JP2668321B2 - Film opening end bending packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for folding an open end portion of a film wound around a triangular flexible object to be packaged such as a sandwich, and for packaging the same.

[0002]

2. Description of the Related Art Conventionally, triangular sandwiches in which contents such as meat and vegetables are sandwiched between stacked breads are sold in a state of being packaged with a transparent film. Such a triangular flexible packaged product such as a sandwich is packaged by manually inserting the packaged product into a premade bag, folding the open end of the bag, and applying tape or the like. Is done. Also, for example, as disclosed in Japanese Utility Model Laid-Open No. 2-10202 and Japanese Utility Model Laid-Open No. 60-171805, a bag having an opening through which a sandwich can be inserted is used, and a bag is manually formed in advance. A semi-automatic packaging machine has been proposed in which a packed sandwich is supplied to a packaging machine so that the opening of the bag is automatically folded and sealed with a tape or the like.

[0003]

As described above, in either case of a manual or semi-automatic type packaging machine, since packaging is performed using a bag that has already been made, the external dimensions and thickness are different. It is necessary to manufacture bags of dimensions corresponding to each specification of the sandwich, which makes inventory management complicated and increases packaging costs. In addition, since the sandwiches are handmade, even if they have the same specifications, the outer dimensions are not uniform, and all sandwiches cannot always be tightly wrapped in bags made with a certain size, reducing product value There was a drawback to do.

Further, insertion of a sandwich into a bag (bag filling)
Since the work relies on manual labor, the work is troublesome and there is a problem that reduction of labor cost cannot be expected. In addition, when the sandwich is inserted into the bag, the sandwich may be out of shape or the contents may be rubbed against the inner surface of the bag to stain the bag, resulting in poor appearance and reduced commercial value.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned various problems inherent in the packaging of a flexible packaged object having a triangular shape such as a sandwich described above. Accordingly, it is an object of the present invention to provide a packaging device capable of always performing tight and good-looking packaging without causing the packaged product to lose its shape.

[0006]

[Means for solving the problems] To overcome the above-mentioned problems,
In order to achieve the intended purpose, the present invention relates to a device for folding an open end of a film formed into a tubular shape by being wrapped in a thickness direction around an object to be packaged having a triangular shape such as a sandwich. Wherein the inner angle of the packaged object is substantially 9
A surface on the bottom side facing the top set at 0 ° faces the transfer conveyor side in a position facing the top side of the packaged article supported and conveyed by the conveyor in a posture facing the transfer conveyor side, and the top is set as a reference. Bending means formed in a shape following the two inclined surfaces, and the bending means is loosely fitted to a support shaft arranged along the inclined surface so as to be rotatable and displaceable in the radial direction. A plurality of rollers, and the inclined surface of the article to be conveyed conveyed by the transfer conveyor is rubbed by a roller group of the folding means, so that the opening end of the film is bent along the inclined surface. It is characterized by

Further, in order to overcome the above-mentioned problems and achieve the intended purpose, another invention of the present application is to form a tubular shape by being wrapped around a triangular object to be wrapped such as a sandwich in the thickness direction. A device for bending an open end of a formed film for wrapping, wherein an inside angle of the object to be wrapped is about 90 °.
The surface on the bottom side facing the top is set in a position facing the top side of the article to be packaged supported and conveyed by the conveyor in a posture facing the transfer conveyor side, and the top side is used as a reference. It comprises a pair of bending means formed in a shape following the two inclined surfaces and can be deviated in a direction away from the inclined surfaces, and the pair of bending means are provided adjacent to the conveying direction of the packaged object, At least the folding means on the upstream side in the transport direction of the packaged object is configured to be horizontally movable in the transport direction and to move in the vertical direction with respect to the transport surface of the transport conveyor, and to be transported by the transport conveyor. The opening end of the film is bent along the inclined surface by rubbing the inclined surface of the package with the bending means.

[0008]

The object to be wrapped in which the tubular film is wrapped in the thickness direction is conveyed by the transfer conveyor with its bottom side surface being supported. The open end of the film wound around the packaged object conveyed by the conveyor is pressed against the inclined surface by a roller group of folding means provided so as to face the top of the packaged object, and It is folded along the inclined surface and is tightly packed.

[0009] A pair of bending means disposed adjacent to each other in the conveying direction has a slanted surface formed by a pair of folding means at the open end of the film wound on the package to be conveyed by the transfer conveyor. By being stroked, it is folded along the slope and tightly packed.

[0010]

EXAMPLES Next, a film opening end folding and packaging apparatus according to the present invention will be described below with reference to preferred examples. In the embodiment, the inner corner of the top of the packaged article is approximately 9
For an isosceles triangle-shaped sandwich set at 0 °, for convenience of description, a surface located on the long side of the sandwich is a “bottom surface” and a surface located on the short side is an “inclined surface”.
Also, the bottom side with respect to the top of the sandwich is referred to as “downward”, and the sandwich direction (thickness direction) is referred to as “side”.

[0011]

FIG. 1 is a side view showing a schematic configuration of a packaging machine in which a folding packaging apparatus according to an embodiment is adopted. In the packaging machine 10, a sandwich film 11 is provided with a band-like film F. A body winding packaging device 140 for body winding, a transfer conveyor 46 for transporting the sandwich 11 packaged and wound by the packaging device 140 to the downstream side, and a film for bending and sticking the open end of the film 13 wound around the sandwich 11 It is basically configured by a folding and packaging device 160.

[0012]

[Body packaging device]

[Supply Conveyor] On the upstream side in the conveying direction of the sandwich 11 in the packaging machine 10, a body-wrap packaging device 140 is provided.
Is provided, and the conveyor 1
4, the sandwich 11 is configured to be supplied to a stretched portion of the band-shaped film F described later. That is, as shown in FIG. 2, a pair of frames 15, 15 separated from each other in a direction intersecting the transport direction are provided on a machine frame 12 of the packaging machine 10, and a driven pulley 16 is provided between upstream ends of the frames 15, 15. Are rotatably supported. Further, a guide plate 17 is provided between the downstream ends of the frames 15, 15, and an endless transport belt 18 wound around the downstream end of the guide plate 17 and the driven pulley 16 forms a frame 15, 15. 15 around a drive pulley 19 rotatably supported at an appropriate position (see FIG. 3). The driving pulley 19 is intermittently driven by driving means (not shown),
8 is configured to intermittently convey the sandwich 11 placed thereon. In addition, between the driven pulley 16 and the guide plate 17, the bed 2 supporting the transport belt 18 from below is provided.
0 is provided between the frames 15 and 15. Further, reference numeral 21 denotes a tension roller that applies tension to the transport belt 18.

A positioning table 22 is disposed between the frames 15 and 15 downstream of the position where the driven pulley 16 is disposed so as to face above the conveyor belt 18 without interference. As shown in FIG. 2, a triangular recess 22a is formed. And the recess 22
a, the sandwich 11 is placed so that the top side (top side) faces the upstream side, so that the sandwich 11 is located at the center of conveyance of the conveyance belt 18. .

[0014]

[About the Pushing Plate] As shown in FIG. 2, guide rods 23 along the transport direction are arranged at positions sandwiching the supply conveyor 14 of the machine frame 12, and each guide rod 23 has an outer crossing the transport direction. In the direction (in the direction away from the supply conveyor 14), two cylinders 24 are provided slidably oriented to the two piston rods 24a.
Each cylinder 24 is connected to a rod 25 linked to a cam (neither is shown) that is rotationally driven by a driving means such as a motor, through which the cylinder 24 reciprocates along the guide rod 23. It is configured to be.
The cylinder 24 may be reciprocated along the guide rod 23 by another cylinder.

The piston rod 24 of each cylinder 24
A bracket 26 is disposed on each of the brackets a and 24a, and a pushing plate 27 is disposed at a position facing the upper side of the transport belt 18 of the bracket 26 so as to be adjustable in position. As shown in FIG. 5, the pushing plate 27 includes a pushing portion 27a along the inclined surface of the sandwich 11, and a drawer portion 27b formed at a downstream end of the pushing portion 27a in a direction perpendicular to the carrying direction. And a support portion 27c bent at the upstream end of the pushing portion 27a in parallel with the drawer portion 27b. The support portion 27c is provided on the bracket 26 via the support portion 27c. Then, the sandwich 11 transported by the transport belt 18 is supplied to the supply conveyor 14.
Light emitting element 120a and light receiving element 12
0b, the cylinders 24, 24 are urged in the direction of retracting their piston rods 24a, 24a to push the opposing pushing plates 27, 27 at the timing detected by the detecting means 120 consisting of 0b. Part 27a,
27a are brought into contact with the corresponding inclined surfaces of the sandwich 11 in close proximity to each other. Next, the cylinders 24, 24 are rotated at the same speed in synchronization with the intermittent running of the conveyor belt 18.
Is moved downstream along the guide rods 23, 23, and as shown in FIG. 6, the sandwich 11 is moved by the conveyor belt 18 and the push plates 27, 27 toward the extended portion of the strip film F (on the conveyor). At the downstream side).

As shown in FIG. 5, the drawer portion 27b projects slightly from the bottom surface of the sandwich 11 to the downstream side or at the same position with the pushing portion 27a in contact with the inclined surface of the sandwich 11. It is set to face. Thereby, when the band-shaped film F is wound around the sandwich 11, the drawn-out portion 27b is
, The deformation of the bottom surface of the sandwich 11 due to the drawing resistance of the film F is prevented. Further, the support portion 27c is positioned so as to face a position which is the same as the top of the sandwich 11 or slightly protrudes upstream. In addition, the level of the upper and lower ends of the pushing plate 27 itself is sandwich 1
1 is set to be substantially the same level as both ends in the thickness direction (upper and lower ends in the height direction on the conveyor), and while the band-shaped film F is wound around the sandwich 11 and the film F is cut with a seal. The sandwich 11 is supported by the pushing plates 27, 27 from both sides to prevent the sandwich 11 from being crushed by the film F.

[0017]

[About the supply mechanism of the belt-like film] A support frame 28 is erected on the machine frame 12, and a roll holder 29 is provided on the support frame 28 so as to face above the supply conveyor 14 as shown in FIG. It is arranged to be rotatable.
This roll holder 29 contains the sandwich 11 to be packed.
Transparent film F set wider than the length of the base
Is wound so as to be freely inserted and removed. And the belt-shaped film F of the film roll 30 is:
Feeding roller 32 driven to rotate by a driving motor 31
And the supply conveyor 14 via a plurality of guide rollers 33 and tension rollers 34.
Is supplied downward from above so as to intersect with the transport direction on the downstream side of. A film winding roller 36, which is rotatably driven by a drive motor 35, is rotatably supported at a position facing the lower side of the supply conveyor 14 in the machine frame 12, and the strip film F supplied to the downstream side of the supply conveyor 14 is rotatably supported. Are the tension roller 37 and the guide roller 3
The film is wound around the film winding roller 36 via the roller 8 and is held in an expanded state on the downstream side of the supply conveyor 14.

The guide roller 38 provided in the film path below the supply conveyor 14 is provided with a pulse discarding means 40 comprising a slit disk for counting the film supply amount and a photoelectric sensor or the like. . After the sandwich 11 is pressed against the band-shaped film F and the film F is wound around the band, the band-shaped film F is sealed and cut on the upstream side in the transport direction of the sandwich 11 (blown seal).
Then, in a state where the film take-up roller 36 is rotated and the film is being wound by the drive motor 35 starting to rotate, the pulse transmission means 40 When the number of pulses for a predetermined pulse is input, the drive motor 35 is set to stop rotating and stop film winding. As a result, the cut seal portion of the strip-shaped film F is
By spreading the belt-like film F on the downstream side of the supply conveyor 14 in a state where it is moved to a position not to be used for packaging the next sandwich 11, it is possible to adopt a packaging form in which one seal portion faces the top side of the sandwich 11. .

Tension roller 3 provided below
7 is always held at the lower position shown in FIG. 4 and rises when the strip-shaped film F is pulled out and wound around the sandwich 11, and after the strip-shaped film F is cut off with a seal, the air cylinder 41 is forcibly forced. Is lowered to a fixed position below. In addition, the tension roller 34 provided above is always held at the lower origin position shown in FIG.
It is configured to rise when it is wound around. Further, an origin sensor 42 for detecting the origin position of the roller 34 is provided in the support mechanism of the tension roller 34. Then, after the sealing of the strip film F is cut, the tension roller 37 is forcibly lowered by the air cylinder 41 and a predetermined amount of the strip film F is wound by the winding roller 36, and the feeding roller 3 is rotated.
When the origin sensor 42 detects that the tension roller 34 has been lowered from the raised position to the origin position by the belt 2 being rotated and the belt-shaped film F being pulled out from the film roll 30, the feeding roller 32 is stopped. Has become. As a result, the upper and lower tension rollers 34,
Between 37, the belt-like film F for the next packaging is stretched and held.

[0020]

[About the fusing sealer of the band-shaped film] As shown in FIG. 4, a pair of fusing sealers 43 and 44 heated up and down by an appropriate built-in heater can be moved up and down further downstream of the expanded portion of the band-shaped film F. It is arranged. Then, the supply conveyor 14 and the pushing plates 27, 2
After the sandwich 11 conveyed to a position beyond the film extending portion by the gripper 7 is gripped by the gripping member 53 of the transfer conveyor 46 described later, the band-shaped film F is sandwiched by the two sealers 43 and 44 approaching each other. The seal 11 is configured so that the seal is cut at a position approximately half the thickness direction of the sandwich 11 on the upstream side in the supply direction. The sandwich 11 sandwiching the sealers 43 and 44
Guides 45, 45 are disposed on both sides in the conveying direction of the sheet F. When the seals are cut by the sealers 43, 44, the film F is sandwiched between the guides 45, 45 which are opposed to each other vertically. In addition, between the extended portion of the band-shaped film F and the position where the fusing sealers 43 and 44 are provided, the guide rollers 121 and
121 is provided, and the belt-like film F drawn by the sandwich 11 conveyed by the supply conveyor 14 and the pushing plates 27, 27 is guided downstream without contacting the sealers 43, 44. is there.

[0021]

[Transport Conveyor] As shown in FIG. 1, a transfer conveyor 46 is provided downstream of the supply conveyor 14 for transporting the sandwich 11 wrapped and wound by the band-shaped film F while gripping the sandwich 11 from the thickness direction. The transfer conveyor 46 includes a pair of side plates 47,
Drive shaft 4 at the upstream end and the downstream end
8 and a driven shaft 49 are rotatably supported by a pivot. Two drive sprockets 50, 50 are rotatably disposed on the drive shaft 48 at a distance in the axial direction.
9, two driven sprockets 51, spaced apart in the axial direction,
An endless chain 52 is provided between each pair of the driving sprocket 50 and the driven sprocket 51.
Are wound around each. That is, both side plates 47, 47
In between, a pair of endless chains 52, 52 are arranged to run freely in a parallel state.

A plurality of gripping members 53 are laid on the pair of endless chains 52, 52 at predetermined intervals in the running direction.
As shown in FIG. 8, the gripping member 53 is fixed to the endless chains 52, 52 via a projection 54b projecting from the bottom surface of the horizontal portion 54a of the L-shaped fixing plate 54. A movable plate 55 is provided on the plate 54 so as to be able to approach and separate in a posture parallel to a vertical portion 54c rising vertically from the horizontal portion 54a. That is, a rod 56 is slidably inserted into the protrusion 54b, and a movable plate 55 is disposed at one end of the rod 56 via a protrusion 55a. A regulating member 57 is provided near the other end of the rod 56, and the regulating member 57 and the protrusion 54b are provided.
, A compression spring 58 is elastically interposed therebetween so as to always bias the movable plate 55 in a direction approaching the vertical portion 54c. Then, the movable plate 55 of the gripping member 53 facing the receiving position of the sandwich 11 supplied from the supply conveyor 14 is separated from the vertical portion 54c by a plate opening mechanism 60 described later.
(See FIG. 8), sandwich 11 around which film F is wound
Is received between the two members 54c and 55. Then, after receiving the sandwich 11, the operation of the plate opening mechanism 60 is released, so that the movable plate 55 approaches the vertical portion 54c and approaches the sandwich 11
Are elastically gripped (see FIG. 9). In FIG. 2, reference numeral 59 denotes the pushing plate 27,
A guide bed for guiding the sandwich 11 supplied by 27 to the gripping member 53 in a horizontal state is shown. The guide bed 59 is formed with a triangular concave portion 59a that allows the gripping member 53 to pass therethrough.

The transfer conveyor 46 is intermittently driven at a required timing after the cutting of the band-shaped film F by the fusing sealers 43 and 44 to intermittently convey the sandwich 11 held by the holding member 53 to the downstream side. It is configured. The vertical portion 54c and the movable plate 55 of the gripping member 53 are connected to the sandwich 1 as shown in FIG.
1, the film 13 wound around the sandwich 11 while the sandwich 11 is gripped by the gripping member 53, as described later.
The side extending portion 13a and the downward extending portion 13b can be bent.

[0024]

[Regarding the release mechanism of the gripping member] The transfer conveyor 46
A mechanism 60 for opening the movable plate 55 of the gripping member 53 is disposed on the upstream and downstream sides, respectively. Since the structures of both mechanisms 60 are the same,
Only the structure of the opening mechanism 60 disposed on the upstream side will be described.

As shown in FIG. 8, the first position of the drive shaft 48 between the two drive sprockets 50, 50 is
An arm 61 is pivotally supported rotatably, and a substantially middle position of an arc-shaped operation lever 62 is pivotally supported at a tip end of the arm 61. Further, both side plates 47, 47 downstream of the drive shaft 48 are provided.
An operating shaft 63 is rotatably supported between the operating shaft 63 and the operating shaft 63.
The second arm 64 is rotatably pivotally supported. The tip of the second arm 64 is connected to the operating lever 6.
When the operating shaft 63 is rotated in the forward and reverse directions by a driving means (not shown), the operating lever 62 swings and its free end (upstream end). Thus, the projection 55a of the movable plate 55 is moved in a direction away from the projection 54b. This allows
Vertical portion 54c of fixed plate 54 in gripping member 53
The distance between the movable plate 55 and the movable plate 55 is larger than the thickness of the sandwich 11, so that the sandwich 11 can be easily received.

[0026]

[Film folding and packaging apparatus] On the transport path of the sandwich 11 by the gripping member 53 of the transfer conveyor 46,
A plurality of bending means for bending the open end of the tubular film 13 wound around the sandwich 11 and a means for attaching a tape to the film extension portion and the extension portion of the sandwich 11 via the tape. A film folding and packaging apparatus 160 including means for sticking on the inclined surface side is provided. Therefore, each unit of the packaging device 160 will be described sequentially from the upstream side in the transport direction.

[0027]

[First folded body] As shown in FIG. 10, the support plate 6 is attached to the machine frame 12 facing one side of the transfer conveyor 46.
The support plate 65 is provided with two roller sets each including a pair of guide rollers 66, 66 that are separated in the transport direction and that are vertically separated from each other. The guide bar 67 is slidably supported in the up-down direction by the two roller sets, and a cam plate (not shown) rotatably driven by a drive motor (not shown) is provided at a lower end of the guide bar 67. Is connected to the rod 68. At the upper end of the guide bar 67, a holding body 69 that extends above the transfer conveyor 46 is provided, and a support rod is provided at an upper position of the holding body 69 that sandwiches the gripping member 53 in a direction intersecting the transport direction. 70 is provided so as to always protrude downward under the elasticity of the compression spring 71. At the lower end of each support rod 70, a first bent body 7 extending toward the other support rod 70
2 is rotatably supported, and when the guide bar 67 is lowered, the film 13 faces each inclined surface of the sandwich 11 gripped by the gripping member 53.
However, as shown in FIG. 11, each of the first bent members 72 can be bent along a corresponding inclined surface. Since the first bent body 72 can rotate so as to follow the inclined surface of the sandwich 11, the film 13 can be reliably bent. As the material of the first bent body 72, plastic is preferably used.
Metals such as iron and other materials can be used as appropriate as long as they can be bent without damaging the sandwich 11 and do not crush the sandwich 11.

At the lower end of the support rod 70, a holding plate 73 is vertically provided.
A sealer 74 heated by a built-in heater is provided at a position directly below the holding plate 73. When the guide bar 67 is lowered to bend the film 13 along the respective inclined surfaces by the first bent members 72, 72, the film 13 and the film 13 extending outward from the bottom surface of the sandwich 11. A temporary seal is formed by sandwiching the vicinity of the base portion in the overlapping portion with and with the pressing plate 73 and the sealer 74 to form the linear seal line 130 (see FIG. 19B). This prevents the film 13 bent along the inclined surface from returning to the original state, so that the subsequent process can be performed favorably. As shown in FIG. 7, the holding plate 73 is set to have a shape in which the linear seal lines 130, 130 are formed on the film 13 at two locations near both ends in the thickness direction of the sandwich 11.

[0029]

[About the second bent body] The first bent body 72, 72
A support 75 which is moved up and down and moved in the transport direction by a driving means (not shown) is provided downstream of the disposition position in the transport direction, and the first folder is located at a position of the support 75 facing above the transfer conveyor 46. A second portion for bending the upstream side extending portion 13a extending outward from the inclined surface formed by bending the film 13 along the inclined surface of the sandwich 11 by the bent bodies 72, 72. A bent body 76 is provided. This second bent body 76 is the same as that shown in FIG.
As shown in the figure, a pair of holding members 77, 7 formed in a U-shape.
7 are arranged in an inverted V-shape substantially parallel to the inclined surface of the sandwich 11, and a plurality of support shafts 78 are arranged on each holding member 77 in parallel in the transport direction. As shown in FIG. 13, a plurality of rollers 79 each having a through hole 79a having an inner diameter substantially twice the diameter of the support shaft 78 are rotatably provided on each support shaft 78 through the through holes 79a. And is loosely fitted so as to be displaceable in the radial direction. And the support 75
Is the second bent body 76 facing the upper standby position that does not interfere with the sandwich 11 held by the holding member 53.
Is lowered to a position where the roller group can be brought into contact with the inclined surface of the sandwich 11 (see FIG. 14), and then horizontally moved along the carrying direction toward the downstream side in the carrying direction.

That is, when the sandwich 11 is intermittently conveyed and stopped at a predetermined position while being gripped by the gripping member 53 of the transfer conveyor 46, the support 75 is lowered and the second bent body 76 is moved. It faces upstream of the sandwich 11. Next, the support 75 is placed in the sandwich 1
By moving toward 1 (moving downstream)
The roller group of the bent body 76 strokes the inclined surface of the sandwich 11 to bend the side extending portions 13a, 13a along the inclined surface. In addition, since the roller 79 is configured to be able to be displaced in the radial direction with respect to the support shaft 78, the roller 7 can be changed in accordance with a slight change in the outer dimension of the sandwich 11.
9 moves in the radial direction (see FIG. 14), and the sandwich 11 moves.
The lateral extension 13a can be bent without damaging the side. Further, the second folded body 76 rises at an appropriate timing at which the sandwich 11 moves by the next intermittent conveyance toward the third folded body 80 described later, and then retreats to the initial standby position (to the upstream side). Move). Note that an elastically deformable spring member may be used as the support shaft 78, and the inclined surface of the sandwich 11 may be stroked by a group of rollers externally fitted to the spring member.

[0031]

[Third bending means] Downstream side extending portions 13a, 13a extending outward from the inclined surface of the sandwich 11 are bent downstream of the position where the second bent body 76 is provided. (See FIG. 17).
As shown in FIG. 12, the third bent body 80 has basically the same configuration as the second bent body 76, and therefore, the same members are given the same reference numerals and will be described in detail. Is omitted.
However, the third bent body 80 is fixedly disposed at a position where a group of rollers loosely fitted to the support shaft 78 can stroke the inclined surface of the sandwich 11 on the transport path of the sandwich 11. Then, when the sandwich 11 passes through the arrangement position of the third bent body 80, the side extending portions 13a, 13a are bent along the inclined surface by rubbing the inclined surface with the roller group. Has become. At this time, the downstream side extending portions 13a, 13a are bent so as to overlap the upstream side extending portions 13a, 13a already bent to the inclined surface by the second bent body 76. hand,
Both extension parts 13a, 13a are held in a bent state by the third bent body 80. The height of the third bent body 80 with respect to the transfer conveyor 46 can be adjusted in accordance with the external dimensions of the sandwich 11 conveyed by the gripping member 53.

Further, on the downstream side from the position where the third folded body 80 is disposed, the gripping member 53 of the transfer conveyor 46 is sandwiched in the direction intersecting the conveying direction, and is vertically moved along the moving direction of the gripping member 53. A pair of bending guides 81 and 82 (described later in detail) are provided. And this bending guide 81,8
The upper part of the upper part 2 supports the vicinity of the base of the lower extension part 13b extending outward from the bottom surface of the sandwich 11 up and down, and is folded along the inclined surface by the second and third bent bodies 76 and 80. It functions to prevent the bent side extending portions 13a, 13a from returning to the original state. Note that the level of the lower folding guide 82 is determined by the tape attaching mechanism 10 described later.
2 is set to be higher than the upper surface level of the table 88, so that the lower extension 13b is supplied above the table 88 in a floating state.

[0033]

[Tape affixing mechanism] Tape affixing mechanisms 102 for affixing the tape 83 to the lower extending portions 13b, 13b of the film 13 are provided on both sides of the transfer conveyor 46 on the downstream side of the third bent body 80, respectively. Is established. Since the structures of the tape attaching mechanisms 102 and 102 are the same, the attaching mechanisms 102 provided on the left side in FIG.
Only the structure described above will be described, and the other same members will be assigned the same reference numerals and detailed description thereof will be omitted.

The tape adhering mechanism 102 shown in the figure has two piston rods 84a, 84a which are directed to the outside of the first cylinder 84 fixed to the machine frame 12 (in the direction away from the transfer conveyor 46). The holder 87 of the tape roll 86 is rotatably disposed via the bracket 85, and the tape 83 pulled out from the tape roll 86 is placed inside the bracket 85 with the sticking surface facing upward. A table 88 to be placed is horizontally disposed. Then, the tape roll 84 and the table 88 are moved toward and away from the transfer conveyor 46 by urging and moving the bracket 85 facing the standby position shown in FIG. However, the tape 83 placed on the table 88 is set to face the lower portion of the downward extension portion 13b of the film 13 extending from the bottom surface of the sandwich 11 held by the holding member 53. .

A bracket 90 is vertically movably mounted on a support member 89 provided upright on the machine frame 12, and the second cylinder 91 and the third cylinder 9 are mounted on the bracket 90.
2 are arranged in an inverted state. A sticking member 93 made of an elastic material such as rubber or sponge is provided on the piston rod 91a of the second cylinder 91 provided outside, and the sticking member 93 extends the cylinder 91 from the piston rod 91a. By pressing the open end of the lower extending portion 13b of the film 13 facing the table 88 facing the tape affixing position close to the transfer conveyor 46, against the table 88. It functions to attach the tape 83 to the lower surface of the extension 13b. The piston rod 92a of the third cylinder 92
Are provided with pressing members 95, 95 slidably arranged in the vertical direction on both left and right sides of a perforation forming knife 94 described later. By urging the third cylinder 92 in the direction in which the piston rod 92a extends, the lower extension 13b is sandwiched between the third cylinder 92 and the receiving base 96 disposed below the lower extension 13b. Be composed. Then, with the downwardly extending portion 13b held between the holding members 95, 95 and the receiving base 96, the bracket 85 is moved to the first position.
The tape 83 is pulled out from the tape roll 86 by being moved to the standby position by the urging of the cylinder 84. The bracket 85 is provided with a pressing roll 97 that functions to allow the tape 83 pulled out from the tape roll 86 to face the table 88 horizontally while being urged toward the table 88 by a spring (not shown). You. The press roll 97 is formed of a material to which the tape 83 is difficult to stick.

The machine frame 12 is provided with a fourth cylinder 98 at a position facing lower than the level at which the table 88 is provided, and the piston rod 98a of the cylinder 98 has a piston rod 98a which does not interfere with the moving area of the table 88. Bracket 9
9 are provided. Then, a perforation forming knife 94 and a tape cutting knife 100 are arranged and fixed in parallel with each other at a predetermined interval on a portion of the bracket 99 facing the table 88, and the fourth cylinder 98 is connected to the piston rod 98.
By urging the bracket 99 downward in the direction in which a is pulled in, the perforation 101 is provided to the lower extension 13b and the tape 83 is cut at the same time. That is, the perforation forming knife 94 is disposed at a position facing above the receiving table 96, and the cylinder 98
When the bracket 99 is lowered by urging the
The perforation 101 for opening along the thickness direction of the sandwich 11 is provided in the downward extension 13b of the film 13 facing upward (see FIG. 19 (e)). The pressing members 95, 95 are provided on both sides of the perforation forming knife 94.
95 is slidably provided, and the lower extension 13b is sandwiched between the holder 96 and the holding members 95, 95, so that the perforation 101 is imparted by the knife 94 reliably. At the same time, the displacement of the sandwich 11 is prevented.

The tape cutting knife 100 is
When the bracket 83 is lowered by the urging of the fourth cylinder 98 when the bracket 83 is lowered outwardly from the open end of the lower extension 13b to which the tape 83 is attached by a predetermined length, It is designed to be cut. As a result, the tape 83 attached to the lower extension 13b
As shown in FIG. 19 (e), is cut off from the open end of the extension portion 13b, leaving a sticking allowance for a predetermined length. A groove 88a is formed in the table 88 facing the lower part of the tape cutting knife 100, and the tape 83 is reliably cut by the knife 100 entering the groove 88a.

In the apparatus of the embodiment, the perforation forming knife 94 is disposed only on the tape attaching mechanism 102 disposed on the left side in FIG. 15, and the perforation 101 is formed only on one lower extension 13b. However, the perforation forming knives 94 may be provided on both the tape attaching mechanisms 102, 102, and the perforations 101 may be formed on the both lower extension portions 13b, 13b.

[0039]

[Bending guide] On both sides of the transfer conveyor 46, a pair of bending guides 81 and 82 are disposed in parallel with the conveyor 46, and the tape attaching mechanism 10 is provided.
The portion facing the upstream side of 2,102 functions to guide the downwardly extending portions 13b, 13b of the film 13 to the downstream side while supporting it from above and below as described above. Further, in the portion facing the downstream side of the tape attaching mechanism 102, 102, the downward extension portions 13b, 13b are configured to function so as to be bent vertically upward (see FIG. 17). That is, the upper bending guide 81 is the same as that shown in FIGS.
As shown in FIG. 7, the lower bending guide 82 is positioned so as to face above the vicinity of the base of the lower extension 13 b extending outward from the bottom surface of the sandwich 11 gripped by the gripping member 53. The horizontal portion 82a faces below the downwardly extending portion 13b. Further, the tape attaching mechanism 102 of the horizontal portion 82a in the lower folding guide 82
A vertical portion 82b which rises vertically at a predetermined height is formed at an outer edge separated from the transfer conveyor 46 at a position facing the downstream side of the transfer portion 46, and a predetermined length is provided downstream from the upstream end of the vertical portion 82b. An inclined portion 82c that is inclined upward is formed over the area. As shown in FIG. 16, the vertical portion 82b extends in parallel with the upper bending guide 81 at a required interval. Therefore, the lower extending portion 13b to which the tape 83 is attached by the tape attaching mechanism 102
The bending guide 82 is moved with the movement of the gripping member 53.
Is gradually bent upward along the inclined portion 82c, and finally faces substantially vertically between the vertical portion 82b and the other bending guide 81.

[0040]

[About the sticking mechanism of the downward extension] The bending guide 8
As shown in FIG. 7, near the downstream end of
An opening 82d is opened in 2b, and a sticking member 105 that moves forward and backward by the cylinder 104 toward the transport center of the transfer conveyor 46 faces outside of the opening 82d. The sticking member 105 has a plurality of U-shaped brackets 106 provided on a piston rod 104a of the cylinder 104.
A roller 107 (two in the embodiment) is loosely fitted so as to be rotatable and deflectable in the radial direction. As shown in FIG. 16, the cylinder 104 is disposed so as to move the sticking member 105 along the inclined surface of the sandwich 11. That is, at the timing when the sandwich 11 held by the holding member 53 reaches the position corresponding to the opening 82d and stops by the intermittent drive of the transfer conveyor 46, the cylinder 104
a, the sticking member 105 facing the outside of the bending guide 82 extends inward through the opening 82d, and the lower extending portion 13b in the vertical state is sandwiched by the sandwich 11a. Of the film 1 already bent along the inclined surface while the tape 83 attached to the downwardly extending portion 13b is bent along the inclined surface.
3 is attached. The bending guide 81 facing the inside of the vertical portion 82b is set to have a length that does not reach the opening position of the opening 82d, and is set so as not to interfere with the sticking member 105 that advances and retreats through the opening 82d.

[0041]

[Regarding the article release mechanism] At the downstream end of the transfer conveyor 46, the release members 109, 109 () which move forward and backward in the transport direction via a link mechanism 108 as shown in FIG. (Only one is shown) is arranged,
The discharge members 109 and 109 are positioned so as to move to a position where they can come into contact with the bottom surface of the sandwich 11 held by the holding member 53. That is, at an appropriate timing when the gripping member 53 of the transfer conveyor 46 reaches the discharge position of the sandwich 11 and stops intermittently, when the movable plate 55 is opened by the opening mechanism 60 described above, the release member 109,
By moving 109 toward the downstream side in the transport direction, the sandwich 11 of the gripping member 53 is pushed out and discharged out of the system via the chute 122.

[0042]

Next, the operation of the packaging machine according to the embodiment will be described. In addition, the strip-shaped film F is spread on the downstream side of the supply conveyor 14 in a state where the seal portion does not reach, and the sandwich 1 in the transfer conveyor 46 is provided.
It is assumed that the holding member 53 is on standby at the receiving position 1 with the movable plate 55 opened.

In this state, the concave portion 2 of the positioning table 22
With the sandwich 11 facing the 2a, the sandwich 11 is placed at the transport center of the transport belt 18 with its top directed toward the upstream side. Supply conveyor 1
When the detecting means 120 detects that the sandwich 11 has been conveyed to a predetermined position by the intermittent movement of the cylinder 4, the cylinders 24, 24 are urged, and
As shown in FIG. 5, the feeding portions 27a and 27a come into contact with both inclined surfaces of the sandwich 11 stopped at a predetermined position by the intermittent stop of the supply conveyor 14, as shown in FIG. Then, in synchronization with the intermittent movement of the supply conveyor 14, the two cylinders 24, 24
By moving to the downstream side along 3, the sandwich 11 is supplied from the bottom side toward the extending portion of the strip film F.

The stretched strip film F includes:
The pull-out portions 27b, 27b of the pushing plates 27, 27 first come in contact with each other, and the belt-like film F is pushed downstream with the forward movement of the plates 27, 27, so that the upper and lower tension rollers 34, 37 move upward. And the film F is pulled out. Thereby, the band-shaped film F is wound around the bottom and side surfaces (upper and lower surfaces on the supply conveyor) of the sandwich 11. Then, as shown in FIGS. 6 and 8, at the timing when the sandwich 11 arrives between the vertical portion 54 c and the movable plate 55 of the holding member 53 waiting at the receiving position and intermittently stops, the opening mechanism 60 Activate the operating lever 62 to move the movable plate 55
From the projecting piece 55a. Accordingly, the movable plate 55 moves toward the vertical portion 54c under the elasticity of the compression spring 58, and elastically grips the sandwich 11 from the thickness direction.

Next, the upper and lower fusing sealers 43, 44
Move close to each other, and cut off the band-shaped film F wound on the sandwich 11 by the contact of the fusing sealers 43 and 44 at the approximate center in the thickness direction on the inclined surface side of the sandwich 11. As a result, as shown in FIG. 19A, the sandwich 11 is wound around the film 13 on which the fusing seal line (seal portion) is formed at the approximate center in the thickness direction on the inclined surface side. The pushing plates 27, 27 are fixed to the film F
Until the cutting of the seal is completed, the sandwich 11 is held in a state of being supported from both sides, and the cylinders 24, 24 are appropriately separated from each other at appropriate timing when the sealers 43, 44 are separated from each other.
Is pushed backward, and the pushing plates 27, 27 are separated from each other. The two cylinders 24, 24 are
It retreats (moves upstream) along 23 and waits for the next sandwich 11 to arrive. The pushing plate 27,
27, the upper and lower ends in the height direction face substantially the same positions as the upper and lower ends of the sandwich 11, and
7c and 27c are near the rear end of the sandwich 11 in the supply direction.
(Near the top), the film F
When wound around the sandwich 11 by 3,44,
The shape of the sandwich 11 is not destroyed by the film F.

Here, when the band-shaped film F is cut by the sealers 43 and 44, the air cylinder 4
1, the lower tension roller 37 is forcibly lowered to the lower fixed position, and the winding roller 36 is driven to rotate by the drive motor 35 to wind the belt-like film F. When the pulse transmitting means 40 provided on the guide roller 38 counts a preset number of pulses, the motor 35 stops and the winding of the belt-like film F stops. Thereby, the seal part attached to the band-shaped film F by the sealers 43 and 44 is moved to a lower position not used for the next packaging. That is, in the packaging machine 10 of the embodiment, the cylindrical film 13 in which only one seal portion is formed substantially at the center in the thickness direction on the inclined surface side of the sandwich 11 is formed.
The sandwich 11 is wound around. Further, the feeding roller 32 is rotationally driven by the driving motor 31,
When the origin sensor 42 detects that the upper tension roller 34 has been lowered from the raised position to the origin position due to the drawing of the belt-shaped film F from the film roll 30, the motor 31 stops, and the film drawing stops. As a result, the belt-like film F for the next packaging is stretched and held between the upper and lower tension rollers 34 and 37.

The gripping member 53 which grips the sandwich 11 having the film 13 wound around it by the above-mentioned process is intermittently driven by the transfer conveyor 46 so that the first bent body 72,
At the timing of intermittent stop after reaching below 72, as shown in FIG. 11, the guide bar 67 is lowered, and the film 13 facing each inclined surface of the sandwich 11 is turned into each first bent body. By 72, it is bent along the corresponding inclined surface. Also, the first bent body 72,
Film 1 folded along each inclined surface by 72
3 and the film 13 extending outward from the bottom surface of the sandwich 11, the linear seal line 1 is formed by the pressing plate 73 and the sealer 74 in the vicinity of the base thereof.
The provisional seal is performed by forming 30, 30 (see FIG. 19B).

By the intermittent drive of the transfer conveyor 46,
After the holding member 53 holding the sandwich 11 reaches the downstream side of the position where the second bent body 76 is provided and stops, the support 75 descends, and moves the second bent body 76 upstream of the sandwich 11. Face to the side. Next, when the second bent member 76 moves to the downstream side, the rollers of the bent member 76 rub the inclined surface of the sandwich 11, and the upstream side extending portion extending from the inclined surface. 13a, 13a are bent in a tight state along the inclined surface (see FIG. 19C). The second bent body 76 is the sandwich 1
After the gripping member 53 gripping 1 is raised at an appropriate timing to be moved toward the third bent body 80 on the downstream side by the next intermittent drive, the gripping member 53 retreats and returns to the initial standby position.
Further, since the roller 79 of the second bent body 76 is configured to be able to be displaced in the radial direction with respect to the support shaft 78, it is displaced in accordance with the change in the outer dimensions of the sandwich 11 (see FIG. 14). In addition, the lateral extension 13a can be bent without damaging the sandwich 11.

When the gripping member 53 passes through the position at which the third bent member 80 is provided, the rollers of the bent member 80 rub the inclined surface of the sandwich 11 so that the rollers come out of the inclined surface of the sandwich 11. Downstream side extension part 1
3a, 13a are bent in a tight state along the inclined surface, and overlap the upstream side extending portions 13a, 13a (see FIG. 19D). Further, since the rollers of the third bent body 80 are also displaced in accordance with the change in the outer dimensions of the sandwich 11, the damage to the sandwich 11 is prevented. Then, the downwardly extending portions 13b, 13b extending outward from the bottom surface of the sandwich 11 are conveyed downstream while facing between the bending guides 81, 82. The lower extension 13b is conveyed to the downstream side in a state where the lower extension 13b is inclined slightly upward from the level of the bottom surface of the sandwich 11.

In each of the tape sticking mechanisms 102 provided on the downstream side of the position where the third bent member 80 is provided, the tape 83 is placed horizontally on the upper surface of the table 88. Reference numeral 88 indicates a tape application position close to the transfer conveyor 46. Therefore, when the holding member 53 holding the sandwich 11 reaches the position where the attaching mechanism 102 is provided, the lower extension 13b faces above the tape 83 placed on the table 88. Then, at the timing when the gripping member 53 stops intermittently,
When the second cylinder 91 is urged and the attaching member 93 descends to press the lower extension 13b against the tape 83, the tape 83 is attached to the lower surface of the lower extension 13b. Further, the third cylinder 92 is urged, and the pressing members 95, which are located on the left and right sides of the perforation forming knife 94,
95 is lowered, and the portion of the lower extension 13 b to which the tape 83 is not attached is clamped between the receiving stand 96 and the receiving portion 96.

Next, after the second cylinder 91 is reversely urged to retract the sticking member 93 upward, the first cylinder 84 is urged to move the table 88 and the tape roll 86 toward the standby position. As a result, the tape 83 is pulled out from the tape roll 86. Tape roll 8
When 6 moves to the standby position, the fourth cylinder 98 is urged to lower the perforation forming knife 94 and the tape cutting knife 100. As a result, a perforation 101 for opening the sandwich 11 in the thickness direction of the sandwich 11 is provided on the downwardly extending portion 13b facing between the pressing members 95, 95, and the tape 83 is attached to the inclined surface side. (See FIG. 19E). Note that FIG.
In the right side, only the tape 83 is stuck to the lower extension 13b on the right side, and the perforation 101 is not provided.

The downward extending portions 13b, 13b to which the tapes 83, 83 are attached are inclined portions 82c, 82 of the bending guides 82, 82 with the intermittent movement of the gripping member 53.
c, it is gradually bent upward, and finally brought into a substantially vertical state. This sandwich 11 is used as the bending guide 8
At the timing of intermittent stop after reaching the position of the opening 82d provided in the second cylinder 2, the cylinders 104 are urged and the sticking member 105 is moved to the opening 8 as shown by a two-dot chain line in FIG.
The lower extending portion 13 which extends inward through 2d and is in a vertical state
b is bent along the inclined surface of the sandwich 11, and the sticking margin of the tape 83 is attached to the film 13 already bent along the inclined surface. This allows
A package P in which the sandwich 11 is tightly packaged with the film 13 is obtained (see FIG. 19 (f)).

At an appropriate timing when the gripping member 53 gripping the sandwich 11 arrives at the discharge position due to intermittent movement and is stopped, the opening mechanism 60 operates to open the movable plate 55 of the gripping member 53. Further, the link mechanism 108 is operated, and the discharging member 1 connected thereto is operated.
By moving 09 and 109 toward the downstream side, the sandwich 11 is extruded from the gripping member 53 and discharged out of the system via the chute 122.

As described above, the sandwich 1 is formed by the belt-like film F continuously drawn from the film roll 30.
1 can be packaged, so that manufacturing efficiency can be significantly improved. In addition, a change in thickness due to a change in the number of stacked sandwiches 11 or the like can be easily dealt with only by changing the supply amount of the film F without changing the width of the band-shaped film F. Therefore, it is not necessary to prepare films of various dimensions according to the thickness dimension of the sandwich 11, and the packaging material cost can be reduced. Also, sandwich 11
The laterally extending portion 13a and the downwardly extending portion 13b of the cylindrical film 13 wound around the film
Can be automatically folded along the inclined surface and attached, so that automation of packaging can be achieved. Furthermore, the lateral extension 1
The respective roller groups of the second and third bent bodies 76 and 80 that bend 3a are displaced in accordance with the change in the outer dimensions of the sandwich 11 and lightly stroke the inclined surface. The extension parts 13a and 13b can be tightly bent without damaging the sandwich 11.

[0055]

FIG. 20 shows another embodiment of the present invention. The structure of the film 13 wound around the sandwich 11 before bending the extending portions 13a, 13a on both sides is shown in FIG. It is configured to cut the seal without sticking the two downwardly extending portions 13b, 13b of the film 13 to the inclined surface of the sandwich 11. That is, on the downstream side of the third bent body 80, the seal cutting mechanisms 110, 110 are arranged opposite to each other on both sides of the transfer conveyor 46. Both seal cutting mechanism 11
Since the structures of 0 and 110 are the same, only the structure of the mechanism 110 disposed on the left side will be described.

A lower fusing sealer 111 heated by a built-in heater is fixedly arranged at a position facing below a lower extending portion 13b extending from the bottom surface of the sandwich 11 held by the holding member 53. An upper fusing sealer 113 heated by a built-in heater is provided at an upper position facing the lower fusing sealer 111 with the lower extension 13b interposed therebetween.
Are movably arranged by the cylinder 112. Then, the upper fusing sealer 113 is moved close to the lower fusing sealer 111, and the lower extension portion 1 is moved by both the sealers 111 and 113.
By sandwiching the extension 3b, the extension 13b is cut with a seal. The position where the seal is cut by the fusing sealers 111 and 113 is set near the base of the downwardly extending portion 13b.

Further, outside the positions where the fusing sealers 111, 113 are arranged, there is arranged a clamping means 114 which is biased by the cylinder 115 and clamps the open end of the downward extending portion 13b, and the clamping means 114 is provided. Thus, the seal cutting by the fusing sealers 111 and 113 is performed in a state where the lower extension portion 13b is held therebetween. Further, the clamping means 114
Is configured to be rotatable by a rotary actuator 116, and after rotating the holding portion of the holding means 114 holding the cutting chips of the downwardly extending portion 13b cut off by sealing so as to point downward, the cylinder 115 The cutting debris can be discharged to the outside of the machine by reversely urging and opening it. Alternatively, a welding sealer and a knife may be provided, and the lower extending portion 13b may be welded by the welding sealer and then cut by the knife.

In the case of this embodiment, when the sandwich 11 passing through the position where the third bent body 80 is provided arrives at the mechanical section and stops intermittently, both seal cutting mechanisms 110, 110 operate. Downward extension 13b,
13b is seal cut from its base. That is, since the downwardly extending portion 13b is not superimposed on the inclined surface side of the sandwich 11, a neat appearance can be obtained, and the sandwich 11 can be wrapped in a sealed state by a fusing seal, which is excellent in hygiene. Can be obtained. Further, the bending guide 103 and the attaching mechanism of the lower extension 13b can be omitted.

FIG. 21 shows still another embodiment, in which one lower extending portion 13b of a film 13 wound around a sandwich 11 is stuck on an inclined surface with a tape 83 and the other lower portion. The extension 13b is configured to be cut by a seal. That is, on the downstream side of the third bent body 80, the tape sticking mechanism 102 is provided on one side of the transfer conveyor 46, and the seal cutting mechanism 110 is provided on the other side. Further, in this embodiment, at a timing when the sandwich 11 passing through the position where the third folded body 80 is disposed reaches the mechanism portion and is intermittently stopped, the one downward extension portion 13b is passed through the tape attaching mechanism 102. While the tape 83 is stuck, the other lower extension 13b is cut off from the base by the seal cutting mechanism 110. In this embodiment, the bending guides 81 and 82 of the downward extending portion 13b and the attaching mechanism are provided only on the side where the tape attaching mechanism 102 is provided.

In yet another embodiment shown in FIG. 21, the outer appearance can be similar to that of the conventional packaging form using a bag already produced. In addition, as compared with another embodiment shown in FIG.
It is possible to reduce the cutting waste of 3b.

In this embodiment, the sandwich 11 gripped by the gripping member 53 of the transfer conveyor 46 is transported along the upper transport path with the top of the sandwich 11 facing upward, and the second folding is performed above the upper transport path. Bent body 76 and third folded body 80
The case where the tape attaching mechanism 102, the attaching member 105, and the like are provided along with the above-mentioned transport path is described, but the present application is not limited to this. For example, while the sandwich 11 gripped by the gripping member 53 is transported along the lower transport path with its top directed downward, the second folded body 76 or the third folded body 76 provided below the transport path is transported.
The side extension 13a is bent by the bent body 80, and the lower extension 13b is bent and attached by a tape attaching mechanism 102 or an attaching member 105 provided correspondingly. Is also good. While holding the sandwich 11 in the receiving position at the receiving position, while moving the gripping member 53 horizontally, each mechanism of the film folding and packaging apparatus 160 provided at a position facing the top of the sandwich 11 folds the film opening end. It is also possible to perform bending.

In the embodiment, the upstream and downstream side extending portions 13a are bent by the two bent bodies 76 and 80 arranged adjacent to each other in the conveying direction of the sandwich 11. It is also possible to bend the laterally extending portions 13a on both sides by moving the bent body relative to the sandwich 11 from the upstream side and the downstream side. Since the film 13 facing the inclined surface of the sandwich 11 can be bent by lowering the second bent body 76 from directly above the top side of the sandwich 11, the first bent body 72 is omitted. It is also possible. Further, it is not always necessary to arrange the roller group in the holding member 77 in a plurality of rows in the transport direction, and a single row may be provided.

Further, in the embodiment, a plurality of support shafts 78 are provided so that the entire inclined surface of the sandwich 11 can be stroked even if the outer dimensions of the sandwich 11 change or the contents project from the inclined surface. Although the case where the roller 79 is configured to be able to be displaced in the radial direction has been described, the present application is not limited to this. That is, for example, a single elastically deformable roll may be used as long as a portion corresponding to a portion where the content protrudes from the inclined surface can be deviated in a direction away from the inclined surface. When the outer dimensions of the sandwich 11 change, the entire roll may be configured to be movable so as to be separated from the inclined surface accordingly. A guide 8 fixedly disposed as a member for bending the lower extending portion 13b toward the inclined surface side.
Instead of 1, 82, a bent body or the like that is moved by an appropriate driving means may be used.

In the embodiment, the case where the tape 83 is used as a means for attaching the lower extension 13b to the inclined surface has been described. However, the present invention is not limited to this. Or the like, or may be attached with an appropriate adhesive. After the lower extension 13b is bent along the inclined surface, a tape or a label is attached between the lower extension 13b and the film 13 on the inclined surface side to incline the lower extension 13b. It is also possible to attach it to the surface.
Furthermore, in the embodiment, the tape 83 is pulled out from the direction intersecting the transport direction of the sandwich 11 and is attached to the downward extending portion 13b, but the tape 8 pulled out from the direction parallel to the transport direction is used.
3 may be attached to the downward extension 13b. Further, it is not always necessary to provide the perforations 101 on the downward extension 13b.

[0065]

As described above, according to the film opening end folding and packaging apparatus of the present invention, it is a flexible object to be packaged and the contents are exposed from the inclined surface like a sandwich. Even if there is, the package can be tightly folded along the shape of the article to be packaged without damaging the contents, so that the commercial value can be improved. In addition, even if the external dimensions of the package change, the film can always be bent in a tight state according to the dimensions of the package. Furthermore, since the opening end of the film rolled and wrapped in the thickness direction of the packaged material is bent, the roll wrapping section is provided on the upstream side, thereby eliminating the need for conventional bagging work that had to be manually performed. In addition, automation of packaging can be achieved and labor can be saved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an entire packaging machine according to an embodiment.

FIG. 2 is a plan view of a main part of a supply conveyor constituting the body-wrap packaging device.

FIG. 3 is a side view of a main part of the supply conveyor.

FIG. 4 is a side view of a main part of a supply conveyor and a film supply mechanism constituting the body-wrap packaging device.

FIG. 5 is an explanatory view showing a step of winding a band-like film around a sandwich by the body-wrapping apparatus.

FIG. 6 is an explanatory view showing a step of body-wrapping a band-like film around a sandwich by the body-wrapping apparatus.

FIG. 7 is a schematic side view showing a transfer conveyor and a film folding and packaging apparatus.

FIG. 8 is a schematic side view of a main part showing a state in which a movable plate in the gripping member is opened by an opening mechanism.

FIG. 9 is a schematic side view of a main part showing a state in which a movable plate of the gripping member is released from an opening mechanism.

FIG. 10 is a front view of the first bent body taken along line XX of FIG. 7;

FIG. 11 is an explanatory view showing a state where a film wound around a sandwich by a first bent body is bent along an inclined surface.

FIG. 12 is a front view of the second and third bent bodies indicated by line XII-XII in FIG. 7;

FIG. 13 is a front view of an essential part showing a roller group of the second bent body in a cross section.

FIG. 14 is a front view of relevant parts showing a state in which a laterally extending portion is bent by stroking an inclined surface of a sandwich with a roller group of a second bent body.

FIG. 15 is a rear view of the tape attaching mechanism indicated by line XV-XV in FIG. 7;

FIG. 16 is a rear view of the bending guide and the sticking mechanism shown by the line XVI-XVI in FIG. 7;

FIG. 17 is a schematic plan view of a main part showing the transfer conveyor at a position where a bending guide is provided.

FIG. 18 is a schematic side view showing the release mechanism of the sandwich.

FIG. 19 is an explanatory diagram showing a process of packaging a sandwich with a film by the packaging machine according to the embodiment.

FIG. 20 is an explanatory view showing a main part of another embodiment of the packaging machine according to the present invention.

FIG. 21 is an explanatory view showing a main part of still another embodiment of the packaging machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Sandwich (packed thing) 13 Cylindrical film 13a Side extension part (opening end) 13b Lower extension part (extension part) 46 Transfer conveyor 76 2nd bending body (bending means) 78 Support shaft 79 Roller Reference Signs List 80 Third bent body (bending means) 81 Bending guide (bending member) 82 Bending guide (bending member) 102 Tape sticking mechanism (bending sticking means) 105 Sticking member (bending sticking means) ) 110 Seal cutting mechanism (Seal cutting means)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-66386 (JP, A) JP-A-4-294716 (JP, A) JP-A-2-131904 (JP, U)

Claims (6)

(57) [Claims] 1. A device for wrapping a film having a triangular shape, such as a sandwich, which is wrapped around in the thickness direction and is formed into a tubular shape, by bending the open end of the film to wrap the film. The bottom surface facing the top where the inner angle of the object is set to approximately 90 ° faces the transfer conveyor side in a position facing the top side of the packaged article supported and conveyed by the conveyor in a posture facing the conveyor side. Bending means formed in a shape following the two inclined surfaces with respect to the top, the bending means being pivotally and radially displaced to a support shaft arranged along the inclined surface. It is composed of a plurality of rollers that are loosely fitted, and by rubbing the inclined surface of the article to be conveyed by the transfer conveyor with the roller group of the folding means, the open end of the film is formed along the inclined surface. Characterized by being configured to be bent That the film openings Hasho bending packaging device. The method according to claim 2, wherein said folding means, said with two groups disposed adjacent to the conveying direction of the articles to be packaged, at least to be packaged
2. The film opening end bending device according to claim 1, wherein the folding means on the upstream side in the transport direction of the object is configured to be horizontally movable in the transport direction and to move in a direction perpendicular to the transport surface of the transport conveyor. Packaging equipment. 3. A device for wrapping a film having a triangular shape, such as a sandwich, which is wrapped around the thickness in the thickness direction and formed into a tubular shape, by bending the open end of the film. The bottom surface facing the top where the inner angle of the object is set to approximately 90 ° faces the transfer conveyor side in a position facing the top side of the packaged article supported and conveyed by the conveyor in a posture facing the conveyor side. A pair of bending means formed in a shape following the two inclined surfaces with respect to the top portion and capable of being displaced in a direction away from the inclined surface, wherein the pair of bending members are arranged in the conveying direction of the article to be packaged. Provided adjacently and at least upstream in the transport direction of the packaged item
The folding means on the side is configured to be horizontally movable along the transport direction and to move in the vertical direction with respect to the transport surface of the transport conveyor, and the inclined surface of the article to be transported by the transport conveyor, A film opening end bending and packaging apparatus characterized in that an opening end of the film is bent along an inclined surface by rubbing with a bending means. 4. A bottom side which is located on at least one side of the transfer conveyor along the conveying direction and which is formed by bending the opening end of the film along the inclined surface of the packaged object by the bending means. The film opening end folding packaging apparatus according to claim 1 or 3, further comprising a bending member that bends a film extending portion that extends outward from the side surface toward the inclined surface side. 5. A bottom side which is located on at least one side of the transfer conveyor along a conveying direction and which is formed by bending the opening end of the film along the inclined surface of the packaged object by the bending means. And a seal cutting means for sealing a base of the film extending portion extending outward from the side surface and cutting the extension at an appropriate position extending outward from the sealing portion. 3. The film opening end bending packaging apparatus according to 3. 6. A base formed by bending the opening end of the film along at least one side of the transfer conveyor along the conveying direction and along the inclined surface of the packaged object by the bending means. A film sticking means for bending a film extending portion extending outward from the side surface along the inclined surface and attaching the extending portion to a film located on the inclined surface. 3. The film opening end bending packaging apparatus according to 3.