阅读说明：本技术 一种木塑地板自动锁钉装置 (Automatic locking nail device for wood-plastic floor ) 是由 方晓钟 贾红滢 冯娟 丁浩 李永乐 刘邦树 王潇翔 李红 吴子权 于 2021-09-24 设计创作，主要内容包括：本发明提供了一种木塑地板自动锁钉装置,包括操作台、锁钉机构、滑台和钻孔机构,锁钉机构包括第一支撑架和多个锁钉单元,钻孔机构包括第二支撑架和钻孔单元,锁钉单元包括锁钉座组件和锁钉元件,钻孔单元包括钻孔座组件和钻孔元件,锁钉座组件和钻孔座组件结构相同,所述钻孔座组件用于穿过塑料底托上的固定孔在木塑地板上打孔。本发明,通过设置钻孔机构,使需要钉入螺钉的固定孔全部被钻孔元件钻过,并在木塑地板的对应位置处钻出小孔,这样钉入木塑地板内的螺钉的姿态不容易受到影响,且即便螺钉的端部并不尖锐也很容易攻入木塑地板,提高塑料底托与木塑地板之间的连接质量,无需工人进行二次补钉,有效提高生产效率。(The invention provides an automatic locking device for a wood-plastic floor, which comprises an operating table, a locking mechanism, a sliding table and a drilling mechanism, wherein the locking mechanism comprises a first support frame and a plurality of locking units, the drilling mechanism comprises a second support frame and a drilling unit, the locking unit comprises a locking screw seat component and a locking screw element, the drilling unit comprises a drilling seat component and a drilling element, the locking screw seat component and the drilling seat component have the same structure, and the drilling seat component is used for penetrating through a fixing hole on a plastic bottom support to drill a hole on the wood-plastic floor. According to the wood-plastic floor, the drilling mechanism is arranged, so that all fixing holes needing to be nailed in the screws are drilled by the drilling elements, and the small holes are drilled at the corresponding positions of the wood-plastic floor, so that the postures of the screws nailed in the wood-plastic floor are not easily influenced, the screws are easily attacked in the wood-plastic floor even if the end parts of the screws are not sharp, the connection quality between the plastic bottom support and the wood-plastic floor is improved, workers do not need to perform secondary nail repairing, and the production efficiency is effectively improved.)

1. The utility model provides an automatic locking nail device of wood-plastic floor, is in including operation panel (1), setting locking nail mechanism (2) and setting on operation panel (1) are in slip table (4) on operation panel (1), its characterized in that: the operating table (1) is further provided with a drilling mechanism (3), the locking nail mechanism (2) comprises a first support frame and a plurality of locking nail units arranged on the first support frame, and the drilling mechanism (3) comprises a second support frame and a plurality of drilling units arranged on the second support frame;

the first support frame comprises two first upright columns (21) and a first cross rod (22), the two first upright columns (21) are respectively arranged on the left side and the right side of the operating platform (1), the first cross rod (22) is arranged on the tops of the two first upright columns (21), the second support frame comprises two second upright columns (31) and a second cross rod (32), the two second upright columns (31) are respectively arranged on the left side and the right side of the operating platform (1), and the second cross rod (32) is arranged on the tops of the two second upright columns (31);

the lock nail unit includes lock nail seat subassembly and lock nail component (23), the drilling unit includes drilling seat subassembly and drilling component (33), lock nail seat subassembly with the drilling seat subassembly all adopts a structure to realize:

bedplate (5), the top of bedplate (5) is equipped with roof (51), the bottom of bedplate (5) is equipped with bottom plate (52), the middle part of bedplate (5) is followed the length direction of bedplate (5) is provided with straight line track (53), it is provided with sliding block (54) to slide on straight line track (53), the top of roof (51) is provided with pneumatic push rod (55), pneumatic push rod (55) with the upper end of sliding block (54) is connected, lock nail component (23) and drilling component (33) vertically run through to be fixed and correspond on sliding block (54).

2. The automatic locking nail device for wood-plastic floor according to claim 1, characterized in that: the first cross rod (22) and the second cross rod (32) are respectively provided with a mounting plate (6), the mounting plate (6) is provided with a plurality of fixed sliding grooves (61), and the seat plate (5) is provided with a connecting hole (56) at a position corresponding to the fixed sliding grooves (61).

3. The automatic locking nail device for wood-plastic floors according to claim 1 or 2, characterized in that: the sliding block (54) is provided with a sliding part (57), the bottom plate (52) is provided with a sliding rod (58), one end of the sliding rod (58) penetrates out of the sliding part (57), the sliding rod (58) is sleeved with a spring (59), and the spring (59) is located between the sliding part (57) and the bottom plate (52).

4. The automatic locking nail device for wood-plastic floors according to claim 1 or 2, characterized in that: install respectively first horizontal pole (22) with on second horizontal pole (32) mounting panel (6) set up in opposite directions, and are a plurality of the lock nail unit sets up in opposite directions with a plurality of drilling unit, lock nail component (23) with the centre-to-centre spacing of drilling component (33) is equal to the interval between the two fixed orificess that need be nailed into the screw on the plastics collet fore-and-aft direction that corresponds.

5. The automatic locking nail device for wood-plastic floors according to claim 1 or 2, characterized in that: a sliding track (11) is arranged at the position, corresponding to the first upright post (21), of the operating platform (1), a moving block (24) is arranged at the bottom of the first upright post (21), and the moving block (24) is arranged on the sliding track (11) in a sliding mode.

6. The automatic locking nail device for wood-plastic floor according to claim 5, characterized in that: a groove (12) is formed in the sliding track (11), a screw rod (13) is rotatably arranged in the groove (12), one end of the screw rod (13) extends out of the sliding track (11) and is connected with a motor (14), and the bottom of the moving block (24) is in transmission fit with the screw rod (13).

7. The automatic locking nail device for wood-plastic floor according to claim 5, characterized in that: follow on slip table (4) have seted up a plurality of T type spout (41) on the length direction and the width direction of slip table (4), still be provided with a plurality of spacing posts (42) on slip table (4), spacing post (42) include slider (421) and stopper (422), the bottom of slider (421) slides and sets up in T type spout (41) and with the spacing cooperation of the upper and lower direction of T type spout (41), the top of slider (421) stretches into in stopper (422) and through interior hex bolts (423) with stopper (422) fixed connection together, stopper (422) can' T be followed the top of T type spout (41) gets into inside T type spout (41).

Technical Field

The invention relates to the technical field of wood-plastic floor processing, in particular to an automatic locking nail device for a wood-plastic floor.

Background

In the wood-plastic floor course of working, often need install the plastics collet additional at wood-plastic floor's the back, adopt automatic lock nailing machine to process it among the prior art usually, concrete operating procedure: firstly, put things in good order the wood-Plastic of a piece on the slip table of automatic nailing machine, the back of wood-Plastic makes progress, then place the plastics collet bottom up on the back of wood-Plastic, it has a plurality of fixed orificess that are used for wearing to establish the screw on the plastics collet, later equipment starts, the slip table sends into the below of locking nail unit with wood-Plastic together with the plastics collet, the locking nail unit aims at the fixed orifices with the screw, then the locking nail unit drives the screw rotation and makes the screw nail fixed together with wood-Plastic on going into wood-Plastic.

However, in the actual use process, the fixing holes on the plastic bottom support are not complete through holes sometimes, some fixing holes are internally provided with convex blocks, the posture of screws entering the fixing holes is influenced, some fixing holes are in a blind hole shape, a plastic thin layer is arranged inside the fixing holes, the screws are difficult to attack, the other screws have certain defects, the tips of the screws are not sharp and cannot attack the back of the wood-plastic floor, the factors are numerous in the actual use process, the plastic bottom support cannot be fixed with the wood-plastic floor well often, the quality of connection between the plastic bottom support and the wood-plastic floor is poor, follow-up workers are required to perform secondary nail repairing, and the production efficiency is greatly influenced.

Disclosure of Invention

The invention aims to solve the technical problem of providing an automatic nail locking device for a wood-plastic floor, which can ensure that the connection quality between a plastic bottom support and the wood-plastic floor is good and does not need workers to perform secondary nail repairing.

In order to achieve the purpose, the technical scheme of the invention is realized as follows: an automatic locking device for wood-plastic floors comprises an operating platform, a locking mechanism arranged on the operating platform and a sliding table arranged on the operating platform, wherein a drilling mechanism is further arranged on the operating platform, the locking mechanism comprises a first support frame and a plurality of locking units arranged on the first support frame, and the drilling mechanism comprises a second support frame and a plurality of drilling units arranged on the second support frame;

the first support frame comprises two first stand columns and a first cross rod, the two first stand columns are respectively arranged on the left side and the right side of the operating platform, the first cross rod is arranged at the tops of the two first stand columns, the second support frame comprises two second stand columns and a second cross rod, the two second stand columns are respectively arranged on the left side and the right side of the operating platform, and the second cross rod is arranged at the tops of the two second stand columns;

the lock nail unit includes lock nail seat subassembly and lock nail component, the drilling unit includes drilling seat subassembly and drilling component, lock nail seat subassembly with drilling seat subassembly all adopts a structure to realize:

the bedplate, the top of bedplate is equipped with the roof, the bottom of bedplate is equipped with the bottom plate, the middle part of bedplate is followed the length direction of bedplate is provided with the straight line track, the slip is provided with the sliding block on the straight line track, the top of roof is provided with pneumatic push rod, pneumatic push rod with the upper end of sliding block is connected, the locking nail component and drilling component vertically runs through to be fixed and is corresponding on the sliding block.

Furthermore, the first cross rod and the second cross rod are respectively provided with a mounting plate, the mounting plate is provided with a plurality of fixed sliding grooves, and the seat plate is provided with connecting holes at positions corresponding to the fixed sliding grooves.

Further, be provided with the sliding part on the sliding block, be provided with the slide bar on the bottom plate, the one end of slide bar is worn out the sliding part, the cover is equipped with the spring on the slide bar, the spring be located the sliding part with between the bottom plate.

Further, install respectively on first horizontal pole with on the second horizontal pole the mounting panel sets up in opposite directions, and is a plurality of the lock nail unit sets up with a plurality of drilling unit is in opposite directions, the lock nail component with the centre-to-centre spacing of drilling component equals the interval between two fixed orificess that need be nailed into the screw on the corresponding plastics collet fore-and-aft direction.

Furthermore, a sliding track is arranged at the position, corresponding to the first upright post, of the operating platform, a moving block is arranged at the bottom of the first upright post, and the moving block is arranged on the sliding track in a sliding mode.

Furthermore, a groove is formed in the sliding track, a screw rod is rotationally arranged in the groove, one end of the screw rod extends out of the sliding track and is connected with a motor, and the bottom of the moving block is in transmission fit with the screw rod.

Further, follow on the slip table a plurality of T type spouts have been seted up on the length direction and the width direction of slip table, still be provided with a plurality of spacing posts on the slip table, spacing post includes slider and stopper, the bottom of slider slides and sets up in the T type spout and with the spacing cooperation of the upper and lower direction of T type spout, the top of slider stretches into in the stopper and through interior hexagonal bolt with stopper fixed connection is in the same place, the stopper can' T be followed the top of T type spout gets into inside the T type spout.

The invention has the beneficial effects that:

according to the invention, the drilling mechanism is arranged on the front side of the locking screw mechanism, so that all fixing holes needing to be nailed by screws are drilled by the drilling element, and the small holes are drilled at the corresponding positions of the wood-plastic floor, therefore, the posture of the screws nailed in the wood-plastic floor is not easily influenced, and the screws are easily attacked into the wood-plastic floor even if the end parts of the screws are not sharp, so that the plastic bottom support and the wood-plastic floor can achieve a good fixing effect, the connection quality between the plastic bottom support and the wood-plastic floor is improved, secondary nail supplementing is not required for workers, and the production efficiency is effectively improved.

Drawings

In the drawings:

fig. 1 is a perspective view of an automatic nail locking device for a wood plastic floor according to an embodiment of the present invention;

FIG. 2 is a structural view of a seat plate according to an embodiment of the present invention;

FIG. 3 is a half sectional view of a spacing post according to an embodiment of the invention;

fig. 4 is a structural view of a mounting plate according to an embodiment of the present invention.

Description of reference numerals:

1-an operation table, 11-a sliding track, 12-a groove, 13-a screw rod, 14-a motor, 2-a nail locking mechanism, 21-a first upright post, 22-a first cross bar, 23-a nail locking element, 24-a moving block, 3-a drilling mechanism, 31-a second upright post, 32-a second cross bar, 33-a drilling element, 4-a sliding table, 41-a T-shaped sliding groove, 42-a limiting post, 421-a sliding block, 422-a limiting block, 423-an inner hexagonal bolt, 5-a seat plate, 51-a top plate, 52-a bottom plate, 53-a linear track, 54-a sliding block, 55-a pneumatic push rod, 56-a connecting hole, 57-a sliding part, 58-a sliding rod, 581-a stopping part, 59-a spring and 6-a mounting plate, 61-fixed chute.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, and it should be understood that the described examples are only a part of the examples of the invention, and not all of the examples. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. 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.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the invention.

See fig. 1-4.

The invention relates to an automatic locking device for a wood-plastic floor, which comprises an operation table 1, a locking nail mechanism 2 arranged on the operation table 1, a drilling mechanism 3 arranged on the operation table 1 and a sliding table 4 arranged on the operation table 1, wherein the drilling mechanism 3 is positioned at the front side of the locking nail mechanism 2, the locking nail mechanism 2 comprises a first support frame arranged on the operation table 1 and a plurality of locking nail units arranged on the first support frame, and the drilling mechanism 3 comprises a second support frame arranged on the operation table 1 and a plurality of drilling units arranged on the second support frame;

the first support frame is composed of two first upright columns 21 and a first cross rod 22, the two first upright columns 21 are respectively arranged on the left side and the right side of the operating platform 1, the first cross rod 22 is arranged on the tops of the two first upright columns 21, the second support frame is composed of two second upright columns 31 and a second cross rod 32, the two second upright columns 31 are respectively arranged on the left side and the right side of the operating platform 1, and the second cross rod 32 is arranged on the tops of the two second upright columns 31;

the locking nail unit includes locking nail seat subassembly and locking nail component 23, the drilling unit includes drilling seat subassembly and drilling component 33, the locking nail seat subassembly with the drilling seat subassembly all adopts a structure to realize:

the seat plate 5 is arranged in a long strip shape, the seat plate 5 is mounted on the corresponding first support frame and the second support frame, a top plate 51 is arranged at the top of the seat plate 5, a bottom plate 52 is arranged at the bottom of the seat plate 5, a linear track 53 is arranged in the middle of the seat plate 5 along the length direction of the seat plate 5, a sliding block 54 is arranged on the linear track 53 in a sliding manner, a pneumatic push rod 55 is arranged at the top of the top plate 51, the pneumatic push rod 55 is connected with the upper end of the sliding block 54 and used for driving the sliding block 54 to slide up and down on the linear track 53, the locking pin element 23 and the drilling element 33 are longitudinally fixed on the corresponding sliding block 54 in a penetrating manner, and the locking pin element 23 and the drilling element 33 move up and down along with the corresponding sliding block 54;

the sliding table 4 is arranged on the operating table 1 in a sliding manner, and can move the wood plastic floor and the plastic bottom support on the sliding table 4 to be right below the locking nail element 23 and the drilling element 33.

In the specific implementation, the wood-plastic floor is stacked on the sliding table 4, then the plastic bottom support is placed on the wood-plastic floor, the device is started, the wood-plastic floor and the plastic bottom support are moved to the position right below the drilling element 33 by the sliding table 4, the drilling element 33 is aligned to the fixing hole on the plastic bottom support at the moment, the pneumatic push rod 55 corresponding to the drilling element 33 is started, the sliding block 54 moves downwards on the linear track 53 and finally drives the drilling element 33 to move downwards, a hole with the diameter smaller than the nominal diameter of the screw corresponding to the hole and the depth smaller than the length of the screw corresponding to the hole is drilled on the wood-plastic floor, and in the process, if abnormal conditions that the fixing hole is not a complete through hole and the fixing hole is a blind hole and the like are met, the drilling element 33 can open the fixing hole together during drilling; after the drilling element 33 finishes drilling, the pneumatic push rod 55 resets, then the sliding table 4 continues to move, the fixing hole on the next plastic bottom support is moved to the position right below the drilling element 33, then the pneumatic push rod 55 is started, the drilling element 33 falls down again to drill holes on the wood-plastic floor, and the operation is repeated until all the fixing holes needing to be screwed in by the drilling element 33 are drilled;

then the sliding table 4 continues to move, the wood-plastic floor and the plastic bottom support are moved to the position under the locking screw element 23, at the moment, the locking screw element 23 is aligned with the fixing hole on the plastic bottom support, then the pneumatic push rod 55 corresponding to the locking screw element 23 is started, the sliding block 54 makes the linear track 53 move downwards and finally drives the locking screw element 23 to move downwards, the locking screw element 23 drives the screw to rotate, the screw is driven into the hole drilled by the drilling element 33, the fixing hole which is not completely through is drilled by the drilling element 33, and the hole is drilled at the falling point of the screw, so the posture of the screw when the screw is driven into the wood-plastic floor is not easily influenced by the convex block in the fixing hole, the wood-plastic floor is easily attacked even if the end part of the screw is not sharp, the plastic bottom support and the wood-plastic floor achieve a good fixing effect, and the connection quality between the plastic bottom support and the wood-plastic floor is improved, need not the workman and carry out the secondary and mend the nail, effectively improve production efficiency.

In one embodiment, the first cross bar 22 and the second cross bar 32 are respectively provided with a mounting plate 6, the mounting plate 6 is disposed along the length of the first and second rails 22 and 32, the mounting plate 6 is provided with a plurality of fixed chutes 61 penetrating through the front side and the rear side of the mounting plate 6, the plurality of fixed chutes 61 are arranged along the length direction of the mounting plate 6 and are distributed on the mounting plate 6 up and down, a connecting hole 56 is formed at a position of the seat plate 5 corresponding to the fixed sliding groove 61, the seat plate 5 is fixed on the mounting plate 6 by a nut through the fixed sliding groove 61 and the connecting hole 56 by a bolt sliding, when the position of the seat board 5 on the mounting plate 6 needs to be adjusted, the nut is unscrewed, the seat board 5 moves left and right on the mounting plate 6, after the seat board 5 moves to a specified position, the nut is screwed, and the seat board 5 and the mounting plate 6 are fixed. Design like this, through setting up the mounting panel and seting up fixed spout on the mounting panel, the bedplate can freely be installed in the optional position department of the length direction of mounting panel, can be according to the interval between the adjacent fixed orifices on the different plastics collet, comes to adjust the relative position between bedplate and the mounting panel, and the suitability is strong.

In one embodiment, a sliding portion 57 is disposed at a side portion of the sliding block 54, a sliding rod 58 is disposed on the bottom plate 52 at the bottom of the seat plate 5, one end of the sliding rod 58 penetrates through the sliding portion 57, a spring 59 is sleeved on the sliding rod 58, and the spring 59 is located between the sliding portion 57 and the bottom plate 52. Design like this, when pneumatic push rod promoted the sliding block and slided downwards, the sliding block drove the sliding part and moves down, and the sliding part slided downwards on the sliding bar and makes the spring compression this moment, when pneumatic push rod slided downwards and targets in place and begins to reset, with the help of the elasticity of spring, the sliding block can accomplish to reset rapidly, improve equipment's operating efficiency.

Preferably, the end of the sliding rod 58, which protrudes out of the sliding part 57, is provided with a stopping member 581 for stopping the sliding block 54 from sliding out of the sliding rod 58, and the stopping member 581 may be a nut screwed on the end of the sliding rod 58.

In an embodiment, the mounting plates 6 respectively mounted on the first cross bar 22 and the second cross bar 32 are disposed oppositely, the plurality of locking nail units and the plurality of drilling units are disposed oppositely, and the center distance between the locking nail element 23 and the drilling element 33 is equal to the distance between two fixing holes to be screwed in the front and back directions of the corresponding plastic bottom support. Design like this, not only save the space of operation panel, the slip table is feeding the in-process moreover, can accomplish drilling process and sew into to accomplish good process and link up between the screw process, and the slip table only need remove once can to nail into the screw to the below of lock nail unit with the hole removal that drills, removes the below to the drilling unit with the position of waiting to drill next simultaneously, has improved the production efficiency of equipment greatly.

In one embodiment, a slide rail 11 is provided at a position of the console 1 corresponding to the first upright 21, the slide rail 11 is linearly provided along the front-rear direction of the console 1, a moving block 24 is provided at a position of the bottom of the first upright 21 corresponding to the slide rail 11, and the moving block 24 is slidably provided on the slide rail 11 and is movable along the longitudinal direction of the slide rail 11. Design like this, when the centre-to-centre spacing of needs adjustment locking nail component and drilling component is in order to be suitable for the plastics collet of another specification, the accessible makes the movable block slide on the slip track, and then makes first stand remove on the operation panel to the centre-to-centre spacing of adjustment locking nail component and drilling component makes equipment be applicable to the plastics collet of various different specifications, and the suitability of equipment is strong.

In an embodiment, a groove 12 is formed in the sliding track 11, a screw 13 is rotatably disposed in the groove 12, one end of the screw 13 extends out of the sliding track 11 and is connected to a motor 14, the bottom of the moving block 24 is in transmission fit with the screw 13, and when the screw 13 rotates, the screw 13 drives the moving block 24 to move on the sliding track 11. Since the structure of the bottom of moving block 24 in driving engagement with screw 13 is prior art, for example, the bottom of moving block 24 may be a rack in driving engagement with screw 13. The design is that when the device works, the two motors are controlled to be started simultaneously, and the motors drive the screw rods to rotate so as to enable the moving block to move on the sliding track.

In an embodiment, a plurality of T-shaped sliding grooves 41 are formed in the sliding table 4 along the length direction and the width direction of the sliding table 4, the T-shaped sliding grooves 41 in the length direction of the sliding table 4 and the T-shaped sliding grooves 41 in the width direction of the sliding table 4 are in a cross shape, a plurality of limiting columns 42 are further arranged on the sliding table 4, each limiting column 42 comprises a sliding block 421 and a limiting block 422, the bottom of the sliding block 421 is slidably arranged in the T-shaped sliding grooves 41 and is in limit fit with the T-shaped sliding grooves 41 in the up-down direction, the top of the sliding block 421 extends into the limiting block 422 and is fixedly connected with the limiting block 422 through an inner hexagonal bolt 423, and the limiting block 422 cannot enter the T-shaped sliding grooves 41 from the top of the T-shaped sliding grooves 41. When the limiting column 42 needs to be fixed on the sliding table 4, the inner hexagonal bolt 423 is screwed by an inner hexagonal wrench, and the inner hexagonal bolt 423 enables the sliding block 421 to move upwards in the T-shaped sliding groove 41 and limit the top of the T-shaped sliding groove 41 in the fastening process, and finally the limiting column 42 is fixed on the sliding table 4; when the position of the limiting column 42 on the sliding table 4 needs to be adjusted, the hexagon socket head cap screw 423 is unscrewed by a hexagon socket wrench, the sliding block 421 moves downward in the T-shaped sliding groove 41 to release the limitation between the sliding block 421 and the T-shaped sliding groove 41, at this time, the sliding block 421 slides in the T-shaped sliding groove 41, the sliding block 421 moves to a specified position, and then the hexagon socket head cap screw 423 is screwed. By the design, the sliding table is suitable for wood-plastic floors and plastic bottom supports of various specifications and models, can be adjusted according to the sizes of different wood-plastic floors and different plastic bottom supports, and is high in adaptability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.