JPH052403Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to wrapping objects to be packaged, particularly foodstuffs and other products in trays or other containers, using stretchable plastic films such as polyvinylidene chloride. This article relates to a packaging machine that uses Tsuchifilm for packaging.

[Prior Art] Generally, as a packaging machine, for example, by pushing up an object to be packaged supplied to a pedestal toward a stretch film supplied to a packaging section and stretched,
The article to be packaged is pressed against the stretch film, the film is held in a tensioned state, and the stretch film is folded under the article by the folding member to wrap the article, and then the wrapped article is carried out. something is known. The film folding device uses a folding tool to fold the stretch film into the underside of the packaged object, and includes a rear folding body that can be moved back and forth along the supply direction of the stretch film, and a rear folding body that can be opened and closed in the width direction of the film. Japanese Patent Application Laid-open No. 1983-1983 is equipped with a mechanism for folding the film in the front and rear directions and the width direction using provided left and right folding bodies.
It is disclosed in Publication No. 160230.

The proximal ends of the left and right folding bodies are pivotally supported on a support plate installed between the left and right rails, and the left and right folding bodies are pivotally attached to the support plate so as to be rotatable in the left-right direction. It has a guide groove along its longitudinal direction, and guide pins attached to the left and right sides of the rear folding body are slidably connected to the guide groove, and the rear folding body is connected to the left and right rails. By sliding along the rear folding body, the left and right folding bodies are opened and closed in the left-right direction while overlapping the lower surface of the rear folding body via the guide groove and the guide pin. As a result, when the rear folding body slides toward the packaged item, the stretch film sneaks in from the rear side of the packaged item while being folded in a V-shape between the pedestal and the packaged item.
Next, in conjunction with the forward folding operation of the rear folding body, the leading ends of the left and right folding bodies, which are still unfolded in a figure-of-eight shape, are narrowed inward to move the stretch film from the left and right sides of the packaged object to the holder and to the packaged object. It sneaks into objects by folding in a V-shape. In this case, the film folding operation by the left and right folding bodies is performed by moving the left and right folding bodies through the stretch film, which is held under tension by the packaged articles placed on the pedestal as the pedestal rises. Since the lower side of the film is folded in, the film stretching force acts as a load on the left and right folding bodies, so metal plates are used for the left and right folding bodies to withstand such loads. In order to prevent the film from being damaged, the upper surfaces of the left and right folding bodies that come into direct contact with the film are formed to be glossy and smooth.

[Problems to be solved by the invention] By the way, in the film folding operation using the left and right folding bodies, since the film is folded in a tensioned state, as the folding progresses, the tension of the film acts on the left and right folding bodies, especially at the folding edges. It has a strong effect on the body. In addition, the left and right folding bodies are pivoted on the support plate by pivoting, and the leading ends of the left and right folding bodies are rotated inward to insert the film between the pedestal and the packaged object. Because of folding, the left and right folding bodies are inserted deeper into the space between the holder and the object to be packaged as they move toward the tip, and not only does the stretching force of the film in front of the fold of the object to be packaged become stronger, but also the folding speed increases. is also faster on the distal side than on the proximal side. As described above, in film folding using the left and right folding bodies, the stretching force and folding speed of the film differ depending on the folding position of the left and right folding bodies relative to the packaged object, but in the above conventional example, the left and right folding bodies Since the surface is made of a smooth metal plate, the film tends to stick to the left and right folding bodies due to the tension of the film during the film folding operation, and if the left and right folding bodies are narrowed and closed with the film attached. However, there are problems such as wrinkles occurring between the attachment points of the left and right folding bodies, and the film being torn due to excessive tension.

Such a problem becomes more noticeable as the width of the packaged object becomes larger, as the narrowing stroke of the left and right folding bodies becomes longer and the unreasonable tensile force applied to the film becomes stronger.

SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging machine that can prevent film from adhering to the upper surfaces of left and right folding bodies during film folding operations.

[Means for Solving the Problems] The present invention includes a film supply device that supplies stretch film to a packaging section position, a pedestal lifting device in which a pedestal is provided to be movable up and down below the packaging section position,
A packaged article supplying device that supplies the packaged articles onto the pedestal, a rear foldable body that is movable back and forth along the supply direction of the stretch film, and a rear foldable body that is arranged so that the width of the film is overlapped with the lower surface of the rear foldable body. The left and right folding bodies are provided with proximal ends pivoted to the main body frame and distal ends rotatable inwardly, and the distal ends of the left and right folding bodies are connected to the receiver. While folding the film that is under tension due to the lifting of the table, insert the film between the holder and the object to be packaged, fold the film to the left and right sides of the object to be packaged, and then use the rear folding body to fold the film into the rear side of the object to be packaged. The packaging machine is equipped with a film folding device for folding the left and right folding bodies, and a fluororesin coating layer is provided on at least the upper front side of the left and right folding bodies to prevent film from adhering.

[Function] In this invention, the coefficient of friction between the left and right folding bodies is reduced by the fluororesin coating layer, making it difficult for the film to adhere to the left and right folding bodies during the left and right folding operation of the film, and the friction coefficient of the left and right folding bodies being reduced during the folding operation. Folds smoothly without sticking to the top surface.

[Example] FIGS. 5 and 6 show an overview of the overall configuration of the packaging machine.
A packaged article supplying device A is provided with a conveyor 4 for transporting the packaged articles 3 to the lower part of the packaging section 2, which is approximately the middle portion of the packaging section 2.

At the supply side end of the conveyor 4, a pedestal 5 is disposed on which the objects 3 to be packaged are fed and placed by the conveyor 4, and this pedestal 5 is connected to a lift 6 which is moved up and down by a drive section as appropriate. , and forms a pedestal lifting device B that stretches and holds the stretch film 7 when the pedestal 5 is raised.

A roll body 8 in which a stretch film 7 is wound in a roll shape is rotatably held on the rear side of the main body frame 1. The film 7 is sandwiched between a pair of upper and lower endless belts 9, and the film 7 is transferred to the packaging section 2.
A film feeding device C for transporting the film to the main body frame 1 is disposed 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 side where the stretch film 7 is inserted, there is a film cut consisting of a cutter 10 for perforating the stretch film 7 in the width direction, and a film presser 11 provided on both sides of the cutter 10. A device D is provided.

On the packaging section 2 side of the main body frame 1, there are a rear folding body 12 and a left and right folding body 13 that reciprocate back and forth along the bottom surface of the packaged object 3 pushed up by the pedestal lifting device B to separate it from the perforation. A film folding device E is provided.

A carry-out device F is provided on the upper side of the main body frame 1 and 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.

Next, to explain the packaging order with reference to FIG. 11, the packaged items 3 such as trays containing products are transported from the front side of the main body frame 1 to the lower part of the packaging section 2 at approximately the middle portion by the conveyor 4 of the packaged item supplying device A. It is supplied and placed on the pedestal 5 that has been transported to the point where it is placed. At the same time as this object to be packaged 3 is transferred, the roll body 8 is
The stretch film 7 that has been pulled out is transferred from the rear side of the main body frame 1 toward the packaging section 2 while being sandwiched between a pair of upper and lower endless belts 9, and the cutter 1 of the film cutting device D is transferred during the transfer.
0 to form perforations 16, and the series of stretch films 7 with the perforations 16 thus formed are further transported to the packaging section 2.

In this manner, the object to be packaged 3 is supplied onto the pedestal 5, and a series of stretch films 7 with perforations 16 are supplied to the packaging section 2, when the lift 6 of the pedestal lifting device B is loaded. Therefore, the pedestal 5 rises and the stretch film 7 supplied to the packaging section 2
Push up from below and extend it, then press the rear folding body 1
2 and the left and right folding body 13 are slid along the bottom surface of the pushed-up object 3 to be separated from the perforation 16, and the edges of the stretch film 7 are folded in to form a package 3A. The package 3A is carried out to the front side of the main body frame 1 by the carry-out belt 14 and the transport body 15.

More specifically, in the packaging material supply device A, a tray 18 on which foodstuffs and other products 17 are placed
The object to be packaged 3 is transferred from the front side of the main body frame 1 toward the middle side of the main body frame 1, and while the tray 18 is placed on the fixed plate 19, it is transported by the L-shaped projecting plate 20. It is transferred and pushed out onto the pedestal 5. The projecting plate 20 is attached to a pair of endless chains 4a of a conveyor 4 connected by a chain 22 to a motor 21 with a brake that moves at a preset speed so as to supply the objects 3 to be packaged. The projecting plate 20 is fixedly attached and moves along a guide groove 24 formed in the fixed plate 19. A tray 18 is attached to the fixed plate 19.
The switch 25 and the tray 18 that detect the supply of
Switch 2 for transferring onto the pedestal 5 in steps
When the tray 18 is not supplied, the tray 18 is stopped, and when the tray 18 is supplied, it is transferred to the pedestal 5 in two steps.

In the film supply device C, the main body frame 1
The stretch film 7 pulled out from a roll body 8 rotatably held on the rear side of the main body frame 1 is guided to the upper side of the main body frame 1 by two guide rollers 27 and 28, and is rotatably installed on the main body frame 1. A pair of upper and lower film feeding rubber rollers 2
Guided between 9 and 30. On the front side of the film feeding rubber rollers 29, 30, a pair of upper and lower conveyor 4 driving and film feeding rubber rollers 31, 32 are spaced apart and mounted 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 and 34 for the conveyor 4 are rotatably supported on both front side surfaces of the main body frame 1. the rubber roller 31,
32 and the rollers 33, 3
A pair of upper and lower endless belt conveyors 35 and 36 are spanned between the four. A plurality of shafts 37 that press the upper belt conveyor 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 portions 35a, 36a of the pair of upper and lower endless belt conveyors 35, 36 are supported. A roller 38 is pivotally supported on the side surface of the multi-body frame 1. A motor 39 with a clutch brake is provided at the bottom of the main body frame 1, and is used 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. Drive gear 40 and the film feeding rubber rollers 29, 3
gears 41 and 42 provided coaxially with the conveyor 4 and rubber rollers 31 and 3 for driving the conveyor 4 and feeding the film;
Gears 43 and 44 provided coaxially with 2 are connected by a timing belt 45, and the timing belt 45 connects 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. are distributed sequentially. Therefore, the motor 39 rotates intermittently at the film feed length pitch set in advance by adjusting the pulse generator. Drive the film feeding rubber rollers 29, 30 and the conveyor 4, and drive the film feeding rubber roller 3.
1 and 32 rotate, and the conveyor 4 is driven. For this reason, the series of stretch films 7 pulled out from the roll body 8 remain in a continuous state until the guide rollers 27,
28, a pair of upper and lower rubber rollers 29, 3
0 and between the rubber rollers 31 and 32, and the both ends of the stretch 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, and are intermittently fed. transport.

In the pedestal lifting device B, a pedestal 5 is arranged below the packaging section 2 of the main body frame 1, and the pedestal 5
A guide rod 46 hanging vertically is supported by a bearing 47 fixed to the main body frame 1 so as to be able to move up and down, and the drive shaft of a motor 48 and the pedestal 5 are connected via a crank 49. Driven by the motor 48, the cradle 5 moves up and down while being guided by the guide rod 46 via the crank 49. 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 48, the stretch film 7 supplied to the packaging section 2 is tensed and expanded. The pedestal 5 is formed by a plurality of approximately L-shaped mounting members 50 arranged on the left and right, each of the mounting members 50 being pivotally supported on a holder 51 so as to be rotatable toward the center. Each of them is biased by a spring (not shown) so that they are always kept in a vertical state to form a placement section for the object to be packaged 3.

In the film folding device E, the base ends of a pair of left and right folding bodies 13 each having an aperture lever 13A at the tip on the lower surface side of a fixed plate 52 installed on the main body frame 1 on the rear side of the packaging section 2 are horizontally rotated by a pivot 53. Rails 54 are provided in the front-rear direction on both sides of the main body frame 1 of the packaging section 2, and a moving body 55 is provided on each of the rails 54, and the rear folding body 12 is movably supported. A guide groove 56 is formed in the left and right folding body 13 with the base side curved inward in the length direction, and a guide roller 57 provided on the rear folding body 12 is attached to the left and right folding body 13 at both ends thereof. As the rear folding body 12 enters and the rear folding body 12 operates, the rear folding body 12 and the left and right folding bodies 13 advance and close in synchronization with each other, so that the cover on the pedestal 5 is moved as shown in FIGS. 12A, B, and C. It is formed to perform a so-called three-way folding action on the package 3 in which the rear and both sides are interlocked with each other.

That is, while the rear folding body 12 moves forward toward the object to be packaged 3, the stretch film 7 is moved toward the object to be packaged while the tip of the stretch film 7 is retained between a receiving rod 61 and a fixing plate 62, which will be described later. 3 from the rear side between the pedestal 5 and the object to be packaged 3 while folding in a V-shape. Furthermore, in conjunction with the forward folding operation of the rear folding body 12, the left and right folding bodies 13, which are still unfolded in a figure-eight shape, narrowly close inward to receive the stretch film 7 from the left and right sides of the packaged object 3. 5 and the object to be packaged 3 while being folded in a V-shape. Similar to the folding finger section, the front end is clamped and fixed between the holder 61 and the fixing plate 62, and the stretch film 7 has the function of squeezing inward while hooking both ends of the front edge of the stretch film 7, which is held stretched. will be done.

More specifically, a torque motor 58 is provided below the main body frame 1, and a drive shaft of the torque motor 58 is connected to the moving body 55 via a crank 60.
are connected to each other, and a pedestal 5 on which the object to be packaged 3 is placed
While being pressed against the stretch film 7 supplied to the packaging section 2, the rear folding body 12 is guided by the movable body 55 and the rail 54 and moved forward by the drive of the torque motor 58 via the crank 60. As the rear folding body 12 moves, the stretch film 7 is separated from the perforation 16, and the left and right folding bodies 13 are rotated toward the center around the pivot 53 and pushed up while being guided by the guide grooves 56 and guide rollers 57. The stretch film 7 is slid along the bottom surface of the wrapped object 3, and the edges of the stretch film 7 are folded in from three sides to form a package 3A. In this case, the plurality of placing parts 50 forming the pedestal 5 are pressed by the left and right folding bodies 13 and rotate toward the center, so the folding bodies 1
This allows movement of 2 and 13.

A support rod 61 is installed on the main body frame 1 at a position slightly above the stretch film 7 on the front end side of the film feeding traveling portions 35a and 36a, and a lower position of the stretch film 7 corresponding to the support rod 61 is provided. A fixing plate 62 to which rubber or the like is attached is arranged to clamp and fix the tip end side of the stretch film 7, and the fixing plate 62 is fixed to a pivot shaft 63 rotatably installed on the main body frame 1. One end of a link 64 is fixed to the drive shaft, and the other end of the link 64 is connected to a link 66 provided on the drive shaft of a torque motor 65 via an engagement groove 67 and an engagement roller 68. Therefore, when the link 64 is rotated by the drive of the torque motor 65, the pivot shaft 63 is rotated via the engagement roller 68 and the engagement groove 67, and thereby the fixed plate 62 fixed to the pivot shaft 63 is rotated. The front end of the stretch film 7 is fixed to the holder 61 by clamping it.

In the unloading device F, the unloading belt 14 is disposed at a rising standby position for the packaged object 3 placed on the pedestal 5,
The packaging body 3A folded into the folding bodies 12 and 13 by the unloading belt 14 is transferred to the heat sealer 6.
During this transfer, the front end of the film 7 is folded under the tray 18, and after being sealed by the transfer body 15, it is sent out by a transfer belt 70.

Then, when the tray 18 carrying the products 17 is fed manually or automatically onto the fixed plate 19, the switch 15 is turned on, thereby operating the conveyor 4 and moving the endless chain 4 of the conveyor 4.
The projecting plate 20 fixed to A pushes the tray 18,
The tray 18 is moved toward the lower position of the packaging section 2 while being slid onto the fixed plate 19. Simultaneously with the operation of the conveyor 4, the film feeding rubber rollers 29, 30 and the conveyor 4 are operated at a feeding amount preset by adjusting the pulse generator, and the stretch film 7 pulled out from the roll body 8 is fed one step. Here, the cutter 10 cuts into the stretch film 7 stretched between the rubber rollers 29, 30 for transporting the film and the rubber rollers 31, 32 for driving the conveyor 4 and transporting the film, thereby forming perforations 16. Next, the rubber rollers 29, 30 and the conveyor 4 are operated to remove the perforation 1.
The series of stretch films 7 having the numbers 6 formed thereon are further transferred one step to supply the stretch films 7 to the packaging section 2. In this case, the stretch film 7 is connected to the rubber rollers 29, 30 and the rubber roller 3.
1 and 32, and the both side edges thereof are sandwiched between the film feeding running sections 35a and 36a of a pair of upper and lower endless belt conveyors 35 and 36, and are supplied to the packaging section 2 position. 3
Both ends of 5a and 36a are pressed by a plurality of upper and lower rollers 38 that guide them in a meandering manner.

At the same time that the packaged object 3 is placed on the pedestal 5 in this manner, the fixing plate 62 rotates around the pivot 63 and clamps and fixes the front end of the stretch film 7 between it and the fixing plate 61, and lifts it. 6 operates, the pedestal 5 rises guided by the guide rod 46, pushes up the stretch film 7 supplied to the packaging section 2 from the lower surface side, and stretches the stretch film 7. At the same time, the rear folding body 12 moves up against the rail 54. The stretch film 7 is separated from the perforation 16 by moving forward as guided by the rear folding body 12, and the left and right folding bodies 13 form a mounting portion for the pedestal 5 (not shown). The stretch film 7 is rotated toward the center while being tilted toward the center against the spring, and the stretch film 7 is folded into the bottom of the tray 18 from three sides, so that the package 3A is placed on the rear folding body 13. Thereafter, the pedestal 5 descends and the fixing plate 62 fixing the front end of the stretch film 7 also returns to release the fixation. At the same time, the upper side of the package 3A is transferred by the carry-out belt 14, and the lower side is transferred by the carry-out roller 71, and the package 3A is transferred onto the carry-out belt conveyor 72. As a result, the stretch film 7 on the front side of the tray 18 is also folded into the lower surface side of the tray 18, and the unloading belt conveyor 72
It is sealed by heat from a heat sealer 69 at the top, and is transported out by a delivery belt 70. Thereafter, the folded bodies 12 and 13 return to their original positions.

Further, the film folding device E is provided with a clearance adjustment device G for adjusting the clearance between the rear folding body 12 and the left and right folding bodies 13. This clearance adjustment device G includes a guide roller 57 fitted into a guide groove 56 as shown in FIGS. 7 and 10.
is supported by a support shaft 76 with a square flange 75 inserted from the lower surface side of the left and right folding body 13 via a resin washer 74, and a step 77 at the end of the support shaft 76
A screw 77 with an A is screwed onto the rear folding body 12. Thereby, the guide roller 57 is configured to rotate around the support shaft 76 between the lower surface of the rear folding body 12 and the resin washer 74.
On the other hand, the pivot shaft 53 that supports the base ends of the left and right folding bodies 13 on the lower surface of the fixing plate 52 is inserted into the through hole 78 of the left and right folding bodies 13 from the lower surface side as shown in FIGS. 7 and 8. The cylindrical part 79B of the collar 79 with 79A is inserted, and the corner head 5 is inserted from the upper surface side of the through hole 74 via a resin washer 80.
The pivot 53, which is a screw having a diameter of 3A, is attached to the cylindrical portion 7.
9B, and screw the first nut 81 into the insertion part of the pivot 53 to the flange 79A side,
The insertion end of the pivot 53 is inserted into the screw hole 82 of the fixing plate 52.
and insert the second nut 83 into the threaded end of the pivot 53.
It is constructed by screwing on. When adjusting the clearance, loosen the second nut 83 and engage the corner head 53A with a tool such as a spanner to tighten the pivot shaft 5.
Rotate 3 in one direction. As a result, the pivot 53 is lowered relative to the fixed plate 52, and the base end portions of the left and right folding bodies 13, which are integrated by the pivot 53, the collar 79, the washer 80, and the first nut 81, are rotated around the guide roller 57 as a fulcrum. Move downward as shown in Figure 10. Therefore, the leading ends of the left and right folding bodies 13 move upward using the guide roller 57 as a fulcrum, and the left and right folding bodies 13 tilt upward, so that the clearance between the left and right folding bodies 13 and the front end of the rear folding body 12 can be adjusted to a small value. , then screw the second nut 83. Note that when the pivot 53 is rotated in the other direction, the left and right folding bodies 1
3 is tilted in the opposite direction, allowing for appropriate clearance adjustment. Therefore, as the film folding operation is repeated, the left and right folding bodies 13 gradually become downward due to the stretching force of the film, and the stretch film 7 is sandwiched between the left and right folding bodies 13 and the rear folding body 12. If such a clearance occurs, the clearance can be easily adjusted to a smaller value by operating the second nut 83 and rotating the pivot shaft 53. Therefore, problems such as the film 7 being caught in the clearance area or the bottom of the rectangular tray 18 can be prevented.

In the packaging machine configured as described above, the front side of the upper surface of the left and right folding bodies 13 constituting the film folding device E is coated with a fluororesin coating such as Teflon to prevent film from adhering, as shown in FIGS. 1 to 3. Layer H is formed by an appropriate method such as adhesion, coating with paint, or spraying with paint. By forming the fluororesin coating layer H on the left and right folding bodies 13 in this manner, when the left and right folding operation of the film 7 is performed as shown in FIG.
Even if the packaged item 3 is placed on top and the load of the packaged item 3 presses the film 7 against the upper surface of the left and right folding body 13, the film 7 remains in the fluororesin coating layer H.
Because of this, it does not stick to the left and right folding bodies 13,
The film 7 is folded into a V-shape between the pedestal 5 and the packaged item 3 from the left and right sides of the packaged item 3 by the narrowing and closing operations of the left and right folding bodies 13 .

FIG. 4A shows a case where a fluororesin coating layer H is formed on the entire upper surface of the left and right folding body 13, and FIG. 4B shows a case where a fluororesin coating layer H is formed on the upper and lower surfaces of the folding body 13. As in the above embodiment, the fluorine resin coating layer H prevents the film 7 from adhering to the upper surface of the left and right folding body 13, and the left and right folding operation of the film 7 is performed satisfactorily.

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. For example, the overall structure of the packaging machine can be adapted to various types, such as the one disclosed in Japanese Patent Publication No. 56-35578 which clamps and feeds the film.

[Effects of the invention] The present invention includes a film feeding device that supplies stretch film to a packaging section position, a pedestal lifting device in which a pedestal is provided to be movable up and down below the packaging section position,
A packaged article supplying device that supplies the packaged articles onto the pedestal, a rear foldable body that is movable back and forth along the supply direction of the stretch film, and a rear foldable body that is arranged so that the width of the film is overlapped with the lower surface of the rear foldable body. The left and right folding bodies are provided with proximal ends pivoted to the main body frame and distal ends rotatable inwardly, and the distal ends of the left and right folding bodies are connected to the receiver. While folding the film that is under tension due to the lifting of the table, insert the film between the holder and the object to be packaged, fold the film to the left and right sides of the object to be packaged, and then use the rear folding body to fold the film into the rear side of the object to be packaged. In a packaging machine equipped with a film folding device for folding the left and right folding bodies, a fluororesin coating layer is provided on at least the front side of the upper surface of the left and right folding bodies to prevent film from adhering to the left and right folding bodies. It is possible to provide a packaging machine that eliminates the problem that the film sometimes tears.

[Brief explanation of drawings]

1 to 12 show embodiments of the present invention,
Fig. 1 is a plan view of a left and right folding body having a fluororesin coating layer, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig.
The figure is a schematic explanatory diagram showing the left and right folding operation state, Figures 4A and B show other embodiments, Figure 4A is a plan view, Figure 4B is a sectional view, and Figure 5 is a longitudinal section of the packaging machine. 6 is a plan view of the same, FIG. 7 is a plan view of the clearance adjustment device, FIG. 8 is an enlarged sectional view taken along the line B-B in FIG. 7, and FIG. 9 is a view taken along the line C-C in FIG. 7. Enlarged cross-sectional view,
Figure 10 is a sectional view taken along the line D-D in Figure 7, Figure 11 A, B, C, D, E, F, G, H, and Figure 12 A, B, C are working state diagrams in the packaged state. be. DESCRIPTION OF SYMBOLS 1...Main frame, 2...Packaging section, 3...Packaged object, 3A...Packaging body, 12, 13...Folding body, A...Packaged object supply device, B...Passage lifting device, C... Film feeding device, D... Film cutting device, E... Film folding device, F... Carrying out device, H... Fluorine resin coating layer.

Claims (1)

[Scope of utility model registration request] a film supply device that supplies stretch film to a packaging section position; a pedestal elevating device that has a pedestal movable up and down below the packaging section position; and a packaged object that supplies the packaged item onto the pedestal. It has a material supply device, a rear folding body that can be moved back and forth along the direction in which the stretch film is supplied, and left and right folding bodies that can be opened and closed in the width direction of the film while overlapping the lower surface of the rear folding body, The left and right folding bodies have their proximal ends pivoted to the main body frame, and their distal ends are rotatable inward, and the distal ends of the left and right folding bodies are attached to the cradle while folding the film under tension due to the rise of the pedestal. and a film folding device which is inserted between the packaged article and the left and right sides of the packaged article, and which folds the film onto the rear side of the packaged article with a rear folding body, A packaging machine characterized in that a fluororesin coating layer for preventing film from adhering is provided on at least the front upper surface of the left and right folding bodies.