JP2008079979A - Golf club with iron head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club allowing minute position control before an annular weight body having a heavy weight positioned to a specified area positively is welded to the back side of a head body. <P>SOLUTION: The back side of a head main body is made so that a protruding section TB protruding from the central area of the sole section area SL1 of the head body to the back side is piled up on an annular jointing flat surface SH formed as a flat surface. A jointing surface SM of the head body is formed with the jointing flat surface excluding the area of the protruding section. The generating line of the side face of the protruding section is oriented in the vertical direction, which is the direction between the sole section and top section, and is parallel with the jointing surface. The weight body is annular, has more weight in the toe side and heel side than in other areas and has a weight body jointing face SM' whose shape corresponds to the jointing surface of the head body. The weight body is made so that there is no engagement for the minute position control when the position of the weight body is slightly controlled vertically in a state where the weight body jointing face and the jointing surface of the head body are made to abut on each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, a weight body is joined in an annular shape to the back side of the head body, and a large amount of weight is disposed on the toe side and the heel side of the sole portion, and a large amount of weight is provided in the center region in the vertical direction of the toe portion. The present invention relates to a golf club having an iron head.

As a device to lower the iron head's center of gravity and deepen it, expand the sweet area, stabilize the ball at the time of hitting, and make it easy to lift the hit ball, a heavy body is placed on the back side of the head body. It has been broken. The following patent documents are examples of such.
JP-A-8-294552 Japanese Patent Laid-Open No. 10-15125 Utility Model Registration No. 3089247

However, when an annular weight body is joined to the back side of the head body, each member is separately formed by casting, forging, or the like, and then combined to form later, so that these are integrally formed due to manufacturing accuracy. Compared to the case, a step or the like is likely to occur in the outer shape. For this reason, after joining, the process which grinds the protrusion part of an outer shell is required. We want to minimize these processing operations, and we also want to reduce the subsequent grinding work from the aesthetic point of view, especially for the top part, which is highly visible and important in design.
Therefore, the problem to be solved is a golf having an iron head that is annular and can be finely adjusted before a weight body positively arranged in a predetermined region is welded to the back side of the head body. This is a club offer.
Another object of the present invention is to provide a golf club having an iron head that makes it difficult to see the joint through the cavity recess on the back side after joining.

  In the first aspect of the invention, a head body having an annular portion having a region that becomes at least a part of each of the top portion, the toe portion, the sole portion, and the heel portion, and a shaft mounting portion into which the shaft can be inserted, except for the face portion. A golf club having an iron head formed by welding a heavy body made of a member having a specific gravity greater than that of the head body on the back side of the head body, the back surface of the head body having an annular joining plane formed in a single plane In contrast, the center region in the front-rear direction of the sole portion region of the head body is provided so as to overlap the protruding portion that bulges to the back side, and the protruding portion is located on the back side in the plan view shape of the head. A toe-side side surface and a heel-side side surface of a certain projecting portion side surface are continuous at an acute angle with respect to the joining plane, and the projecting portion side surface and the joining plane excluding the region of the projecting portion head Forming a joint surface of the body, the side surface of the projecting portion has a bus bar, the bus bar is directed in the vertical direction, which is a direction connecting the sole portion and the top portion, and is parallel to the joint plane, and the weight The body has an annular shape, and a concave portion corresponding to the protruding portion is provided in the central region of the sole portion region, and more weight members are disposed on the toe side and the heel side than the central region. The weight body joint surface corresponding to the joint surface of the head body, and when the weight body is finely adjusted in the vertical direction in a state where the weight body joint surface and the joint surface of the head body are in contact with each other. The front-rear direction, which is the direction in which the weight body is connected to the toe portion and the heel portion in a state in which there is no portion to be caught in the fine adjustment movement and the weight body bonding surface and the bonding surface of the head body are in contact with each other If you try to move the fine adjustment to A portion to be to provide a golf club having a iron head, characterized in that there is no other than the protrusion.

In the head, the face portion may be formed separately from another member, or may be formed integrally with the head body, but the head body here is considered to exclude these face portions.
The annular joining plane is a joining surface when the existence of the protruding portion is eliminated, and actually the joining surface of the head main body where the protruding portion exists is a surface that is actually joined. The annular joint plane is described for convenience of explanation of the shape of the joint surface, but the remaining part exists as a part of the entire actual joint surface, except for the region of the protrusion. ing.
Since the toe side surface and the heel side surface of the projecting portion are continuous at an acute angle with respect to the joining plane, specific examples of the projecting portion are trapezoidal, rice ball, arc, and ellipse. And the like, and these modified shapes are intended to exclude rectangular shapes, inverted trapezoids, and the like.

  In the second invention, in the sole portion region of the weight body, it protrudes toward the face side at a position above the weight body joint surface and not to be caught by the fine adjustment movements in the vertical direction and the front-back direction. An iron golf club according to the first invention having a flange portion is provided.

  In a third aspect of the present invention, there is provided a golf club having the iron head according to the first aspect or the second aspect, wherein the concave portion is provided with an appropriate gap in a state where the fitting with the protruding portion is loosened.

  According to a fourth aspect of the present invention, a head main body having an annular portion having a region that becomes at least a part of each of the top portion, the toe portion, the sole portion, and the heel portion, and a shaft mounting portion into which the shaft can be inserted, except for the face portion. A golf club having an iron head formed by welding a heavy body made of a member having a specific gravity greater than that of the head body on the back side of the head body, the back surface of the head body having an annular joining plane formed in a single plane On the other hand, the center region in the vertical direction of the toe portion region of the head main body is a recess recessed to the face side, and the recess has a top side surface and a sole side surface of the recess surface in the shape of the head end view. Each of them is continuous at an obtuse angle with respect to the bonding plane, and the concave surface and the bonding plane excluding the concave portion form the bonding surface of the head body, and the concave surface has a bus bar. The generatrix is oriented in the front-rear direction, which is the direction connecting the heel portion and the toe portion, parallel to the joining plane, the weight body is annular, and the central region in the toe region corresponds to the recess. The bulging portion is provided, and more weight members are arranged in the central region than the top side and the sole side, and the weight body joining surface corresponding to the joining surface of the head body is provided. When the weight body is finely adjusted in the front-rear direction in a state where the body joint surface and the joint surface of the head body are in contact with each other, there is no portion that becomes a hook for the fine adjustment movement, and the weight body joint surface When the weight body is finely adjusted in the up-down direction, which is the direction connecting the top portion and the sole portion, with the joint surface of the head body being in contact, the portion that becomes a hook for the fine adjustment movement is It has no feature other than the bulge To provide a golf club with Ian head.

  In the fifth invention, in the toe portion region of the weight body, toward the face side at a position on the heel side in the vicinity of the weight body joint surface that does not catch each fine adjustment movement in the vertical direction and the front-rear direction. A golf club having an iron head according to the fourth aspect of the invention having a protruding flange portion is provided.

  In a sixth aspect of the present invention, there is provided a golf club having the iron head according to the fourth aspect or the fifth aspect, wherein the concave portion is provided with an appropriate gap in a state where the fitting with the bulging portion is loosened. To do.

  In the first invention, there is no portion other than the projecting portion that becomes a hook for the fine adjustment movement in the front-rear direction in a state where the joint surfaces are in contact with each other, and the joint surface is formed as described in the above invention. Therefore, relative movement in the vertical direction is possible with the joint surface of the head main body and the weight body in contact with each other. On the other hand, the relative movement in the front-rear direction is such that the protrusion bulges at an acute angle with respect to the joining plane, and the inclination angle between the toe side surface and the heel side surface is not a right angle or more, either If the weight body is slightly moved along the side surface, the predetermined amount of the weight body is moved in the front-rear direction, and the joint surfaces in the vicinity of the projecting portions are separated by a distance corresponding to the acute angle value to form a gap. This separation distance is unrealistic if the protrusion is rectangular, because it is separated by the length of one side of the rectangle, but is acute, that is, inclined, It only needs to be lifted by a minute amount corresponding to a slight adjustment movement amount in the direction. Since the joint surface is annular, it can be contacted in the top region even if it is slightly separated in the sole region where the protrusions exist, so that the gap is filled by welding the entire circumference of the joint. It can be joined sufficiently. In this way, the outer edge of the head body and the weight body can be aligned to the required extent in the top part and the front and rear toe parts or heel parts, so the amount of grinding of these aligned outer parts is minimal. Therefore, it is possible to reduce the grinding work as a whole, while hardly damaging the aesthetics of these parts.

  In 2nd invention, it can prevent that said clearance gap is visible from a golfer by a flange part, and aesthetic quality improves.

  The gap described in the first invention is a case where the protruding portion of the head main body and the concave portion of the weight body to be fitted correspondingly fit with no gap at all. As in the invention, in order to ensure the fitting, an appropriate clearance is provided between the two parts. Therefore, in practice, due to the existence of the clearance gap, it is possible to prevent the gap between the joint surfaces other than the projection portion area in the vicinity of the projection portion when adjusted and moved in the front-rear direction.

  The fourth invention is similar to the first invention, and the differences are as follows. That is, the weight is arranged in the central region of the toe part, and for the description of the invention, the concave part is described instead of the protruding part of the head main body, and the bulging part is described instead of the concave part on the weight body side. In addition, the concave portion is continuous with the joining plane has an obtuse angle that is the opposite of the acute angle (the same acute angle when expressed by the bulging portion of the weight body), the bus of this concave portion is oriented in the front-rear direction, For this reason, in the fourth aspect of the invention, the fine adjustment movement in the vertical direction of the first aspect of the invention corresponds freely. If the difference in the bus direction (adjustment movement direction) due to the difference in the weight arrangement location is taken into consideration, the operational effect of the fourth invention can be easily inferred from the operational effect of the first invention, and substantially the same operational effect is achieved.

The operational effects of the fifth invention are substantially the same as those of the second invention.
The operational effects of the sixth invention are substantially the same as those of the third invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a state in which a golf club having an iron head 10 according to the present invention and having a shaft mounted on its hosel part H is placed on a horizontal plane according to a lie angle θ, and FIG. FIG. 3 is a rear view of the back side, and FIG. 4 is an exploded perspective view of the head body 12 and the weight body 14 except for the face plate FH. The head 10 has a top part TP, a toe part TU, a sole part SL, a heel part HL, and a hosel part H, and a metal face plate FH constituting a face part is disposed on the front part. Yes.

  A part TP1 of the top part TP, a part TU1 of the toe part TU, a part SL1 of the sole part SL, and in this example, the whole part HL1 of the heel part HL are annularly integrated and a through hole is formed in the center part. The head main body 12 having 12KK and further integrating the hosel part H is formed by casting a metal such as titanium alloy or stainless steel. A face plate FH is disposed on the step portion DS of the head body 12. On the other hand, the weight body 14 is disposed on the back side of the head main body and welded to each other. The weight body 14 is formed of a metal material having a specific gravity larger than that of the material of the head body 12, such as a tungsten alloy, by casting, and has a through hole 14 KK at the center. The back side cavity recess KK of the head is formed by a part of the through holes 14KK and 12KK. The head body and the weight body may be formed by forging.

  The weight body 14 is formed by annularly integrating a part TP2 of the top part TP, a part TU2 of the toe part TU, a part SL2 of the sole part SL, and a part HL2 near the heel part HL in this example. Yes. In addition, the weight of the sole portion region SL2 is larger than that of the top portion region TP2, thereby reducing the center of gravity, and compared with the center region of the sole portion region, the toe side region and the heel side A large amount of weight is arranged in the area, and the aim is to improve the moment of inertia so that the ball can be hit stably even when hit at the toe side or the heel side. As a result, the central region of the sole portion region SL2 of the weight body 14 is a recess OB that is recessed in the back side direction.

  For this reason, the center area | region of sole part area | region SL1 of the head main body 12 has the protruding part TB bulged to the back side. Further, on the back surface of the head main body, an annular joining plane SH (assuming that it also exists in the region of the projecting portion) formed in one plane is provided. That is, a single flat joining plane SH is formed on each back side of the top portion region TP1, the toe portion region TU1 and the sole portion region SL1 excluding the protruding portion TB, and the regions near the heel portion region HL1. The protrusion side surface TH on the back side of the protrusion TB is formed at an acute angle with the joining plane SH. As shown in FIG. 7, which is a cross-sectional view taken along line GG in FIG. 2, the acute-angled continuity is a toe side surface TH <b> 1 that is a part of the projecting portion side surface TH of the projecting portion TB, Means that the heel side surface TH2 is continuous at an angle of less than 90 degrees with respect to the joining plane SH. A preferable example of the acute angle is 20 to 45 degrees.

  The protruding portion side surface TH has a generatrix like a cylindrical surface, and the generatrix is oriented in the vertical direction, which is a direction connecting the sole portion SL and the top portion TP, and is parallel to the joining plane SH. The protruding portion side surface TH is a surface in such a generatrix direction, and an annular surface obtained by combining the side surface TH and the bonding plane SH is a bonding surface SM (indicated by hatching in FIG. 4) of the head body 12. The vertical direction does not need to be limited to a strict direction, and is not a front-rear direction or a left-right direction.

  On the other hand, the weight body 14 has a weight body bonding surface SM 'having a shape corresponding to the bonding surface SM of the head body on the face side. The width of these annular joint surfaces SM and SM 'is, for example, 1.5 mm or more. In this case, the reason why the width of the joint surface is set to 1.5 mm or more is that the amount of fine adjustment movement described later is less than 1.5 mm. That is, having more than the distance of fine adjustment movement enables stable work. However, it can be readily understood that there is no inconvenience in joining even if a part of the annular joining surface is missing. If the annular joining surface is missing over a long range in the annular direction or has a width that is less than or equal to the distance of fine adjustment movement over the long range, there may be a problem in the joining operation. Therefore, it is preferable to have a width equal to or greater than the distance of fine adjustment movement (for example, 1.5 mm) over the majority of the annular shape.

  FIG. 9 is a front view schematically showing a case where the weight body 14 is overlapped with the head main body 12 with the joint surfaces in contact with each other. In this case, a relative positional relationship is shown in which the portion HL2 near the heel portion of the weight body 14 is pressed against the stepped wall of the heel portion region HL1 of the head main body 12 and the sole portion region outline is substantially aligned. . The top portion region outer edge TP1F of the head body 12 and the top portion region outer edge TP2F of the weight body 14 are large and deviate as shown in the figure. Further, the toe region outer edge TU1F of the head body 12 and the toe region outer edge TU2F of the weight body 14 are shifted as shown in the figure. Therefore, when the weight body 14 is shifted downward and moved forward by a minute amount as shown in FIG.

  In the state shown in FIG. 10, the outer edges of the top region substantially coincide with each other, and the upper half of the toe region outer edge TU1F of the head body 12 and the upper half of the toe region outer edge TU2F of the weight body 14 substantially coincide with each other. Instead, the lower half of the toe part region and the sole part region of the weight body 14 protrude from the corresponding part of the head body 12. Further, a gap corresponding to the adjustment movement is generated between the step wall of the heel portion region HL1 of the head body 12 and the portion HL2 near the heel portion of the weight body 14. Such a gap can be filled by welding. In this state, welding is performed along the joining edge line, and then the welded portion and the protruding portion are ground to align the outline, thereby completing the head 10. Among the adjustment movements, in the forward movement, as described above, a region where the joint surfaces SM and SM ′ are slightly separated from each other may be formed near the projecting portion TB of the sole portion SL. The resulting gap is partially exaggerated and shown in FIGS. 5, 6, 7 and 8 below.

  5 is a cross-sectional view taken along line EE in FIG. 2, FIG. 6 is a cross-sectional view taken along line FF, FIG. 7 is a cross-sectional view taken along line GG, and FIG. The cross-sectional views shown in FIG. 1 correspond to the state before grinding the welded portion. As shown by broken lines in FIGS. 5 and 6, the joining plane SH forming a part of the joining surface SM is formed in one plane, and the protrusion TB is formed on the back side from the plane formed by the joining plane SH. It bulges out. It also appears in the drawing that the generatrix of the projecting portion side surface TH, which is the back side of the projecting portion TB, is parallel to the joining plane SH.

  Further, on the upper side in the vicinity of the weight body bonding surface SM ′ of the sole portion area SL2 of the weight body 14, the flange portion F faces the face side while being separated from the upper end of the sole portion area SL1 of the head body 12 by a predetermined amount. Protruding. Since this flange portion F is separated from the upper end surface of the sole portion region of the head main body by a predetermined amount, when the weight body 14 is finely adjusted in the vertical direction with respect to the head main body 12, the movement is caught. In addition, there are no other parts that can be used for fine adjustment movement. This is a structure that does not exist except for the projecting portion TB with respect to the fine adjustment movement in the front-rear direction.

  As can be seen from FIG. 8, the flange portion F is provided in a range that almost covers the joint line LL between the joint surfaces of the head main body and the weight body in the sole portion over the length direction. Accordingly, it is possible to prevent the gap from being visually recognized through the back side cavity KK of the head 10. Further, in order to ensure that the weight body 14 is assembled to the head body 12, the concave portion OB of the weight body 14 is usually appropriately dimensionally larger than the outer shape of the protrusion TB of the head body 12 (the fitting is loose). Make) If there is an appropriate small gap between the two portions, when the fine adjustment movement is made in the front-rear direction, the head contact surface SH (joint surface SM) on the head body 12 side and the weight facing the head portion 12 near the projecting portion. Generation of a slight separation gap with the joint surface SM ′ on the body 14 side can be prevented.

  Furthermore, although the joint part of both the members 12 and 14 is welded over the outer periphery of a head, the molten metal at this time can penetrate | invade into a clearance gap, and can also block | close the clearance gap (a part). Y is a welding part and has shown the state before grinding.

  FIG. 11 is an end view for explanation after the fourth invention, and is a view of the head portion of the golf club placed on the lie angle as seen from the toe side. The weight body 14 ′ in this case is also annular, and a bulging portion TB ′ is formed by bulging the center region in the vertical direction of the toe portion region toward the face side. On the other hand, the head main body 12 'is also annular, and a toe portion region central region is formed as a recess OB' that is recessed toward the face side. The two parts are joined so as to fit them together. However, in consideration of the difference in the location of heavy weight and the difference in the direction of orientation of the bus (difference in the adjustment movement direction), the first to third in other points. Since the description is substantially the same as the case of the invention, it is omitted here.

Also, the center area of the toe part of the head is made heavy by a weight arrangement structure in which the heavy weight arrangement near the heel of the head by the hosel part H located on the heel side is also arranged in the toe part. This is because the center of gravity of the head can be formed at the center portion in the front-rear direction by balancing the weight in the direction.
Alternatively, a high weight may be disposed in the center portion in the front-rear direction of the sole portion, and the head center portion may be oriented with respect to the ball.

  The present invention can be used for a golf club having an iron head.

FIG. 1 is a front view of a golf club according to the present invention. FIG. 2 is an enlarged view of the head portion. FIG. 3 is a back side rear view of the head portion. FIG. 4 is an exploded perspective view of the head main body and the weight body except for the face plate. FIG. 5 is a view corresponding to a cross section taken along line EE in FIG. FIG. 6 is a view corresponding to a cross section taken along line FF in FIG. FIG. 7 is a view corresponding to a cross section taken along the line of arrows GG in FIG. FIG. 8 is a view corresponding to a cross section taken along the line of arrows HH in FIG. FIG. 9 is an explanatory diagram of adjustment when joining the weight bodies. FIG. 10 is an explanatory view of adjustment at another stage when joining the weight bodies. FIG. 11 is an end view of another embodiment golf club according to the present invention.

Explanation of symbols

12, 12 'Head body 14, 14' Weight body F Flange portion OB Weight body recess OB 'Head body recess SH Joint plane SM Head body joint surface SM' Weight body joint surface TB Projecting portion TB 'Swelling portion TH Projection Side Side TH1 Projection Side Side Toe Side Side TH2 Projection Side Side Heel Side Side

Claims (6)

Considering excluding the face part, on the back side of the head body having an annular part having a region that becomes at least a part of each of the top part, the toe part, the sole part, and the heel part, and a shaft mounting part into which the shaft can be inserted, A golf club having an iron head formed by welding a weight body made of a member having a specific gravity greater than that of a head body,
The back surface of the head main body has a projecting portion in which a central region in the front-rear direction of the sole region (SL1) of the head main body bulges toward the back side with respect to an annular joining plane (SH) formed in a single plane. TB) is provided to overlap,
The protrusion has a toe side surface (TH1) and a heel side surface (TH2) of the protrusion side surface (TH) which is the back side of the head in a plan view shape, each having an acute angle with respect to the bonding plane. Is continuous,
The bonding surface (SM) of the head main body is formed by the side surface of the protruding portion and the bonding plane excluding the region of the protruding portion,
The projecting portion side surface has a bus, and the bus is oriented in the vertical direction, which is a direction connecting the sole portion and the top portion, and is parallel to the joining plane,
The weight body is annular, and a concave portion (OB) corresponding to the protruding portion is provided in a central region of the sole portion region, and weight members are provided on the toe side and the heel side as compared with the central region. It has a large number of body joint surfaces (SM ′) corresponding to the joint surfaces of the head body,
When the weight body is finely adjusted in the vertical direction with the weight body bonding surface and the head body bonding surface in contact with each other, there is no portion that becomes a hook for the fine adjustment movement, and the weight body bonding surface When the weight body is finely moved in the front-rear direction, which is the direction connecting the toe part and the heel part, with the joint surface of the head body in contact with the head body, A golf club having an iron head, characterized by not being present except for the protruding portion.   In the sole portion region of the weight body, a flange portion (F) projecting toward the face side is located above the weight joint surface and at a position that does not catch the fine adjustment movement in the vertical direction and the front-rear direction. A golf club having an iron head according to claim 1.   The golf club having an iron head according to claim 1 or 2, wherein the concave portion is formed with an appropriate gap in a state where the fitting with the protruding portion is loosened. Considering excluding the face part, on the back side of the head body having an annular part having a region that becomes at least a part of each of the top part, the toe part, the sole part, and the heel part, and a shaft mounting part into which the shaft can be inserted, A golf club having an iron head formed by welding a weight body made of a member having a specific gravity greater than that of a head body,
The back surface of the head main body is a recess (OB ′) in which the central region in the vertical direction of the toe portion region of the head main body is recessed to the face side with respect to the annular joining plane formed in one plane.
In the shape of the head in the end face view, the concave portion has a top side surface and a sole side surface of the concave surface that are continuous at an obtuse angle with respect to the joining plane,
The joint surface of the head body is formed by the concave surface and the joint plane excluding the concave region,
The concave surface has a generatrix, the generatrix is oriented in the front-rear direction, which is the direction connecting the heel portion and the toe portion, and is parallel to the joining plane,
The weight body is annular, and a bulging portion (TB ′) corresponding to the concave portion is provided in a central region in the toe portion region, and a weight member is provided in the central region as compared with the top side and the sole side. It has a heavy body joint surface corresponding to the joint surface of the head main body,
When the weight body is finely moved in the front-rear direction while the weight body bonding surface and the head body bonding surface are in contact with each other, there is no portion to be caught in the fine adjustment movement, and the weight body bonding surface When the weight body is finely adjusted in the up-down direction, which is the direction connecting the top portion and the sole portion, with the joint surface of the head main body abutting, the portion that becomes the catch of the fine adjustment movement is A golf club having an iron head, which is not present except for the bulging portion.   In the toe part region of the weight body, there is a flange part protruding toward the face side at a position on the heel side in the vicinity of the weight body joint surface that does not catch each fine adjustment movement in the vertical direction and the front-rear direction. A golf club having an iron head according to claim 4.   The golf club having an iron head according to claim 4 or 5, wherein the recess is formed with an appropriate gap in a state where the fitting with the bulging portion is loosened.

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