JPH07299164A - Iron club head for wedge shot - Google Patents

Abstract

PURPOSE:To provide a wedge club used for both playing on sand and approaching which enables a bunker shot, an explosion shot and an approach shot through the green other than bunkers. CONSTITUTION:Whole of sole part 8 being extended following a leading edge land part 5 is formed of an almost curved surface with an archery cross section in the direction of the rear end periphery part 7 where the width of the sole becomes maximal in such a manner as to be tapered by gouging it over the entire portion thereof 8 formed into such a curved surface as above while being linked to a bounce of a heel part, a central land of the sole part and a bounce of a toe part. A part of the rear part of a head body or the perimeter of the rear portion is formed in a cavity back with a recessed part leaving a circular part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a wedge shot,
In particular, the present invention relates to a wedge club head structure suitable for a bunker shot mainly used in a bunker and an approach shot in a through-the-green other than the bunker.

[0002]

2. Description of the Related Art In golf play, an approach can be made, as it is said from "score making is an approach" or "a scoring zone around the green".
Poorness has a big influence on the score, and we all know that approach shots are important.

As is well known, for a player, a ball in a bunker arranged in a golf course depends on the lie of the ball dropped on the sand, the type of the sand, and the dropping position.
In addition, it is necessary to shoot under all conditions such as the distance to the pin on the green or putting one cushion in front of the green without dropping it directly on the green, this is not limited to bunker, it is also applicable to shots from through the green It is common to say.

Normally, in a bunker shot, it should be judged that the ball on the sand is not directly hit by the impact, and the ball on the sand is sunk to some extent regardless of whether the lie is good or bad. Explosion shot that uses the action of hitting the ball and using the sand as a cushion to raise the ball.

That is, to raise the ball on the cushion, it is the same as hitting the cushion with the club head and using a cushion. Therefore, depending on the amount of sand taken, a home run that hits the ball directly to go over the target point, or a miss shot such as a shackle that can not be punched out by hitting the club head (sruther green from other than the bunker) It was a mistaken shot in which Duff hits the ball in front of the ball), causing the player to lose the score.

As shown in FIG. 8, the conventional sand wedge head has a heel portion (b) connected to the tip of the shaft (a) as one apex, and extends in a direction orthogonal to the swing direction, that is, in front of the player's body. A substantially triangular face (C) having two sides widening toward the front in the swing direction is formed so as to incline (loft) about 35 degrees with respect to the horizontal plane L. And, on the back side, from the leading edge round (d), there is formed a sole (e) that horizontally extends backward by a predetermined width in the swing direction, and is formed by inflating the sole width to increase the explosive force during use. is there.

Further, round and round rounds are formed in each club before and after the sole (e).

[0008]

As described above, if the sole (e) is thick and bulged, it also has weight, and the explosive force will certainly increase, but for a golfer who is weak on the other side,
It loses the resistance of the sand and causes a miss shot, which is a weak shot especially for a weak woman.

On the other hand, for a player with a certain level of high level, the rounds of the front and rear of the big sole and the width of the sole are obstacles to an accurate shot, and it may not be possible to release an accurate shot expected by oneself. .

In the past, in an attempt to improve the above-mentioned object, in a club head of a metal short iron, the shape of the flat plate striking surface just behind the scoring area, including the very vicinity of the sole edge, has been achieved as much as possible. Over a wide range,
A smooth and thin wall with a uniform thickness and a thicker rim around the outer edge, and a half or full swing is performed with a pitch shot to adjust the flight distance to the hole. (Sho 53-127038), part of the sole of the iron head is cut to reduce the area of the sole to reduce the resistance of the turf, or a through hole is formed in the back surface of the head from the surface of the sole, and the sand of the bunker makes the through hole. By removing it, duffing is prevented and swinging is facilitated (JP-A-59-174171), the material forming the hosel part and bridge part of the iron golf club head is reduced, and a weight equivalent to this is applied to the blade. It is made of Ti or its alloy so that it can contribute to the transfer of momentum to the golf ball by transferring the material (JP-A-63-216584). By providing a hardened layer made of Ti intermetallic compound in the sole face of the club head, to improve the wear resistance of the sole portion, whereby those with a suitable head structure Iron wedge clubs (JP-4-29
7283), and further by notching a part of the metal part on the back side of the sole part and substituting it with a non-metal having a low specific gravity such as fiber reinforced plastic, the weight of the head is distributed to the toe side and the heel side, Balanced toe-heel, wider head sweet area for stable shots and less head deflection on missed shots (Sho 63-158365), sand on wedge club sole In addition to providing a negative rake angle with respect to, and inclining the ridgeline of the edge of the sole in the swing direction with respect to the narrow groove in plan view, the resistance when the head is driven into the sand is reduced and the sand With a structure that facilitates easy removal from the head and facilitates control of the head orientation (actual fairness 1-
62866) is provided and disclosed.

In order to remedy the above-mentioned drawbacks, the present invention does not cause a home run even if it is used from a bunker or a non-bunker such as a rough or fairway with a bad lie, or a ball is hit directly without sand. On the contrary, even if you hit the front side of the ball with a dull feeling, you can overcome the resistance of the sand and roughs such as contralateral eyes, and you can use explosive shots and approach shots without crisping It is intended to provide an iron club head for wedge shots.

[0012]

In order to achieve the above object, the present invention relates to a wedge shot iron club head 1 having a required metal material as a base material, which extends to a base end portion 3 of a neck portion 2. Heel part vance 4 formed by
The leading edge land portion 5, the toe portion bance 6, and the sole maximum width rear end peripheral edge portion 7 form a sole portion 8 and all portions of the sole portion 8 continuously extended to the leading edge land portion 5. About the sole width, the maximum width of the sole is eliminated by forming a curved surface having an arcuate cross section in the direction of the rear end peripheral edge, and the heel portion vance 4 and the sole portion central land 9 are
The sole portion 8 connected to the toe portion vance 6 is formed on the substantially curved surface.

In order to solve the problem, the iron club head 1 has a cavity-back shape in which a recess 12 is provided in the back surface portion 10 of the head body or around the back surface, leaving an annular portion 11. Use it as a means.

[0014]

The use of the wedge shot iron club head according to the present invention will be described. When the iron club head is driven into the sand, the iron club head faces downward due to the slope effect of the face having a positive rake angle with respect to the sand. It receives the same force as a conventional sand wedge.

However, according to the iron club head for wedge shots according to the present invention, as shown in FIG. 5, the sole width of all the sole portions 8 continuously extending to the leading edge land portion 5 is reduced. Since the leading edge land portion 5 is formed over the entire curved surface and has an acute angle formed by cutting it into a curved shape with an arcuate cross section, and the sole end located at the rear end connected to this in the width direction. Due to the action of the largely rear end peripheral portion 7, the iron club head 1 can perform the action of raising the ball by using the sand as a cushion (explosure rosion shot) without deeply digging into the sand. That is, when the leading edge land portion 5 of the curved surface formed over the sole portion 8 first touches the sand and then the face further moves in the swing-out direction, the sole maximum width rear end peripheral portion 7 becomes thin. The sand taken is conveniently braked and acts as an explosive shot with the usual thin techniques.

What is different from the conventional thick wedge sand wedge shot is that it can be used in the same method without affecting the sand type such as softness, hardness, and sand coarseness due to the influence of rain. is there.

In addition, the lie of the ball in the bunker is a "complete fried egg" state where the ball is completely submerged in the fried egg or fried egg (crater state), and a slightly shallow crater like "fried egg". Even in the case where the leading edge land portion 5 is sharply cut according to the sand wedge according to the present invention, (in the case of a normal thick vance, the point where the club head is inserted is It is extremely easy to hit a ball by hitting an acute-angled edge as it is with a ball that is the center of the ball, although it requires a technique of hitting two soles of the club head backward about twice as much as a normal bunker shot.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An iron club head for wedge shot according to the present invention will be described below with reference to the embodiments shown in the drawings.

1 to 6 show an embodiment of the present invention, FIG. 7 shows another embodiment, and FIG. 8 shows a side view of a conventional sand wedge club for explaining the present invention. There is.

In the figure, the iron club head 1 is
A leading edge land portion 5, a toe portion bounce 6, a sole maximum width that extends in a direction substantially orthogonal to the swing direction with the heel portion bounce 4 formed by extending the base end portion 3 of the neck portion 2 as one apex. The sole portion 8 is integrally formed by each portion of the rear end peripheral portion 7. Then, the sole is continuously extended to the leading edge land portion 5 and is extinguished by forming a curved surface having an arcuate cross section in the direction of the rear end peripheral edge of the sole maximum width. Furthermore, the sole portion 8 is integrally formed by connecting the heel portion vance 4, the sole portion central land 9 and the toe portion vance 6 and eliminating them on a substantially curved surface.

In FIG. 7, the basic structure is the same as that of the first embodiment described above (FIGS. 1 to 6), but the difference from the first embodiment is that the back surface of the iron club head 1 is different. An example of a so-called cavity back shape is shown in which a concave portion 12 is formed in which a circular ring portion 11 is formed by leaving a part of the portion 10 or the periphery of the back surface portion 10 in a circular ring shape. ), The shape, and the depth of the recess 12 are
It is possible to change the design arbitrarily as needed.

Further, the most distinctive feature of the present invention from the conventional sand wedges and approach wedges is that the sole land having the entire sole width is the entire sole portion 8 continuously extended to the heel portion vance 4. As shown in FIG. 5 to FIG. 7, the heel width of the sole 8 is connected to the center land 9 of the sole and the toe 6 of the toe 6 to form the sole width. Is formed by eliminating the central portion of the sole portion 8 in a curved shape with an arcuate cross section and eliminating the entire sole portion 8.

Therefore, as shown in the figure, in the cross section of the sole portion 8, the leading edge land portion 5 and the sole maximum width rear end peripheral portion 7 of the sole width form an edge with an acute angle.

[0024]

According to the iron club head for wedge shots of the present invention, when the iron club head is driven into the sand, the iron club head has a slope effect of the face having a positive rake angle with respect to the sand. Receives a downward force. At this time, according to the present invention, the sole recess is formed over the entire width of the sole on the entire portion of the sole that is continuous with the leading edge land.

Therefore, due to the action of the leading edge land portion which is cut into a curved shape with an arcuate cross section and has an acute angle, and the rear edge portion of the sole width which is connected to the leading edge land portion in the width direction, the iron club head is You can use the sand as a cushion to raise the ball without going deep into the sand.

At this time, when the leading edge land portion of the sole concave portion formed over the entire sole portion first touches the sand, and when the face further moves in the swing-out direction, the rear edge of the sole width becomes , Exerts a convenient braking effect on the thin sand surface,
It is possible to make a shot that penetrates into a thin sand, which is a conventional high-level sand technology.

According to this method of use, good shots can be made not only from the lie in the bunker but also from the apron around the hard green and the rough through-the-green (deep rough and thin fairways of grass).

Further, the excellent feature of the present invention is that since the sole recess is formed by connecting to the entire sole portion, for example, the hardness, softness, and weight of all lie and sand against the ball in the bunker, Even for light sand, the action of the leading edge land portion having an acute angle provided in the sole concave portion and the rear edge provided at the trailing edge of the sole width makes it possible to strike the ball extremely easily.

[Brief description of drawings]

FIG. 1 is a front view of an iron club head for wedge shots according to the present invention.

FIG. 2 is a sectional view taken along the line AA shown in FIG.

FIG. 3 is a cross-sectional view taken along the line BB shown in FIG.

4 is a cross-sectional view taken along the line CC shown in FIG.

FIG. 5 is a side view showing a main part of the iron club head.

FIG. 6 is a perspective view seen from a rear portion for explaining a sole portion which is a main portion.

FIG. 7 is a rear perspective view showing another embodiment.

FIG. 8 is a side view of a conventional sand wedge.

[Explanation of symbols]

 1 Iron Club Head 2 Neck Part 3 Base End Part 4 Heel Part Vance 5 Leading Edge Land Part 6 Toe Part Vance 7 Sole Maximum Width Rear Edge Peripheral Part 8 Sole Part 9 Center Part Land 10 Back Part 11 Annular Part 12 Recess

Claims (2)

[Claims] 1. An iron club head for wedge shots, which is made of a required metal material as a base material, and has a heel vance, a leading edge land part, a toe vance, and a sole maximum which are formed by extending the base end part of the neck part. A sole portion is formed by the respective portions of the rear end peripheral portion, and the entire maximum width of the sole width of the sole portion that is continuously extended to the leading edge land portion is the maximum width of the sole width. An iron club head for wedge shots, characterized in that a substantially curved surface is formed by connecting the heel bounce, the sole center land, and the toe bounce. 2. The iron club head for wedge shots according to claim 1, wherein the iron club head has a cavity back shape in which a recess is provided in a part of the back surface of the head body or around the back surface to leave an annular portion. .