On-snow sled

Abstract

[Problem] To provide an on-snow sled, the orientation of which can be easily changed. [Solution] In this on-snow sled S, a rear side fin (projection) 3 provided on a side nearer to a rear end Z than a tip A of the on-snow sled S is provided on a rear surface side 2 of the on-snow sled 3, which is a snow abutting surface, and the rear side fin (projection) is 1 / 2 or shorter or 1 / 3 or shorter of the maximum dimension in the longitudinal direction of the on-snow sled.

Description

SNOW SLED TECHNICAL FIELD

[0001] The present invention relates to a snow sled, and more particularly to a snow sled which can be easily changed its direction. BACKGROUND ART

[0002] As a snow sled, there is a structure described in Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. 2004-534626 (refer to Patent Literature) This is a vehicle (1) for travelling over snow or the like and comprising a straight runner means (19) and one or more curved runners (21, 23, 25) convex towards the straight runner means.

[0003] In a case where the vehicle is level, it travels on the straight runner means in a straight line. By rolling the vehicle to one side, one of the curved runners engages the snow and the vehicle performs a carving turn whose radius is determined by the radius of the runner. Different turn radii are selectable by altering the roll angle of the vehicle. Embodiments are described for use on snow and ice and a wheeled version for use on hard surfaces is also disclosed (refer to Patent Literature). CITATION LIST PATENT LITERATURE

[0004] Patent Literature 1: Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. 2004-534626 SUMMARY OF INVENTION PROBLEM TO BE SOLVED BY INVENTION

[0005] However, the vehicle mentioned above has a problem that the vehicle has a great resistance and cannot be easily changed its direction, since the carving faces (21, 23, 25) are provided approximately over an entire length of the vehicle in the longitudinal direction.

[0006] The present invention aims to provide a snow sled developed with a focus on the above-described point. SOLUTION TO PROBLEM

[0007] A snow sled described in claim 1 is structured such that one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled is provided in a back surface side of the snow sled corresponding to a snowcontacting surface, and a longitudinal direction of the rear side fin passes through a center of a width of the snow sled.

[0008] Further, a snow sled described in claim 2 is structured such that one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, the rear side fin passes through a center of a width of the snow sled, and a part in the back surface side of the snow sled provided with the rear side fin is a part which is curved toward a front or top surface side of the snow sled.

[0009] Further, a snow sled described in claim 3 is structured such that one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, the rear side fin passes through a center of a width of the snow sled, a cross sectional shape orthogonal to a longitudinal direction of a right edge portion of the snow sled positioned in the right side of the rear side fin in a front view is a groove shape with L-shaped cross section, and a cross sectional shape orthogonal to a longitudinal direction of a left edge portion of the snow sled positioned in the left side of the rear side fin in a front view is a groove shape with inverted L-shaped cross section.

[0010] Further, a snow sled described in claim 4 is structured such that one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, and passes through a center of a width of the snow sled, and one leading side fin disposed in a side nearer the leading end than the rear end of the snow sled is provided in a back surface side of the snow sled corresponding to the snow-contacting surface, and passes through the center of the width of the snow sled, and the rear side fin and the leading side fin are linearly arranged.

[0011] Further, a snow sled described in claim 5 is structured such that at least two rear side fins disposed in a side nearer a rear end than a leading end of the snow sled are provided in a back surface side of the snow sled corresponding to a snow-contacting surface, one of the two rear side fins is a right sided rear side fin disposed in a side nearer a right side than a center line in a longitudinal direction at the center of the snow sled, and the other one is a left sided rear side fin disposed in a side nearer a left side than the center of the snow sled, respectively, and an opening portion facing outward in a back view is provided between the right sided rear side fin and the left sided rear side fin.

[0012] Further, a snow sled described in claim 6 is structured such that at least two rear side fins disposed in a side nearer a rear end than a leading end of the snow sled are provided in a back surface side of the snow sled corresponding to a snow-contacting surface, one of the two rear side fins is a right sided rear side fin disposed in a side nearer a right side than a center line in a longitudinal direction at the center of the snow sled in a back view, and the other one is a left sided rear side fin disposed in a side nearer a left side than the center of the snow sled in a back view, respectively, and a leading side fin disposed in a side nearer the leading end than the rear end of the sled is provided in the back surface side of the snow sled corresponding to the snow-contacting surface, the leading side fin is positioned within an extension line of the right sided rear side fin and the left sided rear side fin in a back view, and the leading side fin passes through a center of a width of the snow sled.

[0013] Further, a snow sled described in claim 7 is structured such that one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, the rear side fin passes through a center of a width of the snow sled, and a right side groove portion is provided in a longitudinal direction of a right edge portion of the snow sled positioned in a right side of the rear side fin in a front view, and a left side groove portion is provided in a longitudinal direction of a left edge portion of the snow sled positioned in a left side of the rear side fin in a front view, respectively.

[0014] Further, a snow sled described in claim 8 is structured such that a cross sectional shape orthogonal to the longitudinal direction of the fin is formed as an outward tapered shape, in the snow sled described in any one of claims 1 to 7.

[0015] Further, a snow sled described in claim 9 is structured such that a length of the fin in the longitudinal direction is one half or less of the maximum size of the snow sled in the longitudinal direction, in the snow sled described in any one of claims 1 to 7. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic perspective view of a used state of a snow sled according to the present invention. Fig. 2 is a schematic front elevational view of Fig. 1. Fig. 3 is a schematic back elevational view of Fig. 2. Fig. 4 is a schematic right side elevational view of Fig. 2. Fig. 5 is a schematic bottom elevational view of Fig. 2. Fig. 6 is a schematic plan view of Fig. 2. Fig. 7 is a schematic cross sectional view taken along line A-A in Fig. 3. Fig. 8 is a schematic cross sectional view taken along line B-B in Fig. 3. Fig. 9 is a schematic cross sectional view taken along line C-C in Fig. 3. Fig. 10 is a schematic cross sectional view taken along line D-D in Fig. 3. Fig. 11 is a schematic front elevational view of a snow sled according to the other different embodiment from the snow sled described in Figs. 1 to 10. Fig. 12 is a schematic cross sectional view taken along line E-E in Fig. 11. Fig. 13 is a schematic cross sectional view taken along line F-F in Fig. 11. Fig. 14 is a schematic cross sectional view taken along line G-G in Fig. 11. Fig. 15 is a schematic front elevational view of a snow sled according to the other different embodiment from the snow sled described in Figs. 11 to 14. Fig. 16 is a schematic cross sectional view taken along line H-H in Fig. 15. Fig. 17 is a schematic cross sectional view taken along line I-I in Fig. 15. Fig. 18 is a schematic front elevational view of a snow sled according to the other different embodiment from the snow sled described in Figs. 15 to 17. Fig. 19 is a schematic back elevational view of Fig. 18. Fig. 20 is a schematic cross sectional view taken along line J-J in Fig. 18. Fig. 21 is a schematic cross sectional view taken along line K-K in Fig. 18. Fig. 22 is a schematic cross sectional view taken along line L-L in Fig. 18. Fig. 23 is a schematic cross sectional view taken along line M-M in Fig. 18. Fig. 24 is a schematic back elevational view of a snow sled according to the other different embodiment from the snow sled described in Figs. 18 to 23. Fig. 25 is a schematic cross sectional view taken along line N-N in Fig. 24. Fig. 26 is a schematic cross sectional view taken along line O-O in Fig. 24. DESCRIPTION OF EMBODIMENTS

[0017] A description will be given of a snow sled according to embodiments of the present invention with reference to Figs. 1 to 26.

[0018] Embodiment 1 (Figs. 1 to 10) Reference symbol S shown in Fig. 1 denotes a snow sled. For example, the snow sled S has a length of about 125 cm, a width of about 27.5 cm and a thickness of about 15 mm. Reference numeral 1 denotes a front or top surface side of the snow sled S, and reference numeral 2 denotes a back or bottom surface side of the snow sled S. The snow sled S is made of wood, for example. A rear side fin (projection) 3 (refer to Fig. 3), a front side fin (projection) 4 (refer to Figs. 15 and 24), a right sided rear side fin (projection) 5 (refer to Fig. 19) and a left sided rear side fin (projection) 6 (refer to Fig. 19) mentioned later on a surface in the surface side 1 of the snow sled S and the back surface side 2 of the snow sled S may be formed by a glass fiber reinforced plastic (FRP). Alternatively, the snow sled S including the rear side fin (projection) 3 (refer to Fig. 3), the front side fin (projection) 4 (refer to Figs. 15 and 24), the right sided rear side fin (projection) 5 (refer to Fig. 19) and the left sided rear side fin (projection) 6 (refer to Fig. 19) mentioned later may be formed by the glass fiber reinforced plastic (FRP). Although not being illustrated, roots of the rear side fin (projection) 3 (refer to Fig. 3), the front side fin (projection) 4 (refer to Figs. 15 and 24), the right sided rear side fin (projection) 5 (refer to Fig. 19) and the left sided rear side fin (projection) 6 (refer to Fig. 19) may be reinforced by roping. Further, reference symbol D shown in Figs. 1 and 2 denotes a deck pad. The deck pad D is used for preventing a foot from sliding on a deck (s surface on which a foot rests). Reference symbol E denotes a leach cord corresponding to a cord for connecting the snow sled S and a rider of the snow sled S.

[0019] Reference numeral 3 shown in Fig. 3 is the rear side fin (projection), the rear side fin (projection) 3 disposed in a side nearer a rear end Z than a leading end A of the snow sled S is provided in the back surface side 2 of the snow sled S corresponding to a snow-contacting surface, and the rear side fin (projection) 3 has a length (for example, about 35 cm) which is equal to or less than one half or one third of a maximum size X1 (for example, about 125 cm) of the snow sled S in a longitudinal direction X.

[0020] In a front edge portion 31 and a rear edge portion 32 of the rear side fin (projection) 3 of the snow sled S in the longitudinal direction X, heights (for example, about 3 mm to about 15 mm) thereof from the back surface of the snow sled S are set to be lower than that in a center portion 33 of the rear side fin (projection) 3 of the snow sled S in the longitudinal direction X. Thus, the snow sled S goes in and out of the snow (gets into the snow and gets out of the snow) smoothly (with a reduced resistance), and it is possible to enjoy the snow sled S. A shape and a height of the projection are the same in the front side fin (projection) 4 (refer to Figs. 15 and 24), the right sided rear side fin (projection) 5 (refer to Fig. 19) and the left sided rear side fin (projection) 6 (refer to Fig. 19) mentioned later. Further, as shown in Fig. 4, a maximum height H (for example, about 3 mm to about 15 mm) of the rear side fin (projection) 3 from the back surface of the snow sled S is set to be equal to a maximum thickness (for example, about 15 mm) of the snow sled S or smaller than the maximum thickness (for example, about 15 mm). Thus, it is possible to reduce a load applied to the rear side fin (projection) 3, and prevent the rear side fin (projection) 3 from being damaged and being changed its direction rapidly.

[0021] Therefore, according to the snow sled S mentioned above, the rear side fin (projection) 3 disposed in the side nearer the rear end Z than the loading end A of the snow sled S is provided in the back surface side 2 of the snow sled S corresponding to the snow-contacting surface, and the rear side fin (projection) 3 has the length which is equal to or less than one half or one third of the maximum size X1 of the snow sled S in the longitudinal direction. Thus, it is possible to turn on the basis of a weight transfer of the rider by a rider operation of weight applying degree and enjoy the snow sled S, in comparison with the structure in which the fin (projection) 3 is provided substantially over an entire length of the snow sled S in the longitudinal direction.

[0022] Embodiment 2 (Figs. 11 to 14) An embodiment 2 is structured by cutting both sides of the back surface side 2 of the snow sled S according to the embodiment 1 (Figs. 1 to 10) mentioned above in the longitudinal direction X of the snow sled S, to provide a right side groove portion M1 and a left side groove portion M2, respectively. The right side groove portion M1 is provided in a longitudinal direction of a right edge portion of the snow sled positioned in a right side of the rear side fin in a front view, and the left side groove portion M2 is provided in a longitudinal direction of a left edge portion of the snow sled positioned in a left side of the rear side fin in a front view. The other structure than the right side groove portion M1 and the left side groove portion M2 is the same as the embodiment 1 (Figs. 1 to 10) mentioned above, and a description thereof will be omitted by attaching the same reference numerals to the same portions. It is possible to reduce speed of the snow sled S during traveling or stop the traveling of the snow sled S by setting the right side groove portion M1 and the left side groove portion M2.

[0023] Embodiment 3 (Figs. 15 to 17) An embodiment 3 is structured by providing a front side fin (projection) 4 in a front side of the back surface side 2 of the snow sled S according to the embodiment 1 (Figs. 1 to 10) mentioned above.

[0024] More specifically, the front side fin (projection) 4 disposed in the side nearer the leading end A than the rear end Z of the snow sled S is provided in the back surface side 2 of the snow sled S corresponding to the snowcontacting surface, and the front side fin (projection) 4 has a length which is equal to or less than one half or one third of the maximum size X1 of the snow sled S in the longitudinal direction X.

[0025] According to the snow sled S mentioned above, the rider can turn on the basis of the rider weight transfer according to the place by utilizing any of the rear side fin (projection) 3 and the front side fin (projection) 4, or any of the rear side fin (projection) 3, a right sided rear side fin (projection) 5 and a left sided rear side fin (projection) 6 mentioned later, in addition to the effects of the invention described in the embodiment 1 or the embodiment 2 mentioned above, and can enjoy the snow sled S.

[0026] Embodiment 4 (Figs. 18 to 23) An embodiment 4 is structured by providing the right sided rear side fin (projection) 5 and the left sided rear side fin (projection) 6 respectively in place of the rear side fin (projection) 3 disposed at the center of the back surface side 2 of the snow sled S according to the embodiment 1 (Figs. 1 to 10) mentioned above.

[0027] More specifically, at least two rear side fins (projections) disposed in the side nearer the rear end Z than the leading end A of the snow sled S are provided in the back surface side 2 of the snow sled S corresponding to the snow-contacting surface, one of these two fins is the right sided rear side fin (projection) 5 disposed in the side nearer the right side than the center line of the snow sled S in the longitudinal direction at the center of the snow sled S, and the other one thereof is the left sided rear side fin (projection) 6 disposed in the side nearer the left side than the center of the snow sled S. The right sided rear side fin (projection) 5 and the left sided rear side fin (projection) 6 have a length which is equal to or less than one half or one third of the maximum size X1 of the snow sled S in the longitudinal direction, and the lengths of the right sided rear side fin (projection) 5 and the left sided rear side fin (projection) 6 in the longitudinal direction is about 25 cm, for example.

[0028] According to the snow sled S mentioned above, at least two rear side fins (projections) disposed in the side nearer the rear end Z than the leading end A of the snow sled S are provided in the back surface side of the snow sled S corresponding to the snow-contacting surface, one of these two fins is the right sided rear side fin (projection) 5 disposed in the side nearer the right side than the center line of the snow sled S in the longitudinal direction at the center of the snow sled S, and the other one thereof is the left sided rear side fin (projection) 6 disposed in the side nearer the left side than the center of the snow sled S. Thus, the rider can turn on the basis of the rider weight transfer by utilizing the right sided rear side fin (projection) 5 or the left sided rear side fin (projection) 6 caused by the operation of the rider weight applying degree, in comparison with the structure in which the fin (projection) is provided substantially over an entire length of the snow sled in the longitudinal direction, and can enjoy the snow sled S.

[0029] Embodiment 5 (Figs. 24 to 26) An embodiment 5 is structured such that the front side fin (projection) 4 is provided in the front side of the back surface side 2 of the snow sled S according to the embodiment 4 (Figs. 18 to 23) mentioned above.

[0030] More specifically, the front side fin (projection) 4 disposed in the side nearer the leading end A than the rear end Z of the snow sled S is provided in the back surface side of the snow sled S corresponding to the snowcontacting surface, and the front side fin (projection) 4 has a length which is equal to or less than one half or one third of the maximum size X1 of the snow sled S in the longitudinal direction X.

[0031] According to the snow sled S mentioned above, in addition to the effects of the invention described in the embodiment 1 or the embodiment 2 mentioned above, the rider can turn on the basis of the weight transfer by positioning the front side fin (projection) 4 in a rear side of the rider as occasion demands (in a case where the front side fin (projection) 4 is positioned in the rear side of the rider, the rear side fin (projection) 3 is positioned in a front side of the rider) to operate the weight applying degree in the rear side of the foot, in addition to the weight applying degree in the rear side of the foot, and can enjoy the snow sled S. REFERENCE SIGNS LIST

[0032] S: snow sled A: leading end D: deck pad E: leash cord Z: rear end X: longitudinal direction of snow sled X1: maximum size of snow sled in longitudinal direction M1: right side groove portion M2: left side groove portion 1: front or top surface side 2: back or bottom surface side 3: rear side fin (projection) 4: front side fin (projection) 5: right sided rear side fin (projection) 6: left sided rear side fin (projection)

Claims

1. A snow sled comprising:one rear side fin which is disposed in a side nearer a rear end than a leading end of the snow sled,wherein the one rear side fin is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, and a longitudinal direction of the rear side fin passes through a center of a width of the snow sled.

2. A snow sled comprising:one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled,wherein the one rear side fin is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, and the rear side fin passes through a center of a width of the snow sled, andwherein a part in the back surface side of the snow sled provided with the rear side fin is a part which is curved toward a front surface side of the snow sled.

3. A snow sled comprising:one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled,wherein the one rear side fin is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, and the rear side fin passes through a center of a width of the snow sled,wherein a cross sectional shape orthogonal to a longitudinal directionof a right edge portion of the snow sled positioned in the right side of the rear side fin in a front view is a groove shape with L-shaped cross section, andwherein a cross sectional shape orthogonal to a longitudinal direction of a left edge portion of the snow sled positioned in the left side of the rear side fin in a front view is a groove shape with inverted L-shaped cross section.

4. A snow sled comprising:one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled,wherein the one rear side fin is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, and passes through a center of a width of the snow sled,wherein one leading side fin disposed in a side nearer a leading end than a rear end of the snow sled is provided in a back surface side of the snow sled corresponding to the snow-contacting surface, and passes through the center of the width of the snow sled, andwherein the rear side fin and the leading side fin are linearly arranged.

5. A snow sled comprising:at least two rear side fins disposed in a side nearer a rear end than a leading end of the snow sled,wherein the at least two rear side fins are provided in a back surface side of the snow sled corresponding to a snow-contacting surface, one of the two rear side fins is a right sided rear side fin disposed in a side nearer a right side than a center line in a longitudinal direction at the center of the snow sled, and the other one is a left sided rear side fin disposed in a side nearer a left side than the center of the snow sled, respectively, andwherein an opening portion facing outward in a back view is providedbetween the right sided rear side fin and the left sided rear side fin.

6. A snow sled comprising:at least two rear side fins disposed in a side nearer a rear end than a leading end of the snow sled,wherein the at least two rear side fins are provided in a back surface side of the snow sled corresponding to a snow-contacting surface, one of the two rear side fins is a right sided rear side fin disposed in a side nearer a right side than a center line in a longitudinal direction at the center of the snow sled in a back view, and the other one is a left sided rear side fin disposed in a side nearer a left side than the center of the snow sled in a back view, respectively,wherein a leading side fin disposed in a side nearer the leading end than the rear end of the sled is provided in the back surface side of the snow sled corresponding to the snow-contacting surface, andwherein the leading side fin is positioned within an extension line of the right sided rear side fin and the left sided rear side fin in a back view, and the leading side fin passes through a center of a width of the snow sled.

7. A snow sled comprising:one rear side fin disposed in a side nearer a rear end than a leading end of the snow sled,wherein the one rear side fin is provided in a back surface side of the snow sled corresponding to a snow-contacting surface, the rear side fin passes through a center of a width of the snow sled,wherein a right side groove portion is provided in a longitudinal direction of a right edge portion of the snow sled positioned in a right side of the rear side fin in a front view, andwherein a left side groove portion is provided in a longitudinal direction of a left edge portion of the snow sled positioned in a left side of the rear side fin in a front view.

8. The snow sled according to any one of claims 1 to 7, wherein a cross sectional shape orthogonal to the longitudinal direction of the fin is formed as an outward tapered shape.

9. The snow sled according to any one of claims 1 to 7, wherein a length of the fin in the longitudinal direction is one half or less of the maximum size of the snow sled in the longitudinal direction.

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