阅读说明：本技术 一种电力维修用线路杆塔攀爬装置及其使用方法 (Line tower climbing device for power maintenance and using method thereof ) 是由 丁西彦 于 2020-07-07 设计创作，主要内容包括：本发明公开了一种电力维修用线路杆塔攀爬装置及其使用方法,在U型架的端口处支臂上开设卡槽并配合横杆、连接块、固定销、固定板和螺杆A设置爬升轮,在U型架靠近踏板一端的内壁两侧分别利用固定杆配合U型连接件设置辅助滚轮,爬升轮一端的螺杆A通过锥形齿轮的相互啮合固定连接驱动箱内部的微型驱动电机,微型驱动电机带动爬升轮转动,载着工人在线杆外壁上自动进行上下攀爬,便捷实用,踏板上端分别开设鞋槽,鞋槽靠近鞋尖一端的槽口顶部外壁上设置限位端盖,在踏板的非固定端侧壁上设置绑腿机构,工人将鞋套进鞋槽内后,限位端盖对鞋尖部位进行限定,同时脚后跟处的绑腿机构分别与小腿进行绑定,提高了爬杆器与鞋绑定的稳定性,安全稳定。(The invention discloses a climbing device of a line pole tower for power maintenance and a using method thereof, wherein a clamping groove is arranged on a support arm at the port part of a U-shaped frame and matched with a cross rod, a connecting block, a fixed pin, a fixed plate and a screw rod A to be provided with a climbing wheel, two sides of the inner wall of one end of the U-shaped frame, which is close to a pedal, are respectively provided with an auxiliary roller by utilizing the fixed rod to be matched with the U-shaped connecting piece, the screw rod A at one end of the climbing wheel is fixedly connected with a micro driving motor inside a driving box through the mutual meshing of bevel gears, the micro driving motor drives the climbing wheel to rotate, a worker is carried to automatically climb up and down on the outer wall of the wire rod, the climbing device is convenient and practical, the upper end of the pedal is respectively provided with a shoe groove, the outer wall of the top of a notch at one end of, meanwhile, the leg wrapping mechanisms at the heels are respectively bound with the shanks, so that the binding stability of the pole climbing device and the shoes is improved, and the safety and the stability are improved.)

1. The utility model provides a line tower climbing device for power maintenance, includes climbing device (1) and manned device (2), manned device (2) set up in the both sides of climbing device (1) one end, its characterized in that: the climbing device (1) comprises a U-shaped frame (11), a holding mechanism (12), clamping grooves (13), a cross rod (14), connecting blocks (15), fixing pins (16), a fixing plate (17), climbing wheels (18) and a screw A (19), wherein the lower ends of the support arms at two ends of the U-shaped frame (11) are respectively and fixedly connected with the holding mechanism (12), the clamping grooves (13) are respectively arranged at the middle parts of the outer walls at the port parts of the support arms at two ends of the U-shaped frame (11), the middle parts of the outer walls at two ends of the cross rod (14) are respectively provided with the integrated connecting blocks (15), one end of the cross rod (14) is clamped inside the clamping groove (13) of the support arm at the port part at one side of the U-shaped frame (11) through the connecting blocks (15) and is fixedly connected through the fixing pins (16), the fixing pins (16) are fixedly connected with one end of the cross rod (, the fixing plates (17) are respectively and fixedly connected to two ends of the outer wall of one side, away from the port of the U-shaped frame (11), of the cross rod (14) and are of an integrated structure with the cross rod (14), the climbing wheel (18) is installed between the side walls of the fixing plates (17) through screws A (19) arranged at two ends and matched with bearings, and the two ends of the outer wall of one side, corresponding to the port, of the U-shaped frame (11) are respectively provided with the manned devices (2);

the manned device (2) comprises a pedal (21), shoe grooves (22), limiting end covers (23), mounting plates (24), connecting rods (25), sleeves (26), connecting rods (27) and a leg wrapping mechanism (28), wherein the pedal (21) is respectively and fixedly connected to two ends of the outer wall of one side of the U-shaped frame (11) corresponding to the port, an integrated structure is formed between the pedal (21) and the U-shaped frame (11), the shoe grooves (22) are respectively formed in the upper end of the pedal (21), the limiting end covers (23) are arranged on the outer wall of the top of a notch at one end, close to a toe cap, of each shoe groove (22), the limiting end covers (23) are both arc-shaped structures, the mounting plates (24) are respectively and fixedly connected to the outer walls on two sides of the non-fixed end of the pedal (21), the connecting rods (25) are respectively arranged between the side walls of the mounting plates (24), the sleeves (26) are respectively sleeved on the outer walls of the, the other end of the connecting rod (27) is fixedly connected with the outer wall of one side of the leg wrapping mechanism (28).

2. The power maintenance line tower climbing device of claim 1, wherein: the two sides of the inner wall of one end, close to the pedal (21), of the U-shaped frame (11) are respectively provided with an integrated fixing rod (110), the fixing rods (110) are arranged in a splayed inclined mode, one end, far away from the U-shaped frame (11), of each fixing rod (110) is respectively provided with an integrated U-shaped connecting piece (111), auxiliary rollers (112) are respectively arranged between the side walls of the U-shaped connecting pieces (111), and a triangular structure is formed between each auxiliary roller (112) and the climbing wheel (18).

3. The power maintenance line tower climbing device of claim 1, wherein: the clasping mechanism (12) comprises a vertical plate (121), a threaded hole A (122), a screw rod B (123), an adjusting knob (124), an arc-shaped clamping plate (125), a limiting hole (126) and a limiting block (127), wherein the vertical plate (121) is respectively fixedly connected to the lower ends of support arms at two ends of the U-shaped frame (11) and is of an integrated structure with the U-shaped frame (11), the threaded hole A (122) is respectively formed in the side wall of the vertical plate (121) close to the bottom, the two same screw rods B (123) are respectively in threaded connection with the threaded hole A (122) in the side wall of the vertical plate (121), the adjusting knob (124) is respectively arranged at the tail end of the screw rod B (123) at the outer side of the U-shaped frame (11), the other end of the screw rod B (123) is riveted to form the limiting block (127) to fix the arc-shaped clamping plate (125) after passing, and the limiting block (127) is arranged close to the side wall of the limiting hole (126).

4. The power maintenance line tower climbing device of claim 1, wherein: one end of the screw A (19) on one side of the climbing wheel (18), which is close to the fixed plate (17), penetrates through the side wall of the fixed plate (17), then penetrates through the side wall of the driving box (113) welded on the outer wall of the fixed plate (17) again and extends into the driving box, and the tail end of the screw A (19) in the driving box (113) is provided with a conical driven gear (114).

5. The power maintenance line tower climbing device of claim 4, wherein: the bottom plate upper end of drive case (113) has set gradually miniature driving motor (1131) and battery (1132) respectively, passes through wire electric connection between miniature driving motor (1131) and battery (1132), and the transmission shaft top at miniature driving motor (1131) top is provided with toper drive gear (1133), and toper drive gear (1133) are 45 degrees angle intermeshing with toper driven gear (114).

6. The power maintenance line tower climbing device of claim 5, wherein: the micro driving motor (1131) is a remote control type positive and negative rotation asynchronous motor, the type number of which is DM59M-140, and the micro driving motor (1131) is matched with a remote controller.

7. The power maintenance line tower climbing device of claim 1, wherein: the non-stiff end of horizontal pole (14) passes through connecting block (15) block inside draw-in groove (13) of U type frame (11) non-stiff end support arm port department, and set up threaded hole B (115) on U type frame (11) outer wall of draw-in groove (13) upper end, threaded hole B (115) intercommunication draw-in groove (13) and extend to U type frame (11) bottom, and threaded hole B (115) female connection has fixing bolt (116), threaded hole B (115) through connection piece (15) carry out swing joint to the non-stiff end of horizontal pole (14) and U type frame (11) non-stiff end support arm.

8. The power maintenance line tower climbing device of claim 1, wherein: the leg binding mechanism (28) comprises a half ring A (281), a pin shaft connecting piece (282), a half ring B (283), a limiting clamp piece (284) and an elastic insert (285), the outer wall of one side of the half ring A (281) is fixedly connected with the bottom of the connecting rod (27), one end of the half ring A (281) is fixedly connected with one end of the half ring B (283) through the pin shaft connecting piece (282), the limiting clamp piece (284) and the elastic insert (285) are respectively arranged on the outer walls of the ports of the non-fixed ends of the half ring A (281) and the half ring B (283), and the elastic insert (285) is inserted into a limiting groove of the limiting clamp piece (284) to movably connect the non-fixed ends of the half ring A (281) and the half ring B (283).

9. Use of a pole and tower climbing device for power maintenance according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

s1: after a fixing bolt (116) at the end part of the non-fixed end support arm of the U-shaped frame (11) is screwed off, the U-shaped frame (11) is unlocked by the cross rod (14), and the U-shaped frame (11) is clamped on the outer wall of the column body of the line tower;

s2: the connecting block (15) at the movable end of the cross rod (14) is clamped in the clamping groove (13) at the non-fixed end support arm port of the U-shaped frame (11) again, the fixing bolt (116) is installed in the threaded hole B (115) at the upper end of the clamping groove (13) again, the movable end of the cross rod (14) and the non-fixed end support arm of the U-shaped frame (11) are locked, and the climbing wheel (18) on the side wall of the cross rod (14) and the auxiliary rollers (112) at two ends of the inner wall of the U-shaped frame (11) are attached to and clamped on the outer wall of the column body of the line;

s3: rotating adjusting knobs (124) at the tail ends of screws B (123) on the side walls of vertical plates (121) at the bottoms of support arms at two sides of the U-shaped frame (11), and adjusting the length of the screws B (123) on the U-shaped frame (11) to enable arc-shaped clamping plates (125) at the tail ends of the screws B (123) to be close to the outer wall of a column body of a line tower;

s4: after a maintenance worker wears necessary protective tools, the maintenance worker inserts feet into shoe grooves (22) at the upper ends of pedals (21) at two ends of the outer wall of one side of the corresponding port of the U-shaped frame (11), and holds the column body of the line tower and then lifts up the leg wrapping mechanism (28) on the side wall of the non-fixed end of each pedal (21) by hands;

s5: pressing the elastic plug-in (285) and drawing the elastic plug-in (285) out of a limiting groove of the limiting clamp (284), releasing the locking of the half ring A (281) and the half ring B (283), sequentially sleeving the elastic plug-in (285) and the limiting clamp (284) outside the shanks of the two feet, and then reusing the elastic plug-in (285) and the limiting clamp (284) to lock the two feet;

s6: the portable remote controller is used for controlling and starting the micro driving motor (1131), the micro driving motor (1131) drives the climbing wheel (18) to rotate through the screw A (19), supports a maintenance worker to climb upwards along the outer wall of the column body of the line tower automatically, grips the curved leg of the column body of the line tower after the maintenance worker reaches the height of an operation place, squats half squats, and rotates the adjusting knob (124) by hand to enable the arc-shaped clamping plate (125) to clamp the outer wall of the column body of the line tower, and then stands up to perform maintenance operation;

s7: and after the maintenance operation is finished, reversely operating according to the steps S6-S1, and taking down the worker from the column of the line tower and picking up the climbing equipment.

Technical Field

The invention relates to the technical field of power maintenance auxiliary equipment, in particular to a line tower climbing device for power maintenance and a using method thereof.

Background

As is well known, the electric power transmission generally adopts a high hanging wire or buried wire mode, the buried wire is only adopted in factories, schools and living districts in cities due to the defects of large construction amount, high line laying cost, inconvenient maintenance and the like, most of power transmission lines adopt the high hanging wire mode, two high hanging wires are adopted, one is tower type, the other is rod type, the rod type is widely applied due to the reasons of convenient construction, small floor area, safe use and the like, and the climbing device used at present adopts a spiral line arc clamping mode.

Most of the existing pole climbers are hung on the outer wall of a pole by feet of workers to lift legs to climb upwards, for the workers, the physical consumption is too large in the pole climbing process, the workers are tired whether climbing up or down, and the maintenance efficiency of the workers at the high position of the pole is influenced, for example, in the Chinese invention application document with the application number of CN201910478567.2, a self-tightening pole climbing device is disclosed, the action principle of the pole climbing device is that the workers step on pedals to climb upwards, and the pole climbing device is very unfavorable for the maintenance operation of the workers; moreover, most of the existing spiral line arc clamping type pole climbers are used for climbing legs by sleeving feet in clamping sleeves of the pole climbers by workers, the binding mode of the pole climbers is quite free from following feet and poor in stability, once the pole climbers fall off from the feet accidentally, the workers cannot fall off at the high position of the pole, and the pole climbers are dangerous to the workers, for example, in the Chinese invention application document with the application number of CN201910001495.2, a pole climber device is disclosed, shoelaces are arranged at the upper end of a pedal for sleeving and binding, and the binding effect is poor.

Therefore, we have provided a line tower climbing device for power maintenance.

Disclosure of Invention

The invention aims to provide a line tower climbing device for power maintenance, which solves the problems in the background by arranging a clamping groove on a support arm at the port of a U-shaped frame, arranging a climbing wheel by matching with a cross rod, a connecting block, a fixing pin, a fixing plate and a screw rod A, arranging auxiliary rollers on two sides of the inner wall of the U-shaped frame close to one end of a pedal by matching with the U-shaped connecting piece through the fixing rod respectively, fixedly connecting the screw rod at one end of the climbing wheel with a miniature driving motor inside a driving box on the outer wall of one side of the fixing plate through the meshing of a conical transmission gear and a conical driven gear, and arranging a leg binding mechanism on the side wall of the non-fixed end of the pedal through the matching of a mounting plate.

In order to achieve the purpose, the invention provides the following technical scheme: a climbing device for a line pole tower for power maintenance comprises a climbing device and a manned device, wherein the manned device is arranged on two sides of one end of the climbing device, the climbing device comprises a U-shaped frame, a clamping mechanism, clamping grooves, a cross rod, connecting blocks, fixing pins, fixing plates, a climbing wheel and a screw A, the lower ends of the support arms at two ends of the U-shaped frame are respectively and fixedly connected with the clamping mechanism, the clamping grooves are respectively arranged at the middle parts of the outer walls at the support arm ports at two ends of the U-shaped frame, the connecting blocks are respectively arranged at the middle parts of the outer walls at two ends of the cross rod, one end of the cross rod is clamped in the clamping groove at the support arm port at one side of the U-shaped frame through the connecting blocks and is fixedly connected through the fixing pins, the fixing pins are fixedly connected with one end of the cross rod and the two ends of the, the climbing wheel is arranged between the side walls of the fixed plates through screws A arranged at two ends of the climbing wheel and matched with bearings, and two ends of the outer wall of one side of the U-shaped frame corresponding to the port are respectively provided with a manned device;

manned device includes the footboard, the shoes groove, spacing end cover, the mounting panel, the connecting rod, the sleeve, connecting rod and puttee mechanism, footboard difference fixed connection corresponds the both ends of one side outer wall of port in U type frame, and constitute the integral type structure between footboard and U type frame, the shoes groove has been seted up respectively to the footboard upper end, be provided with spacing end cover on the notch top outer wall that the shoes groove is close to tip one end, spacing end cover is the arc structure, the mounting panel difference fixed connection is on the both sides outer wall of footboard non-stiff end, and all be provided with the connecting rod between the lateral wall of mounting panel, the sleeve has been cup jointed on the outer wall of connecting rod respectively, telescopic one side outer wall middle part department is the one end of fixed connection connecting rod respectively, the other end of connecting rod links.

Furthermore, the two sides of the inner wall of one end, close to the pedal, of the U-shaped frame are respectively provided with an integrated fixed rod, the fixed rods are arranged in a splayed inclined mode, one end, far away from the U-shaped frame, of each fixed rod is respectively provided with an integrated U-shaped connecting piece, auxiliary rollers are respectively arranged between the side walls of the U-shaped connecting pieces, and a triangular structure is formed between each auxiliary roller and the climbing wheel.

Further, hold mechanism tightly and include riser, screw hole A, screw rod B, adjust knob, arc splint, spacing hole and stopper, riser difference fixed connection in the both ends support arm lower extreme of U type frame, and with U type frame between formula structure as an organic whole, be close to the bottom on the lateral wall of riser and seted up screw hole A respectively, two the same screw rods B is threaded connection inside the screw hole A on the riser lateral wall respectively, and the screw rod B end in the U type frame outside is provided with adjust knob respectively, behind the other end of screw rod B passed through the spacing hole on the arc splint lateral wall, terminal thick stopper that forms is fixed to arc splint through the riveting mound, and the lateral wall setting in spacing hole is pressed close to the stopper.

Furthermore, after one end, close to the fixed plate, of the screw a on one side of the climbing wheel penetrates through the side wall of the fixed plate, the screw a penetrates through the side wall of the driving box welded on the outer wall of the fixed plate again and extends into the driving box, and a conical driven gear is arranged at the tail end of the screw a in the driving box.

Further, the upper end of the bottom plate of the driving box is sequentially provided with a micro driving motor and a storage battery respectively, the micro driving motor and the storage battery are electrically connected through a conducting wire, a conical transmission gear is arranged at the top end of a transmission shaft at the top of the micro driving motor, and the conical transmission gear and the conical driven gear are meshed with each other at an angle of 45 degrees.

Further, the micro driving motor is a remote control type positive and negative rotation asynchronous motor, the type number of which is DM59M-140, and the micro driving motor is matched with a remote controller.

Further, the unfixed end of horizontal pole passes through the connecting block inside the draw-in groove of unfixed end support arm port department of U type frame, and sets up threaded hole B on the U type frame outer wall of draw-in groove upper end, and threaded hole B intercommunication draw-in groove and extend to U type frame bottom, and threaded hole B female connection has fixing bolt, and threaded hole B through connection piece carries out swing joint to the unfixed end of horizontal pole and U type frame unfixed end support arm.

Further, the leg wrapping mechanism comprises a semi-ring A, a pin shaft connecting piece, a semi-ring B, a limiting clamping piece and an elastic insertion piece, wherein the outer wall of one side of the semi-ring A is fixedly connected with the bottom of the connecting rod, one end of the semi-ring A is fixedly connected with one end of the semi-ring B through the pin shaft connecting piece, the limiting clamping piece and the elastic insertion piece are respectively arranged on the outer walls of the ports of the non-fixed ends of the semi-ring A and the semi-ring B, and the elastic insertion piece is inserted into a limiting groove of the limiting clamping piece to movably connect the non.

The invention provides another technical scheme that: a using method of a line tower climbing device for power maintenance comprises the following steps:

s1: after a fixing bolt at the port of the support arm at the non-fixed end of the U-shaped frame is unscrewed, the U-shaped frame is unlocked by the cross rod, and the U-shaped frame is clamped and sleeved on the outer wall of the column body of the line tower;

s2: the connecting block at the movable end of the cross rod is clamped in the clamping groove at the port of the support arm at the non-fixed end of the U-shaped frame again, the fixing bolt is installed in the threaded hole B at the upper end of the clamping groove again, the locking of the movable end of the cross rod and the support arm at the non-fixed end of the U-shaped frame is completed, and the climbing wheel on the side wall of the cross rod and the auxiliary idler wheels at two ends of the inner wall of the U-shaped frame are attached and clamped on the;

s3: rotating adjusting knobs at the tail ends of the screws B on the side walls of the vertical plates at the bottoms of the support arms at the two sides of the U-shaped frame, and adjusting the length of the screws B on the U-shaped frame to enable the arc-shaped clamping plates at the tail ends of the screws B to be close to the outer wall of the column body of the line tower;

s4: after a maintenance worker wears necessary protective tools, feet are inserted into shoe grooves at the upper ends of pedals at two ends of the outer wall of one side of the corresponding port of the U-shaped frame, and a legging mechanism on the side wall of the non-fixed end of each pedal is lifted up by hands after a column body of a line tower is held;

s5: pressing the elastic plug-in and drawing the elastic plug-in away from the limiting groove of the limiting clamping piece, releasing the locking of the semi-ring A and the semi-ring B, sequentially sleeving the elastic plug-in and the limiting clamping piece outside the crus of the two feet, and then re-using the elastic plug-in and the limiting clamping piece to lock the two feet by the semi-ring A and the semi-ring B;

s6: the portable remote controller is used for controlling and starting the micro driving motor, the micro driving motor drives the climbing wheel to rotate through the screw A, supports a maintenance worker to climb upwards along the outer wall of the column body of the line tower automatically, grips the curved leg of the column body of the line tower after the maintenance worker moves to the height of an operation position and squats half, and rotates the adjusting knob by hand to enable the arc-shaped clamping plate to clamp the outer wall of the column body of the line tower, and then stands up to perform maintenance operation;

s7: and after the maintenance operation is finished, reversely operating according to the steps S6-S1, and taking down the worker from the column of the line tower and picking up the climbing equipment.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention provides a line pole climbing device for power maintenance, wherein a clamping groove is formed in a support arm at the end opening of a U-shaped frame and matched with a cross rod, a connecting block, a fixing pin, a fixing plate and a screw rod A to form a climbing wheel, the two sides of the inner wall of one end, close to a pedal, of the U-shaped frame are respectively matched with the U-shaped connecting piece by the fixing rod to form an auxiliary roller, the screw rod A at one end of the climbing wheel is fixedly connected with a miniature driving motor inside a driving box on the outer wall of one side of the fixing plate through the meshing of a conical transmission gear and a conical driven gear, the remote-control miniature driving motor drives the climbing wheel to rotate, and a worker is carried to climb up and down on the outer wall of a line;

2. according to the line pole tower climbing device for power maintenance, the upper end of the pedal is respectively provided with the shoe grooves, the outer wall of the top of the groove opening at one end, close to the toe tips, of each shoe groove is provided with the limiting end cover, the side wall of the unfixed end of the pedal is provided with the leg binding mechanism through the matching of the mounting plate, the connecting rod, the sleeve and the connecting rod, after a worker puts a shoe into each shoe groove at the upper end of the pedal, the limiting end cover limits the toe tips, and meanwhile, the leg binding mechanisms at the heels are respectively bound with the shanks, so that the stability of binding the pole climber with the shoes and the feet is greatly improved, the risk that the traditional pole climber is easy to fall off due to the fact that the;

3. according to the line tower climbing device for power maintenance, the outer wall of one side of the semi-ring A is fixedly connected with the bottom of the connecting rod, one end of the semi-ring A is fixedly connected with one end of the semi-ring B through the pin shaft connecting piece, the non-fixed ends of the semi-ring A and the semi-ring B are connected in a sleeved clamping mode through the limiting clamping piece and the elastic inserting piece arranged on the outer wall of the port, the elastic inserting piece is pressed to withdraw from the limiting groove of the limiting clamping piece to release locking, and therefore the leg binding mechanism is fast bound and loosely bound conveniently and quickly.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a climbing device in accordance with the present invention;

FIG. 3 is a cross bar open state diagram of a climbing device of the present invention;

FIG. 4 is a schematic view of the internal structure of the driving box of the present invention;

FIG. 5 is a schematic structural view of a clasping mechanism of the present invention;

FIG. 6 is an exploded view of the clasping mechanism of the present invention;

FIG. 7 is a schematic view of the man-carrying device of the present invention;

FIG. 8 is a schematic view of the leg wrapping mechanism of the present invention;

FIG. 9 is an enlarged view of the leg wrapping mechanism of the present invention at A;

figure 10 is a view of the opening state of the legging mechanism according to the invention.

In the figure: 1. a climbing device; 11. a U-shaped frame; 12. a clasping mechanism; 121. a vertical plate; 122. a threaded hole A; 123. a screw B; 124. adjusting a knob; 125. an arc-shaped splint; 126. a limiting hole; 127. a limiting block; 13. a card slot; 14. a cross bar; 15. connecting blocks; 16. a fixing pin; 17. a fixing plate; 18. a climbing wheel; 19. a screw A; 110. fixing the rod; 111. a U-shaped connecting piece; 112. an auxiliary roller; 113. a drive box; 1131. a micro drive motor; 1132. a storage battery; 1133. a conical drive gear; 114. a conical driven gear; 115. a threaded hole B; 116. fixing the bolt; 2. a manned device; 21. a pedal; 22. a shoe groove; 23. a limiting end cover; 24. mounting a plate; 25. a connecting rod; 26. a sleeve; 27. a connecting rod; 28. a leg wrapping mechanism; 281. a semi-ring A; 282. a pin shaft connecting piece; 283. a half ring B; 284. a limiting clamping piece; 285. an elastomeric insert.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.