A kind of have the timber blanking machine drawing tailing function
Technical field
This utility model belongs to woodworking machinery technical field, relates to a kind of timber blanking machine having and drawing tailing function.
Background technology
In timber is processed, timber must carry out cutting before as Raw material processing makes its specification and workpiece to be formed
Size matches, and timber is cut by this with regard to inevitably to use sawing machine.In prior art, the cutting to sheet material is big
Craft clamping, the hand cut of using more, this mode not only clamping inconvenience, and cut and also waste time and energy, working (machining) efficiency is low
Under, in order to solve this problem, people devise automatic blanking machine.Authorization Notice No. is the Chinese patent literary composition of CN203599632
Offer and disclose a kind of automatic blanking sawing machine, including frame and the cutting mechanism being arranged in frame, frame is additionally provided with plate folder
Tight mechanism, driving plate and feed mechanism, frame is additionally provided with the stock stop for being corrected plate position, in frame
Being additionally provided with feeding pressure mechanism, feeding pressure mechanism includes top binder cylinder and sidepiece binder cylinder, the top binder being arranged in frame
The piston of cylinder and sidepiece binder cylinder is provided with top binder block and the sidepiece binder block that can be pressed in slab top and sidepiece.
But above-mentioned blanking sawing machine there is also some defects, when batten is just met for cutting into multistage when, batten
Final stage often length is more slightly longer than the target batten segment length after cutting, and this surplus is not enough on above-mentioned blanking sawing machine
Cutting, because the removable jig arm of above-mentioned sawing machine is positioned at the right side of saw blade, there is distance in removable jig arm between saw blade, this
Distance makes the surplus of the final stage of batten have to be larger than this distance plus clamping length sum in jig arm, therefore, on
The blanking sawing machine stated makes the surplus of the final stage that batten cuts the longest, causes meaningless waste serious, is processing your wood
The when of material, this loss is difficult to bear.
Summary of the invention
The problems referred to above that this utility model exists for existing technology, it is provided that a kind of have under the timber drawing tailing function
Material machine, technical problem to be solved in the utility model is: the utilization rate of final stage tailing when how to improve cutting batten.
The purpose of this utility model can be realized by following technical proposal:
A kind of have the timber blanking machine drawing tailing function, and described blanking machine includes a frame, and described frame has
The workbench of level, described frame is provided with and is placed on the electric saw of timber on described workbench for cutting, it is characterised in that institute
Stating and be further fixed on horizontal guide rail one in frame, described horizontal guide rail one slidably connects slide block one, described frame is provided with use
In the driving source one driving described slide block one to move along horizontal guide rail one, described slide block one is fixed with the folder for gripping timber
Pawl one, described frame is further fixed on horizontal guide rail two, described horizontal guide rail two slidably connects slide block two, in described frame
It is provided with the driving source two for driving described slide block two to move along horizontal guide rail two, described slide block two is fixed with for gripping wood
The jaw two of material, described jaw one and jaw two lay respectively at the both sides of described electric saw and can grip same timber.
Its principle is as follows: draw tailing function to refer to jaw two and final stage tailing is gripped and shifted.To timber
When carrying out cutting stock, driving source one drive slide block one drive jaw one to the side shifting away from electric saw, by the timber of far-end
Gripping and move to electric saw, then drive source two to drive slide block two to move along horizontal guide rail two, slide block two drives jaw two also
Gripping this timber, this timber is clamped by jaw one and jaw two and against on the table simultaneously, thus is formed more steady simultaneously
Fixed location, it is possible to increasing timber time electric saw is cut by other location and carry out auxiliary positioning, timber is cut off by electric saw, jaw
Two will cut off after timber continue to be fed forward, the remainder of timber carry at electric saw by jaw one, formation continuous print cut
Cut off material.This blanking machine is respectively provided with jaw one and jaw two due to the left and right sides of electric saw, and the right side of electric saw is exit side, when
The when that batten being just met for cutting into multistage, batten final stage tailing often length is than the target batten segment length after cutting
Slightly longer, when cutting final stage, the jaw two of exit side individually grip the tailing of timber, then the tailing moving this timber makes
Obtaining tailing and be just met for Cutting Length requirement, surplus slightly longer for final stage tailing is cut away by electric saw, after jaw two will cut
Timber section transfers out from exit side, thus avoids because minimum range between electric saw feed side jaw one and electric saw causes
The defect that timber final stage tailing surplus is long, saves the waste of timber, final stage timber tail when improving cutting batten
The utilization rate of material.
A kind of having in the timber blanking machine drawing tailing function above-mentioned, described jaw one includes supporting plate one, along vertically
The jig arm one of direction setting and horizontally disposed jig arm two, described supporting plate one is fixed on slide block one, described jig arm one
Being fixed on supporting plate one by horizontal air cylinder one and jig arm one and supporting plate one are oppositely arranged, described jig arm two is by vertical cylinder one
It is fixed on supporting plate one and jig arm two is positioned at the top of workbench.Horizontal air cylinder one regulates jig arm one and the spacing of supporting plate one,
Can be clamped in by timber between jig arm one and supporting plate one, vertical cylinder one regulates the distance between jig arm two and workbench, can
To be compressed on the table by timber, this Bidirectional clamping horizontally and vertically can be preferably by timber gripping and location, just
In the accurate processing of timber, on the premise of particularly the timber final stage surplus of the application is smaller, this can raising adds
The Bidirectional clamping of work precision can reduce final stage timber cutting time error, prevent mismachining tolerance excessive cause final stage wood
Material curtailment, the utilization rate of final stage timber tailing when the most also improving cutting batten.
A kind of have in the timber blanking machine drawing tailing function above-mentioned, described supporting plate one is fixed with auxiliary slider
One, described jig arm one is fixed with one piece of auxiliary fixing plate one, described auxiliary fixing plate one bottom is fixed with auxiliary guide rail one, institute
The glide direction stating auxiliary guide rail one is identical with the telescopic direction of horizontal air cylinder one, described auxiliary guide rail one and auxiliary slider one or two
Person is slidably connected.Auxiliary slider one is motionless, and assists guide rail one slip, this oppositely arranged jig arm one is had preferably lead
To, clamp more accurate, it is simple to reduce mismachining tolerance, improve the utilization rate of timber tailing.
A kind of having in the timber blanking machine drawing tailing function above-mentioned, described jaw two includes supporting plate two and along vertically
The jig arm three that direction is arranged, described supporting plate two is fixed on slide block two, and described jig arm three is fixed on supporting plate by horizontal air cylinder two
On two and jig arm three and supporting plate two are oppositely arranged.The basic functional principle of jaw two is identical with jaw one, jig arm three and supporting plate two
Between define the clamping of horizontal direction, this structure of jaw two makes gripping and compresses the effect of timber final stage more
Good so that the machining accuracy of final stage is higher so that the surplus of the final stage of timber can be reduced to minimum, thus improves
The utilization rate of timber tailing.
A kind of have in the timber blanking machine drawing tailing function above-mentioned, described supporting plate two is fixed with auxiliary slider
Two, described jig arm three is fixed with one piece of auxiliary fixing plate two, described auxiliary fixing plate two bottom is fixed with auxiliary guide rail two, institute
The glide direction stating auxiliary guide rail two is identical with the telescopic direction of horizontal air cylinder two, described auxiliary guide rail two and auxiliary slider two liang
Person is slidably connected.Auxiliary guide rail two and the cooperation of auxiliary slider two, improve the precision that moves horizontally of jig arm three, clamp more smart
Really, it is simple to reduce mismachining tolerance, the tailing utilization rate of timber is improved.
A kind of having in the timber blanking machine drawing tailing function above-mentioned, described frame is provided with the level in strip
Fixing beam, described fixing beam and frame fix, and described horizontal guide rail one is fixed on described fixing beam and both are parallel, described
2-5 times of the length of a length of horizontal guide rail two of horizontal guide rail one.Fixing beam action is that more preferable regular length is long
Horizontal guide rail one, owing to jaw one is positioned at the feed side of electric saw, in addition it is also necessary to play the effect of feeding, need timber from far-end
Grip and be transferred to electric saw, so the length of horizontal guide rail one horizontal guide rail to be considerably longer than two, so long horizontal guide rail one
Need the fixing guarantee precision of preferably auxiliary, clamp more accurate, it is simple to reduce mismachining tolerance, improve the tailing profit of timber
By rate.
A kind of having in the timber blanking machine drawing tailing function above-mentioned, described driving source one and driving source two all include
Driving motor, Timing Belt and some belt wheels, described belt wheel is fixed in frame, and Timing Belt is connected on belt wheel, described Timing Belt
Conveying direction identical with the glide direction of horizontal guide rail one and horizontal guide rail two, described driving motor output shaft and corresponding with
The belt wheel of step band is connected, and described slide block one and slide block two fix with corresponding Timing Belt respectively.Drive driven by motor belt wheel
Rotating, belt wheel drives Timing Belt to move, and a Timing Belt band movable slider one moves, and another Timing Belt band movable slider two moves,
Use and drive the type of drive of motor and Timing Belt can improve precision, and can improve on the premise of ensureing precision and driven
The translational speed of part;Alternatively, driving source one and driving source two can also be the combinations of hydraulic motor and driving member.
A kind of having in the timber blanking machine drawing tailing function above-mentioned, described workbench includes horizontal plate one and level
Plate two, described horizontal plate one and horizontal plate two be each attached in frame, and described electric saw is positioned at the surface of horizontal plate one, described water
Flat board two is paralleled in strip and with horizontal guide rail one, and this horizontal plate two is positioned at the side of horizontal guide rail, described horizontal plate two
Edge and the side edge of horizontal plate one and both upper surface flush, described jaw one is positioned at just going up of horizontal plate two
Side, described jaw one is positioned at the surface of horizontal plate one.Horizontal plate one and horizontal plate two all support timber, when timber length compares
Time long, the horizontal plate two of strip cut portion non-to timber can carry out good support, prevents timber flexural deformation, improves
The precision of processing, also improves the utilization rate of timber, and the effect of the side edge of horizontal plate one and horizontal plate two is to enable timber
Smooth moves between.
A kind of having in the timber blanking machine drawing tailing function above-mentioned, described electric saw includes the saw arranged along vertical plane
Sheet, the angle of the cutting planes of described saw blade and the glide direction of horizontal guide rail one is 90 ° or 45 °, and described electric saw is positioned at work
The lower section of station and being vertically slidably connected in frame, described frame is provided with the driving source for driving electric saw to move
Three, described workbench offers the bar-shaped trough running through this workbench, described saw blade drive source three driving under can under
Through described bar-shaped trough on and.The saw blade of 90 ° of angles can cut 90 ° of angle blankings, and the saw blade of 45 ° of angles can cut 45° angle
Timber blanking, driving source three can be the combination of motor and screw mandrel, it is also possible to be the combination of hydraulic motor and screw mandrel, it is also possible to
It it is cylinder;Bar-shaped trough is easy to the saw blade of electric saw and is passed, and this structure can hide saw blade at ordinary times, improves safety.
A kind of have in the timber blanking machine drawing tailing function above-mentioned, described workbench is further fixed on vertically
Frame, described vertical rack is fixed with lower air cylinder, and the piston rod of described lower air cylinder is fixed with lower lock block, on described workbench
Being further fixed on some horizontally disposed compression cylinders, the piston rod of described compression cylinder is fixed with levelling block, described workbench
On be further fixed on horizontally disposed block.Vertical rack makes lower lock block may be located at the top of workbench, and lower air cylinder drives
Under lower lock block, against is on timber so that the location between timber and workbench is more stable, and levelling block is in compression cylinder
Also timber is pressed between itself and block under effect, improves the positioning stablity degree of timber.
Compared with prior art, advantage of the present utility model is as follows:
1, this blanking machine is respectively provided with jaw one and jaw two due to the left and right sides of electric saw, when batten is just met for cutting
The when of becoming multistage, batten final stage often length is more slightly longer than the target batten segment length after cutting, when cutting final stage
During tailing, the jaw two of exit side individually grip the final stage tailing of timber, then move the final stage tailing of this timber
Make timber be just met for Cutting Length requirement, thus avoid because of the minimum range between electric saw feed side jaw one and electric saw
The defect that the timber final stage tailing surplus that causes is long, saves the waste of timber tailing, improves during cutting batten last
The utilization rate of one section of timber tailing.
2, timber can preferably be gripped and location by this Bidirectional clamping horizontally and vertically of the jaw one of this blanking machine,
Be easy to the accurate processing of timber, on the premise of particularly the timber final stage tailing surplus of the application is smaller, this can
The Bidirectional clamping improving machining accuracy can reduce final stage tailing cutting time error, prevent mismachining tolerance excessive cause last
One section of timber curtailment, the utilization rate of final stage timber tailing when the most also improving cutting batten.
3, the auxiliary the guide rail two and cooperation of auxiliary slider two of this blanking machine, improve jig arm three moves horizontally precision,
Clamp more accurate, it is simple to reduce mismachining tolerance, improve the utilization rate of timber.
Accompanying drawing explanation
Fig. 1 is the overall structure axonometric chart at one of them visual angle of this blanking machine.
Fig. 2 is another visual angle overall structure axonometric chart of this blanking machine.
Fig. 3 is the partial structurtes schematic diagram in Fig. 1.
Fig. 4 is the partial structurtes schematic diagram in Fig. 2.
Fig. 5 is the Facad structure schematic diagram of jaw one.
Fig. 6 is the inverse layer structure schematic diagram of jaw one.
Fig. 7 is jaw two and driving source second-class partial structurtes schematic diagram.
Fig. 8 is the structural representation of jaw two.
In figure, 1 frame;2 workbench;3 electric saws;4 horizontal guide rails one;5 slide blocks one;6 jaws one;7 drive source one;8 levels
Guide rail two;9 slide blocks two;10 drive source two;11 jaws two;12 supporting plates one;13 jig arm one;14 jig arm two;15 horizontal air cylinders one;16
Vertically cylinder one;17 auxiliary sliders one;18 auxiliary fixing plates one;19 auxiliary guide rails one;20 supporting plates two;21 jig arm three;22 levels
Briquetting;23 horizontal air cylinders two;24 blocks;25 auxiliary sliders two;26 auxiliary fixing plates two;27 auxiliary guide rails two;28 fix beam;29
Drive motor;30 Timing Belts;31 belt wheels;32 horizontal plates one;33 horizontal plates two;34 saw blades;35 bar-shaped troughs;36 vertical racks;37
Lower air cylinder;38 lower lock blocks;39 compression cylinders.
Detailed description of the invention
The following is specific embodiment of the utility model and combine accompanying drawing, the technical solution of the utility model is made further
Description, but this utility model is not limited to these embodiments.
As depicted in figs. 1 and 2, originally have and draw the timber blanking machine of tailing function to include a frame 1, frame 1 has
The workbench 2 of level, frame 1 is provided with the electric saw 3 being placed on timber on workbench 2 for cutting, frame 1 is further fixed on water
Level gauge 1, frame 1 is provided with the fixing beam 28 of the level in strip, and fixing beam 28 and frame 1 are fixed, horizontal guide rail 1
It is fixed on fixing beam 28 and both are parallel, 2-5 times of the length of a length of horizontal guide rail 28 of horizontal guide rail 1.Level is led
Slidably connecting slide block 1 on rail 1, frame 1 is provided with the driving source for driving slide block 1 to move along horizontal guide rail 1
One 7, slide block 1 is fixed with the jaw 1 for gripping timber, frame 1 is further fixed on horizontal guide rail 28, fixing beam 28
Effect be the long horizontal guide rail 1 of more preferable regular length, owing to jaw 1 is positioned at the feed side of electric saw 3, in addition it is also necessary to
Play the effect of feeding, need grip by timber from far-end and be transferred to electric saw 3, so the length of horizontal guide rail 1 wants obvious
Being longer than horizontal guide rail 28, so long horizontal guide rail 1 needs the fixing guarantee precision of preferably auxiliary, clamps more smart
Really, it is simple to reduce mismachining tolerance, the utilization rate of timber is improved.Slidably connect slide block 29 on horizontal guide rail 28, frame 1 sets
There is the driving source 2 10 for driving slide block 29 to move along horizontal guide rail 28, slide block 29 is fixed with for gripping timber
Jaw 2 11, jaw 1 and jaw 2 11 lay respectively at the both sides of electric saw 3 and can grip same timber.
As shown in Figure 1, Figure 2 and Figure 3, if driving source 1 and driving source 2 10 all include drive motor 29, Timing Belt 30 and
Dry belt wheel 31, belt wheel 31 is fixed in frame 1, and Timing Belt 30 is connected on belt wheel 31, the conveying direction of Timing Belt 30 and level
The glide direction of guide rail 1 and horizontal guide rail 28 is identical, drives motor 29 output shaft and belt wheel 31 phase of corresponding Timing Belt 30
Connecting, slide block 1 and slide block 29 fix with corresponding Timing Belt 30 respectively.Motor 29 band movable belt pulley 31 is driven to rotate, belt wheel
31 drive Timing Belt 30 to move, and a Timing Belt 30 band movable slider 1 moves, and another Timing Belt 30 band movable slider 29 moves,
Use and drive the type of drive of motor 29 and Timing Belt 30 can improve precision, and quilt can be improved on the premise of ensureing precision
The translational speed of actuator;Alternatively, driving source 1 and driving source 2 10 can also be hydraulic motor and driving member
Combination.
As shown in Fig. 4 to Fig. 8, workbench 2 includes horizontal plate 1 and horizontal plate 2 33, horizontal plate 1 and horizontal plate two
33 are each attached in frame 1, and electric saw 3 is positioned at the surface of horizontal plate 1, and horizontal plate 2 33 is in strip and and horizontal guide rail
One 4 is parallel, and this horizontal plate 2 33 is positioned at the side of horizontal guide rail, the edge of horizontal plate 2 33 and the edge phase of horizontal plate 1
Connecing and both upper surface flush, jaw 1 is positioned at the surface of horizontal plate 2 33, and jaw 1 is positioned at horizontal plate 1
Surface.Horizontal plate 1 and horizontal plate 2 33 all support timber, when timber length is long, and the horizontal plate 2 33 of strip
Cut portion non-to timber can carry out good support, prevent timber flexural deformation, improve the precision of processing, also improve timber
Utilization rate, the effect of the side edge of horizontal plate 1 and horizontal plate 2 33 is the shifting between enabling timber to smooth
Dynamic.Electric saw 3 includes the saw blade 34 arranged along vertical plane, the cutting planes of saw blade 34 and the folder of the glide direction of horizontal guide rail 1
Angle is 90 ° or 45 °, and electric saw 3 is positioned at the lower section of workbench 2 and is vertically slidably connected in frame 1, and frame 1 sets
Having the driving source three for driving electric saw 3 to move, workbench 2 offers the bar-shaped trough 35 running through this workbench 2, saw blade 34 exists
Bar-shaped trough 35 can be passed from bottom to top under the driving in driving source three.The saw blade 34 of 90 ° of angles can cut 90 ° of angle blankings, 45 °
The saw blade 34 of angle can cut the timber blanking of 45° angle, and driving source three can be the combination of motor and screw mandrel, it is also possible to be liquid
Pressure motor and the combination of screw mandrel, it is also possible to be cylinder;Bar-shaped trough 35 is easy to the saw blade 34 of electric saw 3 and is passed, and this structure at ordinary times may be used
With hiding saw blade 34, improve safety.
As shown in Figure 5 to Figure 6, jaw 1 include supporting plate 1, the jig arm 1 that vertically arranges and along level side
To the jig arm 2 14 arranged, supporting plate 1 is fixed on slide block 1, and jig arm 1 is fixed on supporting plate one by horizontal air cylinder 1
On 12 and jig arm 1 and supporting plate 1 are oppositely arranged, jig arm 2 14 is fixed on supporting plate 1 by vertical cylinder 1 and is pressed from both sides
Arm 2 14 is positioned at the top of workbench 2.Horizontal air cylinder 1 regulation jig arm 1 and the spacing of supporting plate 1, on supporting plate 1
Being fixed with auxiliary slider 1, jig arm 1 is fixed with one piece of auxiliary fixing plate 1, auxiliary fixing plate 1 bottom is fixed
Having auxiliary guide rail 1, the glide direction of auxiliary guide rail 1 is identical with the telescopic direction of horizontal air cylinder 1, assists guide rail one
19 and auxiliary slider 1 both be slidably connected.Auxiliary slider 1 is motionless, and assists guide rail 1 to slide, this oppositely arranged
Make jig arm 1 have preferably guiding, clamp more accurate, it is simple to reduce mismachining tolerance, improve the utilization rate of timber.Can
Timber is clamped between jig arm 1 and supporting plate 1, between vertical cylinder 1 regulation jig arm 2 14 and workbench 2
Distance, can be pressed on timber on workbench 2, this Bidirectional clamping horizontally and vertically can preferably by timber gripping and
Location, it is simple to the accurate processing of timber, on the premise of particularly the timber final stage surplus of the application is smaller, this can
The Bidirectional clamping improving machining accuracy can reduce final stage timber cutting time error, prevent mismachining tolerance excessive cause last
One section of timber curtailment, the utilization rate of final stage timber when the most also improving cutting batten.
As shown in Figure 6 to 8, jaw 2 11 includes supporting plate 2 20 and the jig arm 3 21 vertically arranged, supporting plate two
20 are fixed on slide block 29, and jig arm 3 21 is fixed on supporting plate 2 20 by horizontal air cylinder 2 23 and jig arm 3 21 and supporting plate two
20 are oppositely arranged.It is fixed with auxiliary slider 2 25 on supporting plate 2 20, jig arm 3 21 is fixed with one piece of auxiliary fixing plate 2 26, auxiliary
Fixed plate 2 26 bottom is helped to be fixed with auxiliary guide rail 2 27, the glide direction of auxiliary guide rail 2 27 and stretching of horizontal air cylinder 2 23
Direction is identical, and both auxiliary guide rail 2 27 and auxiliary slider 2 25 are slidably connected.Auxiliary guide rail 2 27 and auxiliary slider 2 25
Coordinate, improve the precision that moves horizontally of jig arm 3 21, clamp more accurate, it is simple to reduce mismachining tolerance, improve the profit of timber
Identical with jaw 1 by the basic functional principle of rate jaw 2 11, define horizontal direction between jig arm 3 21 and supporting plate 2 20
Clamping, this structure of jaw 2 11 make gripping and compress timber final stage effect more preferable so that final stage
Machining accuracy is higher so that the surplus of the final stage of timber can be reduced to minimum, thus improves the utilization rate of timber.
As shown in Figures 1 to 8, workbench 2 is further fixed on vertical rack 36, vertical rack 36 is fixed with lower air cylinder
37, the piston rod of lower air cylinder 37 is fixed with lower lock block 38, and workbench 2 is further fixed on some horizontally disposed compression cylinders
39, the piston rod of compression cylinder 39 is fixed with levelling block 22, and workbench 2 is further fixed on horizontally disposed block 24.Vertically
Support 36 makes lower lock block 38 may be located at the top of workbench 2, and lower air cylinder 37 drives 38 times against of lower lock block at timber
On so that the location between timber and workbench 2 is more stable, levelling block 22 under the effect of compression cylinder 39 also by timber pressure
Tight between itself and block 24, improve the positioning stablity degree of timber.When timber is carried out cutting stock, source 1 is driven to drive
Slide block 1 drives jaw 1 to the side shifting away from electric saw 3, is gripped and move to electric saw 3 by the timber of far-end, then
Driving source 2 10 drives slide block 29 to move along horizontal guide rail 28, and slide block 29 drives jaw 2 11 to grip this timber the most simultaneously, should
Timber is clamped and is resisted against by jaw 1 and jaw 2 11 on workbench 2 simultaneously, thus forms more stable location, it is possible to
Increasing timber time electric saw 3 is cut by other location and carry out auxiliary positioning, timber is cut off by electric saw 3, and jaw 2 11 will cut off
After timber continue to be fed forward, the remainder of timber is carried at electric saw 3 by jaw 1, formed continuous print cutting stock.
This blanking machine is respectively provided with jaw 1 and jaw 2 11 due to the left and right sides of electric saw 3, and the right side of electric saw 3 is exit side, works as wood
The when that bar being just met for cutting into multistage, batten final stage often length is more slightly longer than the target batten segment length after cutting,
When cutting final stage, the jaw 2 11 of exit side individually grip the final stage of timber, then move the last of this timber
One section makes timber be just met for Cutting Length requirement, and surplus slightly longer for final stage timber is cut away by electric saw 3, and jaw 2 11 will
Timber section after cutting transfers out from exit side, thus avoid because of between electric saw 3 feed side jaw 1 and electric saw 3
The defect that timber final stage surplus that small distance causes is long, saves the waste of timber, when improving cutting batten last
The utilization rate of section timber.
Specific embodiment described herein is only to this utility model spirit explanation for example.This utility model institute
Belong to those skilled in the art described specific embodiment to make various amendment or supplement or use similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.