JP2003325725A - Roller skates - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide roller skates which have a quite different structure from that of existing ones and give an enhanced feel of speed. <P>SOLUTION: The roller skates have a set of shoes 3 each having a shoe main body part 7 and a sole part 9 and roller parts 5 provided for the shoes respectively. The roller part 5 has an axle part 17 extending obliquely to the inner lower side of the shoe main body part 7 and a wheel 51 provided rotatably on the axle part 17. The diameter of the wheel 51 is larger than the distance between the sole part 9 and the ground and the wheel 51 is provided obliquely from inside the shoe main body part 7 over to the lower side of the sole part 9 so that the ground point of the wheel 51 be located substantially at the center of the sole part 9. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to roller skates.

[0002]

2. Description of the Related Art Conventional roller skates have a shoe sole in which a plurality of rollers are arranged in a plane and are fixed to the sole of an athletic shoe. On the other hand, in recent years, in-line skates in which a plurality of rollers are arranged in a line in the front-back direction of the shoe sole have become mainstream. In roller skates that have been put into practical use, including in-line skates, all the rollers are located below the shoe sole, and the diameter of the rollers cannot be made too large in order to emphasize stability. Therefore, there is a limit to the speed, and there is a certain limit to how to play with it.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a roller skates having a feeling of speed by having a completely different structure from the conventionally existing roller skates and having wheels larger than the conventional ones. It is in.

[0004]

In order to achieve the above object, the roller skates according to claim 1 of the present application include a pair of shoes having a shoe main body portion and a shoe sole portion, and a roller portion provided on each shoe. The roller portion includes an axle portion that obliquely extends inward and downward from the inside of the shoe body portion, and front and rear wheels rotatably provided on the axle portion, and the diameter of the wheel is the sole and the ground. It is characterized in that the wheel is obliquely provided from the inside of the shoe main body to the bottom of the shoe bottom so that the ground contact point of the wheel is substantially in the center of the shoe bottom.

According to the present invention, a wheel having a larger diameter than that of the conventional roller skates can be adopted, so that the roller skates can be enjoyed at a high speed. Also, because the wheels are installed diagonally, you can experience a softer sliding feeling compared to conventional roller skates.

The invention according to claim 2 of the present application is the bowl-shaped or mortar-shaped wheel according to claim 1, wherein the shoe main body side of the wheel is formed in a concave shape and the opposite side thereof is formed in a convex shape. It is characterized by having a shape. According to the present invention, since the wheel can be attached so as to cover the part that protrudes inward of the shoe body, it is possible to position the grounding part of the wheel near the center of the shoe sole without tilting the wheel too much. Becomes

The invention according to claim 3 of the present application is, in claim 1 or 2, wherein the roller portion is fixed to the frame from the shoe main body portion to the shoe sole portion, and the axle-equipped fixing portion is provided to the frame. And the axle portion is formed to project from the axle-equipped fixing portion, and the axle portion has a screw hole having an internal thread formed on an inner peripheral surface thereof and a male thread formed on an outer peripheral surface thereof. A hub metal fitting is provided around the axle, and a plurality of balls can roll between the bearing surface formed on the axle fixed part and the bearing surface formed on the hub metal. A ball holding metal fitting is provided around the axle portion so as to overlap with the hub fitting by being screwed into a male screw on the outer peripheral surface of the axle fitting, and is formed on the opposite side of the bearing surface of the hub fitting. Other Bearin A plurality of balls are rotatably arranged between a surface and a bearing surface formed on the ball holding metal fitting, and a metal fitting fixing screw is screwed into the female screw of the screw-in hole of the axle portion to form the ball. The holding metal fitting is prevented from being detached and attached, and the wheel is fixed to the hub metal fitting. According to the present invention, the hub fitting can be rotated by the ball bearing action, and the wheels can be rotated accordingly.

Further, in the invention according to claim 4 of the present application, in claim 3, a metal fitting contact portion is formed on the metal fitting fixing screw, and the metal fitting contact portion abuts on an end surface of the ball holding metal fitting. It is characterized in that the ball holding metal fitting is prevented from being attached or detached. According to the present invention, the metal fitting abutment portion abuts the end surface of the ball holding metal fitting to prevent the ball holding metal fitting from being detached during the process in which the metal fitting fixing screw is screwed into the screw-in hole of the axle.

In the invention according to claim 5 of the present application, in claim 3, a plurality of slits are formed on the outer end side of the screw-in hole of the axle portion to form an expandable expansion end. The screw-in hole is provided with a threaded portion and a diameter-increasing portion that is formed on the opposite end side of the threaded portion and gradually increases toward the end portion side. It is what According to the present invention, in the process in which the potato screw is screwed into the screw hole, the expanded end gradually expands outward, and the male screw formed on the outer surface of the axle part becomes the female screw formed on the inner surface of the ball holding metal fitting. It is strongly locked, and the screwed state between the axle part and the ball holding fitting can be maintained constant.

Further, in the invention according to claim 6 of the present application, in any one of claims 3 to 5, the fixed portion with an axle is separately attached to the frame so as to correspond to front and rear wheels, One or both of the front and rear axle-equipped fixing portions are slidable in the front-rear direction so that the distance between the front and rear axle-equipped fixing portions can be changed. According to the present invention, the front and rear wheel spacing can be changed by moving one or both of the front and rear axle-equipped fixing portions in the front-rear direction. Therefore, it is possible to appropriately change the wheel spacing according to the size of the shoes and the sliding comfort of the user.

Further, in the invention according to claim 7 of the present application, in any one of claims 3 to 6, the fixed portion with an axle is separately attached to the frame so as to correspond to front and rear wheels, One or both of the front and rear fixed parts with axles are attached to the frame so that the angle can be changed so that the direction of the wheels with respect to the traveling direction of the roller skates can be finely adjusted. According to the present invention, the angle of the wheel with respect to the traveling direction of the roller skates can be finely adjusted by slightly changing the angle of the fixed portion with the axle. This makes it possible to finely adjust the uncertainty of straightness due to the diagonal installation of the wheels from the inside of the shoe body to the bottom of the shoe bottom, and to adjust the appropriateness according to the sliding comfort of the user. The angle of the wheels can be adjusted.

Further, in the invention described in claim 8 of the present application, in any one of claims 1 to 7, the direction in which the hub fitting rotates when the roller skates travels forward is such that the ball holding fitting is screwed. It is characterized by being in the direction of cancellation. According to the present invention, it is possible to prevent the ball from being locked by being pushed more than necessary due to the progress of the screwing state of the ball holding fitting while the roller skating is in progress.

Further, in the invention according to claim 9 of the present application, in any one of claims 1 to 8, the direction in which the hub metal fitting is rotated when the roller skate is moved forward is such that the metal fitting fixing screw is screwed. It is characterized in that it is screwed deeper into the hole. According to the present invention, since the metal fitting fixing screw is screwed so as to be tighter while the roller skating is in progress, it is possible to prevent the metal fitting fixing screw from being accidentally removed and thereby the ball holding metal fitting from coming off.

The invention according to claim 10 of the present application is characterized in that, in any one of claims 1 to 9, the inclination of the wheel is 10 ° to 35 °. If the wheel inclination is 10 ° to 23 °, the center of gravity is high because the wheels are inclined so as to be relatively close to the vertical, but it is easy to speed up, so it is the optimum angle for the roller skates for competition. . Moreover, the inclination of the wheel is 23 ° to 35 °.
If the angle is °, the wheels are inclined so that they are relatively horizontal, so that the stability is good, and the angle is optimal for general-purpose roller skates.

The invention according to claim 11 of the present application is, in any one of claims 1 to 10, characterized in that a tire is detachably or irremovably fixed to the outer peripheral portion of the wheel. It is characterized by. According to the present invention, by mounting the tire on the outer peripheral portion of the wheel, the contact friction with the traveling road surface such as the ground is increased, the grip performance is improved, and the shock due to the small unevenness is absorbed to smoothly slide. Will be able to.

Further, the tire which is configured to be detachable by means of a metal fitting or the like can be replaced with a tire suitable for the road surface condition according to the condition of the road surface, so that an optimum running can be secured. . Furthermore, it is possible to provide a variety of choices in terms of fashion, such as wearing tires of different colors according to the taste of the user.

The invention according to claim 12 of the present application is the method according to any one of claims 1 to 11, wherein a reinforcing portion made of a relatively rigid material is formed inside the shoe body. It is characterized by that. According to the present invention, while preventing the deformation of the shoe body,
It is possible to prevent the wheels from coming into contact with the shoe body and rubbing the shoe body when the roller portion rotates.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of a roller portion of a roller skate 1 according to the present invention, and FIG.
3 and FIG. 3 are a side view and a top view of the roller skates of the present invention, respectively. Incidentally, the roller skates 1 of the present invention
Is composed of left and right foot parts that are symmetrical to each other, but FIGS. 1 to 3 show only the right foot part for simplicity.

The roller skates 1 are composed of shoes 3 and roller portions 5. The shoe 3 includes a shoe main body portion 7 and a shoe sole portion 9, and since these configurations are basically the same as those of the athletic shoe, they will not be described in detail here. The inside of the shoe body 7 (the left side for the right foot, the right side for the left foot) is provided with a reinforcing portion 11 made of a material having relatively high rigidity. In addition to preventing the above, the wheels, which will be described later, come into contact with the shoe body 7 to prevent the shoe body 7 from rubbing when the roller portion 5 rotates.

The roller section 5, as shown in FIG.
A metal bracket (specifically, aluminum) frame 13 that is bent to match the shape from the shoe body 7 to the shoe sole 9 is fixed with a circular substantially flat plate-shaped fixing bracket 15 with an axle. It is equipped with an axle fixing bracket 1
A cylindrical axle portion 17 stands up from the center of 5. A screw hole 1 in which an internal thread is formed inside the axle portion 17.
9 is formed. Further, a ring-shaped groove portion 21 is formed on the outer peripheral edge of the axle-equipped fixing member 15, and the groove portion 21 is formed.
A concave bearing surface 23 is formed on the.

A hub fitting 25 is provided on the outside of the axle portion 17. As shown in FIG. 5, a concavely curved bearing surface 27 is formed at a position inside the hub metal fitting 25 and facing the groove portion 21 of the axle-equipped fixing metal fitting 15, and a concavely curved bearing surface is formed on the opposite side. A surface 28 is formed. A plurality of balls 2 are provided between the bearing surface 23 of the axle mounting fixture 15 and the bearing surface 27 of the hub fitting 25.
9, the ball 29 is rotatably held between the bearing surfaces 23 and 27 by the presence of a ring-shaped regulating projection 31 formed outside the bearing surface 27 of the hub fitting 25.

A ball holding metal fitting 33 is provided on the axle portion 17 so as to overlap the hub metal fitting 25. A sleeve 35 that penetrates the inside of the hub fitting 25 in a non-contact state is formed inside the ball holding fitting 33, and a female screw formed on the inner surface of the sleeve 35 is provided with an internal thread.
Is screwed onto a male screw formed on the outer surface of the.

A bearing surface 37 curved in a concave shape is formed on the ball holding fitting 33 at a position facing the bearing surface 28 of the hub fitting 25, and between the bearing surface 37 and the bearing surface 28 of the hub fitting 25. Multiple balls 39
Is held in a rollable state.

Here, the screwing direction of the female screw of the sleeve 35 with respect to the male screw of the axle portion 17 will be described. With respect to the screwing direction of the female screw of the sleeve 35, the direction in which the hub fitting 25 rotates when the roller skate 1 moves forward is the rotational direction in which the screwing of the female screw of the sleeve 35 is released.
That is, the ball holding fitting 33 is oriented so as to move away from the hub fitting 25. With such a screwing direction, it is possible to prevent the ball 39 from being screwed more than necessary while the ball skating member 33 is being screwed while the roller skates 1 are moving, and the ball 39 is pressed and locked more than necessary.

Further, a metal fitting fixing screw 41 is provided outside the ball holding metal fitting 33. As shown in FIG. 5, the metal fitting fixing screw 41 has a substantially T-shaped cross section, and has a threaded convex portion 43 formed with a male screw around the center thereof. Further, on the periphery of the metal fitting fixing screw 41, the screwing convex portion 4
3, a metal fitting contact portion 45 is formed that abuts on the end surface 46 of the ball holding metal fitting 33 and prevents the ball holding metal fitting 33 from coming off. The male screw of the threaded convex portion 43 is screwed into the female screw of the screw insertion hole 19 until the metal fitting contact portion 45 contacts the end surface 46 of the ball holding metal fitting 33, whereby the ball holding metal fitting 33 and the hub metal fitting 25 are connected. Is the axle 1
The state of being attached to 7 is maintained.

A threaded convex portion 43 for the female screw of the screw insertion hole 19
The direction in which the male screw of (3) is screwed is the same as the direction in which the hub metal fitting 25 rotates when the roller skate 1 moves forward as the direction in which the male screw of the metal fitting fixing screw 41 is deeply screwed. With such a screwing direction, the metal fitting fixing screw 41 is screwed so as to be tighter while the roller skate 1 is moving, so that the metal fitting fixing screw 41 is accidentally removed during use of the roller skate 1, As a result, it is possible to reliably avoid the risk that the ball holding fitting 33 will come off.

A flange portion 47 is formed on the peripheral surface of the hub fitting 25, and the flange portion 47 is formed with a plurality of screw holes 49 in which female threads are formed. Then, the wheel 51 is partially overlapped with the flange portion 47 so that the wheel 51 is
It is provided such that 7 is the center of rotation. Through holes 53 are formed in the inner edge of the wheel 51 at positions corresponding to the screw holes 49 of the flange portion 47, respectively.
The wheel 51 is fixed to the hub fitting 25 by screwing a screw 55 into the screw hole 49 of the flange portion 47 via the.

The wheel 51 has a bowl shape in which the side facing the shoe body 7 is formed in a concave shape and the opposite surface side is formed in a convex shape. Instead of such a shape, a mortar shape in which the side facing the shoe body 7 is curved in a shape relatively close to a straight line may be adopted. Since the wheel 51 is bowl-shaped or mortar-shaped in this way, the wheel 51 can be attached so as to cover the part projecting inward of the shoe body 7, so that the wheel 51 is tilted too much. Instead, the ground contact portion of the wheel 51 can be positioned near the center of the shoe sole 9. In this case, the inclination α of the wheel 51 (see FIG. 4)
Can be changed between general use and competition use, 23 ° to 35 ° for general use, and 10 ° to 23 ° for competition use.
It is preferable to set to °.

A rubber tire 57 is provided on the outer peripheral edge of the wheel 51.
Is provided. The tire 57 may be fixed to the wheel 51 by a plurality of screws 63 that hold the detachable fitting 64, or may be formed integrally with the wheel 51. The ground contact point 61 (see FIG. 4) of the tire 57 is positioned near the center of the shoe sole 9.

The roller skates 1 as described above can be used basically in the same manner as conventional roller skates. That is, when the wearer of the roller skates 1 kicks the ground with one foot and applies forward propulsive force to the other foot to the ground, the hub metal fitting 25 to which the wheel 51 is attached causes the ball fitting 29 39, the tire 57 rotates around the axle portion 17, and the tire 57 rotates while continuously changing its ground contact portion. This allows the wearer of the roller skates to move forward.

Next, another embodiment of the roller skates according to the present invention will be described. In the embodiment shown in FIG.
Axle-attached fixing bracket 15 corresponding to the front and rear wheels 51
A and 15b are attached to the frame 13.
Four long holes 65 extending long in the traveling direction of the roller skates are formed in each of the axle-equipped fixing brackets 15a and 15b, and screw holes 67 are formed at positions corresponding to the four long holes 65 on the frame 13 side. (See FIG. 7).

In such an embodiment, as shown in FIG. 6, when the flanged screws 69 are screwed into the screw holes 67 of the frame 13 through the four elongated holes 65 and tightened, the fixing brackets with axles are attached. It is possible to position 15a and 15b at arbitrary positions before and after in the traveling direction of the roller skates. Therefore, the distance between the front and rear wheels 51 can be changed by changing the distance between the axle fixing fittings 15a and 15b. Therefore, the front and rear wheel distances can be changed according to the size of the shoe, and the sliding comfort of the user can be changed. It is possible to change the wheel spacing appropriately according to the above. As a modification of this example, it is possible to move only one of the axle-equipped fixing fittings 15a and 15b back and forth and fix the other to the frame 13.

Further, in the embodiment shown in FIG. 8, similar to the embodiment shown in FIG. 6, separate axle-equipped fixing fittings 15a, 15b are attached to the frame 13 corresponding to the front and rear wheels 51. In each of the axle-equipped fixing brackets 15a and 15b of this example,
A fulcrum hole 71 serving as a swing fulcrum, two first elongated guide holes 73 arranged in front of and behind the fulcrum hole 71 and extending in a direction substantially orthogonal to the traveling direction of the roller skates, and outside the fulcrum hole 71 The second, which is formed on the side where the little finger of the foot is located) and extends in an arc shape in the traveling direction of the roller skates.
A guide slot 75 is formed. Further, on the frame 13 side, as in the embodiment of FIG. 6, screw holes 67 as shown in FIG. 7 are provided at positions corresponding to the fulcrum hole 71, the two first elongated guide holes 73 and the second elongated guide holes 75. Are formed.

In this embodiment, as shown in FIG. 8, the flanged screw 69 is provided with the fulcrum hole 71 and the two first screws.
Through the guide long hole 73 and the second guide long hole 75, the frame 1
It is screwed into the screw hole 67 of No. 3, but at this time, the axle fittings 15a, 15b can be fixed to the frame 13 while being slightly rotated clockwise or counterclockwise around the fulcrum hole 71. it can. Therefore, the directions of the front and rear wheels 51 can be selectively tilted by a predetermined angle with respect to the traveling direction of the roller skates for fine adjustment. This makes it possible to finely adjust the uncertainty of straightness due to the diagonal installation of the wheels from the inside of the shoe body to the bottom of the shoe bottom, and to adjust the appropriateness according to the sliding comfort of the user. The angle of the wheels can be adjusted. Also in this example, it is also possible to adjust the angle of only one of the axle fittings 15a and 15b and fix the other to the frame 13.

Next, FIG. 9 shows another embodiment for fixing the ball holding fitting 33 to the axle portion 17. In this example, a screw-in hole 19 with a female screw is formed inside the axle portion 17, and a plurality of slits 79 are formed on the outer end side of the screw-in hole 19 so that it can be expanded to the outside. An edge 80 is formed. A ball holding metal fitting 33 with a sleeve 35 is screwed onto the outside of the axle portion 17 as in the embodiment shown in FIG. 8 screw 8 in the screw hole 19
1 can be screwed. The potato screw 81 includes a screw portion 83 and an enlarged diameter portion 85 that is formed on the opposite end side of the screw portion 83 and gradually increases toward the end portion side. Inside the enlarged diameter portion 85, a hexagon wrench is provided. A hexagonal hole 87 for engagement is formed.

When the potato screw 81 having such a configuration is screwed into the screw-in hole 19 of the axle portion 17 using a hexagon wrench, the expansion end 80 gradually expands to the outside, and the axle portion 1
7 The male screw formed on the outer surface strongly engages with the female screw formed on the inner surface of the ball holding fitting 33. In the description of the embodiment of FIG. 1, the relationship between the screwing direction of the female screw of the sleeve 35 and the traveling direction of the roller skates 1 has been described. However, by adopting the configuration of this example,
In the case where the roller skate 1 travels back, which has not been considered so much in the embodiment, the axle portion 1
Since the screwed state between the ball holding metal fitting 7 and the ball holding metal fitting 33 can be maintained constant, the wheel 51 can continue to rotate smoothly and stably.

[0037]

According to the present invention, since it is possible to employ wheels having a diameter of about 14 cm, which is not possible with conventional roller skates, it is possible to enjoy roller skating at a high speed comparable to ice skating faster than before. it can. Also, because the wheels are installed diagonally, you can experience a soft sliding feeling unlike conventional roller skates.

Further, by forming the wheel into a bowl shape or a mortar shape, it is possible to mount the wheel so as to cover the part projecting inward of the shoe main body, so that the wheel does not tilt too much and the wheel touches the ground. It is possible to position the portion near the center of the shoe sole.

Further, with the roller skates according to the present invention, the following developmental effects can be expected. By allowing roller skates to run at the same high speed as ice skating, it is different from flat rinks for ice skating. It is possible to implement a dynamic speed competition that makes the most of the difference in height with links that do not have a gap. Also,
This roller skates can run on the heel of one foot and only one wheel on the toes, can run on curved surfaces, and can also slide like figure skating and ice dance. That is,
It enables the birth of a new type of skating that combines the speed and smooth running of ice skating with the ease of roller skating. Therefore, this roller skating is considered to have the power to activate society by creating new ways of playing and playing, like a skateboard.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a roller portion of a roller skate (only for a right foot) of the present invention.

FIG. 2 is a side view of the roller skates (for right foot only) of the present invention.

FIG. 3 is a plan view of the roller skates (for right foot only) of the present invention.

FIG. 4 is a rear view of the roller skates according to the present invention.

FIG. 5 is a sectional view showing a roller portion of the roller skates according to the present invention.

FIG. 6 is a rear view showing an embodiment according to the present invention in which the axle-equipped fixing bracket can be slidably attached to the front and rear of the frame.

FIG. 7 is a rear view of the frame according to the present invention.

FIG. 8 is a rear view showing an embodiment according to the present invention in which an angle of a fixing bracket with an axle can be adjusted.

FIG. 9 is a cross-sectional view showing another embodiment for fixing the ball holding fitting to the axle according to the present invention.

[Explanation of symbols]

1 roller skates 3 shoes 5 Roller part 7 shoes body 9 shoe sole 11 Reinforcement part 13 frames Fixing bracket with 15 axles 17 axles 19 screw hole 21 groove 23 Bearing surface 25 Hub bracket 27, 28 Bearing surface 29 balls 31 Control convex part 33 ball holder 35 sleeve 37 Bearing surface 39 balls 41 metal fitting fixing screw 43 Threaded convex part 45 Metal fitting contact part 46 End face of ball holding bracket 47 Flange 49 screw holes 51 wheels 53 through hole 55 screws 57 tires 61 Grounding point 63 screws 64 Detachable fitting 65 long hole 67 screw holes 69 screw with collar 71 fulcrum hole 73 First guide slot 75 Second guide slot 79 slits 80 Extended end 81 potato screw 83 screw part 85 Expanding part 87 Hexagonal hole

Claims (12)

[Claims] 1. A pair of shoes having a shoe body and a shoe sole, and a roller portion provided on each shoe, wherein the roller portion extends obliquely downward inside the shoe body. And a front wheel and a rear wheel rotatably provided on the axle, the diameter of the wheel is larger than the distance between the shoe sole and the ground, and the grounding point of the wheel is substantially in the center of the shoe sole. The roller skates are characterized in that the wheels are obliquely provided from the inside of the shoe body to the bottom of the shoe bottom. 2. The wheel according to claim 1, wherein the wheel has a bowl shape or a mortar shape in which the shoe body portion side is formed in a concave shape and the opposite side is formed in a convex shape. Roller skates. 3. The roller portion according to claim 1, further comprising a frame fixed from the shoe body portion to a shoe bottom portion, and an axle-equipped fixing portion provided on the frame, wherein the axle portion is the axle. Is formed so as to project from the attached fixing portion, the axle portion has a screw hole in which an internal thread is formed on the inner peripheral surface, and is a cylindrical shape in which an external thread is formed on the outer peripheral surface, around the axle portion. Is provided with a hub fitting, and a plurality of balls are rotatably arranged between a bearing surface formed on the fixed portion with the axle and a bearing surface formed on the hub fitting, and around the axle portion. A ball holding metal fitting, which is overlapped with the hub metal fitting, is provided by being screwed into a male screw on the outer peripheral surface of the axle portion, and another bearing surface formed on the opposite side of the bearing surface of the hub metal fitting, and the ball holding metal fitting. In shape A plurality of balls are rotatably arranged between the ball bearing and the formed bearing surface, and a metal fitting fixing screw is screwed into the female screw of the threaded hole of the axle to prevent the ball holding metal fitting from being detached. The roller skates, wherein the wheel is fixed to the hub metal fitting. 4. The metal fitting abutment portion is formed on the metal fitting fixing screw according to claim 3, and the metal fitting abutment portion abuts an end surface of the ball holding metal fitting to prevent the ball holding metal fitting from being detached. Roller skates characterized by doing. 5. The expandable end according to claim 3, wherein a plurality of slits are formed on the outer end side of the screw-in hole of the axle part, and an expandable end is formed, and the screw-in hole has a screw part. The roller skates are characterized in that a screw can be screwed together, and a diameter-increasing portion that is formed on the opposite end side of the screw portion and gradually increases toward the end portion. 6. The method according to any one of claims 3 to 5,
The axle-equipped fixing portion is separately attached to the frame so as to correspond to front and rear wheels, and one or both of the front and rear axle-equipped fixing portions can be changed so that the distance between the front and rear axle-equipped fixing portions can be changed. Roller skates characterized by being slidable in the front-back direction. 7. The method according to any one of claims 3 to 6,
The axle-equipped fixing portion is separately attached to the frame so as to correspond to the front and rear wheels, and one of the front and rear axle-equipped fixing portions so that the direction of the wheel with respect to the traveling direction of the roller skates can be finely adjusted. Roller skates characterized in that both are attached to the frame so that the angle can be changed. 8. The method according to claim 1, wherein
Roller skates characterized in that the direction in which the hub fitting rotates when the roller skates move forward is the direction in which the ball holding fitting is unscrewed. 9. The method according to claim 1, wherein
A roller skate characterized in that the direction in which the hub fitting rotates when the roller skating moves forward is the direction in which the fitting fixing screw is deeply screwed into the screw hole. 10. The roller skates according to claim 1, wherein the wheel has an inclination of 10 ° to 35 °. 11. The roller skates according to claim 1, wherein a tire is detachably or non-detachably fixedly attached to an outer peripheral portion of the wheel. 12. The roller skates according to claim 1, wherein a reinforcing portion made of a highly rigid material is formed inside the shoe body.