Swing practice mat and its manufacturing method

Abstract

To provide a swing training mat which allows a user to acquire sensation similar to sensation when a user performs swing on a tatami mat.SOLUTION: A swing training mat 1 comprises: a front layer material 11 on which soles of a user are mounted; and a plate-shaped substrate 12 which is fixed to a lower face side of the front layer material 11 and supports the front layer material 11 from a lower side, the front layer material 11 is formed of a tatami surface, and the substrate 12 is formed by laminating, a plurality of tatami surfaces (a first substrate 12a, a second substrate 12b and a third substrate 12c). A direction of a mesh of the tatami surface forming one layer on the substrate 12 (for example, the tatami surface forming the first substrate 12a) and a direction of a mesh of the tatami surface (for example, the tatami surface forming the second substrate 12b) forming another layer which is laminated on an upper or lower side of the one layer, are made orthogonal preferably.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a swing practice mat used when practicing swings in baseball, golf, etc., and a method for manufacturing the same. [Background technology]

[0002] When practicing swings in baseball, golf, etc., on the ground, the soles of the feet are slippery, making it difficult to grasp the feeling of improving the sharpness of the hips. For this reason, swing practice is performed on a rubber mat (swing practice mat) that makes the soles of the feet less slippery. For example, a swing practice mat of this type is proposed in Patent Document 1. However, this type of swing practice mat does not effectively train the toes.

[0003] By the way, there is a famous story that Sadaharu Oh, the world record holder for the number of career home runs, used to practice swinging a bat barefoot on a tatami mat when he was still an active player. It is said that he perfected his signature "one-legged batting style" on a tatami mat. By practicing swinging barefoot on a tatami mat, you can effectively train your toes. Specifically, you can practice swinging while clearly imagining the sensation of firmly gripping the tatami mat with your toes to build up twisting force when twisting your hips, and the sensation of releasing the twisting force by loosening your grip on the tatami mat with your toes.

[0004] In addition to Sadaharu Oh, Shigeo Nagashima and Hideki Matsui are also said to have practiced on tatami mats. In recent years, players of the Tohoku Rakuten Golden Eagles are said to be practicing in tatami rooms. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 03-009771 Summary of the Invention [Problem to be solved by the invention]

[0006] Thus, the usefulness of practicing swings on tatami mats is known. However, if you practice swings on tatami mats, the tatami mats will quickly become damaged, and you will need to replace them frequently. It would be ideal if there was a swing practice mat that would give you the feeling of swinging on a tatami mat, but such a swing practice mat has not been proposed until now.

[0007] The present invention has been made to solve the above problems, and aims to provide a swing practice mat that allows the player to feel as if they were swinging on a tatami mat. Another object of the present invention is to provide a method for manufacturing this swing practice mat. [Means for solving the problem]

[0008] The above issues are: A surface material for placing the sole of the foot; A plate-shaped base material is fixed to the underside of the surface material and supports the surface material from below. A swing practice mat comprising: The surface material is formed by tatami mats, The base material is made of multiple laminated tatami mats. A swing practice mat characterized by This is solved by providing

[0009] In the swing practice mat of the present invention, the surface material on which the sole of the foot rests is formed of tatami mat (woven mat made of rush grass). Therefore, by using the swing practice mat of the present invention to practice swinging, it is easy to clearly imagine the sensation of firmly gripping the tatami surface with the toes to store the twisting force when twisting the waist, and the sensation of releasing the twisting force by loosening the grip of the tatami surface with the toes. Therefore, the toes can be effectively trained.

[0010] In addition, in a general tatami mat, the part (internal material) corresponding to the base material is formed of insulation boards or the like made of compressed wood fibers, whereas in the swing practice mat of the present invention, the part (internal material) corresponding to the base material is structured by laminating a plurality of tatami mat surfaces (mats woven with rush). In other words, not only the surface material but also the base material (internal material) is formed of tatami mat surfaces. This gives the swing practice mat a moderate flexibility, making it easier to fit the soles of the feet than when standing on a general tatami mat. This makes it easier to firmly grip the surface material (tatami mat surface) with the toes, making it easier to generate the above-mentioned twisting force. This makes it possible to effectively train the trunk. In addition, by giving such flexibility to the swing practice mat, even when the swing practice mat is placed on an uneven installation surface (uneven installation surface) such as the ground, it is possible to fit the swing practice mat to the installation surface and prevent it from shifting.

[0011] In the swing practice mat of the present invention, the grain direction of the multiple tatami mat sheets constituting the base material may be all the same, but it is preferable to make them alternate. In other words, it is preferable to make the grain direction of the tatami mat sheet forming one layer of the base material perpendicular to the grain direction of the tatami mat sheet forming another layer overlapping the above or below the first layer. This allows the rushes forming the tatami mat sheets of each layer to bite into each other, making it difficult for the stacked tatami mat sheets to slip between the layers. It is also possible to impart stiffness to the swing practice mat so that it does not easily break. It is also possible to increase the dimensional stability of the swing practice mat.

[0012] In the swing practice mat of the present invention, the surface layer may be directly layered on the upper surface of the base material. However, when a strong person such as a professional baseball player swings on the swing practice mat, the surface layer may shift horizontally relative to the base material, which may damage the surface layer. For this reason, it is preferable to sandwich a surface layer restraining nonwoven fabric between the surface layer and the base material to prevent the surface layer from shifting horizontally relative to the base material. This makes it possible to increase the durability of the swing practice mat.

[0013] In the swing practice mat of the present invention, it is also preferable to fix an edge member along the peripheral portion of the surface layer material and the base material, which not only improves the appearance of the swing practice mat but also reinforces the peripheral portion of the swing practice mat.

[0014] In the swing practice mat of the present invention, it is also preferable to fix an anti-slip sheet to the underside of the base material so as to prevent the base material from shifting horizontally relative to the installation surface (floor surface, etc.). It is preferable that the swing practice mat of the present invention is made light and easily portable so that the place of use can be changed, and by using the above-mentioned anti-slip sheet, it is possible to prevent the swing practice mat from shifting relative to the installation surface when the swing practice mat is used, even if the swing practice mat is made light.

[0015] In the swing practice mat of the present invention, it is also preferable to provide a cut on the bottom side of the base material that crosses the base material in a predetermined direction, so that the entire mat can be folded along the cut. This allows the swing practice mat to be folded compactly and stored when not in use. In addition, the swing practice mat can be folded compactly when carrying it around.

[0016] However, when the above-mentioned cut-out configuration is adopted, loads tend to concentrate on the cut-outs when the swing practice mat is in use (when practicing swinging), and the swing practice mat may break at the cut-outs. For this reason, it is preferable to apply a reinforcing surface material to the cut-outs on the lower surface of the base material. This makes it possible to maintain the durability of the swing practice mat even when the base material has cut-outs. Effect of the Invention

[0017] As described above, the present invention makes it possible to provide a swing practice mat that allows the golfer to feel as if he or she is swinging on a tatami mat. It also makes it possible to provide a method for manufacturing the swing practice mat. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a state in which swing practice is being performed using the swing practice mat of a first embodiment; [Diagram 2] 1 is an exploded perspective view showing a layer structure of a swing practice mat according to a first embodiment. FIG. [Diagram 3] 2 is an enlarged cross-sectional view showing the swing practice mat of the first embodiment cut along a plane perpendicular to the mat. FIG. [Figure 4] FIG. 10 is an exploded perspective view showing a layer structure of a swing practice mat according to a second embodiment. [Diagram 5] 11 is an enlarged cross-sectional view showing a swing practice mat of a second embodiment cut along a plane perpendicular to the mat. FIG. [Figure 6] 13A to 13C are perspective views showing a step-by-step process of folding a swing practice mat according to a third embodiment. [Figure 7] 13 is an enlarged cross-sectional view showing the periphery of a cut in a swing practice mat of a third embodiment, taken along a plane perpendicular to the surface of the swing practice mat. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] A preferred embodiment of the swing practice mat of the present invention will be described in more detail with reference to the drawings. In the following, the swing practice mat of the present invention will be described with reference to three embodiments from the first embodiment to the third embodiment, but the technical scope of the swing practice mat of the present invention is not limited to these embodiments. The swing practice mat of the present invention can be appropriately modified within the scope of the invention.

[0020] 1. Swing practice mat of the first embodiment First, the swing practice mat of the first embodiment will be described. Fig. 1 is a perspective view showing a swing practice using the swing practice mat 1 of the first embodiment. Fig. 2 is an exploded perspective view showing a layer structure of the swing practice mat 1 of the first embodiment. Fig. 3 is an enlarged cross-sectional view showing the swing practice mat 1 of the first embodiment cut along a plane perpendicular to the first embodiment.

[0021] As shown in FIG. 1, the swing practice mat 1 of the present invention is for practicing swinging while standing on its upper surface. This swing practice mat 1 is used in a state where it is laid on the floor surface or the ground (installation surface). As described later, the upper surface (the surface on which the soles of the feet are placed) of this swing practice mat 1 is formed of a tatami surface. Therefore, by using this swing practice mat 1, it is possible to practice swinging while obtaining a feeling similar to that of swinging on a tatami mat, or a better feeling than when swinging on a tatami mat. This makes it possible to effectively increase swing power, such as efficiently improving swing speed.

[0022] There is no particular limitation on the shape (shape in plan view) of the swing practice mat 1. In the swing practice mat 1 of the first embodiment, the shape in plan view is rectangular (oblong), but other shapes such as a triangle, a square, a trapezoid, a rhombus, or an ellipse may also be used.

[0023] The swing practice mat 1 is sized so that both feet do not extend beyond the mat when standing on it and swinging. For example, in a baseball swing (batting), when weight is transferred (stepping in) from the pivot foot (right foot for a right-handed player) to the front foot (left foot for a right-handed player), the front foot often lands at a position 50 cm or more away from the pivot foot. Also, in a golf swing, both feet are often spread about shoulder width apart (about 50 cm). For this reason, the vertical length (length along the longitudinal direction) of the swing practice mat 1 needs to be 50 cm or more. The vertical length of the swing practice mat 1 is preferably 80 cm or more, and more preferably 100 cm or more.

[0024] Furthermore, the size of a person's foot (length from heel to toe) is often 25 cm or more. For this reason, it is preferable that the width (length along the short side) of swing practice mat 1 is 30 cm or more. It is more preferable that the width of swing practice mat 1 is 40 cm or more, and even more preferable that it is 45 cm or more.

[0025] However, if the dimensions of the swing practice mat 1 are too large, the swing practice mat 1 becomes too large and difficult to carry. For this reason, the length of the swing practice mat 1 is usually set to 200 cm or less, and the width of the swing practice mat 1 is usually set to 100 cm or less. The swing practice mat 1 of the first embodiment is designed for baseball swing practice, so the dimensions are set to be larger. Specifically, the length is set to 150 cm, and the width is set to 85 cm. In contrast, if golf swing practice is designed, the dimensions can be made smaller. Specifically, the length can be set to about 120 cm, and the width can be set to about 50 cm.

[0026] The thickness of the swing practice mat 1 is not particularly limited. However, if the swing practice mat 1 is thin, it is difficult to impart stiffness and durability to the swing practice mat 1. For this reason, the thickness of the swing practice mat 1 is preferably 5 mm or more, and more preferably 8 mm or more. However, if the swing practice mat 1 is too thick, the swing practice mat 1 may become heavy and difficult to carry. For this reason, the thickness of the swing practice mat 1 is preferably 20 mm or less, and more preferably 15 mm or less. In the swing practice mat 1 of the first embodiment, the thickness is set to about 10 mm.

[0027] The weight of the swing practice mat 1 is not particularly limited. However, if the swing practice mat 1 is too light, not only is it difficult to impart strength to the swing practice mat 1, but the swing practice mat 1 may move when a swing is made on it. For this reason, the weight of the swing practice mat 1 is preferably 2 kg or more, and more preferably 3 kg or more. However, if the swing practice mat 1 is too heavy, it becomes difficult to carry the swing practice mat 1. For this reason, the weight of the swing practice mat 1 is preferably 10 kg or less, and more preferably 7 kg or less. In the swing practice mat 1 of the first embodiment (assuming baseball swing practice), the weight is set to about 5 kg. In contrast, in the swing practice mat 1 assuming golf swing practice, the weight can be set to about 3.5 kg.

[0028] As shown in Fig. 1, the swing practice mat 1 of the first embodiment is composed of a plate-shaped mat body 10 and an edge member 20 attached along the periphery of the mat body 10. As shown in Fig. 2, the mat body 10 is composed of a surface layer 11, a base material 12, and an anti-slip sheet 13. In this way, the mat body 10 has a structure in which a plurality of members are layered, and the edge member 20 reinforces the periphery of the mat body 10 to prevent the mat body 10 from coming apart.

[0029] 1.1 Surface material The surface layer 11 is a planar member that forms the upper surface of the mat body 10, and is the portion that comes into direct contact with the soles of the feet of a person practicing a swing on the swing practice mat 1. As shown in FIG. 2, this surface layer 11 is formed of a tatami mat surface. The tatami mat surface has a structure in which a plurality of rushes 11a are woven while being crossed with a plurality of warp threads 11b. Examples of the types of warp threads 11b include single cotton thread, double cotton thread, single linen thread, or double linen thread, and the swing practice mat 1 of the first embodiment uses single cotton thread or double cotton thread as the warp thread 11b.

[0030] On the other hand, the rush used for tatami mats is generally cut to a length of about 100 to 150 cm, and it is preferable to use long rush rather than short rush because it improves the appearance of the tatami mat. Also, tatami mats are classified into mesh-type rush, in which one warp thread is woven into one stitch, and pull-type rush, in which two warp threads are woven into one stitch. Pull-type rush is more durable and has a deeper weave, so it can be used preferably as the surface material 11 of the swing practice mat 1.

[0031] Furthermore, while a typical tatami mat (a popular tatami mat) has a weave density of about 4000 threads, the tatami mat used as the surface material 11 of the swing practice mat 1 has a weave density of 5000 threads or more, and more preferably 6000 threads or more. This not only improves the appearance of the surface material 11a, but also makes it possible to increase the durability of the surface material 11a. In the swing practice mat 1 of the first embodiment, a tatami mat with a weave density of 6500 threads is used as the surface material 11a.

[0032] In this way, by forming the surface layer 11 with a tatami surface, as shown in FIG. 1, it is possible to repeatedly form convex ridges α1 where the rushes 11a rise and concave grooves α2 where the rushes 11b fall on the surface (upper surface) of the surface layer 11. Also, fine narrow grooves (mesh) can be formed at the boundaries between adjacent rushes 11a. By standing barefoot on the upper surface of the surface layer 11 having such a surface structure and practicing swinging, it is possible to effectively strengthen the toes. It is also possible to strengthen the trunk.

[0033] 1.2 Base material The base material 12 is a plate-like member for supporting the surface layer material 11 from the lower surface side. The surface layer material 11 may be simply laid on the upper surface of the base material 12. In this case, however, the surface layer material 11 (particularly the central portion away from the edge member 20) will rise up from the base material 12, and the surface layer material 11 will shift horizontally relative to the base material 12, making the lower surface of the surface layer material 11 and the upper surface of the base material 12 more likely to wear away. This may reduce the durability of the swing practice mat 1.

[0034] For this reason, it is preferable that the lower surface of the surface layer material 11 is fixed to the upper surface of the base material 12. Examples of a method for fixing the surface layer material 11 to the base material 12 include sewing and adhesion. However, if the central portion of the surface layer material 12 (the portion not covered by the edge member 20) is sewn to the base material 12, the sewing thread is exposed on the upper surface side of the surface layer material 11, which may deteriorate the appearance of the swing practice mat 1. For this reason, in the swing practice mat 1 of the first embodiment, the surface layer material 11 is adhered to the base material 12. Examples of the adhesive to be used include a latex adhesive, a solvent adhesive, and a reactive adhesive.

[0035] However, if the adhesive is applied thickly over substantially the entire lower surface of the surface material 11 or the upper surface of the base material 12, the breathability of the swing practice mat 1 will be hindered, and mold may grow on the swing practice mat 1. For this reason, it is preferable to apply the adhesive in a thin, spread state so as not to hinder the breathability of the swing practice mat 1. In the swing practice mat 1 of the first embodiment, the latex-type adhesive is applied thinly using a spray gun.

[0036] The base material 12 has a multi-layer structure in which a plurality of tatami facings are laminated. In the swing practice mat 1 of the first embodiment, as shown in Fig. 2 and Fig. 3, the base material 12 is composed of three layers, a first base material 12a, a second base material 12b, and a third base material 12c, and each of the first base material 12a, the second base material 12b, and the third base material 12c is a tatami facing (a tatami facing formed by weaving rush into the warp threads) similar to that used for the surface layer material 11.

[0037] In this way, by forming not only the surface layer 11 but also the base material 12 arranged on the underside of it from tatami mat surface, it is possible to give the swing practice mat 1 an appropriate degree of flexibility. This makes it easier for the soles of the feet to fit on the swing practice mat 1, and it is possible to firmly grip the surface layer (tatami mat surface) with the toes. This makes it easier to feel the twisting force. It also makes it possible to accentuate the pleasant aroma of the rush grass.

[0038] The first substrate 12a, the second substrate 12b, and the third substrate 12c constituting the substrate 12 may be simply stacked on top of each other, but are usually fixed together and integrated. Examples of a method for fixing the first substrate 12a, the second substrate 12b, and the third substrate 12c to each other include sewing and adhesion. Unlike the above-mentioned fixing of the surface layer material 11 to the substrate 12, even if the first substrate 12a, the second substrate 12b, and the third substrate 12c are sewn together, the sewing thread is not exposed to the outside. Therefore, sewing can be suitably adopted for fixing the first substrate 12a, the second substrate 12b, and the third substrate 12c.

[0039] In the swing practice mat 1 of the first embodiment, the first base material 12a, the second base material 12b, and the third base material 12c are bonded together and then sewn together. This makes it possible to firmly integrate the first base material 12a, the second base material 12b, and the third base material 12c, thereby increasing the durability of the base material 12. The bonding is performed in the same manner as the surface layer material 11 for the base material 12 described above. Meanwhile, the sewing is performed in a line at intervals of about 20 cm (10 to 30 cm).

[0040] Meanwhile, the surface layer material 11 and the base material 12 (first base material 12a, second base material 12b, and third base material 12c) made of tatami mats all have grains that run in the direction of the rush grass, but in the swing practice mat 1 of the first embodiment, the grain direction of the first base material 12a is set so as not to be the same as the grain direction of the surface layer material 11. Specifically, as shown in FIG. 2, the grain direction of the surface layer material 11 is shifted by 90° from the grain direction of the first base material 12a. For this reason, the lower surface of the surface layer material 11 is engaged with the upper surface of the first base material 12a, making it difficult for the surface layer material 11 to shift horizontally relative to the first base material 12a.

[0041] For the same reason, the grain direction of the tatami mat surface is not the same for the vertically adjacent layers of the first substrate 12a, second substrate 12b, and third substrate 12c that make up the substrate 12. Specifically, as shown in Fig. 2, the grain direction of the second substrate 12b is shifted by 90° from the grain direction of the first substrate 12a, and the grain direction of the third substrate 12c is shifted by 90° from the grain direction of the second substrate 12b.

[0042] In this way, by orthogonally ...

[0043] In the swing practice mat 1 of the first embodiment, the base material 12 is composed of three tatami facings, but the number of tatami facings constituting the base material 12 is not limited to this. However, if the number of tatami facings constituting the base material 12 is too large, the manufacturing cost of the swing practice mat 1 increases. In addition, the swing practice mat 1 becomes heavy, making it difficult to carry. For this reason, the number of tatami facings constituting the base material 12 is usually set to 10 or less. The number of tatami facings constituting the base material 12 is preferably set to 7 or less, and more preferably set to 5 or less.

[0044] 1.3 Anti-slip sheet The anti-slip sheet 13 is a planar member that forms the lower surface (bottom surface) of the mat body 10, and serves to prevent the swing practice mat 1 from shifting horizontally relative to the floor surface or the like (installation surface). This increases the installation stability of the swing practice mat 1, and prevents the swing practice mat 1 from moving even if a strong swing is made on the upper side of the swing practice mat 1.

[0045] The material of the anti-slip sheet 13 is not particularly limited as long as the friction coefficient with respect to the installation surface such as the floor surface is greater than that of a tatami mat. Examples of the anti-slip sheet 13 include nonwoven fabric and rubber sheets. A plurality of anti-slip protrusions may be provided on the underside of the anti-slip sheet 13. In the swing practice mat 1 of the first embodiment, a sheet in which a large number of anti-slip protrusions 13a (see Figs. 6(b) and (c) below) made of a latex-based material are embedded in the nonwoven fabric is used as the anti-slip sheet 13.

[0046] 1.4 Edge members The edge member 20 not only improves the appearance of the swing practice mat 1, but also has the function of reinforcing the peripheral portion of the swing practice mat 1 (mat body 10). That is, as described above, the mat body 10 has a structure in which a plurality of tatami facings (surface material 11, first base material 12a, second base material 12b, and third base material 12c) and the like are laminated, and by wrapping the edges of these tatami facings and the like with the edge member 20, the cut ends of these tatami facings and the like are prevented from being exposed and from being worn.

[0047] The material used for the edge member 20 is not particularly limited, but it is preferable to use a material used as the "tatami edge" of a general tatami mat (a fabric made of natural threads (cotton threads, linen threads, etc.) or a fabric made of synthetic threads that has been waxed). This allows the swing practice mat 1 to have a luxurious appearance. The edge member 20 may be plain, or may have a pattern. The tatami member 10 is attached to the mat body 10 by stapling, sewing, or adhesive. However, while a general tatami mat has a tatami edge (edge ​​member 20) attached only along the long sides, the swing practice mat 1 of the first embodiment has edge members 20 attached also along the short sides.

[0048] 1.5 Application The swing practice mat 1 of the first embodiment described above can be used for various swing practice. In addition to baseball swing (batting) practice, this swing practice mat 1 can also be suitably used for golf and tennis swing practice. Since the swing practice mat 1 of the first embodiment is portable, it can be brought to a necessary place when and where it is needed for swing practice. In addition, when not in use, it can be stored in a place where it will not get in the way.

[0049] 2. Swing practice mat of the second embodiment Next, a swing practice mat of a second embodiment will be described. The swing practice mat of the second embodiment will be described focusing on the configuration different from the swing practice mat 1 of the first embodiment (FIGS. 1 to 3) described above. For the configuration of the swing practice mat of the second embodiment that is not specifically mentioned, the same configuration as that described for the swing practice mat 1 of the first embodiment can be adopted.

[0050] Fig. 4 is an exploded perspective view showing a layer structure of swing practice mat 1 of the second embodiment. Fig. 5 is an enlarged cross-sectional view showing swing practice mat 1 of the second embodiment cut along a plane perpendicular to the mat.

[0051] In the swing practice mat 1 of the first embodiment, as shown in Fig. 2 and Fig. 3, nothing is interposed between the surface layer 11 and the base material 12, and the lower surface of the surface layer 11 and the upper surface of the base material 12 (the upper surface of the first base material 12a) are directly bonded. In addition, the grain direction of the tatami surface forming the surface layer 11 is different from the grain direction of the tatami surface forming the first base material 12a, and the rush forming the tatami surface of the surface layer 11 and the rush forming the tatami surface of the first base material 12a are interlocked with each other to prevent the surface layer 11 from shifting horizontally relative to the base material 12. However, when a strong player such as a professional baseball player swings on the swing practice mat 1, the surface layer 11 slides against the first base material 12a, and the surface layer 11 and the first base material 12a may be rubbed and damaged.

[0052] In contrast, in the swing practice mat 1 of the second embodiment, as shown in Fig. 4 and Fig. 5, a surface material restraining nonwoven fabric 14 is sandwiched between the surface layer material 11 and the base material 12. This makes the surface layer material 11 less slippery against the first base material 12a, and the surface layer material 11 and the first base material 12a are less likely to rub against each other. This makes it possible to increase the durability of the swing practice mat 1. In addition, it is possible to increase the cushioning of the mat body 10 (swing practice mat 1) and make the mat body 10 fit the sole of the foot even better.

[0053] The upper surface of the surface material restraining nonwoven fabric 14 is fixed to the lower surface of the surface material 11, and the lower surface of the surface material restraining nonwoven fabric 14 is fixed to the upper surface of the base material 12 (the upper surface of the first base material 12a). The method of fixing the surface material restraining nonwoven fabric 14 to the surface material 11 and the first base material 12a is not particularly limited. The surface material restraining nonwoven fabric 14 can be fixed, for example, by the same method as that used when fixing the surface material 11 and the base material 12 in the swing practice mat 1 of the first embodiment. In the swing practice mat 1 of the second embodiment, a latex-type adhesive is thinly applied over substantially the entire surface of the lower surface of the surface material 11 or the upper surface of the surface material restraining nonwoven fabric 14, and substantially the entire surface of the lower surface of the surface material restraining nonwoven fabric 14 or the upper surface of the first base material 12a, to bond these members to each other.

[0054] 3. Swing practice mat according to the third embodiment Next, a swing practice mat of a third embodiment will be described. The swing practice mat of the third embodiment will be described focusing on configurations different from the swing practice mat 1 of the first embodiment (FIGS. 1 to 3) and the swing practice mat 1 of the second embodiment (FIGS. 4 and 5). Configurations of the swing practice mat of the third embodiment that are not specifically mentioned can be similar to those described for the swing practice mat 1 of the first embodiment and the swing practice mat 1 of the second embodiment.

[0055] Fig. 6 is a perspective view showing a step-by-step manner in which swing practice mat 1 of the third embodiment is folded. Fig. 7 is an enlarged cross-sectional view showing the periphery of cut β in swing practice mat 1 of the third embodiment cut along a plane perpendicular to the surface of the swing practice mat.

[0056] As shown in Fig. 6, the swing practice mat 1 of the third embodiment has a cut β on the bottom side of the substrate 12. This cut β is formed across the substrate 12 in the short direction. Also, as shown in Fig. 7, this cut β is provided in a state of penetrating the substrate 12 (first substrate 12a, second substrate 12b, and third substrate 12c) in the thickness direction. The anti-slip sheet 13 and the surface material restraining nonwoven fabric 14 are also divided at the portions overlapping the cut β. However, the surface material 11 is connected even at the portions overlapping the cut β.

[0057] By adopting such a structure, the swing practice mat 1 of the third embodiment can be folded along the slit β from the state shown in Fig. 6(a) (unfolded state) through the state shown in Fig. 6(b) (state in the middle of folding) to the state shown in Fig. 6(c) (folded state). Therefore, the swing practice mat 1 can be folded compactly when storing or transporting.

[0058] However, if the base material 12 has a cut β, the load applied to the swing practice mat 1 from the sole of the foot when standing on the swing practice mat 1 and swinging tends to be concentrated on the cut β. This may cause the surface material 11 to break at a location along the cut β. In this regard, in the swing practice mat 1 of the third embodiment, as shown in Figs. 6(b), (c) and 7, a reinforcing surface material 15 is applied to a location along the cut β on the underside of the base material 12. This makes it difficult for the surface material 11 to break at the location along the cut β.

[0059] A fabric with high tensile strength is usually used as the reinforcing surface material 15. Examples of such fabric include fabrics woven with natural or synthetic threads. As shown in Fig. 7, this reinforcing surface material 15 is placed across the base material 12 (third base material 12c) on both sides of the cut β, and the upper surface of the reinforcing surface material 15 is bonded to the lower surface and end surface of the base material 12 and the lower surface of the portion of the surface material 11 that overlaps the cut β, thereby reinforcing the area of ​​the swing practice mat 1 along the cut β.

[0060] As described above, the base material 12 is cut along the cut line β, and when the swing practice mat 1 is unfolded (FIG. 6(a)), the cut end surface γ1 (FIG. 7) and the cut end surface γ2 (FIG. 7) of the base material 12 come into contact with each other. For this reason, if the cut end surfaces γ1 and γ2 are not made flat (if the surfaces are not exposed), when the swing practice mat 1 is unfolded, the area along the cut line β of the swing practice mat 1 will rise, and the swing practice mat 1 will not be flat. However, when cutting a tatami mat laminate such as the base material 12, it is not easy to make the cut end surface flat. In particular, if the cut end surface δ in FIG. 4 is not made flat, the cut end surface δ a As shown in Fig. 1, it is not easy to cut the rush 11a forming the tatami mat neatly along its longitudinal direction. b As shown in FIG. 1, it is relatively easy to neatly cut the rush 11a that forms the tatami facing in a direction perpendicular to the rush 11a.

[0061] In this regard, in the swing practice mat 1 of the third embodiment, similarly to the swing practice mat 1 of the second embodiment (FIG. 4), the tatami facings of the layers (first substrate 12a, second substrate 12b, and third substrate 12c) of the substrate 12 are staggered, and the cut end surfaces γ1 and γ2 (FIG. 7) of the first substrate 12a and the third substrate 12c are easily exposed. b (FIG. 4), and the second base material 12b disposed therebetween is difficult to produce a surface at the cut end surface δ a(Figure 4). In this way, by sandwiching the layer that is difficult to present between layers that are easy to present, it becomes easier to present the plane of the cut end surfaces γ1, γ2 as a whole. Therefore, when the swing practice mat 1 is unfolded, it is possible to prevent the areas along the cuts β in the swing practice mat 1 from swelling up.

[0062] In the swing practice mat 1 of the third embodiment, only one slit β is provided, and the swing practice mat 1 is structured to be folded in two. However, the number of slits β and the folding manner of the swing practice mat 1 are not limited to this. For example, it is also possible to provide two parallel slits β at a predetermined interval, and to structure the swing practice mat 1 so that it can be folded in three. [Explanation of symbols]

[0063] 1 Swing practice mat 10 Mat body 11 Surface material 11a Igusa 11b Warp thread 12 Base material 12a First base material 12b Second base material 12c Third base material 13 Anti-slip sheet 13a Anti-slip protrusions 14 Non-woven fabric for restraining surface material 15 Reinforcing surface material 20 Edge members α1 convex part α2 concave groove β Cut γ-fold boundary

Claims

1. A surface material for placing the sole of the foot; A base material that is fixed to the underside of the surface material and supports the surface material from below. A swing practice mat comprising: The surface material is formed by tatami mats, The base material is made of multiple laminated tatami mats. A swing practice mat characterized by:

2. 2. The swing practice mat of claim 1, wherein the direction of the grain of the tatami facing forming one layer of the multiple tatami facings constituting the base material is perpendicular to the direction of the grain of the tatami facing forming another layer overlapping above or below the first layer.

3. 3. A swing practice mat according to claim 1 or 2, further comprising a nonwoven fabric for restraining the surface layer material, sandwiched between the surface layer material and the base material, for preventing the surface layer material from shifting horizontally relative to the base material.

4. 4. The swing practice mat according to claim 1, wherein an edge member is fixed along the peripheral edges of the surface material and the base material.

5. 5. A swing practice mat according to claim 1, further comprising an anti-slip sheet fixed to the underside of the base material to prevent the base material from shifting horizontally relative to the installation surface.

6. A cut is provided on the bottom surface side of the base material so as to cross the base material in a predetermined direction; The entire product can be folded along the cuts.

6. A swing practice mat according to claim 1.

7. 7. The swing practice mat of claim 6, wherein a reinforcing surface material is provided on the lower surface of the base material at locations along the cuts.

8. A method for manufacturing the swing practice mat according to any one of claims 1 to 7.

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