A kind of steel-bar bender
Technical field
The present invention relates to a kind of bending machine more particularly to a kind of steel-bar benders.
Background technique
In finishing or construction, people are frequently necessary to the hard article such as reinforcing bar being bent into different shapes, with suitable
Different needs are answered, but the present universal volume of bending reinforcement equipment is larger, it is mobile inconvenient, it is unfavorable for carrying, in bending process
In, the position of reinforcing bar is not fixed, and positional shift is easy to happen, and easily causes bending position not accurate, in turn results in the steel of bending
Muscle cannot use, to cause waste of material.
Summary of the invention
In order to overcome the shortcomings that present bending reinforcement equipment volume is big, movement is inconvenient and bending position easily deviates, technology
Problem are as follows: the steel-bar bender that the small in size, conveniently moving of one kind is provided and bending position can be fixed.
Technical solution: a kind of steel-bar bender includes bending casing, triangular fixing frame, oscillating deck, arc slide bar, side
Shape framework, turntable, first swing kelly, the first torque spring, oscillating rod, handle, reel, triangular support bracket, fixed block, the
Two swing kelly, the second torque spring and drawstring, and bending casing is equipped with triangular fixing frame, bending sleeve bottom right end rotary type
Equipped with oscillating deck, right end is fixedly connected with arc slide bar on front side of oscillating deck, and arc slide bar bottom is uniformly provided with card slot, bending casing
Upper end is equipped with square frame, and middle part rotary type is equipped with turntable in square frame, is uniformly provided with three the first grooves on the right side of turntable, the
Bottom right rotary type is equipped with first and swings kelly in one groove, and the first swing kelly top of top is caught in card slot, and first
Bottom left is connected with the first torque spring in groove, and the right end of the first torque spring is connect with the first swing kelly, before turntable
Middle side part is equipped with oscillating rod, and oscillating rod is located in front of square frame, and oscillating rod upper end is equipped with handle, and oscillating rod lower front is equipped with
Reel, is wound with drawstring on reel, and at the top of square frame and left wall is provided with first through hole, and square frame front left is equipped with three
Angle support frame, gusseted top of the trellis are equipped with fixed block, and arc slide opening is provided in the middle part of fixed block, and arc slide bar left end passes through arc
Slide opening, fixed block lower part are provided with the second groove and the second through-hole, and the second groove is located on the upside of the second through-hole, and the second groove is located at arc
On the downside of shape slide opening, bottom right rotary type is equipped with second and swings kelly in the second groove, and the second swing kelly top is caught in card slot
Interior, bottom left is equipped with the second torque spring in the second groove, and the second torque spring right end and second swing kelly left lower
Connection, drawstring left end pass through the second through-hole and the second groove, and drawstring left end is connect with the second swing kelly upper end.
Further, further include having guide rod, pedal, third spring and pressing plate, be provided with third among bending casing inner top
Groove, the left and right sides is provided with pilot hole on bending casing, and pilot hole is connected to third groove, and guiding is placed in pilot hole
Bar, two side's guide rod tops of left and right are equipped with pedal, and pedal is located above pilot hole, and two side's guide rod bottom ends of left and right are equipped with pressing plate,
The left and right sides is respectively connected with third spring at the top of pressing plate, and third spring upper end is connect with third groove inner top, and guide rod passes through
Third spring.
It further, further include having cannulated sleeve, the 4th spring, support and idler wheel, bottom left is provided in bending casing
Four grooves, bottom is equipped with the 4th spring in the 4th groove, and the 4th spring top is equipped with cannulated sleeve, is equipped at the top of cannulated sleeve
Support, holder top rotary type are equipped with idler wheel.
It further, further include having screw rod, corner block and nut, on the left of bending casing and triangular fixing frame lower left side is provided with the
Three through-holes, screw rod is placed in third through-hole, and screw rod bottom end is equipped with corner block, corner block and bending casing left contact, screw rod
Upper end is equipped with nut, and nut right end is contacted with triangular fixing frame.
When people need reinforcing bar carrying out bending, reinforcing bar is first inserted into bending casing by people, after being inserted in place,
People press the handle on oscillating rod still further below, and oscillating rod drives turntable to rotate counterclockwise, and it is inverse that driven by rotary disc first swings kelly
Hour hands rotation, and then arc slide bar is driven to rotate counterclockwise, so that oscillating deck be driven to be rotated up, reinforcing bar can so be carried out
Bending, oscillating rod, which rotates counterclockwise while will drive reel, puts drawstring, when arc slide bar rotates counterclockwise, arc slide bar meeting
Compressing second swings kelly, and then compresses the second torque spring, can slide into as the rotation second of arc slide bar swings kelly
In the card slot adjacent to right side, the second torque spring resets, and so as to prevent the oscillating rod in bending process from rebounding, improves
Safety, after people are by bending reinforcement, oscillating rod is lifted up by people again, and oscillating rod drives turntable to rotate clockwise, and is turned
Disk drives the first swing kelly to rotate clockwise, and the first torque spring is compressed, while the first swing kelly can slide into right side
In adjacent card slot, the first torque spring resets, while turntable will drive reel and reel rope, and drawstring pulls second to swing kelly
It moving down, the second torque spring is compressed, and then the first swing kelly and the second swing kelly no longer block arc slide bar,
Oscillating deck can rotate down under the effect of gravity and homing, and the second torque spring also resets simultaneously, works as oscillating deck
After reset, people can take out the reinforcing bar after bending out of bending casing, and small volume of the present invention facilitates people to move
It is dynamic, the physical strength of people can be saved.
After reinforcing bar is inserted into bending casing, for people when pressing oscillating rod, people slam pedal with foot, and pedal drive is led
It moves down to bar, and then is moved down with dynamic pressure plate, third spring is stretched, and pressing plate bottom presses reinforcing bar, and then by steel
The position of muscle is fixed, and so as to keep the position of bending reinforcement more accurate, after bending reinforcement, people move up foot from pedal
It opens, pressing plate moves up under the spring-force driven dual of third spring, third spring reset, and then pedal is made to move up and answer
Position, then people can take reinforcing bar away.
In order to facilitate the insertion of reinforcing bar, the present invention is provided with idler wheel, when people are inserted into reinforcing bar into bending casing, reinforcing bar
Idler wheel can be made to move down, idler wheel drives support to move down, and support drives cannulated sleeve to move down, and the 4th spring is pressed
Contracting, reinforcing bar is mobile on idler wheel can be more labor-saving, is more convenient the insertion of reinforcing bar, after bending reinforcement is taken away, cannulated sleeve is the 4th
It is moved up under the spring-force driven dual of spring, the 4th spring reset, and then support is driven to move up, to make idler wheel to moving up
It moves and resets.
In order to improve function of the invention, when people need shape that bending reinforcement is smaller at radian, people are by spiral shell
Bar is inserted into triangular fixing frame out of third through-hole, then in conjunction with screw rod and is screwed nut, corner block can directly connect
Reinforcing bar is touched, so that bending position is made to be bent into the smaller shape of radian, when people need that bending reinforcement camber is larger, people
Screw rod, corner block and nut are removed again, can the biggish shape of bending camber.
The invention has the benefit that the present invention is provided with pedal and pressing plate, and when people carry out bend reinforcement, Ren Menyong
Foot slams pedal, and pedal moves down, and then moves down with dynamic pressure plate, and pressing plate bottom presses reinforcing bar, and then by reinforcing bar
Position is fixed, and so as to keep the position of bending reinforcement more accurate, the configuration of the present invention is simple is small in size, and people is facilitated to move
Dynamic, to save the physical strength of people, practicability is stronger, is adapted to the needs of a variety of bending angles.
Detailed description of the invention
Fig. 1 is schematic view of the front view of the invention.
Fig. 2 is the enlarged structure schematic diagram of part A of the present invention.
Fig. 3 is the first part enlarged structure schematic diagram of the invention.
Fig. 4 is second of part enlarged structure schematic diagram of the invention.
Fig. 5 is the third part enlarged structure schematic diagram of the invention.
In the figures above: 1 bending casing, 2 triangular fixing frames, 3 oscillating decks, 4 arc slide bars, 5 card slots, 6 square frames, 7
Turntable, 8 first grooves, 9 first swing kelly, and 10 first torque springs, 11 oscillating rods, 12 handles, 13 reels, 14 first is logical
Hole, 15 triangular support brackets, 16 fixed blocks, 17 arc slide openings, 18 second grooves, 19 second swing kellies, 20 second torque springs,
21 second through-holes, 22 drawstrings, 23 third grooves, 24 pilot holes, 25 guide rods, 26 pedals, 27 third springs, 28 pressing plates, 29
Four grooves, 30 cannulated sleeves, 31 the 4th springs, 32 supports, 33 idler wheels, 34 third through-holes, 35 screw rods, 36 corner blocks, 37 nuts.
Specific embodiment
Embodiments of the present invention is described in detail with reference to the accompanying drawings.
Embodiment 1
A kind of steel-bar bender, as shown in Figs. 1-5, include bending casing 1, triangular fixing frame 2, oscillating deck 3, arc slide bar 4,
Square frame 6, turntable 7, first swing kelly 9, the first torque spring 10, oscillating rod 11, handle 12, reel 13, triangle branch
Support 15, fixed block 16, second swing kelly 19, the second torque spring 20 and drawstring 22, bending casing 1 and fix equipped with triangle
Frame 2,1 bottom right end rotary type of bending casing are equipped with oscillating deck 3, and 3 front side right end of oscillating deck is fixedly connected with arc slide bar 4, arc
4 bottom of shape slide bar is uniformly provided with card slot 5, and 1 upper end of bending casing is equipped with square frame 6, and middle part rotary type is equipped in square frame 6
Turntable 7 is uniformly provided with three the first grooves 8 on the right side of turntable 7, and bottom right rotary type is equipped with first and swings card in the first groove 8
First swing 9 top of kelly of bar 9, top is caught in card slot 5, and bottom left is connected with the first torque spring in the first groove 8
10, the right end of the first torque spring 10 is connect with the first swing kelly 9, and 7 front side middle part of turntable is equipped with oscillating rod 11, oscillating rod 11
Positioned at 6 front of square frame, 11 upper end of oscillating rod is equipped with handle 12, and 11 lower front of oscillating rod is equipped with reel 13, reel
Drawstring 22 is wound on 13,6 top of square frame and left wall are provided with first through hole 14, and 6 front left of square frame is equipped with triangle branch
Support 15 is equipped with fixed block 16 at the top of triangular support bracket 15, is provided with arc slide opening 17,4 left end of arc slide bar in the middle part of fixed block 16
Across arc slide opening 17,16 lower part of fixed block is provided with the second groove 18 and the second through-hole 21, and the second groove 18 is located at the second through-hole
21 upsides, the second groove 18 are located at 17 downside of arc slide opening, and bottom right rotary type is equipped with second and swings card in the second groove 18
Bar 19, the second swing 19 top of kelly are caught in card slot 5, and bottom left is equipped with the second torque spring 20 in the second groove 18, the
Two torque springs, 20 right end is connect with the second swing 19 left lower of kelly, and it is recessed that 22 left end of drawstring passes through the second through-hole 21 and second
Slot 18,22 left end of drawstring are connect with the second swing 19 upper end of kelly.
Embodiment 2
A kind of steel-bar bender, as shown in Figs. 1-5, include bending casing 1, triangular fixing frame 2, oscillating deck 3, arc slide bar 4,
Square frame 6, turntable 7, first swing kelly 9, the first torque spring 10, oscillating rod 11, handle 12, reel 13, triangle branch
Support 15, fixed block 16, second swing kelly 19, the second torque spring 20 and drawstring 22, bending casing 1 and fix equipped with triangle
Frame 2,1 bottom right end rotary type of bending casing are equipped with oscillating deck 3, and 3 front side right end of oscillating deck is fixedly connected with arc slide bar 4, arc
4 bottom of shape slide bar is uniformly provided with card slot 5, and 1 upper end of bending casing is equipped with square frame 6, and middle part rotary type is equipped in square frame 6
Turntable 7 is uniformly provided with three the first grooves 8 on the right side of turntable 7, and bottom right rotary type is equipped with first and swings card in the first groove 8
First swing 9 top of kelly of bar 9, top is caught in card slot 5, and bottom left is connected with the first torque spring in the first groove 8
10, the right end of the first torque spring 10 is connect with the first swing kelly 9, and 7 front side middle part of turntable is equipped with oscillating rod 11, oscillating rod 11
Positioned at 6 front of square frame, 11 upper end of oscillating rod is equipped with handle 12, and 11 lower front of oscillating rod is equipped with reel 13, reel
Drawstring 22 is wound on 13,6 top of square frame and left wall are provided with first through hole 14, and 6 front left of square frame is equipped with triangle branch
Support 15 is equipped with fixed block 16 at the top of triangular support bracket 15, is provided with arc slide opening 17,4 left end of arc slide bar in the middle part of fixed block 16
Across arc slide opening 17,16 lower part of fixed block is provided with the second groove 18 and the second through-hole 21, and the second groove 18 is located at the second through-hole
21 upsides, the second groove 18 are located at 17 downside of arc slide opening, and bottom right rotary type is equipped with second and swings card in the second groove 18
Bar 19, the second swing 19 top of kelly are caught in card slot 5, and bottom left is equipped with the second torque spring 20 in the second groove 18, the
Two torque springs, 20 right end is connect with the second swing 19 left lower of kelly, and it is recessed that 22 left end of drawstring passes through the second through-hole 21 and second
Slot 18,22 left end of drawstring are connect with the second swing 19 upper end of kelly.
Further include having guide rod 25, pedal 26, third spring 27 and pressing plate 28, is provided among 1 inner top of bending casing
Three grooves 23, the left and right sides is provided with pilot hole 24 on bending casing 1, and pilot hole 24 is connected to third groove 23, pilot hole 24
It is inside placed with guide rod 25, left and right two side's guide rods, 25 top is equipped with pedal 26, and pedal 26 is located at 24 top of pilot hole, left and right two
Square 25 bottom end of guide rod is equipped with pressing plate 28, and the 28 top left and right sides of pressing plate is respectively connected with third spring 27,27 upper end of third spring
It is connect with 23 inner top of third groove, guide rod 25 passes through third spring 27.
Embodiment 3
A kind of steel-bar bender, as shown in Figs. 1-5, include bending casing 1, triangular fixing frame 2, oscillating deck 3, arc slide bar 4,
Square frame 6, turntable 7, first swing kelly 9, the first torque spring 10, oscillating rod 11, handle 12, reel 13, triangle branch
Support 15, fixed block 16, second swing kelly 19, the second torque spring 20 and drawstring 22, bending casing 1 and fix equipped with triangle
Frame 2,1 bottom right end rotary type of bending casing are equipped with oscillating deck 3, and 3 front side right end of oscillating deck is fixedly connected with arc slide bar 4, arc
4 bottom of shape slide bar is uniformly provided with card slot 5, and 1 upper end of bending casing is equipped with square frame 6, and middle part rotary type is equipped in square frame 6
Turntable 7 is uniformly provided with three the first grooves 8 on the right side of turntable 7, and bottom right rotary type is equipped with first and swings card in the first groove 8
First swing 9 top of kelly of bar 9, top is caught in card slot 5, and bottom left is connected with the first torque spring in the first groove 8
10, the right end of the first torque spring 10 is connect with the first swing kelly 9, and 7 front side middle part of turntable is equipped with oscillating rod 11, oscillating rod 11
Positioned at 6 front of square frame, 11 upper end of oscillating rod is equipped with handle 12, and 11 lower front of oscillating rod is equipped with reel 13, reel
Drawstring 22 is wound on 13,6 top of square frame and left wall are provided with first through hole 14, and 6 front left of square frame is equipped with triangle branch
Support 15 is equipped with fixed block 16 at the top of triangular support bracket 15, is provided with arc slide opening 17,4 left end of arc slide bar in the middle part of fixed block 16
Across arc slide opening 17,16 lower part of fixed block is provided with the second groove 18 and the second through-hole 21, and the second groove 18 is located at the second through-hole
21 upsides, the second groove 18 are located at 17 downside of arc slide opening, and bottom right rotary type is equipped with second and swings card in the second groove 18
Bar 19, the second swing 19 top of kelly are caught in card slot 5, and bottom left is equipped with the second torque spring 20 in the second groove 18, the
Two torque springs, 20 right end is connect with the second swing 19 left lower of kelly, and it is recessed that 22 left end of drawstring passes through the second through-hole 21 and second
Slot 18,22 left end of drawstring are connect with the second swing 19 upper end of kelly.
Further include having guide rod 25, pedal 26, third spring 27 and pressing plate 28, is provided among 1 inner top of bending casing
Three grooves 23, the left and right sides is provided with pilot hole 24 on bending casing 1, and pilot hole 24 is connected to third groove 23, pilot hole 24
It is inside placed with guide rod 25, left and right two side's guide rods, 25 top is equipped with pedal 26, and pedal 26 is located at 24 top of pilot hole, left and right two
Square 25 bottom end of guide rod is equipped with pressing plate 28, and the 28 top left and right sides of pressing plate is respectively connected with third spring 27,27 upper end of third spring
It is connect with 23 inner top of third groove, guide rod 25 passes through third spring 27.
It further include having cannulated sleeve 30, the 4th spring 31, support 32 and idler wheel 33, bottom left is provided in bending casing 1
4th groove 29, bottom is equipped with the 4th spring 31 in the 4th groove 29, and 31 top of the 4th spring is equipped with cannulated sleeve 30, hollow sleeve
30 top of cylinder is equipped with support 32, and 32 top rotary type of support is equipped with idler wheel 33.
Embodiment 4
A kind of steel-bar bender, as shown in Figs. 1-5, include bending casing 1, triangular fixing frame 2, oscillating deck 3, arc slide bar 4,
Square frame 6, turntable 7, first swing kelly 9, the first torque spring 10, oscillating rod 11, handle 12, reel 13, triangle branch
Support 15, fixed block 16, second swing kelly 19, the second torque spring 20 and drawstring 22, bending casing 1 and fix equipped with triangle
Frame 2,1 bottom right end rotary type of bending casing are equipped with oscillating deck 3, and 3 front side right end of oscillating deck is fixedly connected with arc slide bar 4, arc
4 bottom of shape slide bar is uniformly provided with card slot 5, and 1 upper end of bending casing is equipped with square frame 6, and middle part rotary type is equipped in square frame 6
Turntable 7 is uniformly provided with three the first grooves 8 on the right side of turntable 7, and bottom right rotary type is equipped with first and swings card in the first groove 8
First swing 9 top of kelly of bar 9, top is caught in card slot 5, and bottom left is connected with the first torque spring in the first groove 8
10, the right end of the first torque spring 10 is connect with the first swing kelly 9, and 7 front side middle part of turntable is equipped with oscillating rod 11, oscillating rod 11
Positioned at 6 front of square frame, 11 upper end of oscillating rod is equipped with handle 12, and 11 lower front of oscillating rod is equipped with reel 13, reel
Drawstring 22 is wound on 13,6 top of square frame and left wall are provided with first through hole 14, and 6 front left of square frame is equipped with triangle branch
Support 15 is equipped with fixed block 16 at the top of triangular support bracket 15, is provided with arc slide opening 17,4 left end of arc slide bar in the middle part of fixed block 16
Across arc slide opening 17,16 lower part of fixed block is provided with the second groove 18 and the second through-hole 21, and the second groove 18 is located at the second through-hole
21 upsides, the second groove 18 are located at 17 downside of arc slide opening, and bottom right rotary type is equipped with second and swings card in the second groove 18
Bar 19, the second swing 19 top of kelly are caught in card slot 5, and bottom left is equipped with the second torque spring 20 in the second groove 18, the
Two torque springs, 20 right end is connect with the second swing 19 left lower of kelly, and it is recessed that 22 left end of drawstring passes through the second through-hole 21 and second
Slot 18,22 left end of drawstring are connect with the second swing 19 upper end of kelly.
Further include having guide rod 25, pedal 26, third spring 27 and pressing plate 28, is provided among 1 inner top of bending casing
Three grooves 23, the left and right sides is provided with pilot hole 24 on bending casing 1, and pilot hole 24 is connected to third groove 23, pilot hole 24
It is inside placed with guide rod 25, left and right two side's guide rods, 25 top is equipped with pedal 26, and pedal 26 is located at 24 top of pilot hole, left and right two
Square 25 bottom end of guide rod is equipped with pressing plate 28, and the 28 top left and right sides of pressing plate is respectively connected with third spring 27,27 upper end of third spring
It is connect with 23 inner top of third groove, guide rod 25 passes through third spring 27.
It further include having cannulated sleeve 30, the 4th spring 31, support 32 and idler wheel 33, bottom left is provided in bending casing 1
4th groove 29, bottom is equipped with the 4th spring 31 in the 4th groove 29, and 31 top of the 4th spring is equipped with cannulated sleeve 30, hollow sleeve
30 top of cylinder is equipped with support 32, and 32 top rotary type of support is equipped with idler wheel 33.
It further include having screw rod 35, corner block 36 and nut 37,1 left side of bending casing and 2 lower left side of triangular fixing frame are provided with
Third through-hole 34, screw rod 35 is placed in third through-hole 34, and 35 bottom end of screw rod is equipped with corner block 36, corner block 36 and bending casing
1 left contact, 35 upper end of screw rod are equipped with nut 37, and 37 right end of nut is contacted with triangular fixing frame 2.
When people need reinforcing bar carrying out bending, reinforcing bar is first inserted into bending casing 1 by people, when being inserted in place
Afterwards, people press the handle 12 on oscillating rod 11 still further below, and oscillating rod 11 drives turntable 7 to rotate counterclockwise, and turntable 7 drives first
It swings kelly 9 to rotate counterclockwise, and then arc slide bar 4 is driven to rotate counterclockwise, to drive oscillating deck 3 to be rotated up, so
Reinforcing bar can be bent, oscillating rod 11, which rotates counterclockwise while will drive reel 13, puts drawstring 22, inverse in arc slide bar 4
When hour hands rotate, arc slide bar 4 can oppress the second swing kelly 19, and then compress the second torque spring 20, as arc is sliding
The rotation second of bar 4 swings kelly 19 and can slide into the adjacent card slot 5 in right side, and the second torque spring 20 resets, so as to
It prevents the oscillating rod 11 in bending process from rebounding, improves safety, after people are by bending reinforcement, people are again by oscillating rod 11
It is lifted up, oscillating rod 11 drives turntable 7 to rotate clockwise, and turntable 7 drives the first swing kelly 9 to rotate clockwise, and first turns round
Power spring 10 is compressed, while the first swing kelly 9 can slide into the adjacent card slot 5 in right side, and the first torque spring 10 resets,
Turntable 7 will drive reel 13 and reel rope 22 simultaneously, and drawstring 22 pulls the second swing kelly 19 to move down, the second torque spring
20 are compressed, and then the first swing kelly 9 and the second swing kelly 19 no longer block arc slide bar 4, and oscillating deck 3 is in itself weight
Simultaneously homing can be rotated down under the action of power, the second torque spring 20 also resets simultaneously, after oscillating deck 3 resets, people
Reinforcing bar after bending can be taken out out of bending casing 1, small volume of the present invention facilitates people to move, and can save
The physical strength of people.
After reinforcing bar is inserted into bending casing 1, for people when pressing oscillating rod 11, people slam pedal 26, pedal with foot
26 drive guide rods 25 move down, and then move down with dynamic pressure plate 28, and third spring 27 is stretched, the pressing of 28 bottom of pressing plate
Firmly reinforcing bar, and then the position of reinforcing bar is fixed, so as to keep the position of bending reinforcement more accurate, after bending reinforcement, people
Foot to be removed from pedal 26, pressing plate 28 moves up under the spring-force driven dual of third spring 27, and third spring 27 resets, into
And move up pedal 26 and reset, then people can take reinforcing bar away.
In order to facilitate the insertion of reinforcing bar, the present invention is provided with idler wheel 33, when people are inserted into reinforcing bar into bending casing 1,
Reinforcing bar can be such that idler wheel 33 moves down, and idler wheel 33 drives support 32 to move down, and support 32 drives cannulated sleeve 30 to move down,
4th spring 31 is compressed, and reinforcing bar is mobile on idler wheel 33 can be more labor-saving, the insertion of reinforcing bar is more convenient, when bending reinforcement is taken away
Afterwards, cannulated sleeve 30 moves up under the spring-force driven dual of the 4th spring 31, and the 4th spring 31 resets, and then drives support 32
It moves up, to make idler wheel 33 move up and reset.
In order to improve function of the invention, when people need shape that bending reinforcement is smaller at radian, people are by spiral shell
Bar 35 is inserted into triangular fixing frame 2 out of third through-hole 34, and then nut 37 is combined and screwed with screw rod 35, corner block 36
Reinforcing bar can be directly contacted, to make bending position be bent into the smaller shape of radian, when people need bending reinforcement into arc
When shape is larger, people again remove screw rod 35, corner block 36 and nut 37, can the biggish shape of bending camber.
Although describing the present invention referring to exemplary embodiment, it should be understood that the present invention is not limited to disclosed to show
Example property embodiment.The scope of the following claims should give broadest explanation, to cover all modification and equivalent
Structure and function.