JP4844977B2 - Article holding and transporting device for overwrapping machine - Google Patents

Description

  The present invention relates to an article holding and transporting apparatus for an overwrapping machine that wraps a soft and easily deformable food such as steamed bread with a film sheet.

  An overwrapping device has been proposed that automatically wraps food that is soft and easily deformed, such as a bun, instead of a conventional square wrapping form, with a thin film sheet so that the entire food is in close contact (for example, (See Patent Document 1). In the overwrapping apparatus of Patent Document 1, a film sheet is supplied and placed on the upper surface of the carrier that forms the article accommodating portion, and the food is pushed into the article accommodating portion from above the film sheet to accommodate the outside of the food. After the film sheet is covered so as to be in close contact, the sheet edge extending outside the article storage portion is folded to the upper surface side of the food, and the folded portion is sealed to wrap the food.

In the overwrap packaging apparatus, in order to prevent the film sheet supplied and mounted on the upper surface of the transport body from being displaced during transport, air holes are formed in the transport body, and the film sheet is supplied and placed on the transport body. The film sheet is sucked and held on the upper surface of the transport body by an air suction force acting through the vent hole. In addition, by separately forming an air ejection hole in the carrier, before folding the sheet edge extending outside the article storage unit, air is ejected upward and the sheet edge is raised upward, so that the polyethylene material Even if it is a thin and flexible film, the structure which can be folded favorably along the upper surface of the food is employed.
Japanese Patent No. 3742988

  In the overwrap packaging apparatus disclosed in Patent Document 1, the film sheet placed so as to cover the article storage unit is sucked and held by the air suction force on the upper surface of the transport body, and the food is pushed into the article storage unit and stored. Thus, the film sheet can be brought into close contact. However, when trying to wrap a food having a plurality of corners that are soft and easily deformed, such as a triangular pillar-shaped or square pillar-shaped steamed bread, for example, with a thin and stretchable film such as a stretch film of about 12 μm of polyethylene. In addition, since the film sheet is sucked and held on the upper surface of the transport body, the load applied to the food that is pushed into the article accommodating portion together with the film sheet is increased, the corner portion is excessively deformed, and the commercial value is significantly reduced. There was a problem. Therefore, it is difficult to satisfactorily package with such an overwrap packaging apparatus disclosed in Patent Document 1, and packaging of food that is soft and easily deformed relies on manual work.

  Further, in the overwrap packaging apparatus, a suction means and a ventilation hole for providing an air suction force by separately providing an air hole for sucking and holding the film sheet and an ejection hole for raising the edge of the sheet in the conveyance body In addition, since the communication positions of the air ejection means for performing air ejection and the ejection holes are set to be different, it is pointed out that the formation positions of the air holes and the ejection holes are limited.

  That is, the present invention has been proposed in view of the above-described problems inherent in the prior art described above, and it is proposed to suitably solve this problem, and suppresses deformation of a soft and easily deformable food such as steamed bread. Another object of the present invention is to provide an article holding and transporting apparatus for an overwrapping machine that can automatically and satisfactorily wrap a film in close contact with a food surface.

In order to overcome the above-mentioned problems and achieve the intended object, an article holding and transporting device for an overwrapping machine of the invention according to claim 1 of the present application,
In the overwrapping machine in which the edge of the film sheet covering the lower and side surfaces of the food having a three-dimensional shape is folded so as to be polymerized on the upper surface of the food and the food is covered with the film sheet along the surface,
A transport body provided with an article housing portion formed in a shape along the surface of the food and recessed so that the upper portion opens is disposed at predetermined intervals, and on the transport body so as to cover the upper opening of the article housing portion. Conveying means for conveying the film sheet supplied to and mounted on,
A vent hole which is opened on the film sheet mounting surface in the transport body and functions to suck and eject air;
Air that sucks and holds the film sheet on the mounting surface of the transport body through the vent hole in the transport body moving section from above the film sheet supplied and mounted on the transport body until the food is stored in the article storage unit. Suction means;
In the movement section of the transport body after the food is stored in the article storage unit, air is ejected from the vent hole, and air ejection means for raising the edge of the film sheet extending outside the article storage unit,
When the food comes into contact with the film sheet at least at the position where the food is supplied, the food is supplied so that the air suction force of the film sheet by the vent hole when the food is stored in the article storage unit is weakened. The air suction force is set to be weaker than the film suction force to the transporting body by the vent holes before the position where the air hole is formed.
According to this, when the transport body moves to the article supply station, the film sheet is reliably sucked and held without being displaced or turned up and the food is pushed into the article storage section. The air suction force acting on the sheet is weak, and the load applied to the food can be reduced while maintaining the film sheet in a properly stretched state. That is, even a stretch film for food packaging of about 8 to 15 μm, for example, is able to suppress deformation of soft and easily deformed foods having corners such as steamed bread, and the film can be applied to the food surface without being inferior to manual packaging. Good automatic packaging in close contact. In addition, since the air hole that causes air suction force to act on the film sheet is also used as a hole for air ejection, it is possible to appropriately hold the film drawn into the article accommodating portion when the food is pushed into the article accommodating portion. The vent hole can be provided at a proper position where the sheet edge portion extending outside the article accommodating portion after being accommodated in the article accommodating portion can be reliably raised.

The gist of the invention according to claim 2 is that a contact surface with the film sheet in the transport body is subjected to an adhesion suppression process for suppressing adhesion with the film sheet.
According to this, since the adhesion between the film drawn into the article storage section and the contact surface of the transport body can be suppressed when the food is pushed into the article storage section, the film has self-adhesiveness such as a stretch film. However, it is possible to reduce the load applied to the food without generating a tensile resistance against the film and to suppress the deformation of the food.

The gist of the invention according to claim 3 is that the food is soft and easily deformed, has corners, and the film sheet is a stretch film for food packaging having a thickness of 8 to 15 μm.
According to this, for example, with a thin stretch film having a thickness of about 12 μm, it is possible to obtain a package in which the film is in close contact with the food surface without the corner portion being deformed as the commercial value is lowered.

In the invention which concerns on Claim 4, the formation space | interval of the said ventilation hole formed in a mounting surface close to the corner | angular_part accommodation space part of the foodstuff in the said article | item storage part is formation of the ventilation hole formed in another site | part. The gist is that it is set closer than the interval.
According to this, the air suction force which acts through the vent hole provided more per unit area than the other site | parts about the film sheet drawn from multiple directions into the corner | angular part accommodation space part which accommodates the corner | angular part of foodstuffs Since the food can be pushed into the article container while maintaining the proper tension by the film, the film in the corner of the food is inadvertently released during the pushing, so the film at the corner It is possible to prevent the occurrence of blurring. In addition, after pushing the food into the article storage part, when raising the edge of the film extending out of the storage part, the sheet edge gathered near the corner is more than the other part. A large amount of air can be ejected from a large number of vent holes provided per unit area, so that it can be reliably started up.

  According to the article holding and transporting apparatus of the overwrapping machine according to the present invention, for example, even a soft and easily deformable food such as steamed bread can suppress the deformation and automate the packaging in which the film adheres to the food surface. .

  Next, with reference to the accompanying drawings, an example is given for an article holding and transporting device of an overwrapping machine suitable for steamed bread, sponge cake, sandwiches, and other soft and easily deformable breads and cakes. Will be described below. In addition, an Example demonstrates the case where the triangular column-shaped steamed bread in which an upper surface and a lower surface exhibit triangular shape is packaged.

  FIG. 1 shows a schematic configuration of an article holding and transporting apparatus for an overwrapping machine according to an embodiment, which is disposed below a film supply station where a film supply apparatus (not shown) is disposed. Conveying means 10 is provided. The transport means 10 includes a drive mechanism composed of a chain and a sprocket, and a plurality of transport bodies 14 are installed at predetermined intervals in the traveling direction between a pair of endless chains 12, 12 spaced apart in the width direction as shown in FIG. The sprocket is rotationally driven by a drive motor (not shown) so that the transport body 14 is moved at a predetermined speed together with the endless chains 12 and 12. In the conveying means 10, the rectangular film sheet f delivered from the film supply device is placed and held on the conveying body 14, and the food 16 supplied so as to be pushed into the conveying body 14 from above the film is filmed. The sheet f is configured to be conveyed downstream along with the sheet f. As the film, a stretch film having a self-adhesive property made of polyethylene, for example, around 12 μm, is used. If necessary, the film has a thickness of about 8 to 15 μm, preferably 10 to 13 μm. used. Examples of the film material include vinyl chloride, polyolefin-based polypropylene, and other various materials, and it is possible to use a food packaging stretch film in which films made of these various materials are monolayered or laminated.

  An article supply station, a film standing station, a film folding station, a sealing station, and a discharge station are provided in this order from the upstream side to the downstream side in the article conveyance direction of the film supply station. Drive control is performed so that the carrier 14 is intermittently stopped at each station. The conveyance means 10 of the embodiment is set to intermittently stop the conveyance body 14 at the arrangement pitch of the conveyance bodies 14, and at the intermittent stop, the two conveyance bodies 14 and 14 face the article supply station, and the film supply station One transfer body 14 faces each of the film standing station, the film folding station, the sealing station, and the discharging station (see FIG. 1). In the embodiment, one station is set between the film supply station and the article supply station.

  As shown in FIG. 2, each transport body 14 includes a main body 18 connected and fixed to the endless chains 12 and 12, and a housing member 20 detachably disposed on the main body 18. The upper surface of the member 20 is configured to be located at the same level. A through hole 48 having a triangular shape in plan view and extending in the vertical direction is formed at a substantially central position of the housing member 20 in correspondence with the shape of the food 16. As shown in FIG. 2, the main body 18 is provided with a lower surface support member 22 that faces the lower side of the through hole 34 when the accommodation member 20 is mounted. The inner wall 20c that forms the hole 34 defines a concave article storage portion 24 that opens upward in a shape that conforms to the three-dimensional shape of the food product 16 so that the food product 16 is received and held in the article storage portion 24. (See FIG. 5). In the embodiment, the article accommodating portion 24 is a substantially triangular prism-shaped hollow portion for accommodating the triangular prism-shaped food 16 having the corners 16a facing outward, and the lower surface of the food 16 is a film on the upper surface of the lower surface support member 22. While being held via the sheet f, the outer side surface corresponding to each side of the food 16 can be held via the film sheet f by the inner wall 20c forming the through hole 34 in the housing member 20.

  The article accommodating portion 24 has a corner accommodating space 26 in which the corner 16a is accommodated at a position corresponding to each corner 16a of the food 16 when the food 16 is accommodated in the article accommodating portion 24. Is formed. As shown in FIG. 5, the corner accommodating space 26 is configured to be a void formed so as to expand outward from the corner 16 a of the food 16 accommodated in the article accommodating portion 24. It is. The corner portion accommodating space portion 26 is a substantially cylindrical hollow portion set so as to expand from the top of each corner portion 16 a toward the outer side of each corner portion 16 a with an arc having the same radius. It opens in a circular arc shape at the top. A portion where the upper surface serving as the film placement surface of the housing member 20 and the inner wall 20c forming the through-hole 48 intersect (the upper opening edge of the article housing portion 24) is formed as a curved surface, reducing the pull-in resistance of the film sheet f. It is configured to prevent the occurrence of tearing or tearing of the film. Further, the surface of the housing member 20 and the upper surface of the main body of the transport body 14 such as the contact surface with the film sheet f are subjected to adhesion suppression processing such as pear fabric processing or fluororesin coating, and self-adhesion of a film made of stretch film The film sheet f can be prevented from sticking to the transport body 14 by the action. In addition, the corner | angular part 16a of the foodstuff 16 refers to the part along the ridgeline which connects each vertex of the upper surface of this foodstuff 16, and a lower surface.

  The lower surface support member 22 is formed in a shape along the shape of the lower surface of the food 16 and is disposed in the main body 18 of the transport body 14 so as to move up and down in the article storage unit 24. Further, the lower surface support member 22 is held at an article support position that supports the lower surface of the food 16 at a predetermined height position from the film supply station to the seal station, and is operated by a discharge device described later at the discharge station, The packaged food 16 is configured to be pushed out from the article storage unit 24. In the state where the lower surface support member 22 is held at the article support position, the depth dimension of the article storage section 24 is set slightly longer than the height dimension of the food 16 and the food stored in the article storage section 24. When the sheet edge portion is folded on the upper surface of the food 16, the film is tightly folded on the surface of the food 16 without suppressing the deformation of the food 16 and damaging the food 16.

  As shown in FIG. 2, the main body 18 of the transport body 14 includes a main member 50 in which the housing member 20 is disposed, and front and rear edges of the film sheet f that are positioned in front and rear of the main member 50 in the article transport direction. It is configured to be divided into three auxiliary members 52 and 52 that support the portion. In the embodiment, one auxiliary member 52 located between the main members 50 and 50 of the transport bodies 14 and 14 adjacent in the article transport direction also serves as the auxiliary members of the transport bodies 14 and 14 on both sides. Each conveyance body 14 may be configured to include two auxiliary members 52 and 52, respectively. Then, the main body 18 of the transport body 14 is divided into three parts, and the individual members 50, 52, 52 are installed between the endless chains 12, 12, so that the transport body 14 is rotated to the upper carrier side and the lower return side. The diameter of the sprocket to be moved can be reduced, and the enlargement of the apparatus can be suppressed.

  Each auxiliary member 52 in the main body 18 of the transport body 14 is formed in a hollow box shape, and an upper plate 52a that is a placement surface on which the film sheet f of the auxiliary member 52 is placed, and in the internal space of the auxiliary member 52. A plurality of communicating air holes 18 a are formed, and the lower plate 52 b of the auxiliary member 52 is spaced apart at a predetermined interval in the moving direction of the transport body 14 at a position spaced apart in the width direction, and enters the internal space of the auxiliary member 52. A communication hole 18b that communicates is formed (see FIGS. 2 and 4). As shown in FIG. 2, the air holes 18 a are formed along the front edge and the rear edge in the article conveying direction of the auxiliary member 52, and the air holes near the one edge are the front edge of the film sheet f. It functions to apply an air suction force to the edge portion, and a group of vent holes located close to the other end edge functions to apply an air suction force to the rear end edge portion of the film sheet f. The housing member 20 is formed in a hollow box shape, and the internal space of the housing member 20 is located in a portion excluding the formation position of the article housing portion 24 on the upper plate 20d that is a placement surface on which the film sheet f is placed. The lower plate 20e is spaced apart at a predetermined interval in the movement direction of the transport body 14 at a position spaced apart in the width direction corresponding to the communication hole 18b of the main body 18. Thus, a communication hole 20b communicating with the internal space of the housing member 20 is formed (see FIGS. 2 and 4).

  The formation interval of the vent holes 20a formed in the portion close to the corner accommodating space portion 26 is set to be closer than the formation interval of the vent holes 20a formed in the other portions. The air suction amount and the jet amount acting on the film sheet f drawn into the portion accommodating space portion 26 or the sheet edge extending outward from the corner portion accommodating space portion 26 can be made to act more per unit area. It has become. Note that when the first ejection chambers 36, 36, which will be described later, communicate with the communication holes 20b, 20b as the transport body 14 moves, the ejection power of the air ejected from each of the vent holes 20a is substantially the same, and the articles are accommodated. The sheet edge extending from the portion 24 rises sequentially from the open end side that is separated from the article accommodating portion 24.

  A plurality of elongated holes 54 that can communicate with the communication hole 18 b of the main body 18 and the communication hole 20 b of the housing member 20 are provided on the passage of the transport body 14 along the moving direction of the transport body 14. A plurality of chambers 28, 30, 32, 34, 36, and 38 are arranged side by side in the movement direction corresponding to each communication hole group arranged in the movement direction. In the embodiment, as shown in FIGS. 3 and 4, six chambers are provided for each communication hole group, and the first suction chamber 28, the second suction chamber 30, and the third suction chamber 32 are sequentially arranged from the upstream side. , Referred to as fourth suction chamber 34, first ejection chamber 36, and second ejection chamber 38. In the first to fourth suction chambers 28, 30, 32, and 34, the suction ports of the first air distributor 56 connected to the first blower 40 as an air suction source are respectively connected via independent pipelines. It is connected. In addition, the first and second ejection chambers 36 and 38 have pipe systems in which the discharge ports of the second air distributor 60 connected to the second blower 42 as an air ejection source via the air filter 58 are independent of each other. Connected through.

  The first suction chamber 28 and the second suction chamber 30 face the film supply station and its downstream station, and the third suction chamber 32 and the fourth suction chamber 34 face the article supply station, and the film supply station The communication holes 18b and 20b of the carrier 14 that intermittently stop or pass through the article supply station communicate with the corresponding suction chambers 28, 30, 32, and 34 through the openings 54 (see FIG. 4). To the article supply station, an air suction force is configured to act through the vent holes 18a and 20a of the transport body 14. That is, the film sheet f supplied from the film supply apparatus is sucked and held on the upper surface of the transport body 14 by the air suction force acting through the vent holes 18a and 20a of the transport body 14 (up to the article supply station). From the upper side of f, the food product 16 can be transported until the food 16 is stored in the article storage unit 24). In addition, the first ejection chamber 36 faces the film standing station, and the second ejection chamber 38 faces the film folding station, and each communication hole 18b of the carrier 14 intermittently stops or passes through the film standing station and the film folding station. 20b communicates with the corresponding ejection chambers 36 and 38 through the opening 54 (see FIG. 4), and the film standing station and the film folding station (the movement of the transport body 14 after the food 16 is accommodated in the article accommodating portion 24). In the section), the air is ejected upward from the air holes 18a, 20a of the transport body 14. That is, when the food 16 is pushed into the article accommodating portion 24 from above the film sheet f, the sheet edge extending outside the article accommodating portion 24 is raised upward by the air blown from the vent holes 18a and 20a. It has become. In the embodiment, the first blower 40 and the suction chambers 28, 30, 32, and 34 constitute an air suction means, and the second blower 42 and the ejection chambers 36 and 38 constitute an air ejection means.

  When the communication holes 18b, 20b communicate with the first to fourth suction chambers 28, 30, 32, 34, the air suction force acting through the vent holes 18a, 20a is set to be different. That is, the first and second suction chambers 28 and 30 communicate with the third and fourth suction chambers 32 and 34 by the air suction force acting through the vent holes 18a and 20a when the communication holes 18b and 20b communicate with each other. The air suction force when the holes 18b and 20b communicate with each other is set to be small. In the embodiment, a regulating valve (not shown) as a suction force adjusting means is disposed in the first air distributor 56 provided between the third and fourth suction chambers 32 and 34 and the first blower 40. The air suction force is adjusted by the control valve so as to satisfy the above-described conditions. The suction holding force of the film sheet f on the upper surface of the transport body 14 by the first and second suction chambers 28 and 30 is determined by the movement of the transport body 14 without deforming the film sheet f by excessive suction. What is necessary is just to set to the moderate value of the grade which does not shift | deviate. The means for changing the air suction force for sucking and holding the film sheet f on the transport body 14 is not limited to that performed on the side of the air suction means such as a control valve. For example, the switching means according to the position of the transport body 14 is used. As long as the air suction force acting on the film sheet f through the air holes 18a and 20a changes, such as changing the opening size of the air holes 18a and 20a, various other methods can be adopted.

  Air jetting means 44 for blowing air from the downstream side in the transport direction is disposed toward the sheet edge that is raised by the air jetting unit and faces forward in the transport direction at the film standing station. Specifically, the article accommodating portion 24 is formed so that one side of the article accommodating portion 24 that accommodates the triangular prism-shaped food 16 extends obliquely in the width direction on the downstream side in the article conveying direction. By blowing air from the air injection means 44 toward the edge of the sheet rising upward, it is possible to carry out auxiliary folding in which the film extension is bent so as to be pressed against the upper surface of the food 16. ing.

  In the film folding station, the sheet edge extending from the outer peripheral edge of the food 16 accommodated in the article accommodating portion 24 is folded along the upper surface of the food, and the film folding apparatus temporarily folds the film folded by the film folding apparatus. A seal is applied. In addition, the folded and overlapped portion of the temporarily sealed film at the downstream sealing station is completely sealed, and then the food 16 pushed out from the article accommodating portion 24 by operating the lower surface support member 22 at the discharge station, It is configured to be conveyed to the next process by the discharge conveyor 46.

(Effects of Example)
Next, the operation of the article holding and transporting device of the overwrapping machine according to the embodiment will be described.

  A rectangular film sheet f is supplied from the film supply device to the carrier 14 intermittently stopped at the film supply station. The communication holes 18b and 20b of the transport body 14 located at the film supply station communicate with the first suction chamber 28, and the film sheet f supplied to the transport body 14 passes through the vent holes 18a and 20a of the transport body 14. By the strong air suction force acting in this manner, the air is sucked and held on the transport body 14 so as to cover the upper opening of the article accommodating portion 24 on the transport body 14.

  While the transport body 14 that sucks and holds the film sheet f moves from the film supply station to the article supply station, the second suction chamber 30 communicates with the communication holes 18b and 20b to excessively suck the film sheet f. The film sheet f is sucked and held on the transport body 14 by an appropriate air suction force that does not shift and does not rotate up. Accordingly, the film sheet f is displaced and the position with respect to the article accommodating portion 24 is changed while the transport body 14 is moved from the film supply station to the article supply station, or the film sheet f is turned up and self-adhesive. The problem that stretch films having a thickness overlap each other is prevented.

  When the conveyance body 14 on which the film sheet f is sucked and held is intermittently stopped at the article supply station, the communication holes 18b and 20b of the conveyance body 14 communicate with the third suction chamber 32 or the fourth suction chamber 34, and the ventilation holes The film sheet f is sucked and held on the transport body 14 by a weak air suction force acting via 18a and 20a. In this article supply station, the food 16 is turned upside down from the upper side of the film sheet f by pushing the food 16 in an inverted state (an attitude in which the upper surface of the product as a steamed bread faces downward) into the article container 24. The lower surface and the side surface along the removed article accommodating portion 24 are covered with the film sheet f, and the edge of the film sheet f extends outward from the article accommodating portion 24 by a predetermined length (see FIG. 5). At this time, the film sheet f is drawn into the article storage unit 24 together with the food 16 in a moderately stretched state, and the film covering the lower surface and the side surface of the food 16 in the article storage unit 24 is not bumped with the food 16. It will be in close contact. Moreover, the air suction force acting on the film sheet f in the article supply station is smaller than the value when the transport body 14 moves, and the moderate air suction force that can suppress the deformation of the soft and easily deformable food 16 such as steamed bread. Therefore, the load applied to the food 16 is also reduced. That is, when the food 16 comes into contact with the film sheet f, since the air suction force is weak, particularly the corner portion 16a of the soft and easily deformable food 16 is deformed as the commercial value is lowered. Is prevented. Furthermore, since the film contact surface of the carrier 14 is subjected to a self-adhesion suppressing process, even a film having a self-adhesive property such as a stretch film can reduce the resistance to drawing into the article storage unit 24, and the food 16 The load applied to the corner 16a can be further reduced.

  In addition, in the corner | angular part accommodation space part 26 in which the corner | angular part 16a of the foodstuff 16 in the article | item accommodating part 24 is accommodated, since the inner wall of the accommodating member 20 is spaced apart from the accommodated corner | angular part 16a, this structure. Therefore, when the film sheet f is drawn into the corner accommodating space 26 together with the corner 16a, the load applied to the corner 16a is reduced.

  While the transport body 14 in which the food 16 is stored in the article storage section 24 extends from the article supply station to the film standing station, the first ejection chamber 36 communicates with the communication holes 18b and 20b, and the ventilation holes 18a and 20a. Then, air is ejected upward, and the edge of the sheet extending outward from the article accommodating portion 24 is raised upward. Further, the air holes 20a in the vicinity of the corner accommodating space 26 in the transport body 14 are formed more densely than other portions, and the sheet edges gathered near the corner 16a are per unit area. Thus, it can be surely started up by the air blown more than other parts. Further, in accordance with the timing when the sheet edge is raised, air is sprayed from the air ejecting means 44 toward the sheet edge extending from the downstream side of the article storage unit 24, and forward in the conveying direction. The sheet edge portion that rises from one side in the triangular prism-shaped food 16 that is positioned is bent so as to be pressed against the upper surface of the food 16.

  In addition, since the ejection amount of the air ejected from each vent hole 20a when the first ejection chamber 36 communicates with the communication holes 20b and 20b is substantially the same, the sheet edge extending from the article accommodating portion 24 is The sheet edge rises sequentially from the side away from the article storage unit 24, and the sheet edge is reliably raised.

  The film folding device is operated in accordance with the timing at which the article accommodating portion 24 of the transport body 14 in which the food 16 is accommodated arrives at the film folding station, and is raised from the outer peripheral edge of the food 16 by a plurality of folding pieces. The edge of the film sheet f is folded along the upper surface of the food 16. At this time, the communication holes 18b and 20b of the conveyance body 14 communicate with the second ejection chamber 38, and air ejection from the vent holes 18a and 20a continues, so that the sheet edge is maintained in a state of rising upward. Therefore, the film is surely folded. After the film is folded, a temporary seal is applied to the film folding overlapping portion, and the folded state of the sheet edge is maintained. Since the air discharged from the second blower 42 is supplied to the ejection chambers 36 and 38 through the air filter 58, the air ejected from the vent hole 20a and sprayed to the sheet edge is as follows. It is clean and there is no risk of film fouling.

  The package 16 covered with the thin film sheet f in close contact with the soft and easily deformable food 16 having the corners 16a, with the food folding 16 temporarily moved to the sealing station and the film folding overlapped portion sealed. The body is obtained. Next, when the transport body 14 for transporting the food 16 reaches the discharge station, the lower surface support member 22 moves toward the upper opening in the article storage section 24 to push out the packaged food 16 from the article storage section 24. The food 16 (packaging body) is carried out by the discharge conveyor 46.

  In this way, the air suction force acting on the film sheet f at the article supply station is more than the air suction force that can prevent the film sheet f from being displaced on the transport body 14 moving from the film supply station to the article supply station. Since it set small, the load added to the corner | angular part 16a when pushing the foodstuff 16 into the goods accommodating part 24 can be made small, and a deformation | transformation of the corner | angular part 16a can be suppressed. Accordingly, even when the food 16 is a soft and easily deformable food made of steamed bread, sponge cake, sandwich, various breads and cakes, the corner 16a of the food 16 is prevented from being deformed, and the finished state is inferior to manual packaging. Automatic packaging is possible so that In addition, since the film sheet f drawn into the article storage unit 24 together with the food 16 is maintained in a tensioned state by a weak air suction force, it can be packaged in close contact with the food 16 without any looseness.

  Further, since the formation interval of the air holes 20a close to the corner portion accommodating space portion 26 in which the corner portion 16a of the food 16 is accommodated is set closer than other portions, the food item 16 is pushed into the article accommodating portion 24. In this case, the film sheet f drawn into the corner accommodating space 26 can be held in a properly stretched state so as to be narrowed from multiple directions at once, and the film is brought into close contact with the deformation of the corner 16a in the food 16 being suppressed. Can be. Further, when the sheet edge extending from the article accommodating portion 24 is raised, a plurality of sheet edges gathered near the corner 16a are provided per unit area more than the other portions. Since a large amount of air can be ejected from the air and it can be reliably started up, the subsequent folding of the sheet edge can be performed reliably.

  Since the air holes 18a and 20a formed in the transport body 14 are configured so as to serve as holes that act on air suction force to the film sheet f and holes that eject air to the sheet edge, It is not necessary to shift the arrangement positions of the suction chambers 28, 30, 32, 43 and the ejection chambers 36, 38. That is, the suction chambers 28, 30, 32, 43 and the ejection chambers 36, 38 are arranged in alignment in the article transport direction, and the communication holes 18b are provided at positions where they can communicate with the chambers 28, 30, 32, 43, 36, 38. , 20b, the air holes 18a, 20a can be appropriately held after the food 16 is pushed into the article storage section 24, and after the film 16 is stored in the article storage section 24. The sheet edge portion extending to the outside of the article storage portion 24 can be provided at an appropriate position where it can be surely raised.

(Example of change)
The present application is not limited to the configuration of the above-described embodiment, and other configurations can be appropriately employed.
1. In the embodiment, the case where the food 16 has a triangular prism shape having corners facing outward has been described. However, the present invention can be applied to a food product having a plurality of corner portions such as a quadrangular prism shape.
2. In the embodiment, the control valve is mentioned as the suction force adjusting means for adjusting the air suction force acting on each suction chamber 28, 30, 32, 34. However, the pipe diameter is changed or the air suction source is provided separately. Other means may be employed.
3. In the embodiment, the article supply station is set as an intermittent stop position for two stations of the carrier 14, but the number can be arbitrarily set according to the processing capability of the apparatus, such as only one station or three stations. Can be set. Further, the conveyance body 14 may be continuously moved without being limited to intermittently stopping the conveyance body 14. When the transport body 14 is intermittently stopped, the apparatus can be made compact and simple, and when the transport body 14 is continuously moved, the working efficiency is increased.
4). In the embodiment, the four suction chambers 28, 30, 32, 34 and the two ejection chambers 36, 38 are described. However, the number of these chambers is from the film supply station to the article supply station. In addition, the number of arrangements according to the distance between the film standing station and the film folding station on the downstream side can be used.
5). In the embodiment, an air suction source for sucking and holding the film sheet f and an air ejection source for starting up the sheet edge are provided separately. However, exhaust of the first blower 40 as an air suction source is performed. It can be used for starting up the sheet edge. That is, when the exhaust of the first blower 40 is drawn into the ejection chambers 36 and 38 and the ejection chambers 36 and 38 and the communication holes 18 b and 20 b are in communication with each other, air is ejected upward from the vent holes 18 a and 20 a. It is possible to adopt a configuration that makes it happen.
6). In the embodiment, the housing member 20 is detachably disposed on the transport body 14. However, the housing member 20 may be formed integrally with the transport body 14.
7). In the embodiment, all the air holes 18a, 20a are configured to be used for both air suction and air jet, but some of the air holes 18a, 20a are formed by, for example, using two suction chambers and gas jet chambers. You may comprise only for either one of the suction | inhalation and ejection of air.

It is a schematic plan view which shows the conveyance means of the overwrapping apparatus which concerns on an Example. It is a principal part schematic plan view which shows the conveyance means which concerns on an Example in the state which the conveyance body has faced the downstream article supply station. It is a schematic plan view which shows the connection relation of the blower corresponding to the suction chamber and ejection chamber which concern on an Example. It is a principal part schematic side view which shows the relationship between the suction chamber and the ejection chamber which concern on an Example, and a conveyance body. It is a schematic plan view which shows the accommodating member which concerns on an Example in the state in which the foodstuff and the film sheet are accommodated in the goods accommodating part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Conveyance means, 14 Conveyance body, 16 Food, 16a Corner part 18a Vent hole, 20a Vent hole, 20d Upper plate (mounting surface), 24 Article accommodation part 26 Corner part accommodation space part, 28 1st suction chamber (air suction) means)
30 Second suction chamber (air suction means), 32 Third suction chamber (air suction means)
34 4th suction chamber (air suction means), 36 1st ejection chamber (air ejection means)
38 2nd ejection chamber (air ejection means), 40 1st blower (air suction means)
42 Second blower (air blowing means), 52a Upper plate (mounting surface), f Film sheet

Claims (4)

The edge of the film sheet (f) covering the lower and side surfaces of the food (16) having a three-dimensional shape is folded so as to be polymerized on the upper surface of the food (16), so that the food (16) is filmed along the surface. In an overwrapping machine covered with
A transport body (14) provided with an article storage section (24) formed in a shape along the surface of the food (16) and recessed so that the upper part opens is disposed at predetermined intervals, and an article storage section ( A transport means (10) for transporting the film sheet (f) supplied and placed on the transport body (14) so as to cover the upper opening of 24),
Vent holes (18a, 20a) that are opened on the mounting surface (20d, 52a) of the film sheet (f) in the transport body (14), and function to suck and eject air;
In the transporting body moving section from the upper side of the film sheet (f) supplied and placed on the transporting body (14) until the food (16) is housed in the article housing part (24), the vent holes (18a, 20a) Air suction means (28, 30, 32, 34, 40) for sucking and holding the film sheet (f) on the placing surface (20d, 52a) of the transport body (14) via,
In the moving section of the transport body (14) after the food (16) is stored in the article storage section (24), air is blown out from the vent holes (18a, 20a) to extend outside the article storage section (24). Air ejection means (36, 38, 42) for raising the edge of the film sheet (f) to be ejected,
At least the food (16) is supplied so that the air suction force of the film sheet (f) by the ventilation holes (18a, 20a) when the food (16) is stored in the article storage unit (24) is weakened. When the food sheet (f) comes into contact with the film sheet (f) at a position where the food sheet (f) comes into contact with the film (14) by the vent holes (18a, 20a) before the position where the food product (16) is supplied. An apparatus for holding and transferring an article of an overwrapping machine, characterized in that the air suction force is set to be weaker than the suction force.   The article holding of the overwrapping machine according to claim 1, wherein the contact surface of the transport body (14) with the film sheet (f) is subjected to an adhesion suppression process for suppressing adhesion to the film sheet (f). Transfer device.   The food (16) is soft and easily deformable, has corners (16a), and the film sheet (f) is a stretch film for food packaging having a thickness of 8 to 15 µm. Article holding and transfer device for the overwrapping machine.   The interval between the air holes (20a) formed in the placement surface (20d) in the vicinity of the corner portion accommodating space (26) of the food (16) in the article accommodating portion (24) is different from that of the other portion. The article holding and transporting device for an overwrapping machine according to claim 3, wherein the article holding and transporting apparatus is set more densely than the interval between the formed ventilation holes (20a).

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