JP2006247169A - Golf club set and grip for golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club set which enables the selection of a golf club to match the way of holding the grip for each golfer or the track of golf balls and a grip for the golf club used for it. <P>SOLUTION: As for all golf clubs within a regulation range of 20-41° of loft out of an iron golf club set 10, in a sectional plane generated by sectioning the grip 26 and a golf club shaft 22, a straight line is determined passing through the center axis of the golf club shaft 22 from a position on the circumference of a golf club shaft having the backline 28 of the grip 26 set on it and a projection line is also determined by placing the golf club on a horizontal plane following a lie to make a horizontal line parallel on the face plane of the golf club head 24, which is then projected onto the sectional plane. Thus, the grip 26 is mounted in such a manner that the direction of the straight line is turned by 3-50° in absolute values with respect to the direction of the projection line. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a golf club set having a plurality of golf clubs in which a golf club head is attached to the front end portion of the golf club shaft and grips are attached to the rear end portion of the golf club shaft, and golf clubs used for these golf clubs Regarding grips.

For golfers, golf clubs that have been launched are not desired to bend, and golf clubs that allow a great flight distance are desired.
In particular, since an iron golf club is used as a golf club set including a plurality of golf clubs having different loft angles, it is strongly desired to purchase a golf club set suitable for an individual golfer.

  For example, Patent Document 1 below proposes a golf club set in which a long iron and a middle iron have a high launch angle and the ball is likely to rise, and a short iron has a lot of spin and the ball is likely to stop. Specifically, in a hollow iron type golf club having a hollow portion surrounded by a face portion, a back portion, and a sole portion, at least on the toe side, the thickness of the face portion increases toward the bottom. It has been disclosed to use a golf club head with the features and use such a golf club as a set.

However, in this golf club set, it is impossible to determine whether or not the golf club is suitable for each individual golfer without actually making a test.
Further, even if such a golf club is a golf club suitable for the golfer's own golf swing and the initial velocity of the launched golf ball is increased, the golfer's grip method differs depending on the gripping method. It often does not match well with the grip of the club and often exhibits a bendable muscle.

Japanese Patent Laid-Open No. 2003-265652

  In order to solve the above problems, the present invention provides a golf club set and a golf club set capable of selecting a golf club that matches a gripping method of each golfer or a golf ball ball when a golfer purchases a golf club. An object is to provide a grip for a golf club to be used.

  The present invention has a plurality of golf clubs including a golf club having a golf club head mounted on the front end portion of the golf club shaft and a grip mounted on the rear end portion of the golf club shaft. A set of golf clubs having different loft angles for each count, when these golf clubs are placed on a horizontal plane according to the lie angle, and when the grip and the golf club shaft are cut perpendicularly to the central axis of the golf club shaft When a straight line passing through the central axis of the golf club shaft from a circumferential position around the golf club shaft where the back line of the grip is provided and a horizontal line on the face surface of the golf club head are projected on the cutting plane in the cutting plane When the projection line is determined, the direction of the straight line has a loft angle of 20 to 41 degrees. In all golf clubs in the constant range, to provide a golf club set, characterized in that rotating the absolute value from 3 to 50 degrees relative to the orientation of the projection line.

  The present invention also includes a plurality of golf clubs including a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. A golf club set in which the loft angle of the club is different for each count, and a mark written on the grip on a cutting plane when the grip and the golf club shaft are cut perpendicularly to a central axis of the golf club shaft A straight line passing through the central axis of the golf club shaft from a circumferential position around the golf club shaft at the center of the display portion to represent, and a horizontal line on the face surface of the golf club head by placing the golf club on the horizontal plane according to the lie angle When the projection line when projected onto the cutting plane is determined, the direction of the straight line is a loft angle of 20 to In all golf clubs in a time of the specified range, to provide a golf club set, characterized in that rotating the absolute value from 3 to 50 degrees relative to the orientation of the projection line.

The present invention also includes a plurality of golf clubs including a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. A golf club set in which the loft angle of the club is different for each count, and a mark written on the grip on a cutting plane when the grip and the golf club shaft are cut perpendicularly to a central axis of the golf club shaft A straight line passing through the central axis of the golf club shaft from a circumferential position around the golf club shaft at the center of the display portion to represent, and a horizontal line on the face surface of the golf club head by placing the golf club on the horizontal plane according to the lie angle When the projection line when projected onto the cutting plane is determined, the direction of the straight line is a loft angle of 20 to In all golf clubs in a time of the specified range, to provide a golf club set, characterized in that rotating the absolute value from 3 to 50 degrees relative to the orientation of the projection line.

  Furthermore, the present invention includes a plurality of golf clubs including a golf club having a golf club head mounted on the front end portion of the golf club shaft and a grip mounted on the rear end portion of the golf club shaft. A golf club set in which the loft angle of the club differs for each count, and the back line of the grip is provided in a cutting plane when the grip and the golf club shaft are cut perpendicularly to a central axis of the golf club shaft. A straight line passing through the central axis of the golf club shaft from a circumferential position around the golf club shaft and a golf club placed on a horizontal plane according to the lie angle, and a horizontal line on the face surface of the golf club head is projected onto the cutting plane When the projection line is determined, the direction of the straight line has a loft angle of 13 to 24 degrees. In all golf clubs in the constant range, to provide a golf club set, characterized in that rotating the absolute value from 3 to 50 degrees relative to the orientation of the projection line.

  The present invention also includes a plurality of golf clubs including a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. A golf club set in which the loft angle of the club is different for each count, and a mark written on the grip on a cutting plane when the grip and the golf club shaft are cut perpendicularly to a central axis of the golf club shaft A straight line passing through the central axis of the golf club shaft from a circumferential position around the golf club shaft at the center of the display portion to represent, and a horizontal line on the face surface of the golf club head by placing the golf club on the horizontal plane according to the lie angle When the projection line when projected onto the cutting plane is determined, the direction of the straight line is a loft angle of 13 to In all golf clubs in 4 degrees specified range, to provide a golf club set, characterized in that rotating the absolute value from 3 to 50 degrees relative to the orientation of the projection line.

  Here, the horizontal line on the face surface of the golf club head refers to a line on the face surface parallel to the reference surface (horizontal plane) when the golf club is in a normal address position (installed according to the lie angle). This horizontal line is generally substituted with a score line. The score line is set to indicate the reference of the face surface. If the score line is not linear, for example, a line that is parallel to the reference surface is added to the face surface as a horizontal line on the face surface when the score line is installed at a normal address position.

Here, the angle variation is preferably 10 degrees or less in a golf club having a loft angle within the specified range.
Further, for all golf clubs in the specified range, the loft angle is represented by a continuous natural number X starting from 1 in order from the smallest count, the angle is represented by Y, and the angle Y with respect to the natural number X is a regression line. When regressing, the regression line preferably has an inclination of −1 or less.

  Furthermore, the present invention is a cylindrical golf club grip attached to the end of the golf club shaft, the display portion displaying an identification mark on the cylindrical surface, and along the longitudinal direction of the golf club shaft. A back line, and the back line is provided at a cylindrical circumferential position 130 to 177 degrees apart in absolute value with respect to the position of the display unit. Provide a grip.

  In addition, the present invention is a cylindrical golf club grip attached to the end of a golf club shaft, the display portion displaying an identification mark on the cylindrical surface, and along the longitudinal direction of the golf club shaft. A back line, and the back line is provided at a cylindrical circumferential position separated by 3 to 50 degrees in absolute value with respect to the position of the display unit. Provide a grip.

In the present invention, the so-called grip angle is an absolute value of 3 in all golf clubs having a loft angle in a specified range of 20 to 41 degrees or in all golf clubs having a loft angle in a specified range of 13 to 24 degrees. Since the grip is mounted at a position rotated about 50 degrees clockwise or counterclockwise, a golf club that can respond to more diversified demands such as adjusting the ball muscles of a golfer with a tendency to slice or a golfer with a tendency to hook A set can be provided.

  Hereinafter, a golf club set and a golf club grip according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIG. 1 is a schematic diagram showing an example of a golf club set according to an embodiment of the present invention.
The golf club set 10 includes irons (A3 to AS) 10 for each number of irons from a 3 iron (A3) to a 9 iron (A9), a pitching wedge (AP), an approach wedge (AA), and a sand wedge (AS). Consists of books. Each iron has a golf club head 14 at one end and a grip 16 at the other end. The golf club head 14 is connected to the golf club shaft 12 via a socket 19 on a hosel protruding upward on the heel side.

  Here, the count is a loft angle represented by numbers (natural numbers), letters or symbols assigned to each golf club so that golf clubs having different loft angles can be arranged in the order of the loft angles. The loft angle of each count is appropriately set by those skilled in the art at a constant or substantially constant interval. Also, the large count means a count with a large loft angle.

The loft angles of these irons A3 to AS are, for example, A3 21 °, A4 24 °, A5 27 °, A6 30 °, A7 34 °, A8 38 °, A9 42 °, AP The loft angle increases as the count increases to 47 °, AA is 52 °, and AS is 57 °. Here, the counts having a loft angle of 20 ° to 41 ° are six counts A3 to A8.
In addition, the loft angles of the irons A3 to AS increase with a step size of 3 ° from A3 to A6, increase with a step size of 4 ° from A7 to A9, and with a step size of 5 ° from AP to AS. The step size of the loft angle of the irons A3 to AS is not limited to this, but may be a constant step size such as 3 ° or 4 °.
Further, the length from the end of the grip 16 to the lower end of the golf club head 14 (club length) gradually decreases as the count increases. That is, the golf club shaft 12 is longer in the smaller count.

  The loft angle of each count in such a golf club set 10 is an angle formed by the center axis CL of the golf club shaft and the face surface 15 of the golf club, as shown for the iron A6 in FIG. It is measured by a loft angle measuring device 60 as shown in FIG. FIG. 3 shows an example in which the iron A6 is attached to the loft angle measuring device 60, and FIG. 4 shows an enlarged view of the periphery of the golf club head 14 in FIG.

  The measurement of the loft angle is performed by the lie angle adjusting unit 63 so that the iron A6 is installed in accordance with the lie angle with respect to the reference surface 62 in a state where the golf club (iron A6) is attached to the loft angle measuring device 60. After the adjustment, the golf club (iron A6) attached to the loft angle measuring device 60 has the face portion 15 in close contact with the tip portion 66a of the face angle adjuster 66 so that the sole portion is in contact with the reference surface 62. In other words, the golf club (iron A6) is fixed by the chuck portion 68 so that the face angle becomes 0 °.

Here, the installation according to the lie angle means that the score line provided on the face surface 15 is installed so as to be parallel to the tip portion 66 a of the face angle adjustment jig 66. In addition, when it is difficult to discriminate by the score line because the score line is not a straight line, as shown in FIG. 8A described later, the sole portion is between the toe side (Toe) and the heel side (Heel) of the sole portion. When it is rounded in a convex shape, it means that the gap formed between the reference surface 62 and the sole portion is set to be substantially equal on the toe side and the heel side.
Further, when the convex portion of the sole portion is unclear and the score line is not linear and the parallelism with the reference surface 62 cannot be determined, the lie angle is calculated as 100-golf club length (inch). It is set and installed according to the lie angle. For example, in the case of a golf club length of 36 inches, the lie angle is set to 64 degrees (= 100−36). The golf club length is the length from the contact point between the sole surface of the golf club head and the back of the neck portion to the grip end (not including the roundness of the cap). For example, a club manufactured by Kamoshita Seikosho Co., Ltd.・ Using a measuring instrument such as Major II, it is measured by the traditional standard measurement method which is the standard of the Japan Golf Equipment Association. Further, when the score line is not linear, the fact that the center axis CL of the golf club shaft and the leading edge 14a are parallel to each other indicates a state in which the face angle is 0 degree, and this is substituted.

  Here, the club length is measured by a measuring method defined by the Japan Golf Equipment Association. An example of the measuring device is Club Major II manufactured by Kamoshita Seikosho Co., Ltd. That is, the distance between the end on the heel side and the grip end is the club length.

Thereafter, as shown in FIGS. 4A and 4B, the loft angle is measured using a protractor 70 erected perpendicularly to the reference surface 62 of the face surface 15 of the golf club head 14. When the face surface 15 is a flat surface (see FIG. 4A), the loft angle is obtained by the above measurement. When the face surface 15 is rounded in a convex shape, the measurement is performed by bringing the measurement surface of the protractor 70 into contact with the midpoint M of the face surface 15 as shown in FIG.
As described above, the loft angle can be measured by inserting a shaft pin into a single golf club head as well as by using a golf club. The numerical value of the loft angle obtained by measuring the golf club head alone is substantially the same as the loft angle obtained by measuring with the above-described golf club.

  Such a loft angle measuring device may be a known one that is commercially available, for example, Takahashi ball head measuring table manufactured by Shoho Co., Ltd., golf club angle measuring device manufactured by Golf Garage, Golf Smith A measuring instrument such as a company-made golf club gauge is exemplified. Such a measuring device may be any known one, and is not particularly limited in the present invention.

  The golf club set 10 of the present embodiment is a golf club set including 10 irons. The golf club set of the present invention includes not only an iron golf club set but also a wood golf club set and a wood golf club. A golf club set that removes the boundary between the set and the iron golf club set, a golf club set that only corresponds to a long iron, and an intermediate performance of a wood golf club and an iron golf club. It is difficult to include a golf club set including a so-called utility golf club, which includes a plurality of golf clubs having different loft angles. In this case, a plurality of golf clubs having a loft angle of 13 ° to 24 ° is preferable.

  FIG. 5A is a perspective view of an iron golf club 20 that is an example of the A6 count among the iron golf clubs shown in FIG. The iron golf club 20 includes a golf club shaft 22, a golf club head 24 attached to the front end portion of the golf club shaft 22, and a grip 26 attached to the rear end portion of the golf club shaft 22.

FIG. 5B is a cross-sectional view taken along the line XX ′ shown in FIG. A grip 26 is provided so as to surround the golf club shaft 22. A part of the outer periphery of the grip 26 is provided with a partially protruding protrusion (in FIG. 5B, exaggerated). Is written). The protrusions are provided at the same circumferential position in the longitudinal direction of the golf club shaft 22 to form a back line 28.
In the grip 26 before being attached to the golf club shaft 22, as shown in FIG. 5C, a part of the inner peripheral surface of the cylindrical grip 26 forms a flat portion 20. By mounting, the back line 18 is formed in a convex shape.
The grip 26 is mainly made of a flexible material such as rubber.

FIG. 6 is a diagram illustrating an example of the details of the grip 26.
In FIG. 6, a front display portion 32 is provided below the surface of the grip 26 and a logo mark “ABCD” is displayed. On the other hand, a rear display unit 34 is provided at a position opposite to the front display unit 32 on the upper surface of the grip 26, and a logo mark “ABCD” is displayed. The side where the logo mark “ABCD” is provided on the lower side of the grip 16 is the front side, and the central portion of the front display unit 32 is the 0 ° circumferential position. The side where the logo mark “ABCD” is provided on the upper side of the grip 16 is the back surface, and the central portion of the rear display portion is the 180 ° circumferential position. At this time, the flat portion 20 is located on the left side in FIG. 6 from the 180 ° circumferential position.

The front display portion 32 is a display portion that is visually identifiable on the front portion of the grip 26. The marks written on the front display unit 32 are not particularly limited as long as they can be identified such as dots, lines, characters, symbols, and the like. Generally, when the front display portion 32 is viewed from the front of the golf club 20, that is, when the golf club 20 is viewed from an extension line from the plug portion of the grip shaft of the grip 26, the grip shaft and the central portion of the front display portion 32 are displayed. The grip 26 is attached so that the direction of the tied line and the direction of the score line on the golf club face surface are parallel to each other.
The front display part 32 is preferably provided at two or more positions in the grip 26 in the longitudinal direction. By providing two or more locations, the grip 26 can be mounted so that each front display portion 32 of the grip 26 is in a desired position. In addition, it is possible to detect the twist that tends to occur when the grip 26 made mainly of a flexible material such as rubber is mounted and to eliminate it if necessary.

The rear display unit 34 is a display part that can be visually identified that exists on the rear part of the grip. The marks written on the rear display unit 34 are not particularly limited as long as they can be identified such as dots, lines, characters, symbols, and the like. Generally, when the rear display unit 34 is viewed from the back of the golf club, that is, when the golf club is viewed from the extended line of the grip shaft, the direction of the line connecting the grip shaft and the rear display unit 34 and the score of the golf club face surface The grip 26 is attached so that the direction of the line is parallel.
The rear display unit 34 is preferably provided at two or more positions in the longitudinal direction of the grip 26. By providing two or more locations, it is possible to mount the grip 26 so that each rear display 34 of the grip 26 is in a desired position. In addition, it is possible to detect the twist that tends to occur when the grip 26 made mainly of a flexible material such as rubber is mounted and to eliminate it if necessary.

Such a grip 26 is mounted so that the direction of the line connecting the center axis of the grip and the central portion of the front display portion 32 and the direction of the score line of the golf club face surface of the golf club head 24 are parallel. Therefore, the back line 28 is mounted at a position (center position) rotated by 3 to 50 degrees to the left or right from the 180 degrees circumferential position.
That is, as shown in FIGS. 7A and 7B, the back line 28 of the grip 26 is provided on the cutting plane when the grip 26 and the golf club shaft 22 are cut perpendicularly to the central axis of the golf club shaft 22. A straight line L passing through the central axis of the golf club shaft 22 from a circumferential position around the golf club shaft and a golf club is placed on a horizontal plane according to the lie angle, and a horizontal line on the face surface of the golf club head 24 is set as the cutting plane. When the projection line S is projected onto the golf ball, the direction of the straight line L is rotated 3 to 50 degrees in the backward direction and forward direction of the golf ball with respect to the direction of the orthogonal line S. This angle is called the grip angle. The term “rotating” in the present invention refers to the clockwise rotation direction when viewed from the extension line from the plug portion of the grip shaft. Therefore, in FIG. 7A, the grip angle is negative. In the case shown in FIG. 7 (a), the face at the time of impact opens, so that it exhibits a slicing tendency.

On the other hand, in the example of FIG. 7B in which the grip angle is positive, the direction of the straight line L is rotated to the right in the drawing of the golf ball with respect to the direction of the orthogonal line S. In the case shown in FIG. 7B, since the face at the time of impact is closed, it exhibits a hook-prone ball.
FIG. 7C shows a case where the grip angle different from the present invention is zero.

  The horizontal line on the face surface of the golf club head 24 is a reference plane in a state where the golf club 20 is installed at a normal address position (installed according to the lie angle) as shown in FIGS. (Horizontal plane) A straight line on the face surface 24b parallel to H. This horizontal line is generally substituted by a straight line parallel to the score line or the score line 25. The score line 25 is set to indicate the reference of the face surface 24b. When the score line 25 is not linear, for example, a line parallel to the reference surface H is attached to the face surface 24b as a mark on the face surface 24b when the score line 25 is installed at a normal address position. It can be a horizontal line.

Here, to install the golf club 20 at the normal address position means that the golf club head 14 is installed at the lie angle, and the golf club shaft of the golf club 20 as shown in FIGS. 8 (a) and 8 (b). The center axis CL and the leading edge 24a are set so as to be parallel to each other and parallel to the score line 25.
The installation according to the lie angle means that the score line 25 provided on the face surface is parallel to the tip portion 66a (see FIG. 3) of the face angle adjustment jig 66 as described above. It means that the gap between the round of the sole portion and the reference surface H is set to be substantially equal on the toe side and the heel side. Further, as described above, when the convex portion of the sole portion is unclear and the score line is not linear and parallel to the reference plane H cannot be determined, the lie angle is 100-golf club length ( It is set as the value of (inch) and installed according to the lie angle.
Further, when the score line is not linear, the fact that the center axis CL of the golf club shaft and the leading edge 14a are parallel to each other indicates a state in which the face angle is 0 degree, and this is substituted.
In a normal address position, the direction of the leading edge 24a is set to a direction perpendicular to the direction indicated by the face surface.

  As described above, the direction of the face surface 24b is specified and the golf club head dimensions are measured with the normal address position set. This is possible with a measuring instrument such as a club angle measuring instrument or a golf club gauge manufactured by Golf Smith. Such a measuring device may be any known one, and is not particularly limited in the present invention.

The golf club 20 having such a grip angle can measure the orientation of the score line of the golf club head 24 and the circumferential position of the protrusion of the back line 28 with the measuring device 40 shown in FIG. . Specifically, the angle scale plate 43 is disposed at the end of the grip 26 while the golf club shaft 22 is rotatably supported by a support member 45 provided on the plane A. Reference numeral 44 denotes a scale indicating plate.
As shown in FIG. 9, the pad member 41 can move in the X direction parallel to the plane A, and can swing in the C direction so as to have an inclination angle with respect to the plane A.
First, the pad member 41 is swung in the C direction to fix the tilt angle so as to match the lie angle of the golf club head 24, and the pad member 41 is moved in the X direction while the plane of the pad member 41 and the face are fixed. The golf club shaft 12 is rotated so that the surface 24b exactly matches, so that the score line 15 of the face surface 14b faces in the vertical direction, and the scale on the angle scale plate 33 at this time is read (angle A).

  Further, using the laser outer diameter measuring device 48, the outer diameter at a position 120 mm from the end of the grip 26 is measured by rotating the golf club shaft 22 once. The measurement result is displayed by the processing device 49, the portion of the protruding portion of the back line 28 is obtained, and the scale of the angle scale plate 43 at the center of this portion is read (angle B). The direction of the portion indicated by the maximum outer diameter obtained by the laser outer diameter measuring device 48 is the direction of the protruding portion of the back line.

Thus, from the read angle A and angle B, an angle (grip angle) formed between the back line 28 and the direction of the score line provided on the face surface can be obtained. That is, the golf club shaft 22 is golfed from a circumferential position around the golf club shaft 22 where the back line 28 of the grip 26 is provided on a cutting plane when the grip 26 and the golf club shaft 22 are cut perpendicularly to the central axis of the golf club shaft 22. A straight line passing through the central axis of the club shaft 22 and the golf club 20 placed on a horizontal plane according to the lie angle, and a horizontal line on the face surface of the golf club head 24 projected onto the cutting plane (parallel to the score line) When the straight line is determined, the grip angle formed by the direction of the straight line with respect to the direction of the projection line can be calculated.
The center of the back line 28 is a position farthest from the center axis of the grip 26. Further, when the grip angle is obtained, the back line 18 may be twisted to form a certain grip angle. In this case, the grip angle may be obtained with reference to the center position of the back line 28 at a position of 120 mm along the direction of the center axis of the grip 26 from the end of the grip 26.

In the golf club set of the present invention, the golf club set according to the present invention has a grip angle θ formed by the direction of the straight line L with respect to the direction of the orthogonal line S. All golf clubs having a loft angle within a specified range of 20 to 41 degrees. In 6 (A3 to A8), the absolute value is 3 to 50 degrees. In this case, the variation of the grip angle θ is preferably 10 degrees or less, and more preferably 5 degrees or less.
In the present invention, a golf club having a loft angle in the range of 20 to 41 degrees is intended for a golf club having a loft angle in this range, particularly in a golf club set with a favorable tendency of spherical muscles. Because it is required to obtain. Golf clubs with a loft angle outside the range of 20 to 41 degrees are more likely to pursue the distance of hitting the ball or change the opening and closing of the face rather than aligning the tendency of the ball muscles to obtain a favorable direction. It is used like hitting a ball.
In addition, for all six golf clubs A3 to A8 having a loft angle in the specified range of 20 to 41 degrees, the golf ball is represented by a continuous natural number X starting from 1 in order from the smallest loft angle, and the grip angle is Y When the grip angle Y with respect to the natural number X expressed by the regression line is regressed with a regression line, the slope of the regression line is preferably −1 or less. The slope of this regression line is more preferably −2 or less. That is, it is preferable that the setting is made so that the ball tendencies from the hook tendency to the slice tendency tend to appear as the golf club count increases. This is because a golfer generally tends to exhibit a slicing tendency of a long iron.

When the grip angle θ is 3 to 50 degrees as a negative angle, the ball of the golf ball to be launched tends to slice. That is, the convex back line 28 is used as a clue when the golfer holds the grip 26 and supports the golf club 20 with the belly of the finger (middle finger, ring finger), and determines the address state based on this. Therefore, at the time of impact when returning from the top state to the address state, when the grip angle is 0, the face surface is square as shown in FIG. 7C. On the other hand, when the grip angle θ <0 degrees, the face surface opens as shown in FIG. Conversely, when the grip angle θ> 0 degrees, the face surface is closed as shown in FIG.
In the golf club set 10 described above, the grip angle θ> 0 degree or θ <0 degree is satisfied in all the golf clubs (six A3 to A8) having a loft angle within a specified range of 20 to 41 degrees. The absolute value is 3 to 50 degrees. For this reason, in the case of a golfer who hits the grip angle θ> 0 degrees to the right, the tendency that the hit ball flies in the left direction (hook direction) becomes strong. Further, in the case of a golfer who hits the grip angle θ <0 degrees to the right, the tendency that the hit ball flies in the right direction (slice direction) becomes strong. Therefore, a golf club set with a grip angle θ> 0 is generally preferable for a golf player with a slicing tendency, and a golf club set with a grip angle θ <0 is generally preferable for a golfer with a hook tendency.

The golf club set 10 is a set of iron golf clubs having a loft angle set to 20 to 41 degrees. The golf club set includes wood and utility golf clubs having a loft angle of 13 ° to 24 °. It may be.
Even in this case, it is possible to provide a product obtained by rotating the grip angle θ by 3 to 50 or −50 to −3 degrees. Also in this case, a golf club set with a grip angle θ <0 is generally preferable for a golf player with a hook tendency, and a golf club set with a grip angle θ> 0 is generally preferable for a golfer with a slice tendency.

In general, the grip 26 has a front display portion 32. The front display portion 32 points to the front direction of the golf club 20, and serves as a mark when the golfer grips. Depending on the purpose of the shot, there are cases where several types of grips are made, and the front display unit 32 may be obstructive. In some cases, the front display unit 32 is not provided. However, in consideration of attaching the grip 26 to the golf club 20, it is preferable that the grip 26 has a mark. In such a case, it is preferable to have the front display unit 32 or the back display unit 34.
In addition, as described above, it is preferable that the twist that tends to occur at the time of mounting the grip 26 can be detected and can be eliminated as necessary. Therefore, the front display unit and the rear display unit are preferable because more marks are preferable. It is preferable to have.

In this way, in the golf club 20, it is possible to exhibit a slicing tendency or a hook tendency spherical muscle by intentionally changing the circumferential position of the back line 28.
Such a grip 26 has a position of the front display unit 32 so that the back line 28 is as shown in FIGS. 7A and 7B with respect to the position of the front display unit 32 displaying the logo mark. It may be provided at a circumferential position 130 to 177 clockwise and 130 to 177 degrees counterclockwise. Alternatively, it may be provided at a circumferential position 3 to 50 degrees clockwise and 3 to 50 degrees counterclockwise with respect to the position of the rear display unit 34.
Since such a grip 26 is mounted so that a straight line connecting the front display unit 32 and the center axis of the grip is parallel to the direction of the score line on the face surface, the grip angle θ becomes positive or negative, and the hook It presents a tendency or slice tendency of the bulb.

The conventional grip has a back line at a position rotated 180 degrees in the circumferential direction around the center axis of the grip with respect to the front display unit. Alternatively, the back line is provided in the same direction as the rear display unit.
In the present invention, the tendency of the spherical muscles is mainly adjusted by the grip 26 by setting the back line 28 so as to have different relative positional relationships as appropriate without being constrained with respect to the front display unit 32 or the rear display unit 34. Or it can be made to respond more favorably depending on how each golfer grips.
Further, from the aspect of attaching the grip 26 to the golf club 20, for example, the front display portion 32 of the grip 26 is attached to the golf club 20 by attaching the grip 26 with the front display portion 32 or the rear display portion 34 as a mark. It is possible to appropriately set the direction of the back line 28 while being mounted in front of the device, so that the mounting is easy and the object of the present invention can be achieved.

The golf clubs in the golf club set 10 have the grip angle θ set based on the back line 28 rotated within a predetermined range. A golf club having a grip mounted on a golf club shaft in a state in which the direction of a straight line connecting the center axis of the grip from the circumferential position is rotated at a predetermined angle with respect to the direction of the score line of the golf club face surface. Provide golf club set.
In such a golf club, in the cutting plane when the grip and the golf club shaft are cut perpendicularly to the central axis of the golf club shaft, the center of the golf club shaft is located from the circumferential position of the center of the front display portion marked on the grip. When the straight line passing through the axis and the projection line when the golf club is placed on the horizontal plane according to the lie angle and the horizontal line on the face surface of the golf club head is projected onto the cutting plane are determined, the direction of the straight line is: All golf clubs having a loft angle in the specified range of 20 to 41 degrees are rotated 3 to 50 degrees in absolute value with respect to the direction of the projection line.
A golfer often grips the grip 26 using the positions of the front display unit 32 and the rear display unit 34 as a guide. For this reason, it is possible to adjust the ball of the golf ball of the golfer who holds the grip 26 using the front display unit 32 and the rear display unit 34 with an angle of 3 to 50 degrees as a mark.
The golf club set includes a golf club set including a golf club set including a golf club having a loft angle of 20 to 41 degrees and a golf club set having a relatively small loft angle, for example, a loft angle. May be a golf club set including a wood golf club and utility golf club of 13 ° to 24 °. Also in this case, the direction of the straight line is rotated by 3 to 50 degrees in absolute value with respect to the direction of the projection line, and the grip is attached to the golf club shaft. In the present invention, a golf club having a loft angle in a range of 13 ° to 24 ° in a golf club set including a set of golf clubs including a wood golf club and a utility golf club having a relatively small loft angle is used. The reason for this is that these golf clubs are required to obtain a favorable directionality especially by aligning the tendency of the spherical muscles.

Hereinafter, the effect of the golf club set of the present invention was examined.
First, an iron golf club set (conventional example 1) having a grip angle θ = 0 ° was prepared as a golf club set, and 15 golfers (golfers A to O) were hit.
Using the golf club set of Conventional Example 1, five balls were hit toward a predetermined target, and the lateral blur width (m) for each hit ball was recorded. From the viewpoint of the golfer, the shake in the right direction (slice direction) is −, and the shake in the left direction (hook direction) is +. The average of the shake widths of all the counts was obtained from the shake width data, and was defined as “direction average (m)”. Thus, the golf ball of each golfer was obtained using Conventional Example 1.
Of all the golf club sets, the number with the smallest loft angle is 1, and in order, 2, 3, 4,..., The numbers are plotted on the horizontal axis and the blur width is plotted on the vertical axis. A regression line was obtained, and the slope of the regression line at this time was defined as “direction average slope”.
Table 1 below shows the result of “direction average (m)” for each golfer (golfers A to O). In addition, the golfers a to o are golfers corresponding to any one of the golfers A to O, in which the golfers A to O are rearranged in the order of the “direction average inclination”.

As can be seen from Table 1, it can be seen that the golfer A has the strongest slicing tendency (direction average −7.4 m) and the golfer O has the strongest hook tendency (direction average 5.7 m). In addition, the golfer a hits the ball muscle most dependent on the count (direction average inclination 1.8).
In such golfers A, O and a, the golf clubs of Examples 1 to 8, 9 to 16 and Conventional Examples 1 and 2 shown in Table 2 and Table 3 below are used to hit the golfer 5 balls at a time, The blur width (m) was measured. In any golf club set, the same golf club head and golf club shaft were used.

Since golfer A has a slicing tendency, the golf club set preferably has a hook tendency. Therefore, the golfer A was hit using the golf club sets of Examples 5 to 8 and 13 to 16. At that time, the golf club set of Conventional Examples 1 and 2 was used to hit the ball. On the other hand, since the golfer O hits the ball with a hook tendency, the golf club set preferably has a slicing tendency. Therefore, golf players O were hit using the golf club sets of Examples 1 to 4 and 9 to 12. At that time, the golf club set of Conventional Examples 1 and 2 was used to hit the ball.
Also, since golfer a has a feature that tends to be hooked as the golf count increases, the golf club set of Examples 3, 4, 7, 8, 11, 12, 15, 16 in which the grip angle changes depending on the count. It was used to hit the ball. At that time, the golf club sets of Conventional Examples 1 and 2 were also used for hitting. In Examples 3, 4, 7, 8, 11, 12, 15, and 16, the slope of the regression line when the relationship between the number represented by a natural number and the grip angle is regressed with a regression line is −1 or less. .
Tables 4 to 6 below show the results.

  As can be seen from Table 4, in Examples 5 to 8, the absolute value of “direction average (m)” is smaller than that of Conventional Example 1. That is, according to Examples 5 to 8, it can be seen that the characteristics of the golfer A in which the hit ball tends to fly to the right are relaxed. Also in Examples 13-16 which are wood type golf club sets, it turns out that the characteristic of the golfer with which a hit ball tends to fly to the right with respect to the prior art example 2 is eased.

  On the other hand, as can be seen from Table 5, in Examples 1 to 4, the absolute value of “direction average (m)” is smaller than that in Conventional Example 1. That is, according to Examples 1 to 4, it can be seen that the characteristics of the golfer O in which the hit ball tends to fly to the left are relaxed. Also in Examples 9 to 12 which are wood type golf club sets, it can be seen that the golfer's characteristic that the hit ball tends to fly to the left as compared with Conventional Example 2 is relaxed.

On the other hand, the golfer a is a right-handed golfer, and the ball whose ball loft angle is smaller tends to fly relatively to the right. For each golf club set, each golf club hits five balls in a predetermined target direction, and the lateral blur width (m) for each hit ball is − on the right side and + on the left side when viewed from the hit ball side. As a result, the blur width (m) of each count was recorded. Plotting the smallest loft angle as 1, plotting the count as 2 and 3 in order, the blur width (m) recorded earlier on the vertical axis, and calculating the regression line, from the regression line The “direction average slope”, which is the slope, was determined. According to Table 6, it can be seen that the “direction average slope” in Examples 3, 4, 7, and 8 is smaller than the absolute value of “direction average slope” in Conventional Example 1. That is, according to Examples 3, 4, 7, and 8, it is understood that the golfer's symptom that the hit ball tends to fly to the right is relatively reduced as the loft angle is smaller.
It can also be seen that the “direction average inclination” in Examples 11, 12, 15, and 16 which are wood-based golf club sets is smaller than the absolute value of “direction average inclination” in Conventional Example 2. That is, according to Examples 11, 12, 15, and 16, it is understood that the golfer's symptom that the hit ball tends to fly to the right is relatively reduced as the loft angle is smaller.

  The golf club set and the golf club grip of the present invention have been described in detail above. However, the present invention is not limited to the above embodiment, and various improvements and modifications may be made without departing from the spirit of the present invention. Of course it is good.

It is a mimetic diagram showing an example of a golf club set of the present invention. It is explanatory drawing explaining the measurement of the loft angle of a golf club using the loft angle measuring device. It is the elements on larger scale of the explanatory view shown in FIG. (A), (b) is explanatory drawing explaining the measurement of the loft angle of a golf club using the loft angle measuring device shown in FIG. (A)-(c) is a figure explaining the golf club in the golf club set of this invention. It is a figure explaining an example of the grip for golf clubs of this invention. (A)-(c) is a figure explaining the direction of a grip angle and a face surface. (A), (b) is a figure explaining the horizontal line on the face surface of a golf club head. It is a figure which shows an example of the measuring device which measures a grip angle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Golf club set 12,22 Golf club shaft 14,24 Golf club head 15 Face surface 16,26 Grip 19 Socket 20 Golf club 28 Back line 30 Flat part 32 Front display part 34 Rear display part 40 Measuring device 41 Pad member 42 Reading Edge 43 Angle scale plate 44 Scale indicator plate 45 Support member 48 Laser outer diameter measuring instrument 49 Processing device 60 Loft angle measuring instrument 62 Reference surface 63 Lie angle adjusting section 66 Face angle adjusting tool 70 Protractor

Claims (8)

The golf club has a plurality of golf clubs each having a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. Each golf club set is different,
In the cutting plane when the grip and the golf club shaft are cut perpendicularly to the central axis of the golf club shaft, the central axis of the golf club shaft from the circumferential position around the golf club shaft provided with the back line of the grip When the golf club is placed on a horizontal plane according to the lie angle and a horizontal line on the face surface of the golf club head is projected onto the cutting plane, the direction of the straight line is determined to be loft. A golf club set, wherein all golf clubs having an angle in a specified range of 20 to 41 degrees are rotated 3 to 50 degrees in absolute value with respect to the direction of the projection line. The golf club has a plurality of golf clubs each having a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. Each golf club set is different,
In the cutting plane when the grip and the golf club shaft are cut perpendicularly to the central axis of the golf club shaft, from the circumferential position around the golf club shaft at the center of the display portion representing the mark marked on the grip When a straight line passing through the central axis of the golf club shaft and a projection line when the golf club is placed on a horizontal plane according to the lie angle and a horizontal line on the face surface of the golf club head is projected onto the cutting plane are determined, A golf club set characterized in that the direction of the straight line is rotated by 3 to 50 degrees in absolute value with respect to the direction of the projection line in all golf clubs having a loft angle within a specified range of 20 to 41 degrees. . The golf club has a plurality of golf clubs each having a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. Each golf club set is different,
In the cutting plane when the grip and the golf club shaft are cut perpendicularly to the central axis of the golf club shaft, the central axis of the golf club shaft from the circumferential position around the golf club shaft provided with the back line of the grip When the golf club is placed on a horizontal plane according to the lie angle and a horizontal line on the face surface of the golf club head is projected onto the cutting plane, the direction of the straight line is determined to be loft. A golf club set, wherein all golf clubs having an angle in a specified range of 13 to 24 degrees are rotated 3 to 50 degrees in absolute value with respect to the direction of the projection line. The golf club has a plurality of golf clubs each having a golf club having a golf club head attached to the front end portion of the golf club shaft and a grip attached to the rear end portion of the golf club shaft. Each golf club set is different,
In the cutting plane when the grip and the golf club shaft are cut perpendicularly to the central axis of the golf club shaft, from the circumferential position around the golf club shaft at the center of the display portion representing the mark marked on the grip When a straight line passing through the central axis of the golf club shaft and a projection line when the golf club is placed on a horizontal plane according to the lie angle and a horizontal line on the face surface of the golf club head is projected onto the cutting plane are determined, A golf club set characterized in that the direction of the straight line is rotated 3 to 50 degrees in absolute value with respect to the direction of the projection line in all golf clubs having a loft angle in a specified range of 13 to 24 degrees. . The golf club set according to any one of claims 1 to 4, wherein the variation in the angle is 10 degrees or less in a golf club having a loft angle within the specified range.   For all golf clubs in the specified range, the loft angle is represented by a continuous natural number X starting from 1 in order from the smallest count, and the angle is represented by Y, and the angle Y relative to the natural number X is regressed with a regression line. The golf club set according to any one of claims 1 to 5, wherein an inclination of the regression line is -1 or less. A grip for a cylindrical golf club to be attached to an end of a golf club shaft,
A display for displaying an identification mark on the cylindrical surface;
A back line along the longitudinal direction of the golf club shaft,
The golf club grip, wherein the back line is provided at a cylindrical circumferential position 130 to 177 degrees apart in absolute value with respect to the position of the display unit. A grip for a cylindrical golf club to be attached to an end of a golf club shaft,
A display for displaying an identification mark on the cylindrical surface;
A back line along the longitudinal direction of the golf club shaft,
The golf club grip, wherein the back line is provided at a cylindrical circumferential position that is 3 to 50 degrees away from the position of the display unit in absolute value.

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