KR100512023B1 - A roller shoes installed driving equipment - Google Patents

Abstract

The present invention relates to a roller shoe having a drive device.

In particular, the shoe body having a roller mounting hole in the front and rear of the bottom portion;

Rollers are mounted to each of the accommodating portion is divided so as to accommodate the rollers;

A roller connection part for dividing the rollers to receive and expose the rollers;

A roller support part installed to allow the storage and exposure of the roller by an operation of a knob protruding from one side of the shoe body;

And a power transmission unit installed to rotate the rollers by the power supply of the power supply unit.

Accordingly, the rollers can be mounted in a minimum space, so that the rollers can be mounted on general shoes and various casual shoes, and the rollers can be easily stored and discharged by the operation of the knob. It can be rotated.

Description

Roller shoes installed driving equipment

The present invention relates to a roller shoe having a driving device, and more particularly, a shoe body having a roller mounting hole in front and rear of a bottom portion thereof, and a roller and a roller which are divided and installed to be accommodated in the roller mounting hole, respectively. To rotate and rotate the rollers by a roller support part, a power supply part, and a power source of the power supply part, which are installed to allow the storage and exposure of the rollers by the operation of the roller connecting part and the knob protruding from one side of the shoe body. The present invention relates to a roller shoe having a driving device that allows a roller to be easily mounted on an exclusive shoe or sneaker, shoes, casual shoes, etc., and allows the roller to be driven by external power.

In general, rollers are used to be freely mounted on industrial carriers such that rubber wheels can be rotated freely on shafts by sliding bushes or rolling balls, but in recent years, the rollers have been improved. It can be mounted on shoes or special shoes to move the road at high speed.

However, the rollers as described above have a disadvantage in that they are fixed integrally in a state exposed to shoes and the like and cannot be used for general shoes.

In order to make up for such drawbacks, a shoe having a roller having the function of a shoe and a roller at the same time is disclosed in Korean Utility Model Publication No. 175921, the configuration of which is described in FIG. A pair of recesses 12 and 13 is formed at the front and rear sides of the recess 11, and the recessed brackets 21 and 34 are provided in the recesses 12 and 13, respectively. 21 and 34 are provided with actuating brackets 23 and 32 which are rotatable as hinge shafts 22 and 33, respectively.

The operating brackets (23) and (32) are provided with a front and rear rollers (20) and (30) by rotating shafts to be rolled, and at the same time, the support shafts at predetermined positions at the rear end of the operating brackets (23) and (32). 25, and having coil springs 26 and 36 between the fixing brackets 21 and 34,

The support shaft 25 of the front operation bracket 23 is fastened by a spring 29 and is provided with a stopper 28 having a locking jaw 27 to brake the rotation operation of the operation bracket while being slide-operated. have.

However, in the shoe having the roller as described above, when mounting the front and rear rollers (20, 30), grooves 12, 23 having a predetermined depth should be formed in the sole 11, general shoes It is difficult to install the inside, and can be selectively mounted only in high-heeled sneakers or shoes, and the front and rear rollers (20, 30) during the discharge and storage of the rollers by the user's hands by rotating the bracket mounted on the roller storage And it is difficult to quickly operate as to be discharged, as well as has the disadvantage of contaminating the hand.

In addition, the shoe provided with the roller as described above, so as to be driven only by the user's artificial force or by the inclination of the ground was inconvenient and had to apply a continuous force in continuous use.

In order to solve the above problems, a motor-driven inline skate is disclosed in Korean Laid-Open Patent Publication No. 02-65462, and the configuration thereof is as shown in FIGS. 2A and 2B. Frames 53 are arranged in a row in which the two wheels 52 are arranged in a line, and a rechargeable battery 54 is installed in a part of the shoe 51, and a connector 55 for inputting external power on the rear axle. ) And an on-off switch 56 is installed, and the fixing plate 59 is fixedly installed by two wheel shafts 57 and a fixing plate support bar 58 at the rear of each of the two outer sides of the rear portion of the frame 53. The friction driving device 60 is pivotally mounted to the pivot shaft 61 such that the friction driving wheel 65 installed on the driving shaft 67 is in contact with the wheel 52 installed at the rear of the frame 53 on the upper portion of the 59. And a fixing plate 59 and a friction type driving device under the fixing plate 59. A driving force holding device 62 for connecting 60 is installed.

In addition, the drive device 60 is a friction drive wheel 654 is installed on the housing 64, the motor housing support rod 63 is installed, the drive shaft 67 is provided with a driven pulley 66 at one end is connected. The motor 69, in which the driving pulley 68 is installed on the rotating shaft, is fixed by the clamp 70, and the driving pulley and the projection belt 71 are fastened to each other.

However, the motor-driven inline skate as described above also maintains the state in which the wheels are exposed to the outside of the shoe, and its practical value as a daily sporadic is extremely limited, and its use is inconvenient due to its inconvenience. The disadvantage is that it is difficult to carry and increase.

An object of the present invention for improving this, it is possible to mount the roller in the bottom space of the sole bottom portion to minimize the thickness of the sole portion to enable the mounting of the roller in shoes, casual shoes, shoes and the like.

In addition, the storing and discharging process of the rollers also allows the rollers to be easily stored and discharged by pressing the knob with the opposite foot without bending the waist, and a safety device for placing the anti-rotation jaw on the knobs to prevent the rollers from being relaxed by external factors. It is installed to keep the body center during walking and driving, and to prevent other interference.

In addition, the present invention provides a roller shoe having a driving device that connects a driving motor driven by a power supply to a roller so that the roller is automatically driven by an external power source to minimize fatigue of use.

In order to achieve the above objects, the shoe body having a roller mounting hole in the front and rear of the bottom portion;

Rollers are mounted to each of the accommodating portion is divided so as to accommodate the rollers;

A roller connection part for dividing the rollers to receive and expose the rollers;

A roller support part installed to allow the storage and exposure of the roller by the operation of a knob protruding from one side of the shoe body;

Power supply; and,

There is provided a roller shoe having a driving device including a power transmission portion installed to rotate the roller by a power supply of the power supply portion.

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

As shown in Figure 3 to 10, the present invention, the shoe body 100 and the roller 200, the roller connecting portion 300 and the roller support portion 400, and the power supply 500 and the power transmission unit 600 Is done as.

The shoe body 100 has roller mounting holes 130 and 140 respectively formed in front and rear of the shoe sole 120, and a plurality of switch scaffolds 150 for driving a motor therein are provided at a contact portion of the toe. Is installed, the switch scaffold 150 is electrically connected to the terminal connector 160 is installed on one side of the shoe sole 120.

The rollers 200 are respectively mounted in the roller mounting holes 130 and 140 and are symmetrically installed so as to be accommodated therein. Springs are provided on the hinge shafts 230 respectively installed in the roller mounting holes 130 and 140. It is coupled to one side of the bracket 210 which is connected to the elastic rotation via the 220, the gear 200c for driving is integrally formed around one side of the contact surface of the roller 200.

In addition, a step 200a and a recess 200b into which the step enters are integrally formed around surfaces of the rollers 200 that are in close contact with each other.

In addition, the gear 200c and the gear combination 640 engaged therewith are formed in a triangular pyramid and a tapered shape so as to correspond to each other.

The roller connector 300 is connected to the gear combination 310a consisting of a plurality of gears such that the plurality of rollers 200 are exposed or received by rotating the bracket 210 in the forward and reverse directions, respectively.

In addition, a locking protrusion 340 having a locking groove 340a is installed at one side of the bracket 210, and a stopper 350 having a fixing groove 350a is disposed in the roller mounting hole to correspond to the locking protrusion 340. It is elastically installed via the spring (360) to (130) (140).

The roller support unit 400 is a gear combination by the knob 410 protruding on one side of the heel of the shoe body 100, the torque transmission means 420 connected to the knob 410, and the torque transmission means 420. It consists of a rotating shaft 430 for transmitting a rotational force to (310a).

In addition, the rotation shaft 430, the stopper 350 is integrally connected to both ends.

The rotation force transmitting means 420 transmits the rotational force of the knob in one direction while transmitting the ratchet wheel 420b and the one-way rotation of the ratchet wheel 420b to the rotation shaft 430. And made as a worm wheel (420c), the worm wheel is made of a configuration that the spring gear is integrally mounted on the inside.

In addition, a stopper driving means 450 for driving the stopper 350 is further provided, and the stopper driving means 450 is connected to the driving bar 450a connected to the knob 410 and the rotation shaft 430. It consists of a driven bar 450b and a rotating plate 450c to which the driven bar 450b and the driving bar 450a are integrally connected.

In addition, the knob 410 is installed so as to rotate in one direction while moving up and down, the outer knob installed in the form surrounding the knob 410 is installed to operate the hand to prevent detachment of the roller as the inside of the shoe body When the anti-rotation jaw 410a is integrally connected to the space formed in the rotating direction, the anti-rotation jaw is fixed to the bottom surface of the space and is fixed to prevent movement of the knob. The knob 410 is installed in a double manner. It is installed to move the drive bar (450a) by a rod connected to the downward movement and when pressed in the inside.

In addition, as shown in FIGS. 6A and 6B, a support surface 410a-1 in which a gear is not formed is formed on one side of the rack connected to the knob when the knob 410 is fully upward, and the knob 410 is a spring. 420b-1 is installed to be automatically upward when downward.

On the other hand, as shown in Figure 7, the roller 200, when mounted on a high heel, the roller 200 is raised and lowered by the rotational force transmitted by the rotating shaft 430 by the spring movement method.

The spring movement method, the spring 660c connected to the rotary shaft 430 and one end of the spring is connected to the rotational force transmission means 420 behind the shoe sole 120 and the roller 200 at the other end The lifting bracket 420d is connected, and the lifting bracket 420d is connected to the housing 480 via a spring 490a.

In addition, the bracket 420d also, the locking groove 340 is installed to be fixed and separated to the stopper 350 having a fixing groove to correspond to the locking groove 340.

The power supply unit 500 includes a fixing band 510 to which the magic tape 510a is attached to both ends of the user's calf or body and a battery 520 and the battery connected to the fixing band 510. It is made as a motor 530 that is fixed to one side of the fixed band 510 to operate by the power of the (520).

In addition, the motor 530 is integrally connected to the terminal connection protrusion 530a electrically connected to the terminal connector 160 so as to be controlled by the plurality of switch scaffold 150.

Power transmission unit 600 for transmitting the power of the power supply unit 500 to the roller 200 to rotate it, the power transmission piece 610 for transmitting the rotational force of the motor 530 to a certain distance and its Power connector 620 is connected to the end and the power connector 630 is installed in the shoe sole 120 to be connected to the power connector 620, the power connection piece 630 is engaged with the gear of the roller 200 finally It consists of a plurality of gear combinations 640 to mesh with (200c).

The power transmission piece 610 is selected from a plurality of rotary rods or power cables connected by a universal joint, the power connector 620, the power transmission piece 610 is installed on the inside to freely rotate the outside power The connector 620 and the rotary connection piece 610a are installed to be screwed together, and the screw 620a is formed on the rotary connector 610a and the power connector so as to correspond thereto.

In addition, the power connector 620 and the power transmission piece 610 is formed with a groove 620c at one end and a protrusion 620b at one end to correspond to each other.

On the other hand, in the case of high heels, the power transmission unit 600, the bevel gear 650 is connected to the power connector 620 and the bevel gear 660a is connected to the end thereof so as to engage the gear combination 660b of the other end Rotation rod 660 is installed to transmit power to the roller 200 by -1), and the rotation rod 660 has any one rod 660a connected to the elevating bracket 210 on the other. Of the rod 660b is installed so as to be movable.

In addition, one side of the hinge shaft 230 through which the spring 220 is interposed and a plurality of cover plates 260 separated through the gear combination 260a are connected to each other to accommodate the roller mounting holes 130 and 140 when the rollers are accommodated. It is installed to cover the upper side.

The cover plate 260 is formed by the gear combination 260a having a ratchet inside the gear combination 310a and a bevel gear when the roller 200 is received and discharged by the gear combination 310a. The rotational force is transmitted, the cover plate 260 is rotated by the rotational force, the spring is interposed in the hinge to which the cover plate 260 is connected, the elastic force is stored is rapidly opened by the ratchet while closing the cloth.

Referring to the operation of the present invention made of the above configuration as follows.

As shown in Figs. 3 to 10, while driving in the state where the rollers are exposed, the knobs and stopper driving means 450 are pushed by tapping the knobs 410 respectively formed on the inner side of the shoe with the opposite feet to accommodate the rollers. Rotating shaft 430 connected through the little by little move the stopper 350 is integrally connected to the end.

As the locking protrusion 340 connected to the bracket 210 is separated by the above operation, the brackets 210 elastically connected to the roller mounting holes 130 and 140 are respectively lowered and received separately from the roller mounting holes.

In addition, when exposing the roller 200 to the outside of the roller mounting holes 130 and 140, the knob 410 protruding from the side of the shoe 110 is rubbed using the opposite foot, and the pressing operation is performed. By rotating the ratchet wheel 420b, the rotational force continuously transmitted only in one direction by the ratchet wheel 420b is transmitted to the rotary shaft 430 located in the 90 degree direction through the worm and the worm wheel 420c, The remaining torque is stored in the spring gear of the worm wheel 420c.

In this case, the worm and the worm wheel 420c is formed of a helical type, so that the rotational force (that is, worm to worm wheel, worm wheel to worm) transmitted in both directions can be transmitted in different directions.

In addition, the rotation shaft 430, the gear combination 310a connected to the bracket 210 is connected to both ends thereof to rotate the bracket 210 to be installed in opposite directions to each other in close contact with each other and at the same time the locking projection 340 It is firmly fixed by) so that it can be easily rotated without separating when contacting the ground of the roller.

At this time, the rollers 200 having narrow widths respectively connected to the brackets 210 are in contact with each other to form a roller having a predetermined width.

In addition, the rollers 200 which are in close contact with each other are in close contact with each other by the steps and the recesses respectively formed on the upward surface thereof.

In addition, the gear combination 310a and the rotation shaft 430 may move to a gear combination having a penetration through the same shape, the rotation shaft formed in a polygon to transmit a rotational force while having a predetermined clearance.

When the knob 410 is pressed in by the above configuration, the movement of the knob is easily transmitted to the stopper through the driving bar 450a, the driven bar 450b, and the rotating plate 450c, and the fixing groove 350a is provided in the stopper. Is formed to fix or separate the locking projection (340a).

In addition, the outer knob surrounding the knob 410, when rotating it in one direction, the anti-rotation jaw (410a) protruding on one side is in contact with the bottom of the space formed on the inside of the shoe body to further suppress the fall of the knob This prevents the rollers from moving.

In addition, since a gear is not formed at one side of the rack connected to the knob when the knob 410 is upward, the rotational force remaining among the rotational forces generated to expose the roller 200 after being raised by the spring 420b-1 elasticity. The force is stored in the spring gear of the worm wheel (420c).

On the other hand, as shown in Figure 7, the roller 200, when mounted on the high heels 140, pressing the knob 410 in the vertical direction is the rotational force transmitted by the rotational force transmission means 420 in the spring-spring movement method The elevating bracket 420d is raised and lowered, and the roller 200 which is transmitted to the raising and lowering bracket 420d is raised and lowered.

In this case, the rotation shaft 430 fixed to the worm wheel 420c exposes the roller 200 formed in front of the sole 120 in the same manner as the driving of the roller described above.

In addition, in the spring moving method, when the rotating shaft 430 engaged with the worm wheel 420c rotates, the lifting bracket 420d connected to the spring 660c is moved, and the lifting bracket ( When the 420d is moved, the spring 490a is connected to one side thereof to restore the 420d.

In addition, when the knob 410 is press-fitted, the stopper 350 is moved on the same principle as in FIG. 8 to support the fixing protrusion 340 connected to the lifting lowering bracket 420d so as to support the roller 200 at a predetermined position. I support it.

In addition, the worm wheel 420 connected to the worm shaft 460, the spring gear is integrally installed on one side thereof to continuously transmit the rotational force, as well as to rotate the rotation shaft 430 at the time of full discharge of the roller. Store it to prevent damage to gears.

Pressing or rotating the knob 410 as described above and the roller 200 is installed on the bracket 210 that is elastically installed via a spring, the roller 200 is separated and installed in a plurality of opposite brackets Consisting of close contact with each other during operation, it is possible to store the rollers in the storage space of the minimum depth so that it can be mounted on shoes or shoes having the minimum thickness.

In addition, it is possible to store and expose the rollers by pressing the knob in the state of wearing the shoes, the operation is made easily.

The rollers accommodated in the roller fj mounting holes or protruding by the operation as described above, while the battery 520 is worn on the calf or waist of the user as the fixing band 510, the power of the battery 520 is driven by the motor ( 530 is supplied.

At this time, by controlling the switch scaffold 150 installed in the shoe body 100 of the user to accelerate and decelerate the motor 530, which is powered by the battery 520 forward and reverse rotation, the signal is It is possible by the connection of the terminal connector 160 and the terminal connecting projection 530a to electrically connect the switch scaffold 150 and the motor 530.

Subsequently, when power is supplied to the motor 530 to operate the motor 530, the rotational force is transmitted to the roller 200 through the power transmission piece 610 connected to the motor and the power connection piece 630 connected thereto. By rotating the roller 200 of the shoe sole 120 which protrudes, it is possible to move the magnetic force without depending on the artificial force applied by the user.

The power transmission piece 610 and the power connection piece 630 are coupled to each other by being coupled to a screw thread of the power connection piece 630 while the power connector 620 connected to the end of the power transmission piece 610 is rotated. At this time, the power transmission piece 610 consisting of a rotating rod connected to the universal joint, a bar or a power cable, and the power connecting piece 630 installed to engage with the roller 200 are connected to each other to transmit rotational force.

In addition, the roller 200 which receives the rotational force through the power connection piece 630 has a triangular contact surface facing each other to be compressed, so that the gear combination 630a of the power connection piece 630 is always provided. ) Is easily engaged with the roller 200 to transmit power.

Meanwhile, in the case of the high heel, the bevel gear 650 is connected to the power connecting piece 630 to rotate the rotating rod 660 engaged with one side thereof, and the other end of the rotating rod 660 rotates the roller 200. The roller 200 is rotated by the gear combination 660b of the supporting rotating shaft, and the rotating rod 660 is divided to easily transmit its power regardless of the raising and lowering of the bracket 210.

In addition, the roller mounting hole 130 in which the roller 200 is mounted when the plurality of cover plates 260 are connected through one side of the hinge shaft 230 through which the spring 220 is interposed and the gear combination 260a is not used. It installs so that the upper side of 140 may be covered.

By the above configuration, as well as the installation of the roller in the minimum space, the roller can be rotated by itself to reduce the inconvenience for users to use the roller shoes, and to minimize the artificial energy consumption.

As described above, according to the present invention, the roller can be mounted in a minimum space so that the roller can be mounted on shoes or shoes, which minimize the thickness of the sole portion, and the roller is operated by turning or pressing the knob without directly touching it. It can be easily stored and discharged, prevents the rollers from being relaxed by external factors, so that the body can be maintained while walking and driving, and other interference is prevented.

In addition, as the roller is driven by a repeatedly charged power source instead of artificially applied force, its use range is increased, and the operation of the roller also increases the convenience by operating the switch foot of the sole simply by operating it. Not only is it the basis of various transportation cultures, but it also has the effect of providing environmentally friendly short-range transportation without utilizing scarce energy resources.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as provided by the following claims. I would like to clarify that it is extremely easy for a person with knowledge of.

1 is a perspective view of a shoe having a conventional roller.

Figure 2a, b is a perspective view and a side view showing a conventional motor-driven inline skate, respectively.

3 is a perspective view of a roller shoe having a drive device according to the present invention;

Figures 4a, b, c are a perspective view and a side view showing the roller power transmission of the roller shoes each having a drive device according to the present invention.

Figures 5a, b, c are bottom and side views respectively showing the roller fixed state of the roller shoes having the drive device according to the present invention.

6A and 6B are respectively a perspective view showing main parts of a roller rotation force transmission state of a roller shoe having a driving device according to the present invention;

7A and 7B are main sectional side views showing the rotational force transmission state according to the knob operation of the roller shoes each having a drive device according to the present invention;

Figure 8 is a perspective view of the roller support of the roller shoe having a drive device according to the present invention.

9 is a perspective view showing a stopper operation state of a roller shoe having a drive device according to the present invention;

Fig. 10 is a sectional view showing the main parts of an operation state of a roller shoe according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings

100.Shoe body 130,140 ... Roller mounting hole

150 ... Switch foot 160 ... Terminal connection

200 ... Roller 210 ... Bracket

220 ... spring 340 ... jamming

350 ... stopper 430 ... rotation shaft

520 Battery 530 Motor

610 ... Power Transmission 620 ... Power Transmission

Claims (8)

Roller mounting holes 130 and 140 are formed at the front and rear of the sole body 120 of the shoe body 100, respectively, and are symmetrically installed so as to be stored therein and connected to the hinge shaft 230 via a spring 220. The rollers 200 fixed to the brackets 210 are respectively mounted, and the brackets 210 are rotated in opposite directions, respectively, so that the plurality of rollers 200 are in close contact with each other or a plurality of gears on the hinge shaft 230. A roller connection part 300 is formed to be connected to the gear combination 310a and is connected to the knob 410 and the knob 410 protruding from the shoe body 100 to transmit rotational force to the gear combination 310a. In the roller is provided with a roller driving unit 400 consisting of a rotating force transmission means and a rotating shaft 430 connected to the gear combination 310a, The switch foot plate 150 is installed on the inner side and is connected to the terminal connector 160 protruding on one side of the sole 120, and roller mounting holes 130 and 140 are formed at the front and rear of the sole 120, respectively. Shoe body 100; A roller (200) integrally formed with the gear (200c) on an outer side of the contact surface which is mounted in the roller mounting hole and in close contact with each other; Power supply unit 500 is attached to a part of the user body is installed to transmit the rotational force generated by the motor 530 to a certain distance; And, A drive comprising a power transmission unit 600 installed to rotate the gear combination 640 in contact with the gear 200c of the roller 200 by the power of the power supply unit 500. Roller shoes with a device. The roller 200 of claim 1, wherein the roller 200 has a stepped portion 200a and a recessed portion 200b into which the step enters are integrally formed around the surfaces in close contact with each other, and corresponds to the horn shaped tooth of the gear combination 640. A roller shoe having a drive device, characterized in that a gear (200c) having a tapered tooth mount is formed. According to claim 1, The roller 200 is mounted on the high heel 120, is installed to move up and down in the spring movement, the spring movement method, spring spring 660c connected to the rotating shaft 430 ) And the lifting bracket 420d connected to the mainspring spring 660c to move up and down, and the roller 200 is connected to the end thereof, and the lifting bracket 420d is a spring (3) on the housing 480. Roller shoes having a drive device characterized in that connected via 490a). According to claim 1, The power supply unit 500, the fixing band 510 and the battery is connected to the fixing band 510 is attached to the magic tape 510a at both ends to be worn on the calf portion or body part of the user. 520 and a motor 530 fixed to one side of the fixed band 510 to operate by the power of the battery 520, the motor 530 is controlled by a plurality of switch scaffold 150 Roller shoes having a drive device characterized in that the terminal connecting projection (530a) electrically connected to the terminal connection port 160 is integrally connected. According to claim 1, The power transmission unit 600, The power transmission piece 610 for transmitting the rotational force of the motor 530 to a predetermined distance, and the power connector 620 and the power connector connected to the end thereof ( 620 and a plurality of gear combinations 640 to be engaged to the gear 200c of the roller 200 while the power connection piece 630, the power connection piece 630 is fitted to the shoe sole 120 to be connected to the end. Roller shoes having a drive, characterized in that consisting of. According to claim 5, The power transmission piece 610 is selected from a plurality of rotary rods or power cables connected by a universal joint, the power connector 620, the power transmission piece 610 is free to rotate inside Rotating connection piece 610a is installed to be screwed to the outer side with the power connector 620 is installed so that the drive connector, characterized in that the screw thread (620a) is formed on the power connector to correspond to the rotary connection piece (610a) Roller shoes. The gear combination 260a of claim 1, further comprising a gear combination 260a connected to a hinge shaft 230 having a spring 220 interposed therebetween so as to cover an upper portion of the roller mounting holes 130 and 140 on which the roller 200 is mounted. Roller shoes having a drive device, characterized in that the cover plate 260 is connected as a plurality of hinges (260b) on one side thereof. According to claim 1 or 5, The power transmission unit 600, Bevel gear 650 is connected to the power connector 620 and the other end of the bevel gear 660a is connected to the end to be engaged therewith A rotating rod 660 is provided to transmit power to the roller 200 by the gear combination 660b, and the rotating rod 660 includes any one rod 660a connected to the lifting bracket 210. Roller shoes having a drive device, characterized in that installed to be movable inside the other rod (660b).