JP2013031594A - Golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club having a structure in which a head and a shaft are separably connected while having an appearance similar to a general golf club, and having no risk of dropping a screw element.SOLUTION: The golf club includes: a hosel part having a shaft insertion hole to which a shaft is inserted; an female screw hole on the bottom of the hole to insert a shaft; a head having a jig insertion hole penetrating to a head bottom face on the bottom of the female screw hole; a sleeve that is externally fixed to an end of the shaft and is inserted into the shaft insertion hole together with the shaft; and a screw element prevented from coming off and freely rotatably held on an end of the sleeve. Then, a jig is inserted from the head bottom face into the jig insertion hole and the screw element is driven into the female screw hole by rotating the screw element by the inserted jig.

Description

  The present invention relates to a golf club having a structure in which a head and a shaft are detachably coupled.

  As a trend in the golf industry in recent years, we are providing golf clubs suitable for each user by fitting to fit the user's body shape, swing, etc. In other words, the maker side has the largest lie angle in the number one club A plurality of types of heads having different lengths and a plurality of types of shafts having different lengths, weights, or hardnesses are prepared, and a common and separable coupling structure is set. The user performs a trial combination by appropriately combining these at the store, and purchases the combination that best suits the user.

  For this reason, golf clubs having a structure in which the head 101 and the shaft 102 are detachably coupled have been proposed as shown in FIGS. 7 to 9, but these conventional techniques have the following disadvantages.

  The golf club shown in FIG. 7 has a structure in which the shaft 102 is fastened and fixed to the head 101 by screwing the cap 104 into the hosel upper end 103 and deforming the sleeve 105. Therefore, although it has sufficient performance in terms of the function of separating the head 101 and the shaft 102 in a separable manner, it has a special structure in which the cap 104 is screwed into the upper end portion 103 of the hosel. This is quite different from a general golf club (a golf club whose head and shaft are not separable). Therefore, there is a risk of feeling uncomfortable when addressed as a user (see Patent Document 1).

  The golf club shown in FIG. 8 or FIG. 9 has a structure in which a screw member 107 is screwed from the bottom surface 106 side of the head 101 so as to detachably couple the head 101 and the shaft 102. Therefore, even if the screw is initially strongly screwed, there is a risk that the screw member 107 will gradually loosen during use and the screw member 107 may fall off below the head 101 (see Patent Document 2 or 3).

Utility Model Registration No. 3132153 JP 2009-148560 A Special table 2010-502399

  In view of the above, the present invention is not a structure in which a cap is screwed into the upper end portion of the hosel while being structured to detachably connect the head and the shaft, and thus the appearance of the golf club is equivalent to a general golf club, It is an object of the present invention to provide a golf club that does not have a structure in which a screw member is screwed from the bottom surface side of the head, and therefore does not cause the screw member to drop off.

  In order to achieve the above object, a golf club according to claim 1 of the present invention is a golf club having a structure in which a head and a shaft are detachably coupled, and a shaft insertion hole into which the shaft is inserted is provided in a hosel portion and the shaft. A head provided with a female screw hole at the bottom of the insertion hole, a jig insertion hole penetrating to the bottom of the head at the bottom of the female screw hole, and the shaft insertion hole together with the shaft, which is externally fixed to the end of the shaft A screw member that is inserted into the sleeve, and a screw member that is held at the tip of the sleeve so as to be freely rotatable, and is inserted into the jig insertion hole from the bottom side of the head, The screw member is screwed into the female screw hole by rotating the screw member with the inserted jig. That.

  The golf club according to claim 2 of the present invention is the golf club according to claim 1, wherein the screw member engages with a hook-shaped engagement portion provided on the inner peripheral surface of the sleeve. A relatively large-diameter head to be stopped and a relatively small-diameter male screw portion protruding from the tip of the sleeve are integrally provided, and a jig for engaging the jig with the tip surface of the male screw portion. An instrument engaging portion is provided.

  The golf club according to claim 3 of the present invention is the golf club according to claim 1 or 2, wherein an adhesive interposed between the inner peripheral surface of the sleeve and the outer peripheral surface of the shaft reaches the screw member. Thus, a plug for sealing the adhesive is provided between the shaft and the screw member in the sleeve so as not to hinder free rotation.

  The golf club according to a fourth aspect of the present invention is the golf club according to the first, second, or third aspect, wherein an adhesive interposed between the inner peripheral surface of the sleeve and the outer peripheral surface of the shaft is the screw member. In the sleeve, a plug for sealing the adhesive is provided between the shaft and the screw member so that the free rotation is not hindered and the plug contacts the screw member and is free. A step-like engagement portion for positioning and engaging the plug is provided on the inner peripheral surface of the sleeve so as not to hinder the rotation.

  A golf club according to a fifth aspect of the present invention is the golf club according to the first, second, third, or fourth aspect described above, in which both are prevented from rotating between the sleeve and the hosel portion into which the sleeve is inserted. An anti-rotation structure is provided.

  The golf club according to claim 6 of the present invention is the golf club according to claim 1, 2, 3, 4 or 5, wherein the inner diameter dimension of the female screw hole is smaller than the inner diameter dimension of the shaft insertion hole. In addition, by setting the inner diameter dimension of the jig insertion hole smaller than the inner diameter dimension of the female screw hole, a considerably smaller jig insertion hole is opened only on the sole surface of the head.

  The golf club according to claim 7 of the present invention is the golf club according to claim 1, 2, 3, 4, 5 or 6, wherein the sleeve is made of a plurality of metal materials having different specific gravities. The sleeves of the kind are prepared, and one of the sleeves is selected and used.

  Furthermore, the golf club according to claim 8 of the present invention is the golf club according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the golf club is a wood club, an iron club, or a putter. It is characterized by being.

  In the golf club of the present invention having the above-described configuration, as a connecting structure of the head and the shaft, a shaft insertion hole is provided in the hosel portion of the head, a female screw hole is provided in the bottom portion of the shaft insertion hole, and the bottom portion of the female screw hole The jig insertion hole is provided so as to penetrate to the bottom surface of the head. On the other hand, the sleeve is extrapolated and fixed to the end portion of the shaft, and the screw member is held at the tip end portion of the sleeve so as to be free to rotate. Then, the screw member on the shaft side is screwed into the female screw hole on the head side.

  As a procedure of the connecting operation, first, a screw member is assembled to the sleeve, and the sleeve assembled with this screw member is externally fixed to the end portion of the shaft. For example, an adhesive is used as the joining means for extrapolation. Next, the sleeve is inserted into the shaft insertion hole together with the shaft, and the jig is inserted into the jig insertion hole from the bottom surface side of the head. When the screw member is rotated by the inserted jig, the screw member is screwed into the female screw hole, thereby connecting the head and the shaft. Further, when the screw member is rotated in the opposite direction by the jig, the screw member is removed from the female screw hole, so that the head and the shaft are separated by pulling the shaft together with the sleeve. When combining a head and another shaft, a sleeve prepared for each shaft is used.

  Therefore, the golf club of the present invention does not have a part corresponding to the cap in the above prior art, and does not have a structure in which the cap is screwed into the upper end portion of the hosel. It becomes equivalent. In addition, the golf club of the present invention does not have a structure in which the screw member is screwed from the bottom surface side of the head in the above-described prior art, and thus the screw member is not likely to fall off.

  The screw member that is held at the tip of the sleeve and is held so as to be freely rotatable is a relatively large screw member that is secured by engaging with a hook-like engagement portion provided on the inner peripheral surface of the sleeve. It is preferable to integrally include a head having a diameter and a relatively small-diameter male screw portion protruding from the tip of the sleeve, and according to this, the function of preventing the screw member from coming off the sleeve Both of the functions of the screw member to rotate freely with respect to the sleeve are realized. In this case, it is desirable to provide a jig engaging portion for engaging the jig on the front end surface of the male screw portion.

  Further, when an adhesive is used as a joining means for extrapolating and fixing the sleeve to the end portion of the shaft, there is a concern that the adhesive reaches the screw member and hinders free rotation of the screw member. Therefore, in order to prevent this, it is preferable to provide a plug for sealing the adhesive between the shaft and the screw member inside the sleeve. According to this, the adhesive does not reach the screw member by the plug. Therefore, it is possible to ensure free rotation of the screw member.

  Further, when a plug is provided between the shaft and the screw member in this way, there is a concern that the free contact of the screw member may be hindered when the plug contacts the screw member. In order to cope with this, it is preferable to provide a stepped engagement portion for positioning and engaging the plug on the inner peripheral surface of the sleeve. According to this, the plug is attached to the screw member by the engagement portion. Therefore, free rotation of the screw member can be ensured.

  In addition, since the golf club of the present invention is such that the screw member on the shaft side is screwed into the female screw hole on the head side, there is a concern that the mounting angle of the head with respect to the shaft may be changed by the rotational torque generated at the time of hitting. Therefore, in order to prevent this, it is preferable to provide a rotation prevention structure between the sleeve and the hosel part into which the sleeve is inserted so that the rotation of both is prevented. Therefore, the mounting angle of the head with respect to the shaft can be maintained as initially set.

  In addition, since the golf club of the present invention is provided with a jig insertion hole that penetrates to the bottom surface of the head, if the opening through the jig insertion hole is too large, for example, the back face of the iron head is partially removed. There is a concern that the appearance of the head will deteriorate. Therefore, to prevent this, the inner diameter of the female screw hole is made smaller than the inner diameter of the shaft insertion hole with respect to the structure of the head, and the inner diameter of the insertion hole is set smaller than the inner diameter of the female screw hole. Therefore, it is preferable to have a structure in which a considerably small jig insertion hole is opened only on the sole surface of the head. According to this, since the opening due to the jig insertion hole is difficult to see, the appearance of the head is improved. It becomes possible to do.

  In addition, since the golf club of the present invention prepares a sleeve for each shaft as described above, if the sleeve used for the heavy shaft and the sleeve used for the light shaft have the same weight, the weight balance of the entire club is delicate. There is concern about the impact. Therefore, in order to take measures against this, it is preferable to prepare a plurality of types of sleeves made of metal materials having different specific gravities, and to select and use one of these sleeves. For example, it is possible to stabilize the weight balance by using a heavy sleeve for a heavy shaft and a light sleeve for a light shaft.

  The connecting structure of the head and the shaft according to the present invention can be applied to any of a wood club, an iron club, and a putter.

  In the present invention having the above configuration, since the head and the shaft are connected inside the hosel by the combination of the female screw hole and the screw member, it is not necessary to screw the cap into the upper end portion of the hosel, so that the appearance of the golf club is generally It is equivalent to a golf club. Further, since the screw member is incorporated into the hosel while being held by the sleeve, there is no possibility that the screw member falls off. Therefore, it is possible to provide a golf club that has a structure in which the head and the shaft are detachably coupled, but has an appearance equivalent to that of a general golf club, and in which there is no possibility that the screw member will drop off.

  Further, by providing a plug inside the sleeve, it is possible to suppress the adhesive from inhibiting free rotation of the screw member, and by providing an engaging portion for positioning on the inner peripheral surface of the sleeve, the plug can be free from the screw member. Inhibiting rotation can be suppressed. In addition, the rotation of the head relative to the shaft can be suppressed by providing a detent structure between the sleeve and the hosel, and the appearance of the head can be improved by setting the inner diameter of the jig insertion hole small. Can do. Further, by preparing a plurality of types of sleeves having different specific gravities, the weight balance of the golf club can be stabilized, and the above-described effects can be realized in all of the wood club, the unan club and the putter. .

Sectional drawing of the head and shaft connection structure with which the golf club which concerns on the Example of this invention is provided. Sectional drawing which shows the state before the assembly of the connection structure The principal part front view which shows the state before the assembly of an iron club provided with the connection structure Cross section of the iron club The principal part front view which shows the state before the assembly of the wood club provided with the connection structure Cross section of the main part of the wood club Sectional drawing of the principal part of the golf club which concerns on a prior art example The perspective view which shows the state before the assembly of the golf club which concerns on another prior art example. Front view showing a state before assembly of a golf club according to another conventional example

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 and FIG. 2 show a head and shaft connection structure provided in a golf club 1 according to an embodiment of the present invention. 3 and 4 show a case where this connecting structure is applied to an iron club, and FIGS. 5 and 6 show a case where this connecting structure is applied to a wood club. The connection structure is configured to detachably couple the head and the shaft, and is configured as follows.

  That is, as shown in FIGS. 1 and 2, first, as a configuration on the head 11 (see FIGS. 3 to 6) side, the shaft 21 is inserted into the hosel part 13 integral with the head body 12 (see FIGS. 3 to 6). The shaft insertion hole 14 is provided, a female screw hole 15 is provided at the bottom of the shaft insertion hole 14, and a jig insertion hole 16 is provided at the bottom of the female screw hole 15 up to the head bottom surface 11a (see FIGS. 3 to 6). It is provided to penetrate. On the other hand, as a configuration on the shaft 21 side, a sleeve 31 is extrapolated and fixed to an end portion of the shaft 21, and a screw member 41 is retained at a distal end portion (lower end portion) of the sleeve 31 so as to be freely rotatable. Has been. The screw member 41 on the shaft 21 side is screwed into the female screw hole 15 on the head 11 side.

  The sleeve 31 is a cylindrical part, and includes a small-diameter portion 32 disposed inside the shaft insertion hole 14 after connection, and a hosel portion after connection via an annular step portion 33 at the upper end of the small-diameter portion 32. A large-diameter portion 34 that is disposed above 13 and has substantially the same diameter as the hosel portion 13 is integrally formed. Further, the socket part 35 is integrally formed further above the large-diameter part 34. However, the socket part 35 may be a separate component with respect to the sleeve 31 as shown in FIG. Further, a hook-like engagement portion 36 is provided on the inner peripheral surface of the sleeve 31 at the lower end of the small diameter portion 32, that is, the lower end of the sleeve 31, and the sleeve 31 is positioned above the hook-like engagement portion 36. A step-like engagement portion 37 is provided on the inner peripheral surface of the first step.

  The screw member 41 is inserted into the sleeve 31 from its upper end opening, and is prevented from coming down downward by engaging with a hook-like engagement portion 36 provided on the inner peripheral surface of the sleeve 31. A relatively large-diameter head portion 42 is provided, and a relatively small-diameter male screw portion 43 protruding downward from the lower end portion of the sleeve 31 is integrally formed on the lower surface side of the head portion 42. Also, jig engaging portions 44 for engaging jigs (not shown) to the upper surface of the head 42, that is, the upper surface of the screw member 41, and the lower surface of the male screw portion 43, that is, the lower surface of the screw member 41, respectively. In this embodiment, a rod-shaped hexagon wrench is assumed as a jig, and therefore hexagonal holes are provided as the jig engaging portions 44 and 45, respectively.

  The sleeve 31 is externally fixed to the end portion of the shaft 21, and an adhesive (not shown) is used as a joining means. The adhesive is interposed between the inner peripheral surface of the sleeve 31 and the outer peripheral surface of the shaft 21 corresponding thereto, and if the excess of the adhesive reaches the screw member 41 and hardens, the screw Since the free rotation of the member 41 is hindered, a plug 51 for sealing an adhesive is provided between the shaft 21 and the screw member 41 inside the sleeve 31 to prevent this. The plug 51 is a small disk-shaped component having substantially the same diameter as the inner diameter of the sleeve 31.

  Further, if the plug 51 comes into contact with the screw member 41, the free rotation of the screw member 41 is hindered. Therefore, the plug 51 is provided on the inner peripheral surface of the sleeve 31 to prevent this. It is positioned and arranged by engaging with a stepped engagement portion 37. Therefore, the distance from the hook-shaped engaging portion 36 to the step-shaped engaging portion 37 is set to be slightly larger than the thickness of the head portion 42 of the screw member 41.

  Further, between the sleeve 31 and the hosel portion 13 into which the sleeve 31 is inserted, there is provided a rotation preventing structure 61 for preventing both the rotations 13, 31. Specifically, the rotation preventing structure 61 is abutted against each other. Polygonal shapes (for example, octagonal shapes) 62 and 63 respectively corresponding to the step portion 33 of the sleeve 31 and the upper end portion of the hosel portion 13 are formed. That is, the outer peripheral surface of the sleeve 31 is not a cylindrical surface but a polygonal shape 62 below the step portion 33, and the inner peripheral surface of the upper end portion of the hosel portion 13 is not a cylindrical surface but a polygonal shape 63 correspondingly. ing. Accordingly, since the polygonal shapes 62 and 63 are engaged with each other in the circumferential direction, the sleeve 31 and the hosel portion 13 into which the sleeve 31 is inserted are prevented from rotating together, and thus the shaft 21 and the head 11 are prevented from rotating. Further, the inner peripheral surface of the upper end portion of the hosel portion 13 is preferably processed into a tapered surface shape in order to prevent the shaft 21 from being broken.

  The shaft insertion hole 14, the female screw hole 15 and the jig insertion hole 16 provided in the head 11 are arranged on the same central axis 0. In these dimensional relationships, the inner diameter dimension of the female screw hole 15 is set smaller than the inner diameter dimension of the shaft insertion hole 14, and the inner diameter dimension of the jig insertion hole 16 is set smaller than the inner diameter dimension of the female screw hole 15. Therefore, the inner diameter dimension of the jig insertion hole 16 is set to be as small as about 4 mm in actual size. Therefore, the jig insertion hole 16 that is as small as about 4 mm in actual size is opened only on the sole surface of the head 11 as shown in FIG. 4 or FIG.

  The sleeve 31, the screw member 41, and the plug 51 are all metal parts.

  When assembling the golf club 1 having the above-described configuration, that is, when connecting the head 11 and the shaft 21, the screw member 41 and the plug 51 are first assembled to the sleeve 31 from the state of FIG. 2, and then the screw member 41 and the plug 51 are assembled. The sleeve 31 is externally fixed to the end of the shaft 21 using an adhesive. Next, the sleeve 31 is inserted into the shaft insertion hole 14 together with the shaft 21, and a jig (not shown) is inserted into the jig insertion hole 16 from the head bottom surface 11a side. When the tip of the inserted jig engages with the jig engaging portion 45 of the screw member 41 and rotates, the male screw portion 43 of the screw member 41 is screwed into the female screw hole 15, and the lower end of the sleeve 31. When the portion hits the bottom surface of the shaft insertion hole 14, the sleeve 31 is strongly tightened between the head portion 42 of the screw member 41 and the bottom surface of the shaft insertion hole 14. At this time, before the tightening reaches the final stage, the rotation direction of the head 11 and the shaft 21 is matched, and the rotation preventing structure 61 (polygonal shapes 62, 63 between the outer peripheral surface of the sleeve 31 and the upper end of the hosel portion 13 is provided. ) Can be accurately aligned with the head 11 and the shaft 21. When the tightening is completed, the head 11 and the shaft 21 are firmly tightened between the head portion 42 of the screw member 41 and the bottom surface of the shaft insertion hole 14 and the rotation preventing structure 61 is engaged as described above. Therefore, even if it connects firmly and the rotational torque by the reaction force at the time of a hit ball acts on the head 11, a connection does not loosen. Regarding the action of this rotational torque, it is preferable to set the direction of the screwing spiral by the screw member 41 and the female screw hole 15 so that the screwing is deepened when this torque is applied. Becomes more difficult to loosen.

  Further, when disassembling the golf club 1 having the above configuration, that is, when separating the head 11 and the shaft 21, a jig is inserted into the jig insertion hole 16 from the head bottom surface 11 a side, and the tip of the jig is fixed to the screw member 41. When engaged with the tool engaging portion 45 and rotated in the opposite direction, the male threaded portion 43 of the screw member 41 is detached from the female threaded hole 15, so that the shaft 21 is pulled out of the hosel portion 13 after being detached. The shaft 21 is separated. At this time, since the sleeve 31 remains fixed to the end portion of the shaft 21 using an adhesive, when the head 11 and another shaft 21 are combined, a new sleeve 31, screw member 41, and plug are attached to each shaft 21. 51 are prepared and used.

  In relation to the replacement of the shaft 21, as described above, if the sleeve 31 used for the heavy shaft 21 and the sleeve 31 used for the light shaft 21 have the same weight, the weight balance of the entire club may be slightly affected. Since there is a concern, it is preferable to prepare a plurality of types of sleeves 31 made of metal materials having different specific gravities as the sleeve 31, and to select and use one sleeve 31 from these. Therefore, the heavy sleeve 21 is used for the heavy shaft 21 (for example, a stainless steel sleeve 31 is used), or the light shaft 31 is used for the light shaft 21 (for example, a titanium alloy sleeve 31 is used). Thus, the weight balance of the golf club 1 can be stabilized.

  As described above, FIGS. 3 and 4 show a case where the connection structure is applied to an iron club, and FIGS. 5 and 6 show a case where the connection structure is applied to a wood club. Can be applied to a putter (not shown), and in any case, as the intended purpose of the present invention, the golf club has a general appearance with a structure in which the head 11 and the shaft 21 are detachably coupled. It is possible to provide the golf club 1 that is equivalent to the above and that does not cause the screw member 41 to fall off. Further, by providing the plug 51 inside the sleeve 31, it is possible to suppress the adhesive from inhibiting free rotation of the screw member 41, and the positioning engagement portion 37 is provided on the inner peripheral surface of the sleeve 31. Thus, it is possible to suppress the plug 51 from inhibiting the free rotation of the screw member 41. Further, by providing a detent structure between the sleeve 31 and the hosel part 13, it is possible to suppress the rotation of the head 11 with respect to the shaft 21, and by setting the inner diameter dimension of the jig insertion hole 16 to be small. Eleven looks can be improved. Further, by preparing a plurality of types of sleeves 31 having different specific gravities, the weight balance of the golf club 1 can be stabilized, and these effects can be realized in all of the wood club, the unan club, and the putter. it can.

  The above-described embodiment will be further described. As a configuration of the screw member 41, the base end portion (root portion) of the male screw portion 43 is substantially the same diameter as the root diameter of the male screw 46 in which the male screw 46 is not cut. The cylindrical surface portion 47 is provided over a predetermined length, and the length of the cylindrical surface portion 47 is substantially equal to the thickness of the hook-shaped engaging portion 36. As a configuration of the sleeve 31, a female screw 38 that is screwed with the male screw 46 of the male screw portion 43 is cut on the inner peripheral surface of the hook-shaped engaging portion 36. These relationships are as follows.

  That is, when the screw member 41 is inserted from the upper end opening of the sleeve 31 in the state shown in FIG. 2, the thread of the male screw 46 is caught by the thread of the female screw 38. Stops in contact. In this stopped state, when a jig (not shown) is inserted from the upper end opening of the sleeve 31 and the tip of the jig is engaged with the jig engaging portion 44 provided on the upper surface of the screw member 41, the jig 31 rotates. The male screw 46 is screwed into the female screw 38 and eventually passes through the female screw 38 and protrudes to the lower surface side of the sleeve 31. With the male screw 46 protruding, the screw member 41 is engaged with the hook-like engagement portion 36 at the head portion 42, so that the screw member 41 is prevented from coming off downward with respect to the sleeve 31. Further, the cylindrical surface portion 47 is positioned on the inner peripheral side of the female screw 38 in a state where the male screw 46 protrudes, so that the screw member 41 can be freely rotated with respect to the sleeve 31. Further, even if an attempt is made to pull the screw member 41 upward with the male screw 46 protruding, the thread of the male screw 46 is caught by the thread of the female screw 38, so that the screw member 41 is pulled upward with respect to the sleeve 31 unless rotated. Stopped. Therefore, the screw member 41 is integrated with the sleeve 31 while being freely rotatable in a state where the screw member 41 is assembled to the sleeve 31, and both 31 and 41 do not fall apart, so that it is possible to improve the workability of handling parts. .

  Therefore, the configuration improves the handling operability of the parts in this way, but the configuration is not necessary if it is allowed for both 31 and 41 to be separated. That is, in this case, it is not necessary to provide the female screw 38 on the inner peripheral surface of the hook-shaped engaging portion 36, and it is not necessary to provide the cylindrical surface portion 47 at the base end portion of the male screw portion 43. What is necessary is just to set the internal diameter dimension of the engaging part 36 larger than the mountain diameter of the external thread 46. FIG.

DESCRIPTION OF SYMBOLS 1 Golf club 11 Head 11a Head bottom surface 12 Head main body 13 Hosel part 14 Shaft insertion hole 15 Female screw hole 16 Jig insertion hole 21 Shaft 31 Sleeve 32 Small diameter part 33 Step part 34 Large diameter part 35 Socket part 36 Bowl-shaped engagement Part 37 Stepped engaging part 38 Female screw 41 Screw member 42 Head 43 Male screw part 44, 45 Jig engaging part 46 Male screw 47 Cylindrical surface part 51 Plug 61 Non-rotating structure 62, 63 Polygonal shape 0 Center Axis

Claims (8)

A golf club having a structure in which a head and a shaft are detachably coupled,
A head provided with a shaft insertion hole for inserting the shaft in the hosel portion, a female screw hole at the bottom of the shaft insertion hole, and a jig insertion hole penetrating to the bottom of the head at the bottom of the female screw hole, and the shaft A sleeve that is externally fixed to the end of the shaft and inserted into the shaft insertion hole together with the shaft, and a screw member that is held at the tip of the sleeve and is held free to rotate.
A golf club, wherein a jig is inserted into the jig insertion hole from the bottom surface side of the head, and the screw member is screwed into the female screw hole by rotating the screw member with the inserted jig. The golf club according to claim 1,
The screw member includes a relatively large-diameter head that is engaged with a hook-shaped engagement portion provided on an inner peripheral surface of the sleeve and is prevented from coming off, and a relatively small-diameter male that protrudes from the tip of the sleeve. A golf club comprising a screw portion and a jig engaging portion for engaging the jig with a tip surface of the male screw portion. In the golf club according to claim 1 or 2,
The adhesive interposed between the inner peripheral surface of the sleeve and the outer peripheral surface of the shaft does not reach the screw member and impede free rotation, and between the shaft and the screw member inside the sleeve. A golf club comprising a plug for sealing an adhesive. The golf club according to claim 1, 2, or 3,
The adhesive interposed between the inner peripheral surface of the sleeve and the outer peripheral surface of the shaft does not reach the screw member and impede free rotation, and between the shaft and the screw member inside the sleeve. A plug for sealing the adhesive is provided, and a stepped engagement for positioning and engaging the plug with the inner peripheral surface of the sleeve so that the plug does not interfere with free rotation by contacting the screw member A golf club characterized in that a portion is provided. In the golf club according to claim 1, 2, 3, or 4,
A golf club characterized in that an anti-rotation structure is provided between the sleeve and the hosel part into which the sleeve is inserted to prevent the both from rotating. In the golf club according to claim 1, 2, 3, 4 or 5,
By making the inner diameter dimension of the female screw hole smaller than the inner diameter dimension of the shaft insertion hole and setting the inner diameter dimension of the jig insertion hole smaller than the inner diameter dimension of the female screw hole, the jig insertion is much smaller. A golf club characterized in that a hole opens only in a sole surface of a head. In the golf club according to claim 1, 2, 3, 4, 5 or 6,
As the sleeve, a plurality of types of sleeves made of metal materials having different specific gravities are prepared, and one sleeve is selected and used. In the golf club according to claim 1, 2, 3, 4, 5, 6 or 7,
The golf club is a wood club, an iron club, or a putter.

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