JP5670568B2 - Golf club - Google Patents

Description

  The present invention relates to a golf club in which a shaft is attached to a hosel hole of a hosel portion via an adapter.

  In order to meet the golfer's ability and preference, it is necessary to combine the shaft and head in accordance with each golfer. Therefore, conventionally, for example, a golf club in which the shaft and the head can be easily attached and detached as proposed in Patent Document 1 (Japanese Patent Laid-Open No. 2002-153574) and Patent Document 2 (Japanese Patent Laid-Open No. 2005-270402). Is known.

JP 2002-153574 A JP 2005-270402 A

  However, in the configuration of Patent Document 1, the insert can be rotated to adjust the loft angle and the like, and the locking member is pressed against a plurality of depressions provided on the side surface of the insert to stop the rotation. For this reason, since a shearing load is repeatedly applied to the locking member in particular, there is a fear that the club head is not sufficiently fixed around the shaft axis.

  Moreover, in the structure of patent document 2, since the shaft tip is protruded from the hosel hole to the sole side together with the spacer, the shaft and the spacer are heated to remove the shaft from the club head, so the club head can be reused but the shaft is reused. Can not. The spacer and the shaft insertion hole are not fixed by adhesion or the like, and are fixed by friction between the protrusion near the crown and the receiving means and the spacer near the sole, or the shaft insertion hole and the spacer. For this reason, there was a problem that the club head shaft shaft was not sufficiently fixed with respect to the impact load at the time of hitting the ball.

  A golf club of the present invention for solving the above-described problems has a shaft, a shaft insertion portion provided with a shaft insertion hole for fixing the shaft at one end, and a central axis of the shaft insertion portion at the other end. An adapter having a fixing portion provided integrally with being shifted and having a recess provided in at least a part of the peripheral wall surface, a hosel hole into which the adapter is inserted, and a position corresponding to the recess of the fixing portion from the hosel outer wall A head having a hosel portion having a through hole extending to the hosel hole, and a shaft slip-off preventing means that presses the concave portion through the through hole are provided.

  According to the golf club of the present invention, the fixing portion provided integrally with a shaft different from the shaft insertion portion of the adapter is inserted into the lower portion of the hosel hole to suppress the rotation of the club head around the shaft. Further, since the escape preventing means presses the concave portion provided on the wall surface of the fixed portion through the through hole, the shaft does not come out of the hosel hole. Since the impact load applied at the time of hitting the ball is smaller in the removal direction than in the rotation direction around the shaft, the removal prevention means can be made smaller. Moreover, since the shaft and the adapter are fixed and attached to another club head, both the head and the shaft can be reused.

  Therefore, you can hit a golf club with an arbitrary shaft and club head and check the performance of the club. If you do not fit the golfer, you can change the club head or shaft to another and hit it. The accuracy of fitting can be increased.

It is a schematic explanatory drawing of the golf club head of this invention. It is a schematic explanatory drawing of an adapter. It is a schematic explanatory drawing of a hosel part. It is an example of the adapter of this invention. It is an example of the hosel part of this invention. It is a top view of the omission prevention means of the modification of this Embodiment. It is a side view of the omission prevention means of the modification of this Embodiment.

An embodiment of the present invention will be described with reference to FIGS.
The golf club of this embodiment includes a shaft made of a tubular body in which fiber reinforced resin prepregs are laminated, a metallic tubular body, or a tubular body formed by combining them, and a club head is attached to the tip of the shaft. A grip made mainly of natural rubber or synthetic rubber is attached to the other end.

  The club head may be an iron type or a wood type, and is formed by casting or forging with an iron-based alloy such as stainless steel, or a metal material such as titanium or titanium alloy. The club head may be made of a single material or may be formed by joining a plurality of materials, but a hosel hole for receiving an adapter is provided in the hosel part.

  For example, in a wood head having a hollow portion formed of an outer shell and provided with an inner hosel such as a metal pipe, a metal block or the like is welded to the lower end of the inner hosel, or a hole is drilled in a rod body. To provide a hole along the adapter shape. Further, the hosel is further provided with a through hole that connects the outer wall of the hosel to the lower stage of the hosel hole.

  The adapter can be made of a metal material such as stainless steel, titanium alloy or aluminum alloy, engineering plastic, fiber reinforced resin, or the like, but it is more preferable to use a metal material having excellent fatigue characteristics. It is desirable that the shaft insertion portion and the fixing portion are integrally formed, but a protrusion is provided at an end portion where the shaft insertion portion does not open, and a hole corresponding to the protrusion is provided in a separate fixing portion so that the shaft insertion portion You may couple | bond a fixing | fixed part integrally. Further, at least one concave portion is provided on the outer wall of the fixed portion so that the shaft does not come out of the hosel hole.

  FIG. 1 is a schematic explanatory view of a club head 1 of the present invention, and FIG. 2 is a schematic explanatory view of an adapter 3 attached to a hosel portion 2 of the club head 1.

  As shown in FIG. 3, in the golf club of the present invention, the adapter 3 fixedly integrated with the tip of the shaft 4 is inserted into the hosel hole 5. The lower stage 6 of the hosel hole 5 fits the fixing part 7 of the adapter 3, and the upper stage 8 of the hosel hole 5 fits the shaft insertion part 9 of the adapter 3. In a state where the adapter 3 is inserted into the hosel hole 5, the shaft 4 and the adapter 3, and the shaft insertion portion 9 and the central axis of the hosel hole 5 coincide with each other. Further, the lower stage 6 of the hosel hole 5 and the axis of the fixing part 7 of the adapter 3 also coincide with each other, but the shaft insertion part 9 and the axis of the fixing part 7 do not coincide with each other.

  After the adapter 3 is inserted into the hosel hole 5, the removal preventing means 11 presses the surface of the fixing portion 7 on which the concave portion 12 is formed through the through hole 10 that reaches the lower stage 6 of the hosel hole 5 from the hosel outer wall. The slip prevention means 11 stays in the through hole 10 by a screw or the like provided in the through hole 10, so that the shaft 4 does not come out of the hosel hole 5.

  FIG. 4 is an example of the adapter 3 according to the present invention. The shaft insertion portion 9 having the shaft insertion hole 13 and the fixed portion 7 having an axis Z2 different from the axis Z1 of the shaft insertion portion 9 and provided integrally with the shaft insertion portion 9 are configured. On the side wall of the fixed portion 7, a concave portion 12 that becomes deeper as it approaches the shaft insertion portion 9 side is provided to prevent it from coming off.

  The axis Z1 of the shaft insertion portion 9 and the axis Z2 of the fixing portion 7 are desirably provided in parallel to facilitate the processing of the hosel hole 5.

  In this embodiment, the shaft insertion portion 9 has a cylindrical shape with a diameter D1 of 10.6 to 11.0 mm and a length L1 of 33 mm, and the fixed portion has a diameter D2 of 7.0 to 7.5 mm and a length L2 of 9. It is formed in a cylindrical shape of 0 to 14.0 mm, and both cylinders are provided such that one point of the outer periphery thereof is in contact with each other, and the axis Z1 of the shaft insertion portion 9 and the axis Z2 of the fixing portion 7 are shifted by 1.7 mm in parallel. Yes. The fixing portion 7 on the opposite side of the contact point is provided with a recess 12 that gradually becomes deeper toward the shaft insertion portion 9 side.

  FIG. 5 is an example of the hosel portion 2 in the club head of the present invention. The above-described adapter 3 is inserted with the shaft insertion portion 9 and the fixing portion 7 to form a hosel hole 5 composed of an upper stage 8 and a lower stage 6 that are fitted into the shaft insertion part 9 and the fixing part 7 respectively. A through hole 10 extending from the lower stage 6 of the hosel hole 5 to the outer wall of the hosel is provided. Through this through hole 10, the prevention means 11 presses the recess 12 provided on the side wall of the fixing portion 7 of the adapter 3, and the adapter 3 Do not remove from the hole 5. The removal preventing means 11 is detachable, and the adapter 3 can be removed from the hosel hole 5 by removing from the through hole 10.

  In this embodiment, the upper stage 8 of the hosel hole 5 is a hole having a diameter D3 of 11.0 to 11.4 mm and a depth L3 of 10.5 to 15.5 mm, and the shaft insertion part 9 excluding the taper part can be inserted. Provided. The lower stage 6 of the hosel hole 5 is a hole having a diameter D4 of 7.5 to 8.0 mm and a depth L4 of 9.0 to 14.0 mm so that the adapter 3 can be inserted in a removable state.

  Further, the shaft assembling allowance L1 'was 25.0 to 27.0 mm. The hosel length L5 was 48.0 mm to 63.0 mm. Here, the hosel length L5 indicates the distance from the point where the imaginary line on the shaft axis intersects the heel to the upper end of the hosel.

  In this embodiment, a screw is provided in a part of the through hole 10, and a bolt is used as the removal preventing means 11. The bolt was a stainless steel screw so that it could withstand repeated shear loads. In addition, you may press the recessed part 12 via an elastic body in order to improve the durability of the recessed part 12 of the adapter 3, and the improvement of durability of a prevention means, and drop-off.

  When the golf club according to the present invention is used as a golf club for custom fitting, the center of gravity of the club head 1 and the center of gravity of the product head corresponding to the club head 1 are increased in order to increase the accuracy as a fitting tool. Are desired to be the same. However, when the club head 1 and the shaft 4 are assembled via the adapter 3 as in the golf club according to the present invention, the mass on the heel side is increased by the weight of the adapter 3, so that the center of gravity of the heel is larger than that of the product head. Thus, the center of gravity is displaced between the product head and the club head 1.

  In order to improve such a problem, in this embodiment, the weight of the adapter 3 is reduced by adopting a titanium material or an aluminum alloy, and the weight of the hosel portion of the club head 1 is reduced. The position of the center of gravity of the club head 1 corresponding to the product head is substantially the same. Specifically, the hosel of the product head corresponding to the club head 1 is cut by a predetermined length, and the hosel length after this cutting is set as the hosel length L5 of the club head 1. Then, the hosel length L5 and the length of the shaft assembling allowance L1 'are adjusted as appropriate so that the weight of the cut hosel portion is equal to the weight of the adapter 3. At this time, the machining allowance (mass) of the shaft hole of the club head 1 is the same as the machining allowance in the product head.

  The hosel length L5 (48.0 mm to 63.0 mm) and the shaft assembling allowance L1 ′ (25.0 mm to 27.0 mm) of the present embodiment described above are the product heads having a hosel length of 55.0 mm to 70.0 mm. Therefore, it is possible to further improve the fitting accuracy when the golf club according to the present invention is used as a custom fitting club.

  It is possible to bring the center of gravity of the club head 1 close to that of the product head even if it is other than the hosel length L5 and the shaft assembly allowance L1 ′ described above. However, for the shaft assembly allowance L1 ′, the adapter 3 and the shaft 4 The hosel length L5 is more preferably in the above range from the viewpoint of ensuring the strength of the adapter 3 and the club head 1.

  A method of attaching the club head 1 and the shaft 4 of the golf club of the present invention will be described. As shown in FIG. 3, the tip of the shaft 4 is fixed to the shaft insertion hole 13 of the adapter 3 by adhesion or the like. The ball 3 can be hit as a normal golf club by inserting the adapter 3 with the shaft 4 into the hosel hole 5 and attaching the slip prevention means 11 through the through hole 10 provided in the hosel.

  As described above, according to the golf club of the present invention, the club head 1 and the shaft 4 can be easily attached and detached, and both the club head and the shaft can be reused. The rotation around the shaft axis of 1 can be stopped.

  In addition, you can check the performance by hitting the ball with a golf club assembled with any club head and shaft that the golfer wants to use, and if it is not good, you can check the performance by replacing it with another club head or shaft Therefore, a highly accurate custom fitting system is possible.

  As shown in FIG. 3, at least a part of the bottom surface of the recess 12 is inclined so as to become deeper as it approaches the shaft insertion portion 9 side. For this reason, the slip-off prevention member 11 presses the inclined surface of the recess 12 to press the fixing portion 7 against the wall surface of the hosel hole 5 and away from the shaft insertion portion 9 (from the upper stage 8 to the lower stage 6 of the hosel hole 5). A force can be applied to the fixing portion 7 in the direction of heading. Accordingly, the adapter 3 can be fixed to the hosel portion 2 of the club head 1 and the adapter 3 can be pushed into the hosel portion 2. As a result, the surface of the adapter 3 positioned around the shaft insertion portion 9 can be pressed against the end surface positioned around the opening of the hosel portion 2, and the adapter 3 is attached to the hosel portion 2 with an inclination. Can be effectively suppressed, and the generation of gaps can also be effectively suppressed.

  Further, as shown in FIG. 2 (d), the fixing portion 7 is eccentric with respect to the central axis of the shaft insertion portion 9 so that the outer periphery of the shaft insertion portion 9 and the outer periphery of the fixing portion 7 partially overlap each other. In the position. As shown in FIG. 3, the recess 12 is formed on the side (outside: eccentric side) opposite to the side where the outer periphery of the shaft insertion portion 9 and the outer periphery of the fixing portion 7 are in contact with each other (inner side: the central axis side of the shaft insertion portion 9) It is provided on the side wall of the fixed portion 7. Here, by decentering the shaft center of the fixed portion 7 with respect to the shaft center of the shaft insertion portion 9, a space can be secured between the recess 12 and the outer wall of the hosel. Means 11 can be provided. In addition, by securing a large space, it is possible to increase the dimension of the drop prevention means 11 while increasing the length of the through hole 10. Thereby, the length of the joint part of the hosel part 2 and the removal prevention means 11 can be increased, and the adapter 3 can be securely prevented from coming off.

  Further, as shown in FIG. 5, the hosel hole 5 includes an upper stage 8 that fits the shaft insertion portion 9 and a lower stage 6 that fits the fixing portion 7. The hosel part 2 further includes a wall part 20 that defines a part of the lower end of the upper stage 8, a part of the upper end of the lower stage 6, and can contact the tip of the shaft insertion part 9. For this reason, when attaching the adapter 3 to the hosel part 2, a part of end surface of the shaft insertion part 9 can be made to contact the wall part 20, and the adapter 3 can be positioned. Thereafter, the hosel part 2 is attached to the hosel part 2, and the hosel part 2 is pulled out from the shaft insertion part 9 while applying a downward force (direction from the upper stage 8 to the lower stage 6 of the hosel hole 5) to the wall part 20. The prevention means 11 can be attached. This can also contribute to suppressing the inclination of the adapter 3 and reducing the gap between the hosel end and the adapter 3.

  As shown in FIG. 3, examples of the disconnection preventing means 11 include a fixing member having a threaded portion such as a bolt. At this time, by providing screw portions on both the wall portion 20 defining a part of the through hole 10 and the partial surface of the hosel part 2 facing the through hole 10, the prevention means 11 is prevented from coming out of the through hole 10. Can be screwed. Further, the removal preventing means 11 can be firmly attached to the hosel portion 2 by increasing the length of the wall portion 20 as much as possible. For this reason, the adapter 3 can be prevented from coming off.

  Next, a modification of the present embodiment will be described with reference to FIGS. The drop prevention means 11 in this modification has a main body part 11a, a projection part 11b, and a concave part 11c. In the example of FIGS. 6 and 7, the main body 11a has a substantially cylindrical shape, but any other shape is adopted as long as it includes a cylindrical portion having a threaded portion formed on the outer peripheral surface. can do. Screws are formed on the outer peripheral surface of the main body 11a.

  A protrusion 11b is provided at the tip of the main body 11a. As the shape of the protrusion 11b, any shape can be selected as long as it has a pressing surface capable of pressing the recess 12 on the axial end surface (upper surface). In the example of FIGS. 6 and 7, the protrusion 11b has a substantially cylindrical shape. The protrusion 11b protrudes in the axial direction from the tip of the main body 11a. The protruding portion 11b has a smaller diameter than the main body portion 11a. The protrusion 11b functions as a pressing portion that presses the adapter 3. By providing this projection part 11b, compared with the case where the adapter 3 is pressed with the main-body part 11a, the contact area with the adapter 3 can be made small. Thereby, the pushing force per unit area can be increased, and the adapter 3 can be firmly fixed to the hosel part 2 with a small force.

  The recess 11c is for inserting a jig such as a hexagon stick wrench for rotating the drop prevention means 11. The inner wall of the recess 11c has a shape corresponding to the outer shape of the jig, for example, a hexagonal planar shape. By inserting a part of the jig into the recess 11c and rotating the jig, the removal preventing means 11 can be rotated together with the jig. Thereby, the removal preventing means 11 can be attached to and detached from the hosel part 2.

  In the iron type club head 1, the adapter 3 is preferably formed from a single material such as titanium or a titanium alloy, but in the wood type club head 1, the adapter 3 is preferably formed from a composite metal material. For example, it is conceivable that the main body of the adapter 3 is made of an aluminum alloy and a member made of stainless steel such as SUS304 is attached to the surface of the recess 12. In the case of the wood type, it is necessary to increase the length of the adapter 3, and since titanium is too heavy, aluminum alloy is used, and in order to secure the strength of the pressing part, stainless steel is used only at that part. Is due to. In the wood type club head 1, for example, the length L1 of the shaft insertion portion 9 of the adapter 3 shown in FIG. 4 is 40.5 mm, the length L2 of the fixing portion 7 is 9.5 mm, and the depth of the upper stage of the hosel hole (Corresponding to L3 in FIG. 5) may be 26 mm, and the depth of the lower stage of the hosel hole (corresponding to L4 in FIG. 5) may be 12 mm.

DESCRIPTION OF SYMBOLS 1 Club head 2 Hosel part 3 Adapter 4 Shaft 5 Hosel hole 6 Lower stage 7 Fixing part 8 Upper stage 9 Shaft insertion part 10 Through-hole 11 Detachment prevention means 11a Main body part 11b Protrusion part 11c Recess part 12 Recess part 13 Shaft insertion hole 20 Wall part

Claims (5)

A shaft (4);
It has a shaft insertion part (9) provided with a shaft insertion hole (13) for fixing the shaft (4) at one end, and is provided integrally with the other end shifted from the central axis of the shaft insertion part (9). And an adapter (3) having a fixing part (7) provided with a recess (12) in at least a part of the peripheral wall surface;
A hosel having a through hole (10) extending from a hosel outer wall to the hosel hole (5) at a position corresponding to the concave portion (12) of the fixing portion (7) and a hosel hole (5) for inserting the adapter (3) A club head (1) having a portion (2);
The shaft (4) coming out prevention means (11) that presses the recess (12) through the through hole (10) ,
A golf club, wherein an inclined surface that is inclined so as to become deeper as it approaches the shaft insertion portion (9) side is provided at a portion of the bottom surface of the recess (12) where the drop prevention means (11) abuts . The fixing part (7) is provided at a position eccentric with respect to the central axis of the shaft insertion part (9),
The golf club according to claim 1, wherein the recess (12) is provided on a side wall of the fixing portion (7) located on a central axis side of the shaft insertion portion (9). The hosel hole (5) includes an upper stage (8) adapted to the shaft insertion part (9) and a lower stage (6) adapted to the fixing part (7),
The hosel part (2) defines a part of the lower end of the upper stage (8), defines a part of the upper end of the lower stage (6), and is a wall that can contact the tip of the shaft insertion part (9) The golf club according to claim 1, further comprising a portion (20).   The golf club according to claim 1, wherein the drop-off prevention means is a fixing member having a screw portion. The drop prevention means (11)
A main body (11a);
The projection (11b) which protrudes from the front-end | tip of the said main-body part (11a) to an axial direction, has a diameter smaller than the said main-body part (11a), and can press the said recessed part (12). Golf club.

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