阅读说明：本技术 一种天窗遮阳板的生产工艺 (Production process of skylight sun shield ) 是由 章曙 刘虎成 殷振霞 陈凯 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种天窗遮阳板的生产工艺,涉及遮阳板技术领域,针对现有的生产效率低下的问题,现提出如下方案,其包括以下步骤：S1：发泡成型,把准备好的原料(叠起来的玻纤和钢条)放入到成型压机的模具中,再喷上由Poly和Iso两种按比例高压混合的混合料,进行发泡成型,发泡成基板,然后通过成型压机进行按压成型；S2：冲切/水切割,把按压成型后的基板放入到相应的冲切/水切割模具中进行孔位或边缘的冲切/水切割；S3：喷胶复合,把冲切后的基板喷上胶水,加热后放入到复合压机的模具中进行复合,复合上面料；S4：总装,把小零件人工安装到复合好的基板上,最终成为成品,S5：检验,S6：成品,S7：包装。(The invention discloses a production process of a skylight sun shield, which relates to the technical field of sun shields and aims at solving the problem of low production efficiency, the following scheme is proposed, and the production process comprises the following steps: s1: foaming and molding, namely putting the prepared raw materials (the stacked glass fibers and steel bars) into a mold of a molding press, spraying two mixtures of Poly and Iso which are mixed according to a certain proportion at high pressure, foaming and molding to form a substrate, and then pressing and molding through the molding press; s2: punching/water cutting, namely putting the pressed and molded substrate into a corresponding punching/water cutting die to perform punching/water cutting of holes or edges; s3: spraying glue for compounding, namely spraying glue on the punched substrate, heating the substrate, putting the substrate into a die of a compounding press for compounding, and compounding the substrate; s4: and final assembly, namely manually installing small parts on the compounded substrate to finally form a finished product, S5: test, S6: finished product, S7: and (6) packaging.)

1. A production process of a skylight sun shield is characterized by comprising the following steps:

s1: foam molding

Putting the prepared raw materials (the stacked glass fibers and steel bars) into a die of a forming press, spraying a mixture of Poly and Iso which are mixed at high pressure according to a certain proportion, foaming and forming to form a substrate, and then pressing and forming through the forming press;

s2: die cutting/water cutting

Putting the substrate after the press forming into a corresponding punching/water cutting die to perform punching/water cutting of hole sites or edges;

s3: spray glue compounding

Spraying glue on the punched substrate, heating, putting the substrate into a die of a composite press for compounding, and compounding the substrate;

s4: assembly

Manually installing the small parts on the compounded substrate to finally form a finished product;

s5: examination of

Inspecting each part of the finished product according to requirements;

s6: finished product

The qualified product is the qualified product;

s7: package (I)

And packaging the product according to the requirements of the packaging instruction.

2. The production process of the skylight sun shield according to claim 1, wherein the forming press used in step S1 comprises a protective box (1), the upper surface of the protective box (1) is fixedly connected with a stamping mechanism, the inner bottom of the protective box (1) is fixedly connected with a protective cover (2), the inner bottom of the protective cover (2) is fixedly connected with a support plate (12), the middle of the support plate (12) is movably matched with a push plate (25), the bottom of the protective box (1) is fixedly connected with a first driving motor (20), the output end of the first driving motor (20) is fixedly connected with a transmission mechanism positioned in the middle of the support plate (12), the output end of the transmission mechanism is in threaded connection with a plurality of arc-shaped thread plates (17), and the outer sides of the arc-shaped thread plates (17) are fixedly connected with springs (18), the one end fixedly connected with of spring (18) and backup pad (12) sliding connection's annular sliding sleeve (16), the upside fixed connection of annular sliding sleeve (16) and backup pad (12) sliding connection's fixture, the lateral wall of protection casing (2) is provided with and is connected with climbing mechanism with push pedal (25), the output of first driving motor (20) is fixedly connected with and protection casing (2) fixed connection's heat dissipation mechanism still.

3. The production process of the skylight sun visor according to claim 2, characterized in that the stamping mechanism comprises a pneumatic cylinder (3) fixedly connected with the inner top wall of the protective box (1), and the output end of the pneumatic cylinder (3) is fixedly connected with a pressure plate (4) positioned above the protective cover (2).

4. The production process of the skylight sun visor according to claim 2, characterized in that the transmission mechanism comprises a driving bevel gear (19) fixedly connected with the output end of the first driving motor (20), the upper side of the driving bevel gear (19) is engaged with a plurality of driven bevel gears (26) positioned in the middle of the supporting plate (12), one side of each driven bevel gear (26) is fixedly connected with a threaded rod (15) rotatably connected with the inner side of the supporting plate (12), and the outer side of each threaded rod (15) is in threaded connection with the arc-shaped threaded plate (17).

5. The production process of the skylight sun shield according to claim 2, characterized in that the clamping mechanism comprises a slide rod (27) fixedly connected with the upper side of the annular sliding sleeve (16), a rotating sleeve (28) is sleeved on the outer side of the slide rod (27) in a rotating manner, an arc-shaped clamping plate (13) and a square clamping plate (14) are fixedly connected on the outer side of the rotating sleeve (28), a second driving motor (29) is fixedly connected at the upper end of the slide rod (27), an adjusting gear (31) is fixedly connected at the output end of the second driving motor (29), and an adjusting gear ring (32) fixedly connected with the rotating sleeve (28) is meshed on the outer side of the adjusting gear (31).

6. The production process of the skylight sun shield according to claim 2, wherein the jacking mechanism comprises a baffle (30) fixedly connected with the upper end of a sliding rod (27), the side wall of the shield (2) is slidably connected with a first transmission rack (7) matched with the baffle (30), one side of the first transmission rack (7) is engaged with a first transmission gear (6) positioned outside the shield (2), the middle of the first transmission gear (6) is fixedly sleeved with a first transmission rod (5), the lower end of the first transmission rod (5) is fixedly connected with a first bevel gear (9), one side of the first bevel gear (9) is engaged with a second bevel gear (10), one side of the second bevel gear (10) is fixedly connected with a second transmission rod (11) positioned below the shield (2), one end of the second transmission rod (11) is fixedly connected with a second transmission gear (22), one side of the second transmission gear (22) is meshed with a second transmission rack (21) fixedly connected with the lower side of the push plate (25).

7. The production process of the skylight sun shield according to claim 2, characterized in that the heat dissipation mechanism comprises a driving wheel (24) fixedly connected with the output end of the first driving motor (20), a belt (23) is connected to the driving wheel (24), a driven wheel (33) is connected to one end of the belt (23), heat dissipation blades (34) are fixedly connected to the middle of the driven wheel (33), an annular heat dissipation cylinder (8) located on the outer side of the heat dissipation blades (34) is fixedly connected to the outer side of the shield (2), and a plurality of spray heads located inside the shield (2) are fixedly connected to the inner side of the annular heat dissipation cylinder (8).

Technical Field

The invention relates to the technical field of sun visors, in particular to a production process of a skylight sun visor.

Background

The sun visor is designed for preventing dazzling of sunlight, prevents the influence of the sunlight, can be moved back and forth in some cases, thereby adjusting the irradiation degree of the sunlight on eyes, avoiding the occurrence of accidents, has better cooling effect, can be applied to the interior, such as the sun visor of an automobile, and can also be applied to the exterior.

When general skylight sunshading board was produced, one of them step need carry out the die-casting shaping with the raw materials, and current die-casting forming device need be fixed the mould, but the centre gripping is fixed separately goes on with unloading for production efficiency reduces, and the result of use is not good.

Disclosure of Invention

The production process of the skylight sun shield solves the problem of low production efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

a production process of a skylight sun shield comprises the following steps:

s1: foam molding

Putting the prepared raw materials (the stacked glass fibers and steel bars) into a die of a forming press, spraying a mixture of Poly and Iso which are mixed at high pressure according to a certain proportion, foaming and forming to form a substrate, and then pressing and forming through the forming press;

s2: die cutting/water cutting

Putting the substrate after the press forming into a corresponding punching/water cutting die to perform punching/water cutting of hole sites or edges;

s3: spray glue compounding

Spraying glue on the punched substrate, heating, putting the substrate into a die of a composite press for compounding, and compounding the substrate;

s4: assembly

Manually installing the small parts on the compounded substrate to finally form a finished product;

s5: examination of

Inspecting each part of the finished product according to requirements;

s6: finished product

The qualified product is the qualified product;

s7: package (I)

And packaging the product according to the requirements of the packaging instruction.

Preferably, the molding press used in step S1 includes a protection box, the upper surface of the protection box is fixedly connected with a stamping mechanism, the inner bottom of the protection box is fixedly connected with a protection cover, the inner bottom of the protection cover is fixedly connected with a support plate, the middle of the support plate is movably matched with a push plate, the bottom of the protection box is fixedly connected with a first driving motor, the output end of the first driving motor is fixedly connected with a transmission mechanism positioned in the middle of the support plate, the output end of the transmission mechanism is in threaded connection with a plurality of arc-shaped thread plates, the outer sides of the plurality of arc-shaped thread plates are fixedly connected with springs, one end of each spring is fixedly connected with an annular sliding sleeve in sliding connection with the support plate, the upper side of each annular sliding sleeve is fixedly connected with a clamping mechanism in sliding connection with the support plate, the side wall of the protection cover is provided with a jacking mechanism connected with the push plate, the output end of the first driving motor is fixedly connected with a heat dissipation mechanism fixedly connected with the protective cover.

Preferably, the punching press mechanism includes with the inboard roof fixed connection's of protective housing pneumatic cylinder, the output fixedly connected with of pneumatic cylinder is located the clamp plate of protection casing top.

Preferably, the transmission mechanism comprises a driving bevel gear fixedly connected with the output end of the first driving motor, a plurality of driven bevel gears positioned in the middle of the supporting plate are meshed on the upper side of the driving bevel gear, a threaded rod rotatably connected with the inner side of the supporting plate is fixedly connected to one side of each driven bevel gear, and the outer side of the threaded rod is in threaded connection with the arc-shaped threaded plate.

Preferably, fixture include with the upside fixed connection's of annular sliding sleeve slide bar, the outside of slide bar is rotated and is cup jointed and is rotated the cover, the outside fixedly connected with arc grip block and the square grip block of rotating the cover, the upper end fixedly connected with second driving motor of slide bar, second driving motor's output fixedly connected with adjusting gear, adjusting gear's outside meshing have with rotate cover fixed connection's regulation ring gear.

Preferably, the jacking mechanism comprises a baffle fixedly connected with the upper end of the sliding rod, the side wall of the protective cover is slidably connected with a first transmission rack matched with the baffle, one side of the first transmission rack is meshed with a first transmission gear positioned on the outer side of the protective cover, a first transmission rod is fixedly sleeved in the middle of the first transmission gear, a first bevel gear is fixedly connected with the lower end of the first transmission rod, a second bevel gear is meshed with one side of the first bevel gear, a second transmission rod positioned below the protective cover is fixedly connected with one side of the second bevel gear, a second transmission gear is fixedly connected with one end of the second transmission rod, and a second transmission rack fixedly connected with the lower side of the push plate is meshed with one side of the second transmission gear.

Preferably, heat dissipation mechanism include with a driving wheel of driving motor output fixed connection, be connected with the belt on the driving wheel, the one end of belt is connected with from the driving wheel, from the middle fixedly connected with radiator vane of driving wheel, the outside fixedly connected with of protection casing is located the annular heat dissipation section of thick bamboo in the radiator vane outside, a plurality of shower nozzles that are located the inside protection casing of inboard fixedly connected with of annular heat dissipation section of thick bamboo.

The invention has the beneficial effects that:

1. the mold is placed on the supporting plate, then the first driving motor drives the driving bevel gear to rotate and simultaneously drives the driven bevel gears to rotate, so that the threaded rods simultaneously rotate to drive the arc-shaped threaded plate to move, the slide rod on the upper side of the annular sliding sleeve moves to move the arc-shaped clamping plate and the square clamping plate on the upper side of the slide rod, and further the mold is rapidly clamped and fixed, then the first driving motor continuously drives the threaded rods to rotate to separate the arc-shaped threaded plate from the threaded rods to continuously clamp, the driving wheel is driven to rotate, the driven wheel is driven to rotate through the belt to drive the radiating blades to rotate, so that the nozzles on one side of the annular radiating cylinder spray gas, heat can be radiated while clamping, when the die-casting molding is finished, the first driving motor rotates reversely to contact the arc-shaped threaded plates with the threaded rods, drive the sliding sleeve and remove, make the slide bar remove, make the mould loosen, and the slide bar is when removing, drive baffle one end, promote first drive rack and remove, make first drive gear rotate, drive first transfer lever and rotate, just can make the second bevel gear of first bevel gear one side rotate, it rotates to drive the second transfer lever, make the second drive gear of second transfer lever one end drive the second drive rack and shift up, just can promote the push pedal and rise the mould, make the mould unload, make die-casting shaping and unload go on in step, and the production efficiency is improved, and is simple in operation and convenient to use.

2. Drive adjusting gear through second driving motor and rotate, and then make the regulation ring gear drive and rotate the cover and rotate for the arc grip block that rotates the cover outside changes the position with square grip block, can carry out the centre gripping to square mould and circular mould, improves the centre gripping scope.

Drawings

FIG. 1 is a schematic sectional view of a skylight sun visor production process according to the present invention;

FIG. 2 is a schematic top view and cross-sectional view of a part of a production process of a skylight sun shield according to the present invention;

FIG. 3 is a schematic view of a partial cross-sectional view of a manufacturing process of a sun visor for a sunroof according to the present invention;

FIG. 4 is an enlarged schematic view of a position A of the production process of the skylight sun shield provided by the invention;

FIG. 5 is an enlarged schematic view of a position B of the production process of the skylight sun shield provided by the invention;

fig. 6 is an enlarged schematic view of a position C of the production process of the skylight sun shield provided by the invention.

Reference numbers in the figures: 1. a protective box; 2. a protective cover; 3. a pneumatic cylinder; 4. pressing a plate; 5. a first drive lever; 6. a first drive gear; 7. a first drive rack; 8. an annular heat dissipation cylinder; 9. a first bevel gear; 10. a second bevel gear; 11. a second transmission rod; 12. a support plate; 13. an arc-shaped clamping plate; 14. a square clamping plate; 15. a threaded rod; 16. an annular sliding sleeve; 17. an arc-shaped thread plate; 18. a spring; 19. a drive bevel gear; 20. a first drive motor; 21. a second drive rack; 22. a second transmission gear; 23. a belt; 24. a driving wheel; 25. pushing the plate; 26. a driven bevel gear; 27. a slide bar; 28. rotating the sleeve; 29. a second drive motor; 30. a baffle plate; 31. an adjusting gear; 32. adjusting the gear ring; 33. a driven wheel; 34. and a heat dissipating blade.

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.

Referring to fig. 1 to 6, a production process of a sunroof visor includes the steps of:

s1: foam molding

Putting the prepared raw materials (the stacked glass fibers and steel bars) into a die of a forming press, spraying a mixture of Poly and Iso which are mixed at high pressure according to a certain proportion, foaming and forming to form a substrate, and then pressing and forming through the forming press;

s2: die cutting/water cutting

Putting the substrate after the press forming into a corresponding punching/water cutting die to perform punching/water cutting of hole sites or edges;

s3: spray glue compounding

Spraying glue on the punched substrate, heating, putting the substrate into a die of a composite press for compounding, and compounding the substrate;

s4: assembly

Manually installing the small parts on the compounded substrate to finally form a finished product;

s5: examination of

Inspecting each part of the finished product according to requirements;

s6: finished product

The qualified product is the qualified product;

s7: package (I)

And packaging the product according to the requirements of the packaging instruction.

The forming press used in the step S1 includes a protection box 1, the upper surface of the protection box 1 is fixedly connected with a stamping mechanism, the inner bottom of the protection box 1 is fixedly connected with a protection cover 2, the inner bottom of the protection cover 2 is fixedly connected with a support plate 12, the middle of the support plate 12 is movably matched with a push plate 25, the bottom of the protection box 1 is fixedly connected with a first driving motor 20, the output end of the first driving motor 20 is fixedly connected with a transmission mechanism positioned in the middle of the support plate 12, the output end of the transmission mechanism is in threaded connection with a plurality of arc-shaped thread plates 17, the outer sides of the plurality of arc-shaped thread plates 17 are fixedly connected with springs 18, one end of each spring 18 is fixedly connected with an annular sliding sleeve 16 in sliding connection with the support plate 12, the upper side of the annular sliding sleeve 16 is fixedly connected with a clamping mechanism in sliding connection with the support plate 12, the side wall of the protection cover 2 is provided with a jacking mechanism connected with the push plate 25, the output end of the first driving motor 20 is further fixedly connected with a heat dissipation mechanism fixedly connected with the protective cover 2, by placing the mold on the supporting plate 12, then the first driving motor 20 drives the driving bevel gear 19 to rotate and simultaneously drives the plurality of driven bevel gears 26 to rotate, so that the plurality of threaded rods 15 simultaneously rotate to drive the arc-shaped threaded plates 17 to move, so that the slide rods 27 on the upper side of the annular sliding sleeve 17 move, so that the arc-shaped clamping plates 13 and the square clamping plates 14 on the upper side of the slide rods 27 can move, and the mold can be rapidly clamped and fixed, then the first driving motor 20 continuously drives the threaded rods 15 to rotate, so that the arc-shaped threaded plates 17 are separated from the threaded rods 15 to continuously clamp, the driving wheel 24 is driven to rotate, the driven wheel 33 is driven to rotate by the belt 23, and further the heat dissipation blades 34 are driven to rotate, so that the nozzles on one side of the annular heat dissipation cylinder 8 eject gas, the heat dissipation can be carried out while clamping, when the die-casting molding is finished, the first driving motor 20 rotates reversely, so that the arc-shaped threaded plate 17 is in contact with the threaded rod 15, the sliding sleeve 16 is driven to move, the sliding rod 27 is driven to move, the mold is loosened, and the sliding rod 27 drives one end of the baffle 30 to push the first transmission rack 7 to move while moving, so that the first transmission gear 6 rotates to drive the first transmission rod 5 to rotate, the second bevel gear 10 on one side of the first bevel gear 9 rotates to drive the second transmission rod 11 to rotate, the second transmission gear 22 on one end of the second transmission rod 11 drives the second transmission rack 21 to move upwards, the push plate 25 is pushed to lift the mold, the mold is unloaded, the die-casting molding and the unloading are carried out synchronously, the production efficiency is improved, the operation is simple, the use is convenient, the adjusting gear 31 is driven to rotate by the second driving motor 29, and then make the regulation ring gear 32 drive and rotate cover 28 and rotate for the arc grip block 13 that rotates the cover 28 outside exchanges the position with square grip block 14, can carry out the centre gripping to square mould and circular mould, improves the centre gripping scope.

Punching press mechanism includes with 1 inboard roof fixed connection's of protective housing pneumatic cylinder 3, the output end fixed connection of pneumatic cylinder 3 has the clamp plate 4 that is located protective housing 2 top.

The transmission mechanism comprises a driving bevel gear 19 fixedly connected with the output end of a first driving motor 20, a plurality of driven bevel gears 26 positioned in the middle of the supporting plate 12 are meshed on the upper side of the driving bevel gear 19, threaded rods 15 rotatably connected with the inner side of the supporting plate 12 are fixedly connected on one sides of the driven bevel gears 26, and the outer sides of the threaded rods 15 are in threaded connection with arc-shaped threaded plates 17.

The clamping mechanism comprises a sliding rod 27 fixedly connected with the upper side of the annular sliding sleeve 16, a rotating sleeve 28 is sleeved on the outer side of the sliding rod 27 in a rotating mode, an arc-shaped clamping plate 13 and a square clamping plate 14 are fixedly connected to the outer side of the rotating sleeve 28, a second driving motor 29 is fixedly connected to the upper end of the sliding rod 27, an output end of the second driving motor 29 is fixedly connected with an adjusting gear 31, and an adjusting gear ring 32 fixedly connected with the rotating sleeve 28 is meshed on the outer side of the adjusting gear 31.

The jacking mechanism comprises a baffle 30 fixedly connected with the upper end of a sliding rod 27, the side wall of the protective cover 2 is slidably connected with a first transmission rack 7 matched with the baffle 30, one side of the first transmission rack 7 is meshed with a first transmission gear 6 positioned on the outer side of the protective cover 2, a first transmission rod 5 is fixedly sleeved in the middle of the first transmission gear 6, the lower end of the first transmission rod 5 is fixedly connected with a first bevel gear 9, one side of the first bevel gear 9 is meshed with a second bevel gear 10, one side of the second bevel gear 10 is fixedly connected with a second transmission rod 11 positioned below the protective cover 2, one end of the second transmission rod 11 is fixedly connected with a second transmission gear 22, one side of the second transmission gear 22 is meshed with a second transmission rack 21 fixedly connected with the lower side of a push plate 25, a die-cast mold can be pushed out, and people can take materials conveniently.

The heat dissipation mechanism comprises a driving wheel 24 fixedly connected with the output end of the first driving motor 20, a belt 23 is connected to the driving wheel 24, one end of the belt 23 is connected with a driven wheel 33, a heat dissipation blade 34 is fixedly connected to the middle of the driven wheel 33, the outer side of the protection cover 2 is fixedly connected with an annular heat dissipation cylinder 8 located on the outer side of the heat dissipation blade 34, and a plurality of nozzles located inside the protection cover 2 are fixedly connected to the inner side of the annular heat dissipation cylinder 8, so that heat generated in die casting can be dissipated rapidly.

The working principle is as follows: by placing the mold on the support plate 12, then the first driving motor 20 drives the driving bevel gear 19 to rotate and simultaneously drives the driven bevel gears 26 to rotate, so that the threaded rods 15 rotate simultaneously to drive the arc-shaped threaded plate 17 to move, so that the slide rods 27 on the upper side of the annular sliding sleeve 17 move, the arc-shaped clamping plate 13 and the square clamping plate 14 on the upper side of the slide rods 27 can move, and further the mold can be clamped and fixed quickly, then the first driving motor 20 continues to drive the threaded rods 15 to rotate, so that the arc-shaped threaded plate 17 is separated from the threaded rods 15, and then the clamping is continued to drive the driving wheel 24 to rotate, the driven wheel 33 is driven by the belt 23 to rotate, and further the radiating blades 34 are driven to rotate, so that the nozzle on one side of the annular radiating cylinder 8 sprays gas, heat can be radiated while clamping, and when the die-casting molding is finished, the first driving motor 20 rotates reversely, the arc-shaped threaded plate 17 is contacted with the threaded rod 15 to drive the sliding sleeve 16 to move, the sliding rod 27 is moved to loosen the mold, the sliding rod 27 drives one end of the baffle 30 to push the first transmission rack 7 to move while moving, the first transmission gear 6 is rotated to drive the first transmission rod 5 to rotate, the second bevel gear 10 on one side of the first bevel gear 9 is rotated to drive the second transmission rod 11 to rotate, the second transmission gear 22 on one end of the second transmission rod 11 drives the second transmission rack 21 to move upwards, the push plate 25 is pushed to lift the mold, the mold is unloaded, the die-casting molding and the unloading are carried out synchronously, the production efficiency is improved, the operation is simple, the use is convenient, the second driving motor 29 drives the adjusting gear 31 to rotate, the adjusting gear 32 drives the rotating sleeve 28 to rotate, and the arc-shaped clamping plate 13 outside the rotating sleeve 28 is replaced with the square clamping plate 14, the clamping device can clamp a square mould and a round mould, and improves the clamping range.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.