Linkage mechanism for resin film stretching device, resin film stretching device, and method for manufacturing resin film

Abstract

The present application can improve the performance of a link device. A link mechanism (11C) included in the link device has, for example, a roller (110A) fixed to a link shaft (40A) by a bracket (100A) and capable of contacting a link pressing portion (70).

Description

Technical Field

[0001] This invention relates to a linkage mechanism for a resin film stretching device, a resin film stretching device, and a resin film manufacturing technology. Background Technology

[0002] The stretching apparatus is configured to perform longitudinal and transverse stretching in mutually orthogonal directions. The method of performing longitudinal and transverse stretching sequentially using this apparatus is called successive biaxial stretching. Conversely, the method of performing longitudinal and transverse stretching in one continuous motion is called simultaneous biaxial stretching. Compared to the successive stretching method, simultaneous biaxial stretching offers advantages such as less susceptibility to scratches, a wider range of adaptable materials, the ability to stretch even at high crystallization rates, and higher uniformity of physical properties in both directions.

[0003] For example, Japanese Patent Application Publication No. 2004-155138 (Patent Document 1) discloses a sheet-like stretching device, which is driven by sprockets on the inlet and outlet sides of the sheet-like material to form a ring-shaped linkage device consisting of multiple equal-length linkage devices arranged in the shape of a folding ruler on both sides of the sheet-like material, and is guided by a guide rail formed by a guide portion arranged in the direction of travel with its end extended, thereby stretching the sheet-like material in the lateral direction.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2004-155138 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] For example, a membrane stretching apparatus includes a linkage device with a linkage mechanism for holding and stretching the membrane. This linkage mechanism has a membrane holding portion for holding the membrane. Furthermore, a guide plate is pressed against the membrane holding portion to open the membrane holding portion, and the membrane is clamped into the opened membrane holding portion. As a result, the membrane can be held by the membrane holding portion of the linkage mechanism.

[0009] Regarding this point, when the guide plate is pressed against the membrane holding part to open the membrane holding part, a torque is generated in the linkage mechanism, which may cause the linkage mechanism to tilt. Measures have been taken to suppress this tilting, but the current measures have room for improvement. Therefore, further research is desired as a measure to suppress the tilting of the linkage mechanism.

[0010] Methods for solving problems

[0011] In one embodiment, the linkage mechanism of the resin film stretching device includes a roller that is fixed to the linkage shaft by means of a bracket and can contact the pressing part of the linkage.

[0012] One embodiment of the resin film stretching device includes a linkage device having rollers.

[0013] One embodiment of the resin film manufacturing method uses a linkage device to manufacture the resin film. In response to the torque generated on the linkage mechanism, the lifting of the linkage mechanism caused by the torque can be suppressed by making the roller contact the pressing part of the linkage.

[0014] Invention Effects

[0015] According to one implementation, the performance of the linkage device can be improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the configuration of a membrane manufacturing system including a stretching device.

[0017] Figure 2 This is a top view schematically illustrating the structure of the tensioning device.

[0018] Figure 3 This is a top view schematically illustrating the structure of the tensioning device.

[0019] Figure 4 This is a schematic diagram showing the linkage mechanism that is holding the membrane.

[0020] Figure 5 This diagram illustrates the release action of the membrane holding part, which involves the action of holding the membrane by the linkage mechanism and the action of unloading the membrane from the linkage mechanism.

[0021] Figure 6 This is a diagram illustrating the structure of a linkage mechanism in linkage technology.

[0022] Figure 7 This is a diagram illustrating the new insights discovered by the inventors of this application.

[0023] Figure 8 (a) is a diagram showing the closed state of the linkage mechanism, and (b) is a diagram showing the open state of the linkage mechanism.

[0024] Figure 9 (a) is a perspective view showing the "closed state" of the linkage mechanism in Embodiment 1, and (b) is a perspective view showing the "open state" of the linkage mechanism in Embodiment 1.

[0025] Figure 10 This is a diagram illustrating the linkage mechanism in Embodiment 1.

[0026] Figure 11 (a) is a diagram showing the closed state of the linkage mechanism, and (b) is a diagram showing the open state of the linkage mechanism.

[0027] Figure 12 This is a flowchart illustrating the membrane manufacturing process.

[0028] Figure 13 This is a flowchart illustrating an example of the process of holding the membrane.

[0029] Figure 14 This is a diagram showing an example of a linkage mechanism.

[0030] Figure 15 (a) is a diagram showing the closed state of the linkage mechanism, and (b) is a diagram showing the open state of the linkage mechanism.

[0031] Figure 16 This is a diagram showing the linkage mechanism in Embodiment 2.

[0032] Figure 17 (a) is a diagram showing the closed state of the linkage mechanism, and (b) is a diagram showing the open state of the linkage mechanism. Detailed Implementation

[0033] Throughout the accompanying drawings illustrating the embodiments, the same reference numerals are generally used to label the same components, and repeated descriptions are omitted. It should be noted that, to make the drawings clear and easy to understand, section lines are sometimes also used in the top view.

[0034] (Implementation Method 1)

[0035] <Membrane Manufacturing System>

[0036] Figure 1 This is a schematic diagram showing the configuration of a membrane manufacturing system including a stretching device.

[0037] exist Figure 1 In the membrane manufacturing system 1, there are an extrusion device 2, a T-die 3, a material roll cooling device 4, a stretching device 5, a traction device 6, and a winding device 7.

[0038] In membrane manufacturing system 1, membrane manufacturing is performed, for example, as follows.

[0039] First, raw materials are supplied to the raw material supply section 2a of the extrusion unit 2. The raw materials supplied to the extrusion unit 2 include resin materials (e.g., granular thermoplastic resin materials), additives, etc. The raw materials supplied to the extrusion unit 2 are conveyed while being mixed. Specifically, by the rotation of the screw, the raw materials supplied to the extrusion unit 2 are melted and mixed while being conveyed forward inside the extrusion unit 2. The mixed raw materials (mixture) from the extrusion unit 2 are supplied to the T-die 3. The mixture supplied to the T-die 3 is extruded from the slit of the T-die 3 into the material roll cooling device 4. The mixture supplied from the extrusion unit 2 to the T-die 3 passes through the T-die 3 and is formed into a predetermined shape (here, a film).

[0040] The compound extruded from T-die 3 is cooled in material roll cooling device 4 to form film 8. Film 8 is a cured resin film. More specifically, film 8 is a thermoplastic resin film. Film 8 is continuously extruded from T-die 3. As a result, film 8 is continuously supplied to stretching device 5.

[0041] The film 8 supplied to the stretching device 5 is stretched by the stretching device 5 along the MD and TD directions. After being stretched (elongated) by the stretching device 5, the film 8 is transported to the winding device 7 by the traction device 6 and wound onto the winding device 7. The film 8 wound on the winding device 7 is cut as needed.

[0042] Figure 1 The membrane manufacturing system 1 shown manufactures a membrane in the manner described above. It should be noted that the membrane manufacturing system 1 can be modified in various ways depending on the characteristics of the manufactured membrane. For example, sometimes... Figure 1 An extraction tank is provided near the traction device 6 shown to remove plasticizers (such as paraffin) contained in the membrane 8.

[0043] The stretching device 5, a component of the membrane manufacturing system 1, transports the membrane 8 in the MD direction while stretching it in both the MD and TD directions. Here, the MD (Machine Direction) direction is the transport direction of the membrane 8. The TD (Transverse Direction) direction is the direction that intersects the transport direction of the membrane 8.

[0044] Therefore, in the following explanation, the MD direction will sometimes be referred to as the "transport direction" or "longitudinal direction," and the TD direction as the "lateral direction." The MD and TD directions are intersecting directions, or more specifically, orthogonal directions. That is to say, Figure 1 The stretching device 5 shown is a stretching device that can simultaneously stretch the membrane 8 in two intersecting directions while transporting the membrane 8, and it is called a "simultaneous biaxial stretching device".

[0045] <Composition of the tensioning device>

[0046] Next, the structure of the stretching device 5, which is a component of the membrane manufacturing system 1, will be explained.

[0047] Figure 2 and Figure 3 This is a schematic top view illustrating the construction of the tensioning device. Figure 2 and Figure 3In the present invention, the tensioning device 5 has a pair of linkage devices 10. The pair of linkage devices 10 are separated when viewed from above. In the following description, one of the linkage devices 10 is sometimes referred to as "linkage device 10R" and the other linkage device 10 is sometimes referred to as "linkage device 10L".

[0048] exist Figure 2 and Figure 3 In this configuration, the linkage 10R is positioned on the right (R side) relative to the transport direction (MD direction), and the linkage 10L is positioned on the left (L side) relative to the transport direction (MD direction). The linkage 10R and linkage 10L are separated in the TD direction, sandwiching the membrane 8 which is positioned opposite each other in the TD direction. The membrane 8 is disposed in the space between the linkage 10R and linkage 10L and is transported in the MD direction. In other words, the space between the opposing linkage 10R and linkage 10L functions as a transport section for transporting the membrane 8.

[0049] exist Figure 3 In this structure, the stretching device 5 is divided into three zones: 20A, 20B, and 20C, along the transport direction (MD direction). Zone 20A is the preheating zone, zone 20B is the stretching zone, and zone 20C is the heat-setting zone. Zones 20A, 20B, and 20C are arranged sequentially along the transport direction (MD direction).

[0050] In the stretching device 5, the inlet of the membrane 8 is (in...) Figure 2 The portion indicated by "IN" is located to the left of region 20A. Additionally, in the stretching device 5, the outlet of the membrane 8 (in...) Figure 2 The portion marked "OUT" is located to the right of region 20C. Furthermore, region 20B, where the stretching process is performed, is located between region 20A (where the inlet is located) and region 20C (where the outlet is located).

[0051] Figure 2 The heat treatment section 9 shown covers a portion of region 20A, the entire region 20B, and a portion of region 20C. Furthermore, the heat treatment section 9 covers the central portion of the connecting rod devices 10R and 10L, heating the film 8 carried by the connecting rod devices 10R and 10L. In this embodiment, the heat treatment section 9 is, for example, configured as an oven capable of heating the film 8 to a desired temperature. The film 8 passes through the interior of the oven, which serves as the heat treatment section 9, while being held by the connecting rod devices 10R and 10L.

[0052] like Figure 2 and Figure 3As shown, both the linkage device 10R and the linkage device 10L have multiple linkage mechanisms 11 connected in a circular chain configuration. Each linkage mechanism 11 has a membrane holding portion 21, referred to as a clamp, which serves as a gripper for holding the membrane 8. The membrane 8 is held by the membrane holding portions 21 of the linkage mechanisms 11 constituting the linkage device 10R and the linkage mechanisms 11 constituting the linkage device 10L. That is, one side (R side / right side) of the membrane 8 is held by the multiple membrane holding portions 21 of the linkage device 10R, and the other side (L side / left side) of the membrane 8 is held by the multiple membrane holding portions 21 of the linkage device 10L.

[0053] In addition to multiple linkage mechanisms 11, each of the linkage devices 10R and 10L has a pair of tracks 13 and 14 arranged on a support platform (base). In each linkage device 10R and 10L, track 13 is arranged on the inner circumferential side and track 14 is arranged on the outer circumferential side.

[0054] Therefore, track 13 is sometimes referred to as the "inner track" and track 14 as the "outer track". In addition, track 13 is sometimes referred to as the "reference track" or "SP track" and track 14 as the "MD track".

[0055] The tracks 13 and 14 of each of the linkage devices 10R and 10L are arranged in a ring within the regions 20A, 20B, and 20C. For example, the tracks 13 and 14 turn back in region 20A, where the inlet of the conveying membrane 8 is located, and turn back in region 20C, where the outlet of the conveying membrane 8 is located, thus being arranged in a ring within the regions 20A, 20B, and 20C.

[0056] Three sprockets 15, 16, and 17 are provided inside the track 13 of the linkage 10R. Similarly, three sprockets 15, 16, and 17 are provided inside the track 13 of the linkage 10L. Sprockets 15 and 16 in both linkage 10R and 10L are positioned outside region 20A, and sprocket 17 in both linkage 10R and 10L is positioned outside region 20C. Sprockets 15 and 16 are positioned outside the heat treatment section 9, which covers a portion of region 20A. Sprocket 17 is positioned outside the heat treatment section 9, which covers a portion of region 20C. In other words, sprockets 15, 16, and 17 in both linkage 10R and 10L are positioned outside the oven chamber, which serves as the heat treatment section 9.

[0057] The multiple linkage mechanisms 11 of each linkage device 10R and linkage device 10L are arranged on the track 13 and track 14 in a state that allows them to move along the track 13 and track 14. Figure 3The sprockets 15, 16, and 17 of the linkage 10R shown engage with a plurality of linkage mechanisms 11 of the linkage 10R. Therefore, when the sprockets 15, 16, and 17 rotate, a driving force is applied to the plurality of linkage mechanisms 11 of the linkage 10R, and these linkage mechanisms 11 move (travel) along the tracks 13 and 14 of the linkage 10R. Figure 3 The sprockets 15, 16, and 17 of the linkage 10L shown engage with the plurality of linkage mechanisms 11 provided by the linkage 10L. Therefore, when the sprockets 15, 16, and 17 rotate, the driving force acts on the plurality of linkage mechanisms 11 provided by the linkage 10L, and these linkage mechanisms 11 move (travel) along the tracks 13 and 14 of the linkage 10L. In other words, the tracks 13 and 14 provided by each linkage 10R and 10L are guide rails for moving (traveling) the plurality of linkage mechanisms 11 in a predetermined direction.

[0058] In the following explanation, Figure 3 Regarding the various linkage devices 10R and 10L shown, the side opposite to the membrane 8 is sometimes referred to as the "membrane side," and the side opposite to the membrane side is referred to as the "return side." That is, the side on which the multiple linkage mechanisms 11 move from the inlet (IN) toward the outlet (OUT) with the membrane holding part 21 holding the membrane 8 is called the "membrane side," and the side on the opposite side of the membrane side on which the multiple linkage mechanisms 11 move from the outlet (OUT) toward the inlet (IN) with the membrane holding part 21 not holding the membrane 8 is called the "return side."

[0059] The spacing P (sometimes referred to as "linkage spacing") between adjacent linkages 11 varies according to the interval L1 between rails 13 and 14. In other words, the spacing P between adjacent linkages 11 can be adjusted by adjusting the interval L1 between rails 13 and 14.

[0060] For example, as detailed below, the smaller the interval L1 between rails 13 and 14, the larger the distance P between adjacent linkages 11. In other words, the larger the interval L1 between rails 13 and 14, the smaller the distance P between adjacent linkages 11. The operation of the tensioning device 5 will be explained below based on this.

[0061] <Action of the tensioning device>

[0062] The membrane 8, supplied from the material roll cooling device 4 to the stretching device 5, is held at the inlet of the stretching device 5 by connecting rod devices 10R and 10L. Specifically, the membrane 8 is... Figure 2 and Figure 3The membrane holding portion 21 of each of the linkage mechanisms 11 of the linkage devices 10R and 10L shown in the figure is held. More specifically, the membrane 8 is held on one side in the width direction by the membrane holding portion 21 of the linkage mechanism 11 of the linkage device 10R, and on the other side in the width direction by the membrane holding portion 21 of the linkage mechanism 11 of the linkage device 10L.

[0063] The membrane 8, held by membrane holding portions 21 on both sides in the width direction, is transported from the inlet to the outlet of the stretching device 5 along with the movement of the linkage mechanism 11 including the membrane holding portions 21, passing sequentially through region 20A (preheating region), region 20B (stretching region), and region 20C (heat-setting region). During its passage through region 20B (stretching region), the membrane 8 is stretched in both the MD and TD directions. Then, the membrane 8 passes through region 20C (heat-setting region) and reaches the outlet, where it is unloaded from the membrane holding portions 21. The membrane 8 unloaded from the membrane holding portions 21 is transported by the traction device 6 and then transferred from the traction device 6 to the winding device 7.

[0064] like Figure 3 As shown, in region 20A (preheating region), the interval (separation distance in the TD direction) L between the connecting rod assembly 10R and the connecting rod assembly 10L is approximately constant. Therefore, in region 20A, the membrane 8 is not stretched in the TD direction. Consequently, in region 20A, the width (dimension in the TD direction) of the transported membrane 8 remains constant.

[0065] Furthermore, in region 20A, the interval L1 between tracks 13 and 14 on the membrane side of linkage 10R is approximately constant. Therefore, in region 20A, the spacing P of the linkage mechanisms 11 on the membrane side of linkage 10R is approximately constant, and thus, the spacing of the membrane holding portions 21 on the membrane side of linkage 10R is also approximately constant. Similarly, in region 20A, the interval L1 between tracks 13 and 14 on the membrane side of linkage 10L is approximately constant. Therefore, in region 20A, the spacing P of the linkage mechanisms 11 on the membrane side of linkage 10L is approximately constant, and thus, the spacing of the membrane holding portions 21 on the membrane side of linkage 10L is also approximately constant. As a result, in region 20A, the membrane 8 is not stretched in the MD direction. That is, in region 20A, the membrane 8 is not stretched in either the TD or MD directions.

[0066] Next, the operation of the tensioning device 5 in area 20B will be explained.

[0067] In region 20B, as the material moves in the transport direction (MD direction), the gap L (the gap in the TD direction) between the linkage 10R and the linkage 10L gradually increases. Therefore, in region 20B, the membrane 8 is stretched and elongated in the TD direction as it moves in the transport direction (MD direction). In other words, in region 20B, the width (the dimension in the TD direction) of the membrane 8 gradually increases as it moves in the transport direction (MD direction).

[0068] Furthermore, in region 20B, as the device moves in the transport direction (MD direction), the gap L1 between tracks 13 and 14 on the membrane side of the linkage device 10R gradually decreases, and the gap L1 between tracks 13 and 14 on the membrane side of the linkage device 10L also gradually decreases. Therefore, in region 20B, as the device moves in the transport direction (MD direction), the spacing P of the linkage mechanisms 11 on the membrane side of the linkage device 10R gradually increases, and the spacing of the membrane holding portions 21 on the membrane side of the linkage device 10R also gradually increases. Similarly, in region 20B, as the device moves in the transport direction (MD direction), the spacing P of the linkage mechanisms 11 on the membrane side of the linkage device 10L gradually increases, and the spacing of the membrane holding portions 21 on the membrane side of the linkage device 10L also gradually increases. As a result, in region 20B, as the device moves in the transport direction (MD direction), the membrane 8 is stretched and elongated in the MD direction.

[0069] Therefore, in region 20B, as the membrane 8 moves in the transport direction (MD direction), it is stretched in both the TD and MD directions. That is, in region 20B, the membrane 8 is subjected to stretching treatment in both the TD and MD directions.

[0070] Next, the operation of the tensioning device 5 in region 20C will be explained.

[0071] In region 20C, the interval (distance in the TD direction) L between the connecting rod assembly 10R and the connecting rod assembly 10L is approximately constant. Therefore, in region 20C, the membrane 8 is not stretched in the TD direction. Consequently, in region 20C, the width (dimension in the TD direction) of the transported membrane 8 remains constant.

[0072] Furthermore, in region 20C, the interval L1 between tracks 13 and 14 on the membrane side of linkage 10R is approximately constant. Therefore, in region 20C, the spacing P of the linkage mechanisms 11 on the membrane side of linkage 10R is approximately constant, and thus, the spacing of the membrane holding portions 21 on the membrane side of linkage 10R is also approximately constant. Similarly, in region 20C, the interval L1 between tracks 13 and 14 on the membrane side of linkage 10L is approximately constant. Therefore, in region 20C, the spacing P of the linkage mechanisms 11 on the membrane side of linkage 10L is approximately constant, and thus, the spacing of the membrane holding portions 21 on the membrane side of linkage 10L is also approximately constant. As a result, in region 20C, the membrane 8 is not stretched in the MD direction. That is, in region 20C, the membrane 8 is not stretched in either the TD or MD directions.

[0073] As described above, in region 20A, the spacing P of the linkage mechanisms 11 on the membrane side of linkage device 10R remains constant, and the spacing P of the linkage mechanisms 11 on the membrane side of linkage device 10L also remains constant. Then, in region 20B, the spacing P of the linkage mechanisms 11 on the membrane side of linkage device 10R and the spacing P of the linkage mechanisms 11 on the membrane side of linkage device 10L gradually increase. Then, in region 20C, the spacing P of the linkage mechanisms 11 on the membrane side of linkage device 10R remains constant, and the spacing P of the linkage mechanisms 11 on the membrane side of linkage device 10L also remains constant.

[0074] Therefore, on the membrane side of each of the linkage devices 10R and 10L, the spacing P of the linkage mechanisms 11 in region 20C is greater than the spacing P of the linkage mechanisms 11 in region 20A. From another perspective, on the membrane side of each of the linkage devices 10R and 10L, the spacing of the membrane holding portions 21 in region 20C is greater than the spacing of the membrane holding portions 21 in region 20A. From yet another perspective, on the membrane side of each of the linkage devices 10R and 10L, the interval L1 between the tracks 13 and 14 in region 20C is smaller than the interval L1 between the tracks 13 and 14 in region 20A. In this way, the stretching action of the stretching device 5 is performed.

[0075] <Research on Improvement>

[0076] For example, in Figure 3 In regions 20A, 20B and 20C shown, the membrane 8 is held by the membrane holding part 21 provided by the linkage mechanism 11.

[0077] Figure 4 This is a schematic diagram showing the linkage mechanism that is holding the membrane.

[0078] exist Figure 4In this design, the linkage mechanism 11 has a membrane holding portion 21 for holding the membrane 8, and a guide plate support roller 25 is provided on the membrane holding portion 21. Furthermore, the linkage mechanism 11 is arranged on a pair of tracks 13 and 14 for traveling on the linkage mechanism 11, and has traveling guide rollers 30A and 30B that are in contact with and rotatable on the tracks 13, and traveling guide rollers 30C and 30D that are in contact with and rotatable on the tracks 14. The linkage mechanism 11 also has a connecting shaft 40B connected to the membrane holding portion 21 and a connecting shaft 40A connected to the connecting shaft 40B. Specifically, the connecting shaft 40A and the connecting shaft 40B are connected by a lower connecting plate 50C and an upper connecting plate 50 (50A, 50B).

[0079] The linkage mechanism 11 constructed in this manner, for example, is located in Figure 3 The membrane 8 is held at the inlet (inlet) on the left side of region 20A, where the membrane 8 is located. Figure 3 The membrane 8 on the right side of the area 20C shown is unloaded from the linkage mechanism 11 at the outlet (exit).

[0080] Figure 5 This diagram illustrates the release action of the membrane holding part, which involves the action of holding the membrane by the linkage mechanism and the action of unloading the membrane from the linkage mechanism.

[0081] like Figure 5 As shown, in the linkage mechanism 11, for example, the membrane holding portion 21 is opened by pressing the guide plate 60 against the guide plate support roller 25 provided on the membrane holding portion 21. Furthermore, when the membrane is held by the linkage mechanism 11, the membrane is held by the membrane holding portion 21 by performing an action of clamping the membrane into the opened membrane holding portion 21. On the other hand, when the membrane is removed from the linkage mechanism 11, the membrane holding portion 21 is opened to release the clamping of the membrane, and the membrane is removed from the membrane holding portion 21.

[0082] Here, as Figure 5 As shown, when the guide plate 60 is pressed against the guide plate support roller 25 provided on the membrane holding part 21, the membrane holding part 21 opens. However, since the pressing force of the guide plate 60 is applied at a position far from the center line of the linkage mechanism 11, the linkage mechanism 11 generates a torque caused by the pressing force of the guide plate 60. As a result, as Figure 5 As shown, under the action of torque, a warping occurs on the side of the linkage mechanism 11 (linkage shaft 40A side) opposite to the centerline of the membrane holding part 21.

[0083] If such a tilting occurs in the linkage 11, the linkage 11 may detach from the pair of tracks 13 and 14 and derail. Therefore, in order to prevent the derailment of the linkage 11, measures are desired to suppress the tilting of the linkage 11.

[0084] <Explanation of Related Technologies>

[0085] Therefore, as a technique to prevent the linkage mechanism 11 from tilting when the membrane holding part 21 is opened by the guide plate 60, the following related techniques are available, for example.

[0086] The “related technology” referred to in this specification is not a publicly known technology, but rather a technology that addresses a problem discovered by the inventors of this application and serves as a premise for the invention of this application.

[0087] Figure 6 This is a diagram illustrating the structure of a linkage mechanism in linkage technology.

[0088] exist Figure 6 In the linkage mechanism 11A, a linkage pressing part 70 is disposed above the upper linkage plate 50. This linkage pressing part 70 is, for example, disposed above the upper linkage plate 50 located at... Figure 3 The area extends from the inlet of membrane 8 on the left side of region 20A to the outlet of membrane 8 located on the right side of regions 20A, 20B, 20C, and 20C. Furthermore, as shown... Figure 6 As shown, the linkage mechanism 11A is provided with a sliding member 80 fixed to the upper linkage plate 50. Therefore, even if a torque is generated in the linkage mechanism 11A due to the pressing force of the guide plate, the sliding member 80 and the linkage pressing part 70 will still contact due to the torque. As a result, the tilting of the linkage mechanism 11 caused by the guide plate opening the membrane holding part 21 is suppressed.

[0089] In particular, at the inlet of membrane 8 located on the left side of region 20A and the outlet of membrane 8 located on the right side of region 20C, the sliding member 80 contacts the connecting rod pressing part 70, thereby suppressing the tilting of the linkage mechanism 11 caused by the torque generated when the membrane holding part 21 is opened. On the other hand, in regions 20A, 20B, and 20C, the sliding member 80 contacts the connecting rod pressing part 70, thereby suppressing the derailment of the linkage mechanism 11A traveling on a pair of tracks 13 and 14. It should be noted that during normal travel of the linkage mechanism 11A, a small gap exists between the sliding member 80 and the connecting rod pressing part 70 to reduce travel resistance.

[0090] According to the linkage technology constructed in this way, it is possible to suppress the lifting of the linkage mechanism 11A. On the other hand, there is room for improvement in the following aspects. That is, in the linkage technology, a sliding member 80 is provided to suppress the lifting of the linkage mechanism 11A. This sliding member 80 is usually made of materials such as brass or carbon, but these materials are prohibited for use in linkage devices. In addition, when the linkage mechanism 11A travels, the sliding member 80 contacts the linkage pressing part 70, but in the linkage technology, since the contact method between the sliding member and the linkage pressing part is "sliding", the risk of generating wear powder is increased. In other words, in the linkage technology, there is room for improvement from the viewpoint of improving the performance of the linkage device including the linkage mechanism 11A. Therefore, in this embodiment 1, the room for improvement in the linkage technology is studied. In this regard, firstly, as a measure to address the room for improvement in the linkage technology, the inventors of this application will explain a new insight discovered by them.

[0091] <New insights discovered by the inventors of this application>

[0092] Figure 7 This is a diagram illustrating the new insights discovered by the inventors of this application.

[0093] exist Figure 7 In this application, the inventors have made a novel insight: instead of the "sliding member 80" in the related technology, a rotatable roller 90 is provided on the upper connecting rod plate 50. According to this insight, the roller 90 contacts the connecting rod pressing portion 70, suppressing the lifting of the connecting rod mechanism 11B. Here, the roller 90 can be made, for example, of bearing steel made from a non-prohibited material. Furthermore, when the connecting rod mechanism 11B travels, the roller 90 contacts the connecting rod pressing portion 70, but the contact method between the roller 90 and the connecting rod pressing portion 70 is "rolling (the contact method between the rotating roller 90 and the connecting rod pressing portion 70)," thus reducing the risk of generating abrasive powder compared to the related technology using the "sliding member 80." In other words, according to this insight, it is believed that the performance of the connecting rod device including the connecting rod mechanism 11B can be improved.

[0094] However, after research, the inventors of this application discovered that there are issues that need to be overcome when the roller 90 is used as the component that contacts the connecting rod pressing part 70, and therefore, these issues need to be overcome are explained.

[0095] <Issues to be overcome>

[0096] Figure 8 (a) is a diagram showing the closed state of the linkage mechanism.

[0097] exist Figure 8In (a), the "closed state" of linkage 11B is the state in which the lower connecting plate 50C and the upper connecting plate 50 are folded, defined as the state in which the angle between the lower connecting plate 50C and the upper connecting plate 50 is an acute angle close to 0 degrees. In other words, the "closed state" of linkage 11B is the state in which the configuration direction of connecting shafts 40A and 40B intersects the extension direction of rails 13 and 14.

[0098] In the "closed state" of the linkage mechanism 11B, the distance between the membrane holding parts 21 of adjacent linkage mechanisms 11B is the smallest.

[0099] Furthermore, in the "closed state" of the aforementioned linkage mechanism 11B, such as Figure 8 As shown in (a), the rotation axis of roller 90 is orthogonal to the extension directions of track 13 and track 14.

[0100] As a result, when the linkage mechanism 11B travels on the tracks 13 and 14, even if the roller 90 contacts the connecting rod pressing part (not shown), the contact between the roller 90 and the connecting rod pressing part is "rolling", thus reducing the risk of generating abrasive powder.

[0101] Next, Figure 8 (b) is a diagram showing the open state of the linkage mechanism.

[0102] exist Figure 8 In (b), the "open state" of linkage 11B is the state where the lower connecting plate 50C and the upper connecting plate 50 are open, defined as the state where the angle between the lower connecting plate 50C and the upper connecting plate 50 is close to 180 degrees. In other words, the "open state" of linkage 11B is the state where the configuration direction of connecting shafts 40A and 40B is parallel to the extension direction of rails 13 and 14.

[0103] When the linkage mechanism 11B is in the "open state", the distance between the membrane holding parts 21 of adjacent linkage mechanisms 11B is at its maximum.

[0104] However, in the "open state" of the aforementioned linkage mechanism 11B, such as Figure 8 As shown in (b), the rotation axis of roller 90 is not orthogonal to the extending directions of track 13 and track 14. That is, as Figure 8 As shown in (a), if the roller 90 is fixed to the upper connecting plate 50 in such a way that the rotation axis of the roller 90 is orthogonal to the extension direction of the track 13 and the track 14 when the linkage mechanism 11B is in the "closed state", then when the linkage mechanism 11B is in the "open state", the angle between the upper connecting plate 50 and the lower connecting plate 50C changes, and thus the rotation axis of the roller 90 is not orthogonal to the extension direction of the track 13 and the track 14.

[0105] Therefore, when the linkage mechanism 11B is in the "open state" and it travels on the track 13 and track 14, if the roller 90 contacts the connecting rod pressing part (not shown), the contact mode between the roller 90 and the connecting rod pressing part is "sliding" rather than "rolling", thus failing to reduce the risk of generating abrasive powder.

[0106] Therefore, in the configuration of the upper connecting plate 50 with a rotatable roller 90, in either the "closed state" or the "open state" of the connecting mechanism 11B, the rotation axis of the roller 90 is not orthogonal to the extension direction of the track 13 and the track 14. Therefore, in both the "closed state" and the "open state" of the connecting mechanism 11B, it is not possible to set the contact mode between the roller 90 and the connecting rod pressing part to "rolling".

[0107] Therefore, after in-depth research, the inventors of this application came up with the following technical idea: instead of fixing the rotatable roller 90 to the upper connecting rod plate 50, they focused on the method of fixing the roller so that the contact mode between the roller and the pressing part of the connecting rod can be set to "rolling" in both the "closed state" and the "open state" of the connecting rod mechanism.

[0108] The following explains the technical concept of this embodiment 1 obtained through this research.

[0109] <The structure of the linkage mechanism in Implementation Method 1>

[0110] Figure 9 This is a perspective view schematically illustrating the structure of the linkage mechanism in Embodiment 1. In particular, Figure 9 (a) is a perspective view showing the "closed state" of the linkage mechanism in Embodiment 1. Figure 9 (b) is a perspective view showing the "open state" of the linkage mechanism in Embodiment 1.

[0111] Figure 10 This is a diagram illustrating the linkage mechanism in Embodiment 1.

[0112] exist Figure 10 In this design, the linkage mechanism 11C has a membrane holding portion 21 for holding the membrane, and the membrane holding portion 21 is provided with a guide plate support roller 25. Furthermore, the linkage mechanism 11C is arranged on a pair of tracks 13 and 14 for traveling on the linkage mechanism 11C, and has traveling guide rollers 30A and 30B that contact and rotate with the tracks 13, and traveling guide rollers 30C and 30D that contact and rotate with the tracks 14. The linkage mechanism 11C also has a connecting shaft 40B connected to the membrane holding portion 21, and a connecting shaft 40A connected to the connecting shaft 40B. Specifically, the connecting shaft 40A and the connecting shaft 40B are connected by a lower connecting plate 50C and an upper connecting plate 50.

[0113] Furthermore, an "L-shaped" bracket 100A fixed to the connecting rod shaft 40A is provided on the upper connecting rod plate 50, and a roller 110A that can contact the connecting rod pressing part 70 is installed on the bracket 100A.

[0114] Similarly, an "L-shaped" bracket 100B fixed to the connecting rod shaft 40B is provided on the upper connecting rod plate 50, and a roller 110B that can contact the connecting rod pressing part 70 is installed on the bracket 100B.

[0115] The linkage mechanism 11C in this embodiment 1 is constructed in the manner described above.

[0116] <Features in Implementation Method 1>

[0117] Next, the feature points in this embodiment 1 will be explained.

[0118] For example, such as Figure 10 As shown, a key feature of this embodiment 1 is that the linkage mechanism 11C has a roller 110A mounted on a bracket 100A fixed to the linkage shaft 40A, and a roller 110B mounted on a bracket 100B fixed to the linkage shaft 40B. That is, for example, as... Figure 7 As shown, a key feature of this embodiment 1 is that rollers (110A, 110B) capable of contacting the connecting rod pressing part 70 are provided on the brackets (100A, 100B) fixed to the connecting rod shafts (40A, 40B), instead of rollers 90 capable of contacting the connecting rod pressing part 70 being provided on the upper connecting rod plate 50. Therefore, according to this embodiment 1, in either the "closed state" or the "open state" of the connecting rod mechanism 11C, the rotation axes of rollers 110A and 110B can be configured such that their respective rotation axes are orthogonal to the extension directions of the tracks 13 and 14.

[0119] As a result, in both the "closed state" and "open state" of the linkage mechanism 11C, the contact mode between rollers 110A and 110B and the linkage pressing part 70 can be set to "rolling". Therefore, according to this embodiment, the generation of abrasive powder can be reduced.

[0120] The following explains, based on the configuration of the linkage mechanism 11C, that in either the "closed state" or the "open state" of the linkage mechanism 11C, the rotation axes of rollers 110A and 110B are orthogonal to the extension directions of tracks 13 and 14.

[0121] Figure 11 (a) is a diagram showing the closed state of the linkage mechanism.

[0122] exist Figure 11In (a), the "closed state" of linkage 11C is the state in which the lower connecting plate 50C and the upper connecting plate 50 are folded together, defined as a state in which the angle between the lower connecting plate 50C and the upper connecting plate 50 is an acute angle close to 0 degrees. In other words, the "closed state" of linkage 11C is the state in which the configuration directions of adjacent connecting shafts 40A and 40B intersect the extension directions of rails 13 and 14. Furthermore, in the "closed state" of linkage 11C, as... Figure 11 As shown in (a), the connecting rod shaft 40A is positioned above the track 13, while the connecting rod shaft 40B is positioned offset from either the track 13 or the track 14.

[0123] In the "closed state" of the linkage mechanism 11C constructed in this manner, the spacing between the membrane holding portions 21 of adjacent linkage mechanisms 11B is minimized.

[0124] Furthermore, in the "closed state" of the aforementioned linkage mechanism 11C, such as Figure 11 As shown in (a), the rotation axes of rollers 110A and 110B are orthogonal to the extension directions of tracks 13 and 14 (the extension directions of a pair of tracks).

[0125] As a result, when the linkage mechanism 11C travels on the tracks 13 and 14, even if the rollers (110A, 110B) contact the connecting rod pressing part (not shown), the contact between the rollers (110A, 110B) and the connecting rod pressing part is "rolling", thus reducing the risk of generating abrasive powder.

[0126] Next, Figure 11 (b) is a diagram showing the open state of the linkage mechanism.

[0127] exist Figure 11 In (b), the "open state" of linkage 11C is the state where the lower connecting plate 50C and the upper connecting plate 50 are open, defined as a state where the angle between the lower connecting plate 50C and the upper connecting plate 50 is close to 180 degrees. In other words, the "open state" of linkage 11C is the state where the configuration direction of adjacent connecting shafts 40A and 40B is parallel to the extension direction of rails 13 and 14. Furthermore, in the "closed state" of linkage 11C, as... Figure 11 As shown in (b), connecting rod shaft 40A and connecting rod shaft 40B are each positioned above track 13.

[0128] In the "open state" of the linkage mechanism 11C constructed in this way, the distance between the membrane holding portions 21 of adjacent linkage mechanisms 11C is at its maximum.

[0129] Furthermore, in the "open state" of the aforementioned linkage mechanism 11C, such as Figure 11 As shown in (b), the rotation axes of rollers 110A and 110B are also orthogonal to the extension directions of tracks 13 and 14 (the extension directions of the pair of tracks). The reason for this is that in the linkage mechanism 11C of this embodiment 1, rollers 110A and 110B are not fixed to the upper connecting rod plate 50, but roller 110A is fixed to the connecting rod shaft 40A by means of bracket 100A, and roller 110B is fixed to the connecting rod shaft 40B by means of bracket 100B.

[0130] For example, if rollers 110A and 110B are fixed to the upper connecting plate 50, then in the "open state" of the connecting mechanism 11C, due to the change in the angle between the upper connecting plate 50 and the lower connecting plate 50C, the rotation axes of rollers 110A and 110B are not orthogonal to the extension directions of the track 13 and the track 14.

[0131] In contrast, in this embodiment 1, rollers 110A and 110B are not fixed to the upper connecting rod plate 50. Instead, roller 110A, which can contact the connecting rod pressing part 70, is fixed to the bracket 100A fixed to the connecting rod shaft 40A, and roller 110B, which can contact the connecting rod pressing part 70, is fixed to the bracket 100B fixed to the connecting rod shaft 40B. Thus, according to the connecting rod mechanism 11C, it is configured to be unaffected by the change in the angle between the upper connecting rod plate 50 and the lower connecting rod plate 50C. Not only in the "closed state" of the connecting rod mechanism 11C, the rotation axes of rollers 110A and 110B are orthogonal to the extension directions of the tracks 13 and 14, but also in the "open state". Therefore, based on the feature points in Embodiment 1, the contact mode between rollers 110A and 110B and the connecting rod pressing part 70 can be set to "rolling" in both the "closed state" and "open state" of the linkage mechanism 11C. Thus, according to Embodiment 1, the generation of abrasive powder can be reduced.

[0132] <Advantages of Linkage Mechanism 11C>

[0133] The linkage mechanism 11C has the following advantages.

[0134] That is, for example, such as Figure 11 (a) and Figure 11As shown in (b), in either the "closed state" or the "open state" of the linkage mechanism 11C, the angles formed by the membrane holding portion 21 of the linkage mechanism 11C with the track 13 and each of the track 13 are right angles. Therefore, according to the linkage mechanism 11C, the application of "torsion" to the membrane held by the linkage mechanism 11C is suppressed. In other words, according to the linkage mechanism 11C, since no "torsion" is applied to the membrane in either the "closed state" or the "open state" of the linkage mechanism 11C, the advantage of suppressing membrane rupture due to "torsion" can be obtained.

[0135] Therefore, the linkage mechanism 11C can effectively suppress the membrane from breaking due to "torsion", and thus can be effectively applied to the stretching of acrylic membranes and nylon membranes that are prone to breakage.

[0136] <Membrane Manufacturing Method>

[0137] Next, a method for manufacturing a film using a stretching device having a linkage mechanism 11C will be described. Specifically, for example, as Figure 10 As shown, the linkage mechanism 11C includes: a membrane holding part 21 configured to move on a pair of tracks (tracks 13 and 14) and hold the membrane; a linkage shaft (40A, 40B) connected to the membrane holding part 21; brackets (100A, 100B) fixed to the linkage shafts (40A, 40B); and rollers (110A, 110B) mounted on the brackets (100A, 100B) and capable of contacting the linkage pressing part 70. Furthermore, using a stretching device having the linkage mechanism 11C configured in this manner, the membrane is stretched while being held.

[0138] Figure 12 This is a flowchart illustrating the membrane manufacturing process.

[0139] exist Figure 12 First, after the membrane is held by the membrane holding part 21 of the linkage mechanism 11C (S101), the linkage mechanism 11C holding the membrane is moved along a pair of tracks (track 13 and track 14) in... Figure 3 The membrane is stretched by traveling through regions 20A, 20B and 20C shown (S102).

[0140] Here, Figure 13 This is a flowchart illustrating an example of the process of holding the membrane.

[0141] exist Figure 13 First, the guide plate 60 is pressed against the guide plate support roller 25 of the membrane holding part 21 of the linkage mechanism 11C (see...). Figure 5 (S201). Thus, for example, Figure 5As shown, the membrane holding part 21 is opened (S202). In this state, the membrane is clamped into the opened membrane holding part 21 (S203). As a result, the membrane can be held by the membrane holding part 21 of the linkage mechanism 11C.

[0142] At this time, since the guide plate 60 is pressed against the film holding part 21 (S201 and S202), the linkage mechanism 11C generates torque. As a result, a lifting force acts on the linkage mechanism 11C. However, in this embodiment, the linkage mechanism 11C is provided with rollers (110A, 110B) fixed to the linkage shafts (40A, 40B) by means of brackets (100A, 100B). These rollers 110A and 110B contact the linkage pressing part 70, thus suppressing the lifting of the linkage mechanism 11C caused by the torque. Furthermore, even if the linkage mechanism 11C... Figure 3 Within the areas 20A, 20B, and 20C shown, rollers 110A and 110B travel on a pair of tracks, and their respective rotation axes remain orthogonal to the extending directions of tracks 13 and 14. Therefore, even when rollers 110A and 110B contact the connecting rod pressing part 70 during travel in the connecting rod mechanism 11C, the contact mode between rollers 110A and 110B and the connecting rod pressing part 70 can be set to "rolling" in both the "closed state" and the "open state." Thus, according to the membrane manufacturing method of this embodiment, the generation of abrasive powder can be reduced.

[0143] In this way, by employing the linkage mechanism 11C with the characteristic points of this embodiment, it is possible to improve the performance of the linkage device, and furthermore, the stretching device, and improve the quality of the membrane manufactured using the stretching device.

[0144] (Implementation Method 2)

[0145] In this second embodiment, an example is described in which the technical concept of the first embodiment is applied to a linkage mechanism with a different structure than the linkage mechanism 11C described in the first embodiment.

[0146] <Aspects for Improvement>

[0147] Figure 14 This is a diagram showing one configuration example of a linkage mechanism.

[0148] exist Figure 14 In the linkage mechanism 11D, the linkage shaft 40A is positioned above the track 13, and the linkage shaft 40B is positioned above the track 14, which is similar to, for example... Figure 7The linkage mechanism 11B shown is different. Specifically, in this linkage mechanism 11D, in either the "closed" or "open" state, the link shaft 40A is positioned on the track 13 and the link shaft 40B is positioned on the track 14. In this respect, the linkage mechanism 11D differs from, for example, the linkage mechanism 11B shown. Figure 7 The linkage mechanism 11B shown is different from the linkage shaft 40B, which is positioned above the track 13 and above the track 14.

[0149] Here, Figure 14 The linkage mechanism 11D shown is also related to Figure 7 Similarly, in the linkage mechanism 11B shown, a rotatable roller 90 is fixed to the upper linkage plate 50. In this case, since the contact between the roller 90 and the linkage pressing part 70 is "rolling", the risk of generating abrasive powder can be reduced compared to the associated technology using a "sliding part 80".

[0150] However, there is room for improvement in the linkage mechanism 11D as described in the "Aspects to be Overcome", so this will be explained below.

[0151] Figure 15 (a) is a diagram showing the closed state of the linkage mechanism.

[0152] exist Figure 15 In (a), the "closed state" of linkage 11D is the state in which the lower connecting plate 50C and the upper connecting plate 50 are folded, defined as an acute angle between the lower connecting plate 50C and the upper connecting plate 50 that is close to 0 degrees. In the "closed state" of linkage 11D, connecting shaft 40A is positioned above track 13, and connecting shaft 40B is positioned above track 14.

[0153] In the "closed state" of the linkage mechanism 11D, the distance between the membrane holding parts 21 of adjacent linkage mechanisms 11D is the smallest.

[0154] Furthermore, in the "closed state" of the aforementioned linkage mechanism 11D, such as Figure 11 As shown in (a), the rotation axis of roller 90 is orthogonal to the extension directions of track 13 and track 14.

[0155] As a result, when the linkage mechanism 11D travels on the tracks 13 and 14, even if the roller 90 contacts the connecting rod pressing part (not shown), the risk of generating abrasive powder is reduced because the contact between the roller 90 and the connecting rod pressing part is "rolling".

[0156] Next, Figure 15 (b) is a diagram showing the open state of the linkage mechanism.

[0157] exist Figure 15In (b), the “open state” of the linkage mechanism 11D is the state in which the lower linkage plate 50C and the upper linkage plate 50 are open, defined as the state in which the angle between the lower linkage plate 50C and the upper linkage plate 50 is close to 90 degrees.

[0158] like Figure 15 As shown in (b), in the linkage 11D, not only in the "closed state" but also in the "open state", the linkage shaft 40A is positioned above the track 13, and the linkage shaft 40B is positioned above the track 14.

[0159] When the linkage mechanism 11D is in the "open state", the distance between the membrane holding parts 21 of the adjacent linkage mechanisms 11B is at its maximum.

[0160] However, in the "open state" of the aforementioned linkage mechanism 11D, such as Figure 15 As shown in (b), the rotation axis of roller 90 is not orthogonal to the extending directions of track 13 and track 14. That is, as Figure 15 As shown in (a), if the roller 90 is fixed to the upper connecting plate 50 in the "closed state" of the linkage mechanism 11D such that the rotation axis of the roller 90 is orthogonal to the extension direction of the track 13 and the track 14, then in the "open state" of the linkage mechanism 11D, due to the change in the angle between the upper connecting plate 50 and the lower connecting plate 50C, the rotation axis of the roller 90 is not orthogonal to the extension direction of the track 13 and the track 14.

[0161] Therefore, when the linkage mechanism 11D is in the "open state" and it travels on the track 13 and track 14, if the roller 90 contacts the connecting rod pressing part (not shown), the contact mode between the roller 90 and the connecting rod pressing part is not "rolling" but "sliding". Therefore, the risk of generating wear powder cannot be reduced.

[0162] Therefore, in the linkage mechanism 11D, if the rotatable roller 90 is fixed to the upper connecting plate 50, then in either the "closed state" or the "open state" of the linkage mechanism 11D, the rotation axis of the roller 90 is not orthogonal to the extension direction of the track 13 and the track 14. Therefore, in both the "closed state" and the "open state" of the linkage mechanism 11D, it is impossible to set the contact mode between the roller 90 and the connecting rod pressing part to "rolling".

[0163] Therefore, in this second embodiment, the same measures as in the first embodiment are adopted.

[0164] <Features in Implementation Method 2>

[0165] For example, such as Figure 16As shown, the feature of this embodiment 2 is that the linkage mechanism 11E has a roller 110A mounted on a bracket 100A fixed to the linkage shaft 40A, and a point mounted on a roller 110B mounted on a bracket 100B fixed to the linkage shaft 40B.

[0166] Therefore, in this embodiment 2, it is also possible to configure the rotation axes of rollers 110A and 110B to be orthogonal to the extension directions of tracks 13 and 14 in either the "closed state" or "open state" of the linkage mechanism 11E.

[0167] The following explains how, based on the configuration of the linkage mechanism 11E, in either the "closed state" or the "open state" of the linkage mechanism 11E, the rotation axes of rollers 110A and 110B can be made orthogonal to the extension directions of tracks 13 and 14.

[0168] Figure 17 (a) is a diagram showing the closed state of the linkage mechanism.

[0169] exist Figure 17 In (a), the distance between the membrane holding portions 21 of adjacent linkage mechanisms 11E is the smallest when the linkage mechanism 11E is in the "closed state".

[0170] Furthermore, in the "closed state" of linkage mechanism 11E, such as Figure 17 As shown in (a), the rotation axes of rollers 110A and 110B are orthogonal to the extension directions of tracks 13 and 14 (the extension directions of a pair of tracks).

[0171] As a result, when the linkage mechanism 11E travels on the tracks 13 and 14, even if the rollers (110A, 110B) come into contact with the connecting rod pressing part (not shown), the contact between the rollers (110A, 110B) and the connecting rod pressing part becomes "rolling", which reduces the risk of generating abrasive powder.

[0172] Next, Figure 17 (b) is a diagram showing the open state of the linkage mechanism.

[0173] exist Figure 17 In (b), when the linkage mechanism 11E is in the "open state", the distance between the membrane holding parts 21 of the adjacent linkage mechanisms 11C is the largest.

[0174] Furthermore, in the "open state" of linkage mechanism 11E, it is also as follows: Figure 17As shown in (b), the rotation axes of rollers 110A and 110B are orthogonal to the extension directions of tracks 13 and 14 (the extension directions of the pair of tracks). The reason for this is that, even in the linkage mechanism 11E of this embodiment 2, rollers 110A and 110B are not fixed to the upper linkage plate 50. Instead, roller 110A is fixed to the linkage shaft 40A by means of bracket 100A, and roller 110B is fixed to the linkage shaft 40B by means of bracket 100B.

[0175] For example, if rollers 110A and 110B are fixed to the upper connecting plate 50, then in the "open state" of the linkage mechanism 11E, due to the change in the angle between the upper connecting plate 50 and the lower connecting plate 50C, the rotation axes of rollers 110A and 110B are not orthogonal to the extension directions of the track 13 and the track 14.

[0176] In contrast, in this embodiment 2, rollers 110A and 110B are not fixed to the upper connecting rod plate 50. Instead, roller 110A, which can contact the connecting rod pressing part 70, is fixed to the bracket 100A fixed to the connecting rod shaft 40A, and roller 110B, which can contact the connecting rod pressing part 70, is fixed to the bracket 100B fixed to the connecting rod shaft 40B. Thus, according to the linkage mechanism 11E, it is possible to ensure that the rotation axes of rollers 110A and 110B are orthogonal to the extension directions of the tracks 13 and 14, not only in the "closed state" of the linkage mechanism 11E, but also in the "open state". Therefore, in this embodiment 2, the contact mode between rollers 110A and 110B and the connecting rod pressing part 70 can be set to "rolling" in both the "closed state" and "open state" of the linkage mechanism 11E. Thus, according to this embodiment 2, the generation of abrasive powder can be reduced.

[0177] <Advantages of Linkage Mechanism 11E>

[0178] The linkage mechanism 11E has the following advantages.

[0179] For example, such as Figure 17 (a) and Figure 17 As shown in (b), in the linkage mechanism 11E, the difference between the spacing between adjacent linkage mechanisms 11E in the "closed state" and the spacing between adjacent linkage mechanisms 11E in the "open state" can be set to be large. That is, the linkage mechanism 11E has the advantage of being able to increase the ratio (multiplier) of the spacing in the "closed state" to the spacing in the "open state". In addition, the configuration of the linkage mechanism 11E also has the advantage of low cost. The linkage mechanism 11E with this advantage is used, for example, in the manufacturing process of the separator of a lithium-ion battery.

[0180] The invention proposed by the inventors of this application has been specifically described above based on its implementation methods. However, the invention is not limited to the aforementioned implementation methods, and various modifications can be made without departing from its essence.

[0181] Explanation of reference numerals in the attached figures

[0182] 1 Membrane Manufacturing System

[0183] 2. Extrusion device

[0184] 2a Raw Material Supply Department

[0185] 3 T-shaped mold

[0186] 4. Material roll cooling device

[0187] 5. Tensioning device

[0188] 6. Traction device

[0189] 7. Winding device

[0190] 8. Membrane

[0191] 9. Heat Treatment Department

[0192] 10-linkage device

[0193] 10L linkage device

[0194] 10R Linkage Device

[0195] 11. Linkage Mechanism

[0196] 11A Linkage Mechanism

[0197] 11B Linkage Mechanism

[0198] 11C Linkage Mechanism

[0199] 11D linkage mechanism

[0200] 11E linkage mechanism

[0201] 13 orbits

[0202] 14 orbits

[0203] 15 Sprockets

[0204] 16 sprockets

[0205] 17 Sprocket

[0206] Area 20A

[0207] Area 20B

[0208] 20C area

[0209] 21 Membrane holding section

[0210] 25. Rollers for supporting guide plates

[0211] 30A Travel Guide Roller

[0212] 30B Travel guide roller

[0213] 30C Travel Guide Roller

[0214] 30D Travel Guide Roller

[0215] 40A connecting rod shaft

[0216] 40B connecting rod shaft

[0217] 50 Upper connecting rod plate

[0218] 50A Upper Connecting Rod Plate

[0219] 50B Upper Connecting Rod Plate

[0220] 50C Lower connecting rod plate

[0221] 60 Guide Board

[0222] 70 Linkage Pressing Part

[0223] 80 Sliding parts

[0224] 90 rolls

[0225] 100A bracket

[0226] 100B bracket

[0227] 110A Roller

[0228] 110B roller

Claims

1. A linkage mechanism for a resin film stretching device, characterized in that, include: The membrane holding section holds the resin membrane; The first connecting rod shaft is connected to the membrane holding part; The second connecting rod shaft is connected to the first connecting rod shaft; The lower connecting rod plate connects the first connecting rod shaft and the second connecting rod shaft; The upper connecting rod plate connects the first connecting rod shaft and the second connecting rod shaft; The first bracket is fixed to the first connecting rod shaft; The second bracket is fixed to the second connecting rod shaft; The first roller, mounted on the first bracket, is capable of contacting the pressing part of the connecting rod; and The second roller, which is mounted on the second bracket, is able to contact the pressing part of the connecting rod.

2. The linkage mechanism for the resin film stretching device according to claim 1, characterized in that, The open state of the linkage mechanism is when the first link shaft and the second link shaft are arranged parallel to the extension direction of a pair of tracks. The closed state of the linkage mechanism is the state in which the first linkage shaft and the second linkage shaft are arranged intersecting with the extension directions of a pair of tracks.

3. The linkage mechanism for the resin film stretching device according to claim 2, characterized in that, In either the open or closed state of the linkage mechanism, The rotation axis of the first roller is orthogonal to the extension direction of the pair of tracks. The rotation axis of the second roller is orthogonal to the extension direction of the pair of tracks.

4. The linkage mechanism for the resin film stretching device according to claim 1, characterized in that, One of the first and second connecting rod shafts is positioned above one of the two tracks in either the open or closed state of the linkage mechanism. In the closed state of the linkage mechanism, the other of the first linkage shaft and the second linkage shaft is positioned offset from above a pair of tracks.

5. The linkage mechanism for the resin film stretching device according to claim 1, characterized in that, The first connecting rod shaft is positioned above a track in either the open or closed state of the connecting rod mechanism. The second connecting rod shaft is positioned above the other track in either the open or closed state of the connecting rod mechanism.

6. A resin film stretching device, characterized in that, include: A pair of tracks; as well as A linkage mechanism, which is movable on the pair of tracks and used to hold the resin film, in, The linkage mechanism includes: The membrane holding section holds the membrane; The first connecting rod shaft is connected to the membrane holding part; The second connecting rod shaft is connected to the first connecting rod shaft; The lower connecting rod plate connects the first connecting rod shaft and the second connecting rod shaft; The upper connecting rod plate connects the first connecting rod shaft and the second connecting rod shaft; The first bracket is fixed to the first connecting rod shaft; The second bracket is fixed to the second connecting rod shaft; The first roller, mounted on the first bracket, is capable of contacting the pressing part of the connecting rod; and The second roller, which is mounted on the second bracket, is able to contact the pressing part of the connecting rod.

7. The resin film stretching device according to claim 6, characterized in that, The open state of the linkage mechanism is when the first link shaft and the second link shaft are arranged parallel to the extension direction of the pair of tracks. The closed state of the linkage mechanism is the state in which the first link shaft and the second link shaft are arranged intersecting with the extension directions of the pair of tracks.

8. The resin film stretching device according to claim 7, characterized in that, In either the open or closed state of the linkage mechanism, The rotation axis of the first roller is orthogonal to the extension direction of the pair of tracks. The rotation axis of the second roller is orthogonal to the extension direction of the pair of tracks.

9. The resin film stretching device according to claim 6, characterized in that, One of the first and second connecting rod shafts is positioned above one of the two tracks in either the open or closed state of the linkage mechanism. In the closed state of the linkage mechanism, the other of the first linkage shaft and the second linkage shaft is positioned offset from above the pair of tracks.

10. The resin film stretching device according to claim 6, characterized in that, The first connecting rod shaft is positioned above a track in both the open and closed states of the connecting rod mechanism. The second connecting rod shaft is positioned above the other track in either the open or closed state of the connecting rod mechanism.

11. The resin film stretching device according to any one of claims 6 to 10, characterized in that, The stretching device is a simultaneous biaxial stretching device.

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