JP5402526B2 - Heat seal packaging equipment - Google Patents

Description

  The present invention relates to a heat seal packaging apparatus that covers a film drawn from a film roll on an object to be packaged placed on a base material, and heat-welds the edge of the film to the surface of the base material for packaging.

  There is an overlap-type packaging method in which an entire package and the tray are covered with a film, and an end portion of the film is folded on the bottom side of the tray for packaging (for example, see Patent Document 1).

However, since the container (tray) used in this overlap type packaging is a container in which a recess is formed, when the container is taken out and discarded after being used, the bulk increases and the amount of waste is reduced. There is a problem that it cannot contribute to the development.
Moreover, since the circumference | surroundings of a tray are packaged, the film used will also increase. Therefore, for example, a method of placing a package on a thin tray and covering the film and heat-sealing the periphery of the upper surface of the tray and the film can be considered, but the film feed method of the conventional overlap type packaging method is adopted. In this case, since both sides of the film are also gripped and transported by a film gripper or the like, it is conceivable that the portion protrudes from the tray and does not look good.

JP 2003-2304 A

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a heat seal packaging apparatus that can contribute to reducing the amount of garbage and can package an article to be packaged with a good appearance. To do.

In order to achieve the above object, the heat seal packaging device of the present invention comprises a base material placing portion for placing a substantially flat base material for placing an article to be packaged, and a film to be placed on the article to be packaged on the foundation material. A film roll arrangement section for feeding the film, a film feed means for drawing a film from the film roll arranged in the film roll arrangement section for a predetermined length, and a suction for holding the film drawn by the film feed means above the base material placement section And a moving means for relatively moving the suction means or the base material placing portion so as to cover the article to be packaged on the base material with the film sucked and held by the suction means, and a film covering the article to be wrapped A heater part that is thermally welded to the surface of the base material on which the package is placed, and the suction part of the suction means is located inside the heater part. The constitution (claim 1).
The base material is made of paper, resin (for example, resin sheet, foamed resin sheet, resin plate, etc.), thin wooden board, laminated sheet with different materials bonded together, etc. In some cases, surface treatment (resin lamination, coating treatment, etc.) that enables thermal welding is performed. The surface of the base material may be plain (white), but the product may be conspicuous by using a colored or printed pattern according to the product to be placed.

The film covering the surface of the packaged object is not limited to a stretch film, and may be a film having no elasticity (for example, a polypropylene film).
The film feed means grips the leading end of the film connected to the film roll arranged in the film roll arrangement part and pulls it out for a predetermined length, and stretches and holds the drawn film above the base material placing part. May be any of a system in which a member for gripping the leading edge of the film is moved, a system in which both sides of the film in the width direction are sandwiched by upper and lower belts that rotate endlessly, and the film is pulled out by driving the belt.

The suction means for sucking and holding the film drawn out by the film feeding means stretches and holds the whole film substantially horizontally until the peripheral portion of the drawn film is thermally welded by the heater portion, and sucks the film. The form of the suction portion may be any of a hollow frame structure that adsorbs the four sides around the front and rear portions of the drawn film and the widthwise left and right sides of the film, or a perforated flat plate structure that sucks the entire packaging region of the drawn film. In the case of a flat plate structure, the flat plate on which the intake air acts is formed by an elastic member that expands and contracts by contact with the package.
And the suction part of this suction means is arrange | positioned inside the heater part which heat-welds a film to a base material.

In order to cover the film stretched and held by the film feed means and the suction means on the package on the base material placed on the base material placing portion, the film feed means or the base material placing portion is moved by the moving means. The movement method is appropriately selected depending on the member to be moved (film feed means or base material placing portion), and the drive may be either electric or manual. For example, when the film feed means and the suction means are fixed at a predetermined height position and the base material placing portion is pushed up from below with respect to the film stretched and held by the film feed means and the suction means for packaging, the base material placing portion Either a method of swinging up and down in a substantially horizontal state or a method of vertically moving a base material mounting portion in a substantially horizontal state may be used.
Alternatively, the base material placing part may be fixed at a predetermined height, and the suction means and the heater part that stretches and holds the film with respect to the base material placing part may be lowered to thermally weld the film to the base material.

  In addition, the heater part heat-welds the edge of the film covering the package to the base material, and the form of the heat-welding is basically a form in which the four sides are heat-welded along the outer shape (for example, a rectangle) of the base material. However, depending on the package, only two opposite sides or only three sides may be heat welded.

  According to the above means, a flat base material on which an article to be packaged is placed is placed on the base material placing portion, the film feed means is operated to pull out the film from the film roll for a predetermined length, and the drawn film is sucked by the suction means. It is stretched and held substantially horizontally, and the film feed means or the base material placing portion is relatively moved to cover the package on the base material with the film, and the edge of the film outside the package is heated. It can be thermally welded to the surface of the base material at the part. And since the film is held by the suction part of the suction means located inside the heater part, the position of heat welding by the heater part is near the side edge in the width direction of the film, and the drawing direction of the film is the distance between the heater members. Can be substantially the same. Thereby, the amount which protrudes outside from the heat-welded part of the film to be packaged can be reduced, and packaging with good appearance can be realized. In addition, the object to be packaged placed on the flat base material is covered with a film, and the periphery of the film is thermally welded to the surface of the base material, whereby the object to be packaged can be stably held on the base material. And since the to-be-packaged object covered with a film protrudes upwards from the heat welding part (base material) surface, it becomes easy to see a to-be-packaged object (product). Moreover, since the base material which mounts a to-be-packaged object is flat form, it can contribute largely to weight reduction compared with the container (tray) provided with the recessed part.

The film feed means includes a film tip clamp portion that slides back and forth in the direction of drawing out the film, and the clamp portion is opened by the forward movement of the clamp portion to a position where the film tip waits, thereby pinching the film tip. The film is pulled out by the backward movement of the film end clamp part (claim 2).
Specifically, for example, one of the upper and lower members (lower member) constituting the clamp portion is automatically opened and closed in conjunction with the forward movement of the film tip clamp portion, and the film tip is attached by the upper and lower members.
Further, the operation of sliding the film leading end clamp portion along the drawing direction of the film may be either an automatic method using a motor or a cylinder or a manual method.

  According to the above means, the film front end clamping part can be clamped and pulled out and expanded only by reciprocating to the position where the film front end waits.

The suction means includes a double box frame formed by an outer box and an inner box, and an electric fan for generating a suction force in a space formed by the double box frame, and the outer box has a rectangular bottom surface in plan view Is an open box, and at least one side of the side wall is a movable side wall whose distance from the opposite side wall can be varied, and the inner box is opened with two box frames open on one side and the bottom of the side wall. The side faces are fitted face to face so that they can be extended and contracted, and one box frame is supported so that it can move up and down while maintaining a certain distance (suction part) from the side wall other than the movable side wall of the outer box. The other box frame is supported so that it can move up and down while maintaining a constant distance (suction part) between the box and the heater, and a heater part is provided below the side wall of the outer box and the lower part of the movable side wall. (Claim 3).
Examples of the means for moving the movable side wall include a ball screw mechanism.

  According to the above means, by moving the movable side wall, it is possible to enlarge / reduce the area of the suction part without affecting the suction part at regular intervals. Thereby, the film pulled out according to the size of the base material can be reliably sucked and held.

Moreover, you may provide the isolation | separation means which isolate | separates the film thermally welded by the crimping | compression-bonding of the said heater part, and the said heater part.
In this case, the separating means is arranged in the vicinity of the heater portion and is urged by an elastic member so as to protrude from the surface of the heater portion in contact with the film. The vicinity of the heater portion in which the separating means is arranged includes, for example, the inside of the suction portion of the suction means, and specifically, it is integrally formed at the lower end of the box frame supported by the movable side wall constituting the suction means ( Claim 6). The separating means arranged in the suction part moves so that the elastic member is compressed and the separating means does not interfere with the pressure bonding between the heater part and the film when the film placed on the base material is pressure-bonded to the heater part. By releasing the pressure bonding between the portion and the film, the separating means is projected by the elastic force of the elastic member.

According to the above means, the film is pressure-bonded to the heater portion and thermally welded to the base material. At this time, the heat-welded film may remain attached to the heater portion. However, by providing the separating means, it is possible to prevent the film from adhering to the heater portion and not being peeled off.
Further, since the separating means is disposed in the vicinity of the heater portion and is urged by an elastic member so as to protrude from the surface of the heater portion, even if a film adheres to the heater portion, the film is not removed from the surface of the heater portion. It is forcibly separated from the surface of the heater by the protruding separating means. Therefore, when the heat sealing is completed, the separation means automatically protrudes by the elastic force of the elastic member without performing any special operation at that time, and the film is separated from the heater portion, and the film remains attached to the heater portion. Can be reliably prevented, and the heat-sealed package can be taken out smoothly.

Further, it may have a film cut length selection means for selecting a film length to be pulled out by the film feed means, and the area of the suction portion of the suction means can be changed according to the selection length of the film cut length selection means. (Claim 7). The film length as used in the field of this invention means the length of the direction pulled out from a film roll.
The film cut length selection means, for example, allows the film feed means to select several types of cut lengths according to the moving distance from the initial position. Specifically, the first cut length is the position of a preset number of pulses from the initial position sensor of the stepping motor that drives the film feed means, the second cut length is the position of the end point position sensor, etc. .

  According to the above means, the area of the suction portion of the suction means is expanded or reduced according to the film cut length, so that the film having the selected length is securely held by the suction means. Therefore, heat welding by the heater portion can be performed stably.

Further, the heater portion is configured in a substantially rectangular shape in plan view with a plurality of heater members, and supports all or a part of the heater members so as to be movable, and according to the selection length of the film cut length selection means It is possible to change the heat-welding area of the heater section (claim 8).
As the moving structure of the heater part, for example, the heater member is arranged in a substantially U shape in a plan view to constitute a fixed frame, and the heater member is moved at a substantially right angle between two parallel sides of the fixed frame. Arrange as possible. The position of the movable heater member is variable according to the selection length of the film cut length selection means.

  According to the above means, the area to be heat-welded by the heater portion is expanded or reduced according to the film cut length, so that the vicinity of the end in the length direction can be ensured regardless of whether the film length is short or long. Can be heat-welded.

Further, the moving means is a mechanism that presses the base material placing portion against the film sucked and held by the suction means from below (Claim 9).
The method of pressing the base material placing part against the suction means for sucking and holding the film from below is a method of moving the base material placing part on an arc while horizontally supporting the base material placing part, or the base material placing part is horizontally Any method may be used, such as a method of moving in the vertical direction while being supported.

  According to the above means, the base material placing portion on which the base material is placed is raised from below and pressed against the film with respect to the film drawn by a predetermined length by the film feed means and sucked and held substantially horizontally by the suction means. Since the article to be packaged that has completed the heat seal packaging returns to the initial position below, the article to be packaged can be taken out smoothly.

According to the heat seal packaging device of the present invention, the amount of the heat sealing packaging device that protrudes outside the heat-welded portion of the film to be packaged can be reduced, and the packaging with good appearance can be achieved. In addition, the object to be packaged placed on the flat base material is covered with a film, and the periphery of the film is thermally welded to the surface of the base material, whereby the object to be packaged can be stably held on the base material. And since the to-be-packaged object covered with a film protrudes upwards from the heat welding part (base material) surface, it becomes easy to see a to-be-packaged object (product), and can improve a commercial value. Moreover, since the base material which mounts a to-be-packaged object is flat form, it can contribute largely to weight reduction compared with the container (tray) provided with the recessed part.
According to the second aspect of the present invention, the film leading end is clamped and the film leading end clamp portion can be reliably pulled out and stretched only by reciprocating the film leading end clamping portion to the position where the film leading end waits.
According to the third aspect of the present invention, it is possible to enlarge / reduce the area of the suction portion without affecting the suction portions at regular intervals. Thereby, the film pulled out according to the size of the base material can be reliably sucked and held.

Further, according to the configuration of the fourth aspect, it is possible to prevent the film from adhering to the heater portion and becoming difficult to peel off.
Further, when the heat sealing is completed, the separating means protrudes by the elastic force of the elastic member to separate the film from the heater portion when the heat sealing is completed. The package after completion of sealing can be easily obtained.
According to the seventh aspect of the present invention, since the area of the suction portion of the suction means is expanded or reduced according to the film cut length, the film having the selected length is reliably held by the suction means. Therefore, heat welding by the heater portion can be performed stably.

Further, according to the structure of claim 8, since the region to be thermally welded by the heater portion is expanded or reduced according to the film cut length, the end portion in the length direction can be used regardless of whether the film length is short or long. The vicinity can be reliably heat-welded.
In addition, according to the ninth aspect of the present invention, since the object to be packaged that has completed the heat seal packaging returns to the initial position below, the object to be packaged can be taken out smoothly.

The perspective view which shows an example of embodiment of the heat seal packaging apparatus which concerns on this invention. The same perspective view which removed the film roll arrangement | positioning part, the guide plate, etc., and showed the suction means. The front view. The same part notch top view. The movement means of a base material mounting part is shown, (a) shows the state of an initial position (lower limit position), (b) shows the state in which the base material mounting part is going up. The perspective view which shows the structure of a suction means and a heater part. In the bottom view, (a) shows a state where the partition wall is set at the first position, and (b) shows a state where the partition wall is moved to the second position. The longitudinal section in the state where the film was sucked and held by the suction means. The same sectional drawing of the state which raises a base material mounting part and makes it contact | abut to the film hold | maintained by adsorption | suction, and is heat-sealed (thermal welding). The same sectional view in the state where the base material placing part was lowered after heat sealing. The cutter which cut | disconnects a film is shown, (a) is a top view, (b) is a longitudinal cross-sectional view. FIG. 6 shows a film tip clamping operation by a film tip clamp portion of the film feed means, where (a) shows a state where the movable lower plate is opened, and (b) shows a case where the film tip is attached by closing the fixed upper plate and the movable lower plate. State, (c) is the state where the film is pulled out. Explanatory drawing which shows the releasing mechanism of a film front end clamp part. The block diagram of an electric mechanism part. The figure which shows the structure of a packaging file. The flowchart figure which shows the flow of the packaging operation | movement of the heat seal packaging apparatus shown in FIG.

Hereinafter, an example of an embodiment of a heat seal packaging device of the present invention will be described with reference to the drawings.
The heat seal packaging apparatus A shown in FIGS. 1 to 3 places an article W to be packaged on a flat base material, covers the article W with a stretch film, and covers the outer edge of the film W from the article W. An electric drive type heat seal packaging apparatus is shown that heat seals and wraps on the surface of a base material to pull out a film to be wrapped on a package W and perform up / down movement of sealing processing by motor drive.
In the heat seal packaging apparatus A, a base material placing part 2 is supported on a base 1 so as to be vertically movable by a moving means 3, and is placed on the base material placing part 2 at a position above the base material placing part 2. A film roll disposing unit 4 for supplying a film to be covered on the article W to be packaged on the base material 9 that is raised and a film feed means 6 for pulling out the film 5a from the film roll 5 of the film roll disposing unit 4 by a predetermined length; A suction means 7 that horizontally stretches and holds the film 5a drawn out by the film feed means 6 above the base material placing portion 2; and an edge of the film 5a that covers the article W to be packaged by raising the base material placing portion 2 A heater portion 8 for heat-welding to the surface of the base material is arranged.

  The base material placing part 2 is a rectangular frame shape in plan view using a metal material so that the base material 9 and the article W to be packaged are raised and have a strength that does not deform even when pressed against the heater part 8 positioned above. It is configured. The rectangular frame has a predetermined vertical position (for example, a position in the vertical direction 2/3) so as to correspond to two types of base materials having different sizes (the horizontal dimensions are the same and the vertical dimensions are different). ), For example, an auxiliary bar 10 having a surface provided with a heat-resistant member such as silicon rubber is provided. In addition, the upper surface of the base material mounting portion 2 is not limited to the frame shape, and for example, the entire upper surface may be covered with a flat plate.

The base material placing part 2 has a shaft 11 penetrating in the width direction at a substantially central position in the longitudinal direction (film drawing direction) of the base material placing part 2, and both projecting portions of the shaft 11. One end of each of the mounting plates 12 and 12 'is connected to each other, and the other ends of the mounting plates 12 and 12' are fixed to the upper portions of the support frames 13 and 13 'standing and fixed on the base 1 by shafts 14 and 14'. It is supported so as to be pivotable.
Further, toothed pulleys 15 and 15 'are rotatably attached to protruding portions on both sides of the shaft 11 that penetrate the base material placing portion 2, and toothed pulleys 16 and 16' are attached to the shafts 14 and 14 '. The toothed belts 17 and 17 'are wound around the toothed pulley 15 and the toothed pulley 16, and the toothed pulley 15' and the toothed pulley 16 '.

  The moving means 3 for vertically swinging the base material placing part 2 suspended and supported on the support frames 13 and 13 ′ by the shafts 14 and 14 ′ via the mounting plates 12 and 12 ′ is installed on the base 1 The motor 18, the rotating plate 19 driven and rotated by the motor 18, the operating arm 20 connected and fixed to the central shaft 19 ′ of the rotating plate 19, the end of the operating arm 20, and the mounting plates 12, 12. The connecting rod 21 connects the protruding arms 12a and 12'a. And the said structure is provided in the both sides so that the said moving means 3 can rock | fluctuate simultaneously the mounting plates 12 and 12 'attached to the width direction both sides of the base material mounting part 2. FIG.

  With the above configuration, as shown in FIG. 5, when the motor 18 of the moving means 3 is driven and rotated, the operating arm 20 rotates about the central axis 19 ′ via the rotating plate 19, and the connecting rod 21 is swung. The The attachment plates 12 and 12 ′ are rotated about the shafts 14 and 14 ′ by swinging the connecting rod 21. Since the toothed pulleys 16 and 16 ′ are fixed to the shafts 14 and 14 ′ when the mounting plates 12 and 12 ′ are rotated, the toothed pulleys 16 and 16 are rotated together with the rotation of the mounting plates 12 and 12 ′. 'Is also rotated. Since the rotation of the toothed pulleys 16 and 16 'rotates the toothed pulleys 15 and 15' via the toothed belts 17 and 17 ', the rotation of the mounting plates 12 and 12' and the toothed pulleys 15 and 15 ' By rotating 15 ', the base material placing part 2 is raised in the horizontal state at the lower limit position.

The support frames 13 and 13 'are notched and formed with a locking groove 22 for hooking and supporting the shaft 11 that is horizontally mounted over the mounting plates 12 and 12' at the lower limit position of the base material placing portion 2. ing.
The locking groove 22 is formed in an arc shape from the center position in the width direction of the support frames 13 and 13 ′ along the swinging direction of the base material placing portion 2.

  The film roll arrangement part 4 includes support frames 13 and 13 ′ that are erected and fixed on the base 1, and support columns 23 that are erected and fixed at substantially the same interval and height as the attachment intervals of the support frames 13 and 13 ′. , 23 ′, and a film feed means 6 for pulling out the film 5 a from the film roll 5 set in the film roll arrangement section 4 below the film roll arrangement section 4. A suction means 7 for horizontally stretching and holding the film 5a pulled out by the film feed means 6 and a heater section 8 for thermally welding the base material 9 abutted on the film by raising the base material placing section 2 are installed. ing.

  The film roll disposing unit 4 is a rotating roller 27 that is rotatably mounted on two supports 26 and 26 ′ installed at a predetermined interval between a pair of side plates 25 erected and fixed on the cradle 24. And it is comprised so that the film roll 5 may be mounted so that rolling is possible. In addition, the support structure of the film roll 5 in the film roll arrangement | positioning part 4 is not restricted to the support structure by the rotating roller 27 of illustration, The general support structure supported through a shaft in the center hole of the film roll 5 may be sufficient.

Further, a shaft 28 is provided between the side plates 25 so as to be positioned below the film roll arrangement portion 4, and a guide roller 29 for guiding the film 5 a connected to the film roll 5 in the pulling direction is electromagnetically attached to the shaft 28. It is attached via a clutch (not shown). That is, when the film front end clamp unit 36 grips the film and feeds the film, the guide roller 29 and the electromagnetic clutch are separated (OFF), the guide roller rotates, and the film is fed. Further, when the film front end clamp part 36 proceeds to grip the waiting film, the electromagnetic clutch is turned on and the guide roller 29 does not rotate.
Further, as shown in FIG. 4, toothed pulleys 31 and 32 are fixed to the shaft end of a shaft 30 rotatably mounted on the shaft end of the shaft 28 and the opposite end of the cradle 24, respectively. The toothed belt 33 is wound around the toothed pulleys 31 and 32 and a driving pulley attached to the rotating shaft of a film feeding motor (for example, a stepping motor) 37c of the film feeding means 6, and the toothed belt 33 is wound. The shaft 28 is rotated by the rotation of the belt 33. Further, toothed pulleys 31 ′ and 32 ′ are fixed to opposite ends of the shaft 28 and the shaft 30, and a toothed belt 33 ′ is wound thereon. Note that a film tip clamp portion 36 of the film feed means 6 described later is connected to the toothed belts 33 and 33 ′, and the film tip clamp portion 36 is reciprocated by forward and reverse rotation of the toothed belts 33 and 33 ′. It has become.

An intermediate guide roller 66 is rotatably supported by a shaft 67 across the side plate 25 between the guide roller 29 and the film roll arrangement portion 4, and the leading end of the film 5 a is supported on the guide roller by the shaft 67. A guide plate 34 that is wound around the circumferential surface 29 and is in an initial set state in which the guide roller 34 protrudes forward from the lower surface of the guide roller is rotatably attached.
The guide plate 34 is formed in a substantially L-shaped side surface, and the horizontal piece 34a bent at a substantially right angle enters the lower side of the guide roller 29 by the rotation of the guide plate 34, and the tip of the horizontal piece 34a is guided. It is configured to protrude horizontally forward from the roller 29.
On the upper surface of the horizontal piece 34a, a film support plate 35 made of an elastic member protrudes horizontally with the tip side facing forward from the horizontal piece 34a. Thereby, the front end side of the film support plate 35 protruding from the horizontal piece 34a of the guide plate 34 is freely bent in the vertical direction, so that the film front end is securely clamped by the film front end clamp portion 36 of the film feed means 6 described later. . That is, the guide plate 34 sets the leading end of the film connected to the film roll in the initial setting state, and at the same time, supports the leading end of the film from below so that the film leading clamp portion 36 can be stably attached.

The film feed means 6 that sandwiches the leading end of the film 5a supported horizontally on the upper surface of the film support plate 34 and draws the film 5a along the lower surfaces of the suction means 7 and the heater portion 8 sandwiches the leading end of the film 5a. The film front end clamp unit 36 and a drive unit 37 that reciprocates the film front end clamp unit 36 along the suction means 7 and the heater unit 8 are configured.
As shown in FIG. 12, the film tip clamp portion 36 has a movable lower plate 36b pivotally supported by a shaft 36c on the lower side of the fixed upper plate 36a, and a fixed upper plate 36a at a rear position from the shaft 36c. The spring 36d is elastically mounted over the movable lower plate 36b. Thereby, the front end side of the movable lower plate 36b is pressed against the lower surface of the fixed upper plate 36a so that the film 5a can be attached. In addition, an elastic body (for example, urethane foam) may be bonded and fixed to the upper surface of the movable lower plate 36b so that the film can be securely attached by the fixed upper plate 36a and the movable lower plate 36b. In that case, the elastic body may be attached over the entire width in the width direction of the movable lower plate 36b so that the entire width in the width direction of the film 5a can be attached.

Further, a guide roller for forcibly opening the movable lower plate 36b closed by the resilient force of the spring 36d on the side surface of the movable lower plate 36b on the front end side (the side on which the film front end is attached). 38 is attached. A guide inclined plate 39 that guides the guide roller 38 downward with respect to the horizontal line is disposed on the side surface of the side plate 25 where the vicinity of the tip of the film support plate 34 is located.
The inclined guide plate 39 moves forward along the lower surfaces of the suction means 7 and the heater unit 8 so that the film front end clamp portion 36 holds the front end of the film 5a, and is closed at a position before the end of the forward movement. The movable lower plate 36b is forcibly opened against the spring force of the spring 36d. The guide roller 38 attached to the outer surface of the movable lower plate 8b in the closed state is moved forward at a position on the horizontal line on the line passing through the guide roller 38. When the guide roller 38 comes into contact with the guide inclined plate 39 and continues to move forward, the distal end side (the side on which the film is attached) of the movable lower plate 36b opens downward about the shaft 24. Is positioned below the film support plate 34, and after passing through the guide inclined plate 39, is closed by the elastic force of the spring 36d, and the fixed upper plate 36a positioned above the film support plate 34 and the film 5a and the film. To 挾着 the tip portion of Lum support plate 34 (see FIG. 12 (a), (b)).
As shown in FIG. 12C, the inclined guide plate 39 is fixed in the inclined state in the direction in which the guide roller 38 abuts forward, and the guide roller 38 is guided along the lower surface of the guide inclined plate 39. After passing (after attaching the leading edge of the film), when the film leading edge clamp portion 36 is switched back (retracted) and passes the upper surface side of the guide inclined plate 39, the inclined plate 39 obstructs the movement of the guide roller 38. The tension coil spring is mounted so as to be able to fall down so as not to fall, and after the guide roller 38 passes, the fallen guide inclined plate 39 returns to the initial state (inclined state in which the guide roller 38 is guided downward in the traveling direction). It is pulled by the spring 39a.

As shown in FIGS. 3 and 4, the drive unit 37 for reciprocating the film front end clamp unit 36 includes guide shafts 37a and 37′a arranged from the front end to the rear end on the left and right side surfaces of the receiving base 24, and Sliding bodies 37b and 37'b slidably attached to the guide shafts 37a and 37'a, toothed belts 33 and 33 'rotatably disposed outside the receiving base 24, and the toothed belt 33 The sliding bodies 37b and 37'b are connected to the lower side (return path side) of the toothed belts 33 and 33 '. Then, both side portions of the fixed upper plate 36a of the film tip clamp portion 36 are connected and fixed to the lower surfaces of the left and right sliding bodies 37b and 37'b.
Accordingly, the film feed motor 37c (for example, a stepping motor) is driven to rotate, whereby the toothed belts 33 and 33 ′ are rotated, and the sliding bodies 37b and 37 ′ are rotated by the rotation of the toothed belts 33 and 33 ′. b slides along the guide shafts 37a and 37'a, and the film front end clamp portion 36 connected to the slide bodies 37b and 37'b also slides. In the forward movement (advance), the film tip clamp part 36 opens and closes the tip of the film 5a. In the backward movement (retraction), the film tip clamp part 36 moves backward while holding the tip of the film 5a. The amount of film (length) required for packaging can be withdrawn.

In addition, the leading end side of the film drawn out by the operation of the driving unit 37 by the film leading end clamp portion 36 of the film feed means 6 is still held by the film leading end clamp portion 36, but the drawn length is the predetermined length. In order to thermally weld the film 5a to the base material 9 and take out the packaged product, it is necessary to release the sticking by the film tip clamp portion 36. The release mechanism 40 is arranged on the toothed belt 33 ′ side.
As shown in FIG. 13, the release mechanism 40 includes a roller 40a attached to the tip side opposite to the side on which the guide roller 38 is attached in the movable lower plate 36b of the fill tip clamp portion 36, and the roller 40a through the roller 40a. An operating plate 40b that opens the movable lower plate 36b downward, an electromagnetic solenoid 40c that is a power source that moves the operating plate 40b up and down, an initial position sensor 40d that controls ON / OFF of the electromagnetic solenoid 40c, and an end point position sensor 40e. And a flag 40f provided on the sliding body 37′b.
The actuating plate 40b is a strip having a substantially L-shaped cross section, and one end in the longitudinal direction thereof is pivotally supported on the side plate 25 'so as to be vertically rotatable by a shaft 41, and the other end of the actuating plate 40b is a plunger of an electromagnetic solenoid 40c. It is connected to.

  The position for operating the electromagnetic solenoid 40c is determined by the installation positions of the initial position sensor 40d and the end position sensor 40e. The initial position sensor 40d is located near the film support plate 34, and the end position sensor is located near the film drawing end point. 40e is arranged. As a result, after the film feed is finished (when the partition wall 42 ′ is positioned at the second position described later), that is, the film leading end clamp unit 36 moves backward by holding the leading end of the film and removes the longest set film. After the drawing, the flag 40f provided on the sliding body 37′b blocks the end point position sensor 40e, so that the electromagnetic solenoid 40c is operated, and the plunger is drawn to rotate the operating plate 40b downward. The rotation of the operating plate 40b opens the movable lower plate 36b via the roller 40a, and the film sticking is released. When the partition wall 42 'is positioned at a first position described later, the film is not fed to the end point position sensor 40e, and at the first position, the film is fed with a predetermined number of pulses from the initial position sensor 40d. Since the process ends, a sensor for detecting the end is provided in the same manner as the end point position sensor 40e, and the electromagnetic solenoid 40c can be operated by the detection of the sensor to release the film sticking. Alternatively, at the first position, the electromagnetic solenoid 40c may be driven after the film feed motor is driven for a predetermined number of pulses from the initial position sensor 40d. Also, a switch for operating the electromagnetic solenoid 40c is provided in either case of the first position or the second position, and the film sticking by the film leading end clamp portion 36 is released by pressing the switch. Good.

The film 5 a having a predetermined length drawn by the operation of the film feed means 6 is stretched and held in a substantially horizontal shape by the suction means 7.
As shown in FIG. 6, the suction means 7 includes a double box frame 41 formed by an outer box 42 and an inner box 43, and an electric fan 44 that generates a suction force in a space formed by the double box frame 41. It consists of and.
The outer box 42 constituting the double box frame 41 is a box having a rectangular shape in plan view, the upper surface and three of the four side walls are closed, and the lower surface and one side of the side walls are opened. The partition wall 42 ′ is movably disposed in an open portion of the partition wall 42 ′ while maintaining an airtight state.
Further, a fan mounting hole 45 is opened on the upper surface of the outer box 42, and an electric fan 44 is mounted in the fan mounting hole 45, and a negative pressure is generated in the double box frame 41 by the operation of the electric fan 44. Has been. It should be noted that the mounting position of the electric fan 44 on the upper surface of the outer box 42 is present in an area defined when the movable partition wall 42 ′ is positioned at the initial position (first heat welding area). To.

As shown in FIG. 7, the inner box 43 has box frames 43a and 43b in which three of the upper surface and four side walls are closed and one of the lower surface and the side walls is opened. They are fitted face to face and can be extended and contracted. The combined box frames 43a and 43b are fitted in the outer box 42, and one box frame 43a is maintained in a vertical direction while maintaining a certain distance (gap) from the three side walls of the outer box 42. It is supported movably. Further, the other box frame 43b is movable in the vertical direction while maintaining the same gap (gap) as the gap (gap) formed between the outer box 42 and the box frame 43a between the partition wall 42 '. Connected and supported. The support structure will be described later.
The space (gap) defined by the side wall and partition wall 42 ′ of the outer box 42 and the side wall of the inner box 43 (box frames 43a and 43b) is determined by the suction part 7a of the suction means 7 that stretches and holds the film 5a. is there.
Further, the lower end surface of one box frame 43b constituting the inner box 43 is bent upward and outward to form a separating piece (separating means) 55. This separating piece (separating means) 55 lowers the film (heat-bonded to the base material) attached to the heater portion when it is projected downward from the lower end surface of the outer box 42 by a downward biasing force by an elastic member to be described later. It contributes to pressing down and releasing the film from the heater surface.
Since the box frame 43b of the inner box 43 and the partition wall 42 'are coupled with a certain distance (gap), and the heater section 8 is attached to the lower end of the partition wall 42', the partition Even if the wall 42 ′ is moved and the box frame 43 b slides and moves from the state of FIG. 7A to the state of FIG. 7B, the movable heater portion 8, the partition wall 42 ′ and the outer box 42 The suction portion 7a formed by the inner box 43 (box frames 43a and 43b) can move the position of the heater portion according to the size of the base material while maintaining the initial positional relationship.
FIG. 7A shows a case where “Small” is selected from among the base material types in the packaging file to be described later, and “1” is read as the information on the partition wall movement, and the partitioning is performed until the flag 51b blocks the sensor 51a. The wall 42 'has been moved (first position).
FIG. 7B shows the case where “Large” is selected among the base material types in the packaging file, and “2” is read out as the information on the partition wall movement, and the flag 51′b blocks the sensor 51′a. The partition wall 42 ′ has been moved to the second position (second position).

  As shown in FIG. 6, the mechanism for moving the partition wall 42 ′ along the drawing direction of the film 5 a includes a side wall in the outer box 42 along the drawing direction of the film 5 a and a fixed side plate 46 fixed to the open side wall side. Two ball screw mechanisms 47 are constructed over the span. Specifically, the screw shaft 47a is rotatably installed over the side wall of the outer box 42 and the fixed side plate 46, and a nut member 47b screwed to the screw shaft 47a is fixed to the partition wall 42 '. To synchronously rotate the screw shafts 47a of the two ball screw mechanisms 47, the toothed pulleys 48a and 48b are fixed to the end portions of the screw shafts 47a, and the rotation shafts of the drive motors 49 (for example, stepping motors) are fixed. The driving pulley 49a is fixed, and the toothed belt 50 is wound around the driving pulley 49a and the toothed pulleys 48a and 48b. Accordingly, when the driving motor 49 is driven, the two screw shafts 47a are rotated via the toothed belt 50, and the partition wall 42 ′ to which the nut member 47b is fixed is moved in the drawing direction of the film 5a. The adsorbing area (width in the film drawing direction) is adjusted to be wide or narrow.

  As shown in FIGS. 6 and 7, the movement control of the partition wall 42 ′ is configured by attaching a position detecting means 51 across the fixed side plate 46 and the partition wall 42 ′. Specifically, two sets of position detection sensors 51a and 51'a are attached to the fixed side plate 46, and two types of flags 51b and 51'b are attached to the moving partition wall 42 '. Accordingly, when the long flag 51b blocks the position detection sensor 51a, the partition wall 42 'is in the first position, and when the short flag 51'b blocks the position detection sensor 51'a, the partition wall 42' It is detected that it has been moved to the second position.

Further, the inner box 43 of the double box frame 41 constituting the suction means 7 is supported so as to be movable in the vertical direction with respect to the outer box 42. As shown in FIG. The brackets 52 are fixed to the side walls and the partition wall 42 ′, respectively, while the guide rods 53 are fixed upright on the upper surfaces of the box frames 43 a and 43 b constituting the inner box 43, and the guide rods 53 are fixed to the corresponding brackets 52. The guide rod 53 is inserted so as to be movable up and down, and a coil spring (elastic member) 54 is attached to the guide rod 53 so that a downward force acts on the box frames 43a and 43b. In the initial state (the state before the film 5a is sucked and held), the inner box 43 is slightly lower than the lower surface (the surface on which the film is thermally welded) of the heater portion where the lower end of the inner box 43 is attached to the lower end of the outer box 42. When the base material is pressed against the film 5a by raising the base material placing portion 2, the inner box 43 is positioned substantially flush with the lower surface of the heater portion (the heat of the film). When the external force is released by the lowering of the base material placing portion 2 upon completion of the heat seal, the coil spring 54 is pushed down to the initial position.
Further, a through hole 63 communicating with the inside of the outer box 42 is formed on the left and right side walls along the film width direction of the outer box 42 constituting the suction means 7, and covers the through hole 63 in an open state. 64 is attached to the outside of the outer box 42 to form an auxiliary suction part 65. The auxiliary suction portion 65 can reliably suck and hold the film by the function of the auxiliary suction portion 65 even when the film 5 a drawn from the film roll 5 is drawn out of the film in the width direction.

A heater portion 8 is formed outside the suction portion 7a of the suction means 7 so as to surround the suction portion 7a.
The heater portion 8 uses a resistance wire such as a nichrome wire, and is disposed at the lower end of the outer box 42 of the suction means 7 and the lower end of the partition wall 42 ′. In addition, the upper surface side (the side opposite to the surface in contact with the film) of the heater unit 8 is covered with a heat insulating material, and safety measures are taken so as to prevent burns or the like even if fingers are accidentally contacted.
The heater portion 8 is disposed on the lower outer surface of the outer box 42 and the lower outer surface of the partition wall 42 ′ so as to be heat-welded along the four sides of the substantially rectangular base material in plan view. When the heater part 8 corresponding to is divided independently, the corner part where the sides intersect is not thermally welded. In order to eliminate the non-welding of the corner portions, the end portions of the heater portions may be connected by a metal conductor 56 so that the corner portions are also thermally welded.

A cutter 57 for cutting the film 5a drawn by the operation of the film feed means 6 is disposed between the guide roller 29 and the outer box 42 of the suction means 7 having the suction part 7a and the heater part 8. ing.
The cutter 57 cuts the film 5a, which is placed on the package W and thermally welded to the periphery of the base material, at a position in front of the film support plate 35. The cutter 57 is moved up and down by an electromagnetic solenoid 58 and cut. The leading end of the film 5a connected to the film roll 5 is horizontally supported by the film support plate 35, and waits for the film to be drawn out for the next packaging.

The base material 9 used for heat-sealing packaging is a flat paper base material, a resin base material (for example, a film base material, a foamed resin base material, etc.), a thin wooden base material, or a laminate in which different materials are bonded together The surface material (resin laminating, coating treatment, etc.) that enables thermal welding is applied to the material that is difficult to thermally weld the film. This surface treatment should have a slightly lower melting point than the film 5a used for packaging, and the central portion may not be subjected to surface treatment. That is, the surface treatment may not be performed on the portion where the article W is placed. The surface of the base material may be plain (white), but the product may be conspicuous by using a colored or printed pattern according to the product to be placed.
In addition, the base material a may have some unevenness on the upper surface. For example, a convex portion is provided at the position of the upper surface of the base material corresponding to the heater portion 8, and the convex portion and the heater portion 8 are in contact with each other with the film 5a interposed therebetween, so that the sealing property (thermal welding) of the film 5a is enhanced. It may be.

As shown in FIG. 14, the above-described heat seal packaging apparatus has a RAM 59, a ROM 61, a film feed motor 37c, and a film via a bus 59 'to a CPU 59 that controls each block, as shown in FIG. Release solenoid (electromagnetic solenoid) 40c, initial position sensor 40d, end point position sensor 40e, heater unit 8, fan 44, display unit 62, heater position drive motor 49, film cut solenoid (electromagnetic solenoid) 58, mounting table drive motor 18, etc. Is connected.
The RAM 60 has a plurality of storage areas, and stores a packaging file (see FIG. 15) that stores information on the film feed amount and partition wall movement for each base material having a different size used for packaging. The base material type “small” defines information “1” that defines the film feed amount, the partition material movement information “1”, and the base material type “large” defines the film feed amount. Information “2” to be stored, and information “2” defining the movement of the partition wall are stored.
When the type of the base material, “small” or “large” is selected from the display unit, the information for defining the film feed amount and the information for defining the movement of the partition wall are specified and temporarily stored in a predetermined area of the RAM. Is done.
A film feed motor (for example, a stepping motor) 37c moves the film tip clamp portion 36 of the film feed means 6 in the film drawing direction. The film tip clamp portion 36 is moved according to the size of the base material a to be used. The distance moved is variable. The change of the moving distance is, for example, the position of the partition wall (either the first position or the second position) that determines the heat welding region for each base material a of the packaging file is set. The position of the partition wall is determined by the selection of the material a, and the driving of the film feed motor 37c for pulling out the film is controlled accordingly.
With respect to the film feed motor 37c, when the partition wall 42 'is in the first position, the film feed motor 37c is moved by a predetermined number of pulses from the initial position sensor 40d to a position at which the film can be wrapped without any excess film. When the partition wall 42 'is in the second position, the film feed motor 37c rotates to the end point position sensor 40d, which is a position at which the film can be wrapped without causing any excess film.
The film release solenoid 40c is a solenoid that operates a release mechanism 40 that releases the clamping of the film tip clamp portion 36 that pinches and pulls out the leading edge of the film. ON / OFF of the solenoid is detected by the initial position sensor 40d and the end position sensor 40e. Controlled by signal.
The heater position drive motor 49 is a motor that operates a ball screw mechanism that moves the partition wall 42 ′ of the suction means 7. The movement control is performed by the data (first position or first position) set in the product file as described above. 2).

Next, the flow of the packaging operation of the heat seal packaging apparatus described above will be described based on the flowchart of FIG.
S1: The base material 9 on which the article to be packaged W is placed is placed on the upper surface of the base material placing portion 2.
S2: The base material type (“small” or “large”) in the packaging file is selected from the display section, information on the film feed amount of the selected base material, information on the movement of the partition wall (
"1" or "2") is temporarily stored in a predetermined area of the RAM.
S3: Press down the start key (arranged on the operation unit provided on the console of the packaging device).
Of the information temporarily stored in S4... S2, it is determined whether the film cut length drawn by the film feed means 6 which is information relating to the film feed amount is “1”. If the film cut length is “1” (YES), the process proceeds to S5, and the film cut length is “2”.
"(NO), the process branches to S7.
In the embodiment, two types of film cut lengths “1” and “2” are shown. The film cut length “1” is the position of the number of pulses set in advance from the initial position sensor 40d, and the film cut length “2” is the end point. The position of the position sensor 40e is shown.
S5: It is determined whether the sensor 51'a is not blocked by the flag 51'b. If not blocked (YES), it is determined that the partition wall 42 'is located at the first position as shown in FIG. 7A, and the process proceeds to S10. The first position of the partition wall 42 'is set as the default of the apparatus. If it is blocked (NO), it is determined as the state of FIG. 7B, and the process proceeds to S6. Incidentally, the position of the partition wall 42 'is located in either state of FIG. 7 (a) or (b).
If NO in S6... S5, that is, it is determined that the sensor 51′a is blocked by the flag 51′b, it is determined that the state shown in FIG. In this case, from the state of FIG. 7B to the state of FIG. 7A, that is, the sensor 51′a is not blocked by the flag 51′b, and the drive motor 49 (stepping motor) is driven by a predetermined number of pulses. When driven, the cutting wall 42 'moves, and accordingly, the area partitioned by the suction part 7a is reduced, and the heater part 8 on the side corresponding to the drawing direction of the film also moves.
S7: The film cut length is determined to be “2”.
S8: It is determined whether the sensor 51'a is not blocked by the flag 51'b. In the case of YES, that is, it is determined that the sensor 51′a is not blocked by the flag 51′b, and the process proceeds to S9. In the case of NO, it is determined that the sensor 51'a is blocked by the flag 51'b, it is already determined that the state is in FIG. 7B, and the process proceeds to FIG.
S9: The sensor 51a is blocked by the flag 51b, and from the state shown in FIG. 7 (a) to the state shown in FIG. 7 (b), the sensor 51'a is blocked by the flag 51'b. 49 (stepping motor) is driven, the partition wall 42 'is moved, and accordingly, the region formed by the suction portion 7a is expanded, and the heater portion 8 on the side corresponding to the drawing direction of the film is also moved. .
S10... Film feed means 6 according to the film cut length determined in S4 or S5
Activates and pulls out the film.
S11: The peripheral portion of the drawn film 5a is sucked by the suction means 7, and stretched and held substantially horizontally on the lower surface of the suction means 7. For the suction, the electric fan 44 of the suction means 7 is rotated to make the inside of the double box frame 41 have a negative pressure, and the suction force is applied to the suction portion 7 a formed by the outer box 42, the partition wall 42 ′ and the inner box 43. Film 5a drawn out thereby
The four sides of the width direction side edge and the front and rear edge in the pull-out direction are adsorbed.
S12: The electromagnetic solenoid 40c of the release mechanism 40 is actuated to release the film tip clamp part 36 and release the film tip.
S13: The base material placing portion 2 on which the base material a is placed is raised by the operation of the moving means 3.
S14: The raised base material a is pressed against the film 5a stretched and held on the lower surface of the suction means 7 from below for a predetermined time to be heat sealed (thermal welding).
S15: The film 5a is cut and the package is cut off.
S16: The base material placing portion 2 descends and returns to the initial position. Take out the packaged product that has been heat-sealed and placed on the upper surface of the base material placing portion 2.

  In the heat seal packaging device according to the present invention, the film having a predetermined length drawn from the film roll with the above configuration is arranged such that the rear side in the length direction (the side cut by the cutter) is the rear side in relation to the attachment position of the cutter. Although slightly protruding from the heat-welded portion, at least both sides in the width direction of the film and the leading end side of the film can be heat-welded at substantially the same position as the outer peripheral edge of the base material. Thereby, the peripheral edge of the film or the peripheral edge of the base material does not protrude outward from the heat-welded portion, and packaging with good appearance is possible.

The heat seal packaging apparatus of the present invention is not limited to the illustrated embodiment, and can be appropriately changed without changing the gist of the present invention.
(1) In the embodiment, the film drawn out from the film roll is stretched and held by a suction means, and the base material on which the package is placed is pushed up from below and heat sealed (thermal welding) is shown. However, conversely, a base material placing portion may be fixed, and a box frame (including a heater portion) of a suction means that stretches and holds the film may be lowered to perform heat sealing.
(2) In the embodiment, the separation unit is shown integrally with the inner box constituting the suction unit. However, the separation unit is separated from the inner box, and the separation unit is interposed between the outer box and the inner box. You may arrange | position so that a vertical movement is possible.
(3) In the embodiments, the two types of film cut length are described, but the film cut length is not limited to two types, and may be three types or four types. In accordance with this, the partition wall may be moved in a plurality of stages.
(4) In the embodiment, the heater unit is fixed to the lower part of the outer box and the partition wall. However, the present invention is not limited to this. .
(5) In the embodiment, the method of controlling the film cut length “1” by the film feed means at the position of the number of pulses set in advance from the initial position sensor 40d is shown, but the present invention is not limited to this, and the film cut As with the length “2”, a position sensor may be arranged and controlled.
(6) In the embodiment, the example in which both the information on the film feed and the information on the partition wall are specified by selecting the base material type is shown, but each information may be specified.
(7) The selection of the base material type is not limited to the selection from the display unit, but may be selected by a dial switch, for example. In the embodiment, the example in which the film cut length is selected indirectly by selecting the base material type is shown, but the film feed of a predetermined film cut length is performed by selecting the film cut length itself. In addition, the position of the partition wall 42 ′ of the suction unit 7 may be changed, and the region formed by the suction unit 7 a and the position of the heater unit 8 may be changed in width. Further, by selecting the position of the partition wall 42 ', the film cut length may also be changed.
(8) In the flowchart of the embodiment, an example in which the electric fan of the suction means 7 is rotated after the film feeding in S10 and the electric fan is rotated only when the film is sucked is shown. The fan may also rotate. Thereby, since a constant suction force is always generated, the film can be reliably sucked.
(9) In the embodiment, for example, by selecting “Large” or “Small” which is the size of the base material type set in the packaging file, the partition wall 42 ′ moves or the film feed amount However, the present invention is not limited to this. However, the present invention is not limited to this, and a plurality of sensors for detecting the size of the base material 9 placed on the base material placement unit 2 in FIG. It may be provided in the lower part (for example, a plurality of sensors are arranged from the front to the back of the apparatus), and the movement of the partition wall 42 ′ and the amount of film feed may be controlled depending on which sensor is detected.
Furthermore, instead of detecting the size of the base material, the movement of the partition wall 42 ′ and the film feed amount may be controlled by detecting the size of an object to be packaged placed on the base material.
That is, a pair of sensors for detecting the size of an object to be packaged on the base material are provided inside the support frames 13 and 13 'in a plurality of rows in the front-rear direction as viewed from the position where the operator stands for packaging. Depending on whether it is detected, the movement of the partition wall 42 ′ and the film feed amount may be controlled. Usually, a large base material is used for a large package, and a small base material is often used for a small package. Therefore, the size of the base material is determined based on the size of the package. be able to.
As a result, the operator simply puts the base material on the base material mounting portion 2 so that the correct amount of film feed is performed and heat sealing is performed correctly.
Moreover, although the example which arrange | positions the sensor which detects the magnitude | size of a base material and a to-be-packaged object in the base material mounting part 2 or its vicinity was shown, an imaging means, such as a camera, may be sufficient as a detection means.
(10) In the above embodiment, an example of a stepping motor has been shown as a driving motor for moving the partition wall 42 '. However, the present invention is not limited to this, and a DC motor may be used, and the sensors 51a and 51'a are flagged 51b. , 51′b, the motor may be driven a predetermined distance.

A ... Heat seal packaging device W ... Packaged object 2 ... Base material placing part 3 ... Moving means 4 ... Film roll arrangement part 5 ... Film roll 6 ... Film feed means 7 ... Suction means 7a ... Suction part 8 ... Heater part 9 ... Substrate material 36 ... Film tip clamp part 54 ... Coil spring (elastic member) 55 ... Separation means

Claims (9)

A base material mounting part for mounting a substantially flat base material for mounting an object to be packaged;
A film roll arrangement section for feeding out a film to be covered on an object to be packaged on the base material;
A film feed means for pulling out a predetermined length of the film from the film roll disposed in the film roll placement section;
Suction means for sucking and holding the film drawn out by the film feed means above the base material placing portion;
Moving means for relatively moving the suction means or the base material placing portion so as to cover the package on the base material with the film sucked and held by the suction means;
A heater part that thermally welds the edge of the film covering the packaged object to the surface of the base material on which the packaged object is placed, and
The heat seal packaging device, wherein the suction part of the suction means is provided inside the heater part.   The film feed means includes a film tip clamp portion that slides back and forth in the direction of drawing out the film, and the clamp portion is opened by the forward movement of the clamp portion to a position where the film tip waits, thereby pinching the film tip. 2. The heat seal packaging apparatus according to claim 1, wherein the film is pulled out by retraction of the film tip clamp part.   The suction means includes a double box frame formed by an outer box and an inner box, and an electric fan for generating a suction force in a space formed by the double box frame, and the outer box has a rectangular bottom surface in plan view Is an open box, and at least one side of the side wall is a movable side wall whose distance from the opposite side wall can be varied, and the inner box is opened with two box frames open on one side and the bottom of the side wall. The side faces are fitted face to face so that they can be extended and contracted, and one box frame is supported so as to be vertically movable while maintaining a certain distance from the side walls other than the movable side wall of the outer box, and the other box The frame is supported so as to be vertically movable while maintaining a certain distance between the frame and the movable side wall, and further, a heater portion is disposed on the side wall of the outer box and the lower side of the movable side wall. 2. The heat seal packaging apparatus according to 2.   The heat seal packaging apparatus according to any one of claims 1 to 3, further comprising separation means for separating the film thermally welded by pressure bonding of the heater section and the heater section.   5. The heat seal packaging apparatus according to claim 4, wherein the separating means is disposed in the vicinity of the heater portion and is urged by an elastic member so as to protrude from the surface of the heater portion in contact with the film.   4. The heat seal packaging apparatus according to claim 3, wherein the separating means is integrally formed at a lower end of a box frame supported by the movable side wall.   It has a film cut length selection means for selecting a film length to be pulled out by the film feed means, and the area of the suction part of the suction means can be changed according to the selection length of the film cut length selection means The heat seal packaging device according to any one of claims 1 to 6.   The heater unit is configured by a plurality of heater members in a substantially rectangular shape in plan view, and all or a part of the heater member is supported so as to be movable, and the heater unit according to a selection length of the film cut length selection unit The heat seal packaging apparatus according to claim 7, wherein the heat-welding area can be changed.   The heat seal packaging apparatus according to any one of claims 1 to 8, wherein the moving means is a mechanism that presses and contacts the base material placing portion with respect to a film sucked and held by the suction means from below.

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