JP5909080B2 - Packaging method and packaging machine - Google Patents

Description

  The present invention relates to a packaging method and a packaging machine for packaging an article with a continuously supplied packaging material.

  In a packaging line for packaging articles such as foods and daily necessities, articles are successively supplied to a packaging machine and individually wrapped with a packaging material such as a film. Specifically, a packaging material such as a film is continuously supplied to the packaging machine as the articles are sequentially supplied, and the bag is formed into a cylindrical shape. In the process in which the packaging material is formed into a cylindrical shape, articles are sequentially supplied, and then both side edges of the packaging material are center-sealed. Then, end sealing (lateral sealing) and cutting are performed in the width direction of the packaging material at predetermined pitches, and each article is packaged. At the time of end sealing, there is a case where air is vented at the same time. For example, there is known a method in which a packaging material is fixed from the top while striking a downstream end to remove excess air inside (see Patent Document 1). ).

Japanese Patent No. 4321933

  However, it is difficult to effectively remove the air that has circulated to the side of the article, and it cannot be tightly packaged. Such a problem is not limited to the case where the packaging material is formed into a cylindrical shape while wrapping the article, and may exist in common when the article is encapsulated in the packaging bag in advance.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a packaging method and a packaging machine capable of effectively removing air from a packaging material or a packaging bag.

(1) The present invention continuously supplies a strip-shaped packaging material in the conveying direction of the article and supplies the article to the inside while making a bag in a cylindrical shape, and then the packaging material on the downstream side in the conveying direction of the article and then on the upstream side. In the packaging method for packaging the article by transversely sealing and cutting the article in the width direction, a regulating means for regulating expansion of the packaging material after the downstream transverse sealing step of transversely sealing on the downstream side of the article, the packaging material interposed therebetween so as to face the top and left and right side surfaces of the article, and a near step of positioning in proximity state that can limit the range of movement of the packaging material leaving a gap between said article, said regulating means the A downstream pressing step for pressing the downstream degassing means from the downstream side to push the air in the packaging material to the upstream side from the planned position of the lateral seal performed on the upstream side of the article, with respect to the packaging material in the proximity state ; Downstream pressing After extent, characterized in that it shifts to the upstream lateral sealing process of the transverse seal and cut at the upstream side of the article, a wrapping method.

(2) The present invention is also a packaging method in which a packaging bag containing articles is transported and the opening is laterally sealed in the width direction for packaging, and the packaging bag is transported upstream in the transport direction. On the other hand, the restricting means for restricting the expansion of the packaging bag is opposed to the upper surface and both the left and right side surfaces of the article with the packaging bag in between, and the packaging bag is moved leaving a gap with the article. extruding a near step of positioning in proximity state that can limit the scope, the relative said packaging bag is a regulating means the proximity state, from the opening the air in the packaging bag from the downstream side against the downstream degassing unit It is a packaging method characterized by shifting to a downstream pressing step and an upstream horizontal sealing step of laterally sealing the opening of the packaging bag after the downstream pressing step.

  (3) The present invention also includes an upstream sandwiching step in which the space between the article and the planned position of the lateral seal in the upstream lateral sealing step is vertically sandwiched by the upstream degassing means until the upstream lateral sealing step. The packaging method according to (1) or (2) above, wherein

  (4) The present invention is also the packaging method according to (3) above, wherein the upstream lateral sealing step is performed simultaneously with the upstream sandwiching step.

  (5) The present invention is also the packaging method according to any one of (1) to (4) above, wherein the article is bread.

(6) The present invention also provides a bag-making means for forming a continuously supplied belt-shaped packaging material into a cylindrical shape while wrapping the conveyed article, and the packaging material on the upstream side and the downstream side of the article. Transverse sealing means for transversely sealing and cutting in the width direction, and downstream of the transverse sealing means in the conveyance direction of the article, the packaging material is sandwiched between the upper surface and the left and right side faces of the article contained therein. A restricting means for restricting expansion of the packaging material by being positioned in a proximity state that opposes and leaves a gap between the article and restricts a movement range of the packaging material; and the restricting means is the proximity And a downstream deaeration unit that presses the packaging material in a state from the downstream side and pushes air in the packaging material to an upstream side of the lateral sealing unit.

(7) The present invention also includes a transport surface for transporting the packaging bag containing the article with the opening facing upstream, and a lateral sealing means for laterally sealing the opening in the width direction. The means moves the packaging bag downstream of the means in the conveying direction so as to face the upper surface and both the left and right side surfaces of the enclosed article with a gap between the packaging bag and the article. A restricting means for restricting expansion of the packaging bag by being positioned in a proximity state that can limit a range; and the air in the packaging bag is pressed from the downstream side against the packaging bag in the proximity state by the restricting means And a downstream deaeration means for extruding to the upstream side of the lateral seal means.

  According to the inventions of the above (1), (2), (6) and (7), the regulating means is brought close to the upper side of the article and the left and right sides along the conveying direction. It is possible to prevent the packaging bag from bulging unnecessarily above the article or from the left and right sides. That is, it is possible to prevent air from staying above the article and from the left and right sides. Since a gap is left between the regulating means and the article, an air flow path is formed between the article and the packaging material or packaging bag above and on the left and right sides of the article. For this reason, when the downstream deaeration means is pressed against the packaging material or the packaging bag from the downstream of the article, the air remaining on the downstream side of the article can be sent upstream through the flow path.

  At this time, since the air flow rate in the flow path is limited and the air remaining on the downstream side of the article cannot be discharged at a stretch, the packaging material or the Reaction force works from the packaging bag. For this reason, a packaging material or a packaging bag is crushed gradually, without collapsing at a stretch. As a result, the gusset part etc. currently formed in the packaging material or the packaging bag will not be broken, and the packaging material or the packaging bag can keep its appearance clean.

  (8) The present invention is also characterized by comprising an upstream deaeration unit between the lateral sealing unit and the regulating unit and sandwiching the packaging material up and down while leaving a gap on the upstream side of the article. The packaging machine according to (6) or (7) above.

  According to the inventions of the above (3) and (8), it is possible to cope with an aspect in which a once opened seal can be resealed with a binding margin closed by a binding member such as a closure.

  (9) The present invention is also the packaging machine according to any one of (6) to (8) above, wherein the article is bread.

According to the packaging method described in the above (1) to (5) and the packaging machine described in (6) to (9) of the present invention, the air in the packaging material or the packaging bag (in the packaged product) is effective. Exit.
(10) The present invention also supplies the article inside while continuously supplying the strip-shaped packaging material in the conveyance direction of the article to form the bag into a cylindrical shape, and the packaging is performed on the downstream side in the conveyance direction and then on the upstream side of the article. In the packaging method of packaging the article by transversely sealing and cutting the material in the width direction, a regulating means for regulating expansion of the packaging material after the downstream transverse sealing step of transversely sealing the downstream side of the article, the packaging A proximity step of facing the upper surface and both left and right side surfaces of the article with a material sandwiched between them and leaving a gap between the article and the packaging material in which the regulating means is located downstream A downstream pressing step of pressing the downstream degassing means from the side to push the air in the packaging material to the upstream side from the planned position of the lateral seal performed on the upstream side of the article, and the upstream side of the article after the downstream pressing step Horizontal seal and An upstream horizontal sealing step for cutting, and upstream between the article and the planned position of the horizontal seal in the upstream horizontal sealing step by the upstream deaeration means while leaving a gap by the upstream horizontal sealing step It is a packaging method characterized by including a pinching process.
(11) The present invention also relates to a packaging method for transporting a packaging bag containing an article and laterally sealing the opening in the width direction and packaging the packaging bag, wherein the opening is transported upstream in the transport direction. On the other hand, the restricting means for restricting the expansion of the packaging bag is opposed to the upper surface and both the left and right side surfaces of the article with the packaging bag interposed therebetween, and is in a proximity state while leaving a gap between the article A downstream pressing step of pressing downstream deaeration means from the downstream side to push the air in the packaging bag from the opening, and after the downstream pressing step, An upstream lateral sealing step that laterally seals the opening of the packaging bag, and the upstream deaeration means between the article and a predetermined position of the lateral sealing in the upstream lateral sealing step by the upstream lateral sealing step. While leaving a gap Characterized in that it comprises an upstream nip step sandwiched a packing method.
(12) The present invention also provides a bag-making means for forming a continuously supplied belt-like packaging material into a cylindrical shape while wrapping the conveyed article, and the packaging material on the upstream side and the downstream side of the article. Transverse sealing means for transversely sealing and cutting in the width direction, and downstream of the transverse sealing means in the conveyance direction of the article, the packaging material is sandwiched between the upper surface and the left and right side faces of the article contained therein. Opposing and restricting means for restricting the expansion of the packaging material by being in a proximity state while leaving a gap between the article, and pressing the packaging material from the downstream side, the air in the packaging material A downstream deaeration means for pushing the upstream side of the lateral sealing means; an upstream deaeration means for sandwiching the packaging material up and down while leaving a gap on the upstream side of the article, between the lateral sealing means and the regulating means; , Be prepared And wherein the Rukoto, a packaging machine.
(13) The present invention also includes a transport surface for transporting the packaging bag containing the article with the opening facing upstream, and a lateral sealing means for laterally sealing the opening in the width direction. On the downstream side of the means in the conveying direction of the article, the packaging bag is sandwiched so as to be opposed to the upper surface and both the left and right side surfaces of the article, and be in close proximity with a gap between the article. A regulating means for regulating the expansion of the packaging bag, a downstream degassing means for pushing the air in the packaging bag to the upstream side of the transverse sealing means by pressing against the packaging bag from the downstream side, and the transverse sealing means, An upstream deaeration unit that is sandwiched between the regulation unit and sandwiches the packaging bag up and down while leaving a gap on the upstream side of the article.
According to the inventions of the above (10) to (13), since the restricting means is brought close to the upper side of the article and the left and right sides along the conveying direction, the restricting means allows the packaging material or the packaging bag to be placed on the upper side and the left and right sides of the article. It is possible to prevent swelling from side by side. That is, it is possible to prevent air from staying above the article and from the left and right sides. Since a gap is left between the regulating means and the article, an air flow path is formed between the article and the packaging material or packaging bag above and on the left and right sides of the article. For this reason, when the downstream deaeration means is pressed against the packaging material or the packaging bag from the downstream of the article, the air remaining on the downstream side of the article can be sent upstream through the flow path.

It is a front view which shows the outline of the packaging machine which concerns on this invention. It is the figure which looked at the end seal apparatus in the packaging machine shown in FIG. 1 in the direction of arrow II. It is a figure which shows the cam groove and cam floor in the end seal apparatus shown in FIG. It is a perspective view which shows the sealer and each part of the circumference | surroundings in the end seal apparatus shown in FIG. It is the figure which looked at the expansion control apparatus in the packaging machine shown in FIG. FIG. 4 is a partial cross-sectional view of the end seal device shown in FIG. 2 as viewed in the direction of an arrow VIA, illustrating a box motion operation of the sealer. It is a figure explaining the motion of the 1st interlocking mechanism shown in FIG. FIG. 7 is a diagram for explaining the movement of the first interlocking mechanism shown in FIG. 4 and shows the continuation of the movement shown in FIG. It is a figure explaining the motion of the 2nd interlocking mechanism shown in FIG. It is a figure explaining the motion of the 2nd interlocking mechanism shown in FIG. 4, and shows the continuation of the motion shown in FIG. It is a figure which illustrates schematically the motion of the packaging machine shown in FIG. It is a figure explaining the movement of the packaging machine shown in FIG. 1 in detail.

  Hereinafter, the packaging machine according to the present invention will be described in detail with reference to the drawings.

  First, the structure of the packaging machine 10 is demonstrated using FIGS. FIG. 1 is a front view showing an outline of the packaging machine 10. FIG. 2 is a view of the end seal device 13 viewed in the direction of arrow II in FIG. FIG. 3 is a view showing the cam groove 71 a and the cam floors 72 and 73 in the end seal device 13. FIG. 4 is a perspective view showing the sealer 38 and its surrounding parts. FIG. 5 is a view of the expansion regulating device 15 viewed in the direction of the arrow V.

  In addition, please refer to FIGS. 6-12 as needed. Moreover, in each figure, a part of structure is abbreviate | omitted suitably and drawing is simplified. Furthermore, the directions in the following description refer to the directions in the drawings unless otherwise specified.

  The packaging machine 10 shown in FIG. 1 is a so-called horizontal pillow packaging machine, which uses the packaging material YA1 such as a resin film that is continuously supplied along the conveying direction, and the bread bread XA1 that is sequentially supplied from the previous process. It is packaged one by one without stopping while transporting from upstream to downstream. For the packaging, a mode is adopted in which the opened seal is closed with a bundling member such as a closure to enable resealing. In FIG. 1, the left side is the upstream and the right side is the downstream. In addition, although this embodiment demonstrates to the case where the bread bread XA1 is packaged as an example, the packaging machine of this invention can be used in order to package various articles | goods, such as other breads.

  The packaging machine 10 includes a belt conveyor 11 that is an upstream conveying means disposed on the upstream side, a belt conveyor 12 that is a downstream conveying means subsequent to the belt conveyor 11, and an upstream side of the belt conveyor 11 for packaging. A bag making machine (not shown) for bag making the material YA1, a center seal device (not shown) arranged next to the bag making machine for center sealing the packaging material YA1, and the belt conveyors 11 and 12 for packaging. An end seal device 13 for end-sealing and cutting the material YA1, an upstream deaeration device 14 for extracting air in the packaging material YA1 on the upstream side of the bread pan XA1, and the packaging material YA1 when extracting air in the packaging material YA1 Restricting device 15 for restricting the expansion amount of the packaging material YA1 by restricting the range of movement, belt conveyors 11 and 12, and upstream deaeration The interlocking mechanism 16 (see FIG. 4) that links the operation of the device 14 with the operation of the end seal device 13, the downstream deaeration device 75 that extracts the air in the packaging material YA1 on the downstream side of the bread pan XA1, and the operation of each part And a control unit (not shown) for overall control. Hereinafter, each structure of the packaging machine 10 is demonstrated.

  The control unit (not shown) includes 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 for the CPU. The ROM stores a basic OS and programs executed by the CPU.

  The bag making device (not shown) is disposed on the upstream side of the belt conveyor 11. This bag making machine makes a bag-shaped packaging material YA1 continuously supplied to the bread bread XA1 into a cylindrical shape along the longitudinal direction of the packaging material YA1 while wrapping the bread bread XA1. That is, the bag making machine functions as a bag making means for making a bag-like packaging material YA1 that is continuously supplied together with the center seal device to be described below into a cylindrical shape while wrapping the bread bread XA1 being conveyed.

  (Center Seal Device) The center seal device (not shown) is arranged downstream of the bag making machine. This center seal device performs center seal in the conveying direction on both side edges of the packaging material YA1 formed in a cylindrical shape.

  The belt conveyor 11 has an annular belt 17 that functions as a conveying surface that travels from upstream to downstream with the bread bread XA1, one or more rollers (not shown) arranged on the upstream side, and a downstream side. Rollers 18 and 19 arranged, rollers 20 and 21 for adjusting the length of the belt, driving rollers (not shown) connected to a motor (not shown), a fixed frame for supporting each component and movement A frame (not shown), and the like.

  The belt 17 is connected endlessly with an upstream traveling surface 17a that travels from upstream to downstream and a return surface 17b that is disposed along the lower side of the upstream traveling surface 17a and travels from downstream to upstream. Has been. The belt 17 conveys the bread bread XA1 wrapped in the packaging material YA1 formed in a cylindrical shape on the upstream running surface 17a. The belt 17 travels by rotation of a driving roller (not shown).

  The rollers 18 to 20 are rotatably attached to a moving frame (not shown), and can move forward and backward in the traveling direction of the upstream traveling surface 17a by the reciprocating movement of the moving frame. That is, when the moving frame moves in the downstream direction, the upstream traveling surface 17a is extended in the downstream direction, but at this time, the interval between the roller 20 and the roller 21 supported by the fixed frame is reduced, The extra length of the belt 17 stored during this time is paid out. On the other hand, when the moving frame moves in the upstream direction, the upstream side running surface 17a is shortened, and the extra length of the belt 17 generated thereby is absorbed by increasing the distance between the roller 20 and the roller 21.

  According to the above rollers 18 to 21 and a roller (not shown), the belt 17 extends horizontally from the upper part of the roller (not shown) arranged on the upstream side toward the upper part of the roller 18 arranged on the downstream side. The belt 17 extends obliquely downward from the side of the roller 18 toward the side of the roller 19. Next, the belt 17 extends horizontally from the lower part of the roller 19 toward the upper part of the roller 20. Further, the belt 17 extends horizontally from the lower part of the roller 20 toward the upper part of the roller 21. Further, the belt 17 extends horizontally from the lower part of the roller 21 toward the lower part of a roller (not shown) arranged on the upstream side.

  The belt conveyor 12 includes an annular belt 23 that functions as a conveying surface that travels from upstream to downstream with the bread bread XA1, rollers 24 to 29 disposed on the upstream side, and rollers that adjust the length of the belt 23. 30 and 31, a driving roller 32 connected to a motor (not shown), a roller 33 provided in the vicinity of the roller 32, a roller 34 arranged on the downstream side, and a fixed supporting each component A frame, a moving frame (not shown), and the like.

  The belt 23 is connected endlessly with a downstream traveling surface 23a that travels from upstream to downstream and a return surface 23b that is disposed along the lower side of the downstream traveling surface 23a and travels from downstream to upstream. Has been. In this belt 23, the bread bread XA1 taken over from the belt conveyor 11 is placed on the downstream running surface 23a. The belt 23 travels by the rotation of the roller 32.

  The rollers 24 to 30 are rotatably attached to a moving frame (not shown), and can move forward and backward in the traveling direction of the downstream traveling surface 23a by the reciprocating movement of the moving frame. The rollers 24, 26, and 28 are arranged in the vicinity of the end seal device 13 at intervals in the traveling direction along the downstream traveling surface 23 a. The roller 25 is disposed below the rollers 24 and 26 between the rollers 24 and 26. The roller 25 causes the belt 23 to detour downward with the rollers 24 and 26 as fulcrums. The roller 27 is disposed below the rollers 26 and 28 between the rollers 26 and 28. The roller 27 causes the belt 23 to detour downward with the rollers 26 and 28 as fulcrums. In this way, the rollers 25 and 27 divide the downstream running surface 23a into a plurality of pieces in the running direction.

  When the moving frame moves in the upstream direction, the downstream running surface 23a is extended in the upstream direction. At this time, the distance between the roller 30 and the roller 31 supported by the fixed frame is reduced, The extra length of the accumulated belt 23 is paid out. On the other hand, when the moving frame moves in the downstream direction, the downstream running surface 23a is shortened, and the extra length of the belt 23 generated thereby is absorbed by increasing the distance between the roller 30 and the roller 31.

  The roller 32 is rotatably attached to the fixed frame. The roller 32 rotates upon receiving the rotational power of a motor (not shown). The roller 33 is rotatably attached to the fixed frame. The roller 33 is provided for the purpose of increasing the winding angle of the belt 23 around the roller 32. The roller 34 is rotatably attached to the fixed frame. The roller 34 folds the belt 23 from the downstream running surface 23a to the return surface 23b. Each of the rollers 24 to 31, 33, 34 other than the roller 32 rotates as the belt 23 travels.

  According to the rollers 24 to 34 described above, the belt 23 extends horizontally from the upper part of the roller 28 disposed on the upstream side toward the upper part of the roller 34 disposed on the downstream side. During this time, the belt 23 is detoured downward by the roller 27 with the rollers 26 and 28 as fulcrums, and is detoured downward by the roller 25 with the rollers 24 and 26 as fulcrums.

  The belt 23 extends obliquely downward from the lower part of the roller 34 toward the lower part of the roller 32. Further, the belt 23 extends obliquely upward from the side portion of the roller 32 to the roller 28 disposed on the upstream side. During this time, the belt 23 is arranged in a zigzag manner by the rollers 29 to 31 and 33.

  The end seal device 13 shown in FIGS. 1 and 2 is disposed between the belt conveyors 11 and 12 downstream from the bag making machine in a fixed position. This end seal device 13 functions as a horizontal sealing means for cutting and cutting the packaging material YA1 formed in a cylindrical shape in the width direction of the running surfaces 17a and 23a.

  Specifically, the description will be made based on the bread loaf XA1 as a reference. The end seal device 13 end-seals and cuts the packaging material YA1 in the width direction on the downstream side of the reference bread XA1 to form a bag shape. Thereafter, the reference bread XA1 is conveyed downstream, and the end seal device 13 end-seals and cuts the packaging material YA1 in the width direction on the upstream side of the reference bread XA1. Note that the end sealing operation of the end seal device 13 on the upstream side of the reference bread XA1 is an end seal operation on the downstream side of the subsequent bread XA1 when viewed from the bread XA1 subsequent to the reference bread XA1. is there.

  The end seal device 13 includes sealers 37 and 38 that are disposed in the longitudinal direction along the width direction of the packaging material YA1 so as to face the upper and lower sides of the packaging material YA1, and a holding unit 39 that holds the sealers 37 and 38. , 40, and a pair of rotating disks 41 that support the sealer 37 via a holding portion 39 and rotate around the horizontal axis, and a pair of rollers that support the sealer 38 via the holding portion 40 and rotate around the horizontal axis. A rotating disk 42; a pair of side plates 71 arranged on the sides of the rotating disks 41, 42; cam floors 72, 73 provided at the ends of the shafts of the holding portions 39, 40; and the like. Yes.

  The upper sealer 37 is lifted and lowered by a slide bar (not shown) spanned between the holding portion 39 and the holding portion 40 while maintaining a downward posture. The lower sealer 38 is moved up and down by the slide bar while maintaining an upward posture. The lower sealer 38 is lowered when the upper sealer 37 is raised, and is raised when the upper sealer 37 is lowered. When the sealer 37 reaches the lowest position and the sealer 38 reaches the highest position, the sealers 37 and 38 end-seal the packaging material YA1 and cut it with a built-in cutter. Thus, the sealers 37 and 38 function as sealing means that sandwich and seal the packaging material YA1.

  The holding unit 39 holds the sealer 37 downward. The holding portion 39 is supported at an eccentric position of the pair of rotating disks 41, and revolves around the rotation axis 41 b of the rotating disk 41 while maintaining the posture by the rotation of the rotating disks 41. Go up and down. The holding unit 40 holds the sealer 38 upward. The holding portion 40 is also supported at an eccentric position of the pair of rotating disks 42, and revolves around the rotating shaft 42b while maintaining the posture by the rotation of the rotating disks 42 around the rotating shaft 42b. It goes up and down.

  The pair of rotating disks 41 are attached to the machine frame (not shown) so as to be rotatable about a horizontal axis so that the plate surfaces face each other. The pair of rotating disks 41 are connected to a motor (not shown) and rotate around the horizontal axis by the power of the motor. The pair of rotating disks 41 is moved up and down by rotating around the horizontal axis and revolving the sealer 37 around the horizontal axis.

  The pair of rotating disks 42 are attached to a machine frame (not shown) so as to be rotatable about a horizontal axis so that the plate surfaces face each other. The holding portions 39 and 40 are connected to the rotating disks 41 and 42 via sliders 39a and 40a. That is, sliders 39a and 40a that are movable along the grooves 41a and 42a are incorporated in notches 41a and 42a formed in the rotating disks 41 and 42 from the outer peripheral edge toward the center. The sliders 39a and 40a are formed with through holes (reference numerals omitted) through which the shafts of the holding portions 39 and 40 are rotatably inserted, and tip portions of the shafts of the holding portions 39 and 40 inserted through the through holes. Are attached with cam floors 72 and 73. The cam floors 72 and 73 are respectively guided to upper and lower cam grooves 71a formed in the side plate 71 when the rotary disks 41 and 42 rotate. As shown in FIG. 3, the cam groove 71a is an annular groove having a straight portion in part, and is formed vertically symmetrical so that the straight portions are adjacent to each other. Thereby, the sealers 37 and 38 can hold | maintain the state which pinched | interposed packaging material YA1 in the linear part of the cam groove 71a.

  The upstream deaerator 14 shown in FIGS. 1 and 4 is provided upstream of the expansion restriction device 15. The upstream deaerator 14 includes a lower deaerator 44 and an upper deaerator 45. The lower deaeration device 44 and the upper deaeration device 45 cooperate with each other to remove air in the packaging material YA1 on the upstream side of the bread bread XA1.

  The lower deaeration device 44 is provided along a gap in the downstream traveling surface 23a divided into a plurality (see FIG. 11B), and has a long lower push portion 46 that pushes the packaging material YA1 from below. A sponge sheet 47 that covers the upper surface of the lower pressing portion 46 and a fixed support member 48 that supports both ends of the lower pressing portion 46 from below are provided.

  The lower pressing portion 46 is disposed flush with the downstream running surface 23a and functions as a transition member that bridges between the gaps. The lower push portion 46 can be moved only in the vertical direction by a guide member (not shown). The lower push portion 46 is pushed up from below by the interlocking mechanism 16 and rises. The sponge sheet 47 is interposed between the lower pressing portion 46 and the packaging material YA1. The sponge sheet 47 functions as a cushion and prevents the packaging material YA1 from being scratched by the lower pressing portion 46. The fixed support member 48 is fixed to a moving frame (not shown) constituting the belt conveyor 12 and is attached so as to be able to advance and retract in the traveling direction of the downstream traveling surface 23a. The fixed support member 48 advances and retreats integrally with the rollers 24 to 30.

  The upper deaeration device 45 includes a sponge block 49 that functions as an upper pressing portion that pushes the packaging material YA1 from above, a cylinder 50 that raises and lowers the sponge block 49, and the like. The sponge block 49 is lowered when the lower push portion 46 is raised, and is raised when the lower push portion 46 is lowered. The upper deaeration device 45 may be fixed without being lifted or lowered.

  The upstream deaeration device 14 operates at a predetermined timing, which will be described later, when the end seal device 13 end seals and cuts the packaging material YA1, so that the lower push portion 46 reaches the uppermost position and the sponge. The block 49 reaches the lowest position, the packaging material YA1 is sandwiched up and down, and the air in the packaging material YA1 is extracted. That is, the lower pressing portion 46 and the sponge block 49 function as upstream deaeration means for sandwiching the packaging material YA1 up and down on the upstream side of the bread bread XA1. Note that the position where the lower pressing portion 46 and the sponge block 49 sandwich the packaging material YA1 can be adjusted by the height of the bread bread XA1 that is the product.

  The expansion regulating device 15 shown in FIGS. 1 and 5 is provided on the further downstream side of the upstream deaeration device 14 following the end seal device 13 above the belt conveyor 12. The expansion regulating device 15 includes a sponge block 52 that is brought into a close state while leaving a gap between the outer side of the packaging material YA1 and the bread bread XA1, and a cylinder 53 that moves the sponge block 52 up and down. A pair of sponge blocks 81 that are placed in close proximity while leaving a gap with the bread bun XA1 from the outside of the packaging material YA1 to the left and right sides along the conveying direction of the bread bun XA1, and a pair for advancing and retracting the pair of sponge blocks Cylinder 82 and the like. The sponge block 52 and the pair of sponge blocks 81 are interlocked with each other. The intervals when these sponge blocks 52 and 81 are closest to the bread bread XA1 are each preferably 2 mm or more and 10 mm or less, and more preferably 3 mm or more and 5 mm or less.

  The above expansion regulating device 15 operates at a predetermined timing, which will be described later, when the upstream deaeration device 14 and the downstream deaeration device 75 deaerate the inside of the packaging material YA1, and thereby the sponge block 52 and the pair of sponge blocks 81. At the same time close to the bread bread XA1, limiting the range of movement of the packaging material YA1 to prevent the packaging material YA1 from swelling unnecessarily. That is, the sponge block 52 and the pair of sponge blocks 81 function as a restricting unit that restricts the movement range of the packaging material YA1 and restricts the expansion of the packaging material YA1.

  Further, a downstream deaeration device 75 is disposed on the downstream side of the expansion regulating device 15. The downstream deaeration device 75 includes a support arm 75a that can be rotated in the traveling direction on the downstream traveling surface 23a, a contact portion 75b provided at a tip portion of the support arm 75a, and the like. . The base end portion serving as the rotation center of the support arm 75a is located at a sufficient height so as not to interfere with the bread bread XA1 serving as a product, and is approximately 90 ° counterclockwise from the vertical state (see FIG. 11A) (see FIG. 11). 11 (B)). The downstream deaeration device 75 performs deaeration in cooperation with the upstream deaeration device 14 and the expansion restriction device 15. That is, as will be described later, the downstream deaeration device 75 rotates the support arm 75a clockwise in association with the operation timing of the upstream deaeration device 14 and the expansion restriction device 15, and the contact portion 75b It is pressed against the packaging material YA1 from the downstream side of the bread loaf XA1, and the air in the packaging material YA1 is sent to the upstream side. That is, deaeration is performed by the operation of the downstream deaeration device 75. When the deaeration is completed, the support arm 75a is rotated counterclockwise to prepare for the next deaeration. Since the contact part 75b is formed of a soft material such as sponge, the bread bread XA1 and the packaging material YA1 that are products are not damaged. The abutting portion 75b functions as a downstream deaeration unit that presses against the packaging material YA1 from the downstream side of the bread bread XA1 and sends the air in the packaging material YA1 to the upstream side.

  The interlocking mechanism 16 shown in FIG. 4 includes a first interlocking mechanism 55 that interlocks an operation in which the upstream traveling surface 17a expands and contracts and an operation in which the downstream traveling surface 23a expands and contracts with an operation in which the sealer 38 moves up and down. And a second interlocking mechanism 56 that interlocks the movement of the pusher 46 with the movement of the sealer 38.

  The first interlocking mechanism 55 is formed with an upstream plate 57 attached to the holding portion 40 that holds the sealer 38, a cam floor 58 fixed to the upstream plate 57, and a groove 59 a that guides the cam floor 58. The guide member 59, the downstream plate 60 attached to the holding portion 40 that holds the sealer 38, the cam floor 61 fixed to the downstream plate 59, and the guide 62 in which the groove 62 a for guiding the cam floor 61 is formed. And a member 62.

  The upstream plate 57 is provided on each side of the upstream running surface 17a in the width direction. The cam floor 58 is provided on each side of the upstream traveling surface 17a in the width direction corresponding to each upstream plate 57. These cam floors 58 revolve around the horizontal axis by the revolution of the holding portion 40 around the horizontal axis.

  The guide members 59 are provided in the width direction of the upstream running surface 17a corresponding to the cam floors 58, respectively. Each guide member 59 is fixed to a moving frame (not shown) that constitutes the belt conveyor 11, and is movable forward and backward in the traveling direction of the upstream traveling surface 17a. Therefore, the guide member 59 advances and retreats integrally with the rollers 18 to 20. The groove 59a formed in the guide member 59 has a bent shape. The guide member 59 advances and retreats together with the rollers 18 to 20 in the traveling direction of the upstream traveling surface 17a by the revolution of the cam floor 58 around the horizontal axis.

  The downstream plates 60 are respectively provided on both sides in the width direction of the downstream running surface 23a. The cam floors 61 are respectively provided on both sides in the width direction of the downstream running surface 23 a corresponding to the respective downstream plates 60. These cam floors 61 revolve around the horizontal axis by the revolution of the holding portion 40 around the horizontal axis.

  The guide members 62 are provided in the width direction of the downstream running surface 23a corresponding to the cam floors 61, respectively. Each guide member 62 is fixed to a moving frame (not shown) that constitutes the belt conveyor 12, and is movable forward and backward in the traveling direction of the downstream traveling surface 23a. Therefore, the guide member 62 advances and retreats integrally with the rollers 24-30. The groove 62a formed in the guide member 62 has a linear shape extending in the vertical direction. The guide member 62 advances and retreats together with the rollers 24 to 30 in the traveling direction of the downstream traveling surface 23 a by the revolution of the cam floor 61 around the horizontal axis.

  The second interlocking mechanism 56 includes a plate 63 attached to the holding unit 40 that holds the lower sealer 38, and an elevating support member 64 fixed to the plate 63.

  The plates 63 are provided on both sides in the width direction of the downstream running surface 23a. The elevating support members 64 are respectively provided on both sides in the width direction of the downstream running surface 23 a corresponding to each plate 63. These elevating support members 64 are formed with notches 64a for hooking the end portions of the lower push portions 46. The elevating support member 64 revolves around the horizontal axis by the revolution of the holding unit 40 around the horizontal axis. The elevating support member 64 raises the lower pressing portion 46 supported by the fixed support member 48 by pushing it up from below.

  According to the above interlocking mechanism 16, the end seal device performs the operation of expanding and contracting the upstream traveling surface 17 a, the operation of expanding and contracting the downstream traveling surface 23 a, and the operation of lifting and lowering the lower pressing portion 46 in the upstream deaerator 14. The sealer 38 in FIG. Thereby, the sealing device 13 occupies the center of the packaging machine 10.

  Next, the effect | action of the packaging machine 10 is demonstrated based on FIGS. FIG. 6 is a partial cross-sectional view of the end seal device 13 as viewed in the direction of VIA shown in FIG. 2 and is a view for explaining the box motion operation of the sealers 37 and 38. Specifically, FIG. 6 (A) shows a state in which the packaging material YA1 is being sandwiched by the sealers 37 and 38. In this state, the packaging material YA1 moves downstream with the packaging material YA1 for a predetermined time (or distance). FIG. 6B shows a state in which the sandwiching of the packaging material YA1 by the sealers 37 and 38 is released. FIG. 6C shows a state where the sealers 37 and 38 are farthest from each other. FIG. 6D shows a state immediately before the packaging material YA1 is sandwiched between the sealers 37 and 38. FIG.

  FIG. 7 is a diagram for explaining the movement of the first interlocking mechanism 55. FIGS. 7A and 7B correspond to FIGS. 6A and 6B, respectively. FIG. 8 is a diagram for explaining the movement of the first interlocking mechanism 55 and shows the continuation of the movement shown in FIG. FIGS. 8A and 8B correspond to FIGS. 6C and 6D, respectively. 7 and 8, the illustration of the state in which the belt 23 bypasses downward and divides the downstream running surface 23a into a plurality of parts is omitted.

  FIG. 9 is a diagram for explaining the movement of the second interlocking mechanism 56. FIGS. 9A and 9B correspond to FIGS. 6A and 6B, respectively. 99 is a diagram for explaining the movement of the second interlocking mechanism 56, and shows the continuation of the movement shown in FIG. FIGS. 10A and 10B correspond to FIGS. 6C and 6D, respectively. FIG. 11 is a diagram schematically illustrating the movement of the packaging machine 10. FIG. 12 is a diagram for explaining the movement of the packaging machine 10 in detail. 6 to 12, as in FIG. 1, the left side is the upstream side and the right side is the downstream side.

  The end seal device 13 repeatedly operates in the order of FIG. 6 (A) → FIG. 6 (B) → FIG. 6 (C) → FIG. 6 (D) → FIG. Specifically, the pair of rotating disks 41 rotate around the horizontal axis by the power of a motor (not shown). The rotating disk 41 rotates so that the lower half proceeds from the upstream side to the downstream side, and the upper half returns from the downstream side to the upstream side.

  As the pair of rotating disks 41 rotate around the horizontal axis, the sealer 37 revolves around the horizontal axis. The sealer 37 advances from the upstream side to the downstream side from the horizontal axis serving as the center of revolution (see FIG. 6 (D) → FIG. 6 (A) → FIG. 6 (B)), and above the horizontal axis, It revolves in the direction returning from the downstream side to the upstream side (see FIG. 6 (B) → FIG. 6 (C) → FIG. 6 (D)). The revolving sealer 37 is maintained in a downward orientation by a slide bar (not shown) spanned between the holding portion 39 and the holding portion 40.

  The pair of rotating disks 41 rotate around the horizontal axis, while the pair of rotating disks 42 rotate in the opposite directions around the horizontal axis. The rotating disk 42 rotates so that the upper half advances from the upstream side to the downstream side and the lower half returns from the downstream side to the upstream side.

  As the pair of rotating disks 42 rotate around the horizontal axis, the sealer 38 revolves around the horizontal axis. The sealer 38 advances from the upstream side to the downstream side from the horizontal axis serving as the center of revolution (see FIG. 6 (D) → FIG. 6 (A) → FIG. 6 (B)), and below the horizontal axis, It revolves in the direction returning from the downstream side to the upstream side (see FIG. 6 (B) → FIG. 6 (C) → FIG. 6 (D)). The revolving sealer 38 is maintained in an upward posture by a slide bar (not shown).

  According to the end seal device 13 described above, the sealant 37 and 38 can sandwich the packaging material YA1 up and down to end seal and cut. Since the end seal device 13 advances the sealers 37 and 38 from the upstream side to the downstream side according to the flow of the packaging material YA1 (see FIG. 6D → FIG. 6A → FIG. 6B), it is smooth. The packaging material YA1 is sandwiched with a gentle flow.

  The first interlocking mechanism 55 repeatedly operates in the order of FIG. 7 (A) → FIG. 7 (B) → FIG. 8 (A) → FIG. 8 (B) → FIG. Specifically, as the pair of rotating disks 42 rotate around the horizontal axis, the holding portion 40 that holds the sealer 38 (see FIG. 2) revolves around the horizontal axis. The holding unit 40 advances from the upstream side to the downstream side from the horizontal axis serving as the center of revolution (see FIG. 8B → FIG. 7A → FIG. 7B), and downward from the horizontal axis. Then, it revolves in the direction returning from the downstream side to the upstream side (see FIG. 7B → FIG. 8A → FIG. 8B).

  As the holding portion 40 revolves around the horizontal axis, the cam floor 58 attached to the holding portion 40 via the upstream plate 57 revolves around the horizontal axis. The cam floor 58 advances from the upstream side to the downstream side from the horizontal axis serving as the center of revolution (see FIG. 8 (B) → FIG. 7 (A) → FIG. 7 (B)), and below the horizontal axis, It revolves in the direction returning from the downstream side to the upstream side (see FIG. 7B → FIG. 8A → FIG. 8B).

  As the cam floor 58 revolves around the horizontal axis, the guide member 59 that guides the cam floor 58 advances and retreats in the traveling direction of the upstream traveling surface 17a. The guide member 59 advances from the upstream side to the downstream side when the cam floor 58 is positioned above the horizontal axis that is the center of revolution (see FIG. 8 (B) → FIG. 7 (A) → FIG. 7 (B)). . Further, the guide member 59 does not substantially advance or retreat when the cam floor 58 is positioned downstream from the horizontal axis serving as the center of revolution (see FIG. 7B → FIG. 8A). Further, when the cam floor 58 is positioned on the upstream side and below the horizontal axis that is the center of revolution, the guide member 59 retracts from the downstream side to the upstream side (see FIG. 8A → FIG. 8B). ).

  When the guide member 59 moves back and forth in the travel direction of the upstream travel surface 17a, the rollers 18 to 20 (see FIG. 1) move forward and backward integrally with the guide member 59, and the upstream travel surface 17a expands and contracts. When the guide member 59 and the rollers 18 to 20 are integrated with each other and travel from the upstream side to the downstream side, the upstream running surface 17a extends to the downstream side (FIG. 8 (B) → FIG. 7 (A) → FIG. 7 (B)). Further, the upstream running surface 17a does not substantially expand and contract when the guide member 59 and the rollers 18 to 20 are not substantially advanced and retracted together (see FIG. 7B → FIG. 8A). Further, when the guide member 59 and the rollers 18 to 20 are integrated with each other, the upstream running surface 17a contracts to the upstream side when retreating from the downstream side to the upstream side (FIG. 8A → FIG. 8B). reference).

  Further, when the holding portion 40 revolves around the horizontal axis, the cam floor 61 attached to the holding portion 40 via the downstream plate 60 revolves around the horizontal axis. The cam floor 61 advances from the upstream side to the downstream side from the horizontal axis serving as the center of revolution (see FIG. 8 (B) → FIG. 7 (A) → FIG. 7 (B)), and below the horizontal axis, It revolves in the direction returning from the downstream side to the upstream side (see FIG. 7B → FIG. 8A → FIG. 8B).

  As the cam floor 61 revolves around the horizontal axis, the guide member 62 that guides the cam floor 61 advances and retreats in the traveling direction of the downstream traveling surface 23a. The guide member 62 advances from the upstream side to the downstream side when the cam floor 61 is located above the horizontal axis that is the center of revolution (see FIG. 8 (B) → FIG. 7 (A) → FIG. 7 (B)). . Further, the guide member 62 retreats from the downstream side to the upstream side when the cam floor 61 is positioned below the horizontal axis that is the center of revolution (FIG. 7 (B) → FIG. 8 (A) → FIG. 8 (B). reference).

  As the guide member 61 advances and retreats in the running direction of the downstream running surface 23a, the rollers 24 to 30 (see FIG. 1) move forward and backward together with the guide member 62, and the downstream running surface 23a expands and contracts. When the guide member 62 and the rollers 24 to 30 are integrated and advance from the upstream side to the downstream side, the downstream running surface 23a contracts to the downstream side (FIG. 8 (B) → FIG. 7 (A) → FIG. 7 (B)). Further, when the guide portion 62 and the rollers 24 to 30 are integrated and the downstream running surface 23a is retracted from the downstream side to the upstream side, the downstream side running surface 23a extends to the upstream side (FIG. 7B → FIG. 8A). (See FIG. 8B).

  According to the first interlocking mechanism 55 described above, when the upstream travel surface 17a extends downstream, the downstream travel surface 23a contracts downstream, and the distance between the upstream travel surface 17a and the downstream travel surface 23a. Is kept constant (see FIG. 8B → FIG. 7A → FIG. 7B). Further, when the upstream traveling surface 17a does not substantially expand and contract, the downstream traveling surface 23a extends upstream, and the distance between the upstream traveling surface 17a and the downstream traveling surface 23a is close (FIG. 7B → FIG. 8). (See (A)). Further, when the upstream traveling surface 17a contracts to the upstream side, the downstream traveling surface 23a extends to the upstream side by a small amount compared to the contraction amount of the upstream traveling surface 17a, and the upstream traveling surface 17a and the downstream traveling surface 17a The distance between the side running surfaces 23a is separated (see FIG. 8A → FIG. 8B). Thus, according to the first interlocking mechanism 55, when the packaging material YA1 is sandwiched up and down by the sealers 37 and 38, the distance between the upstream traveling surface 17a and the downstream traveling surface 23a is separated (FIG. 8A). ) → See FIG. 8B) Further, according to the first interlocking mechanism 55, after the upper and lower sandwiching of the packaging material YA1 by the sealers 37 and 38 is released, the upstream running surface 17a and the downstream running surface 23a are released. Are close to each other (see FIG. 7B → FIG. 8A).

  The second interlocking mechanism 56 repeatedly operates in the order of FIG. 9 (A) → FIG. 9 (B) → FIG. 10 (A) → FIG. 10 (B) → FIG. 9 (A). Specifically, the pair of rotating disks 42 revolves around the horizontal axis. The holding part 40 advances from the upstream side to the downstream side from the horizontal axis as the center of revolution (see FIG. 10B → FIG. 9A → FIG. 9B), and downward from the horizontal axis. Then, it revolves in the direction returning from the downstream side to the upstream side (see FIG. 9B → FIG. 10A → FIG. 10B).

  When the holding part 40 revolves around the horizontal axis, the elevating support member 64 attached to the plate 63 revolves around the horizontal axis. The elevating support member 64 advances from the upstream side to the downstream side from the horizontal axis serving as the center of revolution (see FIG. 10 (B) → FIG. 9 (A) → FIG. 9 (B)) and downward from the horizontal axis. In Fig. 9, it revolves in the direction returning from the downstream side to the upstream side (see Fig. 9B-> Fig. 10A-> Fig. 10B).

  The lower pressing portion 46 supported by the fixed support member 48 (see FIG. 4) is a case where the elevating support member 64 revolves below the horizontal axis serving as the center of revolution and revolves upstream (0 o'clock at 12 o'clock). In the clockwise direction (between 180 and 270 °), that is, when the elevating support member 64 rises and retreats upstream, the elevating support member 64 rises while retreating upstream in conjunction with the elevating support member 64. Is pushed up from below to rise (see FIG. 10A → FIG. 10B).

  Further, the lower push portion 46 is provided when the lifting support member 64 revolves above the horizontal axis serving as the center of revolution and upstream, that is, when the lifting support member 64 rises and travels downstream. (270 to 360 °), and proceeds to the downstream side integrally with the lifting support member 64, and is further lifted by being lifted from below by the lifting support member 64 that rises (FIG. 10 (B) → FIG. 9 (A)). reference).

  Further, the lower pressing portion 46 is provided when the elevating support member 64 revolves downstream (0 to 90 °) above the horizontal axis that is the center of revolution (ie, when the elevating support member 64 is lowered). When proceeding to the downstream side, it proceeds to the downstream side together with the lifting support member 64 and descends (see FIG. 9 (A) → FIG. 9 (B)).

  And the lower side push part 46 is, when the raising / lowering support member 64 revolves downstream (90-180 degrees) below the horizontal axis used as a revolution center, ie, the raising / lowering support member 64 descend | falls. When retreating to the upstream side, it descends integrally with the lifting support member 64, is supported by the fixed support member 48 (see FIG. 4), and moves away from the lifting support member 64 (FIG. 9B → FIG. 10A). reference).

  The packaging machine 10 repeatedly and continuously operates in the order of FIG. 11 (A) → FIG. 11 (B) → FIG. 11 (A) under the control of the control unit. Specifically, the bread pan XA1 wrapped in the packaging material YA1 formed into a cylindrical shape during the running of the belt 17 in the belt conveyor 11 is end-sealed and cut in the end seal device 13 on the downstream side and the upstream side of the bread pan XA1. As a single packaged product, it is handed over to the downstream belt conveyor 12 (bag making process → downstream horizontal sealing process →... → upstream horizontal sealing process). In addition, in order to form the extension part used as the binding allowance for bundling the upper part of a package (packaging bag) with a closure, bread | pan XA1 is supplied to the packaging material YA1 at some intervals (refer FIG.11 (B)). ).

  The control unit operates the upstream deaeration device 14, the expansion restriction device 15, and the downstream deaeration device 75 in association with the timing of end sealing. Specifically, as shown in FIGS. 12A and 12B, the control unit first operates the expansion regulating device 15 to extend from the outside of the packaging material YA1 above the bread pan XA1 and along the conveying direction. Further, the sponge blocks 52 and 81 are brought close to each other while leaving a gap with the bread bread XA1 to restrict the movement range of the packaging material YA1, thereby preventing the packaging material YA1 from bulging unnecessarily ( Proximity process). When the sponge blocks 52 and 81 are brought close to the bread pan XA1, when the upstream deaeration device 14 deaerates the air, it becomes difficult to live downstream. And before operating the downstream deaerator 75, the control unit starts the operation of the upstream deaerator 14 as shown in FIG. 12C (start of the upstream sandwiching step). That is, the control unit performs an upstream sandwiching operation in which the packaging material YA1 is sandwiched up and down by the lower pressing portion 46 and the sponge block 49 on the upstream side of the bread pan XA1 where the sponge blocks 52 and 81 of the expansion regulating device 15 are in the proximity state. Let it begin. In addition, as shown in FIG. 12D, the control unit operates the downstream deaeration device 75 during the upstream sandwiching operation by the upstream deaeration device 14, and the sponge block 52, The abutting portion 75b is pressed against the packaging material YA1 from the downstream side of the bread bread XA1 in which 81 is in the proximity state, and the air in the packaging material YA1 is sent upstream (downstream pressing step). Note that the timing of starting the operation of the downstream deaerator 75 is preferably as late as possible, and more preferably immediately before the upstream sandwiching operation by the upstream deaerator 14 is completed. After that, as shown in FIG. 12E, the control unit completes the upstream sandwiching operation by the upstream degassing device 14 immediately after the operation of the downstream degassing device 75 is completed (completion of the upstream sandwiching process). The control unit operates the end seal device 13 simultaneously with the operation of the upstream deaeration device 14 to end-seal and cut the packaging material YA1 in the width direction (upstream lateral sealing step).

  When the end seal is completed, as shown in FIG. 12 (F), the upper and lower sealers 37 and 38 are separated from each other, and the upstream deaerator 14, the expansion regulating device 15 and the downstream deaerator 75 are returned to the standby position. At the same time, the belt conveyors 11 and 12 approach each other, so that the subsequent bread XA1 is smoothly transferred from the belt conveyor 11 to the belt conveyor 12. This series of processes is continuously repeated, and packaged products of the bread loaf XA1 are produced one after another.

  Thus, according to the packaging machine 10, the upstream deaeration device 14 that moves up and down in synchronization with the timing of the end seal device 13 that sandwiches the packaging material YA1 up and down to end-seal sandwiches the packaging material YA1 up and down. Therefore, by setting the packaging material YA1 to be sandwiched in the vicinity of half the height of the article, the air in the packaging material YA1 is effectively released and an abnormal tension acts on one of the upper side or the lower side of the packaging material YA1. Can be avoided, and the bread XA1 is not crushed when the air in the packaging material YA1 is evacuated. Further, since the upstream deaeration device 14 is provided in the region of the belt conveyor 12, the distance between the belt conveyor 11 and the belt conveyor 12 is set as compared with the case where it is assumed that the upstream deaeration device 14 is provided between the belt conveyor 11 and the belt conveyor 12. There is no need to make it wide. By setting the interval as narrow as possible, the bread bread XA1 can be handed over from the belt conveyor 11 to the belt conveyor 12 with a smooth flow.

  And since the sponge blocks 52 and 81 are brought close to the upper side of the bread pan XA1 and the left and right sides along the conveying direction, the packaging material YA1 swells unnecessarily above the bread pan XA1 and right and left sides. Can be prevented. That is, it is possible to prevent air from staying above the bread loaf XA1 or on the left and right sides. Since a gap is left between the sponge blocks 52 and 81 and the bread bread XA1, an air flow path is formed between the bread bread XA1 and the packaging material YA1 above and to the left and right sides of the bread bread XA1. For this reason, when the contact part 75b is pressed against the packaging material YA1 from the downstream side of the bread pan XA1, the air remaining on the downstream side of the bread pan XA1 can be sent upstream through the flow path. As a result, the air in the packaging material YA1 is effectively removed.

  At this time, the flow rate of air in the flow path is limited, and the air remaining on the downstream side of the loaf bread XA1 cannot be exhausted at a stroke. Therefore, the abutting portion 75b that presses the packaging material YA1 is opposed to the packaging material YA1. Power works. For this reason, the packaging material YA1 is gradually crushed without being crushed at once. As a result, the gusset portion and the like formed on the packaging material YA1 are not broken, and the packaging material YA1 can keep its appearance clean. Such an effect is not only due to the fact that the air flow path is formed between the bread bread XA1 and the packaging material YA1 with the sponge blocks 52 and 81 in the proximity of the bread bread XA1. That is, the effect increases by forming a flow path between the packaging materials YA1 by the operation of the upstream degassing device 14. Moreover, it can respond to the aspect which makes it possible to open the seal once provided with the binding margin closed with binding members, such as a closure.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea thereof.

  That is, in the above embodiment, the position, size, shape, material, orientation, quantity, and the like of each component can be changed as appropriate. For example, the quantity of the lower pressing part 46 is mentioned.

  Alternatively, in the above-described embodiment, the downstream side running surface 23a divided into a plurality of running directions is configured by the belt 23 of the belt conveyor 12. However, the bread bread XA1 may be transported from the upstream side to the downstream side, and is arranged at intervals. You may comprise by several rollers.

  Alternatively, in the above embodiment, as the upstream deaeration means for sandwiching the packaging material YA1 up and down on the upstream side of the bread bread XA1, the upstream depressurization in which the lower pressing portion 46 (sponge sheet 47) and the sponge block 49 are raised and lowered respectively. Although the air supply device 14 is provided, an upstream deaeration device that lowers only a member such as a sponge block that moves up and down above the packaging material YA1 toward the downstream running surface 23a of the belt conveyor 12 may be provided. Good.

  Or in the said embodiment, you may comprise the member comprised with sponge by the jersey.

  Alternatively, in the above embodiment, either the upper sponge block 52 or the pair of sponge blocks 81 on the left and right sides, or both of them may be fixed immovably.

  Or in the said embodiment, you may make it use the packaging material bag-made in bag shape beforehand. That is, the bread bags XA1 are packed in a pre-manufactured packaging bag, transported to the end seal device 13 with the mouth (opening) facing upstream, and the mouth is sealed in the end seal device 13 in the width direction. It may be sealed.

DESCRIPTION OF SYMBOLS 10 Packaging machine 11, 12 Belt conveyor 13 End seal apparatus 14 Upstream deaeration apparatus 15 Expansion control apparatus 16 Interlock mechanism 17 Belt 17a Upstream running surface 17b Return surface 18-21 Roller 23 Belt 23a Downstream running surface 23b Return surface 24 34 Roller 37, 38 Sealer 39, 40 Holding part 39a, 40a Slider 41, 42 Rotating disc 41a, 42a Notch groove 41b, 42b Rotating shaft 44 Lower deaerator 45 Upper deaerator 46 Lower push part 47 Sponge sheet 48 fixed support member 49 sponge block 50 cylinder 52 sponge block 53 cylinder 55 first interlocking mechanism 56 second interlocking mechanism 57 upstream plate 58 cam floor 59 guide member 59a groove 60 downstream plate 61 cam floor 62 guide member 62a groove 63 Plate 64 Elevating support member 64a Notch 71 Side plate 71a Cam groove 72, 73 Cam floor 75 Downstream deaerator 75a Support arm 75b Abutting part 81 Sponge block 82 Cylinder XA1 Bread YA1 Packaging material

Claims (13)

While continuously supplying the belt-shaped packaging material in the conveyance direction of the article and making the bag into a cylindrical shape, the article is supplied to the inside, and the packaging material is laterally sealed in the width direction on the downstream side in the conveyance direction and then on the upstream side. In a packaging method for packaging the article by cutting,
After the downstream horizontal sealing step of performing horizontal sealing on the downstream side of the article, a regulating means for regulating expansion of the packaging material is opposed to the upper surface and the left and right side surfaces of the article with the packaging material interposed therebetween, and Proximity step of positioning in a proximity state that can limit the movement range of the packaging material leaving a gap in between,
Relative to the packaging material the regulating means is in the proximity state, the air in the packaging material from the downstream side against the downstream degassing unit, pushing the upstream side of the intended location of the transverse seals carried on the upstream side of the article Downstream pressing process;
After the downstream pressing step, the packaging method is characterized in that a transition is made to an upstream horizontal sealing step of performing horizontal sealing and cutting on the upstream side of the article. In a packaging method of carrying a packaging bag containing an article and packaging the opening by transverse sealing in the width direction,
With respect to the packaging bag conveyed toward the upstream in the conveyance direction, the regulating means for regulating expansion of the packaging bag is opposed to the upper surface and the left and right side surfaces of the article with the packaging bag interposed therebetween, And the proximity process which positions in the proximity state which can limit the movement range of the packaging bag leaving a gap between the articles,
To said packaging bag wherein the regulating means is in the proximity state, a downstream pressing extruding the air in the packaging bag from the downstream side against the downstream degassing unit from the opening,
After the downstream pressing step, the packaging method is shifted to an upstream horizontal sealing step in which the opening of the packaging bag is laterally sealed.   Including an upstream sandwiching step of sandwiching the article and the planned position of the lateral seal in the upstream lateral sealing step up and down while leaving a gap by the upstream degassing means by the upstream lateral sealing step, The packaging method according to claim 1 or 2.   The packaging method according to claim 3, wherein the upstream side sealing step is performed simultaneously with the upstream sandwiching step.   The packaging method according to claim 1, wherein the article is bread. Bag-making means for making a continuous supply of belt-like packaging material into a cylindrical shape while wrapping the articles being conveyed;
Lateral sealing means for laterally sealing and cutting the packaging material in the width direction on the upstream side and downstream side of the article,
On the downstream side of the horizontal sealing means in the conveying direction of the article,
Across the packaging material is positioned in a proximity state that can limit the range of movement of the packaging material leaving a gap between the upper surface of the article being enclosed and opposed to the left and right sides, and the article A regulation means for regulating the expansion of the packaging material,
A downstream deaeration unit that presses the regulation unit against the packaging material in the proximity state from the downstream side to push the air in the packaging material to the upstream side of the lateral sealing unit, Machine. A transport surface for transporting the packaging bag containing the article with the opening facing upstream;
Horizontal sealing means for laterally sealing the opening in the width direction,
On the downstream side of the horizontal sealing means in the conveying direction of the article,
Across the packaging bag, it is positioned in a proximity state that can limit the range of movement of the packaging bag, leaving a gap between the upper surface of the article being enclosed and opposed to the left and right sides, and the article A regulating means for regulating the expansion of the packaging bag,
A downstream deaeration unit that presses the regulation unit against the packaging bag in the proximity state from the downstream side and pushes the air in the packaging bag to the upstream side of the lateral seal unit; Machine. The apparatus further comprises an upstream deaeration unit between the lateral sealing unit and the regulating unit and sandwiching the packaging material or the packaging bag up and down while leaving a gap on the upstream side of the article. Or the packaging machine of 7.   The packaging machine according to any one of claims 6 to 8, wherein the article is bread. While continuously supplying the belt-shaped packaging material in the conveyance direction of the article and making the bag into a cylindrical shape, the article is supplied to the inside, and the packaging material is laterally sealed in the width direction on the downstream side in the conveyance direction and then on the upstream side. In a packaging method for packaging the article by cutting,
After the downstream horizontal sealing step of performing horizontal sealing on the downstream side of the article, a regulating means for regulating expansion of the packaging material is opposed to the upper surface and the left and right side surfaces of the article with the packaging material interposed therebetween, and A proximity process to make a proximity state while leaving a gap in between,
Downstream of pushing the air in the packaging material from the downstream side to the upstream side of the planned position of the lateral seal performed on the upstream side of the article against the packaging material in close proximity to the regulating means Pressing process;
After the downstream pressing step, and having an upstream horizontal sealing step of performing horizontal sealing and cutting on the upstream side of the article,
Including an upstream sandwiching step of sandwiching the article and the planned position of the lateral seal in the upstream lateral sealing step up and down while leaving a gap by the upstream degassing means by the upstream lateral sealing step,
Packaging method. In a packaging method of carrying a packaging bag containing an article and packaging the opening by transverse sealing in the width direction,
With respect to the packaging bag conveyed toward the upstream in the conveyance direction, the regulating means for regulating expansion of the packaging bag is opposed to the upper surface and the left and right side surfaces of the article with the packaging bag interposed therebetween, And the proximity process which makes it a proximity state, leaving a clearance gap between the said articles | goods,
A downstream pressing step of pressing downstream deaeration means from the downstream side to push out air in the packaging bag from the opening to the packaging bag in which the regulating means is in proximity;
After the downstream pressing step, and having an upstream horizontal sealing step for horizontally sealing the opening of the packaging bag,
Including an upstream sandwiching step of sandwiching the article and the planned position of the lateral seal in the upstream lateral sealing step up and down while leaving a gap by the upstream degassing means by the upstream lateral sealing step,
Packaging method. Bag-making means for making a continuous supply of belt-like packaging material into a cylindrical shape while wrapping the articles being conveyed;
Lateral sealing means for laterally sealing and cutting the packaging material in the width direction on the upstream side and downstream side of the article,
On the downstream side of the horizontal sealing means in the conveying direction of the article,
A regulating means for regulating the expansion of the packaging material by facing the upper surface and both the left and right side surfaces of the enclosed article with the packaging material interposed therebetween and leaving a gap with the article. When,
A downstream degassing unit that presses against the packaging material from the downstream side and pushes the air in the packaging material to the upstream side of the lateral sealing unit;
An upstream degassing means for sandwiching the packaging material up and down while leaving a gap on the upstream side of the article, between the lateral sealing means and the regulating means,
Packaging machine. A transport surface for transporting the packaging bag containing the article with the opening facing upstream;
Horizontal sealing means for laterally sealing the opening in the width direction,
On the downstream side of the horizontal sealing means in the conveying direction of the article,
A restricting means for restricting the expansion of the packaging bag by facing the upper surface and the left and right side surfaces of the article enclosed with the packaging bag interposed therebetween and leaving a gap between the packaging bag and the article. When,
A downstream degassing unit that presses against the packaging bag from the downstream side and pushes the air in the packaging bag to the upstream side of the lateral sealing unit;
An upstream deaeration unit between the horizontal sealing unit and the regulating unit and sandwiching the packaging bag up and down while leaving a gap on the upstream side of the article,
Packaging machine.

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