JP2021094401A - Double fastening device for iron head and shaft - Google Patents

Abstract

To provide a double fastening device for an iron head and a shaft, the double fastening device improving stability and being conveniently processable.SOLUTION: A double fastening device for an iron head 10 and a shaft 30 includes: a lower end nut part formed inside a hosel 11 of the iron head 10; a sleeve 20 to be held by the hosel 11, the sleeve provided on the shaft 30; and a lower end bolt part to be fastened to the lower end nut part, the lower end bolt part formed on the sleeve 20. An upper end of the hosel 11 is configured to protrude more than a top surface of the sleeve 20 in a state in which the lower end bolt part of the sleeve 20 is fastened to the lower end nut part of the hosel 11. On an inner peripheral surface of the upper end of the hosel 11, an upper end nut part is formed apart from the top surface of the sleeve 20. An upper end bolt part to be fastened to the upper end nut part to press the top surface of the sleeve 20 is provided to inhibit the sleeve 20 from being removed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a double fastening device for an iron head and a shaft, and more specifically, the head and the shaft are easily replaced by a screw fastening method. By allowing the spine) and grip positions to be swapped in the desired direction, head separation is prevented during the swing process, shaft consistency is maintained, and the screw fastening method is convenient for machining. Regarding a double fastening device for an iron head and a shaft.

Generally, iron clubs have several types of iron clubs when custom-made clubs at a fitting shop because the end of the shaft is fixed to the hosel of the head with an adhesive such as epoxy. It had to be prepared, and there were difficulties such as the cost aspect and the need to secure a storage place. At the fitting shop, most of the test hits are made with a 7-iron, but the type of head varies from manufacturer to manufacturer, and the shaft also varies depending on the material, strength, and weight, so all of these types should be prepared in combination. Was difficult.

In view of this, there is Roark's Patent Document 1 relating to an interchangeable golf club head and an adjustable handle system (Interchangeable Golf Club Head and Adjustable Handle System). Roark's patent discloses a golf club with a quick release device to separate the club head from the shaft. The quick release device is a two-part connector having a lower connector fixed to the hosel of the club head and an upper connector fixed to the lower part of the shaft. The upper connector comprises a pin and a ball catch that radiate outward from the lower end of the upper connector. The upper end of the lower connector comprises a slot formed to accommodate the pins of the upper connector and a separation hole for accommodating the ball catch. When the shaft is coupled to the club head, the lower connector hole holds the ball catch to secure the shaft to the club head.

However, Roark's patent is practical because the lower and upper connectors are matingly coupled through the pin and ball catch, but the pin can break or the ball catch can come off the separation hole during the swing process. There was a problem of inferiority.

There is Patent Document 2 of Callaway Golf Company regarding a golf club provided with a replaceable head shaft connecting device. Callaway's patents are attached to the club head, a tube attached to the club head, a shaft having a tip end removably attached to the club head tube, and the shaft and the tip of the shaft. It comprises a sleeve disposed between the tubes and a mechanical fastener that removably secures the sleeve to the tube, the tube comprising an upper end having an inner diameter even larger than the inner diameter of the lower end. The anti-rotation portion has a tapered portion and an anti-rotation portion, the anti-rotation portion forms a key groove having a non-circular shape, the lower portion of the sleeve has a conical portion and a wedge portion, and the conical portion has a length of the lower portion. The key is extended by a minimum of 1/4 and is housed in the tapered portion of the tube, the wedge portion is housed in the anti-rotation portion of the tube, and the key is housed to prevent the shaft from rotating with respect to the club head. It has an external shape that complements the shape of the groove.

However, such Callaway patents have to form a non-circular keyway inside the tube and a wedge on the outer peripheral surface of the sleeve to prevent twisting of the shaft and head. There was a problem of being inferior in sex. In particular, when the tube is manufactured integrally with the head, it takes a lot of time to precisely machine a large number of keyways, and in order to form a taper, the tube is the axis of rotation of a machine tool such as a drill machine. There is a problem that a jig device for fixing the head is required so as to be in a straight line with the head.

In view of the conventional problems, the present inventor has proposed an iron club fitting device in Korean Patent No. 1851986.

U.S. Pat. No. 6,547,673 Republic of Korea Published Patent No. 2007-0085375 Republic of Korea Patent No. 1851986

The present invention is an improvement of the patent of the present inventor, and an object of the present invention is that the head and the shaft are easily replaced by a screw fastening method, but the lower part and the upper part are double-fastened and the shaft. By allowing the spine and grip positions to be swapped in the desired direction during the swing process, head separation is prevented, shaft consistency is maintained, and the screw fastening method makes machining convenient. The purpose is to provide a double fastening device for an iron head and a shaft.

Therefore, in the present invention, the lower end nut portion is formed inside the hosel of the iron head, the shaft is provided with a sleeve sandwiched between the hosel, and the sleeve has the lower end bolt portion fastened to the lower end nut portion. In the iron head and shaft double fastening device in which the above is formed, the upper end of the hosel is further projected from the upper surface of the sleeve in a state where the lower end bolt portion of the sleeve is fastened to the lower end nut portion of the hosel. An upper end nut portion is formed on the inner peripheral surface of the upper end of the hosel apart from the upper surface of the sleeve, and an upper end bolt portion that is fastened to the upper end nut portion and presses the upper surface of the sleeve is provided. , The sleeve is prevented from coming off.

According to the present invention, the sleeve is assembled by being sandwiched inside the hosel of the iron club head in a retractable manner while the sleeve is fixed to the end of the shaft with an adhesive such as epoxy. It is convenient to replace the iron head. In particular, since the sleeve is a method in which screws are concentrically formed at the lower end and fastened to the screws inside the head, the inconvenience of processing is eliminated as compared with the conventional method of forming and fitting eccentric protrusions. ..

That is, in the case of the screw fastening method, since it is sufficient to thread the holes of the sleeve and the head, it can be manufactured using a general processing machine, but conventionally, in the case of an eccentric protrusion, a special machine such as milling is used. Moreover, since it is composed of a square and an eccentric circle, there is a problem that it cannot be assembled if a fitting tolerance occurs.

In the present invention, since it is sufficient to process protrusions and holes concentrically on the sleeve and the head, no assembly tolerance is generated, and since the upper and lower parts of the sleeve are screwed together, even if the sleeve is removed, the upper side is upper. Since the sleeve is pressed by the screw fastening portion, there are advantages such as the sleeve and the shaft being suppressed from coming off and the safety being improved.

Further, due to the manufacturing characteristics of the shaft, a spine having an eccentric cross section is formed, but there is a problem that the position of the spine changes according to the screw fastening amount. That is, in the threaded portion formed on the sleeve and the hosel, it is difficult to adjust the spine position to a desired position for each shaft even if the amount of rotation of the thread is constant during the machining process, and in particular, the grip at the upper end of the shaft. There is a problem that it is difficult to adjust the position of.

In order to solve such a problem, the present invention is provided with a large number of adjusting rings in which the pitch of the thread is divided at equal intervals, and the spine and the grip are provided with the shaft fastened to the hosel. If is not placed in the specified position, the spine and grip can be adjusted to the desired position by sandwiching the adjustment ring between the shaft and the hosel by the required number and changing the fastening amount of the shaft. Therefore, there are advantages such as maintaining the consistency of the shaft and improving the reliability of the product.

It is a perspective view which shows the iron club which concerns on one Example of this invention. It is a separation perspective view of the upper end bolt part and a sleeve which concerns on one Example of this invention. It is a separated sectional view of the head and the shaft which concerns on one Example of this invention. It is an assembly sectional view of the head and the shaft which concerns on one Example of this invention. It is sectional drawing which shows the alignment process of the spine of the shaft which concerns on one Example of this invention.

As shown in FIGS. 1 to 5, the fastening device according to the embodiment of the present invention includes a sleeve 20 sandwiched inside a hosel 11 provided on the heel 12 side of the iron head 10.

The sleeve 20 has a hollow cylindrical shape, and the end portion of the shaft 30 is sandwiched inside and fixed by an epoxy adhesive. Since the hosel 11 has an inner diameter that allows the sleeve 20 to enter and exit, a small tolerance is generated between the hosel 11 and the sleeve 20. The hosel 11 is manufactured in advance so as to have an inner diameter in which the sleeve 20 is sandwiched, or the hosel 11 of the head 10 made in advance is enlarged so that the sleeve 20 is sandwiched.

A lower end bolt portion 21 is provided on the outer peripheral surface of the lower end of the sleeve 20, and the lower end bolt portion 21 has a thread formed with a diameter smaller than the outer diameter of the sleeve 20 and is inside the hosel 11. , A lower end nut portion 12 to which the lower end bolt portion 21 is fastened is provided. The lower end bolt portion 21 and the lower end nut portion 12 are machined with a left-handed screw, but when a right-handed person swings and the head 10 hits a ball, the head 10 receives a force from the left, so a left-handed screw method is used. Loosening of the screws is prevented only by fastening the screws.

At the boundary where the lower end bolt portion 21 and the sleeve 20 meet, a ring holding portion 22 in which the thread of the lower end bolt portion 21 is not formed is formed, but the outer diameter of the ring holding portion 22 is said to be the same. The ring pressing portion 23 is formed at the lower end of the sleeve 20 so as to be larger than the screw thread and orthogonal to the ring holding portion 22. Further, inside the hosel 11, a ring receiving portion 14 corresponding to the ring pressing portion 23 is provided at the upper end of the lower end nut portion 12, and a large number of adjusting rings 50 are fastened to the ring holding portion 22. It is engaged by a fitting type and is arranged between the ring pressing portion 23 and the ring receiving portion 14.

The adjusting ring 50 is formed in a hollow shape, and the inner diameter is formed to be smaller than or equal to the outer diameter of the ring holding portion 22, and the adjusting ring 50 is sandwiched between the ring holding portions 22 in a tightening type. , Hard to separate. Further, the adjusting ring 50 has a thickness of 1/10 of the pitch (Pich: P) of the lower end bolt portion 21 and the lower end nut portion 12. If the distance between the threads is 1 mm pitch, the adjustment ring 50 has a thickness of 0.1 mm, so that the lower end bolt portion 21 is rotationally adjusted at 36 degree intervals per adjustment ring 50. .. Each adjustment ring 50 may be formed to have a thickness that divides one rotation of the lower end bolt portion 21 at intervals of 36 degrees or less. If the rotation interval needs to be further subdivided, the thickness may be 1/12, 1/15 and 1/18 and adjusted at intervals of 30 degrees, 24 degrees and 20 degrees.

Spine 31 having a thickness deviation between the inner diameter and the outer diameter is formed in a straight line on the shaft 30 due to manufacturing characteristics, but it is further remarkably generated especially in the case of a shaft made of carbon graphite material. Further, although the grip 32 is fastened to the upper end of the shaft 30, in general, the center display of the spine 31 and the grip 32 are matched and the shaft 30 is adhered to the head 10, so that the consistency of the shaft 30 is maintained.

However, in the case of the method in which the shaft 30 and the head 10 are separated as in the present invention, depending on the fastening amount and the number of pitches of the screw portion between the lower end bolt portion 21 and the lower end nut portion 12 of the shaft 30 and the head 10. The position of the spine 31 of the shaft 30 will change. In particular, in a fitting shop, when many shafts 30 are alternately fastened to one head 10 to perform a swing test, the positions of the spine 31 and the grip 32 may change separately. This is because the sleeve 20 is adhesively fixed to the lower end of the shaft 30, so that the positions of the threads cannot be made uniform, and the lower end bolt portion 21 formed on the sleeve 20 is also formed in the thread during the manufacturing process. It occurs because the number of pitches and the amount of rotation change little by little. In particular, since the lower end nut portion 12 inside the hosel 11 is formed inside, it is more difficult to make the number of thread pitches and the amount of rotation uniform.

Therefore, if the adjusting ring 50 is sandwiched between the ring holding portions 22 and the amount of rotation of the shaft 30 is changed, the positions of the spine 31 and the grip 32 can always be kept constant. That is, in the absence of the adjusting ring 50, when the ring pressing portion 23 comes into contact with the ring receiving portion 14, the rotation of the shaft 30 stops, but at this time, the position of the spine 31 may not be the desired position. That is, the center of the spine 31 and the grip 32 may be twisted in both directions or bent backward. At this time, when a required number of adjustment rings 50 are sandwiched between the ring holding portions 22, the large number of adjusting rings 50 are arranged between the ring holding portion 22 and the ring receiving portion 14, so that the shaft 30 can be used. A change occurs in the amount of rotation, and the positions of the spine 31 and the grip 32 of the shaft 30 can be adjusted with an appropriate number of adjustment rings 50.

Further, the sleeve 20 is in a state where the upper end is inside the hosel 11, and an upper end nut portion 13 is formed above the upper end of the sleeve 20 on the inner peripheral surface of the upper end of the hosel 11. Further, an upper end bolt portion 40 to be fastened to the upper end nut portion 13 is provided.

A hollow through hole 41 sandwiched between the shafts 30 is formed in the upper end bolt portion 40, but the upper end bolt portion 40 is first attached to the shaft 30 before the sleeve 20 is adhered to the shaft 30. Sandwich. The upper end bolt portion 40 is provided with a head 42 arranged at the upper end of the hosel 11, and if the head 42 is tightened with a wrench and the upper end bolt portion 40 is fastened to the upper end nut portion 13. The bottom surface of the upper end bolt portion 40 is in close contact with the upper surface of the sleeve 20 to prevent the sleeve 20 from rising upward. Further, the upper end bolt portion 40 and the upper end nut portion 13 are composed of right-hand threads.

In one embodiment of the present invention configured as described above, a hollow hole in which the sleeve 20 is sandwiched is formed inside the hosel 11, and a lower end nut portion 12 is concentrically formed at the lower end of the hole. Therefore, the workability is more convenient than the conventional method of forming an eccentric protrusion or a single-shaped protrusion. Further, since the lower end bolt portion 21 to be fastened to the lower end nut portion 12 is formed on the sleeve 20, the lower end bolt portion is fastened by fastening the screw portion in the process of inserting the sleeve 20 into the hosel 11 and rotating the sleeve 20. 21 is fastened to the lower end nut portion 12. Further, the upper end bolt portion 40 is loosely sandwiched from the through hole 41 above the sleeve 20 in the shaft 30, and is provided so as to be movable in the axial direction.

Therefore, the lower end bolt portion 21 is fastened to the lower end nut portion 12, the sleeve 20 is fixed to the hosel 11, and then the upper end bolt portion 40 is fastened to the upper end nut portion 13, so that the bottom surface of the upper end bolt portion 40 is formed. The upper surface of the sleeve 20 is pressed.

Since the upper end bolt portion 40 is fastened to the upper end nut portion 13 of the hosel 11 in a state where the sleeve 20 is fastened to the hosel 11 through the lower end bolt portion 21 and the lower end nut portion 12, the sleeve 20 is doubled. It will be in a fastened state. Therefore, when the head 10 hits the ball in the swing process, the loosening of the screw fastening portion is prevented even if a force is received from the left side. Even if the lower end bolt portion 21 comes off from the lower end nut portion 12, the upper end bolt portion 40 is fastened to the hosel 11 and presses the upper surface of the sleeve 20, so that the sleeve 20 is suppressed from rising and stability is ensured. There is an advantage.

Further, if the shaft 30 is screwed to the hosel 11, the positions of the spine 31 and the grip 32 of the shaft 30 are changed. This occurs because the number of pitches and the amount of rotation cannot be made constant in the process of manufacturing the threads of the lower end bolt portion 21 and the lower end nut portion 12, but in the present invention, the ring holding portion at the lower end of the sleeve 20 Since a required number of adjustment rings 50 are sandwiched between the 22 and the distance between the ring pressing portion 23 and the ring receiving portion 14 is adjusted, the fixed position due to the rotation of the shaft 30 can be made constant. ..

The center display of the spine 31 and the grip 32 of the shaft 30 is usually located in the front center of the golfer. Therefore, if the adjustment ring 50 is appropriately adjusted in the process of fastening many shafts 30 to one head 10, the positions of the spine 31 and the grip 32 can be aligned with the front of the golfer.

Further, since a large number of adjusting rings 50 are sandwiched between the ring holding portions 22 by a tightening type and cannot be separated, if the shaft 30 is separated from the head 10, the hosel 11 is in a state where the adjusting rings 50 are coupled to the sleeve 20. Since it is separated from the above, there is no risk of losing the adjusting ring 50, and there is an advantage that it is not necessary to reset the number of adjusting rings 50 for each shaft 30.

10 Head 11 Hosel 12 Lower end nut part 13 Upper end nut part 14 Ring receiving part 20 Sleeve 21 Lower end bolt part 22 Ring holding part 23 Ring pressing part 30 Shaft 31 Spine 32 Grip 40 Upper end bolt part 41 Through hole 42 Head 50 Adjusting ring

Claims (1)

The lower end nut portion is formed inside the hosel of the iron head, the lower end bolt portion is formed on the sleeve sandwiched between the hosel, and the lower end bolt portion is fastened to the lower end nut portion of the hosel. An upper end nut portion is formed on the inner peripheral surface of the upper end apart from the upper surface of the sleeve, and an upper end bolt portion that is fastened to the upper end nut portion and presses the upper surface of the sleeve is provided to prevent the sleeve from coming off. In the double fastening device of the iron head and the shaft that was made to be suppressed,
A number of adjusting rings are provided that are sandwiched between the lower ends of the sleeve by the lower end bolts and that adjust the depth at which the sleeves are fastened to the hosel, each of which adjusts one revolution of the lower end bolt. Formed to a thickness that divides at intervals of 36 degrees or less, a large number are selectively laminated so that the spines and grips of the shaft match at a desired position.
At the boundary where the lower end bolt portion and the sleeve meet, a ring holding portion in which the thread of the lower end bolt portion is not formed is formed, but the outer diameter of the ring holding portion is larger than that of the thread. Formed,
A ring pressing portion is formed at the lower end of the sleeve so as to be orthogonal to the ring holding portion.
Inside the hosel, a ring receiving portion corresponding to the ring pressing portion is provided at the upper end of the lower end nut portion.
Double fastening of the iron head and the shaft, characterized in that a large number of adjusting rings are engaged with the ring holding portion in a tightening manner so as to be arranged between the ring pressing portion and the ring receiving portion. apparatus.

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