JP2021187531A - Packaging method, packaging device, and package thereof - Google Patents

Abstract

To provide a package suitable for packaging an object to be stored such as a sandwich.SOLUTION: There is provided a package comprising one plastic film sheet 3 that exhibits a hollow substantially hexahedral body, and an object 1 to be stored that is stored in an internal space of the film sheet 3, and comprising a stripe-like front upper thick part To that extends from a front surface part 2aa of the hexahedral body to an upper surface part 2cc, and a stripe-like rear upper thick part that extends from a rear surface part 2bb to the upper surface part 2cc. Each of the front upper thick part To and the rear upper thick part Ta partially seals the film sheet 3. The front upper thick part To is folded on surfaces of the front surface part 2aa and the upper surface part 2cc. The rear upper thick part Ta is folded on surfaces of the rear surface part 2bb and the upper surface part 2cc. In a side view, the front upper thick part To constitutes a substantially L-shaped angle bent at an angle formed by the front surface part 2aa and the upper surface part 2cc, and the rear upper thick part Ta constitutes a substantially L-shaped angle bent at an angle formed by the rear surface part 2bb and the upper surface part 2cc.SELECTED DRAWING: Figure 7

Description

The present invention relates to a packaging method, a packaging device, and a package thereof.

The inventor of the present application has previously proposed a wrapping body using a film sheet, a wrapping body in which the upper part of a cooking pan in which ingredients such as yakisoba bread and hot dogs are exposed from the upper part is hard to be crushed, and a wrapping method and a wrapping device thereof. (Patent Document 1).
The packaged object is a center seal that extends back and forth between the top seal and the tail seal by the top seal and the tail seal that are supported by the gussets located in front of and behind the packaged object (cooking pan) and stand up. While maintaining the space between the two, the upper part of the cooking pan was protected by standing upright like a chicken crown.
The left and right sides of the top seal and tail seal are connected to the left and right sides of the center seal so that they are flush with each other. Make sure to secure a space between them (Fig. 1).
The package having such a device is excellent in preventing the force from being applied from the outside of the package to the upper part of the cooking pan.

Japanese Patent Application Laid-Open No. 2018-16390

On the other hand, the package in which the center seal is erected is difficult to stack up and down, that is, it is difficult to stack vertically. In particular, when a plurality of the relevant packages are vertically stacked and packed in a box, the fit is poor.
On the other hand, it is not preferable to simply eliminate the center seal that strongly protects the package in order to maintain the shape of the package.
For example, a sandwich has a rectangular parallelepiped sandwiched between rectangular pans, and has an almost rectangular parallelepiped shape as a whole. Was in the applicant.
However, there is a concern that a rectangular parallelepiped package lacking a center seal will be crushed when the load of the upper package is applied to the lower package due to vertical stacking.

The present invention has been made in view of such a situation, and aims to provide a packaging body, a packaging method, and a packaging device that realize strong packaging while eliminating the center seal.

The present invention comprises one film sheet and an object to be packaged on the film sheet, and the surface on which the object to be packaged is placed as an inner surface of the film sheet, and the film sheet is left and right from the object to be packaged. A top seal that seals the left and right inner surfaces of the film sheet in a state of being overlapped in front of the packaged object with the left and right side ends that squeeze out toward the upper side of the packaged object, and the packaged material. The back of the package is provided with a tail seal that seals the left and right inner surfaces of the film sheet so as to overlap each other, the top seal extends up and down in front of the package, and the tail seal is the cover. It extends up and down behind the package, and the bottom side of the film sheet on which the package is placed is located between the top seal and the package and between the tail seal and the package. A package provided with a gusset, the tail seal comprising a pre-folded portion for folding the top seal toward the packaged object side of the package body with a crease between the top seal and the packaged object. A back-folded portion for folding the tail seal toward the packaged object side of the package is provided with a crease between the and the packaged object, and the portion of the front-folded portion above the packaged object is rearward. It is provided with a front-middle stacking portion in which the upper end side of the top seal is placed directly above the packaged object, and the portion of the rear-folding portion above the packaged object is folded forward and the upper end of the tail seal is provided. It is provided with a rear-middle stacking portion in which the portion side is arranged directly above the packaged object, and the left and right end portions of the film sheet located above the packaged object on the left and right sides of the packaged object are each in the upper left stacking portion. And the upper right overlapping portion, one of the upper left overlapping portion and the upper right overlapping portion overlaps the front middle overlapping portion and the rear middle overlapping portion, and the other one of the upper left overlapping portion and the upper right overlapping portion is the upper left. Provided is a package which is overlapped on one of the overlapped portion and the upper right overlapping portion, and is provided with a fixing portion for fixing at least the overlapping upper left overlapping portion to the upper right overlapping portion.
Further, in the present invention, the film sheet has a substantially rectangular shape mainly made of plastic, and the left and right end edges of the film sheet protruding from the packaged object to the left and right are left and right of the rectangular shape. It is possible to provide a package which is a heat-sealed portion composed of a heat-sealed portion or a hot-melt portion provided with a hot-melt adhesive.
Further, the present invention includes a single film sheet with the inner surface facing up and an object to be packaged placed on the inner surface, and the film sheet has left and right side ends protruding from the packaged object to the left and right upward. The top seal that seals the left and right inner surfaces of the film sheet in a state of being overlapped in front of the packaged object and the left and right inner surfaces of the film sheet are overlapped in the rear of the packaged object. The top seal extends up and down in front of the packaged object, the tail seal extends up and down behind the packaged object, and the packaged object is placed on the top seal. The bottom side of the film sheet is provided with a gusset between the top seal and the packaged object and between the tail seal and the packaged object, and is processed for a package having an opening at the top. A packaging device having the following configuration is provided.
That is, this packaging device has a front folding action part, a back folding action part, a front middle stacking action part, a back middle stacking action part, an upper left overlapping action part, an upper right overlapping action part, and a fixing action part. The front folding action portion is provided so as to project relatively toward the packaging body from either the left or right side of the packaging body toward the packaging body, and the space between the top seal and the packaged object is used as a crease. A front-folding portion for folding the top seal toward the packaged object side of the package is formed on the package, and the back-folding action portion is directed toward the package from either the left or right side of the package. The tail seal is folded toward the packaged object side of the package body with the tail seal and the packaged object as a crease, and the post-folded portion is the package body. The front-middle stacking action portion is formed so as to relatively protrude from the front of the package toward the package, and the portion of the front-folded portion above the packaged object is formed. A front middle stacking portion that is folded rearward and the upper end portion side of the top seal is arranged directly above the packaged object is formed on the package body, and the rear middle stacking action portion is formed from the rear side of the package body to the package body. It protrudes relatively toward the package, folds the portion of the rear-folded portion above the packaged object forward, and arranges the upper end side of the tail seal directly above the packaged object. The rear-middle stacking portion is formed on the package, and the upper left stacking action portion projects relatively toward the package from the left side of the package toward the package, and the front-middle stack portion and the said An upper left overlapping portion that directly or indirectly overlaps the rear middle overlapping portion is formed on the package, and the upper right overlapping action portion is relative to the package from the right side of the package toward the package. An upper right overlapping portion that directly or indirectly overlaps the front middle stacking portion and the rear middle stacking portion is formed on the package, and the fixing action portion is formed by a heat seal or a hot melt adhesive. At least, a fixing portion for fixing the upper left overlapping portion and the upper right overlapping portion that overlap each other is formed on the package.
Further, in the present invention, the package before processing is conveyed with the top seal side as the front and the tail seal side as the rear, and the front folding operation portion, the back folding operation portion, and the packaging body. Is provided with a moving device for moving the front and rear in a direction intersecting the direction of the transport, the transport direction is the front-rear direction, and the front-folding action portion is a plate-shaped one with the front and back sides facing the front and back, and the front-folding operation. The portion is located on the opposite side of the front folding action portion on the left and right sides of the package, and the front folding operation portion is displaced along the rear surface of the front folding action portion to be displaced along the rear surface of the front folding action portion, and the top seal of the package and the cover. It presses between the package and the package, and the front-folding action portion is relatively close to the package because the package is displaced in the direction of the pressing by the pressing of the front-folding operation portion. The front-folding portion is formed on the package, the back-folding action portion is a plate-shaped one having front and back sides, and the back-folding operation portion is for the left and right sides of the package. Located on the opposite side of the back-folding action portion, the back-folding action portion is displaced along the front surface of the back-folding action portion and presses between the tail seal of the package and the packaged object. When the package is displaced in the direction of the pressure due to the pressure of the back-folding operation portion, the back-folding action portion protrudes relatively with respect to the package and the back-folding portion is folded. A portion is formed on the package, and one of the upper left overlapping action portion and the upper right overlapping acting portion is a rotating arm member, and the tip is swung down by the rotation, so that the arm member is attached to the package. It protrudes relatively toward the package to form either the upper left overlapping portion or the upper right overlapping portion, and the other one of the upper left overlapping acting portion and the upper right overlapping acting portion is formed. It is a plate-shaped member having front and back sides, and is provided at a position lower than the upper end of the package before forming the front middle stack portion and the rear middle stack portion and higher than the packaged object in the vertical direction. In the left-right direction, the plate-shaped member is provided on the opposite side of the package with respect to the tip of the arm member to be swung down, and the moving device moves the package under the plate-shaped member. As a result, the plate-shaped member protrudes relatively toward the package and forms the other one of the upper left overlapping portion and the upper right overlapping portion. It was possible to provide a packaging device for forming the fixing portion for the package in which the upper left overlapping portion and the upper right overlapping portion are formed.
Furthermore, in the present invention, the front-folding action portion and the back-folding action portion are located on the same side on the left and right sides of the package, and the distance between the front-folding action portion and the back-folding action portion is the front. The width is smaller than the front-rear width of the package before the formation of the folded portion and the rear-folded portion, and is larger than the front-rear width of the packaged object. Both are located on the left and right sides of the package on the opposite side of the front folding action portion and the back folding action portion, and the front folding action portion and the back folding action portion are integrally operated and simultaneously operated. It has been possible to provide a packaging device including a lateral actuating device for performing the pressing operation.
Further, the present invention is a transport device provided with a transport means for transporting an object to be packaged from upstream to downstream, and a film sheet supply device that supplies a strip-shaped film sheet side by side with the transport surface of the transport device. When the strip-shaped film sheet is supplied from the film sheet supply device to the transport surface side, the film sheet is U. A former that bends in a shape is provided, and the objects to be packaged are sequentially placed on the film sheet that is bent in a U shape by the former so as to be separated from each other. A tail seal device that forms a tail seal that extends vertically to the rear of the packaged object that precedes the packaged objects that are separated from each other, and a subsequent tail seal device that forms a tail seal that extends vertically to the rear of the packaged object that precedes the packaged items that are separated from each other. It has a top sealing device that forms a top seal that extends vertically to the front of the packaged object, and the tail sealing device overlaps and seals the left and right inner surfaces of the film sheet behind the preceding packaged object. The tail seal is sequentially formed on the preceding package of the packaged object, and the top sealing device superimposes and seals the left and right inner surfaces of the film sheet in front of the subsequent packaged object. The top seal is sequentially formed on the package of the packaged object, and the wrinkle removing device is provided. It has been possible to provide a packaging device for processing a package formed by a packaging device that stretches a portion forming a tail seal and suppresses wrinkles from remaining on the top seal and the tail seal after formation. ..
Further, the present invention has been able to provide a packaging method using any of the above packaging devices.
Further, the present invention comprises a single plastic film sheet which is a hollow substantially hexahedron having an upper surface portion, a lower surface portion, a front surface portion, a rear surface portion, a left side surface portion, and a right side surface portion by being partially folded. A package including an object to be accommodated in the internal space of the film sheet, a streaky front upper thick portion arranged so as to continuously extend from the front surface portion to the upper surface portion, and the rear surface portion. A streak-shaped rear upper thick portion is provided so as to extend continuously from the upper surface portion to the upper surface portion, and each of the front upper thick portion and the rear upper thick portion partially seals the film sheet. The front upper thick portion is folded over the surfaces of the front surface portion and the upper surface portion, and the rear upper thick portion is folded over the surfaces of the rear surface portion and the upper surface portion. In the side view of the package, the front upper thick portion constitutes a substantially L-shaped angle that bends at an angle formed by the front surface portion and the upper surface portion, and the rear upper thick portion constitutes the rear. It has been possible to provide a package having a substantially L-shaped angle that bends at an angle formed by a surface portion and the upper surface portion.

By implementing the present invention, the above problems could be solved.
That is, it is possible to firmly protect the packaged object against the force from the outside of the package body for the package body not provided with the center seal.
In particular, it is possible to eliminate the center seal that stands up like a chicken comb, it is easy to stack multiple packages vertically, and when packing them in a box, the storage in the box is good. In particular, even if the center seal is eliminated, in the present invention, the upper end side of the top seal is directly above the packaged object as the front-middle layered portion in which the portion above the packaged object in the front-folded portion is folded rearward. By arranging the tail seal on the upper end side of the tail seal directly above the packaged object as a rear-middle layered portion in which the portion above the packaged object in the rear-folded portion is folded forward, the load from above causes the arrangement. I made it hard to collapse.
That is, in the present invention, the front and rear seal portions (top seal and tail seal) are used to make the package less likely to be crushed than the package having no seal portion.
At the embodiment level of the invention, the present invention has been able to provide a package particularly suitable for a sandwich having a substantially rectangular parallelepiped as an object to be packaged.
In addition, the appearance is important to motivate consumers to buy sweets such as Western confectionery and Japanese confectionery, but the present invention improves the aesthetic appearance of the package by eliminating the center seal such as a comb. rice field.
In particular, the present invention uses the technique realized in Patent Document 1 (Japanese Patent Laid-Open No. 2018-16390) for effectively suppressing wrinkles on the top seal and the tail seal during packaging, and the top seal and the tail seal are folded and packaged. The aesthetics of the body have been improved and the packaging has been made compact.
In the present invention, the seal portion (top seal and tail seal) is forcibly bent into an L shape to form an angle, and strength that replaces the formation of the center seal can be secured.
Further, in particular, in the present invention of claim 6, it is possible to carry out the loading and unloading of the package at the same time for each of the upstream stage and the downstream stage that perform different processes of packaging, and the efficiency of packaging is realized. ..

(A) is a schematic perspective view showing an outline of the packaged object of the package according to the present invention in a transparent state, (b) is a schematic perspective view showing the packaged object of (a) excluded, (c). ) Is a perspective view showing a device of the package of (a) (a device formed by the packaging device according to Japanese Patent Application Laid-Open No. 2018-16390). It is a figure which shows the structure of the packaging | It is a partially enlarged view of (a) which shows the structure of the downstream part of the top seal device, the tail seal device, and the transport device of the front packaging device shown in. (A) is an arrow view of IIIa-IIIa of FIG. 2 (a), and (b) is an arrow view of IIIb-IIIb of FIG. 2 (a). (A) is an IVa-IVa arrow view of FIG. 2A showing the gripping device, wrinkle removing device, tail sealing device and top sealing device of the packaging device shown in FIG. 2, and FIG. 2B is the gripping device and wrinkle removing. FIG. 5 is an arrow view of IVb-IVb of FIG. 2B showing a state of the device, the tail seal device, and the top seal device during operation. It is explanatory drawing which shows the arrangement structure of the heater of the sealing means and the cutting apparatus shown in FIG. 2 is a block diagram showing the entire command system of the control device of the front packaging device of FIGS. 2 to 5. (A) is an enlarged view of FIG. 2 (b), and (b) is an arrow view of AA of (a). It is an enlarged view of the main part of FIG. 7B which shows the state at the time of operation of the wrinkle removing device. It is an enlarged view of the main part of FIG. 7B which shows the state at the time of operation of the wrinkle removal guide. FIG. 7 is a view taken along the line A of FIG. 7A showing a state in which the wrinkle removing device and the wrinkle removing guide of FIG. 7B are closed. It is a substantially whole plan view of the packaging apparatus (the present packaging apparatus) which concerns on this invention. (A) is a schematic side view of the packaging device shown in FIG. 11, (b) is a schematic plan view of a main part showing a configuration omitted in FIG. 11, and (c) is a partially cutaway schematic front view of (b). (A) is a schematic front view of the packaging device shown in FIG. 11, and (b) and (c) are schematic front views of the packaging device of FIG. 11 showing an operating state of the transfer device of (a). (A) to (g) are schematic front views of the main parts showing each process of packaging on the transfer device of FIG. (A) to (c) are schematic plan views of the package in each step shown in FIG. 14, which depicts the moving direction by the transfer device as left and right, and (d) to (f) are (a) to (c), respectively. ) Is a schematic side view. (A) and (d) are schematic plan views showing the steps following (c) and (f) in FIG. 15, (b) is a schematic side view of (a), and (c) is an abbreviation of (a). It is a front view. (A) is a front view showing an embodiment of the package according to the present invention, (b) is a rear view of (a), (c) is a left side view of (a), and (d) is (a). Is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (A) is an explanatory diagram of the completed package of the present invention shown in FIGS. 1 (a) and 1 (b) and FIG. 17, and (b) is an explanatory diagram showing the operation thereof.

(Package A)
The package A (finished product) according to the embodiment of the present invention is a hollow substantially hexahedron having a front surface portion 2aa, a rear surface portion 2bb, an upper surface portion 2cc, a lower surface portion 2dd, a left side surface portion 2ee, and a right side surface portion 2ff. It is composed of an object to be packaged 1 housed in the hollow internal space of the hexahedron (FIGS. 1 (a) and 1 (b) and FIG. 17).
In the package A, one substantially rectangular plastic film sheet 3 is partially folded to form the hexahedron.
In this example, the object to be packaged 1 is a sandwich having a substantially rectangular parallelepiped shape. However, the packaged item 1 can be used as Western confectionery such as cream puffs containing eclairs, Japanese confectionery and other confectionery, breads including cooked bread such as yakisoba bread and sandwiches, fruits and other foods, as well as electronic parts and watches. , Ornaments and other personal belongings.
Further, in this embodiment, a transparent film sheet is used as the film sheet 3. The film sheet 3 may be a translucent film sheet, an opaque film sheet, or a colored film sheet.
As shown by diagonal lines in FIGS. 1A and 1B and thick lines in FIG. 18, the package A includes a front upper thick portion To and a rear upper thick portion Ta.

The front upper thick portion To is a streak-like portion arranged so as to continuously extend from the front surface portion 2aa to the upper surface portion 2cc of the package A, and the rear upper thick portion Ta is a rear surface portion 2bb to the upper surface portion 2cc. It is a streak-like part arranged so as to extend continuously toward. Both the front upper thick portion To and the rear upper thick portion Ta are portions having a larger wall thickness than the other portions of the film sheet 3.
In this example, each of the front upper thick portion To and the rear upper thick portion Ta is composed of a top seal To and a tail seal Ta, which will be described later, which partially seal the film sheet 3.
Further, the front upper thick portion To is folded on the surfaces of the front surface portion 2aa and the upper surface portion 2cc, and the rear upper thick portion Ta is folded on the surfaces of the rear surface portion 2bb and the upper surface portion 2cc.

17 (a) to 17 (f) show six views of the finished product of the package A, and FIGS. 1 (A) and 18 (B) are mainly the front upper thick portion To of the finished product of the package A. It shows the arrangement of the rear upper thick portion Ta. In FIGS. 1 (a) and 1 (b) and FIG. 18, other configurations of the package A other than the front upper thick portion To and the rear upper thick portion Ta are omitted.
Further, in FIGS. 2 (a) and 2 (b) and 7 (a), the transport direction of the package A in the packaging device B is from right to left in the figure, the left side in the figure is in front of the package A, and the right side in the figure is packaged. Behind body A. On the other hand, in FIGS. 15 (a), (b), (c) and 16 (a), (d), the right side of the figure is the front side of the package A, and the left side of the figure is the back side of the package A. .. In FIGS. 15 (a), (b), (c) and 16 (a), (d), the moving direction of the package A by the transfer device 52, which will be described later, is from the bottom to the top of the figure.

In the side view of the package A, the front upper thick portion To constitutes a substantially L-shaped angle that bends at an angle formed by the front portion 2aa and the upper surface portion 2cc, and the rear upper thick portion Ta constitutes the rear surface portion 2bb. A substantially L-shaped angle that bends at an angle formed by the upper surface portion 2cc and the upper surface portion 2cc is formed (FIG. 18A).
That is, the front upper thick portion To is composed of a front arrangement portion To1 arranged on the front surface portion 2aa of the package A and a first upper surface arrangement portion To2 arranged on the upper surface portion 2cc of the package A. It is a muscle that bends in an L shape.
Further, the rear upper thick portion Ta is composed of a rear surface arrangement portion Ta1 arranged on the rear surface portion 2bb of the package A and a second upper surface arrangement portion Ta2 arranged on the upper surface portion 2cc of the package A. It is a muscle that bends in an L shape.

The package A will be described more specifically.
In this example, the package A includes one rectangular film sheet 3 and a packaged object 1 mounted on the film sheet 3, and the surface on which the packaged object 1 is placed is the film sheet 3. As the inner surface 3i, the film sheet 3 directs the left and right side end portions 3e protruding from the packaged object 1 to the left and right toward the upper side of the packaged object 1 (FIG. 1 (c)). The left and right left and right end portions 3e are the left and right sides of a rectangular film sheet.

The package A has the above-mentioned top seal To that seals the left and right inner surfaces 3e of the film sheet 3 in a state of being overlapped in front of the object to be packaged 1, and the left and right film sheets 3 behind the object to be packaged 1. It is provided with the above-mentioned tail seal Ta that seals the inner surface 3e in a superposed state.
As shown in FIG. 1 (c), the top seal To extends up and down in front of the packaged object 1, the tail seal extends up and down behind the packaged object 1, and the film sheet 3 on which the packaged object 1 is placed is placed. The bottom portion (lower surface portion 2dd) side is provided with a gusset G between the top seal To and the packaged object 1 and between the tail seal Ta and the packaged object 1, respectively.
Further, the package A shown in FIG. 1 (c) is a device, and the upper part is opened as an opening 4. As shown in FIG. 1 (c), in the state of the device, the height of the package A, that is, the vertical width of the top seal To and the tail seal Ta is larger than that of the packaged object 1.

As shown in FIGS. 15 (a) and 15 (b) and 17 (e) and (f), the finished package A has a top as a crease (front crease 4aa) between the top seal To and the object to be packaged 1. The front folding portion 4a for folding the seal To toward the packaged object 1 side of the package A is provided, and the tail seal Ta is used as a crease (rear fold 4bb) between the tail seal Ta and the packaged object 1 as the package body 1. A post-folding portion 4b that is folded toward the packaged object 1 side is provided. The portion of the front folded portion 4a located above the packaged object 1 is folded rearward, and the upper end side of the top seal To is arranged directly above the packaged object 1 as the first upper surface arranging portion To2. It constitutes 4c. The portion of the rear-folded portion 4b above the packaged object 1 is folded forward, and the upper end side of the tail seal Ta is arranged directly above the packaged object 1 as the second upper surface arrangement portion Ta2. do.
Directly above the packaged object 1, the first upper surface arrangement portion To2 is located in front of the second upper surface arrangement portion Ta2, and in this example, the first upper surface arrangement portion To2 does not overlap with the second upper surface arrangement portion Ta2 (FIG. 15 (c) (f), FIGS. 16 (a) (d) and 17 (e)). However, it can be implemented even if at least a part of the first upper surface arrangement portion To2 overlaps with the second upper surface arrangement portion Ta2.

The left and right end portions 3e of the film sheet located above the packaged object 1 on the left and right sides of the packaged object 1 are provided as the upper left overlapping portion 4e and the upper right overlapping portion 4f, respectively. One of the upper left overlapping portion 4e and the upper right overlapping portion 4f overlaps the front middle overlapping portion 4c and the rear middle overlapping portion 4d, and the other one of the upper left overlapping portion 4e and the upper right overlapping portion 4f is the upper left overlapping portion 4e and the upper right. It overlaps with the one of the overlapping portions 4f.
The package A includes a fixing portion 4g for fixing at least the overlapping upper left overlapping portions 4e to the upper right overlapping portion 4f. The fixing portion 4g can be a heat-sealing portion composed of a heat-sealing portion or a hot-melt portion provided with a hot-melt adhesive. In this example, the fixing portion 4g is the heat sealing portion.
Further, in this example, the upper left overlapping portion 4e directly overlaps the front middle overlapping portion 4c and the rear middle overlapping portion 4d, and the upper right overlapping portion 4f overlaps the upper left overlapping portion 4e. However, contrary to what is shown, the upper right overlapping portion 4f may be directly overlapped on the front middle overlapping portion 4c and the rear middle overlapping portion 4d, and the upper left overlapping portion 4e may be overlapped on the upper right overlapping portion 4f.

This package A does not have a center seal like a comb like the package of Japanese Patent Application Laid-Open No. 2018-16390, but has a top surface portion 2bb formed substantially flat, and the package A is as shown in FIG. 18 (b). It is easy to stack each other vertically.
The front upper thick portion To and the rear upper thick portion Ta, which are thicker than the other parts of the film sheet 3 by the seal, are provided on the package A as an angle, and the front surface whose position is stable in the gusset G. As shown in FIG. 18B, the packages A are vertically stacked by supporting the first upper surface arrangement portion To2 and the second upper surface arrangement portion Ta2 integrally with the arrangement portion To1 and the rear surface arrangement portion Ta1. Even if this is done, the lower package A that receives the load of the upper package A is less likely to be deformed than the package that does not have the front upper thick portion To and the rear upper thick portion Ta.

In this example, the device of the package A shown in FIG. 1 (c) is processed to obtain the finished product of the package A according to the present invention.
The above-mentioned device can be formed by the packaging device B shown in FIGS. 2 to 10 (hereinafter, referred to as a front packaging device B if necessary). By processing the formed device with the packaging device 100 according to the present invention shown in FIGS. 11 to 14 (hereinafter, referred to as the present packaging device 100 as necessary), the above-mentioned package A according to the present invention can be obtained. Can be formed.
Further, as described above, the top seal To and the tail seal Ta, which extend in almost the entire vertical direction of the device formed by the front packaging device B, are formed on the front upper thick portion To and the rear upper thick portion, respectively. By using it as Ta, in the finished product of the package A, the front arrangement portion To1 can be arranged from the upper end to the lower end of the front portion 2aa of the package A, and from the upper end to the lower end of the rear surface portion 2bb of the package A. The rear surface arrangement portion Ta1 can be arranged across. Therefore, the front surface arrangement portion To1 and the rear surface arrangement portion Ta1 with the feet attached to the ground as described above, which are lined with the gusset G, support the first upper surface arrangement portion To2 and the second upper surface arrangement portion Ta2. This enhances the holding capacity of the shape of the upper surface portion 2cc of the finished product of the package A.
In this example, the present packaging device 100 can be attached to the front packaging device and used as an optional item of the front packaging device.
The packaging device 100 will be described in detail later.

In this example, in the package A as a device, as shown in FIGS. 3A and 3B, the packaged object 1 is placed in the central portion of the film sheet 3 in the width direction. From below, the bottom portion 1b of the packaged object 1 and the left and right side portions 1s are covered with the film sheet 3.
Further, as shown in FIGS. 3 (b) and 1 (c), the package A is an upper portion of the object to be packaged 1 at both ends (side ends 3e) in the width direction of the film sheet 3. Is lifted upward and is conveyed in a state where the inner surfaces 3e at both ends are overlapped with each other. The overlapped both ends are referred to as a mating portion Ss as necessary (FIG. 7A).
When the packaging device according to Japanese Patent Application Laid-Open No. 2018-16390 is adopted as the packaging device B, the mating portion Ss can be a center seal by being sealed, but the center seal is not formed in the present invention.

As shown in FIG. 1 (c), the package A is sealed at the front portion of the packaged object 1 to form a top seal To, and is sealed at the rear portion of the packaged object 1 to form a tail seal. Ta is formed, and the whole is covered with the film sheet 3. Further, as described above, the gusset G is formed at the bottom of the rear portion of the portion where the top seal To is formed, and the gusset G is formed at the bottom of the front portion of the portion where the tail seal is formed.

(Front packaging device B)
As shown in FIG. 2A, the packaging device B, that is, the pre-packaging device, forms a transport device 10, a film sheet supply device 11 for supplying a sheet-shaped film, and the sheet-shaped film in a U-shape. A former, a stacking device 13 for superimposing both ends of a sheet-shaped film, a top sealing device 14, a tail sealing device 15, a first gusset forming device 16, and a second gusset forming device 17. is doing.

The transport device 10 is configured to transport the packaged object 1 from the upstream side to the downstream side in synchronization with the supply speed of the film sheet 3 of the film sheet supply device 11.
In this example, the transport device 10 includes a transport conveyor 10a which is a first transport means and a carry-out conveyor 10b which is a second transport means arranged on the downstream side thereof.
The strip-shaped film sheet 3 unwound from the film supply drum 11b of the film sheet supply device 11 is configured to be supplied on the transfer surface 10f of the transfer conveyor 10a and the carry-out conveyor 10b.
In this embodiment, a belt conveyor is adopted as the transport conveyor 10a and the carry-out conveyor 10b.
The transport conveyor 10a is configured such that the downstream end (head pulley) can be expanded and contracted in the transport direction (see the direction indicated by the arrow X in FIG. 2A). As a result, during the sealing operation for forming the top seal To and the tail seal Ta, which will be described later, the downstream end of the conveyor 10a retracts in the counter-conveying direction, and the top seal device 14 and the tail shown in FIG. 4 (b). When the sealing means 14a and 15a of the sealing device 15 and the wrinkle removing devices 18 and 18 provided corresponding thereto are to be positioned in the operating position, they do not physically interfere with the conveyor 10a. It is configured in. That is, as shown in FIG. 2B, the downstream end of the transport conveyor 10a contracts upstream to form a gap Sf with the carry-out conveyor 10b, so that the interference is prevented. ing.

As shown in FIG. 2A, the former 12 is provided at the upstream end of the conveyor 10a, and the former 12 reverses the supply direction (movement direction) of the supplied film sheet 3. As shown in FIG. 3A, the film sheet 3 is bent in a U shape, and the central portion of the film sheet 3 in the width direction substantially abuts on the transport surface 10f of the conveyor 10a and both sides thereof. Form a U-shaped state in which the portion of is raised upward.
Then, as shown in FIGS. 2 (a) and 3 (a), the object to be packaged is located at the central portion of the film sheet 3 in the width direction by a worker's hand or by a supply device (not shown). 1 is placed.

As shown in FIG. 2A, a drive roller pair 11c that feeds the film sheet 3 downstream is arranged above the central portion of the transport conveyor 10a in the transport direction, and is located downstream thereof. Is arranged with the stacking device 13 having both ends of the film sheet 3 in the width direction stacked as a mating portion Ss. The drive roller pair 11c and the stacking device 13 are configured to feed the film sheet 3 to the downstream side at the same speed as the supply speed.
The stacking device 13 includes a pair of left and right rollers 13c having a built-in heater as a center sealing device 13 in the packaging device according to Japanese Patent Application Laid-Open No. 2018-16390, and seals the film sheet 3 with both end portions overlapped. It is configured to (form the center seal Ss).
However, in the package A of the present invention, the center seal Ss is unnecessary, and even if the center seal device 13 is used as the stacking device 13, the heater does not generate heat.
That is, in the stacking device 13, the left and right end portions (side end portions 3e) of the U-shaped film sheet 3 as shown in FIG. 3A are shown in FIG. 3B as the mating portion Ss. Hold it in a superposed state. Then, the packaged object 1 is wrapped inside the tubular film sheet 3 (see FIG. 3B).
As shown in FIGS. 2A and 3A, the dimensions of the mating portion Ss in the height direction are adjusted upstream of the stacking device 13 (upstream of the drive roller pair 11c). The adjuster 20 is arranged so that the dimension can be adjusted by the adjustment knob 20a at the upper end portion.

As shown in FIG. 2, between the transfer conveyor 10a and the carry-out conveyor 10b, the top seal device 14, the tail seal device 15, the first gusset forming device 16 and the second gusset forming device 17. The wrinkle removing devices 18 and 18 and the cutting device Cu are provided so as to be able to retreat and enter.
As shown in FIG. 2, the top sealing device 14, the tail sealing device 15, and the wrinkle removing devices 18 and 18 are substantially perpendicular to the transport surface 10f of the conveyor 10a in a side view (in the case of this embodiment). Is arranged on a common frame 19 so that the inclination angle is about 5 degrees upward and is inclined so as to deviate to the downstream side) so that the longitudinal directions of the seals coincide with each other. The film sheet 3 formed in the above is arranged so as to be capable of sealing operation (sealing operation for forming the top seal To and the tail seal Ta) with the packaged object 1 inside. The inclination angle may be about 0 to 7 degrees depending on the length of the packaged object 1 and the thickness of the film sheet 3. Specifically, in the case of the object to be packaged 1 having a short length in the transport direction such as a sandwich or a rice ball, the inclination angle is approximately 0 degrees and good packaging can be performed. On the other hand, in the case of the packaged object 1 having a long length, it is preferable to incline it as described above.
Then, as shown in FIGS. 4A and 4B, the top sealing device 14 and the tail sealing device 15 are arranged so as to be capable of pinching operation (see arrow Y in FIG. 4A). It has a pair of left and right sealing means 14a and 15a. The lower end of the sealing means 14a and the sealing means 15a is configured to be capable of sandwiching the frame 19 toward the center of the film sheet 3 (see arrow Y), and is sandwiched between the sealing means 14a and the sealing means 15a. The top seal To and the tail seal Ta can be applied to the tubular film sheet 3.

Further, as described above, when the top seal To and the tail seal Ta are formed, the space between the top seal To and the tail seal Ta portion is cut by the cutting device Cu, and each packaged object 1 (packaging body A) is cut. It is configured to separate what has been packaged. As a configuration of such a cutting device Cu, for example, as shown in FIG. 5, the sealing means 14a, the sealing means 15a, and a cutting heater portion provided between them are combined into one block 28. It can be realized by arranging it on the plane (surface) of. As the cutting means of the cutting device Cu, another means, for example, a cutter (cutting tool) can be used instead of the cutting heater.
Further, when the top seal To and the tail seal Ta are formed (front), as shown in FIG. 2B, the first gussets arranged on both front and rear sides of the frame 19 in the transport direction are formed. The gusset claws 16a and 17a of the apparatus 16 and the second gusset forming apparatus 17 are located above the transport surface 10f and have only the dimensions indicated by the arrow R (see FIG. 4A) (in this example, from the transport surface 10f). By ascending from below to a height of about half of the object to be packaged 1 and pushing up the bottom surface of the film sheet 3, the front end of the package A is shown in FIGS. 1 (a) and 1 (b). It is configured to form the gusset G at the bottom of the portion and the rear end portion.
Further, before each seal of the top seal To and the tail seal Ta is formed, the wrinkle removing device 18 provided with the pair of left and right levers 18a shown in FIG. 4 operates to enable rotation of the levers 18a. The rotation of the arranged wrinkle removing belt 18c is configured to remove wrinkles that are likely to occur on the film sheet 3 at the portion to be sealed.
In the case of this example, the lever 18a is configured to be capable of "pinching operation" in which the lower end portion swings around the support shaft 18b at the upper end portion and the lower end portion swings to sandwich the film sheet 3 from both sides. .. Then, in the state of being sandwiched as described above, the wrinkles of the film sheet 3 sandwiched between the wrinkles are removed as much as possible by the rotational operation of the wrinkle removing belt 18c that circulates around the left and right levers 18a. There is.
The top sealing device 14, the tail sealing device 15, and the cutting device Cu are configured such that the one block 28 performs a "pinching operation (see FIG. 4A)" as described above. Alternatively, the block 28 may be configured to abut from both sides to seal and cut by sliding in the horizontal direction. However, in terms of the ability to remove wrinkles, the "pinching operation" having the configuration shown in FIGS. 4 (a) and 4 (b) is preferable in that it can be performed better.

Each of the blocks 28 is attached to the frame 19 (FIGS. 2 (a) and 4 (a)) via the arm 29 (FIG. 7 (b)).
A pair of arms 29 are provided on the left and right sides of the frame 19 with the transport direction of the packaged object 1 as the front-rear direction. The front end (lower end) side of the arm 29 is located on the left and right sides of the film sheet 3 which is curved in a U shape with the object to be packaged 1 inside and whose upper end side is the mating portion Ss.
The base end (upper end) side of each of the paired arms 29 is axially fixed to the frame 19 (FIGS. 2 and 4). Each of the arms 29 rotates about the base end side.
Due to the rotation of the arm 29, the left and right blocks 28 form a tail seal Ta behind the preceding packaged object 1 with respect to the film sheet 3 by sandwiching the film sheet 3 from the left and right sides of the film sheet 3, and the subsequent cover. A top seal To is formed in front of the package 1, and the film sheet 3 is cut between the tail seal Ta and the top seal To (FIGS. 4 and 5).
In this example, the block 28 is provided to each of the facing portions of both arms 29 via a support member 30 (FIGS. 7 (b) and 10).
Although not shown, the arm 29 receives a driving force from a well-known power source such as a motor, a power cylinder, or another actuator to open and close as described above.

Here, the wrinkle removing device 18 will be described in more detail.
In this example, each of the pair of wrinkle removing devices 18 includes the lever 18a, the lever driving unit 18f, at least two rollers 18d and 18e, the wrinkle removing belt 18c, and the roller driving unit (not shown). (FIGS. 7 (b) and 8). Hereinafter, the wrinkle removing belt 18c is simply referred to as a belt 18c.
The upper end of the elongated lever 18 is pivotally fixed to the frame 19 by the support shaft 18b. The lever 18a can rotate about the support shaft 18b with respect to the frame 19. The pairing levers 18a open and close between the tips (lower ends) of the levers 18a by the rotation around the support shaft 18b. One of the rollers 18d and 18e is pivotally stopped on the upper end side of the lever 18a, and the other one of the rollers 18d and 18e is pivotally stopped on the lower end side of the lever 18b. The belt 18c is hung between both rollers 18d and 18e.
The lever 18a receives a driving force from the lever driving unit 18f and rotates around the support shaft 18a.
The lever drive unit 18f includes a well-known power source such as a motor, a power cylinder or other actuator, and a power transmission mechanism such as a gear or a power transmission belt and a pulley. In this example, the lever drive unit 18f is provided with an electric cylinder or a fluid pressure cylinder.
The lever 18a is an arm, assuming that the lever drive unit 18f (power source) is independent of the power source of the arm, or power is supplied from the same power source by different power transmission means. It suffices that the opening / closing operation can be performed independently of the opening / closing of 29.

One of the rollers 18d and 18e is a drive roller, and the belt 18c circulates due to the rotation of the drive roller. In this example, the roller 18d on the upper end side of the lever 18a is the driving roller, and the roller 18e on the lower end side of the lever 18a is a driven roller that rotates following the circulating movement of the belt 18c.
The roller 18d, which is a driving roller, rotates by receiving a driving force from the roller driving unit.
The roller drive unit and the roller 18d correspond to the "drive unit" in the claims.
The roller drive unit includes a motor that serves as a drive source, and if necessary, includes a gear that transmits a driving force from the motor, or a power transmission unit such as a drive belt or a pulley.
In the example shown in FIG. 4, both levers 18a share the support shaft 18b and are axially fixed to the frame 19, whereas in the examples shown in FIGS. 7, 8 and 10, both levers 18a are respectively. It is axially fixed to the frame 19 by a separate and independent support shaft 18b. That is, in the examples shown in FIGS. 7, 8 and 10, the pair of levers 18a are pivotally fixed to the frame 19 by the support shafts 18b arranged on the left and right above the top seal Ss. Further, the pair of levers 18a may be axially fixed to the frame 19 by each of the separate support shafts 18b arranged coaxially.
In FIGS. 4, 7, 8 and 10, the support shaft 18b is hidden by the roller 18d.

Both belts 18c come into contact with the outer surface of the U-shaped film sheet 3 when the levers 18a paired with each other are closed by the opening and closing. The section of the annular belt 3 facing the film sheet 3 from the lever 18a becomes a portion that comes into contact with the film sheet 3 by opening and closing the lever 18a. In this section, the belt 18c moves from above to below (in the direction of arrow m in FIG. 8).
Due to the movement of the belt 18c, the section of the belt 18c continuously follows the outer surface of the U-shaped film sheet 3 from the mating portion Ss side to the lower side to smooth out wrinkles.
In this example, the length of the lever 18a is larger than the vertical width of the film sheet 3 held by the stacking device 13, and the upper end of the lever 18a is larger than the upper end of the (matching portion Ss) of the film sheet 3 to be conveyed. It is located above, and the lower end of the lever 18b is located below the bottom portion (lower surface portion 2dd) of the film sheet 3 which is curved with the packaged object 1 inside (FIG. 7 (b)).
In this example, a pair of wrinkle removing devices 18 are provided in front of and behind the block 28 (upstream side and downstream side of the block 28 in the transport direction of the packaged object 1) (FIG. 2A). Hereinafter, if necessary, the pair of left and right wrinkle removing devices 18 arranged on the upstream side of the transport of the packaged object 1 are arranged on the upstream side wrinkle removing device 18 and the downstream side of the transport of the packaged object 1. Each pair of left and right wrinkle removing devices 18 is referred to as a downstream wrinkle removing device 18.

As described above, when each of the top seal To and the tail seal Ta is operated, when the gusset G is formed, and when the wrinkle removing operation is performed, so as not to interfere with these operations. The downstream end (head pulley portion) of the conveyor 10a contracts (moves) upstream, and a gap Sf is formed between the downstream end of the conveyor 10a and the upstream end of the carry-out conveyor 10b. When the gap Sf is formed in this way, the conveyor 10a is configured to stop the conveyor operation.

By the way, as shown in FIG. 2, the carry-out conveyor 10b tilts around the swing shaft 10d at the upstream end as shown by the arrow Rr during the sealing operation of the top seal To and the tail seal Ta. It is configured to swing (tilt) by a predetermined angle Rr (for example, about 15 degrees at the maximum in this example) by expanding and contracting the cylinder 10c (see FIG. 6). When the film sheet 3 is thick, it swings by about 15 degrees, and when the package A has a long length (for example, yakisoba bread), it swings by about 15 degrees. This rocking operation is performed in order to provide a dimensional allowance to the bottom of the package A so that the above-mentioned gusset G can be formed smoothly. The predetermined angle Rr can be set to about 0 to 20 degrees depending on the length of the object to be packaged 1, the thickness of the film sheet 3, and the like. Specifically, in the case of an object to be packaged 1 such as a sandwich or a rice ball, good packaging can be achieved with the predetermined angle Rr being approximately 0 degrees.
Further, as in this example, the inclination angle of the top sealing device 14 and the tail sealing device 15 is set to about 1/2 to 1/3 of the swinging predetermined angle of the carry-out conveyor 10b. This is a preferable configuration in that the length of the upper part of the package A can be formed longer than the length of the bottom, that is, the dimensions of the upper part of the package A can be made longer. That is, a spatial space is formed on the upper part of the package A.
The unloading conveyor 10b is configured to stop the unloading operation during the swinging operation.
Even when the sandwich is packaged by the front packaging device B, the angle Rr is not limited to 0 degrees, and depending on the dimensions of the sandwich, it may be necessary to swing (tilt) the carry-out conveyor 10b by a tilt cylinder 10c or the like. be. When the depth (height) of the package A, which is usually a device, is 100 mm or less, the above-mentioned swing is unnecessary, but when the world depth exceeds 100 mm, the above-mentioned swing is preferable.

Further, as shown in FIGS. 2 (a) and 2 (b) or 4 (a) and 4 (b), the carry-out conveyor 10b swings (tilts) about the swing shaft 10d as shown by an arrow Rr. ), The gripping devices 21 and 22 for gripping the center seal Ss portion are provided adjacent to the upstream side and the downstream side of the frame 19 so that the package A is positioned. .. As shown in FIGS. 4A and 4B, each of the gripping devices 21 and 22 is a pair of gripping arms 21b and 22b that swing around the upper pivot shaft 21a (22a). It is configured to sandwich the mating portion Ss of the film sheet 3 from the left and right sides.
In the example shown in FIGS. 4A and 4B, the pair of gripping arms 21b of the upstream gripping device 21 each share one pivot shaft 21a and the pair of downstream gripping devices 22. Each of the gripping arms 22b also shares the pivot shaft 22a. The pair of gripping arms 21b of the upstream gripping device 21 are pivotally supported by separate pivot shafts 21a arranged coaxially, and the pair of gripping arms 22b of the downstream gripping device 22 are supported. Each of these may be pivotally supported by separate pivot shafts 22a arranged coaxially.

The gripping devices 21 and 22 include a driving device 27 for driving the gripping arms 21b and 22b (FIGS. 7 (b), 9 and 10). The drive device 27 includes a well-known power source such as a motor, a power cylinder, or an actuator, and transmits the driving force from the power source to the gripping arms 21b and 22b. In this example, the drive device 27 comprises an electric cylinder or a fluid pressure cylinder. The drive device of the gripping devices 21 and 22 can open and close the gripping arms 21b and 22b which are paired independently of the opening and closing operation of the arm 29 and the wrinkle removing device 18.
More specifically, one gripping device 21 is arranged adjacent to the block 28 in the transport direction of the packaged object 1 on the upstream side of the upstream wrinkle removing device 18, and one gripping device 21 is arranged on the downstream side of the downstream wrinkle removing device 18. The gripping device 22 of the above is arranged. That is, a pair of left and right gripping arms 21b are arranged adjacent to the block 28 in the transport direction of the packaged object 1 on the upstream side of the upstream wrinkle removing device 18, and to the downstream side on the downstream side of the downstream wrinkle removing device 18. A pair of left and right gripping arms 22b are arranged.
In FIG. 4, the wrinkle removing guide 26 described below is omitted in order to avoid complication of the drawing.
Further, in the examples shown in FIGS. 7, 9 and 10, each of the pair of gripping arms 21b of the upstream gripping device 21 is formed by separate pivot shafts 21a arranged on the left and right upper sides of the mating portion Ss. Each of the pair of gripping arms 22b of the gripping device 22 on the downstream side is also pivotally supported by separate pivot shafts 22a arranged on the left and right upper sides of the mating portion Ss.

The wrinkle removing guides 26 are provided on the gripping arms 21b and 22b of the gripping devices 21 and 22 respectively. That is, a wrinkle removing guide 26 is provided on each of the left and right holding arms 21b of the upstream gripping device 21, and a wrinkle removing guide 26 is also provided on each of the left and right holding arms 22b of the downstream gripping device 22. (FIG. 7 (b), FIG. 9 and FIG. 10).
Each of the left and right paired wrinkle removing guides 26 provided on the left and right holding arms 21b and 22b extends downward from the respective gripping arms 21b and 22b and operates integrally with the opening and closing of the gripping arms 21b and 22b. Then, the portion below the mating portion Ss of the film sheet 3 is pressed.
As described above, the left and right wrinkle removing guides 26 are opened and closed by opening and closing the holding arms 21b and 22b, respectively. That is, when the holding arms 21b and 22b are opened and closed, the left and right wrinkle removing guides 26 approach each other and press the left and right outer surfaces of the film sheet 3 which are bent from the left and right sides of the film sheet 3. By pressing the left and right outer surfaces of the film sheet 3 with the wrinkle removing guide 26, prior to the wrinkle removing operation of the two pairs of wrinkle removing devices 18, between the preceding packaged object 1 and the subsequent packaged object 1. The left and right widths of the film sheet 3 are narrowed.
Further, each of the paired wrinkle removing guides 26 is provided with a curved portion 26a that curves so as to gradually widen the distance from each other toward the lower end. Due to the formation of the curved portion 26a, when the paired wrinkle removing guides 26 are brought close to each other, the film sheet 3 is sequentially pressed from above to below, and from above to below by the belt 18c of the wrinkle removing device 18. The operation of smoothing out wrinkles can be performed more smoothly.
In this example, the wrinkle removing guide 26 adopts a rod having a diameter of 3 mm or a plate having a thickness of 2 mm and a width (height) of 50 mm. However, this is the form, dimensions, and examples of the wrinkle removing guide 26, and may be changed according to the change in the dimensions of the film sheet 3.

The motor for driving the packaging device B (for example, an inverter type motor or the like), each actuator such as a pneumatic cylinder, and the plurality of detection devices 31, 32, 33 provided at each position are the blocks of FIG. As shown in the figure, it is connected to the control device 25 of the packaging device B by a signal line, and is configured to receive a detection signal from the detection device and emit a predetermined control signal to perform a predetermined packaging.

Hereinafter, the packaging operation (packaging method) of the packaging device B will be described together with the content of control by the control device 25 of the packaging device B.
It should be noted that the numbers of steps 1 to 9 indicating the packaging method are not the reference numerals of the members shown in the drawings, but are used only for identifying the steps described above in the specification (they are irrelevant to the reference numerals shown in the drawings).

When the start switch of the packaging device B is turned on, the transfer conveyor 10a, the carry-out conveyor 10b, the film sheet supply device 11, the drive roller pair 11c and the stacking device 13, the top seal device 14, the tail seal device 15, and the wrinkle removal device are turned on. Each device such as 18 is in the operating state (standby state) (step 1).
In this state, when the object to be packaged 1 is placed on the film sheet 3 on the former, the detection device 31 (FIG. 6) provided near the position of the object to be packaged places the object to be packaged 1. Is detected (step 2).
Upon such detection, the conveyor 10a, the film sheet supply device 11, the drive roller pair 11c, and the center seal device 13 operate, and the film sheet 3 and the packaged object 1 on the film sheet 3 are sent to the downstream side. Meanwhile, the left and right end portions (side end portions 3e) of the film sheet 3 are overlapped by the stacking device 13 and temporarily held as the mating portion Ss (step 3).

Then, when the packaged object 1 is transported to a predetermined position near the downstream end of the transport conveyor 10a, the detection device 32 provided in the vicinity of the predetermined position arrives at the predetermined position. Is detected, the conveyor 10a, the film sheet supply device 11, the drive roller pair 11c, and the stacking device 13 are stopped (step 4).
Next, the control device 25 contracts the downstream end of the transport conveyor 10a to form a gap Sf (see FIG. 2B) with the carry-out conveyor 10b (step 5).
When the detection device 33 arranged in the vicinity of the gap Sf detects that the gap Sf is formed, the gripping devices 21 and 22 subsequently grip the mating portion Ss of the packaged object 1 at the predetermined position. Then, the carry-out conveyor 10b swings (tilts) in the direction of the arrow Rr about the swing shaft 10d at the upstream end as shown in FIG. 2B, if necessary (step 6).

In the state of step 6, the gusset claws 16a and 17a of the first gusset forming device 16 and the second gusset forming device 17 from below in the front portion and the rear portion of the packaged object 1 are from the transport surface 10f. The film sheet 3 is lifted by increasing the distance indicated by the arrow R (see FIG. 4A) to the upper position, and a gusset G is formed on the film sheet 3 at a portion close to the front and back of the packaged object 1 (step 7). ).
Further, in the state of step 7, the wrinkle removing device 18 operates to remove wrinkles that are likely to occur on the film sheet 3 in the vicinity of the portion where the top seal To and the tail seal Ta are to be attempted (step 8).

The above step 8 will be described in more detail.
From step 1 to step 7, each device of the sealing means 14a of the top sealing device 14, the sealing means 15a of the tail sealing device 15, that is, the block 28, the wrinkle removing device 18, and the gripping devices 21 and 22 is in an operating state ( It is in a standby state). That is, from step 1 to step 7, the pair of arms 29, the pair of levers 18a of the wrinkle removing device 18, and the paired gripping arms 21b and 22b of the gripping devices 21 and 22 are open.
After or during the execution of step 7, in step 8, first, prior to the operation of the wrinkle removing device 18, both gripping devices 21 and 22 operate to pair the upstream gripping arm 21b and the paired downstream gripping arm 21b. The arms 22b are closed, and the mating portion Ss is sandwiched between the upstream gripping arms 21b and the downstream gripping arms 22b, respectively. In the two pairs of wrinkle-removing guides 26 accompanying the movement of the gripping arms 21b and 22b, the paired wrinkle-removing guides 26 approach each other and press the film sheet 3 from the left and right. Next, the film sheet 3 is sandwiched between the preceding packaged object 1 and the succeeding packaged object 1 with the levers 18a facing each other in the upstream and downstream wrinkle removing devices 18 closed from the left and right, and the belt 18c is circulated. Wrinkles of the film sheet 3 are removed at. It should be noted that step 8 may be executed together with the next step 9 in the state of step 6 before the execution of step 7.

After performing the step 8, the top sealing device 14 and the tail sealing device 15 operate. That is, as shown in FIG. 4B, each of the sealing means 14a and the sealing means 15a (see FIG. 5) of both devices 14 and 15 sandwiches the film sheet 3 from the left and right sides of the film sheet 3 (see FIG. 5). (See arrow Y) Form the top seal To and the tail seal Ta (step 9).
Further, along with the formation of the top seal To and the tail seal Ta, the heater of the cutting device Cu is activated, and the film sheet 3 that wraps the head package 1 on the carry-out conveyor 10b is the subsequent package. It is separated from the film sheet 3 that wraps 1, and as a result, the package A shown in FIG. 1 is completed.

That is, after the operation of the wrinkle removing device 18 in step 8, the arms 29 paired with each other in step 9 are closed, and the block 28 is placed between the preceding packaged object 1 and the subsequent packaged object 1 of the film sheet 3. By sandwiching from both the left and right sides, a tail seal Ta is formed behind the preceding object to be packaged 1, a top seal To is formed to the front of the subsequent object to be packaged 1, and the space between the two seals is cut to form the preceding packaged object 1. Complete the packaging body A for packaging.
In steps 8 to 9, as described above, the wrinkle removing guide 26, the lever 28a (belt 18c), and both the top sealing device 14 and the tail sealing device 15 (block 28) are closed in this order.
Since the packaged object 1 does not exist on the carry-out conveyor 10b at the beginning of packaging, only the top seal To in front of the packaged object 1 at the head is executed.

Next, the carry-out conveyor 10b returns from the oscillated (tilted) state to the horizontal state, the lever 18a of the wrinkle removing device 18, the first gusset forming device 16 and the second gusset forming device 17, and the transport conveyor. The downstream end of 10a returns to the original position (standby position), and the gripping devices 21 and 22 are released (step 10).
In this step 10, immediately after the pair of the blocks 28 (top sealing device 14 and tail sealing device 15) is opened, the pair of the lever 18a (belt 18c) and the wrinkle removing guide 26 (grasping arms 21b of the gripping devices 21 and 22) are opened. The pair of 22b) opens.

Then, the carry-out conveyor 10b, the transfer conveyor 10a, the film sheet supply device 11, the drive roller pair 11c, and the stacking device 13 operate again, and the package A on the carry-out conveyor 10b moves to the downstream side. It is carried out. Since the packaged object 1 does not exist on the carry-out conveyor 10b at the beginning of packaging, there is no such carry-out.
Further, along with the carry-out operation, the next packaged object 1 moves from the transfer conveyor 10a onto the carry-out conveyor 10b, repeats the series of operations described in steps 4 to 10 and repeats the series of operations described in steps 4 to 10 on the film sheet 3. The placed object 1 to be packaged is sequentially packaged in an inverted pillow form.

In the above, the center seal device 13 of the packaging device according to Japanese Patent Application Laid-Open No. 2018-16390 was used as the stacking device 13. In addition, instead of the center seal device 13, it is also possible to adopt a stacking device 13 that does not have a heat generating function and only superimposes the inner surfaces of the left and right end portions 3e of the film sheet 3. As the stacking device 13, a device having the same configuration as the center seal device 13 can be adopted except that it does not have a heat generating function (the above-mentioned heating heater).
Further, in the front packaging device B, in addition to adopting a separate stacking device as described above, the drive roller pair 11c of the film sheet supply device 11 may also serve as the stacking device, and the gripping devices 21 and 22 may be used. It may also serve as the stacking device.

In the above, even if the pair of left and right rollers 13c of the center seal device 13, the drive roller pair 11c of the film sheet supply device 11, and the gripping devices 21 and 22 are all independently constituting the stacking device 13. However, the above-mentioned device that is also used may be one that constitutes the stacking device 13 in cooperation with the center seal device 13.
In the above, whether the pair of left and right rollers 13c of the center seal device 13 is used as a stacking device or the pair of rollers is separately used as a dedicated stacking device, the drive roller pair 11c of the film sheet supply device 11 and the gripping device 21 , 22 as a stacking device, or when each device cooperates to form a stacking device as described above, at least the upper end portions of the film sheet 3 are sandwiched from the left and right in the vertical direction, and the left and right side portions of the film sheet 3 are sandwiched. It is assumed that the inner surfaces of the above are overlapped with each other as a mating portion Ss (FIG. 11 (b)). That is, in the case of a package having the center seal Ss, the inner surfaces of the left and right side portions of the film sheet 3 are overlapped with each other by the stacking device 13 at the position where the center seal Ss is provided.

(This packaging device 100)
As described above, by performing a series of steps 1 to 8 by the pre-packaging device B, the package A, which is the above-mentioned device, is obtained (FIG. 1 (c)).
Next, the packaging method of the present invention will be described together with the configuration of the present packaging apparatus 100 (FIGS. 11 to 14).
In the packaging method of the present invention, each step of carrying-in step s1, front-rear folding portion forming step s2, front-rear middle overlapping portion forming step s3, left-right upper overlapping portion forming step s4, fixing portion forming step s5, and cooling step s6 is sequentially performed. It is something to do. It should be noted that each reference numeral of s1 to s6 is used only in the present specification to identify each of the above steps, and is not used in the illustration.

The packaging device 100 includes a plurality of sensors (not shown) for detecting the position of the package A, an inlet conveyor 50, a transfer device 52 (moving device within the scope of patent claims), an outlet conveyor 59, and front and rear. It includes a folding device 60, a front-rear middle stacking device 70, a left-right top stacking device 80, a fixing device 90, and a control unit (not shown) that controls the operation of each of the devices (FIGS. 11 to 14). ..

As the sensor, an optical sensor including a pair of light emitting parts and a light receiving part is adopted. The sensor projects light such as infrared rays toward the light receiving unit at the light emitting unit, and notifies the control unit when the package A blocks the light, that is, when the light receiving is cut off at the light receiving unit. The control unit detects the arrival of the package A at a predetermined position by the notification. Further, the sensor may be one that causes the control unit to detect the arrival of the package A at a predetermined position by transmitting and receiving a sound such as an ultrasonic wave instead of light, or by detecting a change in radio waves or magnetism. Furthermore, a pressure-sensitive sensor can be adopted as the sensor. That is, the above sensor is used as a pressure-sensitive sensor laid at the passing point of the package A, and when the moved package A rides on the sensor, the sensor reacts to the weight of the package A and applies pressure to the control unit. It may be used as a notification.
Although not shown, each of the plurality of sensors is arranged at each passing point of the package A in the transport line, which is suitable for causing the control unit to sense the timing of operation of each of the devices.

(Delivery step s1)
In the carry-in step s1, the inlet conveyor 50 is a package A (device) formed by the front packaging device B, that is, a package A having an opening 4 above (FIGS. 1 (c) and 15 (a)). (D)) is moved from the front packaging device B toward the transfer device 52 (FIGS. 11 and 12 (a)). That is, the inlet conveyor 50 is a conveyor that moves the package A (device) from the carry-out conveyor 10b of the front packaging device B toward the transfer device 52.
On the other hand, the transfer device 52 receives the package A (device) transferred by the inlet conveyor 50 and further moves the package A toward the outlet conveyor 59. The transfer device 52 will be described in detail later.

As described above, the carry-out conveyor 10b is a belt conveyor in this example. Reference numeral 10h indicates a guide plate that guides the package A on the carry-out conveyor 10b and prevents the package A from falling off from the left and right sides of the carry-out conveyor 10b (omitted in FIG. 2). The guide plate 10h is a plate-shaped body arranged on the left and right of the package A on the transport conveyor 10b and extending along the transport direction of the carry-out conveyor 10b. The upstream side of the pair of guide plates 10h in the transport direction is provided with an inlet section 10k that gradually narrows the distance between the guide plates 10h toward the downstream side (FIG. 11). A pair of guide plates 10h are arranged substantially in parallel on the downstream side of the entrance section 10k.

In this example, the inlet conveyor 50 is configured by arranging a plurality of slip rollers 51 in a transport direction on a frame (not shown). Each slip roller 51 includes a core rod that is pivotally supported by the frame body and rotates on its axis by obtaining a driving force from a power source such as an electric motor, and a pipe fitted to the core rod. Although the pipe rotates by receiving a rotational force from the core rod, the pipe can slide around with respect to the core rod. By allowing the pipe to spin somewhat with respect to the core rod in this way, it is possible to softly transfer a delicate material that easily loses its shape.
By adopting the inlet conveyor 50 provided with the slip roller 51, it is possible to carry the package A, which easily loses its shape, from the upstream end to the downstream end of the inlet conveyor 50 by soft touch. For example, by adopting the slip roller 51, it is possible to prevent the package A from vigorously colliding with the end stopper 50c described later, and it is possible to prevent the package A from losing its shape due to contact with the end stopper 50c.
The inlet conveyor 50 can be implemented as a roller that is composed of a plurality of rollers and does not rotate some of the rollers or all of the rollers instead of the slip roller 51. When the inlet conveyor 50 is a roller that does not rotate on all of the rollers, the package A may be transported to the first stage t1 by utilizing the discharge momentum of the carry-out conveyor 10b.

50a in FIGS. 11 and 12A show a guide body that guides the package A on the inlet conveyor 50 and prevents the package A from falling off from the left and right sides of the inlet conveyor 50.
The guide body 50a is a plate-shaped body arranged on the left and right of the package A on the inlet conveyor 50 and extending along the transport direction of the inlet conveyor 50. The upstream side of the pair of guide bodies 50a in the transport direction is provided with a sub-entrance section 50b that gradually narrows the distance between the guide bodies 50a toward the downstream side (FIG. 11). A pair of guide bodies 50 are arranged substantially in parallel on the downstream side of the sub-entrance section 50b.

On the downstream end side of the inlet conveyor 50, the above-mentioned end stopper 50c that prevents the package A from moving from the downstream end is provided (FIG. 11). The end stopper 50c is a plate-shaped member arranged above the slip roller 51. The package A that has moved to the downstream end side of the inlet conveyor 50 comes into contact with the end stopper 50c and is stopped at the downstream end of the inlet conveyor 50.
The transport direction of the illustrated inlet conveyor 50 is the same as the transport direction of the front packaging device B shown in FIG. 2, but in FIG. 11, the transport direction is drawn so as to be opposite to FIGS. 2 (a) and 2 (b) for convenience. ing.

In the transfer device 52, the first stage t1, the second stage t2, the third stage t3, and the fourth stage t4 are set in order from the upstream side to the downstream side of the movement path of the package A. ..
The first stage t1 is provided on the left side or the right side of the downstream end of the inlet conveyor 50.
In this example, the inlet conveyor 50 is arranged on the downstream side of the carry-out conveyor 10b of the front packaging device B.

In this example, the transfer device 52 starts from the downstream end side t of the inlet conveyor 50, and from the downstream end side t, the first stage t1, the second stage t2, the third stage t3, and the fourth stage t4 The package A is transferred in order (FIGS. 11 and 13 (a), (b) and (c)).
The transfer device 52 moves the plurality of packages A from the downstream end side t of the inlet conveyor 50 to the first stage t1, the first stage t1 to the second stage t2, and the second stage t2. The movement from the stage t2 to the third stage t3 and the movement from the third stage t3 to the fourth stage t4 are performed at the same time.
Further, the transfer device 52 intermittently performs the above-mentioned movement, and during the above-mentioned movement, the package A is temporarily kept in each of the above-mentioned stages.

In this example, as described above, the transfer direction of the transfer device 52 that transfers the package A from the downstream end of the inlet conveyor 50 to the outlet conveyor 59 with respect to the transfer (feed) direction of the inlet conveyor for the package A ( The moving direction of the package A) is substantially perpendicular (FIG. 11). In this example, when the movement on the inlet conveyor 50 is changed to the movement by the transfer device 52, the package A turns left in the traveling direction, but the packaging device 100 may be configured to turn right.

Specifically, the transfer device 52 includes a long mounting plate 53 arranged with the plate surface facing up and down, a feed operation unit 54, and a guide member 58.
The mounting plate 53 extends at a substantially right angle to the transfer direction of the inlet conveyor 50 in a plan view. The extending direction of the mounting plate 53 is the transfer direction of the package A by the transfer device 52.
The upper surface of the mounting plate 53, in order along the longitudinal direction of the mounting plate 53, is the first stage t1, the second stage t2, the third stage t3, and the fourth stage t4, respectively. Provide an area.

The first stage t1 is adjacent to the right or left side of the downstream end side t of the inlet conveyor 50. In this example, the first stage t1 is adjacent to the right side on the downstream end side of the inlet conveyor 50 with respect to the front surface of the packaging device 100 so as to turn left as described above from the moving direction of the inlet conveyor 50 (six views of the design). It is the same as the left and right sides of the ship, and is the opposite of the starboard and port sides of the ship).

In the inlet conveyor 50, the guide body 50a transfers the package A from the inlet conveyor 50 (downstream end side t) to the first stage t1 and the front-folding operation portion 63 and the back-folding operation portion of the front-rear bending device 60 described later. Each of the pair of left and right guide bodies 50a does not extend to the downstream end side t of the inlet conveyor 50 and is interrupted in the middle of the transfer direction of the inlet conveyor 50 so as not to interfere with the operation of 64.
However, in order to guide the package A on the inlet conveyor 50 at the interrupted end in the same manner as the pair of guide bodies 50a, a plate-shaped side stopper is placed on the extension line of the right guide body 50a of the pair of left and right guide bodies 50a. 50d is provided, and a plate-shaped sub-guide body 50e is provided on an extension line of the guide body 50a on the left side.

Regarding the transfer direction of the inlet conveyor 50a, the side stopper 50d appears and disappears from the downstream side of the right side guide body 50a toward the downstream end of the right side guide body 50a. The packaging device 100 includes, in this example, a rod 50f and a cylinder 50g in which the rod 50f is infested by fluid pressure, as an infestation means for infesting the side stopper 50d. The side stopper 50d is attached to the tip of the rod 50f, and the side stopper 50d approaches and separates from the downstream end of the guide body 50a on the right side due to the appearance of the rod 50f from the cylinder 50g. In this example, the rod 50f and the cylinder 50g that causes the rod 50f to appear and disappear by the fluid pressure of gas or liquid are adopted, but other well-known mechanical operating means may be adopted as the means for causing the side stopper 50d to appear and disappear. ..

The sub-guide body 50e is provided at a slight distance from the downstream end of the left guide body 50a, and does not change its position like the infested side stopper 50d.
However, in order not to interfere with the movement of the contact body 57 located on the most upstream side of the transfer device 52 described later, the sub-guide body 50e is provided with a notch portion in which the portion through which the contact body 57 passes is cut out. The contact body shall be passed through the notch (not shown). In addition, the sub-guide body 50e is composed of a plurality of plate-shaped bodies arranged with a gap between them in the transfer direction of the inlet conveyor 50, and is located on the most upstream side of the transfer device 52 from the gap. It may be passed through the contact body 57 (not shown).

Starting from the downstream end side t of the inlet conveyor 50, the feed operation unit 54 circulates back and forth and up and down while being displaced by one stage in the extending direction of the mounting plate 53 in the longitudinal direction of the mounting plate 53 (FIG. 13 (FIG. 13). a) (b) (c)). The mounting plate 53 and the guide member 58 are fixed to other parts (immovable parts such as structural parts (not shown) of the present packaging device 100) and do not change their positions.

The transfer device 52 will be described in more detail.
The mounting plate 53 includes one or more (two streaks in this example) slits 55 extending along its longitudinal direction (FIG. 11). The guide member 58 is arranged and placed on both sides of the package A on the mounting plate 53 in a direction orthogonal to the longitudinal direction of the mounting plate 53 so that the package A being transported does not fall off from the mounting plate 53. It is a plate-shaped member extending along the longitudinal direction of the plate 53. The pair of guide members 58 extend in parallel with the plate surfaces facing each other.
Further, the distance between the pair of guide members 58 is smaller than the front-rear width of the package A before being folded by the front-rear folding device 60 described later. Specifically, the distance between the pair of guide members 58 is substantially the same as or slightly larger than the width of the front and rear of the packaged object 1. In this example, the guide member 58 extends from the upstream end side of the mounting plate 53 to the outlet conveyor 59.

The feed operation unit 54 includes a substantially rectangular substrate 56 extending below the above-mentioned mounting plate 53 with the plate surface facing up and down along the longitudinal direction of the mounting plate 53 (FIG. 13). On the upper surface of the substrate 56, a plurality of rod-shaped contact bodies 57 projecting upward are arranged along the longitudinal direction of the substrate 56 at intervals from each other. In this example, the abutting bodies 57 are arranged in two rows with a front-rear distance between them along the longitudinal direction, and each of the abutting bodies 57 in one row has slits 55 of the two lines. Each of the abutting bodies 57 in the other row projects upward from the other of the two slits 55 above the upper surface of the mounting plate 53.
The contact body 57 in one row and the contact body 57 in the other row may be provided on the same base 56, but the base 56 provided with the contact body 57 in one row. And the substrate 56 with the abutment 57 in the other row may be formed separately and act synchronously. As shown in FIG. 11, in this example, the substrate 56 is independent for each row of the abutting bodies 57.

When the package A is transported between the stages, the substrate 56 of the feed operation unit 54 keeps the plate surface substantially horizontal in the feed drive unit (not shown), and the transport direction is set to the forward direction. The circulation operation is performed by operating in the front-back and up-down directions with the opposite direction as the backward direction.
By the circulation operation of the feed operation unit 54, each of the contact bodies 57 advances in the transport (transfer) direction of the package A (FIG. 13 (a)), and the starting point is the downstream end side t of the inlet conveyor 50. As a (starting point), the package A is pushed from the upstream stage to the next stage on the downstream side to be conveyed (FIG. 13 (b)), and when the package A is sent to the next stage, it is inside the slit 55 or below the slit 55. It sinks (Fig. 13 (c)). After the contact body 57 is submerged, the feed operation unit 54 retracts and rises to return the contact body 57 to the original position before the advance (FIG. 13 (a)).
With the completion of the steps in each of the above stages, the feed operation unit 54 repeats the above circulation operation to sequentially feed the package A from the downstream end side of the inlet conveyor 50 toward the fourth stage t4. (FIGS. 13 (a) to 13 (c)).

For example, the contact body 57 arranged at the most upstream of the substrate 56 in the transfer direction of the transfer device 52 is opposite to the mounting plate 53 on the left and right sides of the package A on the inlet conveyor 50 (downstream end side t). It is located (on the left side in this example). When the process of each stage is completed, each contact body 57 advances to the downstream side in the transfer direction of the transfer device 52. At this time, the contact body 57 arranged on the most upstream side of the substrate 56 among the plurality of contact bodies A pushes the package A located on the downstream end side t of the inlet conveyor 50 to the first stage t1. After that, it sinks from the upper surface of the slip roller 51, retracts to the original position by the above circulation operation, and protrudes upward from the upper surface of the slip roller 51 again (at the downstream end side t of the inlet conveyor 50, the upper surface of the slip roller 51 again. Protruding from). At the same time, the contact body 57 arranged on the downstream side of the contact body 57 by one stage in the substrate 56 advances to the downstream end of the first stage t1 and is in the package A in the first stage t1. Is submerged from the upper surface of the mounting plate 53 after being fed to the second stage t2, returned to the upstream end of the original first stage t1 by the circulation operation, and protrudes upward from the upper surface of the mounting plate 53 again.

At the same time, the contact body 57 located on the downstream side of the next one stage (two stages with respect to the contact body 57 on the most upstream side) is from the upstream end of the second stage t2 to the second stage t2. The contact body 57 located between the downstream ends and further downstream by one stage (three stages with respect to the most upstream contact body 57) is the third from the upstream end of the third stage t3. Between the downstream ends of the stage t3, the same operation as that of the most upstream contact body 57 is performed.
The package A that has advanced to the fourth stage t4 by moving the contact body 57 to the downstream end of the third stage t3 is directly exited by the transfer device 52 (the most downstream contact body 57). Although it is not carried to the conveyor 59 and stays at the fourth stage t4, it is pushed out to the outlet conveyor 59 by the subsequent packaging body A, and the main packaging device 100 is carried out by the outlet conveyor 59. Although the outlet conveyor 59 is a belt conveyor in this example, other well-known transport means such as a roller conveyor may be adopted. For example, the outlet conveyor 59 may be configured by a slip roller as in the inlet conveyor 50.

(Front and rear folded portion forming step s2)
In the front-rear folding portion forming step s2, the front and rear of the packaging body a is bent to the left or right side of the packaging body a by the front-rear folding device 60, and the front-folding portion 4a and the back-folding portion are folded into the packaging body A. 4b is formed (FIGS. 11, 14 (a) and 15 (b) (e)).
The front-back bending device 60 includes a front-folding action unit 61, a back-folding action section 62, a front-folding operation section 63, and a back-folding motion section 64.

The front folding action portion 61 protrudes relatively toward the package A from either the left or right side (right side in this example) of the package A, and is between the top seal To and the object to be packaged 1. The top seal To is folded toward the object to be packaged 1 side of the package A, and the front folded portion 4a is formed on the package A.
The back-folding action portion 62 protrudes relatively toward the package A from the left and right sides (right side in this example) of the package A, and is between the tail seal Ta and the object to be packaged 1. The tail seal Ta is folded toward the object to be packaged 1 side of the package A, and the post-folded portion 4b is formed on the package A.

Specifically, before processing by the packaging device 100, the package A is also conveyed (transferred) in the inlet conveyor 50 with the top seal To side in front and the tail seal Ta side behind.

The transport direction by the inlet conveyor 50 is the front-rear direction, the front-folding action portion 61 is a rectangular plate-shaped body having front and back sides, and the front-folding operation portion 63 is also a rectangular plate-shaped body having front and back sides. be.
The front-folding operation portion 63 is located on the opposite side of the front-folding action portion 61 with the package A in the left-right direction of the package A that has moved to the downstream end side t of the inlet conveyor 50, and is located on the opposite side of the front-folding operation portion 61. The portion 63 is displaced along the rear surface of the front folding action portion 61 and presses between the top seal To of the package A and the packaged object 1. The front fold 4aa is formed between the top seal To of the package A and the object to be packaged 1 pressed by the front fold operation portion 63. Then, the package A is displaced in the direction of the pressing by the pressing of the front folding operation portion 63, so that the front folding action portion 61 protrudes relatively with respect to the packaging A, that is, in front of the packaging A, that is, The top seal To side is folded and the folded portion 4a before bending is formed on the package A.

The transport direction by the inlet conveyor 50 is the front-rear direction, the back-folding action portion 62 is a rectangular plate-shaped body whose front and back are front and back, and the back-folding operation portion 64 is also a rectangular plate-shaped body whose front and back are front and back. be.
The back-folding operation portion 64 is located on the opposite side of the back-folding action portion 62 with the package A in the left-right direction of the package A that has moved to the downstream end side of the inlet conveyor 50, and is located on the opposite side of the back-folding operation portion 62. 64 is displaced along the front surface of the back-folding action portion 62 and presses between the tail seal Ta of the package A and the object to be packaged 1. The space between the tail seal Ta of the package A pressed by the back-folding operation portion 64 and the object to be packaged 1 is the back-folding 4bb. Then, the back-folding action portion 62 is displaced relatively in the direction of the pressing due to the above-mentioned pressing of the back-folding operation portion 64, so that the back-folding action portion 62 protrudes relatively with respect to the packaging body, and after the packaging body A. That is, after bending the tail seal Ta side, the folded portion 4b is formed on the package A.

In the above, the front and rear folds 4aa and the rear fold 4bb make the front and back of the package A valley-folded toward the rear in the transfer direction of the transfer device 52, and the front fold overlap portion 4a and the rear fold overlap portion 4b have the tips thereof. Turn to the rear in the transfer direction.
The front-folded overlapping portion 4a and the rear-folded overlapping portion 4b face the rearward direction, that is, opposite to the direction of transfer by the transfer device 52 (folded in the direction opposite to the transfer direction), so that the front-folded overlapping portion is between the guide members 58. The 4a and the rear-folded overlapping portion 4b are not rolled up by the transfer of the transfer device 52, and the package A can be smoothly transferred.

In this example, the front folding action portion 61 is configured on one upstream end side of the paired guide member 58 of the transfer device 52, and the back folding working portion 62 is located on the other upstream end side of the paired guide member 58. It is composed of. That is, the upstream end side of each of the guide members 58 in the transfer direction of the transfer device 52 constitutes the front folding action portion 61 and the back folding action portion 62, respectively. The front folding action portion 61 and the back folding action portion 62 are arranged in parallel with each other as a part of each guide member 58.
When some of the sensors detect the arrival of the package A on the downstream end side t of the inlet conveyor 50, the front-rear folding device 60 integrates the lower front folding operation unit 62 and the back folding operation unit 64 of the control unit. The lateral actuating device 65 is provided so as to simultaneously push forward and backward of the package A sent to the downstream end side of the inlet conveyor 50.

The front-folding operation unit 62 and the back-folding operation unit 64 are located on the left and right sides of the package A that has moved to the downstream end side t of the inlet conveyor 50 on the opposite sides of the package A with the package A in between. To position.
The front folding operation unit 62 and the back folding operation unit 64 are integrally pushed toward both guide members 58 by the lateral actuating device 65, and the front folding operation unit 62 and the back folding operation unit 64 are each of the two guide members 58. Displace along each of the facing surfaces (the rear surface of the front folding action portion 61 and the front surface of the back folding action portion 62). The control unit operates the transfer device 52 (feed operation unit 54) in synchronization with the displacement of the front folding operation unit 63 and the back folding operation unit 64 by the lateral operation device 65, thereby operating the transfer device 52 (feed operation unit 54) most upstream of the feed operation unit 54. The contact body 57 located on the side is moved toward the first stage t1. The package A that was on the inlet conveyor 50 (downstream end side) due to the movement of the contact body 57 synchronized with the displacement of the front folding operation portion 63 and the back folding operation portion 64 is the front folding portion 4a. And the back-folded portion 4b are formed. A front-folded portion 4a and a rear-folded portion 4b are formed on the package A that has reached the first stage t1.

That is, the lateral actuating device 65 integrally drives the front folding operation unit 63 and the back folding operation unit 64 to simultaneously perform the pressing operation, and the package A performs the pressing operation and the transfer by the transfer device 52. By being sandwiched between the front folding action portion 61 and the back folding action portion 62, the front and rear sides of the package A can be bent.
The front-folding action portion 61 and the back-folding action portion 62 configured on the upstream side of the pair of guide members 58 are smaller than the front-rear distance of the package A before being folded back and forth, and are front-folding operation portions. It is a plate-like body extending in parallel with each other along the transport direction of the transfer device 52 with a gap slightly larger than the width between the front surface of the 62 and the rear surface of the rear folding operation portion 64 (FIG. 11).

In this example, the lateral actuating device 65 is a connecting member 65a for connecting both base ends via a base end between a front folding operation portion 63 and a back folding operating portion 64 arranged in parallel with each other, and an actuating plate. It includes a 65b, an actuating rod 65c whose tip is fixed to the actuating plate 65b, and an actuating cylinder 65d that causes the actuating rod 65c to appear and disappear by fluid pressure. The actuating plate 65b is coupled to any one of the front folding operation portion 62, the back folding operating portion 64, and the connecting member 65 (in this example, the connecting portion of the connecting member 65a with the front folding operating portion 62 base end) and operates. Due to the above-mentioned infestation of the actuating rod 65c by the cylinder 65d, the front-folding operation portion 62 and the back-folding operation portion 64 are integrally displaced.

Further, in this example, the tips of the front folding action portion 61 and the back folding action portion 62, that is, the upstream end sides of the pair of guide members 58, are spaced from each other toward the downstream side in the transfer direction of the package A by the transfer device 52. It is provided with an introduction section 58a that is gradually narrowed toward the direction. The introduction section 58a allows the front folding operation section 62 and the back folding operation section 64 to be smoothly guided between the front folding action section 61 and the back folding action section 62. .. Both guide members 58 extend in parallel with each other on the downstream side of the introduction section 58a.

If the front-folding portion 4a and the back-folding portion 4b can be appropriately formed, the front-folding portion A is moved between the front-folding action portion 61 and the back-folding action portion 62 by the transfer device 52. The overlapping portion 4a and the back folding operating portion 4b may be formed, and the front folding operating portion 62 and the rear folding operating portion 64 (including the lateral actuating device 65) may not be provided.
Further, in the illustrated example, the transfer device 52 shall only move the package A from the first stage t1 to the downstream side, and the transfer of the package A from the inlet conveyor 50 to the first stage t1 shall be performed. Regardless of the device 52, it may be performed only by the above-mentioned pressing of the front folding operation unit 62 and the back folding operation unit 64.

(Front and rear middle overlapping portion forming step s3)
In the front-rear middle stacking portion forming step s3, the front-rear middle stacking device 70 folds the portion of the front folding portion 4a above the object to be packaged 1 toward the rear of the package A, and wraps the upper end side of the top seal To. The front middle stacking portion 4c to be arranged directly above the object 1 is formed on the package A, and the portion of the rear folding portion 4b above the packaged object 1 is folded toward the front of the package A and the tail seal Ta is formed. A rear middle stacking portion 4d in which the upper end portion side is arranged directly above the packaged object 1 is formed on the package A (FIGS. 14 (b) and 15 (c) (f)).

Specifically, the front-rear stacking device 70 includes a front-middle stacking action unit 71, a rear-middle stacking action section 72, a front-middle stacking drive device 73 for operating the front-middle stacking action section 71, and a rear-middle stacking action section 72. It is provided with a rear-middle stacking drive device 74 (FIG. 11).

The front-middle stacking action portion 71 is driven by the front-middle stacking drive device 73 and protrudes rearward from the front of the package A toward the package A, and is a portion of the front-folded portion 4a above the packaged object A. Is folded toward the rear of the package A, and the front middle stacking portion 4c is formed on the package A so that the upper end side of the top seal To is placed directly above the packaged object 1. The first upper surface arrangement portion To2 extending back and forth directly above the packaged object 1 while the portion remaining on the front surface portion 2aa of the package A of the top seal To due to the formation of the front middle overlapping portion 4c is used as the front arrangement portion To1. Can be formed.

The rear-middle stacking action portion 72 is driven by the rear-middle stacking drive device 74 and protrudes forward from the rear of the package A toward the package A, and is a portion of the rear-folded portion 4b above the packaged object A. Is folded toward the front of the package A, and the rear middle stacking portion 4d is formed on the package A so that the upper end side of the tail seal Ta is placed directly above the packaged object 1. The second upper surface arrangement portion Ta2 extending back and forth directly above the packaged object 1 while the portion remaining on the rear surface portion 2bb of the package A of the tail seal Ta due to the formation of the rear middle overlapping portion 4d is used as the rear surface arrangement portion Ta1. Can be formed.

In this example, the front-middle stacking action section 71 and the rear-middle stacking action section 72 are plate-shaped bodies with the front and back facing up and down. In the package A transferred onto the first stage t1, the front-middle stacking action section 71 is arranged in the front and the rear-middle stacking action section 72 is arranged in the rear. Each of the front-middle stacking action section 71 and the rear-middle stacking action section 72 is arranged at a position lower than the side end portion 3e in the vertical direction and slightly higher than the upper surface of the packaged object 1.

The front-middle stacking drive device 73 has a plate-shaped link member 73a whose tip is fixed to the base end side of the front-middle stacking action portion 71, which is a long plate-shaped body, and a plate-shaped link member 73a directly to the base end of the link member 73a. Alternatively, it is provided with a rotation drive unit (not shown) such as an indirectly provided motor.
In the rotation drive unit, the link member 73a rotates about its base end, and the rotation causes the front-middle stacking action unit 71 to protrude rearward (on the package A on the first stage t1 in FIG. 11). (As shown by the broken line drawn in), it slides horizontally along the upper surface of the packaged object 1 (FIGS. 11 and 14 (b)). The slide forms a front-middle stacking portion 4c on the package A.

The rear-middle stacking drive device 74 is a plate-shaped link member 74a whose tip is fixed to the base end side of the rear-middle stacking action portion 72, which is a long plate-like body, and the rear-middle stacking drive device 74 directly to the base end of the link member 74a. Alternatively, it is provided with a rotation drive unit (not shown) such as an indirectly provided motor.
The link member 74a rotates about its base end in the rotation drive unit, and the rear-middle stacking action unit 72 protrudes forward due to the rotation (on the package A on the first stage t1 in FIG. 11). (As shown by the broken line drawn in), slide horizontally along the upper surface of the object to be packaged 1. The slide forms a rear-middle stacking portion 4d on the package A.

Under the control of the control unit, each of the slides of the front-middle stacking action unit 71 and the rear-middle stacking action section 72 by the front-middle stacking drive device 73 and the rear-middle stacking drive device 74 can be performed at the same time.
In addition to the link mechanism that employs the link members 73a and 74a, the front-middle stacking drive device 73 and the rear-middle stacking drive device 74 employ other well-known operating means such as a cylinder that causes the rod to appear and disappear by fluid pressure. It is also possible to carry out.

(Left and right upper overlapping portion forming step s4)
In the left and right upper stacking portion forming step s4, the left and right upper stacking portions are stacked with respect to the package A on the first stage t1 in which the front middle stacking portion 4c and the rear middle stacking portion 4d are formed by the front and rear middle stacking portion forming step s3. The device 80 forms the upper left overlapping portion 4e and the upper right overlapping portion 4f (FIGS. 16 (d) and 17 (e)).

The left-right upper stacking device 80 includes an upper left stacking action section 81 and an upper right stacking action section 82 (FIGS. 12 (c), 13 and 14 (c) (d)).
The upper left stacking action portion 81 protrudes relatively toward the packaging body A from the left side of the packaging body A toward the packaging body A, and directly or indirectly onto the front middle stacking portion 4c and the rear middle stacking portion 4d. The overlapping upper left overlapping portion 4e is formed on the package A.
The upper right stacking action portion 82 protrudes relatively toward the packaging body A from the right side of the packaging body A toward the packaging body A, and directly or indirectly onto the front middle stacking portion 4c and the rear middle stacking portion 4d. The overlapping upper right overlapping portion 4f is formed on the package A.

Specifically, one of the upper left overlapping action portion 81 and the upper right overlapping action portion 82 is a rotating arm member 80a, and the tip of the arm member 80a is swung down by the rotation, so that the arm member 80a is directed toward the package A. It protrudes relatively from the package A to form either the upper left overlapping portion 4e or the upper right overlapping portion 4f.
The other one of the upper left overlapping action portion 81 and the upper right overlapping action portion 82 is a plate-shaped member 80b whose front and back are up and down, and the front middle stacking portion 4c and the rear middle stacking portion 5d are packaged in the vertical direction before formation. The plate-shaped member 80b is provided at a position lower than the upper end of A and slightly higher than the packaged object 1, and the plate-shaped member 80b is provided on the opposite side of the package A with respect to the tip of the arm member 80a to be swung down. The moving device, that is, the transfer device 52 moves the package A under the plate-shaped member 80b, so that the plate-shaped member 80b protrudes relatively toward the package A with respect to the package A. The other one of the upper left overlapping portion 4e and the upper right overlapping portion 4f is formed.

In this example, the upper left overlapping action portion 81 is the arm member, and the upper right overlapping action portion 82 is the plate-shaped member.
The upper left stacking action portion 81 is rotated and swung down to move along the upper surface of the packaged object 1 of the package A, and the upper left stacking action portion 81 uses the packaged object 1 on the left side of the package A to cover the upper portion of the package. By pressing to the right side (in this example, the transfer direction of the transfer device 52), the upper portion is folded toward the right side onto the upper surface of the packaged object 1 (FIGS. 12 (c), 14 (b) and 16 (FIG. 16). (A) (b) (c)). The folded portion is the upper left overlapping portion 4e. As shown in FIG. 14 (c), until the upper left overlapping action portion 81 forms the upper left overlapping portion 4e, the front middle overlapping acting portion 71 and the rear middle overlapping acting portion 71 forming the front middle overlapping portion 4c and the rear middle overlapping portion 4d are formed. The middle stacking action portion 72 stays on the formed front middle stacking portion 4c and the rear middle stacking portion 4d, and presses the front middle stacking portion 4c and the rear middle stacking portion 4d. Under the control of the control unit, when the upper left overlapping action unit 81 completes the formation of the upper left overlapping action portion 4e, the front middle overlapping acting portion 71 and the rear middle overlapping acting portion 72 retreat from the top of the package A to the original positions. ..

More specifically, the left-right upper stacking device 80 includes the plate-shaped member 80b extending from the downstream side of the first stage t1 of the mounting plate to the fourth stage t4 above the mounting plate 53, and the arm member. The 80a, the support frame 80c fixed to the structural member 101 forming the framework of the packaging device 100, the rotary bar 80d which is a plate-shaped or rod-shaped member pivotally supported by the support frame 80c, and the base end of the rotary bar 80d. The main rod 80e, which is axially fixed to the tip side, the main cylinder 80f, which is fixed to a structural portion (not shown) of the present packaging device 100 and causes the main rod 80e to appear and disappear by fluid pressure, and the tip to the base side of the arm member 80a. The link lever 80h, which is a plate-shaped or rod-shaped member integrally formed with the arm member 80a via the boss 80g, the auxiliary rod 80i axially fixed to the base end side of the link lever 80h, and the rotating bar 80d are fixed to each other. It is provided with a sub-cylinder 80j in which the sub-rod 80i appears and disappears by fluid pressure (FIGS. 12 (b) and 12 (c)). 80k in FIG. 12B shows a stay (jig) for fixing the sub-cylinder j to the rotating bar 80d.

As described above, the plate-shaped member 80b is located at a position lower than the upper end of the package A before folding the side end portion 3e on the first stage t1 and slightly higher than the upper surface of the packaged object 1 in the vertical direction, as described above. It extends horizontally from the downstream side of the first stage t1 to the fourth stage t4 (FIGS. 12 (b) (c) and 13).
The support frame 80c is a pole extending up and down, and pivotally supports the rotating bar 80d at a position higher than the upper end of the package A on the mounting table 53 before the side end portion 3e is folded.
When the main cylinder 80f makes the main rod 80e appear and disappear, the rotating bar 80d rotates about the position pivotally supported by the support frame 80c. Due to the rotation of the rotating bar 80d, the arm member 80a attached to the tip end side of the rotating bar 80d is swung down from above the package A toward the package A. Further, the arm member 80b moves by scooping from the upstream side to the downstream side in the transfer direction of the transfer device 52 by the rotation of the rotation bar 80d, and strokes the upper surface of the packaged object 1 (FIGS. 12 (c) and 13). , FIGS. 14 (c) (d)).

The arm member 80a is integrally formed with the plate-shaped base end portion 80aa provided with the above-mentioned boss 80g and the base end portion 80aa toward the tip end side of the base end portion 80aa with an obtuse angle with respect to the base end portion 80aa. It is composed of a plate-shaped intermediate portion 80ab and a plate-shaped tip portion 80ac integrally formed with the intermediate portion 80ab toward the tip end side of the intermediate portion 80ab with an obtuse angle with respect to the intermediate portion 80ab.
During the movement of the arm member 80a due to the rotation of the rotation bar 80d, the sub-cylinder 80j causes the sub-rod 80i to appear and disappear to change the direction of the link lever 80h, and the arm member 80a integrated with the link lever 80h rotates about the boss 80g. Let me.
That is, the arm member 80a revolves around a portion pivotally supported by the support frame 80c of the rotation bar 80d by the rotation of the rotation bar 80d, and the boss is pivotally supported by the rotation bar 80d by the above-mentioned orientation change of the link lever 80h. It rotates around 80g. Due to the rotation performed by the rotation bar 80d, the arm member 80a gradually changes the scooping angle to one suitable for forming the upper left overlapping portion 4e on the package A when moving on the upper surface of the object to be packaged 1. Can be done.
More precisely, it is the tip portion 80ac of the arm member 80a that moves so as to stroke the upper surface of the packaged object 1 so that the upper left upper portion of the package A is the upper left overlapping portion 4.
While the arm member 80a is swung down, the rotation of the tip 80ac gradually reduces the sandwiching angle between the tip 80ac and the rotation bar 80d, so that the rotation bar 80d can be made into a compact package A having a small rotation diameter. On the other hand, the tip portion 80ac can be shallowly scooped on the object to be packaged 1 of the package A by approaching the package A in an upright position and not close to each other, and the upper part of the package A can be smoothly scooped without enlarging the device. It is possible to fold it easily.

Under the control of the control unit, the upper left overlapping action unit 81 completes the formation of the upper left overlapping action portion 4e, and the front middle overlapping acting portion 71 and the rear middle overlapping acting portion 72 retract from the top of the package A to their original positions. The transfer device 52 operates the feed operation unit 54 to move the package A provided with the upper left overlapping portion 4e to the downstream side by moving the contact body 37, and the plate-shaped member 80b which is the upper right overlapping acting portion 82. It is sent to the bottom (FIG. 13 and FIG. 14 (d)). Due to the movement of the package A, the upper right overlapping action portion 82 (upstream end portion of the plate-shaped member 80b) is relatively pushed toward the package A from the right side of the package A with respect to the package A. Pushed by the upper right overlapping action portion 82, the portion above the packaged object A on the right side of the package A is folded to the left and overlapped on the upper left overlapping portion 4e to form the upper right overlapping portion 4f (FIG. 14 (d)). And FIG. 16 (d)).

In this example, in the package A, the upper left overlapping portion 4e and the upper right overlapping portion 4f are formed on the package A from the first stage t1 to the second stage t2 by the transfer device 52 (FIG. 13). .. The package A is temporarily stopped at the second stage t2, but in this example, the package A is not particularly processed at the second stage t2.
The upper left overlapping action portion 81 may be used as the plate-shaped member 80b, and the upper right overlapping acting portion 82 may be used as the arm member 80a.
Further, as the moving device, a well-known device for moving the package A separately from the transfer device 52 can be used.

(Fixed portion forming step s5)
In the fixing portion forming step s5, the fixing portion 4g for fixing the upper right overlapping action portion 82 to the upper left overlapping action portion 81 is formed on the package A by the fixing device 90 (corresponding to the fixing action portion within the claims) (corresponding to the fixing action portion within the claims). 14 (f) (g) and 17 (e)).
In this example, the fixing portion 4g is a heat sealing portion formed by a heat seal, and the fixing device 90 is a moving means (not shown) for bringing the heating element 91 and the heating element 91 into contact with the package A by moving. ) And. As the moving means of the heating element 91, a well-known moving means such as a cylinder that causes the piston to appear and disappear by fluid pressure or a link mechanism can be adopted.
As the heating element 91, a heater such as a spot seal heater that generates heat required for heat sealing can be adopted. As the heating element 91, a heater provided with a heating wire that generates heat by general energization may be adopted.

The formation of the anchored portion 4g is performed in the third stage t3 in this example (FIGS. 12 (b), 13 and 14 (f)).
Specifically, in the plate-shaped member 80b, an insertion portion 80m that vertically penetrates or cuts out the plate-shaped member 80b is formed at a portion located directly above the third stage t3, and has a plate-shaped shape. The heating element 91 standing by above the member 80b descends by the moving means, abuts on the upper surface of the package A through the insertion portion 80 m, and is heat-sealed to form the fixed portion 4 g on the package A (. FIG. 14 (f).
The fixing portion 4g is formed in a region where the upper right overlapping acting portion 82 overlaps with the upper left overlapping acting portion 81 (FIG. 17 (e)).
After forming the fixing portion 4g on the package A, the heating element 91 returns to the lower position above the plate-shaped member 80b by the moving means. The package A on which the fixing portion 4 g is formed is carried from the third stage t3 to the fourth stage t4 by the transfer device 52 (FIG. 13).

(Cooling step s6)
As the cooling step s6, in the fourth stage t4, the package A maintains the state of being in contact with the metal plate-shaped member 80b, and the heat of the fixing portion 4g formed by the heat seal is transferred to the plate-shaped member 80b. Heat is dissipated to and cools the fixed portion 4 g.
The package A is not carried to the outlet conveyor 59 further downstream by the transfer device 52, but stays at the fourth stage t4 until it is extruded to the outlet conveyor 59 by the subsequent package A to perform the above cooling. can.

(Change example)
In the above, the fixed portion 4 g of the package A is a heat-sealed portion, but the fixed portion 4 g can also be formed as a hot melt portion (adhesive portion) by hot melt.
In this case, the fixing device 90 may include a nozzle for ejecting the adhesive, and may eject the adhesive onto the upper left overlapping portion 4e after forming the upper left overlapping portion 4e and before forming the upper right overlapping portion 4f. ..

In the above, the front-folding operation portion 63 and the back-folding operation portion 64 are set to press the positions where the front folds 4aa and the back folds 4bb of the package A are pushed out. In addition, the front-folding action portion 61 and the back-folding action section 62 are formed separately from the guide member 58, and the front-folding motion section 63 and the back-folding motion section 64 are fixed at fixed positions and do not operate. , The front folding action portion 61 and the back folding action portion 62 protrude toward the package A and press the front and back of the package A, and the front fold 4aa and the back fold 4bb of the package A are forward-folded. The front folding operation unit 63 and the back folding operation unit 64 may be pressed against the operation unit 63 and the back folding operation unit 64 (in this case, since the front folding operation unit 63 and the back folding operation unit 64 do not move, the front folding operation unit 63 may be pressed against the front folding auxiliary unit 63 and the back folding operation unit 64. 65 is called a back folding auxiliary part 65).

Further, in the front packaging device B, the wrinkle removing guide 26 is provided in the gripping devices 21 and 22, but in addition to this, each of the wrinkle removing guides 26 is provided separately from the gripping devices 21 and 22 and is a gripping device. It may be opened and closed independently of 21 and 22.
Further, as long as the wrinkle removal can be smoothly performed, it may be provided only on the upstream side of the block 28.

In the above-mentioned front packaging device B, the tail sealing device 15 (sealing means 15a), the top sealing device 14 (sealing means 15a), and the cutting device Cu are provided in each of the pair of blocks 28 and operate integrally. However, each device can also be installed in an independent block.
In the example of FIG. 1, a package A having a gap space Su between the center seal Ss and the object to be packaged 1 is shown, but an upright center seal that is flush with the left and right sides of the top seal To and the tail seal Ta. It suffices as long as it forms Ss, and in the example of FIG. 1, it does not exclude the formation of the package A having no gap space Su.

(Summary)
The present invention provides a sandwich package A suitable for use. The package A includes one plastic film sheet 3 exhibiting a hollow substantially hexahedron and an object to be contained 1 housed in the internal space of the film sheet 3, and the front surface portion 2aa to the upper surface portion 2cc of the hexahedron. It is provided with a streak-shaped front upper thick portion To extending to the front surface portion 2bb and a streak-shaped rear upper thick portion extending from the rear surface portion 2bb to the upper surface portion 2cc. The film sheet 3 is partially sealed, and the front upper thick portion To is folded over the surfaces of the front surface portion 2aa and the upper surface portion 2cc to become a part of the surface of the front surface portion 2aa and the upper surface portion 2cc, and is rear upper. The thick portion Ta is folded over the surfaces of the rear surface portion 2bb and the upper surface portion 2cc to become a part of the surface of the rear surface portion 2bb and the upper surface portion 2cc. The rear upper thick portion Ta constitutes a substantially L-shaped angle that bends at the angle formed by the corner, and the rear upper thick portion Ta constitutes a substantially L-shaped angle that bends at the angle formed by the rear surface portion 2bb and the upper surface portion 2cc.

The present invention can be used in various industrial fields such as packaging of foods, agricultural products, livestock products such as meat, medical products, and packaging of electronic parts and parts of precision machinery.

A Package B Packaging device (front packaging device)
Cu cutting device G gusset Ss mating part Ta tail seal (rear upper thick part)
Ta1 (rear upper thick part Ta) rear surface arrangement part Ta2 (rear upper thick part Ta) second upper surface arrangement part To top seal (front upper thick part)
To1 (front upper thick part To) front arrangement part To2 (front upper thick part To) first upper surface arrangement part 1 packaged object 1b (packaged object 1) bottom
1e (Package 1) End 1s (Package 1) Side 2a (Package A) Front 2aa (Package A) Front 2b (Package A) Rear 2bb (Package A) 2cc (of packaging A) upper surface 2dd (of packaging A) lower surface 2ee (of packaging A) left side 2ff (of packaging A) right side 3 film sheet 3i (of film sheet 3) Inner surface 4 (of the device of packaging A) Opening
4a Front fold 4aa Front fold 4b Rear fold 4b Back fold 4c Front middle lap 4d Rear middle lap 4e Upper left lap 4f Upper right fold 4g Sticking part 10 Conveyor 10a (conveyor 10) Conveyor 10b Carry-out conveyor 10c (carry-out conveyor 10b) Tilt cylinder 10d Swing shaft 10f Transport surface 10h Guide plate 10k Inlet section 11 Film sheet supply device 11b Film supply drum 11c Drive roller vs. 12 Former 13 Stacking device (center seal) Device)
Roller of 13c (stacking device 13) 14 Top sealing device 14a (top sealing device 14) sealing means 15 Tail sealing device 15a (tail sealing device 15) sealing means 16 First gusset forming device 16a (first gusset forming) Gazette claw 17 (of device 16) Gazette claw 17 Second gusset forming device 17a (of second gusset forming device 17) Gazette claw 18 Wrinkling device 18a (of wrinkle removing device 18) Lever 18b Support shaft 18c (of wrinkle removing device 18) Wrinkle removal belt 18d (wrinkle removal device 18) roller 18e (wrinkle removal device 18) roller 18f (wrinkle removal device 18) lever drive unit 19 frame 20 adjuster 20a (adjuster 20) adjustment knob 21 (upstream side) ) Grip device 21a (grip device 21) pivot shaft 21b (grip device 21) grip arm 22 (downstream side) grip device 22a (grip device 22) pivot shaft 22b (grip device 22) grip arm 25 control Device 26 Wrinkle removal guide 26a (Wrinkle removal guide 26) Curved part 27 (Grip device 22) Drive device 28 Block 29 Arm 30 Support member 31 Detection device 32 Detection device 50 Inlet conveyor 50a Guide body 50b Sub-entrance section 50c End stopper 50d Side stopper 50e Sub-guide body 50f Rod 50g Cylinder 51 Slip roller 52 Transfer device 53 Mounting plate 54 Feeding operation part 55 Slit 56 Base 57 Contact body 58 Guide member 59 Exit conveyor 60 Front and rear bending device 61 Front folding action part 62 Back-folding action part 63 Front-folding action part 64 Back-folding action part 65 Lateral actuation device 65a Connecting member 65b Actuating plate 65c Actuating rod 65d Actuating cylinder 70 Front-rear middle stacking device 71 Front-middle stacking action part 72 Rear-middle stacking action part 73 Front-middle stacking drive device 73a Link member
74 Rear middle stacking drive device 74a Link member
80 Left and right top stacking device 80a Arm member 80b Plate-shaped member 80c Support frame 80d Rotating bar 80e Main rod 80f Main cylinder 80g Boss 80h Link lever 80i Sub rod 80j Sub cylinder 80k Stay 80m Insertion part 81 Upper left stacking action part 82 Upper right stacking action part 90
90 Fixing device 91 Heating element 100 Packaging device (main packaging device)

Claims (8)

The film sheet is provided with one film sheet and an object to be packaged on the film sheet, and the surface on which the packaged object is placed is used as an inner surface of the film sheet, and the film sheet protrudes left and right from the packaged object. A top seal that seals the left and right inner surfaces of the film sheet in a state where the left and right inner surfaces of the film sheet are overlapped in front of the packaged object with each of the left and right end portions facing upward of the packaged object, and a rear surface of the packaged object. The film sheet is provided with a tail seal that seals the left and right inner surfaces of the film sheet so as to overlap each other, the top seal extends vertically in front of the packaged object, and the tail seal extends behind the packaged object. The bottom side of the film sheet on which the packaged object was placed was provided with a gusset between the top seal and the packaged object and between the tail seal and the packaged object. It ’s a package,
A pre-folded portion for folding the top seal toward the packaged object side of the package is provided with a crease between the top seal and the packaged object.
A post-folding portion for folding the tail seal toward the packaged object side of the package is provided with a crease between the tail seal and the packaged object.
The portion of the front folded portion above the packaged object is provided with a front-middle layered portion that is folded rearward and the upper end portion side of the top seal is arranged directly above the packaged object.
The portion of the rear-folded portion above the packaged object is provided with a rear-middle layered portion that folds forward and arranges the upper end side of the tail seal directly above the packaged object.
The left and right end portions of the film sheet located above the packaged object on the left and right sides of the packaged object are designated as the upper left overlapping portion and the upper right overlapping portion, respectively.
One of the upper left overlapping portion and the upper right overlapping portion overlaps the front middle overlapping portion and the rear middle overlapping portion.
The other one of the upper left overlapping portion and the upper right overlapping portion is to be overlapped with the one of the upper left overlapping portion and the upper right overlapping portion.
A packaging body comprising a fixing portion for fixing at least the overlapping upper left overlapping portions to the upper right overlapping portion. The film sheet has a substantially rectangular shape mainly made of plastic and has a substantially rectangular shape.
The left and right sides of the film sheet that protrudes from the packaged object to the left and right are the left and right sides of the rectangle.
The package according to claim 1, wherein the fixing portion is a heat seal portion composed of a heat seal or a hot melt portion provided with a hot melt adhesive. A single film sheet with the inner surface facing up and a packaged object placed on the inner surface thereof are provided, and the film sheet has left and right side ends protruding from the packaged object to the left and right facing upward. A top seal that seals the left and right inner surfaces of the film sheet in an overlapped state in front of the package and a seal in which the left and right inner surfaces of the film sheet overlap each other behind the packaged object. With a tail seal, the top seal extends up and down in front of the packaged object, the tail seal extends up and down behind the packaged object, and the bottom of the film sheet on which the packaged object is placed. The side is provided with a gusset between the top seal and the packaged object and between the tail seal and the packaged object, respectively, with respect to a package having an opening at the top.
It is a packaging device that performs processing.
It is provided with a front folding action part, a back folding action part, a front middle stacking action part, a back middle stacking action part, an upper left overlapping action part, an upper right overlapping action part, and a fixing action part.
The front-folding action portion protrudes relatively toward the package from either the left or right side of the package, and the top is formed with a crease between the top seal and the object to be packaged. A pre-folded portion for folding the seal toward the packaged object side of the package is formed on the package.
The back-folding action portion protrudes relatively toward the package from either the left or right side of the package, and the tail is formed with a crease between the tail seal and the object to be packaged. After folding the seal toward the packaged object side of the package body, a folded portion is formed on the package body.
The front-middle stacking action portion protrudes relatively from the front of the package toward the package, and the portion of the front-folded portion above the object to be packaged is folded rearward. A front-middle stacking portion for arranging the upper end portion side of the top seal directly above the packaged object is formed on the package body.
The rear-middle stacking action portion protrudes relatively from the rear of the package toward the package, and the portion of the rear-folded portion above the object to be packaged is folded forward. A rear middle stacking portion for arranging the upper end portion side of the tail seal directly above the packaged object is formed on the package body.
The upper left stacking action portion projects relatively toward the packaging body from the left side of the packaging body toward the packaging body, and directly or indirectly onto the front middle stacking portion and the rear middle stacking portion. The overlapping upper left overlapping portion is formed on the package body, and the overlapping portion is formed on the package body.
The upper right stacking action portion projects relatively toward the packaging body from the right side of the packaging body toward the packaging body, and directly or indirectly onto the front middle stacking portion and the rear middle stacking portion. The overlapping upper right overlapping portion is formed on the package body, and the overlapping portion is formed on the package body.
The fixing action portion is a packaging device that forms a fixing portion for fixing at least the upper left overlapping portion and the upper right overlapping portion on the package by heat sealing or a hot melt adhesive. The package before processing is conveyed with the top seal side as the front and the tail seal side as the rear.
A front folding operation unit, a back folding operation unit, and a moving device for moving the package in a direction intersecting the transport direction are provided.
The direction of the transport is the front-back direction.
The front folding action portion has a plate-like shape with the front and back sides facing each other.
The back-folding operation portion is located on the opposite side of the front-folding action portion on the left and right sides of the package.
The front-folding operation portion is displaced along the rear surface of the front-folding action portion and presses between the top seal of the package and the object to be packaged.
When the package is displaced in the direction of the pressure by the pressing of the front folding operation portion, the front folding action portion is relatively pushed out with respect to the packaging body, and the front folding portion is moved to the front folding portion. Formed into a package,
The back-folding action portion has a plate-like shape with the front and back sides facing each other.
The back-folding operation portion is located on the opposite side of the back-folding action portion on the left and right sides of the package.
The back-folding operation portion is displaced along the front surface of the back-folding action portion and presses between the tail seal of the package and the object to be packaged.
When the package is displaced in the direction of the pressure due to the pressure of the back-folding operation portion, the back-folding action portion is relatively pushed out with respect to the package, and the back-folding portion is moved to the back-folding portion. Formed into a package,
One of the upper left overlapping action portion and the upper right overlapping action portion is a rotating arm member, and by swinging the tip down by the rotation, the arm member is relative to the package body toward the package body. It squeezes into and forms either the upper left overlapping portion or the upper right overlapping portion.
The other one of the upper left stacking action portion and the upper right stacking action portion is a plate-shaped member whose front and back are up and down, and the packaging body before the formation of the front middle stacking portion and the rear middle stacking portion in the vertical direction. The plate-shaped member is provided at a position lower than the upper end of the package and higher than the packaged object, and the plate-shaped member is provided on the opposite side of the package with respect to the tip of the arm member to be swung down.
When the moving device moves the package body under the plate-shaped member, the plate-shaped member protrudes relatively toward the package body with respect to the package body, and the upper left overlapping portion and the upper right overlapping portion are overlapped. It forms the other side of the part and
The packaging device according to claim 3, wherein the fixing action portion forms the fixing portion with respect to the packaging body in which the upper left overlapping portion and the upper right overlapping portion are formed. The front-folding action portion and the back-folding action portion are located on the same side on the left and right sides of the package, and the distance between the front-folding action portion and the back-folding action portion is the front-folding portion and the back-folding portion. It is smaller than the front-back width of the package before the formation of the folded portion and larger than the front-back width of the packaged object.
Both the front-folding operation portion and the back-folding operation portion are located on the left and right sides of the package on the opposite sides of the front-folding action portion and the back-folding action portion.
The packaging device according to claim 4, further comprising a lateral actuating device for integrally operating the front-folding operation portion and the back-folding operating portion to simultaneously perform each of the pressing operations. A transport device provided with a transport means for transporting an object to be packaged from upstream to downstream, a film sheet supply device that supplies a strip-shaped film sheet side by side with the transport surface of the transport device, and the film sheet. When the strip-shaped film sheet is supplied from the feeding device to the transport surface side, the film sheet is bent in a U shape with the transport direction of the object to be packaged and the film sheet in the front-rear direction and the left and right ends of the film sheet facing upward. The film sheet is provided with a former, and the objects to be packaged are sequentially placed on the film sheet bent in a U shape by the former so as to be separated from each other. A tail sealing device that forms a tail seal that extends vertically to the rear of the packaged object that precedes each other, and a front of the subsequent packaged object that is spaced between the separated objects of the film sheet. It has a top seal device that forms a top seal that extends up and down, and the tail seal device overlaps and seals the left and right inner surfaces of the film sheet behind the preceding object to be packaged. The tail seal is sequentially formed on the package of the object, and the top seal device seals the left and right inner surfaces of the film sheet in front of the subsequent object to be packaged so as to overlap and seal the subsequent package of the object to be packaged. The top seal is sequentially formed on the body, and the wrinkle removing device is provided, and the wrinkling device forms the top seal and the tail seal of the film sheet before the formation of the top seal and the tail seal. A package formed by a packaging device that stretches a portion to prevent wrinkles from remaining on the top seal and the tail seal after formation.
The packaging device according to claim 4 or 5, which is processed. A packaging method using the packaging device according to any one of claims 4 to 6. A single plastic film sheet, which is a hollow substantially hexahedron having an upper surface portion, a lower surface portion, a front surface portion, a rear surface portion, a left side surface portion, and a right side surface portion by being partially folded, and an internal space of the film sheet. A package with an contained object,
A streak-shaped front upper thick portion arranged to continuously extend from the front surface portion to the upper surface portion, and a streak-shaped rear upper thick portion arranged to continuously extend from the rear surface portion to the upper surface portion. And with
Each of the front upper thick portion and the rear upper thick portion partially seals the film sheet.
The front upper thick portion is folded over the surfaces of the front surface portion and the upper surface portion.
The rear upper thick portion is folded over the surfaces of the rear surface portion and the upper surface portion.
In the side view of the package, the front upper thick portion constitutes a substantially L-shaped angle that bends at an angle formed by the front surface portion and the upper surface portion, and the rear upper thick portion constitutes the rear surface portion. A package that constitutes a substantially L-shaped angle that bends at an angle formed by the upper surface portion.

Images