JP6505029B2 - Gusset forming mechanism, top seal device, packaging machine, gusset forming method, top sealing method, packaging method - Google Patents

Description

  The present invention relates to a gusset forming mechanism for forming a gusset when sealing a packaging film, a top seal apparatus, a packaging machine, a gusset forming method, a top sealing method, and a packaging method.

  In a packaging machine that pillow-packs articles such as food and daily necessities, articles are supplied to the packaging machine one after another, and these articles are individually pillow-wrapped by a packaging film to produce a package.

  The packaging machine includes a bag making machine, a center seal device, a top seal (end seal, lateral seal) device and the like. In the bag-making machine, in accordance with the sequential supply of articles, the packaging film is sequentially drawn out from the raw fabric and continuously supplied, and the packaging film is formed into a tubular shape. In the center seal device, the width direction both end edges (center seal portion) overlapped with each other by making the packaging film cylindrical are sandwiched between a pair of versealers and heated, and pressed by a press roller to form a center seal ( Perform vertical sealing). In the top seal device, the package is manufactured by simultaneously performing top seal (lateral seal) in the width direction of the tubular packaging film at every pitch according to the length of the article, and cutting. The top seal device may be called an end seal device or a lateral seal device.

  In the case of producing a package with a gusset (mutch), in a top seal device, a pressing piece (gusset claw) is inserted into a tubular film to form a gusset. That is, if a top seal is performed with the push-in piece inserted, a package body with a gusset is completed in a state where the gusset is folded in the top seal portion.

Patent No. 5825638 gazette

  However, when sealing and cutting a predetermined position of the cylindrical packaging film (a film portion where there are no articles before and after) with the top seal device in the lateral direction, the packaging film pressed by the pair of sealers The articles that are in contact with each other move backward along the transport direction. Retraction of the article is noticeable when the article is light.

  In addition, air existing in the space of the film portion to be sandwiched when sealing and cutting with the top seal device moves back and forth in the cylindrical packaging film, and the articles positioned before and after the top seal device (sealer) are respectively It may be biased in the longitudinal direction of the transport direction. The thus urged articles move relatively in the longitudinal direction in the cylindrical packaging film.

  In particular, when an air bag is generated in which the article on the upstream side of the top seal device (sealer) relatively recedes (displacement to the upstream side) in the cylindrical packaging film, the article remains misaligned at the time of top sealing. If it advances to the downstream side of a top seal device (sealer), it will be a problem that an article will be caught by a sealer.

  Such an air bag is likely to occur when the articles are light in weight, and in particular, when a plurality of articles are accommodated in parallel in the width direction of the transport path, for example, in the standing posture, the individual articles are Since the air bag backs up and the degree of displacement (displacement) is also likely to vary, the possibility of the occurrence of biting of the article at the time of top sealing becomes high.

  The present invention has been made in view of the above-mentioned problems, and even when the article is air-backed, a gusset forming mechanism capable of returning the article to an appropriate position at the time of top sealing and suppressing biting of the article, the top An object of the present invention is to provide a sealing device, a packaging machine, a gusset forming method, a top sealing method and a packaging method.

(1) The present invention relates to a pair of sealers extending in a second direction orthogonal to the first direction with respect to a cylindrical packaging film which contains an article and is continuous in the first direction, the first direction and the first A gusset forming mechanism for folding the packaging film and forming a gusset when sealing the packaging film by approaching and abutting in a third direction orthogonal to the two directions, the downstream side of the pair of sealers A pair of push-in portions for pushing the packaging film inward from both sides in the second direction, a moving mechanism for moving the pair of push-in portions in the second direction, and the pair of push-in portions , e Bei an article moving portion for moving the article in a downstream direction along with the movement of the pair of pushing portion, the pushing unit is configured along a first direction, the third direction distance And the article moving portion is provided between the opposing plate members, and the article moving portion is provided with the V-shaped plate member, and the article moving portion is provided from the upstream side to the downstream side in the first direction. A gusset forming mechanism characterized in that it is an inclined surface including an inclined portion inclined so as to be displaced outward in two directions .

  According to such a configuration, it is possible to prevent an article in contact with the packaging film narrowed by the pair of sealers at the time of top sealing from being retracted along the transport direction. In addition, even when the article is air-backed, the article can be returned to an appropriate position at the time of top sealing, and biting of the article can be suppressed.

According to such a configuration, it is possible to move the article downstream by the article moving unit only by moving the article moving unit in the second direction (the width direction of the packaging film).
In addition, when the packaging film is folded in by the push-in portion to form the gusset, the article moving portion can move the article to the downstream side in synchronization with this, so that the top seal is easy to move (retract) It is possible to effectively prevent the backward movement of the article.

( 2 ) The present invention is also the gusset forming mechanism according to ( 1 ), wherein the inclined portion is provided at least at a position near the center in the third direction of the packaging film.

(3) The present invention is also the upstream side of the pair of sealers, the packaging film having other pair of pushing portions pressed into the inside of the second direction, and wherein the (1) or (2 a gusset forming mechanism according to).

( 4 ) The present invention also seals the packaging film by bringing the gusset forming mechanism according to any one of the above (1) to ( 3 ) and the sealing surfaces of the pair of sealers into close proximity in the third direction. It is a top seal device characterized by having a seal mechanism.

  According to such a configuration, it is possible to prevent the article in contact with the packaging film narrowed by the pair of sealers at the time of top sealing from being retracted along the transport direction, and in the case where the article is air-backed Also, at the time of top sealing, the article can be returned to an appropriate position, and a top sealing device capable of suppressing biting of the article can be provided.

( 5 ) The present invention also relates to a supply apparatus for supplying the packaging film, a bag manufacturing apparatus for bending the packaging film supplied from the supply apparatus in the width direction to form a cylindrical shape, and the bag manufacturing apparatus The center seal device which applies a center seal to the packaging film formed in a tubular shape downstream, and the top described in ( 4 ) which seals the package film center-sealed in the width direction at a predetermined interval. And a sealing device.

  According to such a configuration, it is prevented that the article in contact with the packaging film narrowed by the pair of sealers at the time of top sealing is retracted along the transport direction, and even when the article is air-backed, At the time of top sealing, the article can be returned to an appropriate position, and a packaging machine capable of suppressing biting of the article can be provided.

( 6 ) The present invention also relates to a pair of sealers extending in a second direction orthogonal to the first direction with respect to a cylindrical packaging film which contains an article and is continuous in the first direction; The packing film is folded to form the gusset when the packing film is sealed by causing the pair of push-in portions to advance and retract along the second direction while making the third approach and abutment in the third direction orthogonal to the second direction In the gusset forming method, the push-in portion has a V-shaped plate member which is released so that the distance in the third direction gradually separates along the first direction, and the movement of the push-in portion At the same time, when the packaging film is folded, it is provided so as to be opposed between the plate members, and is inclined so as to be displaced outward in the second direction from the upstream side to the downstream side in the first direction. Moving the article moving means, which is an inclined surface including the inclined portion, inward from the outer side in the second direction to the downstream side across the article located downstream of the sealer via the packaging film let a gusset forming method characterized by.

  According to such a configuration, it is possible to prevent an article in contact with the packaging film narrowed by the pair of sealers at the time of top sealing from being retracted along the transport direction. In addition, even when the article is air-backed, the article can be returned to an appropriate position at the time of top sealing, and biting of the article can be suppressed.

  According to such a configuration, it is possible to move the article downstream by the article moving means only by moving the article moving portion in the second direction (the width direction of the packaging film).

( 7 ) The present invention is also the gusset forming method according to the above ( 6 ), which is supplied in parallel along the second direction in an upright state and is included in the packaging film.

  According to such a configuration, the plurality of articles can be collectively moved downstream by one operation of advancing and retracting the article moving unit in the second direction (the width direction of the packaging film).

( 8 ) The present invention also forms a gusset by the gusset molding method according to ( 6) or (7 ) above, and makes the sealing surfaces of the pair of sealers approach the third direction to make the packaging film It is a top seal method characterized by sealing.

  According to such a configuration, it is possible to prevent the article in contact with the packaging film narrowed by the pair of sealers at the time of top sealing from being retracted along the transport direction, and in the case where the article is air-backed Also, at the time of top sealing, the article can be returned to an appropriate position, and a top sealing method capable of suppressing biting of the article can be provided.

( 9 ) The present invention also provides a step of supplying the packaging film, a bag-making step of bending the supplied packaging film in the width direction and forming it into a tubular shape, and the packaging film formed into a tubular shape Providing a center sealing step of center sealing, and a top sealing step of sealing the packaging film center-sealed in the width direction at predetermined intervals by the top sealing method described in ( 8 ). It is a packaging method to be characterized.

  According to such a configuration, it is possible to prevent the article in contact with the packaging film narrowed by the pair of sealers at the time of top sealing from moving backward along the transport direction, and even when the article is air-backed, At the time of top sealing, the article can be returned to an appropriate position, and a packaging method capable of suppressing biting of the article can be provided.

  According to the present invention, even when the article is air-backed, the article can be returned to an appropriate position at the time of top sealing, and biting of the article can be suppressed.

It is a schematic diagram of a packing machine concerning an embodiment of the present invention. It is the external appearance perspective view which looked the package body from the downward direction. Regarding the top seal device employed in the packaging machine, (A) is a front view of the first sealer and the second sealer in the separated state, (B) is a front view of the first sealer and the second sealer in the approach state, (C) is a side sectional view in which the first sealer and the second sealer are in the separated state, and (D) is a side sectional view in which the first sealer and the second sealer are in the approaching state. The (A) which shows the gusset formation mechanism employ | adopted as the top seal apparatus, a front view with a 1st sealer and a 2nd sealer in a separation state, (B) It is a front view with a 1st sealer and a 2nd sealer approach. It is a perspective view which shows the gusset nail | claw of the same gusset formation mechanism. (A) Top view, (B) Side view seen from the conveyance width direction, (C) It is the front view seen from the downstream side of the conveyance direction for demonstrating the same gusset nail. It is an upper side figure which shows the process in which a gusset is formed into a packaging film by the same gusset nail | claw. It is a side view showing a process of forming a gusset on a packaging film by the same gusset nail. The (A) top view which shows the modification of the same gusset nail, (B) Top view, (C) It is the side view seen from the conveyance width direction.

  Hereinafter, the configuration of the packaging machine 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a packaging machine 1. Moreover, FIG. 2 is the external appearance perspective view which looked at package body ZA1 packaged by the packaging machine 1 from the downward direction. In the drawings and the subsequent drawings, a part of the configuration is appropriately omitted to simplify the drawings. And in this figure and each subsequent figure, the size, shape, thickness, etc. of a member are exaggerated and expressed suitably.

  The packaging machine 1 shown in FIG. 1 is used in a line for sequentially packaging articles XA1 such as food and household products with a packaging film YA1. The packaging machine 1 includes an article supply device 2, a film supply device 3, a packaging machine main body 4, a control unit (not shown), and the like. In addition, as a definition of various directions in the packaging machine main body 4, the first direction which is the longitudinal direction of the packaging film YA1 (the direction in which the center seal extends) is the transport direction L, and the width direction of the packaging film YA1 extending in a band (top seal The second direction, which is the extending direction), is the transport width direction W, and the third direction, which is the height direction of the packaging film YA (the direction perpendicular to the transport direction L and the transport width direction W), is the transport thickness direction H I assume.

  The components of the packaging machine 1 are generally controlled by a control unit. The control unit comprises a CPU, a RAM, a ROM and the like, and executes various controls. The CPU is a so-called central processing unit, and various programs are executed to realize various functions. The RAM is used as a work area of the CPU. The ROM stores a basic OS and programs executed by the CPU.

  The article supply device 2 transports the article XA1 at equal intervals and sequentially transports the article XA1 to the downstream packaging machine main body 4. The article supply device 2 is configured of, for example, a finger conveyor. Specifically, the article supply device 2 includes a transport surface (not shown) having a slit, a side guide (not shown) for guiding the article XA1 on the transport surface from the side, a driving sprocket 5, and Sprockets (not shown), an annular chain 6 running across the sprockets, a plurality of fingers 7 attached to the chain 6 at equal intervals, and a servomotor (shown in the figure) Omitted) etc.

  The driving sprocket is rotated by the drive of a servomotor. The driven sprocket 5 rotates in conjunction with the driving sprocket as the chain 6 travels. The chain 6 travels to circulate by the rotation of a driving sprocket. The plurality of fingers 7 project upward from below the transport surface via the slits. The plurality of fingers 7 travel on the transport surface as the chain 6 travels. Thereby, the plurality of fingers 7 push the article XA1 on the conveyance surface and send it out to the packaging machine main body 4.

  The film supply device 3 continuously supplies the packaging film YA1 to the downstream packaging machine main body 4. The film supply device 3 includes an original fabric shaft 8, a servomotor (not shown), guide rollers 9a and 9b, and the like. The raw fabric shaft 8 rotatably holds the raw fabric roll YB1. The original fabric shaft 8 is powered by the servomotor to rotate, and rotates the held original fabric roll YB1. Thereby, packaging film YA1 is drawn out (stretched) from original fabric roll YB1. The guide rollers 9a and 9b appropriately convert the transport direction of the raw fabric roll YB1 and guide it to the packaging machine main body 4 side.

  In addition, instead of adopting the method of driving the package film YA1 as described above as a method of delivering the packaging film YA1 from the film roll YB1, a feed roller is separately provided, and the feed roller is moved to draw the package film YA1. A driving method may be adopted.

  The packaging machine main body 4 packages the article XA1 supplied from the article supply device 2 with the packaging film YA1 supplied from the film supply device 3. Specifically, the packaging machine main body 4 includes the bag making device 14, the pinch roller 15, the center seal device 16, the first conveying device 17, the upper pressing device 18, the top seal device 100, and the second The transport device 20 is provided.

  The bag making apparatus 14 bags the packaging film YA1 supplied from the film supply device 3 in a tubular shape so that both end edges in the width direction overlap each other. Further, the bag making apparatus 14 supplies the article XA1 supplied from the article supply device 2 to the packaging film YA1 which is formed into a bag in a tubular shape. Thereby, the article XA1 is wrapped in the packaging film YA1 formed into a tubular shape. That is, the bag-making machine 14 functions as a bag-making apparatus that bends the packaging film YA1 in the width direction to form a tubular shape.

  As an example, the article XA1 is an article group in which food (for example, sprinkled) or the like stored in a thin sachet, which is subdivided by one (one serving), is arranged in parallel in the transport width direction W in an upright state. .

  The pinch roller 15 sandwiches both end edges of the packaging film YA1 overlapping each other (hereinafter referred to as a center seal portion CE1 (see FIG. 2)) to apply a conveying force to the center seal portion CE1.

  The center seal device 16 includes a pair of versealers 16 a and a press roller 16 b. The center seal device 16 heats by sandwiching the center seal portion with a pair of versealers 16a. Then, the center seal device 16 crimps the heated center seal portion with the press roller 16 b to center seal. That is, the center seal device 16 applies a center seal to the cylindrically formed packaging film YA1 downstream of the bag making device 14.

  The first transport device 17 transports the center-sealed cylindrical packaging film YA1 along with the article XA1 wrapped in the packaging film YA1 on the transport surface (reference numeral omitted) toward the top seal device 100. . The first transfer device 17 stretches the transfer surface in the transfer direction L in accordance with the box motion of the top seal device 100.

  The upper pressing device 18 is disposed above the first transfer device 17 and suppresses the article XA1 transferred to the first transfer device 17 from above along with the packaging film YA1. Thereby, the article XA1 is transported while maintaining the horizontal state.

  The top seal device 100 performs a top seal (end seal, lateral seal) and a cut in the width direction of the packaging film YA1 at every pitch according to the length of the article XA1. Thereby, a package ZA1 as shown in FIG. 2 is manufactured. That is, the top seal device 100 seals and cuts the center-sealed packaging film YA1 in the width direction at predetermined intervals. In the package ZA1, a top seal portion TO1 extending in a band shape in the width direction is formed. A film equivalent to the transport thickness direction H of the packaging film YA1 is folded inward at both ends in the width direction of the top seal portion TO1 to form a gusseted portion GA1 that is a triangular pyramid-shaped recess.

  3 and 4 are diagrams for explaining the top seal device 100 employed in the packaging machine 1 described above, and FIG. 3 (A) shows the downstream side of the transport direction L in which the first sealer and the second sealer are separated. (B) is a front view of the first sealer and the second sealer in the approaching state, and FIG. (C) is a side view of the first sealer and the second sealer in the separated state. It is a sectional view, and the figure (D) is a side sectional view of the approach state of the 1st sealer and the 2nd sealer. FIG. 4 is a view showing a gusset forming mechanism employed in the top seal device 100, and FIG. 4 (A) is a front view of the first sealer and the second sealer viewed from the downstream side in the conveying direction L of the separated state. It is a front view of the approach state where the first sealer and the second sealer are in the same state (B).

  As shown in FIGS. 3A and 3C, the top seal device 100 moves the first seal unit 110 disposed on the upper side and the second seal unit 150 disposed on the lower side relative to each other. A device 180 is provided. The first seal unit 110 and the second seal unit 150 are disposed opposite to each other on the both sides of the packaging film YA1, and approach and separate from each other by the moving device 180. The first seal unit 110 is provided with a cutter unit 130.

  This approaching / separating operation can be moved by, for example, a movement trajectory of box motion. Specifically, while the first seal unit 110 and the second seal unit 150 approach each other to sandwich the packaging film YA1, and while moving from upstream to downstream by a predetermined distance so as to follow the transport direction of the packaging film YA1. Apply seal and cut. Thereafter, the first seal unit 110 and the second seal unit 150 move away from the packaging film YA1, and further move from downstream to upstream by a predetermined distance to return to the original position. By repeating these operations, the packaging film YA1 is repeatedly sealed and cut.

  The first seal unit 110 is fixed to the first base 112, a first fixing base 114 disposed on the side of the packaging film YA1 with respect to the first base 112 to hold the sealer, and the first fixing base 114. The first sealer 120 is provided. The first fixing base 114 is disposed on the first base 112 via the slidable slide shaft 114A, and the surface perpendicular direction of the packaging film YA1 to the first base 112, that is, the second seal unit It can be reciprocated in the approaching / removing direction with respect to 150. The first fixing base 114 is always biased toward the packaging film YA1 with respect to the first base 112 by a biasing member 114B such as a compression spring, for example. In the first sealer 120, a heater (not shown) is incorporated to heat the first sealer 120.

  The cutter unit 130 installed in the first seal unit 110 includes a cutter 132 housed in the first fixed base 114 and the first sealer 120 so as to be vertically movable, and a cutter driving device 134 for driving the cutter 132. When the cutter 132 is lowered by the cutter driving device 134, as shown in FIGS. 3B and 3D, the cutter 132 protrudes from the seal surface of the first sealer 120, and the cutting edge thereof is the same as that of the second sealer 160. Enter the groove. As a result, the packaging film YA1 is cut.

  The second seal unit 150 is fixed to the second base 152, a second fixing base 154 disposed on the side of the packaging film YA1 with respect to the second base 152 to hold the sealer, and the second fixing base 154. Second sealer 160. The second fixing base 154 is fixed to the second base 152. In the second sealer 160, a heater (not shown) is incorporated to heat the second sealer 160.

  As shown in FIGS. 3B and 3D, when the first seal unit 110 and the second seal unit 120 approach each other, the first sealer 120 and the second sealer 160 abut on the packaging film YA1. When the first seal unit 110 and the second seal unit 120 further approach, the first sealer 120 of the first seal unit 110 is pushed toward the first base 112 against the biasing force of the biasing member 114B, An appropriate clamping force is generated between the first sealer 120 and the second sealer 160. The heat of the first sealer 120 and the second sealer 160 seals the packaging film YA1. Almost simultaneously with the completion of the sealing, the cutter unit 130 lowers the cutter 132 to cut the packaging film YA1.

  Top seal device 100 further includes gusset forming mechanism 200. The gusset forming mechanism 200 has a pair of gusset units 210 disposed on both sides in the transport width direction W of the packaging film YA1, and this gusset unit 210 makes a pair of the packaging film YA1 in the transport width direction W A Gazette GA1 (see FIG. 2) is formed on the package ZA1 by folding the side inward.

  As shown in FIG. 4, the pair of gusset units 210 are disposed on one side and the other side in the transport width direction W, and respectively have a gusset claw 300 and a moving mechanism (advancing / retraction mechanism) 230 for moving the gusset claw 300 forward and backward. . The pair of gusset units 210 have the same configuration, and are disposed symmetrically (oppositely) with respect to the center line in the transport direction L.

  The moving mechanism 230 includes a guide rail 232 extending in the transport width direction W, a slider 234 movably disposed along the guide rail 232, a slide plate 236 fixed in the vertical direction to the slider 234, and a motor 238. And a rocking shaft 239. The rocking shaft 239 has one end fixed to the motor 238 and a pin arranged at the other end. This pin is inserted into the vertically elongated hole 236A of the slide plate 236. Thereby, the moving mechanism 230 is configured with an orthogonal slide mechanism that converts rotational motion into reciprocating motion, and when the swing shaft 239 is rotated by the motor 238, the pin moves in the long hole 236A, and the slide plate 236 The slider 234 reciprocates in the transport width direction W. In addition, although the structure which rock | fluctuates the rocking shaft 239 was illustrated as a moving mechanism 230 here, an air cylinder and a cam mechanism are also employable, for example.

  The gusset claw 300 of the gusset forming mechanism 200 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view of a gusset claw 300 disposed on the right side of FIG. 4 as an example. 6 (A) is a top view of the gusset claw 300 of FIG. 5, FIG. 6 (B) is a side view as viewed from the transport width direction W, and FIG. 6 (C) is viewed from the downstream side of the transport direction L. It is a front view of gusset nail 300. As shown in FIG.

  As shown in FIG. 5, the gusset claw 300 is an upstream gusset claw 300A that pushes the packaging film YA1 inward in the transport width direction W on the upstream side of the pair of sealers (first sealer 120 and second sealer 160); On the downstream side of the pair of sealers, the downstream side gusset claw 300B is configured to push the packaging film YA1 inward in the transport width direction W.

  Here, instead of the illustration of the pair of sealers (the first sealer 120 and the second sealer 160), an abutment position T defined as a space on the space with which the strip seal surfaces of the pair of sealers abut It is illustrated.

  On one side in the transport width direction W, the upstream side gusset claw 300A and the downstream side gusset claw 300B are integrally connected by the support member 300C, and simultaneously move forward and backward in the same direction. Similarly, on the other side in the transport width direction W, the upstream side gusset claw 300A and the downstream side gusset claw 300B are integrally connected by the support member, and simultaneously move forward and backward in the same direction.

  As shown in FIGS. 6A and 6B, the entire upstream gusset claw 300A is a pushing portion 302A that pushes the packaging film YA1 inward in the transport width direction W. On the other hand, as shown in FIGS. 6B and 6C, the downstream side gusset claw 300B is configured to include a pushing portion 302B that pushes the packaging film YA1 inward in the transport width direction W, and an article moving portion 303. .

  More specifically, as shown in FIG. 6B, the upstream side gusset claw 300A (pushing portion 302A) extends from the downstream side (lower side in the drawing) to the upstream side (upper side in the drawing) along the conveyance direction L. As shown in FIG. 5, the V-shaped plate member is inclined such that the distance in the conveyance thickness direction H gradually becomes larger. The position of the V-shaped valley portion (tip) is the position at the center in the transport thickness direction H of the packaging film YA, and the contact position T (the first sealer 120, the second sealer 160) of the pair The position in the horizontal plane of the band) is a position defined as the place on the space where the sealing surface abuts. That is, the push-in portion 302A has a V shape opened in a direction away from the contact position T on the upstream side in the transport direction L (see FIG. 5).

  In the push-in portion 302A, the tip of the V-shaped valley portion abuts the side surface of the packaging film YA1 first to push the packaging film YA1 inward. Further, as the amount of pressing increases, (at least a part of) the V-shaped sloped portion also abuts on the packaging film YA1, and the packaging film YA1 can be pushed inward without slack.

  6B, the push-in portion 302B of the downstream-side gusset claw 300B has the same configuration as the upstream-side gusset claw 300A (push-in portion 302A), and the V-shaped valley portion is in the conveyance width direction W Are arranged symmetrically with the pushing portion 302A so as to face each other. That is, as the push-in portion 302B of the downstream side gusset claw 300B moves from the upstream side (the upper side in the drawing) to the downstream side (the lower side in the drawing) along the conveying direction L, the distance in the conveying thickness direction H gradually becomes It comprises a V-shaped plate member which inclines away. The position of the V-shaped valley portion (tip) is the position in the horizontal plane of the contact position T. That is, the push-in portion 302B has a V shape which is opened in the direction away from the contact position T on the downstream side in the transport direction L (see FIG. 5).

  In the push-in portion 302B, the tip of the V-shaped valley portion abuts the side surface of the packaging film YA1 first and pushes the packaging film YA1 inward. Further, as the amount of pressing increases, (at least a part of) the V-shaped sloped portion also abuts on the packaging film YA1, and the packaging film YA1 can be pushed inward without slack.

  As shown to FIG. 6 (B) and (C), the articles | goods movement part 303 is each provided corresponding to a pair of downstream side gusset nail | claw 300B (pushing part 302B) arrange | positioned at conveyance width direction W both sides. In this example, the article moving unit 303 is integrally formed on each of the pair of left and right pushing portions 302B, and moves the article XA1 in the downstream direction along with the advancing and retracting movement of the pair of left and right pushing portions 302B.

  The article moving unit 303 is inclined to displace (spread) from the inner side to the outer side in the conveyance width direction W as it goes from the upstream side to the downstream side in the conveyance direction L, and the center in the conveyance thickness direction H of the packaging film YA1 It has at least an inclined portion 305A provided at a position to be near. Specifically, the position in the vicinity of the center in the transport thickness direction H of the packaging film YA1 is a position located in the horizontal plane of the contact position T described above. The article moving unit 303 of the present embodiment is an inclined surface 305 provided between the plate members facing in a V-shape including the inclined portion 305A.

  The inclined surface 305 is a surface perpendicular to the conveyance surface formed by the conveyance direction L and the conveyance width direction W, and the outer side from the inside of the conveyance width direction W from the upstream side to the downstream side of the conveyance direction L It is a surface that inclines to move (spread). That is, the tip P1 of the valley portion of the V hour shape, the center position P2 of the upstream end of the inclined surface 305 (the position in the horizontal plane of the contact position T), and the center position P3 of the downstream end of the inclined surface 305 (contact position T Position P1, P2 and P3 are arranged in this order from the upstream side to the downstream side in the transport direction L, and the position P1 from the inside to the outside in the transport width direction W P2 and P3 are arranged in this order (FIG. 5, FIG. 6 (A)-(C)).

  The inclined surface 305 has a trapezoidal shape (or a triangular shape) in a side view (FIG. 6C) viewed from the transport width direction W, and its oblique side (upper and lower oblique sides in FIG. 6) It is provided integrally with the push-in portion 302B so as to be in contact with the V-shaped end (nearby).

  As a result, when the downstream side gusset claw 300B moves forward and backward along the transport width direction W by the moving mechanism 230, the push-in portion 302B and the article mover 303 simultaneously move back and forth along the transport width direction W.

  The operation of the article moving unit 303 will be described with reference to FIGS. 7 and 8. FIG. 7A is a top view of a state in which the first sealer 120 and the second sealer 160 are separated in the transport thickness direction H, and FIG. 7B shows the first sealer 120 and the second sealer 160. It is a top view at the time of approaching in the conveyance thickness direction H, and sealing. In addition, in the same figure, it replaces with the 1st sealer 120 and the 2nd sealer 160, and shows the contact position T, the left of illustration is an upstream side, and the right of illustration is a downstream. 8A is a side view of FIG. 7A viewed from the transport width direction W, and FIG. 8B is a side view of FIG. 7B viewed from the transport width direction W. The left in the figure is the upstream side, and the left in the figure is the downstream side.

  First, as shown in FIGS. 7A and 8A, as the top seal of the downstream article XA1 ′, a predetermined position of the cylindrical packaging film (the front and rear articles exist in the top seal device 100). When sealing and cutting the unintended film portion) in the lateral direction, the upstream article XA1 is placed at an appropriate position.

  In this state, as shown in FIGS. 7B and 8B, the first sealer 120 and the second sealer 160 approach the packaging film YA1 along the transport thickness direction H, and the packaging film YA1 is obtained. In the vicinity of the timing of contact, the gusset forming mechanism 200 causes the gusset claws 300 (the upstream gusset claw 300A, the downstream gusset claw 300B) to advance inward from both sides in the transport width direction W, and the packaging film Transform YA1 inwards. Thereafter, the first sealer 120 and the second sealer 160 further approach to hold the packaging film YA1 at the contact position T, and heat seal and cut the hatched area.

  At this time, air existing in the space of the film portion to be inserted moves back and forth in the cylindrical packaging film YA1, and in particular, an air bag is generated on the article XA1 on the upstream side of the first sealer 120 (second sealer 160). As shown to the same figure, it may reverse | retract (position shift to an upstream side) relatively within a cylindrical packaging film.

  Then, in the state where an air bag is generated on the article XA1 on the upstream side of the first sealer 120 (second sealer 160), in order to apply the top seal of the article XA1, again, FIGS. 7A and 8A. As shown in FIG. 1, the first sealer 120 and the second sealer 160 are separated in the transport thickness direction H, and transport the packaging film YA1 including the article XA1 to the downstream side. In the previous top sealing step, the article XA1 on which the air bag is generated on the upstream side is moved to the downstream side of the first sealer 120 as it is to be an article XA1 ', and the top seal and the cut are applied.

  As shown in FIGS. 7B and 8B, the upstream gusset is formed by the downstream gusset claw 300B when the downstream side article XA1 'is top-sealed. At this time, the article moving unit 303 moves to the inside in the conveyance width direction W together with the downstream side pressing unit 302B, and holds the article XA1 'from both sides in the conveyance width direction W and presses it. The article moving unit 303 is an inclined surface 305 that spreads from the inside to the outside in the conveyance width direction W from the upstream side to the downstream side in the conveyance direction L, so that the article moving unit 303 moves in the conveyance width direction W As indicated by the arrows in FIGS. 7B and 8B, the article XA1 'is urged toward the inside in the conveyance width direction W and also to the downstream side in the conveyance direction L. As a result, the article XA1 ', that is, a plurality of article groups constituting the article XA1' are collectively moved downstream.

That is, as indicated by the broken line, the downstream product XA1 'folds the packaging film YA1 by the push-in portion 302B of the downstream gusset claw 300B even if the air bag causes positional deviation on the upstream side of the first sealer 120. At the same time, by simultaneously moving the article moving unit 303 inward, the article moving unit 303 can be moved to the downstream side across the article XA1 ′ via the packaging film YA1. In addition, even if the article XA1 'is an article group arranged in parallel in the transport width direction W in the standing posture, the article group is collectively moved downstream and the positions of the upstream ends of the article group are collectively aligned. it can.
<Modification>

  A modification of the gusset nail 300 will be described with reference to FIG. The same figure (A) and (B) are top views which show a modification, and the same figure (C) is the side view seen from the conveyance width direction of the same figure (A) and (B).

  The article moving unit 303 of the downstream side gusset claw 300B is not limited to the above configuration as long as it is configured to sandwich the article XA1 from both sides and move downstream when moving toward the inside in the transport width direction W. That is, it has at least an inclined portion 305A (see FIG. 6) which is inclined so as to spread from the inner side to the outer side in the transport width direction W from the upstream side to the downstream side in the transport direction L. It may be provided at a position near the center in the transport thickness direction H of the packaging film YA1.

  Therefore, for example, as shown to the same figure, any of pushing part 302B and article moving part 303 may be flat form parallel to a conveyance side.

  In FIG. 6A, the push-in portion 302 has a flat stick shape, and is provided with an article moving portion 303 having a triangular shape in top view with the inclined portion 305A as an oblique side on the side near the tip.

  Further, in the same figure (B), an inclined portion 305A which protrudes from the side near the tip of the flat stick shaped push-in portion is provided.

  In any case, when the article moving unit 303 moves inward in the transport width direction W with the movement of the push-in unit 302B, the article moving unit 303 moves the article on the downstream side of the sealer in the downstream direction, Can be aligned.

  Further, in the above embodiment, the article moving part 303 has been described as a part of the downstream side gusset claw 300B that is integrally formed with the push-in part 302B of the downstream side gusset claw 300B. However, the present invention is not limited to this, and the article moving unit 303 may be configured separately from the pushing unit 302B, and configured to move forward and backward (in synchronization with this) along with the advancing and retreating movement of the pushing unit 302B. . In this case, the moving mechanism 230 of the pushing portion 302B may move together with the pushing portion 302B, or the moving mechanism other than the moving mechanism 230 may move forward and backward with the pushing portion 302B. .

  Also, the article may be one or may not be a package (a sachet).

  Moreover, the article supply device 2 can apply various conveyance devices, such as a belt conveyor, a plate conveyor, and a roller conveyor, for example.

  In addition, the second seal unit 150 may directly attach the second sealer 160 to the second base 152 without providing the second fixing base 154.

  In addition, even when the article does not move backward (air bag) at the time of top seal, the packaging film YA1 is pushed in by the downstream side gusset claw 300B and the article on the downstream side of the pair of sealers 120 and 160 of the top seal device 100 As it moves downstream, the cut pitch can be shortened and packaged tightly.

  In addition, the article supply device 2 retracts from the normal supply position to supply the articles, so that the article XA1 located immediately upstream of the pair of sealers 120 and 160 of the top seal device 100 is paired with the article XA1 at the top sealing. An article XA1 immediately downstream of the pair of sealers 120, 160 of the top seal device 100 can be secured with a wider space than usual between the sealers 120, 160 and the packaging film YA1 with the gusset nail 300B. Since the article XA1 is moved downstream while being folded, biting at the time of top sealing can be suppressed.

  In addition, the packaging machine 1 may be a packaging machine that forms a fold (broken line) in the transport direction, or a corner seal packaging machine (hem seal packaging machine). In these cases, the opening (cross-sectional area) of the tubular film in a tubular shape is determined, and the article XA1 is easily packaged in the vertical plane of the tubular film, so it is easy to air-back at the top seal. However, according to the present embodiment, the biting of the article XA1 can be prevented even when the air bag is used.

  Further, in the present embodiment, the configuration in which the article moving portion is not provided on the upstream side gusset claw 300A has been described as an example, but the article moving portion is provided on the upstream side gusset claw 300A in addition to the downstream side gusset claw 300B. May be

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and the technical idea of the present invention. That is, in the above embodiment, the position, size, length, shape, material, orientation, and the like of each component can be changed as appropriate.

  For example, in the above embodiment, the film is conveyed laterally (horizontally), and the top seal device exemplifies sealing and cutting by approaching and separating from the vertical vertical direction, but the present invention is not limited to this. The film can be conveyed vertically in the vertical direction, and can be sealed and cut by approaching and separating horizontally by a top seal device.

DESCRIPTION OF SYMBOLS 1 packaging machine 2 article supply apparatus 3 film supply apparatus 4 packaging machine main body 8 raw material shaft 14 bag making machine 16 center seal apparatus 17 transport apparatus 20 transport apparatus 100 top seal apparatus 110 first seal unit 120 first sealer 130 cutter unit 132 Cutter 150 Second seal unit 112 First base 114 First fixed base 152 Second base 154 Second fixed base 160 Second sealer 200 Gazette forming mechanism 210 Gazette unit 230 Moving mechanism 232 Guide rail 234 Slider 236 Slide plate 238 Motor 239 Rocking shaft 300 Gusset claw 300A Upstream side gusset claw 300B Downstream side gusset claw 302A Upstream side pushing portion 302B Downstream side pushing portion 303 article moving portion 305 inclined surface 305A inclined portion T contact position TO1 Top seal portion X 1 article

Claims (9)

A pair of sealers extending in a second direction orthogonal to the first direction with respect to a cylindrical packaging film which contains an article and is continuous in the first direction, a third pair orthogonal to the first direction and the second direction A gusset forming mechanism which folds the packaging film to form a gusset when the packaging film is sealed by approaching and abutting in a direction.
On the downstream side of the pair of sealers, a pair of pushing portions for pushing the packaging film inward from both sides in the second direction;
A moving mechanism for moving the pair of push-in portions in the second direction;
Respectively provided on the pair of push portions, e Bei an article moving portion for moving the article in a downstream direction along with the movement of the pair of push portion,
The push-in portion has a V-shaped plate member which is opened so that the distance in the third direction is gradually separated along the first direction.
The article moving unit is provided between the plate members facing each other, and is an inclined surface including an inclined portion that is inclined to be displaced outward in the second direction from the upstream side to the downstream side in the first direction. is there,
Gazette forming mechanism characterized by The inclined portion is provided at least at a position near the center in the third direction of the packaging film.
The gusset forming mechanism according to claim 1, characterized in that: On the upstream side of the pair of sealers, there is another pair of pushing portions for pushing the packaging film inward in the second direction,
The gusset forming mechanism according to claim 1 or 2, characterized in that: A gusset forming mechanism according to any one of claims 1 to 3 .
And a sealing mechanism which brings the sealing surfaces of the pair of sealers into proximity in the third direction to seal the packaging film.
Top seal device characterized in that . A supply device for supplying the packaging film;
A bag making apparatus for bending the packaging film supplied from the supply apparatus in the width direction to form a tubular shape ;
A center seal device for performing a center seal on the packaging film formed into a tubular shape downstream of the bag making device;
The top seal device according to claim 4, wherein the center-sealed packaging film is sealed in the width direction at a predetermined interval .
Packaging machine characterized by . A pair of sealers extending in a second direction orthogonal to the first direction with respect to a cylindrical packaging film which contains an article and is continuous in the first direction, a third pair orthogonal to the first direction and the second direction A gusset forming method of forming a gusset by folding the packaging film at the time of sealing the packaging film by advancing and retracting a pair of push-in portions along the second direction while making them approach and abut in directions.
The push-in portion has a V-shaped plate member which is opened so that the distance in the third direction gradually separates along the first direction,
When folding the packaging film along with the movement of the push-in portion, the packaging film is provided so as to be opposed between the plate members, and is displaced outward in the second direction from the upstream side to the downstream side in the first direction. The article moving means, which is an inclined surface including the inclined portion, is moved inward in the second direction from the outer side to the inner side of the sealer via the packaging film so as to move the article downstream. Move to the side,
Gazette forming method characterized by The articles are supplied in parallel along the second direction in an upright state, and are enclosed in the packaging film.
The method for forming a gusset according to claim 6, characterized in that : A gusset is formed by the gusset molding method according to any one of claims 6 and 7, and the sealing surfaces of the pair of sealers are made to approach the third direction to seal the packaging film.
A top seal method characterized in that . A supplying step of supplying the packaging film;
A bag making step of bending the supplied packaging film in the width direction to form a tubular shape;
Center sealing step of center sealing the cylindrically formed packaging film;
A top sealing step of sealing the packaging film center-sealed in the width direction at predetermined intervals by the top sealing method according to claim 8 ;
Equipped with
Packaging method characterized by

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