JP5678393B2 - Gymnastic crossing board - Google Patents

Description

  The present invention relates to a gymnastic railroad crossing board used for practice of jumping gymnastics performance such as a jumping box and a jumping horse or for competition.

  In the present specification, the terms “front” and “rear” are based on the running / jumping direction of Jim Nast who runs and jumps toward the crossing board.

  Conventionally, as this kind of level crossing plate, as shown in the following Patent Documents 1 and 2, a base plate portion of a base plate or a base plate and a base end portion of a base plate or a top plate are connected and fixed, and the base plate and the step plate A plate spring, a coil spring, or an elastic body such as foamed synthetic resin is widely used in general. Such a level crossing board accumulates force in the direction of pushing up against the athlete by elastic deformation of an elastic body such as a leaf spring, when the athlete jumps with both feet aligned at a position slightly closer to the front end of the step board whose upper surface is inclined. It is a powerful aid for jumping.

  On the other hand, this kind of railroad crossing board is widely used from the one for mainly practice for infants and children to the general competition for junior athletes and adult gymnasts. Accordingly, it is required to have various rebound resilience and shock absorption. If a relatively light weight person such as a child or a beginner uses a harder one, a sufficient repulsive force cannot be obtained, and conversely a relatively heavy person such as an adult or a skilled athlete is too soft Even if a thing is used, sufficient repulsive force cannot be obtained.

  Therefore, in the conventional product, in order to provide a crossing board suitable for a user in a practice field or a stadium, it is necessary to prepare a plurality of types of crossing boards having various rebound resiliences according to each. Of course, manufacturing and preparing such various level crossings is not only a factor in increasing the cost of the product, but also disadvantageous in that it occupies a large storage space. Furthermore, delicate adjustment of the resilience has been extremely difficult. Not only that, but especially for practicing infants and school children, since there is a hard tread on the upper surface, there is a high risk of injury and there is a problem in terms of safety.

Japanese Patent Laid-Open No. 8-155051 JP 2001-87412 A

  In view of the background art as described above, the present invention has excellent use safety and is particularly suitable for practice, and has optimal rebound resilience and shock absorption for a wide range of users from infants to adult gymnasts. Adjustable and fine-tuning can be easily performed so that it can be obtained in good harmony. As a result, it has a high versatility and can be provided at a relatively low price. The purpose is to provide.

  The present invention presents the configurations described in the following items [1] to [7] as means for achieving the above object.

[1] It has a base board whose upper surface is formed substantially upwardly toward the front, and a top mat that is stacked on and integrally joined to the base board,
The base board is made of a semi-rigid synthetic resin foam,
The top mat is a flat bag body in which a restriction space having a predetermined height is formed between opposing surfaces of the two airtight sheets by passing a large number of continuous yarns between the two upper and lower flexible airtight sheets. A crossing board for gymnastics, characterized in that the flat bag body is filled with compressed air to give high resilience.

  [2] The gymnastic railroad crossing board according to [1], wherein the top mat is detachably coupled to the base board via a separable coupling means.

  [3] The gymnastic railroad crossing board according to [2], wherein the top mat is configured such that a coupling position with respect to the base board can be changed in the front-rear direction.

  [4] The gymnastic railroad crossing board according to [2] or [3], wherein the coupling means is a hook-and-loop fastener that forms a pair of males and females.

[5] The base board according to any one of [1] to [4], wherein the base board is made of an ethylene vinyl acetate resin foam having a foaming ratio of 5 to 20 times and a 25% compression hardness of 6 to 30 N / cm ^2. Crossing board for gymnastics.

  [6] The gymnastic crossing board according to any one of [1] to [5], wherein the top mat has an apparent thickness of 30 to 150 mm.

  [7] The gymnastic crossing board according to any one of [1] to [6], wherein the top mat has a compressed air pressure set to 10 to 42 kPa.

  In the railroad crossing plate according to the above [1], it is composed of a combination of a semi-rigid base board made of a low-foaming synthetic resin and an air mat type top mat provided thereon. All of them are made of safe materials, and there is no exposure of hard wood members or metal members to the outside. Therefore, it has a high degree of safety and is particularly suitable for the practice of infants and school children. In addition, a semi-rigid base board made of low-foaming synthetic resin can ensure good laying stability, and the base board can be used even when it receives a strong impact from above that exceeds the elastic limit of the top mat. By exhibiting shock absorption, it is possible to ensure higher safety without causing bottoming. On the other hand, because the top mat on the top side exhibits good rebound resilience, it provides a level crossing board that combines both rebound resilience and shock absorption functions, and has excellent jumping assist characteristics and a feeling of use without bottoming. sell. And by adjusting the air pressure inside the top mat, you can freely change and fine-tune the resilience it has, so it is optimal for the user's weight, leg strength, and skill level Can have a repulsive force. As a result, it has a wide range of applications from infants to adult athletes and is excellent in versatility, and since it is not necessary to individually prepare and prepare many kinds of crossing boards with different rebound resilience, productivity is good, manufacturing cost and equipment Any aspect of the cost can be significantly reduced.

  In addition, the top mat mainly responsible for rebound resilience is compressed into a flat bag body that has a predetermined space inside by connecting a large number of connecting yarns between the upper and lower flexible airtight sheets. By providing the required rebound resilience by filling with air, not only has excellent rebound resilience, but also stable jumping by receiving the sole of the foot when the gymnast steps on the top surface strongly Enable. That is, it has excellent jump stability. Moreover, since the repulsive force by air pressure is used, the fatigue level given to the user is small even when jumping repeatedly, and the burden given to the knees and ankles is also small, so the amount of practice can be increased. Therefore, in combination with being able to fly in the air in a high and stable posture, it is suitable as a crossing board for practice for learning the technique of air performance.

  In addition, unlike conventional railroad crossings using springs made of metal or wood, there is no risk of material resilience due to repeated use or deterioration of resilience characteristics due to deterioration over time, and stable resilience can be maintained over a long period of time. Excellent.

  Furthermore, it is sufficiently lightweight as a whole, which is advantageous in terms of carrying and handling, and the top mat portion can be flattened into a sheet shape by removing the air, which is advantageous in storage and storage.

  In addition, by making the top mat detachable from the base board as described in the above [2], the top mat can be used alone as a hopping mat for practicing jumping rope, tumbling, etc. Can do. In addition, since it is possible to provide an air supply / exhaust port with a check valve for supplying and exhausting compressed air on the back side of the top mat, the air supply / exhaust port is not exposed on the top mat or the side surface of the top mat. It can also contribute to the improvement of appearance and safety.

  In addition, as described in the above item [3], when the position of the top mat to the base board can be changed in the front-rear direction, the top mat is attached to the base board while being largely shifted rearward. In addition, it can be suitably used as a safe tilting exercise tool mainly for back-rolling practice of infants and school children, that is, backward turning practice.

  In addition, as described in [4] above, by adopting a hook-and-loop fastener as a separable coupling means, it is possible to ensure a higher level of safety due to its flexibility and to obtain a sufficiently strong coupling force. Moreover, it is easy to attach and detach the top mat.

Further, as described in [5] above, by using an ethylene vinyl acetate resin foam having an expansion ratio of 5 to 20 times and a compression hardness of 6 to 30 N / cm ² as the base board, the above-described good Various effects such as ensuring stable laying stability, ensuring safety, and ensuring a good feeling of use that does not cause a bottom sensation can be achieved even better.

  Furthermore, as described in the above items [6] and [7], the thickness of the top mat is set in the range of 30 to 150 mm, and the pressure of the internally filled compressed air is set in the range of 10 to 42 kPa. Thus, it is possible to obtain a railroad crossing board having rebound resilience and shock absorption according to the weight and skill level of each user from infants to adult gymnast, and in which they are well harmonized.

It is the perspective view which showed the level crossing board which concerns on the Example of this invention by notching a part of top sheet. It is sectional drawing of the II-II line of FIG. It is the perspective view which isolate | separated and showed the base board and top mat of the level crossing board of FIG. It is a side view which shows an example of the use condition when shifting and using a top mat. It is a longitudinal cross-sectional view of a level crossing board according to another embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  In a crossing board (A) according to a preferred and basic implementation of the present invention shown in FIGS. 1 to 3, (1) shows a base board, and (2) shows a top mat attached on top of it.

  The base board (1) is made of a semi-rigid low-foamed synthetic resin foam and is generally formed to have a length of about 500 to 1000 mm and a width of about 500 to 700 mm. The upper surface is formed in an inclined surface (1a) having an ascending slope of 5 to 10 degrees, preferably 7 to 9 degrees from the rear end to the front end, and the height (h) of the front end surface is a length ( L) is set in a range of 80 to 160 mm.

The material of this base board (1) is required to be a semi-rigid low-foaming synthetic resin because it requires moderate elasticity, laying stability and light weight. It is not particularly limited. However, in view of various points such as material cost, durability, physical properties, and weight, it is recommended to use a low foam of ethylene vinyl acetate resin (EVA). Among the EVA low foams, the expansion ratio is 5 to 20 times, preferably 6 to 15 times, more preferably 7 to 10 times, and 25% compression hardness (JIS K6767) is 6 to 30 N / cm ² , preferably Is preferably 10 to 25 N / cm ² , more preferably 15 to 20 N / cm ² . Furthermore, the physical properties are such that the apparent density (JIS K6767) is 0.10 to 0.20 g / cm ³ , the tensile strength (JIS K6767) is 100 to 170 N / cm ² , and the elongation (JIS K6767) is 90 to 200%. What it has can be selected and used suitably.

  On the other hand, the top mat (2) is configured as a flat and flat air mat having a required thickness. Specifically, a large number of connecting yarns (23) are passed between the two upper and lower flexible airtight sheets (21) and (22), so that the space between the two airtight sheets (21) and (22) is opposed to each other. The flat bag body (20) is formed to form a regulation space (24) having a predetermined height. More specifically, the flat bag body (20) is formed by weaving a three-dimensional woven fabric by reciprocating a predetermined length of connecting yarn between two woven fabrics, and then forming ethylene vinyl acetate on both outer sides of the three-dimensional woven fabric. A hermetic material such as a resin composition is coated and impregnated or coated with heat lamination to impart airtightness, and this bag is processed into a flat bag shape.

  The top mat (2) has a supply / exhaust port (25) (see FIG. 3) having a built-in reverse valve that allows air flow only in the injection direction at the bottom corner. Then, an air pump is connected to the air supply / exhaust port (25), and compressed air is injected and filled into the restriction space (24) so as to obtain a specified set pressure by a pressure gauge, whereby the flat bag body is in a tension-expanded state. And is given a predetermined high rebound resilience.

  Here, the elastic repulsion force of the top mat (2) is determined by the air pressure filled and filled. A preferable range of the compressed air pressure is 10 to 42 kPa (1.45 to 6.09 psi), and an index as a recommended standard value is as follows.

For infants 10.3 to 15.2 kPa
For elementary school students 15.2 to 22.1 kPa
For female juniors 20.7-27.6kPa
For boys junior 20.7-34.5kPa
For adults 30.3-41.4kPa

  The length and width of the top mat (2) in the expanded state substantially correspond to the size of the base board (1), and the apparent thickness (t) is in the range of 30 to 150 mm, preferably 50 to 100 mm. Formed. Further, the apparent thickness of the top mat (2) may be formed such that the rear end portion becomes thinner as it reaches the rear end. In particular, in the case of an infant or school crossing board, if the height of the rear end of the top mat (2) is too high and there is a risk of catching a foot, it is extended to the rear end of the top mat (2). For example, a small swash plate having an upper surface made of a foamed synthetic resin made of the same material as that of the base board (1) and formed on a sloped surface may be detachably attached using a coupling means such as a fastener.

  The base board (1) and the top mat (2) should be joined together so that the gymnast does not cause a relative shift even if jumping on the top mat (2) while stepping strongly with the momentum of running. Must be firmly and integrally joined. As a connecting means for this purpose, it is not excluded that the adhesive is integrally joined. However, as a preferred connecting means, in the illustrated embodiment, a pair of male and female tape-shaped hook-and-loop fasteners (3a) and (3b) are used. Means (3) is employed, and two rows are arranged on the left and right. By adopting this hook-and-loop fastener, the top mat (2) is detachable from the base board (1), that is, detachable. As a result, as shown in FIG. 3, the air supply / exhaust port (25) is provided at one corner on the back side of the top mat (2), but the top mat (2) is removed and the air supply / exhaust port (25) is connected to the air pump. Making it possible. That is, it is safe to avoid exposing the air supply / exhaust port (25) to the outer surface of the top mat (2), and thus avoiding the athletes etc. directly touching the air supply / exhaust port (25) while using the crossing board. In addition to improving the appearance and appearance, the top mat (2) is removed and only it is laid on the floor, so that it can be used alone as a hopping mat for vertical jumping training and rope jumping practice. But it can be used.

  The above crossing board (A) is used adjacent to the rear of the jumping box or horse, and the gymnast that runs up jumps on the front part of the top mat (2) with both feet. The pressure receiving portion of the mat (2) is elastically deformed, and a large reaction force is given by the restoring force due to the uneven distribution of the internal compressed air, thereby strongly assisting the jumping of gymnast.

  Therefore, the rebound resilience is mainly given by the top mat (2), and the base board (1) prevents the unintentional movement on the floor surface, that is, secures the laying stability, and through the top mat (2). It also functions to prevent Jimmyst from feeling the bottom by elastically receiving the local impact transmitted.

  In addition, as shown in FIG. 4, the crossing board (A) is a gymnastic exercise having an inclined surface by assembling the top mat (2) with a predetermined distance behind the base board (1). As a tool, it is also preferably used mainly for reverse practice of infants and school children.

  FIG. 5 shows another embodiment.

  In this embodiment, the upper surface of the base board (11) is formed on the inclined surface (11a) only in the rear half part, and the front half part is formed on the horizontal plane (11b). Along with this, the top mat (2) is refracted in a square shape when viewed from the side along the inclined surface (11a) and the horizontal surface (11b). In addition, the carpet (12) is laid on the top surface of the top mat (2) to protect the surface of the flat bag body (20), and when the user uses it with bare feet, it feels good against the soles. It is supposed to be able to give

  Thus, having the horizontal surface (116) at the front half of the top mat (2) can make it easier to perform a high and stable jump forward by the athlete putting his foot on this part. It is suitable.

A ... Railroad crossing board 1, 11, ... Base board 1a ... Inclined surface 2 ... Top mat 21 ... Top airtight sheet 22 ... Bottom airtight sheet 23 ...・ Connection thread 24 ・ ・ ・ ・ Regulation space 25 ・ ・ ・ ・ ・ ・ Air supply / exhaust port

Claims (7)

A base board whose upper surface is formed substantially upwardly toward the front, and a top mat that is stacked on and integrally joined to the base board;
The base board is made of a semi-rigid synthetic resin foam,
The top mat is a flat bag body in which a restriction space having a predetermined height is formed between opposing surfaces of the two airtight sheets by passing a large number of continuous yarns between the two upper and lower flexible airtight sheets. A crossing board for gymnastics, characterized in that the flat bag body is filled with compressed air to give high resilience.   The gymnastic railroad crossing board according to claim 1, wherein the top mat is detachably coupled to the base board via a separable coupling means.   The gymnastic railroad crossing board according to claim 2, wherein the top mat is capable of changing a coupling position with respect to the base board in the front-rear direction.   The gymnastic railroad crossing board according to claim 2 or 3, wherein the coupling means includes a hook-and-loop fastener that forms a pair of male and female. The base plate is expansion ratio 5-20 times, gymnastics springboard according to claim 1, consisting of 25% compressive hardness 6~30N / cm ² of ethylene vinyl acetate resin foam.   The level crossing board for gymnastics according to any one of claims 1 to 5, wherein the top mat has an apparent thickness of 30 to 150 mm.   The gymnastics level crossing board according to any one of claims 1 to 6, wherein the top mat has a compressed air pressure set to 10 to 42 kPa.

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