CN1236896C

CN1236896C - Stapler for forming staples to various sizes

Info

Publication number: CN1236896C
Application number: CNB008116881A
Authority: CN
Inventors: D·P·亚当斯; V·弗里德马诺维奇
Original assignee: Acco Brands Inc
Current assignee: Acco Brands Inc
Priority date: 1999-06-11
Filing date: 2000-06-12
Publication date: 2006-01-18
Anticipated expiration: 2020-06-12
Also published as: EP1220737A4; JP2003501281A; WO2000076730A1; EP1220737A1; HK1048785A1; DE60045251D1; EP1220737B1; TW490367B; CN1370102A

Abstract

A staple forming mechanism having at least first and second configurations, the forming mechanism including: (a) a bend plate assembly (110) having a top surface engageable with a crown portion of a staple (136), the top bend surface having a first surface width in the first configuration, and a second surface width greater than the first width in the second configuration; and (b) a former assembly (65) having at least two operative side portions (72) disposed laterally adjacent and on opposite sides of the top bend surface and engageable with leg portions (138) of the staple, the operative side portions being separated by a former space that has a first former width in the first configuration, and a second former width greater than the first former width in the second configuration; wherein the operative side portions (72) and the bend plate (110) are operatively associated and movable to a forming position with the bend plate (110) disposed in the former space for such that the operative side portions (72) bend legs of a staple about the bend plate to produce first or second crown widths of the staple corresponding to the first or second widths when in the first or second configurations, respectively. Staplers for stapling staples of different crown size are also included, as well as staplers including the above-described staple forming mechanism.

Description

Staple builder and stapler

Technical field

The present invention relates to a kind of staple builder and a kind of stapler.

Background technology

Standard-sized nail can only be used for binding the interior paper of predetermined thickness range or the lamination of other material.Usually, binding thicker lamination needs the long leg nail, and the thin lamination of bookbinding can be followed closely with short-leg.Standard-sized nail for example can be used to bind the lamination of 20～30 pages or 30～70 pages scopes.

United States Patent (USP) 4318555 is mentioned a kind of stapler, can be cut and be struck out the nail of multiple size by the wire of continuous supply.This stapling functional profile height of lamination that is in sheets, and select wire length to be cut in view of the above.Then the blank that downcuts is struck out nail, again the lamination that ailing is gone into to be in sheets.Owing to can select the wire of different length, therefore can strike out the long nail of different legs, and keep the top width degree constant.

United States Patent (USP) 4583276 and 5007483 proposes several staplers, all adopts the long dish that comprises a straight staple blank band.The blank band is transported in the former, and former becomes blank into the nail of single size, and driver will become staple to push in the curved groove seat again, makes the nail leg towards the lamination bending.

Summary of the invention

The purpose of this invention is to provide a kind of like this stapler, it can supply with the blank nail of predetermined length, and the blank nail is struck out nail narrower or the broad top dimension selectively, and preferable be that it has corresponding long leg or short leg.Therefore, can adopt unique blank nail source of supply, bind the lamination of larger size range by the staple configuration that changes output.

One aspect of the present invention has provided a kind of staple builder, and this builder comprises:

(a) bent plate assembly, it has a top bent face that can be meshed with the staple top, and this top bent face has:

(i) one in first configuration the first surface width and

(ii) second surface width wideer than first surface width in second configuration; With

(b) former assembly, it has at least each sidepiece of two work sidepieces and above-mentioned top bent faces horizontal adjacent and relative, and can be meshed with the shank of staple, and the work sidepiece of the former that is separated by the shaping spacing has:

(i) one in first kind of configuration first kind of shaping width and

(ii) one is compared first kind of second kind of shaping width that the shaping width is wide in second kind of configuration;

It is characterized in that, the work sidepiece is operationally to be associated with bent plate, and the bent plate in the spacing that can be shaped relatively moves to shaping position, so that respectively first or second kind of configuration in, the work sidepiece will curve the nail leg round bent plate, produce corresponding to first or the staple of first or second kind of top width of second kind of width.

Another aspect of the present invention has provided a kind of stapler, and it comprises:

(a) aforesaid builder;

(b) driver, it comprises first and second drive parts, the driving end face that the first and second driver width are arranged respectively, in first and second kinds of configurations, the stapling that is used for driving first and second top dimension respectively is pinned in the lamination that is provided with below the driver.

It is characterized in that first former part is determined a groove between two first sidepieces, first driver portion is configured in the described groove, and this driver is associated with one of former part at least, with this move first or second kind of configuration in.

The accompanying drawing summary

Fig. 1 is the side view of a kind of stapler preferred embodiment constructed according to the invention;

Fig. 2 is the partial top view of the foregoing description;

Fig. 3 is the fragmentary cross-sectional view of above-mentioned stapler actuating mechanism;

Fig. 4 and Fig. 5 are the side cutaway views of above-mentioned stapler former/drive combination;

Fig. 6 is the fragmentary cross-sectional view of the former of above-mentioned stapler;

Fig. 7 is the perspective drawing in side sectional elevation of former and crooked assembly;

Fig. 8 is the enlarged drawing of former/drive combination;

Fig. 9 is former and the top view profile of crooked assembly when making the nail of different configurations with Figure 10;

Figure 11 and Figure 12 are the profilographs of wide top pin structure forming process;

Figure 13 is the part side view of former/drive combination;

Figure 14 is vertical view of combinations thereof;

Figure 15 is the side view after combinations thereof is finished forming step;

Figure 16 is former and the part top view profile of crooked assembly when making narrow top nail;

Figure 17 and Figure 18 are the profilographs of narrow top pin structure forming process;

Figure 19 is the enlarged drawing that former/drive combination is made narrow top nail;

Figure 20 is the perspective view of another embodiment of former/drive combination;

Figure 21 is the front sectional elevation of the curved nailing machine structure preferred embodiment of stapler constructed according to the invention;

Figure 22 and Figure 23 are respectively the partial front elevation view of curved another embodiment of nailing machine structure when making curved wide top and narrow top nail;

Figure 24 is the partial front elevation view of the rotary positioning mechanism of the foregoing description.

The detailed description of preferred embodiment

With reference to figure 1, the preferred embodiment of a stapler 10 constructed according to the invention has a base 12, and this base 12 can be fixed on the housing, or another device, for example on the duplicator.Base 12 has side part 14, and it can draw this patent as a reference hereby by U.S. Patent No. 5076483 disclosed method manufacturings.Axle 16 is installed in the hole of above-mentioned side part, and is preferably fixed by the circular clamping washer that is positioned in axle 16 mounting grooves.Base 12 also is equipped with the curved part actuator 18 that can pivot.Curved part actuator 18 comprises a kickplate 20 and upright side part 22, and a cam lobe 24 is arranged on this side part 22, is meshed with external cam pin 26 on the cam 28, and is as described below, cause actuator 18 partly up and down rotation be used for actuating curved part.

Driving control device 30 also is to be rotatably installed on the axle 16, and this driving control device comprises two frame members 32 and a head part 34.Preferred stapler 10 also has a U sprig ailhead, also is to be rotatably installed in to have one to drive and builder on the axle 16 in this U sprig ailhead.

With reference to figure 2, U sprig ailhead 36 has two sides that are isolated from each other 38.Driving control device 30 is preferably driven up and down by an arm-type eccentric wheel 40 of dumbbell, and this eccentric wheel 40 is rotated by gear wheel 42 again.

Head part 34 is supporting motor 44, spur gear 46 and gear wheel 42, dumbbell type eccentric wheel 40 can have two disks 50 around axle 48 rotations, and they preferably are made of one part with transverse tube 52.One of them disk 50 is preferably by latch fitting 54 and gear wheel 42 interlockings.Cam 28 and another disk 50 can be together round axle 48 rotations.Arm 54 has the quoit opening round disk 50.Propose a kind of alternative actuating mechanism in United States Patent (USP) 5413266, in this mechanism, the arm of binder mechanism is driven by a pin that is engaged in the follower flute, introduces this patent hereby as a reference.Erect image those skilled in the art all know, other actuating mechanism comprises independent motor or other mechanism.

With reference to figure 4 and Fig. 5, a chuck 56 is housed in stapler.This chuck is preferably in has blank nail to be with 58 on the roller bearing.Other embodiment, as known in the art, the short lamination bar of available blank nail, or the other conveying mechanism is given former/driving mechanism supply blank nail.When binding a stacker, as shown in Figure 5, when a stacker of being in sheets or other material 62 pushing travel switches 60, filler 44 just rotates spur gear 46, and spur gear 46 rotation gear wheels 42 cause dumbbell type device 40 around axle 48 rotations.When 48 whens rotation of device, it causes 50 rotations of plastics eccentric disc, cause driving control device 40 around axle 16 to lower swing.When driving control device 30 moved downward, pressure head 46 also rotated facing to lamination 62 downwards, and head part 34 tightly suppresses driving actuator 64.

This stapler has a former 65 and a driver 66, and they constitute one former/drive combination or mechanism together.With reference to figure 6, this former preferably includes at least one little former part 58 and a big former part 70.Big former part 70 has two sidepieces 72 and the bottom 74 that links to each other with both sides 72.As shown in Figure 6 and Figure 7, little former partly is placed between two sidepieces 72 and is relying on bottom 74.As shown in Figure 8, connecting plate 76 is placed on two sidepieces 72 and the little former 68 and pastes mutually with them, and is fixed by bolts on two sidepieces 72 by two screwed holes 78.Connecting plate 76 partly links to each other big or small former with the bottom 74 of big former part 70, can do catenary motion together basically.Yet little former part 58 links to each other with big former part 70 slidingtypes and can do front and back to slip.For convenience's sake, this use only relate to before and after vertical, the level to etc. motion, though different embodiment also can do different location.

Little former 68 has a slotted eye 80 vertically to run through wherein, and leads to the circular hole 82 in the bottom 74 of big former part 70.This slotted eye 80 is accommodated a configuration selector axle 84, and this axle 84 runs through wherein, and through hole 82 and the hole aimed at it on connecting plate 76.There is a face 86 that flattens to be engaged in the gear drive 88 in the upper end of Control Shaft.Gear drive 88 is driven by belt 90 successively, and 90 of belts are driven by stepper motor 92.

Little former part 68 comprises two little sidepieces 92, at groove 96 places by spacing 94 separately.Be blank restriction recess 98 below each little sidepiece 92, when the blank nail is with 58 to head on former, can limits it and cross shaping and activation point.Equally, big former part 70 has blank restriction recess 100 under two sidepieces 72, also is to be used for when being shaped and drive the blank of front nail 58 location in position.Each axis of guide 102 runs through each hole of aiming at it on each hole 104 of big former part 70 and the connecting plate 76.These axis of guides 102 are fixed at their tops, place, the ends two, so that lead for the catenary motion of former.The both sides 72 of big former part 70 are separated by spacing 106, and this spacing equals the width of little former part 68 in fact.

Former/drive combination as shown in the figure is applicable to the nail that is shaped and drives wide top short-leg.In this configuration, the eccentric part 108 of axle 84 is located little former part 68 backward, exposes spacing 106 between two big sidepieces 72.

A bent plate assembly 110 preferably is configured to integral piece, but can comprise the motion parts of separation.With reference to figure 7 and Fig. 9, bent plate 110 preferably includes a little turn of bilge 114 and a big turn of bilge 116, and they are vertically adjacent each other.The leading edge of bent plate 110 flexiblely is biased in little by anterior 68.The width 19 of big plate 116 is little more a certain amount of than spacing 106, and is enough to provide between the transverse edge of big turn of bilge 116 and big sidepiece 72 each nail leg gap 120.In this configuration, the blank of two big sidepieces 72 restriction recess 100 will stop that previous blank nail 58 travels forward.The spring and the mechanism 122 of feeding forward preferably are provided, and the anti-part 124 that contracts, it is operated in the known mode of those of ordinary skills.U.S. Patent No. 4583276 discloses a kind of suitable mechanism, quotes as a reference hereby.Other advanced mechanism also is suitable for, for example a direct rotating band of CD-ROM drive motor or drive and have other element of pass.

With reference to figure 4, Fig. 8 and Figure 10, a driver 126 preferably includes a little driving leaf 128 and the big leaf 130 that drives.Little driving leaf is contained in the groove 96 of little former part, and has essentially identical width 94.The big leaf 130 that drives preferably contacts with little driving leaf 128, and its position leans against the front surface of little former part 68 in the face of bent plate assembly 110.Therefore two drivers preferably can travel longitudinally with little former part 68 together.

Drive leaf

128 and 130 end face 132 and 134 of driving is respectively arranged.In wide thimble configuration, bent plate 110 tops work bent face is the end face of big turn of bilge 116, and when the preceding blank of driving end face 134 from top aligning bent plate 110 tops work bent face of big driving leaf 130 followed closely, this end face 134 was just as driving working face.In this configuration, punctual from 58 pairs of top and preceding blank nails when the both sides 72 of big former part 70, both sides 72 are exactly the former both sides of work in addition.Therefore the both sides 72 of work are laterally adjacent each other with the both sides of the top bent face of work and be opposite side.Little sidepiece 92 and little turn of bilge 114 are positioned at outside the plane of running through working face and preceding blank nail 58.

With reference to Figure 11, the preferably further vertical diameter that extends beyond blank nail 58 of blank restriction recess 98 and 100, vertical more excellent size be surpass blank follow closely 58 diameters half to one times.Usually, blank nail cross sections is oval, and bigger use is of a size of 0.022 inch, and less use is of a size of 0.018 inch.The optimum vertical added size of blank restriction recess is between 0.01～0.015 inch.As shown in the figure, big turn of bilge 116 is meshed with the top 136 of blank 58, and the sidepiece of work is meshed with the still unbent shank 138 of blank 58.When the pressurization downwards of the relative bent plate 110 of former, the both sides that the sidepiece of two work just centers on the big turn of bilge 116 of work curve leg downwards.Thereby little bent plate is not because of curving blank 58 in the plane of blank nail 58.The sinciput width is less than or equal to spacing 106, and more than or equal to width 118.The shaping leg of nail 58 is positioned among gap or the interval 120.

Big former part 70 preferably also comprises the inclined-plane 139 of two protruding lock sections 141, and each inclined-plane alignment can drive the corresponding protruding lock section 143 of bent plate 110 when making it along an orbital motion.When passing through at certain vertical after former is finished the leg shaping of blank nail 58 at the volley, the protruding lock section 141 of former just makes bent plate 110 displacements, leaves the driving route of driver, therefore the ailing of shaping is gone in the lamination 68.Protruding lock section or can be positioned on another element, same former/drive combination is moved together, or bent plate can lean on for example another motor or solenoid or the motion simply independently of other device.

With reference to Figure 13 and Figure 14, little driving leaf comprises a plurality of legs 140, is engaged on the top of connecting plate 76 rotationally.As Fig. 8 finding, driving actuator 64 has a straight pusher section 42, and it preferably is fixed on the top of little driving leaf.In wide thimble configuration, push rod 142 is also aimed at the big leaf 130 that drives.Therefore, when driving control device 30 heads on driver 64 when moving downward, push rod 142 is biased downward

blade

128 and 130 simultaneously, and each bar leg 140 biased downward former as described, causes former to curve nail leg 58.In case drive actuator 64,

drive leaf

128 and 130, and former vertical ground motion to the precalculated position, on enough height that the nail leg has formed, just utilizing preferably is fixed on the housing, be preferably each leg 140 that a plurality of inclined-planes of being fixed on outside the former 145 drive little driving leaf 128 and move, unclamp former, and picture as shown in Figure 15 towards the direction of blank chuck 56, allow driver continue to move downward, separate with former.As shown in Figure 5, become the staple 58 and the termination of blank band to separate, and be tufted in the lamination 62.When gear wheel 42 continues rotation, and promote when driving actuator 64, being fixed on the driver, the button 44 that preferably is fixed on the connecting plate 76 is just taken in the slit 146 of little driving leaf 128, touch with the side edge of slit 146, and the former liter is got back to the starting position.

The operation stepper motor preferably rotates about 180 degree to Control Shaft 84, can select the configuration corresponding to second kind of nail of narrow top spike leg.As shown in figure 16, eccentric part 108 makes little former part 68 towards bent plate 110 displacements, and bent plate also and then moves.At this moment two

former parts

68 and 70 leading edge preferably flush.Blank restriction recess 98 and 100 is aimed at now, thereby preceding blank nail 58 is arranged among the recess, and withstands large and small former 68 and 70.As Figure 17 and shown in Figure 180, the top work surface of bent plate 110 is little turn of bilges 114, and the sidepiece of work is little sidepiece 92.When the relative bent plate 110 of former moved downward, little sidepiece 92 will be meshed with the shank 138 of blank between bent plate 110 and the sidepiece 92 nail 58, and makes it to curve.As seen in Fig., when staple was this configuration, the top width degree was narrower, and shank is longer.This configuration nail is fit to bookbinding than the thick lamination 68 of the wide top configuration the most suitable bookbinding lamination of nail.

With reference to Figure 19, the big driving leaf that is positioned at now above top second blank nail 58 is no longer aimed at push rod 42.Therefore when push rod when blank is followed closely the little driving of 58 direction bias voltages leaf 128, push rod 142 will be from big driving leaf 130 next door processes, drive greatly leaf stapler be shaped and the driving stroke in preferably keep off working state.Figure 19 has also shown a spring 146, finish the shaping stroke after, available it promote former, the retainer 148 that heads in 136 is got back to initial state.

Preferably, stapler should comprise a thickness transducer that people know in the present technique field, is placed near the bookbinding district 150, to determine the thickness of lamination.Be lower than a predetermined value if detect the thickness of lamination, for example below 50 pages, so preferably, rotate Control Shaft, make stapler become wide top configuration by electronic installation or electric wiring operation stepper motor.If sensor is measured the thickness of lamination more than predetermined value, so preferably allow stepping revolution Control Shaft, make stapler become narrow top configuration.U.S. Patent No. 4134672 provides the example of a laminated thickness electric control gear.In other embodiments, be with or without under the situation of electronic installation, available hand or device rotating shaft 84 also can make it to locate to select the thickness of lamination, make stapler other mechanism of configuration again but also can use.For example, solenoid or independent motors together or independently motion former and driver can be arranged, or, comprise and to come suitably configuration stapler by operator's manual adjustment with other actuating mechanism.In addition, also can be with partly the be shaped staple of two above predetermined configuration of plural former.In an alternative embodiment, also can allow push rod 142 be associated, to simplify its lengthwise movement with another cam on the Control Shaft 84.

Figure 20 shows that another embodiment of former/actuator mechanism.This embodiment also constructs to such an extent that can make staple be configured as two kinds of top dimension and optional one.This stapler comprises central leaf 152, lateral lobe 154 and siphonal lobe 156.

The bent plate assembly comprises the little width portion and the big width portion 160 that are preferably fixed part 158.Big width portion 160 relatively little width portion 158 preferably can longitudinal sliding motion, but little width portion 158 and big width portion 160 also can be fixed together, and is similar to the bent plate 110 in first preferred embodiment of having described.

In the configuration of narrow top, leaf 152,154 and 156 position are all represented with solid line with the position of plate 158 and plate 160.In this configuration, the former assembly comprises

leaf

156 and 154, and their relative blanks nail keeps flat the operate portions of the bent plate on it, and promptly little bent plate portion 158 travels forward together.Have the nail leg in case blank nail curves between two leaves 154 and little bent plate portion 158, when bent plate vertically shifted out the movement locus of driver 152, leaf 152 just played a driver effect, dropping to shaping and nailing on, and staple is hammered in the lamination.In this configuration, leaf 152 constitutes actuator assembly.

Dotted line among Figure 20 is represented each leaf best start position in the configuration of wide top.In this configuration, wide bending plate 160 be positioned at each leaf below, and actuator assembly comprises

leaf

152 and 154, their relative two siphonal lobes 156 initial positions that raising.In this configuration, the former assembly only comprises leaf 156 now, and leaf 156 descends laterally adjacent with big bent plate portion 160, and along the bent plate rhaeboscelia, being shaped one has the finished product on wide top nail on a diverse location.Each plate can split movement, for example uses solenoid, and link gear has and intersects motor or any other suitable mechanism of screw rod, and is identical with the situation of bent plate assembly.Have, shown leaf also can be made other shape again, needn't be for straight, and can comprise accessory lobe at leaf in pairs, with the staple of the additional top width size that is shaped.With reference to Figure 21, preferably curved nailing machine structure comprises two curved parts 152 that have bent face 164 respectively.Bent face 164 preferably is configured in vertical an angle, and in the face of the bookbinding district.Curved part 162 preferably can be along so curved nail orbiting motion, no matter what top width size, can both intersect with the place that nail leg 138 passes the lamination that is in sheets in pairs.The lateral separation of two bent faces 164 reaches the maximum top width degree of staple of use that stapler disposes at least.

Curved part preferably is installed in the housing 166, and this housing comprises a passage, and channels configuration becomes can draw curved piece of lead 162 and moves along curved nail track.Preferred version is, each curved part 162 all comprises a guide part 168, is contained in the housing 166 and is directed to.Preferred curved nail track is linear, as shown in figure 21, still also can adopt other track.Curved nail track is preferably selected like this, to such an extent as to no matter two nail positions of legs or spacing are how, bent face can both be basically with identical contact angle, or the angle in the preferable range begins contact with the nail leg, and whether has the top width size of the staple of energy usefulness regardless of stapler.

In this embodiment, when cam pin 26 engagements and 24 rotations of drive salient angle, that is to say when allowing kickplate 20 move downward that curved part 162 begins action.Its course of work is that kickplate 20 engagements and the relevant linkage 170 of frame 12 activities make linkage 170 rotations, are pushing away curved part 162 displacements.Curved part 162 will hammer into the nail leg bottom bend in the anvil block 172 under the lamination along curved nail track.The curved part of starting also has other method, and for example solenoid that is to say, other any part of stapler also can be started with control electronic installation or electric circuit.In addition, curved part can be with linkage 170 articulatings, and linkage 170 can be with the kickplate articulating, therefore when kickplate 20 upwards returns, it will spur linkage 170, and make curved part 162 turn back to its starting point, so that admit the leg of the next staple that is in sheets.In this embodiment, can allow curved part 162 along of the bending direction rotation of curved nail track to the nail leg, or with 90.Angular bend nail leg.

In the embodiment of the curved nailing machine structure shown in Figure 22～24, curved part is made of two curved leaves 172, and they can be actuated by kickplate 20.Each curved leaf 172 preferably is installed on the axle 174, and the part that axle 174 is accommodated in stapler for example in the slit 176 of base frame 12, and can be slided therein.

Among the figure, each curved leaf 172 is located by axle 174, and corresponding axle point can move in a width 178 intervals abreast with axle.Therefore when they be center when heading on 138 rotations of nail leg with the axle, the nail leg that just can make wide top 136 is bent leaf together with selectable the most effective contact angle and is contacted.In Figure 23, diaxon 174 displacement toward each other, to such an extent as to can be less than a distance 180 between them apart from 178, nail two long and nearer legs 138 in narrow top are contacted to bend leaf together with essentially identical angle shown in Figure 22, but still in an acceptable angular range.

With reference to Figure 24, preferred version provides an axle control piece 182, and can move in vertical direction, so as with diaxon 174 located lateral among two slits 176.In this embodiment, curved nail track is bound the district relatively and is generally arc, and hope is the shape of nail leg 138, and therefore can move curved nail track by mobile diaxon point.

Those skilled in the art in this technical field can dream up multiple change and modification.In the true spirit and scope of following claims, can reckon with all these modification.

Claims

1. staple builder that has first and second kinds of configurations at least, this builder comprises:

(i) one in first configuration the first surface width and

(i) one in first kind of configuration first kind of shaping width and

2. builder as claimed in claim 1 is characterized in that, described former assembly comprises:

(a) first former part that comprises one first sidepiece at least; With

(b) second former part that comprises one second sidepiece at least;

It is characterized in that first and second formers part can be located selectively, in first and second kinds of configurations, the bent face relative with one of work sidepiece is laterally adjacent, to determine another work sidepiece respectively.

3. builder as claimed in claim 2 is characterized in that:

(a) above-mentioned at least one first sidepiece comprises two first sidepieces that separated by the first shaping width, and determines the work sidepiece in first kind of configuration; With

(b) above-mentioned at least one second sidepiece comprises two second sidepieces that separated by the second shaping width, and determines the sidepiece of respectively working in second kind of configuration.

4. builder as claimed in claim 3 is characterized in that, two first sidepiece landscape configuration are between two second sidepieces.

5. builder as claimed in claim 4 is characterized in that, in first kind of configuration, first and second sidepieces all are configured to align with the top bent face.

6. builder as claimed in claim 4 is characterized in that, first and second formers partly are joined together makes catenary motion.

7. stapler comprises:

(a) builder as claimed in claim 3;

8. builder as claimed in claim 2, also comprise a cam, at least rotatably be associated with one of former part, can one of above-mentioned former part be driven corresponding to the position of first kind of configuration or corresponding to the position of second kind of configuration by above-mentioned cam.

9. builder as claimed in claim 1 is characterized in that:

(a) the bent plate assembly comprises:

(i) first plate portion that first width is arranged; With

(ii) second plate portion that second width is arranged;

(b) it is characterized in that, this bent plate assembly is associated movingly with the former assembly, to such an extent as to first and second plate portions can be positioned in the turn of bilge of first and second kinds of work sidepieces in the configuration selectively respectively, and be adjacent, therefore be positioned at one of first and second plate portions in this turn of bilge and can determine the top bent face.

10. builder as claimed in claim 9 is characterized in that:

(a) this former assembly comprises:

(i) one first former part comprises one first sidepiece at least,

(ii) one second former part comprises one second sidepiece at least, it is characterized in that, in first and second kinds of configurations, first and second formers parts can be distinguished location selectively, and the bent face relative with one of sidepiece of its work is laterally adjacent, to determine another work sidepiece; With

(b) the bent plate assembly flexiblely is biased on one of them former part, to such an extent as to this former part athletic meeting between first and second kinds of configurations causes the motion betwixt of bent plate assembly.

11. builder as claimed in claim 10 is characterized in that:

(a) above-mentioned at least one first sidepiece comprises two first sidepieces that separated by the first shaping width, and determines two work sidepieces in first kind of configuration, and first former part is determined a groove between two first sidepieces; With

(b) the bent plate assembly is bias voltage flexiblely, to such an extent as to first plate portion is contained in the above-mentioned groove, and second plate portion contacts with first sidepiece.

12. builder as claimed in claim 9 is characterized in that, first and second plate portions are integrative-structures.