JPH02180128A - packaging equipment - Google Patents

Abstract

PURPOSE:To effect packaging of film in a stable condition by folding shrink film over the underside of an object to be packaged and applying hot air jets to the object thus packaged to shrink the film for carry-out as final package. CONSTITUTION:A frame 1 is provided on the side of packaging part 2 with a rear folding body 12 moving reciprocally in the longitudinal direction of shrink film 7 and a lateral folding body 13 capable of opening and closing in the lateral direction thereof. Upon placement of an object 3 to be packaged on a receiving stand 5, a fixing plate 94 turns on a pivot 95 to secure the end part of the film 7 between itself and a receiving rod 93. The film is heat sealed on a carry-out belt conveyor by a heat sealer 109 and, at the same time, hot air jets are applied from a hot air outlet opening 131 to the packaged object to shrink the film 7 for tightening the package and it is carried out by the carry-out belt conveyor 110.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to packaging objects, particularly foodstuffs and other products in trays or other containers, with heat-shrinkable plastic films, so-called shrink films. Related to packaging equipment.

[Prior Art] A conventional packaging device presses the packaged item against the packaging film by pushing up the packaged item supplied to the pedestal toward the packaging film that is supplied to the packaging section and stretched. A method has been proposed in which the packaging film is held under tension while the packaging film is folded under the packaged object using a folding tool, and then the packaged product is transported out.

For example, as a device of this type,
No. 2 is proposed. This is the upper and lower 1! which are inclined so that the leading sides touch each other! ! A series of packaging films, which are not perforated in the gap path between the end belts, are fed by a guide roll, and the packaging film reaches the contact area of said belts, so that the packaging film travels at a higher speed than the guide rolls. The packaging film is separated and cut along the perforations from the subsequent series of packaging films, and the packaging film separated and cut in this way is sent to the packaging unit position by an endless belt. In this state, the packaged item is pushed up from the bottom side of the film to stretch the film, and then the film is folded into the bottom of the packaged item using a packaging film folding tool, and the package is folded and wrapped in this way. is carried out by the carrying out device.

[Problems to be Solved by the Invention] In the above-mentioned prior art, when pushing up the packaged item from the lower side of the film and folding the film into the bottom part using a folding tool, the elongation of the film may occur due to differences in the temperature and humidity of the outside air. However, as a result, it may not be possible to properly package the film wrapped in the package.

Therefore, an object of the present invention is to provide a packaging device that can package films in a stable state.

[Means for Solving the Problems] The present invention provides a film cutting device for perforating a shrink film, a film feeding device for transporting the shrink film to a packaging section position, and a film supply device provided corresponding to the packaging section position. a pedestal elevating mechanism that moves the pedestal up and down, a packaged object supply device that transfers the packaged object onto the pedestal, and a film folding device that folds the shrink film under the packaged object at the packaging section position. , an unloading device for unloading the package in which the film is folded, and a warm air supply device installed on the unloading route of the unloading device and blowing warm air onto the package to shrink the shrink film. .

[Example 1] Figures 1 and 2 show an overview of the overall configuration. On the front side of the main body frame 1, the packaged object 3 is transported to the lower part of the packaging section 2, which is approximately the middle part of the main body frame 1. A packaged article supplying device A is provided with a conveyor 4 for carrying out the packaging.

At the supply side end of the conveyor 4, a pedestal 5 is disposed on which the articles 3 to be packaged are placed by the conveyor 4, and this pedestal 5 is connected to a lift 6 which is moved up and down by a drive unit as appropriate In addition, a pedestal elevating device [B] that stretches and holds the shrink film when the pedestal 5 is raised is formed.

A roll body 8 in which a shrink film 7 is wound in a roll shape is rotatably held on the rear side of the main body frame 1, and both ends of the shrink film 7 pulled out from the roll body 8 are connected to a pair of upper and lower ends. A film feeding device C that is inserted into the endless belt 9 and transported to the packaging section 2 position.
are arranged on both sides of the upper part of the main body frame 1 in the front-rear direction. At the end of the endless belt 9 on the insertion side of the shrink film 7, there is a film cutting device consisting of a cutter 10 for perforating the shrink film 7 in the width direction, and a film presser 11 provided on both sides of the cutter 10. is provided.

A shrink film 7 is placed on the packaging section 2 side of the main body frame 1.
A rear folding body 12 that reciprocates along the length direction and left and right folding bodies 13 that can be mutually opened and closed along the width direction of the shrink film 7 are provided, and as each folding body 12.13 moves, the shrink film A film folding device E is provided on the bottom surface of the packaged object 3 which is cut from the perforation position 7 and pushed up by the pedestal lifting device B.

On the upper side of the main body frame 1, a carry-out device F is provided, which includes a carry-out belt 14 that moves forward in contact with the upper surface of the package 3a, and a transfer body 15 on which the package 3a is placed and transferred. .

The unloading device F is provided with a hot air supply device WG that blows hot air toward the unloading route.

The packaged objects 3, such as trays containing products, are shown in Figures 8 (A) to (C).
), the conveyor 4 of the packaged article supply device A transports the packaged articles from the front side of the main body frame 1 to the lower part of the packaging section 2 at an approximately middle portion, and supplies the packaged articles to the receiving table 5 . This packaged item 3
At the same time as the shrink film 7 is transferred from the roll body 8 by the film supply device C, the shrink film 7 is transferred to the main body frame 1.
The film is transported from the rear side toward the packaging section 2 while being sandwiched between a pair of upper and lower endless belts 9, and during transport, perforations 16 are formed by the cutter 10 of the film cutting device. A series of shrink films 7 having perforations 16 formed therein as shown in FIGS. 8(A) to 8(C) are further transported to the packaging section 2 position.

In this manner, as shown in FIG. 8(C), the article to be packaged 3 is supplied onto the pedestal 5, and a series of shrink films 7 with perforations 16 are supplied to the packaging section 2 position. As shown in FIGS. 8(D) to (F) and 9(A) to (C), the pedestal 5 is raised by the lift 6 of the pedestal lifting device B, and the shrink film 7 supplied to the packaging section 2 position is lifted. It is pushed up from below and stretched, and then the rear folding body 12 and the left and right folding bodies 13 slide along the bottom surface of the pushed up object 3 to be separated from the sewing machine 116, and the edges of the shrink film 7 are folded. to form a package 3a, and this package 3a is attached to the delivery belt 14 as shown in FIG. 8 (1(H)).
and the transport body 15 to carry it out to the front side of the main body frame 1.

At this time, hot air from the warm melon supply device G is blown onto the package 3a on the delivery path as shown by the arrow in FIG. 8(H), and the shrink film 7 is shrunk to 28J2.

More specifically, in the packaged article supplying apparatus A shown in FIG. While the tray 18 is placed on the fixed plate 19, it is transferred by the L-shaped projecting plate 20 and pushed onto the pedestal 5. The projecting plate 20 is fixed to a pair of endless chains 4a of the conveyor 4 connected by a motor 21 with a brake and a chain 22, which move at a preset speed so as to supply the objects 3 to be packaged, by means of screws 23, in plural sets at equal intervals. Then, the projecting plate 20 moves along a guide well 24 formed on the fixed plate 19. The fixing plate 19 is provided with a switch 25 for detecting the supply of the tray 18 and a switch 25a for transferring the tray 18 onto the pedestal 5 in two steps.
When it is not supplied, it stops, and when it is supplied, it is transferred to the pedestal 5 in two steps.

In the film supply device C shown in FIG. The film is guided between a pair of upper and lower film feeding rubber rollers 29 and 30 that are rotatably installed on the main body frame 1.

On the front side of the film feeding rubber rollers 29 and 30, a pair of upper and lower conveyor 9 drive and film feeding rubber rollers 31, 32 are mounted on the main body frame 1 at the same height as the film feeding rubber rollers 29, 30 at intervals. A pair of upper and lower rollers 33 and 34 for the conveyor 9 are rotatably supported on both front side surfaces of the main body frame 1. A pair of upper and lower endless belt conveyors 35, 36 are installed between the belt guide portions on both sides of the rubber rollers 31, 32 and the rollers 33, 34, respectively. A plurality of shafts 37 that press the upper conveyor belt 35 from above are supported on the side surfaces of the main body frame 1, and upper and lower shafts 37 that guide the film feeding running sections 35a and 36a of the pair of upper and lower endless belt conveyors 35 and 36 are supported. A plurality of rollers 38 are pivotally supported on the sides of the main body frame 1. A roller 38 is provided at the bottom of the main body frame 1 to count the sine waveform of a pulse generator (not shown) attached to the rear of the motor and determine the film feed length using a clutch. A motor 39 with a clutch brake is provided, and a drive gear 40 of this motor 39, a gear 41.42 provided coaxially with the film feeding rubber roller 29, 30, and a rubber roller 31, 32 for driving the conveyor 9 and film feeding. Gears 43 and 44 provided coaxially are connected to each other by a timing belt 45, and the timing belt 45 is connected to the upper gear 41.
．． 43, the inner side of the lower gears 42 and 44, and the drive gear 40 are sequentially engaged.

Therefore, the motor 39 rotates intermittently at a pitch of the film feed length preset by adjusting the pulse generator, and the rotation of the motor 39 causes the film to be fed through the timing belt 45 and the gears 41, 42, 43, 44. The feeding rubber rollers 29, 30, conveyor drive, and film feeding rubber rollers 31, 32 rotate, and the conveyor 9 is driven. Therefore, the series of shrink films 7 pulled out from the roll body 8 are guided by the guide rollers 27 and 28 in a continuous state, and are guided by the pair of upper and lower rubber rollers 2.
9.30 and rubber rollers 31.32, and both ends of the shrink film 7 are sandwiched between the film feeding running portions 35a and 36a of a pair of upper and lower endless conveyor belts 35.36. Transport intermittently.

In the film cutting device shown in FIG. 4, a cutter receiver 46 is positioned between the film feeding rubber rollers 29 and 30 and the conveyor driving and film area rubber rollers 31 and 32 to transport the shrink film. 7 is fixedly installed on the main body frame 1.

A cutout 47 is formed on the lower surface of the cutter receiver 46, and a cutter 10 that forms a perforation 16 on the lower side of the shrink film 7 corresponding to the cutout 4γ is fixed on the receiver 48. A receiving plate 51 is disposed on both sides of the cutter 10 on the cutter 10 so as to elastically move up and down via a guide rod 49 and a spring 50. In this case, guide rods 49 vertically disposed on both sides of the receiving plate 51 cover the springs 50 and are inserted into the receiving rods 48, forming a retaining portion 52 at the lower part thereof. A pair of guide rods 53 are vertically installed on the receiving rod 48, and the guide rods 53 are supported by bearings 55 on the frame 54 side fixedly provided on the main body frame 1 so as to be able to rise and lower, and are mounted on a mounting plate 56. The drive shaft of the provided motor 57 and the lower surface of the receiving rod 48 are connected by a crank 58,
Driven by the motor 57, the receiving rod 48 is guided by the guide rod 53 via the crank 58 and moves up and down. Therefore, the state in which the shrink film 7 is stopped, that is, the object to be packaged 3
When the shrink film 7 is stopped at a size sufficient to wrap the cutter 1, the cutter 1 is
The receiving plates 51 provided on both sides of the shrink film 7
is resiliently held on the cutter receiver 46 side, and at the same time, the cutter 10 cuts into the shrink film 7 to form perforations 16. Furthermore, a screw punch 60 pivotally supported by a bearing 59 fixed to the main body frame 1 side is screwed onto the mounting plate 56 of the motor 57, and the height of the mounting plate 56 can be adjusted by rotating the screw punch 60. 1 A cutting amount adjustment handle 61 is rotatably supported by a bearing 62 at the front of the main body frame 1, and the adjustment handle 61 and the screw punch 60 are connected to the transmission gear 6.
3.64.

When the adjustment handle 61 is rotated, the transmission gears 63 and 64 are engaged, and the screw punch 60 is rotated, and the mounting plate 5 is rotated.
6 goes up and down. This movement of the mounting plate 56 changes the height of the motor 57 and the upper limit position of the cutter 10, thereby changing the cutting depth of the perforation 16.

In the pedestal lifting device B shown in FIG.
A pedestal 5 is disposed below the packaging section 2 , and a guide rod 65 vertically disposed on the pedestal 5 is supported by a bearing 66 fixed to the main body frame 1 so as to be able to rise and fall, and is connected to the drive shaft of a motor 67 . It is connected to the pedestal 5 through a crank 68.

Driven by the motor 67, the cradle 5 moves up and down while being guided by the guide rod 65 via the crank 68.

When the article 3 to be packaged is supplied and placed on the pedestal 5 and the pedestal 5 is pushed up by the drive of the motor 67, the shrink film 7 supplied to the packaging section 2 becomes tense. The pedestal 5 is formed by a plurality of substantially inverted-shaped mounting members 69 arranged on the left and right, each mounting member 69 is pivotally supported on a holder 70 so as to be rotatable toward the center, and each mounting member 69 is supported by a spring. 71
Due to the biasing force, it is always kept in a vertical state to form a placement section for the object to be packaged 3. In that case, a plurality of mounting members 69 integrally formed on the same shaft are pivotally mounted on the receiver 70 by a pivot 72, and a stopper 73 that is biased by a spring 71 and stops in a vertical state is placed on the receiver 70 side. It is provided.

In the film folding device E shown in FIGS. 2 and 5, the left and right folding bodies forming part of a pair of left and right folding bodies 13 are disposed on the lower surface side of a fixing plate 74 installed on the main body frame 1 on the rear side of the packaging section 2 position. The base ends of the tools 75 are supported by pivots 76 so as to be rotatable in the horizontal direction, and rails 77 are provided in the front and back direction on both sides of the main body frame 1 at the packaging section 2 position, and each of the rails 77 has a movable body 78. provided, this moving body 7
Both ends of a rear folding tool 79 constituting a part of the rear folding body 12 are fixed to the left and right folding tools 75, and a guide eraser 80 whose base side is curved inward in the length direction is formed on the left and right folding tool 75. A guide roller 81 provided on the rear folding tool 79 engages with the guide eraser 80, and as the rear folding tool 79 operates, the rear folding tool 79 and the left and right folding tools 75 move forward in synchronization with each other.
Wrapping on the pedestal 5 due to the closing action! T! It is formed so as to perform a so-called three-way folding action in which the rear and both sides are interlocked with each other with respect to t13. More specifically, a torque motor 82 is provided below the main body frame 1, and the movable body 78 is connected to the drive shaft of the torque motor 82 via a crank 83. When the stand 5 is pressed against the shrink film 7 supplied to the packaging section 2 position, the rear folding tool 79, which constitutes a part of the rear folding body 12, is moved through the crank 83 by the drive of the torque motor 82 to the movable body 78, It moves forward guided by the rails 77. As the rear folding tool 79 moves, the shrink film 7 is separated from the perforation 16, and guided by the guide eraser 80 and guide roller 81, the left and right folding tools 75 rotate toward the center around the pivot 76 and are pushed up. It moves along the bottom surface of the object to be packaged 3 and folds in the edges of the shrink film 7 from three sides to form a package 3a. In this case, a plurality of mounting members 6 forming pedestals etc.
9 is pressed by the left and right folding tools 75 and rotates toward the center, allowing the folding tools 75 to 76 to move. Furthermore, a pair of long grooves 84 are formed in the folding tool 79 of the rear folding body 12 in a V-shape, and a sliding piece 85 shorter than the long groove 84 is inserted into each long groove 84. A screw 87 with a handle 86 for fixing the sliding piece 85 to the rear folding tool 19 is screwed thereon, and the guide roller 81 is pivotally supported on the lower surface of the end side of the sliding piece 85. Therefore, the handle 86 is tied and the sliding piece 85 is inserted into the long groove 8.
4, a pair of guide rollers 81
The folding width of the left and right folding tools 75 can be adjusted. Furthermore, an engaging portion 88 is formed protruding from the tip of the left and right folding tool 75.

Film fixing device I shown in Figures 3 and 6 (A) and (B)
In I, a pair of upper and lower endless conveyor belts 35 and 36 are attached to the main body frame 1 side at a location where the left and right folding body 13 engages with the engaging portion 88 protruding from the tip of the left and right folding tool 75 when the left and right folding body 13 is in a standby state. Feeding traveling section 35a, 3
An L-shaped arm 89 for pushing up the shrink film 7a from below is rotatably provided by a pivot 90, and a pressing force is applied to one end of the L-shaped arm 89 to push up the film feeding traveling section 35a36a and suppress the shrink film 7 from being pulled out. roller 9
1, and an engagement roller 92 that engages with the engagement portion 88 and rotates the L-shaped arm 89 in a direction to push up the pressure roller 91 is provided on the other end side. In this case, the suppression roller 9
Even if the running portions 35a and 36a are pushed up by the above-mentioned conveyor belt 1, the shrink film 7 is smoothly transported by the pair of upper and lower end-shaped conveyor belts 35 and 36.

A support rod 93 is installed on the main body frame 1 at a position slightly above the shrink film 7 on the front end side of the film feeding traveling portions 35a and 36a, and a support rod 93 is installed in the lower position of the shrink film 7 corresponding to the support rod 93. A fixing plate 9 to which rubber or the like is pasted to clamp and fix the tip side of the shrink film 7
4 is arranged, and its fixing plate 94 is fixed to a pivot shaft 95 rotatably installed on the main body frame 1. One end of a link 96 is fixed to the pivot shaft 95, and the L end of the link 96 drives a torque motor 97. Link 98 and engagement groove 9 provided on the shaft
9 via an engagement roller 100. Therefore, when the link 98 is rotated by the drive of the torque motor 97, the link 98 is rotated through the engagement roller 100 and the engagement groove 99.
6 rotates to rotate the pivot 95, whereby the fixing plate 94 fixed to the pivot 95 rotates and clamps and fixes the front end side of the shrink film 7 to the receiving rod 93.

On the rear end side of the endless conveyor belt 35, 36, there is a pair of upper and lower parts that press the film feeding running parts 35a and 36a from both the upper and lower sides to prevent the shrink film 7 from being pulled out in the vicinity of the rear side of the perforation 16. Suppression roller 10
1 is arranged, and this pressing roller 101 is provided on a moving body 102, and the moving body 102 is slidably provided on rails 103 provided in the front-rear direction on both sides of the main body frame 1, and parallel to the rails 103. A rack rod 104 is provided below the rail 103 so as to be slidable in the front and rear direction, and the movable body 102 is fixed to the rack rod 104.
A motor 106 is attached to the rack teeth 105 of the rack rod 104.
The pinion 108 meshes with the drive gear 107 of the motor 106, and the drive gear 107 and the pinion 108. The rack rod 104 slides through the rack teeth 105 to move the movable body 102 along the rail 103.

In this case, the motor 106 is connected to a clutch-brake motor 39 that determines the film feed length of the film supply device C, and the pressure roller 101 is movably installed so that it is always located near the rear side of the perforation 16. ing. 11! In the unloading device F, the unloading belt 14 is disposed at the rising standby position of the packaged object 3 placed on the pedestal 5, and the package 3a with the shrink film 7 folded on three sides by the folding body 12.13 is attached to the unloading belt 14. 14 onto a transfer body 15 containing a heat sealer 109, and during this transfer, the front end of the shrink film 7 is transferred to a tray 18.
The shrink film 7 is folded under the film, and then sealed by the transfer body 15. At the same time, the shrink film 7 is shrunk and tensed by hot air from the warm supply device fiG, and then sent out by the delivery belt 110. The above-mentioned delivery belt 14 is a conveyor belt, and the hook is passed around a pair of front and rear rollers 112 which are rotatably supported on a frame 111, and the frame 111 is supported by a four-bar parallel link 81 and a treetop 113 so as to be able to move up and down in parallel. The moving shaft of a motor 115 installed on the body 114 and the axis of the rear roller 112 are connected by a belt 116 and a gooey 117. 1
18 is screwed onto a screw punch 119 rotatably provided, and the screw punch 11
The receiver 11 is rotated by rotating the handle 120 provided on the receiver 9.
4 is formed so that it can be raised or lowered to match the size and quantity of the object 3 to be packaged. The transfer body 15 is composed of a plurality of carry-out rollers 121 and a carry-out belt conveyor 122 arranged at a height where the package 3a can be placed in correspondence with the front end of the carry-out belt 14, and a heat sealer is installed on the side of the carry-out belt conveyor 122. 109 is built-in. The above-mentioned carry-out roller 121 and feed roller 1 of the carry-out belt conveyor 122
26 refers to the drive shaft of the motor 123, the gear 124, and the belt 1.
25, and the feed roller 1 of the feed belt 110
26 and the drive shaft of the motor 127 are the gear 128 and the belt 1.
It is connected by 29.

As shown in FIG. 7, the hot air supply device G is provided with a heater and a fan (not shown) inside a case 13G, and a hot air outlet 131 is provided on the lower surface of the case 130. The case 130 is suspended and fixed by screws 134 via a shaft 133 to the upper ends of support rods 132 erected on both sides of the frame 15A of the transfer body 15, and the hot air outlet 131 is oriented toward the top of the transfer body 15. It is oriented to blow warm air diagonally downward. Further, the heater and fan inside the case 130 are energized at the same time as the transport body 15 is driven.

Next, to explain the packaging order according to the flowchart in FIG. 10, the tray 18 carrying the products 17 is
9, when supplied manually or automatically, switch 25
is turned on, thereby operating the conveyor 4, and the projecting plate 20, which is not fixed to the t'#I'fA-shaped chain 4a of the conveyor 4, pushes the tray 18, causing the tray 18 to slide onto the fixed plate 19. while moving toward the packaging section 2 position. Simultaneously with the operation of the conveyor 4, the film feeding rubber roller 2930 and the conveyor 4 are operated at a feed amount preset by adjusting the pulse generator, and the shrink film 7 pulled out from the roll body 8 is fed one step. At this point, the motor 57 operates and the crank 5
The receiving rod 48 is raised and lowered via the front and rear receiving plates 51, and the shrink film 7 stretched between the rubber rollers 29 and 30 for film feeding and the rubber rollers 31 and 32 for driving the conveyor 4 and feeding the film is elastically moved. The cutter 10 makes a cut in the state where they are tightly pinched, and a perforation 16 is formed.

Next, the pair of rubber rollers 29, 30 and the conveyor 9 are operated to transport the series of shrink films 7 with the perforations 16 one more step to supply the shrink films 7 to the packaging section 2. In this case, the shrink film 7 is a pair of rubber rollers 29, 30 and 3.
A running portion 35 for film feeding of an endless conveyor belt 35 and 36 which is sandwiched between 1° and 32° and has a pair of upper and lower edges on both sides.
a, 36a, and are supplied to the packaging unit 2 position, and guide both ends of the film feeding running sections 35a, 36a in a meandering manner. A plurality of upper and lower rollers 38 and a pair of upper and lower pressing rollers 91. By engaging with the engaging portion 88 of the left and right folding body 13 in the waiting #i state, the traveling portions 35a, 36
It is pressed by the engagement roller 92 that presses the part a. In addition, in the positional relationship where the supply of the series of shrink films 7 with perforations 16 is completed, the pair of upper and lower pressing rollers 101 are installed so as to be guided and movable on the rails 103, and are moved to a position near the rear side of the perforations 16. It is set. Thereafter, the tray 18 carrying the products 17 is transferred from the end of the conveyor 4 onto the pedestal 5 and placed thereon.

At the same time that the packaged object 3 is placed on the pedestal 5 in this manner, the fixing plate 94 rotates around the pivot 95 and clamps and fixes the front end of the shrink film 7 between it and the holder 93. The lift 6 operates and the pedestal 5 is guided by the guide rod 65 and rises, pushing up the shrink film 7 supplied to the packaging section 2 from the lower surface side and stretching the shrink film 7.
Next, the rear folding body 12 moves forward guided by the rails 77 to separate the shrink film 7 from the sewing machine 116, and in conjunction with the rear folding body 12, the left and right folding bodies 13 are moved forward to form a mounting portion for the cradle 5. The mounting member 69 is attached to the spring 71.
The shrink film 7 is folded into the bottom of the tray 18 from three sides and the packaging body 3a is placed on the rear folding body 13. In this case, the pressing roller 101 fixes and holds the vicinity of the perforation of the film 7 to be fed in the next operation, so that cutting from the perforation 16 is good, and the rotation of the left and right folding bodies 75 engages the engaging portion 88. The folding is performed because the mating roller 92 is disengaged and the pressing roller 91 is released.

Thereafter, the pedestal 5 is lowered, and the fixing plate 94 that fixes the front end of the shrink film 7 also returns to release the fixation. At the same time, the carry-out belt 14 and the carry-out roller 121
, the carry-out belt conveyor 122 and the feed-out belt 110 operate, and at the same time, the heater and fan of the warming device G are energized, and the carry-out belt 14 transfers the upper surface side of the package 3a, and the carry-out roller 121 transfers the lower surface side of the package body 3a. 3a onto the delivery belt conveyor 122 of the transfer body 15. As a result, the shrink film 7 on the front side of the tray 18 also
The conveyor belt 12 is folded into the lower side of the
At the same time, warm air is blown toward the package 3a from the hot air outlet 131 of the hot air supply device G, and the shrink film 7 of the package 3a contracts and becomes taut. It is then transported out by a delivery belt 110.

Thereafter, the folding bodies 75, 79 return to their original positions. In this way, it is possible to continuously supply products packaged in a film tensioned state with no wrinkles on the surface of the package.

FIG. 11 shows another embodiment of the present invention, in which a delivery belt 110 is provided in the same direction as the delivery belt conveyor 122 of the transfer body 15, and on this delivery belt conveyor 122 there is an exterior body 134. tunnel-like room 1
35 is formed, and this room 135 is provided with a hot air supply device G. Then, when the package 3a passes through a tunnel-shaped room 135 while being carried out by the delivery belt 110 via the transfer body 15, the shrink film 7 is contracted and tensed by the hot air from the hot air supply bag ff1G.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. The hot air may be supplied intermittently at appropriate intervals, or may be supplied continuously.
In addition, various types of hot air supply devices can be selected as appropriate.
Moreover, instead of the carrying-out belt, a reciprocating carrying-out body proposed in Japanese Utility Model Application Publication No. 63-171302 may be used.

In addition, an explanation was given using an example of a device that cuts the shrink film from the perforations when folding the film.
As known from Japanese Patent No. 192, the film may be cut before folding.

[Effects of the Invention] The present invention includes a film cutting device for perforating a shrink film, a film supply device for transporting the shrink film to a packaging section position, and a pedestal provided corresponding to the packaging section position. A pedestal lifting mechanism that moves up and down, and the above-mentioned 4
.

A packaged article supply device that transfers the packaged article onto a pedestal, a film folding device that folds the shrink film under the packaged article at the packaging section position, and a carry-out device that carries out the package in which the film is folded. and a warm air supply device installed in the carry-out route of the carry-out device and blowing hot air onto the packaging body to shrink the shrink film, thereby providing a packaging device capable of wrapping the film in a stable state.

[Brief explanation of the drawing]

Fig. 1 is an overall vertical sectional view, Fig. 2 is an overall plan view, Fig. 3 is a front view showing the packaged material supply device and the pedestal lifting device, Fig. 4 is a front view of the film cutting device, and Fig. 5 is a front view of the film cutting device. The figure is an exploded perspective view of the film folding device, FIG. 6 (A>(B) is a front view of the pressing roller mechanism, and FIG. 7 is a perspective view of the main parts showing the hot air supply device.
Figures 8 (A) to (H) and Figures 9 (A) to (C) are operation state diagrams showing the packaging state, Figure 10 is a flowchart diagram, and Figure 11 is an embodiment of the pond of the present invention. FIG. 3 is a perspective view of main parts. 2... Packaging section 3... Item to be packaged 3a... Packaging body 9... Endless belt 10...
Cutter 12.13...Folding body A...Packaged object supply device B...Passage lifting device C...Film supply device D...Film cutting device E...Film folding device F.・・Unloading device G・・・Hot air supply device

Claims (1)

[Claims] (1) A film cutting device that makes perforations in the shrink film, a film supply device that transports the shrink film to the packaging section position, and a pedestal that moves up and down a pedestal provided corresponding to the packaging section position. an elevating mechanism; a packaged article supply device that transfers the packaged article onto the pedestal; a film folding device that folds the shrink film onto the underside of the packaged article at the packaging unit position; and a package in which the film is folded. 1. A packaging device comprising: a carry-out device for carrying out the package; and a hot air supply device provided on the carry-out path of the carry-out device and blowing hot air onto the package to shrink the shrink film.