阅读说明：本技术 一种木板加工用裁切装置及其工作方法 (Cutting device for wood board processing and working method thereof ) 是由 李可峰 于 2021-06-17 设计创作，主要内容包括：本发明公开一种木板加工用裁切装置,包括切割箱、收集箱和传送机构,所述切割箱固定安装于收集箱顶部,所述切割箱内设置有传送机构,所述传送机构设置于收集箱上方；所述收集箱内两侧对称设置有清洁平台,两个清洁平台之间设置有收集槽。本发明通过在收割箱内设置切割组件和移动组件,实现切割轮横向及竖向移动,便于对传送机构上木板的裁切,提高了木板切割的效率和切割质量,通过在传送机构上设置固定架以及转动筒,两个固定架之间的切割槽便于切割轮对木板进行裁切,避免损坏传送机构,转动筒使得木板在切割结束后可以从传送机构两侧传送出切割箱外,解决了木板在裁切后无法传送的技术问题,提高了切割的效率,实现自动化的切割过程。(The invention discloses a cutting device for processing a wood board, which comprises a cutting box, a collecting box and a conveying mechanism, wherein the cutting box is fixedly arranged at the top of the collecting box, the conveying mechanism is arranged in the cutting box, and the conveying mechanism is arranged above the collecting box; cleaning platforms are symmetrically arranged on two sides in the collecting box, and collecting grooves are formed between the two cleaning platforms. According to the invention, the cutting assembly and the moving assembly are arranged in the harvesting box, so that the cutting wheel can move transversely and vertically, the wood board on the conveying mechanism can be conveniently cut, the wood board cutting efficiency and the wood board cutting quality are improved, the fixing frames and the rotating cylinders are arranged on the conveying mechanism, the cutting grooves between the two fixing frames are convenient for the cutting wheel to cut the wood board, the conveying mechanism is prevented from being damaged, the rotating cylinders can enable the wood board to be conveyed out of the cutting box from two sides of the conveying mechanism after the cutting is finished, the technical problem that the wood board cannot be conveyed after being cut is solved, the cutting efficiency is improved, and the automatic cutting process is realized.)

1. The cutting device for processing the wood board is characterized by comprising a cutting box (100), a collecting box (300) and a conveying mechanism (200), wherein the cutting box (100) is fixedly arranged at the top of the collecting box (300), the conveying mechanism (200) is arranged in the cutting box (100), and the conveying mechanism (200) is arranged above the collecting box (300);

cleaning platforms (302) are symmetrically arranged on two sides in the collecting box (300), a collecting tank (303) is arranged between the two cleaning platforms (302), and a cleaning assembly is arranged above the cleaning platforms (302);

a moving assembly (102) is arranged in the cutting box (100), a cutting assembly (103) is arranged on the moving assembly (102), and a feeding pipe (101) is arranged on one side of the cutting box (100).

2. The cutting device for wood board processing as claimed in claim 1, wherein the cleaning assembly comprises a cleaning motor (306), the cleaning motor (306) is fixedly mounted on a side wall of the collection box (300), an output shaft of the cleaning motor (306) is fixedly connected with a cleaning lead screw (301), threads on two sides of the cleaning lead screw (301) are symmetrically arranged along a middle portion, the cleaning lead screw (301) is rotatably mounted in the collection box (300), two fixing rods (305) are symmetrically arranged on two sides of the cleaning lead screw (301), a brush is fixedly connected to bottoms of the two fixing rods (305), one end of each fixing rod (305) is connected to the cleaning lead screw (301) in a threaded manner, the other end of each fixing rod (305) is slidably mounted on the corresponding sliding rod (304), and the sliding rod (304) is fixedly mounted in the collection box (300).

3. The cutting device for wood board processing according to claim 1, wherein the moving assembly (102) comprises two symmetrically arranged fixing seats (1021), the two fixing seats (1021) are fixedly installed at the top inside the cutting box (100), a moving lead screw (1022) is rotatably installed between the two fixing seats (1021), the end of the moving lead screw (1022) is fixedly connected with an output shaft of a moving motor (1024), the moving motor (1024) is fixedly installed on one of the fixing seats (1021), a sliding rail (1023) is arranged on one side of the moving lead screw (1022), and the sliding rail (1023) is fixedly installed between the two fixing seats (1021).

4. The cutting device according to claim 3, wherein the cutting assembly (103) comprises a moving seat (1031), a lifting cylinder (1032) is fixedly mounted at the bottom of the moving seat (1031), a piston rod of the lifting cylinder (1032) is fixedly connected with a cutting motor, a cutting wheel (1033) is fixedly mounted on an output shaft of the cutting motor, a sliding block (1034) is arranged on one side of the top of the moving seat (1031), a moving block is arranged on the other side of the top of the moving seat (1031), the moving block is in threaded connection with a moving lead screw (1022), and the sliding block (1034) is slidably mounted on a sliding rail (1023).

5. The cutting device for wood board processing according to claim 1, wherein a curtain is arranged on the feeding pipe (101), and a curtain is arranged on one side of the cutting box (100) facing the conveying mechanism (200).

6. The cutting device for wood board processing according to claim 1, wherein the conveying mechanism (200) comprises a frame (201), two rotating shafts (203) are rotatably mounted in the frame (201), driving wheels (204) are respectively sleeved at the end portions of the two rotating shafts (203), the two driving wheels (204) are in transmission connection with a conveying belt (205), a plurality of driven wheels (207) are in transmission connection with the conveying belt (205), the driven wheels (207) are sleeved on a fixed shaft (208), the fixed shaft (208) is rotatably mounted in the frame (201), one rotating shaft (203) is fixedly connected with an output shaft of a conveying motor (206), the conveying motor (206) is fixedly mounted at one side of the frame (201), two fixed frames (209) are arranged in the middle of the frame (201), and rotating cylinders (202) are symmetrically arranged on the two sides of the fixed shaft (208) along the middle portion, the two rotating cylinders (202) are fixedly arranged on a fixed shaft (208).

7. The cutting device for wood board processing according to claim 6, wherein a plurality of the fixed shafts (208) are rotatably mounted on two fixed frames (209), and a cutting groove (211) is arranged between the two fixed frames (209).

8. A working method of a cutting device for processing wood boards is characterized by comprising the following steps:

the method comprises the following steps: putting the wood board into a rotating cylinder (202) of a conveying mechanism (200) from a feeding pipe (101) on one side of a cutting box (100), driving a driving wheel (204) on a rotating shaft (203) to rotate by an output shaft of a conveying motor (206), driving the driving wheel (204) to rotate to drive a conveying belt (205) to transmit, further driving a plurality of driven wheels (207) in the conveying belt (205) to rotate, driving the rotating cylinder (202) on a fixed shaft (208) to rotate by the rotation of the driven wheels (207), and driving the wood board to move towards the other side of the conveying mechanism (200) by the rotating cylinder (202);

step two: when the wood board is moved to the position below the cutting assembly (103), the cutting motor output shaft drives the cutting wheel (1033) to rotate, the lifting cylinder (1032) output shaft drives the cutting motor to move downwards, the cutting wheel (1033) cuts the wood board, the moving motor (1024) output shaft drives the moving lead screw (1022) to rotate, the moving lead screw (1022) rotates to drive the moving seat (1031) to slide on the sliding rail (1023) through the moving block, the cutting wheel (1033) is further driven to longitudinally cut the wood board on the conveying mechanism (200), and after the wood board is cut, the rotating cylinder (202) continues to drive the wood board to move out of the cutting box (100);

step three: an output shaft of the cleaning motor (306) drives the cleaning lead screw (301) to rotate, the cleaning lead screw (301) rotates to drive the fixing rods (305) on the two sides to relatively slide on the sliding rod (304), and sawdust generated by cutting the wood board on the brush cleaning platform (302) at the bottom of the fixing rods (305) is swept into the collecting tank (303).

Technical Field

The invention relates to the technical field of wood board processing, in particular to a cutting device for wood board processing and a working method thereof.

Background

During the processing of wood boards, it is necessary to cut a plurality of wood boards into the same size and shape. Present cutting machine device places the plank in cutting device's blade through the manual work, cuts the plank, and the cutting is not only inefficiency like this, and the plank cuts the quality inequality simultaneously, influences the subsequent processing of plank, and dust and saw-dust splash all around in the plank course of working simultaneously, causes the injury to the operating personnel health when influencing the environment, is unfavorable for the modernization processing demand, can't accomplish to the saw-dust after the plank processing and collects, also is one of present cutting device's problem.

Disclosure of Invention

The invention aims to provide a cutting device for processing a wood board, which solves the following technical problems: (1) through setting up cutting assembly and moving assembly in reaping the case, realize the cutting wheel and move horizontally and vertically, facilitate the cutting to the plank on the transport mechanism, efficiency and cutting quality to improve plank cutting, through setting up mount and rotary drum on the transport mechanism, the cutting slot between two mounts facilitates the cutting wheel to cut the plank, avoid damaging the transport mechanism, the rotary drum makes the plank can be conveyed out of the cutting case from both sides of transport mechanism after cutting, the technical problem that the plank can't be conveyed after cutting is solved, has raised the efficiency of cutting, realize the automatic cutting process; (2) through setting up the clean subassembly in collecting box and the collecting box, the plank is after the cutting, and the saw-dust falls into in the clean platform on the collecting box, and clean subassembly cleans saw-dust to the collecting vat on the clean platform in, accomplishes the collection to the saw-dust, and the recycle of resource, the entry end of pan feeding pipe and cutting box exit end all set up the check apron for seal in airtight space in the plank cutting process, reduced the injury of plank cutting in-process dust to the human body, avoid causing environmental pollution.

The purpose of the invention can be realized by the following technical scheme:

a cutting device for processing a wood board comprises a cutting box, a collecting box and a conveying mechanism, wherein the cutting box is fixedly arranged at the top of the collecting box, the conveying mechanism is arranged in the cutting box, and the conveying mechanism is arranged above the collecting box;

cleaning platforms are symmetrically arranged on two sides in the collecting box, a collecting tank is arranged between the two cleaning platforms, and a cleaning assembly is arranged above the cleaning platforms;

the cutting box is internally provided with a moving assembly, the moving assembly is provided with a cutting assembly, and one side of the cutting box is provided with a feeding pipe.

Further, the cleaning assembly comprises a cleaning motor, the cleaning motor is fixedly mounted on the side wall of the collecting box, an output shaft of the cleaning motor is fixedly connected with a cleaning screw rod, threads on two sides of the cleaning screw rod are symmetrically arranged along the middle part, the cleaning screw rod is rotatably mounted in the collecting box, two fixing rods are symmetrically arranged on two sides of the cleaning screw rod, brushes are fixedly connected to the bottoms of the fixing rods, one end of each fixing rod is connected to the cleaning screw rod in a threaded mode, the other end of each fixing rod is slidably mounted on the corresponding sliding rod, and the sliding rods are fixedly mounted in the collecting box.

Furthermore, the moving assembly comprises two symmetrically arranged fixing seats, the two fixing seats are fixedly installed at the top of the cutting box, a moving lead screw is rotatably installed between the two fixing seats, the end part of the moving lead screw is fixedly connected with an output shaft of a moving motor, the moving motor is fixedly installed on one of the fixing seats, a sliding rail is arranged on one side of the moving lead screw, and the sliding rail is fixedly installed between the two fixing seats.

Further, the cutting assembly comprises a moving seat, a lifting cylinder is fixedly mounted at the bottom of the moving seat, a piston rod of the lifting cylinder is fixedly connected with a cutting motor, a cutting wheel is fixedly mounted on an output shaft of the cutting motor, a sliding block is arranged on one side of the top of the moving seat, a moving block is arranged on the other side of the top of the moving seat, the moving block is in threaded connection with a moving lead screw, and the sliding block is slidably mounted on a sliding rail.

Furthermore, a stop curtain is arranged on the feeding pipe, and a stop curtain is arranged on one side, facing the conveying mechanism, of the cutting box.

Further, transport mechanism includes the frame, two rotation axes are installed to the frame internal rotation, and two rotation axis tip all overlaps and are equipped with the action wheel, two the action wheel transmission is connected in the conveyer belt, the transmission is connected with a plurality of follow driving wheels in the conveyer belt, locate on the fixed axle from the driving wheel cover, the fixed axle rotates and installs in the frame, one of them rotation axis fixed connection conveying motor output shaft, conveying motor fixed mounting is in frame one side, the frame middle part is provided with two mounts, both sides are provided with along the middle part symmetry on the fixed axle and rotate a section of thick bamboo, two it is on the fixed axle to rotate a section of thick bamboo fixed mounting.

Furthermore, a plurality of fixed axles are all rotatably installed on two fixing frames, and a cutting groove is formed between the two fixing frames.

Further, the working method of the cutting device for processing the wood board comprises the following steps:

the method comprises the following steps: putting the wood board into a rotating cylinder of a conveying mechanism from a feeding pipe on one side of a cutting box, starting a conveying motor, driving a driving wheel on a rotating shaft to rotate by an output shaft of the conveying motor, driving a conveying belt to transmit by the rotation of the driving wheel, further driving a plurality of driven wheels in the conveying belt to rotate, driving the rotating cylinder on a fixed shaft to rotate by the rotation of the driven wheels, and driving the wood board to move to the other side of the conveying mechanism by the rotating cylinder;

step two: when the wood board is moved to the position below the cutting assembly, the cutting motor and the lifting cylinder are started, the cutting motor output shaft drives the cutting wheel to rotate, the lifting cylinder output shaft drives the cutting motor to move downwards, the cutting wheel cuts the wood board, the moving motor is started, the moving motor output shaft drives the moving lead screw to rotate, the moving lead screw rotates and drives the moving seat to slide on the sliding rail through the moving block, the cutting wheel is further driven to longitudinally cut the wood board on the conveying mechanism, and after the wood board is cut, the rotating cylinder continues to drive the wood board to move out of the cutting box;

step three: the cleaning motor is started, the cleaning motor output shaft drives the cleaning screw to rotate, the cleaning screw rotates to drive the fixing rods on the two sides to slide on the sliding rod relatively, and the wood chips generated by cutting the wood boards on the brush cleaning platform at the bottoms of the fixing rods are cleaned to the collecting tank.

The invention has the beneficial effects that:

(1) according to the cutting device for processing the wood board, the cutting assembly and the moving assembly are arranged in the harvesting box, so that the cutting wheel can move transversely and vertically, the wood board on the conveying mechanism can be conveniently cut, the wood board cutting efficiency and the wood board cutting quality are improved, the fixing frames and the rotating cylinders are arranged on the conveying mechanism, the cutting groove between the two fixing frames is convenient for the cutting wheel to cut the wood board, the conveying mechanism is prevented from being damaged, the rotating cylinders enable the wood board to be conveyed out of the cutting box from two sides of the conveying mechanism after the cutting is finished, the technical problem that the wood board cannot be conveyed after the cutting is solved, the cutting efficiency is improved, and the automatic cutting process is realized;

(2) through setting up the clean subassembly in collecting box and the collecting box, the plank is after the cutting, and the saw-dust falls into in the clean platform on the collecting box, and clean subassembly cleans saw-dust to the collecting vat on the clean platform in, accomplishes the collection to the saw-dust, and the recycle of resource, the entry end of pan feeding pipe and cutting box exit end all set up the check apron for seal in airtight space in the plank cutting process, reduced the injury of plank cutting in-process dust to the human body, avoid causing environmental pollution.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a cutting device for processing wood boards according to the present invention;

FIG. 2 is a schematic view of the interior of the cutting box of the present invention;

FIG. 3 is a schematic structural view of the moving assembly of the present invention;

FIG. 4 is a schematic view of the construction of the cutting assembly of the present invention;

FIG. 5 is a schematic view of the structure of the transfer mechanism of the present invention;

FIG. 6 is a schematic view of the construction of the conveyor belt of the present invention;

fig. 7 is a schematic view of the structure of the collecting box of the invention.

In the figure: 100. cutting the box; 101. a feeding pipe; 102. a moving assembly; 1021. a fixed seat; 1022. moving the lead screw; 1023. a slide rail; 1024. a moving motor; 103. a cutting assembly; 1031. a movable seat; 1032. a lifting cylinder; 1033. a cutting wheel; 1034. a slider; 200. a transport mechanism; 201. a frame; 202. a rotating cylinder; 203. a rotating shaft; 204. a driving wheel; 205. a conveyor belt; 206. a transfer motor; 207. a driven wheel; 208. a fixed shaft; 209. a fixed mount; 210. a support pillar; 211. cutting the groove; 300. a collection box; 301. cleaning the lead screw; 302. cleaning the platform; 303. collecting tank; 304. a slide bar; 305. fixing the rod; 306. and cleaning the motor.

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. 1-7, the cutting device for wood board processing of the present invention includes a cutting box 100, a collecting box 300 and a conveying mechanism 200, wherein the cutting box 100 is fixedly installed on the top of the collecting box 300, the conveying mechanism 200 is installed in the cutting box 100, and the conveying mechanism 200 is installed above the collecting box 300;

cleaning platforms 302 are symmetrically arranged on two sides in the collecting box 300, a collecting groove 303 is arranged between the two cleaning platforms 302, and a cleaning component is arranged above the cleaning platforms 302;

a moving assembly 102 is arranged in the cutting box 100, a cutting assembly 103 is arranged on the moving assembly 102, and a feeding pipe 101 is arranged on one side of the cutting box 100.

Specifically, the cleaning assembly comprises a cleaning motor 306, the cleaning motor 306 is fixedly arranged on the side wall of the collecting box 300, an output shaft of the cleaning motor 306 is fixedly connected with a cleaning screw 301, threads on two sides of the cleaning screw 301 are symmetrically arranged along the middle part, so that the two fixing rods 305 can move relatively, the cleaning screw 301 is rotatably installed in the collecting box 300, the two fixing rods 305 are symmetrically arranged on the cleaning screw 301 at two sides, the bottom parts of the two fixing rods 305 are fixedly connected with brushes, one end of the fixing rod 305 is connected with the cleaning screw 301 by screw threads, the other end of the fixing rod 305 is slidably installed on the sliding rod 304, the sliding rod 304 is fixedly installed in the collecting box 300, through setting up clean subassembly for the plank is after the cutting, and the saw-dust falls into the clean platform 302 on the collecting box 300, and clean subassembly cleans saw-dust on the clean platform 302 to the collecting vat 303 in, accomplishes the collection to the saw-dust, and the recycle of resource.

Remove subassembly 102 includes the fixing base 1021 that two symmetries set up, two fixing base 1021 fixed mounting are in cutting box 100 top, it installs removal lead screw 1022 to rotate between two fixing base 1021, remove lead screw 1022 tip fixed connection moving motor 1024 output shaft, moving motor 1024 fixed mounting is on one of them fixing base 1021, it is provided with slide rail 1023 to remove lead screw 1022 one side, slide rail 1023 fixed mounting is between two fixing base 1021, remove subassembly 102 cooperation cutting subassembly 103, realize the horizontal and vertical removal of cutting wheel 1033, be convenient for to cutting of plank on transport mechanism 200, the efficiency and the cutting quality of plank cutting have been improved.

The cutting assembly 103 comprises a moving seat 1031, a lifting cylinder 1032 is fixedly mounted at the bottom of the moving seat 1031, the lifting cylinder 1032 is used for driving a cutting wheel 1033 to lift, the flexibility of the cutting wheel 1033 is improved, a piston rod of the lifting cylinder 1032 is fixedly connected with a cutting motor, the cutting wheel 1033 is fixedly mounted on an output shaft of the cutting motor, a sliding block 1034 is arranged on one side of the top of the moving seat 1031, the other side of the top of the moving seat 1031 is provided with a moving block, the moving block is in threaded connection with a moving lead screw 1022, the sliding block 1034 is slidably mounted on a sliding rail 1023, and the cutting assembly 103 is arranged for cutting a wood board.

The check curtains are arranged on the feeding pipe 101, the cutting box 100 is provided with the check curtains towards one side of the conveying mechanism 200, the check curtains at the inlet end of the feeding pipe 101 and the outlet end of the cutting box 100 enable the wood board to be sealed in a closed space in the cutting process, the harm of dust to a human body in the wood board cutting process is reduced, and the environmental pollution is avoided.

The transmission mechanism 200 comprises a frame 201, two rotating shafts 203 are rotatably mounted in the frame 201, driving wheels 204 are respectively sleeved at the end parts of the two rotating shafts 203, the two driving wheels 204 are connected in the transmission belt 205 in a transmission manner, a plurality of driven wheels 207 are connected in the transmission belt 205 in a transmission manner, the driven wheels 207 are sleeved on a fixed shaft 208, the fixed shaft 208 is rotatably mounted in the frame 201, one of them rotation axis 203 fixed connection conveying motor 206 output shaft, conveying motor 206 fixed mounting is in frame 201 one side, frame 201 middle part is provided with two mounts 209, both sides are provided with the rotary drum 202 along the middle part symmetry on fixed axle 208, the rotary drum 202 makes the plank can follow the conveying mechanism 200 both sides after the cutting and convey out outside cutting box 100, the technical problem that the plank can't convey after cutting has been solved, the efficiency of cutting has been improved, realize automatic cutting process, two rotary drums 202 fixed mounting are on fixed axle 208.

Frame 201 one side fixed mounting is on support column 210, and frame 201 opposite side passes through fixed column fixed mounting in cutting box 100 inner wall.

A plurality of fixed axles 208 all rotate to be installed on two mounts 209, are provided with between two mounts 209 and cut groove 211, and the cutting groove 211 between two mounts 209 is convenient for the cutting wheel 1033 to cut the plank, avoids damaging transport mechanism 200.

A working method of a cutting device for processing wood boards comprises the following steps:

the method comprises the following steps: putting the wood boards into a rotating cylinder 202 of a conveying mechanism 200 from a feeding pipe 101 at one side of a cutting box 100, starting a conveying motor 206, driving a driving wheel 204 on a rotating shaft 203 to rotate by an output shaft of the conveying motor 206, driving the driving wheel 204 to rotate to drive a conveying belt 205 to transmit, further driving a plurality of driven wheels 207 in the conveying belt 205 to rotate, driving the rotating cylinder 202 on a fixed shaft 208 to rotate by the rotation of the driven wheels 207, and driving the wood boards to move to the other side of the conveying mechanism 200 by the rotating cylinder 202;

step two: when a wood board moves to the position below the cutting assembly 103, the cutting motor and the lifting cylinder 1032 are started, the output shaft of the cutting motor drives the cutting wheel 1033 to rotate, the output shaft of the lifting cylinder 1032 drives the cutting motor to move downwards, the cutting wheel 1033 cuts the wood board, the moving motor 1024 is started, the output shaft of the moving motor 1024 drives the moving lead screw 1022 to rotate, the moving lead screw 1022 rotates to drive the moving seat 1031 to slide on the sliding rail 1023 through the moving block, the cutting wheel 1033 is further driven to longitudinally cut the wood board on the conveying mechanism 200, and after the wood board is cut, the rotating cylinder 202 continues to drive the wood board to move out of the cutting box 100, so that the wood board is cut;

step three: start cleaning motor 306, cleaning motor 306 output shaft drives clean lead screw 301 and rotates, and clean lead screw 301 rotates the dead lever 305 that drives both sides and slides relatively on slide bar 304, and the saw-dust that the plank cutting produced on the clean platform 302 of brush of dead lever 305 bottom produced to clean the saw-dust to in collecting vat 303, accomplish the collection to the saw-dust, realize the recycle of resource.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.