JPS5920181A - Golf club shaft made of fiber reinforced plastic - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fiber-reinforced gelastec (hereinafter referred to as FRP) golf club shaft (7) vC, and relates to a coil 2 club shaft with no variation in practical performance and feel. The golf club is i! 1 josha 2
(111%) VC response S (5t
There are classifications such as IFCL (abbreviation) and R (Regular), which golfers choose according to their own preferences.

C (The IJ classification is generally flexible, and its measurement is done by fixing the large diameter of the shaft (Butt) and measuring the diameter (
Tip) Lower the 9 to the GJ side and see that it is 2 from 4
The rex is determined.

(Fig. 1) Regarding flex, it is not desirable to have shafts with the same bending rigidity and the same deflection (J), for example,
In general VC, even if the same song has a rigidity, the deflection award varies, and it can be said that the smaller the deflection, the more stable the quality.

Golf club (/J Another c that determines the feeling
t) It is the kick point that is repeated several times.

The kick point is the second point when you bend the shaft! ll1 curve (given by provisional vt f (x)).

If the shafts are made of completely isotropic material, γ, then the flex is the same, f't'L(/, I, the kick point of the shaft is also at the same position 1/c. Even shafts with exactly the same μ flex are often used with different kick points. Characteristics vary greatly, but generally released in 1972.
No. 125140 (as disclosed, the winding angle is 10
0 layers and winding angle of 25° to 65°, preferably 45°
The F bend is stiffness and strength in the layer below 010°, and the torsion resistance in the 25° to 65° V) layer?
I'm accepting it. The way it was revealed in the past V (Gornshaft is classified as a large scale VCL with rigidity (2 rex). For layers from γtj 6 to 100 or less, the award differs depending on the shaft 0 classification VC. Therefore, the general VC is the outermost N4 age 10°
Adjust the following layers and their electricity. As shown in Fig. 2 (flexural modulus (Ez) is sieve strength carbon #?lI!1PJI
When all reinforcing fibers are used, carbon fiber C/) depends on the type, but in general, the weight is 8000 kg when the winding angle is 10° under VL.
/mm” or more.

Also, the strength r (as shown in Fig. 5 1fc, tL winding angle is 0°y
The closer e gets to t, the bigger /), so the intensity is more than 1o0T
(2) It is clear that it is more advantageous to use it as the outer layer of Vj'a minijunt. However, from Sha2tri2Ealing(t,)rkJ, the fact that a layer with significant bending elasticity exists in the outermost layer is disappointing. The golf club has a market price) p VC The beautiful appearance is a good choice for FRP
The surface of the shutter is polished and painted.Pull 2
Shea:) To Vt5r Rir Hh 〃o engineering can be expected to make a profit in VC trading power II Kotake r 枇i, and the tcotL is 2 rex, which is one of the reasons for the dispersion of feeling such as kick points. For example, the outermost layer VC elastic modulus + D, 000
In the case of a shunt using carbon fiber r, the outer diameter is φ12.kg/-. amm/mm inner diameter φ9.5 a+
When +n/mm is the standard diameter, the outer diameter φ is φl 2.
2 mn+/mrn″r, S iL has a bending rigidity of 11
% increase λ. On the other hand, φ11, t3 mm/mm
After Vc processing, it decreases by 10%. For M-long shafts like pull 2-shear 2-to, there is no obvious surface processing method for VC other than polishing, and in the case of 1νF polishing, ±0.2 nom / n+
+o The difference between the dimensions of the counterfeit PJA was 1 and 1 (/, 1 result, 2 Rex, 2 Kick Points, or Haratsugu).

The present invention and other situations 111 Most of the 2-irament finding method rcL suppresses the variation in flex in the FRPI4/shut 2, and increases the tL in the same 2-ray shaft 2. The goal is to provide consistent kick points and goals.

The object of the present invention is achieved by forming the outermost layer of the shaft, that is, a fiber-reinforced layer having an elastic modulus of 550 kg/- or less.

However, the misfire E! The suction of A is a fiber-reinforced glass golf club shaft made of at least two layers made by the filament winding method VL (2) V(,, &,
The outermost layer has a flexural modulus of 5,500 kg/dish 1 rJ:), and is the lower fiber-reinforced layer, and the inner layer in contact with the outermost layer VC is composed of a fiber-reinforced layer with a flexural modulus of 8,000 kg/- or less. Since the stiffening reinforced plastic Gol 2 crankshaft is bent at a pressure rate of 6500 kg/- or less, the VC may be made of low-strength fiber, but carbon fiber may be used.
° ~ 60 ° C/) @ Angle U D ゐゐ〇 and superacid t L 0 m before d pi as the inner layer placed on the outermost layer is at least 8001] kg/uml! It is necessary that the fiber reinforced layer has a bending modulus of more than 10°.
To wrap around the winding angle as follows: VL, r- is a clay formation
Ru. The flexural modulus of the outermost layer is 5500 kg/mn + 'Eku person @ Iig Hvt is 7 L'
The bend of the inner j- which is in contact with the outermost layer N is 5!1 with a degree of 73
1] L] Okg/- If the weight is small, VC is not suitable because the thickness of the shaft increases and the number of children increases as well.

Below is the uninvented Shifu/AI example V (Motosasara VC fraud wholesaler 11/
C. Clear your face.

Examples and Comparative Examples Charcoal fibers (Traca T500/6000) were placed on a core bar (mandrel) having a total length of 50 Qmm, a large diameter of 14.5 mm, and a small diameter of 4.5 mm. )
Soak the epoxy stool fat in the epoxy, and the valley angle is 10.
VC winding so that the shaft diameter is 6.5rnmVL i
Wrapped with ox. Next FCI port 14 request PC width angle 45° fine note 8. After spreading it with Qman's L1, tape the whole length with cellophane cheese etc., heat it to VL and remove it.
I studied it like that. 10 shots in exactly the same way? I checked the Tsuguri 2 Rex and Kick Point 1/J Haratsuki and found that the flex is μ ± 0.51nl11, and the kick point has a variation of ±1m111, and these 10 'l'
: When all (f''Jex*) balance golf clubs were tried out by advanced players, 10 of them were rated as having the same 2-eeling.

Please note that the variation in outer diameter dimensions is ±0.　I　mm.

As the following VC comparison 1, use the same mandrel VC as in the example.
First of all, carbon core impregnated with epoxy resin! A was made with a winding angle of 45°, width was set at a winding angle of 10°, and the width was omitted, and 710 shafts were made in the same way as the reli, and the flex O-parallel was ±1.5m, and the kick point was ±2.
．． 5mn bar 2 was given. The variation in the outsourced dimensions was ±0.11111+, which is the same as in the case of interpolation. This shaft is made of high grade Vt test shot and C and kick points are the two most different T &: I feeling 9 U Kona 9 grade is %l gloss 2 points and it is a bright feeling ring. ” I was disappointed. General V (±+ of flex, 51+1u (/J) The unevenness is the variation within the same grade with the Wf valley δI, in this case the kick point) (the Q unevenness has an influence on the feeling VC) In the example and comparative example, the outer layer has a bullet injection rate of I 500 kg/m with a force of 1.
10.000 Kg/+n+1 in e-shun province)
The size [(a with bread ± 0.1 proof) 2 The shadow ζl given to Ealing is human size 0.

9. In a golf club shaft made of fiber-reinforced plastic made from at least two layers, the outermost layer is Bending bullet 1f+'f-5500kg/
mn + - Since it is a reinforced layer of afternoon fibers, it has a large needle head movement instead of NIJ, and provides a stable golf club shunt with 2 rex rose points and kick points G'J rose points C/J71. I0 became DJ Noh.

[Brief explanation of drawings]

The first section is a conceptual diagram of club shaft deflection measurement, and the second section is a conceptual diagram of club shaft deflection measurement.
Figure 5 shows the relationship between the winding angle Q0, the longitudinal elastic modulus Ez, and the transverse elastic modulus E2 of the carbon fiber helical laminated material. Describe the strength relationship with a 7I\D graph. 1...Golf club shaft

Claims (1)

[Claims] 1. A fiber-reinforced glass nac golf club shaft made of at least two layers manufactured by the filament winding method, in which the outermost layer has a flexural modulus of 5500 kg.
A golf club shaft made of fiber-reinforced gelastec, characterized in that the inner layer in contact with the outermost layer is composed of a fiber-reinforced layer with a bending elasticity of 4S8000 kg/m or more.