Sitski

Abstract

It improves control accuracy while skiing and enables getting on and off the ski lift. [Solution] The sit ski 1 has a cushioning mechanism 10 that supports the chair part 3 on the ski board 2. The cushioning mechanism has a shoe part 11, a support frame 20 in which L-shaped flanges 20a and 20b are connected by an assembly shaft part 25, an upper link part 31, a lower link part 32, a suspension part 40, a switching link part 50, and a locking part 60. The upper link part, lower link part, support frame, and shoe part form a rectangular link mechanism 70. The locking part can lock the switching link part in the skiing position by setting the connection position of the upper end of the suspension part to a position rear and above the connection position of the upper end of the upper link, and can unlock the switching link part in the lift usage position by setting the connection position of the upper end of the suspension part to a position below the connection position of the upper end of the upper link.

Description

Technical Field

[0005] , , , , , , , , , ,

[0006]

[0001] The present invention relates to a sit-ski, and particularly to a technique suitable for use when boarding a lift.

Background Art

[0002] A sit-ski in which a disabled person or the like sits and performs a ski competition is known. The sit-ski is configured such that a ski chair is attached to at least one of the two ski boards used by able-bodied persons, and a pole member having a ski member attached to its lower end is used for the user to slide in a sitting position. [[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ The technology described in Patent Document 1 is a sliding type in which the upper shaft of the suspension moves within a straight groove, but it has the problem of having little flexibility in layout. Furthermore, the technology described in Patent Document 1 had the problem that the position of the adjustment hole for link mounting was predetermined, resulting in an excessively narrow adjustment range by the user.

[0007] This invention has been made in view of the above circumstances and aims to achieve the following objectives. 1. To reduce the space required for the mechanism. 2. To improve the flexibility of the mechanism's layout. 3. To improve control accuracy while skiing. [Means for solving the problem]

[0008] (1) A sitski according to one aspect of the present invention is A sit ski having a suspension mechanism, Skis and The chair part where the user sits, A cushioning mechanism that supports the chair portion on the ski board in a way that can absorb impact, The aforementioned cushioning mechanism is attached to the ski board by a binding (fixing) section, It has, The aforementioned buffering mechanism is The shoe portion (boot) attached to the ski by the binding portion, A support frame that supports the chair section from below, A rotatable upper link portion, the upper end of which is connected near the front end of the support frame and the lower end of which is connected to the rear position of the shoe portion, A rotatable lower link portion, the upper end of which is connected to a position lower on the support frame than the connection position of the upper end of the upper link portion, and the lower end of which is connected to a position lower in front of the shoe portion than the connection position of the lower end of the upper link portion, A retractable suspension (cushion) part whose lower end is rotatably connected to the shoe part, A switching link section (rice ball-shaped section) is rotatably connected to the support frame at a position rearward from the connection position of the upper end of the upper link, and the upper end of the suspension section is rotatably connected at a position away from the connection position of the support frame, A locking mechanism that can switch between a locked state and an unlocked state of the rotational position of the switching link part relative to the support frame during cushioning (shock damping) at the sliding position and during the upward lifting of the rear end of the support frame at the lift usage position, respectively. Equipped with, The locking mechanism allows the switching link to be locked in the sliding position, with the connection position of the upper end of the suspension section set to a position rearward and upward compared to the connection position of the upper end of the upper link, and allows the switching link to be unlocked in the lift usage position, with the connection position of the upper end of the suspension section set to a position lower than the connection position of the upper end of the upper link. The upper link portion, the lower link portion, the support frame, and the shoe portion form a rectangular link mechanism. The support frame is formed by assembling two L-shaped flanges that are spaced apart and symmetrically opposite each other with respect to a lateral vertical central plane (median plane) via a plurality of assembly shafts that extend laterally. The switching link sections are positioned close to the opposing inner surfaces of the two L-shaped flanges, The two switching link sections are rotatably connected as a single unit by a connecting shaft extending laterally, the connecting shaft is positioned near the midpoint between the connection position of the switching link section to the support frame and the locking position by the locking section when viewed laterally, and the upper end of the suspension section is rotatably connected to the lateral center of the connecting shaft. The upper link portion and the lower link portion are connected at their upper ends to the lateral outward direction of the L-shaped flange, This resolved the above issues.

[0009] In the above configuration, at the sliding position, the upper end of the suspension section is connected between the connection points of the switching link section, which connects the support frame and the locking section in the front-rear direction. Therefore, even if play occurs when the locking section is locked, the amount of play at the upper end of the suspension section is smaller than in conventional configurations. In other words, the length from the rotational support position (connection position) of the switching link section relative to the support frame to the locking position (connection position) of the locking section is smaller than the length from the switching link section to the locking position (connection position) of the locking section. As a result, play in the locking section does not directly translate into play in the support frame, and the cushioning mechanism can more precisely transmit the load to the skis when supporting the load from the user and chair section during sliding. Consequently, ski maneuverability during sliding can be improved, and control during competitions can be enhanced.

[0010] Furthermore, unlike the technology described in Patent Document 1, there is no need to form a sliding groove (hole) in the support frame to guide the suspension upper axis when lifted up. At the same time, there is no need to maintain the strength of the support frame in order to provide multiple link mounting positions. Therefore, it becomes possible to reduce the weight of the support frame as it does not need to be made large. Consequently, the overall weight of the sit ski can be reduced, improving ski maneuverability during skiing and enhancing control during competitions. Furthermore, by switching between the locked and unlocked states of the locking mechanism, the lift can be easily used without assistance. At the same time, since there is no need to form sliding grooves (holes) in the support frame, the degree of freedom in the layout of the cushioning mechanism can be improved.

[0011] Furthermore, when the locking mechanism is unlocked, a user using a pole member (such as a trekking pole) can simply shift their center of gravity upward, causing the switching link to rotate from the locked position, the upper end of the suspension to move, and the rear end of the support frame to be easily lifted upward. This makes it easy to get onto the lift without assistance. Furthermore, two switching link portions are arranged between two substantially horizontally parallel L-shaped flanges, and the upper end of the suspension portion is connected to a connecting shaft portion that integrally and rotatably connects these two switching link portions. By arranging the suspension portion near the center between the two L-shaped flanges in the horizontal direction, space can be saved.

[0012] (2) The sit-ski of the present invention is as described in (1) above, The shoe portion has a front shoe portion and a rear shoe portion that are divided front and rear, The front shoe portion and the rear shoe portion are rotatably connected by a shoe shaft portion extending in the horizontal direction, and the front shoe portion and the rear shoe portion are connected to each other by a shoe connection portion extending in the front-rear direction and being slightly stretchable below the shoe shaft portion. The lower end of the upper link portion is connected to the rear shoe portion, The lower end of the suspension portion is connected to the front shoe portion, The shoe shaft portion coincides with the connection position of the lower end of the lower link portion when viewed in the horizontal direction. It can be done.

[0013] In the above configuration, the shoe portion bears a part of the link mechanism, and the shoe portion is divided front and rear, rotatable around the horizontal shoe shaft portion, and connected in a state where the front-rear position is restricted by the shoe connection portion. When a large load is applied, such as during sliding in competition, the shoe portion can be slightly deformed to exhibit the necessary flexibility. Moreover, since the ski board can be securely fixed by the binding portion, reliable support can be maintained while improving the fineness of load transmission. Therefore, the ski operability during sliding can be improved, and the control during competition can be improved.

[0014] (3) The sit-ski of the present invention is as described in (1) above, At least one of the upper end and the lower end of the upper link portion and the lower link portion is connected to the support frame and the shoe portion by a spherical bearing. It is possible.

[0015] In the above configuration, since the part connecting the support frame and the shoe part is a spherical bearing, rotational movement around an axis extending in the lateral direction, that is, not only, but also movement along the front and rear surfaces perpendicular to the surface of the ski board, and movement deviating from this surface are possible. Thereby, during skiing in a competition that requires extremely delicate operations, it is possible to improve the controllability of the ski that is necessary.

[0016] Furthermore, in the sit-ski of the present invention, in the above, The upper link part has an upper end formed in a bifurcated shape and a lower end formed integrally in the lateral direction. It is possible.

[0017] In the above configuration, it is possible to reduce the weight of the upper link and maintain the necessary strength, thereby improving the controllability of the ski.

[0018] Furthermore, in the sit-ski of the present invention, in the above, The upper link part and the lower link part have a length adjustment mechanism (or an arm division part). It is possible.

[0019] In the above configuration, by having a length adjustment mechanism, it is possible to adjust the lengths of the upper link part and the lower link part without causing play in a state like a configuration that fastens to the coupling hole. Thereby, it is possible to easily change and adjust the damping ratio, that is, the value obtained by dividing the movement amount of the support frame by the stroke of the suspension part, without play.

[0020] Furthermore, in the sit-ski of the present invention, in the above, The L-shaped flange with the upper rear extension part of the support frame that supports the chair part from below, and the front vertical lower part of the support frame that extends downward from the front end position of the chair part, forms. The lower part of the front apron is connected to the upper end of the lower link section at its lower end, and a leg support section is attached to the front. It is possible.

[0021] In the above configuration, the lower front section of the link mechanism is integrated with the upper rear extension to form a support frame, and is connected to the chair section and leg support section, which receive the user's center of gravity shift and load. This facilitates the transmission of motion to the skis and improves the necessary ski control. [Effects of the Invention]

[0022] According to the present invention, it is possible to achieve the following effects: saving space in the shock absorber mechanism, improving the freedom of layout of the shock absorber mechanism, improving control accuracy during skiing, and enabling lift boarding and alighting without assistance. [Brief explanation of the drawing]

[0023] [Figure 1] This is a side view showing an embodiment of the sit ski according to the present invention. [Figure 2] This is a perspective view from the upper left front showing the cushioning mechanism in an embodiment of the sit ski according to the present invention. [Figure 3] This is a perspective view from the upper right rear showing the cushioning mechanism in an embodiment of the sit ski according to the present invention. [Figure 4] This is a partially disassembled perspective view illustrating the shoe portion of an embodiment of the sit ski according to the present invention. [Figure 5] This is an exploded perspective view showing the support frame in an embodiment of the sit-ski according to the present invention. [Figure 6] This is an enlarged perspective view showing a portion of the support frame and assembly shaft in an embodiment of the sit-ski according to the present invention. [Figure 7] This is a perspective view showing a portion of the upper link section in an embodiment of the sit-ski according to the present invention, with parts removed for illustrative purposes. [Figure 8]This is a partially disassembled perspective view illustrating the lower link portion in an embodiment of the sit-ski according to the present invention. [Figure 9] This is a partially disassembled perspective view illustrating the lower link portion in an embodiment of the sit-ski according to the present invention. [Figure 10] This is a partially disassembled side view illustrating the link mechanism, switching link section, and suspension section in an embodiment of the sit-ski according to the present invention. [Figure 11] This is a perspective view showing a portion of the sit-ski embodiment according to the present invention, disassembled to illustrate the switching link section, suspension section, and other components. [Figure 12] This is an exploded perspective view illustrating the switching link section and connecting shaft section in an embodiment of the sit-ski according to the present invention. [Figure 13] This is a side view illustrating the operation of the cushioning mechanism in an embodiment of the sit ski according to the present invention. [Figure 14] This is a side view illustrating the operation of the cushioning mechanism in an embodiment of the sit ski according to the present invention. [Figure 15] This is a side view illustrating the operation of the cushioning mechanism in an embodiment of the sit ski according to the present invention. [Figure 16] This is a side view illustrating the operation of the cushioning mechanism in an embodiment of the sit ski according to the present invention. [Modes for carrying out the invention]

[0024] Hereinafter, embodiments of the sit ski according to the present invention will be described with reference to the drawings. Figure 1 is a side view showing a sit ski in this embodiment. In the figure, reference numeral 1 denotes a sit ski. In the following description, the forward direction of the skiing direction is defined as the X direction, the upward vertical direction as the Z direction, and the rightward direction of the user in the lateral direction as the Y direction. The X, Y, and Z directions are orthogonal to each other.

[0025] The sit-ski 1 according to this embodiment can be used for seated skiing for people with disabilities. The sit-ski 1 can be used in ski competitions for people with disabilities, such as slalom, giant slalom, super giant slalom, and downhill. As shown in Figure 1, the sit ski 1 according to this embodiment includes a ski board 2, a chair section 3, a leg support section 4, a binding section (fixing section) 5, and a cushioning mechanism 10.

[0026] The chair section 3 is where the user sits. The chair section 3 may be formed to cover the user's waist and thighs. The chair section 3 is attached to the skis 2 via a cushioning mechanism 10. The leg support section 4 supports the legs of the user sitting in the chair section 3. The leg support section 4 also serves as a windbreak. The leg support section 4 may have a portion that contacts the rear side of the user's calf and a portion that contacts the front side of the user's shin. Furthermore, the leg support section 4 may also have a portion that contacts the legs laterally. The leg support section 4 may be provided so as to cover the user's legs.

[0027] The binding unit 5 attaches the shock absorption mechanism 10 to the ski 2. The binding unit 5 may also be designed so that the shock absorption mechanism 10 is detachable from the ski 2. The binding unit 5 and the ski 2 can also be the same shape as skis used by able-bodied individuals. The shock-absorbing mechanism 10 supports the chair section 3 on the ski board 2 in a way that allows it to absorb impact.

[0028] Figures 2 and 3 are perspective views showing the sliding position of the cushioning mechanism in this embodiment. As shown in Figures 2 and 3, the shock absorber mechanism 10 comprises a shoe portion 11, a support frame 20, an upper link portion 31, a lower link portion 32, a suspension portion 40, a switching link portion 50, and a locking portion 60. The shoe portion 11 is located at the bottom of the cushioning mechanism 10. The shoe portion 11 is attached to the ski 2 by the binding portion 5. The shoe portion 11 may be fixed to and detached from the ski 2 by the binding portion 5, similar to ski boots used by able-bodied individuals.

[0029] Figure 4 is a partially disassembled perspective view illustrating the shoe portion in this embodiment. As shown in Figures 2 to 4, the shoe portion 11 has a front shoe portion 11a, a rear shoe portion 11b, a shoe shaft portion 11c, and a shoe connecting portion 11d. The front shoe portion 11a and the rear shoe portion 11b are divided into front and rear sections in the X direction. The shoe shaft portion 11c extends in the Y direction (lateral). The shoe shaft portion 11c rotatably connects the front shoe portion 11a and the rear shoe portion 11b to each other. The shoe shaft portion 11c is also used in conjunction with the rotation axis, which is the connection point of the lower end 32b of the lower link portion 32, which will be described later. The lower end 41b of the suspension section 40 is rotatably connected to the front shoe section 11a at a position forward and above the shoe shaft section 11c. The lower end 31b of the upper link section 31, which will be described later, is rotatably connected to the rear shoe section 11b at a position rear and above the shoe shaft section 11c.

[0030] The front shoe portion 11a and the rear shoe portion 11b are connected to each other by a shoe connector portion 11d. The shoe connector portion 11d extends in the X direction. The shoe connector portion 11d is located below the shoe shaft portion 11c. The shoe connector portion 11d is slightly extendable and retractable in the X direction. The front end of the shoe connector portion 11d is rotatably connected to the front shoe portion 11a at a position forward of the shoe shaft portion 11c. The rear end of the shoe connector portion 11d is rotatably connected to the rear shoe portion 11b at a position rearward of the shoe shaft portion 11c. The front and rear ends of the shoe connector portion 11d and the shoe shaft portion 11c are linked in a triangular shape when viewed in the Y direction. The shoe portion 11 is displaceable, with the front shoe portion 11a and the rear shoe portion 11b being able to move around the shoe shaft portion 11c. At this time, the movement of the front shoe portion 11a and the rear shoe portion 11b is restricted by the shoe connection portion 11d. As a result, the shoe portion 11 is securely fixed to the ski 2, while reliably transmitting the user's fine movements to the ski 2 via the cushioning mechanism 10.

[0031] The support frame 20 has an upper rear extension 21 and a front hanging lower part 22. The upper rear extension 21 extends in the X direction along the ski 2. The upper rear extension 21 supports the chair section 3 from below. The upper rear extension 21 is located at the very top of the cushioning mechanism 10. The upper rear extension 21 is connected directly below the chair section 3. The front apron portion 22 extends downward along the Z direction from the front end of the upper rear extension portion 21. The front apron portion 22 and the upper rear extension portion 21 are formed in a roughly L-shape when viewed from the side. The front apron portion 22 supports the leg support portion 4 from the rear.

[0032] Figure 5 is an exploded perspective view showing the support frame in this embodiment. Figure 6 is an enlarged perspective view showing a portion of the support frame and assembly shaft in this embodiment, with parts of them disassembled to illustrate them. As shown in Figures 2, 3, 5, and 6, the support frame 20 is formed by assembling two L-shaped flanges 20a and 20b that are spaced apart and symmetrically opposite each other with respect to a central plane (median plane) in the Y direction perpendicular to the skis 2, via a plurality of assembly shafts 25 extending in the Y direction. The L-shaped flanges 20a and 20b are approximately parallel to each other along the approximately XZ plane. The L-shaped flanges 20a and 20b are connected by the assembly shafts 25 spanning between them.

[0033] The assembly shaft portion 25 has a hollowed-out section to reduce weight. The assembly shaft portion 25 is located on the upper surface of the upper rear extension portion 21 and on the front surface of the front lower section 22. A snow cover 26 is attached to the lower surface of the upper rear extension portion 21. The rear surface of the front lower section 22 does not have a cover so as not to hinder the movement of the suspension portion 40. A connecting member 27 is attached to the lower end of the front lower section 22. The connecting member 27 supports the leg support portion 4. The connecting member 27 protrudes forward in the X direction from the lower end of the front lower section 22 (see Figures 1 and 5).

[0034] Figure 7 is an exploded perspective view showing the upper link section in this embodiment. As shown in Figures 2, 3, and 7, the upper link portion 31 has its upper end 31a rotatably connected to the vicinity of the upper front end of the front hanging portion 22, and its lower end 31b rotatably connected to the rear position of the shoe portion 11. The upper link portion 31 is integrally formed near the lower end 31b, and the upper end 31a is formed in a bifurcated shape. The upper end 31a is connected to the outside in the Y direction of the L-shaped flanges 20a and 20b. The rotation axes of the upper end 31a and the lower end 31b are aligned in the Y direction. The bifurcated upper end 31a sandwiches the support frame 20 from the outside in the Y direction.

[0035] The upper end 31a is connected by a spherical bearing SB to allow for three-dimensional movement. The lower end 31b may also be connected in a similar manner to allow for three-dimensional movement. The lower end 31b is positioned inside the L-shaped flanges 20a and 20b in the Y direction. In the following explanation, the connecting rotation axes of the upper link section 31 may be referred to as the upper end 31a and the lower end 31b, respectively.

[0036] The upper link portion 31 has a length adjustment mechanism 80. The upper link section 31 has a bifurcated upper end 31a which can be attached to the lower end 31b. Both bifurcated, rod-shaped upper ends 31a can be firmly attached to the lower end 31b by bolting or the like. Here, interchangeable upper ends 31a of different lengths can be provided. By making upper ends 31a of different lengths interchangeable, a length adjustment mechanism 80 is formed.

[0037] Figure 8 is an exploded perspective view showing the lower link section in this embodiment. Figure 9 is a partial perspective view showing a portion of the lower link section in this embodiment, with parts of it disassembled to illustrate the concept. As shown in Figures 2, 3, 8, and 9, the lower link section 32 has its upper end 32a rotatably connected to the lower rear end position of the front apron lower section 22, and its lower end 32b rotatably connected to the shoe section 11. The upper end 32a is connected to the front apron lower section 22 at a position lower and rearward than the connection position of the upper end 31a of the upper link section 31. The upper end 32a is connected to the lower end of the front apron lower section 22. The lower end 32b is connected to the shoe section 11 at a position lower and forward than the connection position of the lower end 31b of the upper link section 31. The lower end 32b coincides with and serves the shoe shaft section 11c.

[0038] The lower link section 32 is formed as two rods that are close to the outside of the support frame 20 in the Y direction. The upper end 32a is connected to the outside of the L-shaped flanges 20a and 20b in the Y direction. The rotation axes of the upper end 32a and the lower end 32b are aligned in the Y direction. The two upper ends 32a sandwich the support frame 20 from the outside in the Y direction. The two lower ends 32b sandwich the front end of the rear shoe section 11b from the outside in the Y direction.

[0039] As shown in Figure 9, the upper end 32a and the lower end 32b are both connected by spherical bearings SB to allow for three-dimensional movement. Similar to the upper link section 31, the connecting rotation axes of the lower link section 32 are sometimes referred to as the upper end 32a and the lower end 32b, respectively. The upper end 32a is attached to the lower part of the front apron 22 via hollow dowel pins B, which serve as bushings that penetrate both the L-shaped flanges 20a and 20b.

[0040] As shown in Figure 6, the hollow dowel pin B is formed in a cylindrical shape with flanges connected to the inner Y-direction positions of the L-shaped flanges 20a and 20b, and the flanges are attached to the L-shaped flanges 20a and 20b, respectively, by pins P. Multiple pins P are arranged around the flange of the hollow dowel pin B. The pins P are attached to the inner Y-direction surfaces of the L-shaped flanges 20a and 20b, respectively. The pins P also serve to prevent the hollow dowel pin B from rotating. Similarly, the upper link portion 31 can also be attached to the support frame 20 via pins P and the hollow dowel pin B.

[0041] The lower link section 32 has a length adjustment mechanism 80. The lower link section 32 has a replaceable rod section 32c sandwiched between the upper end 32a and the lower end 32b in the longitudinal direction. By preparing rod sections 32c of different lengths and swapping them out, the length of the lower link section 32 can be adjusted. By making the rod sections 32c of different lengths interchangeable, a length adjustment mechanism 80 for the lower link section 32 is constructed.

[0042] Furthermore, the rod portion 32c is formed so that both ends have reverse threads. The mounting portions of the upper end 32a and the lower end 32b are each formed so that they have reverse threads corresponding to the rod portion 32c. The rod portion 32c is attached to the upper end 32a and the lower end 32b by rotating the rod portion 32c. By rotating the rod portion 32c, which is formed as a reverse thread, the length adjustment mechanism 80 for the lower link portion 32 is configured. At the same time, the rod portion 32c can be easily replaced.

[0043] The upper link portion 31, the lower link portion 32, the front apron portion 22, and the rear shoe portion 11b form a rectangular link mechanism 70. The link mechanism 70 forms a deformable quadrilateral when viewed in the Y direction. The link mechanism 70 can change its orientation relative to the ski 2 because its component, the rear shoe portion 11b, is fixed to the ski 2. When the link mechanism 70 deforms, the lengths of each link, namely the upper link portion 31, the lower link portion 32, the front skirt portion 22, and the rear shoe portion 11b, do not change; only the connection angle changes. The operation of the link mechanism 70 is determined by the distance between the lower ends 31b and 32b of the rear shoe portion 11b, the distance between the upper ends 31a and 32a of the front skirt portion 22, the inclination angles of the upper link portion 31 and the lower link portion 32 relative to the ski 2, and the difference between the length dimension of the upper link portion 31 and the length dimension of the lower link portion 32.

[0044] As the link mechanism 70 deforms, the inclination angle of the support frame 20 in the front-rear direction changes (see Figures 13 to 16). As the link mechanism 70 deforms, the inclination angles of the chair section 3 and the leg support section 4 in the front-rear direction change. As the rear end of the upper rear extension section 21 rises, it becomes a lift position where it is possible to get on the lift. As the rear end of the upper rear extension section 21 lowers, it becomes a sliding position where shock damping by the suspension section 40 (described later) is possible. In the sliding position, the user's center of gravity moves to a forward position.

[0045] Figure 10 is a partially disassembled side view illustrating the link mechanism, switching link section, and suspension section of this embodiment. Figure 11 is a partially disassembled perspective view illustrating the switching link section, suspension section, and other parts of this embodiment. As shown in Figures 10 and 11, the suspension section 40 includes a cylinder 41 and a suspension shaft 42. The suspension section 40 is expandable and contractible in the longitudinal direction. The suspension section 40 can absorb shocks by expanding and contracting in the longitudinal direction. The suspension section 40 can employ any type of damper, such as a spring type, pneumatic type, or hydraulic type. The suspension section 40 is compressed by the load applied by the user. The suspension section 40 absorbs shocks caused by unevenness on the gliding surface during skiing, thereby reducing vibrations transmitted to the user. The suspension section 40 positions the skis 2 in a predetermined position relative to the gliding surface, enabling the skis 2 to glide stably. The suspension section 40 may also be equipped with means for adjusting the damping stiffness.

[0046] The suspension shaft 42 is located above the cylinder 41, but the mounting orientation may be reversed. The lower end 41b of the suspension section 40 is rotatably connected to the front shoe section 11a at a position forward and above the shoe shaft section 11c. The lower end 41b is connected to the front shoe section 11a at a position below the lower end 31b of the upper link section 31. The upper end 42a of the suspension section 40 is connected to the support frame 20 via a switching link section 50, which will be described later. The upper end 42a is rotatably connected to the switching link section 50, which will be described later. The connecting rotation axes of the suspension section 40 are sometimes referred to as the upper end 42a and the lower end 41b, respectively. When the suspension section 40 is compressed, the user's center of gravity shifts slightly forward. The suspension portion 40 is located in the center of the L-shaped flanges 20a and 20b in the Y direction. The suspension portion 40 is rotatable along the XZ plane, which is the vertical front-rear surface, with the lower end 41b as the center. The suspension portion 40 can be positioned to rise approximately vertically from the lower end 41b. The upper end 42a of the suspension portion 40 can be tilted forward of the lower end 41b.

[0047] Figure 12 is a perspective view showing a portion of the switching link and connecting shaft of this embodiment, with parts disassembled to illustrate them. As shown in Figures 10 to 12, the switching link section 50 includes a connecting rotating shaft 51, a connecting shaft section 52, and a locking section 53. The connecting rotation shaft 51 is a rotation axis aligned with the Y direction. The connecting rotation shaft 51 rotatably connects the switching link section 50 to the support frame 20. The connecting rotation shaft 51 is rotatably connected to the support frame 20 at a position rearward of the upper end 31a of the upper link section 31. The connecting rotation shaft 51 is connected to the support frame 20 at a position close to the rearward of the upper end 31a of the upper link section 31. The connecting shaft section 52 extends along the Y direction. The connecting rotation shaft 51 and the connecting shaft section 52 are rotation axes that extend in the Y direction. The locked section 53 is a locked position in which the rotation of the switching link section 50 is restricted and locked by the locking section 60, which will be described later.

[0048] The switching link section 50 is formed in a plate shape with a roughly triangular contour when viewed in the Y direction. The switching link section 50 is connected parallel to the L-shaped flanges 20a and 20b. When viewed in the Y direction, the switching link section 50 has a connecting rotating shaft 51 and a locked portion 53 at both ends in the longitudinal direction. When viewed in the Y direction, the switching link section 50 has a connecting shaft section 52 positioned near the center between the connecting rotating shaft 51 and the locked portion 53, and spaced apart in a direction perpendicular to the line connecting the connecting rotating shaft 51 and the locked portion 53. The switching link section 50 is made lighter by forming a weight-reducing section that penetrates in the Y direction near the center between the connecting rotating shaft 51 and the locked portion 53.

[0049] The connecting rotating shaft 51, the connecting shaft portion 52, and the locked portion 53 are respectively positioned near the corners of the contour of the switching link portion 50, which is roughly triangular when viewed in the Y direction. The distance between the connecting shaft portion 52 and the locked portion 53, as viewed in the Y direction, is approximately the same as the distance between the connecting rotating shaft 51 and the connecting shaft portion 52, as viewed in the Y direction. The distance between the connecting shaft portion 52 and the locked portion 53, as viewed in the Y direction, is slightly smaller than the distance between the connecting rotating shaft 51 and the connecting shaft portion 52, as viewed in the Y direction. The sum of the distance between the connecting rotating shaft 51 and the connecting shaft portion 52, as viewed in the Y direction, and the distance between the connecting shaft portion 52 and the locked portion 53, as viewed in the Y direction, is greater than the distance between the connecting rotating shaft 51 and the locked portion 53, as viewed in the Y direction.

[0050] The two switching link sections 50 are positioned close to the opposing inner surfaces of the L-shaped flanges 20a and 20b, respectively. Both switching link sections 50 are parallel to the L-shaped flanges 20a and 20b. The switching link section 50 on the right side in the Y direction is rotatable relative to the L-shaped flange 20a by the connecting rotation shaft 51. The switching link section 50 on the left side in the Y direction is rotatable relative to the L-shaped flange 20b by the connecting rotation shaft 51.

[0051] The connecting shaft 52 is spanned and connected in the Y direction between the two switching link sections 50. The connecting shaft 52 rotatably connects the two switching link sections 50 as a single unit. The upper end 42a of the suspension section 40 is rotatably connected to the connecting shaft 52 at its center in the Y direction. The upper end 42a of the suspension section 40 is spaced apart from the two switching link sections 50 located on either side in the Y direction. Similar to the upper end 32a of the suspension section 40, the upper end 42a of the connecting shaft 52 can be connected via a hollow dowel pin.

[0052] The locking portion 53 on the right side in the Y direction allows the switching link portion 50 to be locked and unlocked relative to the L-shaped flange 20a. The locking portion 53 on the left side in the Y direction allows the switching link portion 50 to be locked and unlocked relative to the L-shaped flange 20b by the connecting rotating shaft 51. With the locked portion 53 locked to the support frame 20 by the locking portion 60, the connecting shaft portion 52 is positioned above the straight line connecting the connecting rotation shaft 51 and the locked portion 53. The switching link section 50 has a range of rotation around the connecting rotation axis 51 until the locked portion 53 is locked to the support frame 20 by the locking portion 60. When the locked portion 53 is in its lowest position, the switching link section 50 has a range of rotation around the connecting rotation axis 51 until the locked portion 53 coincides with the rear end of the front apron lower portion 22 when viewed in the Y direction. When the switching link section 50 rotates around the connecting rotation shaft 51 and the locked section 53 reaches its lowest position, the connecting shaft section 52 can contact the rear end of the front apron lower section 22 when viewed in the Y direction. When the switching link section 50 rotates around the connecting rotation shaft 51 and the locked section 53 reaches its lowest position, the suspension section 40 is standing almost vertically.

[0053] The locking unit 60 can switch between a locked state and an unlocked state of the rotational position of the switching link unit 50 relative to the support frame 20. The locking unit 60 locks the switching link unit 50 in the sliding position. The locking unit 60 restricts the rotation of the switching link unit 50 relative to the support frame 20 in the sliding position. At this time, the locking unit 60 locks the locked portion 53 to the upper rear extension portion 21. The locking unit 60 locks the switching link unit 50 in the sliding position when the rear end of the upper rear extension portion 21 is lowered. The locking section 60 locks the switching link section 50 so that the connection position of the upper end 42a of the suspension section 40 is rearward and upward compared to the connection position of the upper end 31a of the upper link section 31 in the sliding position. The locking section 60 locks the connection position of the upper end 42a of the suspension section 40 to the support frame 20 so that it does not change in the sliding position. In the sliding position, the suspension section 40 is capable of cushioning (shock damping).

[0054] The locking mechanism 60 unlocks the switching link section 50 when the lift is in use. When the lift is in use, the switching link section 50 is rotatable around the connecting rotation axis 51. When the lift is in use, the locking mechanism 60 unlocks the switching link section 50, allowing the connection position of the upper end 42a of the suspension section 40 to rotate around the connecting rotation axis 51 to a position lower than the connection position of the upper end 31a of the upper link section 31. This makes it possible to lift the rear end of the upper rear extension section 21 upward when the lift is in use. The locking portion 60 is formed on the L-shaped flange 20a and the L-shaped flange 20b, respectively. The locking portion 60 has an operating handle 60a. The operating handle 60a is provided on the L-shaped flange 20a and the L-shaped flange 20b at positions on the Y-side. The left and right locking parts 60 can be operated individually, but it is preferable to switch between the locked and unlocked states simultaneously.

[0055] Figure 13 is a side view illustrating the operation of the shock absorber mechanism in the skiing position of the sit ski according to this embodiment. Figure 14 is a side view illustrating the operation of the shock absorber mechanism in the sit ski according to this embodiment. Figure 15 is a side view illustrating the operation of the shock absorber mechanism in the sit ski according to this embodiment. Figure 16 is a side view illustrating the operation of the shock absorber mechanism in the lift-using position of the sit ski according to this embodiment. In this embodiment, the sit ski 1 can be switched between a gliding position with the rear end of the upper rear extension 21 lowered, as shown in Figure 13, and a lift-use position with the rear end of the upper rear extension 21 raised, as shown in Figure 16, by the cushioning mechanism 10.

[0056] In the gliding position shown in Figure 13, the sit ski 1 is in a state where the switching link section 50 is locked to the support frame 20 by the locking section 60. At this time, the locked section 53 is located above and behind the connecting rotation axis 51. The straight line connecting the connecting rotation axis 51 and the locked section 53 is inclined upward towards the rear. The connecting shaft section 52 is located above the straight line connecting the connecting rotation axis 51 and the locked section 53. In the gliding position, the rear end of the upper rear extension section 21 is lower than the front end. The lower front apron section 22 is inclined forward at its lower end than its upper end.

[0057] In the sliding position, the upper end 42a of the suspension section 40 is located above and behind the upper end 31a of the upper link section 31. The upper end 42a of the suspension section 40 is located in front of the lower end 41b. The suspension section 40 is inclined. In this state, when a user sits on the chair section 3, the link mechanism 70 deforms to compress under the load. At the same time, the suspension section 40 supports the user's load together with the link mechanism 70. Due to the user's load, the upper end 42a of the suspension section 40 moves forward relative to the lower end 41b, increasing its inclination. Even under the user's load, the upper rear extension section 21 remains in a position where its rear end is lower than its front end. At the sliding position, a large load is applied during sliding, so the compressed suspension section 40 provides shock damping.

[0058] The user's load during gliding is supported by the link mechanism 70 and the suspension section 40. In the gliding position, the switching link section 50 is integrally fixed to the support frame 20 by the lock section 60. Therefore, the positional changes of the support frame 20 due to the load applied to the chair section 3 and the leg support section 4 are transmitted to the link mechanism 70 and the suspension section 40. At this time, in the link mechanism 70, the upper link section 31 rotates slightly around the lower end 31b. Similarly, the lower link section 32 rotates slightly around the lower end 32b. In addition, the suspension section 40 dampens the impact applied when the suspension shaft 42 extends and contracts axially relative to the cylinder 41.

[0059] Here, the switching link section 50 is configured to be rotatable around the connecting rotation shaft 51, and the locked section 53 is locked by the locking section 60. The connecting shaft section 52 is located between the connecting rotation shaft 51 and the locked section 53. Therefore, in the sliding position, the shock damping by the suspension section 40 is transmitted from the upper end 42a of the suspension section 40 to the support frame 20 via both the connecting rotation shaft 51 and the locked section 53 located at both ends of the switching link section 50 in the front-rear direction. Moreover, both ends of the switching link section 50 are directly connected to the support frame 20 by the connecting rotation shaft 51 and the locked section 53 without the need for other parts. As a result, the support frame 20 and the suspension section 40 can be firmly supported.

[0060] Furthermore, in a configuration where the switching link section 50 is rotatable around the connecting rotation shaft 51, the locked section 53 is locked by the locking section 60. The connecting shaft section 52 is positioned between the connecting rotation shaft 51 and the locked section 53. Therefore, even if the locking section 60 and the locked section 53 become loose, the amount of looseness of the connecting shaft section 52 around the connecting rotation shaft 51 will decrease in proportion to the ratio of its distance from the connecting rotation shaft 51. In other words, the looseness between the support frame 20 and the suspension section 40 can be reduced compared to when they are directly connected. Therefore, the controllability of the sit ski 1 can be improved, and its performance during competition can be further enhanced.

[0061] Furthermore, the user's load at the skiing position is applied to the shoe portion 11 by the linkage mechanism 70. Especially when a large load is applied, such as during a competition, the shoe portion 11 is slightly displaceable, with the front shoe portion 11a and the rear shoe portion 11b around the shoe shaft portion 11c. This structure allows the user's load to be transmitted to the ski 2 with precision. Therefore, the performance level of the sit ski 1 can be improved. The shock absorption mechanism 10 deforms when the link mechanism 70 is damped. At this time, the rear end of the support frame 20 moves up and down relative to the front end of the upper rear extension 21. The inclination range of the support frame 20 is restricted by the contact between the upper surface of the upper link portion 31 and the assembly shaft portion 25 at the rear end of the upper rear extension 21.

[0062] When a user boards the lift, they first operate the operating handle 60a of the locking unit 60 to release the lock. This releases the lock on the locked unit 53 to the support frame 20. As a result, the switching link unit 50 can rotate freely around the connecting rotation axis 51 relative to the support frame 20. In other words, the user can independently release the lock to switch between the sliding position and the lift usage position while seated in the chair unit 3.

[0063] In this state, the user uses the pole member to distribute the load and move the center of gravity upward. As a result, as shown in Figure 14, the upper link section 31 rotates around the lower end 31b in a direction in which the upper end 31a moves backward relative to the lower end 31b. Similarly, the lower link section 32 rotates around the lower end 32b in a direction in which the upper end 32a moves backward relative to the lower end 32b. Along with this deformation of the link mechanism 70, the switching link section 50 rotates around the connecting rotation shaft 51 in a direction in which the rear of the line connecting the connecting rotation shaft 51 and the locked section 53 moves downward. Due to the rotation of the switching link section 50, the position of the connecting shaft section 52 relative to the connecting rotation shaft 51 rotates downward from the sliding position.

[0064] As a result, since the upper end 42a of the suspension section 40 is connected to the connecting shaft section 52, the position of the upper end 42a changes with the rotational movement of the switching link section 50. The upper end 42a moves behind the sliding position. Accordingly, the inclined suspension section 40 rotates around the lower end 41b so that it approaches the vertical. Furthermore, as shown in Figure 14, when the link mechanism 70 deforms, the suspension section 40 rises around the lower end 41b so as to move closer to the vertical. At the same time, the upper link section 31 rotates around the lower end 31b in a direction in which the upper end 31a moves backward relative to the lower end 31b. Similarly, the lower link section 32 rotates around the lower end 32b in a direction in which the upper end 32a moves backward relative to the lower end 32b.

[0065] As a result, the support frame 20 moves upward and backward relative to the ski 2. At the same time, the rear end of the upper rear extension 21 lifts relative to the front end, and the lower end of the front overhang 22 moves backward relative to the upper end. Viewed in the Y direction, the L-shaped support frame 20 rotates in this direction, and the overall height of the support frame 20 rises relative to the ski 2. Furthermore, as shown in Figures 14 to 15, the deformation of the link mechanism 70 progresses. Along with this, the rotation of the switching link section 50, the tilting of the suspension section 40, the rotation of the upper link section 31 and the lower link section 32, and the positional movement and posture changes of the support frame 20 progress further.

[0066] The rotation of the switching link section 50 stops when the lower surface of the upper link section 31 contacts the upper end 32a of the lower link section 32. At this time, the suspension section 40 is standing almost perpendicular to the lower end 41b. In this state, the sit ski 1 is in the lift-use position, where it can be used to board the lift, as shown in Figure 16. In the lift-use position, unlike when skiing, no large load is applied, so the shock damping by the suspension section 40 is not performed to a great extent. In the lift-use position, the support frame 20 is positioned higher relative to the skis 2 compared to the skiing position. In the lift-use position, the rear end of the upper rear extension 21 is raised relative to the front end compared to the skiing position. Therefore, the upper rear extension 21 can be easily placed on the lift approaching from behind, allowing the skier to use the lift. When getting on or off the lift, the user distributes the load using pole members or the like at the lift usage position, slightly shifting the center of gravity upward. As a result, the rear end of the upper rear extension 21 lifts relative to the front end.

[0067] Thus, switching from the sliding position to the lift usage position is possible simply by the user, seated in chair section 3, using the pole member to shift their center of gravity upward. In other words, the user can switch from the sliding position to the lift usage position independently while seated in chair section 3, without requiring any assistance. In the lift operating position, the connecting shaft portion 52 and the upper end 41a are located behind the straight line extending the lower link portion 32 in the axial direction.

[0068] When switching from the lift usage position to the sliding position, the user shifts their center of gravity slightly downward. As a result, as shown in Figures 16 to 15, the upper end 32a of the lower link 32 and the lower surface of the upper link 31, which had been restricting the rotational movement of the switching link section 50, separate. Consequently, the switching link section 50 becomes rotatable around the connecting rotation shaft 51. Then, due to the reaction force from the suspension section 40 to the load applied by the user to the chair section 3, the switching link section 50 receives an upward force from the connecting shaft section 52. This also causes the switching link section 50 to rotate around the connecting rotation shaft 51, and the locked section 53 rises. When the lift is lowered, the outer circumference of the switching link section 50 comes into contact with the assembly shaft section 25 and stops. Furthermore, when the lift is in use, the connecting shaft portion 52 and the upper end 41a are positioned behind the straight line extending in the axial direction of the lower link portion 32, which allows for smooth lift-down without the joint becoming reversed.

[0069] When the user's load is almost completely distributed by the pole members, the rotation of the switching link section 50, the tilting and rotation of the suspension section 40, the rotation of the upper link section 31 and the lower link section 32, and the descent of the upper rear extension section 21 cause the locked section 53 to reach the lockable position of the lock section 60. In this state, the operating handle 60a of the locking unit 60 is operated to lock it. Then, even if a large load is applied during sliding in the sliding position, the suspension unit 40 can dampen the impact. In this way, the user can switch from the lift usage position to the sliding position independently while seated in the chair unit 3, without requiring any assistance.

[0070] In this embodiment, the sit-ski 1 can switch between the lift usage position and the skiing position by rotating the switching link section 50, eliminating the need to provide a mechanism on the support frame 20 to change the support position of the suspension section 40. This allows for space-saving of the mechanism and improved layout flexibility. At the same time, since no direct play occurs at the support position of the suspension section 40 relative to the support frame 20, the degree of play in the support of the suspension section 40 can be suppressed to one-tenth. As a result, the movement of the support frame can respond linearly to the skis 2 in response to input from the user during competition, eliminating any delay in input transmission due to play. Therefore, the performance level of the sit-ski 1 can be improved.

[0071] The switching link section 50 is supported by the support frame 20 in the sliding position at two points: the connecting rotating shaft 51 and the locked section 53, both located on either side of the load direction of the suspension section 40. This allows for stress distribution. Furthermore, the diameter of each shaft can be reduced, thus saving space. Here, the diameter of the connecting shaft section 52 > the diameter of the connecting rotating shaft 51 and the diameter of the locked section 53.

[0072] In the lift-operated position, the lower surface of the upper link section 31 contacts the upper end 32a of the lower link section 32, thereby restricting the rotational movement of the switching link section 50. This reduces the impact that occurs when switching from the lift-operated position to the ski-operated position. Furthermore, it allows for a smoother transition between the lift-operated position and the ski-operated position.

[0073] By dividing the shoe section 11 into front and rear halves, making it rotatable by the shoe shaft section 11c, and further restricting its position with the shoe connection section 11d, it is possible to avoid hindering the movement of the ski 2 as it tries to flex. This makes it possible to reduce the rigidity of the shoe section 11 and improve turning performance. At the same time, because the shoe section 11 is configured as a triangular link, its movement can be suppressed, preventing the shoe section 11 from detaching from the binding section 5 due to unintended movement, thereby improving safety.

[0074] By employing spherical bearings SB in the upper link section 31 and the lower link section 32, deflection of the components can be tolerated. As a result, the link mechanism 70 is not restricted in its movement relative to the support frame 20 to a two-dimensional plane in the direction of travel and vertical direction, i.e., movement in the ZX plane. Furthermore, since the link mechanism 70 is allowed to rotate in the X direction in addition to the two axial directions of the Z and X axes relative to the support frame 20, it becomes possible to increase the tuning range due to the rigidity of the components and improve controllability.

[0075] By employing a length adjustment mechanism 80 in the upper link section 31 and the lower link section 32, the tuning range can be increased. The length adjustment mechanism 80 can be set up even in a split-type configuration where the upper link section 31 and the lower link section 32 are made of parts of different lengths, enabling seamless length adjustment. This expands the range of change for the damping ratio, that is, the value obtained by dividing the amount of movement of the support frame 20 by the stroke of the suspension section 40.

[0076] By employing hollow dowel pins at the connection points between the support frame 20 and the upper link section 31 and / or lower link section 32, the system can be partially disassembled with bolts inserted into the hollow sections, allowing for maintenance even on snow. By employing pins to prevent rotation on each shaft, it is no longer necessary to hold tools with both hands, improving maintainability in the field, specifically on snow. Furthermore, connections using pins P and hollow dowel pins B can be employed at each connection or fastening point as needed.

[0077] Furthermore, in the present invention, it is also possible to individually select and combine the various components of the embodiments described above. [Explanation of Symbols]

[0078] 1… Sit-ski 2…Ski 3…Chair section 4...Leg support part 5…Binding section 10...Buffer mechanism 11...Shoe Club 11a... Former Shoe Club 11b... Rear Shoe Club 11c...Shoe shaft part 11d... Shoe connection part 20…Support frame 20a, 20b… L-shaped flange 21… Upper posterior extension 22…Lower part of the front apron 25…Assembly shaft 26...cover 27…Connecting member 31… Upper link section 31a…Top end 31b…lower end 32... Link section below 32a…Top end 32b…lower end 40…Suspension section 41...Cylinder 41b…lower end 42... Suspension shaft 42a…Top end 50... Switching link section 60... Rock Club 70... Link mechanism 80...Length adjustment mechanism

Claims

1. A sit ski having a suspension mechanism, Skis and The chair part where the user sits, A cushioning mechanism that supports the chair portion on the ski board in a way that can absorb impact, The binding portion for attaching the cushioning mechanism to the ski board, It has, The aforementioned buffering mechanism is The shoe portion is attached to the ski by the binding portion, A support frame that supports the chair section from below, A rotatable upper link portion, the upper end of which is connected near the front end of the support frame and the lower end of which is connected to the rear position of the shoe portion, A rotatable lower link portion, the upper end of which is connected to a position lower on the support frame than the connection position of the upper end of the upper link portion, and the lower end of which is connected to a position lower in front of the shoe portion than the connection position of the lower end of the upper link portion, A retractable suspension part whose lower end is rotatably connected to the shoe part, A switching link section is rotatably connected to the support frame at a position rearward from the connection position of the upper end of the upper link, and the upper end of the suspension section is rotatably connected at a position away from the connection position of the support frame, A locking mechanism that can switch between a locked state and an unlocked state of the rotational position of the switching link part relative to the support frame during buffering in the sliding position and during the upward lifting of the rear end of the support frame in the lift usage position, respectively. Equipped with, The locking mechanism allows the switching link to be locked in the sliding position, with the connection position of the upper end of the suspension section set to a position rearward and upward compared to the connection position of the upper end of the upper link, and allows the switching link to be unlocked in the lift usage position, with the connection position of the upper end of the suspension section set to a position lower than the connection position of the upper end of the upper link. The upper link portion, the lower link portion, the support frame, and the shoe portion form a rectangular link mechanism. The support frame is formed by assembling two L-shaped flanges that are spaced apart and symmetrically opposite each other with respect to a vertical central plane (median plane) in the lateral direction, via a plurality of assembly shafts that extend laterally. The switching link sections are positioned close to the opposing inner surfaces of the two L-shaped flanges, The two switching link sections are rotatably connected as a single unit by a connecting shaft extending laterally, the connecting shaft is positioned near the midpoint between the connection position of the switching link section to the support frame and the locking position by the locking section when viewed laterally, and the upper end of the suspension section is rotatably connected to the lateral center of the connecting shaft. The upper link portion and the lower link portion are connected at their upper ends to the lateral outward direction of the L-shaped flange, A sit ski characterized by its features.

2. The shoe portion has a front shoe portion and a rear shoe portion, which are divided into front and rear sections. The front shoe portion and the rear shoe portion are rotatably connected by a shoe shaft portion that extends laterally, and the front shoe portion and the rear shoe portion are connected to each other by a shoe connecting portion that extends in the front-rear direction below the shoe shaft portion and is slightly expandable and contractible. The lower end of the upper link portion is connected to the rear shoe portion. The lower end of the suspension portion is connected to the front shoe portion, The shoe shaft portion, when viewed from the side, coincides with the connection position of the lower end of the lower link portion. The sit ski according to feature 1.

3. The upper link portion and the lower link portion are connected to the support frame and the shoe portion by a spherical bearing at least one of their upper and lower ends. The sit ski according to feature 1.

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