Patent documentation 4: TOHKEMY 2000-334832 communique.
Summary of the invention
In the prior art of above-mentioned patent documentation 4, on the connecting rod of a side of the clamping device that the connecting rod that constitutes linkage is being set, fixing pitman shaft, the opposing party's connecting rod can rotate relative to pitman shaft.And, since be with the bearing mount pad be installed on pitman shaft bottom, the trough of belt journal bearing is installed on the structure of bearing mount pad, so in fact pitman shaft and bearing mount pad become one, the structure that has become the bearing mount pad can not rotate relative to pitman shaft.
Therefore, the intersecting angle of the relative guide rail of connecting plate changes when opening when connecting rod is closed, the intersecting angle that links the center line of mounting center of 2 trough of belt journal bearings being installed on the bearing mount pad and guide rail is different, promptly, even intersecting angle is 90 ° under the state of connecting rod closing, intersecting angle was also little than 90 ° when connecting rod was opened.Therefore, have following problem: interval that connecting rod is opened, promptly between zones of extensibility at tablet with the extension of tablet after the feeding interval, the width of the guide rail that the trough of belt journal bearing must be clipped is controlled to be narrower size corresponding to intersecting angle, and makes the maintenance management of the guide rail trouble that becomes.
Purpose of the present invention promptly is to address the above problem and to provide the spreadboard that can reach the tablet of high speed with simple structure.
Another object of the present invention is to address the above problem and to provide the spreadboard that can reach the tablet of high-speedization, while MD multiplying power stepless variable with simple structure.
For achieving the above object, in the spreadboard of tablet of the present invention, the spreadboard of this tablet drives the ring-type linkage that is made of a plurality of isometric linkage that forms the folding rule shape along guide rail, the extension tablet, it is characterized in that, described guide rail is adjusted the setting in pairs of extensible extent ground corresponding to the inboard of described isometric linkage and the pitman shaft in the outside, this guide rail is formed by the convex member, the a pair of rolling bearing that the two sides separately of guide rail are configured in described pitman shaft below clips, by being configured in described isometric linkage below and the described long connecting rod that waits of the top contacted bearing supporting of described guide rail.
For achieving the above object, in the stretching-machine of tablet of the present invention, the spreadboard of this tablet is provided with the ring-type linkage that has a plurality of clamping devices of the end of controlling tablet in the two side ends of described tablet, this ring-type linkage is formed by a plurality of isometric linkage that forms the folding rule shape, chain wheel drive by entrance side and outlet side, the described isometric linkage of sending from described entrance side sprocket wheel, walk with the guide rail guiding by the paired guiding that becomes the configuration of enlarging shape at direct of travel, after being extended, described tablet takes off tablet, get back to described entrance side sprocket wheel by described outlet side sprocket wheel, it is characterized in that the interval of described paired guide rail changes between the sprocket wheel of described entrance side and outlet side; Joint is arranged on the connecting plate of the folding rule portion that forms described isometric linkage with pitman shaft, be positioned at described guide rail separately above joint with pitman shaft bottom relatively this pitman shaft first rolling bearing, second rolling bearing are installed rotationally, be provided with the pair of bearings retainer that keeps described first rolling bearing, second rolling bearing respectively, can rollably disposing paired rolling bearing respectively with respect to described pair of bearings retainer.
In addition, in the spreadboard of described tablet of the present invention, a pair of rolling bearing as journal bearing, is had flange above the periphery of each journal bearing, the lower surface of this flange and guiding relatively are configured with the top of guide rail.
In addition, in the spreadboard of described tablet of the present invention, further, set spherical bearing, this spherical bearing is rolled above described each guiding usefulness guide rail in each bottom that engages with pitman shaft.
In addition, in the spreadboard of described tablet of the present invention, further, have fixing a plurality of guiding with the side's side in the guide rail, make the opposing party's side shifting and make the variable travel mechanism of open angle of isometric linkage.
In addition, in the spreadboard of described tablet of the present invention, further, be provided with the revolution action limiting device, this revolution action limiting device is used for limiting the revolution action as the relative connecting plate of retainer of the peripheral part of the bearing with a pair of journal bearing, described connecting plate and to be loaded on the bearing bottom that engages with pitman shaft adjacent.
In addition, in the spreadboard of described tablet of the present invention, further, establish groove on guide rail, be provided with the floating in the groove of scarf with gap and prevent member clipping the side of guiding at least with the rolling bearing of guide rail in guiding.
As adopt spreadboard of the present invention, can obtain following effect: can make the center line of the mounting center that links two journal bearings that clip guide rail and the intersecting angle of guide rail serve as necessarily, can reduce walking resistance and be expected to reach high speed simultaneously with simple structure.
The specific embodiment
Borrow accompanying drawing that the embodiment of the spreadboard of tablet of the present invention is described.
The present invention is by guide rail guiding, by the outlet side chain wheel drive and get back in the spreadboard of the tablet that ring-type linkage that entrance side sprocket wheel ground constitutes forms, for realizing high speed with simple structure, with the lower end of pitman shaft first rolling bearing is installed at the joint of the connecting plate of the formation folding rule portion of linkage, peripheral part at this bearing is installed with a pair of second rolling bearing, this a pair of second rolling bearing can be rotated around pitman shaft, and the ground, two sides that this a pair of second rolling bearing clips guide rail rolls, the ring-type linkage is led.In addition, be the rotation of middle mind-set certain orientation (for example, left-handed) with pitman shaft usually for suppressing this a pair of second rolling bearing, on the retainer that this a pair of second rolling bearing is installed, be provided with revolution and move restraining device.Thus, the ring-type linkage can be walked at a high speed on the guide rail of the same track width, simultaneously, also can prevent the shake of contingent this a pair of second rolling bearing when the ring-type linkage is walked at a high speed on guide rail.
First embodiment
The following accompanying drawing 1-Fig. 4 that borrows illustrates first embodiment of the invention.
Fig. 1 is the plane as the synchronous twin shaft spreadboard of first embodiment of the invention, and Fig. 2 is the sectional drawing as the isometric linkage 31 of first embodiment, and it constitutes and action as following.
Have in the both sides of tablet 1 a plurality of clamping devices 2 of the end of controlling tablet 1 ring-type linkage 3 (having omitted an one and the ring-type connecting rod of a side of connecting rod among the figure), constitute by a plurality of isometric linkage 31 that forms the folding rule shape.In addition, ring-type linkage 3 is driven by the entrance side sprocket wheel 4 of tablet.And, clamping device 2 is opened and closed and clamps tablet 1, is heated to the temperature that extension needs preheating zone (not shown) by the opening and closing device (not shown) of the switching guide of being located at inlet etc.Ring-type linkage 3, in extension region, direction becomes guide rail 5,6 guiding, the clamping spacing (ピ Star テ) of the configuration of enlarging shape to expand P2 to from P1 gradually by following into, tablet 1 (MD direction and TD direction) on two directions is in length and breadth extended simultaneously, then between the heat-treatment zone with the regulation the temperature heat fixation, chilling between the cooling zone is opened clamping device 2 by the opening and closing device (not shown) of switching guide of being located at outlet etc. and is taken off tablet 1, and tablet 1 former state of taking off is advanced.And then ring-type linkage 3 is driven by outlet side sprocket wheel 7, gets back to entrance side sprocket wheel 4 places.
Promptly, the spreadboard of tablet of the present invention, be provided with the ring-type linkage 3 of a plurality of clamping devices 2 that two side ends at tablet 1 has the end of the tablet 1 of controlling thermoplastic resin, this ring-type linkage 3 is made of a plurality of isometric linkage 31 that forms the folding rule shape, entrance side sprocket wheel 4 by tablet drives, by direct of travel become guide rail 5,6 guiding of enlarging shape configuration, in back that tablet 1 is extended, take off, drive by outlet side sprocket wheel 7 again and get back to entrance side sprocket wheel 4.And chain link 25a, the 25b of the maximum spacing of the isometric linkage 31 of restriction ring-type linkage 3 are located between the adjacent pitman shaft 9.As the bar linkage structure of ring-type linkage 3, can be with reference to the ring-type linkage described in the special fair 5-4896 communique of Japan Patent.
As shown in Figure 2, guiding constitutes a pair of combination of a slabbing thing side and an opposite side with tablet with guide rail 5,6 by the convex member.On sheet side rails 5 near tablet 1 one sides, disposing the joint that links the clamping device 2 control tablet 1 with pitman shaft 8, disposing on the opposing party's anti-sheet side (with the tablet opposition side) guide rail 6 does not have the engaging with pitman shaft 9 of clamping device 2.Pitman shaft 8 is linked by connecting plate 14 and 15 with pitman shaft 9.Linking as first rolling bearing bottom, have the retainer 10,11 of bearing roller 10a, 11a at pitman shaft 8,9, in the both sides of retainer 10,11, promptly at the peripheral part of bearing roller 10a, 11a, flanged pin journal bearing 12 (12a, 12b), 13 (13a, 13b) as a pair of second rolling bearing are installed.Flanged pin journal bearing 12,13 rolls with the two sides of guide rail 5,6 in the guiding of the motion of the isometric linkage 31 of restriction, and is configured to the contact deadweight that keep isometric linkage 31 of guiding with the flange of the top and flanged pin journal bearing 12,13 of guide rail 5,6.
As shown in Figure 3, the state and the state of opening, the intersecting angle θ of connecting plate and guide rail that closes at connecting rod
1, θ
2Different.Flanged pin journal bearing 12 (12a, 12b), 13 (13a, 13b) by retainer 10,11 supportings, change (rotations) relative to the action (rotation) of pitman shaft 8,9, Chang Shiji perpendicular to the ground, two sides of guide rail 5,6 by bearing roller 10a, 11a, promptly, the length direction of relative guide rail 5,6 is orthogonal.Promptly shown in Fig. 4 (a) and (b), even corresponding to the intersecting angle θ of 5,6 on the switching connecting plate 14,15 of folding rule shape connecting rod and guide rail
5, θ
61, θ
62Change, flanged pin journal bearing 12 (12a, 12b), 13 (13a, 13b), action (rotation), normal ground, two sides rotation perpendicular to guide rail by bearing roller 10a, 11a, folding rule shape linkage can be walked at a high speed by the guide rail guiding.
Guiding roughly becomes the sliding-frictional resistance effect with the contact portion of the flange of the top and flanged pin journal bearing 12,13 of guide rail 5,6, and compared with prior art, frictional resistance can be reduced to 1/7 in the author's experiment.
Thereby, as adopt this first embodiment, owing to often can make a pair of flanged pin journal bearing angled to guide rail, make 3 walkings of ring-type linkage with can disobeying the intersecting angle (θ) of connecting plate 14,15 and guide rail 5,6 or guide rail width, owing to the frictional resistance can reduce to walk the time, also can reduce to put on the resistance of pitman shaft, can make and make connecting rod miniaturization, in light weight and help the spreadboard of high speed.
Secondly, in the ring-type linkage 3 that constitutes like this, the variable method of the MD multiplying power between zones of extensibility of Fig. 4 (the side's side (guide rail 5 of fixed clamping device side in this case) in the guide rail 5,6 of fixing a plurality of guiding usefulness, and make the opposing party's side shifting, make the variable travel mechanism of open angle of isometric linkage) is described.
Fig. 4 is that the figure of situation that TD multiplying power (multiplying power of the width of tablet) is 1.0 o'clock a extension is set in expression, and Fig. 4 (a) expression MD multiplying power (multiplying power of the length direction of tablet) is 1.0 state, and Fig. 4 (b) is that expression makes the MD multiplying power than 1 big state.
Move the two sides of using guide rail 6 with a pair of revolving body (gyration cam mechanism) 116a, 116b and 117a, 117b clamping that radius becomes scroll to change, for example shown in Fig. 4 (b), revolving body 116a, 116b keep A-stage, by making revolving body 117a clockwise direction change 180 °, making revolving body 117b counter-clockwise direction change 180 °, move side fixed guide rail 5 one side shiftings in the illustrated right side with guide rail 6, it is big that the connecting rod open angle of linkage becomes.Thus, tablet 1 (for example film) is extended (having omitted clamping device among the figure) at direct of travel.
In addition, the open angle of linkage depends on the angle of revolution of revolving body (gyration cam mechanism) 117a, 117b, can any stepless adjustment.In addition, be freely by making a pair of revolving body 116a, 116b with the horizontal direction of the relative guide rail 6 of relation of 117a, 117b and guide rail 6, all can handle the dislocation of guide rail moving direction and right angle orientation.And, the guide rail by spring steel being applied to not shown part in the drawings and the binding of the guide rail among the figure, guide rail can be configured to ring-type.
Show the method that the direct of travel with tablet 1 relative film extends in the present embodiment, but also can be: revolving body 117a, 117b are fixed, make revolving body 116a turn round, make revolving body 116b to turn round, the open angle of linkage is diminished in illustrated left side to counter-clockwise direction to gyratory directions, thus, the direct of travel of tablet 1 relative film is shunk.In this case, tablet 1 is extended in the TD direction.In addition, the driving method of revolving body 116,117 is not shown, is driven but can be linked to common motor by decelerator; Or link the wide rightabout revolving body 116a of film, 117a, realize revolution synchronously.
By with the combination of the stepless variable technology (technology of enlarging shape arrangement guide rail 5,6) of TD multiplying power, can freely set MD, TD.
Thereby as according to present embodiment, the MD multiplying power can become stepless variable, so the spreadboard of the tablet that is fit to the control of needs fiber regiospecific can be provided.
In the present embodiment, as the mechanism that changes the width between the guide rail 5,6, show the example of the revolving body that uses the gyration cam mechanism, but also be not limited thereto, shown in patent documentation 4, also can on guide rail, process negative thread and be screwed into the axle that is provided with pin thread, axle be rotated and guide rail is moved, but perhaps also image pattern 5 with shown in Figure 6, carry out with tapered member.
As the example that uses tapered member, as Fig. 5 and shown in Figure 6, two sides at the medial surface of facing guide rail 5,6 are being fixed piece 118 (118a, 118b), 119 (119a, 119b) respectively, be provided with movably central block (translation cam mechanism) 120 (120a, 120b) between piece of fixing 118 (118a, 118b) and 119 (119a, 119b), the state that is connected with 3 pieces constitutes.In addition, it is the trapezoid block of minor face that the piece 120 of central portion is made with the tablet entrance side, with axle 121 (121a, 121b), be in line motion state ground links at least, axle 121 can constitute slidably along the direct of travel of tablet with central block (translation cam mechanism) 120.And, axle 121 is slided to the state shown in the figure (b) from scheming the state shown in (a), thus, the guide rail 6 of mobile usefulness can change the MD multiplying power by central block 120 extensions, to fixing guide rail 5 one side shiftings of using.Shown in Fig. 5 (c),, can extend by axle 121 by making central block 120 and piece 118, the combination of 119 one-tenth key shapes.Recorded and narrated a chunk 118~120 in Fig. 5 and example shown in Figure 6, and in fact preferably the piece flock mating more than 2 groups has been placed the inner side surface of guide rail 5,6, each central block 120 links up with 1 axle.
And, be the example that all forms the wedge shape inclined plane on two faces of the face that joins in central block 120a, at the face that joins with piece 118a with piece 119a at example shown in Figure 5.Under this routine situation, when the direct of travel that makes a 121a along tablet slides, a 121a is moved to a fixing side with guide rail 5.But example as shown in Figure 6 is such, in central block 120b, do not forming the inclined plane on the face that joins with piece 118b and on the face that joins with piece 119b, forming the inclined plane, thus, only make a 121b on the tablet direct of travel, slide (rectilinear motion) get final product.
In addition, the driving method of axle 121 (121a, 121b) can be the revolution that makes general motor and drives and to be transformed to rectilinear motion ground and to move.
Second embodiment
The following Fig. 7 that borrows illustrates the second embodiment of the present invention.
Fig. 7 is the sectional drawing as the isometric linkage 31 of second embodiment of the invention, be with the difference of first embodiment, without flanged pin journal bearing 12,13, and not flanged journal bearing 16 of use (16a, 16b) and 17 (17a, 17b), at the spherical bearing 18,19 of the bottom of pitman shaft 8,9 configuration as rolling bearing, spherical bearing 18,19 is leading with rolling above the guide rail 5,6, is supported the weight of isometric linkage by spherical bearing.And can replace spherical bearing 18,19 with roller bearing.
As adopt this second embodiment, owing to except the effect of the desirable embodiment of winning, also can realize rolling friction completely, can further make the linkage weight reduction, can access the spreadboard that helps high speed.
The 3rd embodiment
Following Fig. 8 and Fig. 9 of borrowing illustrates the third embodiment of the present invention.Fig. 8 is the sectional drawing that waits long connecting rod 31 as the third embodiment of the present invention, the difference of itself and first embodiment is, is provided with on retainer 10,11 and suppresses the revolution action limiting device that freely rotate 216,217 of retainer 10,11 relative to the central shaft of pitman shaft 8,9.As revolution action limiting device 216,217, constitute by make turning power give in one direction, limit the revolution action of retainer 10,11 by for example torsion spring etc.
By using the isometric linkage of such formation, can prevent to take place when walking at a high speed jitter phenomenon.That is,, clipping on a pair of journal bearing of guide rail setting how much set out some gaps in order smoothly to walk.Adjust this gap so that when walking at a high speed, do not shake as far as possible.But as shown in Figure 9, at the bend of guiding with guide rail 5 ', 6 ' bending, when linkage is walked action along guiding with guide rail 5 ', 6 ', be supported on the journal bearing 12,13 on the retainer 10,11, because the effect of bearing roller 10a, 11a, often be positioned at the position ground vertical with guide rail and change, final journal bearing 12,13 changes to the equal angle with bend angle θ c.In the angle of this journal bearing changed, under the situation of low speed walking, journal bearing 12,13 slowly made angle change, and under the situation of walking at a high speed, because its angle changes sharply, on journal bearing 12,13 jitter phenomenon takes place, and has reduced the life-span of journal bearing 12,13.That is, owing to journal bearing 12,13 and guiding increase abrasion with guide rail 5 ', 6 ' bump.
In the present embodiment, because revolution action limiting device 216,217 is set on retainer 10,11, even in such guiding with guide rail 5 ', 6 ' bend, because can be with retainer 10,11, to be journal bearing 12,13 push against in guide rail 5 ', 6 ' to certain orientation (be in this case gyratory directions) left, can prevent jitter phenomenon.Can prolong the life-span of journal bearing 12,13 thus.
Certainly, also the revolution action limiting device made from above-mentioned torsion spring etc. 216,217 can be applied to second embodiment shown in Figure 7.
The 4th embodiment
The following accompanying drawing 10 of borrowing illustrates fourth embodiment of the invention.Figure 10 is the part sectional drawing as a pair of rolling bearing portion of the isometric linkage 31 of fourth embodiment of the invention, the difference of itself and first embodiment is, on the two sides of guiding, be provided with groove 51 with guide rail 5,6, discoideus plate 131 is established in bottom at flanged pin journal bearing 12,13, and makes plate 131 enter guiding with being provided with in the groove 51 of guide rail.Here, symbol 132 is screws of fixed head 131, but fixing means is not limited in this.And, between groove 51 and plate 131, be provided with discontiguous gap in common walking.
As complying with the 4th embodiment, except that the effect of the desirable embodiment that wins, when isometric linkage is walked at a high speed, with no matter what reason when having applied the power that makes progress, all can prevent that journal bearing from deviating from from guide rail, so, reliability in the time of can improving high speed can provide the spreadboard that is beneficial to high speed.
And, in the 4th embodiment, be provided with the plate that prevents to float usefulness two sides of a pair of journal bearing, but also can be only in one-sided setting.In addition, here plate is installed with independent part, but also can on journal bearing, be divided into flange, be mounted on retainer from the outside with this journal bearing.
Certainly, the formation of the 4th embodiment also can be applicable to Fig. 7 and second, third embodiment shown in Figure 8.