JP2660382B2 - Film opening end bending device - 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 tightly bending the open end of a film wound on a triangular flexible package such as a sandwich along an inclined surface.

[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 device capable of bending an open end of a film wound around a packaged object along an inclined surface 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 is an apparatus for bending the open end of a cylindrically-shaped film that is wrapped in a thickness direction around a packaged object having a triangular shape such as a sandwich. A pair of support means which are disposed so as to be movable close to and away from each other with respect to the two inclined surfaces with respect to the top where the inner angle of the packaged object is set to approximately 90 °, and one end of each of the support means. When the supporting means is moved from the top side to the inclined surface side, the supporting means is swung in the inclined direction of the inclined surface while rubbing the film opening end at its free end. And a bending member for bending the opening end of the film along the inclined surface.

[0007]

A pair of support means, which are positioned on both sides of the inclined surface with respect to the top of the package around which the cylindrical film is wound in a thickness direction from the top, are attached to the package from the top. Move closer to the slope side. The free end of the bending member, one end of which is pivotally supported by each supporting means, is in contact with the opening end of the film as the supporting means moves, and bends it toward the inclined surface. When the support means further moves and the free end of the folding member comes into contact with the inclined surface of the article to be packaged, the folding member swings in the inclination direction of the inclined surface while rubbing the film opening end thereafter. Thereby, the film opening end is bent along the inclined surface.

[0008]

Next, a preferred embodiment of the film opening end bending apparatus according to the present invention will be described below. In the embodiment, the inner angle of the top part is approximately 90 ° as a packaged object.
In addition to the isosceles triangular sandwich set as the target, for convenience of explanation, the surface located on the long side of the sandwich is "bottom", the surface located on the short side is "inclined surface", and the top of the sandwich The bottom side is referred to as “downward”, and the sandwich direction (thickness direction) is referred to as “side”.

[0009]

FIG. 1 is a side view showing a schematic configuration of a packaging machine in which a folding device according to an embodiment is adopted. In the packaging machine 10, a sandwich film 11 is wound around a band-shaped film F. Wrapping device 140 and the wrapping device 1
Basically, a transport conveyor 46 for transporting the sandwich 11 packaged and wound at 40 to the downstream side, and a film folding and sticking device 160 for folding and sticking the open end of the film 13 wound around the sandwich 11. Be composed.

[0010]

[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 on the downstream side 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. .

[0012]

[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.

[0015]

[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 disk means 40 including a slit disk for counting the amount of film supplied and a photoelectric sensor. . 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.

[0018]

[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 disposed, and the strip-shaped film F drawn by the sandwich 11 conveyed by the supply conveyor 14 and the pushing plates 27, 27 is passed through the respective sealers 43, 44.
It is configured to be guided to the downstream side without making contact with the.

[0019]

[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.

The pair of endless chains 52, 52 are provided with a plurality of gripping members 53 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.

[0022]

[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 the first position.
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.

[0024]

[Film bending and sticking apparatus] On the conveyance 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; a means for attaching a tape to the film extension; and the extension for the sandwich 11 via the tape. A film bending and sticking device 160 including means for sticking on the inclined surface side is provided. Therefore, each unit of the folding and sticking apparatus 160 will be described sequentially from the upstream side in the transport direction.

[0025]

[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. A support member 131 is provided near the lower end of each support bar 70.
In addition, one end of a block-shaped first bent body 72 extending toward the other support member 131 is pivotably supported. As shown in FIG. 10, the first bent body 72 is always held in a required inclined state in which its free end is inclined downward, and when the guide bar 67 is lowered, the first bent body 72 The film 13 is set so as to come into contact with the film 13 facing each inclined surface of the sandwiched sandwich 11 from its free end. Then, the first bent body 72 swings (swings in the inclination direction of the inclined surface) so as to follow the inclined surface of the sandwich 11 with the pivot portion with the support member 131 as a fulcrum while bending the film 13 to the inclined surface side. Is like
(See FIG. 11). In addition, on the lower surface side (the side facing the inclined surface) of the free end of the first bent body 72, when the end comes into contact with the film 13 and is bent along the inclined surface of the sandwich 11, In order to be able to perform good bending without damaging the film 13, a slope is provided from the lower end to the upper end. As the material of the first bent member 72, a synthetic resin such as plastic is preferably used. However, the first bent member 72 can be bent without damaging the film 13 and has a relatively light weight that does not crush the sandwich 11. Any other material can be used as appropriate.

At the lower end of the support rod 70, a thin plate-shaped seal 73 is vertically provided. Outside the side plates 47, heating means such as a heater is provided at a position directly below the seal 73. A heated sealing body 74 is provided.
Then, the guide bar 67 is lowered and the first bent bodies 72, 7
2, when the film 13 is bent along each inclined surface, the vicinity of the base of the overlapping portion of the film 13 and the film 13 extending outward from the bottom surface of the sandwich 11 is a seal member 73 and a heat seal member. The temporary seal is formed by forming a linear welding seal line 130 by sandwiching the seal with the base member 74 (see FIG. 17B). 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. In addition, the seal body 73
The lower end of the first bent body 72 is set to be the same as or slightly above the free end of the first bent body 72 in the normal inclined state, so that the film 13 can be reliably bent by the first bent body 72. It is configured to obtain. As shown in FIG. 7, the lower end of the seal body 73 has an inverted concave shape so that linear welding seal lines 130, 130 are formed on the film 13 at two locations near both ends in the thickness direction of the sandwich 11. Is formed.

[0027]

[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. And each spindle 7
8, a plurality of rollers 79 are loosely fitted so as to be rotatable and displaceable in the radial 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
1 so that the lateral extension 13
a and 13a are bent along the inclined surface of the sandwich 11 by the roller group of the bent body 76. 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 79 moves in the radial direction according to a slight change in the outer dimensions of the sandwich 11, and the sandwich 11 may be damaged. The bending of the lateral extension 13a can be performed without the need. 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).

[0029]

[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. 15).
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 provided on the transport path of the sandwich 11. When the sandwich 11 passes through the position where the third bent body 80 is provided, the laterally extending portions 13a, 13a are bent by a group of rollers along the inclined surface. 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. And both extension parts 1
3a and 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 bent body 80 is disposed, the gripping member 53 of the transfer conveyor 46 is sandwiched in a direction intersecting the transport 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.

[0031]

[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 two 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 sticking mechanism 102 shown in FIG. 2 is provided with 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 holding member 87 of the tape roll 86 is rotatably disposed via the bracket 85, and the tape 83 pulled out from the tape roll 86 has its sticking face up inside the bracket 85. A table 88 placed in a state is horizontally disposed. Then, the bracket 8 facing the standby position shown in FIG.
The tape roll 84 and the table 88 move close to the transfer conveyor 46 by urging and moving the 5 in the direction in which the piston rod 84a of the first cylinder 84 is retracted, and are placed on the table 88. Tape 83
The sandwich 1 gripped by the gripping member 53
The lower extension 13b of the film 13 extending from the bottom surface of the film 1
Is set to face the bottom of the

A bracket 90 is provided on a support member 89 erected on the machine frame 12 so as to be vertically movable, and a second cylinder 91 and a 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 to the lower extension 13b of the film 13 facing upward (see FIG. 17E). 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. 17 (e), is cut off with a predetermined length remaining from the open end of the extension 13 b. 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 provided only on the tape attaching mechanism 102 provided on the left side in FIG. 13, 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.

[0037]

[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, at a portion facing the downstream side of the tape applying mechanisms 102, 102, the lower extending portions 13b, 13b are configured to bend vertically upward (see FIG. 15). That is, the upper bending guide 81 is the same as that shown in FIGS.
As shown in FIG. 5, while being positioned so as to face above the vicinity of the base of the downwardly extending portion 13b extending outward from the bottom surface of the sandwich 11 gripped by the gripping member 53, the lower bending guide 82 is 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. The vertical portion 82b extends in parallel with the upper bending guide 81 at a required interval as shown in FIG. 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.

[0038]

[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. Further, as shown in FIG. 14, the cylinder 104 is arranged to be inclined 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.

[0039]

[Regarding the article discharging mechanism] At the downstream end of the transfer conveyor 46, the discharging 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.

[0040]

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. 17A, 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 gripping the sandwich 11 on which the film 13 is wound by the above-described process is intermittently driven by the transfer conveyor 46 so that the first bent bodies 72, 72 facing the standby position shown in FIG. The guide bar 67 is lowered at the timing when it stops below and stops intermittently. Since the first bent bodies 72, 72 are inclined such that the free ends pointing toward the top of the sandwich 11 are directed downward, the free ends are brought into contact with the respective inclined surfaces of the sandwich 11 by the lowering of the guide bar 67. The film 13 is brought into contact with the facing film 13 and is bent toward the inclined surface. Further, when the free end of the first bent member 72 abuts on the inclined surface of the sandwich 11 with the film 13 interposed therebetween as the guide bar 67 descends, the first bent member 72 thereafter comes into contact with the support member 131. Film 1 with pivot point of the fulcrum
Swing so as to follow the inclined surface while stroking 3. As a result, as shown in FIG. 11, the film 13 facing each inclined surface of the sandwich 11 is reliably bent by each first bent body 72 along the corresponding inclined surface.

The overlapping portion of the film 13 bent along the inclined surfaces by the first bent bodies 72 and 72 and the film 13 extending outward from the bottom surface of the sandwich 11 is formed by the supporting member. The pressure is clamped by the sealing body 73 and the heating sealing body 74 disposed at the lower end of the rod 70. As a result, as shown in FIG. 17B, two linear welding seal lines 130, 130 are formed near both ends in the width direction in the vicinity of the base of the film overlapping portion, so that temporary sealing is performed. Then, the film 13 bent along the inclined surface by the first bent bodies 72, 72 is prevented from returning to the original state. The sealing member 73 is set so as to abut against the heating seal member 74 at a required pressure with the film overlapping portion interposed therebetween under the elastic action of the compression spring 71, and to perform a temporary seal on the overlapping portion reliably.

By the intermittent drive of the transfer conveyor 46,
After the holding member 53 holding the sandwich 11 reaches the downstream side of the disposition position of the second bent body 76 and stops, the support 75 descends and moves the second bent body 76 to the upstream side of the sandwich 11. Face. Next, when the second bent body 76 moves to the downstream side, the upstream side extending portions 13a, 13a extending from the inclined surface of the sandwich 11 are bent along the inclined surface (FIG. 17 ( c)). The second folded body 76 is raised at an appropriate timing at which the gripping member 53 gripping the sandwich 11 is moved toward the third folded body 80 on the downstream side by the next intermittent drive. Retreat and return to the initial standby position.

When the gripping member 53 passes through the position where the third bent body 80 is provided, the downstream side extending portions 13a, 13a extending outward from the inclined surface of the sandwich 11 are provided.
Are bent along the inclined surface by the third bent body 80 and overlap the upstream side extending portions 13a, 13a.
(See FIG. 17D). 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 disposed downstream of the position where the third bent member 80 is disposed, 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. Thus, 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. 17 (e)). 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 downwardly extending portions 13b, 13b to which the tapes 83, 83 are adhered are moved by the intermittent movement of the gripping member 53, and the inclined portions 82c, 82 of the bending guides 82, 82 are moved.
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 respective cylinders 104 are urged, as shown by the 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 packed with the film 13 is obtained (see FIG. 17F).

At an appropriate timing when the holding member 53 holding the sandwich 11 arrives at the release position due to intermittent movement and stops, the opening mechanism 60 operates to open the movable plate 55 of the holding 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-shaped 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 open end facing the inclined surface of the cylindrical film 13 wound around the main body can be bent along the inclined surface by the first bent members 72 without damaging the sandwich 11. Furthermore, since the overlapping portion of the film bent by the first bent members 72 and 72 and the film extending from the bottom surface is temporarily sealed, the film 13 does not return to the original state during the transport to the downstream side, Enables tight folding packaging.

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 first fold is placed above the upper transport path. Although the case where the bent body 72 is provided has been described, the present invention 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 first bent body 72 provided below the transport path forms an inclined surface. The opposite film opening end may be bent. While holding the sandwich 11 in the receiving position at the receiving position, the first bent body 72 provided at a position facing the top of the sandwich 11 causes the film opening end to be bent while moving the gripping member 53 horizontally. It is also possible to do it.

The first bent body 72 for bending the film 13 is not limited to the block shape shown in the embodiment, but may have other shapes and shapes, such as a plate shape, a rod shape, or a structure formed by a plurality of members. The configuration may be appropriately adopted. Further, the seal body for temporarily sealing the film is not limited to the shape and the like shown in the embodiment, but may be any of a variety of shapes such as a plurality of linear seals, dot seals, or a shape for applying a wide set seal line. Can be changed. Further, the guide bar 67 can be raised and lowered by a linear actuator system such as an air cylinder or other various operating means. Furthermore, of the pair of seals for performing the temporary sealing, the heating means may be provided not only on the lower seal but also on the upper seal, and the heating means may be provided only on the upper seal. Is also good.

[0056]

As described above, according to the film opening end bending apparatus of the present invention, the contents are exposed from the inclined surface such as a sandwich or the like with a flexible packaged object. Even so, tight folding packaging can be performed along the shape of the packaged object without damaging the contents, and 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. Change
To extend from the bottom side facing the top of the package
Between the film and the film bent by the bending member
Welding seal near the base of the overlapped part,
Film folded along more inclined surface returns
Is prevented. In addition, a welding seal is applied to the superposed part of the film.
One seal body and the other seal body forming a line are a spring.
It is abutted at the required pressure by the members, so
, A welding seal line is formed.

[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 bending and sticking 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 rear view of the tape attaching mechanism indicated by line XIII-XIII in FIG. 7;

FIG. 14 is a rear view of the bending guide and the sticking mechanism shown by the line XIV-XIV in FIG. 7;

FIG. 15 is a schematic plan view of a main part showing the transfer conveyor at a position where a bending guide is provided.

FIG. 16 is a schematic side view showing a sandwich release mechanism.

FIG. 17 is an explanatory diagram showing a process of packaging a sandwich with a film by the packaging machine according to the example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Sandwich (object to be packaged) 13 Cylindrical film 70 Support bar (supporting means) 72 First bent body (bending member) 73 Seal body 74 Heated seal body 131 Support member (supporting means)

Claims (3)

(57) [Claims] 1. A device for folding an open end of a cylindrically formed film wound in a thickness direction on a packaged object having a triangular shape such as a sandwich, wherein an inner corner of the packaged object is formed. A pair of support means are disposed so as to be able to move close to and away from each other on both sides of the inclined surface with respect to the top, which is set at approximately 90 °. One end of each of the support means is pivotally supported so as to be swingable. When the support means is moved from the top side to the inclined side, the free end of the supporting means swings in the direction of inclination of the inclined surface while rubbing the end of the film opening, thereby moving the end of the film opening. A film opening end bending apparatus comprising: a bending member configured to bend along an inclined surface. 2. A sealing member is provided at a tip of the supporting means which faces the inclined surface, and another sealing member is provided so as to face the sealing member so as to face the top of the article to be packaged. 2. The film opening end bending according to claim 1, wherein the vicinity of the base of the overlapped portion of the film extending from the surface on the bottom side and the film bent by the bending member is welded and sealed by both seals. apparatus. 3. A seal provided on said support means.
The tip of the body is formed in an inverted concave shape and the other seal body
A spring portion provided with heating means therein and disposed on the support means.
The tip of one of the seals with the top of the package
And a film extending from the bottom side surface facing the
Near the base of the overlapped portion with the film bent by the bending member
Contact the other seal with the required pressure across the side
Two pieces separated from each other in the thickness direction of the packaged object
Wherein a linear welded seal line is formed at the place.
3. The film opening end bending device according to 2.