JP2014124411A - Shuttlecock wall-hitting board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shuttlecock wall-hitting board which is suitable for hitting a shuttlecock against a wall.SOLUTION: A shuttlecock wall-hitting board 10 includes an elastic body layer 11 having an impact resilience of 30% or more and less than 100%, and a surface material layer 12 set on the elastic body layer 11 and having a surface exposed outward. The surface material layer 12 has hardness higher than that of the elastic body layer 11 and the surface of the surface material layer 12 has a static friction coefficient of larger than 0 and 0.43 or less.

Description

  The present invention relates to a wall board for a shuttlecock, and more particularly to a wall board for a shuttlecock for practicing racket work alone using the shuttlecock.

  Badminton is a sport in which two or four players face each other across the net and hit the shuttlecock with a racket. The shuttlecock includes a hemispherical cork covered with synthetic leather and a plurality of bird feathers extending radially from the cork.

  Traditionally, badminton players have used the shuttlecock to wall the shuttlecock when practicing racket work alone. Shuttle cock wall strike is a practice method that repeats the action of driving the shuttle cock with a racket against the hard wooden wall or cement wall of the gymnasium and driving the shuttle cock bounced back on the wall again with the racket. is there.

  Patent Documents 1 and 2 listed below disclose conventional ball game training devices. The following Patent Document 1 includes a frame formed in an appropriate shape and size, a net stretched in the frame, and a plurality of locking devices attached to the frame or the net. A ball training apparatus is disclosed. This ball game training device is attached to the badminton net by a locking tool so as to protrude upward from the upper side of the badminton net.

  Patent Document 2 below discloses a first layer of glass fiber reinforced plastic, a second layer of thermosetting polyurethane foam having air flow holes inscribed in the first layer, wood, metal, or glass fiber reinforced plastic. A ball game practice board comprising a third layer consisting of:

JP 2006-223733 A JP 09-225079 A

  Since the portion of the shuttlecock that collides with the object is made of cork, the impact applied to the object is small compared to the ball, and the repulsive force of the shuttlecock itself is also small. For this reason, when a hard wall made of wood or cement is used for hitting the shuttlecock (when the shuttlecock is used as an object to be driven), the driven shuttlecock does not sufficiently rebound. In order to hit the wall of the shuttlecock, the player needed the strength and skill to drive the shuttlecock strongly. As a result, players such as weak children and beginners could not use the wall as a practice environment.

  The part where the shuttlecock collides in the ball game training instrument of Patent Document 1 is a net with a weak repulsive force. When the shuttlecock wall was hit using the ball game training instrument of Patent Document 1, the driven shuttlecock did not rebound sufficiently, and the player could not repeatedly hit the shuttlecock.

  The practice board for ball game of Patent Document 2 needs to withstand the impact that the ball repeatedly hits, and therefore the surface on which the ball collides is made of glass fiber reinforced plastic. Since the hardness of glass fiber reinforced plastic is very high, when the shuttlecock wall is struck using the ball game practice board of Patent Document 2, the driven shuttlecock does not rebound sufficiently, and the player does not use the shuttlecock. I couldn't repeat it.

  The present invention is to solve the above-described problems, and an object of the present invention is to provide a board for boarding a shuttlecock suitable for walling the shuttlecock.

  A shuttlecock wall striking board according to one aspect of the present invention includes an elastic body layer having a rebound resilience of 30% or more and less than 100%, and a surface material provided on the elastic body layer and having a surface exposed to the outside. The surface material layer has a higher hardness than the elastic layer, and the surface of the surface material layer has a coefficient of static friction greater than 0 and 0.43 or less.

  In the shuttlecock wall board, the surface material layer preferably includes polyvinyl chloride or polypropylene.

  In the shuttlecock wall-boarding board, the surface material layer preferably has a thickness of 0.2 mm to 1.5 mm.

  Preferably, the shuttlecock wall driving board further includes an angle adjuster for adjusting the inclination angle of the surface of the surface material layer.

  Preferably, the shuttlecock wall driving board further includes a core member having a main surface, and the elastic layer is provided on the main surface of the core member.

  Preferably, in the shuttlecock wall-boarding board, the surface material layer includes a first region having a surface parallel to the main surface of the core material and a second region not parallel to the surface of the first region. And a second region having a surface.

  ADVANTAGE OF THE INVENTION According to this invention, the board for a wall surface of a shuttlecock suitable for the wall surface of a shuttlecock can be provided.

It is sectional drawing which shows typically the use condition of the board for wall-mounting of the shuttlecock in one embodiment of this invention. It is a front view which shows the structure of the board for a wall surface of the shuttlecock in one embodiment of this invention. It is sectional drawing along the YY line of FIG. It is a bottom view which shows the structure of the board for wall driving of the shuttlecock in one embodiment of this invention. FIG. 4 is an enlarged view of a part RG in FIG. 3. It is a figure explaining the adjustment method of the inclination-angle of the wall-driving board by an angle adjuster. It is a figure which shows the relationship between the structure of the material of the board for boarding a shuttlecock, and the rebound of a shuttlecock. It is a front view which shows the structure of the board for boarding the shuttlecock in the 1st modification of this invention. It is sectional drawing along the YY line of FIG. It is a bottom view which shows the structure of the board for wall driving of the shuttlecock in the 1st modification of this invention. It is a front view which shows the structure of the board for wall driving of the shuttlecock in the 2nd modification of this invention. It is sectional drawing along the YY line of FIG. It is a bottom view which shows the structure of the board for boarding the shuttlecock in the 2nd modification of this invention. It is a front view which shows the structure of the board for boarding the shuttlecock in the 3rd modification of this invention. It is sectional drawing which shows the state which suspended the wall-boarding board of the shuttlecock shown in FIG. 14 on the wall. It is a front view which shows the structure of the board for wall driving of the shuttlecock in the 4th modification of this invention. It is sectional drawing along the YY line of FIG. It is a table | surface which shows the relationship between the material which comprises the surface material layer of sample A1-O1, and the characteristic of sample A1-O1.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view schematically showing a use state of a wall board for a shuttlecock according to an embodiment of the present invention.

  Referring to FIG. 1, shuttlecock wall-driving board 10 in the present embodiment (hereinafter sometimes referred to as wall-driving board 10) is used in a state of being fixed to wall surface 30 of the gymnasium. The wall-mounting board 10 has an upper wall surface mounting portion 15 fixed to the wall surface 30 with screws 16. A space is created between the lower portion of the wall-driving board 10 and the wall surface 30 by the angle adjuster 20a. As a result, the wall driving board 10 is inclined with respect to the wall surface 30. The inclination angle φ of the wall driving board 10 can be adjusted by the angle adjuster 20a.

  Assume that the player has driven the shuttlecock into the wall-driving board 10 in the direction indicated by the arrow AR1 by, for example, an underhand stroke. The direction indicated by the arrow AR1 is a direction from the lower side to the upper side, and is a direction that forms an angle θ1 with respect to the horizontal direction. The shuttlecock driven into the wall-driving board 10 rebounds in the direction indicated by the arrow AR2. The direction indicated by the arrow AR2 is a direction from the lower side to the upper side, and is a direction that forms an angle θ2 with respect to the horizontal direction. The angle θ2 increases as the inclination angle φ of the wall driving board 10 increases.

  According to the wall striking board 10 in the present embodiment, a large repulsive force can be applied to the shuttlecock, and the shuttlecock can be repelled in the correct direction. Specifically, the shuttlecock driven into the wall-driving board 10 rebounds in the direction of the reflection angle α2 that is substantially equal to the incident angle α1 with respect to the normal X of the surface of the wall-driving board 10. As a result, the shuttlecock reaches the vicinity of the player's position along a mountain trail, so that the player can repeatedly drive the shuttlecock.

  In addition, the installation place of the wall-driving board 10 is arbitrary, and may be not only the wall surface of the gymnasium but also the wall surface in the house. Moreover, you may install in a partition or a mobile partition.

  Next, a specific configuration of the shuttlecock wall board in the present embodiment will be described.

  2-4 is a figure which shows the structure of the board for a wall surface of the shuttlecock in one embodiment of this invention. 2 is a front view, FIG. 3 is a cross-sectional view taken along line YY of FIG. 2, and FIG. 4 is a bottom view.

  2 to 4, the wall-driving board 10 includes a core material board 1 (an example of a core material), a mat 2, and an angle adjuster 20a. The core board 1 has a rectangular planar shape. The core board 1 is plate-shaped and has planar main surfaces 1a and 1b. The core board 1 includes a wall surface attaching portion 15 at an upper portion thereof, and six screw holes 4 for passing screws are opened in the wall surface attaching portion 15.

  A mat 2 is provided on the main surface 1a in a portion other than the wall surface attachment portion 15 of the core board 1. The mat 2 has a rectangular planar shape and is in the form of a sheet.

  The angle adjuster 20 a is attached to the main surface 1 b in the lower part of the core board 1. The angle adjuster 20a can adjust the length L by a method described later, and the inclination angle of the wall-driving board 10 can be adjusted by adjusting the length L. Note that the wall board 10 does not include the angle adjuster 20a, and the inclination angle of the wall board 10 may always be a constant value.

  The position and the number of the screw holes 4 are arbitrary. The method of attaching the wall-driving board 10 is arbitrary. In addition to the case where the screw 16 is used as in the present embodiment, it may be suspended from a hook provided on the wall surface with a string or the like, double-sided tape, etc. May be adhered to the wall surface. The wall surface attaching portion 15 may not be provided. The planar shape of the core material board 1 and the mat 2 is arbitrary, and the core material board 1 may be a circle as well as a rectangle as in the present embodiment.

  FIG. 5 is an enlarged view of a portion RG in FIG.

  Referring to FIG. 5, core board 1 is made of, for example, a wood-based board, a synthetic resin-based board, a fiber-reinforced plastic board, a composite board of metal and plastic, or a paper-type board. Examples of the wood-based board include a wood fiber board such as a plywood board, a laminated board, a particle board, a hard board, a lumbar core, or a medium density fiber board (MDF ply board). Examples of the synthetic resin plate include a plastic plate or a plastic hollow plate (plastic honeycomb board, plastic bubble board, plastic cardboard, etc.). Examples of the paper-based board include a hollow-formed board (paper honeycomb board, reinforced cardboard, etc.).

  The core board 1 may be made of a material other than the above. Further, the core board 1 may be made of the above-mentioned material alone, or a multilayer body in which the above materials are arbitrarily combined, such as a composite body in which a wooden board and a synthetic resin board are combined. It may be.

  The mat 2 includes an elastic body layer 11 and a surface material layer 12. The elastic body layer 11 is provided on the main surface 1 a of the core board 1, and the surface material layer 12 is provided on the elastic body layer 11.

  The elastic body layer 11 has high elasticity, and has a rebound resilience of 30% or more and less than 100%. The rebound resilience of the elastic body can be determined, for example, by a method defined as JIS K 6400. Since the elastic body layer 11 has a rebound resilience of 30% or more, a large repulsive force can be applied from the elastic body layer 11 to the driven shuttlecock. In order to obtain a repulsive force with a smaller force, the elastic layer 11 preferably has a restitution coefficient of 50% or more.

  The elastic layer 11 includes, for example, polyolefin foam (polyethylene foam), chloroprene (CR) rubber foam (chloroprene rubber sponge), ethylene propylene diene rubber foam (ethylene propylene rubber (EPDM) rubber sponge), ethylene It consists of a vinyl acetate copolymer resin (EVA) foam or a polyurethane foam.

  The elastic body layer 11 may include communication bubbles, or may include communication bubbles and closed cells. In the case where the elastic body layer 11 includes communication bubbles and closed cells, it is preferable that the ratio of closed cells is large. The thickness of the elastic body layer 11 is arbitrary.

  The surface material layer 12 has higher hardness than the elastic body layer 11. The surface material layer 12 includes a smooth layer 12a and a print layer 12b. The print layer 12b is provided between the elastic body layer 11 and the smooth layer 12a. The smooth layer 12a has a surface exposed to the outside.

  The surface (upper surface) of the smooth layer 12a is smooth and has a coefficient of static friction greater than 0 and not greater than 0.43, preferably not greater than 0.20. The static friction coefficient of the surface of the smooth layer 12a can be determined by a method defined as JIS K 7125, for example.

  In order to reduce the friction on the surface of the smooth layer 12a, the surface of the smooth layer 12a may be subjected to a surface treatment such as a satin finish, a grain finish, a matte finish, or an embossing. Further, the surface of the smooth layer 12a may be provided with a slip property by a method such as sanding the surface of the smooth layer 12a. Further, a silicone resin or a fluororesin may be added, attached, or coated on the surface of the smooth layer 12a. These processes may be combined with each other.

  The smooth layer 12a is made of a resin sheet layer of a thermoplastic resin such as polyvinyl chloride (PVC), polyethylene, polystyrene, polypropylene (PP), polycarbonate, or ABS resin (acrylonitrile, butadiene, styrene copolymer synthetic resin). Yes. The smooth layer 12a may be soft, semi-rigid, or hard. The smooth layer 12a may be a single layer or multiple layers.

  The smooth layer 12a is preferably made of PVC or PP from the viewpoint of material flexibility. When the smooth layer 12a is made of PVC or PP, the thickness of the surface material layer 12 is preferably 0.2 mm or more and 1.5 mm or less. Thereby, the surface material layer 12 is deformed by the force of the driven shuttlecock, whereby the elastic body layer 11 is recessed, so that a large repulsive force can be obtained from the elastic body layer 11.

  Since the soft resin has a smaller repulsive force than the hard resin having the same thickness, when the soft resin is employed as the smooth layer 12a, the driven shuttlecock rebounds slowly. For this reason, it is preferable that a soft resin is used for the smooth layer 12a of the wall board 10 used by a general level player. On the other hand, since the hard resin has a larger repulsive force than the soft resin having the same thickness, when the hard resin is employed as the smooth layer 12a, the driven shuttlecock rebounds quickly. For this reason, it is preferable that hard resin is used for the smooth layer 12a of the wall-launching board 10 used by a high-level player.

  The printed layer 12b is a layer on which a shuttlecock target or the like is printed. By providing the printed layer 12b, the player's practice effect can be enhanced. The print layer 12b is made of PP pef paper, for example. In addition, the printing layer 12b is not provided, and the elastic body layer 11 and the smooth layer 12a may contact. The printing layer 12b may not be provided, and printing may be performed directly on the surface of the smooth layer 12a or the boundary surface with the elastic layer 11 in the smooth layer 12a. When the print layer 12b is provided, the smooth layer 12a is preferably made of a translucent or transparent material so that characters and figures printed on the print layer 12b can be seen from the outside.

  FIG. 6 is a diagram for explaining a method of adjusting the inclination angle of the wall driving board by the angle adjuster.

  Referring to FIG. 6A, the angle adjuster 20a includes five blocks 21a to 21e and a hook-and-loop fastener 22. The block 21 a is fixed to the main surface 1 b of the core board 1. The block 21b is connected to the block 21a, the block 21c is connected to the block 21b, the block 21d is connected to the block 21c, and the block 21e is connected to the block 21d. The hook-and-loop fastener 22 is mounted on the upper surface of each of the blocks 21a to 21e, and the blocks 21a to 21e are connected to each other by the hook-and-loop fastener 22. Each of the blocks 21a and 21c to 21e has a square cross-sectional shape having a side with a length D. The block 21b has a rectangular cross-sectional shape having a side with a length D and a side with a length 2D.

  As shown to Fig.6 (a), in the state which the angle adjuster 20a has extended completely, the blocks 21a-21e are located in a line with the horizontal direction in the figure. When the angle adjuster 20a is in this state, the length of the angle adjuster 20a is 6D, and the inclination angle of the wall driving board 10 (the surface of the surface material layer 12) is maximized.

  As shown in FIG. 6B, when the block 21e at the extreme end of the angle adjuster 20a is folded upward as indicated by the dotted arrow, the blocks 21a to 21d are arranged in the horizontal direction in the figure. . When the angle adjuster 20a is in this state, the length of the angle adjuster 20a is 5D, and the inclination angle of the wall-driving board 10 (the surface of the surface material layer 12) is larger than that in the case of FIG. Becomes smaller.

  As shown in FIG. 6 (c), when the two blocks 21d and 21e on the tip side of the angle adjuster 20a are folded upward as shown by the dotted arrows, the blocks 21a to 21c are laterally moved in the figure. Are lined up. When the angle adjuster 20a is in this state, the length of the angle adjuster 20a is 4D, and the inclination angle of the wall-driving board 10 (the surface of the surface material layer 12) is larger than that in the case of FIG. Becomes smaller.

  As shown in FIG. 6D, in the state where the three blocks 21c to 21e on the distal end side of the angle adjuster 20a are folded upward as indicated by dotted arrows, the blocks 21a and 21b are laterally moved in the figure. Are lined up. When the angle adjuster 20a is in this state, the length of the angle adjuster 20a is 3D, and the inclination angle of the wall-driving board 10 (the surface of the surface material layer 12) is larger than that in the case of FIG. Becomes smaller.

  As shown in FIG. 6 (e), in the state where the four blocks 21b to 21e on the front end side of the angle adjuster 20a are folded upward as indicated by dotted arrows, the blocks 21a are arranged in the horizontal direction in the figure. Yes. When the angle adjuster 20a is in this state, the length of the angle adjuster 20a is 2D, and the inclination angle of the wall-driving board 10 (the surface of the surface material layer 12) is larger than that in the case of FIG. Becomes smaller.

  As shown in FIG. 6 (f), in a state where the hook-and-loop fastener 22 and the blocks 21b to 21e are removed from the block 21a, only the blocks 21a are arranged in the horizontal direction in the drawing. When the angle adjuster 20a is in this state, the length of the angle adjuster 20a is the length D, and the inclination angle of the wall-driving board 10 (the surface of the surface material layer 12) is larger than that in the case of FIG. Becomes smaller.

  In this way, by making it possible to adjust the inclination angle of the wall striking board 10 (the surface of the surface material layer 12), the trajectory of the shuttlecock that bounces can be adjusted according to the level of the player. Players with different levels (skill levels) on the hitting board 10 can hit the wall of the shuttlecock.

  Next, the effect which the wall-boarding board in this Embodiment has is demonstrated.

  FIG. 7 is a diagram showing the relationship between the material configuration of the shuttlecock wall striking board and the shuttlecock bounce. FIG. 7 shows a case where the normal of the surface of the shuttlecock wall driving board extends in the horizontal direction. (A) is a figure when the surface of the wall-boarding board is comprised by the elastic body layer 11 (when the surface material layer is not provided), (b) and (c) are for wall-mounting It is a figure in case a board is the board | substrate 10 for wall placement in this Embodiment. The direction indicated by the arrow AR1 is the incident direction of the shuttlecock.

  Referring to FIG. 7 (a), when the surface of the wall-boarding board is composed of an elastic body layer 11 (when no surface material layer is provided), the elastic body layer 11 has a low hardness. Because it is, it is greatly dented by the force of the shuttlecock that has been driven. The front end portion of the shuttlecock is taken into the elastic body layer 11, and the rotation and direction change of the shuttlecock are prevented by the elastic body layer 11. Thereby, the repulsive force of the shuttlecock is reduced, and the repulsive direction is lower than the incident direction as indicated by an arrow AR3. As a result, the shuttlecock does not easily bounce back to the player's position.

  Referring to FIG. 7B, when the wall driving board is the wall driving board 10 in the present embodiment, the surface material layer 12 has a high hardness, so that the elastic body layer 11 is driven in. The tip of the shuttlecock is not taken into the elastic layer 11 although it is recessed by the force of the shuttlecock. Moreover, since the surface of the surface material layer 12 is smooth, the rotation of the shuttlecock is maintained, and the direction change of the shuttlecock is not hindered by the surface material layer 12. As a result, the shuttlecock obtains a repulsive force from the elastic layer 11, and the repulsive direction is in the correct direction as shown by the arrow AR4 (approximately the incident angle α1 of the shuttlecock with respect to the normal X of the surface of the wall-boarding board). The direction in which the reflection angles α2 are equal).

  Referring to FIG. 7 (c), the wall driving board is the wall driving board 10 in the present embodiment, and the surface material layer 12 is relatively thin (for example, a thickness of 1.5 mm or less). The elastic layer 11 is easily dented by the force of the driven shuttlecock. Thereby, the shuttlecock obtains a larger repulsive force from the elastic layer 11 and easily reaches the vicinity of the position of the player.

  Therefore, the friction between the surface material layer 12 and the shuttlecock is reduced by setting the coefficient of static friction of the surface material layer 12 (smooth layer 12a) to 0.43 or less. When rebounding at 10, the rotation of the shuttlecock is maintained (the ball slips better), the direction change of the shuttlecock is promoted, and the rebound direction of the shuttlecock can be stabilized (the ball separation is improved).

  It is preferable that the thickness of the surface material layer 12 is so thin that the elastic body layer 11 sufficiently exerts a repulsive force by the force of the shuttlecock that has been driven. Specifically, when the smooth layer 12a is made of PVC or PP, the thickness of the surface material layer 12 is preferably 1.5 mm or less, more preferably 1.0 mm or less, and 0.8 mm. Most preferably.

  On the other hand, the thickness of the surface material layer 12 is preferably so thick that the tip of the driven shuttlecock is not taken into the elastic body layer 11. Specifically, when the smooth layer 12a is made of PVC or PP, the thickness of the surface material layer 12 is preferably 0.2 mm or more, and more preferably 0.3 mm or more.

[First Modification]
FIGS. 8-10 is a figure which shows the structure of the board for wall driving of the shuttlecock in the 1st modification of this invention. 8 is a front view, FIG. 9 is a cross-sectional view taken along line YY of FIG. 8, and FIG. 10 is a bottom view.

  Referring to FIGS. 8 to 10, the wall striking board 10 according to the present modification is provided with an angle adjuster 20 b as an angle adjuster for adjusting the inclination angle of the wall striking board. This is different from the wall driving board shown in FIG.

  The angle adjuster 20 b is attached to the main surface 1 b on both sides of the lower part of the core board 1. The angle adjuster 20b includes a plurality of cylindrical members 23 made of rubber or the like. Each of the cylindrical members 23 can be attached to and detached from each other by a hook-and-loop fastener or the like. The angle adjuster 20b can adjust its length L by changing the number of cylindrical members 23 constituting the angle adjuster 20b, and by adjusting the length L, the wall driving board 10 (surface material layer) can be adjusted. The inclination angle of the 12 surfaces can be adjusted.

  In addition, since the structure of the wall-boarding board 10 other than the above is the same as that of the wall-boarding board shown in FIG. 2 to FIG.

[Second Modification]
FIGS. 11-13 is a figure which shows the structure of the board for wall driving of the shuttlecock in the 2nd modification of this invention. 11 is a front view, FIG. 12 is a cross-sectional view taken along line YY of FIG. 11, and FIG. 13 is a bottom view.

  Referring to FIGS. 11 to 13, in the wall-driving board 10 in the present modification, the core board 1 does not include the wall surface attaching portion 15, and the warpage provided around the core board 1 and the mat 2. The board is different from the wall driving board shown in FIGS.

  The warp stop frame 14 may be provided along the entire circumference (four sides) of the rectangular core board 1 as shown in the figure, or along any two or three sides of the rectangular core board 1. It may be provided.

  A reinforcing rib for warpage prevention may be provided on the back surface of the core board 1 together with the warpage prevention frame 14 or instead of the warpage prevention frame 14.

  Since the wall-boarding board 10 has a small thickness as compared with the size of the surface area, warping is likely to occur. For this reason, by providing the warp stop frame 14, it is possible to prevent the wall striking board 10 from warping.

  When the wall-mounting board 10 is suspended from a hook provided on the wall surface by a string, a suspension hole 3 for passing the string is provided in the upper part of the warp prevention frame 14 or the like. May be.

  In addition, since the structure of the wall-boarding board 10 other than the above is the same as that of the wall-boarding board shown in FIG. 2 to FIG.

[Third Modification]
FIG. 14 is a front view showing a configuration of a wall-driving board for a shuttlecock according to a third modification of the present invention. FIG. 15 is a cross-sectional view showing a state where the wall-mounting board of the shuttlecock shown in FIG. 14 is suspended from the wall.

  Referring to FIG. 14 and FIG. 15, the wall striking board 10 in this modification is not hung with a string, but the wall striking board 10 is against the hook 7 provided on the wall surface 30. It differs from the wall-boarding board shown in FIGS. 11 to 13 in that it is suspended by the hook hanging portion 6.

  In addition, since the structure of the wall-boarding board 10 other than the above is the same as that of the wall-boarding board shown in FIG. 2 to FIG.

[Fourth Modification]
FIGS. 16 and 17 are diagrams showing the configuration of a wall-driving board for a shuttlecock according to a fourth modification of the present invention. 16 is a front view, and FIG. 17 is a cross-sectional view taken along line YY of FIG.

  Referring to FIGS. 16 and 17, the wall striking board 10 in the present modification example is the wall striking shown in FIGS. 2 to 4 in that the surface of the mat 2 (surface material layer 12) is uneven. It is different from the board.

  The mat 2 includes a region 2a having a surface parallel to the main surface 1a of the core board 1 and a region 2b having a surface not parallel to the surface of the region 2a. The region 2a is a region having a circular planar shape at the center of the mat 2, for example. Region 2b is a region around region 2a, for example. The mat 2 in the region 2b may have a gently uneven surface (a surface having a flatness lower than the flatness of the surface of the region 2a), or may have a curved surface. .

  In addition, since the structure of the wall-boarding board 10 other than the above is the same as that of the wall-boarding board shown in FIG. 2 to FIG.

  According to this modification, the shuttlecock can be rebounded in different directions depending on whether the shuttlecock driven from one direction hits the region 2a or the region 2b. As a result, it becomes difficult for the player to drive the bounced shuttlecock into the wall-driving board 10 again, and the wall-driving board is suitable for a higher-level player.

[Example]
The inventor of the present application conducted the following test in order to examine the relationship between the material constituting the surface layer of the wall-driving board and the characteristics of the wall-driving board.

  Samples A1 to O1 which are wall-boarding boards having different materials constituting the surface material layer were manufactured. Samples A1 to M1 are examples of the present invention, and samples N1 and O1 are comparative examples. About the core material board of sample A1-O1, all samples were produced using MDF plywood, and about the elastic body layer, all samples were produced using EVA foam having a rebound resilience of 30% or more. . No printing layer was provided on the surface material layer.

  About each surface material layer of sample A1-E1, it produced using PVC which has thickness of 0.1 mm, 0.2 mm, 0.3 mm, 1.5 mm, and 2.0 mm, respectively. About each surface material layer of sample F1-J1, it produced using PP which has thickness of 0.1 mm, 0.2 mm, 0.3 mm, 1.5 mm, and 2.0 mm, respectively. About the surface material layer of the sample K1, it was produced using PVC having a thickness of 0.3 mm and having the surface treated with a satin finish. The surface material layer of sample L1 was made of PVC having a thickness of 0.3 mm, with the surface treated with a satin finish and coated with a silicone resin. The surface material layer of the sample M1 was manufactured using PP having a thickness of 0.3 mm and having a surface treated on the surface. About the surface material layer of sample N1, it produced using the urethane rubber which has a thickness of 0.5 mm. For sample O1, a surface material layer was not provided and an elastic layer was exposed on the surface.

  Next, the static friction coefficient of the surface material layer of each of samples A1 to N1 was measured. The static friction coefficient was measured by the Osaka City Industrial Research Institute. The static friction coefficient was measured by measuring the static friction coefficient three times by a method defined as JIS K 7125 and calculating the average value of the three measurement results. As the slip piece, synthetic leather for a plurality of shuttlecocks for games and practice was used. As a result, the static friction coefficients of samples A1 to E1 were 0.43, and the static friction coefficients of samples F1 to J1 were 0.31. The static friction coefficient of sample K1 was 0.20, and the static friction coefficient of sample L1 was 0.10. The static friction coefficient of sample M1 was 0.20, and the static friction coefficient of sample N1 was 0.87.

  Subsequently, the characteristics of each of the samples A1 to N1 were evaluated. Specifically, the wall-launching board was placed on the wall surface at a height of 1.3 m from the ground. Then, the shuttlecock is driven into the wall-launching board from a position of height of 0.8 m away from the wall surface, the shuttlecock rebound direction and flight distance bounced back are measured, and samples A1 to N1 are measured from the rebound direction and flight distance. Each characteristic of was evaluated.

  FIG. 18 is a table showing the relationship between the materials constituting the surface material layers of samples A1 to O1 and the characteristics of samples A1 to O1.

  Referring to FIG. 18, when sample N1 or O1 was used as the wall-launching board, the rebound direction was unstable downward from the horizon, and the flight distance was small. When the sample A1 or F1 was used as the wall-launching board, the rebound direction was almost stable upward than the horizontal direction, and a large flight distance was obtained. When the sample E1 or J1 was used as the wall-launching board, a stable repulsion direction was obtained upward from the horizontal direction, and a sufficient flight distance was obtained. When the samples B1 to D1 or G1 to I1 were used as the wall-launching board, the rebound direction was stable upward than the horizontal direction, and a large flight distance was obtained. When the samples K1 to M1 were used as the wall-launching board, the rebound direction was very stable upward from the horizontal direction, and a large flight distance was obtained.

  From the above results, it was found that sufficient characteristics can be obtained by setting the surface of the surface material layer to a static friction coefficient of 0.43 or less. Moreover, it turned out that a favorable characteristic is acquired by making a surface material layer into thickness of 0.2 mm or more and 1.5 mm or less. Furthermore, it can be seen that very good characteristics can be obtained by reducing the static friction coefficient of the surface layer.

  In addition, the inventors of the present invention evaluated the characteristics by the same method as described above, using a sample in which a plastic plate or hard corrugated cardboard was used as the core board instead of the MDF plywood as the wall-boarding board. As a result, the characteristics of these samples were almost the same as the characteristics of Samples A1 to O1. From this result, it was found that the change in characteristics depending on the material of the core board was small.

  Further, the inventors of the present invention evaluated the characteristics by the same method as described above using a sample employing a polyolefin foam having a rebound resilience of 30% or more as an elastic body layer instead of EVA as a board for wall striking. went. As a result, the characteristics of these samples were almost the same as the characteristics of Samples A1 to O1. From this result, it was found that if the material constituting the elastic layer has a rebound resilience of 30% or more, the change in characteristics due to the material constituting the elastic layer is small.

[Effect of the embodiment]
According to the shuttlecock wall striking board of the above-described embodiment, a large repulsive force can be applied to the shuttlecock and the shuttlecock can be repelled in the correct direction. As a result, the player can repeatedly drive the shuttlecock, resulting in a wall driving board suitable for walling the shuttlecock. Also, players of any level can easily hit the wall of the shuttlecock with a small force.

  Further, by making it possible to adjust the inclination angle of the wall striking board (the angle at which the shuttlecock bounces back) with the angle adjuster, it is possible to adjust the flight distance and locus of the shuttlecock bounced off by the wall striking board. Thereby, the flight distance and locus of the shuttlecock applied to the level of the player and the location of the wall-mounted board can be realized.

  Furthermore, since the impact sound generated when the shuttlecock collides is absorbed by the elastic layer, noise can be reduced compared to the case where the shuttlecock is driven directly into a hard wooden or cement wall of the gymnasium. . As a result, a preferred practice environment for badminton can be provided.

[Others]
The wall-launching board does not have to include a core board. In this case, by directly attaching the mat (elastic body layer) to the wall surface or the like, the wall board can be used for wall driving of the shuttlecock.

  The configuration of the angle adjuster that adjusts the inclination angle of the wall driving board is arbitrary, and may be a jack type. The place where the angle adjuster is provided in the wall board is arbitrary.

  The above-described embodiments can be combined with each other. For example, the warping stop frame of the second modification may be provided for the wall-mounted board provided with the angle adjuster of the first modification, or the hook hanging portion of the third modification may be provided. Alternatively, the surface of the surface material layer may be provided with irregularities as in the fourth modification. The hooking portion of the third modification may be provided on the wall-boarding board provided with the warp prevention frame of the second modification, or on the surface of the surface material layer as in the fourth modification. Concavities and convexities may be provided. Concavities and convexities may be provided on the surface of the surface material layer as in the fourth modified example with respect to the wall-mounted board provided with the hook hanging portion of the third modified example.

  The above-described embodiment is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Core material board 1a, 1b Main surface of core material board 2 Mat 2a Mat area 2b Mat area 3 Hanging hole 4 Screw hole 6 Hook hook part 7 Hook 10 Wall-driving board 11 Elastic body layer 12 Surface material layer 12a Smooth layer 12b Print layer 14 Warp stop frame 15 Wall mounting portion 16 Screws 20a, 20b Angle adjusters 21a to 21e Block 22 Surface fastener 23 Cylindrical member 30 Wall surface

Claims (6)

An elastic body layer having a rebound resilience of 30% or more and less than 100%;
A surface material layer provided on the elastic body layer and having a surface exposed to the outside;
The surface material layer has a higher hardness than the elastic layer,
The shuttlecock wallboarding board, wherein the surface material layer has a surface having a coefficient of static friction of greater than 0 and less than or equal to 0.43.   The board for boarding a shuttlecock according to claim 1, wherein the surface material layer includes polyvinyl chloride or polypropylene.   The board for boarding a shuttlecock according to claim 2, wherein the surface material layer has a thickness of 0.2 mm or more and 1.5 mm or less.   The board for boarding a shuttlecock according to any one of claims 1 to 3, further comprising an angle adjuster for adjusting an inclination angle of a surface of the surface material layer. A core material having a main surface;
The board for boarding a shuttlecock according to any one of claims 1 to 4, wherein the elastic layer is provided on a main surface of the core member.   The surface material layer includes a first region having a surface parallel to the main surface of the core material and a second region having a second surface not parallel to the surface of the first region. The board for boarding a shuttlecock according to claim 5, comprising:

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