JP5517334B2 - snow board - Google Patents

Description

  The present invention relates to a snowboard (sliding tool on snow), and more specifically, torsional characteristics that lead to improved operability without impairing the resilience (longitudinal bending rigidity) required for a snowboard with good performance. The present invention relates to a snowboard that can be improved easily.

Conventionally, in order to change the resilience and torsional characteristics of a snowboard, the type of wooden laminates that make up the core of the snowboard has been changed, or the number and type of laminates (reinforcing materials) to be used have been changed. It was.
This is because the strength (bending rigidity and torsional rigidity) varies depending on the type of laminated material. For example, if laminated materials such as high-density maple and birch are used frequently, the rigidity of the snowboard increases, and poplar, white ash, etc. If a lot of laminated materials are used, the rigidity of the snowboard can be suppressed.

  However, depending on the change of the laminated material, it is difficult to separately change the resilience and torsional characteristics of the snowboard. If the torsional characteristics that lead to improved operability are improved, the resilience is impaired at the same time, which is unsatisfactory. It becomes a snowboard of performance. That is, there is a problem that a snowboard with good operability cannot be provided depending on the change of the laminated material.

  Therefore, a structure in which a non-reinforcing elastic member is embedded along the longitudinal direction in the center in the width direction of the upper surface layer of the ski body has been proposed as a structure for improving the torsional characteristics during the sliding of the snow skiing tool. (See Patent Document 1).

  In this prior art, by embedding a non-reinforcing elastic member in a concave groove formed on the upper surface of the ski body, the load (edging force) applied to the ski body during the ski rotation operation is applied to the ski surface. Since the bend in the width direction is generated and the running surface has a convex shape, the biting area of the edge portion including the ski running surface into the snow surface can be reduced, and the drag resistance against the snow surface can be reduced.

  However, in such prior art, since the concave groove is formed only on the upper surface of the ski, there is a problem that sufficient torsional performance cannot be imparted to the ski, and it is embedded along the longitudinal direction of the ski. There has been a problem that the non-reinforcing elastic member is easily peeled off and a problem that it takes time to manufacture.

  As another conventional technique, a structure has been proposed in which a reinforcing material is arranged on the upper part of a board for sliding and a concave groove along the longitudinal direction of the board is formed in the center of the board so that the board can be easily twisted. (See Patent Document 2).

  However, even in the plate material described in Patent Document 2, since the concave groove is formed only on the upper surface of the sliding plate material, there is a problem that sufficient twisting performance cannot be imparted to the sliding plate material, In order to fill the concave groove formed up to the part, it is necessary to fit a fitting having a shape along the concave groove, which has a problem that it takes time for manufacturing.

Japanese Utility Model Publication No. 2-79988 Utility Model Registration No. 3103025

  Therefore, the problem to be solved by the present invention is that, in a snowboard having a conventional structure, sufficient torsional characteristics cannot be effectively imparted to the snowboard without impairing the resilience required for a snowboard with good performance. The object of the present invention is to provide a snowboard that can efficiently and easily improve the torsional characteristics that lead to improved operability without impairing the resilience required for a snowboard with good performance. is there.

  Another object of the present invention is to provide a snowboard that can partially improve the torsional characteristics of the snowboard without impairing the resilience required for a snowboard with good performance.

  Furthermore, the object of the present invention is to efficiently provide the torsional characteristics while maintaining the resilience of the snowboard without compromising the durability and required strength of the snowboard and without complicating the manufacturing process. It is an object of the present invention to provide a snowboard that can be easily improved.

  The present invention has been made to improve the torsional characteristics of a snowboard while minimizing the decrease in longitudinal bending rigidity that affects the resilience of the snowboard, and is capable of sliding from the upper surface of the snowboard along the longitudinal direction of the snowboard. The most important feature is a snowboard with a torsion control part consisting of a through groove reaching the surface.

  The present invention is provided with a torsion control portion comprising a concave groove formed on the upper surface of the snowboard along the longitudinal direction of the snowboard and a concave groove formed on the sliding surface corresponding to the portion immediately below the concave groove, and is similar to the through groove. You may make it obtain the effect of.

  In the snowboard of the present invention, the groove width on the upper surface side of the torsion control portion is configured to be wider than the groove width on the sliding surface side, or the binding is fixed at the center portion of the snowboard. It may be formed avoiding the position.

  Furthermore, the snowboard of the present invention partially uses a synthetic resin core material as an insert of the snowboard, and is provided with the torsion control unit along the longitudinal direction of the snowboard at a position corresponding to the synthetic resin core material. Also good.

  The snowboard of the present invention has a "through groove extending from the upper surface of the snowboard to the sliding surface along the longitudinal direction" or "a recessed groove formed on the upper surface of the snowboard along the longitudinal direction, and a sliding surface corresponding to a position immediately below the recessed groove. The torsion control portion comprising the “concave groove formed in the above” can improve the torsional characteristics of the snowboard while suppressing a decrease in the bending strength in the longitudinal direction of the snowboard as much as possible. Therefore, the present invention can easily provide a snowboard that can easily improve torsional characteristics without impairing the resilience required for a snowboard with good performance.

  In the snowboard according to the present invention, by forming the groove width on the upper surface side of the torsion control section so as to be wider than the groove width on the sliding surface side, occurrence of catching on the sliding surface can be suppressed as much as possible. In addition, by forming the torsion control portion in the center portion of the snowboard while avoiding the position where the binding is fixed, the torsional characteristics can be improved efficiently without impairing the strength of the snowboard at the binding fixing position.

  Furthermore, the snowboard of the present invention uses a synthetic resin core material partially as an insert, and obtains waterproofness by forming a torsion control portion along the longitudinal direction of the snowboard on the synthetic resin core material. It is possible to prevent the core material having the grooves from tearing, and the durability and strength of the snowboard can be maintained.

FIG. 1 is a plan view of a snowboard according to the present invention. FIG. 2 is a partial end view showing the snowboard of the present invention shown in FIG. 1 cut in a direction perpendicular to the longitudinal direction. FIG. 3 is a plan view showing an internal core used for manufacturing the snowboard of the present invention. FIG. 4 is a plan view showing the snowboard before the through groove is formed for manufacturing the snowboard of the present invention. FIG. 5 is a partial end view showing a snowboard of an embodiment in which concave grooves are formed on the upper surface and the sliding surface of the snowboard of the present invention, cut in a direction perpendicular to the longitudinal direction (Example 2). FIG. 6 is a plan view showing an internal core used for manufacturing the snowboard of the present invention (Example 3). FIG. 7 is a plan view of an embodiment in which a concave groove for forming a convex surface on the sliding surface of the snowboard of the present invention is formed (Example 3). FIG. 8 is a partial end view showing the snowboard of the present invention shown in FIG. 7 cut in a direction perpendicular to the longitudinal direction (Example 3). FIG. 9 is a plan view showing a snowboard of an embodiment in which a concave groove for forming a convex surface on the sliding surface of the snowboard of the present invention is formed (modified example of embodiment 3).

  The present invention provides a "torsion control unit comprising a through groove extending from the upper surface of the snowboard to the sliding surface along the longitudinal direction of the snowboard", or "a concave groove formed on the upper surface of the snowboard along the longitudinal direction of the snowboard; By forming a `` torsion control part consisting of a groove formed on the sliding surface corresponding to the position directly below the groove, it is possible to improve the torsional characteristics of the snowboard while suppressing a decrease in the bending strength in the longitudinal direction of the snowboard as much as possible. Realized snowboarding.

  By constructing the groove width on the upper surface side of the torsion control portion to be wider than the groove width on the sliding surface side, a snowboard that can suppress the occurrence of catching on the sliding surface was realized.

  In addition, by forming the torsion control part at the center part of the snowboard avoiding the position where the binding is fixed, the snowboard can efficiently improve the torsional characteristics without impairing the strength of the snowboard at the binding fixing position. Realized.

In addition, a synthetic resin core material is partially used as an insert, and the torsion control part is formed at a position corresponding to the synthetic resin core material, thereby realizing a snowboard with excellent waterproofness, durability and strength. did.
That is, when a groove is formed in a wooden core material used in a conventional snowboard, the wooden core material is impregnated with water, 1) the weight increases by the amount of water, and 2) the dimensions are increased by water. The internal stress changes as a result of the change. 3) The physical properties and strength are unbalanced between the part that is impregnated with water and the part that is not impregnated, and the part is destroyed. 4) The water is easily corroded, leading to partial damage. In addition, the wood is susceptible to damage because it is vulnerable to impacts. However, when a groove is provided in the synthetic resin core material that is bonded and integrated with the wooden core material, these problems do not occur.

  The torsion control part formed along the longitudinal direction of the snowboard may be linear or wavy, and is effective when formed near the center of the snowboard.

  FIG. 1 is a plan view showing an upper surface of an embodiment of the snowboard 10 according to the present invention, and FIG. 2 is a cross-sectional view of the snowboard 10 cut in a direction perpendicular to the longitudinal direction at a substantially central portion in the longitudinal direction. It is a partial end elevation.

Reference numeral 1 denotes a thin plate-like sliding surface material made of a synthetic resin (polyethylene) constituting the sliding surface of the snowboard 10, and 2 denotes a metal edge material arranged on the periphery of the sliding surface material 1.
Reference numeral 3 denotes a plurality of rectangular bar-shaped wooden cores that are used as inserts of the snowboard 10 and extend in the longitudinal direction of the snowboard 10, and 4 is a rectangular bar-shaped synthetic resin that is used as inserts in the center of the snowboard 10 and extends in the longitudinal direction of the snowboard 10. It is a core material.

  In the present embodiment, as the synthetic resin core material 4, a square material made of ABS resin having a width of 20 mm and a thickness of 9 mm was processed to a thickness (5 to 7 mm) similar to that of the wooden core material 3. The synthetic resin core material 4 is arranged so as to be sandwiched between the wooden core materials 3.

Reference numeral 5 denotes an ABS resin frame material (mall) disposed adjacent to the wooden core 3 at the periphery of the snowboard 10.
Reference numeral 6 denotes an FRP layer, which is provided in contact with the upper surface and the lower surface of the frame material 5, the wooden core material 3, and the synthetic resin core material 4.
7 is a polyamide surface sheet provided so as to cover the upper surface of the FRP layer on the upper surface side, and is a member constituting the upper surface of the snowboard 10.

  Reference numeral 8 denotes a through groove as a torsion control portion formed at a position corresponding to the synthetic resin core material 4 in the central portion of the snowboard 10, and is a sliding surface from the upper surface of the snowboard 10 along the longitudinal direction of the snowboard 10. It is provided penetrating up to.

  In the present embodiment, the length from the upper surface of the snowboard 10 to the sliding surface (thickness of the snowboard 10) is 10 mm at the center of the snowboard 10 and about 5 mm near the front and rear ends. 8, the length L in the longitudinal direction is 400 mm, the groove width on the upper surface side of the snowboard 10 is 12 mm, and the groove width on the sliding surface side is 5 mm.

  That is, the groove width on the upper surface side of the through groove 8 constituting the torsion control portion is configured to be wider than the groove width on the sliding surface side. Such a configuration is achieved by forming the angle θ1 in the vicinity of the opening of the through-groove 8 to about 60 degrees and the angle θ2 at the back of the sliding surface to about 10 degrees, thereby achieving an improvement in appearance. It is designed to effectively prevent finger pinching and occurrence of catching on the sliding surface.

  Further, the through groove 8 is formed between positions where a plurality of screw holes 9 for attaching the base plate of the binding to the snowboard 10 are disposed (positions where the loads from the feet are applied correspondingly to the left and right boots). Thus, the operability of the snowboard 10 can be efficiently improved by improving the torsional characteristics, and a decrease in strength at the binding attachment position can be prevented.

In addition, since the said through-groove 8 is formed in the part of the synthetic resin core material 4, the wooden core material 3 is not exposed, and a waterproof effect and excellent durability can be obtained.
Moreover, the effect on the design of the upper surface of the snowboard 10 can be obtained by the color of the synthetic resin core material 4 exposed in the through groove 8, and variations in design can be increased.

Next, a method for producing the snowboard of the present invention by press molding will be described.
In order to manufacture the snowboard 10 according to the present invention, a core 11 is prepared in which a wooden core material 3 is arranged in advance and integrated with an adhesive, and a synthetic resin core material 4 is arranged at the center of the processed snowboard according to the outer shape of the snowboard. (See FIG. 3).
A plurality of nuts provided with screw holes 9 are attached to the core 11 at predetermined positions.

  In this embodiment, the metal edge material 2, the glass fiber sheet, the core 11, the frame material 5, the glass fiber sheet, and the surface sheet are applied on the sliding surface material 1 while applying an epoxy adhesive. 7 is pressed using a mold while heating, the adhesive is cured over a period of several tens of minutes to one and a half hours, and then cooled to room temperature.

  The glass fiber sheet forms the FRP layer 6 by curing the adhesive. In the manufacturing process, the synthetic resin core material 4 is sandwiched between the wooden core materials 3. It is not different from the process for manufacturing a conventional general snowboard except that it is used.

  Thereafter, the sliding surface of the snowboard 10 is polished and finished, and then from the upper surface of the snowboard 10 so as to penetrate the topsheet 7, the FRP layer 6, the synthetic resin core material 4 and the sliding surface material 1 using a cutting machine. A linear through groove 8 is formed along the longitudinal direction.

  When the snowboard manufactured by the method as described above was tested for the bending rigidity and torsional rigidity of the snowboard before and after forming the through groove 8, the following results can be obtained. It was confirmed that the torsional characteristics that greatly affect the operability can be improved efficiently.

  In addition, although the amount of change due to the following experimental results seems to be slight, the feeling in actual running is remarkably improved, improving the torsional characteristics without impairing the resilience required for a good performance snowboard. It was confirmed that the operability of the snowboard was improved.

Change in bending rigidity of snowboard Measurement method: Supports the grounding point of snowboard 10 (position about 20 cm from the front and rear ends of the snowboard and about 30 cm away from the center of the position where the screw hole 9 is formed). The amount of deflection at the center when a 20 kg weight was placed on the center was measured.
Bending rigidity before formation of through groove 8 ・ ・ 28.0mm / 20kg
Flexural rigidity after formation of the through groove 8 ・ 28.5mm / 20kg
From the above, the bending rigidity was reduced by about 2% by forming the through groove 8.

Change in torsional rigidity of snowboard Measuring method: The boot center was fixed, and the rotation angle when a rotational torque of 10 Nm was applied was measured. That is, the torsional torque per unit angle was measured.
Torsional rigidity before formation of the through groove 8... 0.47 Nm / degree Torsional rigidity after formation of the through groove 8... 0.45 Nm / degree From the above, the torsional rigidity is reduced by about 5% by forming the through groove 8. did.

  FIG. 5 is a partial end view showing a part of a snowboard 20 according to another embodiment of the present invention, in which a member having the same configuration as that of the snowboard 10 according to the embodiment is denoted by the same reference numeral. The description is omitted.

  In the snowboard 20 of the present embodiment, in place of the through groove 8 formed in the synthetic resin core material 4 in the above embodiment, a concave groove 8a formed on the upper surface of the snowboard 20 along the longitudinal direction of the snowboard 20, A torsion control unit is provided which includes a concave groove 8b formed on a sliding surface corresponding to a position directly below the concave groove 8a.

Even in such a torsion control section, the torsional characteristics can be improved without impairing the resilience required for a snowboard with good performance, but the bottom of the groove 8a and the groove 8b is damaged by the twist of the snowboard 20. In order to prevent this, it is preferable to use the material 4a having high elasticity for the bottom.
As a method for realizing such a configuration, for example, there is a method of using a synthetic resin core material 4 in which a material 4a rich in elasticity is sandwiched between layers in the center.

  FIGS. 6-8 is a figure which shows the snowboard 30 of the other Example of this invention, Comprising: The same code | symbol is attached | subjected to the member of the structure similar to the snowboard 10 of the said Example, and the description is abbreviate | omitted. .

  In the production of the snowboard 30 of the present embodiment, the synthetic resin core material 4 is additionally arranged as a core 11 of the snowboard 30 at a position between the center portion and the edges (both ends). Is used. A plurality of concave grooves G1, G2, G3 formed in a wave shape are formed on the upper surface of the synthetic resin core material 4 so as to avoid a position where a plurality of the screw holes 9 are formed. Form along the direction.

  The groove G1 formed in the center of the snowboard 30 has a length in the longitudinal direction of about 420 mm, a groove width of 5 mm, and a maximum depth of 5 mm. The grooves G2 and G3 are formed in the longitudinal direction. The length is about 180 mm and the groove width is 5 mm, but the depth is about 5 to 3 mm so as to become shallower toward the end side according to the change in the thickness of the snowboard 30.

The ABS resin constituting the synthetic resin core material 4 has a coefficient of thermal expansion of 6 × 10 ⁻⁵ / ° C. to 13 × 10 ⁻⁵ / ° C. and a Young's modulus of about 3 Gpa. By forming the grooves G1 to G3 along the longitudinal direction of the snowboard from the upper surface in the core material 4, release of internal stress caused by thermal expansion that has occurred at the time of molding in the synthetic resin core material 4 portion (Release internal residual stress after molding) results in a convex shape in which the sliding surface protrudes downward in the direction intersecting the longitudinal direction of the snowboard.

As a material used for the synthetic resin core material 4, the thermal expansion coefficient is about 6 × 10 ⁻⁵ / ° C. to 13 × 10 ⁻⁵ / ° C. even if it is other than the ABS resin, and the Young's modulus is 1. A material having a strength of about ˜9 Gpa and appropriate strength and durability can be suitably used as a snowboard core material.

  Accordingly, the convex shape of the snowboard 30 that protrudes downward is effectively generated on the sliding surface of the snowboard 30 without impairing the strength of the snowboard 30 at a position where a large load is applied corresponding to the foot, and the operability of the snowboard 30 is improved. In addition, it is possible to make it suitable for special sliding forms such as sliding on metal structures such as rails and boxes in attraction parks that have become popular in recent years.

  The above manufacturing method uses existing equipment for manufacturing a snowboard with a flat running surface as it is, usually by changing the formation position, length, depth, etc. of the grooves G1-G3. This is a very advantageous manufacturing method in terms of cost, because it is possible to manufacture a convex snowboard 30 having different sliding surfaces using the same equipment as that of the other snowboard.

  In the snowboard manufactured according to the above method, the sliding surface is in a flat state until the concave grooves G1 to G3 are formed on the upper surface of the snowboard corresponding to the synthetic resin core material 4, It can also be used in the same way as a snowboard.

A plurality of snowboards are manufactured by the method as described above, and a groove width of 5 mm corresponding to the synthetic resin core material 4 and a depth of 5 mm from the snowboard upper surface is provided along the length of the snowboard. When the shape of the snowboard sliding surface was tested, it was as follows.
When the length of the concave groove was 50 mm, 75 mm, 100 mm, 125 mm, and 150 mm, the snowboard sliding surface did not change to a convex shape.
When the length of the groove was 175 mm, a tendency to change to a convex shape in which the sliding surface of the snowboard convex downward was recognized.
When the length of the groove was 200 mm, the snowboard sliding surface changed to a convex shape.

  In addition, the normal snowboard uses a flat mold to mold the sliding surface, but the sliding surface may become slightly concave depending on the distortion of the internal parts. Such a snowboard is a defective product. Will be processed.

However, by forming a concave groove on the upper surface of the synthetic resin core material 4 as in the present case, it is possible to deform the sliding surface to become a convex, so that the snowboard whose sliding surface has become concave It is also possible to correct and use a flat shape or a convex shape.
When the concave grooves G1 to G3 are formed for the purpose of correcting the sliding surface, it may be shorter than the above case or only a shallow concave groove may be formed.

Furthermore, in order to control the deformation amount to the convex shape at an appropriate position, the groove widths of the concave grooves G1 to G3 may be widened or narrowed at an appropriate position.
Further, as in the snowboard 40 shown in FIG. 9, the linear concave groove G4 is formed so as to be parallel to both sides of the through groove 8 formed across the front and rear positions where the plurality of screw holes 9 are arranged. May be implemented.

  With such a configuration, the position where the sliding surface of the snowboard 30 or the snowboard 40 has a convex shape and the degree of curvature of the sliding surface can be finely set, and the performance of the snowboard 30 or the snowboard 40 can be changed according to the preference of the rider. Snowboards can be manufactured.

  In the first and second embodiments, the linear through groove 8 or the like is formed as the torsion control portion. However, the groove constituting the torsion control portion may be a curved shape such as a waveform or a broken line shape.

In addition, a torsion control unit composed of a plurality of grooves may be formed along the longitudinal center line of the snowboards 10 and 20, and in this case, not only the inside of the binding fixing position (the center part of the snowboard) but also the front and rear You may form a torsion control part in the edge part side (top side or tail side).
Furthermore, you may form a torsion control part (through-groove 8 etc.) instead of those concave grooves G1-G4 in the position which formed the concave grooves G1, G2, G3 of the snowboard 30, or the concave groove G4 of the snowboard 40.

Further, another through groove 8 may be formed in one synthetic resin core material 4 so as to be parallel to the through groove 8, and a plurality of synthetic resin core materials 4 (for example, 3) The through grooves 8 may be formed in each synthetic resin core material 4 so as to be arranged in parallel.
That is, the number of the torsion control parts including the through grooves 8 or the recessed grooves 8a and 8b may be appropriately changed to about 1 to 7.

Furthermore, although the groove width of the through groove 8 is constant in the present embodiment, the groove width may be changed at an appropriate position as long as the strength required for the snowboard is not impaired. In that case, the torsional characteristics of the snowboard can be enhanced as the groove width of the through groove 8 is increased.
However, when the synthetic resin core material 4 having a width of 20 mm is used, the groove width of the through groove 8 and the concave grooves 8a and 8b is preferably about 1 mm to 16 mm.

  The present invention is not limited to the above embodiment, and the material, dimensions, strength, etc. of each member of the snowboard 10, 20, 30, 40 can be changed as appropriate without departing from the spirit of the present invention. The forming method, shape, position, size, length, number, and the like of 8, 8a, 8b, and G1 to G4 may be changed as appropriate.

  For example, instead of the synthetic resin core material used to form the torsion control part, use a wooden core material impregnated with resin, or after forming the torsion control part on a normal wooden core material You may implement so that it may waterproof.

  The snowboard which is the subject of the present invention is a device formed in a plate shape for sliding on the snow, and any device can be used as long as it can fix the binding for fixing the boot. Any snowboard according to the present invention can be used as long as it exhibits the intended effects of the present invention. For example, even what is called a ski formed in a wide width can be applied to the invention described in the claims of the present invention as long as the effects similar to the present invention are achieved by the same configuration as the present invention. included.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used in a snowboard that improves torsional characteristics without deteriorating resilience and has excellent sliding performance and its manufacture.

DESCRIPTION OF SYMBOLS 1 Sliding surface material 2 Edge material 3 Wooden core material 4 Synthetic resin core material 4a Elastic material 5 Frame material 6 FRP layer 7 Surface sheet 8 Through groove 8a Concave groove 8b Concave groove 9 Screw hole 10 Snowboard 11 Core 20 Snowboard 30 Snowboard 40 Snowboard G1-G4 Groove L Longitudinal length

Claims (4)

A snowboard in which a torsion control part comprising a through groove extending from the upper surface of the snowboard to the sliding surface along the longitudinal direction of the snowboard is formed, and the groove width on the upper surface side of the torsion control part is larger than the groove width on the sliding surface side. A snowboard that is designed to be wide . A snowboard comprising a torsion control unit comprising a groove formed on the upper surface of the snowboard along the longitudinal direction of the snowboard, and a groove formed on a sliding surface corresponding to a position directly below the groove , the torsion control unit The snowboard is characterized in that the groove width on the upper surface side is configured to be wider than the groove width on the sliding surface side . 3. The snowboard according to claim 1 , wherein the torsion control unit is formed in a center portion of the snowboard so as to avoid a position where the binding is fixed . A synthetic resin core material is partially used as an insert for the snowboard, and the torsion control portion is formed at a position corresponding to the synthetic resin core material. The snowboard as described in any one of.

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