JPH0624321Y2 - Packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a packaging device for packaging foodstuffs or other products placed in a tray or other container with a packaging film.

[Prior Art] Conventionally, as an apparatus of this type, the object to be packaged is pushed against the packaging film by pushing up the object to be packaged supplied to the cradle toward the packaging film which is supplied to the packaging section and stretched. It has been proposed that the packaging film be folded under the article to be packaged by a folding tool while the packaging film is held in a tensioned state, and then the packaged article is carried out.

For example, as a device of this type, Japanese Examined Patent Publication No. 50-15192.
Japanese Patent Publication has been proposed. This is a series of packaging films perforated in the gap between the upper and lower endless belts inclined so that the leading sides contact each other is fed by a guide roll, and the packaging film is fed to the contact portion of the belt. Upon reaching, the wrapping film is fed at a speed that is no longer than the guide roll, and is separated and cut along a perforation from a series of the following wrapping film, and the separated and cut wrapping film is an endless belt. Is sent to the packaging section position. In this state, the article to be packaged is pushed up from the lower side of the film to stretch the film, and then the film is folded into the bottom of the article to be packaged by the folding tool of the packaging film, and thus the packaged article is folded and wrapped. The item is unloaded by the unloading device. Also, JP-A-61-16
Japanese Patent No. 4914 discloses that a perforation having an even cut amount is formed in the width direction of the packaging film, the packaging film having the perforation is transferred to a packaging portion position, and the packaging film is packaged with the object to be packaged. There has been proposed a wrapping machine that presses the sheet to make it tense, cuts the film from the perforations with the film folding device, and folds the film below the object to be packaged.

[Problems to be Solved by the Invention] As described in Japanese Patent Publication No. 50-15192, the perforation is formed in the packaging film, and then the packaging film is pulled to separate and cut from the perforation. Although there is no problem with a film that is easy to break, if a film that does not stretch and is relatively easy to tear, such as a film made of a resin such as polypropylene, is used, pulling the film to separate and cut it from the perforations causes the packaging film to start from the middle of the perforations. There was a problem of breaking.

This is a case where a small branch line is made in the perforation formed by the cutter, or when the tensile force of the film causes a branch line, the branch line is cut before the perforation is cut. It seems to be disconnected from.
That is, the packaging film is usually cut from the end of the perforation toward the center, but is broken from the branch cut line with a tensile force smaller than that at the end of the perforation.

Also in the above-mentioned Japanese Patent Laid-Open No. 61-164914, since the cut amount of the perforations is constant, when a film that easily tears is used, the perforations that are subjected to a tensile force by pressing the packaged item are used. There is a possibility that a branch-shaped cutting line may be formed on the center side, and there is a concern that the cutting line spreads and good cutting cannot be performed.

Therefore, an object of the present invention is to provide a packaging device that can be cut well from perforations even when a tearable film is used.

[Means for Solving the Problems] The present invention is provided so as to be able to move up and down in order to make a notch in a packaging film, and the notch on both ends in the width direction of the packaging film is the notch on the central side. A film cutting device having a cutter that sets the width of the cutter teeth and the position of the toothbrush so as to be larger and inserts continuous perforations in the width direction, and film supply that transfers the packaging film to the packaging position. Device, a package supply device for transferring the package to the receiving table, a platform elevating device for vertically moving the platform on which the package is placed, and a perforation by the lifting operation of the film cutting device. After the packaging film having formed the above is supplied to the packaging portion position by the film supply device, at least the film fixing device that clamps the leading end side in the transport direction of the packaging film, and the receiving device with the leading end side clamped. The pedestal lifting device raises the cradle on which the object to be packaged is placed to the position of the wrapping part, and the object to be packaged pushes up the widthwise center of the packaging film to make it tense, and the tense film is cut from the perforations. Then, a film folding device having left and right folding parts which are folded below the article to be packaged, and a device for carrying out the article to be packaged which carries out the article to be packaged folded by the film folding device are provided.

[Embodiment] FIG. 1 and FIG. 2 show the outline of the overall structure, in which the object to be packaged 3 is transferred to the front side of the main body frame 1 to the lower part of the position of the wrapping section 2 which is substantially the middle part of the main body frame 1. An object-to-be-packaged supply device A provided with a conveyor 4 for performing is provided.

At the end of the conveyor 4 on the supply side, a receiving table 5 on which the article 3 to be packaged is supplied and placed by the conveyor 4 is arranged. The receiving table 5 is appropriately connected to a lift 6 which is vertically moved by a drive unit, In addition, a cradle lifting device B that extends and holds the film when the cradle 5 is raised is formed.

On the rear side of the body frame 1, a roll body 8 in which a packaging film 7 is wound in a roll shape is rotatably held, and the packaging film 7 pulled out from the roll body 8.
A film supply device C for sandwiching both side end portions of the upper and lower endless belts 9 into the pair of upper and lower endless belts 9 and transporting them to the position of the packaging portion 2 is arranged in the front and rear direction on both upper sides of the main body frame 1. A cutter for perforating the end of the packaging film 7 of the endless belt 9 in the width direction of the packaging film 7 such that the depth of cut on both ends of the endless belt 9 is larger than the depth of cut on the center side. A film cutting device D including a film pressing device 11 provided on both sides of the cutter 10 is provided.

On the packaging portion 2 side of the main body frame 1, a rear folding body 12 that reciprocates along the length direction of the film 7 and a left and right folding body 13 that can be opened and closed along the width direction of the film 7 are provided.
A film folding device E for cutting the film from the perforated position of the film 7 as the folding bodies 12, 13 are moved and folding the film on the bottom surface of the package 3 pushed up by the cradle lifting device B is provided. There is.

On the upper side of the main body frame 1, there is provided a carry-out device F including a carry-out belt 14 that comes into contact with the upper surface of the packaging body 3a and moves forward and a transport body 15 on which the packaging body 3a is placed and transported. .

Items to be packed 3 such as product-containing trays are shown in FIG.
As shown in (C), it is transferred from the front side of the main body frame 1 to the lower side of the wrapping section 2 in the substantially middle portion by the conveyor 4 of the article supply apparatus A, and is supplied and placed on the receiving table 5. Simultaneously with the transfer of the object to be packaged 3, the packaging film 7 pulled out from the roll body 8 by the film supply device C is the main body frame 1
It is transported from the rear side toward the packaging portion 2 position while being sandwiched between the pair of upper and lower endless belts 9, and the perforation 16 is formed by the cutter 10 of the film cutting device D during the transportation. As shown in FIGS. 8A to 8C, the series of packaging films 7 on which the perforations 16 are formed are further transported to the packaging section 2 position.

In this manner, as shown in FIG. 8 (C), the object to be packaged 3 is supplied onto the receiving table 5, and a series of the packaging film 7 having the perforations 16 is supplied to the packaging section 2 position. ,
As shown in FIGS. 8 (D) to (F) and FIGS. 9 (A) to (C), the cradle 5 is lifted by the lift 6 of the cradle lifting device B, and the packaging film 7 is supplied to the position of the packaging unit 2. Is pushed up from below to extend, and then the rear folding body 12 and the left and right folding bodies 13 are slid along the bottom surface of the packaged article 3 having been pushed up to form perforations.
16 and the wrapping film 7 is folded to form the wrapping body 3a. The wrapping body 3a is composed of a carrying belt 14 and a transfer body 15 as shown in FIGS. 8 (G) and 8 (H). It is carried out to the front side of the frame 1.

More specifically, in the object-to-be-packaged supply A shown in FIG. 3, the object to be packaged 3, which is a tray 18 on which foodstuffs and other products 17 are placed, extends from the front side of the body frame 1 to the middle of the body frame 1. The tray 18 is moved toward the side, and while the tray 18 is placed on the fixed plate 19, the tray 18 is transferred by the L-shaped projecting plate 20 and pushed out onto the pedestal 5. The veneer 20 is a motor with a brake that advances at a preset speed so as to supply the article 3 to be packaged.
A plurality of sets are fixed to the pair of endless chains 4a of the conveyor 4 connected by 21 and the chains 22 with screws 23 at equal intervals, and the projecting plates 20 thereof move along the guide grooves 24 formed in the fixed plate 19. The fixed 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 the tray 18 is not supplied, the switch 25 is stopped and supplied. When it is done, it is transferred to the cradle 5 in two steps.

In the film supply device C shown in FIG. 1, the packaging film 7 pulled out from the roll body 8 rotatably held on the rear side of the main body frame 1 has two guide rollers 27,
It is guided to the upper side of the main body frame 1 by 28 and is guided between a pair of upper and lower rubber rollers 29, 30 for film feeding which are rotatably installed on the main body frame 1. On the front side of the film feeding rubber rollers 29, 30, the pair of upper and lower conveyors 9 are driven and the film feeding rubber rollers 31, 32 are spaced apart from each other on the main body frame 1 at the same height as the film feeding rubber rollers 29, 30. A pair of upper and lower rollers 33, 34 for the conveyor 9 are installed on both sides of the main body frame 1 on the front side.
Is rotatably supported. A pair of upper and lower endless conveyor belts 35 and 36 are bridged between the belt guide portions on both sides of the rubber rollers 31 and 32 and the rollers 33 and 34, respectively. A shaft 37 for pressing the upper conveyor belt 35 from above supports the side surfaces of the plurality of main body frames 1, and a pair of upper and lower endless conveyor belts 35, 36 for guiding the film feeding traveling portions 35a, 36a. Rollers 38 are pivoted on the sides of the body frame 1. A motor 39 with a clutch brake for counting the waveform of a pulse generator (not shown) attached to the rear of the motor to determine the film feed length with a clutch is provided at the bottom of the body frame 1. The drive gear of this motor 39 40, gears 41, 42 coaxially provided on the film feeding rubber rollers 29, 30 and driving of the conveyor 9 and film feeding rubber rollers 31,
The gears 43 and 44 coaxially provided on the 32 are timing belts.
The timing belt 45 is sequentially wound around the outer side of the upper gears 41 and 43, the inner side of the lower gears 42 and 44, and the drive gear 40. Therefore, the motor 39 intermittently rotates at a pitch of the film feed length preset by the adjustment of the pulse generator, and the rotation of the motor 39 causes the timing belt 45 and the gears 41, 42, 4 to rotate.
The film feeding rubber rollers 29 and 30 and the conveyor are driven via 3 and 44, and the film feeding rubber rollers 31 and 32 are rotated and the conveyor 9 is driven. Therefore, the series of wrapping film 7 pulled out from the roll body 8 is guided by the guide rollers 27 and 28 in a continuous state, and a pair of upper and lower rubber rollers are provided.
It is sequentially fed between the rubber rollers 29 and 30 and between the rubber rollers 31 and 32, and both side edges of the packaging film 7 are sandwiched between the film feeding running portions 35a and 36a of the pair of upper and lower endless belt conveyors 35 and 36. Transport intermittently.

In the film cutting device D shown in FIG. 4 (A), for the packaging in which the cutter receiver 46 is transferred between the film feeding rubber rollers 29 and 30 and the conveyor driving and film feeding rubber rollers 31 and 32. It is fixedly installed on the body frame 1 on the upper side of the film 7. A groove 47 is formed on the lower surface of the cutter receiver 46, and the cutter 10 forming the perforation 16 on the lower side of the packaging film 7 corresponding to the groove 47 is fixed on the receiving rod 48. A receiving plate 51 is arranged on both sides of the cutter 10 on the rod 48 so as to elastically move up and down via a guide rod 49 and a spring 50. In that case, the cutter 10 has fine cutter teeth 10 on both end sides.
A, and has a rough cutter tooth 10B on the center side.
In addition, the guide rods 49 hung on both sides of the receiving plate 51 are springs.
An outer cover 50 is inserted through the receiving rod 48, and a retaining portion 52 is formed at the lower end thereof. A pair of guide rods 53 are hung on the receiving rod 48,
The guide rod 53 is movably supported by a bearing 55 on the frame 54 side fixedly provided on the main body frame 1, and the drive shaft of the motor 57 provided on the mounting plate 56 and the lower surface of the receiving rod 48. Are connected by a crank 58, and the receiving rod 48 is guided by the guide rod 53 via the crank 58 by the drive of the motor 57 to move up and down. Therefore, when the packaging film 7 is stopped, that is, when the packaging film 7 is stopped with the dimension of the film 7 sufficient to package the article 3, the receiving plates 51 provided on both sides of the cutter 10 are packaged by the raising of the receiving rod 48. The film for packaging 7 is elastically held on the side of the cutter holder 46, and at the same time, the cutter 10 cuts into the film for packaging 7 to make a perforation.
Forming 16. As shown in FIG. 4 (B), the perforations 16 have fine cutter teeth 10A on both ends of the packaging film 7.
A fine perforation 16A is formed by cutting, and a coarse perforation 16B is formed on the center side by the coarse cutter tooth 10B. Further, a screw rod 60 pivotally supported on a bearing 59 fixed to the main body frame 1 is screwed onto the mounting plate 56 of the motor 57, and the height of the mounting plate 56 can be adjusted by the rotation of the screw rod 60. A cut amount adjusting handle 61 is rotatably supported by a bearing 62 at the front portion of the main body frame 1, and the adjusting handle 61 and the screw rod 60 are connected via transmission gears 63 and 64. The rotation of the adjusting handle 61 causes the transmission gears 63 and 64 to mesh with each other to rotate the screw rod 60,
The mounting plate 56 moves up and down. By this movement of the mounting plate 56, the height of the motor 57 and the upper limit position of the cutter 10 are changed, and the perforation 16
The cutting depth of changes.

In the cradle lifting device B shown in FIG.
The pedestal 5 is arranged below the packaging part 2 of the pallet 2, and the guide rod 65 hung on the pedestal 5 is movably supported by the bearing 66 fixed to the main body frame 1 side. The pedestal 5 is connected via a crank 68. The pedestal 5 is moved up and down while being guided by the guide rod 65 via the crank 68 by driving the motor 67. When the pedestal 5 is pushed up by the drive of the motor 67 with the object 3 to be packaged being supplied and placed on the cradle 5, the wrapping film 7 supplied to the wrapping section 2 is clearly shown in FIG. 9 (B). The widthwise center side is pushed up like this and becomes tense. The pedestal 5 is formed by a plurality of substantially inverted L-shaped mounting members 69 arranged on the left and right, and each mounting member 69 is pivotally supported on the receiving body 70 so as to be rotatable toward the center side. The urging force of 71 always keeps it in a vertical state to form a mounting portion for the article to be packaged 3. In this case, a plurality of mounting members 69 integrally formed on the same shaft are pivotally mounted on the receiving body 70 by the pivot shaft 72, and the stopper 73 is biased by the spring 71 and stopped in the vertical state.
It is provided on the 70 side.

In the film folding device E shown in FIGS. 2 and 5, a fixing plate installed on the body frame 1 on the rear side of the packaging portion 2 position.
The base ends of the left and right folding tools 75 forming a part of the pair of left and right folding bodies 13 are supported on the lower surface side of the 74 by a pivot 76 so as to be rotatable in the horizontal direction. Rails 77 are provided in the front-rear direction, and moving bodies 78 are provided on the rails 77, respectively.
A rear folding tool 79 that constitutes a part of each of the left and right ends of the folding tool 75 is fixed, and the left and right folding tools 75 are formed with a guide groove 80 in which the base side is curved inward in the lengthwise direction. The guide roller 81 provided on the folding tool 79 engages with the rear folding tool.
Along with the operation of 79, the rearward-folding tool 79 and the left-right folding tool 75 are synchronized with each other to move forward and backward, thereby causing a so-called three-way folding action in which the rear and both sides are interlocked with respect to the article to be packaged 3 on the cradle 5. Is formed to do. Further, a torque motor 82 is provided below the main body frame 1, and the moving body 78 is connected to the drive shaft of the torque motor 82 via a crank 83. Stand 5
The rear folding tool which constitutes a part of the rear folding body 12 through the crank 83 by the driving of the torque motor 82 in a state where the is pressed against the packaging film 7 supplied to the position of the packaging portion 2.
79 is guided by the moving body 78 and the rail 77 to move forward. Along with the movement of the rear folding tool 79, the packaging film 7 is separated from the perforations 16 and guided by the guide groove 80 and the guide roller 81, and the left and right folding tools 75 are rotated around the pivot 76 toward the center and pushed up. The package 3 is moved along the bottom surface of the packaged object 3 and the edges of the packaging film 7 are folded in from three directions to form the package 3a. In this case, the plurality of mounting members 69 forming the pedestal 5 are pressed by the left and right folding tools 75 and rotate toward the center side, so that the folding tools 75 and 76 are allowed to move. Further, the folding tool 79 of the rear folding body 12 is formed with a pair of long grooves 84 in an octagonal shape, and a sliding piece 85 shorter than the long groove 84 is inserted into each long groove 84, and the sliding piece 85 has this sliding piece 85. A screw 87 with a handle 86 for fixing the moving piece 85 to the rear folding tool 79 is screwed on, and the guide roller 81 is pivotally supported on the lower surface of the sliding piece 85 on the end side. Therefore the handle
By loosening 86 and moving the sliding piece 85 along the long groove 84, the width interval of the pair of guide rollers 81 can be changed and the left and right folding tools 75
The folding width can be adjusted. An engaging portion 88 is formed so as to project from the tip of the left and right folding tool 75.

In the film fixing device G shown in FIG. 3 and FIG. 7, when the left and right folding body 13 is in a standby state, a portion which engages with an engaging portion 88 formed at the tip of the left and right folding tool 75 is engaged with the body frame 1 side. L for pushing up the film feeding traveling portions 35a, 36a of the pair of upper and lower endless conveyor belts 35, 36 from below
A character-shaped arm 89 is rotatably provided by a pivot 90, and one end side of the L-shaped arm 89 is provided with the film feeding traveling portions 35a and 36a.
Is provided with a pressing roller 91 for suppressing the pulling out of the packaging film 7 and engaging the engaging portion 88 at the other end side to rotate the L-shaped arm 89 in the direction of pushing up the pressing roller 91. A combining roller 92 is provided. In this case, even if the running portions 35a and 36a are pushed up by the pressing roller 91, the packaging film 7 can be smoothly transferred by the pair of upper and lower endless conveyor belts 35 and 36.

On the front end side of the film feeding traveling portions 35a, 36a, the film is placed slightly above the packaging film 7 and is received by the main body frame 1.
93 is installed, and a fixing plate 94 to which a rubber or the like for fixing the leading end side of the packaging film 7 is fixed is arranged below the packaging film 7 corresponding to the receiving rod 93. Is fixed to a pivot 95 rotatably mounted on the main body frame 1, one end of a link 96 is fixed to the pivot 95, and the other end of the link 96 is a link 98 provided on the drive shaft of the torque motor 97.
Is engaged with the engagement groove 99 and the engagement roller 100.
Therefore, when the link 98 is rotated by the driving of the torque motor 97, the link 96 is rotated via the engagement roller 100 and the engagement groove 99 to rotate the pivot 95, and thereby the fixing plate 94 fixed to the pivot 95. Rotates to catch the leading end of the packaging film 7 93
Fixed in place.

The upper and lower sides of the endless conveyor belts 35 and 36, which press the film feed running portions 35a and 36a from above and below to prevent the packaging film 7 from being pulled out from the perforations 16 near the rear side. A pair of pressing rollers 101 are arranged, the pressing rollers 101 are provided on a moving body 102, and the moving body 102 is provided on rails 10 provided on both side surfaces of the main body frame 1 in the front-rear direction.
A rack rod 104 is provided slidably on the rail 103, parallel to the rail 103 and below the rail 103 so as to be slidable in the front-rear direction, and the movable body 102 is fixed to the rack rod 104. The pinion 108 meshed with the drive gear 107 of the motor 106 meshes with the rack tooth 105 of the rack rod 104, and the drive rod 107 slides through the drive gear 107, the pinion 108, and the rack tooth 105 by the drive of the motor 106. Move the moving body 102 to rail 1
Move along 03. In that case, the motor 106 is installed such that the pressing roller 101 can be moved and set so that the motor 106 is always located in the vicinity of the rear side of the perforation 16 in conjunction with the motor 39 with a clutch and brake that determines the film feeding length of the film feeding device C. ing. In the carry-out device F, the carry-out belt 14 is arranged at the rising standby position of the object 3 to be packed placed on the receiving table 5, and the pack 3a in which the three sides of the film 7 are folded by the folding bodies 12 and 13 is the carry-out belt 14. By heat sealer 10
The film 7 is transferred onto a transfer body 15 containing the film 9, the front end of the film 7 is folded under the tray 18 at the time of transfer, then sealed by the transfer body 15, and then sent out by a delivery belt 110. The carry-out belt 14 is a conveyor belt, and is stretched around a pair of front and rear rollers 112 that are rotatably supported by a frame 111, and the frame 111 is parallelly lifted by a four-bar parallel link mechanism 113 to a receiver 114. The moving shaft of the motor 115 provided on the receiving body 114 and the shaft of the rear roller 112 are connected by a belt 116 and a pulley 117, and the receiving body 114 rotates on a fixed frame 118 installed on the main body frame 1. Screw it to the freely provided screw 119, and
The receiving body 114 is raised or lowered by the rotation operation of the handle 120 provided at the upper part, and is formed so as to be matched with the size and amount of the article to be packaged 3. 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 corresponding to the front end portion of the carry-out belt 14 and at which the packaging body 3a can be placed, and a heat sealer is provided on the carry-out belt conveyor 122 side. 109
Is built in. The carry-out roller 121 and the feed roller 126 of the carry-out belt conveyor 122 are connected via the drive shaft of the motor 123, the gear 124 and the belt 125, and the feed roller 126 of the delivery belt 110 and the drive shaft of the motor 127 are connected to the gear 128. Belt 1
It is connected by 29.

Next, the packaging sequence will be described according to the flowchart of FIG. 10. When the tray 18 on which the product 17 is placed is manually or automatically supplied onto the fixed plate 19, the switch 25 is turned on, whereby the conveyor 4 is operated and the conveyor is activated. The projecting plate 20 fixed to the endless chain 4a of 4 pushes the tray 18, and slides the tray 18 on the fixed plate 19 to transfer it to the position of the packaging unit 2. Simultaneously with the operation of the conveyor 4, the film feeding rubber rollers 29, 30 and the conveyor 4 are operated at a preset feed amount by the adjustment of the pulse generator, and the packaging film 7 pulled out from the roll body 8 is fed by one step. Here, the motor 57 is actuated to move the receiving rod 48 up and down through the crank 58, and the pair of front and rear receiving plates 51 causes the rubber rollers 29, 30 for feeding the film and the conveyor 4 to move.
Drive roller and the film feed rubber roller 31, 32 is stretched between the packaging film 7 elastically sandwiched between the fine cutter teeth 10A on both ends and the coarse cutter tooth 10 on the center side.
A cutter 10 having B cuts and has fine perforations 16A on both end sides and a coarse perforation 16B on the center side.
16 are formed. Then, the pair of rubber rollers 29, 30 and the conveyor 9 are operated to transfer the series of packaging film 7 on which the perforations 16 are formed by one step further to supply the packaging film 7 to the packaging unit 2. In this case, the packaging film 7 is sandwiched between the pair of rubber rollers 29, 30 and the rubber rollers 31, 32, and both side edges of the packaging film 7 are sandwiched between the film feed running portions 35a, 36a of the pair of upper and lower endless conveyor belts 35, 36. A plurality of upper and lower rollers 38, a pair of upper and lower pressing rollers 91, and a pair of left and right folds in a standby state, which are fed to the position of the wrapping section 2 in a state of being inserted and guide the both side ends of the film feeding traveling sections 35a and 36a in a meandering manner. It is pressed by the engagement roller 92 that presses the running portions 35a and 36a by the engagement with the engagement portion 88 of the body 13. Further, in the positional relationship in which the supply of the series of packaging films 7 on which the perforations 16 are formed is completed, a pair of upper and lower pressing rollers 10 are provided.
The rail 1 is installed on the rail 103 so that it can be guided and moved, and is set to be moved to a location near the rear side of the perforations 16. Then product
The tray 18 on which the 17 is placed is transferred from the end of the conveyor 4 and placed on the cradle 5.

At the same time when the object to be packaged 3 is placed on the pedestal 5, the fixing plate 94 rotates about the pivot 95 to fix the leading end side of the packaging film 7 to the receiving rod 93. At the same time, the lift 6 operates so that the pedestal 5 is guided by the guide rod 65 and ascends to push up the packaging film 7 supplied to the packaging unit 2 from the lower surface side to the center side in the width direction of the packaging film 7 to lift the packaging film 7. Then, the rear folding body 12 is guided by the rail 77 and moves forward to separate the wrapping film 7 from the perforations 16 in the order from the fine perforations 16A on both ends to the coarse perforations 16B on the center side. Left and right folding body in conjunction with rear folding body 12
13 is a spring for the mounting member 69 that forms the mounting portion of the pedestal 5.
The packaging film 7 is rotated toward the center side while being tilted toward the center side against 71, and the packaging film 7 is folded into the bottom of the tray 18 from three directions, 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 perforations of the film 7 to be fed in the next operation, so that the cutting from the perforations 16 is good and the left and right folding bodies 75 rotate to engage with the engaging portion 88. The engagement with the combining roller 92 is released, and the pressing roller 91 is in the released state, so that the folding is performed well. After that, the receiving table 5 descends, and the fixing plate 94 that fixes the leading end side of the packaging film 7 also returns to release the fixing. At the same time, the carry-out belt 14 and the carry-out roller 121, the carry-out belt conveyor 122, and the send-out belt 110 are operated so that the carry-out belt 14 is on the upper surface side of the package 3a and the carry-out belt 121 is on the lower surface side.
Transports the package 3a onto the carry-out belt conveyor 122. As a result, the packaging film 7 on the front side of the tray 18 is also folded into the lower surface side of the tray 18, sealed by the heat of the heat sealer 109 on the carry-out belt conveyor 122, and discharged by the delivery belt 110. After that, the folding bodies 75 and 79 are restored.

Thus, in the above embodiment, as shown in FIG. 4 (A), the cutter teeth of the cutter 10 are provided with fine cutter teeth 10A on both end sides and coarse cutter teeth 10B on the center side, and the width direction of the packaging film 7 is The tooth widths of the cutter teeth 10A and 10B are set so that the depth of cut on both ends of the is larger than the depth of cut on the center side, and the cutter 10 causes the packaging film 7 to have a width as shown in FIG. 4 (B). Fine perforations on both ends 16A
A perforation 16 having a rough perforation 16B on the center side is cut and formed, whereby the cut amount of the perforation 16 is configured so that both ends thereof are larger than the center side.

For this reason, when a tensile force is applied to the packaging film 7 during the folding operation of the film folding device E, the packaging film 7 is satisfactorily cut from the fine perforations 16A on both end sides of the film having a large cutting amount, and the perforations 16 are cut. It is separated and cut along.

Therefore, when a film that easily tears is used, even if a branch cut line is formed in the perforation 16, this becomes difficult to spread, and even if it spreads, the perforation on both ends is narrow, so it shifts greatly in the lateral direction. This can be suppressed in advance, which allows easy cutting along the next perforation 16. Further, by forming the perforations 16 continuously in the width direction of the packaging film 7 and increasing the cut amount at both ends in the width direction, the film 7 can be applied to the object to be packaged 3 in a good tension state. Folding operation of the left and right and rear folding bodies 12, 13 of the film folding device E can be folded and packaged, and even if the object to be packaged 3 is pressed against the central side of the packaging film 7 to tension the film 7. As a result, the film 7 is naturally cut from both end sides of the perforation 16 having a large cutting depth first, so that the occurrence of branch cutting lines on the center side of the film 7 is suppressed and the perforation 16 as a whole is made good. It can be cut.

FIG. 11 shows another embodiment of the present invention. In this example, as shown in FIG. 11 (A), the cutter 201 is formed by three cutter plates 201A, 201B, 201C having the same cutter teeth 200. The cutter plates 201A, 201B, 201C are arranged side by side in the width direction of the packaging film 202, and the cutter plates 201A, 201C on both sides of the central cutter plate 201B are arranged.
The height of the cutter tooth 200 is made higher on both sides than the center, so that the cutting amount on both ends in the width direction of the packaging film 7 is larger than the cutting amount on the center side. 200 tooth positions are set. When the perforations 203 are formed on the packaging film 202 with such a cutter 201, the perforations 203A with long slits are formed on both end sides of the perforations 203, and the perforations 203B with short slits are formed on the center side. As a result, the depth of cut of the perforation 203 becomes larger on both end sides than on the center side.

Therefore, when a tensile force is applied to the packaging film 202 during the folding operation of the left and right and the rear folding bodies 12 and 13 of the film folding device E as in the above-described embodiment, the packaging film 202 will have a large cut amount at both ends of the film. It is cut well from the perforation 203A due to the long slits and is separated and cut along the perforation 203. Therefore, when a tearable film is used, it is difficult for the cutter 201 to spread even when a branch-shaped cutting line is formed at the time of forming the perforation 203 by the cutter 201 or when tension is applied to the perforation 203. In addition, since the perforations on both ends are narrow, it is possible to prevent a large lateral shift, and thus easily cut along the next perforation 203.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the device for cutting the packaging film from the perforations when the film is folded has been described as an example.
The packaging film may be cut before the film is folded, as is known from Japanese Patent No. 15192.

[Advantage of the Invention] The present invention is provided so as to be able to move up and down so as to make a cut in the packaging film, and the cut amount on both ends in the width direction of the packaging film is larger than the cut amount on the center side. A film cutting device having a cutter for setting a tooth width and a tooth-over position of a cutter tooth to form continuous perforations in the width direction, a film supply device for transferring a packaging film to a packaging portion position, A package supplying device for transferring a package onto a receiving table, a receiving table elevating device for vertically moving a receiving table on which a package is placed, and a package in which a perforation is formed by an elevating operation of the film cutting device. A film fixing device that clamps at least the leading end side of the packaging film in the transfer direction after feeding the film for packaging to the position of the packaging portion by the film feeding device, and the cradle lifting device with the leading end sandwiched. The pedestal on which the object to be packaged is placed is raised to the position of the wrapping portion, and the object to be packaged pushes up the widthwise center of the packaging film to make it tense, and the tense film is cut from the perforations to be covered. It is provided with a film folding device having left and right folding parts and a rear folding body that is folded under the package, and a package carrying-out device that carries out the packaged product folded by the film folding device. It is possible to provide a packaging device in which a good tension can be obtained and which can satisfactorily be cut from perforations even when a film that easily tears is used.

[Brief description of drawings]

FIG. 1 is an overall longitudinal sectional view, FIG. 2 is an overall plan view, FIG. 3 is a front view showing a package supply device and a cradle lifting device, and FIG. 4 (A) is a front view of a film cutting device. FIG. 4 (B) is a plan view showing a state in which the film is perforated, FIG. 5 is an exploded perspective view of the film folding device, FIGS. 6 and 7 are front views of the pressing roller mechanism, and FIG. Figures (A) to (H) and Figures 9 (A) to (C) are operation state diagrams showing the packaging state, Figure 10 is a flow chart, and Figures 11 (A) and (B) are other embodiments. FIG. 11 (A) is a partially cutaway front view of the cutter, FIG.
FIG. 3B is a plan view showing a state in which the film has perforations. 2 ... Packing unit 3 ... Packaged object 3a ... Packaging body 5 ... Receptor 7,202 ... Packaging film 10,201 ... Cutter 10A, 10B, 200 ... Cutter teeth 12 ... Left and right folding body 13 ... Rear fold body 16,203 ...... Perforation A …… Package feed device B …… Cradle lift device C …… Film feed device D …… Film cutting device E …… Film folding device F …… Unloading device G: Film fixing device

Claims (1)

[Scope of utility model registration request] 1. A cutter tooth which is provided so as to be able to move up and down to make a cut in the packaging film and has a cutting depth on both sides in the width direction of the packaging film which is larger than a cutting depth on the center side. A film cutting device that has a cutter that sets the tooth width and the toothbrush position to make continuous perforations in the width direction, a film feeding device that transfers the packaging film to the packaging section position, and a packaged object The package supply device for transferring to the table, the cradle lifting device for vertically moving the cradle for mounting the package, and the packaging film having perforations formed by the lifting operation of the film cutting device described above. A film fixing device that clamps at least the leading end side of the packaging film in the transfer direction after it has been fed to the wrapping portion position by the film feeding device, and the pedestal raising and lowering device holds the packaged object while the leading end side is clamped. The pedestal placed is raised to the position of the wrapping portion and the widthwise center side of the packaging film is pushed up by the object to be wrapped to be tensioned, and the tensioned film is cut from the perforations to the lower side of the object to be wrapped. A packaging device comprising: a film folding device having left and right folding bodies and a rear folding body; and a package carrying-out device for carrying out a packaged product folded by the film folding device.