JP5591593B2 - Grip structure of golf trial hitting device - Google Patents

Description

  The present invention relates to a grip structure for fixing a golf club to the golf trial hitting apparatus in a golf trial hitting apparatus that mechanically executes a test swing (trial hit) for performance evaluation of a golf club or the like.

  In order to evaluate the performance of golf clubs and golf balls, golf trial hitting devices that actually perform a test swing mechanically using the clubs and balls are known from Patent Documents 1 to 4. These known devices are designed not only to hit a golf ball, but also to swing more like a human.

  Specifically, in Patent Documents 1 and 2, a swing arm mechanism is constituted by a first arm corresponding to a human arm and a second arm corresponding to a wrist (hand), and these arms are arranged in the same direction. While rotating in conjunction with each other, the position of the rotation shaft is made different, and the rotation angle and the rotation speed are independently controlled by different drive motors, so that various club turning trajectory patterns can be executed. In addition, the second arm is provided with a twisting mechanism having a club shaft (shaft shaft) as a rotation axis, and is rotated by another drive motor, thereby enabling swinging imitating the turning of the wrist.

  Furthermore, the golf trial hitting device disclosed in Patent Document 3 is provided with a rotation driving unit in a part of the device body corresponding to the waist, and the rotation driving unit is reciprocally rotated by an oscillating drive or the like to measure the torque of the golf club. Is.

  In addition to the configurations of Patent Documents 1 and 2, Patent Document 4 discloses a golf trial hitting device provided with a striking force assisting mechanism that artificially swings the hips, as in Patent Document 3.

  On the other hand, Patent Document 5 discloses a club gripping device in a golf trial hitting device. This gripping device includes a pair of holders having saddle-shaped grooves, and by combining these holders, a through hole having a shape similar to the outer shape of a grip of a golf club is formed, and the grip is accommodated in the through hole. After that, the grip is held in a state where the outer surface is pressed against the inner wall of the through hole by pushing the grip end.

JP-A-9-149958 Patent No. 3285484 publication JP 2001-29516 A JP 2007-73003 A JP-A-11-169501

  By the way, in order to perform an accurate swing, one of the conditions is to hold the golf club correctly. In the case of a human, the grip is grasped by adjusting the arrangement / bending / force adjustment of both hands and fingers. However, it is difficult to mechanically accurately reproduce such a complicated grip, and even the purpose of the golf trial hitting device is not required.

  However, as shown in Patent Documents 1 to 4, in view of the development of golf trial hitting devices that perform swings closer to humans, the gripping means is also as close to human grip as possible. It is preferable.

  In this regard, the apparatus disclosed in Patent Document 5 is to hold the entire surface of the grip evenly by a pair of holders, but this is very different from the human gripping mode. In other words, humans hold the upper and lower two positions of the grip with both hands, whereas Patent Document 5 holds the entire grip or one place with the combined holding tool, and humans force each left and right hand and fingers. While the grip is held by adjusting the adjustment, the thing of patent document 5 is greatly different in that it becomes a so-called solid grip that grips the grip outer surface evenly. In the case of a human being, local deformation and stress concentration corresponding to the force of the hand or finger occur in the grip during the swing. However, in the gripping device of Patent Document 5, there is no such local deformation and stress concentration. Has been. Accordingly, when the test swing is performed by applying the gripping device of Patent Document 5 to the golf trial hitting device, in particular, the golf trial hitting device that performs a movement corresponding to the turning of the wrist or the swinging of the waist as in Patent Literatures 1 to 4. When applied, the grip will be subjected to deformations and stresses that are completely different from those when a person swings. Therefore, accurately evaluate the performance of golf clubs and grips designed for human use. May not be possible.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a grip structure of a golf trial hitting device that holds two positions of the grip with different chuck structures.

  In order to achieve the above object, in the present invention, a grip of a golf club is inserted into a cylindrical main body, and the grip is held by first and second chuck portions provided at two locations in the longitudinal direction of the cylindrical main body. Assuming that In addition, the cylindrical body has an insertion hole through which the grip can be inserted and removed at the center, and has male screw portions at two outer peripheral surfaces on the inlet side and the rear end side of the insertion hole. A tapered hole having a diameter reduced toward the rear end side is formed on the inner periphery on the inlet side, and a plurality of slits penetrating the insertion hole are formed around the rear end side.

  The first chuck portion includes a plurality of wedge members each having a tapered outer curved surface having the same inclination as the tapered hole and an arcuate inner curved surface that can be in close contact with the outer surface of the grip. And a cap nut that can be screwed into the inlet-side male thread portion of the cylindrical main body while fitting the wedge members into the tapered holes.

  On the other hand, each of the second chuck portions pivotally supports the front end of the second chuck portion so as to be rotatable, and the inner surface on the insertion hole side is a tooth surface, while the outer surface on the opposite side faces the rear end. A plurality of movable tooth members provided with an inclined surface that is an upward slope exposed from the slit, and a male on the rear end side of the cylindrical body while pressing the movable tooth members toward the insertion hole side through the inclined surface. And a nut that can be screwed onto the threaded portion.

  In this way, in the present invention, the front end side of the grip is held by the first chuck portion constituted by the wedge member (collet member), and the rear end side is held by the second chuck portion constituted by the movable tooth member (jaw member). To hold, it is technically similar to a human holding two places on the grip with both hands. In each chuck part, the inner surface is pressed against the grip by the taper action of each member when the nut is tightened, preventing the grip from coming out of the insertion hole. Is technically similar to having a grip by changing the power of each hand or finger on the left and right.

  Moreover, in this invention, the key hole of a bar wrench is provided in the trunk | drum peripheral surface of each cap nut and nut. This means assumes that the final tightening of the cap nut or nut is not performed by hand tightening but by using a bar wrench to perform stronger tightening. By tightening with a bar wrench, the wedge member is inserted deeply into the tapered hole of the cylindrical body for the first chuck portion, and the pressing force to the movable tooth member is increased for the second chuck portion, Secure and strengthen the crimping of the chuck part to the grip part.

  On the contrary, when tightening in such a strong manner, especially in the case of the first chuck portion, the wedge member cannot be removed from the tapered hole even if the cap nut is loosened when trying to pull out the grip from the cylindrical body. Is assumed. This is because the wedge member is firmly held between the grip and the taper hole, and the elastic repulsion force of the grip increases as the pressure-bonding force is increased. Therefore, in the present invention, when the cap nut of the first chuck portion is tightened with a rod wrench, the rod wrench penetrates the barrel portion separately from the key hole on the barrel nut peripheral surface. A means is provided in which a through hole that can be inserted to the female screw hole of the cap nut is provided, and a peripheral groove that communicates with the through hole and that can be engaged with the bar wrench is provided on the outer surface of the wedge member.

  According to this means, by engaging the rod wrench with the circumferential groove of the wedge member through the through hole, the cap nut is loosened and simultaneously the force in the pulling direction acts on the wedge member. As a result, for example, by rotating the cap nut only a few degrees, one of the wedge members moves in the pulling direction, so that the close contact with the tapered hole can be easily released.

  In addition, although the wedge member is a thing of the aspect which divided | segmented the cylindrical socket into multiple parts, it is preferable to set the number of division | segmentation to two. Thus, by providing two pairs of halves, the work of attaching the wedge member to the grip becomes easy.

  On the other hand, in the second chuck portion, the tooth surface of the movable tooth member prevents the slip of the grip. By forming a wavy groove on the tooth surface along the length direction of the grip, the slip prevention effect is obtained. Can be increased.

  According to the present invention, since two positions of the grip of the golf club are held by the first and second chuck portions, it is similar to that a human holds the grip with both hands, as in Patent Documents 1 to 4. By applying to a golf trial hitting device designed to swing close to a human, a more accurate test result close to when a human swings can be obtained. Further, since the final tightening of the cap nut and nut is performed with a bar wrench, the grip can be held more reliably. Furthermore, even when the wedge member is difficult to be pulled out from the tapered hole of the cylindrical body by tightening with the rod wrench, the wedge member can be easily pulled out from the tapered hole by inserting the rod wrench into the through hole of the cap nut and loosening it. be able to. Further, by providing two pairs of half-shaped wedge members, the attachment to the grip becomes easy. Furthermore, by providing the wavy groove on the tooth surface of the movable tooth member, the surface of the grip can bite into the wavy groove, and the slipping and rotation of the grip can be reliably prevented.

The exploded view of the grip structure showing one embodiment of the present invention Explanatory drawing showing the preparation stage of the grip structure Explanatory drawing which showed the final tightening aspect of the 1st chuck | zipper part of the grip structure Explanatory drawing which showed the final tightening aspect of the 2nd chuck | zipper part of the same grip structure Explanatory drawing showing the tooth surface shape of the movable tooth member Explanatory drawing which showed the release mode of the 1st chuck part

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded view of the grip structure of the present invention. Reference numeral 10 denotes a cylindrical main body, 20 denotes a first chuck portion provided on the distal end side of the cylindrical main body 10, and 30 denotes a first chuck of the cylindrical main body 10. This is a second chuck portion provided on the rear end side of the portion 20.

  The cylindrical main body 10 is attached to a swing arm (not shown) of a golf trial hitting device, and an insertion hole 11 is provided at the center. The insertion hole 11 has a diameter that allows the grip G of the golf club to be inserted and removed. Preferably, a bottom wall 12 is provided on the back end side to restrict excessive insertion of the grip G.

  Furthermore, male screw portions 13 and 14 are provided at two locations in the length direction on the outer peripheral surface of the cylindrical main body 10. The male screw portion 13 on the inlet side of the insertion hole 11 corresponds to the first chuck portion 20, and further, a tapered hole 15 that is reduced in diameter toward the back end side is formed on the inner periphery of the insertion hole 11. ing. On the other hand, the rear end side male screw portion 14 corresponds to the second chuck portion 30, and further, a long hole-like slit 16 extending in the longitudinal direction penetrating to the insertion hole 11 is formed in this portion in a cylindrical shape. It is provided at equal intervals around the main body 10. In this embodiment, three slits 16 are provided at intervals of 120 degrees.

  Next, the first chuck portion 20 includes a pair of half-shaped wedge members 21 and a cap nut 22 that is screwed into the inlet-side male screw portion 13 of the cylindrical main body 10. The wedge member 21 has a tapered outer curved surface 21a having the same inclination as that of the inner peripheral shape of the tapered hole 15 of the cylindrical main body 10, and the inner surface has an arc shape whose shape and inclination angle coincide with those of the outer surface of the grip G. An inner curved surface 21b is formed. Therefore, the wedge member 21 can be mounted in a state of being in close contact with the grip G.

  On the other hand, the cap nut 22 has a female screw hole 22a to be screwed into the inlet-side male screw portion 13 of the cylindrical main body 10, and has an inward flange 22b formed at one end face thereof. Accordingly, when the cap nut 22 is tightened, the flange 22 b comes into contact with the tip of the wedge member 21 attached to the grip G, and the wedge member 21 can be pushed into the tapered hole 15.

  Further, in the present embodiment, the key hole 22d of the bar wrench W is provided on the outer peripheral surface of the body portion 22c so that the cap nut 22 is finally tightened with the bar wrench W. In addition to this, a through hole 22e through which the bar wrench W is inserted is provided at the distal end side of the outer peripheral surface of the body portion 22c of the cap nut 22 in addition to the key hole 22d. Corresponding to the through hole 22e, a circumferential groove 21c with which a bar wrench W can be engaged is provided on the front end side of the wedge member 21.

  Subsequently, the second chuck portion 30 includes a movable tooth member 31 and a nut 32. The movable tooth member 31 pivots with the tip 31a pivotally supported by the slit 16 of the cylindrical main body 10. The inner surface on the insertion hole 11 side is a tooth surface 31b, and the opposite outer surface is a horizontal surface 31c. An inclined surface 31d that continuously climbs toward the rear end is provided. In this configuration, when the grip G is inserted into the insertion hole 11, the horizontal surface 31 c is positioned in the slit 16, while the inclined surface 31 d is exposed outward from the slit 16.

  On the other hand, the nut 32 is screwed to the rear end side male screw portion 14 of the cylindrical main body 10, and the rear end surface of the nut 32 advances to the inclined surface 31 d of the movable tooth member 31 by tightening the nut 32. As a result, the movable tooth member 31 is pressed toward the insertion hole 11 (grip G). Reference numeral 33 denotes a support ring inserted through the cylindrical main body 10 between the nut 32 and the movable tooth member 31, and is a member that actually presses the movable tooth member 31 when the nut 32 is tightened. Further, in this embodiment, the key hole 32 b of the bar wrench W is provided on the outer peripheral surface of the trunk portion 32 a of the nut 32, similarly to the cap nut 22 in the first chuck portion 20. Furthermore, in this embodiment, while providing the collar part 31e which protrudes downward in the rear end of the movable tooth member 31, the accommodating part 16b with the bottom 16a which accommodates the said collar part 31e in the rear end of the slit 16 is provided. In addition, the pressing of the movable tooth member 31 due to the tightening of the nut 32 is restricted by the flange portion 31e being brought into contact with the bottom 16a of the housing portion 16b, and the excessive pressing of the movable tooth member 31 is prevented.

  Next, a method of using the grip structure having the above-described configuration will be described. First, as shown in FIG. 2, the cap nut 22 of the first chuck portion 20 is inserted into the grip G, and then a pair of wedges are prepared. The member 21 is mounted so that the grip G can be crowned after confirming the front-rear direction. The mounting is performed by manually applying the wedge member 21 to the front end side of the grip G. On the other hand, the nut 32 and the support ring 33 of the second chuck portion 30 are inserted in advance into the cylindrical main body 10, and more preferably, the nut 32 is shallowly screwed into the male screw portion 14. This prevents the nut 32 and the support ring 33 from falling off.

  After the preparation, the grip G is inserted into the insertion hole 11 of the cylindrical body 10 together with the wedge members 21 and 21, and the work is completed by tightening the cap nuts 22 and nuts 32 of the first and second chuck portions 20 and 30. To do. The tightening sequence is performed in the order of the cap nut 22 of the first chuck portion 20 and the nut 32 of the second chuck portion 30. In addition, initial tightening is performed by hand tightening, and final tightening is performed by a bar wrench W.

  FIG. 3 shows a final tightening mode of the first chuck portion 20. As the cap nut 22 is tightened, the wedge member 21 attached to the grip G is inserted deeply into the tapered hole 15 of the cylindrical body 10. The pressure-bonding force of the wedge member 21 against the grip G is increased according to the insertion depth. The maximum tightening torque can be changed depending on the type of grip G (thickness / elasticity of the material). In the state where the final tightening is performed in this manner, the movement of the wedge member 21 in the removal direction is restricted by the cap nut 22 and the outer surface and the inner surface of the wedge member 21 are reversely tapered. The pressing force applied to the grip G does not change, and the grip G can be held firmly even after a long time or many test swings.

  FIG. 4 shows a final tightening mode of the second chuck portion 30. As the nut 32 is tightened, the nut 32 moves the support ring 33 to the rear end side, and the support ring 33 is moved to the movable tooth member 31. The movable tooth member 31 is strongly pushed into the insertion hole 11 through the inclined surface 31d, and as a result, the pressure-bonding force of the tooth surface 31b of the movable tooth member 31 to the grip G is increased. The maximum tightening torque of the nut 32 is also adjusted according to the type of grip G.

  Note that the shape of the tooth surface 31b of the movable tooth member 31 may be smooth or uneven, but more preferably, as shown in FIG. 5, the wavy groove 31f along the axial direction of the grip G Engrave. In this case, since the surface of the grip G bites into the wavy groove 31f and both the removal direction and the rotation direction of the grip G are simultaneously controlled, the grip G can be held more firmly.

  As described above, according to the grip structure of the present embodiment, the two longitudinal positions of the grip G are held by the first and second chuck portions 20 and 30, and the chuck portions 20 and 30 have different chucking modes. In order to hold the grip G by the crimping force, a form in which a human holds the grip with two hands in the longitudinal direction of the grip and holds the grip with different gripping forces for the left and right hands and fingers is mechanically reproduced. It will be a thing. Therefore, when the grip structure of the present invention is applied to the golf trial hitting devices of Patent Documents 1 to 4, a test result approximate to that when a human makes a test swing can be obtained.

  Further, at the end of the test swing or at the time of changing the club, it is possible to release the chucking of the grip G by the wedge member 21 and the movable tooth member 31 only by loosening the cap nut 22 and the nut 32. However, with regard to the wedge member 21, even when the cap nut 22 is tightened with a wrench, even if the cap nut 22 is removed and the wedge member 21 is pulled out of the tapered hole 15 by hand, it can be inserted into the tight tapered hole 15 and extracted. Often not. For this reason, as shown in FIG. 6, the rod wrench W is inserted into the through hole 22e of the cap nut 22 and the end thereof is engaged with the circumferential groove 21c of the wedge member 21, so that the cap nut 22 is loosened. Turn to. By doing so, along with the movement of the cap nut 22, the one wedge member 21 with which the bar wrench W is engaged can be moved in the pulling direction. Then, as one wedge member 21 moves in the removal direction, the pressure applied to the grip G between the pair of wedge members 21 and the fitting input to the tapered hole 15 are rapidly weakened at the same time.・ It will be possible to pull out 21 by hand.

G Grip W Bar wrench 10 Cylindrical body 11 Insertion hole 13/14 Male thread part 15 Tapered hole 16 Slit 20 First chuck part 21 Wedge member 21a Tapered outer curved surface 21b Arc shaped inner curved surface 22 Cap nut 22d Key hole 22e Through hole 30 Second chuck part 31 Movable tooth member 31b Tooth surface 31d Inclined surface 32 Nut 33 Support ring

Claims (5)

A golf test hitting device grip structure in which a grip of a golf club is inserted into a cylindrical main body, and the grip is held by first and second chuck portions provided in two longitudinal directions of the cylindrical main body,
The cylindrical body has an insertion hole through which the grip can be inserted and removed at the center, and has male screw portions at two outer peripheral surfaces on the inlet side and the rear end side of the insertion hole, and on the inlet side of the insertion hole. Forming a tapered hole with a reduced diameter toward the rear end side on the inner periphery of the inner periphery, and forming a plurality of slits penetrating the insertion hole around the rear end side,
The first chuck portion includes a plurality of wedge members each having a tapered outer curved surface having the same inclination as the tapered hole and an arcuate inner curved surface that can be in close contact with the outer surface of the grip, A cap nut that is screwed into the male thread portion on the inlet side of the cylindrical main body so that a wedge member can be fitted into the tapered hole;
Each of the second chuck portions pivotally supports the tip of the second chuck portion so as to be rotatable in the slit, and the inner surface on the insertion hole side is a tooth surface, while the outer surface on the opposite side is inclined upward toward the rear end. A plurality of movable tooth members provided by exposing the inclined surfaces to be exposed from the slits, and a rear-end-side male screw portion of the cylindrical body so that the movable tooth members can be pressed to the insertion hole side through the inclined surfaces. A grip structure for a golf trial hitting device, comprising: a nut screwed onto the golf ball. 2. A grip structure for a golf trial hitting device according to claim 1, wherein a key hole of a bar wrench is provided on a circumferential surface of the body portion of each of the cap nut of the first chuck portion and the nut of the second chuck portion . In addition to the key hole, a through-hole through which the bar wrench can be inserted to the female screw port of the cap nut is provided on the peripheral surface of the cap nut of the first chuck portion . 3. The golf trial hitting device grip structure according to claim 2, wherein a circumferential groove is provided on the outer surface of the wedge member of the chuck portion so as to communicate with the through hole and engage the rod wrench. The grip structure of the golf trial hitting device according to claim 1 , wherein the wedge member of the first chuck portion includes two halves. Movable tooth member of the second chuck unit, the grip for a golf test hitting device of claims 1 obtained by forming a wavy groove along the length of the grip on the tooth surface, wherein any one of the four.

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