JPH10267781A - Method and device for measuring position of gravitational center of golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for measuring the position of the gravitational center of a golf club head, enabling measurements to be made for an angle formed between a plane containing the shaft axis of the club head and passing through the point of the gravitational center of the club head and a plane containing the shaft axis and being parallel to a leading edge, without being affected by the lie angle of the club head and the positions of gravitational centers of other elements. SOLUTION: A club head 12 whose angle is to be measured is mounted at the end of a shaft pin 13, and an angle reading device 17 is provided at the rear end of the shaft pin 13. A guide rail 18 is laid on the side of a lower baseplate 11 on which the club head 12 is mounted, and a moving block 19 that is slidable along the guide rail 18 is provided on the guide rail 18, and a putt member 21 whose swaying position can be adjusted to the lie angle βof the club head 12 via a hinge member 20 is provided on the moving block 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the center of gravity of a golf club head, and more particularly to determining the relationship between the center of gravity of the club head and the club face surface by specific numerical values. The present invention relates to a method and an apparatus for measuring the center of gravity of a golf club head, which enables the above.

[0002]

2. Description of the Related Art Generally, golf club heads other than putter golf clubs do not exist on the center axis of a shaft pin due to its characteristics and restrictions on rules. The direction of the center of gravity of the golf club head relative to the face of the golf club affects the hitting characteristics. By the way, as a clue indicated by the center of gravity of the golf club head, there is a center of gravity angle.

The method of measuring the angle of the center of gravity is as follows.
Is mounted on a horizontal surface in a freely rotatable and parallel manner so that the club head 1 is suspended by its own weight, and the lie angle of the club head (the shaft pin when the sole portion of the club head is mounted on the horizontal surface) The angle between the vertical direction and the leading edge was read along the angle of inclination with respect to the horizontal plane), and this value was defined as the center of gravity angle.

[0004]

However, the conventional method of measuring the center of gravity angle as described above is based on the lie angle of the club head (the difference between the club shaft and the horizontal surface when the sole portion of the club head is placed on a horizontal surface). Since the measurement is performed along the inclination angle, the center of gravity of each club head is determined, and is not the center of gravity of the general (pure) measurement concept described above.

[0005] For this reason, for example, when designing as a golf club set, there is a problem that it is not possible to set a unified club set unless the lie angle is set to a constant value. That is, when setting a club head as a set, it is easier to manage, set, and study a golf club by providing a pure index that does not include other elements.

The present invention has been devised in view of such a conventional problem, and is not affected by the lie angle of the club head and other factors unrelated to the position of the center of gravity. It is an object of the present invention to provide a method and an apparatus for measuring the position of the center of gravity of a golf club head, which makes it possible to obtain the relationship with the specific numerical values.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to support a shaft pin for detachably mounting a club head on a horizontal base plate in parallel and rotatable with respect to the base plate. The support rail is vertically erected, and a guide rail is laid on the lower base plate on the side where the club head at the tip of the shaft pin is to be mounted, in a direction orthogonal to the shaft pin and parallel to the base plate. In addition to providing a movable block that can slide along the rail,
A pad member is provided on the moving block so as to be capable of swinging and positioning in accordance with a lie angle of the club head via a hinge member. A rear end side of the shaft pin includes a shaft axis of the club head, and a center of gravity of the club head is provided. A plane passing through the points,
The gist of the invention is to provide an angle reading device including a scale plate for determining an angle formed by a plane parallel to the leading edge and including the shaft axis, and a scale indicating unit.

According to the present invention, a shaft pin having a club head mounted on a tip end side thereof is supported on a horizontal base plate in a manner parallel and rotatable with the base plate, and the club head hangs down by its own weight. In this state, the first angle is read by an angle reading device provided on the rear end side of the shaft pin. Next, the pad member is appropriately slid and fixed so that the leading edge of the club head is perpendicular to the base plate. In this state, the second angle is read by the angle reading device, and the first angle is read. The difference between the angle reading and the second angle reading is determined to provide a plane that includes the shaft axis of the club head and passes through the center of gravity of the club head, and that includes the shaft axis and is parallel to the leading edge. By determining the angle between the plane and the plane, the relationship between the center of gravity of the club head and the club face surface is determined by specific numerical values without being affected by the lie angle of the club head and other factors unrelated to the position of the center of gravity. This makes it possible to easily carry out research on the management, setting and the golf club management.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is an overall perspective view of a measuring device for performing a method of measuring the center of gravity of a golf club head, FIG. 2 is an enlarged perspective view of a portion A in FIG.
FIG. 3 shows a side view at the time of measurement. The measuring device 10 supports, on a horizontal base plate 11, a shaft pin 13 for detachably mounting a club head 12 in a parallel and rotatable manner with respect to the base plate 11. Support plate 14 is vertically provided.

That is, a bearing member 15 for inserting the shaft pin 13 and instructing the shaft to rotate freely is provided on the upper portion of the vertically standing support plate 14. Is mounted with a club head 12 (in this embodiment, an iron golf club head, but may be a wood golf club head) for which the center of gravity angle α or the like is to be measured.
An angle reading device 17 described later is provided.

A guide rail 18 is laid on the lower base plate 11 on the side where the club head 12 is mounted, in a direction orthogonal to the shaft pins 13, that is, in a width direction orthogonal to the longitudinal direction of the lower base plate 11. A movable block 19 slidable along the guide rail 18 is provided on the guide rail 18, and a line of the club head 12 is placed on the movable block 19 via a hinge member 20 as shown in FIG. There is provided a pad member 21 which can be swingably positioned in accordance with the angle β.

The hinge member 20 comprises a receiving member 20a having a concave cross section and a supporting portion 21b of a pad member 21 pivotally connected to the receiving member 20a via a pin 20b. The bottom surface is formed in a semicircular arc shape, and a slight gap h is formed between the bottom surface and the receiving member 20a. At the rear end of the shaft pin 13, an angle formed by a plane including the shaft axis of the club head 12 and passing through the center of gravity G of the club head 12 and a plane including the shaft axis and parallel to the leading edge 22. An angle reading device 17 including a scale plate 23 for obtaining (α) and a scale indicating section 24 is provided.

Next, the center of gravity G of the club head 12 including the shaft axis of the club head 12 is measured using the measuring device 10.
Including the plane passing through and the shaft axis, leading
A method for obtaining an angle (α) between the plane and the plane parallel to the edge 22 will be described. First, the horizontal base plate 11
A shaft pin 13 on which the club head 12 is mounted on the distal end side is rotatably supported in parallel with the base plate 11, and the first angle of the shaft pin 13 is adjusted with the club head 12 hanging down by its own weight. Reading is performed by an angle reading device 17 provided on the rear end side.

Next, the pad member 21 is connected to the club head 1.
2 so that the pad member 21 and the club face are in close contact with each other as shown in FIG. 3, ie, the leading edge 22 in FIG.
Is slidably fixed along the guide rail 18 so as to be perpendicular to the base plate 11, and in this state, a second angle is read by the angle reading device 17, and the first angle is read. The difference between the read value and the second angle is obtained by calculating the difference between the read value and the second angle.
An angle (α) between a plane including the shaft axis and passing through the center of gravity G of the club head 12 and a plane including the shaft axis and parallel to the leading edge 22 is determined.

When reading the first angle, the scale of the angle reading device 17 may be set to zero to read the second angle. Including the shaft axis of the club head 12 by the method as described above, including a plane passing through the center of gravity G of the club head 12 and the shaft axis,
By determining the angle (α) between the club head 12 and the plane parallel to the leading edge 22, the club face 12 is not affected by the lie angle β of the club head 12 and other factors unrelated to the center of gravity. The relationship with the plane can be obtained by specific numerical values.

Further, the present invention can be easily performed in management and setting of a golf club. Next, an example of designing a golf club set based on the above-described embodiment will be described. FIG. 5A shows a first embodiment of the present invention.
In the case of designing as a golf club set, when the golf club is designed for an average golfer (S1) and a golfer who cannot catch the ball, that is, for a golfer who wants to correct the slicing tendency (S2), furthermore, For a golfer who wants to correct the tendency of hooking, that is, for a golfer who wants to correct the hook tendency (S3), a plane including the shaft axis of the club head 12 and passing through the center of gravity G of the club head 12,
It is an embodiment of the golf club set in the case where an angle (α) between the plane including the shaft axis and the plane parallel to the leading edge 22 is set.

FIG. 5B shows a second embodiment of the present invention.
The ball cannot be caught accurately by the club on the long iron side, that is, includes the shaft axis of the club head 12 for the golfer who wants to correct the slicing tendency, and passes through the center of gravity G of the club head 12. Including a plane and the shaft axis, leading edge 2
7 is an embodiment of a golf club set when an angle (α) between the plane and a plane parallel to 2 is set.

FIG. 5C shows a third embodiment of the present invention.
It is not possible to accurately catch the ball with the club on the short iron side, that is, including the shaft axis of the club head 12 for golfers who want to correct the slicing tendency, and the center of gravity G of the club head 12 This is an embodiment of the golf club set when an angle (α) between a plane passing through and a plane including the shaft axis and parallel to the leading edge 22 is set.

In addition, a plane including the shaft axis of the club head 12 as appropriate, passing through the center of gravity G of the club head 12, and a leading edge 22 including the shaft axis.
By adjusting the angle (α) with a plane parallel to the above, golf beginners to advanced golfers can be supported.

[0020]

Since the present invention is constructed as described above, the relationship between the center of gravity of the club head and the club face is not affected by the lie angle of the club head and other factors unrelated to the position of the center of gravity. Since it is possible to obtain a specific numerical value, there is an effect that it is possible to easily carry out research on the management, setting, and the management of the golf club.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a measuring device for implementing a method of measuring a center of gravity position of a golf club head.

FIG. 2 is an enlarged perspective view of a portion A in FIG.

FIG. 3 is a side view at the time of measurement by a measuring device.

FIG. 4 is an explanatory diagram of a conventional method for obtaining a center of gravity angle of a club head.

5 (a) to 5 (c) are graph explanatory diagrams showing each embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Measuring device 11 Base plate 12 Club head 13 Shaft pin 14 Support plate 15 Bearing member 17 Angle reading device 18 Guide rail 19 Moving block 20 Hinge member 21 Pad member 22 Reading edge 23 Scale plate 24 Scale indicator G gravity center β lie angle α The angle between a plane that includes the shaft axis of the club head and passes through the center of gravity of the club head and a plane that includes the shaft axis and is parallel to the leading edge.

Claims (3)

[Claims] 1. A shaft pin having a club head mounted on a tip end side thereof is supported on a horizontal base plate in a manner parallel and rotatable with the base plate, and the first angle is set in a state where the club head hangs down by its own weight. Reading is performed by an angle reading device provided on the rear end side of the shaft pin, and then the pad member is moved so that the leading edge of the club head is perpendicular to the axis of the shaft pin, and the pad member is positioned at the lie angle of the club head. In this state, a second angle is read by the angle reading device, and a difference between the read value of the first angle and the read value of the second angle is obtained. A plane including the shaft axis of the club head and passing through the center of gravity of the club head, and a plane including the shaft axis and parallel to the leading edge. A method for measuring the position of the center of gravity of a golf club head that determines the angle of inclination. 2. The method of measuring a center of gravity of a golf club head according to claim 1, wherein, at the time of reading the first angle, the scale of the angle reading device is set to zero to read the second angle. 3. A support plate for supporting a shaft pin for detachably mounting a club head on a horizontal base plate in parallel with the base plate and rotatably supporting the shaft pin, wherein the shaft pin is provided vertically. On the lower base plate on the side where the club head is mounted, a guide rail is laid in a direction orthogonal to the shaft pin and parallel to the base plate, and a moving block slidable along the guide rail is provided on the guide rail, A pad member is provided on the moving block so as to be capable of swinging and positioning in accordance with a lie angle of the club head via a hinge member. A rear end side of the shaft pin includes a shaft axis of the club head. The angle between the plane passing through the point and the plane containing the shaft axis and parallel to the leading edge A center of gravity position of a golf club head, which is provided with an angle reading device comprising a scale plate and a scale indicating section for obtaining the following.