JPH04132577A - Skate board - Google Patents

Abstract

PURPOSE: To advance at high speed over a flat face or an inclined face by constituting a skateboard of a pivot device formed so as to move wheels by a quantity corresponding to a movement of footboards. CONSTITUTION: A skateboard has two footboards 10 and 12 and a spacer 14 which is pivotally fixed to the footboards in an end part and separately holds the two footboards. The footboards 10 and 12 rotate with the axis A of a pivot pin 30 as the center in an angle range limited by a vertical edge part 51 of a slot 28 of a set wheel main body 16. A set wheel 52' is respectively composed of separate upper and lower parts 60 and 62 and an annular torsional member 64 formed of rubber and its other elastic material. Lower parts 62 of respective set wheels have a ring part formed so that a ball joint 66 is joined to the set wheel outside end by airtightly surrounding the torsional member 64. A pivot bolt 68 is screw-fitted to and locked on the set wheel upper part 60 by penetrating through a strap 56 and an inside hole of the torsional member 64.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to skateboards.

[Conventional technology]

Conventional skateboards consist of two spaced apart sets of wheels such that the wheels are aligned on a truck, and a substantially rigid board that supports the truck.

On more advanced boards, the axle of each set of wheels has an offset suspension system that greatly reduces steerability, forcing the skater to shift his/her foot and body position on the board. By operating the wheel, the center of gravity of the body weight is used to change the degree of contact between the axle on the set of wheels and the road surface.

U.S. Patent Nos. 3,771,811 and 4,202
, No. 559 discloses that by fixing one set of wheels to the underside of a board and attaching the other to a rotatable stand at the other end of the board, the stand and set of wheels can be steered together with the feet of five passengers. The one-car board with a steering stand attached to it is for children or beginners.
The boat can be easily steered with nine feet without having to shift your body position on the board.

[Problem to be solved by the invention]

These conventional vehicles are still insufficient in terms of steerability and maneuverability.

An object of the present invention is to provide a skateboard that has superior maneuverability and maneuverability compared to conventional boards.

[Means to solve the problem]

A skateboard according to the present invention includes two treadboards each comprising a treadboard and a pair of wheels each having a treadmill and two wheels fixed to the underside of the pedestal in an axially aligned manner, a spacer for holding the treadboards apart, and a spacer for holding the treadboards apart; It consists of a pivot device having a vertical pivot axis that connects the tread plate to the spacer so that both tread plates can rotate once relative to the spacer.

Furthermore, according to the present invention, each set of wheels is provided with elastic suspension means for elastically axially moving the step by a limited amount in a direction perpendicular to the rotational axis direction of the wheels.

According to one form of the present invention, each set of wheels is fixed to the wheel body, both sides of the body, and protrudes from both sides, so that
an axle configured to rotatably support an axle; a first axle attached to the wheel body so that its axis is perpendicular;
The pivot pin, the support member attached to the pivot pin, and its pivot axis are perpendicular to the axle axis;
a second pivot pin for pivotally attaching the step to the support member; an elastic suspension means for horizontally holding the step, located between the support member and the lower side of the step; and a spacer, located between the wheel body and the support member; A pivot device is included in pivotal engagement with the first pivot pin.

The wheel body and support member of each set of wheels are integrated, and the support member pivot device is connected to the support member pivot device through the slot of the set of wheels.
Preferably, the assembly wheel is adapted to engage the first pivot pin of each assembly shaft.

According to the present invention, contact between the wheel and the spacer is prevented by providing the slot with a longitudinal edge facing toward the center and stopping the rotation of the spacer pivot device about the first pivot pin. The pivot devices each ride on the horizontal plane of the slot in the wheel assembly body.
A rotation bearing is provided to prevent the pivot device from being coupled to the assembled wheel body when the treadle pivots relative to the support element.

It is best to attach a strap to the step stool.

〔Example〕

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

The skateboard shown in FIGS. 1 and 2 includes two treadboards (10) and (12), and a spacer pivotally connected to the treadboards at the ends to hold the two treadboards apart as shown. (14).

As shown more clearly in FIGS. 3 and 4, each tread consists of a wheel set body (16) and a step stool (18).

Each set of wheel bodies has bosses (22) protruding from both sides of the body.
two stub axles (20) screwed onto the stub axle (20), an axle (24) made of fairly hard elastic material and rotatably mounted on the short axle (20), an upper section generally indicated by (26); Support device, sector slot (28) (more clearly shown in Figures 4 and 5), first pivot pin (30)
, an elastic suspension pad (32), and a second pivot pin (34) that pivots the step stool (18) to the support device ff1 (26).
).

The suspension pad (32), as shown in FIG. A groove is cut between the wings on the top surface so that a pivot pin (34) can be fitted therein.

Support equipment! (26) have two upturned gable lugs (36) with holes for the pivot pins (34) and, in use,
It has a rectangular recess (not shown) into which the suspension pad base fits.

The spacer (14) consists of an elongated frame member (37) supporting pivot arms (38) at both ends. The frame member is made of a suitably rigid and sturdy material such as reinforced plastic or aluminum.

Each pivot arm (38) has an appropriate bushing (42).
A pivot lug (40) that supports the roller bearing (44),
and a spigot (46) that presses into a bore at the end of the frame member (37).

The locking pin (48) passes through the spigot (46) and the frame member (37) and holds the pivot arm so that it does not rotate or fall out of the white piece into which it is fitted.

As shown in FIG.
It is stepped (50) outward by a dimension that allows for an airtight fit.

To assemble the skateboard, use the pivot arm lugs (
40) into the slot (28) of the assembled wheel body.

Pass the pivot pin (30) from the underside of the main body into the bush (42) of the lug (40), and connect the support device! (26) is locked to the main body by a locking nut (52) located in a recess at the base of the suspension pad.

The suspension pad (32) is placed in the recess on the upper surface of the support device (26), and the step is strongly pressed elastically against the suspension pad wing (35) to resist the deflection of the pad material and deform the wing downward. By doing so, the lug (54) hole on the lower side of the step stool and the support device cutout lug (36) hole are aligned.

The pivot pin (34) is then pushed through the holes in the gable lug (36) and the step lug (54) and locked in place by a resilient lock washer, as shown in FIG.

Thereby, the pivot pin is fixed to the upper surface of the suspension pad, fixing the suspension pad to the set wheel. The wings (35) of the suspension pad are biased upward at the bottom of the step to hold the step horizontally, while also allowing the step to pivot elastically by a limited amount around the pin (34) pivot axis. It can be so.

From the above description, it can be seen that the steps (10) and (12) are aligned with the axis of the pivot bin (30) (
It can be seen that it rotates around A).

The chain line (B) in FIGS. 1 and 5 indicates the slot (28).
The longitudinal lateral line indicates the limiting position of the rotational angle of the support element relative to the footplate in contact with the side of the pivot arm lug (40).

In the limited rotational position of the tread, the wheel (24) is just out of contact with the spacer element (37), as shown on the left side of FIG.

The skateboard shown in FIG. 6, like the skateboard of the above embodiment, has two tread boards (10') (12"),
and a spacer (14), although in this embodiment the step platform (18) is supported by a substantially conventional skateboard set of wheels (52').

The spacer (14) of this example is between two metal straps (56) and the said strut (56).

A spacer (
58).

The assembled wheels (52') are separated from each other by upper and lower parts (60) (
62), and an annular torsion member (64) made of rubber or other elastic material.
2) includes a ring portion that airtightly surrounds the torsion member (64) and connects the outer ends of the wheel assembly with a ball joint (66).

The pivot bolt (68) passes through the circular hole in the strump (56) and the torsion member (64), and passes through the circular hole in the strump (56) and the torsion member (64).
0). Therefore, in this embodiment, the treadle rotates relative to the spacer element about the axis (A) of the pivot bin.

The lower part of the assembled wheel (62) is connected to the ball joint (66) at the other end of the assembled wheel.
) to maintain the tilting motion of the step stool and lower one set of wheels (62).
The torsion member (64
) allows the platform (18) to pivot elastically at right angles to the spacer (14).

The step (18) of the skateboard according to the invention can be provided with a foot strap fixed to said step and running across the top of the board at right angles to the axle. The top surface of each step is preferably provided with an anti-slip surface material (90).

The skateboard according to the present invention is mainly used as a fast-moving vehicle for competitions, and the rider places his or her feet on a step stool and points his or her feet in the direction of the set wheel axle while the board is operating. By standing with your feet on the board and steering or turning with your feet spread outward to rotate the 1M boards (10) and (12) around the pivot axis (A), each set of wheels is aligned with the axle axis. The intersection of the lines that align with follows a common curved trunk around its center.

In this case, the radius of the curve is determined by the degree of outward spread of the tread. However, since the skateboard according to the present invention equipped with an elastic suspension member has a high performance, the rider can place his or her feet on the treadles (10) and (12) like a conventional skateboard equipped with non-steerable wheels. Turns can also be made by holding parallel, shifting your weight on the board, and tilting the board.

However, optimal turns are achieved by tilting the tread against the deflection of the pad (32) by simultaneously turning the tread about its longitudinal pivot axis (A) and shifting body weight onto the board. be exposed.

With the board of the present invention, for high-speed sharp turns, the rider faces toward the inside of the turn, approximately 45 degrees.

Tilt forward or backward! The g41ii tilts to the maximum extent to counteract the centrifugal force generated during a turn.The rider's feet and treadle then splay inward or outward, depending on whether the rider is leaning forward or backward. 9 Effects of the Invention The maneuverability of the boat of the invention is superior to conventional skateboards with non-steering wheels, where the board's wheel trajectory changes only slightly; It's clearly a lot more expensive than a board that only has the steering ability of Kumiguruma-kan.

If we ignore wheel slippage, in a board where only one set of wheels has steering ability, the turning radius is the confluence of the lines on the axes of the two sets of wheels. This merging point allows the fixed set of wheels to rotate, and rotates in the direction opposite to the rotation of the steerable first set of wheels (thereby, the AC point on the axle line approaches the -layer boat). The rotation brings the board much closer and allows the turning radius of the board to be reduced, as is the case with the boat according to the invention.

Another major advantage of the present board over conventional boards with non-steerable wheel sets, or boards with only one set of wheels being steerable, is that while both road plates can be pivoted, the rider's weight By properly distributing the
This point allows it to follow a sharply sinusoidal trajectory, allowing it to move forward at fairly high speeds over flat or sloping surfaces.

[Brief explanation of drawings]

FIG. 1 is a partially cross-sectional plan view of a first embodiment of a skateboard according to the invention. FIG. 2 is a side view of the board shown in FIG. 1. FIG. 3 is an exploded perspective view of the skateboard shown in FIGS. 1 and 2, viewed from below one of the treads. FIG. 4 is a side sectional view showing the treadle shown in FIG. 3 in an assembled state. FIG. 5 is a partially sectional plan view of the treadle taken along line 5--5 in FIG. 4. FIG. 6 is a side view of a second embodiment of a skateboard according to the invention. (10) (10') (12) (12') Plate (16) Wheel assembly body (20) Short axle (24) Axle (28) Slot (32) Suspension pad (35) Wing part (37) Frame member (40) Pivot arm lug (42) Bush (46) Spigot (50) Stepped part (52) Locking nut (54) Lug member (58) Spacer (62) Lower part of assembled wheel (66) Ball joint (90) Non-slip Face material (A) Pivot bin axis (14) Spacer (18) Step stool (22) Boss (26) Upper support device (30) First pivot pin (34) Second pivot pin (36) Lug (38) Pivot arm (44 ) Roller bearing (48) Locking pin (51) Vertical edge (52') Conventional assembled wheel (56) Strap (60) Upper part of assembled wheel (64) Torsion member (68) Pivot bolt (B) Chain line

Claims (16)

[Claims] (1) Two treads (10) each consisting of a set of wheels (16) (52') supporting a tread (18) and two wheels (24) fixed in axial alignment on the outside of said tread
(12) and (10') (12'), the step board (10
) (12) and (10') (12'), a pivot longitudinal axis (A) connecting each tread plate (10) (12) to said spacer (14); Both treads (10) (12) and (10') (12')
with respect to the spacer (14), the pivot vertical axis (
By rotating the axis around A), the tread plate (
10) Pivot devices (30), (40), and (62), (68) capable of moving the wheel (24) by an amount corresponding to the movement of (12), (10'), and (12').
A skateboard characterized by consisting of. (2) The wheel set (16) (52') is connected to the wheel set (16) (52') installed inside the wheel set (16) (52'), respectively. (16)
(52') It is characterized by comprising elastic suspension members (32) and (64) configured to elastically rotate the step stool (18) by a limited amount perpendicular to the axis of rotation of the wheel (24). The skateboard according to claim (1). (3) Each includes a step stool (18) and said step step (1
8) two wheels (24) fixed in axial alignment on the underside;
Two treads (10) equipped with a set of wheels (16) that support the
(12), a spacer (14) that holds the tread plates (10) and (12) apart, and a pivot vertical shaft (A) that connects each of the tread plates (10) and (12) to the spacer (14).
, both of the tread plates (10) and (12) are comprised of pivot devices capable of pivoting with respect to the spacer (14), and each of the assembled wheels has a wheel main body (16).
), an axle (20) fixed to the main body (16) and protruding from both sides of the main body (16) so that the wheel (24) can pivot around the axle (20); , a first pivot pin (
30), a support device (26) provided on the main body (16);
), a second pivot pin (34) pivotally coupling the step platform (18) to the support device (26) and having a pivot axis perpendicular to the axis of the wheel; By being located between the lower side of the step stool (18) and holding the step step (18) horizontally,
The pivot arm (38) on the spacer (14)
A skateboard comprising elastic suspension means (32) adapted to rotatably engage the first pivot pin (30). (4) The wheel itself (16) of each wheel set (16) and the support device (26) are integrated, and the pivot arms (38) at both ends of the spacer are connected to the slots (
Skate according to claim 3, characterized in that the wheel set (16) is adapted to engage with the first pivot pin (30) of each set of wheels (16) via a pair of wheels (28). board. (5) The slot (28) of the set wheel (16) is provided with a longitudinal edge (51) arranged centerwardly, and the first pivot pin (
30) Spacer (14) and pivot arm (
5. The skateboard according to claim 4, wherein contact between the wheels (24) and the spacers (14) is prevented by stopping the rotation of the spacers (38). (6) The pivot arm (38) of the spacer (14)
By riding on the horizontal plane of the slot (28), the pivot arm (38) is coupled to the assembled wheel body (16) when the tread (10) (12) rotates relative to the spacer (14). 5. Skateboard according to claim 4, characterized in that it carries a rotational bearing (44) which prevents the rotation of the skateboard. (7) A skateboard according to any one of claims (1) to (6), characterized in that it includes a foot strap attached to the step stool (10) (12). (8) Spacer (14), two tread plates (10) (12)
and (10') (12'), each of the step plates (10) (1
2) and (10') (12')
16) (52), consisting of two wheels (24) connected to each of the wheel sets in an axially aligned manner;
2), respectively, with respect to the vertical axis (A), the treadle (
10) It is fixed to (12) and (10') (12'), and is rotatably coupled to the spacer (14) so that it can rotate about each vertical axis (A). A skateboard characterized by: (9) Consisting of elastic suspension means (32) (64), treadle (
10) (12) and (10') (12') are each elastically separated from the wheel (24) by a limited amount in a direction perpendicular to the axis of rotation of said wheel (24); 9. The skateboard according to claim 8, wherein the skateboard is elastically rotated. (10) Spacer (14), two tread plates (10) (12)
), a set of wheels (
16), comprising two wheels (24) coupled to each of the wheel sets (16) in an axially aligned manner, each of the wheel sets (16) being coupled to the spacer (14) in a rotatable manner; , configured to pivot about a generally vertical axis (A), and provided with elastic suspension means, the treads (10, 12) being elastically separated from the wheels (24), respectively. Accordingly, the wheel assembly (16) is configured to elastically rotate by a limited amount in a direction perpendicular to the rotational axis of the wheel (24), and each of the wheel sets (16) has a slot opening therein. (28), which is fixed to both sides of the main body (16) and protrudes from both sides, so that the axle (24)
), a first pivot pin (30) provided in said body (16) concentrically with said pivot longitudinal axis, and said spacer (1
4), protrudes from the spacer so as to pass through the wheel body slot (28), and receives the first pivot pin, and the wheel body (16) and treads (10) (12)
) comprises a pivot arm (38) having a vertical through hole which allows for pivoting. (11) The wheel body (16) has at its top a generally horizontal support device, the resilient suspension means comprising a rectangular base and two wings projecting from said base and extending upwardly and outwardly (
11. Skateboard according to claim 10, characterized in that the base comprises a support member (26). (12) The step stool (10) (12) includes two downwardly extending lug members (54) each having a through hole, and the wheel body includes two upwardly extending gable lugs (34) each having a through hole.
6), and a second pivot pin (34) that passes through a through hole in the gable lug (36) to allow the step platform (10) (12) to pivot relative to the wheel body (10). ) Claim (10)
The skateboard mentioned. (13) The base of the elastic suspension member is connected to the second pivot pin (3
13. The skateboard according to claim 12, further comprising a slot into which the skateboard 4) is fitted. (14) The wheel assembly slot (28) is connected to the pivot arm (
11. The skateboard according to claim 10, further comprising a vertical wall (51) that prevents contact between the wheel (24) and the spacer by abutting against the spacer. (15) a spacer (14) comprising two spaced apart straps (56), a suspension means (64) at each end of said spacer (14) extending between said straps and defining a through hole; The assembled wheel (52) includes an upper part (60) attached to a treadle, a lower part (62) having a ring part that airtightly surrounds the torsion member (64), and a lower part (62) having an elastic torsion member (64), a pivot bolt (68) passing through member (64) and anchored to one end of said top (60), said top (60) and bottom (62);
Claim (9) characterized in that it consists of a ball joint (66) comprising a ball member provided on one side of the upper part (60) and a socket provided on the other of the upper part (60) and the lower part (62).
) Skateboards listed. (16) Two treads (10
) (12) and (10') (12') and the spacer (
14), and the set wheels (16) and (52) are respectively rotatably coupled to the spacer (14), so that the tread plate (1) is rotated about the vertical axis (A).
0) (12) and (10') (12'), the spacer is configured to be able to rotate around a generally vertical axis (A) with respect to the spacer (14), and Said treadle (10), (12) and (10') (
12') are each elastically coupled to the wheel (24) such that the wheels (24) can rotate freely.
In contrast, a skateboard characterized in that it is configured to be able to rotate around each horizontal axis.