阅读说明：本技术 一种往复式单板烘干机 (Reciprocating type veneer dryer ) 是由 张明强 林建兴 于 2021-01-18 设计创作，主要内容包括：本发明公开了一种往复式单板烘干机,包括烘干箱体,所述烘干箱体由上层烘干室和下层烘干室拼接而成；所述烘干箱体的左右两侧分别连接有主传动轮组和从传动轮组,所述主传动轮组和从传动轮组之间通过链条相连接；所述主传动轮组与设于烘干箱体上的传输电机的输出轴相连接,所述传输电机与设于烘干箱体上的电控箱电连接；所述链条上按间隔设有若干放料层架,所述放料层架在链条的带动下依次上层烘干室和下层烘干室内往复移动；本发明具有自动上下料机构,节省人工,提高工作效率；对余热进行回收利用,节能；放料层架的设计使上下料更加简便化,同时还具有结构简洁紧凑、制造成本低廉、使用简便的特点。(The invention discloses a reciprocating type veneer dryer, which comprises a drying box body, wherein the drying box body is formed by splicing an upper layer drying chamber and a lower layer drying chamber; the left side and the right side of the drying box body are respectively connected with a main transmission wheel set and a driven transmission wheel set, and the main transmission wheel set and the driven transmission wheel set are connected through a chain; the main transmission wheel set is connected with an output shaft of a transmission motor arranged on the drying box body, and the transmission motor is electrically connected with an electric cabinet arranged on the drying box body; a plurality of material placing shelves are arranged on the chain at intervals, and the material placing shelves are driven by the chain to sequentially reciprocate in the upper-layer drying chamber and the lower-layer drying chamber; the automatic feeding and discharging mechanism is arranged, so that the labor is saved, and the working efficiency is improved; the waste heat is recycled, so that energy is saved; the design of the discharging layer frame enables the feeding and discharging to be simpler and more convenient, and meanwhile, the discharging layer frame has the characteristics of simple and compact structure, low manufacturing cost and simplicity and convenience in use.)

1. A reciprocating veneer dryer is characterized in that: the drying box comprises a drying box body, wherein the drying box body is formed by splicing an upper-layer drying chamber (1) and a lower-layer drying chamber (2); the left side and the right side of the drying box body are respectively connected with a main transmission wheel set (3) and a driven transmission wheel set (4), and the main transmission wheel set (3) and the driven transmission wheel set (4) can rotate relative to the drying box body; the main transmission wheel set (3) is connected with the auxiliary transmission wheel set (4) through a chain (5); the main transmission wheel set (3) is connected with an output shaft of a transmission motor (6) arranged on the drying box body, and the transmission motor (6) is electrically connected with an electric cabinet (7) arranged on the drying box body; a plurality of material placing layer frames (8) are arranged on the chain (5) at intervals, and the material placing layer frames (8) are driven by the chain (5) to sequentially move in the upper-layer drying chamber (1) and the lower-layer drying chamber (2) in a reciprocating mode.

2. The reciprocating veneer dryer according to claim 1, wherein: a feeding mechanism for a drying plate is arranged on the left side of the drying box body, the feeding mechanism comprises a rack (91), a first lifting sucker component (92) and a second lifting sucker component (93) for feeding are arranged on the rack (91), and the first lifting sucker component (92) is positioned on the right side of the second lifting sucker component (93); the first lifting sucker assembly (92) and the second lifting sucker assembly (93) can move back and forth relative to the rack (91) respectively; a material lifting platform (94) and a feeding conveyer belt (95) are arranged below the first lifting sucker component (92); the feeding conveyer belt (95) extends to the lower part of the second lifting sucker component (93).

3. The reciprocating veneer dryer according to claim 1, wherein: the left side of the drying box body is provided with a discharging mechanism used for a drying plate, the discharging mechanism comprises a discharging conveying belt (96) and a discharging stacker crane (97) located in front of the discharging conveying belt (96), and one end of the discharging conveying belt (96) is located below the discharging end of the drying box body.

4. The reciprocating veneer dryer according to claim 1, wherein: the material placing layer frame (8) comprises two main ventilation rib plates (81) arranged at intervals, screw holes (82) are formed in one ends of the two main ventilation rib plates (81), the two main ventilation rib plates (81) are connected through a plurality of rectangular pipes (83) arranged transversely, and the upper surfaces of the rectangular pipes (83) are connected through a plurality of rib plates (84) arranged longitudinally; the bottom of the rectangular tube (83) at the uppermost end is connected with more than one anti-falling retaining plate (85), and the upper surface of the rectangular tube (83) at the lowermost end is connected with a supporting plate (86) for supporting a drying plate (88); the anti-falling retaining plate (85) is in an inverted L shape; the supporting plate (86) is V-shaped.

5. The reciprocating veneer dryer according to claim 4, wherein: a plurality of vent holes (87) are arranged on the main ventilation rib plate (81) at intervals.

6. The reciprocating veneer dryer according to claim 2, wherein: the first lifting sucker assembly (92) comprises a first lifting seat (921), a first moving wheel (922) matched with the rack (91) is arranged on the first lifting seat (921), and the first moving wheel (922) moves on the rack (91); first lift seat (921) is connected with first elevator motor (923), be connected with first sucking disc (924) that are used for adsorbing the drying plate on the motor shaft of first elevator motor (923).

7. The reciprocating veneer dryer according to claim 2, wherein: the second lifting sucker assembly (93) comprises a second lifting seat (931), a second moving wheel (932) matched with the rack (91) is arranged on the second lifting seat (931), and the second moving wheel (932) moves on the rack (91); the second lifting seat (931) is connected with a second lifting motor (933), and a motor shaft of the second lifting motor (933) is connected with a second sucker (935) used for adsorbing a drying plate through an extension frame (934).

8. The reciprocating veneer dryer according to claim 1, wherein: the upper-layer drying chamber (1) comprises an upper box body (11), the upper box body (11) is internally divided into an upper drying area (13) and an upper ventilation area (14) through a partition plate (12), air deflectors (15) are respectively arranged on the left inner side and the right inner side of the upper drying area (13), and a left air channel area (16) and a right air channel area (17) are formed between the air deflectors (15) and the left inner wall and the right inner wall of the upper drying area (13); a plurality of axial fans (18) and a plurality of first radiators (19) are arranged in the upper ventilating area (14); the top of the upper box body (11) is provided with a moisture discharging port (110); a plurality of first radiators (19) in the upper ventilation area (14) are arranged in an S shape; dryer heat energy comes from steam, steam passes through the steam pipe and gets into first radiator (19), axial fan (18) blow left wind channel district (16) to the heat energy of first radiator (19), evenly pass to last drying area (13) through aviation baffle (15) and dry the board to the stoving, unnecessary heat can pass through right wind channel district (17) owing to the effect of wind pressure, and the negative pressure of axial fan (18) can continue to draw away right wind channel district (17) heat energy, so form a complete wind channel circulation process.

9. The reciprocating veneer dryer according to claim 1, wherein: the lower-layer drying chamber (2) comprises a lower box body (21), a plurality of second radiators (22) are respectively arranged on the left inner side wall and the right inner side wall of the lower box body (21), and the second radiators (22) are arranged in an S shape; an air return pipeline (23) is arranged on the lower box body (21), and an air outlet (26) and an air return opening (27) which are communicated with the lower box body (21) are arranged on the air return pipeline (23); a moisture-removing turning plate (29) is arranged on the air return pipeline (23), and the moisture-removing turning plate (29) is connected with a turning plate cylinder (210) arranged on the air return pipeline (23); baffle (24) that are used for keeping out the wind are equipped with to the side of second radiator (22), the rear of second radiator (22) is equipped with fan (25), fan (25) work, in box (21) down in second radiator (22) heat energy transmission, because baffle (24) effect, finally form the wind channel flow direction of S-shaped, through return air inlet (27), be equipped with drainage fan (28) in return air duct (23) and assist the wind channel circulation, get back to down in box (21) by air outlet (26) again, so form a complete wind channel circulation process.

10. The reciprocating veneer dryer according to claim 1, wherein: the chain (5) is connected with a fixing plate (51) for fixing the material placing layer rack (8).

Technical Field

The invention relates to the technical field of dryers, in particular to a reciprocating type single-board dryer.

Background

The veneer dryer is a main device for producing plywood, the moisture content of veneers which are just peeled off in a rotary mode is very high, the veneer dryer is mainly used for drying the veneers, and the moisture content of the veneers is reduced by means of economic and minimum loss of the veneers, so that the veneer dryer meets the process requirement.

The existing single-board dryer heats the whole inside of the drying oven and blows air to the whole drying oven, so that the temperature is increased or the power of a fan is increased at the speed of accelerating the drying of single boards, the energy consumption is extremely high, and the production cost of enterprises is high.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a practical reciprocating type single-plate dryer with simple structure and convenient operation.

The invention is realized by the following modes:

a reciprocating type veneer dryer comprises a drying box body, wherein the drying box body is formed by splicing an upper layer drying chamber and a lower layer drying chamber; the left side and the right side of the drying box body are respectively connected with a main transmission wheel set and a driven transmission wheel set, and the main transmission wheel set and the driven transmission wheel set can rotate relative to the drying box body respectively; the main transmission wheel set and the auxiliary transmission wheel set are connected through a chain; the main transmission wheel set is connected with an output shaft of a transmission motor arranged on the drying box body, and the transmission motor is electrically connected with an electric cabinet arranged on the drying box body; a plurality of material placing layer frames are arranged on the chain at intervals, and the material placing layer frames are driven by the chain to move in the upper-layer drying chamber and the lower-layer drying chamber in a reciprocating mode.

Furthermore, a feeding mechanism for drying the plate is arranged on the left side of the drying box body, the feeding mechanism comprises a rack, a first lifting sucker assembly and a second lifting sucker assembly for feeding are arranged on the rack, and the first lifting sucker assembly is positioned on the right side of the second lifting sucker assembly; the first lifting sucker assembly and the second lifting sucker assembly can move back and forth relative to the rack respectively; a material lifting platform and a feeding conveyer belt are arranged below the first lifting sucker assembly; the feeding conveyer belt extends to the lower part of the second lifting sucker component.

Furthermore, the left side of the drying box body is provided with a discharging mechanism used for the drying plate, the discharging mechanism comprises a discharging conveying belt and a discharging stacker crane located in front of the discharging conveying belt, and one end of the discharging conveying belt is located below the discharging end of the drying box body.

Furthermore, the material placing layer frame comprises two main ventilation rib plates arranged at intervals, screw holes are formed in one ends of the two main ventilation rib plates respectively, the two main ventilation rib plates are connected through a plurality of rectangular pipes arranged transversely, and the upper surfaces of the rectangular pipes are connected through a plurality of rib plates arranged longitudinally; the bottom of the rectangular tube at the uppermost end is connected with more than one anti-falling retaining plate, and the upper surface of the rectangular tube at the lowermost end is connected with a supporting plate for supporting the drying plate; the anti-falling retaining plate is in an inverted L shape; the supporting plate is V-shaped.

Furthermore, a plurality of vent holes are arranged on the main ventilation rib plate at intervals.

Furthermore, the first lifting sucker assembly comprises a first lifting seat, a first moving wheel matched with the rack is arranged on the first lifting seat, and the first moving wheel moves on the rack; the first lifting seat is connected with a first lifting motor, and a motor shaft of the first lifting motor is connected with a first sucker for adsorbing the drying plate.

Furthermore, the second lifting sucker assembly comprises a second lifting seat, a second moving wheel matched with the rack is arranged on the second lifting seat, and the second moving wheel moves on the rack; the second lifting seat is connected with a second lifting motor, and a motor shaft of the second lifting motor is connected with a second sucker for adsorbing the drying plate through an extending frame.

Furthermore, the upper-layer drying chamber comprises an upper box body, the upper box body is divided into an upper drying area and an upper ventilating area by a partition plate, air deflectors are arranged on the left inner side and the right inner side of the upper drying area respectively, and a left air channel area and a right air channel area are formed between the air deflectors and the left inner wall and the right inner wall of the upper drying area; a plurality of axial flow fans and a plurality of first radiators are arranged in the upper ventilating area; the top of the upper box body is provided with a moisture discharging port; a plurality of first radiators in the upper ventilation area are arranged in an S shape; the dryer heat energy comes from steam, and steam passes through the steam pipe and gets into first radiator, and axial fan blows the heat energy of first radiator to left wind channel district, evenly passes to the heat through the aviation baffle and dries the stoving board in the last drying area, and unnecessary heat can pass through right wind channel district because the effect of wind pressure to axial fan's negative pressure can continue to take away right wind channel district heat energy, so forms a complete wind channel circulation process.

Furthermore, the lower-layer drying chamber comprises a lower box body, wherein a plurality of second radiators are respectively arranged on the left inner side wall and the right inner side wall of the lower box body, and the second radiators are arranged in an S shape; the lower box body is provided with an air return pipeline, and the air return pipeline is provided with an air outlet and an air return inlet which are communicated with the lower box body; the air return pipeline is provided with a moisture-removing turning plate, and the moisture-removing turning plate is connected with a turning plate cylinder arranged on the air return pipeline; the side of second radiator is equipped with the baffle that is used for keeping out the wind, the rear of second radiator is equipped with the fan, and fan work is internal to second radiator heat transmission nowel, because baffle effect, finally forms the wind channel flow direction of S-shaped, and through the return air inlet, be equipped with the supplementary wind channel circulation of drainage fan in the return air duct, get back to nowel by the air outlet again, so form a complete wind channel circulation process.

Furthermore, a fixing plate for fixing the material placing layer frame is connected to the chain.

The invention has the beneficial effects that: the automatic feeding and discharging mechanism is arranged, so that the labor is saved, and the working efficiency is improved; the waste heat is recycled, so that energy is saved; the design of the discharging layer frame enables the feeding and discharging to be simpler and more convenient, and meanwhile, the discharging layer frame has the characteristics of simple and compact structure, low manufacturing cost and simplicity and convenience in use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

FIG. 2 is a front view of the structure of the present invention;

FIG. 3 is a top view of the inventive structure;

FIG. 4 is a schematic view of a feeding mechanism according to the present invention;

FIG. 5 is a front view of the structure of the material accommodating shelf of the present invention;

FIG. 6 is a side view of the structure of the material accommodating shelf of the present invention;

FIG. 7 is a schematic structural view of an upper drying chamber according to the present invention;

FIG. 8 is a sectional view of an upper drying chamber according to the present invention;

FIG. 9 is a schematic view of a lower drying chamber according to the present invention;

FIG. 10 is a schematic view of the moisture removing flap of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

a reciprocating type veneer dryer is shown in figures 1-10 and comprises a drying box body, wherein the drying box body is formed by splicing an upper drying chamber 1 and a lower drying chamber 2; the left side and the right side of the drying box body are respectively connected with a main transmission wheel set 3 and a driven transmission wheel set 4, and the main transmission wheel set 3 and the driven transmission wheel set 4 can rotate relative to the drying box body respectively; the main transmission wheel set 3 is connected with the auxiliary transmission wheel set 4 through a chain 5; the main transmission wheel set 3 is connected with an output shaft of a transmission motor 6 arranged on the drying box body, and the transmission motor 6 is electrically connected with an electric cabinet 7 arranged on the drying box body; the transmission motor 6 works to drive the main transmission wheel set 3 to rotate, and the main transmission wheel set 3 drives the auxiliary transmission wheel set 4 to work through the chain 5.

Specifically, be equipped with a plurality of blowing shelves 8 according to the interval on the chain 5, blowing shelves 8 reciprocating motion in upper drying chamber 1 and the lower floor drying chamber 2 in proper order under the drive of chain 5.

Further, in order to fix the material placing shelves 8 conveniently, a fixing plate 51 for fixing the material placing shelves 8 is connected to the chain 5.

Further, the material placing layer frame 8 comprises two main ventilation rib plates 81 arranged at intervals, screw holes 82 connected with the fixing plate 51 are respectively arranged at one ends of the two main ventilation rib plates 81, the two main ventilation rib plates 81 are connected through a plurality of rectangular pipes 83 arranged transversely, and the upper surfaces of the rectangular pipes 83 are connected through a plurality of rib plates 84 arranged longitudinally; the bottom of the rectangular tube 83 at the uppermost end is connected with more than one anti-falling and anti-backing plate 85, and the anti-falling and anti-backing plate 85 is in an inverted L shape; the upper surface of the rectangular tube 83 located at the lowermost end is connected with a support plate 86 for supporting a drying plate 88, and the support plate 86 is V-shaped to facilitate supporting the drying plate 88.

Furthermore, a plurality of vent holes 87 are arranged on the main ventilation rib plate 81 at intervals to enhance the ventilation effect of drying.

Specifically, a feeding mechanism for drying the board is arranged on the left side of the drying box body, the feeding mechanism comprises a rack 91, a first lifting sucker component 92 and a second lifting sucker component 93 for feeding are arranged on the rack 91, and the first lifting sucker component 92 is positioned on the right side of the second lifting sucker component 93; the first lifting sucker assembly 92 and the second lifting sucker assembly 93 can move back and forth relative to the rack 91 respectively; a material lifting platform 94 and a feeding conveyer belt 95 are arranged below the first lifting sucker assembly 92; the feed conveyor belt 95 extends below the second lifting chuck assembly 93.

Specifically, the left side of the drying box body is provided with a discharging mechanism for the drying plate, the discharging mechanism comprises a discharging conveyor belt 96 and a discharging stacker 97 located in front of the discharging conveyor belt 96, and one end of the discharging conveyor belt 96 is located below the discharging end of the drying box body.

Further, the first lifting suction cup assembly 92 comprises a first lifting seat 921, a first moving wheel 922 matched with the rack 91 is arranged on the first lifting seat 921, and the first moving wheel 922 moves on the rack 91; first lift seat 921 is connected with first elevator motor 923, be connected with the first sucking disc 924 that is used for adsorbing the drying plate on the motor shaft of first elevator motor 923.

Further, the second lifting chuck assembly 93 comprises a second lifting seat 931, a second moving wheel 932 matched with the frame 91 is arranged on the second lifting seat 931, and the second moving wheel 932 moves on the frame 91; the second lifting seat 931 is connected with a second lifting motor 933, and a motor shaft of the second lifting motor 933 is connected with a second suction cup 935 used for adsorbing a drying plate through an extension frame 934.

During operation, first sucking disc 924 adsorbs the stoving board of material lift platform 94, then removes the top of feeding conveyer belt 95 through first removal wheel 922, and then first sucking disc 924 is transferred the stoving board to feeding conveyer belt 95 on, and feeding conveyer belt 95 carries the top of second sucking disc 935 with the stoving board, and second sucking disc 935 removes on blowing shelf 8 through second removal wheel 932 with its absorption back.

Further, the upper-layer drying chamber 1 comprises an upper box body 11, the upper box body 11 is internally divided into an upper drying area 13 and an upper ventilation area 14 through a partition plate 12, air deflectors 15 are respectively arranged on the left inner side and the right inner side of the upper drying area 13, and a left air channel area 16 and a right air channel area 17 are formed between the air deflectors 15 and the left inner wall and the right inner wall of the upper drying area 13; a plurality of axial fans 18 and a plurality of first radiators 19 are arranged in the upper ventilating area 14; the top of the upper box body 11 is provided with a moisture discharging port 110; the axial flow fan 18 drives the steam to be guided to the first radiator 19, and then the steam circulates from the left air channel area 16, the upper drying area 13, the right air channel area 17 and the upper ventilating area 14 in sequence, so that the effect of recycling the steam is achieved; a plurality of first radiators 19 in the upper ventilation zone 14 are arranged in an S shape; the heat energy of the dryer comes from steam, the steam enters the first radiator 19 through the steam pipe, the axial flow fan 18 blows the heat energy of the first radiator 19 to the left air duct area 16, the heat is uniformly transferred to the upper drying area 13 through the air deflector 15 to dry the drying plate, the redundant heat can pass through the right air duct area 17 due to the action of air pressure, and the negative pressure of the axial flow fan 18 can continuously pump away the heat energy of the right air duct area 17, so that a complete air duct circulation process is formed.

Further, the lower layer drying chamber 2 comprises a lower box body 21, the left inner side wall and the right inner side wall of the lower box body 21 are respectively provided with a plurality of second radiators 22, and the plurality of second radiators 22 are arranged in an S shape; an air return pipeline 23 is arranged on the lower box body 21, and an air outlet 26 and an air return opening 27 which are communicated with the lower box body 21 are arranged on the air return pipeline 23; the air return pipeline 23 is provided with a moisture-removing turning plate 29, the moisture-removing turning plate 29 is connected with a turning plate cylinder 210 arranged on the air return pipeline 23, and the turning plate cylinder 210 drives the moisture-removing turning plate 29 to open and close, so that moisture in the air return pipeline 23 is discharged; the side of the second radiator 22 is provided with a baffle 24 for shielding wind, the rear of the second radiator 22 is provided with a fan 25, the fan 25 works to drive the heat energy of the second radiator 22 into the lower box 21, and finally an S-shaped air duct flow direction is formed under the action of the baffle 24, and a drainage fan 28 is arranged in the air return pipeline 23 to assist air duct circulation through an air return port 27 and then returns into the lower box 21 through an air outlet 26, so that a complete air duct circulation process is formed.

When the drying machine works, the first lifting sucker component 92 takes materials from the material lifting platform 94 and puts the materials on the feeding conveyer belt 95, the second lifting sucker component 93 automatically puts the materials on the discharging layer rack 8 from the feeding conveyer belt 95, the discharging layer rack 8 rotates gradually along with the chain 5, when the next discharging layer rack 8 comes, the first lifting sucker component 92 continues to discharge, which is a continuous process, the middle transmission motor 6 does not stop, the motion direction of the chain 5 gradually changes from circular motion to horizontal motion along with the position, the discharging layer rack 8 also changes, because the discharging layer rack 8 is fixed on the chain 5 and enters the upper layer drying chamber 1, at the moment, the drying plate comes to the rear end part of the drying machine along with the discharging layer rack 8, along with the clockwise rotation of the chain 5, the discharging layer rack 8 also changes from the original linear motion to circular motion, due to the action of gravity, the drying plate naturally drops on the reverse side of the other discharging layer rack 8 which is close to, because there is the anti-drop stopping board 85 on the blowing layer frame 8, the stoving board can not break away from blowing layer frame 8, then gets into lower floor's drying chamber 2, and the stoving board has come the front end portion of drying-machine along with blowing layer frame 8 this moment, along with chain 5 clockwise rotation, the stoving board drops on ejection of compact conveyer belt 96, along with the belt on ejection of compact conveyer belt 96 transmits ejection of compact hacking machine 97 department, and the work of circulation is simple and convenient practical.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.