JPH0454889Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention provides for packaging objects, especially foodstuffs and other products placed in trays or other containers, using a so-called stretchable plastic film such as polypinylidene chloride. This invention relates to a packaging machine that wraps with stretch film.

[Prior Art] As a packaging machine using stretch film, an automatic packaging machine disclosed in Japanese Patent Publication No. 56-35572, for example, has an elevator provided with a receiver movable back and forth on the top surface, and a tray installed in the elevator. An article supply table is provided with a push bar for supplying the goods, and when a tray placed above the article supply table and covered with a film is carried out, a film is placed between the conveyor, the elevator, and the article supply table. It is equipped with a film feeding device that feeds the film, and a carrying out device that carries out the covered trays to the conveyor. The container is configured to be transferred to the conveyor.
However, in this automatic packaging machine, the trays from the article supply table are fed onto the elevator at the lower position, and after this feeding, the elevator rises to the conveyor position and the tray is carried out onto the conveyor by the carrying out device. The elevator descends again to the article supply table position to supply the next tray, and while the elevator is descending, the next tray must wait on the article supply table. The packaging workability was poor. Therefore, as the packaging work is carried out continuously,
By pushing up the packaged item supplied to the pedestal toward the film supplied to the packaging section and stretched, the packaged item is pressed against the film and the film is wrapped with a folding tool while holding the film in a tensioned state. It is wrapped by folding it under the object, then the wrapped package is carried out, and the object to be packaged is continuously fed and wrapped.
There are suggestions for packaging. By the way, in such a packaging machine, an endless delivery belt is disposed above the upper part of the object to be packaged, and by operating this delivery belt and sending it in contact with the top surface of the package, a part of the periphery of the film is removed. A carrying-out device is provided that folds the edges while carrying out the carrying-out device. This unloading device must not apply an excessive load to the package, so when the package is large, it is pushed up by the package, floats up, and applies its own weight as a pressing force.

[Problems to be solved by the invention] In the above-mentioned conventional technology, since the surface of the delivery belt that contacts the top surface of the packaged object is formed flat, it is difficult for the package to contain wetlands in a tray or other container. In cases where the stored items are greatly raised from the mouth of a tray or other container, as in cases where the unloading belt is in contact with the raised portion of the stored items, the pressing force due to the weight of the unloading belt device is applied to the raised portion. This caused a problem in that wetlands and other stored objects were crushed, resulting in a loss of commercial value.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a packaging machine that can efficiently transport a package in which contents are raised from the mouth of a tray or other container without damaging the contents.

[Means for Solving the Problems] The present invention provides a film supply device that supplies stretch film to a packaging section position, and a film supply device that supplies a packaged article containing an article in a tray to the packaging section position. a supply device, a film folding device that folds a stretch film onto the underside of an object supplied to a wrapping position by the object supply device, and a carry-out device that carries out a package in which the film is folded into the object. In the packaging machine, the unloading device includes a frame pivotably supported on the main frame side so as to be vertically rotatable, an unloading body provided on the frame so as to be movable back and forth, and an actuating device for the unloading body. , a lift mechanism for lowering the delivery body to come into contact with the package in response to the final folding operation of the film folding device; This packaging machine is provided with an abutting part that abuts against a peripheral portion of a tray of a packaging body provided around a recessed part.

[Function] In the case of carrying out a package in which contents are raised from the mouth of a tray or other container, even if the carry-out body comes into contact with the package, the raised part of the contents will be removed from the recessed part. The peripheral edge of the tray comes into contact with the abutting part and the package is transported while being held stably, which prevents the raised part of the contents from being crushed by the conveyor. .

[Example] FIGS. 4 and 5 show an outline of the overall structure of a stretch film package. On the front side of the main body frame 1, there is a lower part of the wrapping part 2, which is approximately the middle part of the main body frame 1. A packaged article supply device A is provided which includes a conveyor 4 for transporting the packaged articles 3 up to the point where the packaged articles 3 are transported.

At the supply end of the conveyor 4, there is provided a pedestal 5 on which the articles 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 unit as appropriate. In addition, a pedestal lifting device B is formed which 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. A film feeding device C, which is inserted into the endless belt 9 and transported to the packaging section 2 position, is arranged on both sides of the upper part of the main body frame 1 in the front-rear direction. A film cutting device D consisting of a cutter 10 for making perforations in the width direction of the film 7 at the end of the endless belt 9 on the insertion side of the stretch film 7, and a film presser 11 provided on both sides of the cutter 10. is provided.

A rear folding body 12 that reciprocates along the length direction of the film 7 and left and right folding bodies 13 that can be opened and closed with each other along the width direction of the film 7 are provided on the packaging section 2 side of the main film 1. As the bodies 12 and 13 move, the film 7 is cut from the perforation position, and a film folding device E, which is a film wrapping device, is provided on the bottom surface of the packaged object 3 that is pushed up by the pedestal lifting device B. ing.

An unloading device F is provided on the upper side of the main body frame 1, and includes an unloading body 14 that moves 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 packaged items 3 such as trays containing products are shown in Figure 6A,
As shown in FIG. 1B, 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 pedestal 5. At the same time as the object to be packaged 3 is transferred, the stretch film 7 is pulled out from the roll body 8 by the film supply device C and is sandwiched between a pair of upper and lower endless belts 9 from the rear side of the main body frame 1 toward the packaging section 2 position. The series of packaging films 7 with perforations 16 formed thereon are further transported as shown in FIGS. 6A and 6B. It is then transferred to the packaging section 2 position.

In this way, as shown in FIG. 6B, the article 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. As shown in Figure C, the cradle 5 is raised by the lift 6 of the pedestal lifting device B, and the packaging section 2
The film 7 supplied to the position 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 packaged and are separated from the perforation 16, and The edges of the film 7 are folded to form a package 3A, and this package 3A is carried out by a carry-out body 14 and a transport body 15 as shown in FIG. 6D.

Further, in the unloading device F, the unloading body 14 is disposed at a rising standby position for the packaged object 3 placed on the pedestal 5, and the package 3A with the film 7 folded on three sides by the folding bodies 12 and 13 is transported into the unloading unit. 14 onto a transfer body 15 containing a heat sealer 17, and during this transfer, the front edge of the film 7 is folded under the tray 18, and then this transfer body 15
After being sealed, it is sent out by the delivery belt 19. In this case, as shown in FIGS. 7 to 9, a frame 22 formed by connecting a pair of left and right rails 20 in the longitudinal direction of the film by a horizontal rod 21 is vertically moved toward the main frame 1 by a pivot 23. A base plate 24 is rotatably supported on the left and right rails 20 and has a soft pressure member 24A, such as a sponge, constituting the delivery body 11 fixed thereon, so as to be movable back and forth. A motor 25 is provided on the frame 22, a pinion 27 is provided on the drive shaft 26 of the motor 25, and a rack 28 that meshes with the pinion 27 and is movable back and forth is provided on the frame 22. and the substrate 24 are connected. Then, the delivery body 14 and the delivery belt 19 operate to press the upper surface of the packaging body 3A with its own weight, and the delivery body 14 reciprocates along the rail 20 via the rack 28 and pinion 27, and the packaging body 3A is transferred onto the transfer body 15.
As a result, the packaging film 7 on the front side of the tray 18 is also folded into the lower surface of the tray 18, and is sealed on the transfer body 15 by the heat of the heat sealer 17, and is sent out by the delivery belt 19. On the other hand, as an example of the operation of the rear folding body 12 and the left and right folding bodies 13, as shown in this embodiment, a fixing plate 29 installed on the main body frame 1 on the rear side of the packaging section 2 position in the film folding device E is used.
The base ends of the pair of left and right folding bodies 13 are attached to the lower surface side of the pivot 3.
Rails 31 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 31 is provided with a movable body 32, and this movable body 32
Both ends of the rear folding body 12 are fixed to the left and right folding bodies 13, and a guide groove 33 whose base side is curved inward in the length direction is formed in the left and right folding body 13.
The guide roller 34 provided on the rear folding body 12 engages, and as the rear folding body 12 operates, the rear folding body 12 and the left and right folding bodies 13 move forward and close in synchronization with each other, thereby opening the cradle 5. Top packaged item 3
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.

Furthermore, the rear folding body 1 is attached to one side of the rear folding body 12.
A cam 35 facing in the direction of movement of the cam 2 is provided so that its position can be adjusted freely by a guide groove 36 and a set screw 37, and an arm 38 is attached to the frame 22 of the carry-out device provided with the carry-out body 14. A roller 39 that rides on the cam 35 and operates is provided at the tip. The above cam 35 and roller 3
9 constitute a lift mechanism 40.

The cam 35 has one cam surface 35A that holds the carry-out body 14 at an upper position separated from the packaging body 3A before the carry-out operation of the rear folding body 12, that is, during the folding operation.
and the other cam surface 35B which is brought into contact with the packaging body 3A by lowering the carrying body 14 at or slightly before carrying out. As the rear folding body 12 operates, the film 7 is folded by the mutually synchronized three-way folding action of the rear folding body 12 and the left and right folding bodies 13. At this time, as the rear folding body 12 moves, the film 7 is folded. The cam 35 also moves together, but since the roller 39 continues to engage with one cam surface 35A of the cam 35, the delivery body 14 remains separated from the packaging body 3A, and the rear folding body 12 is finally moved. At or slightly before reaching the package 3A, the roller 39 engages with the other cam surface 35B of the cam 35, so that the carry-out body 14 descends and comes into contact with the upper surface of the package 3A, and is carried out by the operation of the carry-out body 14. Further, as the rear folding body 12 returns to the rear, the motor 25 rotates in the opposite direction, and the carrying out body 14 returns via the rail 20. In that case, the piston 41A is installed on the main body frame 1 side.
A cylinder 41 is pivotally supported on the frame 22, and a resistance force is applied by an adjustment member 42 consisting of the cylinder 41 and a pinion 41A to suppress vertical vibration of the frame 20. In addition, cam 3
5 with the groove 36 and the set screw 37 to adjust the time when the roller 39 moves from one cam surface 35A to the other cam surface 35B and the delivery body 14 comes into contact with the upper surface of the package 3A. is possible.

In the above embodiment, the cam 35 was provided on the rear folding body 12 side, and the roller 39 was provided on the carrying-out body 14 side.
A cam 35 may be provided on the side, and although a cam mechanism is shown as the lift mechanism, it may be configured so that the delivery body 14 is pressed against the packaging body 3A and conveyed by the operation of a cylinder.

In the packaging machine configured in this way, the delivery body 14 is connected to the substrate 2 as shown in FIGS. 1 and 2 A and B.
Soft pressure members 24A, 24A, which are abutting parts, are fixed to the left and right sides of the tray 18 along the moving direction of the carrying out body 14, and between the left and right soft pressure members 24A, 24A, wetlands etc. stored in the tray 18 are stored. A recessed portion 14A is configured to receive the upper circumference of the object 18A. In addition, the left and right soft pressure members 24A, 24A are connected to the central inclined portion 4.
3 has a thick wall portion 44 on the base side and a thin wall portion 4 on the tip side.
5 are respectively formed, and a large number of anti-slip protrusions 46 are formed on the contact surface. If the stored object 18A, such as a wetland, is stored in the tray 18 in such a way that it swells up from the mouth of the tray 18, when the rear folding body 12 reaches its final stage of movement, or slightly before that, the carry-out body 18A When the transporter 14 descends and comes into contact with the upper side of the package 3A, the stored object 1
The raised portion 18B of 8A is arranged at the position of the recessed portion 14A, and the left and right soft pressure members 24A, 24A are brought into contact with the upper edge sides of the tray 18 on both sides. In this way, the left and right soft pressure members 24A, 24A are connected to the tray 1.
The packaging body 3A is transferred from the pedestal 5 to the transfer body 15 by the operation of the carry-out body 14 while in contact with the upper edge side of the package body 8 . Therefore, even if the stored object 18A in the tray 18 is swelled up from the mouth, the stored object 18A
The raised portion 18B of A is disposed in the concave portion 14A formed by the recess of the carrying object 14, so that the stored items 18A
This can effectively prevent the raised portion 18B from being crushed by the delivery body 14. In addition, the left and right soft pressure members 24A, 24A have a thick wall portion 44 on the proximal end side and a thin wall portion 45 on the distal end side due to the central inclined portion 43, so that the upper edge portion 47 on the rear side of the tray 18 Since the package 3A can be transferred while the soft pressure members 24A and 24A are in contact with each other in a wrapping manner, it is possible to stably transfer the package 3A with a small portion of the unloading body 14 in contact with the package 3A, further reducing damage to the package 3A. Good prevention. Furthermore, as shown in Figure 3, the board 2
4, a soft pressure member 24B may be provided on the entire surface of the soft pressure member 24B, the right and left sides of the soft pressure member 24B may be made into thick wall portions 24C serving as thick contact portions, and the recessed portion 14A may be formed between the thick wall portions 24C.

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, this recessed part
4 may be provided with a notch hole to form a recessed portion. Furthermore, the shape and size of the concave portion can be selected as appropriate, and it goes without saying that the packaging machine can be adapted to supply items to be packaged without using a pedestal, or to various packaging methods. .

[Effects of the invention] The present invention includes a film supply device that supplies a stretch film to a packaging section position, a packaged article supply device that supplies a packaged article containing items stored in a tray to the packaging section position, and A packaging device that includes a film folding device that folds a stretch film onto the underside of an object supplied to a packaging position by an object supply device, and a carry-out device that carries out a package with the film folded into the object. In the machine, the unloading device includes a frame pivotably supported on the main body frame side so as to be vertically rotatable, an unloading body provided on the frame so as to be movable back and forth, an actuating device for the unloading body, and a film folding device. A lift mechanism is provided for lowering the delivery body into contact with the packaging body in accordance with the final folding operation, and the delivery body has a recessed portion capable of receiving the upper part of the contents of the packaging body, and a periphery of the recessed portion. and a contact portion that abuts the peripheral edge of the tray of the packaging body, so that even if the contents are rising from the mouth of the tray or other container, the contents can be packaged without damaging the contents. It is possible to provide a packaging machine that can transport a body while stably holding it.

[Brief explanation of the drawing]

1 to 9 show an embodiment of the present invention,
Figure 1 is a perspective view, Figures 2A and B are cross-sectional views showing the state of contact between the delivery body and the packaging body, Figure 3 is a perspective view of another embodiment, and Figure 4 is a longitudinal cross-section of the entire packaging machine. Front view, No. 5
The figure is a plan view of the same, Figures 6A, B, C, and D are working state diagrams showing the packaging state, Figure 7 is a plan view of the main part,
The figure is a side view, and FIG. 9 is a sectional view. DESCRIPTION OF SYMBOLS 1... Body frame, 2... Packaging section, 3... Item to be packaged, 3A... Packaging body, 7... Stretch film, 14... Carrying out body, 14... Recessed part, 15
...transfer body, 18...tray, 18A...accommodated object, 20...rail, 22...frame, 24A
...Soft pressure member (contact part), 24C... Thick wall part (contact part), 40... Lift mechanism, A, B... Item supply device, C... Film supply device, E... Film packaging device, F... unloading device.

Claims (1)

[Scope of utility model registration request] A film supply device that supplies a stretch film to a packaging section position; a packaged article supply device that supplies a packaged article containing items stored in a tray to the packaging section position; A packaging machine equipped with a film folding device for folding a stretch film into the lower side of an object to be packaged, and a carry-out device for carrying out a package with the film folded into the object to be packaged, the carrying-out device comprising: ,
A frame pivotably supported on the main body frame side so as to be vertically rotatable, an unloading body provided on the frame so as to be movable back and forth, an actuator for the unloading body, and an actuating device for the unloading body, which operates the unloading body according to the final folding operation of the film folding device. Equipped with a lift mechanism that lowers it into contact with the package,
The delivery body is characterized in that it is provided with a recessed portion capable of receiving the upper portion of the contents of the packaged body, and a contact portion provided around the recessed portion and abutted against the peripheral edge portion of the tray of the packaged body. A packaging machine featuring: