KR100990213B1 - Sheet type extruder - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention aims to speed up a simple structure in a stretching machine for stretching a sheet-like article using an endless linking device consisting of a plurality of link devices of the same length formed in a fold shape.

An endless linking device having a plurality of gripping devices for holding the ends of the sheet-like material of the thermoplastic resin is provided at both ends of the sheet-like material, and the endless linking device is composed of a plurality of same-length linking devices formed in a fold shape, and the sheet It is driven by the sprocket of the inlet side of the shape, guided by a guide rail arranged in the shape of spreading the end in the advancing direction, draws the sheet-like object, removes the sheet-like object, and is driven by the outlet-side sprocket to return to the inlet sprocket. In the stretching apparatus of the sheet-like structure comprised, a pair of radial bearings are provided in the outer periphery of the bearing provided in the lowest end of the link shaft for the joint of the link plate which forms the fold part of a link apparatus, and the radial bearing moves the link apparatus. The two sides of the guide rail to guide .

Description

Drawing Machine for Sheet Shapes {SHEET TYPE EXTRUDER}

1 is a plan view of a simultaneous biaxial stretching machine according to a first embodiment of the present invention,

2 is a cross-sectional view of a link device of the same length of the stretching machine of FIG. 1 which is a first embodiment of the present invention;

3 is an explanatory view showing the operation of a radial bearing as a first embodiment of the present invention;

4 is an explanatory diagram of a method of varying the MD magnification of the stretching machine of FIG. 1 which is the first embodiment of the present invention;

5 is an explanatory diagram showing another example of a method of varying the MD magnification of the stretching machine of FIG. 1 which is the first embodiment of the present invention;

6 is an explanatory diagram showing still another example of a method of varying the MD magnification of the stretching machine of FIG. 1 which is the first embodiment of the present invention;

7 is a cross-sectional view of a link device of the same length as the second embodiment of the present invention;

8 is a cross-sectional view of a link device of the same length as the third embodiment of the present invention;

9 is an explanatory view showing the action of the torsion spring of the link of the same length of FIG. 8 of the present invention;

10 is a partial cross-sectional view of a rolling bearing part of a link device of the same length as the fourth embodiment of the present invention.                 

※ Explanation of code in main part of drawing

1 sheet-like material 2 holding device

3: endless link device 4: inlet sprocket

5, 6: guide rails for guidance

5 ', 6': guide rails with bends

7: Outlet sprocket 8, 9: Link shaft for joint

10, 11: bearing holder 10a, 11a: bearing roller (bearing)

12, 13: radial bearing with flange 14, 15: link plate

16, 17: radial bearing 18: spherical bearing

31: link device of the same length 51: groove

116, 117: rotating body (rotary cam mechanism)

118, 119: block 120: center block (linear motion cam mechanism)

121: shaft

216, 217: Rotation motion limiting means (eg torsion springs)

131: plate 132: bolt

The present invention relates to an apparatus for stretching a sheet-like article, for example, a thermoplastic resin film.                         

The conventional simultaneous twin-axial stretching machine has a structure in which a linkage is supported by a thrust bearing receiving its own weight and a roller bearing for driving a guide groove as described in Japanese Patent Laid-Open No. 4-12957. there was. In the link apparatus having such a configuration, the sliding resistance on the sliding surface of the thrust receiver is large, making high speed traveling difficult. In addition, since lubricating oil is required in the sliding portion, lubricating oil may scatter on the film and contaminate the film.

As a solution to such a problem, for example, as described in Japanese Patent Application Laid-open No. Hei 11-77825, a thrust receiver is used as an electric rotor. However, in such a two-axis stretching machine, since the guide rails that form the guide grooves for guiding the running of the linking device are fixed on the bed, there is a problem that it cannot be easily performed when the MD (vertical stretching) magnification is changed. have.

In the horizontal drawing machine, as described in Japanese Patent Application Laid-Open No. 62-147520, a guide roller is provided between the guide roller and the guide rail, which are driven by electric power under the weight of the clip, so that the clip moves in the transverse direction. There is an example of a configuration supported by a roller. However, since the rotating shaft is fixed in one direction, the guide rollers (rolling bearings) driven by electric driving under such weight are forced to adopt a mechanically complicated structure in order to move the bent portion along the traveling direction.

As a simultaneous biaxial stretching machine that solves these problems, as described in Japanese Patent Laid-Open No. 2000-334832, a pair of radial bearings for supporting the stretching force of a sheet-like article is provided with a guide rail interposed therebetween. In some cases, the linking device is supported by providing a groove in which the convex portion provided on the guide rail engages with the bearing to simultaneously support the self-weight of the linking device. Moreover, it is possible to restrict the opening angle of the linkage by making one position of the guide rail moveable. According to this system, the radial bearing of the grease sealing system is employed, thereby making the forced oil supply from the outside unnecessary, preventing oil from scattering in advance, and enabling high-speed driving. Also, by moving the guide rail position, the MD magnification can be changed steplessly.

[Patent Document 1]

Japanese Patent Application Laid-Open No. 4-12957

[Patent Document 2]

Japanese Patent Application Laid-Open No. 11-77825

[Patent Document 3]

JP-A 62-147520

[Patent Document 4]

Japanese Patent Application Laid-Open No. 2000-334832

However, in the prior art according to Patent Document 4, the link shaft is fixed to the link on the side where the gripping device of the link constituting the link device is provided, and the other link can rotate with respect to the link shaft. Since the bearing mounting seat is installed at the bottom of the link shaft, and the radial bearing with grooves is installed in the bearing mounting seat, the link shaft and the bearing mounting seat are substantially integrated. The installation seat had a structure that does not rotate.

For this reason, when the link is closed and opened, the crossing angle of the link plate with respect to the guide rail is changed so that the center line connecting the center of the radial bearing with the two grooves installed in the bearing mounting position and the guide rail cross each other. Even when the angle is different, that is, the crossing angle is set to 90 degrees while the link is closed, the crossing angle becomes smaller than 90 degrees when the link is opened. For this reason, in the section where the link is opened, that is, the drawing section of the sheet-like article and the conveying section after the drawing-shaped article is drawn, the width of the guide rail fitted by the radial bearing with grooves must be managed in a narrow dimension along the crossing angle. There is a problem that maintenance of the guide rail is very cumbersome.

An object of the present invention is to provide a stretching machine of a sheet-like article which can achieve high speed with a simple structure to solve the above problems.

Another object of the present invention is to provide a stretching machine of a sheet-like article which has a structure that is simple to solve the above problems, and at the same time achieves high speed and is capable of continuously variable MD magnification.

In order to achieve the above object, the present invention is a sheet-like drawing machine for stretching a sheet-like article by driving an endless link device consisting of a plurality of link devices of the same length formed in a fold shape along the guide rail, link device of the same length Each pair of guide rails installed to adjust the amount of extension corresponding to the inner and outer link shafts of the shaft is formed by a convex member, and both sides of the convex portions of each guide rail are sandwiched by a pair of rolling bearings. The pair of rolling bearings are rotatably supported with respect to the link shaft.

Moreover, in order to achieve the said objective, this invention provides the endless link apparatus provided with the both ends of the sheet-like thing by the holding | gripping tool of several holding | gripping tools which hold | grip the edge part of a sheet-like object, such as a thermoplastic resin, and this endless linkage device was formed in a fold-shaped shape. It consists of a plurality of link devices of the same length, driven by sprockets at the inlet side and outlet side, guided by guide rails arranged in a shape that is sent from the inlet side sprocket and spreads in the advancing direction to extend the sheet-like article. A sheet-shaped drawing machine configured to remove the sheet-like article later and return to the inlet-side sprocket via the outlet-side sprocket, wherein the link shaft is formed at the lowermost end of the link shaft for each joint of the link plate forming the fold of the link device of the same length. It is possible to install a pair of rolling bearings A pair of rolling bearings is arranged so as to be rotatable by inserting an internal guide rail.

In addition, the present invention is a drawing machine of the sheet-like article, a pair of rolling bearing as a radial bearing, having a flange above the outer periphery of each radial bearing, the lower end surface of the flange is the upper surface of the guide rail for guiding And arranged to face each other.

In addition, the present invention is characterized in that, in the drawing machine of the sheet-shaped article, a spherical bearing is arranged at the lower end of each of the link shafts for the joints, and the spherical bearings are configured to transmit the upper surface of each of the guide rails. .

In addition, the present invention provides a stretching device of the sheet-like article, further comprising a moving mechanism for fixing one side of the plurality of guide rails for moving, and moving the other side to vary the opening angle of the link device of the same length. It features.

The present invention also relates to a rotational operation of a bearing holder which is an outer circumferential portion of a bearing having a pair of radial bearings with respect to a link plate adjacent to a bearing provided at a lowermost end of a link shaft for a joint in the sheet-shaped drawing machine. It characterized in that the rotational motion control means for regulating is provided.

In addition, the present invention provides the above sheet-like stretching machine, further comprising a groove provided in the guide rail for guiding, and at least one side of a rolling bearing for fitting the guide rail for guiding therein is provided with an anti-wound member fitted with a gap in the groove. It is characterized by one.

EMBODIMENT OF THE INVENTION The Example of the drawing machine of the sheet-like thing which concerns on this invention is described using drawing.

The present invention is directed to a guide rail, which is driven by an outlet sprocket and is a sheet-shaped article stretching machine by an endless link device configured to return to an inlet side sprocket. A first rolling bearing is provided at the lower end of the link shaft for the plate joint, a pair of second rolling bearings are provided at the outer circumference of the bearing, and the pair of second rolling bearings can be rotated around the link shaft. In addition, a pair of second rolling bearings are fitted on both sides of the guide rail to be electrically driven to guide the endless link device. Further, rotational motion suppressing means is provided in a bearing holder provided with a pair of second rolling bearings such that the pair of second rolling bearings are always suppressed in a constant direction (for example, left turn) about the link axis. This enables high speed running of the endless link device on the guide rail of the same rail width, and chattering of a pair of second rolling bearings that may occur when the endless link device travels on the guide rail at high speed. To prevent.

(Example 1)

A first embodiment of the present invention will be described using Figs.

Fig. 1 is a plan view of a simultaneous biaxial stretching machine as a first embodiment of the present invention, and Fig. 2 is a cross-sectional view of a link device 31 of the same length as the first embodiment, the configuration and operation of which are as follows.

An endless link device 3 having a plurality of gripping apparatuses 2 holding the ends of the sheet-like article 1 on both sides of the sheet-like article 1 (part of the link and one endless link in the drawing (Omitted) is constituted by a plurality of link devices 31 of the same length formed in a fold shape. In addition, the endless link device 3 is driven by the inlet side sprocket 4 of the sheet-like object. The gripping apparatus 2 is opened and closed by an opening and closing means (not shown) such as an opening and closing guide provided at the inlet to hold the sheet-like article 1 and heated to a temperature required for stretching in a preheating section (not shown). In addition, the endless link device 3 is guided to the guide rails 5 and 6 arranged in the extending section in the extending direction, and gradually extends from the grip pitch P1 to P2 so that the sheet-like article 1 is vertically and horizontally two. The drawing apparatus 2 is drawn in the direction (MD direction and TD direction) at the same time, and then heat-set to a predetermined temperature in the heat treatment section, quenching in the cooling section, and by opening and closing means (not shown) such as an opening and closing guide provided at the outlet. ), The sheet-like article 1 is taken out, and the removed sheet-like article 1 proceeds as it is. The endless link device 3 is also configured to be driven by the outlet side sprocket 7 to return to the inlet side sprocket 4.

That is, the stretching device of the sheet-like article according to the present invention includes an endless link device 3 having a plurality of holding devices 2 holding both ends of the sheet-like article 1 of thermoplastic resin at both ends of the sheet-like article 1. The endless link device 3 comprises a plurality of link devices 31 of the same length formed in a fold shape, and is driven by the sprocket 4 at the inlet side of the sheet-like object to spread the end in the advancing direction. It is guided by the guide rails 5 and 6 which are arrange | positioned, the sheet-like object 1 is extended | stretched, the sheet-like object 1 is pulled out, it is driven by the exit side sprocket 7, and it is comprised so that it may return to the inlet side sprocket 4 do. Moreover, the chain links 25a and 25b which limit the maximum pitch of the link apparatus 31 of the same length in the endless link apparatus 3 are provided between the adjacent link shafts 9. As the link structure of the endless link device 3, the endless link device described in Japanese Patent Application Laid-Open No. 5-4896 can be referred to.

The guide rails 5 and 6 for guidance are comprised by convex member as shown in FIG. 2, and consist of a pair set of the sheet-like object side and the half-sheet-like object side. On the sheet-side guide rail 5 close to the sheet-like article 1, a link shaft 8 for a joint to which the holding device 2 for holding the sheet-like article 1 is connected is arranged, and the other half-sheet-side guide is provided. On the rail 6, a link shaft 9 for a joint having no gripper 2 is arranged. The link shaft 8 and the link shaft 9 are connected by the link plates 14 and 15. At the lower end of the link shafts 8 and 9, bearing holders 10 and 11 having bearing rollers 10a and 11a as first rolling bearings are connected, and both sides of the bearing holders 10 and 11, that is, bearing rollers 10a. 11a) is provided with a flanged radial bearing 12 (12a, 12b, 13 (13a, 13b)) which is a pair of second rolling bearings. The radial bearings 12 and 13 with flanges drive both sides of the guide rails 5 and 6 for restricting the movement of the link device 31 of the same length, and the guide rails 5 and 6 for the guide. It is arranged to maintain the weight of the linkage device 31 of the same length by the contact between the upper surface of the flange and the flanges of the radial bearings 12 and 13 with flanges.

As shown in Fig. 3, the intersecting angles θ of the link plate and the guide rail differ between θ1 and θ2 in the closed and open states. Also at this time, the flanged radial bearings 12 (12a, 12b, 13 (13a, 13b) supported by the bearing holders 10, 11) are bearing rollers 10a, 11a for the link shafts 8, 9; By the action of (rotation), it always changes (rotates) to be positioned substantially perpendicular to both sides of the guide rails 5, 6, that is, orthogonal to the longitudinal direction of the guide rails 5, 6. That is, as shown in Figs. 4A and 4B, the crossing angles θ5, θ61, θ62 between the link plates 14, 15 and the guide rails 5, 6 in accordance with the opening and closing of the fold-shaped link. ), The flanged radial bearings 12 (12a, 12b, 13 (13a, 13b)) are always positioned perpendicular to both sides of the guide rail by the action (rotation) of the bearing rollers 10a, 11a. It rotates so that it may be guided by the guide rail with the fold-shaped link apparatus 31, and it becomes possible to drive at high speed.

In addition, the contact surfaces of the upper surfaces of the guide rails 5 and 6 for guides and the flanges of the radial bearings 12 and 13 with flanges are approximately sliding frictional resistance. We confirm that we can reduce.

Therefore, according to the first embodiment, since the pair of flanged radial bearings can be always at a constant angle with respect to the guide rail, the crossing angles of the link plates 14 and 15 and the guide rails 5 and 6 are It is possible to run the endless link device 3 without depending on θ and the width of the guide rail, thereby reducing the frictional resistance during driving and reducing the resistance applied to the link shaft. Light weight can be achieved and it can be set as an extension which is favorable for speed-up.

Next, in the endless link device 3 constituted as described above, according to Fig. 4, one side of the variable magnification method (multiple guide rails 5 and 6 for guiding) is fixed (in this case, A moving mechanism for fixing the guide rail 5 on the holding device side and moving the other side to vary the opening angle of the link device of the same length.

Fig. 4 shows the situation of the stretched portion when the TD magnification (magnification in the width direction of the sheet-like article) is 1.0, (a) shows a state in which the MD magnification (magnification in the longitudinal direction of the sheet-like article) is 1.0, ( b) shows the state which made MD magnification larger than one.

Both side surfaces of the moving guide rail 6 are sandwiched by a pair of rotating bodies (rotational cam mechanisms) 116a, 116b and 117a, 117b whose radius is changed into a vortex, for example, as shown in (b). Similarly, the rotating bodies 116a and 116b maintain the initial state and rotate the rotating body 117a clockwise and the rotating body 117b counterclockwise by 180 degrees, thereby showing the right side of the guide rail 6 for movement. Moves toward the side of the fixed guide rail 5, and the opening angle of the link of the linkage becomes large. As a result, the sheet-like article 1 (for example, a film) is stretched in the advancing direction (the gripping apparatus is omitted in the drawing).

The opening angle of the linkage can be arbitrarily adjusted steplessly depending on the rotation angles of the rotating bodies (rotational motion cam mechanism) 117a, 117b. Furthermore, by freeing the correlation between the pair of rotors 116a, 116b and 117a, 117b with the guide rail 6 in the horizontal direction of the guide rail 6, it is possible to cope with the deviation of the rail moving direction and the perpendicular direction. . In addition, it is possible to arrange the guide rail in an endless shape by using spring steel to connect the guide rail and the guide rail in the drawing not shown.

In addition, in this embodiment, although the sheet-like object 1 was shown to extend | stretch with respect to the advancing direction of a film, the rotating body 116a was fixed to the rotating body 116a by fixing the rotating bodies 117a and 117b, and the rotating body 116b was carried out. It is also possible to shrink the sheet-like article 1 with respect to the advancing direction of the film by rotating a counterclockwise direction and making the opening angle of the linking device small on the left side. In this case, the sheet-like article 1 is stretched in the TD direction. In addition, although the driving method of the rotating bodies 116 and 117 is not shown in figure, it drives by connecting a normal motor through a reducer, and can also be made to synchronize with the rotating bodies 116a and 117a of the anti-film width direction. .

Moreover, MD and TD can be set freely by combining with the stepless variable technique of TD magnification (the technique which arrange | positions the guide rails 5 and 6 in the shape which spread | dispersed the tip).

Therefore, according to this embodiment, endless variable of MD magnification becomes possible, and it becomes possible to provide the extending | stretching machine suitable for the sheet-like thing which requires the orientation control of a fiber.

In addition, although the example which used the rotating body by the rotary motion cam mechanism was shown as a mechanism which changes the width between guide rails 5 and 6 in this embodiment, it is not limited to this, As shown in patent document 4, a guide is shown. The guide rail may be moved by rotating the shaft by twisting the shaft provided with the external thread by machining the female thread on the rail, or may be performed using a wedge-shaped member as shown in FIGS. 5 and 6.

As an example of using a wedge-shaped member, as shown in Figs. 5 and 6, the blocks 118 (118a, 118b) and 119 (119a, 119b) on both sides facing the inner side of the guide rails 5, 6, respectively. ], And the center block (linear motion cam mechanism) 120 (120a, 120b) which is movable between the fixed blocks 118 (118a, 118b) and 119 (119a, 119b) is installed, and 3 blocks are installed. It is configured in a connected state. In addition, the central block 120 is a trapezoidal block having the inlet side of the sheet-shaped object with a short side, and the central block (linear motion cam mechanism) 120 is connected at least linearly with the shaft 121 (121a, 121b). The shaft 121 is configured to be slidable in the advancing direction of the sheet-like article. Then, the guide rail 6 for movement is moved to the center block 120 by sliding the shaft 121 from the state shown in Figs. 5A and 6A to the state shown in Figs. 5B and 6B. It stretches by, and moves to the fixing guide rail 5 side, and MD magnification is changed. The center block 120 and the blocks 118 and 119 can be tensioned by the shaft 121 by engaging in a key shape as shown in Fig. 5C. 5 and 6 illustrate one set of blocks 118 to 120, in practice, at least two or more sets of blocks are disposed on the inner side surfaces of the guide rails 5 and 6, so that each central block 120 is provided. Is preferably connected to one shaft.

5 shows an example in which a wedge-shaped inclined surface is formed on both surfaces of the central block 120a in contact with the block 118a and in contact with the block 119a. In this example, when the shaft 121a is slid in the advancing direction of the sheet-like article, the shaft 121a needs to be moved toward the fixing guide rail 5. However, as shown in FIG. 6, the inclined surface is not formed in the surface which contact | connects the block 118a in the center block 120b, but the inclination surface is formed in the surface which contact | connects the block 119b, and the shaft 121b advances in a sheet-like thing. Just slide in the direction (linear movement).

In addition, the driving method of the shaft 121 (121a, 121b) can be operated by converting rotational drive by a general motor into linear motion.

(Example 2)

Next, a second embodiment of the present invention will be described with reference to FIG.

Fig. 7 is a cross-sectional view of a link device 31 of the same length which is the second embodiment of the present invention, and the difference from the first embodiment is a radial bearing without a flange instead of the flanged radial bearings 12 and 13. [16 (16a, 16b), 17 (17a, 17b)], spherical bearings 18, 19, which are rolling bearings, are disposed at the lower ends of the link shafts 8, 9, and spherical bearings 18, 19) the upper surfaces of the guide rails 5 and 6 are driven so that the weights of the link devices of the same length are supported by spherical bearings. Alternatively, rolling bearings (roller bearings) may be used instead of the spherical bearings 18 and 19.

According to the second embodiment, in addition to the effects of the first embodiment, since complete cloud friction can be realized, the linkage device can be further reduced in weight and can be a stretcher which is advantageous for high speed.

(Example 3)

Next, a third embodiment of the present invention will be described with reference to FIGS. 8 and 9. Fig. 8 is a sectional view of the link 31 of the same length which is the third embodiment of the present invention, and the difference from the first embodiment is that of the bearing holders 10, 11 with respect to the central axis of the link axis 8, 9; The rotational motion control means 216,217 which suppresses free rotation is provided in the bearing holders 10,11. The rotational motion limiting means 216, 217 is configured to restrict the rotational motion of the bearing holders 10, 11 by applying rotational force in one direction, for example, by a torsion spring or the like.

By using the link apparatus of the same length comprised in this way, the chattering phenomenon at the time of high speed driving can be prevented. That is, a pair of radial bearings installed to sandwich the guide rails are provided with some gaps for smooth running thereof. This gap is adjusted as much as possible to prevent chattering at high speeds. However, as shown in FIG. 9, when the linkage travels along the guide rails 5 'and 6' in the bent portion where the guide rails 5 'and 6' are bent, the bearing holder 10, The radial bearings 12 and 13 supported by 11 are changed to always be perpendicular to the guide rail by the action of the bearing rollers 10a and 11a, and finally at an angle equal to the bend angle θc. The radial bearings 12 and 13 are changed. In the change of the angle of the radial bearing, in the case of low speed driving, the radial bearings 12 and 13 gradually change the angle, but in the case of the high speed driving, the angle change is sharp, so that the radial bearing ( The chattering phenomenon occurs in 12 and 13, and the lifetime of the radial bearings 12 and 13 decreases. That is, abrasion increases due to the impact of the radial bearings 12, 13 and the guide rails 5 ', 6'.

In the present embodiment, since the rotational motion restricting means 216, 217 is provided in the bearing holders 10, 11, the bearing holders 10, 11 are also used in the bent portions of the guide rails 5 ', 6'. 11), ie, the radial bearings 12, 13 can be pressed against the guide rails 5 ', 6' in a constant direction, in this case, in a left-rotating direction, so that chattering can be prevented. As a result, the service life of the radial bearings 12 and 13 can be extended.

In addition, it is apparent that the rotational motion restricting means 216, 217 constituted by the torsion spring or the like can also be applied to the second embodiment shown in FIG.

(Example 4)

Next, a fourth embodiment of the present invention will be described with reference to FIG. 1 is a partial cross-sectional view of a pair of rolling bearing portions of a link device 31 of the same length which is the fourth embodiment of the present invention. The difference from the first embodiment is the amount of the guide rails 5 and 6 for the guide. The groove 51 is provided in the side surface, and the disk-shaped plate 131 is provided in the lower part of the radial bearings 12 and 13 with a flange, and the plate 131 enters in the groove 51 of the guide rail for guides. It is installed to go. Here, reference numeral 132 denotes a bolt for fixing the plate 131, but the fixing means is not limited thereto. In addition, a gap is provided between the groove 51 and the plate 131 that does not contact during normal travel.

According to the fourth embodiment, in addition to the effects of the first embodiment, during the high-speed driving of the link apparatus of the same length, the radial bearing can be prevented from deviating from the rail when an upward force is applied for some reason. The reliability at the high speed can be improved, and the stretching machine can be advantageous in speeding up.

In addition, in the fourth embodiment, an anti-injury plate is provided on both sides of the pair of radial bearings, but it may be provided only on one side. In addition, although the plate is provided as another component, the flange may be provided above and below the radial bearing, and the radial bearing may be installed and fixed to the bearing holder from the outside.

In addition, it is clear that the configuration of the fourth embodiment can also be applied to the second and third embodiments shown in FIGS. 7 and 8.

It is applicable to the tenter type film stretching apparatus in general.

According to the drawing machine of the present invention, the structure is simple, and the crossing angle between the center line connecting the installation centers of the two radial bearings fitted with the guide rails and the guide rails can be made constant, and at the same time, the running resistance can be reduced and the speed is increased. There is an effect that can be planned.

Claims (14)

In the drawing apparatus of the sheet-like article which extends a sheet-like thing by driving the endless linking device which consists of a plurality of same-length linkage devices formed in a fold shape along a guide rail, Each of the pair of guide rails provided to adjust the amount of stretching corresponding to the inner and outer link shafts of the link device of the same length is formed of a convex member, and both side surfaces of the convex portions of the respective guide rails are formed. A pair of rolling bearings, wherein the pair of rolling bearings are rotatably supported with respect to the link axis. An endless link device having a plurality of gripping devices for holding end portions of a sheet-like article is provided at both ends of the sheet-shaped article, and the endless link device comprises a plurality of link devices of the same length formed in a fold shape, And a guide guide rail which is driven by the sprocket on the outlet side and is sent from the inlet sprocket to the guide rail arranged in the shape of spreading in the advancing direction to extend the sheet shape, and then removes the sheet shape, and then passes through the outlet sprocket. In the stretching machine of the sheet-like article configured to return to the inlet side sprocket, A pair of rolling bearings rotatably installed with respect to the link shaft are provided at the lowermost end of each link shaft for the joint of the link plate forming the fold portion of the link device of the same length, and the guide rail for the guide can be inserted and rotated. And a pair of rolling bearings arranged so as to stretch the sheet-like article. 3. The method of claim 2, The bearing is provided at the lowermost end of the link shaft for each joint of the link plate forming the fold portion of the link device of the same length, and a pair of rolling bearings is provided at the outer circumference of the bearing. Amazing. 3. The method of claim 2, The pair of rolling bearings are radial bearings, and flanges are provided above the outer circumferences of the radial bearings, and the lower surfaces of the flanges abut the upper surfaces of the guide rails. Drawing machine of sheet form. 3. The method of claim 2, And a spherical bearing is provided at the lower end of each of the link shafts for each joint, and the spherical bearing is placed in contact with an upper surface of each of the guide rails for guiding. 3. The method of claim 2, And a moving mechanism for fixing one of the guide rails on the sheet-like or half-sheet-like side of the guide rail for the guide and moving the other guide rail to vary the opening angle of the link device of the same length. Drawing machine of sheet-like thing made into. 3. The method of claim 2, And a rotational motion control means for regulating the rotational motion of the pair of rolling bearings on the linking shaft provided at the lowermost end of the link shaft for the joint. 3. The method of claim 2, And a groove preventing member is provided in the guide rail for guide, and at least one of the rolling bearings for fitting the guide guide rail is provided with an anti-floating member fitted with a gap in the groove. An endless linking device formed by holding a gripping device for holding an end of a sheet-like object at an inner end and connecting a plurality of link devices of the same length formed in a fold shape on both sides of the sheet-like object, and the sheet-like object in a drawing section. A plurality of guide guide rails are arranged on both sides of the guide rails in a shape in which the ends of the sheet-shaped article are spread in the advancing direction, and the endless link device is driven by the sprockets on the inlet and outlet sides, and the same length in the stretching section. Drawing a sheet-like article configured to guide a linking device to the plurality of guide rails to extend the sheet-like object held by the gripping device, and to return the endless linkage back to the inlet-side sprocket via an outlet-side sprocket. In the phase, A bearing is provided on the lower end of the link shaft for the joint of the link plate forming the fold portion of the link device of the same length so as to be rotatable with respect to the link shaft, and a pair of flanged radial bearings are provided on the outer circumference of the bearing. The flange mounting bottom surface of the pair of flanged radial bearings is arranged so as to face the upper surface of each guide rail for restricting movement of the link device of the same length, and the pair mounting flange radial The bearings are arranged so as to rotate both side surfaces of the guide rail by inserting the guide rails, to fix one side of the plurality of guide rails, and to move the other side to adjust the opening angle of the link device of the same length. An apparatus for stretching a sheet-like article comprising a moving mechanism for varying. An endless linking device formed by holding a gripping device for holding an end of a sheet-like article at an inner end and connecting a plurality of link devices of the same length formed in a fold shape on both sides of the sheet-like article, in the stretching section. A plurality of guide guide rails are arranged on both sides in a shape in which the ends spread in the advancing direction of the sheet-like article, and the endless link device is driven by sprockets on the inlet and outlet sides, and links of the same length in the stretching section. Drawing a sheet-like article which is guided by the guide rails to the plurality of guide rails to extend the sheet-like article held by the gripping device, and then the endless linkage is returned to the inlet-side sprocket via an outlet-side sprocket. In the phase, A bearing is provided at the bottom end of the link shaft for the joint of the link plate forming the fold portion of the link device of the same length so as to be rotatable with respect to the link shaft, and has a pair of radial bearings at the outer circumference of the bearing; A pair of radial bearings are arranged to transmit both sides of each of the guide rails for regulating the movement of the link device of the same length, and at the lower end of the link shaft to face the upper surface of the guide rail. The spherical bearing is arranged, and the spherical bearing is installed so as to be rotatable on the upper surface of each guide rail, the one side of the plurality of guide rails is fixed, and the other side is moved to link devices of the same length. A drawing apparatus for a sheet-shaped article, characterized by comprising a moving mechanism for varying the opening angle of the sheet. The method according to claim 9 or 10, And said moving mechanism is constituted by a rotary motion cam mechanism arranged at least two sets in the advancing direction of said endless link device. The method according to claim 9 or 10, And said moving mechanism is constituted by a linear motion cam mechanism in which at least two sets are arranged in a traveling direction of said endless link device. An endless link device having a plurality of gripping devices for holding the sheet-shaped end portions is provided at both ends of the sheet-shaped material, and the endless link device comprises a plurality of link devices of the same length formed in a fold shape to the inlet side and the outlet side. Driven by sprockets, guided by guide rails arranged in the shape of spreading ends in the advancing direction to extend the sheet-like article, remove the sheet-like article, and return to the inlet-side sprocket via the outlet-side sprocket. In the stretching machine, A pair of radial bearings is provided in a bearing holder rotatably provided by a bearing provided at a lowermost end of a link shaft for a joint of a link plate forming a fold portion of the link device of the same length, and each of the radial bearings has the same length. A rotational motion regulation configured to transmit both side surfaces of the guide rail for guiding the movement of the link device, and to regulate the rotational motion of the bearing holder relative to the link plate adjacent to the bearing provided at the lowermost end of the link shaft for the joint. A stretching apparatus for sheet-like article, comprising means provided. The method of claim 13, And said rotational motion regulating means is a torsion spring which imparts rotational force to said bearing holder from said link plate.

Images