JP2018023874A - Hollow golf club head and sole member to be attached/detached to/from hollow golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow golf club head configured to change attachment/detachment of a sole member according to preference of a user.SOLUTION: A metal golf club head with hollow structure includes a plurality of sole members 10, 110, and 210 selectable and exchangeable according to preference of a user, prepared for a sole part of one head body 1A having a face part. The sole part of the one head body includes a head-side flat surface, and each of the exchangeable sole members includes a sole-side flat surface that comes into surface contact with the head-side flat surface. The one head body and each exchangeable sole member include a common attachment/detachment structure having joining points at which fixing is made by fastening members operated using a tool, provided at the head-side flat surface and the sole-side flat surface. The plurality of exchangeable sole members with different surface shapes at the contact surface sides are prepared.SELECTED DRAWING: Figure 22

Description

The present invention relates to a hollow golf club head, and more particularly, to a hollow golf club head that allows a sole portion to be attached and detached according to the user's preference, and to be attached to and detached from such a hollow golf club head. The present invention relates to a sole member.
The hollow golf club head in the present invention is defined as a so-called fairway wood and a golf club head called a utility.

  In general, a metal golf club head having a hollow structure (hollow golf club head; hereinafter also referred to as a “head”) is formed by integrating a plurality of outer shell bodies (face portion, crown portion, sole portion, etc.). It has a structure. Usually, the outer shell constituting the head is formed by casting, forging, or the like, and the head is constituted by integrating the outer shells by welding or adhesion.

  Alternatively, a part of the outer shell body is replaced with another outer shell body (hereinafter, a part of the outer shell body constituting the head in which a part of the outer shell body is removed. It is also known that a head is configured by being fixed to a “head body” with a joining member such as a pin. For example, in Patent Document 1, the head is composed of two parts, an upper part excluding the sole part (head main body) and a lower part (sole part) formed separately from the upper part, and the upper part serving as the head main body. In addition, a configuration is disclosed in which a lower portion which is a sole portion is integrated by joining. The upper surface and the lower surface are formed on a single plane, and the head is manufactured by aligning the surfaces on a single plane and bonding them with a plurality of fastening members (bolts). Is done.

  Further, for example, Patent Document 2 discloses a head structure in which an opening is formed in the lower surface of the head body, and a plate-like sole member having a weight member fixed to the opening is joined with a fastening member made of a screw. Has been. The head main body and sole member are each formed with a recessed portion that is aligned at two locations on both sides of the face side and one in the center on the back side, and screws are screwed into a receiving tube formed on the head main body side. As a result, the head is manufactured by joining the two together.

Special table 2002-528238 JP2007-136068A

  Since the sole part disclosed in Patent Document 1 has a structure in which flat surfaces are faced to each other and a bolt is screwed from the vertical direction, a large force is concentrated on the bolt part when hitting a ball. In addition, it is necessary to increase the size of bolts or increase the number of bolts. In particular, unless the hole positions for inserting the bolts are processed and arranged with high accuracy, a strong load may be concentrated on some bolts and joint strength may be reduced.

  Further, in the configuration disclosed in Patent Document 2, the joining surface between the sole portion and the head main body is not a single flat surface (joining between the recessed portions), so that there is a backlash in the region where the screw is screwed. And abnormal noise (chattering noise) are likely to occur, and furthermore, the joining strength is unstable only by joining with a plurality of screws.

  As disclosed in Patent Documents 1 and 2 described above, the conventional head has a sole portion (sole member) that is the head main body so that weight adjustment in the sole portion can be easily performed in the manufacturing process. It is only the structure which forms with another body and joins this with a fastening member with respect to a head main body. This is a head structure (one golf club) as a single unit when it is put on the market as a golf club, and after the user purchases, the sole portion cannot be attached and detached according to each person's preference. .

  A hollow golf club head targeted by the present invention is mounted on a so-called fairway wood or a golf club called a utility, and mainly hits a ball on a lawn (including a rough) on the fairway. Therefore, when swinging and hitting a ball, the head moves while the sole portion is in contact with the grass. In this case, depending on the type of turf on the golf course (Western turf, Korean turf, wild turf, Bermuda turf, etc.) and season (summer turf, winter withered turf, etc.), the turf conditions under the ball vary greatly. For this reason, the head structure as a single unit, like a conventional golf club, cannot always hit the ball in an optimal state in various scenes. That is, there is no technical idea that a golf club called a conventional fairway wood or utility is changed to an optimum sole portion desired by the user according to the place and season.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a hollow golf club head in which the sole portion can be attached and detached according to the user's preference. In addition, the present invention provides a hollow golf club head in which such a hollow golf club head has a high joining strength of a detachable sole member and does not generate abnormal noise when hitting a ball. An object of the present invention is to provide a sole member that can be easily mounted and mounted with high accuracy.

In order to achieve the above-described object, the golf club head according to the present invention has a plurality of sole members 10 that can be selected and replaced according to the user's preference with respect to the sole portion of one head body 1A having a face portion. 110, 210 are hollow metal golf club heads, wherein the sole portion of one head body has a head-side flat surface, and each replaceable sole member is in contact with the head-side flat surface. A sole side flat surface is provided. Each of the sole members that can be exchanged with one head body has a common attachment / detachment structure in which a joint point that is fixed by a fastening member that is operated using a jig is provided on the head-side flat surface and the sole-side flat surface. And a plurality of replaceable sole members having different surface shapes on the ground contact surface side are prepared.

  According to the present invention, it is possible to obtain a hollow golf club head in which the sole portion can be changed according to the user's preference. In addition, in such a hollow golf club head, it is possible to obtain a configuration in which the bonding strength of the detachable sole member is high, and noise is not generated at the time of hitting, and the sole member can be easily attached to and detached from the head body. It becomes possible to mount with high accuracy.

1 is a plan view showing a first embodiment of a hollow golf club head according to the present invention. The figure which looked at the hollow golf club head shown in FIG. 1 from the heel side. The figure which looked at the hollow golf club head shown in FIG. 1 from the toe side. The figure which looked at the hollow golf club head shown in FIG. 1 from the sole side. Sectional drawing along the AA line of FIG. Sectional drawing along the BB line of FIG. Sectional drawing along CC line of FIG. 2 of the state which removed the sole member. The disassembled perspective view which shows the state which removed the sole member from the head main body. It is a figure which shows a sole member, (a) is a top view, (b) is a perspective view, (c) is a side view, (d) is a back view, (e) is a front view. The top view which shows 2nd Embodiment of the hollow golf club head based on this invention. The figure which looked at the hollow golf club head shown in FIG. 10 from the toe side. The figure which looked at the hollow golf club head shown in FIG. 10 from the sole side. FIG. 11 is a cross-sectional view taken along line DD in FIG. 10. Sectional drawing along the FF line of FIG. Sectional drawing along the EE line of FIG. 11 of the state which removed the sole member. The perspective view of a sole member. The disassembled perspective view which shows the state which removed the sole member from the head main body. The disassembled perspective view which shows 3rd Embodiment of the hollow golf club head which concerns on this invention, and shows the state which removed the sole member from the head main body. The disassembled perspective view which shows 4th Embodiment of the hollow golf club head based on this invention, and shows the state which removed the sole member from the head main body. Sectional drawing along the face-back direction of the hollow golf club head which shows 5th Embodiment of the hollow golf club head which concerns on this invention. The disassembled perspective view which shows 6th Embodiment of the hollow golf club head which concerns on this invention, and shows the state which removed the sole member from the head main body. (A)-(c) is a figure which shows the structural example of the sole member with which it mounts | wears with respect to a head main body, respectively.

Hereinafter, embodiments of a hollow golf club head and a sole member according to the present invention will be described.
1 to 9 are views showing a first embodiment of a hollow golf club head and a sole member according to the present invention. The hollow golf club head of the present invention (hereinafter referred to as the head) has a detachable sole member as a sole portion. As described above, in the present invention, the sole member is removed from the head. The thing is defined as "head body". As is generally known, the head body has a structure in which a plurality of outer shell bodies formed by casting, forging, or the like are integrated by welding, bonding, or the like. A plurality of types of sole members are prepared for the structure (head body) according to the user's preference, and each sole member is configured to be detachable from the head body.

  The head 1 according to this embodiment includes a face portion 2 having a hitting surface (face surface) 2a, a crown portion 3 extending rearward from the upper edge of the face portion 2, and extending rearward from a lower edge of the face portion 2. A sole portion 5 that faces the face portion 2, and a toe portion 7 and a heel portion 8 that pass from the face portion 2 through the back portion 6. In addition, since the back part 6, the toe part 7, and the heel part 8 connect the edge part of the said crown part 3 and the sole part 5, these are also called a side part. Further, as described above, the sole portion 5 has a structure in which the region can be attached and detached. Therefore, the attached / detached portion is referred to as the sole member 10, and the remaining portion is referred to as the sole portion (sole side) 5. . That is, the sole member 10 is attached to and detached from the head main body 1A including the face portion 2, the crown portion 3, the sole portion 5, the back portion 6, the toe portion 7, and the heel portion 8.

  The head main body 1A is configured by joining a plurality of outer shell members divided at various positions by welding, adhesion, or the like. Each outer shell member can be integrally formed, for example, by casting or press-molding a titanium alloy, an aluminum-based alloy, a magnesium alloy or the like, and the head main body 1A is created by welding each edge region. The In this case, the outer shell member constituting the head main body 1A is a casting of a plurality of members or partial components of each member, such as integrating the side portion and the sole portion, or integrating the crown portion and the side portion. Alternatively, they may be integrally formed and fixed by welding, bonding or the like. For this reason, the boundary of each part does not necessarily need to be clearly defined by the ridge line, and the back part 6, the toe part 7, and the heel part 8 continuously connect the crown part 3 and the sole part 5 without a boundary. You may be comprised with such a curved surface.

  The face portion 2 is integrally formed by, for example, pressing, NC processing (including CNC processing), or forging of titanium, a titanium alloy, etc. In addition to the above-described welding, for example, laser It is possible to join to other outer shell members by welding, brazing, adhesion or the like. The face portion 2 of the present embodiment is formed in a cup shape, and is joined to an opening formed at the front end of the crown portion 3, the sole portion 5 and the side portions (toe portion 7 and heel portion 8). It is configured. For this reason, the face part 2 of this embodiment comprises a part of crown part, side part, and sole part. Of course, with respect to the face portion 2, the ball striking face 2a is configured in a plate shape, and is fixed to the opening formed in the face portion, or the face member formed in the plate shape is attached to the crown portion, It may be configured to be joined to the sole part and the front end opening of the side part. Regarding the material of the head body, in the case of a head with a small capacity, a stainless steel alloy including the face member may be used.

  Further, the head 1 is integrally formed with a hosel portion 9 for fixing the tip of a shaft (not shown). The hosel portion 9 is provided so as to protrude upward from the face heel side of the crown portion 3, and a golf club is configured by fitting and fixing the tip end portion of the shaft in the opening hole 9 a. .

  As described above, the detachable sole member 10 is attached to the sole portion 5 of the head 1. In this case, it is preferable that the face-side edge 10a of the sole member 10 to be mounted is in a state of being separated from the head main body 1A, that is, the front edge 10a of the sole member 10 is open. Specifically, as shown in FIG. 5, it is sufficient that the edge 10a is configured not to contact any of the head main body 1A. In this embodiment, the surface of the sole portion 5 is set in the toe-heel direction. In addition to the sole member 10, it is configured to be separated from the front end edge of the sole portion 5 by forming a groove 5 a along the toe-heel direction in this portion.

  By forming the groove 5a as described above in the sole portion 5, it is possible to reduce the impact acting on the face portion at the time of hitting and prevent the impact from being directly transmitted to the sole member 10. That is, the groove 5a extending in the toe-heel direction has a shock absorbing structure at the time of hitting the ball, and by providing such a buffering structure, it is possible to prevent the shock from being directly transmitted to the attached sole member 10, The sole member 10 can be made difficult to come off from the head body 1.

  The buffer structure of the present embodiment is formed in a groove shape by folding back the surface on the sole side of the face portion 2, but it is sufficient that the front of the front end of the sole member 10 is open, not a groove structure. Also good. Further, as described above, if the end edge 10a of the sole member 10 is separated from the head main body 1A (if the face side of the end edge 10a is in an open state), the sole member 10 formed so as to project forward. (In FIG. 5, a sole member whose edge 10a is shifted to the region of the groove 5a is attached). In this case, the center of gravity can be shifted forward as a head.

  The groove 5a constituting the buffer structure has different impact buffering effects depending on its thickness. Actually, it is preferable that the thickness of the portion where the face portion 2 is folded back on the back side of the face surface 2a (return portion 2b; see FIG. 5) is smaller than the center thickness of the face portion. It is good to set in the range of 6-2.4 mm, and it is preferable to set it as 0.9-1.5 mm especially.

  The buffer structure not only forms the groove as described above in the sole portion, but also forms at least one of the crown portion 3, the sole portion 5, and the side portions (toe portion 7 and heel portion 8). You can keep it. In the present embodiment, grooves 3 a, 5 a, 7 a, and 8 a are formed in the respective parts, respectively, and a one-round structure is formed together with the grooves 5 a formed in the sole part 5. In this way, by forming a groove having a buffering action over the entire circumference on the face side of the head, it is possible to more effectively transmit the hitting impact to the rear even for the variation in hitting points at the time of hitting. It is possible to mitigate, and it is possible to mitigate the impact on the sole member 10. Note that the depth, width, and thickness of the head at each portion are appropriately set in consideration of the impact buffering effect.

As described above, the sole member 10, which is a separate member from the head main body, is detachably attached to the sole portion (sole side) 5 of the head main body 1 </ b> A by the fastening member 30.
Hereinafter, a specific configuration of the sole member and a detachable structure between the head body and the sole member will be described.

  As the sole member 10, it is preferable to use a material that is relatively heavier than the constituent material of the head body in order to lower the center of gravity of the head. Specifically, it is preferable that the weight including the sole member 10 and the fastening member 30 is 30 to 120% with respect to the weight of the entire head (as an example, the sole member is 95 g of a stainless material, The head main body is 110 g of titanium alloy and the fastening member 30 is 2.5 g of one). Alternatively, as the sole member 10, a material having a large specific gravity compared to the constituent material of the head body (for example, stainless steel, copper alloy, tungsten alloy, etc., the specific gravity difference is 1: 1.5 or more compared to the constituent material of the head body. Is preferably used.

However, if the sole member is made to be a detachable structure and the weight of the sole member 10 is increased, the inertial force of the sole member increases, and there is also an unusual noise (chattering noise) that is easily released by the impact of the detachable structure. It gets bigger. In addition, when the specific gravity of the sole member is increased, the sole member becomes smaller with respect to the inertia force of the sole member, thereby reducing the relative fastening area, and the above-mentioned separation of the sole member and generation of abnormal noise are generated. The possibility of becoming larger will also increase.
In the present invention (this embodiment), the sole member and the attachment / detachment structure of the sole member with respect to the head main body are configured as follows, so that the sole member is not easily detached from the head main body, and abnormal noise is generated when the ball is hit. That is restrained.

  The mounting structure of the sole member 10 and the sole portion 5 of the head main body 1A to which the sole member 10 is mounted includes a flat surface that is in contact with each other. What is necessary is just to be provided in P.

  In the present embodiment, as shown in FIG. 8, the flat surface on the head body side (head-side flat surface) is such that the exposed surface of the sole portion 5 (the back surface on the sole side of the head body) is open on the face side. The head side flat surface 5A is formed by recessing into a substantially triangular shape and flattening the surface. For this reason, the periphery of the head-side flat surface 5 </ b> A is a rotation regulating wall 5 </ b> B that faces (may contact) the outer edge of the sole member 10. Further, the sole member 10 is formed in a substantially triangular shape so as to have the same shape as the concave head side flat surface 5A as described above, and the surface thereof is flattened (NC processing as will be described later). A sole-side flat surface 10A is formed (see FIG. 9).

  Thus, when the sole member 10 is mounted on the head main body 1A, the flat surfaces 10A and 5A come into surface contact with each other, and the two are joined by fastening the fastening member 30 at the joining point provided in the flat region. In this case, since the outer edge of the sole member 10 is in a state in which the rotation is restricted by the rotation restriction wall 5 </ b> B, even if a load in the rotation direction acts on the sole member 10, the load acts on the fastening member 30. There is nothing. That is, it is possible to improve the bonding strength of the face member, and it is possible to suppress the generation of abnormal noise because no load acts on the portion of the fastening member 30.

  By forming the sole member in a substantially triangular shape, it becomes easy to manufacture the sole member, and the function as the sole of the head is also preferable. Further, the outer edges of the rotation restricting wall 5B and the sole member 10 are formed with high precision, and when the sole member 10 is mounted on the flat surface of the recessed portion of the sole portion 5, the outer edges of the rotation restricting wall 5B and the sole member 10 are in close contact with each other. Since the sole member 10 can be positioned if it is in a state of being slightly separated (the rotation regulating wall 5B and the outer edge of the sole member 10 constitute a positioning means), as described later. The positioning means by the circular opening 5C and the circular protrusion 10C that are in a fitting relationship may be omitted.

  Further, the sole member 10 having an optimal structure that the user prefers is selected and mounted on the head main body 1A according to the type of turf of the golf course and the season. The sole member 10 in the present embodiment has a structure including four protrusions 10b provided side by side so as to extend in the face-back direction on the grounding surface (back surface 10B) side. As shown in FIG. 2, the protrusion 10b is formed so as to protrude downward from the back surface 10B of the sole member, so that the center of gravity of the head can be lowered. Further, since the protrusion 10b provided side by side extends in the face-back direction, it is possible to reduce the resistance to the grass when hitting.

The head main body 1A and the sole member 10 as described above are provided with positioning means for positioning both of them in close contact with each other in their opposing regions.
Even if there are a large number of sole members to be exchanged for one head main body 1A, this positioning means makes it easy to give a proof of each sole member to the head main body when mounting each sole member to the head main body. Any device may be used as long as it facilitates positioning. By providing such positioning means, the mounting and dismounting operation of the sole member with respect to the head body can be easily performed with high accuracy. That is, the positioning means is positioned by closely contacting both members such that the components of the head main body 1A and the components of the sole member 10 are fitted to each other separately from the fastening member that fixes the head main body and the sole member. If there is a function to be.

Hereinafter, the configuration of the positioning means of this embodiment will be described.
The positioning means 50 of the present embodiment is provided in the central region of the sole portion 5 and the sole member 10 of the head main body, and the joining point P is disposed outward in the radial direction of the positioning means 50. The positioning means 50 is configured by a protrusion 10C formed on the sole member 10 and a receiving portion 5C formed on the sole portion 5 of the head main body 1A, both of which are in close contact with the head main body when the sole member 10 is mounted. It can be positioned in the state. Further, the protrusion 10C and the receiving portion 5C are preferably formed so as to be perpendicular to the sole-side flat surface 10A and the head-side flat surface 5A.

  Specifically, the protrusion 10C is configured as a cylindrical body having a circular cross section perpendicular to the sole-side flat surface 10A, and the receiving part 5C is formed as a circular opening so that such a cylindrical body having a circular cross section can be fitted. (Hereinafter, referred to as a circular protrusion 10C and a circular opening 5C). In this way, by forming the projecting portion into a hollow cylindrical body, the positioning means can be reduced in weight and the weight can be easily adjusted. Further, by providing the receiving portion on the head main body side and forming a circular opening, it is possible to attach a heavy object or the like to the internal space of the head main body 1A, and the weight can be easily adjusted.

  In the present embodiment, the circular opening 5C is formed in the region of the head-side flat surface 5A (see FIG. 8), and the circular protrusion 10C is formed by recessing the central region from the sole-side flat surface 10A. (See FIGS. 5, 6 and 9). That is, the circular protrusion 10C is preferably formed so as to be recessed from the sole-side flat surface 10A, and the bottom of the circular protrusion 10C is considered to have a step structure (bottom portions 10d and 10d) in consideration of the balance of the wall thickness, the center of gravity position, and the like. '). The bottom portion is recessed from the sole-side flat surface 10A in this way, because this position is the upper part of the center of the sole, so that it cannot be expected to contribute to low center of gravity or horizontal (toe / heel direction) inertia. Therefore, it is better to leave this part as a space and to provide the corresponding weight in another part.

  The circular opening 5C and the circular protrusion 10C are preferably formed so that their diameters are in the range of 25 to 42 mm. Here, the reason why the diameter is in the above-described range is to facilitate the assembling work of both members. In particular, by setting the diameter to 25 mm or more, a finger can be inserted into the circular opening 5C, and the circular opening 5C By inserting a finger into the head main body 1A via the head, it becomes possible to easily carry out a heavy material affixing operation or a dust removal operation during assembly.

  If the diameter is too large, the contact area between the flat surfaces of the sole member 10 and the head main body 1A and the portion for receiving the fastening member 30 become relatively small, and the degree of freedom in design becomes worse. Is preferably set to 42 mm or less. That is, by setting the diameter to 42 mm or less, a sufficient contact area between the flat surfaces can be secured, and a formation portion of a screw hole 5f to be described later can be secured largely. The positional relationship with the screw hole 5f is difficult to change, and load concentration on the screw portion can be prevented.

  A joining point P for fixing the sole member 10 to the head main body 1A is disposed on a portion that is a flat surface of the sole member 10 and the head main body 1A, apart from the positioning means described above. A fastening member (stop screw) 30 for fixing both members is screwed into the joining point P, and an opening 10f is formed in the sole member 10 so that the fastening member 30 can be inserted. Yes. As shown in FIG. 8, the fastening member 30 includes a head 30a, and a jig (a dedicated jig or a general screwdriver) is inserted into this portion to perform a fixing operation. Therefore, the opening 10f has a stepped shape so that the head is not exposed from the back surface 10B of the sole member (see FIG. 5). Further, when the fastening member 30 is screwed, an O-ring 31 is interposed to prevent loosening. As described above, the attachment / detachment structure using the retaining screw makes it possible to easily attach / detach the sole member.

  A screw hole 5f is formed in the head-side flat surface 5A of the head body 1A at a position corresponding to the opening 10f when the sole member 10 is positioned. That is, when the circular protrusion 10C of the sole member 10 is fitted into the circular opening 5C, the opening 10f on the sole member side and the screw hole 5f on the head main body side are formed to coincide with each other. P).

  The joining point P in this embodiment is installed radially outward with respect to the positioning means 50, and is configured so that the sole member can be joined stably. In this case, there are three joining points P, and the placement positions of the respective joining points are equidistant from the center of the positioning means 50, so that the load at each joining point acts in a well-balanced manner. Therefore, even if a gap is generated, it is possible to absorb with good balance. In particular, in the present embodiment, three joint points are arranged at substantially equal intervals in the circumferential direction (two locations on the toe side and heel side on the face side, and one location on the center side on the back side). It becomes possible to fix the sole member 10 with a good balance.

  It is preferable that an elastically deformable O-ring 35, such as rubber, is interposed at a portion where the head main body 1 </ b> A and the sole member 10 are in contact with each other outward in the radial direction of the circular protrusion 10 </ b> C. That is, the portion where the positioning means is provided is in close contact, and moisture, dust and the like enter the head main body from this portion or cause noise, so an O-ring may be interposed. preferable. Specifically, in the present embodiment, a circumferential groove 10h is formed around the circular protrusion 10C of the sole member 10, and an O-ring 35 is fitted into this portion.

The O-ring 35 having a diameter of about 1.5 to 3.6 mm is preferably used as described above, and is interposed between the sole-side flat surface 10A and the head-side flat surface 5A as in the present embodiment. By doing so, it is possible to obtain a waterproof effect, to suppress variations in the feel at impact, and to improve the feel at impact.
The O-ring 35 only needs to be disposed in a region where the head body 1A and the sole member 10 are in contact with each other. It becomes possible.

Further, the sole member 10 may be configured as a flat surface other than the region of the positioning means 50, but it is preferable to form a concave groove 10m at an appropriate place on the flat surface as in this embodiment. The concave grooves 10m can be formed, for example, intermittently along the circumferential direction around the circular protrusion 10C (see FIG. 9), continuously, or scattered. .
By forming such a concave groove, it is possible to dispose resin, metal, or the like in the inside thereof, and it is possible to easily adjust the weight balance and the center of gravity. Moreover, you may form such a ditch | groove in the head side flat surface 5A of the head main body 1A.

  In addition to the four protrusions 10b as described above, the back surface 10B of the sole member 10 is used, for example, by cutting the surface to form a recessed flat surface 10n to reduce the contact area with the ground. It can be appropriately modified according to the mode.

  The head main body 1A is formed with a protruding wall 5g that protrudes into the internal space of the head main body along the edge of the circular opening 5C and that contacts the outer surface of the circular protrusion 10C (see FIG. 7). The circular protrusion 10C is brought into surface contact within a long range along the axial direction. By forming the protruding wall 5g in this way, the perpendicularity of the contact surface of the circular protrusion 10C with respect to the flat surfaces 5A and 10A is more stable, so that the strength in the contact region can be improved and the generation of abnormal noise is effective. Can be prevented.

  A rib 5h is formed on the inner surface 5D on the head body side of the sole portion 5 of the head body 1A so as to go from the circular opening of the head body toward the side wall. A plurality of ribs 5h having a height of about 1.0 to 3.0 mm are preferably formed. By forming such ribs, deformation of the head-side flat surface 5A can be prevented. Is possible. In particular, such a rib 5h is integrated with the protruding wall 5g, and the screw hole 5f of the fastening member 30 is disposed on the rib, whereby the positional relationship between the circular opening 5C and the screw hole 5f. Is less likely to change, and the concentration of the load acting on the screw hole from the fastening member 30 is prevented to prevent abnormal noise from being generated.

  The sole member 10 and the sole portion 5 of the head main body 1A as described above are preferably formed by NC (CNC) processing, and the sole-side flat surface 10A of the sole member 10 and the head main-body-side flat surface of the head main body 1A. By NC machining 5A, the close contact state (positioning) of both can be obtained with high accuracy. In particular, the sole member 10 is NC-processed in addition to the flat surface 10A, the circular protrusion 10C and the screw hole 10f, and the contour thereof (preferably NC-processed once fixed to the jig). Thus, the accuracy of the sole member can be improved, for example, the degree of perpendicularity of the circular protrusion 10C with respect to the flat surface 10A can be accurately obtained, and the same processing is applied to a plurality of prepared sole members. Thus, all the sole members can be manufactured with the same accuracy.

  Further, since the positioning means 50 by the circular protrusion 10C and the circular opening 5C is provided on the head body 1A and the sole member 10 formed with high accuracy as described above, when mounting the sole member 10 to the head body 1A, The fitting accuracy between the two becomes high, and accurate positioning can be performed. The head-side flat surface 5A and the sole-side flat surface 10A are in contact with each other, and a fastening member 30 (joining point P) for fastening the two is disposed at this portion. Therefore, the bonding strength is increased, and a large load can be prevented from being applied to each fastening member 30. As a result, when an impact at the time of hitting the ball is applied to the face portion, there is no rattling or abnormal noise (buzzing noise) in the area of the fastening member, and both are brought into close contact (fitting) by the positioning means. This also stabilizes the bonding strength.

Next, another embodiment of the present invention will be described.
In the embodiments described below, the same reference numerals are assigned to the same configurations as those in the above-described embodiments, and detailed descriptions thereof are omitted.

10 to 17 are views showing a second embodiment of the hollow golf club head according to the present invention.
In the present embodiment, grooves 3a and 5a for reducing impact are formed in the crown portion 3 and the sole portion 5 of the head, and no grooves are formed in the side portions. Thus, even if the groove portion is formed in the crown portion and the sole portion, a sufficient buffering action can be obtained, and the sole member 110 can be hardly detached from the head main body 1A. Further, the plurality of protrusions extending in the face-back direction as in the first embodiment are not formed on the back surface 110B of the sole member 110, and the recesses 110a and 110b are formed in the toe side region and the heel side region, respectively. doing. That is, by forming concave portions on the toe side and the heel side of the back surface of the face member, the ground contact area is reduced and the sole resistance with the turf is reduced.

  Further, in the present embodiment, as shown in FIGS. 13 and 15, each rib 5h ′ formed on the inner surface 5D on the head main body side of the sole portion 5 of the head main body 1A is connected to the side wall without being connected to the side wall. It ends at the part of. By doing this, by not forming a groove in the side wall as described above, even if an impact acts on the side wall at the time of hitting, the impact is not transmitted to the screw hole 5f or the circular opening 5C portion. (The generation of abnormal noise can be prevented).

  Further, in the present embodiment, the rotation restricting wall 5B as shown in FIG. 8 is not formed, and the sole portion 5 of the head main body is formed to be a flat surface as a whole. That is, a wider contact surface between the flat surfaces of the head body and the sole member is ensured so that a stable joined state can be obtained. In this case, since the sole member 110 receives a force in the rotation direction by the positioning means 50 by the circular protrusion 10C and the circular opening 5C, it is preferable to separately provide a rotation restricting means for the sole member 110.

Specifically, for example, the rotation restricting boss 120 may be fitted closer to the face side than the positioning means 50. That is, a boss hole 121 that receives one end of the boss 120 is formed in the sole portion 5 of the head body 1A, and a boss hole 122 that receives the other end of the boss 120 is formed at a corresponding position on the sole member 110 side. When the sole member 110 is mounted on the head main body, the boss 120 serving as a rotation restricting member may be fitted into each boss hole 121 and 122 to fix them (see FIGS. 13 and 17).
Even in such a configuration, when the sole member 110 receives a force in the rotational direction, the load does not act on the fastening member 30, so that the joining strength can be improved and the generation of abnormal noise can be prevented. it can.

  When using the boss 120 for restricting rotation as described above, the boss hole 121 on the head main body side has a rib 5h '' formed on the inner surface 5D on the head main body side as shown in FIG. It is preferable to arrange on the rib. As a result, even if a large rotational load acts on the boss 120, it is possible to improve the bonding strength.

FIG. 18 shows a third embodiment of the hollow golf club head according to the present invention, and is an exploded perspective view showing a state in which the sole member is detached from the head main body.
The positioning means 50 in the above-described embodiment forms a cylindrical body (circular protrusion 10C) having a circular cross section in the central region of the sole members 10 and 110, and receives the cylindrical body in the sole portion of the head body. Although the opening 5C is formed, the cross-sectional shape of the cylindrical body constituting the positioning means 50 is not limited to a circular shape, and can be variously modified.

  Specifically, in the present embodiment, as shown in FIG. 18, a cylindrical body (frame body) 210 </ b> C having a square (regular polygon) cross section is formed on the sole member 210, and the sole portion 5 of the head main body 1 </ b> A. On the flat surface 5A, a square opening 205C into which such a cylindrical body 210C is inserted is formed so as to be in close contact with each other.

According to such positioning means, since the rotation of the sole member 210 around the positioning means is restricted, a rotation restricting wall 5B is formed on the sole portion 5 of the head body as shown in FIG. As shown in FIG. 17, it is not necessary to provide the rotation restricting boss 120, and the configuration can be simplified.
In addition, about such a protrusion (cylindrical body), although it is preferable to comprise a cross-sectional regular polygon, it does not necessarily need to be a regular polygon, and if the difference of a long and short side is not large, it is arbitrary polygonal shapes. There may be. Or you may comprise in cross-sectional ellipse shape. Further, the back surface structure (ground structure) is configured as shown in FIG.

FIG. 19 shows a fourth embodiment of the hollow golf club head according to the present invention, and is an exploded perspective view showing a state in which the sole member is removed from the head body.
In the embodiment described above, the positioning means 50 has a protrusion (circular protrusion 5C, protrusion 210C having a rectangular cross section) on the sole member side, and a receiving portion (circular opening 10C, rectangular opening 205C) on the head body side. Although formed, such protrusions and receiving portions may be reversed. That is, a protruding portion (cylindrical body 5F having a circular cross section) may be formed on the sole portion side of the head main body 1A, and a receiving portion (circular opening 310F) may be formed on the sole member 310 side.
Even if it is such a structure, the effect similar to above-described embodiment can be acquired.

FIG. 20 shows a fifth embodiment of a hollow golf club head according to the present invention, and is a cross-sectional view along the face-back direction of the hollow golf club head.
In the positioning means 50 in the above-described embodiment, the protrusion and the receiving part are integrally formed on the head main body and the sole member, respectively, but the member that fits both is configured as a member separate from the head main body and the sole member. May be.

  For example, as shown in FIG. 20, an annular recess 10 </ b> F is formed in the sole member 10, and a metal annular body 70 is fitted (may be bonded) to this portion, The sole member 10 and the head main body 1 </ b> A may be positioned by tightly engaging between the body 70 and the circular opening 5 </ b> C. That is, according to such a configuration, it is possible to select an optimal material in consideration of the constituent materials of the sole member 10 and the head main body 1A.

FIG. 21 shows a sixth embodiment of the hollow golf club head according to the present invention, and is an exploded perspective view showing a state in which the sole member is removed from the head body.
In this embodiment, a plurality (three places) of positioning means for tightly engaging the head main body 1A and the sole member 410 are formed. That is, the positioning means 50 has a plurality of projections (projections having a circular cross section and a solid shape) 5H formed on the sole portion side of the head main body 1A, and such projections 5H are closely engaged with the sole member 410 side. A plurality of fitting holes 410C are formed. Further, the joining points P where the fastening members for joining the head body and the sole member are disposed are disposed between the three positioning means 50 (approximately equal intervals along the circumferential direction). Even if a load is applied to 410, the load is not concentrated on one junction point.

  As described above, a plurality of positioning means can be formed, and the configuration in which the sole member is brought into close contact with the head main body can be appropriately modified. For example, in addition to the above-described configuration, the close engagement between the uneven surfaces may be used, or the close engagement between the uneven surfaces may be combined with the close engagement between the protrusion and the receiving portion as described above. good.

FIGS. 22A to 22C are diagrams showing a configuration example of a sole member attached to the head main body 1A.
As described above, the present invention is characterized in that a sole member having a different structure can be attached to and detached from one head main body 1A depending on the situation. For example, the sole member 10 shown in the first embodiment (FIG. 22B), the sole member 110 shown in the second embodiment (FIG. 22A), and a plurality of curved surfaces (formed on the toe side). Sole member 210 (FIG. 22C) in which the ground contact area is reduced by forming curved surface 210a, curved surface 210b formed on the heel side) and inclined surface (inclined surface 210c gradually rising toward the back side). ) Etc., a large number of sole members are prepared for the head body so that the user can select and install the optimum sole member according to the season, place, lawn condition, and the like.

  As described above, even if a large number of sole members are prepared, each sole member can be positioned with high precision by means of close contact with the head body. Even if it is attached, it is possible to effectively prevent the generation of abnormal noise.

1 head (hollow golf club head)
DESCRIPTION OF SYMBOLS 1A Head main body 2 Face part 3 Crown part 5 Sole part 5A Head side flat surface 10,110,210,310,410 Sole member 10A Sole side flat surface 30 Fastening member 50 Positioning means P Joining point

Claims (4)

A hollow metal golf club head in which a plurality of sole members that can be selected and replaced according to user's preference are prepared for a sole portion of one head body having a face portion,
The sole portion of the one head body includes a head-side flat surface, and each replaceable sole member includes a sole-side flat surface in contact with the head-side flat surface,
The one head body and the replaceable sole members each have a joint point on the head-side flat surface and the sole-side flat surface that is fixed by a fastening member operated using a jig. It has a common detachable structure,
2. The golf club head according to claim 1, wherein a plurality of the replaceable sole members having different surface shapes on the contact surface side are prepared. The plurality of selectable and replaceable sole members are provided with protrusions extending in the face-back direction on the ground contact surface, formed with recesses on the toe side region and the heel side region, a curved surface, and / or The golf club head according to claim 1, wherein at least one of the inclined surfaces is included. 3. The golf club head according to claim 1, wherein the one head body and each of the selectable and replaceable sole members have positioning means that are in close contact with each other and perform positioning of both. Around the flat surface on the head side, there is provided a rotation restricting wall facing the outer edge of the sole member to be mounted, and the sole member to be selected and exchanged is restricted from rotating with respect to the head body. The golf club head according to any one of claims 1 to 3, wherein the golf club head is fixed by the above.