JP2008100710A - Packaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent hole opening and welding fluctuation generated caused by the contact of one end of a vertical seal heater formed into a plate-like shape with the transfer direction of a packaging article as a longitudinal direction with a resin film sheet prior to the other part in order to perform heat welding in a straight line parallel to the conveying direction of an article to be packaged in a packaging apparatus for covering the article to be packaged with the resin film sheet and packaging it by heat welding. <P>SOLUTION: One end of the vertical seal heater is provided with a heat insulating part, and the heat of the heater is blocked to be transmitted to the edge of the resin film sheet side of the heat insulating part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a packaging device that covers a packaged article with a resin film sheet and performs thermal welding of the resin film sheet while moving the packaged article together with the resin film sheet.

  A sheet of resin film is folded around the left and right sides of a packaged object having a flat shape such as paper, booklet, envelope, newspaper, etc., and the side edges of the resin film sheet are placed on one side of the packaged object. A package body in which overlapping folded portions are formed and a resin film sheet is thermally sealed before and after the article to be packaged and closed is often used for physical distribution, mailing, and the like.

  FIG. 14 is a view showing an example of such a package. In the package 101 shown in FIG. 14, a flat packaged object 2 is wrapped with a resin film sheet 3. The resin film sheet 3 has a front end side welded portion 3a and a rear end side welded portion 3b that are heat-welded, and a folded portion 3e in which the vicinity of the left side end 3c and the vicinity of the right side end 3d overlap each other. Yes. Further, a longitudinal seal portion 3g is provided at a substantially central portion in the front-rear direction of the folding portion 3e, and the resin film sheet is thermally welded also in the longitudinal seal portion 3g.

  FIG. 15 is a front view showing an example of a packaging apparatus 201 of the background art for creating such a package 101, and FIG. 16 is a side view thereof. The resin film sheet 3 is supplied from the film roll 22, and the resin film sheet 3 is sent along the molding plate 23 to be molded into a cylindrical shape.

  FIG. 17 is a view showing the structure of the film forming plate 23. A plate having a shape as shown in FIG. 17A (a metal plate with a slippery surface is desirable) is bent along the dotted line on the right and the first on the right side by approximately 180 degrees, and then on the left side with a slight gap. It is bent approximately 180 degrees so as to overlap with each other, and is as shown in (c). (B) is the figure which looked at (c) from the upper part, (d) is the figure which looked at (c) from the lower part.

  With respect to such a structure, when the resin film sheet 3 is inserted into the opening 23a of (c) from the back side of (c), it becomes as shown in FIG. 18, and when drawn downward, the resin film sheet 3 is as shown in (c). The left and right amount side ends 3c and 3d are formed in a cylindrical shape by forming a folded portion 3e that overlaps at the front center portion. When the lower end of the cylindrical resin film sheet 3 folded in this way is heat-sealed and closed, it becomes a bag shape. Here, when the article to be packaged 2 is inserted through the opening 23a, the article is inserted into the bottom of the cylindrical resin film sheet 3.

  Accordingly, in FIGS. 16 and 17, the cylindrical resin film sheet 3 hangs down from the film forming plate 23, and when the article 2 to be packaged is inserted into the insertion port 23a from above, it enters the inside of the cylindrical shape. Become.

  Below the film forming plate 23, a vertical sealing means 24 for forming a vertical sealing portion 3g, a driving roller 232 that sandwiches a resin film or a transported object covered with a resin film and feeds it downward from above, a pressing driven roller The horizontal sealing means 39 which forms the conveyance means 231 containing 233, the front end side welding part 3a, and the rear-end side welding part 3b is provided. Further, a first sensor 46 is provided on the upstream side (hereinafter simply referred to as upstream) of the lateral seal means in the direction of movement of the package, and a second sensor 47 is provided on the downstream side so that the passage of the package 2 can be detected. It has become. Further, a controller 248 for driving and controlling the vertical sealing means 24, the conveying means 231, and the horizontal sealing means 39 is provided according to the detection results of these sensors.

When the article to be packaged 2 is put into the molding plate 23 from above, the article to be packaged 2 is inserted inside the resin film sheet 3 formed into a cylindrical shape. Since the lower end of the resin film sheet 3 has already been thermally welded and closed by the previous packaging operation to form the bottom, the front end of the package 2 reaches this bottom and stops as shown in FIG. To do. Here, when the front end of the article to be packaged 2 is detected by the first sensor 46, the vertical seal heater 25 is pressed against the resin film sheet 3 (FIG. 19B) to form a vertical seal portion. Further, as shown in FIG. 19 (c), after the front end of the object to be packaged 2 is detected by the first sensor 46, the object to be packaged 2 is sandwiched together with the resin film sheet 3 by the conveying means 231, and is moved downward by a certain distance. You may perform a vertical seal | sticker after conveying. If it does so, the position of the conveyance direction of a vertical seal | sticker part can be changed by changing the distance conveyed below. Next, the article 2 to be packaged is sent downward together with the resin film sheet 3 by the conveying means 231, and when the rear end of the article 2 to be packaged is detected by the second sensor 47, the feeding is temporarily stopped. Then, heat welding is performed on the rear end side of the article to be packaged 2 by the horizontal sealing means 39 (FIG. 19 (e)). Thereafter, the transport film 231 pulls the resin film sheet 3 above the heat-welded portion upward, and cuts the resin film sheet 3 at the heat-welded portion (FIG. 19 (f)). The article 2 to be packaged packaged in the resin film sheet 3 falls downward. Such a packaging device 201 is shown in Patent Document 1 already filed by the present applicant.
Japanese Patent Application No. 2005-251212 (FIGS. 15, 6, 10, 11, 14 and others)

  FIG. 20 is a diagram showing a second example of the package. A package 301 shown in FIG. 20 has a flat-shaped article 2 wrapped with a resin film sheet 303. In the resin film sheet 303, a resin film sheet 303x covering the front side of the article to be packaged 302 and a resin film sheet 303y covering the back side of the article to be packaged 302 are a front end side welded portion 303a, a rear end side welded portion 303b, and a left side. Thermal welding is performed at the end welded portion 303c and the right side end welded portion 303d.

  FIG. 21 is a front view showing a packaging apparatus 401 of the background art for producing such a packaging body 301. Resin film sheets 303x and 303y are respectively supplied from a pair of film rolls 422a and 422b provided on the top and bottom. In the meantime, when the article to be packaged 2 is pushed in from the right side of the figure in the direction of the arrow, the tips of the resin film sheets 303x and 303y are already heat-welded in the previous packaging operation. The welded tips of 303x and 303y are pushed to the left and inserted into the conveyor belt 431. When the tip of the article 2 is detected by the sensor S41, the conveyance belt 431 starts to drive. The conveyor belt 431 conveys the article to be packaged 2 and the resin film sheets 303x and 303y sandwiching the article from above and below from the right to the left in the drawing. When the sensor S42 detects the rear end of the article 2 to be packaged, the driving of the conveyor belt 431 is stopped, and the article 2 to be packaged is stopped while being sandwiched between the conveyor belts 431. Next, on both sides in the direction orthogonal to the conveying direction of the article 2 to be packaged, the vertical seal heater 424 descends and the resin film sheets 303x and 303y are sandwiched between the sponge-shaped heater receivers 491 and thermally welded. Then, a left side end weld portion 303c and a right side end weld portion 303d are formed. At the same time, on the rear end side (the right side in the drawing) of the article 2 to be packaged, the horizontal seal heater 439 descends to thermally weld the resin film sheets 303x and 303y. After that, when the conveyance belt 431 resumes driving, the heat-sealed portion is cut by the lateral seal heater 439, and the rear end side welding portion 303b is completed to complete the packaging, and the packaged article is discharged from the left side in the figure. The In addition, the part already heat-welded by the last packaging operation | movement becomes the front end side weld part 303a.

  However, in the packaging apparatus 201 of this background art, as shown in FIG. 19 (c), the object 2 to be packaged is sandwiched between the driving roller 232 and the pressing driven roller 233 together with the resin film sheet 3, and the vertical seal heater 25, the folded portion 3e may be thermally welded. However, above that, the film forming plate 23 forms an insertion opening 23 a having a width into which the article 2 can be inserted, and the resin film sheet 3 is formed along the forming plate 23. Then, as shown in FIG. 22, it becomes a shape where the space | interval of the resin film sheet 3 becomes narrow as it goes to the conveyance means 231 from the insertion port 23a. In this state, when the vertical seal heater 25 is brought close to the resin film sheet 3 for heat welding, the upper end 25a of the heated vertical seal heater hits the resin film sheet 3 before other portions of the vertical seal heater 25. . As a result, since only the upper end 25a is in contact with the resin film sheet 3 for a long time, there is a problem that a hole may be formed in the resin film sheet 3 at that portion or welding unevenness may occur.

  Further, as shown in FIG. 19B, the lower end of the resin film sheet 3 is heat-sealed in the previous packaging even if it is not sandwiched between the driving roller 232 and the pressing driven roller 233 at the time of heat welding by the vertical seal heater 25. It has become a bag shape. Accordingly, before welding by the vertical seal heater 25, as shown in FIG. 19A, the distance between the resin film sheets 3 becomes narrower toward the lower side, and the same problem occurs.

  Also in the packaging apparatus 401, as shown in FIG. 23, since the article to be packaged 2 is sandwiched between the upper and lower resin film sheets 403 and the conveying belt 431, the upper resin film sheet 303x is closer to the side closer to the film roll 422a. It becomes the form that becomes. In this state, when the vertical seal heater 424 is lowered, the right end 424a of the heated vertical seal heater hits the resin film sheet 3a before other portions of the vertical seal heater 424. As a result, since only the portion of the right end 424a contacts the resin film sheet 3a for a long time, a hole is formed in the resin film sheet 3a in that portion, or welding unevenness occurs.

  In these packaging apparatuses, the resin film sheet is provided with a certain gap on the side where the article to be packaged is inserted so that the article can be inserted. However, since the object to be packaged is sandwiched between conveying means for conveying the object together with the resin film sheet, or the tips are welded to each other in the previous packaging operation, the resin film is closer to the downstream side in the object conveying direction. The sheets are inclined so that the gap between them becomes smaller. Therefore, when the vertical seal heater approaches, the rear end side of the vertical seal heater first hits the resin film sheet because of its structure.

  The present invention has been made in view of such problems, and in a packaging apparatus for covering and packaging a flat article to be packaged with a resin film sheet, no holes are formed in the resin film sheet or uneven welding occurs. An object of the present invention is to provide a packaging device capable of uniformly longitudinally sealing.

  The first configuration of the present invention for solving the above problem is to cover an object to be packaged with a resin film sheet and perform thermal welding of the resin film sheet while moving the object to be packaged together with the resin film sheet for packaging. A vertical sealing means which is a packaging device and is provided so as to be able to contact and be separated from the resin film sheet, and which performs thermal welding by contacting the resin film sheet in a straight line parallel to the moving direction of the packaged article, and the resin film sheet A horizontal sealing means that is provided so as to be able to contact and separate from the resin and that is thermally welded in contact with the resin film sheet in a straight line perpendicular to the moving direction of the package on the rear end side of the package, and the resin film sheet or resin A conveying means for conveying an object to be packaged covered with a film sheet, and the vertical sealing means includes a heater portion formed in a plate shape with the moving direction of the object to be packaged as a longitudinal direction, and a heater unit. A heat insulating portion provided adjacent to at least one end of the heater portion, and configured to block the heat of the heater portion from being transmitted to the resin film sheet side edge of the heat insulating portion. It is a packaging device.

  According to this 1st structure, the heat insulation part is provided adjacent to the at least one end side of a heater part, and it interrupts | blocks that the heat | fever of a heater part is transmitted to the edge by the side of the resin film sheet of this heat insulation part. It is configured. Therefore, when the resin film sheet is not parallel to the edge of the vertical seal heater in the vertical sealing means, and the vertical seal heater advances toward the resin film sheet, if it hits either end of the vertical seal heater first, By disposing the heat insulating portion at the end of the contact, it is possible to prevent the resin film sheet from being perforated or causing welding unevenness.

  A 2nd structure is a packaging apparatus characterized by interrupting | transmitting the heat of a heater part by covering the edge by the side of the resin film sheet of the heat insulation part in a 1st structure with the thin film of a heat insulating material. With this configuration, the heat of the heater part is blocked by a heat insulating material thin film (such as an adhesive tape), and heat can be prevented from being transmitted to the edge of the heat insulating part.

  In the third configuration, at least an edge of the heat insulating portion in the first configuration on the resin film sheet side is made of a material having a lower thermal conductivity than that of the heater portion, thereby blocking transmission of heat from the heater portion. This is a packaging device. This heat insulating material blocks the heat of the heater part and can prevent heat from being transmitted to the edge of the heat insulating part.

  A 4th structure is a packaging apparatus characterized by having a space | gap between the heat insulation part and heater part in a 1st thru | or 3rd structure. This gap, or the gap and the heat insulating material, cuts off the heat of the heater part and can prevent the heat from being transmitted to the edge of the heat insulating part.

  The fifth configuration is characterized in that the edge on the resin film sheet side of the heat insulating portion in the first to fourth configurations and the edge on the resin film sheet side of the heater portion are configured to be flush with each other. It is a packaging device. With this configuration, it is possible to prevent the resin film sheet from coming into contact with one end of the heater portion first, and to contact the resin film sheet uniformly over the entire edge length of the heater portion.

In the sixth configuration, the edge on the resin film sheet side of the heater portion is between the edge on the resin film sheet side of the heat insulating portion in the first to fourth configurations and the edge on the resin film sheet side of the heater portion. The packaging device is characterized in that a step is provided so that the side is closer to the resin film sheet.

It is best that the edge of the heat insulation part and the edge of the heater part are flush with each other, but due to component errors or mounting errors, the edge 25c of the heat insulation part is slightly closer to the resin film sheet side than the edge of the heater part. The case where it is located is considered. In this state, for example, when the resin film sheet is sandwiched between the hard packaged objects, the edge of the heat insulating part abuts the packaged object with the resin film sheet sandwiched during welding, so the edge of the heater part May be separated from the package, resulting in inadequate welding. However, according to this 6th structure, the level | step difference is provided so that the edge by the side of the resin film sheet of a heater part may become near the resin film sheet. That is, since the edge of the heater part protrudes to the resin film sheet side rather than the edge of the heat insulating part, it can be reliably contacted and welded over the entire length of the edge of the heater part.

  The seventh configuration is the first to fourth configurations, wherein the edge on the resin film sheet side of the heat insulating portion and the edge on the resin film sheet side of the heater portion are the edges on the resin film sheet side of the heat insulating portion. The packaging apparatus is characterized in that a step is provided so that the side is closer to the resin film sheet.

  When the vertical seal heater is welded with a resin film sheet sandwiched between a soft heater receiver such as a sponge, this structure completely prevents the resin film sheet from contacting the heater portion before welding. be able to. Although the edge of the heat insulation part protrudes to the resin film sheet side from the edge of the heater part, the heater receiver is made soft, so the edge of the heat insulation part at the time of welding sinks into the heater receiver, so that the heater The edge of the part contacts the resin film sheet over almost the entire length and can be welded uniformly.

An eighth configuration is the packaging apparatus according to any one of the first to sixth configurations, wherein the conveying means is provided on a side where the heater unit is present with respect to the heat insulating unit.

By sandwiching the article to be packaged together with the resin film sheet by the conveying means, the interval between the resin film sheets into which the article to be packaged is inserted gradually becomes smaller toward the conveying means. Therefore, when the vertical seal heater is brought closer in that state, the end on the side farther than the conveying means comes into contact with the resin film sheet first. According to this 8th structure, since this conveyance means is provided in the side in which a heater part exists with respect to a heat insulation part, the heat insulation part is formed in the side far from a conveyance means among vertical seal heaters. become. Accordingly, since the resin film sheet first comes into contact with the heat insulating portion, it is possible to prevent the resin film sheet from being perforated or causing uneven welding.

  A ninth configuration is the packaging apparatus according to any one of the first to eighth configurations, wherein the heat insulating portion is provided adjacent to the upstream side of the heater portion in the movement direction of the packaged object.

Since the articles to be packaged are inserted into the packaging device from the upstream end portion in the conveying direction, a certain interval is provided to facilitate the insertion. Therefore, the distance between the resin film sheets becomes gradually smaller as the distance from the insertion port is increased. Therefore, when the vertical seal heater is brought closer in that state, the end on the upstream side in the package conveying direction comes into contact with the resin film sheet first. According to the ninth configuration, since the heat insulating portion is provided adjacent to the upstream side of the heater unit in the package conveying direction, the resin film sheet first comes into contact with the heat insulating portion first. It is possible to prevent a hole from being formed or uneven welding from occurring.

  A tenth configuration is a packaging device characterized in that, in the ninth configuration, the resin film sheet starts the packaging operation in a state where the tip on the downstream side in the package moving direction is welded by the previous packaging operation. is there.

  Since the resin film sheets are welded at the leading ends, the distance between the resin film sheets gradually becomes smaller toward the leading ends (downstream in the package conveying direction). Therefore, when the vertical seal heater is brought closer in this state, the end farther than the tip, that is, the end on the upstream side in the package conveying direction comes into contact with the resin film sheet first. According to the tenth configuration, since the leading end of the film is welded and the heat insulating part is provided on the upstream side in the package conveying direction, the resin film sheet first comes into contact with the heat insulating part. It is possible to prevent holes from being formed in the sheet and uneven welding from occurring.

  According to an eleventh configuration, in the first to tenth configurations, the heat insulating portion is provided adjacent to the upstream side of the heater unit in the movement direction of the package and the downstream side of the heater unit in the direction of movement of the package. This is a characteristic packaging device.

  Of the upstream end and downstream end of the vertical seal heater to be packaged, it is anticipated that the resin film sheet will be contacted first due to the positional relationship with the insertion port of the package, the conveying means, and the film tip welding. The other end opposite to the one end may come into contact with the resin film sheet earlier than the one end due to deflection of the resin film sheet or the like. According to the eleventh configuration, since the heat insulating portions are provided at both the upstream end and the downstream end of the vertical seal heater, the resin film is not affected by the deflection of the resin film sheet. It is possible to prevent holes from being formed in the sheet and uneven welding from occurring.

  A twelfth configuration is one form of a packaging device to which the first to eleventh configurations are applied, and a film roll that supplies one resin film sheet to the upstream side in the package moving direction of the vertical sealing means. And a film forming member that allows the side ends of one strip-shaped resin film sheet supplied from the film roll to be overlapped and formed into a cylindrical shape, and a flat article to be packaged to be inserted therein. The vertical sealing means is a packaging device characterized in that the folded portion where the side edges of the resin film sheet overlap is heat-welded.

  The thirteenth configuration is one form of the packaging device to which the first to eleventh configurations are applied, and the upstream side of the vertical seal means in the package moving direction is a resin film on the front and back sides of the package, respectively. The packaging apparatus is characterized in that it has two film rolls for supplying sheets, and the vertical sealing means thermally welds the two resin film sheets to each other on both sides of the package.

  Therefore, according to the present invention, there is an effect that it is possible to obtain a packaging device that does not have a hole in the resin film sheet and does not have uneven welding.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings. In addition, the same code | symbol is used for the member and part which have the same shape and function as the packaging apparatuses 201 and 301 of background art.

  FIG. 1 is a front view showing a packaging device 1 of the present invention, and FIG. 2 is a side view thereof. One film roll 22 is rotatably supported above the apparatus, and one strip-shaped resin film sheet 3 is supplied from the film roll 22. A film forming plate 23 is provided on the left side of the film roll 22 in FIG. 2, and an inlet 23 a is formed above the film forming plate 23, so that the resin film sheet 3 extends along the film forming plate 23. By being sent, it is formed into a cylindrical shape. The process of forming into a cylindrical shape is the same as the forming process in the background art already described with reference to FIGS.

  A vertical sealing means 24 is provided below the film forming plate 23. The vertical seal means 24 is provided with a plate-shaped vertical seal heater 25 whose longitudinal direction is the vertical direction. The vertical seal heater 25 is attached to an attachment plate 26 that is formed long in the width direction, and is fixed to one end of a drive rod 27 at both left and right ends of the attachment plate 26. The drive rod 27 is supported by a rod receiver 28, and the other end side is connected to a crank mechanism 29. By driving the crank mechanism 29 with the drive shaft 30, the drive rod 27 is reciprocated in the direction of arrow A shown in FIG. 2, and the vertical seal heater 25 is in contact with or separated from the resin film sheet 3. A driving force is applied to the drive shaft 30 from the motor M1. The vertical seal heater 25 has a heat insulating part 25a and a heater part 25b which is another part on the upstream side in the package conveying direction. A heating means and a thermistor (not shown) are attached to the heater section 25b, and are heated and controlled so as to be close to the target temperature. The heat insulating portion 25a is configured to block heat conduction from the heater portion 25b at least at the edge 25c on the resin film side of the heater portion 25b. Details of this configuration will be described later.

  A conveying means 31 is provided below the vertical sealing means 24. The conveying means 31 is provided with a driving roller 32 to which a driving force is applied from the motor M2 and a pressing driven roller 33 provided so as to be able to contact and separate from the driving roller 32. The pressing driven roller 33 is rotatably supported by a shaft 34, and the shaft 34 is fixed to one end of a drive rod 35 at both left and right ends thereof. The drive rod 35 is supported by a rod receiver 36, and the other end side is connected to a crank mechanism 37. By driving the crank mechanism 37 by the drive shaft 38, the drive rod 35 is reciprocated in the direction of arrow B shown in FIG. When the pressing driven roller 33 moves in a direction approaching the driving roller 32 by this reciprocating movement, the pressing object roller 33 and the driving roller 32 sandwich the packaged article 2 together with the resin film sheet 3 that encloses it, upward or downward. Transport. A driving force is applied to the driving shaft 38 from the motor M3.

  A horizontal sealing means 39 is provided below the conveying means 31. The horizontal sealing means 39 is provided with a horizontal sealing heater 40 longer than the entire width of the cylindrical resin film sheet 3. The horizontal seal heater 40 is attached to a mounting plate 41 that is formed long in the width direction, and is fixed to a pair of side plates 42 at both left and right ends of the mounting plate 41. By reciprocating this side plate 42 in the direction of arrow C shown in FIG. 2 by the slide mechanism 43 and the crank mechanism 44, the lateral seal heater 40 is brought into contact with or separated from the resin film sheet 3. The crank mechanism 44 is driven by a drive shaft 45, and a driving force is applied to the drive shaft 45 from a motor M4. A heater receiver 49 is provided facing the lateral seal heater 40 across the passage of the resin film sheet 3. The resin film sheet 3 is sandwiched between the horizontal seal heater 40 and the heater receiver 49 and thermally welded. This horizontal seal heater 40 is also attached with heating means and thermistor (not shown), and is heated and controlled to be close to the target temperature.

  A first sensor 46 is provided on the upstream side of the horizontal sealing means 39, and a second sensor 47 is provided on the downstream side. The first sensor 46 and the second sensor 47 are optical sensors provided opposite to each other with the passage of the article to be packaged 2 and the resin film sheet 3 interposed therebetween, and can detect the passage of the article to be packaged 2 respectively. It has become. Furthermore, a controller 48 that drives and controls the motors M1, M2, M3, and M4 is provided according to the detection results of these sensors. The heating means and the thermistor affixed to the heater portion 25b of the vertical seal heater 25 and the horizontal seal heater 40 are also connected to the controller 48, and the controller 48 determines the heating means based on the measured temperature result of the thermistor. And the heater is controlled so as to have a temperature suitable for thermal welding of the resin film sheet 3.

  A discharge port 51 is formed below the lateral seal means 39 toward the housing bottom surface 61 side. The discharge port 51 is provided at a position close to one end (the left end in FIG. 2) of the apparatus housing. When the article 2 to be packaged covered by the resin film sheet 3 is sent out downward by the conveying means 31, it protrudes from the lower part of the housing through this discharge port 51 and is cut at the heat welding part to become a package 101 that has been packaged, Fall down.

  A receiving plate 71 (receiving member) is provided below the discharge port 51. The receiving plate 71 is attached to the bottom surface 61 of the casing 51 on the other end side (right side in FIG. 2) of the discharge port 51 so as to receive the package 101 that has dropped from the discharge port 51.

  Since the packaging operation of the packaging device 1 is the same as the packaging operation of the packaging device 201 of the background art described with reference to FIG. 19, the description is omitted, and the heat insulating portion 25a of the vertical seal heater 25, which is an important part in the present invention, Details of the configuration of the heater section 25b and the operation during the vertical sealing operation will be described.

  FIG. 3 is a side view showing the first embodiment of the vertical seal heater 25. FIG. 3 shows only the vertical seal heater 25 when viewed from the same direction as FIG. That is, the right side of the vertical seal heater 25 in FIG. 3 is the side where the resin film sheet 3 is present, and the vertical seal heater 25 moves forward and backward toward the resin film sheet 3. The package 2 moves from the upper side to the lower side in the figure.

  A portion of the vertical seal heater 25 closer to the upper side in the figure is a heat insulating portion 25a, and the other portion is a heater portion 25b. An alternate long and short dash line in the drawing indicates a boundary between the heat insulating portion 25a and the heater portion 25b, and the heat insulating portion 25a and the heater portion 25b are configured by a single common heater plate. This heater plate is maintained at a temperature necessary and sufficient for welding by a heating means. However, the adhesive tape 25e is stuck on the resin film sheet side of the heat insulating portion 25a. The adhesive tape 25e blocks the heat of the heater plate from being transmitted to the edge 25c (hereinafter simply referred to as the edge 25c) of the heat insulating portion 25a on the resin film sheet side (right side in the drawing). Accordingly, the edge 25c of the heat insulating portion 25a is at a lower temperature than the edge 25d (hereinafter simply referred to as the edge 25d) of the heater portion 25b on the resin film sheet side (right side in the drawing).

  FIG. 4 is a view showing an operation in which the vertical seal heater advances to the resin film sheet 3 side and welds the folded portion 3e with the resin film sheet 3 sandwiched between the object 2 to be packaged. When the vertical seal heater 25 moves to the right in the drawing, the upper end portion of the edge 25c in the drawing first contacts the resin film sheet 3 as shown in FIG. After that, as shown in FIG. 4B, the vertical seal heater 25 continues to move while the upper end of the edge 25c is in contact with the resin film sheet 3, but the adhesive tape 25e is affixed to the heat insulating portion 25a. Therefore, since the edge 25c is colder than the edge 25d of the heater portion 25b, no hole is opened at the contact portion with the upper end of the edge 25c of the resin film sheet 3. When the vertical seal heater 25 further moves, the vertical seal heater 25 sandwiches the resin film sheet 3 between the packaged objects 2 as shown in FIG. 4C, and the edges 25c and 25d are entirely attached to the resin film sheet 3. Contact. The heater portion 25b is heated to a temperature sufficient for the resin film sheet 3 to be welded. Accordingly, the resin film sheet 3 is welded at the abutting portion when the edge 25d abuts the resin film sheet 3. .

  As described above, when the vertical seal heater 25 advances toward the resin film sheet 3, first, the edge 25 c of the heat insulating portion 25 a that is a low temperature portion and the resin film sheet 3 come into contact with each other. Then, the edge 25d of the heater portion 25b, which is a high-temperature portion sufficient for welding, is brought into contact with the entire edge 25d immediately before the resin film sheet 3 is sandwiched with the packaged object 2. Therefore, since the portion which hits first is a low temperature part, a hole is not opened by heat and welding nonuniformity does not occur.

  In this embodiment, the edge 25d is sufficiently brought into contact with the resin film sheet 3, so that the heater plate is formed so that the edge 25c and the edge 25d are flush with each other after the adhesive tape 25e is applied. good. That is, as shown in FIG. 3B, the edge 25j where the adhesive tape 25e is applied is preferably shifted to the left in the figure by the thickness of the adhesive tape 25e.

  The material of the adhesive tape 25e is desirably a material having high heat resistance and heat insulation, and examples thereof include fluororesin, mica, glass fiber, and silicon film.

  Next, a second embodiment of the vertical seal heater 25 will be described. FIG. 5 is a side view showing a second embodiment of the vertical seal heater 25. FIG. 5 also shows only the vertical seal heater 25 as viewed from the same direction as FIG.

  The hatched portion of the vertical seal heater 25 on the upper side in the figure is the heat insulating portion 25a, and the other portion is the heater portion 25b. The heater portion 25b is composed of a heater plate that is heated by a heating means and maintained at a temperature necessary and sufficient for welding. On the other hand, the heat insulation part 25a is comprised with the material whose heat conductivity is lower than the heater part 25b, and has interrupted | transmitting the heat of the heater part 25b. Accordingly, the edge 25c of the heat insulating portion 25a is at a lower temperature than the edge 25d of the heater portion 25b.

  The material of the heat insulating portion 25a is preferably a material having high heat resistance and high heat insulating properties, and examples thereof include fluororesin, ceramic, glass fiber and the like.

The heat insulating portion 25a and the heater portion 25b are configured to be adjacent to each other by being fixed to the connecting plate 25f. In addition, the edge 25d is configured to be flush with the resin film sheet 3 so that the edge 25d and the edge 25d are flush with each other.

  When the vertical seal heater 25 advances toward the resin film sheet 3, as in the first embodiment, first, the edge 25 c that is a low temperature portion and the resin film sheet 3 come into contact with each other, and then the resin is placed between the packaged objects 2. Immediately before the film sheet 3 is sandwiched, the entire edge 25d abuts. Therefore, since the portion which hits first is a low temperature part, a hole is not opened by heat and welding nonuniformity does not occur.

  Next, a third embodiment of the vertical seal heater 25 will be described. FIG. 6 is a side view showing a third embodiment of the vertical seal heater 25. FIG. 6 also shows only the vertical seal heater 25 as viewed from the same direction as FIG.

  As shown in FIG. 6A, the vertical seal heater 25 of the third embodiment has a gap between a heat insulating portion 25a that is a hatched portion closer to the upper side of the drawing and a heater portion 25b that is the other portion. 25g is provided. The heater portion 25b is composed of a heater plate that is heated by a heating means and maintained at a temperature necessary and sufficient for welding. On the other hand, the heat insulation part 25a is comprised with the material whose heat conductivity is lower than the heater part 25b. The heat insulating part 25a and the heater part 25b are both fixed to the connecting plate 25f so that a gap 25g is formed between them. In addition, the edge 25c and the edge 25d are configured to be flush with each other so that the edge 25d sufficiently contacts the resin film sheet 3.

  The heat of the heater plate is blocked from being transmitted from the edge 25d to the edge 25c by the action of the material of the heater plate and the gap 25g. Therefore, the edge 25c has a lower temperature than the edge 25d.

  Further, the third embodiment may be configured as shown in FIG. In the vertical seal heater 25 shown in FIG. 6 (b), the upper portion in the drawing is the heat insulating portion 25a, and the other portion is the heater portion 25b. An alternate long and short dash line in the drawing indicates a boundary between the heat insulating portion 25a and the heater portion 25b, and the heat insulating portion 25a and the heater portion 25b are configured by a single common heater plate. A notch is made in this one heater plate, and a gap 25g is formed between the heat insulating portion 25a and the heater portion 25b. Since the heating means (not shown) is provided in the heater 25b, the gap 25g makes it difficult for heat to be transmitted to the heat insulating portion 25a.

  In addition, an adhesive tape 25e is affixed to the resin film sheet side of the heat insulating portion 25a. The adhesive tape 25e blocks the heat of the heater plate from being transmitted to the edge 25c of the heat insulating portion 25a. Therefore, the edge 25c has a lower temperature than the edge 25d due to the action of the gap 25g and the adhesive tape 25e. Moreover, in order for the edge 25d to contact | abut to the resin film sheet | seat 3 fully, it is comprised so that the edge 25c and edge 25d after sticking the adhesive tape 25e may become flush.

  When the vertical seal heater 25 advances toward the resin film sheet 3, first, the edge 25 c that is a low-temperature portion and the resin film sheet 3 come into contact with each other, and then between the packaged objects 2, as in the first and second embodiments. Immediately before the resin film sheet 3 is sandwiched, the entire edge 25d is brought into contact. Therefore, since the portion which hits first is a low temperature part, a hole is not opened by heat and welding nonuniformity does not occur.

Next, a fourth embodiment of the vertical seal heater 25 will be described. FIG. 7 is a side view showing a fourth embodiment of the vertical seal heater 25. FIG. 7 also shows only the vertical seal heater 25 as viewed from the same direction as FIG.

In the vertical seal heater 25 of the fourth embodiment, a step 25h is formed between the edge 25c of the heat insulating portion 25a and the edge 25d of the heater portion 25b so that the edge 25d is closer to the resin film sheet than the edge 25c. Has been. Others are the same as in the second embodiment.

  FIG. 8 shows a state in which the vertical seal heater 25 of the fourth embodiment has advanced to the resin film sheet 3 side and is in contact with the packaged object 2 with the folded portion 3e of the resin film sheet 3 being sandwiched therebetween. FIG. Even if the edge 25c and the edge 25d are flush with each other, if the edge 25c is positioned slightly on the right side of the figure due to a component error or the like, the heat insulating portion 25a will contact the package 2 with the resin film sheet 3 interposed therebetween. Even if it comes into contact, the edge 25d of the heater portion 25b is slightly separated from the package 2 and as a result, welding may be insufficient. However, since the vertical seal heater 25 of the fourth embodiment has the step 25h, it can be reliably contacted and welded over the entire length of the edge 25d of the heater portion 25b. Also. When the vertical seal heater 25 advances toward the resin film sheet 3, this step is formed to be sufficiently small so that a hole is not opened in the resin film sheet 3 by the edge 25 d, for example, the dimension is 1 mm or less.

  In addition, although this 4th Embodiment was set as the structure which the heat insulation part 25a and the heater part 25b adjoined similarly to 2nd Embodiment, the resin film sheet side of the heat insulation part 25a similarly to 1st Embodiment An adhesive tape may be affixed to the edge, or a gap may be provided between the heat insulating part 25a and the heater part 25b as in the third embodiment.

  Returning to FIG. 2, the conveying means 31 is provided on the downstream side (the lower side in the figure) in the package conveying direction with respect to the vertical seal heater 25. Therefore, the conveying means 31 is provided on the side where the heater portion 25b exists with respect to the heat insulating portion 25a in the first to fourth embodiments. Therefore, the object to be packaged 2 is sandwiched together with the resin film sheet 3 by the conveying means 31, and the distance between the resin film sheets 3 into which the object to be packaged 2 is inserted becomes gradually smaller from the upper insertion port toward the conveying means 31. In this state, the first to fourth embodiments of the present invention can eliminate the problem caused by the upper end of the vertical seal heater 25 hitting the resin film sheet 3 first.

  Moreover, the resin film sheet 3 is in a state of being welded in the previous packaging operation at the downstream end (the lower end in the drawing) on the downstream side of the packaged object conveyance direction. Therefore, even if it is not clamped by the conveyance means 31, the space | interval of the resin film sheets 3 in which the to-be-packaged goods 2 are inserted becomes small gradually toward the conveyance means 31 toward the lower end welded from the upper insertion port. It becomes a state. Even in this state, there is a problem that the upper end of the vertical seal heater 25 first hits the resin film sheet 3 according to the first to fourth embodiments in which the heat insulating portion is provided upstream of the vertical seal heater 25 in the package conveyance direction. Can be eliminated.

  Furthermore, as shown in FIG. 13, in addition to the heat insulation part 25a of the longitudinal seal heater 25 at the upstream side end in the package conveyance direction, a heat insulation part 25m may be provided at the downstream side edge in the package conveyance direction. . When the resin film sheet 3 may come into contact with the lower end portion of the vertical seal heater 25 first due to slackness of the resin film sheet 3 or the like, the present embodiment in which the heat insulating portions are provided at the upper and lower ends of the vertical seal heater 25 Even at the lower end portion of the vertical seal heater 25, it is possible to prevent the resin film sheet 3 from being perforated or causing uneven welding.

  Next, a packaging apparatus 501 according to another embodiment of the present invention is shown in FIG. Since the packaging device 501 is exactly the same as the packaging device 401 shown in FIG. 21 except for the configuration of the vertical seal heater 524, the detailed configuration and operation description are omitted, and only the configuration of the vertical seal heater 524 is described. .

  FIG. 10 is a view showing the configuration of the vertical seal heater 524. FIG. 10 shows only the vertical seal heater 524 when viewed from the same direction as FIG. That is, the lower side of the vertical seal heater 524 in FIG. 10 is the side where the resin film sheets 303x and 303y exist, and the vertical seal heater 524 moves forward and backward toward the resin film sheets 303x and 303y. The package 2 moves from the right side to the left side in the figure. Further, the vertical seal heater 524 is provided on both sides of the packaged object 2 in the direction orthogonal to the conveyance direction.

The hatched portion on the right side of the vertical seal heater 524 in the drawing is the heat insulating portion 524a, and the other portion is the heater portion 524b. The heater part 524b is composed of a heater plate heated by a heating means and maintained at a temperature necessary and sufficient for welding. On the other hand, the heat insulation part 524a is made of a material having a lower thermal conductivity than the heater part 524b, and blocks heat from the heater part 524a from being transmitted. Accordingly, the edge 524c (hereinafter simply referred to as edge 524c) of the heat insulating portion 524a on the resin film sheet side (lower side in the drawing) is compared with the edge 524d (hereinafter simply referred to as edge 524d) on the resin film sheet side (the lower side in the drawing) of the heater portion 524b. Becomes low temperature.

  The material of the heat insulating portion 524a is the same as that of the heat insulating portion 25a of the vertical seal heater 25 of the packaging device 1, and is preferably made of fluororesin, ceramic, glass fiber or the like having high heat resistance and heat insulating properties.

The heat insulating part 524a and the heater part 524b are configured to be adjacent to each other by being fixed to the connecting plate 524f. Further, the edge 524c and the edge 524d are configured to be flush with each other.

  When the vertical seal heater 524 advances toward the resin film sheets 303x and 303y, the edge 524c, which is a low temperature portion, first comes into contact with the resin film sheet 303x, and then the heater receiver 491, like the vertical seal heater 25 of the packaging device 1. Immediately before the resin film sheets 303x and 303y are sandwiched between them, the entire edge 524d is brought into contact, so that there is no possibility that a hole is opened by heat or uneven welding occurs.

  As shown in FIG. 11, the vertical seal heater 524 has a step 524k between the edges 524c and 524d so that the edge 524c is closer to the resin film sheet than the edge 524d. good. 11 indicates the resin film sheet 303x immediately before the vertical seal heater 524 advances toward the heater receiver 591 and the edge 524c reaches the heater receiver 591. According to this configuration, it is possible to completely prevent the resin film sheet 303x from contacting the end of the edge 524d on the heat insulating portion side (right side in the drawing) before welding. Since the edge 524c is sunk into the sponge-like heater receiver 591, the heater portion 524d can be in contact with the resin film sheets 303x and 303y over almost the entire length thereof and can be uniformly welded.

  As shown in FIG. 12, in addition to the configuration of FIG. 11, a heat insulating portion 524m is provided on the downstream side in the package conveying direction, and the edge 524n on the resin film sheet side of the heat insulating portion 524m is more resin resin sheet than the edge 524d. A step 524p may be formed on the side. The dashed line in FIG. 12 indicates the resin film sheet 303x immediately before the vertical seal heater 524 advances toward the heater receiver 591 and the edge 524c reaches the heater receiver 591. According to this structure, in addition to the heat insulation part side of the edge 524d, it is possible to completely prevent the resin film sheet 303x from contacting the end opposite to the heat insulation part side (the left side in the drawing) before welding. Accordingly, the resin film sheet 303x comes into contact with the edges 524c and 524n and reaches the heater receiver 591 in a state in which the heater portion 524d and the resin film sheet 303x are parallel as shown by the alternate long and short dash line in FIG. Since the edge 524c is recessed into the heater receiver 591, it can contact and weld to the resin film sheets 303x and 303y more uniformly over almost the entire length of the heater portion 524d.

  The vertical seal heater 524 of the packaging device 501 may be in a state in which an adhesive tape is attached to the heat insulating portion 524a, as in the first embodiment of the vertical seal heater 25 of the packaging device 1. Similarly to the third embodiment of the vertical seal heater 25, a gap may be provided between the heat insulating portion 524a and the heater portion 524b. Further, as in the fourth embodiment of the vertical seal heater 25 of the packaging device 1, a step is formed between the edge 524c and the edge 524d so that the edge 524d is closer to the resin film sheet than the edge 524c. May be. According to this form, although it is impossible to completely prevent the resin film sheet 303x from contacting the end of the edge 524d on the heat insulating portion side as shown in FIGS. 11 and 12 before welding, By making the size smaller than 1 mm, the resin film sheet 303x can be prevented from coming into contact with the end of the edge 524d on the heat insulating portion side until the edge 524d reaches the heater receiver 591. It is possible to obtain the effect of the present invention that no hole is formed in the metal plate and welding unevenness does not occur.

It is a front view which shows the packaging apparatus 1 of this invention. It is a side view which shows the packaging apparatus 1 of this invention. 2 is a side view showing a first embodiment of a seal heater 25. FIG. It is a figure which shows the operation | movement in which the vertical seal | sticker heater advances to the resin film sheet 3 side, and welds the folding part 3e on both sides of the resin film sheet 3 between the to-be packaged objects 2. FIG. It is a side view which shows 2nd Embodiment of the vertical seal | sticker heater 25. FIG. It is a side view which shows 3rd Embodiment of the vertical seal | sticker heater 25. FIG. It is a side view which shows 4th Embodiment of the vertical seal | sticker heater 25. FIG. It is a figure which shows the state which the vertical seal | heater heater 25 of 4th Embodiment advanced to the resin film sheet 3 side, and has pinched | interposed the folding part 3e of the resin film sheet 3 between the to-be packaged objects 2. FIG. It is a figure which shows the packaging apparatus 501 of another form of this invention. It is a figure which shows the structure of the vertical seal | sticker heater 524. It is a figure which shows another structure of the vertical seal | sticker heater 524. It is a figure which shows another structure of the vertical seal | sticker heater 524. 5 is a side view showing another configuration of the vertical seal heater 25. FIG. 2 is a perspective view showing a package 101. FIG. It is a front view which shows the packaging apparatus 201 of background art. It is a side view which shows the packaging apparatus 201 of background art. It is the expanded view and structure figure of the film forming board 23 of the packaging apparatus 1 of this invention, and the packaging apparatus 201 of background art. FIG. 4 is a diagram showing a situation where a belt-shaped resin film sheet is formed into a cylindrical shape by a film forming plate 23. It is a figure which shows the packaging operation | movement in the packaging apparatus 201 of background art. It is a perspective view which shows the package 301. FIG. It is a front view which shows the packaging apparatus 401 of background art. It is a figure which shows the state of the resin film sheet 3 just before performing vertical seal | sticker in the packaging apparatus 201 of background art. It is a figure which shows the state of the resin film sheet 303x just before performing vertical sealing in the packaging apparatus 401 of background art.

Explanation of symbols

1,501; packaging device (present invention)
2; Packaged items 3, 303x, 303y; Resin film sheet 3e; Folding portion 3g; Vertical seal portion 24; Vertical seal means 25, 424, 524; Vertical seal heaters 25a, 25m, 524a: Thermal insulation portions 25b, 524b; Heaters 25c, 25d, 25j, 25n, 524c, 524d; edge 25e; adhesive tapes 25f, 524f; connecting plate 25g; gaps 25h, 524k, 524p; steps 31, 231, 431; , 233; pressing driven roller 491; heater receiver 51; discharge port 71; receiving plate 101, 301; packaging body 201, 401;
A, B, C; arrows M1, M2, M3, M4; motor

Claims (13)

  A packaging device that covers a packaged article with a resin film sheet, and performs thermal welding of the resin film sheet while wrapping the packaged article together with the resin film sheet, and can be separated from the resin film sheet. A vertical sealing means that is provided in contact with the resin film sheet in a straight line parallel to the moving direction of the packaged object, and is provided so as to be able to contact and separate from the resin film sheet; A horizontal sealing means for contacting and heat-welding the resin film sheet in a straight line perpendicular to the moving direction of the object to be packaged on the side, and a conveying means for conveying the resin film sheet or the object to be packaged covered by the resin film sheet. The vertical sealing means is provided adjacent to at least one end side of the heater portion formed in a plate shape in which the moving direction of the packaged object is the longitudinal direction. And a heat insulating unit, the packaging apparatus characterized by being configured to block the heat of the heater unit is transmitted to the resin film sheet side edge of the heat insulating portion.   The packaging apparatus according to claim 1, wherein the heat of the heater part is blocked by covering an edge of the heat insulating part on the resin film sheet side with a thin film of a heat insulating material.   The heat transfer of the heater part is blocked by forming at least the edge of the heat insulating part on the resin film sheet side with a material having a lower thermal conductivity than the heater part. The packaging device described.   The packaging device according to any one of claims 1 to 3, wherein a gap is provided between the heat insulating portion and the heater portion.   The edge on the resin film sheet side of the heat insulating part and the edge on the resin film sheet side of the heater part are configured to be flush with each other. Packaging equipment. Between the resin film sheet side edge of the heat insulating part and the resin film sheet side edge of the heater part, the resin film sheet side edge of the heater part is closer to the resin film sheet, The packaging device according to any one of claims 1 to 4, wherein a step is provided.   Between the edge on the resin film sheet side of the heat insulation part and the edge on the resin film sheet side of the heater part, the edge on the resin film sheet side of the heat insulation part is closer to the resin film sheet, The packaging device according to any one of claims 1 to 4, wherein a step is provided.   The packaging device according to any one of claims 1 to 7, wherein the conveying means is provided on a side where the heater portion is present with respect to the heat insulating portion.   The heat insulation part is provided adjacent to the package moving direction upstream of the heater part and the downstream of the heater part moving direction of the package, according to any one of claims 1 to 8. The packaging device described.   The packaging device according to any one of claims 1 to 9, wherein the heat insulating portion is provided adjacent to the upstream side of the heater portion in the moving direction of the package.   The packaging apparatus according to claim 10, wherein the resin film sheet starts the packaging operation in a state in which a tip on the downstream side in the package moving direction is welded by the previous packaging operation.   On the upstream side in the package moving direction of the vertical sealing means, a film roll for supplying one resin film sheet, and the side ends of one strip-shaped resin film sheet supplied from the film roll are overlapped to form a cylinder. And a film forming member that allows a flat packaged object to be inserted therein, and the vertical sealing means heat-welds the folded portion where the side edges of the resin film sheets overlap each other The packaging device according to claim 1, wherein   On the upstream side in the package moving direction of the vertical seal means, there are two film rolls for supplying resin film sheets to the front side and the back side of the package object, respectively, and the vertical seal means is provided on both sides of the package object. The packaging apparatus according to any one of claims 1 to 11, wherein the two resin film sheets are thermally welded to each other.

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