JP2009240619A - Iron golf club and its manufacturing method - Google Patents

Abstract

An iron-type golf club having a low center of gravity, a deep center of gravity, and a high weight member attachment strength is provided.
An iron type golf club according to the present invention includes a head body 8 having a neck portion 7A and a frame portion 7B to which a shaft is fixed, and a face portion disposed on the frame portion 7B of the head body 8. A weight member 10 having a heavier specific gravity than the head body is disposed at the rear of the head body 8. The weight member 10 includes an upper receiving portion 7e provided on the back side of the toe side and the heel side of the frame portion 7B of the head body, a rear receiving portion provided on the back surface of the frame portion 7B of the head body, and a frame portion 7B of the head body. And is welded to the head main body 8.
[Selection] Figure 3

Description

  The present invention relates to an iron type golf club, and more particularly to an iron type golf club characterized by a weight member of a head, and a method for manufacturing the same.

  Conventionally, in a head structure of an iron type golf club, it is known to adjust a head balance by attaching weight members having different specific gravities to a head body.

For example, Patent Document 1 discloses an iron head in which an annular weight member is attached to the back side of the head body. Patent Document 2 discloses an iron head in which a weight member is attached along the toe-heel direction on the sole side of the head body.
JP 2007-260316 A JP 2005-118157 A

  As described above, although it is possible to adjust the balance of the head by attaching a weight member to the head body, as disclosed in Patent Document 1, an annular weight is provided on the back side of the head body. When the member is attached, the position of the center of gravity becomes high, and the golf club is difficult to rise when hitting. Further, as disclosed in Patent Document 2, if a weight member is attached to the sole side of the head body, the center of gravity of the head can be lowered, but it becomes difficult to increase the depth of the center of gravity. It becomes difficult to produce a golf club that is likely to be blurred in the direction of the hit ball.

  Further, as disclosed in Patent Document 1, a method of attaching a weight member by applying one surface to the head body, or as disclosed in Patent Document 2, In the method in which a recess is formed in the sole region and the weight member is exposed and fitted in this portion to be attached, there is room for further improving the attachment strength of the weight member.

  The present invention has been made based on the above-described problems, and an object thereof is to provide an iron-type golf club having a low center of gravity, a deep center of gravity, and a high weight member attachment strength, and a manufacturing method thereof. To do.

  In order to achieve the above-described object, an iron-type golf club according to the present invention includes a head body having a neck portion and a frame portion to which a shaft is fixed, and a face portion disposed on the frame portion of the head body. A weight member having a heavier specific gravity than the head body is disposed at the rear of the head body, and the weight member is provided on an upper support provided on a toe side and a heel side rear surface of the head body frame. It is received by a head, a rear receiving portion provided on the back surface of the frame portion of the head main body, and an uneven portion provided on the sole side rear surface of the frame portion of the head main body, and welded to the head main body.

  The weight member in the iron-type golf club having the above configuration includes an upper receiving portion provided on the toe side of the frame portion and a back surface on the heel side, a rear receiving portion provided on the back surface of the frame portion, and a sole side of the frame portion Since the weight member is shaped to be received by the concavo-convex portion provided on the back surface and the weight member has a shape that does not exist on the top side, the center of gravity of the head body can be lowered. In addition, it is shaped to be received by the upper receiving part provided on the toe side of the frame part and the rear side of the heel side, and the rear receiving part, and the weight member is present on the toe side and heel side of the rear part of the frame part. Therefore, the depth of the center of gravity of the head main body can be increased, and the moment of inertia can be increased. For this reason, it is possible to stabilize the hitting direction so that the ball is easily raised, and it is possible to obtain an iron type golf club that is easy to hit.

  The weight member has three directions: an upper receiving portion provided on the toe side and the heel side of the frame portion, a rear receiving portion provided on the back surface of the frame portion, and an uneven portion provided on the sole side rear surface of the frame portion. Since it is welded in the received state, the attachment strength is strong and the attachment accuracy is improved, so that a golf club with an excellent weight balance can be obtained.

  In order to achieve the above-described object, a method of manufacturing an iron type golf club according to the present invention includes a head main body having a neck portion and a frame portion to which a shaft is fixed, and a frame portion of the head main body. And when the weight member having a heavier specific gravity than the head main body is welded to the rear portion of the head main body, the weight member is provided on the toe side and the heel side rear surface of the head main body. Against the upper receiving part toward the top side, against the rear receiving part provided on the back side of the frame part of the head body toward the face part side, on the sole side rear side of the frame part of the head body It is applied to the provided uneven portion on the toe direction side and the heel direction side, and the weight member is welded to the frame portion of the head main body in this applied state.

  In the method for manufacturing an iron-type golf club having the above-described configuration, the weight member includes an upper receiving portion provided on the toe side and heel side of the frame portion, a rear receiving portion provided on the back surface of the frame portion, and a sole of the frame portion. Since welding is performed in a state where the projections and depressions provided on the side rear surface are received in the three directions, the weight strength of the weight member is strong, and a golf club with excellent weight balance can be obtained.

  According to the present invention, an iron-type golf club having a low center of gravity, a deep center of gravity, and a high weight member attachment strength, and a manufacturing method thereof can be obtained.

Hereinafter, an embodiment of an iron-type golf club according to the present invention will be described with reference to FIGS.
In these drawings, FIG. 1 is a front view showing an embodiment of an iron type golf club according to the present invention, FIG. 2 is a front view of a head portion, FIG. 3 is a rear view of the head portion, and FIG. FIG. 5 is a side view of the head portion viewed from the toe side, FIG. 6 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. FIG. 8 is a cross-sectional view of the face plate, and FIG. 9 is a view showing a state in which the bent portion of the face plate is attached to the head main body.

  The golf club 1 according to this embodiment is configured by fixing a head (iron head) 7 to the tip of a shaft 5, and the shaft 5 and the head 7 hold the golf club 1 with respect to a reference horizontal plane P. At this time, the distance between the axis S of the shaft 5 and the reference horizontal plane P is set to a predetermined lie angle α.

  The head 7 includes a head main body 8 having a neck portion 7A and a frame portion 7B to which the shaft 5 is fixed, and a face portion 9 fixed to the frame portion 7B of the head main body 8. The frame portion 7B is formed in an annular shape having a top portion 7a, a sole portion 7b, a toe portion 7c, and a heel portion 7d, using a metal material such as a titanium alloy, stainless steel, or carbon steel.

  As will be described later, the annularly formed frame portion 7B is disposed on the rear side of the frame portion 7B across the sole portion 7b and rises to a substantially intermediate position between the toe portion 7c and the heel portion 7d. Thus formed weight member 10 is attached by welding. In addition, a plate-like member (face plate 9A) constituting the face portion 9 is fixed to the front side of the frame portion 7B so as to close the annular opening. It has a so-called cavity structure in which the rear side of 7B is opened.

  The weight member 10 is made of a material having a specific gravity higher than that of the frame portion 7B of the head body, for example, tungsten, tungsten alloy, lead, copper, and the like, and on the back side (rear side) of the frame portion 7B, the sole side It is attached by welding. In this case, the weight member 10 further extends to a predetermined height position (substantially central height position in the present embodiment) not only on the sole side region but also on the toe side and heel side of the frame portion 7B. The end face 10a is received and welded to an upper receiving part 7e provided on the back surface of the frame part 7B described in detail below.

  Further, when the weight member 10 of the present embodiment is welded to the frame portion 7B, the lower surface 10b on the sole side faces the lower surface 7b ′ of the sole portion 7b of the frame portion 7B as shown in FIGS. It is formed to be in a single shape. Further, as shown in FIGS. 6 and 7, the weight member 10 includes a stepped portion 10c that is higher than the inner surface 7f on the sole side of the frame portion 7B, and the step between the stepped portion 10c and the inner surface 7f. The boundary portion thus formed is fixed to the frame portion 7B by welding from the face side (stepped portion side) or by other bonding or soldering.

  In this case, the front wall of the stepped portion 10c is preferably configured with a curved surface having a radius of curvature of 1.0 mm or more. With this configuration, the vibration unique to the weight member can be prevented, the hitting sound can be improved, and the internal cleaning and the like can be easily maintained. Further, as shown in FIG. 7, the step with the inner surface 7f on the sole side is formed over the entire length in the toe-heel direction, but it is not necessarily formed over the entire length.

  Further, as will be described later, the weight member 10 of the present embodiment is formed with a recess 10d toward the back side at the front portion on the face side so as to be fitted to the uneven portion provided on the frame portion 7B. The height h of the region of the recess 10d is formed to be lower than the heights of the toe side and heel side portions. That is, as shown in FIG. 3, the height h of the portion where the recess 10d is formed is formed lower than the height on the toe side and the heel side, so that the toe side and the heel side serve as weight members. The weight is distributed so as to be heavier than the central region. In this case, the height of the toe side and the heel side is formed so that the weights on the toe side and the heel side are relatively heavier than the central region when the weight member 10 is considered as a single body. The ratio between the specific height and the height h of the portion where the recess 10d is formed can be appropriately changed.

  On the other hand, an upper receiving portion 7e to which the upper end surface 10a formed on the weight member 10 is welded is formed on the toe side and the heel side rear surface of the frame portion 7B. In this case, as shown in FIG. 3, the upper receiving portion 7e is formed so that the weight member 10 is received in the direction of the top portion (arrow D1 direction) when the frame portion 7B is viewed from the rear side. In this embodiment, it is formed so as to be substantially parallel to the horizontal line at the substantially central portion of the back surface on the toe side and the heel side. Further, as shown by the symbol P in FIGS. 3 and 7, the upper receiving portion 7e and the weight member 10 wrap around from the back side of the frame portion 7B to the inside of the frame portion 7B and face the face portion side. Welding is performed up to a region to be performed (region extending to the inside of the frame portion 7B).

  Further, an uneven portion 7g to which the weight member 10 is welded is formed on the back surface on the sole side of the frame portion 7B so as to protrude toward the back side. In this case, as shown in FIG. 4, the uneven portion 7g is formed so that the weight member 10 to be attached is received in the toe-heel direction (arrow D2 direction) when the frame portion 7B is viewed from below. In the present embodiment, the center region of the sole portion is formed in an uneven shape that protrudes rearward. For this reason, the recess 10d formed in the weight member 10 is adapted to fit with the convex portion of the concave and convex portion 7g.

  Further, a rear receiving portion 7h to which the weight member 10 is welded is formed on the back surface of the frame portion 7B. In this case, as shown in FIG. 5, in the rear receiving portion 7h, the weight member 10 is received in a direction (arrow D3 direction) perpendicular to the hitting surface of the face portion 9 when the frame portion 7B is viewed from the side. In this embodiment, the weight member 10 is received by a substantially flat surface. For this reason, as shown in FIG. 4, the uneven portion 7g formed on the back surface on the sole side also receives the weight member 10 in the direction of the arrow D3.

  Thereby, the above-described weight member 10 is applied toward the top side (in the direction of arrow D1) with respect to the upper receiving portion 7e of the frame portion 7B, and in the toe direction with respect to the uneven portion 7g provided on the sole side rear surface of the frame portion. Applied on the side and the heel direction side (arrow D2 direction), and further toward the face side (arrow D3 direction) with respect to the rear surface of the rear receiving portion 7h and the uneven portion 7g provided on the back surface of the frame portion The head portion is manufactured by attaching to the frame portion 7B by welding in the applied state in these three directions.

  A plate-like face plate 9A constituting the face portion is fixed to the front side of the frame portion 7B. The face plate 9A has a number of score lines 9a formed on the surface, and is made of a metal material such as titanium alloy, stainless steel, carbon steel, maraging steel, and the like.

  The plate-like face plate 9A is fixed so that its periphery is brought into contact with the front region of the frame portion 7B. In this embodiment, as shown in FIG. A bent portion 9b that is bent rearward is formed at the end portion, and the front end surface 9c of the bent portion 9b is fixed to the front surface of the frame portion 7B while being abutted, and at least includes a region on the top side. The other areas are fixed in a bearing state.

  Specifically, the angle between the bent portion 9b and the face surface f (the bending angle θ between the bent line Q on the upper side of the bent portion 9b and the face surface f) is 90 ° or more. As shown in FIG. 9, the front end surface 9 c of the bent portion 9 b is fixed so as to abut on a step portion 7 k formed below the front end portion of the frame portion 7 B of the head body 8. In this way, a bent portion is formed at the end of the face plate on the sole side and fixed so that the front end surface is brought into contact, so that the bent portion 9b is in a cantilever state. Can be easily bent. In other words, the resilience of the face portion is expanded toward the sole side, thereby improving the flight distance.

  The bending angle θ may be set smaller than 90 °. Further, the length of the bent portion 9b is not particularly limited, and may be longer than the configuration shown in the drawing.

  In the configuration described above, the face plate 9A preferably has a specific gravity smaller (lighter) than that of the head body 8 and the weight member 10. With this configuration, the center of gravity can be lowered and the depth of the center of gravity can be increased.

  As shown in FIG. 9, a protrusion 7m is formed above the front end of the frame 7B, adjacent to the step 7k and protruding toward the back surface of the face plate. The projecting portion 7m has a predetermined gap G (within 2.0 mm, preferably about 1.5 to 0.3 mm) between the projecting portion 7m and the back surface of the face plate 9A without the tip surface of the projecting portion 7a contacting the back surface of the face plate 9A. The gap is formed.

  By forming the protrusion 7m in this way and forming the gap G with the back surface of the face plate 9A, the face deformation range at the time of hitting can be expanded, and the generation of abnormal noise can be prevented. It becomes possible. The gap between the end surface of the protrusion 7m and the back surface of the face plate 9A is filled with a member softer than the material of the head main body and the face plate, for example, a synthetic resin such as an adhesive, solder, or the like. Is preferred. By filling such a soft member, it is possible to prevent chatter noise and abnormal noise due to vibration of the face at the time of hitting, and to prevent foreign matters such as sand from entering. it can.

  Further, the face plate 9A described above is preferably formed so that the thickness on the sole side is thinner than the sweet spot region so that the sole side is easily bent. In this embodiment, a recess 9d is formed along the toe-heel direction on the back surface of the face plate above the bent portion 9b so as to obtain such flexibility.

  Furthermore, in the present embodiment, the concave groove 9e is formed in a region other than the bent portion 9b, specifically, a region along the portion where the surface is fixed to the frame portion 7B. The improvement of flexibility is aimed at. The concave groove 9e can be formed continuously, for example, from the top region to the toe portion region, and is formed so as to overlap with the concave portion 9d on the toe side serving as the sole region. Yes.

  Since these recesses 9d and grooves 9e improve the overall flexibility of the face portion, they may be in contact with each other or may be continuously formed, and may be continuously formed on the heel side. May be formed. Further, the width and depth can be appropriately changed according to the face material, and the formation method may be formed not discontinuously but discontinuously.

  In the iron-type golf club configured as described above, since the weight member 10 has a shape that does not exist on the top side of the frame portion 7B, the center of gravity of the head body 8 can be lowered, and the ball Can be easily hit with a high trajectory. Further, since the weight member 10 has a shape extending to the height of the center portion on the toe side and the heel side on the back surface of the frame portion 7B, it becomes possible to increase the depth of the center of gravity of the head body 8. Thus, it is possible to provide a golf club that is easy to hit and can stabilize the hitting direction.

  Further, the weight member 10 is provided on the upper receiving part 7e provided on the back side of the toe side and the heel side of the frame part 7B, the rear receiving part 7h provided on the back side of the frame part 7B, and the sole side rear face of the frame part 7B. The golf club has a shape that can be received by the provided uneven portion 7g, and is welded in a state of being received in three directions (D1 to D3), so that the golf club has strong attachment strength and excellent weight distribution accuracy. Can be obtained.

  The weight member 10 includes a stepped portion 10c that is higher than the inner surface of the frame portion 7B on the sole side, and is welded to the frame portion 7B from the stepped portion side, so that it is easily welded along the stepped portion. In addition to being able to work, it can be firmly fixed to the frame portion 7B, and a golf club having excellent durability can be obtained. Further, by providing the stepped portion 10c, it is possible to prevent the actual welded portion from being seen from the rear side, and the golf club has an excellent appearance despite welding at a position where polishing is difficult. be able to. Furthermore, by providing the stepped portion 10c and fixing the front wall of the stepped portion and the rear surface of the frame portion by welding or the like, it is possible to prevent the generation of abnormal noise due to vibration during hitting. Moreover, since both are fixed by welding or the like, the generation of a gap can be prevented, and the entry of foreign matters such as sand can be prevented.

  Moreover, the uneven part 7g provided in the frame part 7B has a shape in which the central region of the sole part protrudes rearward, and the weight member 10 is fitted to the uneven part 7g according to this shape. A recess 10d is formed in the front part on the face side, and further, a part that fits with the uneven part 7g is formed lower than the height on the toe side and the heel side. As a result, the weight of the weight member 10 can be efficiently tow-heel balanced, and the width of the sole portion of the frame portion 7B can be increased in the front-rear direction, preventing deformation of the frame portion 7B when hitting a ball. It can be a firm and sharp feel. In addition, by improving the toe-heel balance, the directionality of the hit ball can be stabilized.

  Further, the upper receiving part 7e of the frame part 7B and the weight member 10 are welded from the back side of the frame part 7B to the inside of the frame part 7B, as indicated by reference numeral P in FIGS. Therefore, regardless of the shape of the frame portion 7B, the weight member 10 can be more firmly fixed, and even when vibrations are repeatedly applied, the occurrence of cracks can be prevented and the durability is excellent. It becomes possible to make a golf club.

  In the configuration of the present embodiment, the combination of the arrangement of the weight member 10 and the configuration of the face plate 9A described above can improve the flight distance and stabilize the direction more efficiently. That is, the configuration of the face plate 9A described above makes it possible to improve the resilience performance over a wide range including the low position of the face (sole side), and the weight member 10 is raised in the toe / heel direction to increase the center. By lowering the portion, the center of gravity and the moment of inertia are increased, thereby suppressing the rotation of the head at the time of hitting the ball and making a golf club with improved flight distance and excellent directional stability.

  As mentioned above, although embodiment of this invention was described, this invention receives the weight member 10 in three directions (D1-D3), ie, the attachment aspect between the weight member 10 and the frame part 7B, and a frame part. The head body, the weight member, and the like are not limited to the above-described embodiment and can be variously modified.

  For example, the shape (weight distribution mode) of the weight member 10 can be appropriately modified. Further, the welding surfaces of the upper receiving part 7e, the rear receiving part 7h, the concavo-convex part 7g of the frame part 7B, and the weight member 10 may be abutting each other, or may be fitted by forming a groove or the like. It may be a match.

  Further, in the above-described embodiment, the face plate 9A constituting the face portion is formed with the recess 9d and the groove 9e so as to improve the flexibility, but such a recess 9d and the groove 9e are formed. The structure which fastens to frame part 7B without doing may be sufficient.

1 is a front view showing an embodiment of an iron-type golf club according to the present invention. Front view of the head portion (view from the face side). The rear view of a head part (figure seen from the back side). The back view of a head part (figure seen from the sole side). Side view of the head part (view from the toe side). Sectional drawing along the AA line of FIG. The front view which shows the state which has not attached the face part to the head part. Sectional drawing of a face plate. The figure which shows the attachment state with respect to the head main body of the bending part of a faceplate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Golf club 5 Shaft 7 Head 7A Neck part 7B Frame part 7e Upper receiving part 7g Uneven part 7h Rear receiving part 8 Head main body 9 Face part 10 Weight member

Claims (7)

A head body having a neck portion and a frame portion to which the shaft is fixed, and a face portion disposed on the frame portion of the head body, and a weight member having a higher specific gravity than the head body at the rear portion of the head body An iron-type golf club arranged,
An upper receiving portion provided on the back of the toe side and the heel side of the frame portion of the head main body, a rear receiving portion provided on the back surface of the frame portion of the head main body, and a frame portion of the head main body. An iron-type golf club that is received by a concavo-convex portion provided on the back side of the sole and welded to a head body.   2. The iron type according to claim 1, wherein the weight member includes a stepped portion higher than an inner surface on the sole side of the frame portion, and is fixed to the frame portion from the stepped portion side. Golf club. The concavo-convex portion provided in the frame portion has a shape in which the central region of the sole portion protrudes backward,
The weight member is formed with a depression in the front part on the face side so as to be fitted into the uneven part, and a part to be fitted with the uneven part is formed lower than the height on the toe side and the heel side. The iron-type golf club according to claim 1, wherein the golf club is an iron-type golf club.   The upper receiving part and the weight member of the frame part are welded from the back side of the frame part to the inside of the frame part, according to any one of claims 1 to 3. Iron type golf club. The face portion disposed on the frame portion of the head body is constituted by a plate-like member,
The plate-like member includes a bent portion that is bent rearward at an end on the sole side,
5. The fixing device according to claim 1, wherein the front end surface of the bent portion is fixed to the frame portion in an abutting state, and the top side region is fixed in a surface receiving state. 6. Iron type golf club. A head body having a neck portion and a frame portion to which the shaft is fixed, and a face portion disposed on the frame portion of the head body, and a weight member having a higher specific gravity than the head body at the rear portion of the head body A method for manufacturing an iron-type golf club to be welded,
The weight member is applied toward the top side with respect to the upper receiving part provided on the toe side and heel side of the frame part of the head body, and the rear receiving part provided on the back surface of the frame part of the head body. Against the face part side, against the uneven part provided on the sole side back of the frame part of the head body on the toe direction side and the heel direction side,
A method of manufacturing an iron-type golf club, wherein the weight member is welded to a frame portion of a head body in this applied state.   The method of manufacturing an iron type golf club according to claim 6, wherein the upper receiving part of the frame part and the weight member are welded from the back side of the frame part to the inside of the frame part.

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