Furniture hardware processing equipment
Technical Field
The invention relates to the field of hardware machining, in particular to furniture hardware machining equipment.
Background
The furniture hardware is an extremely important link in the middle of the furniture modularization, and the furniture hardware can greatly improve the capability of quickly assembling furniture and can expand and extend the application range of the furniture, particularly because people continuously improve the living requirements and the joints of the house requirements climb at present, the demand of the furniture hardware is short of the demand, and meanwhile, higher requirements are provided for the wildcard degree of the hardware. The hinge is the most representative part in furniture hardware, because the hinge not only can complete the connection of most standard furniture, but also can play a role of bidirectional hinge, so that the mechanical function of the furniture can be greatly enriched, and meanwhile, the difficulty of assembling the furniture can be reduced. For the reasons mentioned above, the hinge also becomes the most demanding part of furniture hardware and the most frequent replacement. The current requirements for hinges are firstly to have a long service life and high durability, secondly to have high compatibility and universality in volume and application area, and most importantly, to be capable of being produced and manufactured in a large scale with high efficiency and low cost. Therefore, higher standards are also provided for the processing equipment of the furniture hardware. However, the current devices of this type have the following defects: (1) most of the existing hinge processing adopts a synchronous manufacturing process or integrated processing, so that multiple raw materials are easily wasted due to processing errors; (2) the existing hinge processing mostly needs to be stopped when processing parameters are modified due to the fixed production line, and the construction period is greatly delayed; (3) the application area and the volume of the hinges produced by most of the existing equipment cannot be adjusted in real time, and if the condition that the hinges cannot meet the working condition occurs, the hinges need to be processed in a later period, so that the quality of products is reduced, and the application range of the hinges of the same type is limited; (4) the hinge of durable and high life can't high-efficient large-scale production of current equipment, and this just leads to the production rhythm can't keep up with the demand. Therefore, in order to solve the problems, designing and developing furniture hardware processing equipment becomes an urgent problem in the field of furniture machining.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides furniture hardware processing equipment.
The technical scheme is as follows:
a furniture hardware processing device comprises a displacement system, a punching system, a cutting system, a die stamping system, a turning system, a drilling system and an assembling system; the punching system, the cutting system, the die stamping system, the turning system and the drilling system are sequentially arranged and are all positioned below the displacement system, and one end of the assembling system is positioned below one end of the displacement system and one end of the assembling system close to the drilling system;
the displacement system comprises a track frame I, a slide block I, a steering knuckle I, a telescopic arm I, a mechanical arm, a telescopic arm II, a joint mechanical arm I and a clamp; the top end of the first sliding block is embedded with the first track frame, the bottom end of the first sliding block is connected with the middle section of the first telescopic arm through a first steering knuckle, the top ends of the mechanical arms are connected through the first telescopic arm, the bottom end of the mechanical arm is connected with the top end of the second telescopic arm, and the bottom end of the second telescopic arm is hinged with the top end of the clamp through a first joint mechanical arm;
the punching system comprises a first rack, a slide rail, a sliding vehicle, a third telescopic arm, a lifting head, a first rotating machine, a first drill bit and a first placing frame; the sliding rail is arranged at the top of the first rack, the sliding vehicle is nested on the sliding rail, the side surface of the lifting head is connected with the side surface of the sliding vehicle through a third telescopic arm, the top end of the first rotating machine is connected with the bottom end of the lifting head, the first drill bit is nested at the bottom end of the first rotating machine, one side of the first placing frame is connected with the middle section of the first rack, and the first placing frame is positioned below the drill bit;
the cutting system comprises a case I, a chute I, a sliding block II, a telescopic arm IV, a wire cutting machine, a cutting wire, a base I, a rotating section I, a placing table I and a sleeve head I; the bottom end of the first sliding groove is connected with the first case, one end of the second sliding block is nested in the first sliding groove, the other end of the second sliding block is connected with the middle section of the linear cutting machine through a telescopic arm IV, cutting lines are nested at two ends of the cutting machine in a surrounding mode, the first base is placed on one side of the first case and located between the cutting lines, the top end of the first base is connected with the bottom end of the first placing table through a first rotating joint, and the first sleeve head is nested at the top end;
the die punching system comprises a second rack, a second joint mechanical arm, a fifth telescopic arm, a first pushing head, a bearing table, a workbench, a die orifice, a baffle, a third rack, a punching mechanical arm and a tool bit; the second rack is placed on one side of the bearing table, the second rack is hinged with one end of the first telescopic arm through a second joint mechanical arm, the first push head is arranged on the other end of the first telescopic arm, the workbench is arranged on the bearing table, the die opening is arranged on one side of the workbench, the position of the die opening faces the cutter head, the baffle is arranged on one side of the workbench, the baffle is crossed with the die opening, the third rack is placed on the other side of the bearing table, the top of the third rack is connected with the cutter head through a mechanical arm, and the cutter head is positioned above the die opening;
the turning system comprises a frame IV, a telescopic arm VI, a steering knuckle II, a telescopic arm VII, a rotary cutter head, a base II, a rotary knuckle II, a placing platform II and a sleeve head II; the rack IV is connected with the top end of the steering knuckle II through a telescopic arm VI, the bottom end of the steering knuckle II is connected with the top end of a telescopic arm VII, the rotary cutter head is nested at the bottom end of the telescopic arm VII, the base II is placed on one side of the rack IV and is positioned below the rotary cutter head, the top end of the base II is connected with the bottom end of the placing table II through a rotary joint II, and the sleeve head II is nested at the top end of the placing table II;
the drilling system comprises a sliding rail base, a sliding plate, a first support, a second rotary machine, a rotating shaft, an eight telescopic arm, a third rotary machine, a second drill bit, a third drill bit, a polishing head, a rotary table, a third base, a third rotary joint, a third placing table and a third sleeve head; the sliding plate is nested in the sliding rail base, the first support is arranged on one side of the top end of the sliding plate, the second support is arranged on the other side of the top end of the sliding plate, one side of the second rotary machine is connected with two sides of the supports, one end of the rotating shaft is connected with the center of the other side of the second rotary machine, the other end of the rotating shaft is connected with the rotating disc, the other end of the rotating shaft penetrates through the center of the rotating disc, the edge of the other side of the second rotary machine is connected with one end of the third rotary machine through a telescopic arm, one end of the second drill bit, one end of the third drill bit and one end of the polishing head are sequentially nested in the other end of the third rotary machine along the circumference, the other end of the second drill bit, the other end of the third drill bit and the other end of the polishing;
the assembling system comprises a placing frame II, a sliding chute II, a sliding block III, a push plate, a track frame II, a telescopic sliding rod, a working plate, a loop bar, a storage box, an opening I, an opening II, a pushing head II, a motor, a lifter, a lifting rod, a suction head, a case II, a lead, a frame V, a telescopic rod and a spot welding head; the second placing frame is T-shaped, the second sliding groove is attached to the corner of the second T-shaped placing frame, the bottom end of the third sliding block is nested in the second sliding groove, the top end of one end of the push plate is connected with the top end of the third sliding block, the push plate is positioned in the second placing frame, the top end of the second track frame is positioned right above the second placing frame, the top end of the telescopic sliding rod is nested in the second track frame, the bottom end of the telescopic sliding rod is connected with the top end of the working plate, the bottom end of the working plate is provided with a moving loop, a loop bar is nested on the moving loop, two sides of the storing box are respectively connected with the inner sides of the first track frame, an opening I is arranged at one end of the bottom of the storing box and faces the center of the second track frame, an opening II is arranged at the other end of the bottom of the storing box and faces two end points of the track frame, one end of the, one end of the elevator is connected with one end of the bottom of the storage box, the elevator is located above the first opening, the top end of the lifting rod is nested with the other end of the elevator, the suction head is arranged at the bottom end of the lifting rod, the second case is placed on one side of the placement frame, the five top portions of the rack are connected with the second case through a wire, the five bottom portions of the rack are connected with the inner side of the rear half portion of the track frame, the top end of the telescopic rod is nested at the five bottom ends of the rack, and the spot welding head is.
Further optimizing, be provided with the dimpled grain of different sizes on the anchor clamps.
Further optimizing, place the frame and be provided with the opening on one.
Further optimization, the number of the first sleeve head, the second sleeve head and the third sleeve head is more than 2.
Further preferably, the second drill bit is provided with an external thread.
Further preferably, the drill bit III is provided with an internal thread.
Further optimization, the push plate is uniformly provided with convex balls.
Different from the prior art, the technical scheme has the following beneficial effects:
(1) the hinge processing is separately carried out, so that the possibility of processing errors is greatly reduced, and the waste cost of raw materials is reduced when the processing errors occur.
(2) The invention does not need to be stopped when adjusting the processing parameters.
(3) The hinge processing device can process and adjust the application area and the volume of the produced hinge in real time without post processing, ensures the product quality and can widen the application range of the product.
(4) The hinge can efficiently produce hinges which are durable and have long service life in a large scale, and can meet the increasing supply demand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the displacement system of the present invention;
FIG. 3 is a schematic view of a partial structure of the displacement system of the present invention;
FIG. 4 is a schematic diagram of a punching system of the present invention;
FIG. 5 is a schematic view of the construction of the cutting system of the present invention;
FIG. 6 is a schematic diagram of the die system of the present invention;
FIG. 7 is a schematic view of the turning system of the present invention;
FIG. 8 is a schematic diagram of the construction of the drilling system of the present invention;
FIG. 9 is a schematic structural view of the mounting system of the present invention;
FIG. 10 is a schematic view of a portion of the mounting system of the present invention;
FIG. 11 is a second schematic view of a portion of the mounting system of the present invention;
FIG. 12 is a schematic view of a third embodiment of the mounting system of the present invention;
FIG. 13 is a fourth schematic partial block diagram of the mounting system of the present invention;
FIG. 14 is a schematic view of a portion of the structure of a hinge according to the present invention;
description of reference numerals:
wherein: the automatic drilling machine comprises a track frame I1, a sliding block I101, a first steering knuckle 102, a first telescopic arm 103, a mechanical arm 104, a second telescopic arm 105, a first joint mechanical arm 106, a clamp 107, a frame I2, a sliding rail 201, a sliding vehicle 202, a third telescopic arm 203, a lifting head 204, a first rotating machine 205, a first drill bit 206, a first placing frame 207, a first case 3, a first chute 301, a second sliding block 302, a fourth telescopic arm 303, a wire cutting machine 304, a cutting wire 305, a first base 306, a first rotating knuckle 307, a first placing table 308, a first sleeve head 309, a second frame 4, a second joint mechanical arm 401, a fifth telescopic arm 402, a first pushing head 403, a bearing table 404, a working table 405, a die orifice 406, a baffle 401407, a third frame 408, a punching mechanical arm 409, a tool bit 0, a fourth frame 5, a sixth telescopic arm 501, a second steering knuckle 502, a seventh telescopic arm 503, a rotating tool bit 504, a second base 505, a second rotating joint 506, a second placing table 507, The device comprises a sliding plate 601, a first support 602, a second support 603, a second rotating machine 604, a rotating shaft 605, an eight telescopic arm 606, a third rotating machine 607, a second rotating machine 608, a third rotating machine 609, a polishing head 6010, a rotating disc 6011, a third base 6012, a third rotating joint 6013, a third placing table 6014, a third sleeve 6015, a second placing frame 7, a second sliding groove 701, a third sliding block 702, a pushing plate 703, a second track frame 8, a telescopic sliding rod 801, a working plate 802, a sleeve 803, a storage box 804, a first opening 805, a second opening 806, a second pushing head 807, a motor 808, a lifter 809, a lifting rod 8010, a suction head 8011, a second chassis 8012, a lead spot welding device, a five frame 8014, a telescopic rod 8015, a head 8016, a hinge 9 and a strip shaft 901.
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.
Referring to fig. 1 to 14, a furniture hardware processing apparatus of the present embodiment includes a displacement system, a punching system, a cutting system, a die stamping system, a turning system, a drilling system, and an assembling system; the punching system, the cutting system, the die stamping system, the turning system and the drilling system are sequentially arranged and are all positioned below the displacement system, and one end of the assembling system is positioned below one end of the displacement system and one end of the assembling system close to the drilling system;
the displacement system comprises a track frame I1, a slide block I101, a knuckle I102, a telescopic arm I103, a manipulator 104, a telescopic arm II 105, a joint mechanical arm I106 and a clamp 107; the top end of the first sliding block 101 is nested with the first track frame 1, the bottom end of the first sliding block 101 is connected with the middle section of the first telescopic arm 103 through a first steering knuckle 102, the top ends of the mechanical arms 104 are connected through the first telescopic arm 103, the bottom end of the mechanical arm 104 is connected with the top end of the second telescopic arm 105, and the bottom end of the second telescopic arm 105 is hinged with the top end of the clamp 107 through a first joint mechanical arm 106;
the punching system comprises a first rack 2, a sliding rail 201, a sliding vehicle 202, a third telescopic arm 203, a lifting head 204, a first rotating machine 205, a first drill 206 and a first placing frame 207; the slide rail 201 is arranged at the top of the first rack 2, the slide vehicle 202 is nested on the slide rail 201, the side surface of the lifting head 204 is connected with the side surface of the slide vehicle 202 through a third telescopic arm 203, the top end of the first rotating machine 205 is connected with the bottom end of the lifting head 204, the first drill bit 206 is nested at the bottom end of the first rotating machine 205, one side of the first placing frame 207 is connected with the middle section of the first rack 2, and the first placing frame 207 is positioned below the first drill bit 206;
the cutting system comprises a case I3, a chute I301, a slide block II 302, a telescopic arm IV 303, a wire cutting machine 304, a cutting wire 305, a base I306, a rotating joint I307, a placing table I308 and a sleeve head I309; the bottom end of the first sliding groove 301 is connected with the first case 3, one end of the second sliding block 302 is nested in the first sliding groove 301, the other end of the second sliding block 302 is connected with the middle section of the wire cutting machine 304 through a fourth telescopic arm 303, the cutting wires 305 are nested at two ends of the cutting machine 304 in a surrounding mode, the first base 306 is placed on one side of the first case 3 and located between the cutting wires 305, the top end of the first base 306 is connected with the bottom end of the first placing table 308 through a first rotating joint 307, and the first sleeve head 309 is nested at the top end;
the die system comprises a second rack 4, a second joint mechanical arm 401, a fifth telescopic arm 402, a first push head 403, a bearing table 404, a workbench 405, a die opening 406, a baffle 407, a third rack 408, a punch mechanical arm 409 and a tool bit 4010; the second rack 4 is placed on one side of the bearing table 404, one end of the second rack 4 is hinged with one end of the fifth telescopic arm 402 through a second joint mechanical arm 401, the first push head 403 is arranged on the other end of the fifth telescopic arm 402, the workbench 405 is arranged on the bearing table 404, the die opening 406 is arranged on one side of the workbench 405, the die opening 406 faces the cutter head 4010, the baffle 407 is arranged on one side of the workbench 405, the baffle 407 and the die opening 406 intersect, the third rack 408 is placed on the other side of the bearing table 404, the top of the third rack 408 is connected with the cutter head 4010 through a mechanical punching machine arm 409, and the cutter head 4010 is located above the die opening 406;
the turning system comprises a frame four 5, a telescopic arm six 501, a steering knuckle two 502, a telescopic arm seven 503, a rotary cutter head 504, a base two 505, a rotary knuckle two 506, a placing table two 507 and a sleeve head two 508; the top end of the rack IV 5 is connected with the top end of the knuckle II 502 through a telescopic arm VI 501, the bottom end of the knuckle II 502 is connected with the top end of a telescopic arm VII 503, the rotary cutter head 504 is nested at the bottom end of the telescopic arm VII 503, the base II 505 is placed at one side of the rack IV 5, the base II 505 is positioned below the rotary cutter head 504, the top end of the base II 505 is connected with the bottom end of the placing table II 507 through a rotary joint II 506, and the sleeve head II 508 is nested at the top end of the placing table II 507;
the drilling system comprises a slide rail base 6, a sliding plate 601, a first support 602, a second support 603, a second rotating machine 604, a rotating shaft 605, an eight telescopic arm 606, a third rotating machine 607, a second rotating machine 608, a third rotating machine 609, a polishing head 6010, a rotating disc 6011, a third base 6012, a third rotating joint 6013, a third placing table 6014 and a third sleeve 6015; the sliding plate 601 is nested in the sliding rail base 6, the first support 602 is arranged on one side of the top end of the sliding plate 601, the second support 603 is arranged on the other side of the top end of the sliding plate 601, one side of the second rotary machine 604 is connected with the side of the second support 603, one end of the rotating shaft 605 is connected with the center of the other side of the second rotary machine 604, the other end of the rotating shaft 605 is connected with the rotating disc 6011, the edge of the other side of the second rotary machine 604 is connected with one end of the third rotary machine 607 through a telescopic arm eight 606, one end of the second drill 608, one end of the third drill 609 and one end of the polishing head 6010 are nested in turn in the other end of the third rotary machine 607 along the circumference, the other ends of the second drill 608, the third drill 609 and the polishing head 6010 penetrate through the edge of the rotating disc 6011 along the circumference in turn, one end of the side of the rotating disc 6011 is nested at the top end, the sleeve head third 6015 is nested at the top end of the placing platform third 6014;
the assembling system comprises a second placing frame 7, a second sliding groove 701, a third sliding block 702, a push plate 703, a second track frame 8, a telescopic sliding rod 801, a working plate 802, a loop bar 803, a storage box 804, a first opening 805, a second opening 806, a second pushing head 807, a motor 808, a lifter 809, a lifting rod 8010, a suction head 8011, a second chassis 8012, a lead 8013, a fifth rack 8014, a telescopic rod 8015 and a spot welding head 8016; the placing frame II 7 is T-shaped, the sliding groove II 701 is attached to the T-shaped corner of the placing frame II 7, the bottom end of the sliding block III 702 is nested in the sliding groove II 701, the top end of one end of the push plate 703 is connected with the top end of the sliding block III 702, the push plate 703 is located in the placing frame II 7, the top end of the track frame II 8 is located right above the placing frame II 7, the top end of the telescopic sliding rod 801 is nested in the track frame II 8, the bottom end of the telescopic sliding rod 801 is connected with the top end of the working plate 802, the bottom end of the working plate 802 is provided with a moving loop, the loop bar 803 is nested on the moving loop, two sides of the storage box 804 are respectively connected with the inner side of the front half part of the track frame II 8, the opening I805 is arranged at one end of the bottom of the storage box 804 and the opening I805 faces the center of the track frame II 8, the opening II 806 is arranged at the other end of the, the other end of the second pushing head 807 is connected with two sides of the other end of the bottom of the storage box 804 through a motor 808, one end of a lifter 809 is connected with one end of the bottom of the storage box 804, the lifter 809 is located above the first opening 805, the top end of a lifting rod 8010 is nested with the other end of the lifter 809, a suction head 8011 is arranged at the bottom end of the lifting rod 8010, the second case 8012 is placed at one side of the second placing frame 7, the top of the fifth frame 8014 is connected with the second case 8012 through a lead 8013, the bottom of the fifth frame 8014 is connected with the inner side of the rear half part of the second rail frame 8, the top end of a telescopic rod 8015 is nested at the bottom end of the.
The clamp 107 is provided with concave grains with different sizes.
And a notch is arranged on the first placing frame 207.
The number of the first sleeve 309, the second sleeve 508 and the third sleeve 6015 is more than 2.
And the second drill bit 608 is provided with external threads.
The drill bit three 609 is provided with internal threads.
Convex balls are uniformly arranged on the push plate 703.
When the invention works: the processing original plate is clamped by a clamp 107, wherein the different-size concave grains on the clamp 107 can clamp the original plates with different thicknesses. The clamping force is adjusted through the first joint mechanical arm 106, the height of the clamped original plate to be machined is adjusted through the second telescopic arm 105, the clamping length is adjusted through the first telescopic arm 103, the angle of the clamped original plate is adjusted through the first steering knuckle 102, and the first sliding block 101 can drive the machined original plate to move on the first track frame 1 to conduct machining of each procedure. And after the processing original plate is moved to the position above the first placing frame 207, the original plate is embedded into the first placing frame 207, and after the processing is finished, the clamp 107 can clamp and take out the processing original plate through the notch on the first placing frame 207. The first rotating machine 205 drives the first drill bit 206 to rotate at a high speed, the first drill bit 206 descends to drill the original plate through the extension and contraction of the lifting head 204, and the position of the hole can be controlled through the movement of the sliding vehicle 202 on the sliding rail 201 and the extension and contraction of the third telescopic arm 203. When the original plate is transferred to the position above the placing table I308 after the hole is opened, the position of the sleeve I309 is controlled to enable the hole on the original plate and the sleeve I309 to be nested with each other, so that the original plate can be fixed stably and can be moved. The height of the original plate can be controlled by controlling the lifting of the first base 306, the angle of the original plate can be controlled by the first rotating joint 307, the wire cutting machine 304 can drive the cutting wire 305 to rotate at a high speed so as to perform wire cutting on the original plate according to the required area, and the cutting depth and the cutting width can be controlled by the expansion of the fourth telescopic arm 303 and the movement of the second sliding block 302 on the first sliding groove 301. After the original plate is cut, the original plate is moved to the position above a workbench 405, the original plate is placed on the bench, one side of the original plate leans against a baffle 407, each pusher 403 can push the original plate to a fixed position by controlling the length of the five telescopic arms 402 and the angle of the two joint mechanical arms 401, then the stamping mechanical arms 409 drive the cutter heads 4010 to perform high-speed stamping, the original plate is opened, the punched residual materials fall out through a die opening 406, and the bearing table 404 can guarantee the stability of the position of the original plate in the whole stamping process. And after the punching opening of the original plate is completed, the original plate is transferred to the position above the second placing table 507, and the position of the second sleeve head 508 is controlled to enable the hole in the original plate and the second sleeve head 508 to be mutually nested, so that the original plate can be fixed stably and can be moved. The second control base 505 can control the height of the original plate by lifting, and the second rotary joint 506 can control the angle of the original plate. And controlling a telescopic arm seven 503 to enable a rotary tool bit 504 rotating at a high speed to be in contact with the original plate for turning, wherein the telescopic arm six 501 is telescopic, the sleeve head two 508 moves in a combined mode to control a machining path, and the steering knuckle two 502 is capable of controlling a machining angle. When the original plate is turned and then transferred to the position above the placing table third 6014, the position of the sleeve third 6015 is controlled so that the holes in the original plate and the sleeve third 6015 are nested with each other, so that the original plate can be fixed stably and can be moved. The height of the original plate can be controlled by controlling the lifting of the base III 6012, and the angle of the original plate can be controlled by the rotating joint III 6013. The third rotating machine 607 can drive the second rotating machine 608, the third rotating machine 609 and the polishing head 6010 to rotate at a high speed, and the length of the eight telescopic arms 606 is controlled to enable the second rotating machine 608, the third rotating machine 609 and the polishing head to drill or polish holes in an original plate. Wherein the displacement of the slide plate 601 on the slide base 6 enables further control of the machining depth. After finishing all preprocessing of the unilateral hinge 9, the hinge 9 is transferred to the upper part of the second placing frame 7 and placed in the second placing frame 7, the push plate 703 is driven to move by the movement of the third slider 702 on the second sliding chute 701, so that the two unilateral hinges 9 are both pushed to the center of the second placing frame 7, then the telescopic sliding rod 801 is extended by adjusting the position of the loop rod 803 on the working plate 802, so that the loop rod 803 can be embedded into a hole on the hinge 9, so that the hinge 9 can be stably moved, meanwhile, the positions of the two unilateral hinges 9 are finely adjusted to be assembled together, the hinge assembly 9 is moved to the lower part of the storage box 804 by the movement of the telescopic sliding rod 801 on the second rail frame 8, at the moment, the strip shaft 901 stored in the storage box 804 is pushed out from the first opening 805 by the second push head 807 to pass through the suction head 8011, then the lifting rod 8010 is controlled by the lifter 809 to drive the suction head 8011 to descend, at this time, the bar shaft 901 is sent into a hole in the middle of the hinge 9 assembly to complete the preliminary assembly, then the components completing the preliminary assembly are moved to the position below the rack five 8014, the telescopic rod 8015 is extended to enable the spot welding heads 8016 to be arranged at the two exposed ends of the bar shaft 901, the clamping position of the bar shaft 901 is fixed, and at this time, the hinge part is machined.
Although the embodiments have been described, once the basic inventive concept is obtained, other variations and modifications of these embodiments can be made by those skilled in the art, so that the above embodiments are only examples of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes using the contents of the present specification and drawings, or any other related technical fields, which are directly or indirectly applied thereto, are included in the scope of the present invention.