JP7242517B2 - Clip link mechanism of simultaneous biaxial stretching equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sheet/film stretching apparatus for stretching a thin film-like stretching object such as a sheet or a film, and more particularly to a clip link mechanism of a simultaneous biaxial stretching apparatus capable of simultaneous biaxial stretching in the vertical and horizontal directions.

Conventionally, as a simultaneous biaxial stretching device, clips for gripping a thin film-shaped object to be stretched such as a sheet or a film are arranged symmetrically in a plan view on endlessly connected chain links, and the distance between the clips is is gradually expanded by a guide rail to perform lateral stretching in the direction across the rail, and at the same time, longitudinal stretching is performed by expanding and contracting links to widen the distance between clips in the traveling direction of the rail. there is

For example, the sheet/film stretching apparatus described in Patent Document 1 includes a main stem that is a clip carrying member and a pantograph-like link mechanism, and a guide roller that moves along a reference rail on one end side of the main stem. have Also, the other end of the main stem has a pitch setting roller that moves along the pitch setting rail. A lateral magnification is set according to the interval between the opposing reference rails. In addition, the link mechanism is rotatably connected to the same shaft member as the pitch setting roller, and the stretching ratio in the vertical direction (rail traveling direction) is set according to the distance between the reference rail and the pitch setting rail.

JP-A-2008-44339

In Patent Document 1, the settable longitudinal draw ratio is determined by the length of the main link member on which the clip is installed. Therefore, in order to set a large draw ratio in the longitudinal direction, it is necessary to extend the length of the main link member.

However, increasing the length of the main link member requires a corresponding increase in the clip carrier member on which the clip is mounted. As the length of the clip carrying member increases, the distance between the running wheels installed at both ends of the clip carrying member to support the weight of the clip carrying member also increases accordingly. Therefore, as the scale of the sheet/film stretching apparatus increases, the installation area of the apparatus in a factory or the like increases, and there is a problem that the ease of installation of the apparatus is impaired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clip link mechanism for a simultaneous biaxial stretching device capable of securing a necessary longitudinal magnification without increasing the length of a clip carrying member. aim.

In order to solve the above-described problems and achieve the object, the clip link mechanism of the simultaneous biaxial stretching apparatus according to the present invention has a pair of gripping mechanisms that are connected to grip both width direction ends of a stretched object with clips, The object to be stretched is stretched in the width direction and the direction of the movement path by changing the intervals between the opposing and adjacent clips while being moved by rollers guided by a movement path formed by a pair of endless loops. A clip link mechanism for a simultaneous biaxial stretching device, comprising: a first rail defining the interval between adjacent clips; a second rail separated from the first rail by a distance corresponding to the interval; a rail that forms the endless loop, a first roller that is guided by the first rail and moves along the movement path, and the second rail with respect to the first rail a clip holding member provided on the opposite side to the clip installation portion on which the clip is installed; and a first elongated hole extending in a direction intersecting the movement path and penetrating along the direction; a link support member provided with a second roller that is guided by the second rail and moves along the movement path; and a first shaft member provided on the first rail side of the link support member and extending in a direction crossing the moving path to support the link support member. a first shaft member that is rotatably connected to the first shaft member, and the second shaft member closest to the downstream side of the movement path from the first shaft member; The first link member rotatably connected to the link member, the first shaft member, and the second shaft member closest to the upstream side of the movement path from the first shaft member. and a third link member provided parallel to the first shaft member at a position where the first link member is extended from the connection position with the first shaft member. a shaft member; a fourth shaft member provided parallel to the first shaft member at a position extending from a connection position of the second link member with the first shaft member; a third link member rotatably connected to the shaft member; a fourth link member rotatably connected to the fourth shaft member and having the same length as the third link member; a fifth shaft member that is inserted through the first elongated hole and rotatably connected to the third link member and the fourth link member; and a fifth shaft member to which the member provided with and the fourth link member are rotatably connected.

The clip link mechanism of the simultaneous biaxial stretching apparatus according to the present invention has the effect of ensuring the necessary longitudinal magnification without extending the length of the clip carrying member.

1 is an overall schematic diagram of a biaxially stretched film manufacturing apparatus to which the clip link mechanism according to the first embodiment is applied; FIG. FIG. 2 is a side view showing an example of a schematic structure of a clip used in the simultaneous biaxial stretching apparatus according to the first embodiment; FIG. 2 is a top view of the clip link mechanism according to the first embodiment; The side view of the clip link mechanism which concerns on 1st Embodiment. The figure explaining the shape of a 1st link member and a 2nd link member. FIG. 4 is an enlarged view showing a connected state of the first link member and the second link member in the clip carrying member; The side view of the clip link mechanism of the 1st modification of 1st Embodiment. The side view of the clip link mechanism of the 2nd modification of 1st Embodiment. The side view which shows an example of the arrangement structure of the 1st roller in the 2nd modification of 1st Embodiment. The side view of the clip link mechanism of the 3rd modification of 1st Embodiment. The 1st perspective view of the clip link mechanism which concerns on 2nd Embodiment. The 2nd perspective view of the clip link mechanism which concerns on 2nd Embodiment. The top view which shows an example of the state which folded the clip link mechanism which concerns on 2nd Embodiment. The top view which shows an example of the state which opened the clip link mechanism which concerns on 2nd Embodiment to the maximum. The top view and side view of the clip link mechanism which concerns on 3rd Embodiment.

An embodiment of the clip link mechanism of the simultaneous biaxial stretching device according to the present disclosure will be described below in detail based on the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be replaced and easily conceived by those skilled in the art, or those that are substantially the same.

(First embodiment)
[Description of schematic configuration of simultaneous biaxial stretching apparatus]
First, the overall configuration of the simultaneous biaxial stretching apparatus 10 according to the first embodiment will be described with reference to FIG. FIG. 1 is an overall schematic diagram of a simultaneous biaxial stretching apparatus to which a clip link mechanism according to an embodiment is applied.

The simultaneous biaxial stretching apparatus 10 has endless loops 10R and 10L having a large number of clips 20 for gripping the sheet member S symmetrically on both left and right sides in plan view. A sheet-like member S to be stretched is sent from the inlet 1a and discharged from the outlet 1b in a stretched state. A right endless loop 10R and a left endless loop 10L are referred to as the right endless loop and the left endless loop 10L, respectively, when viewed from the entrance 1a side of the sheet/film to be stretched. The sheet member S is, for example, a thermoplastic resin film or the like.

The clips 20 are each attached to one longitudinal end of a rectangular clip carrier member 30 (positions facing each other between the inlet 1a and the outlet 1b). That is, a pair of clips 20 facing each other are arranged at both ends in the width direction of the sheet-like member S, which is an object to be stretched, and function as a gripping device that grips the object to be stretched.

The clip carrying member 30 is guided by the reference rail 100 and circulates in a loop. Note that the reference rail 100 is an example of a first rail in the present disclosure. The right endless loop 10R circulates clockwise, and the left endless loop 10L circulates counterclockwise. Specifically, drive rollers 28 (see FIG. 4) provided on clip carrier members 30 selectively engage drive sprockets 11, 12 to cause each clip carrier member 30 to travel along a circular path. That is, the drive sprockets 11, 12 selectively engage the drive rollers 28 of each clip carrier 30 and are rotationally driven by the electric motor to provide a force that causes each clip carrier 30 to travel along the circuit path. applied to the clip carrier member 30; Specifically, the driving sprocket 12 is driven by the rotational driving force of an electric motor 14 reduced by a speed reducer (not shown). The two driving sprockets 11 are driven by two reduction gears (not shown), which are respectively reduced in opposite directions by rotational driving force of electric motors (not shown).

As the distance between the reference rail 100 of the right endless loop 10R and the reference rail 100 of the left endless loop 10L increases, the sheet-like member S is stretched in the horizontal direction (X-axis direction).

Adjacent clip carrying members 30 are connected by a clip link mechanism 90a composed of a plurality of links. The clip link mechanism 90a is guided by the pitch setting rail 120 and circulates along with the clip carrier member 30 in a loop. Note that the pitch setting rail 120 is an example of a second rail in the present disclosure.

The clip link mechanism 90 a sets the interval between adjacent clip carrying members 30 (hereinafter referred to as clip pitch) according to the interval between the reference rail 100 and the pitch setting rail 120 . As the clip pitch increases, the sheet-like member S is stretched in a direction perpendicular to the width direction, that is, in the vertical direction (Y-axis direction), which is the movement direction of the clip support member 30 . In addition, FIG. 1 shows how the sheet member S sent from the inlet 1a is stretched in the vertical and horizontal directions. In order to make the drawing easier to understand, the sheet-like member S is drawn discontinuously, but in reality the sheet-like member S is continuous from the inlet 1a to the outlet 1b.

The simultaneous biaxial stretching apparatus 10 includes a preheating zone A, a stretching zone B, and a heat treatment zone C extending from the inlet 1a side of the sheet S to the outlet 1b side.

In the preheating zone A, the interval (separation distance) between the reference rail 100 between the left endless loop 10L and the right endless loop 10R is set to correspond to the initial width of lateral stretching, and the left endless loop 10L and the right endless loop 10R are separated over the entire area. arranged parallel to each other. In addition, in the left endless loop 10L and the right endless loop 10R, the interval between the reference rail 100 and the pitch setting rail 120 corresponds to the initial longitudinal stretching pitch.

In the stretching zone B, the distance between the left endless loop 10L and the right endless loop 10R is gradually increased from the preheating zone A toward the heat treatment zone C, and the left endless loop 10L and the right endless loop 10R are arranged non-parallel. be done. The separation distance between the left endless loop 10L and the right endless loop 10R in the stretching zone B is equivalent to the initial width of lateral stretching at the stretching start end (connection end with preheating zone A), and at the stretching end end (connection end with heat treatment zone C). connection end) is set to correspond to the final width of lateral stretching. That is, in the drawing zone B, the distance between the reference rail 100 of the left endless loop 10L and the reference rail 100 of the right endless loop 10R is gradually increased from the preheating zone A side to the heat treatment zone C side. The interval between the reference rails 100 corresponds to the initial width of lateral stretching at the stretching start end (connection end with preheating zone A), and the final width of lateral stretching at the stretching end end (connection end with heat treatment zone C). It has become considerable.

Further, in the drawing zone B, the distance between the reference rail 100 and the pitch setting rail 120 in the left endless loop 10L is gradually reduced from the preheating zone A side to the heat treatment zone C side. Similarly, the interval between the reference rail 100 and the pitch setting rail 120 in the right endless loop 10R is gradually reduced. The interval between the reference rail 100 and the pitch setting rail 120 is equivalent to the initial pitch of longitudinal stretching at the stretching start end (connection end with preheating zone A), and is longitudinal at the stretching end end (connection end with heat treatment zone C). It is equivalent to the final pitch of stretching. That is, in the stretching zone B, the simultaneous biaxial stretching apparatus 10 performs longitudinal stretching and lateral stretching on the sheet-like member S at the same time.

In the heat treatment zone C, the distance between the left endless loop 10L and the right endless loop 10R is set to correspond to the final width of the lateral stretching, and the left endless loop 10L and the right endless loop 10R are arranged parallel to each other over the entire area. The distance between the reference rail 100 and the pitch setting rail 120 is set to correspond to the final pitch of longitudinal stretching, and the reference rail 100 and the pitch setting rail 120 are arranged parallel to each other over the entire area.

[Description of clip structure]
Next, a schematic structure of the clip 20 will be described with reference to FIG. FIG. 2 is a side view showing an example of a schematic structure of a clip used in the simultaneous biaxial stretching apparatus according to the embodiment. A plurality of clips 20 included in the left endless loop 10L and the right endless loop 10R are each attached to one longitudinal end of the clip carrier member 30 . The clip 20 grips the sheet-like member S in a detachable manner. A movable lever 24 is rotatably attached, and an upper movable clip member 26 is attached to the lower end of the movable lever 24 by a pin 25 so as to be swingable. and grip the side edges of the sheet-like member S in a pinching manner. As a result, the clip 20 can sandwich and support the sheet-like member S, and can release the supported state.

[Description of clip link mechanism]
Next, the detailed structure of the clip link mechanism 90a of the simultaneous biaxial stretching apparatus 10 according to this embodiment will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a top view of the clip link mechanism according to the embodiment; FIG. 4 is a side view of the clip link mechanism according to the embodiment;

FIG. 3 shows a clip link mechanism 90a formed by connecting two clip carrying members 30 and one link supporting member 60 with a plurality of links. For ease of explanation, the coordinate system XYZ shown in FIG. 3 is set. 3 also shows a portion of the left endless loop 10L, and the clip 20 is assumed to move in the movement direction D along the Y-axis. That is, the Y-axis negative side in FIG. 3 is the moving direction upstream side, and the Y-axis positive side is the moving direction downstream side. Also, in the following description, the Z-axis positive side is called upward, and the Z-axis negative side is called downward.

The clip link mechanism 90a connects the clip carrying member 30 and the link supporting member 60 which are articulated. When the clip 20 moves in the movement direction D, the clip link mechanism 90a adjusts the distance between the clip support member 30 and the link support member 60 to the distance W between the reference rail 100 and the pitch setting rail 120 (see FIG. 3). ). Further, the clip link mechanism 90a keeps the orientations of the clip support member 30 and the link support member 60 in the direction along the X-axis when the clip 20 moves in the movement direction D. As shown in FIG.

The clip carrying member 30 includes a guide roller 40 , a guide roller 41 , a self-weight receiving roller 42 , a clip setting portion 31 and a first elongated hole 32 .

The guide rollers 40 are, for example, bearings. The guide roller 40 supports the clip carrying member 30 and is rotatably installed around the Z-axis on a first shaft member 43 extending in the Z-axis direction. The guide roller 40 rolls along the clip-side side surface of the reference rail 100 . As shown in FIG. 4, the guide rollers 40 are composed of two rows of rollers of the same size installed on the first shaft member 43 . This stabilizes the clip carrier member 30 by increasing the contact area between the guide roller 40 and the side surface of the reference rail 100 . In addition, the guide roller 40 is an example of the first roller and the first guide roller in the present disclosure.

The guide rollers 41 are, for example, bearings. The guide roller 41 is rotatably installed around the Z-axis on a shaft member 47 extending parallel to the first shaft member 43 that supports the clip carrying member 30 . The guide roller 41 is provided at a position facing the guide roller 40 with the reference rail 100 interposed therebetween. That is, the shaft member 47 that supports the guide roller 41 and the first shaft member 43 that supports the guide roller 40 are installed along the X axis. Then, the guide roller 41 rolls along the side surface of the reference rail 100 opposite to the clip. In addition, the guide roller 41 is an example of the first roller and the second guide roller in the present disclosure.

The self-weight receiving roller 42 is, for example, a bearing. As shown in FIG. 4, the self-weight receiving roller 42 contacts the top surface 100a of the reference rail 100 along the reference rail 100. As shown in FIG. The self-weight receiving roller 42 supports the self-weight of the clip carrying member 30 and rolls while being guided by the reference rail 100 . The self-weight receiving roller 42 is an example of the first roller and the first self-weight receiving roller in the present disclosure.

The clip 20 described above is installed in the clip installation portion 31 . The clip mounting portion 31 is provided on the side of the clip carrying member 30 opposite to the pitch setting rail 120 (second rail) with respect to the reference rail 100 (first rail).

The first slot 32 is formed to extend in a direction that intersects the direction of movement D and pass through the clip carrier member 30 along that direction. The action of the first elongated holes 32 will be described later.

The link support member 60 includes a guide roller 50 , a guide roller 51 , a self-weight receiving roller 52 and a second long hole 62 .

The guide rollers 50 are, for example, bearings. The guide roller 50 supports the link support member 60 and is installed rotatably around the Z-axis on a second shaft member 53 extending in the Z-axis direction. The guide roller 50 rolls along the side surface of the pitch setting rail 120 opposite to the clip. As shown in FIG. 4, the guide rollers 50 are composed of two rows of rollers of the same size installed on the second shaft member 53 . This stabilizes the link support member 60 by increasing the contact area between the guide roller 50 and the side surface of the pitch setting rail 120 . In addition, the guide roller 50 is an example of the second roller and the third guide roller in the present disclosure.

The guide rollers 51 are, for example, bearings. The guide roller 51 is installed rotatably around the Z-axis on a shaft member 48 extending parallel to the second shaft member 53 that supports the link support member 60 . The guide roller 51 is provided at a position facing the guide roller 50 with the pitch setting rail 120 interposed therebetween. That is, the shaft member 48 that supports the guide roller 51 and the second shaft member 53 that supports the guide roller 50 are installed along the X axis. Then, the guide roller 51 rolls along the clip-side side surface of the pitch setting rail 120 . In addition, the guide roller 51 is an example of the second roller and the fourth guide roller in the present disclosure.

The self-weight receiving roller 52 is, for example, a bearing. As shown in FIG. 4, the self-weight receiving roller 52 contacts the top surface 120a of the pitch setting rail 120 along the pitch setting rail 120. As shown in FIG. The self-weight receiving roller 52 supports the self-weight of the link support member 60 and rolls while being guided by the pitch setting rail 120 . The self-weight receiving roller 52 is an example of the second roller and the second self-weight receiving roller in the present disclosure.

The second elongated hole 62 is formed to extend in a direction intersecting the movement direction D and penetrate the link support member 60 along the direction. The action of the second elongated holes 62 will be described later.

[Description of Clip Link Mechanism for Supporting Clip Supporting Member]
Next, the configuration of the link member that connects the clip support member 30 and the link support member 60 will be described.

One end of the first link member 70 and one end of the second link member 71 are rotatably connected to the first shaft member 43 provided on the clip support member 30 . Furthermore, the first link member 70 has a third shaft member parallel to the first shaft member 43 at a position extending from the position where the first link member 70 is connected to the first shaft member 43 . 44 are provided. Further, the second link member 71 has a fourth shaft member parallel to the first shaft member 43 at a position extending from the position where the second link member 71 is connected to the first shaft member 43 . 45 are provided.

One end of the third link member 72 is rotatably connected to the third shaft member 44 . One end of a fourth link member 73 having the same length as the third link member 72 is rotatably connected to the fourth shaft member 45 .

The other end side of the first link member 70 is rotatably connected to the second shaft member 53 included in the link support member 60 closest to the downstream side in the moving direction D from the first shaft member 43 .

The second link member 71 has the same length as the first link member 70 . The other end side of the second link member 71 is rotatably connected to the second shaft member 53 included in the link support member 60 closest to the upstream side in the moving direction D from the first shaft member 43. .

The other end side of the third link member 72 and the other end side of the fourth link member 73 are rotatably connected to the fifth shaft member 46 inserted through the first long hole 32 .

That is, the first link member 70, the second link member 71, the third link member 72, and the fourth link member 73 are connected to the first shaft member 43 and the third shaft member 44. , and a fourth shaft member 45 and a fifth shaft member 46 to form a pantograph-like link mechanism.

[Explanation of Clip Link Mechanism Supporting Link Support Member]
One end side of the first link member 70 and one end side of the second link member 71 are rotatably connected to the second shaft member 53 provided on the link support member 60 . Further, the first link member 70 has a sixth shaft member parallel to the second shaft member 53 at a position extending from the position where the first link member 70 is connected to the second shaft member 53. 54 is provided. Further, the second link member 71 has a seventh shaft member parallel to the second shaft member 53 at a position extending from a position where the second link member 71 is connected to the second shaft member 53 . 55 are provided.

One end of the fifth link member 74 is rotatably connected to the sixth shaft member 54 . One end of a sixth link member 75 having the same length as the fifth link member 74 is rotatably connected to the seventh shaft member 55 .

The other end side of the first link member 70 is rotatably connected to the first shaft member 43 of the clip support member 30 closest to the upstream side in the moving direction D from the second shaft member 53 . The other end side of the second link member 71 is rotatably connected to the first shaft member 43 included in the clip support member 30 closest to the downstream side in the movement direction D from the second shaft member 53. .

The other end side of the fifth link member 74 and the other end side of the sixth link member 75 are rotatably connected to the eighth shaft member 56 inserted through the second long hole 62 .

That is, the first link member 70, the second link member 71, the fifth link member 74, and the sixth link member 75 are connected to the second shaft member 53 and the sixth shaft member 54. , and a seventh shaft member 55 and an eighth shaft member 56 to form a pantograph-like link mechanism.

Since the simultaneous biaxial stretching device 10 has such a clip link mechanism 90a, the first link member 70 and the second link member 70 can be connected according to the change in the distance W between the reference rail 100 and the pitch setting rail 120. 71 is changed. That is, as the distance W between the reference rail 100 and the pitch setting rail 120 increases, the opening angle θ decreases. Then, the interval (clip pitch) between adjacent clips 20 becomes smaller. On the other hand, as the distance W between the reference rail 100 and the pitch setting rail 120 decreases, the opening angle θ increases. Then, the interval (clip pitch) between adjacent clips 20 increases.

When the opening angle θ changes, the first link member 70 , the second link member 71 , the third link member 72 , and the fourth link member 73 are connected to the first long hole 32 It transforms into a pantograph shape along the At that time, the bisector of the opening angle θ between the first link member 70 and the second link member 71 coincides with the direction in which the first elongated hole 32 extends. Since the first long hole 32 extends in the direction intersecting the moving direction D, the orientation of the clip support member 30 is always held in the direction intersecting the moving direction D regardless of the change in the opening angle θ. . Therefore, the orientation of the clip 20 installed on the clip carrier 30 remains constant regardless of the change in the distance W between the reference rail 100 and the pitch setting rail 120 .

Also, when the opening angle θ changes, the first link member 70 , the second link member 71 , the fifth link member 74 , and the sixth link member 75 are connected to the second elongated hole 62 . It transforms into a pantograph shape along the At that time, the bisector of the opening angle .theta. Since the second long hole 62 extends in a direction intersecting the moving direction D, the orientation of the link support member 60 is always held in the direction intersecting the moving direction D regardless of the change in the opening angle θ. .

[Description of Shapes of First Link Member and Second Link Member]
Next, shapes of the first link member 70 and the second link member 71 will be described with reference to FIGS. 5 and 6. FIG. FIG. 5 is a diagram for explaining the shapes of the first link member and the second link member. FIG. 6 is an enlarged view showing the connected state of the first link member and the second link member in the clip carrying member.

First, the shape of the first link member 70 will be described with reference to FIG. A connection hole 70a and a connection hole 70b are formed at positions that define the link length L1 of the first link member 70. As shown in FIG. The first shaft member 43 is installed in the connection hole 70a. Also, the second shaft member 53 is installed in the connection hole 70b.

A connection hole 70c is formed at a position separated by a distance d from a straight line connecting the connection holes 70a and 70b. A connection hole 70d is formed at a position separated by a distance d in the opposite direction to the distance d from the straight line connecting the connection holes 70a and 70b. The third shaft member 44 is installed in the connection hole 70c. Also, the sixth shaft member 54 is installed in the connection hole 70d.

As shown in FIG. 5, the second link member 71 has a shape that is inverted from that of the first link member 70 . The second link member 71 has connection holes 71a, 71b, 71c and 71d corresponding to the connection holes 70a, 70b, 70c and 70d of the first link member 70, respectively.

The connection holes 71c and 71d are opened in opposite directions from the straight line connecting the connection holes 71a and 71b at positions separated by a distance d.

Next, a state in which the first link member 70 and the second link member 71 are rotatably connected by the first shaft member 43 in the clip support member 30 will be described with reference to FIG.

As described above, since the connection hole 70c is located at a distance d from the connection hole 70a, the link length L2 of the third link member 72 connected to the connection hole 70c is set to , When the distance d is 0, that is, the connection hole 70c is placed on the straight line connecting the connection hole 70a and the connection hole 70b in the first link member 70 (the installation position of the first shaft member 43 and the second axis A longer length can be set compared to the case where it is provided on a straight line connecting the installation position of the member 53 . Similarly, when the distance d is 0, the link length L2 of the fourth link member 73 connected to the connection hole 71c is equal to the connection hole 71a and the connection hole 71b in the second link member 71. (on the straight line connecting the installation position of the first shaft member 43 and the installation position of the second shaft member 53). As a result, a wider movable range of the fifth shaft member 46 can be ensured, so a wider variable range of the opening angle θ between the first link member 70 and the second link member 71 can be ensured. can. That is, it is possible to set a larger clip pitch change range.

In the link support member 60, when the first link member 70 and the second link member 71 are rotatably connected by the second shaft member 53, a link structure similar to that described above is used. A similar effect can be obtained.

[Description of the lifting prevention function of the clip link mechanism]
The simultaneous biaxial stretching device 10 has a lifting prevention mechanism that prevents the clip link mechanism 90a from lifting while the clip 20 is moving.

That is, as shown in FIG. 4, the clip carrier member 30 is provided with a guide roller 80 rotatably mounted on the clip side about an axis along the X axis. The upper edge of the guide roller 80 is prevented from moving upward by a plate member 81 installed on the upper end of the base 110 on which the reference rail 100 is formed. It should be noted that the plate member 81 is an example of a lifting prevention member in the present disclosure.

In addition, as shown in FIG. 4, the link support member 60 has a guide roller 82 installed on the side opposite to the clip so as to be rotatable about an axis along the X axis. The upper edge of the guide roller 82 is prevented from moving upward by a plate member 83 installed on the base 110 on which the pitch setting rail 120 is formed. It should be noted that the plate member 83 is an example of a lifting prevention member in the present disclosure.

In this manner, the plate-like members 81 and 83 are arranged to move the guide rollers 80 and 82 even when an upward force (a force directed toward the Z-axis positive side) acts on the moving clip link mechanism 90a. By blocking the lifting, the clip link mechanism 90a is prevented from lifting.

As described above, the clip link mechanism 90a of the simultaneous biaxial stretching apparatus 10 includes the guide rollers 40 and 41 (first rollers) guided by the reference rail 100 (first rail) and the self-weight receiving roller 42 (first rail). 1 roller) and a clip 20 mounted on a clip mounting portion 31 and moving in the direction of movement D along the movement path; ) guided by the guide rollers 50 and 51 (second rollers) and the self-weight receiving roller 52 (second roller), the first link member 70 and the first link A second link member 71 having the same length as the member 70 is alternately connected. The first link member 70 and the second link member 71 are rotatably connected to the first shaft member 43 installed in the clip carrier member 30 in a direction crossing the moving direction D. As shown in FIG. A third shaft member 44 is installed parallel to the first shaft member 43 at a position where the first link member 70 is extended from the connection position with the first shaft member 43, and the third shaft member 44 is rotatably connected to the third shaft member 44. One end side of the link member 72 is connected. Further, a fourth shaft member 45 is installed parallel to the first shaft member 43 at a position where the second link member 71 is extended from the connection position with the first shaft member 43 so as to be rotatable. One end side of the link member 73 is connected. Further, the other end side of the third link member 72 and the other end side of the fourth link member 73 are connected by a first elongated hole formed in the clip support member 30 and penetrating in a direction intersecting with the moving direction D. It is rotatably connected to a fifth shaft member 46 that passes through 32 . Also, the first link member 70 and the second link member 71 are rotatably connected to the second shaft member 53 installed on the link support member 60 . The clip link mechanism 90a grips the ends of the sheet-like member S (object to be stretched) in the width direction with the clips 20, and divides the interval between the connected clips 20 in the vertical direction along the moving direction D and in the moving direction D and the transverse direction that intersects with the Therefore, the clip link mechanism 90a can ensure a required longitudinal magnification with the clip support member 30 having a short length. In addition, the clip link mechanism 90a can hold the direction of the connected clip 20 in the direction orthogonal to the movement direction D regardless of the draw ratio of the sheet-like member S in the longitudinal direction and the lateral direction. Furthermore, since the direction of the clip carrying member 30 is kept constant, it is possible to reduce resistance when moving the clip link mechanism 90a. In addition, since the length of the clip carrying member 30 can be shortened, the distance W between the reference rail 100 and the pitch setting rail 120 can be narrowed, thereby miniaturizing the simultaneous biaxial stretching device 10. be able to.

Further, in the clip link mechanism 90a of the simultaneous biaxial stretching device 10, the third shaft member 44 and the fourth shaft member 45 connect the first link member 70 and the second link member 71 to the first shaft member. 43, the third shaft member 44 is offset upstream in the movement direction D from a straight line connecting the installation position of the first shaft member 43 and the installation position of the second shaft member 53. The fourth shaft member 45 is provided at a position offset downstream in the movement direction D from a straight line connecting the installation position of the first shaft member 43 and the installation position of the second shaft member 53. be done. Therefore, the link length L2 of the third link member 72 and the fourth link member 73 can be designed longer. As a result, a wider variable range of the opening angle .theta.

In addition, the clip link mechanism 90a of the simultaneous biaxial stretching device 10 is provided coaxially with the first shaft member 43, and is guided by the reference rail 100 (first rail). a guide roller 41 (second guide roller) provided at a position facing the guide roller 40 with the reference rail 100 therebetween and guided by the reference rail 100; , and a self-weight receiving roller 42 (first self-weight receiving roller) that abuts along the movement direction D and moves while supporting the self-weight of the clip carrying member 30 . Therefore, the clip link mechanism 90a can be smoothly moved along the reference rail 100. As shown in FIG.

Furthermore, the clip link mechanism 90a of the simultaneous biaxial stretching device 10 has a second link member 70 installed parallel to the second shaft member 53 at a position where the first link member 70 is extended from the connection position with the second shaft member 53. One end side of a fifth link member 74 is rotatably connected to the shaft member 54 of No. 6 . A sixth shaft member 55 is rotatably attached to a seventh shaft member 55 installed parallel to the second shaft member 53 at a position where the second link member 71 is extended from the connection position with the second shaft member 53 . One end side of the link member 75 is connected. Furthermore, the other end side of the fifth link member 74 and the other end side of the sixth link member 75 are connected to each other by a second long hole formed in the link support member 60 and penetrating in a direction intersecting with the moving direction D. It is rotatably connected to the eighth shaft member 56 passing through 62 . Therefore, the direction of the connecting link support members 60 can be maintained in the direction perpendicular to the movement direction D while the length of the link support members 60 is short. Therefore, the size of the link support member 60 can be designed to be compact. Further, since the direction of the link support member 60 is kept constant, it is possible to reduce the resistance when moving the clip link mechanism 90a.

In the clip link mechanism 90a of the simultaneous biaxial stretching device 10, the sixth shaft member 54 and the seventh shaft member 55 connect the first link member 70 and the second link member 71 to the second shaft member. 53, the sixth shaft member 54 is offset downstream in the movement direction D from a straight line connecting the installation position of the first shaft member 43 and the installation position of the second shaft member 53. The seventh shaft member 55 is provided at a position offset upstream in the movement direction D from a straight line connecting the installation position of the first shaft member 43 and the installation position of the second shaft member 53. be done. Therefore, the link length L2 of the fifth link member 74 and the sixth link member 75 can be designed longer. As a result, a wider variable range of the opening angle .theta.

In addition, the clip link mechanism 90a of the simultaneous biaxial stretching device 10 is provided coaxially with the second shaft member 53, and is guided by the pitch setting rail 120 (second rail). a guide roller 51 (fourth guide roller) provided at a position facing the guide roller 50 with the pitch setting rail 120 therebetween and guided by the pitch setting rail 120; A self-weight receiving roller 52 (second self-weight receiving roller) that contacts the top surface 120a along the moving direction D and moves while supporting the self-weight of the link support member 60 is provided. The clip link mechanism 90 a can be smoothly moved along the pitch setting rail 120 .

The clip link mechanism 90a of the simultaneous biaxial stretching device 10 further includes plate-like members 81 and 83 (lift prevention members) that prevent the clip link mechanism 90a from lifting when the clip link mechanism 90a moves. . Therefore, the clip link mechanism 90a can be moved more smoothly.

[First Modification of First Embodiment]
Next, a first modification of the first embodiment will be described with reference to FIG. FIG. 7 is a side view of the clip link mechanism of the 1st modification of 1st Embodiment.

The clip link mechanism 90b shown in FIG. 7 has wall-like members 101 and 121 and a plate-like member 84 instead of the guide rollers 80 and 82 and the plate-like members 81 and 83 in the clip link mechanism 90a (see FIG. 4). , 85.

The wall member 101 is installed parallel to the reference rail 100 . Then, the guide roller 40 rolls in the space between the reference rail 100 and the wall member 101 along the movement direction D (see FIG. 3).

The plate-like member 84 is installed at the upper end of the wall-like member 101 at a position that prevents the guide roller 40 from rising from the base 110 . Specifically, as shown in FIG. 7, the plate-like member 84 is installed at a position where it contacts the upper edge of the guide roller 40 when the guide roller 40 is lifted upward. It should be noted that the plate member 84 is an example of a lifting prevention member in the present disclosure.

Also, the wall member 121 is installed parallel to the pitch setting rail 120 . Then, the guide roller 50 rolls in the space between the pitch setting rail 120 and the wall member 121 along the movement direction D (see FIG. 3).

The plate-like member 85 is installed at the upper end of the wall-like member 121 at a position that prevents the guide roller 50 from rising from the base 110 . Specifically, as shown in FIG. 7, the plate-like member 85 is installed at a position where it contacts the upper edge of the guide roller 50 when the guide roller 50 is lifted upward. It should be noted that the plate member 84 is an example of a lifting prevention member in the present disclosure.

With such a configuration, the plate-like member 84 prevents the guide roller 40 from lifting even when the clip link mechanism 90b receives a force in the upward lifting direction during movement. Also, the plate member 85 prevents the guide roller 50 from rising. Therefore, the clip link mechanism 90b can be moved smoothly.

[Second Modification of First Embodiment]
Next, a second modification of the first embodiment will be described with reference to FIGS. 8 and 9. FIG. FIG. 8 is a side view of a clip link mechanism of a second modification of the first embodiment; FIG. 9 is a side view showing an example of the arrangement structure of the first rollers in the second modification of the first embodiment.

A clip link mechanism 90c shown in FIG. 8 includes a plate-like member 86 instead of the guide rollers 80, 82 and the plate-like members 81, 83 of the clip link mechanism 90a (see FIG. 4). Further, instead of the guide roller 40, a guide roller 87 having a larger diameter than the guide roller 40 is provided. Further, instead of the guide roller 50, a guide roller 88 having a larger diameter than the guide roller 50 is provided.

The plate-like member 86 is installed at the upper end of the base 110 and prevents the self-weight receiving roller 42 from floating upward (positive side of the Z axis). It should be noted that the plate member 86 is an example of a lifting prevention member in the present disclosure.

The guide rollers 87 are single-row rollers arranged in a zigzag manner between the adjacent clip carrying members 30 so that the heights of the guide rollers 87 are staggered. Further, the guide rollers 88 are single-row rollers arranged in a staggered manner between the adjacent link support members 60 so that the installed heights are alternately different. The guide roller 87 is an example of a first roller and a first guide roller in the present disclosure. Also, the guide roller 88 is an example of a second roller and a third guide roller in the present disclosure.

If the roller diameter g is increased while the adjacent guide rollers 87 are installed at the same height, the adjacent guide rollers 87 interfere with each other when the clip pitch is reduced. Therefore, as shown in FIG. 9, by staggering the installation heights of the adjacent guide rollers 87, it is possible to prevent the guide rollers 87 from interfering when the clip pitch is reduced.

When the adjacent clip carrying members 30 are moved to the closest position, that is, when they are in the minimum clip pitch state, the outer periphery of the guide roller 87 is positioned below the adjacent clip carrying members 30 as shown in FIG. enter. Therefore, the roller diameter g of the guide roller 87 can be set larger than the minimum clip pitch p. As a result, when the clip link mechanism 90c changes the clip pitch, the stability when the reference rail 100 restrains the position of the clip carrier member 30 can be improved. Although not shown, the guide roller 88 installed on the link support member 60 also has the same structure as in FIG.

It should be noted that the guide rollers 41 installed at positions facing the guide rollers 87 may have a large diameter and be staggered in the same manner as the guide rollers 87 .

Also, although not described, the guide rollers 88 that guide the movement of the link support member 60 also have a zigzag arrangement structure similar to that of the guide rollers 87 . Then, the guide rollers 51 installed at positions facing the guide rollers 88 may have a large diameter and be arranged in a zigzag arrangement like the guide rollers 88 .

As described above, in the clip link mechanism 90c, the guide rollers 87 (first guide rollers) provided on the adjacent clip carrying members 30 are arranged in a staggered manner so that the rollers of the guide rollers 87 The diameter g (diameter) is larger than the minimum clip pitch p of the clip link mechanism 90c. Therefore, when the clip link mechanism 90c changes the clip pitch, the stability when the reference rail 100 constrains the position of the clip carrying member 30 can be improved.

Further, in the clip link mechanism 90c, the guide rollers 88 (first rollers) provided on the adjacent link support members 60 are arranged in a staggered manner so that the roller diameter g (diameter) of the guide rollers 88 is is larger than the minimum clip pitch p of the clip link mechanism 90c. Therefore, when the clip link mechanism 90c changes the clip pitch, the stability when the pitch setting rail 120 constrains the position of the link support member 60 can be improved.

[Third Modification of First Embodiment]
Next, a third modification of the first embodiment will be described with reference to FIG. FIG. 10 is a side view of a clip link mechanism of a third modification of the first embodiment;

A clip link mechanism 90d shown in FIG. 10 includes guide rollers 80, 82 and plate-like members 81, 83 provided in a clip link mechanism 90a (see FIG. 4) and staggered arrangement provided in a clip link mechanism 90c (see FIG. 8). Guide rollers 87, 88 are provided. That is, the clip link mechanism 90d is prevented from being lifted by the guide rollers 80, 82 and the plate members 81, 83, and the clip link mechanism 90d is adjusted to the clip pitch by the staggered guide rollers 87, 88. This improves the stability of the clip carrier member 30 and link support member 60 when changing .

7 and 8 and the staggered arrangement structure of the guide rollers shown in FIG. 8 can be appropriately combined. In addition to the structure shown in FIG. 10, it is possible to prevent the guide roller from floating and to achieve stable running.

(Second embodiment)
Next, the clip link mechanism 90e of the simultaneous biaxial stretching apparatus 10 which is 2nd Embodiment is demonstrated using FIGS. 11-14. FIG. 11 is a first perspective view of a clip link mechanism according to the second embodiment; FIG. 12 is a second perspective view of the clip link mechanism according to the second embodiment; FIG. 13 is a top view showing an example of a folded state of the clip link mechanism according to the second embodiment. FIG. 14 is a top view showing an example of the clip link mechanism in the most opened state according to the second embodiment.

A clip link mechanism 90e shown in FIGS. 11 and 12 has a structure in which a seventh link member 76 is added to the clip link mechanism 90a described in the first embodiment. The seventh link member 76 is rotatably connected to a ninth shaft member 77 that extends in the Z-axis direction and has one end attached to the first link member 70 . A third elongated hole 79 is formed in the seventh link member 76 , and a tenth connecting member provided in the second link member 71 and extending in the Z-axis direction is provided in the third elongated hole 79 . of the shaft member 78 is inserted. The installation position of the seventh link member 76, that is, the installation positions of the ninth shaft member 77 and the tenth shaft member 78 will be described later.

The seventh link member 76 sets the opening angle θ between the first link member 70 and the second link member 71 to a range in which the tenth shaft member 78 slides between both ends of the third long hole 79. Restrict. In other words, the first link member 70 is in a state where the tenth shaft member 78 is slid to the far end of the third slot 79 from the ninth shaft member 77 . and the second link member 71 is maximized. The opening angle θ at this time is an example of the predetermined angle in the present disclosure.

When the seventh link member 76 limits the opening angle θ between the first link member 70 and the second link member 71 to the maximum value, the first link member 70 and the second link member 71 that are connected to each other In addition, it is assumed that a pulling force that pulls the clip link mechanism 90e in the movement direction D acts. At this time, the seventh link member 76 prevents the first link member 70 and the second link member 71, which are connected to each other, from increasing the opening angle θ. The link member 71 behaves as a single rigid body against a tensile force pulling in the moving direction D. As shown in FIG. This improves the stability when the clip link mechanism 90e moves.

Further, when the seventh link member 76 is not installed, that is, when the upper limit is not set for the opening angle θ between the first link member 70 and the second link member 71, the opening angle θ is changed to 180°, for example. In this case, since the first link member 70 and the second link member 71 form a straight line, the closing direction cannot be uniquely determined when closing the opening angle θ. Therefore, the opening angle θ is limited to less than θ=180° by the seventh link member 76 so that the clip link mechanism 90e can be reliably opened and closed regardless of the opening angle θ.

In the clip link mechanism 90e, the links that connect the clip support member 30 and the link support member 60 are the second link member 71, the seventh link member 76, and the first link in order from above (positive side of the Z axis). The members 70 are connected in order. When the first link member 70 and the second link member 71 are closed and the minimum clip pitch is set, the tenth shaft member 78 is inserted into the third elongated hole 79 by the ninth shaft member 77. (See FIG. 12). At this time, the clip link mechanism 90e is in a state in which the seventh link member 76 enters the back side of the second link member 71, as shown in FIG. That is, even when the seventh link member 76 is installed, the minimum value of the clip pitch can be the same as when the seventh link member 76 is not installed.

Conversely, when the first link member 70 and the second link member 71 are opened and the maximum clip pitch is set, the tenth shaft member 78 is positioned in the third elongated hole 79 as the ninth shaft member. Slide away from 77. At this time, the clip link mechanism 90e is in the state shown in FIG.

Next, the installation position of the seventh link member 76, that is, the installation positions of the ninth shaft member 77 and the tenth shaft member 78 will be described with reference to FIG. The distance between the first shaft member 43 and the ninth shaft member 77 is defined as e1, and the distance between the first shaft member 43 and the tenth shaft member 78 is defined as e2. In the clip link mechanism 90e, the ninth shaft member 77 and the tenth shaft member 78 are installed such that e1<e2. As a result, when changing the opening angle θ between the first link member 70 and the second link member 71, particularly when changing the opening angle θ from the maximum clip pitch to a smaller value, the tenth shaft member 78 can be slid along the third elongated hole 79 with a smaller force, so the opening angle θ can be easily reduced.

As described above, the seventh link member 76 is connected between the first link member 70 and the second link member 71 in the clip link mechanism 90e. The seventh link member 76 limits the opening angle θ between the first link member 70 and the second link member 71 to a predetermined angle or less. In a state in which the opening angle θ is limited to a predetermined angle, the clip link mechanism 90e behaves as a single rigid body against a tensile force that pulls the clip link mechanism 90e in the moving direction D. Stability when moving can be improved.

(Third embodiment)
Next, the clip link mechanism 90f of the simultaneous biaxial stretching apparatus 10 of the third embodiment will be described with reference to FIG. 15A and 15B are a top view and a side view of the clip link mechanism according to the third embodiment.

The clip link mechanism 90f has a structure in which the clip support member 30 is divided into a travel unit 97 and a link connection unit 93. As shown in FIG. The traveling unit 97 and the link connection unit 93 are installed on the first shaft member 43 so as to be rotatable about the Z axis. The clip link mechanism 90f has a structure in which the link support member 60 is divided into a travel unit 99 and a link connection unit 98. As shown in FIG. The travel unit 99 and the link connection unit 98 are installed on the second shaft member 53 so as to be rotatable about the Z axis.

The traveling unit 97 includes guide rollers 40 and 41 and self-weight receiving rollers 94 . The guide rollers 40 and 41 and the self-weight receiving roller 94 are an example of the first roller in the present disclosure.

The guide rollers 40 are, for example, bearings. The guide roller 40 is installed below the traveling unit 97 so as to be rotatable around the Z axis. The guide roller 40 rolls along the clip-side side surface of the reference rail 100 .

The guide rollers 41 are, for example, bearings. The guide roller 41 is installed below the traveling unit 97 so as to be rotatable around the Z axis while facing the guide roller 40 . The guide roller 41 rolls along the side surface of the reference rail 100 opposite to the clip.

The self-weight receiving roller 94 is, for example, a bearing. The self-weight receiving roller 94 contacts the top surface 100 a of the reference rail 100 along the reference rail 100 . The self-weight receiving roller 94 supports the self-weight of the traveling unit 97 and the link connection unit 93 and rolls while being guided by the reference rail 100 . Although two self-weight receiving rollers 94 are installed in the example of FIG. 15, the number is not limited to two.

The link connection unit 93 has a clip installation portion 31 on which the clip 20 is installed and a first elongated hole 32 . The first elongated hole 32 is formed in the upper surface of the link connection unit 93 along the Z-axis and extends in a direction intersecting the movement direction D of the clip link mechanism 90f. A first link member 70 and a second link member 71 are rotatably connected to the link connection unit 93 at the first shaft member 43 .

In the first link member 70 and the second link member 71 connected to the link connection unit 93, one end side of the third link member 72 and the fourth link member are connected in the same manner as described with reference to FIG. 73 is connected. The other end side of the third link member 72 and the other end side of the fourth link member 73 are connected to the fifth shaft member 46 inserted through the first long hole 32 .

The traveling unit 99 includes guide rollers 50 and 51 and self-weight receiving rollers 95 . Note that the guide rollers 50 and 51 and the self-weight receiving roller 95 are an example of a second roller in the present disclosure.

The guide rollers 50 are, for example, bearings. The guide roller 50 is installed below the traveling unit 99 so as to be rotatable around the Z axis. The guide roller 50 rolls along the side surface of the pitch setting rail 120 opposite to the clip.

The guide rollers 51 are, for example, bearings. The guide roller 51 is installed below the travel unit 97 so as to be rotatable around the Z axis while facing the guide roller 50 . The guide roller 51 rolls along the clip-side side surface of the pitch setting rail 120 .

The self-weight receiving roller 95 is, for example, a bearing. The self-weight receiving roller 95 contacts the top surface 120 a of the pitch setting rail 120 along the pitch setting rail 120 . The self-weight receiving roller 95 supports the self-weight of the traveling unit 99 and the link connection unit 98 and rolls while being guided by the pitch setting rail 120 . Although two self-weight receiving rollers 95 are installed in the example of FIG. 15, the number is not limited to two.

Link connection unit 98 has a second slot 62 . A first link member 70 and a second link member 71 are rotatably connected to the link connection unit 98 at the second shaft member 53 .

One end side of the fifth link member 74 and one end side of the sixth link member 75 are connected to the first link member 70 and the second link member 71 connected to the link connection unit 98. . The other end side of the fifth link member 74 and the other end side of the sixth link member 75 are connected to the eighth shaft member 56 inserted through the second long hole 62 .

In the clip link mechanism 90f having such a structure, when the clip pitch is changed by changing the opening angle θ (see FIG. 3) between the first link member 70 and the second link member 71, the link connection unit 93 A pantograph-like link mechanism formed by a first link member 70, a second link member 71, a third link member 72, and a fourth link member 73 is provided above the first length It deforms along the hole 32 . At that time, the first long hole 32 always maintains the direction intersecting the movement direction D of the clip link mechanism 90f regardless of the opening angle θ between the first link member 70 and the second link member 71. . That is, the direction of the clip 20 installed on the link connection unit 93 is always 2 or the like of the opening angle θ regardless of the opening angle θ between the first link member 70 and the second link member 71, that is, the clip pitch. It is held in the direction of the segment line.

The guide roller 40 , the guide roller 41 , and the self-weight receiving roller 94 provided in the traveling unit 97 are in line contact with the reference rail 100 . The contact positions are then aligned along the X-axis. Therefore, when the clip link mechanism 90f moves, the clip side and the anti-clip side of the traveling unit 97, that is, both sides sandwiching the reference rail 100, move in the traveling direction (Y direction, that is, the moving direction D) with respect to the traveling unit 97. When there is a difference in acting force, a force (moment) acts on the traveling unit 97 to rotate the traveling unit 97 around the Z axis. Therefore, the traveling unit 97 tries to turn from the direction intersecting the moving direction D while moving along the reference rail 100 . However, since the traveling unit 97 sandwiches the reference rail 100 between the guide rollers 40 and 41, the orientation does not change. Furthermore, the link connection unit 93 maintains its orientation in the direction intersecting the moving direction D regardless of the clip pitch, as described above.

Further, when the clip pitch is changed in the clip link mechanism 90f, the pantograph-like configuration formed by the first link member 70, the second link member 71, the fifth link member 74, and the sixth link member 75 is changed. link mechanism is deformed along the second elongated hole 62 . At that time, the second elongated hole 62 always maintains the direction intersecting the movement direction D of the clip link mechanism 90f regardless of the opening angle θ between the first link member 70 and the second link member 71. . That is, the direction of the link connection unit 98 is always held in the direction of the bisector of the opening angle θ regardless of the opening angle θ between the first link member 70 and the second link member 71, that is, the clip pitch. be done.

The guide roller 50 , the guide roller 51 , and the self-weight receiving roller 95 provided in the traveling unit 99 are in line contact with the pitch setting rail 120 . The contact positions are then aligned along the X-axis. Therefore, when the clip link mechanism 90f moves, the clip side and the anti-clip side of the traveling unit 99, that is, both sides sandwiching the pitch setting rail 120, move in the traveling direction (Y direction, that is, moving direction D) with respect to the traveling unit 99. , a force (moment) acts on the traveling unit 99 to rotate the traveling unit 99 around the Z-axis. Therefore, the traveling unit 99 tries to turn from the direction intersecting with the moving direction D while moving along the pitch setting rail 120 . However, since the traveling unit 99 sandwiches the pitch setting rail 120 between the guide rollers 50 and 51, the orientation does not change. Furthermore, the link connection unit 98 maintains its orientation in the direction intersecting the movement direction D regardless of the clip pitch, as described above.

As described above, in the clip link mechanism 90f, the clip carrying member 30 includes the traveling unit 97 having the guide rollers 40 and 41 (first rollers) and the self-weight receiving roller 94 (first roller), and the clip installation mechanism. A link connection unit 93 having a portion 31 and a first elongated hole 32 to which the first link member 70 and the second link member 71 are connected. One end side of the third link member 72 and the fourth link member 73 are connected to the first link member 70 and the second link member 71, respectively, from the connection position with the link connection unit 93 to the tip side. be done. The other end sides of the third link member 72 and the fourth link member 73 are the fifth shaft member 46 inserted through the first long hole 32 extending in the direction intersecting the moving direction D of the clip link mechanism 90f. Therefore, when the opening angle θ between the first link member 70 and the second link member 71 is changed, the link connection unit 93 is oriented in a direction intersecting the movement direction D of the clip link mechanism 90f. hold. Therefore, even if the first rollers (the guide rollers 40 and 41 and the self-weight receiving roller 94) of the traveling unit 97 are arranged in a single row, the traveling direction of the link connection unit 93 can be regulated along the moving direction D. As a result, the travel unit 97 can be made smaller.

In the clip link mechanism 90f, the link support member 60 includes a traveling unit 99 having guide rollers 50 and 51 (second rollers) and a self-weight receiving roller 95 (second roller), and a first link member 70. and a link connection unit 98 to which the second link member 71 is connected. One ends of a fifth link member 74 and a sixth link member 75 are connected to the first link member 70 and the second link member 71, respectively, from the connection position with the link connection unit 93 to the tip side. be done. The other end side of the fifth link member 74 and the sixth link member 75 is an eighth shaft member 56 inserted through a second long hole 62 extending in a direction intersecting the moving direction D of the clip link mechanism 90f. Therefore, when the opening angle θ between the first link member 70 and the second link member 71 is changed, the link connection unit 98 is oriented in a direction intersecting the movement direction D of the clip link mechanism 90f. hold. Therefore, even if the second rollers (the guide rollers 50 and 51 and the self-weight receiving roller 95) provided in the traveling unit 99 are configured in a single row, the traveling direction can be regulated along the movement direction D. As a result, the traveling unit 99 can be made smaller.

Reference Signs List 10 Simultaneous biaxial stretching device 10L Left endless loop 10R Right endless loop 20 Clip 28 Drive roller 30 Clip carrying member 31 Clip setting portion 32 First long hole 40 ... guide roller (first roller, first guide roller), 41 ... guide roller (first roller, second guide roller), 42 ... self-weight receiving roller (first roller, first self-weight receiving roller ), 43... First shaft member, 44... Third shaft member, 45... Fourth shaft member, 46... Fifth shaft member, 50... Guide roller (second roller, third guide roller) , 51... Guide roller (second roller, fourth guide roller), 52... Self-weight receiving roller (second roller, second self-weight receiving roller), 53... Second shaft member, 54... Sixth Shaft member 55... seventh shaft member 56... eighth shaft member 60... link support member 62... second long hole 70... first link member 71... second link member 72 ... third link member, 73 ... fourth link member, 74 ... fifth link member, 75 ... sixth link member, 76 ... seventh link member, 77 ... ninth shaft member, 78 ... third 10 shaft members, 79... third long hole, 80, 82... guide rollers, 81, 83, 84, 85, 86... plate-like members (floating prevention members), 87... guide rollers (first rollers), 88... Guide roller (fourth roller) 90a... Clip link mechanism 93, 98... Link connection unit 94... Self weight receiving roller (first roller) 95... Self weight receiving roller (second roller) 97 , 99... Traveling unit 100... Reference rail (first rail) 100a... Top surface 110... Base 120... Pitch setting rail (second rail) 120a... Top surface d... Distance e1, e2 ... distance between axes, g ... roller diameter, p ... minimum clip pitch, S ... sheet-like member (object to be stretched), W ... interval, θ ... opening angle

Claims (12)

A pair of gripping mechanisms, which grip both ends of the object to be stretched in the width direction, are moved by rollers guided on a movement path formed by a pair of endless loops, while the gap between the opposing and adjacent clips is increased. A clip link mechanism of a simultaneous biaxial stretching device that stretches the stretched object in the width direction and the movement path direction by changing,
a rail that forms the endless loop and is composed of a first rail that defines the interval between the adjacent clips and a second rail that is separated from the first rail by a distance corresponding to the interval;
A first roller that is guided by the first rail and moves along the movement path, and the clip is provided on the opposite side of the first rail to the second rail. a clip support member including a clip installation portion extending in a direction intersecting the movement path and penetrating along the direction;
a link support member including a second roller that is guided by the second rail and moves along the movement path;
a first shaft member provided on the opposite side of the clip carrying member and extending in a direction intersecting with the moving path to pivotally support the clip carrying member;
a second shaft member provided on the first rail side of the link support member and extending in a direction intersecting with the movement path to pivotally support the link support member;
a first link member rotatably connected to the first shaft member and the second shaft member closest to the downstream side of the movement path from the first shaft member;
A length equal to that of the first link member rotatably connected to the first shaft member and the second shaft member closest to the upstream side of the movement path from the first shaft member a second link member of
a third shaft member provided parallel to the first shaft member at a position extending the first link member from a connection position with the first shaft member;
a fourth shaft member provided parallel to the first shaft member at a position extending the second link member from a connection position with the first shaft member;
a third link member rotatably connected to the third shaft member;
a fourth link member rotatably connected to the fourth shaft member and having a length equal to that of the third link member;
a fifth shaft member that is inserted through the first elongated hole and rotatably connected to the third link member and the fourth link member;
A clip link mechanism of a simultaneous biaxial stretching device comprising: The third shaft member and the fourth shaft member, when connecting the first link member and the second link member to the first shaft member,
The third shaft member is provided at a position offset upstream of the movement path from a straight line connecting the installation position of the first shaft member and the installation position of the second shaft member,
The fourth shaft member is provided at a position offset downstream of the movement path from a straight line connecting the installation position of the first shaft member and the installation position of the second shaft member,
The clip link mechanism of the simultaneous biaxial stretching device according to claim 1. The clip carrying member comprises:
a traveling unit having the first roller;
a link connection unit having the clip installation portion and the first elongated hole, and to which the first link member and the second link member are connected;
The clip link mechanism of the simultaneous biaxial stretching device according to claim 1 or 2. The first roller is
a first guide roller guided by the first rail;
a second guide roller provided at a position facing the first guide roller across the first rail and guided by the first rail;
a first self-weight receiving roller that contacts the top surface of the first rail along the movement path and moves while supporting the self-weight of the clip carrying member;
The clip link mechanism of the simultaneous biaxial stretching device according to any one of claims 1 to 3. The first guide rollers or the second guide rollers provided on the adjacent clip carrying members are staggered in height,
The diameter of the first guide roller or the second guide roller is larger than the minimum clip pitch of the clip link mechanism,
The clip link mechanism of the simultaneous biaxial stretching device according to claim 4. The link support member further has a second long hole extending in a direction intersecting with the movement path and penetrating along the direction,
a sixth shaft member provided parallel to the second shaft member at a position where the first link member is extended from a connection position with the second shaft member;
a seventh shaft member provided parallel to the second shaft member at a position extending the second link member from a connection position with the second shaft member;
a fifth link member rotatably connected to the sixth shaft member;
a sixth link member rotatably connected to the seventh shaft member and having a length equal to that of the fifth link member;
an eighth shaft member that is inserted through the second elongated hole and rotatably connected to the fifth link member and the sixth link member;
The clip link mechanism of the simultaneous biaxial stretching device according to any one of claims 1 to 5, comprising: The sixth shaft member and the seventh shaft member, when the first link member and the second link member are connected to the second shaft member,
The sixth shaft member is provided at a position offset downstream of the movement path from a straight line connecting the installation position of the second shaft member and the installation position of the first shaft member,
The seventh shaft member is provided at a position offset upstream of the movement path from a straight line connecting the installation position of the second shaft member and the installation position of the first shaft member,
The clip link mechanism of the simultaneous biaxial stretching device according to claim 6. The link support member is
a traveling unit having the second roller;
a link connection unit having the second long hole and connecting the first link member and the second link member;
The clip link mechanism of the simultaneous biaxial stretching device according to claim 6 or 7. The second roller is
a third guide roller guided by the second rail;
a fourth guide roller provided at a position facing the third guide roller across the second rail and guided by the second rail;
a second self-weight receiving roller that contacts the top surface of the second rail along the movement path and moves while supporting the self-weight of the link support member;
The clip link mechanism of the simultaneous biaxial stretching device according to any one of claims 1 to 8. The third guide rollers or the fourth guide rollers provided on the adjacent link support members are arranged in a zigzag pattern,
The diameter of the third guide roller or the fourth guide roller is larger than the minimum clip pitch of the clip link mechanism,
The clip link mechanism of the simultaneous biaxial stretching device according to claim 9. rotatably connected between the first link member and the second link member,
A seventh link member that limits an opening angle between the first link member and the second link member to a predetermined angle or less,
The clip link mechanism of the simultaneous biaxial stretching device according to any one of claims 1 to 10. Further comprising a lifting prevention member that prevents the clip link mechanism from lifting when the clip link mechanism moves,
The clip link mechanism of the simultaneous biaxial stretching device according to any one of claims 1 to 11.

Images