JPH0928840A - Golf club measuring method and measuring instrument - Google Patents

Abstract

(57) [Abstract] [Problem] Problem that the posture of the club must be changed every time the lie angle of the club, the loft of the face or the face progression is measured. Solves the problem that measurement values vary. A shaft of a golf club is supported by a club support (20) swingable with respect to a reference surface (40) in parallel with the club support, and a center line (3) of the golf shaft is supported.
1) and a reference edge (45a) parallel to the reference plane (40) and an imaginary plane that is perpendicular to the reference plane (40), and the groove of the club face is applied in parallel. Angle with respect to the reference plane (40) (lie angle)
And / or measure the angle (loft) of the club face with respect to the reference plane (40).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club measuring method and measuring instrument for measuring a lie angle of a golf club, a loft or a face progression of a face.

[0002]

2. Description of the Related Art Golf clubs (hereinafter simply referred to as "clubs")
The method and the measuring device for measuring the lie angle, the face loft or the face progression changed the posture to the club every time the lie angle, the face loft or the face progression were measured. For example,
When measuring the loft of an iron club, support the club head, measure the inclination of the club shaft at that time, and measure the lie angle with the sole of the club head placed on a horizontal plane. Measure the angle of the club shaft to the horizontal plane.

[0003]

The conventional method and apparatus for measuring a club are cumbersome because the club must be changed every time the lie angle, face loft or face progression is measured. In addition, there is a problem that the measured value varies depending on the posture of the club at the time of measurement.

[0004]

According to the measuring method of the present invention, a shaft of a golf club is supported by a club support swingable with respect to a reference plane in parallel with the club support, and a center line of the golf shaft. The groove of the club face is applied parallel to an imaginary plane that is perpendicular to the reference plane and a reference edge that is parallel to the reference plane, and in this state, the angle (lie angle) of the club support with respect to the reference plane and / Or the angle of the club face with respect to the reference plane (loft)
To measure. The measuring device for a club of the present invention includes a reference surface,
A club support swingable with respect to the reference plane, a club support means for supporting a club shaft on the club support in parallel with the club support, and a golf club supported by the club support. A club face regulating member having a virtual plane including the center line of the shaft and being perpendicular to the reference plane and a reference edge parallel to the reference plane, and being movable with respect to the reference plane in the reciprocating direction with respect to the virtual plane; And a protractor for measuring an inclination angle of the club support with respect to the reference plane. The club support means is substantially V
A gripper including a pair of V-shaped pieces having concave portions facing each other and provided at at least two positions of the club support, and a line connecting the centers of the concave portions is parallel to the club support. The reference edge of the club face regulating member is a knife edge.

[0005]

According to the present invention, the club face is regulated in a fixed direction by the club face regulating member movable with respect to the reference plane, and the lie angle of the club is maintained in a state where the club is held in a predetermined posture. , The face loft or the face progression can be measured, so that not only the measurement is simplified, but also the measurement value does not vary.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 denotes a club measuring instrument, and reference numeral 2 denotes its substrate. The protractor main body 3 is provided on the substrate 2 so as to be swingable about the shaft 4 by supporting the shaft 4 by a bearing 5. Bearing 5 is substrate 2
It is fixed to. The bottom free end 3a of the protractor body 3 is
The upper end of the bolt 6 screwed to the substrate 2 is in contact with the protractor body 3 by its own weight.

A lower arm 7a of a strip-shaped support base 7 is swingably supported by a shaft 8 above the bottom free end 3a. An arcuate slit 10 is formed in the protractor main body 3 about the axis 8 of the support base 7, and an arcuate rack 11 is provided on an inner edge thereof. A pinion 12 is engaged with the rack 11. Pinion 1
2 is rotatably provided on a shaft 13 planted on the side surface of the support base 7. The pinion 12 is provided with a knob 14 for rotating the pinion. Protractor body 3
The scale 15 (FIG. 4) constituting the protractor is engraved on the arc-shaped surface 3b centered on the axis 8, while the knob 1
As shown in FIG. 3, the base 16a of the indicator 16 cooperating with the scale 15 is loosely fitted between the pinion 4 and the pinion 12. The indicator 16 is provided with a set screw 17 with a knob for abutting the tip to the side surface of the protractor main body 3. The indicator 18, that is, the support is provided by screwing or loosening the set screw 17 with the knob 18. The base 7 is fixed to the protractor main body 3 or is free from the protractor main body 3.

A club support 20 is slidably supported on the support base 7 by two parallel guide rods 21. The guide rods 21 are fixed at both ends thereof to the rising portions 22 and 23 at the upper and lower ends of the support base 7, and a guide rod receiver 20 a provided on the back surface of the club support 20 is supported by each guide rod 21. ing. As shown in FIG. 5, the movement of the club support 20 along the guide rod 21 is performed by moving a rack 24 fixed to the back of the club support 20, a pinion 25 rotatably provided on the support base 7 side, and a pinion 25. The provisional fixation of the club support 20 to the support base 7 at a desired position is performed by the rotating knob 26. A set screw with a knob (not shown) provided on the club support 20 is screwed into the club support 20 and the tip thereof is guided by a guide rod. 21.

Referring to FIGS. 6 and 7, a club support 2 is shown.
A gripper 30 composed of a pair of V-shaped pieces 29 having substantially V-shaped recesses 28 opposed to each other at the upper and lower ends of the club 0, and a line 31 connecting the centers of the opposed recesses 28 is parallel to the club support 20. It is provided so that it becomes. Each V-shaped piece 29 has an axis 3
2, the swing piece 33 is swingably provided on the slide piece 33, and each slide piece 33 is screwed to a feed screw rod 35 integrally having a knob 34 at one end. The feed screw rod 35 has a right-hand thread 3
6R and a left-hand thread 36L are provided, and each slide piece 33 is screwed to each feed screw. Therefore, knob 3
By rotating the finger 4 rightward or leftward with the fingertip, the sliding pieces 33 facing each other, that is, the V-shaped pieces 29 can be moved toward or away from each other. The feed screw rod 35 is connected to a pair of bearings 20 provided on the club support 20.
b, is rotatably supported by the first screw 20 and is screwed into one of the bearings 20.
By engaging with a, movement in the axial direction is prevented.

Since the V-shaped piece 29 can swing freely, FIG.
As shown in FIG. 7, even when the gripper 30 grasps the step 37 of the shaft 38 of the club, the V-shaped pieces 29 hold the shaft 38 firmly in an inclined posture. Gripper 30
The center line of the shaft 38 supported by the center line coincides with the line 31 and is parallel to the club support 20.

In FIG. 1, a reference plane 40 is formed on the upper surface of the shaft 38 (FIG. 8) at the position where the lower end of the center line 31 is directed.
Is disposed. On the lower surface of the sliding member 41, a pair of V-grooves 42 including the center line 31 and being parallel to an imaginary plane perpendicular to the reference plane 40,
A pair of V-grooves 43 that are perpendicular to the V-grooves 42 are formed on the upper surface serving as one reference surface. The V-shaped groove 42 is slidably supported by a V-shaped rail 44 of a receiving table 47 fixed to the substrate 2.

A V-shaped rail 46 of a club face regulating member 45 is slidably fitted in the V-shaped groove 43 of the sliding member 41. The club face regulating member 45 has a reference edge 45a that is parallel to a virtual plane that includes the center line 31 and is perpendicular to the reference plane 40, and is movable in the forward and backward directions with respect to the virtual plane. The reference edge 45a is a knife edge so as to be easily engaged with the groove 51 of the club face 50, as shown in FIG.

Preparation for Measurement The measuring instrument 1 adjusts the height of the bolt 6 on the substrate 2 to swing the protractor body 3 around the axis 4 and
It is set so that 90 degrees in FIG. 4 is right above the center of the axis 8. Preparation for measurement of club lie angle, club face loft, and club face progression is as follows.

In FIG. 1, first, the club shaft is lightly supported by the V-shaped piece 29 of the gripper 30 in a state where the sole of the club head is lightly placed on the reference surface 40 or in a state of being close to the sole.

Next, as shown in FIG. 9, in order to engage the reference edge 45a of the club face regulating member 45 with the groove 51 of the club face 50, the inclination with respect to the reference surface 40 of the club shaft, the orientation of the club face, And Adjust the club face height. Adjustment of the inclination of the club shaft with respect to the reference surface 40 is performed by loosening the set screw 17 with the knob 18,
The pinion 12 is rotated by the knob 14 to swing the support base 7 about the shaft 8 with respect to the protractor main body 3 so that the groove of the club is substantially horizontal. To adjust the orientation of the club face, the club face 50 is
The club shaft is rotated with respect to the gripper 30 so that the club shaft is parallel to the reference edge 45a. The height of the club face is adjusted by moving the club supporter 20 up and down with respect to the support base 7 using the knob 26 (FIG. 5), or by moving the club shaft itself up and down with respect to the gripper 30. By the above adjustments, the reference edge 45a of the club face regulating member 45 is engaged with the groove 51 of the club face 50 as shown in FIG.
Is tightened to firmly fix the club shaft to the club support 20 with the gripper, and the preparation for club measurement is completed.

Measurement of Rie Angle Indicator 1 in Ready State for Club Measurement
6 Protractor scale 15 for lie angle measurement (Fig. 4)
Read.

Measurement of Loft As shown in FIG. 10, an angle θ of the club face with respect to a perpendicular line 61 standing on the reference plane 40 is measured. FIG. 11 shows an example of a protractor for loft measurement. The fan-shaped protractor 62
Right angle base 63 in which bottom 63a and pointing edge 63b form a right angle
The pivot is pivotally mounted on a shaft 64. The right-angled base 63 is placed on the reference surface 40, the 0-degree edge 62a of the protractor 62 is applied to the club face 50, and the scale of the protractor of the protractor 62 is read at the indicating edge 63b. If a projection is provided on the lower surface of the right-angled base 63 to engage with the V-shaped groove 43 (FIG. 1) provided on the reference surface 40, the measurement operation is facilitated.

Measurement of Face Progression In FIG. 1, an indicator rod whose lower end, which corresponds to the shaft of a club, forms a sharp point is supported by a club support 20 in parallel with the club support 20, and the point of intersection with the above-mentioned sharp end on a reference plane 40. Face progression is measured based on 0. For more information,
As shown in FIG. 10, the displacement Pi of the leading edge 50a with respect to an imaginary plane including the perpendicular 61 and the center line 31 of the club shaft (FIG. 1) is measured. In FIG. 10, the progression Pi of the iron club is behind (left in the figure) the virtual plane, but generally forward (right in the figure). The face progression can be read directly on the scale 66 marked on the reference surface 40 shown in FIG. 1, or can be measured by a micrometer having a spindle 67 which can move forward and backward with respect to the leading edge 50a as shown in FIG. With the vertical contact 67a of the spindle 67 aligned with the virtual plane 68, the micrometer number is set to 0, and then the vertical contact 67a is brought into contact with the leading edge 50a, and the micrometer number at that time is set. For example, 5 mm is read.
Since the leading edge is curved in a gentle convex shape, the progression is measured at the most protruding position.

The angle formed by the sole with respect to the reference plane 40 of the wood club, the so-called sole angle α, is also measured in the state shown in FIG. In FIG. 1, in the case of a short iron or a putter, the center line 31 rises with respect to a driver or a long iron, and at that time, the sliding member 41 is moved along the cradle 47 and brought to an optimum position. Can be

[Brief description of drawings]

FIG. 1 is a perspective view of a golf club measuring instrument according to an embodiment of the present invention.

FIG. 2 is a partially enlarged side view of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a rear view of the club support.

FIG. 6 is a front view of a gripper provided on a club support.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;

FIG. 8 is an enlarged partial cross-sectional view showing a state where the shaft is gripped by a gripper.

FIG. 9 is a perspective view showing a state in which a reference edge of the club face regulating member is engaged with a groove of the club face.

FIG. 10 is an explanatory view of the progression of the loft and the leading edge of the club face.

FIG. 11 is a front view showing an example of a method of measuring the loft of a club face using a protractor.

FIG. 12 is an explanatory diagram showing an example of a method for measuring the progression of a leading edge.

FIG. 13 is a perspective view showing only a support base.

[Explanation of symbols]

 Reference Signs List 1 club measuring device 3 protractor main body 15 scale 20 club support 29 V-shaped piece 30 gripper 31 shaft centerline 40 reference plane 45 club face regulating member 45a reference edge 41 sliding member 50 club face 50a leading edge 68 virtual plane Pi , Pw Progression θ Loft α Sole angle

Claims (6)

[Claims] 1. A virtual golf club supporting a shaft of a golf club parallel to the club support on a club support swingable with respect to the reference plane and including a center line of the golf shaft and perpendicular to the reference plane. A groove of the club face is applied parallel to the plane and a reference edge parallel to the reference plane, and in this state, an angle (lie angle) of the club support with respect to the reference plane and / or an angle of the club face with respect to the reference plane. A method for measuring a golf club for measuring (loft). 2. A method for measuring a golf club according to claim 1, wherein an indicator rod having a sharp lower end corresponding to a shaft of the golf club is supported by the club support in parallel with the club support. A method for measuring a golf club, in which the progression of the leading edge of the club face is measured based on the intersection with the apex on the reference surface. 3. A reference surface, a club support swingable with respect to the reference surface, club support means for supporting a shaft of a golf club on the club support in parallel with the club support, The golf club supported by the club support has a virtual plane that includes the center line of the shaft of the golf club and is perpendicular to the reference plane, and a reference edge that is parallel to the reference plane. A golf club measuring instrument comprising: a club face restricting member that is movable with respect to a reference plane; and a protractor that measures an inclination angle of the club support with respect to the reference plane. 4. A golf club measuring apparatus according to claim 3, wherein said club supporting means comprises at least a pair of V-shaped pieces having substantially V-shaped concave portions opposed to each other. It is a gripper provided in two places,
A golf club measuring instrument in which a line connecting the centers of the recesses is parallel to the club support. 5. The measuring instrument for a golf club according to claim 3 or 4, wherein the reference edge is a knife edge. 6. The golf club measuring instrument according to claim 3, 4, or 5, wherein the reference surface is an upper surface of a sliding member movably provided in a direction parallel to the virtual plane. Measuring instrument for golf clubs formed on the.