side as shown in FIG. 5, the surface of the recess 1r is formed so as to be the hook face of FIG. 6B. ing. That is, when the rail 2 is rotated from the neutral state to the toe side, the back side of the rail 2 protrudes to the ground side from the neutral state. When the golf club head in this state is solesed on a horizontal ground, the back side of the golf club head 1 is lifted more than the state of FIG. When the heel side and the back side of the golf club head 1 are lifted in this manner from the place where the rail 2 is convexly curved downward (on the ground side), the toe side of the face portion 1a is relative to the heel side. As a result, the face portion 1a becomes a hook face.

  On the contrary, when the rail 2 is rotated and fixed to the heel side from the neutral position as shown in FIG. 6C, the surface of the recess 1r is formed so as to be the slice face of FIG. 6C. Yes. That is, when the rail 2 is rotated from the neutral state to the heel side, the back side of the rail 2 is prevented from projecting to the ground side as compared with the neutral state. When the golf club head 1 in this state is solesed on a horizontal ground, the back side of the golf club head 1 is lowered as compared with the case of FIG. Since the rail 2 is convexly curved downward (on the ground side), when the back side of the golf club head 1 is lowered than in the case of FIG. 6A, the toe side of the face portion 1a is compared to the heel side. As a result, the face portion 1a becomes a slice face.

  As described above, the face angle can be variously adjusted by adjusting the position of the rail 2. In this embodiment, the rail 2 is rotatable only within the range of the central angle α of the fan-shaped recess 1r and is not excessively disposed on the toe side or the heel side. Further, the target face angle can be easily adjusted by the scale. FIG. 6 is a schematic view in which the change in the face angle is larger than the actual change.

  FIG. 7 shows a golf club head 1 ′ according to another embodiment. In this embodiment, a step portion 1G is provided in the sole portion 1c, and the sole center portion 1Q protrudes downward as compared to the peripheral portion 1S of the fan-shaped recess 1r. The other configuration of the golf club head 1 ′ is the same as that of the golf club head 1, and the other reference numerals in FIG. 7 indicate the same parts as in FIG. 1. In this embodiment, in addition to the rail 2, the center portion of the sole is grounded, so that the orientation of the head at the time of grounding can be stabilized and addressing can be facilitated.

  In the above embodiment, the bolt 2 </ b> A serving as the rotation center is disposed on the front end side of the rail 2, but may be disposed on the rear end side of the rail 2. As another embodiment, the rail may be formed to slide in the toe-heel direction. Moreover, in the said embodiment, although the rail 2 is installed in the heel side rather than the center of a toe | heel / heel direction, you may install in the center or in the toe side.

  In the above-described embodiment, the recess 1r is provided in the sole portion 1c and the rail 2 is provided in the recess 1r. However, the rail may be disposed in the sole portion without providing the recess.

  Furthermore, the present invention may be configured as described in Patent Document 1 so that characteristics such as a lie angle, a loft angle, and a progression can be adjusted by adjusting the mounting position and angle of the shaft with respect to the hosel. This configuration will be described next with reference to FIGS.

  16 shows the diameter / length ratio larger than that of the hosel column of FIGS. 8 to 15 in order to clearly show the inclination of the inner hole of the hosel column.

  As shown in FIG. 8, the golf club is configured by attaching the shaft 4 to the hosel column 3 of the golf club head 1 via the shaft case 5, the spline ring 8 and the bolt 7.

  As shown in FIG. 10, a hosel portion 1g is provided on the face portion 1a side and the heel portion 1e side of the crown portion 1b. The hosel column 3 is connected to the hosel portion 1g and extends to the sole portion 1c. Reference numeral 1 h in FIG. 1 indicates a sole side opening of the hosel column 3. The hosel column 3 has a cylindrical pipe shape, and a partition plate portion 6 perpendicular to the axial direction is provided in the middle of the inner hole in the longitudinal direction (axial direction). A spline ring 8 is disposed on the upper side of the partition plate portion 6. A shaft case 5 is inserted above the partition plate portion 6. Bolts 7 are inserted from below into the bolt insertion holes (openings) 6 a provided in the partition plate portion 6 and screwed into the female screw holes 5 m of the shaft case 5.

  As shown in FIGS. 10 to 13 and 5, the shaft case 5 is a cylindrical member having an outer diameter that is very slightly smaller than the inner diameter of the hosel column 3, and the shaft 4 is inserted from the upper end side toward the lower end side. A hole 5h is provided. The shaft 4 is inserted into the shaft insertion hole 5h and fixed to the shaft case 5 with an adhesive. The depth of the shaft insertion hole 5h is preferably 10 mm or more, for example, 10 to 60 mm, particularly 20 to 50 mm.

  An outwardly flanged flange portion 5 b is provided at the upper end (rear end) of the shaft case 5. The flange portion 5b has an annular plate shape, but may have a tapered shape with a smaller diameter toward the upper side, and is not limited thereto.

  A projecting shaft portion 5 a is projected from the lower portion (tip portion) of the shaft case 5. The axis of the convex shaft portion 5 a is the same as the axis of the outer peripheral surface of the shaft case 5. Splines (protrusions in a direction parallel to the axial center line) are provided on the outer peripheral surface of the convex shaft portion 5a. A groove 5e is provided around the base portion of the convex shaft portion 5a.

  A female screw hole 5m is provided so as to be recessed in the axial direction from the tip surface of the convex shaft portion 5a.

  As shown in FIG. 11, the spline ring 8 is a ring having a cylindrical outer peripheral shape. Splines are provided on the inner peripheral surface of the inner hole penetrating the spline ring 8 in the axial direction. The spline of the convex shaft portion 5 a of the shaft case 5 is engaged with the spline of the spline ring 8. In this embodiment, eight splines are provided so that the circumferential phase of the shaft case 5 can be changed by 45 °. However, there may be four splines, and the circumferential phase of the shaft case 5 may be changed by 90 °. Also, the number of splines may be 12, 16, 20, or the like.

  The spline ring 8 is inserted into the hosel column 3 and is welded to the hosel column 3. This welding method will be described later.

  In order to assemble the golf club, the spline ring 8 is previously placed on the bottom of the hosel column 3 and welded. In addition, as shown in FIG. 12, the shaft case 5 is fixed to the tip of the shaft 4 using an adhesive to form a shaft case / shaft coupled body. Preferably, this adhesive is applied to the outer peripheral surface of the tip portion of the shaft 4 and the shaft 4 is inserted to the innermost portion of the shaft insertion hole 5 h of the shaft case 5. As the adhesive, an epoxy adhesive or the like is suitable.

  As shown in FIG. 10, the female screw hole 5 m does not penetrate the shaft case 5 in this embodiment. In this case, when the shaft 4 is inserted into the shaft insertion hole 5h of the shaft case 5, the air screw hole 5m and the shaft insertion hole 5h communicate with each other so that air flows out through the female screw hole 5m. Small holes may be provided.

  The shaft case 5 of this shaft case / shaft connected body is inserted into the hosel column 3, the convex shaft portion 5a of the shaft case 5 is inserted into the inner hole of the spline ring 8, and the spline of the convex shaft portion 5a and the spline of the spline ring 8 are connected. Engage. Next, the bolt 7 is screwed into the female screw hole 5m through the bolt insertion hole 6a.

  As a result, the shaft case 5 is fixed to the head 1 as shown in FIGS. Since the shaft case 5 and the shaft 4 are firmly bonded with an adhesive, a golf club in which the shaft 4 and the head 1 are integrated is completed. Since the spline of the shaft case 5 and the spline of the spline ring 8 are engaged, the circumferential phase of the shaft 4 and the shaft case 5 is accurately determined. Further, the fixed rigidity in the torque direction of the shaft 4 and the shaft case 5 is high.

  The spline ring 8 is an annular member having a short axial length that is disposed only in the inner part of the hosel column 3 and has a small weight.

  In this golf club, the shaft can be easily replaced. In order to replace the shaft of the golf club, a shaft case of the same type as the shaft case 5 is fixed to the new shaft to be replaced in advance with an adhesive.

  The bolt 7 of the existing golf club is removed, and the old shaft 4 is removed from the head 1 together with the old shaft case 5. Next, a new shaft with a shaft case (shaft case / shaft coupled body) is inserted into the head 1 and fixed with bolts 7.

  In this way, the shaft can be attached and replaced very easily and quickly. In the above embodiment, the shaft can be replaced in a few minutes by attaching the shaft case 5 to the new shaft in advance with an adhesive. Accordingly, it is possible to realize a usage system in which shafts of various specifications with a shaft case are prepared, and different shafts are sequentially attached to the same head 1 for trial hitting.

In this embodiment, as shown in FIGS. 15 and 16, the axis of the shaft insertion hole 5h is inclined with respect to the axis of the outer peripheral surface of the shaft case 5, that is, the axis of the hosel column 3, so that the inclination of the shaft 4 can be changed. Yes. Specifically, as shown in FIG. 16 (c), the which obliquely intersects at an angle θ to the axial line a ₂ in the axial line a ₁ of the outer circumferential surface of the shaft case 5 and shaft insertion hole 5h. In a normal case, the angle θ is preferably 0.1 to 5 °, particularly 0.25 to 3 °.

  Note that the axial lines do not have to intersect each other and may have a “twisted” relationship. In other words, the two axes may not cross each other and one axis passes through the vicinity of the other axis.

As shown in FIG. 16 (a), on the outer peripheral surface of the flange portion 5b of the shaft case 5, the plane including the axis lines a ₁ and a ₂ intersects with the outer peripheral surface of the flange portion 5b, and A mark “N” indicating a neutral position is provided at a position opposite to the axis center line a ₂ across the axis line a ₁ . Further, a mark “NEUTRAL” made of a word meaning a neutral position is attached below the mark “N” (on the convex shaft portion 5a side). “R” and “RIGHT” are attached to the left of 90 ° from “N” and “NEUTRAL”, and “L” and “LEFT” are attached to the right of 90 °. On the opposite side of the marks “N” and “NEUTRAL”, “U” and “UPRIGHT” are attached. Each of the NEUTRAL, RIGHT, LEFT, and UPRIGHT marks extends in a direction parallel to the axis.

  8 to 10, the mark N and NEUTRAL of the shaft case 5 face the toe side. This state is the standard state of this golf club.

  On the other hand, in FIG. 15, the shaft case is rotated 90 ° in the clockwise direction in the plan view from the state of FIGS. 8 to 10, and the marks L and LEFT face the toe side. That is, the surface of FIG. 16 (f) faces the toe side. For this reason, in FIG. 15, the axis of the shaft 4 is inclined to the face side with respect to the axis of the hosel column 3. The tilt direction of the shaft 4 can be changed by turning the shaft case 5 by 90 ° or 180 ° from the state of FIG. That is, the shaft 4 can be tilted toward the toe side or tilted toward the back side.

  Thus, the lie angle and the loft angle can be changed by changing the direction of inclination of the shaft 4.

  The lie angle will be described. When the mark N and NEUTRAL are directed to the toe side, the shaft 4 is tilted most toward the heel side, and the flat lie is the smallest. When the mark U and UPRIGHT are directed toward the toe side, that is, when the surface of FIG.

  In terms of the loft angle, the state where the plane (N, NEUTRAL) in FIG. 16B is directed to the toe side is the standard state. When the shaft 4 is tilted to the most face side by directing the marks L and LEFT to the toe side, the loft angle becomes the largest. On the other hand, when the shaft 4 is tilted most rearward with the marks R and RIGHT facing the toe side, the loft angle becomes the smallest.

  In this way, by using the shaft case 5 of FIG. 16, the inclination direction of the shaft 4 with respect to the head 1 can be changed, and the lie angle and loft angle can be changed. In the above description, the orientation of the shaft case 5 is changed every 90 °, but may be changed every 45 °.

  A shaft case 5 </ b> A in FIG. 17 is obtained by decentering the shaft insertion hole 5 h from the axial center position of the shaft case 5. The shaft center of the shaft insertion hole 5h is parallel to the shaft center of the outer peripheral surface of the shaft case 5 and slightly separated (for example, 0.5 to 4 mm) therefrom.

  By using this shaft case 5A, the progression of the shaft can be adjusted. For example, as shown in FIG. 17, the shaft 4 can be brought closer to the face side by an eccentric distance than in the case of FIG.

  From the state shown in FIG. 17, the bolt 7 is removed and the shaft case 5A is once extracted from the hosel column 3 and rotated 90 °, 180 ° or 270 ° to translate the position of the shaft 4 to the heel side, back side or toe side. Can be changed. By changing the position of the shaft 4 in this way, the distance from the shaft axis to the center of gravity of the head is changed. Further, the progression is changed by setting the position of the shaft 4 to the face side or the back side.

  The spline ring, shaft case, hosel column, and bolt are preferably made of metal, and particularly preferably made of aluminum, titanium, or an alloy thereof. As the shaft case, an aluminum alloy having an alumite treatment and a high surface hardness so as not to be scratched can be used, but is not limited thereto. As the hosel column, a column made of pure titanium and manufactured by cutting can be used, but is not limited thereto. In an example of the present invention, the inner diameter of the upper end of the hosel column 3 is about 10.5 mm, the inner diameter of the lower end is about 8.5 mm, and the diameter of the screw rod portion of the bolt 7 is about 4 to 5 mm. It is not limited.

  The material of the head is not particularly limited, but in the case of a wood type golf club head, for example, a titanium alloy, an aluminum alloy, stainless steel or the like can be used. The titanium alloy used for the face surface is preferably a titanium alloy having a low specific gravity, and Ti-6Al-1Fe or Ti-6Al-2Fe, Ti-6Al-3Fe titanium alloys are preferred. The specific gravity of these titanium alloys is about 4.4. Examples of titanium alloys having a specific gravity of 4.4 include the following.

Ti-8Al-1V-1Mo (specific gravity 4.37)
Ti-7Al-2V (specific gravity 4.35)
Ti-7.5Al-2V (specific gravity 4.35)
Ti-8Al-1V (specific gravity 4.34)
Ti-8Al-2V (specific gravity 4.35)
Ti-8Al-1V-1Mo-0.15C (specific gravity 4.37)
Ti-6Al-1Fe (specific gravity 4.38)

  In addition, as a grip attached to the shaft 4, a grip having a non-circular cross section may be used. For example, the bottom surface of the grip outer peripheral surface that faces the ground in the address state may have a shape that bulges more than other surfaces. In such a case, when the direction of the shaft cases 5 and 5A is changed, the grip bulging portion may not be on the ground side. Therefore, in the present invention, it is preferable to use a grip having a perfectly circular cross section.

1, 1 'head 1a face part 1d toe part 1e heel part 1g hosel part 1r recess 1Q sole center part 2 rail 2A bolt 3 hosel column 4 shaft 5, 5A shaft case 5a convex shaft part 5h shaft insertion hole 5m female screw hole 6 partition Plate part 6a Bolt insertion hole 7 Bolt 8 Spline ring 10 Head body 11 Hole

Claims (7)

  A golf club head having a sole surface, wherein a rail is provided on the sole surface so that position adjustment is possible. In claim 1, the rail extends in the front-rear direction of the golf club head, and one end in the longitudinal direction of the rail is supported by the golf club head,
The golf club head, wherein the rail is rotatable in a toe-heel direction about the one end side.   3. The golf club head according to claim 2, wherein the front end side of the rail is supported by the golf club head.   4. The method according to claim 2, wherein a recess is provided in the sole surface, the rail is disposed in the recess, and at least a part of the rail protrudes downward from the recess. Golf club head.   5. The golf club head according to claim 1, further comprising a display showing a position of the rail.   6. The golf club head according to claim 1, wherein the lower surface of the rail is convexly curved downward.   7. The golf club head according to claim 1, further comprising a mechanism for changing the position or direction of the shaft relative to the hosel portion of the golf club head.

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