WO2008018661A1

WO2008018661A1 - Roller device for use in footwear

Info

Publication number: WO2008018661A1
Application number: PCT/KR2006/005734
Authority: WO
Inventors: Deok Ki Kim
Original assignee: Deok Ki Kim
Priority date: 2006-08-08
Filing date: 2006-12-27
Publication date: 2008-02-14

Abstract

The present invention relates to a roller device for mounting footwear thereon that has a footwear's front portion- supporting stand disposed coming into close contact with a front portion of the footwear, a footwear's rear portion- supporting stand disposed coming into close contact with a rear portion of the footwear, the footwear's front portion- supporting stand and the footwear's rear portion-supporting stand being disposed in a lengthwise direction thereof, and front and rear wheel-supporting stands with wheels rotatably coupled thereto disposed on the lower ends of the footwear's front portion- supporting stand and the footwear's rear portion-supporting stand, the roller device including: a ball-fixing means having an upper side part having an inner surface adapted to closely surround the ball portion of the footwear and a lower side part coupled to the footwear's front portion-supporting stand in such a manner as to make the upper side part protruded upwardly from the front end portion of the footwear's front portion-supporting stand; and a heel-fixing means having an upper side part having an inner surface adapted to closely surround the heel portion of the footwear and a lower side part coupled to the footwear's rear portion-supporting stand in such a manner as to make the upper side part protruded upwardly from the rear end portion of the footwear's rear portion-supporting stand, wherein one of the ball-fixing means and the heel- fixing means is moved forwardly or backwardly to allow the footwear to be detachably mounted on the roller device.

Description

Description ROLLER DEVICE FOR USE IN FOOTWEAR

Technical Field

[1] The present invention relates to a roller device for mounting footwear thereon, and more particularly, to a roller device for mounting footwear thereon that is configured to fixedly mount footwear thereon by tightly surrounding the footwear's ball and heel portions at the outside thereof, thereby allowing a wearer's footwear to be easily mounted thereon, when he or she desires to skate. Background Art

[2] Generally, a roller device, which is designed to allow a wearer to move over a flat surface, includes roller-skates, rollerblades, and so on.

[3] Such the roller-skates have a configuration wherein a roller device with wheels mounted along the bottom thereof is coupled integrally with the soles of shoes, such that when a wearer moves his or her foot, the wheels are rotated to enable him or her to move to a given direction at a given speed.

[4] Since the conventional roller-skates have the roller device formed integrally with each shoe, however, they are so bulky that it is difficult for a wearer to delivery and keep them to a given place, and further, they are so heavy that it is inconvenient to handle and use them.

[5] To improve these problems the conventional roller-skates have had, there is disclosed Korean Utility Model Registration No.20-0388737 filed by the same applicant as the present invention, which suggests a combined footwear and roller- skate including a footwear assembly having an upper, a mid-sole, a mid- sole-supporting stand, and an out-sole, and a roller-skate assembly mounted below the out-sole of the footwear assembly and having a shoe-supporting stand, a driving part, a friction member, and a locking part.

[6] In the conventional combined footwear and roller-skate, the footwear assembly is detachably mounted at the roller-skate assembly, such that a wearer who is wearing the footwear, while carrying the roller-skate assembly with him or her, easily mounts the roller-skate assembly below the out-sole of the footwear assembly, if necessary, thereby making it convenient to delivery, keep, and handle them.

[7] However, the roller-skate assembly in the combined shoe and roller-skate has the footwear-supporting stand fixed to a given length, which limits the size of footwear to be mounted on the roller-skate assembly, and therefore, the different sizes of roller- skate assemblies should be mounted in accordance with the sizes of footwear to be mounted thereon. To improve these inconveniences, there is disclosed Korean Utility Model Registration No.20-0393791 filed by the same applicant as the present invention, which suggests length-adjustable detachable footwear and a connection device thereof.

[8] According to the conventional length-adjustable detachable footwear and a connection device thereof, the footwear- supporting stand of the roller-skate assembly includes a footwear's front portion- supporting stand, a footwear's rear portion- supporting stand, and an adjusting means adapted to be coupled with the footwear's front portion- supporting stand and the footwear's rear portion-supporting stand at both ends thereof, thereby adjusting the length of the footwear- supporting stand to a desired size.

[9] In the conventional combined footwear and roller-skate and length-adjustable detachable footwear and a connection device thereof, so as to couple the roller-skate assembly with the footwear assembly, the roller-skate assembly includes the locking part mounted at the top front side of the footwear-supporting stand and a coupling member disposed at the rear side of the footwear-supporting stand, and the footwear assembly includes a loop member mounted at the front and rear portions of the bottom surface of the out-sole, for fixedly coupling with the locking part and the coupling member.

[10] However, as there is a need for footwear having a specific structure wherein a fixing structure like the loop member is mounted on the out-sole thereof, the footwear for use in the roller-skates should be necessarily bought for the skating, thereby making the costs for buying the product raised. Additionally, the wearer has to carry the roller-skates with him or her, together with the footwear to be mounted thereon, thereby making inconvenient to delivery or keep them to a given place.

[11] Therefore, there is a need for the development of the roller-skates for mounting footwear thereon, irrespective of the kinds of footwear.

[12] Like general roller-skates, on the other hand, the conventional roller-skates suggested by the same applicant as the present invention apply the impacts generated during the skating directly to a wearer's feet through the wheels mounted thereon. Thereby, the conventional roller-skates as mentioned above have the problems in that the impacts generated upon jumping are directly transmitted to the wearer's ankles, such that he or she may be hurt. Disclosure of Invention Technical Problem

[13] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a roller device for mounting footwear thereon that is capable of effectively reducing the impacts transmitted to a wearer's ankles through wheels, thereby protecting the wearer's ankles.

[14] It is another object of the present invention to provide a roller device for mounting footwear thereon that is configured to fixedly mount the footwear thereon by tightly surrounding the footwear's ball and heel portions at the outside thereof, instead of fixing footwear to a roller-skate assembly by means of locking members provided correspondingly to an out-sole of the footwear and the roller-skate assembly, thereby allowing a wearer's footwear to be easily mounted thereon, whenever he or she desires to skate, without having a separate fixing device. Technical Solution

[15] To achieve the above objects, there is provided a roller device for mounting footwear thereon that has a footwear's front portion-supporting stand disposed coming into close contact with a front portion of the footwear, a footwear's rear portion- supporting stand disposed coming into close contact with a rear portion of the footwear, the footwear's front portion- supporting stand and the footwear's rear portion- supporting stand being disposed in a lengthwise direction thereof, and front and rear wheel-supporting stands with wheels rotatably coupled thereto disposed on the lower ends of the footwear's front portion- supporting stand and the footwear's rear portion- supporting stand, the roller device including: a ball-fixing means having an upper side part having an inner surface adapted to closely surround the ball portion of the footwear and a lower side part coupled to the footwear's front portion- supporting stand in such a manner as to make the upper side part protruded upwardly from the front end portion of the footwear's front portion-supporting stand; and a heel-fixing means having an upper side part having an inner surface adapted to closely surround the heel portion of the footwear and a lower side part coupled to the footwear's rear portion- supporting stand in such a manner as to make the upper side part protruded upwardly from the rear end portion of the footwear's rear portion- supporting stand, wherein one of the ball-fixing means and the heel-fixing means is moved forwardly or backwardly to allow the footwear to be detachably mounted on the roller device.

[16] The roller device for mounting footwear thereon according to the present invention is capable of mounting general footwear thereon in a simple manner. According to the technical characteristics of the present invention, the roller device for mounting footwear thereon includes a ball-fixing means and a heel-fixing means. The roller device for mounting footwear thereon according to the present invention provides the ball-fixing means and the heel-fixing means formed closely contacting with the ball and heel portions of the footwear, thereby making the footwear rigidly fixed thereto. The roller device for mounting footwear thereon according to the present invention is capable of effectively reducing the impacts transmitted through wheels to a wearer's ankle, thereby protecting the wearer's ankle while in use.

Advantageous Effects

[17] According to the roller device for mounting footwear thereon, the length of the roller device is adjusted in forward and backward directions to allow various sizes of footwear to be mounted thereon, the ball-fixing means coupled with a footwear's front portion-supporting stand and the heel-fixing means coupled with a footwear's rear portion-supporting stand are provided to allow various footwear with no additional fixing device to be mounted with ease, and the height of the ball- fixing means is adjusted to allow the footwear having various heights to be mounted. Additionally, the roller device for mounting footwear thereon according to the present invention is capable of absorbing the impacts applied from the wheels by means of springs to allow the impacts transmitted to a wearer's ankle upon the generation of impacts like jumping to be greatly reduced, thereby decreasing the dangers of hurting the wearer's ankle. Brief Description of the Drawings

[18] FIG.1 is a plane view showing a roller device for mounting footwear thereon according to a first embodiment of the present invention;

[19] FIG.2 is a front view showing the roller device according to the first embodiment of the present invention;

[20] FIG.3 is a bottom view showing the roller device according to the first embodiment of the present invention;

[21] FIG.4 is a plane view showing the coupling relation between a ball-fixing means and a footwear's front portion-supporting stand in the roller device according to the first embodiment of the present invention;

[22] FIG.5 is a front view showing the coupling relation between a ball-fixing means and a footwear's front portion-supporting stand in the roller device according to the first embodiment of the present invention;

[23] FIG.6 is a view showing the coupling relation of an adjusting means as shown in

FIG.5;

[24] FIG.7 is an exploded perspective view showing a heel-fixing means in the roller device according to the first embodiment of the present invention;

[25] FIG.8 is a view showing the rotary structure of a ball-fixing means of the roller device according to a second embodiment of the present invention;

[26] FIG.9 is a view showing the rotary structure of a heel-fixing means of the roller device according to the second embodiment of the present invention;

[27] FIGS.10 and 11 are views showing the states of using the roller device according to the second embodiment of the present invention;

[28] FIG.12 is a side view showing a roller device for mounting footwear thereon according to a third embodiment of the present invention; and

[29] FIG.13 is an exploded view showing a structure capable of reducing the impacts applied through wheels in FIG.12. Best Mode for Carrying Out the Invention

[30] To achieve the above-mentioned objects, according to the present invention, there is provided a roller device for mounting footwear thereon that has a footwear's front portion-supporting stand 111 disposed coming into close contact with a front portion of the footwear 2, a footwear's rear portion- supporting stand 112 disposed coming into close contact with a rear portion of the footwear 2, the footwear's front portion- supporting stand 111 and the footwear's rear portion-supporting stand 112 being disposed in a lengthwise direction thereof, and front and rear wheel-supporting stands 19 and 20 with wheels 12 rotatably coupled thereto disposed on the lower ends of the footwear's front portion-supporting stand 111 and the footwear's rear portion- supporting stand 112, the roller device 1, 1' including: a ball-fixing means 13 having an upper side part 132 having an inner surface adapted to closely surround the ball portion of the footwear 2 and a lower side part 133 coupled to the footwear's front portion-supporting stand 111 in such a manner as to make the upper side part 132 protruded upwardly from the front end portion of the footwear's front portion- supporting stand 111; and a heel-fixing means 14 having an upper side part 142 having an inner surface adapted to closely surround the heel portion of the footwear 2 and a lower side part 143 coupled to the footwear's rear portion- supporting stand 112 in such a manner as to make the upper side part 142 protruded upwardly from the rear end portion of the footwear's rear portion- supporting stand 112, wherein one of the ball- fixing means 13 and the heel-fixing means 14 is moved forwardly or backwardly to allow the footwear 2 to be detachably mounted on the roller device.

[31] According the roller device 1, 1' for mounting footwear thereon, the footwear's front portion-supporting stand 111 has coupling grooves 131 formed backwardly indented from the front face of the front end portion thereof, and the ball- fixing means 13 has fixing protrusions 1331 formed coupled with the coupling grooves 131 at the lower side part thereof, the coupling grooves 131 and the fixing protrusions 1331 each having a plurality of fixing holes 1312 and 1327 formed thereon for placing the coupling grooves 131 and the fixing protrusions 1331 at the same position when coupled with each other, thereby fixing the footwear's front portion-supporting stand 111 and the ball-fixing means 13 to each other by means of pin-coupling through the fixing holes 1312 and 1327.

[32] According the roller device 1, 1' for mounting footwear thereon, the footwear's front portion-supporting stand 111 and the ball-fixing means 13 are coupled to each other at the inner side of the coupling grooves 131 and at the outer side of the fixing protrusions 1331 and further include a plurality of height-adjusting members 160 formed at same intervals in upward and downward directions, such that the up and down coupling positions of the ball-fixing means 13 is adjusted in accordance with the ball height of the footwear 2 to be mounted thereon.

[33] According the roller device 1, 1' for mounting footwear thereon, the footwear's rear portion-supporting stand 112 includes a sliding groove 1411 formed on the top surface thereof in such a manner as to be opened backwardly and upwardly and fastening protrusions 1412 formed at the inner rear sides of the sliding groove 1411, and the heel-fixing means 14 includes: a moving body 1421 disposed at the lower side part 143 thereof in such a manner as to be slidably inserted into the sliding groove 1411, the moving body 1421 having guide longitudinal holes 1426 formed at the inside thereof to have a length extended forwardly from the rear ends of the fastening protrusions 1412 in such a manner as to slidably insert the fastening protrusions 1412 therealong; springs 145 adapted to be inserted into the guide longitudinal holes 1426 of the moving body 1421 in such a manner as to be supported at the rear ends by means of the fastening protrusions 1412 for applying an elastic force to the moving body 1421; and a cover 144 disposed on the upper portion of the moving body 1421 for sliding the moving body 1421 into the sliding groove 1411 in such a manner as to be coupled to the footwear's rear portion- supporting stand 112 for covering the top surface of the sliding groove 1411, wherein at the state where the ball-fixing means 13 is fixed, the heel-fixing means 14 is moved to detachably mount the footwear 2 on the roller device 1.

[34] According the roller device 1, 1' for mounting footwear thereon, the ball-fixing means 13 is formed having the upper side part 132 having a larger width than the footwear's front portion-supporting stand 111 and hinge-coupled with the lower side part 133 in such a manner as to be rotated backwardly with respect to the lower side part 133, such that the ball-fixing means 13 is bent to the upper side of the footwear's front portion- supporting stand 111 to come into close contact therewith, and the heel- fixing means 14 is formed having the upper side part 142 having a larger width than the footwear's rear portion- supporting stand 112 and hinge-coupled with the lower side part 143 in such a manner as to be rotated forwardly with respect to the lower side part 143, such that the heel- fixing means 14 is bent to the upper side of the footwear's rear portion-supporting stand 112 to come into close contact therewith.

[35] According the roller device 1, 1' for mounting footwear thereon, each of a front side wheel-supporting stand 19 and a rear side wheel- supporting stand 20 includes: a wheel-locking frame 200 having a shaft 122 disposed on the lower portion thereof for coupling with the wheels 12 at both sides thereof, a pocket boss 204 protruded vertically on the top portion thereof in such a manner as to have a hollow hole 206 formed in the middle portion thereof, and stoppers 208 formed protruded outwardly at the outer face of the top side of the pocket boss 204; a locking groove part 230 formed on the lower surface of each of the footwear's front portion-supporting stand 111 and the footwear's rear portion- supporting stand 112 in such a manner as to slidably insert the pocket boss 204 of the wheel-locking frame 200 upwardly and downwardly thereinto and having a cut-off hole 234 formed at both side portions thereof for slidably inserting the stoppers 208 thereinto; a spring 220 inserted supportably at one side thereof into the hollow hole 206 of the pocket boss 204 and at the other side thereof into the locking groove part 230, for applying an elastic force to the wheel- locking frame 200 in a downward direction with respect to each of the footwear's front portion-supporting stand 111 and the footwear's rear portion-supporting stand 112; and a holding plate 250 disposed at the lower side of the locking groove part 230 in such a manner as to be coupled to each of the footwear's front portion- supporting stand 111 and the footwear's rear portion- supporting stand 112 for blocking the lower side of the cut-off hole 234, thereby supporting the stoppers 208 of the wheel-locking frame 200 such that the wheel-locking frame 200 is supported by each of the footwear's front portion-supporting stand 111 and the footwear's rear portion-supporting stand 112. Mode for the Invention

[36] Hereinafter, an explanation of the roller device according to the preferred embodiments of the present invention will be given with reference to FIGS.1 to 13, wherein the same reference numerals are designated to the parts having the same functions in FIGS.l to 13. On the other hand, the illustration and description on the configurations and operations in general roller devices for mounting footwear thereon that are apparent to those skilled in the art will be explained briefly or avoided. Especially, an explanation and illustration on the technical structure and operation of the parts that are not related directly to the technical features of the present invention will be avoided, and thus, an explanation on the technical structure related to the present invention will be given. In the drawing, the ratios of sizes of parts of the present invention may be different or the sizes of the coupled parts may be different, but the differences can be understood easily to those skilled in the art. Therefore, an additional explanation on the parts will not be given below.

[37] FIG.1 is a plane view showing a roller device for mounting footwear thereon according to a first embodiment of the present invention, FIG.2 is a front view showing the roller device according to the first embodiment of the present invention, FIG.3 is a bottom view showing the roller device according to the first embodiment of the present invention, FIG.4 is a plane view showing the coupling relation between a ball-fixing means and a footwear's front portion-supporting stand in the roller device according to the first embodiment of the present invention, FIG.5 is a front view showing the coupling relation between a ball-fixing means and a footwear's front portion- supporting stand in the roller device according to the first embodiment of the present invention, FIG.6 is a view showing the coupling relation of an adjusting means as shown in FIG.5, FIG.7 is an exploded perspective view showing a heel-fixing means in the roller device according to the first embodiment of the present invention, FIG.8 is a view showing the rotary structure of a ball-fixing means of the roller device according to a second embodiment of the present invention, FIG.9 is a view showing the rotary structure of a heel- fixing means of the roller device according to the second embodiment of the present invention, and FIGS.10 and 11 are views showing the states of using the roller device according to the second embodiment of the present invention.

[38] Referring to FIGS.1 to 7, each of the roller devices 1 and 1' for mounting footwear thereon according to a first embodiment of the present invention includes the footwear's front portion-supporting stand 111 adapted to come into close contact with the front portion of the footwear 2, the footwear's rear portion-supporting stand 112 adapted to come into close contact with the back portion of the footwear 2, and the plurality of wheels 12 rotatably fixed to the wheel-supporting stands 19 and 20 disposed on the lower ends of the footwear's front portion-supporting stand 111 and the footwear's rear portion- supporting stand 112. The roller device of the present invention can be adjustable forwardly and backwardly by means of the adjusting means 113 disposed between the footwear's front portion- supporting stand 111 and the footwear's rear portion-supporting stand 112.

[39] According to the technical features of the roller devices 1 and 1' of the present invention, the footwear's front portion-supporting stand 111 is provided with the ball- fixing means 13 for fixing a ball portion of the footwear 2 thereto, and the footwear's rear portion-supporting stand 112 is provided with the heel-fixing means 14 for fixing a heel portion of the footwear 2 thereto.

[40] The footwear's front portion- supporting stand 111 and the footwear's rear portion- supporting stand 112 are formed at front and back portions in a lengthwise direction in the roller devices 1 and 1' of the present invention, and they have a flat plate having a given area on the upper surface thereof for mounting the footwear 2 thereon. In this case, the upper surfaces of the footwear's front portion-supporting stand 111 and the footwear's rear portion- supporting stand 112 are of the same shapes as the front and back portions of the footwear 2, for supporting the footwear 2 thereon in a more stable manner.

[41] The footwear 2 that is supported by the footwear's front portion- supporting stand

111 and the footwear's rear portion-supporting stand 112 is not footwear separately made for use in the roller devices 1 and 1', but general footwear like sports shoes, shoes, mountaineering boots, and so on. Thus, as the ball-fixing means 13 formed on the front end portion of the footwear's front portion-supporting stand 111 and the heel- fixing means 14 formed on the rear end portion of the footwear's rear portion- supporting stand 112 come into close contact with the front and back sides of the footwear 2, the footwear 2 is fixed to each of the roller devices 1 and 1'.

[42] According to the present invention, the ball-fixing means 13 has the upper side part

132 protruded upwardly to a given height from the front end portion of the footwear's front portion- supporting stand 111 in such a manner as to be bent to the same shape as the ball of the footwear 2 to surround the entire ball of the footwear 2 by a given area, and has the lower side part 133 fixedly coupled to the front end portion of the footwear's front portion-supporting stand 111.

[43] Thereby, the front, side and top faces of the ball portion of the footwear 2 come into close contact with the inner side of the upper side part 132 of the ball-fixing means 13, such that even though a force is applied to the footwear 2, the ball-fixing means 13 is rigidly fixed to the footwear's front portion- supporting stand 111, without any movement in forward, left and right, and upward and downward directions.

[44] According to the present invention, the heel-fixing means 14 has the upper side part

142 protruded upwardly to a given height from the front end portion of the footwear's rear portion-supporting stand 112 in such a manner as to be bent to the same shape as the heel of the footwear 2 to surround the entire heel of the footwear 2 by a given area, and has the lower side part 143 fixedly coupled to the rear end portion of the footwear's rear portion- supporting stand 112. Thereby, the rear, side and top faces of the heel portion of the footwear 2 come into close contact with the inner side of the upper side part 142 of the heel-fixing means 14, such that even though a force is applied to the footwear 2, the heel-fixing means 14 is rigidly fixed to the footwear's rear portion-supporting stand 112, without any movement in backward, left and right, and upward and downward directions.

[45] The footwear 2 is fixed in the forward and backward directions at the same time by means of the ball-fixing means 13 and the heel-fixing means 14 formed on the front and rear end portions of the footwear's front portion-supporting stand 111 and the footwear's rear portion- supporting stand 112, such that even though a force is applied forwardly and backwardly to the footwear 2, the footwear 2 is strongly fixed, without any movement.

[46] FIGS.1 to 5 show the detailed configuration of the ball-fixing means 13 of the roller device according to the first embodiment of the present invention. As shown, the upper side part 132 of the ball- fixing means 13 includes a first supporter 1322 having an arch-like shape and forming a lower end portion of the ball-fixing means 13, one or more first vertical mounting pieces 1323 having the same vertically curved face as the ball of the footwear 2 in such a manner as to be protruded upwardly to a given length from the top side of the first supporter 1322 to allow the top end of the ball of the footwear 2 to come into close contact therewith in a vertical direction; and one or more first horizontal mounting pieces 1324 having the same horizontally curved face as the ball of the footwear 2 in such a manner as to be fixed to a given height at the first vertical mounting pieces 1323 to allow the top end of the ball of the footwear 2 to come into close contact therewith in a horizontal direction, and the lower side part 133 of the ball-fixing means 13 includes the fixing protrusions 1331 fixed at the front end to the first supporter 1322 in such a manner as to be protruded backwardly to a given length.

[47] The first supporter 1322 has the first vertical mounting pieces 1323 and the fixing protrusions 1331 rigidly fixed thereto, such that even though a force is applied to the footwear 2, the first vertical mounting pieces 1323 and the fixing protrusions 133 are kept at their fixed position.

[48] In this case, the first supporter 1322, which is placed at the front end of each roller devices 1 and 1', has an arch-like shape, thereby making the friction with air during skating greatly reduced and allowing the damages or deformation caused by obstacles to be substantially suppressed.

[49] The first vertical mounting pieces 1323 and the first horizontal mounting pieces

1324, which are the parts coming into close contact with the ball of the footwear 2, are formed of a soft material, such that even though a force is applied to the footwear 2, they serve to fix the ball of the footwear 2, without having any deformation in its original shape.

[50] In this case, the first vertical mounting pieces 1323 and the first horizontal mounting pieces 1324 are spaced apart from one another at given intervals, desirably for fixing the ball of the footwear 2 in a more stable manner.

[51] Further, the first vertical mounting pieces 1323 and the first horizontal mounting pieces 1324 are configured wherein a plurality of narrow long members are arranged in vertical and horizontal directions, thereby effectively surrounding various curved faces of the ball of the footwear 2 according to their respective positions, such that they come into close contact with the ball of the footwear 2. Of course, this causes the consumption quantity of the material for making them to be desirably saved.

[52] The first vertical mounting pieces 1323 are fixed at the lower end to the first supporter 1322 in such a manner as to be protruded upwardly to a given length, and at this time, they should have such the given length as not to deviate the ball of the footwear 2 upwardly therefrom, even though a force is applied to the footwear 2.

[53] The first horizontal mounting pieces 1324, which are fixed horizontally to a given height to the first vertical mounting pieces 1323, are an arch-like shape extended to a given length in left and right directions, and at this time, they should have such the given length as not to deviate the ball of the footwear 2 to left and right sides therefrom, even though a force is applied to the footwear 2.

[54] In this case, the first horizontal mounting pieces 1324 are fixed at given intervals to the first vertical mounting pieces 1323, thereby allowing the ball of the footwear 2 to come into close contact therewith in a more stable manner.

[55] Moreover, the first vertical mounting pieces 1323 and the first horizontal mounting pieces 1324 are provided with a plurality of sliding-prevention protrusions 1326 formed in various shapes on the inner contacted surfaces abutting with the outer surface of the footwear 2, for preventing the sliding caused by the friction with the ball surface of the footwear 2 mounted so as to allow the footwear 2 to be fixed to the ball- fixing means 13 in a more rigid manner.

[56] As shown in FIG.4, the lower side part 133 of the ball-fixing means 13 includes the fixing protrusions 1331 that are cooperatively coupled to the coupling grooves 131 formed on the front end to the footwear's front portion- supporting stand 111, thereby coupling the ball-fixing means 13 with the footwear's front portion-supporting stand 111.

[57] According to the first embodiment of the present invention, the coupling grooves

131 are indented backwardly to a given length from the front face of the front end portion of the footwear's front portion-supporting stand 111 and have the corresponding number to the fixing protrusions 1331 of the ball-fixing means 13, thereby making the areas coupled with the fixing protrusions 1331 extended to allow the fixing protrusions 1331 to be fixed to the footwear's front portion- supporting stand 111 in a more rigid manner.

[58] According to the first embodiment of the present invention, the fixing protrusions

1331 are protruded horizontally to the backward direction of the ball-fixing means 13, having the same width and length as the coupling grooves 131, thereby achieving the complete insertion into the coupling grooves 131, such that the ball-fixing means 13 is rigidly fixed to the footwear's front portion- supporting stand 111, without any movement.

[59] In this case, the fixing protrusions 1331 and the coupling grooves 131 have a plurality of fixing holes 1312 and 1327 pierced on the same positions corresponding to each other upon coupling, such that they are rigidly coupled by means of a fastening member 150 like a bolt or a rivet fixedly inserted into the fixing holes 1312 and 1327.

[60] The fixing holes 1312 and 1327 are desirably formed one or more on the both sides of the fixing protrusions 1331 and the coupling grooves 131, which makes the fixing protrusions 1331 and the coupling grooves 131 coupled in a more rigid manner. [61] In this case, the fixing protrusions 1331 and the coupling grooves 131 that are formed according to the first embodiment of the present invention may be placed reversely thereto at the footwear's front portion- supporting stand 111 and the ball- fixing means 13.

[62] On the other hand, according to the roller devices 1 and 1', since general kinds of footwear 2 is mounted, the ball thickness of the footwear 2 may be varied according to the kinds of footwear, and therefore, so as to compensate for the thickness to be varied, the ball-fixing means 13 should abut tightly with the ball of the footwear 2, irrespective of the thickness of ball of the footwear 2.

[63] As shown in FIG.5, thus, there is provided a height-adjusting member 160 on the coupling grooves 131 and the fixing protrusions 1331, which includes a plurality of height- adjusting grooves 131 of the coupling grooves 1311 and a plurality of height- adjusting protrusions 1325 of the fixing protrusions 1331, the height-adjusting grooves 1311 adapted to insert the height- adjusting protrusions 1325 thereinto. Unlike this manner, the height- adjusting grooves 1311 of the coupling grooves 131 and the height- adjusting protrusions 1325 of the fixing protrusions 1331 may be formed reversely to the positions as mentioned above.

[64] An explanation of the construction of the height- adjusting member 160 will be given with reference to FIG.5. Each of the coupling grooves 131 has the plurality of height- adjusting grooves 1311 formed in a lengthwise direction on the both inner sides thereof in such a manner as to be spaced up and down from one another at given intervals, and each of the fixing protrusions 1331 has the plurality of height- adjusting protrusions 1325 formed correspondingly to the height- adjusting grooves 1311 in a lengthwise direction on the both outer sides thereof in such a manner as to be spaced up and down from one another at given intervals. When the fixing protrusions 1331 are inserted into the coupling grooves 131, the height- adjusting protrusions 1325 are slidingly inserted at a given height into the height- adjusting grooves 1311 at the both sides thereof, such that the height of the fixing protrusions 1331 fixed to the coupling grooves 131 is adjusted.

[65] In other words, at the state where the ball-fixing means 13 is separated from the footwear's front portion-supporting stand 111 if the low side height-adjusting protrusions 1325 formed on the both outer sides of the fixing protrusions 1331 of the ball-fixing means 13 are inserted into the upper side height- adjusting grooves 1311 of the coupling grooves 131, the first supporter 1322, the first vertical mounting pieces 1323, and the first horizontal mounting pieces 1324 of the ball- fixing means 13 at which the ball portion of the footwear is mounted are raised in position, thereby allowing the footwear having a relatively high thickness at the ball portion thereof to be conveniently mounted thereon. [66] To the contrary, in a case where the footwear has a relatively low thickness at the ball portion thereof, if the upper side height- adjusting protrusions 1325 formed on the both outer sides of the fixing protrusions 1331 of the ball-fixing means 13 are inserted into the lower side height- adjusting grooves 1311 of the coupling grooves 131, the ball-fixing means 13 is lowered in position, thereby allowing the footwear having a relatively low thickness at the ball portion thereof to be conveniently mounted thereon.

[67] In this case, the fixing holes 1312 and 1327 on the coupling grooves 131 an the fixing protrusions 1331 are pierced at the positions where the height- adjusting grooves 1311 and the height- adjusting protrusions 1325 are formed, such that after the height of the ball-fixing means 13 is adjusted the ball-fixing means 13 is maintained at its fixed height, without any change in the height, while being rigidly fixed to the footwear's front portion- supporting stand 111.

[68] The fastening member 150 adapted to be inserted into the fixing holes 1312 and

1327 is formed desirably of a bolt or a pin for allowing the ball-fixing means 13 to be detachably mounted on the footwear's front portion-supporting stand 111 with ease.

[69] FIG.7 shows the detailed configuration of the heel-fixing means 14 of the roller device according to the first embodiment of the present invention. As shown, the upper side part 142 of the heel-fixing means 14 includes a second supporter 1422 having an arch-like shape and forming a lower end portion of the heel-fixing means 14; one or more second vertical mounting pieces 1423 having the same vertically curved face as the heel of the footwear 2 in such a manner as to be protruded upwardly to a given length from the top side of the second supporter 1422 to allow the top end of the heel of the footwear 2 to come into close contact therewith in a vertical direction; and one or more second horizontal mounting pieces 1424 having the same horizontally curved face as the heel of the footwear 2 in such a manner as to be fixed to a given height at the second vertical mounting pieces 1423 to allow the top end of the heel of the footwear 2 to come into close contact therewith in a horizontal direction.

[70] The second supporter 1422 has the second vertical mounting pieces 1423 rigidly fixed thereto, such that even though a force is applied to the footwear 2, the second vertical mounting pieces 123 are kept at their fixed position.

[71] In this case, the second supporter 1422, which is placed at the rear end of each of the roller devices 1 and 1', has an arch-like shape, thereby making the friction with air during skating greatly reduced and allowing the damages or deformation caused by obstacles to be substantially suppressed.

[72] The second vertical mounting pieces 1423 and the second horizontal mounting pieces 1424, which are the parts coming into close contact with the heel of the footwear 2, are formed of a soft material, such that even though a force is applied to the footwear 2, they serve to fix the heel of the footwear 2, without having any de- formation in its original shape.

[73] In this case, the second vertical mounting pieces 1423 and the second horizontal mounting pieces 1424 are spaced apart from one another at given intervals, desirably for fixing the heel of the footwear 2 in a more stable manner.

[74] Further, the second vertical mounting pieces 1423 and the second horizontal mounting pieces 1424 are configured wherein a plurality of narrow long members are arranged in vertical and horizontal directions, thereby effectively surrounding various curved faces of the heel of the footwear 2 according to their respective positions, such that they come into close contact with the heel of the footwear 2. Of course, this causes the consumption quantity of the material for making them to be desirably saved.

[75] The second vertical mounting pieces 1423 are fixed at the lower end to the second supporter 1422 in such a manner as to be protruded upwardly to a given length, and at this time, they should have such the given length as not to deviate the heel of the footwear 2 upwardly therefrom, even though a force is applied to the footwear 2.

[76] The second horizontal mounting pieces 1424, which are fixed horizontally to a given height to the second vertical mounting pieces 1423, are an arch-like shape extended to a given length in left and right directions, and at this time, they should have such the given length as not to deviate the heel of the footwear 2 to left and right sides therefrom, even though a force is applied to the footwear 2.

[77] In this case, the second horizontal mounting pieces 1424 are fixed at given intervals to the second vertical mounting pieces 1423, thereby allowing the heel of the footwear 2 to come into close contact therewith in a more stable manner.

[78] Moreover, the second vertical mounting pieces 1423 and the second horizontal mounting pieces 1424 are provided with a plurality of sliding-prevention protrusions 1425 formed in various shapes on the inner contacted surfaces abutting with the outer surface of the footwear 2, for preventing the sliding caused by the friction with the heel surface of the footwear 2 mounted to allow the footwear 2 to be fixed to the heel-fixing means 14 in a more rigid manner.

[79] According to the roller devices 1 and 1 of the present invention, the lower side part

143 of the heel-fixing means 14 includes the moving body 1421, the springs 145, and the cover 144.

[80] The moving body 1421 is slidably inserted into the sliding groove 1411 formed on the footwear's rear portion- supporting stand 112, and the sliding groove 111 is formed at a given depth by a given length from the rear end and to the front end on the top surface of the footwear's rear portion- supporting stand 112. Thereby, the footwear's rear portion-supporting stand 112 is opened at the rear and top sides thereof so as to insert the moving body 1421 thereinto. The sliding groove 1411 has the fastening protrusions 1412 protruded to a given height from the bottom surface on the inner rear side thereof, for fixing the spring 145 thereto.

[81] The moving body 1421 has the same width and length as the sliding groove 1411 in such a manner as to be inserted into the sliding groove 1411 in a close contacting relation thereto, without any fluctuation during skating.

[82] The moving body 1421 has the guide longitudinal holes 1426 formed in the middle portion thereof, and each of the guide longitudinal holes 1426 is opened in the upward and downward directions and closed in the forward and backward directions, such that it has the spring 145 inserted thereinto. At this time, each of the guide longitudinal holes 1426 has a second spring supporting protrusion 1427 formed on the front face thereof for fixing the front end of the spring 145 thereto.

[83] At the state where the moving body 1421 has been inserted into the sliding groove

1411 of the footwear's rear portion-supporting stand 112, the springs 145 are inserted into the guide longitudinal holes 1426, while being coupled at the front ends thereof with the second spring supporting protrusions 1427 and coupled at the rear ends thereof with the first spring supporting protrusions 1414 of the fastening protrusions

1412 formed on the bottom face of the sliding groove 1411 of the footwear's rear portion-supporting stand 112. Each of the springs 145 has the same as or shorter than the distance between the first spring supporting protrusion 1414 and the second spring supporting protrusion 1427 of the fastening protrusion 1412 at the state where the moving body 1421 is completely inserted into the sliding groove 1411. In this case, at the state where the moving body 1421 is completely inserted into the sliding groove 1411 if the moving body 1421 is pulled backwardly, the spring 145 is compressed to allow the moving body 1421 to pull forwardly.

[84] So as to mount the footwear 2 on each of the roller devices 1 and 1' of the present invention, first, the ball of the footwear 2 is fixed to the ball-fixing means 13 of the footwear's front portion-supporting stand 111, and then, the moving body 1421 is pulled backwardly to make the heel of the footwear 2 placed having a sufficient space at the inside of the heel-fixing means 14 of the footwear's rear portion- supporting stand 112. Next, if the force applied to the moving body 1421 becomes slight, the moving body 1421 is pulled forwardly again by the elasticity of the springs 145 to compress the heel of the footwear 2. Thereby, the footwear 2 can be fixed to each of the roller devices 1 and 1' in a more stable and rigid manner.

[85] The cover 144 is fixedly disposed on the upper sides of the moving body 1421 having the springs 145 inserted thereinto and the footwear's rear portion-supporting stand 112, while being fixed at one side thereof to the front portion of the footwear's rear portion-supporting stand 112 and fixed at the other side thereof to the fastening protrusions 1412 inserted into the guide longitudinal holes 1426 of the moving body 1421, such that the moving body 1421 is slidably coupled with the footwear's rear portion-supporting stand 112.

[86] FIGS.8 and 9 show the rotary structure of the ball-fixing means 13 and the heel- fixing means 14, wherein the ball-fixing means 13 of each of the roller devices 1 and 1 according to the second embodiment of the present invention includes a first fixing body 510 formed at the lower side part 133 in such a manner as to be fixed to the first supporter 1322 and having a first coupling end 512 with a first insertion hole 530 pierced thereon, the first insertion hole 530 adapted to insert a rotary shaft 560 thereinto. Further, the fixing protrusions 1331 has a second coupling end 514 with a second insertion hole 540 pierced thereon, the second insertion hole 540 adapted to insert the rotary shaft 560 thereinto. Thereby, the first coupling end 512 and the second coupling end 514 are hinge-coupled by means of the rotary shaft 560. The rotary shaft 560 can be formed of a rivet or pin.

[87] Also, the upper side part 132 of the ball-fixing means 13 has a larger width than the footwear's front portion-supporting stand 111, such that it can be rotated backwardly with respect to the fixing protrusions 1331 fixed on the footwear's front portion- supporting stand 111.

[88] In this case, the first coupling end 512 and the second coupling end 514 come into close contact with each other through the contacted faces at their lower end, thereby preventing the ball-fixing means 13 from being rotated in a forward direction of the footwear's front portion-supporting stand 111.

[89] Further, a torsion spring 550 that is bent to the back of the footwear's front portion- supporting stand 111 is fixed to the first fixing body 510 and the fixing protrusions 1331, thereby allowing the ball-fixing means 13 to always be pulled to the top side of the footwear's front portion- supporting stand 111, such that the ball of the footwear 2 is compressed and fixed to the footwear's front portion- supporting stand 111 in a more rigid manner.

[90] The heel-fixing means 14 of the roller device according to the second embodiment of the present invention is rotated in the same structure as the ball-fixing means 13, which is as follows.

[91] The heel-fixing means 14 includes a second fixing body 520 formed at the lower side part 133 in such a manner as to be fixed to the second supporter 1422 and having a third coupling end 522 with a third insertion hole 530' pierced thereon, the third insertion hole 530' adapted to insert a rotary shaft 560 thereinto. Further, the moving body 1421 of the heel-fixing means 1 has a fourth coupling end 514 with a fourth insertion hole 540' pierced thereon, the fourth insertion hole 540' adapted to insert the rotary shaft 560 thereinto. Thereby, the third coupling end 522 and the fourth coupling end 524 are hinge-coupled by means of the rotary shaft 560.

[92] Also, the upper side part 142 of the heel-fixing means 14 has a larger width than the footwear's rear portion- supporting stand 112, such that it can be rotated forwardly with respect to the moving body 1421 fixed on the footwear's rear portion-supporting stand 112.

[93] In this case, the third coupling end 522 and the fourth coupling end 524 come into close contact with each other through the contacted faces at their lower end, thereby preventing the heel-fixing means 14 from being rotated in a backward direction of the footwear's rear portion- supporting stand 112.

[94] Further, a torsion spring 550 that is bent to the front of the footwear's rear portion- supporting stand 112 is fixed to the second fixing body 520 and the moving body 1421, thereby allowing the heel-fixing means 14 to always be pulled to the top side of the footwear's rear portion- supporting stand 112, such that the heel of the footwear 2 is compressed and fixed to the footwear's rear portion-supporting stand 112 in a more rigid manner.

[95] As mentioned above, as the ball-fixing means 13 and the heel-fixing means 14 are rotated to the inside of the footwear 2 to come into close contact with the top surfaces of the footwear front and rear-supporting stands 111 and 112, they are protected from the collision with outside objects or the application of external forces thereto, without any damage or deformation.

[96] On the other hand, as shown in FIGS.3, 5 and 6, the adjusting means 113 which includes a length-adjusting hole 114, a length-adjusting bar 115, an adjusting bar- fixing part 116, and a releasing prevention part 117, serves to adjust the spaced distance between the footwear's front portion-supporting stand 111 and the footwear's rear portion-supporting stand 112 in accordance with the sizes of footwear.

[97] At this time, as shown in FIG.5, the length-adjusting hole 114 is formed to a given depth on the lower body of the footwear's front portion- supporting stand 111 in such a manner as to have a shape of a generally square post and an opening at the rear side facing the footwear's rear portion-supporting stand 112. The length-adjusting bar 115 is formed of a rectangular post-like shape protruded to a given length from the front side of the footwear's rear portion- supporting stand 112 in such a manner as to be inserted into the length-adjusting hole 11, and includes a plurality of position-fixing protrusions 1151 spaced apart from one another at given intervals on the bottom face thereof.

[98] Also, as shown in FIGS.5 and 6, the adjusting bar-fixing part 116 has a ^|J '-like body that is mounted rotatably by means of a pin on the lower body of the footwear's front portion- supporting stand 111 at the central portion thereof, and it includes: a fixing lever 1161 having a pressurizing member 1163 disposed at the lower side thereof in such a manner as to be pressed by a user and having a locking groove 1164 formed on the top end portion thereof in such a manner as to insert each of the plurality of position-fixing protrusions 1151(see FIG.3) of the length-adjusting bar 115 thereinto; and an elastic member 1162 adapted to rigidly fix the locking groove 1164 of the fixing lever 1163 to the inserted position-fixing protrusion 1151. The elastic member 1162 is formed of a torsion spring that is inserted at the central portion thereof by means of a pin in such a manner as to be fixed at one end thereof to the lower body of the footwear's front portion- supporting stand 111 and fixed at the other hand thereof to the inner face of the fixing lever 1161.

[99] On the other hand, the releasing prevention part 117 serves to lock the adjusting bar- fixing part 116 such that the length-adjusting bar 115 fixed by the adjusting bar- fixing part 116 is kept rigidly at its fixed state, and it includes: a deviation-preventing groove 1171 formed on the rear face of the fixing lever 1161; a deviation-preventing member 1172 inserted and deviated into/from the deviation-preventing groove 1171; a supporting pin 1173 for supporting the deviation-preventing member 1172 on the footwear's front portion-supporting stand 111; and an elastic member 1174 for applying a fixing force to the deviation-preventing member 1172. In this case, the deviation-preventing member 1172 includes a body having a fixing protrusion 1175 formed at one side thereof in such a manner as to be inserted and deviated into/from the deviation-preventing groove 1171 to selectively stop the rotation of the fixing lever 1161, a spring-mounting groove 1176 formed at the other side thereof, and a pressurizing groove 1179 having a plurality of sliding prevention grooves formed on the bottom face thereof, the body of the deviation-preventing member 1172 having a longitudinal pin-moving hole 1178 passed through the both sides thereof. And, the supporting pin 1173 is mounted horizontally through the pin-moving hole 1178 of the deviation-preventing member 1172 to movably support the deviation-preventing member 1172 on the lower body of the footwear's front portion- supporting stand 111. The elastic member 1174 is elastically inserted on the spring-mounting groove 1176 for applying the advancing force to the fixing lever 1161 to the deviation-preventing member 1172, such that the fixing protrusion 1175 is forcedly inserted into the deviation-preventing groove 1171.

[100] On the other hand, as shown in FIG.7, the rear side wheel- supporting stand 20 of the footwear's rear portion- supporting stand 112 has a brake assembly 18 adapted to brake the skating operation of each of the roller devices 1 and 1', the brake assembly 18 including: a brake supporter 181 formed integrally at the rear side wheel- supporting stand 20; a brake-mounting part 182 coupled to the brake supporter 181; and a friction pad 183 formed on the rear side of the brake-mounting part 182 in such a manner as to frictionally abut against the wheel 12. At this time, the brake assembly 18 is adjustable in height in accordance with the diameter of the wheel 12 mounted on the rear side wheel-supporting stand 20. That is, the brake-mounting part 182 has a plurality of height- adjusting grooves 1822 formed longitudinally at given up and down intervals on the outer side thereof and has fastening holes 1823 formed in upward and downward directions. The brake supporter 181 has a plurality of height-adjusting protrusions 1812 formed at given up and down intervals at one inner face thereof in such a manner as to be inserted into the height- adjusting grooves 1822 for the insertion with the brake- mounting part 182 and has coupling holes 1813 for inserting a fastening member adapted to be inserted into the fastening holes 1823 of the brake-mounting part 182. Under the above-mentioned construction, various sizes of wheels can be exchanged.

[101] In a case where the outer diameters of the wheels 12 mounted on the rear side wheel-supporting stand 20 of the footwear's rear portion- supporting stand 112 are increased or decreased, the height of the brake assembly 18 should be adjusted for its braking operation while a wearer is skating. At this time, the coupled height between the height- adjusting protrusions 1812 of the brake supporter 181 and the height- adjusting grooves 1822 of the brake-mounting part 182 is adjusted to allow the height of the friction pad 183 to be appropriately adjusted, such that the braking operation is carried out during skating, thereby ensuring safe skating.

[102] FIG.12 is a side view showing a roller device for mounting footwear thereon according to a third embodiment of the present invention, and FIG.13 is an exploded view showing a structure capable of reducing the impacts applied through wheels in FIG.12.

[103] In the roller device 1' for mounting footwear thereon according to the third embodiment of the present invention, each of the front side wheel-supporting stand 19 and the rear side wheel-supporting stand 20 includes the wheel-locking frame 200, the locking groove part 230, the spring 220, and the holding plate 250. In this case, the wheel-locking frame 200 has the shaft 122 disposed on the lower portion thereof for coupling with the wheels 12 at both sides thereof and the pocket boss 204 protruded vertically on the top portion thereof. The pocket boss 204 has the hollow hole 206 formed in the middle portion thereof and has the stoppers 208 formed protruded outwardly at the outer face of the top side thereof. The locking groove part 230 is formed on the lower surface of each of the footwear's front portion-supporting stand 111 and the footwear's rear portion-supporting stand 112 in such a manner as to slidably insert the pocket boss 204 of the wheel-locking frame 200 upwardly and downwardly thereinto and has the cut-off hole 234 formed at both side portions thereof for slidably inserting the stoppers 208 thereinto. The spring 220 is inserted supportably at one side thereof into the hollow hole 206 of the pocket boss 204 and at the other side thereof into the locking groove part 230, for applying an elastic force to the wheel- locking frame 200 in a downward direction with respect to each of the footwear's front portion-supporting stand 111 and the footwear's rear portion-supporting stand 112. The holding plate 250 is disposed at the lower side of the locking groove part 230 in such a manner as to be coupled to each of the footwear's front portion- supporting stand 111 and the footwear's rear portion- supporting stand 112 for blocking the lower side of the cut-off hole 234, thereby supporting the stoppers 208 of the wheel-locking frame 200 such that the wheel-locking frame 200 is supported by each of the footwear's front portion-supporting stand 111 and the footwear's rear portion-supporting stand 112. At this time, the spring 220 is desirably formed of a coil spring and is effectively fixed by means of a support boss 210 formed on the bottom surface of the pocket boss 204 of the wheel-locking frame 200 and a support boss 230 formed in the locking groove part 230 correspondingly to the support boss 210. Further, the spring 200 has a rubber packing member 224 formed on the both sides thereof for preventing the generation of the metal noises therefrom.

[104] On the other hand, the rear side wheel-supporting stand 20 further includes a tilting prevention bar 192 and an insertion groove 194 formed on the lower side of the footwear's rear portion- supporting stand 112, for effectively preventing the rear side wheel-supporting stand 20 from being tilted backwardly. Thus, the tilting prevention bar 192 is formed protruded upwardly from the rear side of the wheel-locking frame 200, and the insertion groove 194 is formed on the rear side of the locking groove part 230 for inserting the tilting prevention bar 192 thereinto.

[105] Additionally, a band 30 is mounted for rolling the insteps of the wearer, which makes the footwear completely fixed. The band 30 serves to allow the wearer's foot to come into close contact with the roller device of the present invention, together with the parts as mentioned above having impact-absorbing effects, thereby improving the safety effects during the use of the roller device.

[106] In the roller device 1' according to the third embodiment of the present invention, the impact applied to the wheels 12 from the rear side wheel- supporting stand 20 is absorbed through the spring 220, thereby preventing the impact applied to the wheels 12 from being transmitted to a wearer's ankle. In other words, as the wheels 12 are coupled to the both sides of the shaft 122, if an impact is applied to the wheels 12, it is transmitted through the shaft 122 to the wheel-locking frame 200. At this time, since the wheel-locking frame 200 is kept pushed by means of the spring 220, the impact transmitted to the wheel-locking frame 200 is applied to the spring 220, but it is absorbed by means of the buffering of the spring 220. At this time, since the stopper 208 of the wheel-locking frame 200 is supported by the holding plate 250 in the cut-off hole 234, the impacts applied continuously to the wheel-locking frame 200 can be buffered by means of the spring 220.

[107] While a roller device for mounting footwear thereon according to the present invention has been described with reference to the particular illustrative embodiments and drawings, it is merely illustrative and not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention. Industrial Applicability As described above, there is provided a roller device for mounting footwear thereon according to the present invention wherein the footwear can be rigidly fixed by means of the ball and heel-fixing means, without having separate fixing device, thereby allowing various sizes of general footwear to be easily mounted thereon.

Claims

[1] A roller device for mounting footwear thereon having a footwear's front portion- supporting stand (111) disposed coming into close contact with a front portion of the footwear (2), a footwear's rear portion- supporting stand (112) disposed coming into close contact with a rear portion of the footwear (2), the footwear's front portion- supporting stand (111) and the footwear's rear portion- supporting stand (112) being disposed in a lengthwise direction thereof, and front and rear wheel-supporting stands (19 and 20) with wheels (12) rotatably coupled thereto disposed on the lower ends of the footwear's front portion-supporting stand (111) and the footwear's rear portion- supporting stand (112), the roller device comprising: a ball-fixing means (13) having an upper side part (132) having an inner surface adapted to closely surround the ball portion of the footwear (2) and a lower side part (133) coupled to the footwear's front portion-supporting stand (111) in such a manner as to make the upper side part (132) protruded upwardly from the front end portion of the footwear's front portion-supporting stand (111); and a heel-fixing means (14) having an upper side part (142) having an inner surface adapted to closely surround the heel portion of the footwear (2) and a lower side part (143) coupled to the footwear's rear portion- supporting stand (112) in such a manner as to make the upper side part (142) protruded upwardly from the rear end portion of the footwear's rear portion- supporting stand (112), wherein one of the ball-fixing means (13) and the heel-fixing means (14) is moved forwardly or backwardly to allow the footwear (2) to be detachably mounted on the roller device.

[2] The roller device according to claim 1, wherein the footwear's front portion- supporting stand (111) has coupling grooves (131) formed backwardly indented from the front face of the front end portion thereof, and the ball-fixing means (13) has fixing protrusions (1331) formed coupled with the coupling grooves (131) at the lower side part thereof, the coupling grooves (131) and the fixing protrusions (1331) having a plurality of fixing holes (1312 and 1327) formed thereon for placing the coupling grooves (131) and the fixing protrusions (1331) at the same position when coupled with each other, thereby fixing the footwear's front portion- supporting stand (111) and the ball-fixing means (13) to each other by means of pin-coupling through the fixing holes (1312 and 1327).

[3] The roller device according to claim 2, wherein the footwear's front portion- supporting stand (111) and the ball-fixing means (13) are coupled to each other at the inner side of the coupling grooves (131) and at the outer side of the fixing protrusions (1331) and further comprise a plurality of height- adjusting members (160) formed at same intervals in upward and downward directions, such that the up and down coupling positions of the ball-fixing means (13) is adjusted in accordance with the ball height of the footwear (2) to be mounted thereon.

[4] The roller device according to any one of claims 1 to 3, wherein the footwear's rear portion-supporting stand (112) comprises: a sliding groove (1411) formed on the top surface thereof in such a manner as to be opened backwardly and upwardly; and fastening protrusions (1412) formed at the inner rear sides of the sliding groove (1411), and the heel-fixing means (14) comprises: a moving body (1421) disposed at the lower side part (143) thereof in such a manner as to be slidably inserted into the sliding groove (1411), the moving body (1421) having guide longitudinal holes (1426) formed at the inside thereof to have a length extended forwardly from the rear ends of the fastening protrusions (1412) in such a manner as to slidably insert the fastening protrusions (1412) therealong; springs (145) adapted to be inserted into the guide longitudinal holes (1426) of the moving body (1421) in such a manner as to be supported at the rear ends by means of the fastening protrusions (1412) for applying an elastic force to the moving body (1421); and a cover (144) disposed on the upper portion of the moving body (1421) for sliding the moving body (1421) into the sliding groove (1411) in such a manner as to be coupled to the footwear's rear portion-supporting stand (112) for covering the top surface of the sliding groove (1411), wherein at the state where the ball-fixing means (13) is fixed, the heel-fixing means (14) is moved to detachably mount the footwear (2) on the roller device.

[5] The roller device according to claim 4, wherein the ball-fixing means (13) is formed having the upper side part (132) having a larger width than the footwear's front portion- supporting stand (111) and hinge-coupled with the lower side part (133) in such a manner as to be rotated backwardly with respect to the lower side part (133), such that the ball-fixing means (13) is bent to the upper side of the footwear's front portion-supporting stand (111) to come into close contact therewith, and the heel-fixing means (14) is formed having the upper side part (142) having a larger width than the footwear's rear portion- supporting stand (112) and hinge-coupled with the lower side part (143) in such a manner as to be rotated forwardly with respect to the lower side part (143), such that the heel- fixing means (14) is bent to the upper side of the footwear's rear portion- supporting stand (112) to come into close contact therewith.

[6] The roller device according to claim 4, wherein each of a front side wheel- supporting stand (19) and a rear side wheel-supporting stand (20) comprises: a wheel- locking frame (200) having a shaft (122) disposed on the lower portion thereof for coupling with the wheels (12) at both sides thereof, a pocket boss (204) protruded vertically on the top portion thereof in such a manner as to have a hollow hole (206) formed in the middle portion thereof, and stoppers (208) formed protruded outwardly at the outer face of the top side of the pocket boss (204); a locking groove part (230) formed on the lower surface of each of the footwear's front portion- supporting stand (111) and the footwear's rear portion- supporting stand (112) in such a manner as to slidably insert the pocket boss (204) of the wheel-locking frame (200) upwardly and downwardly thereinto and having a cut-off hole (234) formed at both side portions thereof for slidably inserting the stoppers (208) thereinto; a spring (220) inserted supportably at one side thereof into the hollow hole (206) of the pocket boss (204) and at the other side thereof into the locking groove part (230), for applying an elastic force to the wheel-locking frame (200) in a downward direction with respect to each of the footwear's front portion- supporting stand (111) and the footwear's rear portion- supporting stand (112); and a holding plate (250) disposed at the lower side of the locking groove part (230) in such a manner as to be coupled to each of the footwear's front portion- supporting stand (111) and the footwear's rear portion- supporting stand (112) for blocking the lower side of the cut-off hole (234), thereby supporting the stoppers (208) of the wheel-locking frame (200) such that the wheel-locking frame (200) is supported by each of the footwear's front portion-supporting stand (111) and the footwear's rear portion-supporting stand (112).