Cushioning material for golf practice mats and golf practice mats

Abstract

To provide a cushioning material for a golf practice mat which can obtain a hitting feeling as if a user actually hit a ball on a golf course, is low in a manufacturing cost, and requires little labor for the repair, and a golf practice mat.SOLUTION: A cushioning material for a golf practice mat is a cushioning material 1 arranged under artificial turf 4 and has a plurality of cylindrical elastic bodies 2. The elastic bodies 2 are arranged in such a manner that peripheral surfaces are in contact with each other side by side, are porous bodies of EPDM, and have a compression load value of 5 to 30 N / 100 mm when compressed by 2 mm from the outside in a radial direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a golf practice mat used for practicing golf swings, and more particularly to a cushioning material for a golf practice mat that is placed under the artificial turf of the golf practice mat. [Background technology]

[0002] Conventionally, when practicing golf swings at a driving range or at home, various golf practice mats have been used to prevent the golf club from being damaged or making noise by accidentally hitting the floor with the golf club, and to make the feel of hitting the ball more similar to the feel of hitting the ball on an actual golf course. Hereinafter, golf practice mats will also be referred to simply as "mats."

[0003] Patent Document 1 discloses a golf practice mat that has a spring-tensioned cable system arranged inside a rigid frame and an artificial turf means arranged on the upper surface of the rigid frame. It is described that this quickly alleviates fear and hesitation during golf swings, leading to more natural and effective practice.

[0004] Patent Document 2 discloses a golf mat in which a pad such as artificial turf is attached to a frame with elastic elements such as rubber bands, allowing it to move in a direction parallel to the swing direction when the golf club is swung. It describes that when the club head comes into contact with the pad, the pad slides forward, allowing the golfer to experience a sensation (hit feel) similar to hitting on real turf, with the grass and soil absorbing the impact force, and reducing accidental distortion or rebound of the club head. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 3-75075 [Patent Document 2] Special Publication No. 2015-514555 Summary of the Invention [Problem to be solved by the invention]

[0006] As described in Patent Documents 1 and 2, conventional golf practice mats have various features to provide golfers with a hitting feel similar to that of hitting the ball on a golf course, allowing them to achieve better practice results.

[0007] However, even though the golf practice mats described in Patent Documents 1 and 2 provide a similar feel to hitting a ball on an actual golf course, they have a large number of components and a complex structure, which can lead to high manufacturing costs and the need for repairs.

[0008] The present invention was made in consideration of these circumstances, and aims to provide a cushioning material for a golf practice mat and a golf practice mat that provide a hitting feel similar to that of actually hitting a ball on a golf course, while reducing manufacturing costs and the effort required for repairs. Hereinafter, the cushioning material for a golf practice mat will also be referred to simply as the "cushioning material." [Means for solving the problem]

[0009] The cushioning material for golf practice mats of the present invention is a cushioning material that is placed under the artificial turf of a golf practice mat used for golf swing practice, and is characterized in that it has a plurality of cylindrical elastic bodies, which are arranged in parallel with their outer surfaces in contact with each other.

[0010] The elastic body is characterized by being a porous body of EPDM.

[0011] The elastic body is characterized in that the compression load value when compressed 2 mm from the radially outer side is 5 to 30 N / 100 mm, where the compression load value is a value obtained by measuring the compression characteristics of a sample cut to a length of 100 mm.

[0012] The elastic body is characterized by having a diameter of 2 cm to 4 cm.

[0013] The cushioning material for golf practice mats has a frame body surrounding the plurality of elastic bodies, the compression modulus of elasticity of the frame body measured by the JIS K7181 method is higher than that of the elastic bodies, and the frame body is located at the lower outer periphery of the cushioning material for golf practice mats.

[0014] The golf practice mat of the present invention is a rectangular mat comprising the above-mentioned golf practice mat cushioning material and the above-mentioned artificial turf placed on top of the golf practice mat cushioning material, and is characterized in that the elastic body is arranged in parallel to the short side direction of the golf practice mat, and the long axis direction of the elastic body coincides with the long side direction of the golf practice mat. [Effects of the Invention]

[0015] The cushioning material for golf practice mats of the present invention is placed under the artificial turf of a golf practice mat used for golf swing practice and has multiple cylindrical elastic bodies arranged in parallel with their outer peripheral surfaces in contact with each other. When a ball is hit on a golf practice mat equipped with the cushioning material, large deformation occurs, in which the cavities of the elastic bodies are crushed to form an elliptical cross section, and small deformation occurs, in which the cylindrical portion of the elastic body is subjected to a compressive force and deforms locally. The simultaneous occurrence of these large and small deformations provides a hitting feel similar to that of actually hitting a ball on a golf course, such as the hardness of the ground and the feel of the club's release. Furthermore, the cushioning material of the present invention has a simple structure with a limited number of component types, resulting in low manufacturing costs and minimal repair work.

[0016] The elastic body is a porous EPDM body, so the large and small deformations described above are more likely to occur. In addition, the elastic body has a compression load value of 5 to 30 N / 100 mm when compressed 2 mm from the radially outer side, so deformation of the elastic body occurs more easily, resulting in an even better impact feel.

[0017] The elastic bodies have a diameter of 2 cm to 4 cm, so when the golf club is swung and the club head comes into contact with the mat, the elastic bodies deform, allowing a consistent hitting feel to be obtained regardless of the location of the club head in contact with the mat.

[0018] The cushioning material for golf practice mats has a frame surrounding multiple elastic bodies, and the compression modulus of the frame, measured according to JIS K7181, is higher than that of the elastic bodies, and the frame is provided at the lower periphery of the cushioning material for golf practice mats. Therefore, the cushioning material of the present invention has excellent rigidity and is prone to deformation or displacement of the elastic bodies when subjected to external force. Therefore, the cushioning material has excellent durability and easily dissipates the force received by the elastic bodies from the club head when the club head comes into contact with the mat, resulting in an excellent hitting feel.

[0019] The golf practice mat of the present invention is a rectangular mat in plan view, comprising the golf practice mat cushioning material of the present invention and artificial turf placed on top of the golf practice mat cushioning material, and the elastic bodies are arranged parallel to the short sides of the mat, and the long axis direction of the elastic bodies coincides with the long side direction of the mat, making it easy to install the mat so that the long axis direction of the elastic bodies coincides with the ball's launch direction. In this case, the club head has an even better release feel when it comes into contact with the mat. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic diagram of a cushioning material according to a first embodiment of the present invention. [Figure 2] 1 is a schematic diagram of a golf driving range where the buffer material of the first embodiment is installed. [Figure 3] 1A to 1C are schematic diagrams illustrating how a golf practice mat equipped with a cushioning material of the present invention is used. [Figure 4] 1A and 1B are schematic diagrams illustrating a usage mode of a conventional golf practice mat equipped with a cushioning material. [Figure 5] FIG. 4 is a schematic diagram of a cushioning material according to a second embodiment of the present invention. [Figure 6] FIG. 10 is an enlarged view of a corner of the cushioning material of the second embodiment. [Figure 7] 10A and 10B are enlarged views of the front and back surfaces of the cushioning material of the second embodiment. [Figure 8] FIG. 10 is a diagram showing a measurement mode when measuring the compression characteristics of an elastic body. [Figure 9] 1 shows the measurement results of compression characteristics of Example 1. [Figure 10] 10 shows the measurement results of compression characteristics of Example 2. [Figure 11] 10 shows the measurement results of compression characteristics in Example 3. [Figure 12] 1 shows the measurement results of compression characteristics of Comparative Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0021] (First embodiment) A first embodiment of a cushioning material for golf practice mats according to the present invention will be described with reference to Figs. 1 to 3. Fig. 1 is a schematic diagram of the cushioning material of the first embodiment. Here, Fig. 1(a) is a perspective view of the cushioning material of the first embodiment seen obliquely from above. Fig. 1(b) is a cross-sectional view of the elastic body of the cushioning material of the first embodiment in a direction perpendicular to the longitudinal axis. Fig. 1(c) is a cross-sectional view of the end of the elastic body of the cushioning material of the first embodiment in the longitudinal axis direction.

[0022] In the form shown in FIG. 1(a), the cushioning material 1 has a rectangular planar shape, with the length Wc of the short side being, for example, 27.5 cm and the length Lc of the long side being, for example, 87.5 cm. The cushioning material 1 is composed of a cylindrical elastic body 2 having an internal cavity. In addition, in the form shown in FIG. 1(a), the cushioning material 1 has eight elastic bodies 2. The elastic bodies 2 are arranged in parallel in one direction with their outer peripheral surfaces in contact with each other. The elastic bodies 2a arranged at both ends in the parallel direction of the elastic bodies 2 are in contact with the other elastic bodies 2 on only one side. Furthermore, the elastic body 2b arranged between the elastic bodies 2a at both ends is in contact with the other elastic bodies 2 at two portions of its outer peripheral surface located on opposite sides of the central axis.

[0023] The planar shape of the cushioning material is not particularly limited, and may be rectangular, circular, oval, square, or the like. Because conventional golf practice mats are often rectangular in planar shape, it is preferable that the planar shape of the cushioning material be rectangular in order to ensure compatibility with conventional cushioning materials. In the case of rectangular cushioning material, the length of each side can be freely selected. For example, the long side length Lc can be selected within a range of 30 cm to 120 cm. Furthermore, the short side length Wc is preferably 20 cm to 50 cm in order to facilitate golf practice. The cushioning material may have, for example, 5 to 20 elastic members, and more preferably 8 to 12 elastic members in order to improve hitting feel.

[0024] The elastic bodies may be arranged in parallel not only in one direction (horizontal direction) but also in the vertical direction, as long as their outer surfaces are in contact with each other. For example, multiple cushioning materials 1 shown in FIG. 1 may be stacked vertically to form a multi-layered cushioning material. A cushioning material with elastic bodies arranged in only one direction is preferable because it is made up of a small number of parts, which reduces manufacturing costs and reduces the effort required for repairs. On the other hand, if the elastic bodies are arranged in parallel not only in one direction (horizontal direction) but also in the vertical direction, the cushioning material will have many cavities, which will allow it to attenuate force through deformation even when subjected to a large force, resulting in better shock absorption.

[0025] In Figure 1, the elastic body 2 is made of a porous EPDM body. The elastic body is not limited to EPDM and can be freely selected from natural rubber, synthetic natural rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile resin, ethylene-propylene resin, chlorosulfonated polyethylene resin, acrylic resin, urethane resin, silicone resin, fluororesin, polysulfide resin, etc. The elastic body does not have to be porous, but can also be solid.

[0026] As shown in Figures 1(b) and 1(c), the diameter Do of the cylindrical elastic body 2 is approximately 2.5 cm. The inner diameter Di of the elastic body 2 (the diameter of the cavity 2') is approximately 1.5 cm. The thickness of the elastic body 2 ((Do - Di) / 2) is approximately 0.5 cm, and is constant in both the longitudinal and circumferential directions.

[0027] The diameter Do of the elastic body 2 is not particularly limited and can be selected, for example, in the range of 2 cm to 4 cm. By setting the diameter of the elastic body within this range, multiple elastic bodies are deformed when the golf club is swung and the club head comes into contact with the mat. This makes it possible to obtain a consistent hitting feel regardless of the location of the club head in contact with the mat. Furthermore, the thickness of the elastic body 2 can be selected, for example, in the range of 0.2 cm to 1 cm. Setting the thickness of the elastic body within this range is preferable because it allows for both the deformability of the elastic body and its recovery after deformation.

[0028] In Fig. 1, the multiple elastic bodies 2 are fixed at their contacting portions with an adhesive. The multiple elastic bodies may be fixed with tape instead of adhesive. When fixed with tape, for example, the contacting portions of the elastic bodies may be attached with double-sided tape. The multiple elastic bodies may be fixed with a combination of adhesive and tape.

[0029] The elastic body preferably has a moderate degree of deformability when a load is applied from the radially outer side. Specifically, the elastic body preferably has a compression load value of 5 to 30 N / 100 mm when compressed 2 mm from the radially outer side. Furthermore, the elastic body preferably has a compression load value of 20 to 70 N / 100 mm when compressed 5 mm from the radially outer side. As will be shown in the examples below, many of the urethane resin molded bodies used in conventional cushioning materials for golf practice mats are difficult to deform, so the cushioning material of the present invention is more easily deformed and provides an even better feel when hit.

[0030] A golf practice mat equipped with a cushioning material of the first embodiment will be described with reference to Fig. 2. Fig. 2 is a schematic diagram of a golf practice range where a golf practice mat equipped with a cushioning material of the first embodiment is installed. Fig. 2(a) is a plan view of the golf practice range where the golf practice mat is installed, seen from above, and Fig. 2(b) is a perspective view of the golf practice mat shown in Fig. 2(a) as seen from the ball's hitting direction S.

[0031] As shown in FIG. 2, the cushioning material 1 of the present invention is placed under the artificial turf 4 of a golf practice mat 3 used for golf swing practice. The golf practice mat 3 is placed between the lifting tee 5 and the standing position 6. The artificial turf 4 is placed around the lifting tee 5 and at the standing position 6. The golf practice mat 3 is a mat with a rectangular planar shape comprising the cushioning material 1 and the artificial turf 4 placed on top of the cushioning material 1. The lengths of the short and long sides of the cushioning material 1 are set shorter (for example, about 1 cm) than the lengths of the short and long sides of the golf practice mat 3, respectively. The elastic bodies 2 are placed in parallel along the short side direction of the rectangular mat, and the long axis direction of the elastic bodies 2 coincides with the long side direction of the mat.

[0032] The length of the short side of the mat can be freely selected, preferably in the range of 20 cm to 50 cm. By setting the length of the short side of the mat in this range, it can easily replace conventional golf practice mats at existing golf driving ranges, and the mat can be easily installed so that the long axis direction of the elastic body and the ball's launch direction S are aligned. In this case, the club head will have an even better feel when it comes into contact with the mat.

[0033] The method for fastening the cushioning material to the artificial turf is not particularly limited, but for example, double-sided tape (not shown) can be used. The double-sided tape may be attached to all of the multiple elastic bodies to secure the artificial turf, or to only some of the elastic bodies to secure the artificial turf. For example, the double-sided tape used to secure the artificial turf may be attached to one of the adjacent elastic bodies, but not to the next adjacent elastic body, and then to the next adjacent elastic body, alternating between these two. Alternatively, the double-sided tape may be attached to each of the elastic bodies at both ends of a parallel arrangement of elastic bodies to secure the artificial turf. In this way, by alternately attaching multiple elastic bodies to the artificial turf or by attaching only the elastic bodies at both ends, the elastic bodies can be more easily deformed and displaced horizontally, resulting in a better feel of the club head when it comes into contact with the mat. When attaching the double-sided tape alternately, the number of elastic bodies to which double-sided tape is attached and the number of elastic bodies not to which double-sided tape is attached are not limited to one, and any number of tapes can be selected.

[0034] The deformation of the cushioning material when a ball is hit on a golf practice mat equipped with the cushioning material of the present invention will be described with reference to Figure 3. Figure 3(a) is a perspective view of a golf practice mat equipped with the cushioning material of the first embodiment, and Figure 3(b) is a view taken along arrow A in Figure 3(a) when a ball is hit on the mat.

[0035] As described above, the golf practice mat 3 is composed of a cushioning material 1 made of a cylindrical elastic body 2 and artificial turf 4. The artificial turf 4 is composed of a resin turf member 41 simulating natural grass and a substrate 42 that holds the turf member 41. As shown in FIG. 3 , the launch direction S of the ball 7 is the same as the longitudinal direction of the elastic body 2. When a player swings a golf club to launch the ball 7, the club head 8 contacts not only the ball 7 but also the golf practice mat 3 underneath. At this time, the club head 8 applies force not only to the artificial turf 4 on the surface of the golf practice mat 3 but also to the elastic body 2, deforming the elastic body 2. During this process, the cushioning material 1 of the present invention undergoes two major deformations: a large deformation in which the cavities in the elastic body 2 are crushed, resulting in an elliptical cross-section, and a small deformation in which the cylindrical portion of the elastic body 2 is locally deformed by a compressive force. The simultaneous occurrence of these large and small deformations reduces the sense of reaction from the ground 9, providing a hitting feel similar to that of actually hitting a ball on a golf course, such as a sense of club release. Furthermore, the cushioning material of the present invention has a simple structure with a small number of different constituent members, and therefore has low manufacturing costs and requires little effort for repair.

[0036] As a comparison with the mat equipped with the cushioning material of the present invention described above, the deformation of a mat equipped with a conventional cushioning material (a plate-shaped elastic body with no hollows) when a ball is hit on the mat will be explained with reference to Figure 4. Figure 4(a) is a perspective view of a golf practice mat equipped with the conventional cushioning material, and Figure 4(b) is a view taken from the arrow B in Figure 4(a) when a ball is hit from the mat.

[0037] Even with conventional cushioning material 11, when a golfer swings a golf club to hit ball 7, club head 8 applies force not only to artificial turf 4 on the surface of golf practice mat 13 but also to elastic body 12, causing elastic body 12 to deform. At this time, elastic body 12 does not have an internal cavity like the cushioning material of the present invention, so elastic body 12 is less likely to deform and is less likely to absorb impact through deformation, and so the golfer is more likely to feel a reaction force from ground 9 below cushioning material 11. In particular, if the club head contacts the mat with a strong force, the golfer is more likely to feel a different impact sensation from when actually hitting a ball on a golf course, which can reduce the effectiveness of practice.

[0038] (Second embodiment) A second embodiment of the cushioning material of the present invention will be described with reference to Figs. 5 to 7. Details of the matters described with reference to Figs. 1 to 3 will not be described again. Fig. 5 is a schematic diagram of the cushioning material of the second embodiment, and Fig. 5(a) is a plan view of the cushioning material of the second embodiment as viewed from above. Fig. 5(b) is a perspective view of a corner of the cushioning material as viewed obliquely from above. Fig. 5(c) is a perspective view of a corner of a frame of the cushioning material as viewed obliquely from above.

[0039] As shown in FIG. 5( a), the cushioning material 21 has a rectangular planar shape, and the longitudinal axis of the elastic bodies 2 coincides with the long side of the cushioning material 21. The cushioning material 21 also has eleven cylindrical elastic bodies 2. The elastic bodies 2 are arranged in parallel with their outer peripheral surfaces in contact with each other, and the contacting portions of adjacent elastic bodies 2 are fixed with an adhesive. The cushioning material 21 has a frame 10 surrounding the eleven elastic bodies 2. The eleven elastic bodies 2 are surrounded by the frame 10, which allows the cushioning material 21 to maintain its shape while providing excellent flexibility in deformation and displacement when subjected to external force. The elastic bodies are fixed at the contacting portions of adjacent elastic bodies, but the outer peripheral surfaces of the elastic bodies facing the ground may be further fixed with a single adhesive sheet. Both ends of the elastic bodies in the longitudinal direction may also be fixed to the frame. Fixing methods can be freely selected from adhesives, thermocompression bonding, heat fusion, adhesive sheets, adhesive tape, staples, and the like.

[0040] As shown in FIG. 5(b), the frame 10 is disposed below the outer periphery of the buffer material 21. The frame 10 is not porous, but is made of, for example, solid EPDM. The compressive elastic modulus of the frame 10 measured by the JIS K7181 method is higher than that of the elastic body 2. This provides more reinforcement than when the buffer material is made of only an elastic body, and the rigidity of the buffer material 21 is therefore higher than that of the buffer material of the first embodiment.

[0041] The frame body 10 is composed of two types of frame members. Frame member 10a is provided on the short side of the cushioning material 21, and frame member 10b is provided on the long side of the cushioning material 21. As shown in FIG. 5(c), frame member 10a and frame member 10b are both rod-shaped members with pentagonal cross sections, and have their largest surface 101 in contact with the elastic body 2.

[0042] FIG. 6 is an enlarged view of a corner of the cushioning material of the second embodiment. FIG. 6(a) is a view taken along the arrow C in FIG. 5(a), and FIG. 6(b) is a view taken along the arrow D in FIG. 5(a). The shape of the frame body is not particularly limited. For example, the height Ha of the frame members 10a and 10b is 1 / 4 to 1 / 2 of the height (diameter Do) of the elastic body 2. Note that in FIG. 6, the heights of the frame members 10a and 10b are the same, but they may be different within the above range. By configuring the frame members to have the height described above, the frame body 10 surrounds (covers) the lower outer periphery of the cushioning material 21 but does not surround the upper outer periphery of the cushioning material 21, making it easier for the upper part of the elastic body, i.e., the side receiving the load, to move freely. This increases the rigidity and durability of the cushioning material, and allows the elastic body to deform freely, resulting in an even better feel when the club head comes into contact with the mat.

[0043] Figure 7 is an enlarged view of the front and back surfaces of the cushioning material of the second embodiment. Figure 7(a) is a perspective view of the front surface, and Figure 7(b) is a perspective view of the back surface. The frame 10 is arranged around the cushioning material 21, and no reinforcing member is provided on the back surface of the cushioning material 21. Note that a reinforcing member may be provided on the back surface of the cushioning material, such as a solid EPDM plate member or an adhesive sheet. [Example]

[0044] The compression characteristics of the elastic body included in the cushioning material of the present invention were measured using a compression tester. As samples, the compression characteristics of four types of elastic bodies were measured: a cylindrical elastic body having a diameter of 25 mm and a thickness of 4.5 mm (Example 1), a cylindrical elastic body having a diameter of 25 mm and a thickness of 5.5 mm (Example 2), a cylindrical elastic body having a diameter of 25 mm and a thickness of 6.0 mm (Example 3), and a plate-like elastic body having a thickness of 25 mm (Comparative Example 1). The elastic bodies of Examples 1 to 3 were made of sponge-like (porous) EPDM, and the elastic body of Comparative Example 1 was made of urethane foam resin.

[0045] The method for measuring the compression characteristics of the elastic bodies of Examples 1 to 3 will be described with reference to Fig. 8(a). Fig. 8(a) is a diagram showing a measurement mode when measuring the compression characteristics of a cylindrical elastic body. The compression characteristics of the cylindrical elastic body 2 are measured by the following procedure. 1. Three cylindrical elastic bodies 2 are set in parallel on a fixing jig 31. 2. Compression jig 32 (contact area 20 cm) against the middle elastic body 2 2 ) is lowered in the compression direction Dp at a speed of 20 mm / min, and the compression load value is measured at a predetermined compression amount Lp. Note that the compression load value was measured twice in advance, and the compression load value at the third compression was used.

[0046] The method for measuring the compression characteristics of the elastic body of Comparative Example 1 will be described with reference to Fig. 8(b). Fig. 8(b) is a diagram showing a measurement mode when measuring the compression characteristics of a plate-like elastic body. The compression characteristics of the plate-like elastic body 12 are measured by the following procedure. 1. The cut-out cushioning material 11 (plate-shaped elastic body 12) is set in the fixing jig 31. 2. A compression jig 32 (contact area 20 cm) is placed on the elastic body 12. 2 ) is lowered in the compression direction Dp at a speed of 20 mm / min, and the compression load value at a predetermined compression amount Lp is measured. As in Examples 1 to 3, preliminary measurements were performed twice, and the compression load value at the third compression was used.

[0047] 9 to 12 show the measurement results of the compression characteristics of the elastic bodies of Examples 1 to 3 and Comparative Example 1, respectively. For the elastic body of Example 1, the compression load value was 11 N / 100 mm at a compression amount of 2 mm, and 28 N / 100 mm at a compression amount of 5 mm (see FIG. 9). For the cushioning material of Example 2, the compression load value was 16 N / 100 mm at a compression amount of 2 mm, and 42 N / 100 mm at a compression amount of 5 mm (see FIG. 10). For the cushioning material of Example 3, the compression load value was 19 N / 100 mm at a compression amount of 2 mm, and 59 N / 100 mm at a compression amount of 5 mm (see FIG. 11). On the other hand, for the cushioning material of Comparative Example 1, the compression load value was 68 N / 100 mm at a compression amount of 2 mm (see FIG. 12).

[0048] Comparing the results of Examples 1 to 3 with the results of Comparative Example 1 for the compression load values at a compression amount of 2 mm, the compression load values for Examples 1 to 3 are 10 to 20 N / 100 mm, while the compression load value for Comparative Example 1 is approximately 70 N / 100 mm. In other words, the compression load amount required to compress Examples 1 to 3 by a certain amount is 1 / 7 to 2 / 7 of the compression load amount for Comparative Example 1, and it is clear that the elastic bodies of Examples 1 to 3 are significantly more flexible than the elastic body of Comparative Example 1, which is a conventional product. Conversely, when a club comes into contact with the mat during ball hitting and a predetermined load is applied, a mat equipped with the cushioning material of the present invention is significantly more easily deformed than a mat equipped with a conventional cushioning material, and is therefore thought to have a superior impact feel, such as the sense of release of the club.

[0049] Although the cushioning material and golf practice mat of the present invention have been described above using the drawings, they are not limited to the above-mentioned configurations. [Industrial Applicability]

[0050] The cushioning material and golf practice mat of the present invention, when installed at a golf practice range, allow a golfer to get the same hitting feeling as when actually hitting a ball on a golf course, and since the manufacturing cost and repair work are low, they can be widely used as a cushioning material for golf practice mats and a golf practice mat. [Explanation of symbols]

[0051] 1 Cushioning material 2, 2a, 2b Elastic body 2' cavity 3. Golf practice mat 4 Artificial grass 41 Turf materials 42 Base material 5. Lifting Tee 6. Position 7 Ball 8 Club Head 9 ground 10 Frame 10a, 10b Frame members 11 Cushioning material 12 Elastic Body 13 Golf practice mat 21 Cushioning material 31 Fixture 32 Measuring Jig 101 Maximum surface Lc: Length of the long side Wc: Length of the short side Do diameter Di Inner diameter S Launch direction Ha Height Lp compression amount Dp Compression direction

Claims

1. A cushioning material for a golf practice mat to be placed under the artificial turf of a golf practice mat used for golf swing practice, The cushioning material for the golf practice mat has a plurality of cylindrical elastic bodies, The elastic bodies are arranged in parallel with their outer peripheral surfaces in contact with each other, 1. A cushioning material for a golf practice mat, wherein the elastic body is a porous body of EPDM.

2. 2. The cushioning material for golf practice mats according to claim 1, wherein the elastic body has a compressive load value of 5 to 30 N / 100 mm when compressed 2 mm from the radially outer side.

3. 3. The cushioning material for a golf practice mat according to claim 1, wherein the elastic body has a diameter of 2 cm to 4 cm.

4. The cushioning material for the golf practice mat has a frame body surrounding the plurality of elastic bodies, The frame has a compressive elastic modulus measured by JIS K7181 method that is higher than that of the elastic body, 4. The cushioning material for a golf practice mat according to claim 1, wherein the frame is provided at a lower portion of the outer periphery of the cushioning material for a golf practice mat.

5. 5. A golf practice mat having a rectangular planar shape, comprising the cushioning material for golf practice mats according to claim 1 and the artificial turf placed on the cushioning material for golf practice mats, A golf practice mat characterized in that the elastic bodies are arranged in parallel along the short side direction of the golf practice mat, and the long axis direction of the elastic bodies coincides with the long side direction of the golf practice mat.

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