JP4002898B2 - Golf club measuring device - Google Patents

Description

  The present invention relates to a device for measuring characteristic values of a golf club, and more particularly to a golf club measuring device capable of measuring the weight, balance, and natural frequency of a golf club.

  A golf club has a head attached to the tip of the shaft and a grip attached to the base. The characteristics of a golf club include its weight and the weight of the club that is felt on the wrist when holding the grip. In addition, although the shaft is expressed as a hard shaft or a soft shaft, characteristic values such as the vibration (natural frequency) of the shaft when the club is shaken are also important as representing the hardness of the shaft. A hard shaft vibrates with a small amplitude and thus exhibits a large natural frequency, while a soft shaft is the opposite.

As described above, the balance represents the weight of the club felt on the wrist or the like when the grip is gripped, and a 5-inch measurement method, a 12-inch measurement method, a 14-inch measurement method, and the like are performed. For example, when measuring by the 14-inch measurement method, when the club is held with the position of 14 inches from the grip end of the club as a fulcrum, and the force F that balances the club is applied to the grip end, the balance K is obtained by 14 × F. be able to.
Then, the value of K is roughly classified into A to F from the lighter one, and each major classification is further classified into 10 into 0 to 9, and the weight of the club felt on the wrist or the like when gripping the grip is, for example, D5. Is displayed. Based on this display, the user can select a golf club having an optimal balance according to his / her power.

  As described above, these characteristic values are important factors in designing a golf club. Therefore, various apparatuses for measuring these characteristics have been proposed and put into practical use. And since the weight and balance of a golf club are fundamentally calculated | required by measuring a weight, both can usually be measured with one measuring apparatus normally. On the other hand, the natural frequency is measured by a photoelectric tube, a stroboscope, etc. while holding one end of the club and applying vibration to the shaft, so that the device becomes larger and becomes a dedicated device for measuring the natural frequency. There are many cases. Therefore, two measuring devices are required to measure the weight and balance of the golf club and the natural frequency.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club characteristic measuring apparatus having a simple structure and capable of measuring the weight and balance and natural frequency of a golf club with one apparatus.

In order to achieve such an object, the invention according to claim 1 is configured such that one end side of the action plate arranged in the horizontal direction on the upper part of the base is tilted via a fulcrum on the load cell arranged to be tiltable on the base. A clamper consisting of an upper movable clamp member and a lower fixed clamp member is arranged on the other end side of the working plate, and the lower surface of the fixed clamp member extends downward and is inserted into the through hole of the working plate. When the clamper does not grip the golf club, the fixed clamp member is placed on the action plate via the O-ring. The working plate is supported at a predetermined reference position of the working plate by a support member capable of releasing the support, and the golf club is placed in a horizontal posture by a fixed clamp member and a club pressing pin formed on the other end of the working plate. Support, The weight of the golf club is measured by the output signal of the load cell when the support plate of the holding member is released, and the balance of the golf club is measured by the output signal of the load cell when the support member supports the action plate. When the movable clamp member of the clamper rotates and cooperates with the fixed clamp member to grip the golf club in the state where the action plate support is released, the fixed clamp member descends a little and moves the action plate through the O-ring. with tilting, the lower end of the posts of the fixed clamp member, the clamper is supported in contact with the clamp support base disposed on the base and vibrated in the golf club shaft in this state, the vibration is O It is transmitted to the working plate through the ring, a total of the natural frequency of the golf club by the output signal of the load cell due to vibrations of the working plate To.

  Also, it is preferable to arrange two sets of clampers comprising a fixed clamp member and a movable clamp member, and to vibrate the shaft of the golf club by vibration when gripping the golf club by this clamper. By providing a time difference in the timing of gripping the golf club, vibration can be more reliably applied.

  The weight of the golf club can be measured by the output signal of the load cell when the support plate of the support member is released, and the balance of the golf club can be measured by the output signal of the load cell when the support member supports the action plate. When the golf club is gripped and vibration is applied to the shaft of the golf club in the state where the action plate support is released, the natural frequency of the golf club can be measured by the output signal of the load cell. That is, it is possible to measure the weight, balance and natural frequency of a golf club with a single device with a simple configuration. Further, the golf club shaft can be vibrated by gripping the golf club with a clamper, and the operation is very simple.

  The purpose of measuring the weight, balance and natural frequency of a golf club with a single device was realized with a simple configuration using a single load cell and supporting and releasing the action plate by a support member.

    Embodiments of the present invention will be specifically described below with reference to the drawings. In FIG. 1, a working plate 2 is disposed in the horizontal direction on the upper portion of a base 1. A tilting portion 41 is formed on the lower surface on one end side of the load cell 4, and the tilting portion 41 is fixed to the base 1. That is, the load cell 4 is disposed on the base 1 so as to be tiltable. A holding plate 52 is attached to the upper surface on the other end side of the load cell 4, and one end side of the action plate 2 is attached to the holding plate 52 via a fulcrum 5. Therefore, although the action plate 2 can be rotated around the fulcrum, the stopper 51 is disposed on the holding plate 52, and the clockwise rotation of the action plate 2 is restricted by the stopper 51. On the other end side of the action plate 2, a club presser pin 21 that holds and holds the grip end of the golf club GC held in a horizontal posture from above.

  The support member 6 is formed of an arc-shaped cam. The cam surface abuts on a protrusion 61 provided at a reference position on the lower surface of the action plate 2 to support the action plate 2, and the cam surface is rotated from the protrusion 61 by rotating. The support of the action plate 2 is released by separating. When the balance is measured by, for example, a 14-inch measurement method, the protrusion 61 has a distance of 14 inches (about 356 mm) from the other end of the action plate 2 where the grip end of the golf club GC held in a horizontal posture is located. ) Position.

  A clamper for gripping the grip G of the golf club GC includes a lower fixed clamp member 31 and an upper movable clamp member 32, and two sets of the clampers are arranged. As shown in FIG. 3, the fixed clamp members 31 and 31 are disposed on the holding plate 35, and the two support columns 33 extend downward from the holding plate 35. The support column 33 is inserted into a through hole formed in the action plate 2, and the lower portion of the support column 33 is connected by a connecting plate 36. An O-ring 34 made of a soft elastic member is disposed at the upper end of the support 33, and the holding plate 3, that is, the fixed clamp members 31, 31 are placed on the working plate 2 via the O-ring 34. The level of the fixed clamp members 31 and 31 is slightly lower than the fixed clamp member 31 on the grip end side than the fixed clamp member 31 on the head side, and the golf club GC is inclined slightly when the grip G of the golf club GC is gripped. It has become. Further, a clamp support 12 is disposed on the base 1, and when the grip G of the golf club GC is not gripped by the clamp, the lower end surface of the support 33 is separated from the upper surface of the ramp support 12. Facing each other.

  Two holding walls 11 are erected on the base 1, and a motor M is attached to each of the holding walls 11. As shown in FIG. 2, the output shaft of the motor M is connected to a group of reduction gears 38, and an arm 37 having a movable clamp member 32 fixed to the tip is attached to the final reduction gear 38. . Accordingly, when the motor M rotates forward and backward, the movable clamp member 32 rotates so as to approach / separate the fixed clamp member 31 and clamp / unclamp the grip G of the golf club GC.

  Thus, when measuring the weight of the golf club GC, as shown in FIG. 1, the support of the support member 6 is released, and the grip G is held by one fixed clamp member 31 and the club presser pin 21. The golf club GC is in a horizontal position. In this state, the weight measured by the load cell 4 is increased by the weight of the golf club GC compared to before the golf club GC is held, so that the weight of the golf club GC can be obtained from the increase. The output signal of the load cell 4 is amplified by an amplifier in the control box to become an analog output of 0 to 5 V. This output is A / D converted and calculated by the CPU unit, and the result is displayed on the screen.

  When measuring the balance, as shown in FIG. 4, the cam surface of the support member 6 is rotated and brought into contact with the protrusion 61, and the action plate 2 is supported by the support member 6. The product of the distance from the grip end to the protrusion 61 (for example, 14 inches) and the weight value measured by the load cell 4 can be calculated by the CPU unit.

  When obtaining the natural frequency, as shown in FIG. 5, the support plate of the support member 6 is released, the movable clamp member 32 is rotated, and the gripper is gripped by the clamper composed of the fixed clamp member 31 and the movable clamp member 32. G is gripped. At this time, since the fixed clamp member 31 is pushed downward by the movable clamp member 32, the action plate 2 is also pushed downward. As a result, the load cell 4 is tilted by the action of the tilting portion 41, so that it slightly rotates. And as shown in FIG. 6, the lower end of the support | pillar 33 contact | abuts to the clamp support stand 12, and the clamp support stand 12 works as a stopper. Further, when the grip G is gripped, the golf club GC tilts, but when the grippers are gripped vigorously by the two sets of clampers, the golf club GC tilts rapidly, and the reaction causes the shaft S of the golf club GC to vibrate simply. If a slight time difference of about 0.1 to 0.8 seconds is given to the timing when the two sets of clampers hold, simple vibration can be made more efficiently.

  When the shaft S of the golf club GC makes a single vibration, the vibration is transmitted to the action plate 2 via the O-ring 34. Then, the load cell 4 detects the vibration of the working plate 2 and outputs a signal. For this signal, for example, digital waveform data measured through the same circuit as the weight measurement described above is subjected to waveform analysis such as Fourier transformation by the CPU unit, and the result is displayed on the screen to obtain the natural frequency. be able to. Alternatively, the natural frequency can be obtained by using a comparator circuit, directly converting a waveform based on the output signal of the load cello 4 into a pulse wave, and counting by the CPU unit.

  In this way, it is possible to quickly obtain the weight, balance and natural frequency of the club GC with a simple operation using a single device. Since the natural frequency is obtained using a load cell without using a phototube or stroboscope, one circuit board is sufficient regardless of the measurement of three characteristic values. You can go down. In addition, the load cell can detect minute displacements efficiently and accurately measure them, and can be miniaturized and manufactured at low cost.

It is explanatory drawing which shows the state which is measuring the weight. It is sectional drawing in the A line of FIG. It is an enlarged view of a clamper part. It is explanatory drawing which shows the state which is measuring the balance. It is explanatory drawing which shows the state which is measuring the natural frequency. It is an enlarged view of the clamper part in the state which is measuring the natural frequency.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 12 Clamp support stand 2 Action plate 21 Club pressing pin 31 Fixed clamp member 32 Movable clamp member 33 Post 34 O-ring 4 Load cell 5 Support point 51 Stopper 6 Support member

Claims (3)

One end of the action plate disposed horizontally at the top of the base is tiltably mounted via a fulcrum tiltably arranged load cell on the base, the other end of the action plate, the upper A clamper composed of a movable clamp member and a lower fixed clamp member is disposed, and a support column extending downward and inserted into a through hole of the action plate is fixed to the lower surface of the fixed clamp member, When an O-ring made of a soft elastic portion is arranged and the clamper does not grip the golf club, the fixed clamp member is placed on the action plate via the O-ring, and the action plate is placed at a predetermined reference position of the action plate. Supported by a support member that can be unsupported,
The golf club is supported in a horizontal posture by a club pressing pin formed on the fixed clamp member and the other end of the action plate, and the output signal of the load cell in a state where the action plate support of the support member is released Measure the weight of the golf club,
The balance of the golf club is measured by the output signal of the load cell in a state where the support member supports the action plate,
When the movable clamp member of the clamper is rotated and cooperates with the fixed clamp member to grip the golf club in the state where the action plate support of the support member is released, the fixed clamp member is lowered slightly through the O-ring. When the action plate is tilted, the lower end of the support column of the fixed clamp member comes into contact with the clamp support base disposed on the base to hold the clamper , and in this state, when the vibration is applied to the shaft of the golf club, A golf club measuring apparatus, wherein the vibration is transmitted to the action plate via the O-ring, and the natural frequency of the golf club is measured by an output signal of the load cell due to the vibration of the action plate. 2. A golf club measurement according to claim 1, wherein two sets of clampers comprising the fixed clamp member and the movable clamp member are arranged, and the golf club shaft is vibrated by vibration when the golf club is gripped by the clamper. apparatus. 3. The golf club measuring device according to claim 2, wherein a time difference is provided in timing when the two sets of clampers hold the golf club.

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