JP2006145407A - Sealed part inspection method for resin tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To conduct inspections for faulty sealing strength without scattering the content of a resin tube and prevent a deterioration in production efficiency by removing suspension of operations for the resin tube. <P>SOLUTION: When inspecting the sealing strength of the resin tube 9 filled with the content 14, a belly portion of the resin tube 9 is pressurized by a seal clamp sections 61, 62 with being clamped with the sealed part 11 being upward. As a result of the pressurization, the occurrence or not of a projection change caused by the detachment of the sealed part 11 is detected by a rod 72 of a sensor (a displacement sensor) 71. When the projection change is detected, the sensor 71 outputs a disqualifying signal to exclude the resin tube 9 as a faulty product. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for inspecting a sealing portion of a resinous tube, and in particular, a resinous tube for filling contents such as a decorative material and an adhesive, and the content of the resinous tube is poured out. Alternatively, the present invention relates to a method for inspecting a seal portion of a resinous tube so that the strength of the seal portion can be inspected without scattering.

  Conventionally, a method for inspecting a seal portion of this kind of resinous tube will be described with reference to FIGS. 16 and 18. As shown in FIG. 16, the seal portion inspection device 1 includes an air cylinder 4 provided with a rod 3 that is freely accessible at the lower end of an upright piston 2, a pressing body 5 fixed to the lower end of the rod 3, A buffer body (polyurethane or rubber or the like) 6 disposed at the lower end of the pressing body 5, a holder 7 provided below the buffer body 6, and a holder for mounting and holding the holder 7 The resin tube 9 is placed on the holder 7.

  The resin tube 9 is made of a flexible synthetic resin, and as shown in FIG. 17, an extraction tube 10 and a seal portion 11 are formed at one end and the other end of the resin tube 9, respectively. Yes. The dispensing tube 10 includes a dispensing port, and a cap 12 is detachably screwed.

  After the resin tube 9 is filled with contents such as a decorative material and an adhesive, the sealing portion 11 is heated and melted to a predetermined temperature and sealed with a clamp seal.

  In the above configuration, when the resin tube 9 is held in a lying state on the holder 7 on the holding table 8 and air is pumped into the air cylinder 4, the buffer body 6 moves down together with the rod 3, and the side surface of the resin tube 9 The central portion is pressed from above with a predetermined pressure, and the pressing portion moves downward.

If the seal portion 11 of the resin tube 9 does not rupture by this pressing, it is determined that the seal portion 11 has a predetermined seal strength, and the inspection is passed. On the other hand, when the seal portion 11 is ruptured, it is determined that the seal portion 11 does not have a predetermined seal strength and the inspection is rejected (Japanese Patent Application No. 2002-118935, FIGS. 6 and 7).
Japanese Patent Application No. 2002-118935

  In the above conventional example, the center part of the side surface of the resin tube 9 in a lying state is pressed from above, and the seal strength of the seal part 11 is inspected (puncture test) depending on whether the seal part 11 is ruptured. According to this inspection method, for example, the air layer 13 in the resin tube 9 moves upward, and the contents 14 exist in the vicinity of the seal portion 11. For this reason, when the seal part 11 of the resin tube 9 is ruptured, the contents 14 are poured out from the ruptured part, or the contents 14 are scattered around the inspection area to be contaminated.

  When the contents 14 are poured out or scattered, the work must be stopped and cleaned each time. For example, in the belt conveyor type automatic line of the resin tube 9, it is necessary to stop the operation of the automatic line every time the seal part 11 is ruptured and remove the poured or scattered contents 14 to perform cleaning. . And after all cleaning work, re-operation inspection work, etc. are complete | finished, since the operation | movement of an automatic line must be started again, work efficiency or productivity, such as a test | inspection, deteriorates extremely.

  As another seal portion inspection device 15, as shown in FIG. 18, a motor 15a whose vertical position can be adjusted with a vertical adjustment handle 15d, a rotary shaft 15b projecting from the motor 15a, and a rotary shaft 15b Some have a pressing roller 15c attached to the tip. This is used by being installed on the downstream side of the belt conveyor 16. In this case, the resin tube 9 is discharged in a lying state from a chute 18 of a tube filling machine 17 disposed on the upstream side of the belt conveyor 16, and the abdominal surface portion of the resin tube 9 is pressed with a predetermined pressure by a pressing roller 15c. However, it has the same drawbacks as the conventional example.

  As described above, when the puncture test is performed by pressing the pressure roller (pressing means) on the line such as the belt conveyor 16 after filling the contents, the contents are always scattered around when the seal portion is punctured. Contaminate. Therefore, the line equipment such as a belt conveyor, a tube filling machine, and a pressure roller and its surroundings have to be manually cleaned, and the production line has to be interrupted every time a puncture occurs. For this reason, there is a problem that continuous production of the resinous tube becomes impossible and the production quantity per hour of the resinous tube is greatly reduced.

  Therefore, in the sealing part inspection method for resinous tubes, the technical problem to be solved in order to inspect the sealing part for defective strength without rupturing the sealing part and to improve productivity without stopping work. A problem arises, and the present invention aims to solve the problem.

  The present invention has been proposed in order to achieve the above-mentioned object, and the invention according to claim 1 has an opening for filling the contents, and the opening is positioned above to open the opening. In a method of inspecting a sealing portion of a resinous tube for detecting the strength of the sealing portion, the sealing portion is clamped by filling the contents from the portion and then sealing the opening. In addition, the abdominal surface portion of the resin tube is pressurized in a clamped state, and the strength / failure of the seal portion is rejected / passed due to the presence / absence of convex deformation accompanying the expansion and separation of the seal portion due to the pressure. Provided is a method for inspecting a seal portion of a resinous tube to be determined.

  According to this configuration, when the strength of the sealing portion of the resin tube filled with the contents is inspected, the sealing portion is positioned upward, the sealing portion is clamped, and in a clamped state, The sealing portion is clamped to pressurize the abdominal surface portion of the resin tube.

  As a result, whether the pressure applied to the abdominal surface portion is transmitted to the seal portion and the seal portion expands and peels, that is, whether or not a convex deformation has occurred due to insufficient strength of the seal portion of the seal portion. To detect. When the convex deformation occurs, it is determined to be unacceptable. When the convex change does not occur, it is determined as acceptable because it has the required strength of the seal portion.

  According to a second aspect of the present invention, the presence or absence of convex deformation accompanying the expansion and separation of the seal portion is detected by a displacement sensor in contact with the seal portion. I will provide a.

  According to this configuration, since the presence / absence of the convex deformation accompanying the expansion / separation of the seal portion is directly detected by the displacement sensor (deformation detection portion) in contact with the seal portion, when the convex deformation occurs A bulge change is detected immediately.

  According to the first aspect of the invention, the strength of the seal portion is inspected by pressurizing the abdominal surface portion of the sealed resin tube and detecting whether or not the seal portion has peeled off to cause convex deformation. Even when inspecting a resin tube having a poor strength of the seal portion, the contents in the resin tube are not poured out or scattered outside the tube as in the prior art. Therefore, there is no need to stop the work, stop the automatic line, remove the scattered matter, and clean the contaminated area as in the conventional case, and the working efficiency can be remarkably increased.

  According to the second aspect of the present invention, the initial change of the convex deformation accompanying the expansion and separation of the seal portion, that is, the movement of the separation and expansion due to the increase of the internal pressure can be immediately and automatically detected by the displacement sensor. In addition, it is possible to immediately and reliably detect a strength failure of the seal portion.

  The present invention is a resin tube having an opening for filling contents, filling the contents from the opening with the opening positioned upward, and then sealing the opening. In the resin tube seal portion inspection method for detecting the strength of the seal portion, the seal portion is clamped and the abdominal surface portion of the resin tube is pressurized in the clamped state. By judging whether or not the strength of the seal part is rejected or accepted by the presence or absence of convex deformation accompanying the expansion and separation of the seal part due to the above, it prevents the contents from being poured or scattered at the time of rupture of the resin tube Therefore, the purpose of preventing deterioration of production efficiency due to work stoppage was realized.

  The seal portion inspection apparatus used in the present invention includes a clamping means for inverting and clamping the resin tube so that the seal portion is on the upper side, and an application for pressurizing the side surface portion of the seal clamped resin tube. Pressure means (air cylinder, etc.) and electrical peeling deformation detecting means (for example, contact-type or non-contact-type displacement) for detecting the presence or absence of convex deformation due to peeling / bulging of the seal part due to the pressurization Sensor, pressure sensor, etc.). In this case, the digital signal of the peeling deformation measured by the displacement sensor or the like can be sent to a computer and processed, so that the result of the puncture inspection can be immediately displayed as a warning.

  This detection means identifies and inspects the degree of peeling of the seal part, that is, the strength of the seal part by electrically detecting whether or not the seal part peels off and changes in a convex shape after the tube is pressurized. . Further, the control means for controlling the pressurizing means and the defective product removing means (defective product taking chute) can be electrically connected to the detecting means. By outputting a signal indicating the strength failure of the seal portion detected by the detecting means to the control device, the operation of the pressurizing means can be stopped immediately, and the defective products can be automatically excluded by the defective product removing means.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component same as a prior art example, and the detailed description is abbreviate | omitted. According to the method for inspecting the seal portion of the resin tube 9 according to the present invention, the resin tube 9 filled with the contents 14 is set in an inverted state so that the seal portion 11 is on the upper side and clamped. If one side surface portion (abdominal surface portion) of the tube 9 is pressurized with a predetermined pressure and the strength of the seal portion 11 is less than the acceptable value, the seal portion 11 peels and expands to change into a convex shape like a balloon. Therefore, when the convex change is detected by the detection sensor, it is determined as unacceptable, and when not so, it is determined as acceptable.

  In this way, the side surface portion of the resinous tube 9 is pressurized, and the seal strength is inspected based on the presence or absence of the convex deformation accompanying the separation and expansion of the seal portion 11, so the contents 14 in the resinous tube 9 are poured. A puncture test can be performed without going out or splashing. Therefore, it is not necessary to stop the operation or stop the automatic line and clean the peripheral devices due to the scattering of the contents 14, and the like, and the deterioration of the work efficiency of the resin tube 9 can be prevented.

  A series of work steps for filling, sealing, and inspection of the resin tube 9 is shown in FIG. In the figure, reference numeral 22 denotes a jig transport moving body (index table) that circulates intermittently. A tube receiving jig 23 is placed and fixed on the jig transport moving body 22. First, the resin tube 9 is held in an inverted state on the tube receiving jig 23. Next, the resin tube 9 is rotated and positioned by detecting the mark 24 displayed on the resin tube 9. At this time, the spout on the lower end side of the resin tube 9 is closed with a cap, and the seal portion 11 is opened upward.

  Thereafter, the resinous tube 9 is raised together with the tube receiving jig 23 in the content filling device 25, and after the resinous tube 9 is filled with the content 14, the resinous tube 9 descends, and the next seal portion The resin tube 9 is raised together with the tube receiving jig 23 by the heating device 26, and the inner surface of the seal portion 11 is heated and lowered.

  Next, after the seal portion 11 of the resin tube 9 is clamp-sealed in the clamp seal device 27, the seal portion 11 is trimmed with a punching die in the seal portion trimming device 28. And after the seal | sticker intensity | strength test | inspection of the seal part 11 is implemented, the resin tube 9 is taken out.

  A specific configuration example of the seal portion inspection apparatus 30 used in the seal strength inspection is shown in FIGS. In the figure, reference numeral 31 denotes a gantry having a fixed disk 32 provided at the lower part, and an upper bracket 33 and a lower bracket 34 are horizontally provided at the upper and lower parts of the gantry 31, respectively. A guide rail 36 extending in a horizontal direction parallel to the moving direction of the index table 35 is disposed below the lower bracket 34, and a tube receiving jig 37 is placed and supported on the index table 35. .

  Further, an air cylinder 39 is attached to the upper bracket 33 in the vertical direction, and the air cylinder 39 is provided with a rod 40 that can freely enter and exit at the lower end. The lower end portion of the rod 40 is connected to an elevating device 42 that can be moved up and down along the guide shaft 41, and the upper end portions of a pair of link arms 45 and 46 are pivoted to the pivot portions 43 and 44 below the elevating device 42. It is worn.

  The upper ends of the swing arms 48 and 49 are pivotally attached to the lower ends of the link arms 45 and 46, respectively, and the intermediate portions of the swing arms 48 and 49 swing on the pivot support portions 50 and 51 of the lower bracket 34, respectively. It is pivotally supported. Further, U-shaped fitting holes 52 and 53 are cut out at lower ends of the swing arms 48 and 49, and fitting pins 54 and 55 are fitted and connected to the fitting holes 52 and 53. Yes. Further, the fitting pin 54 and the fitting pin 55 are respectively fixed to the upper portions of the first slider 56 and the second slider 57 that slide horizontally along the guide rail 36.

  First and second clamp arms 59 and 60 that hang down opposite to each other are integrally connected to lower portions of the first and second sliders 56 and 57, respectively. Further, a first seal clamp portion 61 and a second seal clamp portion 62 are integrally connected to the inner surface of the first clamp arm 59 and the second clamp arm 60 facing each other, respectively. The seal clamp parts 61 and 62 protrude opposite to each other in the horizontal direction. The vertical width of the first seal clamp part 61 is smaller than that of the second seal clamp part 62 by the vertical dimension of the sensor rod 72, and the lower surface of the first seal clamp part 61 is , Located at substantially the same height as the trimming cut line TL.

  Therefore, as the swing arms 48 and 49 swing back and forth in accordance with the ascending / descending operation of the lifting / lowering device 42, the first seal clamp part 61 and the second seal clamp part 62 are separated from and approach each other. Operate. Thus, when the seal portion 11 of the resin tube 9 is disposed between the seal clamp portions 61 and 62 and the seal clamp portions 61 and 62 are moved closer to each other, the seal portion 11 is clamp-sealed. .

  Further, the first and second clamp arms 59 and 60 have a first air cylinder 66 and a second air cylinder 66 respectively provided with a first rod 64 and a second rod 65 that can be expanded and contracted in the horizontal direction, respectively. Two air cylinders 67 are provided, and a first pusher 68 and a second pusher 69 are connected to the distal ends of the first rod 64 and the second rod 65, respectively.

  The pushers 68 and 69 move toward and away from each other according to the extending and shortening operations of the rods 64 and 65, respectively. Accordingly, by placing the center of the abdominal surface (side surface center) of the resin tube 9 between the pushers 68 and 69 and moving the rods 64 and 65 closer to each other, the abdominal surface of the resin tube 9 A predetermined pressure is applied.

  Reference numeral 71 denotes a sensor (displacement sensor) for detecting a convex deformation portion of the seal portion 11 that accompanies the pressurization, that is, a portion that peels and changes, and the sensor 71 is a first clamp arm here. 59 is disposed between the upper and lower intermediate portions 59, more specifically, between the seal clamp portion 61 and the pusher 68. The convex deformation portion detection sensor 71 includes a sensor rod 72 disposed immediately below the lower surface of the seal clamp portion 61, an air cylinder 73 having a rod connected to the base end portion of the sensor rod 72, and the air cylinder 73. Embedded in the sensor rod movement amount (movement position information) detection unit, a signal line 74 for electrically connecting the detection unit and the control device (not shown), and the sensor rod 72 on the opposite side of the air cylinder 73. And a compression spring 75 that urges and urges the rod toward the tip of the rod. Further, the air cylinder 73 is fastened and fixed to the lower surface of the outer projecting portion of the clamp arm 59.

  The sensor rod 72 is advanced in the direction approaching the second seal clamp portion 62 by the extension operation of the air cylinder 73. Therefore, when the sensor rod 72 is moved forward to the seal portion 11 side of the resin tube 9 clamped by the seal clamp portions 61 and 62, the tip end portion of the sensor rod 72 directly contacts the surface of the seal portion 11.

  Thus, the distance at which the sensor rod 72 is retracted by receiving a reaction force immediately after the pressure on the tube abdominal surface portion, that is, the retraction displacement amount by which the sensor rod 72 is pushed back by the expansion output of the seal portion 11 is It is detected by the detection unit. When the amount of displacement is greater than or equal to a predetermined amount, it is determined that the seal strength is defective, and a defect signal is sent to the control device via the signal line 74.

  The seal strength inspection is performed by the seal portion inspection device 30 after the resin tube 9 is filled with the contents 14. First, as shown in FIGS. 4 and 5, the resinous tube 9 is interposed between a pair of seal clamp portions 61 and 62 separated from each other in a state where the resinous tube 9 is inverted so that the seal portion 11 is on the upper side. Is positioned. In this case, the center of the vertical width of the seal portion 11 substantially coincides with the height of the trimming cut line TL as shown in FIG.

  Next, as shown in FIGS. 7 and 8, the first slider 56 and the second slider 57 are moved in the directions A and B approaching each other, so that both side surfaces of the seal portion 11 are paired with a pair of seal clamp portions. It clamps and clamps by 61,62. At this time, the sensor rod 72 is brought into contact with one side surface of the seal portion 11 together with the first seal clamp portion 61.

  Thereafter, as shown in FIGS. 9 and 10, by moving the pair of rods 64 and 65 in a direction approaching each other according to the drive of the pair of air cylinders 66 and 67, both side surfaces of the abdomen of the resin tube 9 are obtained. Is pressed and pressed by a pair of pushers 68 and 69 which are pressurizing means, and a predetermined pressure is applied to the resinous tube 9.

  Then, as shown in FIG. 11 and FIG. 12, the presence or absence of peeling of the seal portion 11 generated by this pressurization is detected by converting it into the amount of recoil retreat of the sensor rod 72, thereby detecting whether or not there is peeling. The seal part 11 is checked for pass / fail of the seal strength.

  FIG. 13 shows a situation when the abdominal surface portion of the resin tube 9 is pressurized by the pair of pushers 68 and 69 in a state where the seal portion 11 of the resin tube 9 is clamp-sealed. As shown in the figure, during pressurization, the first seal clamp portion 61 and the sensor rod 72 are in contact with the left side surface portion 11L of the seal portion 11, and the second seal clamp portion 62 is in contact with the right side surface portion 11R of the seal portion 11. Touch.

  Now, when the pair of pushers 68 and 69 are moved close to each other by the operation of the pair of air cylinders 66 and 67 and the abdominal surface of the resin tube 9 is pressed from both sides with a predetermined pressure and a predetermined stroke, a seal portion by this pressing is obtained. The reaction force 11 is transmitted to the sensor rod 72, converted into an electrical signal (digital signal) by the detection unit of the sensor 71, and transmitted to the control device (computer).

  At the time of pressurization, since the pressure of the air layer 13 above the contents 14 in the resin tube 9 increases, the upper portion of the resin tube 9 near the seal portion 11 is pressurized like a balloon as shown in FIG. Inflate. At this time, if the strength of the seal portion 11 is equal to or higher than the acceptable value, the resin tube 9 is not changed by the pair of pushers 68 and 69 and the sensor rod 72. In this case, it is determined that there is no occurrence of separation of the seal part, and a detection signal of the sensor 71 transmits a seal strength pass signal to the control device.

  However, if the strength of the seal portion is less than the acceptable value, as shown in FIG. 15, the seal portion 11 peels and expands and deforms in a convex shape, so that the sensor rod 72 resists the force of the compression spring 75 and Retreat with respect to the seal clamp part 62. That is, in a state where the seal portion 11 is clamped by the pair of pushers 68 and 69, the left side surface portion 11L side of the seal portion 11 swells and the sensor rod 72 is returned to the left side. This movement information is detected by the detection unit of the sensor 71, and a seal strength failure (defective product) signal is transmitted to the control device.

  As described above, a resinous tube having an opening for filling the contents 14 and sealing the opening after filling the contents 14 from the opening with the opening positioned upward. In the method for inspecting the seal portion of the resinous tube 9 for detecting the strength of the seal portion 11, whether or not there is a change in the convex shape of the seal portion 11 due to the pressurization of the abdominal surface portion of the resinous tube 9 is determined. By detecting, when the seal part 11 does not have seal strength of a predetermined pressure, a failure signal is output from the sensor 71 to the control device, and the resin tube 9 is removed from the automatic line.

  Therefore, even when a defective product having a predetermined seal strength is inspected, it is possible to prevent the contents 14 from being poured out or scattered outside the tube. In this way, it is not necessary to stop the production work of the resin tube 9, stop all the processes of the automatic line, and remove and clean the scattered / contaminant, and the production efficiency is remarkably improved.

  In short, in the present invention, after the sealing step and before the trimming step, the abdominal surface portion of the resin tube 9 is pressurized with a predetermined pressure by the pressurizing means in a state where the seal portion 11 to be trimmed is clamped by the clamping means. . When the strength of the seal portion 11 is less than the acceptable reference value due to this pressurization, the seal portion 11 is peeled and bulged and deformed due to an increase in the internal pressure of the resin tube 9, so that the external shape of the seal portion 11 is convex. Change. This convex change is detected by the sensor 71, a defective signal of the seal strength is output, and based on this, the discharge of defective products is commanded.

  Thereby, the content 14 is practically not poured out from the resin tube 9 or scattered around the inspection area, so that the continuous production of the resin tube 9 can be performed without causing a line stop. It becomes possible.

  In particular, by using a displacement sensor that directly contacts the seal portion 11 as the sensor 71 for inspecting the presence or absence of the convex deformation accompanying the expansion and separation of the seal portion 11, the convex deformation accompanying the expansion and separation of the seal portion 11 is used. The presence or absence of is directly detected. Therefore, the initial change of the convex deformation can be detected quickly, and a defective seal strength can be detected immediately and reliably.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The schematic diagram which shows one Embodiment of this invention and shows a series of work processes of filling of a resin tube, sealing, trimming, and an inspection. The one part notched front view of the seal | sticker part test | inspection apparatus of a resinous tube which shows one embodiment of this invention. FIG. 3 is a partially cutaway view taken along line AA in FIG. 2. The partial notch front view which showed one Embodiment of this invention and expanded the principal part of the seal | sticker part seal | sticker inspection apparatus of the resin tube before a seal clamp. The DD arrow line view of FIG. FIG. 5 is a partially cutaway view taken along line B-B in FIG. 4. The partially notched front view which shows one Embodiment of this invention and demonstrates the principal part of the seal | sticker part seal | sticker test | inspection apparatus of the resin tube at the time of a seal clamp. The EE arrow directional view of FIG. The partially cutaway front view which shows one Embodiment of this invention and demonstrates the principal part of the seal | sticker part seal | sticker test | inspection apparatus of the resin tube at the time of pressurization. FIG. 10 is a view taken along the line F-F in FIG. 9. The partial notch front view which shows one Embodiment of this invention and demonstrates the principal part of the seal | sticker part test | inspection apparatus of the resinous tube after pressurization. The GG arrow directional view of FIG. The partially cutaway front view which expanded the resin tube at the time of pressurization which showed one Embodiment of this invention. The partial notch front view which expanded the resin tube which shows one embodiment of this invention and expand | swells immediately after pressurization. The partially cutaway front view which expanded one embodiment of this invention and expanded the resin tube when a sensor reverse | retreats as a result of pressurization. The front view of the sealing part inspection apparatus of a resin tube which shows a prior art example. FIG. 17 is a detailed side view of FIG. 16. (A) The other conventional example, the top view of the sealing part test | inspection apparatus of a resinous tube, and its peripheral device. (B) The partial front view of the seal | sticker part test | inspection apparatus of the resinous tube of Fig.18 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seal part inspection apparatus 2 Piston 3 Rod 4 Air cylinder 5 Press body 6 Buffer body 7 Holder 8 Holding stand 9 Resin tube 10 Outflow cylinder 11 Seal part 12 Cap 13 Air layer 14 Contents 15 Seal part inspection apparatus 15a Motor 15b Rotating shaft 15c Press roller 15d Vertical adjustment handle 16 Belt conveyor 17 Tube filling machine 18 Chute 22 Jig moving body 23 Tube receiving jig 24 Mark 25 Contents filling device 26 Seal heating device 27 Clamp seal device 28 Seal trimming device 30 Seal Part Inspection Device 31 Base 32 Fixed Disk 33 Upper Bracket 34 Lower Bracket 35 Index Table (Jig Transporting Moving Body)
36 Guide rail 37 Tube receiving jig 39 Air cylinder 40 Rod 41 Guide shaft 42 Elevating device 43, 44 Pivoting portion 45, 46 Link arm 48, 49 Swing arm 50, 51 Pivoting portion 52, 53 Fitting hole 54, 55 Fitting Joint pin 56 1st slider 57 2nd slider 59 1st clamp arm 60 2nd clamp arm 61 1st seal clamp part 62 2nd seal clamp part 64 1st rod 65 2nd rod 66 1st 1 air cylinder 67 2nd air cylinder 68 1st pusher (pressurizing means)
69 Second pusher (pressurizing means)
71 sensor (detection means for convex deformation, displacement sensor)
72 Sensor rod 73 Air cylinder 74 Signal line 75 Compression spring

Claims (2)

  A resin tube having an opening for filling contents, filling the contents from the opening with the opening positioned upward, and sealing the opening, wherein the seal In the method for inspecting a seal portion of a resinous tube for detecting the strength of the portion, the seal portion is clamped, and the abdominal surface portion of the resin tube is pressurized in the clamped state, and the seal portion by the pressurization A method for inspecting a sealing portion of a resinous tube, comprising determining whether the strength of the sealing portion is acceptable or not based on the presence or absence of convex deformation accompanying expansion and peeling of the resin. 2. The method for inspecting a seal portion of a resinous tube according to claim 1, wherein presence / absence of convex deformation accompanying expansion and separation of the seal portion is detected by a displacement sensor in contact with the seal portion.

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