Summary of the invention
The purpose of the present invention is to provide a kind of stator double-station Wrapping machine, with overcome existing Wrapping machine be suitble to small line footpath,
Winding displacement is irregular and the deficiency of automatic coupling tongs line, and the present invention, which can satisfy coil winding machine line footpath 1.0mm or more, can guarantee to arrange
Line is neat, and has automatic coupling band tongs line function, and for product, final coil configuration can neatly make volume-diminished,
The problem of winding process slanders line can also be reduced.
To achieve the above object, the invention provides the following technical scheme: a kind of stator double-station Wrapping machine, including rack,
Side is equipped with thread managing table on the rack, is respectively equipped on thread managing table with lower component:
The winding angle that two coiling nozzles carry out X-axis, Y-axis and Z-direction angular adjustment can be controlled with two coiling nozzles and simultaneously
Degree adjusts component;
Two groups of product indexing index dial components cooperated respectively with a coiling nozzle of corresponding position, wherein each set product is indexable
Index dial component is to have more than one product winding slot, and can carry out different U shaft angle degree according to product winding difference
Guarantee that corresponding product winding slot is directed at the central axis of corresponding coiling nozzle after rotation, makes coiling nozzle smoothly in product coiling notch
Move up and down the structure realized and carry out coiling to product;
It is respectively arranged on above corresponding product indexing index dial component and scissors mouth is towards product winding slot, and can be to product coiling
Two trimming components that extra the end of a thread around set product after complete line on slot is cut short;
It is respectively arranged in front of coiling angular adjustment component and is located at two groups of clamp groups of the side of corresponding coiling angular adjustment component
Part, and each group of wire clipping component is to avoid the end of a thread from going inside line packet, while stepping up line after complete line for stepping up the end of a thread,
The location structure of the smooth trimming of energy when to trimming component one positioning.
Further, for operating easily, and overall structure is simpler, each product indexing index dial component includes one
The output shaft of a U axis rotating electric machine being placed in below thread managing table, the U axis rotating electric machine is connected with connection behind thread managing table top
Axis device is connected with indexable main shaft above the shaft coupling, is connected on indexable main shaft with more than one product winding slot
Index plate is equipped with an indexable spindle box above thread managing table, and two shaft couplings are placed in indexable spindle box and part is stretched out and turned
Position spindle box, and two indexable main shafts are placed in above indexable spindle box, are equipped with an original in the side of each indexable main shaft
Point inductive switching locator.
Further, for operating easily, and overall structure is simpler, two groups of wire clipping components are each attached to indexable spindle box
On, and the wire clipping component includes the backing plate being fixed on above indexable spindle box, L-type connecting plate is fixed on backing plate, in L
The side of type connecting plate is equipped with clamp cylinder, is equipped with the tension seat of the second clamp of band head, the folder in the other side of L-type connecting plate
The output shaft of line cylinder sequentially pass through L-type connecting plate side and tension seat after be connected with the L-type for being able to carry out and moving horizontally
Clamp head, the second clamp head and the cooperation of L-type clamp head constitute clamp mouth.
Further, for operating easily, and overall structure is simpler, the coiling angular adjustment component includes being set to
Y-axis driving motor on thread managing table, being connected on the output shaft of the Y-axis driving motor can make two coiling nozzles in Y-axis
It is mobile to realize the main coiling table top being moved forward and backward on the relative position of index plate, X is equipped in the side of main coiling table top
Axis driving motor, being connected on the output shaft of X-axis driving motor can make two coiling nozzles are mobile on Z axis to realize in indexing
The auxiliary coiling table top moved left and right on the relative position of disk is equipped with Z axis vertical columns in the top of auxiliary coiling table top, in Z
The side of axis vertical columns is equipped with two parallel first straight line sliding rail rails, two first straight line sliding rails towards the position of index plate
Rail is longitudinally disposed, and column slide plate is slidably connected between two first straight line sliding rails, and two coiling nozzles are respectively separated setting and exist
On column slide plate, it is equipped with Z axis driving motor in the outside of Z axis vertical columns, the top in Z axis vertical columns is equipped with the first skin
Band synchronizing wheel, be connected with belt tensioning mechanism on the outside of the first belt synchronizing wheel, the lower section in Z axis vertical columns be equipped with
Second belt synchronizing wheel of the output axis connection of Z axis driving motor, and the first belt tensioning mechanism and the second belt synchronizing wheel it
Between be cased with belt pulley, the positioning sleeve that move up and down can be driven by belt pulley by being equipped at the back side of column slide plate.
Further, for operating easily, and overall structure is simpler, it is equipped with two levels on thread managing table and interval is set
The second straight line sliding rail set, and the lower surface of the main coiling table top is slidably connected between two second straight line sliding rails, in master
The upper surface of coiling table top is equipped with two spaced third line slide rails, and the lower surface sliding of the auxiliary coiling table top
It is connected between two third line slide rails.
Further, in order to improve dust-proof effect, there is X-axis dust cover in the output outer shaft sleeve of X-axis driving motor, driven in Y-axis
The output outer shaft sleeve of dynamic motor has Y-axis dust cover.
Further, for operating easily, and overall structure is simpler, the trimming component includes the fixed frame of L-type,
It is equipped with trimming cylinder in the side of fixed frame, is equipped with and is fixed on fixed frame and to inclining above index plate in the front end of trimming cylinder
The 4th oblique line slide rail slidably connects cutting assemblies of the scissors bit towards index plate, institute above the 4th line slide rail
The output shaft for stating trimming cylinder is connect with cutting assemblies.
Further, for operating easily, and overall structure is simpler, crimping bracket, institute are equipped in the top of thread managing table
State the pushing positioning component for being respectively equipped with and capable of being pushed on crimping bracket to corresponding indexable disk center, the pushing positioning
Component includes set on crimping bracket lower surface and the crimping head that can cooperate with index plate and the pressure set on crimping bracket side
Line cylinder, the output shaft of the crimping cylinder are connected with the cage plate for being placed on crimping head and crimping head capable of being driven to move up and down,
The fixed frame is fixed on crimping bracket by connecting rod.
Further, in order to improve dust-proof effect, facilitate operation and guiding role can be played, before the top of rack is equipped with
It is afterwards the big dust cover of opening, is additionally provided with the preceding platen extended forward on the rack, is additionally provided with is located behind relatively on the rack
Two groups of wire guide idler wheel mechanisms in preceding platen opposite, each group of wire guide idler wheel mechanism are matched with corresponding coiling nozzle
It closes.
Compared with prior art, the present invention can overcome existing Wrapping machine to be suitble to small line footpath, winding displacement irregular and automatic extension
The deficiency of hook tongs line, the present invention, which can satisfy coil winding machine line footpath 1.0mm or more, can guarantee that winding displacement is neat, and have automatic extension
Hook strip tongs line function, for product, final coil configuration can neatly make volume-diminished, can also reduce winding process and slander
The problem of line.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of overall structure stereogram of stator double-station Wrapping machine in the present embodiment 1;
Fig. 2 is the product layout structural schematic diagram in a direction above thread managing table in embodiment 1;
Fig. 3 is the product layout structural schematic diagram in another direction above thread managing table in embodiment 1;
Structural schematic diagram of the Fig. 4 for stator double-station Wrapping machine a kind of in the present embodiment 1 when without big dust cover is installed;
Fig. 5 is the structural schematic diagram of product indexing index dial component in embodiment 1;
Fig. 6 is the internal structure cross-sectional view of product indexing index dial component in embodiment 1;
Fig. 7 is the structural schematic diagram of wire clipping component in embodiment 1;
Fig. 8 is the structural perspective of coiling angular adjustment component in embodiment 1;
Fig. 9 is the attachment structure schematic diagram of Z axis driving motor and coiling nozzle in Fig. 8;
Figure 10 is the schematic diagram of internal structure of the connection relationship of Z axis driving motor and coiling nozzle;
Figure 11 is the structural schematic diagram of trimming component in embodiment 1;
Figure 12 is the structural schematic diagram that positioning component is pushed in embodiment 1.
In figure: rack 1, thread managing table 2, crimping bracket 2-1, push positioning component 2-2, crimping head 2-3, crimping cylinder 2-4,
Cage plate 2-5, connecting rod 2-6, coiling angular adjustment component 3, Y-axis driving motor 3-1, main coiling table top 3-2, X-axis driving motor 3-
3, auxiliary coiling table top 3-4, Z axis vertical columns 3-5, first straight line sliding rail rail 3-6, column slide plate 3-7, Z axis driving motor 3-8,
First belt synchronizing wheel 3-9, belt tensioning mechanism 3-10, the second belt synchronizing wheel 3-11, belt pulley 3-12, positioning sleeve 3-13,
Second straight line sliding rail 3-14, third line slide rail 3-15, X-axis dust cover 3-16, Y-axis dust cover 3-17, coiling nozzle 4, product turn
Position index dial component 5, U axis rotating electric machine 5-1, shaft coupling 5-2, indexable main shaft 5-3, index plate 5-4, indexable spindle box 5-5, original
Point inductive switching locator 5-6, product winding slot 6, trimming component 7, the fixed frame 7-1 of L-type, trimming cylinder 7-2, the 4th straight line
Sliding rail 7-4, cutting assemblies 7-5, wire clipping component 8, backing plate 8-1, clamp cylinder 8-2, L-type connecting plate 8-3, the second clamp head 8-4,
Tension seat 8-5, L-type clamp head 8-6, clamp mouth 8-7, big dust cover 9, preceding platen 10, wire guide idler wheel mechanism 11.
Embodiment 1:
As Figure 1-Figure 4, a kind of stator double-station Wrapping machine provided in this embodiment, including rack 1, set above rack 1
There is thread managing table 2, be respectively equipped on thread managing table 2 with lower component:
The coiling that two coiling nozzles 4 carry out X-axis, Y-axis and Z-direction angular adjustment can be controlled with two coiling nozzles 4 and simultaneously
Angular adjustment component 3;
Two groups of product indexing index dial components 5 cooperated respectively with a coiling nozzle 4 of corresponding position, wherein each set product turns
Position index dial component 5 is to have more than one product winding slot 6, and can carry out different U shaft angles according to product winding difference
Guarantee that corresponding product winding slot 6 is directed at the central axis of corresponding coiling nozzle 4 after the rotation of degree, makes coiling nozzle 4 smoothly in product
6 mouthfuls of the winding slot structures realized and carry out coiling to product that move up and down;
The top of corresponding product indexing index dial component 5 and scissors mouth are respectively arranged on towards product winding slot 6, and can to product around
Two trimming components 7 that extra the end of a thread around set product after complete line on wire casing 6 is cut short;
It is respectively arranged on 3 front of coiling angular adjustment component and is located at two groups of clamps of the side of corresponding coiling angular adjustment component 3
Component 8, and each group of wire clipping component 8 is to avoid the end of a thread from going inside line packet, while stepping up after complete line for stepping up the end of a thread
Line, the location structure of the smooth trimming of energy when to trimming component 7 one positioning.
As shown in Figure 5, Figure 6, further, for operating easily, and overall structure is simpler, each product indexing point
Scale component 5 includes the U axis rotating electric machine 5-1 for being placed in 2 lower section of thread managing table, and the output shaft of the U axis rotating electric machine 5-1 passes through
It is connected with shaft coupling 5-2 after wearing 2 top of thread managing table, indexable main shaft 5-3 is connected with above the shaft coupling 5-2, it is main in indexing
It is connected with the index plate 5-4 with more than one product winding slot 6 on axis 5-3, an indexable spindle box is equipped with above thread managing table 2
5-5, two shaft coupling 5-2 are placed in indexable spindle box 5-5 and indexable spindle box 5-5, and two indexable main shaft 5-3 are stretched out in part
It is placed in above indexable spindle box 5-5, is equipped with an origin switch induction locator 5- in the side of each indexable main shaft 5-3
6。
As shown in fig. 7, further, for operating easily, and overall structure is simpler, two groups of wire clipping components 8 are fixed
On indexable spindle box 5-5, and the wire clipping component 8 includes the backing plate 8-1 being fixed on above indexable spindle box 5-5, is being padded
It is fixed with L-type connecting plate 8-3 on plate 8-1, clamp cylinder 8-2 is equipped in the side of L-type connecting plate 8-3, in L-type connecting plate 8-3
The other side be equipped with band the second clamp head 8-4 tension seat 8-5, the output shaft of the clamp cylinder 8-2 sequentially pass through L-type connection
The L-type clamp head 8-6 for being able to carry out and moving horizontally, the second clamp head are connected with after the side of plate 8-3 and tension seat 8-5
8-4 and L-type clamp head 8-6 cooperation constitutes clamp mouth 8-7.
As shown in Fig. 8, Fig. 9, Figure 10, Fig. 4, further, for operating easily, and overall structure is simpler, described
Coiling angular adjustment component 3 includes the Y-axis driving motor 3-1 on thread managing table 2, the output shaft of the Y-axis driving motor 3-1
On be connected with two coiling nozzles 4 mobile realize in Y-axis can be made to be moved forward and backward on the relative position of index plate 5-4
Main coiling table top 3-2 is equipped with X-axis driving motor 3-3 in the side of main coiling table top 2, in the output shaft of X-axis driving motor 3-3
On be connected with two coiling nozzles 4 mobile realize on Z axis can be made to be moved left and right on the relative position of index plate 5-4
Auxiliary coiling table top 3-4 is equipped with Z axis vertical columns 3-5 in the top of auxiliary coiling table top 3-4, in the side of Z axis vertical columns 3-5
It is longitudinal that two parallel first straight line sliding rail rail 3-6, two first straight line sliding rail rail 3-6 are equipped with towards the position of index plate 5-4
Setting, slidably connects column slide plate 3-7 between two first straight line sliding rail 3-6, and two coiling nozzles 4 are respectively separated setting and exist
On column slide plate 3-7, it is equipped with Z axis driving motor 3-8 in the outside of Z axis vertical columns 3-5, it is upper in Z axis vertical columns 3-5
Side is equipped with the first belt synchronizing wheel 3-9, belt tensioning mechanism 3-10 is connected on the outside of the first belt synchronizing wheel 3-9, in Z axis
Lower section in vertical columns 3-5 is equipped with the second belt synchronizing wheel 3-11 with the output axis connection of Z axis driving motor 3-8, and the
It is cased with belt pulley 3-12 between one belt tensioning mechanism 3-10 and the second belt synchronizing wheel 3-11, at the back side of column slide plate 3-7
Equipped with the positioning sleeve 3-13 that can be moved up and down by belt pulley 3-12 drive.
Further, for operating easily, and overall structure is simpler, two levels and interval are equipped on thread managing table 2
The second straight line sliding rail 3-14 of setting, and the lower surface of the main coiling table top 3-2 is slidably connected at two second straight line sliding rails
Between 3-14, two spaced third line slide rail 3-15 are equipped in the upper surface of main coiling table top 3-2, and described auxiliary
The lower surface of coiling table top 3-4 is slidably connected between two third line slide rail 3-15.
Further, in order to improve dust-proof effect, there is X-axis dust cover 3-16 in the output outer shaft sleeve of X-axis driving motor 3-3,
There is Y-axis dust cover 3-17 in the output outer shaft sleeve of Y-axis driving motor 3-1.
As shown in figure 11, further, for operating easily, and overall structure is simpler, the trimming component 7 includes
The fixed frame 7-1 of L-type is equipped with trimming cylinder 7-2 in the side of fixed frame 7-1, is equipped with and is fixed in the front end of trimming cylinder 7-2
On fixed frame 7-1 and to the 4th line slide rail 7-4 of index plate 5-4 inclined upward, slided in the top of the 4th line slide rail 7-4
The output shaft for being connected with scissors bit towards the cutting assemblies 7-5, the trimming cylinder 7-2 of index plate 5-4 connects with cutting assemblies 7-5
It connects.
As shown in figure 12, further, for operating easily, and overall structure is simpler, it is equipped in the top of thread managing table 2
Being respectively equipped on crimping bracket 2-1, the crimping bracket 2-1 can be to the pushing that the center corresponding index plate 5-4 is pushed
Positioning component 2-2, the pushing positioning component 2-2 include that can cooperate set on the lower surface crimping bracket 2-1 and with index plate 5-4
Crimping head 2-3 and crimping cylinder 2-4 set on the side crimping bracket 2-1, the output shaft of the crimping cylinder 2-4 be connected with
The cage plate 2-5 for being placed on crimping head 2-3 and crimping head 2-3 capable of being driven to move up and down.
Further, for the ease of fixation, the fixed frame 7-1 is fixed on crimping bracket 2-1 by connecting rod 2-6.
As shown in Figure 1, further, in order to improve dust-proof effect, being equipped with front and back in the top of rack 1 is the big dust-proof of opening
Cover 9.
As shown in Figure 1, further, the preceding platen 10 extended forward is additionally provided in rack 1 for operating easily,.
Further, in order to play guiding role, two be located behind relative to preceding 10 opposite of platen are additionally provided in rack 1
Group wire guide idler wheel mechanism 11, each group of wire guide idler wheel mechanism 11 cooperate with corresponding coiling nozzle 4 further, in order to
Dust-proof effect is improved, is equipped with the big dust cover that front and back is opening in the top of rack.
The equipment is made of tetra- groups of axis of X/Y/Z/U in above structure setting, provides signal by internal controller control,
Control movement realizes that movement all around each serves as the effect for looking for position of winding displacement, work origin using the driving of X/Y axis at this time,
Z axis drives coiling nozzle 4 to move up and down simultaneously, to the product coiling on index plate 5-4, and meanwhile it is positive and negative by U axis rotating electric machine 5-1
Then rotation moves up and down cooperate by Z axis driving motor 3-8 allows coiling nozzle 4 to move down on corresponding product winding slot 6
It is dynamic, it is ensured that cooperate with Z axis, while its specific rotation angle and product winding mode figure are related (slot number, across how many slot), specific angle
Then degree is programmed acquisition by product winding mode figure by those skilled in the art, this belongs to routine techniques, so not
It specifically describes, the specific working principle is as follows for above structure:
Power-on reset checks that line whether to original position, is manually placed at clamp cylinder 8-2 by each axis, and control clamp mouth 8-7's is big
Small to make it suitable for the effect of the clamps of different dimension lines, controller controls each coordinate and returns to origin (so-called origin can be at this time
It is arbitrarily selected on the display screen of the machine console, certainly according to product characteristic, select that the point of product coiling is suitble to be origin, people
Product is fixed on the upper of charging die and plays guiding role by wire guide idler wheel mechanism 11 by work feeding), then by setting
Standby start key, controller obtain X, the corresponding coordinate of Y-axis, and U axis cooperation left-right rotary turns linked to initial hook, provides coiling further according to client
Schematic diagram carries out carrying out winding to the product in product winding slot 6, is divided into the left positive winding of hook in control program upper hook mode,
The mode of right hook back-roll group;
Simultaneously in order to keep the end of a thread clamp shorter, trimming action is provided in this equipment, when the first slot winding of index plate 5-4 is completed
Afterwards, can be by starting automatic shearing function, the trimming cylinder 7-2 work of controller control at this time is stretched out, then trimming cylinder 7-2
Driving cutting assemblies 7-5 is slided on the 4th line slide rail 7-4, when arrival needs trimming position, by cutting assemblies 7-5
Scissors cylinder closure control arrow cutter head to product carry out automatic shearing operation, cut winding excessive thread ends, it is ensured that
The end of a thread cannot welding operation that is too long and influencing subsequent work stations resistance.
The effect for pushing positioning component is to start when needing to product trimming and push positioning component, under crimping cylinder 2-4
Pressure, cage plate 2-5 stretch out the limit stator inner ring iron core for driving crimping head 2-3 toward the center index plate 5-4 and push, under trimming component around
When group completes slot indexing straddle mounting, trimming cylinder 7-2 stretches out, when system in place of stretching out determines signal in place, on trimming cylinder 7-2
After magnetic switch can be installed in place, the scissors cylinder in cutting assemblies 7-5 is closed, and starts trimming, considers line footpath herein
The problem of thickness, controller can open scissors multiple with closure setting;
When work, the correspondence driving motor on X/Y/Z axis is moved according to the structure of product to each different directions, X-axis negative direction
(to the left) mobile, Y-axis positive direction (forward) is mobile, and (downward) movement of Z axis negative direction starts to link up with, and passes through driving folder before coiling
Line cylinder 8-2 drives the mobile spacing that the second clamp head 8-4 is adjusted to this of L-type clamp head 8-6, final adjustment clamp mouth 8-
7 size realizes the different size adjustings according to the end of a thread to step up the end of a thread, prevents the end of a thread from going after complete line to add inside line packet
Stringing, and give one positioning of scissors when can smoothly trimming act on, U axis rotating electric machine 5-1 is associated with Z axis driving motor 3-8, root
Different according to product winding, U axis rotates angle difference, and product winding slot 6 is rotated to an angle (also by Z axis driving motor 3-8
It is notch center alignment z axis mouth central axis, coiling nozzle is made smoothly to move up and down in product notch, when Z axis driving motor 3-8 drives
When line on dynamic coiling nozzle 4 moves up and down and moves to product plane or less, U axis rotating electric machine 5-1 rotates an angle at this time,
Guarantee that notch center is directed at z axis mouth central axis, is realized with this and cooperate lower completion coiling with U axis rotating electric machine 5-1, and Z axis drives
Dynamic motor 3-8 is only responsible for the not responsible front and back wire arrangement function that moves up and down, and front and back winding displacement is by X-axis driving electricity corresponding in Y-axis
Machine realizes mobile completion winding displacement all around.
The concrete operating principle of this product: product is individually positioned on die spacer block by artificial loading (ensures positioning side
To consistency, product inside groove male and female face and positioning tool male and female face match), both hands are by starting switch, and lifting cylinder retracts, crimping
Cylinder 2-4 is pushed, and in the limit stator that the center index plate 5-4 is compressed using crimping head 2-3, then X/Y/Z/U axis is according in advance
The movement band coiling nozzle editted is moved, and hang initial hook, hook with coiling be preset according to product characteristic (around
Line mode is to realize to be edited, using more thick line diameters, around how many circles, how multiple product winding slots 6 on index plate 5-4
Carrying out coiling by setting sequence is all that client is specified, what device manufacturer must not arbitrarily change), and how the volume of specific spooling step
Journey is all that completion is controlled by motion controller, and after the first trough end of coiling, clamp cylinder stretches out, and U axis rotates clockwise
32 °, trimming positioning cylinder stretches out, trimming cylinders retract, and by the extra cutting of hook line, (trimming cylinder is single to each cylinder after broken string
Control position), it is opened after scissors retracts delay 2 seconds, trimming positioning cylinder retracts, and U axis, which is taken advantage of a situation, rotates 150 °, between all process steps all
Equipped with certain delay, the speed that is delayed is determined according to speed, further according to the programming in logic figure winding of preprogramming, each slot of product
Winding turns be just as, after hanging hook around last complete slot, clamp cylinder 8-2 stretches out, and X-axis negative direction is mobile, coiling
Mouth drives buttock line to be moved at clamp block, and clamp cylinder 8-2, which is retracted, clamps buttock line, and U axis rotates clockwise 32 ° of trimming positioning cylinders
Buttock line is cut in stretching, trimming cylinders retract is delayed opens, at this moment buttock line is cut, and trimming cylinder 7-2 is retracted, crimping cylinder
2-4 is retracted, and lifting cylinder stretches out, and U axis, which rotates clockwise, looks for origin, and U axis stops after finding origin, realizes that a product winding is complete
At each product circuits sequentially operation later.The programming of coiling trend is those skilled in the art in the present embodiment
The routine techniques of member, so not specifically describing.
Therefore coiling can be carried out to various sizes of wire rod by being realized by above structure setting, and can also be realized automatic
The effect of trimming and crimping can finally overcome existing Wrapping machine to be suitble to small line footpath, winding displacement irregular and automatic coupling tongs line
Deficiency, the present invention, which can satisfy coil winding machine line footpath 1.0mm or more, can guarantee that winding displacement is neat, and have automatic coupling band tongs
Line function, for product, final coil configuration can neatly make volume-diminished, can also reduce winding process and slander asking for line
Topic.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.