阅读说明：本技术 易拉胶供料装置 (Easy-to-draw glue feeding device ) 是由 刘孝国 于 2021-07-13 设计创作，主要内容包括：本发明提供一种易拉胶供料装置,包括机架,所述机架上从后端至前端设置有废料回卷机构、卷料机构、偏心夹紧机构、剥料板和出料机构,所述卷料机构上缠绕有卷料,所述卷料从卷料机构依次经过剥料板、出料机构进行面胶出料,卷料的底带经过偏心夹紧机构被卷至废料回卷机构上。本发明将原本的手工剥离易拉胶作业改成设备自动供料作业,解放操作工人的双手,从而提升生产效率；同时,此装置的成功开发,促成了自动化贴附设备的诞生,使此工艺完全实现了出料自动化作业,避免人员手指接触易拉胶背胶,导致品质风险。(The invention provides an easy-to-draw glue feeding device which comprises a rack, wherein a waste material rewinding mechanism, a coiling mechanism, an eccentric clamping mechanism, a stripping plate and a discharging mechanism are arranged on the rack from the rear end to the front end, coiled materials are wound on the coiling mechanism, surface glue discharging is carried out on the coiled materials sequentially through the stripping plate and the discharging mechanism from the coiling mechanism, and a bottom strip of the coiled materials is coiled on the waste material rewinding mechanism through the eccentric clamping mechanism. The original manual peeling easy-pulling glue operation is changed into the automatic feeding operation of equipment, and the hands of operators are liberated, so that the production efficiency is improved; meanwhile, the successful development of the device promotes the birth of automatic attaching equipment, so that the process completely realizes automatic discharging operation, and quality risks caused by the fact that fingers of personnel contact the easy-to-pull adhesive gum are avoided.)

1. The utility model provides an easy-to-draw glues feedway which characterized in that: the automatic surface glue feeding device comprises a frame, be provided with waste material backrush mechanism, coil stock mechanism, eccentric clamping mechanism, stripper plate and discharge mechanism from rear end to front end in the frame, the winding has the coil stock in the coil stock mechanism, the coil stock carries out the surface glue ejection of compact through stripper plate, discharge mechanism from coil stock mechanism in proper order, and the bottom strip of coil stock passes through eccentric clamping mechanism is rolled up to waste material backrush mechanism is last.

2. An easy-open glue feeding device according to claim 1, characterized in that: the frame includes the base and sets up in the backup pad of the base left and right sides, be provided with the constant head tank that is used for the erection bracing board on the base, waste material rewinding mechanism, coil stock mechanism, eccentric clamping mechanism and discharge mechanism are located between the backup pad of both sides.

3. An easy-open glue feeding device according to claim 2, characterized in that: the eccentric clamping mechanism comprises a rubber coating roller, an embossing roller and a stripping motor, the stripping motor is connected with the rubber coating roller, the rubber coating roller and the embossing roller are parallel to each other and are rotatably arranged on the rack, the embossing roller is located on the front side of the rubber coating roller, the rotating shaft of the embossing roller is eccentrically arranged, one end of the rotating shaft of the embossing roller is connected with a rotating handle, and the rotating handle can adjust the radial distance between the embossing roller and the rubber coating roller.

4. A pop-top glue supplying device as claimed in claim 3, wherein: a fine adjustment block is arranged between the embossing roller and a supporting plate on one side, the fine adjustment block is embedded on the outer wall of the supporting plate in a sliding mode, and the fine adjustment block can adjust the installation position of the embossing roller on the supporting plate in a sliding mode.

5. An easy-open glue feeding device according to claim 2, characterized in that: the coiling mechanism comprises a coiling shaft, mounting grooves and locking pieces, wherein the mounting grooves and the locking pieces are arranged on the outer sides of the two side supporting plates, the coiling shaft is mounted on the supporting plates, and the two ends of the coiling shaft are located in the mounting grooves and locked by the locking pieces.

6. An easy-open glue feeding device according to claim 1, characterized in that: the waste material rewinding mechanism comprises a rewinding driving unit, a rewinding shaft and an inserting strip, the rewinding driving unit is connected with the rewinding shaft, and the inserting strip is inserted into a bottom belt which is arranged on the rewinding shaft and used for fixing a coil material.

7. An easy open glue feeding device according to claim 6, characterized in that: the outer side wall of the rewinding shaft is provided with a slot along the axial direction, the inserting strip is of a U-shaped structure, one supporting leg of the U-shaped structure is inserted into the rewinding shaft, and the other supporting leg is inserted into the slot of the rewinding shaft.

8. An easy open glue feeding device according to claim 6, characterized in that: the rewinding driving unit comprises a rewinding motor, a coupler, a bearing seat and a bearing which are sequentially connected, and the bearing is sleeved on the rewinding shaft.

9. An easy-open glue feeding device according to claim 1, characterized in that: discharge mechanism includes convertible ejection of compact platform, the frame front end is provided with bears the frame, convertible ejection of compact platform articulates bears the frame on, and can for bear the frame upset, convertible ejection of compact platform with bear between the frame and inhale the subassembly through magnetism and adsorb.

10. An easy open glue feeding device according to claim 1 or 9, characterized in that: discharging mechanism still includes regulation formula response structure, regulation formula response structure includes slide rail, installation piece, inductor, regulation pole and supporting shoe, the installation piece sets up on the slide rail with sliding, the inductor is installed on the installation piece, the one end of adjusting the pole is equipped with knob portion, and the other end passes the supporting shoe and is connected to the installation piece, adjust pole and supporting shoe threaded connection, it is rotatory knob portion can make the installation piece remove along the slide rail.

Technical Field

The invention belongs to the technical field of notebook computer manufacturing, and particularly relates to an easy-to-draw glue feeding device.

Background

The easy-to-pull adhesive is a novel solid adhesive, can be continuously adhered to a certain part and can also be easily removed through external pulling force, so that the part can be recovered or repaired after the adhesive tape is removed. Notebook computer produces line when attached notebook panel easily draws to glue the operation, often does not have suitable automatic feed equipment, often purchases the easy drawing of partial shipment and glues to adopt artifical mode, cause the operating efficiency low and quality risk, have following problem: 1. manual work is inconvenient to strip the easy-to-draw glue. Firstly, the easy-to-pull adhesive tape-shaped material needs to be taken up, then one end of the easy-to-pull adhesive tape is kneaded by a left hand to be separated from the bottom tape, meanwhile, the separated end is pinched by a right hand, and finally the easy-to-pull adhesive tape is torn off from the bottom tape. After the separation action is finished, the easy-to-pull adhesive tape-shaped material needs to be put back to the production line, and then both hands can be used for attaching operation. The separation action needs four steps (picking up the easy-pulling glue, peeling and tearing, putting down the easy-pulling glue and attaching), and the two hands are needed to work cooperatively, so that the working efficiency is low. 2. The easy-to-pull adhesive is pinched by the right hand during operation, and belongs to the quality risk that sweat/impurities and the like are adhered to the easy-to-pull adhesive due to the fact that fingers directly contact the easy-to-pull adhesive, the adhesion effect of the easy-to-pull adhesive is reduced, and adhered parts are separated.

Disclosure of Invention

In view of the above disadvantages of the prior art, the present invention provides a pop-top glue feeding device, which is used for solving the problem that the pop-top glue cannot be automatically fed in the prior art and needs to be manually operated.

In order to achieve the purpose, the invention provides an easy-to-draw glue feeding device which comprises a rack, wherein a waste material rewinding mechanism, a coiling mechanism, an eccentric clamping mechanism, a stripping plate and a discharging mechanism are arranged on the rack from the rear end to the front end, a coil is wound on the coiling mechanism, surface glue discharging is carried out on the coil sequentially through the stripping plate and the discharging mechanism from the coiling mechanism, and a bottom strip of the coil is coiled on the waste material rewinding mechanism through the eccentric clamping mechanism.

Further, the frame includes the base and sets up in the backup pad of the base left and right sides, be provided with the constant head tank that is used for the erection bracing board on the base, waste material rewinding mechanism, coiling material mechanism, eccentric clamping mechanism and discharge mechanism are located between the backup pad of both sides.

Further, the eccentric clamping mechanism comprises a rubber coating roller, an embossing roller and a stripping motor, the stripping motor is connected with the rubber coating roller, the rubber coating roller and the embossing roller are parallel to each other and are rotatably arranged on the rack, the embossing roller is located on the front side of the rubber coating roller, a rotating shaft of the embossing roller is eccentrically arranged, one end of the rotating shaft of the embossing roller is connected with a rotating handle, and the rotating handle can adjust the radial distance between the embossing roller and the rubber coating roller.

Further, be provided with the fine-tuning piece between embossing cylinder and the one side backup pad, the fine-tuning piece is inlayed on the backup pad outer wall with sliding, slides the installation position of embossing cylinder in the backup pad can be adjusted to the fine-tuning piece.

Further, coiling mechanism includes the coiling axle, sets up in the mounting groove and the retaining member in the both sides backup pad outside, the coiling axle is installed in the backup pad, the both ends of coiling axle are located the mounting groove and by retaining member locking.

Further, the waste material rewinding mechanism comprises a rewinding driving unit, a rewinding shaft and an inserting strip, wherein the rewinding driving unit is connected with the rewinding shaft, and the inserting strip is inserted into a bottom belt which is arranged on the rewinding shaft and used for fixing the coil materials.

Furthermore, slots are axially formed in the outer side wall of the rewinding shaft, the inserting strips are of U-shaped structures, one supporting leg of each U-shaped structure is inserted into the rewinding shaft, and the other supporting leg is inserted into the slots of the rewinding shaft.

Further, the backrush drive unit comprises a backrush motor, a coupler, a bearing seat and a bearing which are connected in sequence, and the bearing is sleeved on the backrush shaft.

Further, discharge mechanism includes convertible ejection of compact platform, the frame front end is provided with bears the frame, convertible ejection of compact platform articulates bears the frame on, and can for bear the upset of frame, convertible ejection of compact platform with bear between the frame and inhale the subassembly through magnetism and adsorb.

Furthermore, discharge mechanism still includes regulation formula response structure, regulation formula response structure includes slide rail, installation piece, inductor, regulation pole and supporting shoe, the installation piece sets up on the slide rail with sliding, the inductor is installed on the installation piece, the one end of adjusting the pole is equipped with knob portion, and the other end passes the supporting shoe and is connected to the installation piece, adjust pole and supporting shoe threaded connection, it is rotatory knob portion can make the installation piece move along the slide rail.

As mentioned above, the easy-to-draw glue feeding device has the following beneficial effects:

the original manual peeling easy-pulling glue operation is changed into the automatic feeding operation of equipment, and the hands of operators are liberated, so that the production efficiency is improved; meanwhile, the successful development of the device promotes the birth of automatic attaching equipment, so that the process completely realizes automatic discharging operation, and quality risks caused by the fact that fingers of personnel contact the easy-to-pull adhesive gum are avoided.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention with one side support plate removed;

FIG. 3 is a schematic view of the engagement of a wrapping roller with an embossing roller according to an embodiment of the present invention;

FIG. 4 is a schematic view of an embossing drum and a support plate according to an embodiment of the present invention;

FIG. 5 is a schematic view of a material rolling mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic view of a rewind mechanism according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of an adjustable inductive structure according to an embodiment of the present invention;

description of reference numerals

10-a frame; 11-a base; 111-a positioning slot; 112-positioning the adjusting block; 12-a support plate; 121-fine tuning block; 121 a-mounting holes; 121 b-an adjustment hole;

21-a first support shaft; 22-a second support shaft; 23-a third support shaft; 24-a first tensioning shaft; 25-a second tensioning shaft;

30-stripping plate;

40-an eccentric clamping mechanism; 41-rubber coating roller; 42-an embossing drum; 43-a stripping motor; 44-a rotating handle;

50-a material rolling mechanism; 51-a coil stock shaft; 52-mounting grooves; 53-a locking member;

60-a waste rewind mechanism; 61-rewind drive unit; 62-rewinding shaft; 63-cutting; 64-rewinder mounting blocks;

70-a discharging mechanism; 71-turnover type discharging platform; 711-a loading ledge; 72-an adjustable sensing structure; 721-sliding rail; 722-a mounting block; 723-a sensor; 724-adjusting rod; 725-support block.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1 and 2, the invention provides an easy-to-draw glue feeding device, which comprises a frame 10, wherein a waste material rewinding mechanism 60, a material rolling mechanism 50, an eccentric clamping mechanism 40, a stripping plate 30 and a discharging mechanism 70 are arranged on the frame 10 from the rear end to the front end, a rolled material is wound on the material rolling mechanism 50, the rolled material sequentially passes through the stripping plate 30 and the discharging mechanism 70 from the material rolling mechanism 50 to discharge surface glue, and a bottom strip of the rolled material is rolled onto the waste material rewinding mechanism 60 through the eccentric clamping mechanism 40.

The stripper plate 30 is disposed between the left and right support plates 12, and ensures that the parallelism of the stripper knife at the upper front end of the stripper plate 30 is within a set range. The coil stock extends out from coil stock mechanism 50, through the upper surface of first back shaft 21, second back shaft 22, then walks around from the lower surface of third back shaft 23, peels off the face glue on coil stock surface through stripper plate 30 again, and the ejection of compact is followed from discharge mechanism 70 to the face glue, and the coil stock bottom band after peeling off the face glue passes through from first tensioning shaft 24 and the second tensioning shaft 25 of stripper plate 30 below to draw to waste material rewinding mechanism 60 on by eccentric clamping mechanism 40.

Specifically, the frame 10 includes a base 11 and support plates 12 disposed on the left and right sides of the base 11, a positioning groove 111 for mounting the support plates 12 is disposed on the base 11, and the waste rewinding mechanism 60, the rolling mechanism 50, the eccentric clamping mechanism 40, and the discharging mechanism 70 are disposed between the support plates 12 on the two sides. The supporting plates 12 on the two sides are arranged, so that the stability of bilateral support can be guaranteed, and the balance of bearing capacity during the operation of the whole device is guaranteed. By providing the positioning groove 111, uniformity of the installation reference can be ensured. A positioning adjusting block 112 may be disposed in the positioning groove 111, and is inserted into the positioning block through a bolt to adjust the position of the supporting plate 12 in the positioning groove 111.

Referring to fig. 3, the eccentric clamping mechanism 40 includes a wrapping roller 41, an embossing roller 42 and a peeling motor 43, the peeling motor 43 is connected to the wrapping roller 41 through a belt transmission, the wrapping roller 41 and the embossing roller 42 are parallel to each other and rotatably disposed on the frame 10, the embossing roller 42 is located on the front side of the wrapping roller 41, the rotating shaft of the embossing roller 42 is eccentrically disposed, one end of the rotating shaft of the embossing roller 42 is connected to a rotating handle 44, and the rotating handle 44 can adjust the radial distance between the embossing roller 42 and the wrapping roller 41. By adopting the structure, the clamping force between the rubber coating roller 41 and the embossing roller 42 can be adjusted at will by rotating the rotating handle 44, the stroke is not limited, and the clamping force is uniform on a horizontal line.

Referring to fig. 4, a fine adjustment block 121 is disposed between the embossing roller 42 and the one side support plate 12, the fine adjustment block 121 is slidably embedded on the outer wall of the support plate 12, and the mounting position of the embossing roller 42 on the support plate 12 can be adjusted by sliding the fine adjustment block 121. Specifically, the fine adjustment block 121 is provided with a mounting hole 121a and adjustment holes 121b located at two sides of the mounting hole 121a, the rotation shaft of the embossing drum 42 is inserted into the mounting hole 121a, the adjustment holes 121b are used for being connected with the support plate 12, and the adjustment holes 121b are kidney-shaped holes. In this embodiment, the left end of the rotating shaft of the embossing drum 42 is connected to the left support plate 12 through the positioning hole, the right end of the rotating shaft of the embossing drum 42 is connected to the right support plate 12 through the fine adjustment block 121, the outer wall of the right support plate 12 is provided with a sliding groove, the fine adjustment block 121 is slidably moved in the sliding groove, the right end of the rotating shaft of the embossing drum 42 is installed on the installation hole 121a of the fine adjustment block 121, the installation position of the rotating shaft can be adjusted by sliding the fine adjustment block 121, and the adjustment position is determined and then passes through the adjustment hole 121b and the support plate 12 through a fastener to fix the fine adjustment block 121. The structure can ensure the parallelism between the rubber coating roller 41 and the embossing roller 42, further ensure the balance of the tension force during coiling, and overcome the processing and assembling tolerance by adjusting the position of the adjusting block.

Referring to fig. 5, the winding mechanism 50 includes a winding shaft 51, an installation groove 52 disposed at the outer side of the support plates 12 at both sides, and a locking member 53, wherein the winding shaft 51 is installed on the support plates 12, and both ends of the winding shaft 51 are located in the installation groove 52 and locked by the locking member 53. Specifically, coil stock axle 51 is used for convoluteing the coil stock, and coil stock axle 51 rotatably sets up in backup pad 12, and this kind of structure can guarantee coil stock axle 51's quick dismantlement and installation, does benefit to quick replacement, improves production efficiency. Dampers can be installed at two ends of the winding shaft 51 to increase resistance when the winding shaft rotates, so that the tension of the material belt can be adjusted.

Referring to fig. 6, the scrap rewinding mechanism 60 includes a rewinding driving unit 61, a rewinding shaft 62 and an insertion strip 63, the rewinding driving unit 61 is connected to the rewinding shaft 62, and the insertion strip 63 is inserted on the rewinding shaft 62 to fix the bottom tape of the coil stock. Specifically, the outer side wall of the rewinding shaft 62 is axially provided with a slot, the inserting strip 63 is in a U-shaped structure, one supporting leg of the U-shaped structure is inserted into the rewinding shaft 62, and the other supporting leg is inserted into the slot of the rewinding shaft 62. Specifically, the bottom tape of the coil stock is inserted on the rewinding shaft 62 through the inserting strips 63 of the U-shaped structures, the bottom tape is wound outside the rewinding shaft 62 and one supporting leg when the bottom tape is wound, and the bottom tape can be easily withdrawn from the rewinding shaft 62 only by pulling out the inserting strips 63 when the bottom tape needs to be taken down. The structure can be convenient for rapidly removing the waste materials.

The rewind drive unit 61 is mounted on the support plate 12 by a rewind mounting block 64. The rewinding driving unit 61 comprises a rewinding motor, a coupler, a bearing seat and a bearing which are sequentially connected, and the bearing is sleeved on the rewinding shaft 62. Specifically, the rewinding motor is connected with the rewinding shaft 62 through the coupler, so that the transverse load of the rewinding motor is reduced, structural deformation caused by pulling of the bottom tape is avoided, and the control of the rewinding motor is changed into inching operation. And, because the rewinding shaft 62 is sleeved with a bearing, the operation stability of the scrap rewinding mechanism 60 can be ensured.

Referring to fig. 2, the discharging mechanism 70 includes an overturning type discharging platform 71, a bearing frame 711 is disposed at the front end of the frame 10, the overturning type discharging platform 71 is hinged to the bearing frame 711 and can overturn relative to the bearing frame 711, and the overturning type discharging platform 71 and the bearing frame 711 are attracted by a magnetic attraction assembly. Specifically, the subassembly is inhaled including setting up in the first magnetism of convertible ejection of compact platform 71 bottom both ends and corresponding the second magnetism that sets up on bearing frame 711 and inhale the piece, and convertible ejection of compact platform 71's both ends with bear frame 711 articulated to can realize the upset of convertible ejection of compact platform 71, it is fixed by magnetism subassembly to maintain the back and overturn the return again. This kind of structure can do benefit to the later maintenance, can turn over convertible ejection of compact platform 71 fast and handle when taking place to wear the material or abnormal conditions.

Referring to fig. 7, the discharging mechanism 70 further includes an adjustable sensing structure 72, the adjustable sensing structure 72 includes a sliding rail 721, a mounting block 722, an inductor 723, an adjusting rod 724, and a supporting block 725, the mounting block 722 is slidably disposed on the sliding rail 721, the inductor 723 is mounted on the mounting block 722, one end of the adjusting rod 724 is provided with a knob portion, the other end of the adjusting rod passes through the supporting block 725 and is connected to the mounting block 722, the adjusting rod 724 is in threaded connection with the supporting block 725, and the mounting block 722 can move along the sliding rail 721 by rotating the knob portion. Specifically, a plurality of strip-shaped grooves are formed in the turnover type discharging platform 71, and the inductors 723 are aligned with the strip-shaped grooves one to one. The sensor 723 is an optical fiber sensor for sensing whether discharging is performed. The stability of adjusting formula response structure 72 can be guaranteed through the mode that sets up slide rail 721, improves life. The outer wall of the adjusting rod 724 is provided with external threads which are matched with the internal threads inside the supporting block 725 to realize threaded connection, and the mounting block 722 can be moved by rotating the adjusting rod 724. A support bearing is arranged between the knob part and the support block 725, so that the motion stability of the adjusting rod 724 can be ensured. The mounting block 722 is moved by adjusting the knob part, and the position of the inductor 723 can be adjusted according to the width of the discharged surface adhesive, so that the device is suitable for discharging surface adhesives with different widths according to actual requirements.

The discharged easy-to-pull glue surface glue can be adsorbed by the suction head controlled by a manipulator, and then the easy-to-pull glue is pasted on a product.

In one embodiment, the easy-open adhesive feeding device can be matched with an automatic easy-open adhesive surface release film tearing mechanism for use, so that automatic adhesive pasting is realized.

Easy-to-draw glue is the strip of a rectangular shape and glues, pastes in parallel on the bottom tape in turn, and easy-to-draw glue keeps away from the bottom tape on paste on the surface have from the type membrane, the one end from the type membrane has the portion of tearing.

Easy drawing is glued the surface and is included from the automatic mechanism of tearing of type membrane: the suction head is used for sucking or releasing the easy-pulling glue; the clamping mechanism is arranged on one side of the label sucking head and used for clamping or loosening the tearing part; the air blowing mechanism is arranged on a discharging platform for providing the easy-pulling glue and is used for blowing the tearing part; and blowing the tearing part by a blowing mechanism to enable the tearing part to lean against the side wall of the head sucking head, and clamping the tearing part by the clamping mechanism.

The winding has the coil stock on easy-to-draw glue feedway's coil stock mechanism 50, the coil stock carries out the face from coil stock mechanism 50 through stripper plate 30 in proper order, discharge mechanism 70 carries out the face and glues the ejection of compact, the easy-to-draw of bar form is glued at the discharge gate this moment, the easy-to-draw is glued the mark head that inhales of the automatic mechanism of tearing of type membrane on the easy-to-draw surface and will adsorb easily to draw and glue, gas blowing mechanism blows the portion of tearing that easily draws to glue, make the portion of tearing lean on to the lateral wall of inhaling the mark head, fixture can grasp the portion of tearing together with the lateral wall of inhaling the mark head this moment. Then the easy-to-draw glue surface is adsorbed from the automatic tear mechanism of type membrane and is lived easy-to-draw glue and remove the position that the product need paste easy-to-draw glue, pastes easy-to-draw glue on the corresponding position of product, and the head of inhaling loosens, and when the automatic tear mechanism of type membrane was lifted up from the easy-to-draw glue surface, tear portion along with the head motion of inhaling to mark in order to tear from the type membrane.

In conclusion, in the easy-to-draw glue feeding device provided by the embodiment of the invention, the original manual peeling operation of the easy-to-draw glue is changed into automatic operation of equipment, and the hands of operators are liberated, so that the production efficiency is improved; meanwhile, the successful development of the device promotes the birth of automatic attaching equipment, so that the process completely realizes automatic discharging operation, and quality risks caused by the fact that fingers of personnel contact the easy-to-pull adhesive gum are avoided.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.