阅读说明：本技术 一种成品烟箱条码压实装置 (Finished product smoke box bar code compaction device ) 是由 张楠 高尊华 张明琰 张伟峰 冯文哲 张家棋 孙甜 张东峰 李卫国 聂建立 周雪 于 2020-07-17 设计创作，主要内容包括：本发明公开了一种成品烟箱条码压实装置,包括用于输送成品烟箱的输送组件；其中,还包括固定设置的支架组件,所述支架组件包括一位于所述输送组件上方的支架横杆；压实组件,所述压实组件与所述支架横杆连接,且所述压实组件位于所述输送组件的上方,所述压实组件沿所述输送组件的输送方向向下倾斜；所述压实组件包括一转动设置的压实辊,所述压实辊位于所述压实组件的下端；所述压实辊的转动中心线水平设置,且与所述输送组件的输送方向垂直。本发明能够便于对烟箱上的条码进行压实,防止条码翘边、翘角以及条码丢失的现象产生。(The invention discloses a finished product cigarette box bar code compacting device, which comprises a conveying component for conveying a finished product cigarette box; the device also comprises a fixedly arranged bracket assembly, wherein the bracket assembly comprises a bracket cross rod positioned above the conveying assembly; a compaction assembly connected with the carriage rail and positioned above the transport assembly, the compaction assembly being downwardly inclined in a transport direction of the transport assembly; the compaction assembly comprises a compaction roller which is arranged in a rotating mode, and the compaction roller is positioned at the lower end of the compaction assembly; the rotation center line of the compaction roller is horizontally arranged and is vertical to the conveying direction of the conveying assembly. The invention can conveniently compact the bar code on the smoke box and prevent the phenomena of edge warping, corner warping and bar code loss of the bar code.)

1. A finished product cigarette case bar code compaction device comprises a conveying assembly (1) for conveying finished product cigarette cases;

the method is characterized in that: the device also comprises a fixedly arranged bracket assembly (2), wherein the bracket assembly (2) comprises a bracket cross rod (21) positioned above the conveying assembly (1);

a compacting assembly (3), wherein the compacting assembly (3) is connected with the bracket cross bar (21), the compacting assembly (3) is positioned above the conveying assembly (1), and the compacting assembly (3) is inclined downwards along the conveying direction of the conveying assembly (1); the compacting assembly (3) comprises a rotatably arranged compacting roller (31), and the compacting roller (31) is positioned at the lower end of the compacting assembly (3); the rotation center line of the compaction roller (31) is horizontally arranged and is vertical to the conveying direction of the conveying assembly (1).

2. The finished cigarette pack bar code compacting device of claim 1, wherein: the support assembly (2) further comprises two vertical rods (22), the two vertical rods (22) are fixedly arranged, and the conveying assembly (1) is located between the two vertical rods (22);

the upper ends of the two vertical rods (22) are respectively fixedly connected with the two ends of the support cross rod (21).

3. The finished cigarette pack bar code compacting device of claim 2, wherein: the bracket assembly (2) further comprises a connecting plate (23), a mounting rod (24) and an adjusting cross rod (25);

the compaction assembly (3) further comprises a connecting rod (32), a compaction rod (33) and a lower connecting rod (34);

the connecting plate (23) is a long strip-shaped plate, the connecting plate (23) is fixedly connected with the support cross rod (21), and the length direction of the connecting plate (23) is consistent with that of the support cross rod (21);

the number of the mounting rods (24) is two, the two mounting rods (24) are respectively and fixedly connected with two ends of the connecting plate (23), and the mounting rods (24) extend along the feeding direction of the conveying assembly (1);

one ends of the two mounting rods (24) far away from the connecting plate (23) are respectively fixedly connected with two ends of the adjusting cross rod (25);

The number of the connecting rods (32) is two, and the two connecting rods (32) correspond to the two mounting rods (24) one by one; one end of the connecting rod (32) is hinged with the corresponding mounting rod (24), and the hinged center of the connecting rod (32) and the mounting rod (24) is positioned between the connecting plate (23) and the adjusting cross rod (25); one ends of the two connecting rods (32) far away from the corresponding mounting rods (24) are respectively and rotatably connected with two ends of the compaction roller (31);

the two ends of the lower connecting rod (34) are respectively connected with the middle parts of the two connecting rods (32);

the compaction rod (33) penetrates through the adjusting cross rod (25), and the lower end of the compaction rod (33) is connected with the lower connecting rod (34).

4. The finished cigarette case bar code compacting device of claim 3, wherein: the compaction assembly (3) further comprises a compression spring (35), the compression spring (35) is sleeved on the compaction rod (33), one end of the compression spring (35) abuts against the lower connecting rod (34), and the other end of the compression spring (35) abuts against the adjusting cross rod (25).

5. The finished cigarette case bar code compacting device of claim 4, wherein: the upper end of the compaction rod (33) is connected with an adjusting nut (36) through threads;

The compaction assembly (3) further comprises a buffer spring (37), the buffer spring (37) is sleeved on the compaction rod (33), one end of the buffer spring (37) is abutted against the adjusting nut (36), and the other end of the buffer spring (37) is abutted against the adjusting cross rod (25).

6. The finished cigarette pack bar code compacting device of claim 5, wherein: the length of the buffer spring (37) is smaller than that of the pressing spring (35).

7. The finished cigarette case bar code compacting device of claim 6, wherein: the compaction roller (31) comprises a roller body (311), a roller shaft (312), a bearing (313), a fastening bolt (314) and a retaining ring (315);

the roller body (311) is provided with a mounting hole, and the mounting hole and the roller body (311) are coaxially arranged; the roller shaft (312) penetrates through the mounting hole, and the roller shaft (312) is rotatably connected with the roller body (311) through the bearing (313);

two ends of the roll shaft (312) penetrate into through holes in the two lower connecting rods (34) respectively, the fastening bolt (314) penetrates through the baffle ring (315) and the through holes in the lower connecting rods (32), and the fastening bolt (314) penetrates through the baffle ring (315) and the through holes in the lower connecting rods (34) in sequence and is in threaded connection with the end part of the roll shaft (312);

Two sides of the baffle ring (315) are respectively abutted against the bolt heads of the lower connecting rod (34) and the fastening bolt (314).

8. The finished smoke box bar code compacting apparatus of any one of claims 1-7 wherein: a strip-shaped hole (211) is formed in the support cross rod (21), and the length direction of the strip-shaped hole (211) is arranged along the vertical direction;

the connecting plate (23) is connected with the adjusting cross rod (25) through a mounting bolt (26); and the mounting bolt (26) passes through the strip-shaped hole (211) and is connected with the connecting plate (23).

9. The finished smoke box bar code compacting apparatus of any one of claims 1-7 wherein: the conveying assembly (1) comprises a conveying frame (11) and a conveying roller (12);

the number of the conveying frames (11) is two, and the two conveying frames (11) are arranged in parallel;

the conveying device is characterized in that the conveying rollers (12) are multiple in number, two ends of the conveying rollers (12) are respectively connected with the two conveying frames (11) in a rotating mode, and any two conveying rollers (12) are arranged in parallel.

Technical Field

The invention relates to cigarette packaging equipment, in particular to a finished product cigarette box bar code compacting device.

Background

The bar code sticking is not firm after the information bar code of the finished product cigarette box product of the tobacco enterprise is stuck, the edge sticking, the corner sticking or the bar code loss of the bar code often occur in the processes of follow-up conveying, sorting, warehousing-out, transportation and the like, and the follow-up code-based classification of the finished product cigarette box and the warehouse-out and warehouse-in and output statistics of the finished product cigarette box can be influenced when the bar code is lost or the corner sticking is serious.

Disclosure of Invention

The invention aims to provide a finished product cigarette box bar code compacting device, which is used for solving the technical problems in the prior art, can conveniently compact a bar code on a cigarette box and prevent the phenomena of edge warping, corner warping and bar code loss of the bar code.

The invention provides a finished product cigarette box bar code compacting device which comprises a conveying assembly, a bar code compacting assembly and a control assembly, wherein the conveying assembly is used for conveying a finished product cigarette box;

the device also comprises a fixedly arranged bracket assembly, wherein the bracket assembly comprises a bracket cross rod positioned above the conveying assembly;

a compaction assembly connected with the carriage rail and positioned above the transport assembly, the compaction assembly being downwardly inclined in a transport direction of the transport assembly; the compaction assembly comprises a compaction roller which is arranged in a rotating mode, and the compaction roller is positioned at the lower end of the compaction assembly; the rotation center line of the compaction roller is horizontally arranged and is vertical to the conveying direction of the conveying assembly.

The finished cigarette box bar code compacting device as described above, wherein optionally, the support assembly further includes two vertical rods, the two vertical rods are fixedly disposed, and the conveying assembly is located between the two vertical rods;

The upper ends of the two vertical rods are respectively fixedly connected with the two ends of the support cross rod.

The finished cigarette box bar code compacting device as described above, wherein optionally, the bracket assembly further comprises a connecting plate, a mounting rod and an adjusting cross rod;

the compaction assembly further comprises a connecting rod, a compaction rod and a lower connecting rod;

the connecting plate is a long strip-shaped plate and is fixedly connected with the support cross rod, and the length direction of the connecting plate is consistent with that of the support cross rod;

the number of the mounting rods is two, the two mounting rods are respectively and fixedly connected with two ends of the connecting plate, and the mounting rods extend along the feeding direction of the conveying assembly;

one ends of the two mounting rods, which are far away from the connecting plate, are fixedly connected with two ends of the adjusting transverse rod respectively;

the number of the connecting rods is two, and the two connecting rods correspond to the two mounting rods one by one; one end of each connecting rod is hinged with the corresponding mounting rod, and the hinged center of each connecting rod and the corresponding mounting rod is positioned between the connecting plate and the corresponding adjusting cross rod; one ends of the two connecting rods, which are far away from the corresponding mounting rods, are respectively in rotating connection with two ends of the compaction roller;

The two ends of the lower connecting rod are respectively connected with the middle parts of the two connecting rods;

the compaction rod penetrates through the adjusting cross rod, and the lower end of the compaction rod is connected with the lower connecting rod.

The finished cigarette box bar code compacting device as described above, wherein optionally, the compacting assembly further includes a compression spring, the compression spring is sleeved on the compacting rod, one end of the compression spring abuts against the lower connecting rod, and the other end of the compression spring abuts against the adjusting cross rod.

The finished cigarette box bar code compacting device is characterized in that the upper end of the compacting rod is connected with a regulating nut in a threaded manner;

the compaction assembly further comprises a buffer spring, the buffer spring is sleeved on the compaction rod, one end of the buffer spring abuts against the adjusting nut, and the other end of the buffer spring abuts against the adjusting cross rod.

The finished cigarette case bar code compacting device as described above, wherein optionally the length of the buffer spring is less than the length of the hold down spring.

The finished cigarette box bar code compacting device comprises a roller body, a roller shaft, a bearing, a fastening bolt and a baffle ring, wherein the roller body is arranged on the roller body;

The roller body is provided with a mounting hole which is coaxial with the roller body; the roll shaft penetrates through the mounting hole and is rotatably connected with the roll body through the bearing;

two ends of the roll shaft penetrate into through holes in the two lower connecting rods respectively, the fastening bolt penetrates through the baffle ring and the through holes in the lower connecting rods, and the fastening bolt sequentially penetrates through the baffle ring and the through holes in the lower connecting rods and is in threaded connection with the end part of the roll shaft;

and two sides of the baffle ring are respectively abutted against the lower connecting rod and the bolt head of the fastening bolt.

The finished product cigarette box bar code compacting device is characterized in that the bar-shaped holes are arranged on the cross bar of the support, and the length direction of the bar-shaped holes is arranged along the vertical direction;

the connecting plate is connected with the adjusting cross rod through a mounting bolt; and the mounting bolt penetrates through the strip-shaped hole to be connected with the connecting plate.

The finished cigarette box bar code compacting device as described above, wherein optionally the conveying assembly comprises a conveying frame and a conveying roller;

the number of the conveying frames is two, and the two conveying frames are arranged in parallel;

The conveying rollers are multiple in number, two ends of the conveying rollers are respectively connected with the two conveying frames in a rotating mode, and any two conveying rollers are arranged in parallel.

Compared with the prior art, the invention arranges a support cross bar above the conveying assembly, arranges a compaction assembly on the support cross bar, and arranges a compaction roller at the bottom of the compaction assembly; when the smoke box passes through the lower part of the compaction roller, the compaction roller is pressed on the upper surface of the smoke box, so that the bar code on the upper surface of the smoke box is pressed on the smoke box, the bar code can be compacted on the smoke box, and the problem that the bar code is lost can be solved.

Drawings

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

FIG. 2 is a front view of the disclosed compaction apparatus;

FIG. 3 is an enlarged partial schematic view of FIG. 1;

FIG. 4 is a cross-sectional view of a compaction roller;

FIG. 5 is a schematic diagram of the structure of the present invention;

FIG. 6 is a schematic view of a mounting arrangement of the compaction assembly and the bracket assembly.

Description of reference numerals:

1-a conveying assembly, 2-a support assembly, 3-a compacting assembly;

11-a conveying frame, 12-a conveying roller;

21-support cross bar, 22-vertical bar, 23-connecting plate, 24-mounting bar, 25-adjusting cross bar and 26-mounting bolt;

211-bar shaped holes;

31-a compaction roller, 32-a connecting rod, 33-a compaction rod, 34-a lower connecting rod, 35-a compaction spring, 36-an adjusting nut and 37-a buffer spring;

311-roller body, 312-roller shaft, 313-bearing, 314-fastening bolt, 315-retaining ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The invention discloses a finished cigarette box bar code compacting device, which is mainly used for solving the problems that a bar code on a finished cigarette box is easy to generate edge warping and upwarp in a factory leaving process, and is lost due to infirm adhesion and the like. In actual production, the bar code is an important certificate for leaving a factory, and the information of entering and leaving a warehouse and the statistics of yield can be rapidly obtained by scanning the bar code.

Referring to fig. 1 to 6, the present invention provides a bar code compacting device for a finished cigarette box, which includes a conveying assembly 1 for conveying the finished cigarette box. The conveyor assembly 1 is used for conveying finished cigarette boxes, wherein the conveyor assembly 1 can be a conveyor belt assembly, a conveyor roller assembly or other structures used for conveying cigarette boxes in the prior art.

Specifically, the device further comprises a fixedly arranged bracket assembly 2, wherein the bracket assembly 2 comprises a bracket cross bar 21 positioned above the conveying assembly 1. That is, the support cross bar 21 is fixedly arranged, the support cross bar 21 is transversely arranged above the conveying assembly 1, and the conveying assembly 1 passes the cigarette box from the lower part of the support cross bar 21, that is, the length direction of the support cross bar 21 is parallel to the width direction of the conveying assembly 1.

The compaction component 3 is used for contacting the top of the cigarette box and compacting the bar code on the top of the cigarette box on the cigarette box. Therefore, the compaction of the bar code is realized, and the problems of edge warping or loss of the bar code and the like are prevented.

In particular, the compacting assembly 3 is connected to the support rail 21, and in practice, the compacting assembly 3 should be movably connected to the support rail 21, so that the compacting assembly 3 has a certain amount of movement to abut against the top of the smoke box. Of course, since the compacting assembly 3 may be a combination of a series of multiple components, it may be a partial component that is fixedly attached to the rack rail 21.

Furthermore, the compacting assembly 3 is located above the conveying assembly 1, and the compacting assembly 3 is inclined downwards along the conveying direction of the conveying assembly 1. When the cigarette box passes under the compacting component 3 under the driving of the conveying component 1, the cigarette box can firstly contact with an inclined plane of the compacting component 3, and the inclined plane plays a guiding role, so that the cigarette box smoothly enters between the lower end of the compacting component 3 and the conveying component 1. Of course, it is also possible in some situations for the smoke box not to be in contact with this inclined surface of the conveyor assembly 1, but to be in direct contact with the means for compacting.

Specifically, the compacting assembly 3 comprises a rotatably arranged compacting roller 31, and the compacting roller 31 is positioned at the lower end of the compacting assembly 3; in practice, the central axis of rotation of the compacting roller 31 is arranged horizontally and perpendicular to the direction of transport of the conveyor assembly 1. That is, the center line of the compaction roller 31 is parallel to the width direction of the conveyor assembly 1, and specifically, the length of the compaction roller 31 should be not less than the width of the conveyor assembly 1. When provided, it should be ensured that, in the natural state, the lowermost part of the compacting assembly 3 is slightly below the top of the smoke box. In order to guarantee when the smoke box passes through compaction subassembly 3, compaction subassembly 3 can fully contact with the bar code at smoke box top.

In particular use, when a cigarette box passes under the compacting assembly 3, the compacting roller 31 on the compacting assembly 3 is pressed on the upper surface of the cigarette box and rolls on the upper surface of the cigarette box, and when the compacting roller 31 passes through a bar code area on the upper surface of the cigarette box, a bar code can be pressed on the cigarette box.

In order to ensure the fixed installation of the supporting cross rod 21, the support assembly 2 further comprises two vertical rods 22, and the two vertical rods 22 are fixedly arranged, specifically, the vertical rods 22 are fixedly installed on the ground, or are fixedly installed on the support of the conveying assembly 1, in short, as long as the vertical rods 22 are ensured to be fixed. Of course, the term "fixed" as used herein means that the vertical rod 22 is slidably connected to the frame of the conveyor assembly 1 and is fixed by a locking mechanism during operation, for example, in order to facilitate height adjustment of the support rail 21. Here, it is not a main improvement point of the present application, and the manner of the sliding arrangement and the locking mechanism are applied in the prior art, and are not described herein again.

Further, the conveying assembly 1 is positioned between the two vertical rods 22; that is, an inverted U-shaped structure is formed between the two vertical rods 22 and the supporting cross rod 21, and the inverted U-shaped structure spans the conveying assembly 1. Specifically, the upper ends of the two vertical rods 22 are respectively fixedly connected with the two ends of the support cross rod 21.

As a preferred implementation, in order to facilitate a good support of the compacting assembly 3, the carriage assembly 2 further comprises a connecting plate 23, a mounting bar 24 and an adjusting crossbar 25. In particular, the compacting assembly 3 further comprises a connecting rod 32, a compacting rod 33 and a lower connecting rod 34.

Further, the connecting plate 23 is a long strip-shaped plate, the connecting plate 23 is fixedly connected with the support cross rod 21, and the length direction of the connecting plate 23 is consistent with the length direction of the support cross rod 21. In this way, the installation of the entire compacting assembly 3 is facilitated by the connecting plate 23.

The number of the mounting rods 24 is two, the two mounting rods 24 are respectively fixedly connected with two ends of the connecting plate 23, and the mounting rods 24 extend along the feeding direction of the conveying assembly 1. Two installation pole 24 parallel arrangement, so, be convenient for with two connecting rod 32 parallel arrangement to the realization is right from both ends compaction roller 31 exerts pressure, can guarantee compaction roller 31's atress level, thereby makes compaction roller 31 is more even to the application of force of bar code, can flatten the bar code. In order to better realize that the compacting roller 31 uniformly presses on the top of the cigarette box, in particular, one ends of the two mounting rods 24 far away from the connecting plate 23 are fixedly connected with two ends of the adjusting transverse rod 25 respectively. In specific implementation, the mounting rod 24 and the connecting plate 23 may be integrally formed, or may be welded or bolted. Further, the number of the connecting rods 32 is two, and the two connecting rods 32 correspond to the two mounting rods 24 one by one; one end of the connecting rod 32 is hinged with the corresponding mounting rod 24, and the hinged center of the connecting rod 32 and the mounting rod 24 is located between the connecting plate 23 and the adjusting cross rod 25; one ends of the two connecting rods 32, which are far away from the corresponding mounting rods 24, are respectively and rotatably connected with two ends of the compacting roller 31. In practice, the hinge center lines of the two connecting rods 32 are located on the same horizontal line, i.e., the compacting roller 31 can swing up and down along the hinge center line between the connecting rod 32 and the mounting rod 24.

The two ends of the lower connecting rod 34 are respectively connected with the middle parts of the two connecting rods 32. The compression bar 33 passes through the adjusting cross bar 25, and the lower end of the compression bar 33 is connected with the lower link 34. In this way, the compacting roller 31 presses the bar code against the top of the box under its own weight, as the box passes under the roller 31.

In order to ensure that the compacting roller 31 can compress the bar code on the cigarette box, the compacting assembly 3 further comprises a compression spring 35, the compression spring 35 is sleeved on the compacting rod 33, one end of the compression spring 35 abuts against the lower connecting rod 34, and the other end of the compression spring 35 abuts against the adjusting transverse rod 25. In this way, when the box passes under the compacting assembly 3, the compacting rod 33 is slightly lifted, and the compacting roller 31 presses the bar code against the box under the dual action of its own weight and the elastic force of the compacting spring 35.

After the cigarette box passes through the compacting assembly 3, the compacting roller 31 and the pressing spring 35 can swing downwards under the dual actions of self gravity and the elastic force of the pressing spring 35, and in order to prevent excessive swinging, limit structures are usually arranged and collide with each other. Further, an adjusting nut 36 is threadedly coupled to an upper end of the compacting rod 33. The compacting assembly 3 further comprises a buffer spring 37, the buffer spring 37 is sleeved on the compacting rod 33, one end of the buffer spring 37 abuts against the adjusting nut 36, and the other end of the buffer spring 37 abuts against the adjusting cross rod 25. The extent of the downward movement of the compacting roller 31 in the natural state can be adjusted by means of the adjusting nut 36. With the buffer spring 37, collision between the adjustment nut 36 and the adjustment crossbar 25 can be prevented.

In a preferred embodiment, the length of the buffer spring 37 is smaller than the length of the pressing spring 35. In practice, the main function of the cushioning spring 37 is to cushion and the function of the compression spring 35 is to provide a spring force to urge the compression roller 31 against the crate.

Further, the compacting roller 31 includes a roller body 311, a roller shaft 312, a bearing 313, a fastening bolt 314, and a retainer ring 315. The periphery of the roller body 311 is adapted to be in direct contact with the top of the smoke box, and the roller shaft 312 is adapted to provide support for the roller body 311 and to apply a compressive force to the roller body 311 in use. Specifically, a mounting hole is arranged on the roller body 311, and the mounting hole and the roller body 311 are coaxially arranged; the roller 312 passes through the mounting hole, and the roller 312 is rotatably connected with the roller body 311 through the bearing 313. Specifically, two ends of the roller shaft 312 penetrate through holes on the two lower connecting rods 34 respectively, the fastening bolt 314 penetrates through the baffle ring 315 and through holes on the lower connecting rods 32, and the fastening bolt 314 sequentially penetrates through the baffle ring 315 and through holes on the lower connecting rods 34 and is in threaded connection with the end of the roller shaft 312; both sides of the retainer ring 315 respectively abut against the bolt heads of the lower link 34 and the fastening bolt 314. So, can guarantee the stationarity of compaction roller 31 in the use, guarantee that compaction roller 31 can compress tightly at the top of smoke box uniformly.

As a preferred realization, in order to more conveniently adjust the height of the compacting roller 31 in the inactive condition, this height is normally adjusted to be slightly lower than the height of the upper surface of the smoke box, and the adjusting nut 36 is not suitable for adjustment of larger heights. In order to enable the installation height of the whole structure to be adjustable, a strip-shaped hole 211 is formed in the support cross rod 21, and the length direction of the strip-shaped hole 211 is arranged along the vertical direction; in specific implementation, the number of the strip-shaped holes 211 is two, and the length directions of the two strip-shaped holes 211 are parallel. Further, the connecting plate 23 is connected with the adjusting cross bar 25 through a mounting bolt 26; and the mounting bolt 26 passes through the strip-shaped hole 211 to be connected with the connecting plate 23. Therefore, the height adjustment of the entire structure can be achieved by changing the mounting position of the mounting bolt 26 on the corresponding strip-shaped hole 211.

As a preferred implementation, the conveying assembly 1 comprises a conveying frame 11 and conveying rollers 12. That is, the conveying assembly 1 is composed of two conveying frames 11 and conveying rollers 12, and specifically, the number of the conveying frames 11 is two, and the two conveying frames 11 are arranged in parallel. Further, the number of the conveying rollers 12 is plural, two ends of the plural conveying rollers 12 are respectively rotatably connected to the two conveying frames 11, and any two conveying rollers 12 are arranged in parallel. In practice, the length of the compacting roller 31 is preferably comparable to the length of the conveyor roller 12.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.