JP2019147053A - skateboard - Google Patents

Abstract

To achieve preferable turning steering property of a skateboard having four wheels, in which two wheels are provided on a front side and on a rear side.SOLUTION: A board 11 has a front side truck 14 and a rear side truck 15. The front side truck 14 and the rear side truck 15 are configured so that, a hanger 24 is attached to a base plate 21 through a king pin 22 and bushes 25, 26. The front side truck 14 is configured so that, the base plate 21 is rotatable around a shaft center 18 inclined to a front upper side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a skateboard.

  As a type of skateboard, a front board and a rear board are provided, and the front board and the rear board are elastically twisted in opposite directions around the longitudinal axis by the operator's weight and leg strength. There exists what was comprised so that it could twist and deform | transform (patent document 1). In the skateboard described in Patent Document 1, casters having rollers are attached to the bottom surface of the front board and the bottom surface of the rear board, respectively, and the casters are oblique to the vertical axis in a side view. The head is configured to swing around a shaft center inclined forward. As a result, the turning steerability is good, and it is possible to travel on, for example, a waveform path, that is, a plurality of continuous S-shaped paths.

  However, in the skateboard described in Patent Document 1, both the front and rear caster rollers are a single wheel. For this reason, the casters of the front and rear wheels swing their heads around an axis that is inclined obliquely forward with respect to the vertical axis when viewed from the side. The front and back boards cannot be held horizontally.

  For this reason, the stability at the start of traveling is not good, and skill is required for the operation from the stop state to the stable traveling state.

  In order to eliminate this instability, it is considered that both the front side and the rear side should be two wheels, that is, a total of four wheels.

JP 2005-537820 Gazette

  However, when the front two wheels and the rear two wheels are used, the resistance from the road surface when the caster swings the head is large, and thus it becomes difficult to make a stable turn during traveling, which is as good as when the front and rear wheels are one by one It becomes difficult to exhibit a good steering performance.

  SUMMARY OF THE INVENTION Accordingly, the present invention aims to solve such problems and improve the turning steering performance of a skateboard having two wheels, that is, a total of four wheels on both the front side and the rear side.

In order to achieve this object, the skateboard of the present invention
The board has a front track and a rear track,
The front track and the rear track have a hanger attached to the base plate via a kingpin and a bush,
The front track is configured such that the base plate is rotatable around a first axis that is inclined forwardly upward.

  In such a configuration, since both the front and rear tracks have hangers, the left and right wheels are equipped using the hangers, and therefore the front and rear four wheels are provided. In addition, it is excellent in stability during traveling, particularly stability at the start of traveling. In addition, since the hanger is attached to the base plate using an elastic bush, the spring action can be exerted on the road surface side than the base plate, so the board is attached to the road surface on which the wheels are grounded. It can be displaced flexibly. At this time, in the skateboard of the present invention, since the base plate can freely rotate around the first axis that is inclined forwardly upward, the operator can set the axial center in the front-rear direction to the front part of the board by weight or leg strength. By giving the surrounding displacement, it is possible to generate a good steering force on the front wheel supported by the hanger or to generate a forward driving force on the front wheel. By the action, the board can be displaced flexibly and smoothly. For this reason, although it is a four-wheel skateboard, the turning operability can be made particularly good.

It is a three-dimensional view of the skateboard of Embodiment 1 of the present invention. It is a side view of the whole skateboard. It is an enlarged side view of the front track of the skateboard. It is an enlarged side view of the rear track of the skateboard. It is a top view of the whole skateboard. It is a bottom view of the whole skateboard. It is an enlarged three-dimensional view of the front side track of the skateboard. It is a bottom view of the skateboard of Embodiment 2 of this invention. It is an enlarged three-dimensional view of the rear track of the skateboard. It is a bottom view of the skateboard of Embodiment 3 of this invention. It is an enlarged three-dimensional view of the front side track of the skateboard. It is an expanded sectional view of the front side track of the skateboard.

(Embodiment 1)
1 to 7 show a skateboard according to Embodiment 1 of the present invention. Here, 11 is a board, which is formed of resin or the like. The board 11 has a configuration in which a front side portion 12 and a rear side portion 13 are connected to each other in the front-rear direction, and the front side portion 12 and the rear side portion 13 are arranged in the front-rear direction depending on the weight and leg strength of an operator riding on the board 11. It is configured to be elastically twisted and deformed in opposite directions around the heart. Such a board 11 itself is described in Design Registration No. 1376897 and other documents, and is well known to those skilled in the art, and therefore, detailed description of its structure is omitted.

  A front track 14 is mounted on the lower surface of the front portion 12, and a rear track 15 is mounted on the lower surface of the rear portion 13. In the front and rear tracks 14 and 15, 16 and 17 are thrust bearings, and these thrust bearings 16 and 17 are all rotatable around axial centers 18 and 19 inclined upward. That is, the shaft centers 18 and 19 are provided in an inclined state so that the upper side is positioned in front of the lower side.

  In the front track 14 and the rear track 15, base plates 21 and 21 are attached below the thrust bearings 16 and 17. That is, the base plates 21 and 21 are rotatably supported around the shaft centers 18 and 19 by the thrust bearings 16 and 17. The base plate 21 has the same configuration as that widely used for ordinary skateboards having a plate-like board and four wheels.

  A hanger 24 is attached to each base plate 21 by a king pin 22 and a king pin nut 23. Bushes 25 and 26 are mounted between the hanger 24 and the base plate 21 and between the hanger 24 and the king nut 23, respectively. The bushing 25, 26 has a king pin 22 passing through the inside thereof. The bushes 25 and 26 are made of an elastic body having spring elasticity, such as synthetic rubber, and are provided so as to elastically support the hanger 24 with respect to the base plate 21. The hanger 24 is provided with an axle 27, and left and right wheels 28, 28 are attached using the axle 27. The hanger 24 is provided with a pivot 29. The pivot 29 is fitted into the pivot cup 30 of the base plate 21 via a pivot bush (not shown).

  The illustrated king pin 22, king pin nut 23, hanger 24, bushes 25 and 26, axle 27, wheel 28, pivot 29, pivot cup 30, and pivot bush (not shown) are all similar to the base plate 21. The configuration is the same as that widely used for ordinary skateboards having a plate-like board and four wheels.

  In the illustrated example, the hanger 24 is attached to the base plate 21 by a king pin 22.

  In the illustrated skateboard, the rotational resistance around the axis 19 of the rear track 15 is configured to be greater than the rotational resistance around the axis 18 of the front track 14. Specifically, in the front track 14, the base plate 21, the hanger 24, and other members are supported by the thrust bearing 16 so as to freely rotate around the axis 18. On the other hand, the rear track 15 is provided with a restoring spring 32 for restoring the base plate 21 and other members to a neutral position, that is, a position that does not swing left and right. The restoring spring 32 is constituted by a pair of tension coil springs 33, 33, and one end thereof is connected to the center of the boat 11 at a position spaced from the base plate 21. The other ends of the tension coil springs 33 and 33 are respectively connected at positions spaced from the center of the base plate 21 in the right and left directions. Accordingly, the pair of tension coil springs 33 and 33 are arranged in a V shape centering on the one end, and when the base plate 21 or other members swing their heads in the right direction or the left direction, The above-mentioned restoring force is expressed by elongation occurring in one of them. Moreover, it is possible to prevent the rear side track 15 from rotating more than necessary by such a configuration having resilience. Although illustration is omitted, the front track 14 is preferably provided with a stopper that prevents the front track 14 from rotating excessively.

  According to such a configuration, when the operator rides on the board 11 and tilts the board 11 in either the left or right direction by weight or leg strength, the tracks 14 and 15 are rotated around the axial centers 18 and 19 inclined upward. Since it is configured to rotate, it turns rightward or leftward according to the inclination of the board 11. This allows the operator to steer the board 11, especially with the front track 14. Further, when the front portion 12 of the board 11 is inclined to one of the left and right directions and the rear portion 13 is inclined to the other of the left and right directions, that is, the front portion 12 and the rear portion 13 are opposite to each other. If the elastic deformation of the board 11 so as to be twisted is repeated, a propulsive force can be generated in the wheel 28.

  At this time, since the bushes 25 and 26 are provided on both the front and rear tracks 14 and 15, the spring action can be exerted on the road surface side with respect to the base plate 21. Can be displaced. That is, the operator can displace the board 11 flexibly and smoothly by the spring action when the board 11 is swung or propelled. Therefore, according to the skateboard of the first embodiment, since it has a configuration including the front and rear four wheels, it not only has excellent stability during traveling, particularly stability at the start of traveling, but also its turning operability and propulsion operability. Can be made particularly good.

  If the configuration without the bushes 25 and 26, for example, the configuration in which the axle 27 is directly attached to the base plate 21, the turning operation and the propulsion operation can be similarly realized. Then, since two wheels are provided at a distance from each other on the left and right, the resistance from the road surface when turning to the road surface is correspondingly larger than that of a single wheel.

  According to the first embodiment, since the restoring force to the neutral position is applied to the rear track 15 as described above, the steering performance is mainly borne by the front track 14. This has the same configuration as a bicycle having a steering wheel only on the front side, and therefore places importance on running stability, and can be steered only by operating the front track 14, so that the ease of steering can be achieved. .

  On the other hand, in the first embodiment, the configuration without the restoring spring 32, that is, the configuration in which the rear track 15 is also rotatable around the axis 19 similarly to the front track 14, in other words, the rear track 15 A configuration in which the rotational resistance around the axis 19 is reduced similarly to the front track 14 can also be adopted. In this case, since the front and rear tracks 14 and 15 are both rotatable around the shaft centers 18 and 19, the steering performance can be further improved. For example, the board 11 can be compared with the case where the restoring spring 32 is provided. The turning radius when traveling can be reduced. In other words, it can be a small skateboard. Similarly, the generation of additional thrust during travel can be achieved more easily.

  In the illustrated example, the board 11 has the same configuration as that described in the Design Registration No. 1376897 as described above. However, the form of the boat 11 is not limited to this, and for example, a configuration described in Patent Document 1 may be employed. In addition, the specific configuration shown in the figure has been described for the front and rear tracks 14 and 15, but the configuration is not limited to this, and is widely used for ordinary skateboards having a plate-like board and four wheels. The base plate 21, the hanger 24, and the bushes 25 and 26 having the same configuration as that used can be used as appropriate. Further, in the illustrated example, the bushes 25 and 26 have the same configuration as that widely used for a normal skateboard having a plate-like board and four wheels as described above, but is not limited thereto. Instead, appropriate members having spring elasticity can be used as the bushes 25 and 26. Further, in the example shown in the figure, a pair of bushes 25 and 26 are arranged on the upper and lower sides similar to those widely used for a normal skateboard having a plate-like board and four wheels. It is not limited to this, The quantity and form can be made appropriate. In short, a configuration in which a member having spring elasticity is attached using the king pin 22 between the base plate 21 attached to the thrust bearings 16 and 17 and the hanger 24 is sufficient. As the king pin 22, an appropriate one can be used instead of the illustrated configuration.

(Embodiment 2)
8 and 9 show a skateboard according to Embodiment 2 of the present invention. In the second embodiment, the hanger 24 is directly attached to the board 11 by the king pin 22 in the rear track 15 without using the base plate 21 or the thrust bearing 17. Although illustration is omitted, the boat 11 is provided with metal fittings and other members for screwing the king pins 22. The upper bush 25 is provided between the hanger 24 and the seat plate 31, and the lower bush 26 is provided between the hanger 24 and the kingpin nut 23.

  With this configuration, the hanger 24 attached directly to the board 11 can rotate around the axis 19, but the magnitude of the rotational resistance is adjusted by the tightening degree of the kingpin nut 23. For this reason, the rotational resistance of the rear track 15 can be easily adjusted. Further, since the base plate and the thrust bearing are not provided, the structure is simple accordingly.

  The skate boat according to the second embodiment is not limited to the illustrated example as with the skateboard according to the first embodiment described above, and various deformation structures similar to those described above may be employed.

(Embodiment 3)
10 to 12 show a skateboard according to Embodiment 3 of the present invention. In this skateboard, the board 11 is composed of a plate-like body as shown in the figure, and the front part 12 and the rear part 13 of the board 11 are arranged in the front-rear direction depending on the weight and leg strength of the operator. The shaft is configured to have such a rigidity that it cannot be elastically twisted and deformed in opposite directions around the shaft center.

  The structure of the front track 14 is as follows. That is, a “<”-shaped plate-like bracket 35 is attached to the lower surface of the front portion 12 of the board 11, and the front half portion 36 of the bracket 35 is gradually positioned at a lower position as it goes to the front side of the board 11. It is inclined to become. That is, the front half part 36 is formed so that the plate surface 37 is obliquely rearward and downward.

  In the third embodiment, a thrust bearing 16 as a support that rotatably supports the base plate 21 of the front track 14 is attached to the front half 36 of the bracket 35 with bolts 38 and nuts 39. A first synthetic rubber plate 40 is sandwiched between the thrust bearing 16 and the bracket 35 as an elastic body having spring elasticity, and is integrally attached thereto. Further, a second synthetic rubber plate 42 is sandwiched between the washer 41 on the nut 39 side and the bracket 35 as an elastic body having spring elasticity, and is attached integrally therewith. That is, the thrust bearing 16 as a support is attached to the bracket 35 in a state where the bracket 35 is sandwiched between the first synthetic rubber plate 40 and the second synthetic rubber plate 42. As described above, the bracket 35 is formed such that the plate surface 37 of the front half 36 is obliquely rearwardly downward. Therefore, the axial center 18 of the thrust bearing 16 attached to the front half 36 is Similar to Embodiments 1 and 2, the structure is inclined forward.

  In the front track 14, the base plate 21, the hanger 24, the bushes 25 and 26, the king pin 22, the king pin nut 23 and the like have the same configuration as that of the first and second embodiments. These are also provided in the rear track 15. In the rear track 15, the base plate 21 is directly attached to the board 11. The mounting structure is the same as that widely used in ordinary skateboards having a plate-like board and four wheels. Therefore, detailed illustration thereof is omitted.

  In the skateboard according to the third embodiment, when the operator rides on the board 11 and tilts the entire board 11 in either the left or right direction by weight or leg strength, the front track 14 is rotated around the axis 18 tilted forward. Therefore, it turns rightward or leftward according to the inclination of the board 11. As a result, the operator can steer the board 11 and cause the board 11 to develop a propulsive force. The rear track 15 does not have a thrust bearing and therefore does not have such a turning function. However, since the bushes 25 and 26 are provided, the rear portion 13 of the boat 11 can be inclined without difficulty in a narrow range.

  As described above, the skateboard according to the third embodiment has higher rigidity of the board 11 than the first and second embodiments, and the front portion 12 and the rear portion 13 are arranged in the front-rear direction depending on the weight and leg strength of the operator. It does not mean that the core is elastically twisted and deformed in opposite directions around each other. However, since not only the bushes 25 and 26 but also the first and second synthetic rubber plates 40 and 42 having spring elasticity are provided between the board 11 and the hanger 24, the rigidity of the board 11 is high. Nevertheless, the operator can flexibly and smoothly displace the board 11 when turning or propelling the board 11 as in the case of the first and second embodiments. Therefore, the skateboard of the third embodiment also has a configuration including four front and rear wheels, so that it not only has excellent stability during traveling, particularly stability at the start of traveling, but also propulsion operability, particularly turning operability. Can be made particularly good. Moreover, since the rigidity of the board 11 is high, the operator can get on the board 11 in a stable state.

  In other words, in the skateboard of the third embodiment, the rigidity of the board 11 is higher than that of the skateboards of the first and second embodiments, and the turning operability of the front truck 14 is particularly improved by inclining the board 11 correspondingly. Although it tends to be lower, it can be said that this tendency is compensated by the first and second synthetic rubber plates 40 and 42 having spring elasticity.

  For this reason, the spring elasticity of the first and second synthetic rubber plates 40 and 42 contributes to the steerability and propulsive force generation of the front track 14 in particular by inclining the board 11 around the front and rear axes. It is preferable that it is a thing of a grade. From this viewpoint, it is preferable that the lower first synthetic rubber plate 40 is formed thicker than the upper second synthetic rubber plate 42 as shown in the drawing. Moreover, it is preferable that the lower first synthetic rubber plate 40 is formed to have a larger dimension in the surface direction than the upper second synthetic rubber plate 42. Specifically, it is preferable to be formed in a large diameter. Moreover, since the board 11 inclines in the left-right direction, it is preferable that the lower first synthetic rubber plate 40 has a shape in which the dimension in the left-right direction is larger than that in the front-rear direction. Examples of such a shape include an ellipse and a rectangle. In the accompanying drawings, the elastic body, that is, the one using two synthetic rubber plates is illustrated, but the quantity can be set as appropriate.

11 Board 14 Front track 15 Rear track 16 Thrust bearing 17 Thrust bearing 18 Axis 19 Axis 21 Base plate 22 King pin 24 Hanger 25 Bush 26 Bush 40 First synthetic rubber plate 42 Second synthetic rubber plate

Claims (4)

A skateboard comprising a front track and a rear track,
Each of the front track and the rear track includes a base plate, a hanger, a king pin for attaching the hanger to the base plate, and a bush having spring elasticity,
The base plate of the front track is rotatable around a first axis inclined forwardly upward;
The skateboard characterized in that an axis of the kingpin of the front track is inclined upward. The base plate of the rear track is rotatable about a second axis inclined forwardly upward;
The skateboard according to claim 1, wherein an axis of the kingpin of the rear track is inclined upward.   A board having a front portion and a rear portion is provided, and the front portion and the rear portion are elastically twisted and deformed in opposite directions around the axial center in the front-rear direction by the weight and leg force of the operator. The skateboard according to claim 1 or 2, wherein the skateboard is configured to be able to. A board having a front portion and a rear portion is provided, and the front portion and the rear portion are elastically twisted in opposite directions around the axial center in the front-rear direction depending on the weight and leg strength of the operator. The skateboard according to claim 1, wherein the skateboard is configured not to be deformed.