CN206509351U

CN206509351U - Blank descaling device

Info

Publication number: CN206509351U
Application number: CN201621101650.6U
Authority: CN
Inventors: 朴吉美
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-04
Filing date: 2016-09-30
Publication date: 2017-09-22
Anticipated expiration: 2026-09-30
Also published as: EP3165296A1; EP3165296B1; KR101654645B1

Abstract

The utility model is related to blank descaling device, and it removes the scale formed on the surface of circular blank, including two roller units, and it is set to separate each other, extends before and after being formed as each, and be configured to rotatably support circular blank；Two or more cutter units, its length direction along two roller units is set, and is configured to be evenly dividing the surface for the blank being placed between two roller units along the length direction of blank and at the same time perform to cut work；And propulsion unit, it is configured to the blank for being moved rearwards by being handled by each cutter unit.

Description

Blank descaling device

The cross reference of related application

The application advocates the Korean Patent Application No. No.2015-0154282 submitted on November 4th, 2015 rights and interests Priority, disclosure of which is integrally incorporated by quoting with it herein.

Technical field

The utility model is related to blank descaling device, and more properly, is related to the squama for removing and being formed on circular blank surface The device of piece.

Background technology

It is used as the prior art for the device for being related to the scale for removing circular blank surface, the base on polishing homogeneous base surface Expect that burnishing device includes multiple rotating rollers, a polish brush and an impact vehicle (striking carrier), rotation Roller is formed in the length direction of blank, perpendicular to the axial rotation of blank, and wherein on blank surface disposed thereon, polish brush exists Formed above rotating roller, to polish the surface of rotary billet when being moved along the length direction of blank, and impact vehicle in rotation The side of transfer roller is formed, and blank is carried to the outside of rotating roller.

Prior art enables the blank with different length quickly and thoroughly polished.However, due to along blank Length direction movement when only have the surface that polish brush polishes blank, there is a problem, i.e., when blank length very Need to take a long time to polish when long.

Utility model content

The utility model be related to provide can further quick treated length very long blank blank descaling device.

According to one side of the present utility model, there is provided herein a kind of blank dephosphorization apparatus, it include two roller units, Two or more cutter units and propulsion unit, two roller units are separately positioned each other, extend before and after being formed as each, and configuration Into pivotally supporting circular blank；Length direction of two or more cutter units along two roller units is set, and is configured to edge The length direction for the blank being placed between two roller units performs cutting work while being evenly dividing the surface of the blank；And Propulsion unit is configured to the blank handled by each cutter unit being moved rearwards by.

Brief description of the drawings

Detailed description by referring to accompanying drawing to example embodiment of the present utility model, those skilled in the art will be brighter White of the present utility model above-mentioned and other purposes, feature and advantage.Wherein：

Fig. 1 is the front view of the blank descaling device according to the embodiment of the utility model one；

Fig. 2 is the plan of the blank descaling device according to the embodiment of the utility model one；

Fig. 3 is the side view of the blank descaling device according to the embodiment of the utility model one；

Fig. 4 is that the cutter unit in the blank descaling device according to the embodiment of the utility model one is looked over from surface Stereogram；

Fig. 5 is that the cutter unit in the blank descaling device according to the embodiment of the utility model one is looked over from the back lower place Stereogram；

Fig. 6 is the side view of the cutter unit in the blank descaling device according to the embodiment of the utility model one；

Fig. 7 is the section of the primary structure of the cutter unit in the blank descaling device according to the embodiment of the utility model one Figure；

Fig. 8 is to show the sectional view of the second deflector roll in Fig. 6 to the state moved down；

Fig. 9 is the decomposition of the primary structure of the cutter unit in the blank descaling device according to the embodiment of the utility model one Stereogram；

Figure 10 is the front view of the delivery unit in the blank descaling device according to the embodiment of the utility model one；And

Figure 11 is the side cross-sectional, view of the delivery unit in the blank descaling device according to the embodiment of the utility model one.

Embodiment

Demonstration implementation of the present utility model is described in detail hereinafter with reference to accompanying drawing.

As shown in figs. 1-11, roller unit 100, cutting list are included according to the blank descaling device of the embodiment of the utility model one Member 200, propulsion unit 300 and delivery unit 400.

As Figure 1-3, two roller units 100 are installed into separates each other, respectively forwardly and extends back, and rotatable Twelve Earthly Branches support circular blank 10 (reference picture 3).

As shown in figure 1, each of two roller units 100 includes setting multiple unit rollers 110 in a row, and unit roller 110 are connected to each other by connector 120, and are therefore together rotated.

As illustrated, underframe 500 is arranged under roller unit 100, so that each roller unit 100 is arranged on predetermined height. Underframe 500 not only supports roller unit 100, also supports cutter unit 200, propulsion unit 300 and delivery unit 400.

Moreover, being connected to two roller units 100 for rotating the driver element 600 of roller unit 100.

Driver element 600 includes engine and power transmission, and power transmission connects two Hes of roller unit 100 Engine, and two roller units 100 are rotated, and therefore rotate the blank 10 being placed between two roller units 100.

As illustrated, driver element 600 can be connected to rotate two roller units 100, and it can be connected with when necessary Only rotate one in two roller units 100.

Cutter unit 200 is used for the surface of cutting blank 10 and therefore moved up from blank 10 except scale, and such as Fig. 4-9 institutes Show, it may include installing plate 210, move up and down drive division 220, the first deflector roll 230 and cutter 240, wherein installing plate 210 is pacified Mounted in two tops of roller unit 100 that can move up and down, move up and down drive division 220 and move up and down installing plate 210, the first deflector roll 230 are connected to the downside of installing plate 210 and when installing plate 210 is moved down and the blank that is placed between two roller units 100 10 surface is in contact, and cutter 240 is connected to the downside of installing plate 210 to be arranged on the rear portion of the first deflector roll 230, and Cutting work is performed to the surface of blank 10 when first deflector roll 230 is contacted with the surface of blank 10.

Moreover, cutter unit 200 may also include the second deflector roll 250, roller drive division 260 and rotary shaft 270, wherein second leads Roller 250 is connected to the downside of installing plate 210 to be arranged on the rear portion of cutter 240 and can also move up and down, on roller drive division 260 Lower the second deflector roll of movement 250, and rotary shaft 270 is mounted to through the first deflector roll 230, cutter 240 and second deflector roll 250 Center.

Cutter unit 200 may include fore bearing cover 280 and rear bearing cage 290, rotary shaft drive division 2100, pressure roller 2160, Cylinder pressure 2170 and depth of cut adjustment means, wherein fore bearing cover 280 and rear bearing cage 290 are respectively connecting to installing plate 210 Lower surface front-end and back-end, to rotatably support rotary shaft 270, rotary shaft drive division 2100 rotates rotary shaft 270, Pressure roller 2160 is arranged on the top for the blank 10 being placed between two roller units 100, and the main body of cylinder pressure 2170 is connected to installation Plate 210 and bar are connected to more than 2160 times moving rollers of pressure roller 2160, and the regulation of depth of cut adjustment means is relative to blank 10 Depth of cut.

Two or more cutter units 200 are provided and are arranged on the length direction of each in two roller units 100.Such as Shown in Fig. 1 and 2, nine cutter units 200 can be provided that and are arranged at intervals at a distance of identical, and therefore each cutter unit 200 Perform cutting work, the state of cutting work is located in the surface of blank 10 between two roller units 100 along blank 10 Length direction be averaged division.

Installing plate 210 is installed in two tops of roller unit 100, and supports formation to cut by moving up and down drive division 220 Cut the other elements of unit 200.

As Figure 4-Figure 6, moving up and down drive division 220 may include to move up and down frame 221, first moves up and down the and of cylinder 222 Bracket 223, wherein moving up and down frame 221 installed in the side of underframe 500 to move up and down, first moves up and down the master of cylinder 222 Body is connected to underframe 500 and bar is connected to and moves up and down frame 221 and move up and down frame 221 to move up and down this, and bracket 223 is connected To the lower surface of installing plate 210.

Equally, moving up and down drive division 220 may include that middle boxes 224 and second move up and down cylinder 225, wherein middle boxes 224 lower end, which is connected to, moves up and down frame 221, and its upper end is hinged to bracket 223, and the second main body for moving up and down cylinder 225 It is connected to and moves up and down frame 221 and bar is connected to installing plate 210.

Here, from during cutter unit 200, bracket 223 and middle boxes 224 are located at installation in terms of the side surface of cutter unit 200 The center of the lower surface of plate 210, and the second bar for moving up and down cylinder 225 is connected to the lower surface of installing plate 210, to be placed on Opposite with rotary shaft 270 relative to the side that bracket 223 is installed.

Finally, moving up and down drive division 220 enables the first deflector roll 230 and cutter 240 to pass through operation about first Movable cylinder 222 simultaneously moves up and down with the closely located blank 10 between the two roller units 100 or therewith phase point of installing plate 210 From, when the first deflector roll 230 and cutter 240 are close to blank 10, by operation second move up and down cylinder 225 be rotatablely installed plate 210 cause the first deflector roll 230 and the extrusion billet 10 of cutter 240, therefore cutter 240 penetrates the surface of blank 10, and perform Cut work.

First deflector roll 230, the deflector roll 250 of cutter 240 and second are supported when being inserted into rotary shaft 270.Therefore, Cutter 240 is fixed to rotary shaft 270 by key, and as rotary shaft 270 is rotated, and the first deflector roll 230 and the second deflector roll 250 each are mounted to rotate independently of rotary shaft 270 by the bearing wherein installed.

Cutter 240 includes disc-shaped body and the multiple cutting blades being equidistantly spaced along the periphery of main body, And multiple cutters 240 are provided and in rotary shaft 270 with overlapped.However, in addition to said structure, cutter 240 are applicable to all kinds, its with rotary shaft 270 is rotated when perform cutting work to the surface of blank 10.

As Figure 7-9, roller drive division 260 may include to move up and down part 261, two guide blocks 262 and driving cylinder 263, wherein moving up and down part 261 has the cylindrical support portion being inserted between the deflector roll 250 of rotary shaft 270 and second 261a and formed in supporting part 261a rear ends and be adapted to rotary shaft 270 the quadrangle flange portion 261b to be moved up and down, two Individual guide block 262 is connected to rear bearing cage 290 to cover the both sides for the flange portion 261b for moving up and down part 261, and driving cylinder 263 Main body be connected to the upper surface of installing plate 210, and its bar is through installing plate 210 and is connected to the method for moving up and down part 261 Blue portion 261b.

Moving up and down part 261 can be formed such that the inner space for moving up and down part 261 is formed as perpendicular in one way Nogata is formed as one of the rotary shaft 270 than moving up and down the place of part 261 to very long ellipse, or the diameter of inner space Partial diameter is much larger, and therefore can be moved up and down when being assembled to rotary shaft 270.

Bearing is installed in the outside for the supporting part 261a for moving up and down part 261 to rotatably support the second deflector roll 250。

Two guide blocks 262 cover the both sides for the flange portion 261b for moving up and down part 261, and prevent from moving up and down part 261 transverse shifting.

Moreover, as shown in figure 9, the guide groove 261c formation that vertical extension is formed is moving up and down the flange portion of part 261 Every side of 261b both sides, and enter guide groove 261c guide protrusions 262a formation in each of two guide blocks 262.Cause This, guide block 262 prevented also from moving up and down the movable of part 261, and thus make to move up and down part 261 can successfully on Lower movement.

Finally, as shown in fig. 7, the first deflector roll 230 can support when installing plate 210 is contacted on the surface with blank 10 no longer leads to Moving down and dallying and move further downward for installing plate 210 is crossed, and thus cutter 240 can handle the surface of blank 10 And predetermined depth of cut is maintained simultaneously.Now, cutter 240 is by the high-speed rotation of rotary shaft 270, and thus performs to base The cutting work on the surface of material 10.

And as shown in figure 8, when the cutter of the cutter unit 200 by being arranged on two adjacent front sides of cutter unit 200 When the surface 11 of the blank 10 of 240 processing reaches the first deflector roll 230 of the cutter unit 200 for being arranged on rear side, the second deflector roll 250 Be moved downward by the operation to roller drive division 260, and with by be arranged on rear side cutter unit 200 cutter 240 The surface 12 of the blank 10 of reason is in contact.Now, between the second deflector roll 250 moved down and the processed surface of blank 10 Contact point is located on the contact point identical horizontal line between cutter 240 and the processed surface of blank 10.

Correspondingly, when the cutting by being arranged on the cutter unit 200 for being located at front side in two adjacent cutter units 200 When the surface 11 of the blank 10 of the processing of device 240 reaches the first deflector roll 230 of the cutter unit 200 for being arranged on rear side, the second deflector roll 250 support mounting plates 210 so that be arranged on rear side cutter unit 200 the first deflector roll 230 not with by be arranged on front side The surface 11 for the blank 10 that the cutter 240 of cutter unit 200 is handled is in contact.

In other words, after the contact of surface 11 for the blank 10 that the cutter unit 200 by being arranged on front side is handled is arranged on During the first deflector roll 230 of the cutter unit 200 of side, installing plate 210 is supported on the position of the first deflector roll 230 by the second deflector roll 250, And thus cutter 240 can handle the surface of blank 10 and while maintain predetermined depth of cut.

Rotary shaft drive division 2100 includes engine and power transmission, and wherein engine is arranged on installing plate 210 Upper surface, the engine of power transmission connect band rotary shaft 270 simultaneously is used for rotating rotary shaft 270.

Pressure roller 2160 is moved up and down by cylinder pressure 2170, and when moving down positioned at the downside lower than cutter 240.

Therefore, when installing plate 210 is moved down, pressure roller 2160 is contacted earlier than cutter 240 with the surface of blank 10, and Blank 10 is oppressed, and thus fixes blank 10 until the first deflector roll 230 is contacted with the surface of blank 10 so that cutter 240 can Stably penetrate the surface of blank 10.

When the first deflector roll 230 is contacted with the surface of blank 10, pressure roller 2160 can be moved again up, and thus can be with base Material 10 is separated.

As Figure 7-9, depth of cut adjustment means may include cam part 2110, internal bearings 2120 and outside axle 2130 are held, wherein cam part 2110 is installed in rotation between the deflector roll 230 of rotary shaft 270 and first, and in its structure The outer surface of cam part 2110 is centrally located at the center eccentric position with the inner peripheral surface of cam part 2110, interior Portion's bearing 2120 is arranged between rotary shaft 270 and cam part 2110, and external bearings are arranged on the first deflector roll 230 and convex Between wheel component 2110.

Moreover, depth of cut adjustment means may also include multiple patchholes 2140 and steady pin 21, wherein patchhole 2140 Formed in the side of cam part 2110 towards fore bearing cover 280 and to be arranged on the circumferential direction of cam part 2110, and it is solid Rationed marketing 2150 is inserted and passes through fore bearing cover 280 from fore-and-aft direction, and its one end is selectively entered in a patchhole 2140.

Here, each patchhole 2140 is set such that the pitch circle of patchhole 2140 and the interior weekly form of cam part 2110 Face has identical center.

According to the structure, the center of the center of the outer surface of cam part 2110 and the first deflector roll 230 can pass through selection Property the end of steady pin 2150 is inserted in a patchhole 2140 to move, and thus the depth of cut of blank 10 can be adjusted Section.

That is, when the center of the outer surface of cam part 2110 and the center of the first deflector roll 230 are based on rotary shaft When 270 center is moved up, the depth that cutter 240 penetrates blank 10 can increase, and when the outer weekly form of cam part 2110 When the center in face and the center of the first deflector roll 230 are moved down, the depth that cutter 240 penetrates blank 10 can be reduced.

Propulsion unit 300 is used for the blank 10 handled by each cutter unit 200 being moved rearwards by, and such as the institutes of Fig. 2 and 3 Show, it may include movable plate 310, plate drive division 320, support bar 330 and support bar drive division 340, wherein movable plate 310 are arranged on the side of each of two roller units 100 so that it can go forward in two respective length directions of roller unit 100 After move, plate drive division 320 moves forward and backward movable plate 310, and support bar 330 is arranged on the upper table of movable plate 310 Face to two roller units 100 to move forward and backward, and when moving forward into the blank 10 placed between two roller units 100 Front side, and support bar drive division 340 make support bar 330 move forward and backward.

Movable plate 310 is arranged on underframe 500 and is arranged on each cutter unit with relative to two roller units 100 200 opposite side, and it is well-known linear motion (LM) guide rail be arranged between movable plate 310 and underframe 500, its Thus movable plate 310 is connected with underframe 500 with movable.

Plate drive division 320 is configured with cylinder body, and its main body is fixed to underframe 500 and bar is connected to movable plate 310, and Thus the movable plate 310 is moved forward and backward on the length direction of two roller units 100.

Rush longer than the section (pitch) of each cutter unit 200 formation can be had by constituting the cylinder body of plate drive division 320 Journey.

Support bar 330 is formed as circular bar shape, and insertion is connected in the ball bushing 350 of the upper surface of movable plate 310, And moved forward and backward towards two roller units 100.

Support bar drive division 340 be provided to enable the main body of its support bar drive division 340 be fixed to movable plate 310 and The bar of support bar drive division 340 is connected to support bar 330, and thus moves forward and backward support bar 330.

Finally, propulsion unit 300 when movable plate 310 is moved forward by operating support bar drive division 340 to make branch Strut 330, which can enter, to be placed on before the blank between two roller units 100, and support bar 330 is supported blank afterwards 10 preceding surface and thus it is moved rearwards by therewith when movable plate 310 is moved rearwards by by operation panel drive division 320, and by This will be moved rearwards by by the blank 10 of cutting work disposal.

Delivery unit 400 is used for movement and is placed on blank 10 between two roller units 100 and not processed, and such as Figure 10 With shown in 11, it may include carriage 410 and frame drive division 420, and wherein carriage 410 is formed as in two roller units 100 The length direction of each extends and installed in two lower sections of roller units 100 to be moved up and down, and is moved down on frame drive division 420 Dynamic carriage 410.

In addition, delivery unit 400 may also include multiple support wheels 430 and wheel drive portion 440, plurality of support wheel 430 The length direction of carriage 410 is arranged on, is entered when carriage 410 is moved up between two roller units 100, and support is put The blank 10 between two roller units 100 is put, and wheel drive portion 440 rotates each support wheel 430.

As shown in figure 3, delivery unit 400 is arranged on the inner side of underframe 500 to be arranged on below two roller units 100.

And as shown in figure 1, the guide rod 450 that moves up and down of guiding carriage 410 be vertically installed at underframe 500 front end and Rear end is so that the carriage 410 of delivery unit 400 is smoothly moved up and down.

Carriage 410 includes lower carriage 411, upper carriage 412 and connecting portion 413, wherein lower carriage 411 is by setting Be toward each other two C-shaped girder steels formation so that with quadrangle tube shape, upper carriage 412 is by the upper of lower carriage 411 Connected at surface and be arranged to two plate shapes being separated each other in the width of lower carriage 411 into and connecting portion 413 formed Every end at the two ends of lower carriage 411.

Here, connecting portion 413 is formed such that the center vertical perforation of connecting portion 413, and thus slideably by guide rod 450 are inserted.

Frame drive division 420 is configured with cylinder body, and its main body is fixed to underframe 500 and bar is connected to carriage 410.

Constituting two or more cylinder bodies of frame drive division 420 can be set along the length of carriage 410.

Each support wheel 430 is included therein the sprocket wheel 431 being formed centrally and is connected to each in the both sides of each sprocket wheel 431 Individual disc plate 432.Support wheel 430 is installed in rotation on carriage 412 so that the first half of support wheel 430 is exposed to The upside of upper carriage 412.

Sprocket wheel 431 is connected to wheel drive portion 440 by chain, and disc plate 432 is formed as having more than the diameter of sprocket wheel 431 Diameter, and support is placed on blank 10 between two roller units 100 when carriage 410 is moved up.

Wheel drive portion 440 is configured with gear engine, and it is arranged on carriage 410, and is connected to by chain each Support wheel 430.

Finally, when support wheel 430 is rotated and propped up by the operation in wheel drive portion 440 when carriage 410 is moved up When support is placed on the blank 10 between two roller units 100, the transport blank 10 of delivery unit 400.Therefore, it is of the present utility model Blank descaling device may be such that can be easily positioned on by the blank 10 of the loading device (not shown) offer installed in front side The top of two roller units 100, and also may be such that can be easily by unloading installed in rear side by the blank 10 of cutting work disposal Carry and put (not shown) unloading.

According in blank descaling device of the present utility model, because two or more cutter units are by the surface edge of blank The length direction of blank is divided into predetermined section and handles the surface of blank, and the surface of blank can quickly be processed.

It will be apparent to those skilled in the art that can be made to above-mentioned example embodiment of the present utility model many Individual modification is without departing from spirit and scope of the present utility model.Therefore, it, which is intended that the utility model and covered, falls into appended right It is required that and its all above-mentioned modifications in the range of equivalent.

Claims

1. a kind of blank descaling device, including：

Two roller units (100), it is set to separate each other, extends before and after being formed as each, and be configured to rotatably support Circular blank (10)；

Two or more cutter units (200), its length direction along described two roller units (100) is set, and is configured to edge The length direction of the blank (10) is evenly dividing the table for the blank (10) being placed between described two roller units (100) At the same time face simultaneously performs cutting work；With

Propulsion unit (300), it is configured to be moved rearwards by by the blank (10) of each cutter unit (200) processing,

Wherein, each cutter unit (200) includes：

Installing plate (210), it is arranged on above described two roller units (100) to move up and down；

Drive division (220) is moved up and down, it moves up and down the installing plate (210)；

First deflector roll (230), it is connected to the downside of the installing plate (210), and when the installing plate (210) is moved down Contacted with the surface for the blank (10) being placed between described two roller units (100)；

Cutter (240), it is connected to the downside of the installing plate (210) to be arranged on behind first deflector roll (230), And cutting work is performed to the surface of the blank (10) when first deflector roll (230) contacts with the surface of the blank (10) Make；

Second deflector roll (250), it is connected to the downside of the installing plate (210) to be arranged on behind the cutter (240) And can also move up and down；With

Roller drive division (260), it moves up and down second deflector roll (250)；And

Wherein, when the cutting for the cutter unit (200) that front side is arranged in two adjacent cutter units (200) The surface of the blank (10) of device (240) processing reaches described the first of the cutter unit (200) for being arranged on rear side and led During roller (230), second deflector roll (250) moves down, and with by be arranged on rear side the cutter unit (200) cutting The surface of the blank (10) of device (240) processing is in contact, and

Contact point between second deflector roll (250) moved down and the blank (10) and the cutter (240) and Contact point between the blank (10) is located on identical horizontal line.

2. device as described in claim 1, wherein each cutter unit (200) also includes：

Rotary shaft (270), it is mounting through in first deflector roll (230), cutter (240) and the second deflector roll (250) The heart；

Fore bearing cover (280) and rear bearing cage (290), its be each attached to the lower surface of the installing plate (210) front end and Rear end is to rotatably support the rotary shaft (270)；

Rotary shaft drive division (2100), it rotates the rotary shaft (270)；With

Depth of cut adjustment means, it adjusts the depth of cut of the blank (10)；And

Depth of cut adjustment means include：

Cam part (2110), it is installed in rotation between the rotary shaft (270) and first deflector roll (230), and The center of the outer surface of cam part (2110) described in its structure and the inner peripheral surface of the cam part (2110) Center is mutually eccentric；

Inner bearing (2120), it is arranged between the rotary shaft (270) and the cam part (2110)；

Outer bearing (2130), it is arranged between first deflector roll (230) and the cam part (2110)；

Multiple patchholes (2140), it forms in the side surface of the cam part (2110) to point to the fore bearing cover (280), and along the circumferential direction of the cam part (2110) set；With

Steady pin (2150), it is inserted with through the fore bearing cover (280) along the longitudinal direction, and its one end is selectively entered One of them of the patchhole (2140).

3. device as described in claim 1, wherein the propulsion unit (300) includes：

Movable plate (310), it is arranged on the side of each of described two roller units (100) with along described two roller lists The length direction of each can be moved forward and backward in first (100)；

Plate drive division (320), it moves forward and backward the movable plate (310)；

Support bar (330), it is arranged on the upper surface of the movable plate (310) with can be towards described two roller units (100) move forward and backward, and to enter the blank that is placed between described two roller units (100) when moving forward before Side；With

Support bar drive division (340), it moves forward and backward the support bar (330).

4. the device as described in any in claim 1-3, in addition to delivery unit (400), its movement are placed on described two Between roller unit (100) and the still untreated blank (10),

Wherein, the delivery unit (400) includes：

Carriage (410), it is formed as along the length direction of each extension in described two roller units and installed in described To move up and down below two roller units；

Frame drive division (420), it moves up and down the carriage (410)；

Multiple support wheels (430), its length direction along the carriage (410) is set, in the carriage (410) to moving up Enter when dynamic between described two roller units (100), and support is placed on the blank between described two roller units (100) (10)；With

Wheel drive portion (440), it rotates each described support wheel (430).