JP7300404B2 - 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 apparatus, clips for gripping a thin film-shaped object to be stretched such as a sheet or a film are arranged symmetrically in 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 stretching machine described in Patent Literature 1 stretches the film laterally and longitudinally using clip links having a zigzag structure in which the ends of the links are connected. More specifically, it has a main stem, which is a clip carrying member, and a pantograph-like link mechanism, and has a guide roller on one end side of the main stem that moves along a reference rail. 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 extending direction) is set according to the distance between the reference rail and the pitch setting rail.

JP 2012-121259 A

In Patent Document 1, the stretching machine sets the interval between adjacent clips (clip pitch) according to the stretching ratio in the moving direction (longitudinal direction) of the object to be stretched.

However, the drawing machine described in Patent Literature 1 does not have a mechanism for holding the maximum value of the clip pitch when the clip pitch is set to the maximum value. Therefore, when the drawing machine is operated with the clip pitch set to the maximum value, a force acts on the clip link mechanism to further increase the clip pitch. This force increases the load on the rail when the clip link mechanism moves, causing wear of the running bearing.

The present invention has been made in view of the above, and provides a clip link mechanism for a simultaneous biaxial stretching device that reduces the load when the clip link mechanism moves when the clip pitch is set to the maximum value. intended to

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 comprises a pair of gripping mechanisms that are connected to grip both ends of a stretched object in the width direction with clips. , while moving by rollers guided on a moving path formed by a pair of endless loops, the distance between the opposing and adjacent clips is changed to move the stretched object in the width direction and the direction of the moving path. A clip link mechanism of a simultaneous biaxial stretching device for stretching, comprising: a first rail defining the interval between adjacent clips; and a second rail separated from the first rail by a distance corresponding to the interval. and a rail forming the endless loop, a first roller guided by the first rail and moving along the movement path, and the second A clip carrying member provided on the opposite side of the rail and having the clip installed thereon, and a second roller guided by the second rail and moving along the movement path. a link support member; a first shaft member provided on the opposite side of the clip support member from the clip and extending in a direction crossing the movement path vertically to support the clip support member; , a second shaft member provided on the side of the first rail, extending in a direction vertically intersecting the movement path and pivotally supporting the link support member; the first shaft member; a first link member rotatably connected from one shaft member to the second shaft member closest to the downstream side of the movement path, the first shaft member, and the first shaft member; A second link member having a length equal to that of the first link member, which is rotatably connected to the second shaft member closest to the upstream side of the movement path from the second link member, and the first link member a third link member rotatably connected between and the second link member for limiting an opening angle between the first link member and the second link member to a predetermined angle or less; and rotating one end side of the third link member to either the first link member or the second link member by a third shaft member parallel to the first shaft member a fourth shaft member movably connected to the other of the first link member and the second link member and parallel to the first shaft member; By slidably inserting the third link member into an elongated hole along the third link member formed on the other end side of the member, the third link member is connected between the first link member and the second link member. It is characterized in that it is rotated according to the opening angle .

The clip link mechanism of the simultaneous biaxial stretching apparatus according to the present invention has the effect of reducing the load on the rails when the clip link mechanism moves when the clip pitch is maximum.

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. FIG. 5 is a side view showing an example of another arrangement structure of the guide rollers; The 1st perspective view of the clip link mechanism which concerns on 1st Embodiment. The 2nd perspective view of the clip link mechanism which concerns on 1st Embodiment. FIG. 4 is a top view showing an example of a state in which the clip link mechanism according to the first embodiment is folded; FIG. 4 is a top view showing an example of a state in which the clip link mechanism according to the first embodiment is opened most; The top view which shows schematic structure of the clip link mechanism which concerns on 2nd Embodiment. 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 lateral 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 the first 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 that are articulated. When the clip 20 moves in the moving direction D, the clip link mechanism 90a adjusts the distance between the clip support member 30 and the link support member 60 in the Y-axis direction to the distance W between the reference rail 100 and the pitch setting rail 120. set to a value according to 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 direction vertically intersecting the moving direction D, that is, 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 . As a result, the contact area between the guide roller 40 and the side surface of the reference rail 100 is increased, so that the clip carrying member 30 can travel stably. 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. The self-weight receiving roller 42 abuts on 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 elongated hole 32 is formed to extend along the X-axis in a direction intersecting the movement direction D and penetrate the clip carrier member 30 in the Z-axis 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 rotatably installed around the Z-axis on a second shaft member 53 extending in a direction vertically intersecting the moving direction D, that is, 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 . As a result, the contact area between the guide roller 50 and the side surface of the pitch setting rail 120 is increased, so that the link support member 60 can travel stably. 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 120 a of the pitch setting rail 120 along the pitch setting rail 120 . 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 along the X-axis in a direction intersecting the moving direction D and penetrate the link support member 60 in the Z-axis direction. The action of the second elongated holes 62 will be described later.

[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 carrying member 30 includes a guide roller 80 installed on the clip 20 side so as to be rotatable 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 prevent the guide rollers 80 and 82 from lifting even when an upward force (a force directed toward the Z-axis positive side) is generated in the moving clip link mechanism 90a. is prevented, the clip link mechanism 90a is prevented from rising.

Instead of the guide roller 40, a guide roller 87 having a larger diameter than the guide roller 40 may be installed, and instead of the guide roller 50, a guide roller 88 having a larger diameter than the guide roller 50 may be installed ( See Figure 5). In this case, the large-diameter guide roller 87 interferes between the adjacent clip carrying members 30 and the large-diameter guide roller 88 interferes between the adjacent link support members 60. are staggered between adjacent clip carrier members 30 and between adjacent link support members 60 . 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.

FIG. 5 is a side view showing an example of another arrangement structure of the guide rollers. When the adjacent clip carrying member 30 and the adjacent link supporting member 60 are moved to the closest position, that is, when they are in the minimum clip pitch state, as shown in FIG. extends under adjacent clip carrier members 30 and adjacent link support members 60 . Therefore, the roller diameter g of the guide rollers 87, 88 can be set larger than the minimum clip pitch p. This provides stability when the reference rail 100 constrains the position of the clip carrier member 30 and when the pitch setting rail 120 constrains the position of the link support member 60 when the clip linkage 90a changes the clip pitch. can be improved. The staggered arrangement of the guide rollers described above may be applied to the guide roller 41 as the second guide roller and the guide roller 51 as the fourth guide roller.

Returning to FIG. 3 , the first shaft member 43 provided on the clip carrying member 30 includes one end side of the first link member 70 and a second link member having the same length as the first link member 70 . 71 is rotatably connected. Further, the second shaft member 53 provided on the link support member 60 has the other end side of the first link member 70 and another clip carrying member adjacent to the upstream side of the moving direction D from the clip carrying member 30 . The other end side of the second link member 71 connected to the first shaft member 43 of the member 30 is rotatably connected.

A third link member 72 is bridged between the first link member 70 and the second link member 71 when viewed from the link support member 60 side. The third link member 72 has one end attached to the first link member 70 and is parallel to the first shaft member 43 and the second shaft member 53, that is, a third shaft member 77 extending in the Z-axis direction. is rotatably connected to the Further, the third link member 72 is formed with a third elongated hole 79 which is an example of the elongated hole of the present disclosure. A fourth shaft member 78 extending parallel to the first shaft member 43 and the second shaft member 53, that is, extending in the Z-axis direction is inserted. The installation position of the third link member 72, that is, the installation positions of the third shaft member 77 and the fourth shaft member 78 will be described later.

The third link member 72 adjusts the opening angle θ between the first link member 70 and the second link member 71 to a range in which the fourth shaft member 78 slides between both ends of the third long hole 79. Restrict. That is, the first link member 70 is in a state in which the fourth shaft member 78 is slid to the far end of the third slot 79 from the third shaft member 77 . and the second link member 71 is regulated to the maximum value. The opening angle θ at this time is an example of the predetermined angle in the present disclosure. The action of the third link member 72 will be described later.

[Description of Link Mechanism Supporting Clip Supporting Member]
A seventh shaft member 44 parallel to the first shaft member 43 is provided at a position where the first link member 70 is extended from the connection position with the first shaft member 43 to the clip side (X-axis positive side). be provided. Further, an eighth shaft parallel to the first shaft member 43 is provided at a position where the first link member 70 is extended from the position where it is connected to the first shaft member 43 to the clip side (X-axis positive side). A member 45 is provided.

One end of the fourth link member 73 is rotatably connected to the seventh shaft member 44 . One end of a fifth link member 74 having the same length as the fourth link member 73 is rotatably connected to the eighth 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 other end side of the second link member 71 is rotatably connected to the second shaft member 53 provided in the link support member 60 closest to the upstream side in the movement direction D from the first shaft member 43. .

The other end side of the fourth link member 73 and the other end side of the fifth link member 74 are rotatably connected to the ninth shaft member 46 inserted through the first long hole 32 .

That is, the first link member 70, the second link member 71, the fourth link member 73, and the fifth link member 74 are connected to the first shaft member 43 and the seventh shaft member 44. , an eighth shaft member 45 and a ninth shaft member 46 to form a pantograph-like link mechanism.

[Description of Link Mechanism Supporting Link Support Member]
A tenth shaft member 54 parallel to the second shaft member 53 extends from the position where the first link member 70 is connected to the second shaft member 53 to the anti-clip side (X-axis negative side). is provided. Further, at a position where the second link member 71 is extended from the position where it is connected to the second shaft member 53 to the anti-clip side (negative side of the X-axis), an eleventh link parallel to the second shaft member 53 is provided. A shaft member 55 is provided.

One end of the sixth link member 75 is rotatably connected to the tenth shaft member 54 . One end of a seventh link member 76 having the same length as the sixth link member 75 is rotatably connected to the eleventh 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 sixth link member 75 and the other end side of the seventh link member 76 are rotatably connected to the twelfth shaft member 56 inserted through the second long hole 62 .

That is, the first link member 70, the second link member 71, the sixth link member 75, and the seventh link member 76 are connected to the second shaft member 53 and the tenth shaft member 54. , are rotatably connected by an eleventh shaft member 55 and a twelfth 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 clip pitch, which is the distance between adjacent clips 20 in the Y-axis direction, 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 clip pitch, which is the distance between adjacent clips 20 in the Y-axis direction, increases.

When the opening angle θ changes, the first link member 70 , the second link member 71 , the fourth link member 73 , and the fifth link member 74 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 sixth link member 75 , and the seventh link member 76 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 the action of the third link member]
Next, the action of the third link member 72 will be described with reference to FIGS. 6 to 9. FIG. FIG. 6 is a first perspective view of the clip link mechanism according to the first embodiment; FIG. 7 is a second perspective view of the clip link mechanism according to the first embodiment; FIG. 8 is a top view showing an example of a state in which the clip link mechanism according to the first embodiment is folded. FIG. 9 is a top view showing an example of the clip link mechanism in the most opened state according to the first embodiment.

As shown in FIGS. 6 and 7, when the third link member 72 limits the opening angle θ between the first link member 70 and the second link member 71 to the maximum value, the connecting first It is assumed that a tensile force that pulls the clip link mechanism 90a in the movement direction D acts on the link member 70 and the second link member 71 . The pulling force gives force to increase the opening angle θ to the clip link mechanism 90a. At this time, the third link member 72 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 if it were a single rigid body against the tensile force. This improves the stability when the clip link mechanism 90a moves with the clip pitch set to the maximum.

If the third link member 72 is not connected, when the clip link mechanism 90a is moved, the opening angle θ between the first link member 70 and the second link member 71 is set to the clip link mechanism 90a. A force acts in a direction to make it larger. At this time, a force acts on the guide roller 40 in the direction of contact with the reference rail 100 . Further, a force acts on the guide roller 50 in the direction of contact with the pitch setting rail 120 . As a result, the guide rollers 40, 50, the reference rail 100, and the pitch setting rail 120 are subjected to an excessive load, and wear progresses on the guide rollers 40, 50, the reference rail 100, and the pitch setting rail 120, shortening their life. may become.

On the other hand, by connecting the third link member 72, the maximum value of the opening angle .theta. , the guide rollers 40, 50, the reference rail 100, and the pitch setting rail 120 can be prevented from being subjected to an excessive load when moving with the clip pitch set to . Since the wear of the reference rail 100 and the pitch setting rail 120 can be prevented, the service life can be extended.

In the clip link mechanism 90a, the links that connect the clip support member 30 and the link support member 60 are the second link member 71, the third link member 72, the third 1 link members 70 are connected in order (see FIG. 4). When the first link member 70 and the second link member 71 are closed to set the minimum clip pitch, the fourth shaft member 78 extends along the third elongated hole 79 to the third shaft. Slide to the position closest to member 77 . At this time, the clip link mechanism 90a is in a state in which the third link member 72 enters the back side of the second link member 71, as shown in FIG. That is, even when the third link member 72 is installed, the minimum value of the clip pitch can be the same as when the third link member 72 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 fourth shaft member 78 is positioned in the third elongated hole 79 so that the third shaft member Slide away from 77. At this time, the clip link mechanism 90a is in the state shown in FIG.

Next, the installation position of the third link member 72, that is, the installation positions of the third shaft member 77 and the fourth shaft member 78 will be described with reference to FIG. In the clip link mechanism 90a, the distance e1 between the second shaft member 53 and the third shaft member 77 and the distance e2 between the second shaft member 53 and the fourth shaft member 78 are e1 The third shaft member 77 and the fourth shaft member 78 are installed such that <e2. As a result, when the opening angle θ between the first link member 70 and the second link member 71 is changed in the direction of decreasing the clip pitch and in the direction of increasing the clip pitch, the fourth Since the shaft member 78 can be slid along the third long hole 79 with less force, the opening angle θ can be easily changed.

The third link member 72 is installed between the first link member 70 and the second link member 71 so as to satisfy the same conditions as described above when viewed from the clip carrying member 30 side. good too.

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 support member 30 in a direction crossing the movement direction D vertically. In addition, the first link member 70 and the second link member 71 are rotatable on the second shaft member 53 installed in the link support member 60 and installed in a direction vertically crossing the movement direction D. connected to A third link member 72 is provided between the first link member 70 and the second link member 71 to limit the opening angle θ between the first link member 70 and the second link member 71 to a predetermined angle or less. is connected. Therefore, the clip link mechanism 90a can reduce the load on the reference rail 100 and the pitch setting rail 120 when the clip link mechanism 90a moves when the clip pitch is maximum.

Further, in the clip link mechanism 90a of the simultaneous biaxial stretching device 10, the third link member 72 is positioned between the first link member 70 and the second link member 71 in the Z-axis direction (vertical direction). One end of the third link member 72 is rotatably connected to either the first link member 70 or the second link member 71 by a third shaft member 77, thereby connecting the first A fourth shaft member 78 provided on the other of the link member 70 or the second link member 71 is a third shaft member 78 along the third link member 72 formed on the other end side of the third link member 72 . 3 elongated hole 79 and slide along the third elongated hole 79, the third link member 72 adjusts the opening angle between the first link member 70 and the second link member 71. It rotates according to θ. Therefore, the clip pitch can be set to a value corresponding to the distance W between the reference rail 100 and the pitch setting rail 120 without applying an extra load to the first link member 70 and the second link member 71. .

Further, in the clip link mechanism 90a of the simultaneous biaxial stretching device 10, the interaxial distance e1 between the second shaft member 53 and the third shaft member 77 is is shorter than the inter-axis distance e2. Therefore, since the fourth shaft member 78 can be slid along the third elongated hole 79 with a smaller force, the opening angle θ between the first link member 70 and the second link member 71 can be easily adjusted. can be changed to

Further, in the clip link mechanism 90a of the simultaneous biaxial stretching device 10, the guide rollers 87 (first guide rollers) provided on the adjacent clip carrying members 30 are arranged in a staggered manner so that the guide rollers The roller diameter g (diameter) of 87 is larger than the minimum clip pitch p of the clip link mechanism 90a. Therefore, when the clip link mechanism 90a 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 90a of the simultaneous biaxial stretching apparatus 10, the guide rollers 88 (third guide rollers) provided on the adjacent link support members 60 are arranged in a staggered manner so that the guide rollers The roller diameter g (diameter) of 88 is larger than the minimum clip pitch p of the clip link mechanism 90a. Therefore, when the clip link mechanism 90a changes the clip pitch, the stability when the pitch setting rail 120 constrains the position of the link support member 60 can be improved.

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.

(Second embodiment)
Next, the clip link mechanism 90b of the simultaneous biaxial stretching device 10 according to the second embodiment will be described.

The clip link mechanism 90b is an example of a clip link mechanism that can set a larger clip pitch with a short link member. In other words, for example, compared to the clip link mechanism 90a of the first embodiment, when the link members have the same length, it is an example of a clip link mechanism that can set a larger draw ratio in the vertical direction. .

A schematic configuration of the clip link mechanism 90b will be described with reference to FIG. FIG. 10 is a top view showing a schematic configuration of the clip link mechanism according to the second embodiment.

The clip link mechanism 90b combines the clip support member 30 and the link support member 60 with a plurality of link members 70a, 70b, 70c instead of the first link member 70 (see FIG. 3) described in the first embodiment. , 70d.

The link member 70a is rotatably connected to the second shaft member 53 and a shaft member 58a provided in the intermediate portion of the link member 70d. Note that the link member 70a is an example of a first link member in the present disclosure. Also, the shaft member 58a is an example of a fifth shaft member in the present disclosure.

The link member 70d has one end rotatably connected to the first shaft member 43 of the clip support member 30 and the other end of the link support member 60 closest to the upstream side in the movement direction D from the clip support member 30. 2 is rotatably connected to the shaft member 53 . Note that the link member 70d is an example of a second link member in the present disclosure.

A shaft member 58b extending in the X-axis direction intersecting the movement direction D and intersecting with the link member 70a (first link member) is provided in parallel with the first shaft member 43. be done. At this time, the shaft member 58b is provided at a position where the distance between the shaft member 58a and the first shaft member 43 is equal to the distance between the shaft member 58a and the shaft member 58b. The other end side of the link member 70c whose one end side is connected to the first shaft member 43 and the other end side of the link member 70b whose one end side is connected to the shaft member 58b are parallel to the shaft member 58a. , is rotatably connected to a shaft member 58c provided at a symmetrical position with respect to a line segment connecting the first shaft member 43 and the shaft member 58b. Also, the shaft member 58b is an example of a sixth shaft member in the present disclosure.

More specifically, the link member 70b and the link member 70c have the same length, and the link members 70a, 70b, 70c, and 70d form a pantograph-like link mechanism as shown in FIG.

In the clip link mechanism 90b, when the clip pitch is set to the maximum, that is, the longitudinal magnification is set to the maximum, the distance in the Y-axis direction between the adjacent clip support member 30 and the link support member 60 is approximately the link length of the link member 70a. , is the sum of the distances between the first shaft member 43 and the shaft member 58a. On the other hand, in the clip link mechanism 90a described in the first embodiment, when the clip pitch is set to the maximum, that is, the longitudinal magnification is set to the maximum, the clip support member 30 and the link support member 60 are adjacent to each other in the Y-axis direction. is approximately the link length of the first link member 70 . Therefore, the clip link mechanism 90b can set a larger clip pitch with a shorter link member than the clip link mechanism 90a.

A third link member 72 is rotatably bridged between the link member 70a and the link member 70d connected to the second shaft member 53, as shown in FIG. The third link member 72 limits the opening angle θ between the link member 70a and the link member 70d to a predetermined angle or less, as described in the first embodiment.

As described above, in the clip link mechanism 90b of the simultaneous biaxial stretching device 10, the link member 70a (first link member) is provided in the intermediate portion of the link member 70d (second link member). It is rotatably connected to a shaft member 58a (fifth shaft member) parallel to one shaft member 43 . The distance between the shaft member 58a and the first shaft member 43 and A shaft member 58b parallel to the first shaft member 43 is provided so that the distance from the shaft member 58b (sixth shaft member) is equal. The other end side of the link member 70c whose one end side is connected to the first shaft member 43 and the other end side of the link member 70b whose one end side is connected to the shaft member 58b are parallel to the shaft member 58a. It is rotatably connected to a shaft member 58c provided at a symmetrical position with respect to the line segment connecting the first shaft member 43 and the shaft member 58b with respect to the shaft member 58a. By providing such a pantograph-like link mechanism, it is possible to set a larger clip pitch with a short link member 70a (first link member).

(Third embodiment)
Next, the clip link mechanism 90c of the simultaneous biaxial stretching apparatus 10 according to the third embodiment will be described with reference to FIG. 11A and 11B are a top view and a side view of the clip link mechanism according to the third embodiment. FIG.

The clip link mechanism 90 c has a structure in which the clip support member 30 is divided into a travel unit 97 and a link connection unit 93 . The traveling unit 97 and the link connection unit 93 are installed rotatably around the first shaft member 43 (around the Z axis). The clip link mechanism 90 c has a structure in which the link support member 60 is divided into a travel unit 99 and a link connection unit 98 . The traveling unit 99 and the link connection unit 98 are installed rotatably around the second shaft member 53 (around 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. 11, the number is not limited to two. Note that the self-weight receiving roller 94 is an example of a first self-weight receiving roller in the present disclosure.

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 (X-axis direction) intersecting the movement direction D of the clip link mechanism 90c. 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 .

The first link member 70 and the second link member 71 connected to the link connection unit 93 are connected to one end side of the third link member 72 and the fourth link member 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 ninth 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. 11, the number is not limited to two. Note that the self-weight receiving roller 95 is an example of a second self-weight receiving roller in the present disclosure.

Link connection unit 98 has a second slot 62 . The second elongated hole 62 is formed along the Z-axis in the upper surface of the link connection unit 98 and extends in a direction (X-axis direction) intersecting the moving direction D of the clip link mechanism 90c. The first link member 70 and the 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 of the fifth link member 74 and the other end of the sixth link member 75 are connected to the twelfth shaft member 56 inserted through the second long hole 62 .

In the clip link mechanism 90c 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 elongated hole 32 always maintains the direction intersecting the movement direction D of the clip link mechanism 90c 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.

Between the first link member 70 and the second link member 71, the third link member 72 described in the first and second embodiments is bridged. The third link member 72 acts in the same manner as described in the first and second embodiments, and determines the opening angle θ between the first link member 70 and the second link member 71. limited to less than an angle.

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 90c 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-axis direction, that is, moving direction D) with respect to the traveling unit 97. , 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 movement direction D regardless of the clip pitch, as described above.

Further, when the clip pitch is changed in the clip link mechanism 90c, the pantograph-shaped clip 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 90c 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 90c is moved, the clip side and the anti-clip side of the traveling unit 99, that is, both sides sandwiching the pitch setting rail 120, move toward the traveling unit 99 in the traveling direction (Y-axis direction, that is, the movement direction D). ), 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 moving direction D regardless of the clip pitch, as described above.

As described above, in the clip link mechanism 90c of the simultaneous biaxial stretching device 10, the clip carrying member 30 includes the traveling unit 97 having the guide rollers 40 and 41 and the self-weight receiving roller 94 (first roller), and the clip installation mechanism. A link connection unit 93 having a portion 31 to which the first link member 70 and the second link member 71 are connected. The traveling unit 97 and the link connection unit 93 are installed rotatably around the first shaft member 43 . Therefore, the clip 20 installed on the link connection unit 93 can be stably held in the direction intersecting the moving direction D.

In addition, the clip link mechanism 90c 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 94 (first self-weight receiving roller) that abuts along the moving direction D and moves while supporting the self-weight of the clip carrying member 30 . Therefore, even if the first rollers (the guide rollers 40 and 41 and the self-weight receiving roller 94) provided in the traveling unit 97 are arranged in a row, the orientation of the link connection unit 93 is restricted in the direction intersecting the moving direction D, that is, in the X-axis direction. can do. As a result, the traveling unit 97 can be downsized, and the clip link mechanism 90c can be smoothly moved along the reference rail 100. As shown in FIG.

In the clip link mechanism 90c of the simultaneous biaxial stretching apparatus 10, the link support member 60 includes a traveling unit 99 having guide rollers 50 and 51 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. The traveling unit 99 and the link connection unit 98 are installed rotatably around the second shaft member 53 . Therefore, the link connection unit 98 can be stably held in the direction intersecting the moving direction D.

In addition, the clip link mechanism 90c 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. 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 arranged in a row, the orientation of the link connection unit 98 is restricted in the direction intersecting the movement direction D, that is, in the X-axis direction. can do. As a result, the traveling unit 99 can be downsized, and the clip link mechanism 90c can be smoothly moved along the pitch setting rail 120. As shown in FIG.

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 , 87... 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... seventh shaft member, 45... eighth shaft member, 46... ninth shaft member, 50, 88... guide rollers (second roller, third guide roller), 51... guide roller (second roller, fourth guide roller), 52... dead weight receiving roller (second roller, second dead weight receiving roller), 53... second shaft member, 54 10th shaft member 55 11th shaft member 56 12th shaft member 58a shaft member (fifth shaft member) 58b shaft member (sixth shaft member) 58c shaft Members 60 Link support member 62 Second long hole 70 First link member 70a Link member (first link member) 70b, 70c Link member 70d Link member (second 71... Second link member 72... Third link member 73... Fourth link member 74... Fifth link member 75... Sixth link member 76... Seventh link member Link member 77 Third shaft member 78 Fourth shaft member 79 Third elongated hole (long hole) 80, 82 Guide roller 81, 83 Plate-like member (lifting prevention member) , 90a, 90b, 90c... clip link mechanism, 93, 98... link connection unit, 94... self-weight receiving roller (first roller), 95... self-weight receiving roller (second roller), 97, 99... running unit, DESCRIPTION OF SYMBOLS 100... Reference rail (1st rail) 100a, 120a... Top surface 110... Base 120... Pitch setting rail (2nd rail) D... Direction of movement 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 (10)

A pair of gripping mechanisms, which grip both ends in the width direction of the object to be stretched, are moved by rollers guided on a movement path formed by a pair of endless loops, while the gaps between the opposing and adjacent clips are adjusted. A clip link mechanism of a simultaneous biaxial stretching device that stretches the stretched object in the width direction and the direction of the movement path 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 carrier member comprising a clip mounting portion for
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 vertically crossing 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 vertically 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 second link member rotatably connected between the first link member and the second link member for limiting an opening angle between the first link member and the second link member to a predetermined angle or less. 3 link members ,
One end side of the third link member is rotatably connected to either the first link member or the second link member by a third shaft member parallel to the first shaft member. do,
A fourth shaft member provided on the other of the first link member or the second link member and parallel to the first shaft member is formed on the other end side of the third link member. By slidably inserting the long hole along the third link member,
rotating the third link member according to an opening angle between the first link member and the second link member;
Clip link mechanism of simultaneous biaxial stretching device. an inter-axis distance between the second shaft member and the third shaft member is shorter than an inter-axis distance between the second shaft member and the fourth shaft member;
The clip link mechanism of the simultaneous biaxial stretching device according to claim 1 . The first link member is rotatably connected to a fifth shaft member parallel to the first shaft member provided at an intermediate portion of the second link member,
The fifth shaft member and the first shaft member are arranged on the first link member at a position where the clip support member is extended in a direction intersecting with the moving path and intersects with the first link member. and a sixth shaft member parallel to the first shaft member so that the distance between the fifth shaft member and the sixth shaft member is equal,
The other end side of the link member whose one end side is connected to the first shaft member and the other end side of the link member whose one end side is connected to the sixth shaft member are the fifth shaft member. rotatably connected to a shaft member provided parallel to the first shaft member and symmetrical with respect to a line segment connecting the first shaft member and the sixth shaft member;
The clip link mechanism of the simultaneous biaxial stretching device according to claim 1 or 2 . The clip carrying member comprises:
a traveling unit having the first roller;
A link connection unit having the clip installation portion and to which the first link member and the second link member are connected,
the traveling unit and the link connection unit are rotatably installed around the first shaft member;
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 4 . 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 5 . The link support member is
a traveling unit having the second roller;
a link connection unit to which the first link member and the second link member are connected,
the traveling unit and the link connection unit are rotatably installed around the second shaft member;
The clip link mechanism of the simultaneous biaxial stretching device according to any one of claims 1 to 6 . 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 7 . 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 8 . 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 9 .

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