JP6132713B2 - Golf putting practice tool - Google Patents

Description

  The present invention relates to a golf putting practice tool that assumes putting by a putter club, and golf putting for confirming whether or not the face surface of a putter head faces in the correct direction when putting by a putter club It relates to practice tools.

  Conventionally, when swinging a golf club, as a golf practice tool for confirming whether the face surface of the club head is oriented in the correct direction, a cylindrical shape that can be hit with a golf club instead of a spherical ball, Golf practice tools formed in a cylindrical shape, an elliptical shape, etc. have been proposed (Patent Documents 1 to 6).

The reason for making the golf practice tool cylindrical or cylindrical is that the golf practice tool is launched in a direction that emphasizes the deviation of the face angle at the time of swing impact by the golf club, so it is easy to check the deviation of the face angle. is there.
However, there is a significant difference between the club head speed when putting with a putter and the club head speed when shooting with an iron club or a wood club, and it is possible to combine these swing exercises with one golf practice tool. It is not suitable as a practice tool for the swing.

  That is, the golf practice tools described in Patent Documents 4 to 6 are assumed to be shot with an iron club or a wood club, and are not suitable for golf swing practice assuming putting with a putter club.

  The golf practice tool described in Patent Document 1 is a golf practice tool made of rubber or synthetic resin, and a cylindrical one has been proposed. In addition to lack of concreteness as a solid golf practice tool is relatively heavy, it does not roll in the direction to emphasize the face angle deviation, it is difficult to grasp the face angle deviation There's a problem.

  Patent Document 2 also proposes a golf practice tool having an oval or saddle-shaped cross section, but a solid golf practice tool is relatively heavy and tends to emphasize the deviation of the face angle. Since there is no rolling, there is a problem that it is difficult to grasp the deviation of the face angle.

  The golf practice tool described in Patent Document 3 is made of rubber and is formed into a lightweight cylindrical shape that is easily crushed. It is mainly for swing practice assuming a shot with an iron club or a wood club, and greatly deforms during putting. It is not suitable for practicing golf swings assuming putting by putting, such as unstable rolling.

  In particular, when practicing putting, (1) it is preferable that there is a response similar to that when hitting an actual golf ball, and (2) when there is a deviation of the face angle once or twice, It is important that the golf practice tool is launched in a direction that reflects the deviation, and (3) it rolls stably so that the degree to which the face angle is out of order can be grasped.

The golf practice tools described in Patent Documents 1 to 6 do not disclose an invention having a concrete property that can satisfy all of the above (1) to (3).
Further, there has not been proposed a golf swing that can be stably placed on a floor surface that is easy to roll during use and that is suitable for practicing a golf swing that is supposed to be putted by a putter.

Japanese Utility Model Publication No. 55-51259 Japanese Utility Model Publication No. 3-101983 Utility Model Registration No. 3082435 Japanese Utility Model Publication No. 62-39766 Japanese Utility Model Publication No. 52-171356 Japanese Patent Publication No.27-5323

The problems to be solved by the present invention are the matters described in the following 1) to 4).
1) In a conventional golf practice tool formed in a columnar shape or a cylindrical shape, when assuming putting practice with a putter, whether or not the face surface of the putter head is oriented in the correct direction The specific configuration that can be confirmed with the same response as when hitting is not clear.
2) The conventional golf practice tool manufactured from soft rubber has a large deformation when put, and the rolling method after putting is unstable, and the face angle deviation cannot be correctly confirmed. .
3) If a golf practice tool formed in a conventional columnar or cylindrical shape is hard enough to prevent deformation when put, it becomes very heavy and difficult to roll in a direction that emphasizes the deviation of the face angle. End up.
4) It has been proposed that it can be stably placed on a floor surface that is easy to roll during use, and that it is not suitable for golf swing practice assuming indoor putting practice.

Therefore, the object of the present invention is to solve the above-mentioned problems and, assuming putting practice with a putter, whether or not the face surface of the putter head faces in the correct direction is the same as when hitting an actual golf ball. The object of the present invention is to provide a golf putting practice tool that can be confirmed by the response of the above.
Furthermore, an object of the present invention is to provide a golf putting practice tool in which the rolling method after putting is stable and the deviation of the face angle can be easily confirmed.

Another object of the present invention is to provide a golf putting practice tool capable of correctly confirming a face angle deviation by rolling in a direction in which the face angle deviation is emphasized when assuming putting practice by a putter.
Furthermore, another object of the present invention is to provide a golf that can be stably placed on a floor surface that is easy to roll during use, such as when the floor surface is slightly inclined, and is suitable for indoor putting practice. The purpose is to provide a tool for putting practice.

Another object of the present invention is to provide a golf putting practice tool that is easy to set in the launch direction, easy to confirm an address when the club face is square, and has excellent visibility after being put. Is to provide.
The present invention is not intended to provide a golf practice tool suitable for shot practice with an iron club or a wood club.

  The present invention is a golf putting practice tool of a hollow cylindrical body made of a hard material, having an outer diameter substantially equal to the diameter of the golf ball, a length of 50 mm to 65 mm, and substantially the same weight as the golf ball, A golf putting practice tool characterized by having grooves, protrusions, or steps along the axial direction on the outer peripheral surface is the main feature.

The outer peripheral surfaces of both ends of the hollow cylindrical golf putting practice tool made of the hard material may be chamfered.
Moreover, the said outer peripheral surface may have a center display along the circumferential direction in the substantially center part.

The hard material constituting the hollow cylindrical body of the golf putting practice tool may be TPU (thermoplastic polyurethane).
Further, the hollow cylindrical body of the golf putting practice tool may be manufactured by forming the outer peripheral surface with a split mold while forming the inner peripheral surface with a slide mold.

In the golf putting practice tool of the present invention configured as described above, when putting practice with a putter is assumed, the face angle is not deformed by rolling in a direction that emphasizes the face angle deviation. It can be easily confirmed.
Further, whether or not the face surface of the putter head is oriented in the correct direction can be confirmed with the same response as when hitting an actual golf ball.

Furthermore, since the golf putting practice tool of the present invention has grooves, protrusions or steps along the axial direction on the outer peripheral surface, it can be stably placed on a floor surface that is easy to roll during use. It can be suitable for putting practice.
Due to the grooves, protrusions or steps along the axial direction, it is possible to obtain an effect that the club face of the putter can be easily aligned in parallel with the side surface of the golf putting practice tool.

  In addition, the golf putting practice tool of the present invention has the outer peripheral surfaces at both ends chamfered, so that the corners at both ends are not caught on grass, carpet, etc., and rolls stably in the direction of launch Thus, it is possible to correctly confirm the deviation of the face angle.

Furthermore, since the golf putting practice tool of the present invention has a center display along the circumferential direction on the outer peripheral surface thereof, the golf putting practice tool is correctly oriented on the ground or floor surface in the direction of launching the golf putting practice tool. You can put exercise tools.
Further, by making the hard material constituting the hollow cylindrical body of the golf putting practice tool a TPU having appropriate elasticity and adhesiveness, it is possible to prevent the occurrence of spin and obtain stable rolling, and A hit feeling close to that of a golf ball can be obtained.

  Since the hollow cylindrical body of the golf putting practice tool is manufactured by molding the outer peripheral surface with a split mold while molding the inner peripheral surface with a slide mold, it may be provided with grooves, protrusions or steps. In addition to being easy to manufacture, it is possible to easily manufacture a golf putting practice tool that is formed into an accurate cylindrical shape that has a smooth outer peripheral surface and does not generate a gap on the ground surface without distortion.

FIG. 1 shows a golf putting practice tool embodying the present invention, (A) is a perspective view showing the whole, (B) is a view showing a plane, and (C) is a view showing a side. FIG. 2 is a view showing a state where the club face of the putter is addressed in accordance with the side surface of the golf putting practice tool in order to use the golf putting practice tool embodying the present invention. FIG. 3 is a view showing a form of a mold when manufacturing a golf putting practice tool embodying the present invention. FIG. 4 is a view showing a state after a golf putting practice tool embodying the present invention is hit with a putter. FIG. 5 is a view showing an end face of a golf putting practice tool of another embodiment embodying the present invention. FIG. 6 is a graph showing a result of hitting a golf putting practice tool embodying the present invention with a putter while the club face is open, and a table of numerical data. FIG. 7 is a graph showing a result of hitting a golf putting practice tool embodying the present invention with a putter while the club face is closed, and a table of numerical data.

  The present invention is a golf putting practice tool of a hollow cylindrical body made of a hard material, having an outer diameter substantially equal to the diameter of the golf ball, a length of 50 mm to 65 mm, and substantially the same weight as the golf ball, A golf putting practice tool characterized by having grooves, protrusions, or steps along the axial direction on the outer peripheral surface, which can be suitably embodied by the embodiments described below.

  Hereinafter, an embodiment of a golf putting practice tool of the present invention will be described.

As shown in FIG. 1, a golf putting practice tool 10 according to an embodiment of the present invention is composed of a hollow cylindrical body 1 made of a hard material, and is substantially equal to the diameter (42.67 mm) of a golf ball. It has an outer diameter D, a length L of 50 mm to 65 mm, and a weight substantially equal to about 46 grams, which is the weight of a golf ball.
That is, in the present invention, the weight of the golf putting practice tool is preferably about 35 grams to about 50 grams.

Further, the golf putting practice tool 10 includes a shallow and thin groove 2 having a depth of about 0.5 mm and a width of about 1 mm along the axial direction at a position 180 degrees apart on the outer peripheral surface.
Therefore, if the groove 2 is placed on the floor or the like with the groove 2 on the bottom, the golf putting practice tool 10 is stable and can be prevented from inadvertently rolling even on a floor surface that is easy to roll.

Moreover, as a hard material which comprises the hollow cylinder 1 of the said golf putting practice tool 10, the hard material which has moderate elasticity and adhesiveness is especially suitable, and using TPU (thermoplastic polyurethane) suitably. it can. As a result, spin can be prevented, stable rolling can be obtained, and a hitting feeling close to that of a golf ball can be obtained.
The TPU having a Shore A hardness of around 90 is particularly suitable.
A plastic that is harder than TPU, lacks adhesiveness, and is slippery, such as acrylic, may cause spin and lack rolling stability. In addition, a soft material having a hardness lower than that of TPU has a different hitting feeling from a golf ball.

Chamfering 3 is applied to the outer peripheral surfaces of both ends of the golf putting practice tool 10 of the hollow cylindrical body 1. Further, the outer peripheral surface of the golf putting practice tool 10 has a center display 4 along the circumferential direction at substantially the center thereof.
Further, on the outer peripheral surface of the golf putting practice tool 10, a guide display 5 along the circumferential direction is provided in a portion close to both end portions.

By the center display 4 and the guide 5, it is possible to easily aim at the direction in which the golf putting practice tool 10 is launched, and to obtain an effect of easily aligning the club face F of the putter P in parallel with the side surface of the golf putting practice tool 10. Can do.
It should be noted that the golf putting practice tool 10 of the present invention is not designed and calculated for its shape, strength, durability, flying direction, etc., assuming that it is shot by an iron club or a wood club. It cannot be shot with a wood club.

Next, a method for manufacturing the golf putting practice tool 10 described above will be described.
First, a vertical split mold M that matches the outer peripheral surface of the hollow cylindrical body 1 constituting the golf putting practice tool 10 and a slide mold S that matches the inner peripheral surface of the golf putting practice tool 10 are prepared.

After the molds are tightened, the resin is injected, and the slide mold S is pulled out in the left-right direction to be separated, and the golf putting practice tool 10 is formed by opening the vertical mold M. The hollow cylinder 1 to be removed is taken out.
By manufacturing the hollow cylindrical body 1 by the above method, the golf putting practice tool 10 formed into an accurate cylindrical shape having a smooth outer peripheral surface and no gaps on the ground surface without distortion is easily manufactured. can do.

Thereafter, the center display 4 and the guide display 5 are stamp-printed. At the time of printing, instead of printing the display for 360 degrees, it is possible to prevent printing misalignment from conspicuous by printing by dividing the display into four by about 75 degrees.
It is possible to easily recognize the position of the groove 2 by arranging the groove 2 in a portion where the indications 4 and 5 are interrupted.

When the golf putting practice tool 10 configured as described above is used, as shown in FIGS. 2 and 4, the golf putting practice tool 10 is directed in the direction of launching using the center display 4 and the guide 5. The golf putting practice tool 10 is placed on the ground or floor.
In this case, by placing the groove 2 downward, the golf putting practice tool 10 can be placed stably and easily even on a floor surface that is easy to roll, and the upper groove 2 allows the club face F of the putter P to be placed. Can be easily adjusted in parallel with the side surface of the golf putting practice tool 10.

As shown in FIG. 5, when the projection 6 or the step 7 along the axial direction is provided on the outer peripheral surface of the golf putting practice tool 10 instead of the groove 2, the golf putting practice tool 10 is placed on the ground or It can be made stable and easy to place on the floor.
In the embodiment shown in FIG. 5, the two protrusions 6 are formed at slightly separated positions, and the step 7 is formed by partially making the outer peripheral surface planar. However, the present invention is limited to these forms. It is not a thing.
For example, the number of protrusions may be one and the length thereof may be short. The height of the protrusion is not limited as long as it does not hinder rotation, and may be about the hair (0.2 mm).

Thereafter, by hitting the side surface (circumferential surface) of the golf putting practice tool 10 so as to hit the golf ball and confirming the rolling direction, it is determined whether or not the club face F is correctly oriented during the swing of the putter for putting. Can be confirmed.
At this time, as shown in FIG. 4, the golf putting practice tool 10 is launched in a direction in which the deviation of the face angle is emphasized, so that the deviation of the face angle can be emphasized and known.
In particular, if the face angle is distorted twice, the 1.5m distance pat that greatly affects the score makeup cannot be determined. It is extremely important for golf swing practice in putting.

  6 and FIG. 6 show average values of results obtained by actually hitting the artificial turf five times on the artificial turf to confirm in what direction the golf putting practice tool 10 of the present invention is put and rolled. 7 will be described.

In the following test results, the strength of the swing to be put was the strength at which the golf ball rolls 1.5 m.
Further, the golf putting practice tools of Examples 1 to 4 and Comparative Examples 1 to 4 described below are all golf putting practice tools made of thermoplastic polyurethane made of a hollow cylindrical body 1 having an outer diameter D of 43 mm and an inner diameter of about 33 mm. .

  The golf club used was a pin type putter, and when the face was put open or closed, the length shifted from the position reached when the face angle was square in the line 90 cm ahead was measured.

The golf putting practice tool 10 of Example 1 has a length L of 60 mm and a weight of 45 grams.
As a result of the test, as shown in FIG. 6, a deviation of 10.2 cm was observed when the face was opened once and putting was performed, and a gap of 12 cm was observed when the pad was placed with the face opened twice.
Further, as shown in FIG. 7, when putting with the face closed once, a displacement of 12.4 cm was observed when putting with the face closed twice.

The golf putting practice tool 10 of Example 2 has a length L of 65 mm and a weight of 49 grams.
As a result of the test, as shown in FIG. 6, a displacement of 12.6 cm was observed when the face was opened once and putting was performed with the face opened twice, and a displacement of 14 cm was recognized.
Further, as shown in FIG. 7, when the putting was performed with the face closed once, a displacement of 22.8 cm was observed when the putting was performed with the face closed twice.

The golf putting practice tool 10 of Example 3 has a length L of 55 mm and a weight of 41 grams.
As a result of the test, as shown in FIG. 6, a deviation of 15.8 cm was observed when the face was opened once and putting was performed with the face opened twice, and a deviation of 22 cm was recognized.
In addition, as shown in FIG. 7, when putting with the face closed once, a displacement of 24.4 cm was observed when putting with the face closed twice, and 29.2 cm.

The golf putting practice tool 10 of Example 4 has a length L of 50 mm and a weight of 37 grams.
As a result of the test, as shown in FIG. 6, a deviation of 7.6 cm was observed when putting with the face open once, and 16.6 cm when putting with the face opened twice.
Further, as shown in FIG. 7, when putting with the face closed once, a displacement of 12.8 cm was observed when putting with the face closed twice.

From the test results of Examples 1 to 4 of the golf putting practice tool 10 embodying the present invention, the golf putting practice tool 10 of the present invention has a face angle deviation of 0 to 2 degrees. It was confirmed that it was rolled in a direction that emphasized the angle deviation proportionally, and it was confirmed that it was very effective for putting practice with a putter while confirming the face angle deviation. Note that the same result of rolling and rolling in a direction that emphasizes the deviation of the face angle in proportion was confirmed even in putters with different shapes such as mallet type and L-shape.
(Comparative Example 1)

  Next, as a comparative example in which the length and weight are different from the golf putting practice tool 10 of the present invention, a golf ball putting practice tool having a length L of 43 mm and a weight of 32 grams is similarly face angle at a line 90 cm ahead. The length deviated from the position reached when the square is square was measured.

As a result of the test, as shown in FIG. 6, a deviation of 11.2 cm was observed when the face was opened once and putting was performed, and a deviation of 16.4 cm was observed when the pad was placed with the face opened twice.
Further, as shown in FIG. 7, when putting with the face closed once, a displacement of 1.4 cm was observed when putting with the face closed twice.

Therefore, especially when the face is closed, it is confirmed that there is little deviation from the case where the face angle is square, and it is difficult to determine the deviation of the face angle. Furthermore, when the length L was as short as 43 mm and as light as 32 grams, the practice tool fluttered due to the impact, and the rolling direction became unstable.
(Comparative Example 2)

  As in Comparative Example 1, as a comparative example that is different in length and weight from the golf putting practice tool 10 of the present invention, the results of putting a golf putting practice tool having a length L of 70 mm and a weight of 52 grams were measured. did.

As a result of the test, as shown in FIG. 6, a deviation of 10 cm was observed when putting with the face open once, and 10 cm when putting with the face opened twice.
In addition, as shown in FIG. 7, when putting with the face closed once, a displacement of 14.6 cm was observed when putting with the face closed twice.
Therefore, when the face is open, it is impossible to grasp whether the angle of the face angle is 1 degree or 2 degrees, and it is not suitable for practicing putting while judging the accuracy of the face angle. It was confirmed that there was.
(Comparative Example 3)

  Similar to Comparative Example 1, as a comparative example having a length and a weight different from those of the golf putting practice tool 10 of the present invention, the result of putting a golf putting practice tool having a length L of 80 mm and a weight of 60 grams was measured. did.

As a result of the test, as shown in FIG. 6, a deviation of 10.4 cm was observed when the face was opened once and putting was performed with the face opened twice, and a deviation of 9 cm was recognized.
Further, as shown in FIG. 7, a displacement of 10.6 cm was observed when putting with the face closed once, and a displacement of 15.8 cm was observed when putting with the face closed twice.
Therefore, when the face is open, it will be misunderstood whether the deviation of the face angle is 1 degree or 2 degrees, which is not suitable for practicing putting while judging the accuracy of the face angle. It was confirmed that it was not.
(Comparative Example 4)

  Similar to Comparative Example 1, the result of putting a golf putting practice tool having a length L of 90 mm and a weight of 67 grams as a comparative example that is different in length and weight from the golf putting practice tool 10 of the present invention. Was measured.

As a result of the test, as shown in FIG. 6, a deviation of 13.7 cm was observed when putting with the face opened once, and 12.6 cm when putting with the face opened twice.
Further, as shown in FIG. 7, a shift of 5.2 cm was observed when putting with the face closed once, and 4.2 cm when putting with the face closed twice.

Therefore, when the face is open, it will be misunderstood whether the deviation of the face angle is 1 degree or 2 degrees, which is not suitable for practicing putting while judging the accuracy of the face angle. It was confirmed that it was not.
Furthermore, when the face is closed, it is not only possible to determine whether the angle of the face angle is 1 degree or 2 degrees, and there is little deviation from the case where the face angle is square, and the face angle is incorrect. It was confirmed that it was difficult to judge.

Further, in Comparative Examples 2 to 4 having a length L of 70 mm or more, since the length L is about the same as the length of the face F of the putter head, the image is significantly different from the case of hitting a golf ball. Thus, the problem that it was difficult to address and the problem that it was easy to hit twice were recognized.
Furthermore, as a comparative example of another hollow cylindrical body having a length L of 70 mm, a test was conducted with an outer diameter D of 43 mm and weights of 37 grams and 49 grams. It has been confirmed that it is difficult to determine whether the deviation is 1 degree or 2 degrees, or the deviation from the case where the face angle is square is small, and it is difficult to judge the deviation of the face angle. .

  On the other hand, as a comparative example of another hollow cylindrical body having a length L of 43 mm, as a result of testing with an outer diameter D of 43 mm and weights of 37 grams and 49 grams, it is still difficult to obtain stable rolling. It was confirmed.

  In addition, as a material constituting the golf putting practice tool 10 of the present invention, it is possible to obtain a stable rolling after being put, having a suitable elasticity and stickiness, hardly causing spin, and hitting feeling. TPU was used in consideration of strength, durability, weight, ease of manufacture, etc., but it is not limited to this material as long as it has similar physical characteristics. .

Further, the shape and arrangement of each part such as the hollow cylindrical body 1, the groove 2, the chamfer 3, the center display 4, the guide display 5, the protrusion 6, and the step 7 of the golf putting practice tool 10 without departing from the spirit of the present invention. The number or size may be changed as appropriate, or the thickness, weight, material, and the like of the hollow cylindrical body 1 may be changed as appropriate.
For example, the depth, width, length, number, etc. of the grooves 2 may be changed as appropriate.

  In the present invention, when putting practice by a putter is assumed, whether or not the face surface of the putter head is oriented in the correct direction can be easily confirmed by the same response as when hitting an actual golf ball. It can be suitably used as a putting practice tool.

DESCRIPTION OF SYMBOLS 10 Golf putting practice tool 1 Hollow cylindrical body 2 Groove 3 Chamfering 4 Center display 5 Guide display 6 Protrusion 7 Step difference D Outer diameter F Club face L Length M Split type P Patter S Slide type

Claims (5)

A hollow cylindrical golf putting practice tool made of a hard material,
An outer diameter approximately equal to the diameter of the golf ball;
A length of 50 mm to 65 mm;
It has almost the same weight as a golf ball,
A golf putting practice tool comprising grooves, protrusions, or steps along the axial direction on an outer peripheral surface.   The golf putting practice tool according to claim 1, wherein the outer peripheral surfaces of both end portions are chamfered.   The golf putting practice tool according to claim 1, wherein the outer peripheral surface has a center display along a circumferential direction at a substantially central portion thereof.   The golf putting practice tool according to any one of claims 1 to 3, wherein the hard material constituting the hollow cylindrical body is TPU.   The said hollow cylindrical body is manufactured by shape | molding an internal peripheral surface with a slide type | mold, shape | molding an outer peripheral surface with a split mold, The any one of Claims 1-4 characterized by the above-mentioned. Golf putting practice tool.

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