JP3013291B2 - Jig for golf club shaft cutting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a jig for cutting a shaft of a golf club. This jig is used when trimming the shaft in order to adjust the weight balance of the golf club at the time of hitting and the degree of bending of the shaft.

[0002]

2. Description of the Related Art When a golf goods store or a user himself assembles a golf club, a purchased shaft may be cut off according to the height and physical strength of the user.
This cutting operation can be performed with a hand tool such as a metal saw or a file, but it requires a long time for cutting and has a poor finish. In some cases, it is cut with a steel cutter or the like to save time.

[0003]

The cutting amount of the shaft differs for each user, and a high cutting accuracy is required. For this reason, when cutting using a disk cutter for iron work, it is necessary to mark the part to be cut and accurately position and fix the shaft so that the mark position matches the passing position of the disk. Preparation work is troublesome. In addition to the large surface roughness of the cut surface, there are disadvantages that burrs are likely to be generated on the cutting edge, that shaping after cutting is not omitted, and that the shaft surface is liable to be scratched by clamping. A shaft made of a fiber-reinforced composite material such as a carbon shaft is difficult to cut, and a reinforcing fiber may be wound from a cut portion to cause damage to the shaft surface.

[0004] For example, a cutting disk for precision cutting having a thickness of about 1 mm is commercially available. When the cutting disk is mounted on a drive shaft of a grinder for cutting, the surface roughness of the cut surface can be reduced, and burrs can be formed. Occurrence can be suppressed. Cutting of the carbon shaft can be performed without any trouble. The problem is that since the cutting disk is thin and easily bent, the disk is apt to be broken by a slight run-out of the shaft during cutting, so that manual cutting is very dangerous and the cost of replacing the disk is high. The inability to cut the shaft in the horizontal position of the cutting disk also contributes to the failure to cut.

An object of the present invention is to provide a shaft cutting jig which can cut various shafts for golf clubs accurately and quickly. Another object of the present invention is to provide a shaft cutting jig suitable for cutting a shaft using a thin cutting disk for precision cutting.

[0006]

A jig for cutting a shaft according to the present invention comprises a base 1 and a horizontally-long horizontally-oriented pedestal 4 which is supported on the base 1 via an arm 3 so as to be able to move back and forth. Have. The receiving table 4 is provided with a receiving groove 13 for supporting the peripheral surface of the shaft S along the longitudinal direction. A disk groove 14 for allowing the cutting disk D to enter and exit is formed in a longitudinally intermediate portion of the receiving table 4.
It is provided in a state orthogonal to the receiving groove 13. On the left and right sides of the disk groove 14, the main body 15 and the cut end 16 of the shaft S are
A first clamp 5 and a second clamp 6 which are respectively held and fixed together with the receiving groove 13 are arranged. Facing the receiving groove 13 that supports the cut end 16, there is provided a cut display 33 that indicates the cut length from the end of the shaft S to the disk groove 14.

Specifically, the arm 3 is supported so as to be able to swing back and forth about a horizontal shaft 2 provided on the base 1. Stoppers 9 and 10 are provided between the arm 3 and the base 1 to define the swing limit of the receiving table 4. The first clamp 5 for holding the main body 15 of the shaft S is provided with a receiving groove 13 on the front surface of the arm 3.
A clamp body 17 disposed in a state facing the arm 3, a clamp screw 18 screwed into the clamp body 17 from the back side of the arm 3 to pull the clamp body 17 toward the receiving groove 13, an arm 3 and the clamp body 17. And a spring 19 for urging the clamp body 17 to move away from the receiving groove 13. The second clamp 6 for holding the cut end 16 of the shaft S is provided with a clamp arm 28 supported by a bracket 26 provided on the receiving base 4 via a shaft 27 so as to be able to swing back and forth, and the clamp arm 28 is inserted into the receiving groove 13. The spring 29 includes a spring 29 that is urged to rotate toward the front, and an operation rod 30 that is fixed to the clamp arm 28 and protrudes toward the rear side of the receiving table 4.

[0008]

The jig for shaft cutting uses the base 1 fixed so that the receiving groove 13 is perpendicular to the rotation plane of the cutting disk D and the cutting disk D can enter the disk groove 14 without any trouble. The shaft S is mounted in a receiving groove 13 provided in the receiving base 4. At this time, referring to the cutting display 33, the shaft S
Is positioned at a display position that matches the dimension to be cut, and the shaft S is clamped and fixed by the first and second clamps 5 and 6. Thereafter, the receiving table 4 is fed toward the cutting disk D to cut the shaft S.

The cutting position of the shaft S can be specified in accordance with the cutting display 33 provided on the receiving table 4 with reference to the disk groove 14, so that the shaft S can be cut down accurately, and the cutting position is measured and a mark is formed. Positioning can be performed easily without the need for application or the like. By operating the cradle 4 previously positioned with respect to the cutting disk D, the shaft S
Since there is no room for center runout during cutting, the shaft S can be properly fed. Since the shaft S is clamped and fixed to the receiving table 4 by the first and second clamps 5 and 6, it is possible to concentrate on adjusting the feed amount of the receiving table 4 while monitoring the cutting state of the shaft S at the time of cutting. it can.

[0010]

【Example】

(Embodiment 1) FIGS. 1 to 5 show Embodiment 1 of a shaft cutting jig according to the present invention. In FIG. 1, a shaft cutting jig includes a base 1, an arm 3 supported by a shaft 2 provided on the base 1 so as to be able to swing back and forth, and a horizontally and horizontally long receiving base 4 fixed to the upper end of the arm 3. And the first provided on the left and right of the cradle 4
It comprises a clamp 5, a second clamp 6, and the like.

An inverted gate-shaped bearing frame 7 is erected on the upper surface of the base 1, and the shaft 2 is horizontally supported by upper left and right arms of the frame 7. Stoppers 9 and 10 are provided between the arm 3 and the base 1 in order to define the forward and backward swing limits of the arm 3 and the receiving table 4.
Is provided. The former stopper 9 is formed by utilizing the front corner of the lower end of the arm 3, which comes into contact with the bottom surface of the concave portion of the bearing frame 7, and defines the forward tilt limit of the arm 3. The latter stopper 10 is composed of a bolt screwed into the upper surface of the base 1 behind the bearing frame 7, and by adjusting the screwing amount, the rearward tilt limit of the arm 3 can be changed within a certain range. 10a is a lock nut.

The pedestal 4 is made of a rectangular rod made of a metal such as aluminum, copper, copper alloy or the like, or a plastic material, and a lower corner on the back side thereof is cut out at the upper end of the arm 3 as shown in FIG. The bolt 12 is joined to the receiving portion 3a.
To integrate with the arm 3. Near the lower front edge of the cradle 4,
A receiving groove 13 having a triangular cross section is formed horizontally along the longitudinal direction. The receiving groove 13 receives and supports the shaft S to be cut.

As shown in FIG. 1 and FIG. 3, a disk groove 14 orthogonal to the receiving groove 13 is formed in the center of the receiving base 4 in the left and right center so as to cross the front surface of the receiving base 4 up and down. Disk groove 1
4 has a groove width exceeding the thickness dimension of the cutting disk D for precision cutting, and is formed so that the groove bottom reaches the vicinity of the groove bottom of the receiving groove 13. In this embodiment, when the thickness of the cutting disk D is 0.5 mm, the groove width of the disk groove 14 is 1 mm. Although the groove width of the disk groove 14 can be set to an arbitrary amount of 1 mm or more, it is preferable that the groove width be as small as possible in order to support the shaft S near the cutting disk D. On the left and right sides of the disk groove 14, the main body 1 of the shaft S
A first clamp 5 for fixing the cutting end 5 and a second clamp 6 for fixing the cut end 16 of the shaft S are arranged.

In FIG. 2, the first clamp 5 is
Of the clamp body 17 and the clamp body 1
7 for pulling 7 toward the receiving groove 13
And a compression coil spring 19 for urging the clamp body 17 to move away from the receiving groove 13. Arm 3
Is provided with a screw hole for the clamp screw 18. The clamp body 17 is formed of an L-shaped metal block in side view,
A spring receiving hole 20 for accommodating the spring 19 and a screw hole 21 are provided on the inner surface of the base, and a clamp wall 22 facing the receiving groove 13 is protruded from the upper front surface of the base. The clamp screw 18 includes a screw shaft and a grip 23 fixed to a rear end of the screw shaft.
The screw shaft is inserted from the back side of the arm 3 into the screw hole and screwed into the screw hole 21 of the clamp body 17. The spring 19 is arranged between the front surface of the arm 3 and the spring receiving hole 20. As a result, the front end of the grip 23 is always in contact with the back surface of the arm 3, and when the clamp screw 18 is loosened, the clamp body 17 separates from the receiving groove 13 by that much.

In FIGS. 3 and 5, the second clamp 6 is used.
A bracket 26 having a U-shaped concave portion fixed at the lower end of the cradle 4 with bolts 25, a shaft 27 horizontally supported by the bracket 26, a clamp arm 28 swinging back and forth around the shaft 27, 27 is externally fitted to one side of the clamp arm 28
A spring 29 in the form of a torsion coil for urging the rotation toward the receiving groove 13, and an operation rod 30 fixed to the lower end of the clamp arm 28. The clamp arm 28 is formed of an L-shaped metal block in a side view, and has a clamp wall 31 facing the receiving groove 13 at an upper portion thereof. The side surface of the clamp wall 31 is provided so as to be close to the disk groove 14. Cut end 16 after cutting
This is for surely preventing the cut surface on the side from floating, and also to prevent the later-described cut display 33 from being hidden by the clamp wall 31. The second clamp 6 can temporarily fix the shaft S mounted in the receiving groove 13 immediately, and can open the clamp arm 28 by pulling the operation rod 30 upward as shown by the imaginary line in FIG.

In order to accurately position the cutting position of the shaft S mounted on the receiving groove 13, a cutting indicator 33 is provided facing the receiving groove 13 supporting the cutting end 16. As shown in FIG. 3, the cutting display 33 is provided by using the front wall of the receiving table 4 above the receiving groove 13. Is attached to a nameplate-like sheet on which is printed. Scale line is disk groove 14
, And the dimension numbers are increased as the distance from the disk groove 14 increases. This allows
Only by aligning the end face of the shaft S mounted in the receiving groove 13 with a graduation line matching the dimension to be cut, the cut-off dimension can be accurately positioned. At the time of positioning the shaft, the user sees the cutting display 33 from behind the jig, so the dimensional figures are displayed upside down.

At the time of cutting the shaft, the receiving table 4 and the arm 3 are tilted forward about the shaft 2 as shown in FIG. A grip 34 is provided on the back of the cradle 4 in order to perform the feeding operation of the cradle 4 more safely. The pedestal 4 may swing back and forth and left and right due to slight backlash of the shaft 2 during long-term use. In such a case, the grip 34 is required to be able to feed the pedestal 4 as properly as possible.
Are provided near the back surface of the disk groove 14. Thereby, the operation stick 30 can be pulled and operated with the finger of the hand on the side of operating the grip 34.

The shaft cutting jig is used with the disk groove 14 positioned with respect to the cutting disk D.
More specifically, as shown in FIG. 4, when the arm 3 is substantially upright, the center of the receiving groove 13 is located just beside the peripheral edge of the cutting disk D, and the base of the receiving disk 13 can enter and exit the disk groove 14 without hindrance. 1 is fixed, and a plurality of peripheral portions of the base 1 are fixed with cap bolts 35.

The shaft S is loaded into the receiving groove 13 in a state where the receiving table 4 is inclined backward and the clamp screw 18 of the first clamp 5 is loosened. Thereafter, the end of the shaft S is positioned in accordance with the cutting indication 33 in the manner described above.
Temporarily fix with. Next, the clamp screw 18 is tightened to draw the clamp body 17 against the spring 19, and the clamp wall 22 is brought into contact with the shaft S to clamp and fix the shaft S.

After turning on the start switch of the grinder to rotate the cutting disc D, the grip 34 is gripped to tilt the receiving table 4 and the arm 3 forward about the shaft 2 to move the shaft S to the cutting disc D. Gradually into the rotation locus of. At this time, the shaft S is horizontally clamped and fixed by the receiving groove 13 and the left and right clamps 5 and 6.
Swings back and forth about the horizontal shaft 2, so that the shaft S can be fed without any runout, and the cutting disc D
Can be reliably prevented from being broken by an external force acting in the thickness direction. Since the thickness of the cutting disk D is as thin as 0.5 mm, the amount of cutting chips generated during cutting can be suppressed to a very small amount, and the working environment can be minimized from being stained with cutting chips. When the cutting is completed, the receiving table 4 is tilted backward to retreat outside the rotation locus of the cutting disk D, and the grinder is stopped. After this,
Loosen the clamp screw 18 and further release the clamp arm 28 so that the main body 15 and the cut end 16 of the shaft S
Remove from 3.

Since the cutting disk D for precision cutting has small cutting abrasive grains, the surface roughness of the cut surface is sufficiently small, and no burrs are formed on the periphery of the cut surface. There is no. Composite materials such as carbon shafts can also be cut without problems.

The present invention can be implemented by partially changing the above embodiment as follows. A protection piece for preventing the peripheral surface of the shaft from being damaged is attached and fixed to each of the contact surfaces of the clamp walls 22 and 31 of the first and second clamps 5 and 6 with the shaft S. The protective piece can be formed of a fiber mass such as rubber, plastic, leather, or felt. The cross-sectional shape of the receiving groove 13 can be changed to a circular shape, a trapezoidal shape, or the like. The second clamp 6 can be arranged such that its shaft 27 is arranged on the upper surface side of the pedestal 4 and the clamp wall 31 projects from the upper end of the pedestal 4 toward the lower end side. The first clamp 5 can have the same structure as the second clamp 6.

The arm 3 can be automatically oscillated rearward while the arm 3 is urged to swing backward by a spring to release the feed operation force of the receiving table 4. In preparation for the case where the cutting length of several shafts S is constant, a positioning stopper for contacting and supporting the end surface of the shaft S can be provided on the receiving table 4. This positioning stopper is mounted on the pedestal 4
Can slide along the groove or rail provided in the
It can be fixed at any slide position with screws or the like. The receiving table 4 can be supported by the plurality of arms 3 so as to be able to move in parallel. That is, the plurality of arms 3 form a parallel link. The arm 3 can be guided and supported by a guide groove or guide protrusion provided on the base 1 so that only the forward and backward movements can be performed, and the shaft 3 can be cut by sliding the arm 3 and the receiving base 4 fixed thereto forward and backward.

As shown in FIGS. 6 to 10, a shaft cutting jig according to the present invention is a jig for cutting a shaft tip portion or a grip side end portion. A cradle 4 is swingably connected by a shaft 2 and fixed to an arm 3. The receiving table 4 is provided with a receiving groove 13 parallel to the shaft 2 for stably fixing the shaft S and a grip 34 for preventing danger. In order to cut the shaft S against the cutting disk D, the pedestal 4 is moved with the shaft 2 as a fulcrum and cut. A cutting display 33 for making the cutting precision high is engraved on the cradle 4, or a scale-like seal or a measure is attached. A first clamp 5 for fixing the shaft S and a second clamp 6 for fixing chips after cutting the shaft are provided. The first ramp 5 and the second clamp 6 have springs for facilitating attachment and detachment of the shaft S.

In the shaft cutting jig shown in FIGS. 6 to 10, the stoppers 9 and 10 in the above embodiment are omitted, and the arm 3 is moved from the substantially horizontal rearwardly inclined posture shown in FIG. The swing displacement can be made between the forwardly inclined posture rotated forward by about 180 degrees.

[0026]

According to the jig for cutting a shaft of the present invention, the shaft S is horizontally supported by the receiving groove 13 and accurately positioned by the cutting display 33 provided on the receiving table 4, and then the first and second shafts are set.
The shaft S can be properly held and fixed by being clamped and fixed by the clamps 5 and 6. Further, the pedestal 4 is supported by the base 1 via the arm 3 so as to be able to move back and forth, so that the shaft S together with the pedestal 4 does not run out toward the cutting disk D,
It can be properly fed and cut. Therefore, when the golf club shaft S is cut using the shaft cutting jig of the present invention, the shaft S can be cut accurately and quickly, and the thin cutting disk D for precision cutting can be cut.
, Various shafts S such as a metal shaft or a composite shaft such as a carbon shaft can be cut lightly and safely in a good finished state.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a shaft cutting jig.

FIG. 2 is a side view of a jig for cutting a shaft.

FIG. 3 is a view taken along line AA in FIG. 2;

FIG. 4 is a side view showing a cut state of the shaft.

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is a schematic side view of a jig for cutting a shaft.

FIG. 7 is a front view of a shaft cutting jig.

FIG. 8 is a plan view of a jig for cutting a shaft.

9 is a sectional view taken along line CC in FIG. 7;

FIG. 10 is a sectional view taken along line DD in FIG. 8;

[Explanation of symbols]

 Reference Signs List 1 base 2 axis 3 arm 4 receiving base 5 first clamp 6 second clamp 13 receiving groove 14 disk groove D cutting disk S shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-28536 (JP, A) JP-A-61-103742 (JP, A) JP-A-53-85764 (JP, A) 131321 (JP, U) Japanese Utility Model Hei 3-7437 (JP, U) Japanese Utility Model Hei 3-22839 (JP, U) Japanese Utility Model Utility Model Hei 3-2796 (JP, Y2) Tokuyohei Hei 2-501723 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23Q 3/06 B23D 33/02

Claims (2)

(57) [Claims] 1. A base 1 and a base 1.Horizontal axis 2
An arm 3 supported pivotably about the center,
Fixed to the upper end ofIt has a horizontally long cradle 4The swing limit of the cradle 4 is defined between the arm 3 and the base 1.
Stoppers 9 and 10 are provided,  A receiving groove 13 for supporting the peripheral surface of the shaft S is formed in the receiving table 4.
The cutting disk D is inserted and removed in the middle of the receiving table 4 in the longitudinal direction.
Allowable disk groove 14 is provided in a state perpendicular to receiving groove 13
The main body 15 of the shaft S and the
And the cut ends 16 are clamped together with the respective receiving grooves 13.
The first clamp 5 and the second clamp 6
Facing the receiving groove 13 supporting the cut end portion 16, the shaft S
Indicating the cutting length from the end of the disc to the disc groove 14
Disconnection indication 33To the cradle 4Golf club chassis
Jig for cutting the foot. (2)A base 1 and an arm 3 with respect to the base 1
And a horizontally long cradle 4 that is supported so that it can be displaced back and forth.
And A receiving groove 13 for supporting the peripheral surface of the shaft S is formed in the receiving table 4.
Is provided along the direction, At the middle part of the cradle 4 in the longitudinal direction,
Allowable disk groove 14 is provided in a state perpendicular to receiving groove 13
Has been On the left and right sides of the disk groove 14, the main body 15 of the shaft S and
And the cut ends 16 are clamped together with the respective receiving grooves 13.
The first clamp 5 and the second clamp 6
And The first clamp 5 for holding the main body 15 of the shaft S,
A clamp arranged on the front surface of the arm 3 so as to face the receiving groove 13.
Lamp body 17 and clamp body from the back side of arm 3
17, and the clamp body 17 is placed on the side of the receiving groove 13.
Screw 18 for pulling the arm 3
It is arranged between the lamp body 17 and Lamp body 17
19 that moves and urges the groove away from the receiving groove 13
, Second clamp 6 for holding cut end 16 of shaft S
However, the bracket 26 provided on the receiving table 4 is
Clamp arm 28 supported swingably back and clamp arm 2
A spring 29 for urging the rotating shaft 8 toward the receiving groove 13;
Is fixed to the pump arm 28 and protrudes toward the rear side of the cradle 4.
Operation stick 30 The shaft S faces the receiving groove 13 supporting the cut end 16.
Indicating the cutting length from the end of the disc to the disc groove 14
The disconnection indication 33 is displayed on the golf club
Jig for cutting the foot.