JP2011246203A - Core pipe extracting method and core pipe extracting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for efficiently extracting a core pipe from a plastic film wound on the core pipe.SOLUTION: This core pipe extracting device includes a material transfer means for removably placing and intermittently transferring a transfer pallet for arranging a core pipe winding tape in the advancing direction, a heating means for softening or melting an adhesive for joining the winding tape and the core pipe by inserting a cartridge heater inside the core pipe so as to freely go in and out, a cutting-in means for cutting in by moving a heated cutter along the longitudinal direction of the core pipe to an outside winding tape of the core pipe, a core extracting means vertically movably arranged for separating the winding tape by pushing in the core pipe, and a controller for adjusting a series of operation of reaching operation for intermittently transferring the transfer pallet in the advancing direction, operation for moving the cartridge heater, operation for moving the cutter and operation for pushing in the core pipe.

Description

  The present invention relates to a method and an apparatus for efficiently extracting a core tube from a plastic film attached to the core tube.

  In general, polyolefin resins such as polyethylene and polypropylene, thermoplastic resins such as polyvinyl chloride, polyvinylidene chloride, polyester and polyamide, and films and sheets containing natural polymers (hereinafter referred to as “Plastic Film”) are calendered. These are mass-produced by the extruder method (T-die method), casting method, inflation method, coating method and the like. And the wide film and sheet | seat manufactured through the said manufacturing process are once scraped off by core pipes, such as a paper basket, a wood tube, and a metal tube. Further, the plastic film formed in this way is coated with an adhesive, and then cut by a dedicated cutting machine to be finished into a narrow-width adhesive tape product. In addition, the plastic film is printed or surface-treated to form a decorative sheet, and a foam sheet, fabric, paper or the like is further laminated on the back surface of the decorative sheet, and building materials such as flooring and wall materials, clothing, and automobiles. Widely used for interior materials.

  In the film forming step of the plastic film formation, a raw material resin heated and melted is rolled with a calender roll or extruded from a die to form a film, which is then cooled and scraped off into a core tube. There are two main methods for scraping the core tube: the center scraping method and the surface scraping method. In the former, the core tube is driven to scrape the plastic film on the core tube. In the latter, the core tube is placed on a rotating roller and rotated in a follow-up manner. However, in either case, normally, at the beginning of whisking, an adhesive is applied to the core tube to fix the plastic film end to the core tube, and the surface speed of the rotating core tube is made faster than the supply rate of the plastic film. It is well known that unless an appropriate pulling force is applied to the membrane, the film is loosened and cannot be scraped off well.

However, the tensile force applied at the time of scraping is accumulated as an internal stress without causing plastic flow of molecules at temperatures below the pour point. This internal stress acts to shrink the plastic film in the longitudinal direction over time, resulting in tightening of the core tube. Further, the plastic film has a thermal conductivity as small as 10 ⁻⁴ order compared to metal or the like, and the inside is often not completely cooled even after passing through the cooling zone until scraping. In particular, as the speed of the apparatus increases in recent years, this tendency is strong, and the plastic film tends to be scraped off in a state where it is stretched in a rubber state in a slightly heated state. For this reason, volume shrinkage due to cooling is added with the passage of time, and the force for tightening the core tube increases, which makes it difficult to pull out the core tube.

  The applicant of the present application has filed an application relating to an invention relating to a core tube extraction device that previously extracts a core tube from a core tube adhesive tape on which a plastic film has been formed, and the invention has been disclosed (Patent Document 1). Such an apparatus is not limited to a waste product of the adhesive tape, but is generally excellent in that it can be widely applied to a roll-like adhesive plastic film including a wide plastic film. However, (1) When cutting along the longitudinal direction of the core tube, chips may scatter depending on the usage conditions of the rotary blade. (2) Inserting a cartridge heater inside the core tube to soften the adhesive Or, when the cartridge heater is lifted in the heating means to be melted, the adhesive tape may be lifted together with the cartridge heater. (3) A point to be improved regarding the simplification of the supply of the core tube adhesive tape has been found, and further improvements Repeated.

JP 2004-222567 A

  As a result of earnest research on the points to be improved, the inventor of the present application has found that (1) can be solved by using a heated cutter instead of the rotary blade, and (2) It has been found that a two-stage spring mechanism that urges the cartridge heater in a direction opposite to the direction in which the cartridge heater is pulled up is provided at a position where it abuts against the adhesive tape. The present invention has been conceived by finding a solution by detachably placing a transfer pallet to be devised, and an object of the present invention is to solve the above-mentioned problems and Chips due to usage conditions do not scatter, and adhesive tape does not lift with the cartridge heater when the cartridge heater is pulled up. Supply core tube Mekuchaku tape can be simple and neat, yet device is to provide a novel core tube sampling method and apparatus in a relatively compact.

  In order to solve the above-described problems, the present invention provides a material transfer means for detachably placing a transfer pallet on which a core tube adhesive tape is placed and intermittently transferring it in the traveling direction, and a cartridge heater inside the core tube. A heating means for softening or melting the adhesive that joins the core tube of the adhesive tape and the plastic film portion by inserting and retracting, and a cutter heated on the plastic film portion of the adhesive tape in the longitudinal direction of the core tube Cutting means for moving along and cutting, core-cutting means provided to move up and down to push the core tube and separate the core tube and the plastic film part, and operation to intermittently transfer the transfer pallet in the traveling direction And a controller that adjusts a series of operations from moving the cartridge heater, moving the cutter, and pushing the core tube. To the core tube extractor (claim 1).

  In order to solve the above-mentioned problem, the present invention is configured such that the cutter reciprocates along the longitudinal direction of the core tube of the core tube adhesive tape, and the blade is reciprocated in the reciprocating direction. It is preferable that the core tube removing device is provided obliquely and upwardly and downwardly (Claim 2).

  In order to solve the above-mentioned problem, the present invention provides the above core tube extracting device, wherein the cutter is heated to a temperature higher than a softening temperature or a melting temperature of the adhesive tape. (Claim 3).

  Further, in order to solve the above-mentioned problems, the present invention is configured such that an elevating box and a cartridge heater are connected to a cylinder rod of a heater vertical motion cylinder so as to be movable up and down in conjunction with the heater vertical motion cylinder. A suspension bar penetrating in the vertical direction is locked so as to be movable up and down, and is urged in a direction to push the suspension bar downward between a connecting pin at the upper end of the suspension bar and the front surface of the lifting box. A spring is provided, and a pin press base is suspended at the lower end of the suspension bar, and a through-hole that penetrates the cartridge heater is formed in the center of the pin press base. A plurality of penetrating small holes are formed in the through holes so as to loosely penetrate the pressing pins at positions where they are in contact with the adhesive tape around the through holes. And the push pad A second spring for urging the pin in the downward direction is provided, and an elastic member is attached to the lower end portion of the push-down pin to prevent slipping and to absorb shock and maintain stability. It is preferable that the core tube extracting device is characterized.

  Further, in order to solve the above-mentioned problem, the present invention relates to the invention until the push pin moves up and down in conjunction with the cartridge heater, and the cartridge heater rises and the large-diameter portion is pulled out from the core tube. It is preferable that the core tube removing device is in contact with the adhesive tape and is separated from the adhesive tape when the large diameter portion of the cartridge heater is extracted from the core tube.

  In order to solve the above-mentioned problems, the present invention provides a plate-like body having a hole in the plate-like body through which the core tube of the core tube attachment tape can be penetrated at equal intervals. A gap is formed so that a cutter can be inserted from one side of the body toward the center of each core tube hole, and a locking hole for locking the projection of the pallet transfer arm is formed on the side facing the gap of the plate-like body. Preferably, the core tube extracting device is formed by drilling (claim 6).

  In order to solve the above-mentioned problems, the present invention provides a transfer means for intermittently transferring the transfer pallet in the traveling direction, a heating means for moving the cartridge heater up and down, a cutting means for moving the cutter up and down, and a core for pushing in the core tube. It is preferable to use the above-described core tube extracting device, wherein a cylinder is used as the extracting means, and the operation of each cylinder is adjusted by a controller.

  In order to solve the above-mentioned problems, the present invention includes a step of placing a core tube attachment tape on a transfer pallet and placing it on a core tube removal device, and a transfer pallet on which the core tube attachment tape is arranged. A material transferring step for intermittently transferring in the advancing direction, and a heating step for softening or melting an adhesive for joining the adhesive tape to the core tube by inserting and heating a cartridge heater inside the core tube of the core tube adhesive tape; A cutting step of moving a heated cutter along the longitudinal direction of the core tube in the heating step to cut the tape that has been attached, and a core removal step of extracting the core tube from a plastic film. A core tube extraction method is provided (claim 8).

  Further, in order to solve the above problems, the present invention provides a heating process in which a cartridge heater is inserted into the core tube and heated to reverse the direction in which the cartridge heater is pulled up when the cartridge heater is removed from the core tube. The above-described core tube extraction method is characterized in that a two-stage spring mechanism comprising a first spring and a second spring biased to act acts to prevent the adhesive tape from adhering to the cartridge heater and lifting up. (Claim 9).

  The method and apparatus for extracting a core tube of the present invention is configured as described above, and by using a heated cutter in place of a rotary blade, there is no scattering of tape chips, and the cutting speed is remarkably increased. It was. Further, by providing a two-stage spring mechanism that urges the cartridge heater in a direction opposite to the direction in which the cartridge heater is pulled up, the adhesive tape does not adhere to the cartridge heater and is lifted, thereby speeding up the stroke. Furthermore, since a plurality of core tube adhesive tapes can be set in the device at once by simply placing a transfer pallet on which the core tube adhesive tapes are pre-arranged, there is no work mistake and no labor is required, which further contributes to the improvement of work efficiency. It became possible. Since the device itself is also compact, there is an effect that does not take up space for installation.

It is explanatory drawing of the front view which shows the core pipe extraction apparatus which concerns on Example 1. FIG. It is explanatory drawing of the side view which shows the core pipe extracting device which concerns on Example 1. FIG. It is explanatory drawing of the planar view which shows the movement history of a transfer pallet. FIG. 2 is an enlarged explanatory view of a heating unit, a cutting unit, and a centering unit of FIG. 1. FIG. 5 is an enlarged explanatory view in the vicinity of the pin presser base of FIG. 4. It is explanatory drawing of a material transfer means. It is a circuit diagram of a cylinder.

  The purpose of easily extracting the core tube from the plastic membrane firmly attached by the tightening force for tightening the core tube made of plastic membrane is to reduce the work efficiency without reducing the work efficiency. This was achieved without the part sticking to the plastic film or damaging the core tube.

  Next, although an example is described based on a figure below, Example 1 illustrates about a device which extracts a core from a narrow plastic membrane attached to a core which is a cut end, such as an adhesive tape. To do. Thus, the present invention is not limited to the present embodiment.

  FIG. 1 is a front view illustrating the core tube extracting apparatus according to the first embodiment, and FIG. 2 is a side view illustrating the same. FIG. 3 is an explanatory view in plan view showing the movement history of the transfer pallet, and FIG. 4 is an enlarged explanatory view of the heating means, the cutting means, and the centering means. 5 is an enlarged explanatory view of the vicinity of the pin press stand, FIG. 6 is an explanatory view of the material transfer means, and FIG. 7 is an air circuit diagram of the cylinder. In these figures, the core tube extracting device 1 is configured to intermittently transfer a plurality of transfer pallets 31 in which a plurality of adhesive tapes 2 attached to the core tube are arranged at regular intervals in a moving direction. Material transfer means 3 for heating, a heating means 4 for softening or melting an adhesive for joining the core pipe of the adhesive tape and the plastic film portion by inserting a cartridge heater into the core pipe so as to be freely inserted and removed, A cutting means 5 for moving a cutter heated on the plastic film portion along the longitudinal direction of the core tube and cutting it, and a vertically movable member for pressing the core tube to separate the core tube and the plastic film portion are provided. A series of operations from the centering means 6 and the operation of intermittently transferring the transfer pallet in the traveling direction, the operation of moving the cartridge heater, the operation of moving the cutter, and the operation of pushing in the core tube Characterized in that and a controller for adjusting.

  Next, the core tube extracting device 1 will be described in detail. As shown in FIG. 3 or 6, the transfer pallet 31 used for the material transfer means 3 is a rectangular plate in which a plurality of core tube holes 312 through which the core tube 21 of the adhesive tape 2 is passed are formed at equal intervals in a horizontal row. A narrow gap 313 into which a cutter heading from one side of the plate-like body toward the center of each core tube hole can be inserted, and a pallet on the side facing the gap 313 is formed. A locking hole 314 for locking the protrusion of the transfer arm is formed. The adhesive tape 2 is arranged on the transfer pallet 31 through the core tube 21. The peripheral edge of the core tube hole 312 where the plastic film part 22 abuts may be formed one step lower. The number of core tube holes 312 can be appropriately changed in consideration of workability and the configuration of the apparatus.

  An arm Y33 that pushes the transfer pallet 31 from the front to the back is provided at the base point on the left side of the core tube removing device 1 so as to be movable back and forth (in the y-axis direction) by a (magnet type) rodless cylinder Y, for example. The arm X for transferring the transfer pallet 31 from the left to the right is provided on the inner side of the core tube extracting device 1 so as to be movable up and down (z-axis direction) and left and right (x-axis direction) by a cylinder. In addition, the arm X32 is provided with two protrusions 34 that are respectively engaged with the engagement holes 314 of the transfer pallet 31 upward. When the transfer pallet 31 is moved to the left side of the core tube removal device by hand, the arm Y33 pushes the pallet 31 to the back, then the arm X32 is raised and the projection 321 is the locking hole 314 of the transfer pallet 31. And the transfer pallet 31 is intermittently transferred in the right direction. 3A shows a state in which the arm Y33 has pushed the transfer pallet 31 backward by the rodless cylinder Y, and FIG. 3B shows that the arm X32 is moved to the left side after the arm Y33 returns to the front side. As shown in FIG. 2, the projection 34 is lifted and raised so that the protrusion 34 is locked in the locking hole 314 of the transfer pallet 31. The timing for starting the movement of the pallet 31 and the timing for starting or ending the operation of the members described below are provided in an electric signal, a limit switch, or a cylinder that is transmitted from the light sensor of the light transmitter / receiver set at a predetermined location. It is preferable that the controller determines and gives an instruction from an electrical signal transmitted by the auto switch (contact or non-contact).

  As shown in FIG. 1 or 2, a frame body 7 is provided in the middle of the base 9 of the core tube extraction device 1, and the heating means 4 and the centering means are provided on the front side of the frame body 7. 6 are arranged in parallel, and a cutting means 5 is provided behind the heating means 4. As shown in FIG. 4 or 5, the heating means 4 is a cartridge heater having a shape in which a heater vertical movement cylinder 42 is fixed above the frame body 7, and a spindle-shaped tip is cut at the lower end of the cylinder rod. 41, and a lifting box 43 is connected to the middle thereof so as to move up and down in conjunction with the cylinder. And the suspension rods 44 and 44 of the two pin foots which penetrate this raising / lowering box 43 to the up-down direction are latched to the both sides of a cylinder rod so that a vertical movement is possible.

  The upper ends of the suspension bars 44 and 44 are connected to the horizontal bars 441 and the connection pins 442, and the suspension bars 44 and 44 are pushed downward between the connection pins and the lower portion of the front surface of the lifting box 43. A first spring 46a is provided for biasing. A pin press platform 45 is suspended from the lower ends of the suspension bars 44. A through hole that penetrates the cartridge heater 41 is formed in the central portion of the pin holder 45, and the push pin 47 penetrates at a position where it contacts the adhesive tape 2 around the through hole. A penetrating small hole is provided. A second spring 46b is provided between the upper end of the pressing pin 47 and the pin press base 45 to urge the pressing pin 47 in a descending direction, while allowing the pressing pin 47 to loosely pass through the through hole. An elastic member 48 such as rubber is attached to the lower end portion of the pressing pin 47 in order to prevent slipping and absorb shock and maintain stability. Further, the front and rear of the pin presser 45 are formed in a cube shape shorter than the left and right, and the heating cutter 51 is configured not to contact the rear part of the pin presser 45 when moving up and down.

  Next, the operation and action of the two-stage spring mechanism of the first spring and the second spring will be described. The heater vertical movement cylinder 42 is lowered when the horizontal bar 441 at the upper end of the suspension bars 44, 44 is in contact with the lifting box 43 at the start of lowering. Thereafter, when the pressing pin 47 is placed on the adhesive tape 2, the lifting box 43 is lowered together with the heater vertical movement cylinder 42, but since the pin pressing base 45 is stopped, the horizontal bar 441 at the upper end of the suspension bars 44, 44 is The first spring 46 a protrudes above the lifting box 43 and acts in a direction in which the suspension bars 44 and 44 and the pin presser 45 are lowered. On the other hand, a plurality of (four in this embodiment) pressing pins 47 provided on the pin pressing base 45 chop the adhesive tape 2 in a small amount so as to maintain the horizontal balance by the impact absorbing action of the second spring 46b. As a result of the pressing, even if the adhesive tape 2 and the heater vertical movement cylinder 42 are slightly shaken, there is no abnormality such as the adhesive tape coming off from the transfer pallet or falling down.

  When the adhesive of the core tube is melted by the cartridge heater 41, the heater vertical movement cylinder 42 rises. While the large-diameter portion of the cartridge heater 41 escapes from the core tube, the first and second springs are formed. Due to the mechanism of the two-stage spring mechanism, the pressing pin continues to press down the adhesive tape 2 as it is. At the timing when the large-diameter portion of the cartridge heater 41 escapes from the core tube, the horizontal bar 441 at the upper end of the suspension rods 44 and 44 rises together with the heater vertical movement cylinder 42 while being engaged with the elevating box 43, The 45 push pins are separated from the adhesive tape 2. As the heater, an electric heater whose temperature can be adjusted by a thermostat is usually used. In addition to the electric heater, a heat medium such as steam, silicone oil, and dowsum, and a material of an adhesive vehicle, for example, a vinyl chloride resin are used. In the case of high-frequency heating, in the case of an olefin resin, ultrasonic heating can also be used. The cartridge heaters 41 and 41 are set in advance to a temperature (about 100 to 200 ° C.) or higher for softening or melting the tape fixing adhesive, and are heated for about 5 to 30 seconds. It goes without saying that the setting of conditions such as the heating time and heating temperature of the cartridge heater can be freely selected according to the material.

  Next, the cutting means 5 will be described. As shown in FIG. 2 or FIG. 3, the cutting means 5 has a cutter vertical movement cylinder 52 fixed to the frame 7 behind the heating means 4, and the heating cutter 51 is attached to the lower end of the cylinder rod. The blade is connected to the cylinder 52 so as to move up and down in a state where the blade is directed to the second side. Since the heating cutter 51 moves up and down while being sandwiched between the gaps 313 of the stopped transfer pallet 31, the plastic film portion 22 can be cut without shaking the blade. What is necessary is just to select the setting temperature of the heating cutter 51 suitably with the raising / lowering speed | rate of a cutter, or the material of the plastic film | membrane part 22, Usually, about 180-250 degreeC, More preferably, it is set to about 200-230 degreeC. The heating cutter 51 is not particularly limited, but an impulse heat cutter or a cartridge heater cutter that generates heat from the blade itself is preferable. In addition, you may use the heating method described with the said heating means.

  As for the shape of the blade of the heating cutter 51, the blade may be formed only on one of the upper and lower sides that reciprocate, but it is preferable to provide the blade that intersects obliquely with respect to the direction of the reciprocating motion upward and downward, respectively. For example, it is preferable that the blade is formed on the side of the convex portion such as an arc shape or a mountain shape as shown in FIG. If the heating cutter 51 is used, it is possible not only to prevent chips from being scattered like a conventional rotary blade, but also to cut the speed at the moment when the high-temperature blade comes into contact with the plastic film portion 22, thereby speeding up the work. Measured. The entire plastic film portion 22 that has been adhered may be cut, but as long as the core tube can be separated without applying an excessive load to the core tube push-in portion, it may be possible to cut only part of the core tube portion. Good. Further, if the cutting by the heating cutter 51 is configured to be completed during the process of heating the core tube, waste of work time can be prevented.

  The adhesive tape 2 after the softening or melting of the adhesive of the core tube by cutting and heating of the plastic film part 22 is then transferred to the centering process. As shown in FIG. 4, the centering means 6 has a core tube pushing portion vertical movement cylinder 62 fixed to the frame 7 beside the heating means 4, and the core tube pushing portion 61 is located at the lower end of the cylinder rod. It is connected to the cylinder 62 so as to move up and down. The core tube pushing portion 61 is configured by cutting a spindle-shaped tip portion, and a stepped peripheral protrusion 63 is formed on the periphery of the large diameter portion. By inserting and pressing the distal end portion into the core tube, the stepped peripheral protrusion 63 pushes in the core tube 21, and the core tube is easily separated from the plastic film portion 22 and the discharge port 65 on the back side of the apparatus. After that, it is dropped and collected in the stock box 64 by its own weight (see FIG. 2). When the core tube pushing portion 61 is pulled up after the core tube 21 is pushed in, even when the plastic film portion 22 is lifted in a state suspended from the core tube pushing portion, it is blocked by the horizontal beam 71 below the frame body 7. It falls on the transfer pallet 31. The plastic film part 22 remaining on the transfer pallet 31 is collected and recycled. In this way, the core tube and the tape can be collected separately.

  As a series of operations in the present embodiment, for example, the transfer pallet is moved to a predetermined position by two types of arms X and Y, and the cartridge heater is inserted into the core tube of the first adhesive tape and the heating cutter is moved up and down. . Next, after the cartridge heater is raised, the transfer pallet is intermittently transferred, and then the core tube pushing part is moved up and down by the vertical moving cylinder of the core pipe pushing part, and the transfer pallet is sequentially moved in the traveling direction. To do. When the transfer pallet after the centering is removed, the next new pallet is transferred and the above operation is repeated. The above series of operations can be performed manually by the operator by operating the operation panel 8, but the series of operations is performed by a programmable controller (Programmable Controller, PC) or a programmable logic controller (Programmable Logic Controller) such as a sequencer. For example, it is preferable that the program is stored as a ladder program in the storage unit of the controller (PLC) and is automatically operated. FIG. 7 shows a circuit diagram in the case where the series of operations are performed by an air cylinder. A hydraulic cylinder may be used in place of the air cylinder, and the case of a hydraulic cylinder is also shown.

  The core tube extracting device according to the present invention is not limited to the waste of adhesive tape, which is a conventional paper punching device, but is generally widely applicable to adhesive tapes and the like, and a transfer pallet on which the adhesive tape is arranged is placed at a predetermined position. However, it is only necessary to leave it to automatic operation. The operation is simple and the work efficiency is greatly improved, which is extremely useful.

1: core tube extraction device, 2: adhesive tape, 21: core tube, 22: plastic film part, 3: material transfer means, 31: transfer pallet, 311: plate-like body, 312: core tube hole, 313: 314: locking hole, 32: arm X, 33: arm Y, 34: protrusion, 4: heating means, 41: cartridge heater, 42: heater vertical movement cylinder, 42 ': cylinder rod, 43: lifting box, 44: Suspension bar, 441: Horizontal bar, 442: Connecting pin, 45: Pin holder, 46a: First spring, 46b: Second spring, 47: Push pin, 48: Elastic member, 5: Cutting means, 51 : Heating cutter, 52: Cutter vertical movement cylinder, 52 ': Cylinder rod, 6: Centering means, 61: Core pipe pushing part, 62: Core pipe pushing part vertical movement cylinder, 62': Cylinder rod, 6 : Peripheral protrusion, 64: stock box, discharge port 65, 7: frame, 71: side rail, 8: operation panel, 9: base, X: arm X cylinder, X ': cylinder rod, Y: arm Y Rodless cylinder

Claims (9)

A material transfer means for detachably placing a transfer pallet for placing the core tube adhesive tape and intermittently transferring it in the direction of travel, and a core heater and plastic for the adhesive tape by inserting a cartridge heater into and out of the core tube. Heating means for softening or melting the adhesive for joining the film forming parts; cutting means for moving the cutter heated on the plastic film forming part of the adhesive tape along the longitudinal direction of the core tube; and the core Centering means that can be moved up and down to push the tube and separate the core tube and plastic film part, operation to intermittently transfer the transfer pallet in the direction of travel, operation to move the cartridge heater, operation to move the cutter And a controller for adjusting a series of operations up to the operation of pushing in the core tube. The cutter is configured to reciprocate along the longitudinal direction of the core tube of the core tube attachment tape, and the blade is provided obliquely upward and downward with respect to the direction of reciprocation. The core tube extracting device according to claim 1. The core tube extraction device according to claim 1 or 2, wherein the cutter is heated to a temperature higher than a softening temperature or a melting temperature of the adhesive tape. The elevator box and cartridge heater are connected to the cylinder rod of the heater vertical cylinder so that it can move up and down in conjunction with the heater vertical cylinder. A first spring is provided between the connecting pin at the upper end of the suspension bar and the front surface of the lifting box to urge the suspension bar in a downward direction. A pin presser is suspended, and a through hole that penetrates the cartridge heater is drilled in the center of the pin presser, and the pin presser is pressed to a position where it is in contact with the adhesive tape around the through hole. A plurality of through-holes that penetrate the pins are provided, and the push-down pins are allowed to pass through the through-holes, and the push-down pins are lowered between the upper end of the push-down pins and the pin presser base. A second spring is provided to bias 4. The core tube according to claim 1, wherein an elastic member is attached to a lower end portion of the push-down pin in order to prevent slippage and absorb shock and maintain stability. Extraction device. The push pin moves up and down in conjunction with the cartridge heater, contacts the adhesive tape until the cartridge heater rises and the large-diameter portion is pulled out of the core tube, and the large-diameter portion of the cartridge heater is the core 5. The core tube extracting device according to claim 1, wherein the core tube extracting device is separated from the adhesive tape when extracted from the tube. In the transfer pallet, a core tube hole that can penetrate the core tube of the core tube attachment tape is formed in the plate-like body at equal intervals, and the cutter is directed from one side surface of the plate-like body to the center of each core tube hole. A clearance hole for locking the protrusion of the pallet transfer arm is formed on the side facing the clearance of the plate-like body. The core tube extracting device according to 3, 4, or 5. The controller controls the operation of each cylinder using a cylinder as a transfer means for intermittently transferring the transfer pallet in the advancing direction, a heating means for moving the cartridge heater up and down, a cutting means for moving the cutter up and down, and a centering means for pushing the core tube. The core tube extracting device according to claim 1, 2, 3, 4, 5 or 6. A step of placing the core tube attachment tape on the transfer pallet and placing it on the core tube removal device; a material transfer step of intermittently transferring the transfer pallet on which the core tube attachment tape is arranged in the advancing direction; A heating process in which a cartridge heater is inserted inside the core pipe of the adhesive tape and heated to soften or melt the adhesive that joins the adhesive tape to the core pipe, and heating is performed along the longitudinal direction of the core pipe during the heating process. A core tube extracting method comprising: a cutting step of moving a cut cutter to cut the attached tape, and a core extracting step of extracting the core tube from a plastic film. In the heating step of inserting and heating a cartridge heater inside the core tube, a two-stage consisting of a first spring and a second spring that urges the cartridge heater in a direction opposite to the direction in which the cartridge heater is pulled up when the cartridge heater is removed from the core tube. 9. The core tube extracting method according to claim 8, wherein the spring mechanism acts to prevent the adhesive tape from adhering to the cartridge heater and lifting.

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