Vertical extension device for replacing a wearable assembly and method for replacing a wearable assembly

Abstract

To provide an improved longitudinal stretching device or longitudinal stretching facility, and to provide a method for quickly and easily replacing device components, especially roll.SOLUTION: An improved longitudinal stretching device has, among other things, a ready position (D) and / or a waiting area where another wearable assembly is waiting in addition to an operation position or an action position (A) of the wearable assembly to be replaced. Another wearable assembly prepared in the ready position (D) and / or in the waiting area can already reach or reach an acting temperature or a temperature higher than the acting temperature or at least a preheating temperature that is only 30°C less than the acting temperature before being mounted in the action position (A), the ready position (D) and / or the waiting area are provided and / or installed in the longitudinal stretching device.SELECTED DRAWING: Figure 1b

Description

Technical Field

[0001] The present invention relates to a longitudinal stretching device described in the preamble of claim 1 and a method for replacing a wearable assembly that has been worn by the longitudinal stretching device.

Background Art

[0002] In a longitudinal stretching device for a resin film (plastic film), each subsequent roll rotates at a higher rotational speed or circumferential speed than the preceding roll, and longitudinal stretching of the resin film is performed between a plurality of consecutive rolls. For this reason, the resin film passing through the gap between a pair of consecutive rolls is stretched in the longitudinal direction.

[0003] Using a plurality of pressing rolls or gripping rolls, the moving thin film material, particularly the resin film to be stretched, must be pressed entirely onto the coating of a deflection roll or a processing roll to ensure proper contact of the resin film with each processing roll or deflection roll.

[0004] In subsequent processing steps, the resin film is further introduced into a longitudinal stretching device or longitudinal stretching equipment. First, after stretching the resin film in the longitudinal direction, and then stretching the resin film in the width direction or vice versa, first stretching in the width direction and then subsequently stretching in the longitudinal direction, a longitudinal stretching device can be configured as part of a sequential stretching device.

[0005] The resin film to be stretched is supplied through a plurality of rolls that are heated, so that the resin film is heated to an appropriate stretching temperature and the resin film is stretched in the longitudinal direction. At this time, since each subsequent roll rotates at a roll speed higher than that of the preceding roll, stretching in the longitudinal direction, that is, longitudinal stretching in the longitudinal direction (also abbreviated as MD), is performed.

[0006] During the operation of the longitudinal stretching device, a plurality of components provided in the longitudinal stretching device, such as processing rolls and / or pressing rolls, are subject to non-negligible wear by the frictionally contacting conveyed resin thin film. In particular, the surface of the rolls that are prone to wear may have an adverse effect on the surface quality of the stretched resin thin film. Therefore, a plurality of worn components, in particular, a plurality of rolls (i.e., processing rolls and / or pressing rolls) must be replaced.

[0007] The more complex or expensive the mounting structure or specific fixing mechanism (e.g., the type of roll bearing), the more expensive the components and the more complex the structure for removing the components to be replaced and mounting the newly adopted components (in particular, rolls).

[0008] The removal operation of the components / rolls to be replaced, i.e., the rolls, which are connected to adjacent assembled parts and components, such as the heating part of the roll, the piping provided for heating purposes, and the rotary through conductors such as pressure sealing heads, etc., becomes particularly complicated. The corresponding rolls connected to the electric motor and / or gears and / or couplings and / or articulated shafts also make the entire device more complex, and all relevant parts must be loosened or removed to remove the replacement parts. Furthermore, after installing the new parts, especially after fitting the newly used rolls, the device must be reassembled, and the parts must be connected and fixed again.

[0009] Also, when installing the assembled parts adjacent to the replacement unit in a specific form, the structure of the assembled parts becomes even more complicated. For example, at the corresponding position between the roll preceding and the roll following in the drawing direction of the resin thin film with respect to the roll device, the components / rolls or the roll device must be accurately replaced.

[0010] The disadvantages of the prior art are listed as follows. · The removal of the components / rolls to be replaced is very expensive and time-consuming. · Separating the components to be replaced from existing connection parts such as the pneumatic system, heating devices (especially the hot water pipes leading hot water below 130°C), and electrical connection lines is also similarly expensive and time-consuming. · At the time of installation, the component parts need to be newly connected. In particular, the connection of the hot water pipes (re-filling and de-airing are required for removing the sealed air during installation) and the connection methods of the pneumatic pipes and electric wires also become complicated. · Further, in the vertical stretching device or vertical stretching equipment, the mutual arrangement relationship of the rolls arranged upstream in the drawing direction and the subsequent component parts to be attached or the new component parts or rolls to be attached to the rolls (for example, the parallelism of the cooperating rolls such as the processing roll and the pressing roll in particular) needs to be accurately adjusted and installed. · Finally, before starting the operation of the device again, it is necessary to conduct a functional test to confirm the accurate connection and coupling of all pipes.

Summary of the Invention

Problems to be Solved by the Invention

[0011] Therefore, the problems of the present invention are to provide an improved vertical stretching device or vertical stretching equipment and to provide a method for quickly and simply replacing the device component parts, particularly the rolls.

Means for Solving the Problems

[0012] The problems of the present invention regarding the vertical stretching device are solved by the features described in claim 1, and the problems of the present invention regarding the replacement method of the wearable assembly are solved by the features described in claim 13. Advantageous embodiments of the present invention are described in the dependent claims. The term "wearable assembly" used in this specification means an assembly including rolls that may wear in contact with the resin thin film to be conveyed.

[0013] By the solution means of the present invention, the component parts, particularly the rolls, can be simply replaced. Without the need for a detailed instruction manual, the replacement method according to the present invention can be executed by an obvious replacement method and an obvious implicit operation method, so the simple replacement is particularly effective for untrained persons.

[0014] Due to the good operability, handleability, established working procedures and suitable predetermined processes of the wearable assembly of the present invention, the time for replacing the wearable assembly can be significantly shortened and saved.

[0015] Finally, the downtime of the longitudinal stretching device can be shortened, and the waste time in the resin film production process can be reduced. The higher the frequency of replacing the corresponding consumable assembly or components due to wear, the more important the characteristics of the present invention become.

[0016] The solution of the present invention is particularly characterized by the technique of arranging a consumable assembly to be directly replaced in the longitudinal stretching device or longitudinal stretching equipment. For that purpose, it is preferable to adopt a structure in which a base frame or a base frame part is provided in the longitudinal stretching device, and the consumable assembly is arranged at a preparation position and / or a standby position on the provided base frame or base frame part, and waits for being mounted to an operating position or an operation position.

[0017] It is preferable to provide a preparation position and / or a standby area above the preheating roll constituting the preheating area, and position the consumable assembly at the preparation position and / or the standby area. By using the waste heat generated in the preheating area, the consumable assembly can be heated up or preheated to a desired temperature, for example, within 1 to 2 days.

[0018] In a preferred embodiment of the present invention, by using the roll heating device of the longitudinal stretching device, the consumable assembly can be heated to a desired operating temperature in the preparation stage by a simple heating pipe.

[0019] In an alternative solution of the present invention, the consumable assembly can also be arranged in or adjacent to the longitudinal stretching device or near the longitudinal stretching device. In this case, when heating or maintaining the entire consumable assembly to a desired operating temperature, the waste heat generated in the longitudinal stretching device is insufficient to heat the consumable assembly. When the consumable assembly is arranged on the side or adjacent to the longitudinal stretching device, a structure in which the consumable assembly is connected to the heating device for heating the heating roll of the longitudinal stretching device, for example, through a simply formed heating pipe, warm water is supplied to the consumable assembly arranged on the side or adjacent to the longitudinal stretching device, and the consumable assembly can be sufficiently heated to a desired operating temperature.

[0020] In the present invention, the component parts or the consumable assemblies to be replaced can be easily and quickly removed from the vertical stretching device and replaced with the consumable assemblies that have already been preheated to the operating temperature and are waiting.

[0021] The component parts or the consumable assemblies to be replaced are formed as an assembly or an insertable assembly (cartridge).

[0022] It is preferable to provide a positioning piece that constitutes a positioning device for accurately and fittingly installing the base frame or the assembly frame provided on the consumable assembly on the vertical stretching device on the assembly or the insertable assembly. It is preferable to compensate for and adjust the deformation due to thermal expansion that may occur between the base frame (assembly frame) of the assembly and the base frame or the support frame of the vertical stretching device by the positioning piece that constitutes the positioning device.

[0023] The positioning device has, for example, one end arranged in a transverse direction, particularly a right-angled direction, with respect to the longitudinal direction of the vertical stretching device, and the other end arranged on the opposite side of the one end. A conical structure is formed at the one end, and the other end is formed, for example, with a trapezoidal cross-section. For example, the positioning device formed in a "conical shape" or a "trapezoidal shape" finally accurately positions the consumable assembly (assembly) in the longitudinal direction (MDO) of the stretching device, and compensates for and adjusts the deformation due to thermal expansion based on the temperature change between the two base frames, that is, between the base frame of the consumable assembly and the base frame on the machine side of the vertical stretching device. Therefore, the principle of adjusting the thermal deformation is equivalent to the structure in which a fixed bearing is provided at one end of the component parts to be replaced or the roll to be replaced, and a floating bearing is provided at the other end.

[0024] It is preferable to provide an intermediate position or an intermediate storage area in the vertical stretching device to temporarily store the consumable assembly that is first removed and to be replaced in the intermediate position or the intermediate storage area, so as to further improve the overall replacement efficiency in the replacement process. It is preferable to provide an operating position for attaching the consumable assembly at an intermediate position of the vertical stretching device between the preparation location and the intermediate position.

[0025] As a clearly indicated or coded connecting part, plug and / or quick connector, it is a further improvement of the present invention to form a distributor for connecting heating pipes, pneumatic pipes and / or electric wires, which can be quickly disassembled and assembled as a whole.

[0026] In other words, if the wearable assembly is equipped with a quick replacement device, the attachment and removal of the wearable assembly can be carried out simply, safely and quickly.

[0027] In summary, in the present invention, for example, a plurality of stretching rolls incorporated in the wearable assembly can be surely replaced within several hours (for example, 1 to 2 hours). Usually, at least twice as much time is required to replace the stretching rolls. With the conventional solution, there is a difficulty that the wearable assembly to be replaced is removed from the operating position, another wearable assembly is attached to the operating position, and then it takes at least 1 to 2 hours to heat the wearable assembly to the operating temperature.

[0028] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings show the following matters.

Brief Description of the Drawings

[0029]

Fig. 1a

Fig. 1b

Fig. 1c

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Embodiments for Carrying out the Invention

[0030] FIG. 1a is a schematic side view of a longitudinal stretching device 3 including a plurality of guide rolls and / or a number of rotating rolls 5 called processing rolls. The longitudinal stretching device 3 may also be referred to as a longitudinal stretching facility 3 or a longitudinal stretching machine 3.

[0031] The extruder that extrudes the resin film material provided on the inlet side on the left side of FIG. 1a discharges the melt from a die slot provided in a cooling roll that usually rotates in a water bath. An extruder having a structure without a water bath may also be used. Further, a cooling bath including any coolant (for example, a solvent or a plurality of arbitrary mixtures) can also be used. There is no limitation to a specific cooling method.

[0032] The resin film F that is solidified and / or crystallized in the normal cooling bath shown on the left side of FIG. 1 is supplied to the longitudinal stretching device 3 shown in the center, and then contacts a number of rotating rolls 5 that constitute the preheating stage or preheating region VH of the longitudinal stretching device 3, passes through the rotating rolls 5 while being heated, and is then discharged from the right side of the longitudinal stretching device 3 in FIG. 1. The resin film F that needs to be stretched in a direction transverse to the longitudinal direction of the longitudinal stretching device is further supplied to a transverse stretching device (TDO). Similar to the production of the molten film, the structure and function of the transverse stretching device can refer to known devices and equipment.

[0033] The resin film F that circulates along the outer periphery of the rotating roll 5 along the respective partial winding angles of the plurality of rotating rolls 5 of the longitudinal stretching device 3 contacts the corresponding roll surface 7 or roll coating 8 at the winding angle and is further moved at the corresponding coating rotation speed.

[0034] Each rotating roll 5 heated to the optimum temperature heats the resin thin film F to the optimum stretching temperature and maintains the stretching temperature.

[0035] When heating the resin thin film F by each rotating roll 5 being heated, it is necessary to prevent the capture or mixing of air between the roll surface 7 or the roll jacket 8 of the rotating roll 5 and the resin thin film F, and to make the resin thin film F contact uniformly and surely with the roll surface 7 or the roll jacket 8 of the rotating roll 5.

[0036] The resin thin film F can be surely brought into contact with the roll surface 7 or the roll jacket 8 of the rotating roll 5 by a number of pressing rolls 11, also called nip rolls or sandwiching rolls, provided in the longitudinal stretching device 3.

[0037] When conveying the resin thin film F by driving a pair of rotating rolls such that the subsequent rotating roll in the drawing direction 9 of the pair of continuous rotating rolls has a higher jacket speed than the preceding rotating roll, the resin thin film F is stretched in the longitudinal direction. Therefore, within the free distance between the pair of continuous rotating rolls, the resin thin film F moving through the longitudinal stretching device 3 is stretched in the longitudinal direction.

[0038] FIG. 1a shows the operating position A for attaching a stretching table (stretching stage) 13 including a pair of stretching rolls 6 and a pair of pressing rolls 11. The stretching table 13 includes a plurality of rotating rolls 6, 11, a table frame or assembly frame 15 that rotatably supports the plurality of rotating rolls 6, 11, and a roll assembly (roll module) or exchange assembly 12 that integrally handles and removably holds the plurality of rotating rolls 6, 11 and the assembly frame 15.

[0039] At the preparation position or standby positions D, 19 of the longitudinal stretching device 3 shown in FIG. 1b upstream in the drawing direction 9 of the resin thin film F, another exchange assembly 12 is arranged.

[0040] The assembly 12 is, for example, a consumable item such as a rotating roll that undergoes wear during operation or a wearable assembly 21. In the illustrated embodiment, in order to form a stretching table that stretches the resin thin film F in the longitudinal or transverse direction by utilizing the friction with the roll surface, a plurality of wear marks due to stretching are recognized on the surfaces of the plurality of rolls 6 and the plurality of rolls 11 of the assembly 12 after a certain operating period.

[0041] When removing the assembly 12 having the rotating rolls 6 and 11 whose surfaces are worn from the longitudinal stretching device 3 and replacing it with another assembly, loosen or remove the plurality of quick fasteners and quick connectors that fix the assembly 12, and the assembly can be removed from the operating position A (FIGS. 1a and 1b).

[0042] Next, the removed assembly 12 can be placed at the intermediate position B shown in FIG. 1b above the equipment on the downstream side in the drawing-out direction from the operating position A of the assembly to be replaced. The operating position A from which the assembly 12 has been removed becomes empty. Remove the assembly 12 to be replaced where wear marks are recognized, for example, move it to the intermediate residence position B, and then move the assembly 12 arranged at the preparation position D provided above the longitudinal stretching device 3 upstream in the drawing-out direction to the operating position A, and connect the plurality of quick connectors and quick fasteners so that the assembly 12 is fixed at the operating position A.

[0043] In the embodiment of the present invention, instead of storing a new or usable assembly having an unworn roll surface in a place unrelated to the longitudinal stretching device 3, there is a particularity in that the assembly is arranged above (or inside) the preheating region VH of the longitudinal stretching device 3. In particular, it is preferable to prepare replaceable assemblies at the preparation positions D and 19 above the plurality of rotating rolls in the preheating region VH. The roll surface of the unused rotating roll provided on the new or usable assembly held at the preparation position 19 has already been preheated, for example, by the waste heat generated in the preheating region VH. When the new assembly 12 is attached to the operating position A, the additional operation of heating the plurality of components of the assembly 12 is no longer necessary.

[0044] When connecting the assembly 12 at the preparation positions D and 19 to the heating device provided in the longitudinal extension device 3, it is preferable to connect it with a quick coupler. In other words, by sharing the heating devices provided on the plurality of rotating rolls 5 in the preheating region VH, holding the assembly 12 at the preparation positions D and 19, and connecting the plurality of heating tubes used for heating the plurality of rotating rolls 5 in the preheating region VH to the plurality of rolls 6 to be heated by the heating pipes, this can be easily achieved.

[0045] After removing the assembly 12 having the worn rotating roll from the operating position A and replacing it with a new assembly 12 initially arranged at the preparation positions D and 19, the worn assembly 12 is temporarily stored or arranged at the normal intermediate position or the intermediate region B. The preparation positions D and 19 are arranged upstream of the operating position A in the drawing direction 9 of the resin film F, while the intermediate position or the intermediate region B is arranged downstream of the operating position A particularly in the drawing direction 9 of the resin film F. Thereafter, the worn assembly 12 is taken out from the intermediate position B, and the newly collected and processed assembly 12 is repaired for reuse at another repair position C. The arrow 20 in Fig. 1c indicates the removed state to the repair position C.

[0046] Figs. 2 to 4 show an example of another structural assembly 12 of the worn parts to be replaced.

[0047] The assembly 12 of the illustrated embodiment includes a plurality of pressing rolls 11 and a plurality of heating rolls 6 that cooperate corresponding to the plurality of pressing rolls 11. Two pairs of rolls 6, 11 that contact each other are attached to and held by an assembly frame 15. The assembly frame 15 includes a pair of end walls 15a provided on both side portions of the assembly frame 15, an upper connecting portion 15b provided on the upper portion of each end wall 15a (for example, formed in a rod shape or a crosslinked shape and disposed above the plurality of pressing rolls 11), and a lower connecting portion 15c provided on the lower portion of each end wall 15a (similarly, for example, formed in a rod shape or a crosslinked shape and disposed below the plurality of stretching rolls 6). The upper connecting portion 15b and the lower connecting portion 15c are firmly connected to each other by the two end walls 15a. The plurality of stretching rolls 6 have a functional surface to be replaced when worn. The plurality of pressing rolls 11 include, for example, a roll surface combined with a pressing roll 11 that may be worn. Also, a plurality of pneumatic cylinders 25 for adjusting the positions of the stretching roll 6 and the pressing roll 11 are provided.

[0048] A support 28 provided on the opposite end face of the assembly 12 supports the articulated shaft connection portion 27 shown in FIG. 2 that drives the plurality of heating rolls 6. A plurality of through conductors (particularly, rotary through conductors, feedthroughs) 29 for the heating rolls 6 include pipes 31 (in the form of two heating pipes 31a) that supply a heating medium necessary for heating the heating rolls 6, and are provided on the opposite end face, that is, the front end face in FIG. 3.

[0049] In the illustrated embodiment, the plurality of rotary through conductors 29 and the plurality of downward connecting pieces 33 following the rotary through conductors 29 are connected to the pipes 31 via a plurality of quick connectors 35 for heating provided on the same side.

[0050] FIG. 4 shows a side view of a plurality of pneumatic distributors (pneumatic connection portions) 37 of a pneumatic device that connect or separate pneumatic pipes 38 by a plurality of quick connectors. In the illustrated embodiment, the five pneumatic distributors 37 provided on the assembly frame 15 of the assembly 12 are connected to a plurality of pneumatic cylinders 25 provided on the assembly 12 via five pneumatic pipes 38 (FIG. 4). Of course, the number of the five pneumatic pipes cited as an example can be increased or decreased.

[0051] Figure 4 shows a plurality of electrical distributors 39 used for a plurality of electrical connection parts. On the left and right of the plurality of pneumatic distributors 37 in Figure 4, a plurality of pressure setting devices for a plurality of pressing rolls are shown.

[0052] In particular, it is preferable to adopt a structure in which all connection parts including a plurality of electrical connection parts, a plurality of pneumatic connection parts, and a plurality of heating connection parts are formed by a plurality of quick fasteners or quick connectors to quickly connect and separate corresponding plurality of connection pipes. For a plurality of connection parts and connecting parts, various structures have been conventionally known in various technical fields.

[0053] After removing the used assembly 12 from the operating position A and then attaching another assembly 12 held at the preparation position 19 to the operating position A for use, the entire assembly 12 can be moved to the operating position A and attached thereto together with the base frame or assembly frame 15 (which holds the plurality of rolls 6, 11 and the plurality of pneumatic cylinders 25).

[0054] For example, a conical or hemispherical locking portion 41 serving as a positioning piece shown by a dashed line in Figure 5 is provided at one end of the assembly frame 15, and a locking portion 43 serving as a positioning piece is provided at the other end on the opposite side in the transverse direction of the assembly frame 15. Thus, the relative axial length of the rotating roll in a direction perpendicular or vertical to the drawing direction 9 of the resin film F can be changed, and moreover, the assembly frame 15 can be attached to the assembly 12 in a simple manner. Also, when the assembly frame 15 is arranged at the operating position A, the angular position of the assembly 12 with respect to the assembly frame 15 of the assembly 12 can be automatically self-adjusted by the conical or hemispherical locking portion 41. It is preferable to provide a conical locking portion 41 serving as a positioning piece on the driving side of the stretching roll 6 on the assembly frame 15, and a locking portion 43 serving as a positioning piece in a right-angle direction on the opposite operating side on the assembly frame 15.

[0055] With the conical locking portion 41 (Figure 5), rotation of the assembly frame 15 or the plurality of end walls 15a can be performed about a central axis (perpendicular to the resin film surface) passing through the locking portion 41 to adjust the angular movement. The main purpose of the rotational angle movement adjustment is to easily attach the assembly frame 15 and fix the X direction and the Y direction on the fixed side.

[0056] It is preferable to adjust the length in the direction perpendicular to the drawing direction 9 of the resin thin film F between the assembly frame 15 and the base frame of the longitudinal stretching device (machine) 3 by the locking portion 43 at the opposite end that serves as the positioning piece, and change the length in the transverse direction.

[0057] In the illustrated embodiment, the locking portion 43 that serves as the positioning piece for transverse direction adjustment that moves in the length direction and adjusts the position constitutes a trapezoidal piece 43a with a trapezoidal cross-section having a pair of inclined side surfaces 43b formed facing each other. The inclined side surfaces 43 cooperate with a pair of side pieces or protrusions 47 formed on the base frame at intervals in the drawing direction of the resin thin film F. When the assembly frame 15 is placed on the base frame, the side piece 47 of the base frame slidably contacts relatively with one or the other inclined side surface 43b of the trapezoidal piece 43a that serves as the positioning piece, and the trapezoidal piece 43a that constitutes the positioning piece is arranged between the both side pieces or protrusions 47 by the inclined side surface 43b with as little play as possible or almost no play. The trapezoidal piece 43a that forms the locking portion 43 into a trapezoid enables the assembly frame 15 to be easily arranged and attached to the frame of the longitudinal stretching device 3. It is preferable to firmly attach both the trapezoidal piece 43a that serves as the positioning piece and the conical body 41a to the frame of the longitudinal stretching device 3 and the assembly frame 15 of the assembly body 12. For this purpose, for example, in the form of a hollow cylinder or a side piece 47 that constitutes a plurality of opposing portions formed on the lower surface of each assembly frame 15, a plurality of corresponding positioning pieces and opposing portions that cooperate corresponding to the positioning pieces may be formed reversely on the assembly frame 15 or the frame of the longitudinal stretching device 3.

[0058] In another solution means of the present invention, the exchange assembly body 12 may be arranged in the longitudinal stretching device 3 or in the vicinity thereof. FIG. 7 shows the exchange assembly body 12 arranged in the vicinity of the longitudinal stretching device 3.

[0059] FIG. 7 shows a plan view of the longitudinal stretching device 3 in which the resin thin film moves from the left side to the right side. For example, a standby area 19 for preheating the assembly body 12 for which the replacement preparation is completed can be provided in front 19a, side 19b, or rear 19c of the longitudinal stretching device 3 in the drawing direction of the resin thin film. A standby area 19 may also be provided at the operator side position opposite to the side 19b.

[0060] In the positional relationship between the standby area 19 and the assembly 12 already held in the standby area 19, the amount of waste heat generated by the vertical stretching device 3 is insufficient for the level of heating the entire wearable assembly to a desired operating temperature or maintaining it at the desired operating temperature. Since the replacement assembly 12 is arranged laterally or adjacent to the vertical stretching device 3, it is preferable to heat the replacement assembly 12 by connecting it to a heating device used for heating the heating rolls in the vertical stretching device 3, particularly the heating rotating roll 5 provided in the preheating area VH. In other words, for example, for the replacement assembly 12 arranged laterally or normally adjacent to the vertical stretching device 3, it is sufficient to supply warm water through a simple heating pipe to heat it to the desired operating temperature. It is also possible to naturally heat beside the vertical stretching device 3 by a separate heating device.

Claims

1. A longitudinal stretching device for stretching a resin film longitudinally, comprising a plurality of rotating rolls (5) juxtaposed in the drawing direction (9) of the resin film (F), and at least one abradable assembly (21) that is subject to wear, Some of the plurality of rotating rolls (5) form part of a preheating region (VH), In a longitudinal stretching device, the abradable assembly (21) is arranged removably, replaceably and replaceably with another abradable assembly (21), The longitudinal stretching device comprises an operating position or working position (A) for the abradable assembly (21) to be replaced, and a preparation position (D) and / or a standby region (19) where the abradable assembly (21) waits, The abradable assembly (21) arranged in the preparation position (D) and / or the standby region (19) can reach or be heated to at least a preheating temperature that is already at the operating temperature or higher than the operating temperature or lower than the operating temperature by less than 30°C before being mounted in the operating position (A). The longitudinal stretching device is characterized in that the preparation position (D) and / or the standby region (19) is arranged and / or provided.

2. The longitudinal stretching device according to claim 1, wherein the preparation position (D) and / or the standby region (19) is provided in a position region higher than the plurality of rotating rolls (5) of the longitudinal stretching device.

3. The longitudinal stretching device according to claim 2, wherein the preparation position (D) and / or the standby region (19) is provided in a preheating region (VH) above the plurality of rotating rolls (5) to be heated.

4. The preparation position (D) and / or the standby region (19) of the abradable assembly (21) to be used next is provided on the side of the longitudinal stretching device, The abradable assembly (21) arranged in the preheating region (VH) is connected and connected to a heating pipe device for heating the plurality of rotating rolls (5) via a heating pipe. The longitudinal stretching device according to claim 1.

5. The consumable assembly (21) disposed above the longitudinal stretching device in the preparation position (D) and / or the waiting area (19) is connected and joined via a heating pipe to a heating pipe device that heats a plurality of rotating rolls (5) in the preheating area (VH). The longitudinal stretching device according to claim 1, 2, or 3.

6. The consumable assembly (21) disposed in the operating position (A) and then removed is temporarily disposed in an intermediate residence position (B) that is different from the operating position (A) and the preparation position (D) or is further provided. The longitudinal stretching device according to any one of claims 1 to 5.

7. The intermediate residence position (B) is provided above the longitudinal stretching device, and further, a) When the preparation position (D) is provided upstream of the operating position (A) with respect to the drawing direction (9) of the resin film (F), the intermediate residence position (B) is provided downstream of the operating position (A) with respect to the drawing direction (9) of the resin film (F) or b) When the preparation position (D) is provided downstream of the operating position (A) with respect to the drawing direction (9) of the resin film (F), the intermediate residence position (B) is provided upstream of the operating position (A) with respect to the drawing direction (9) of the resin film (F). The longitudinal stretching device according to claim 6.

8. The consumable assembly (21) includes an assembly frame (15) having positioning pieces (41, 43) that are locked to at least the operating position (A) and / or the preparation position (D) and / or the intermediate residence position (B) of the longitudinal stretching device. The longitudinal stretching device according to any one of claims 1 to 7.

9. The assembly frame (15) swings at least at a certain angle about an axis disposed perpendicular to the drawing direction of the resin film (F) by a positioning piece (41) provided at one end of the assembly frame (15), The longitudinal stretching device according to claim 8, wherein the longitudinal movement of the replaceable consumable assembly (21) in the longitudinal axis direction is adjusted between the assembly frame (15) and the frame of the longitudinal stretching device by a positioning piece (43) provided at the other end of the assembly frame (15) of the consumable assembly (21).

10. One of the positioning pieces (41) provided at one end of the assembly frame (15) of the wearable assembly (21) is formed in a conical shape or a frustum of a cone. The positioning piece (43) provided at the other end of the assembly frame (15) of the wearable assembly (21) is formed with a trapezoidal cross-section, and the inclined side surface of the positioning piece (43) forming the trapezoidal cross-section cooperates with a pair of side boundary portions or side pieces (47) of the frame body of the vertically extending device arranged laterally. The vertical extending device according to claim 9.

11. The wearable assembly (21) to be replaced includes a media distributor for connecting a pipe through which a liquid or gaseous heating medium flows and / or a pneumatic distributor for connecting a pneumatic pipe and / or an electrical distributor for connecting an electric wire. The media distributor, the pneumatic distributor, and the electrical distributor are provided with detachable quick connectors. The vertical extending device according to any one of claims 1 to 10.

12. The preparation position (D) and / or the standby area (19) provided in the adjacent space of the vertical extending device is provided in front of, behind, or laterally of the vertical extending device with respect to the longitudinal direction or the drawing-out direction (9) of the vertical extending device. The vertical extending device according to claim 1.

13. The vertical extending device according to at least one of claims 1 to 10 includes an operating position (A) for attaching and operating the wearable assembly (21) to be replaced, and a preparation position (D) and / or a standby area (19) for waiting for another wearable assembly (21). The wearable assembly (21) arranged in the preparation position (D) and / or the standby area (19) can reach the operating temperature or at least the preheating operating temperature or reach the operating temperature before being attached to the operating position (A). The preheating operating temperature is a temperature higher than the operating temperature or a temperature less than 30°C lower than the operating temperature. The preparation position (D) and / or the standby area (19) is arranged and / or set in the vertical extending device. A method for replacing the wearable assembly (21) of the vertical extending device, characterized in that.

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