JPS6181909A - Packer for article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an apparatus for wrapping articles with a film having heat-adhesive and heat-shrinkable properties.

The prior art apparatus for wrapping articles with such plastic films generally includes an article feeding apparatus, a film feeding apparatus, a cylindrical shape (12) for folding the film into a cylindrical shape, and an apparatus for wrapping the article in a cylindrical shape.
It consists of a sealing device that melts and welds the film to make it into a package for each article, a heat tunnel that heat-shrinks the film of the package, etc.

So this! At r1vc position, fold the film into a cylinder 11
The process involves opening the film while bending it and inserting an article into it. When the film is bent into a cylindrical shape, there are cases in which the ends of the film are brought together at the sides, and cases where they are brought together at the bottom. In the end, the joints are glued together, or they are made with clay (as is), and then heat-shrinked to make them stick together.

In any case, if the films are combined on six sides, the packaging will not be good in terms of appearance, so especially for articles where the appearance of the packaging form is important, it is desirable to have the films combined on the bottom side.

However, among the conventional devices of this kind, the device that wraps the bottom T' film together is a device that, as shown in FIGS. was folded into a cylindrical shape by wrapping it in a former, and its form was held by the left and right trochanters 3.3 on the lower surface guiding the RA portions 2a and 2b of the film inward. 3. If the balance in 3 is disrupted, the seam 4 of the film 2 will shift sideways and the packaging will look bad, as shown in Figure 3, and when sealing, the seam 4 will shift from the sealing device 5. However, the problem was that the seal was incomplete.

As shown in the figure, in the conventional apparatus of this kind, the articles 6 are sequentially fed through the former by extrusion, and a claw 8 is attached to the belt 7 of the article feeding device. were provided at equal intervals, so the supply interval of the goods was constant, and the film was supplied intermittently in accordance with this.
And sealing device i! 9 was the one that worked, so claw 8
．． If there is a spot 10 where the article 6 is not placed at the 8th opening, there is a disadvantage that the film is wasted accordingly.

Purpose of the Invention The present invention provides a packaging device for articles in which the film is joined at the bottom as described above, in which the seam of the film does not shift laterally, and even if the article is irregularly supplied, it is possible to The purpose is to ensure that a sufficient amount of film is supplied and that even if the size of the article is irregular, it can be appropriately packaged.

Structure of the Invention To clarify the structure of the present invention with reference to the drawings of the embodiments (FIGS. 4 to 13), there is a 7t-shaped structure in which the film is folded into a cylindrical shape behind a sealing device 19 that laterally fuses and seals the plastic film f. A film 17 is installed in the front and rear cylinders, and a film image (lll
l ra ut (ra ut (r a , r b) In an article packaging device in which the closing pieces 22a and 22b are connected inward and facing inward, place the delivery edge of the bifold film just north of 7r-'f. Provided parallel to 7t-7, former entrance Z3
There is an angle that gradually escapes forward from the upper end of both side plates to the inner end of the closing piece, and that angle makes the film 7t-
The former is formed with inclined edges 24 and 25 that can be reversely opened by flipping from the outside to the inside of the former, and the transfer belt 14 for transporting the articles to the sealing device is inserted into the former from the entrance and supported in a cantilevered manner at the rear end. , the sealing device is configured so that it is actuated as soon as the article passes through the sealing device.

Embodiment ゛ (Mizo-kari) Figures 4 to 13 show an embodiment of the present invention.

On the longitudinally long platform 11, from the rear, there are a supply belt 13 for the article IZ, a belt 14 for transporting the article from the supply belt 13 to the sealing device 19, and a conveying belt 15 for conveying the article from the sealing device 19 to the channel 16. A transfer bell) 14 is inserted into the 527t-717 so that the article 12 can be loaded and fed through the former 17, and above the former 17 is provided a feeding device 18 for the film r. be.

7t-717 has left and right IN deflection plates 17A, 17[
[17A and 17B are divided into 3 parts and bent at the positions indicated by the 1 lines. As shown in FIG. 7, the side plate 20 is
A, green bent piece 21a, , inward at the upper end of 20b.
2 l b and a closing piece 22 of film ``on the lower end.
-a and 22b protrude inward, and both closing pieces 2
2a and 22b are assembled so as to overlap vertically.

And Forma 17 is this rain and sky direction board 17A.

17B, the inlet 23 opens at the rear end and escapes forward at an angle of about 45 degrees from the upper ends of the side plates 20a, 20b to the inner ends of the closing pieces 22a, 22b. Slanted edges 24 and 25 are formed.

Both closing pieces 22a, 22b are connected to the inclined opening edges 25, 2
5, it is not necessary to have a special shape, but the double-opening mating pieces 22a are formed so that the guide rollers 26a, 26b of the film can be joined to the lower surfaces of the double-opening mating pieces 22a, 22b, respectively.

The rearward length of 22b is made to have a difference in length and shortness at different levels. Note that the opening pieces 22a and 22b may have the same shape and a joining plate (not shown) for the trochanters 26a and 26b may be provided.

Regarding the intermediate adjustment device 27 of 7-717, brackets 28 and 28 are provided protruding from both left and right ends of the stand 11, and the horizontal shaft 2
9, and the horizontal shaft 29 has a right side screw 29a and a left screw 29b formed like a turnbuckle, and a right side deflection plate 17A is attached to the right side screw 29a, and a left direction change plate 17B is attached to the left side screw 29b. , 30a, 30b are hinged to the hinges 29a, 29b, and 31 is hinged to both sides 29a, 29b.
The guide rod 32 is a handle for rotating the horizontal shaft 29.

The transfer belt 14 following the supply belt 13 is the supply belt 13
It rotates much faster than the

Moreover, the transfer belt 14 not only passes through the inside of the 7-hole 717, but also passes through the film r opened by the former 17.
Since it passes through the inside, I made it cantilevered near the entrance 23 of 7t-ma 17 and pushed one inside. A platform 111.1m 1m plate 33 is constructed near the entrance 23 as a stage T, and a supporting plate 34 of the bell N4 and a film r1. :
The insulating plate 35 is formed into a wide and thin channel shape, and the supporting plate 34 is housed in the insulating plate 35. Because of this structure, the belt 14 is reversed from the upper surface to the lower surface of the support plate 34 on the insulator &35, so that the film r underneath does not move back due to the reversing action of the heald 14. Further, in order to reduce the overall thickness of the belt 14, a presser roll 36 is provided at the base end.

Next, the feeding device 18 for the film r feeds the folded film r from the roll F rotatably placed above to the 7-oh 717 via several guide bars 55 and 56 parallel to the belt 14. However, as shown in FIG. 7, the final guide bar 56 at the lower end is configured such that the film feeding green E is located at the center of the width of the former 17. Reference numeral 41 denotes a support arm of the final guide bar 56; is a pillar.

In addition, the roll device 19 has a stand 38 under the type/-ra 37, and is supported by a pressing force of 39 and 40 shillings! When the film roller 37 presses the film f onto the support table 38, the film f is fused by the blade at the center of the film roller 37, and is bonded by the heat bars on both sides thereof. Reference numeral 48 denotes a drive roller over which the article 12 passes, and a free roller 45 which presses the article 12 with a force of -43 and 44 shillings above the drive roller 48 and a rear roller 49 of the conveyor belt [5]. , 46 are provided. This prevents troubles such as the article 12 stopping under the roller 37.

50+51'+52 are phototubes for detecting the flow of articles.

(A1 = for use) Since the packaging device according to the present invention has the above-described structure, in order to set the film in the open state, the roll film F must be placed in a state with its bent edge 53 facing opposite to the flow direction of the article 12. and put it on the feeding device 18. Then, the packaging device is operated A.
At f, the bi-fold film `` pulled out from the roll film F is opened and placed over the nf end of the 7 frame 17, and pushed into its entrance 23.Then, the bi-fold film `` is reversed in 7↑-717. Since there is one opening, insert the film at both ends fa and rb.
The closing piece 22a is inserted under the insulating plate 35 of No. 14,
22b, and in this state, pull out the leading end of the film r from the front end of the 7-hole 717 until it passes through the roll device 19.

When the film r is centered in this way, the feed green E of the guide bar 56 is at the center of the width of 7f-717 as shown in FIG. , and the crease 57 is positioned at the center of the width of the 7-o 717. In addition, the film r is folded back by the predetermined ii'if force at the inclined edge 24, 25 of the inlet 23 of 7↑-717, and has a stable engagement relationship with the edges 24, 25, so that the film Since the isosceles triangle does not lose its shape, the left and right guide trochanters 26a.

Even if there is a difference in quality between 26b and 26b, the film will be prevented from shifting to the left or right, and the opening of the film will be kept in its normal shape.
! be done.

Note that the film feed ME on the guide bar 56 is 7th and 17th.
If the position of the middle dog deviates from the position of the middle dog, the shape of the film is regulated by the shape of the deviation. Such a packaging form is also appropriate depending on the article.

When the apparatus is then operated, the articles 12 placed on the supply belt 13 are transferred to the transfer belt 14 and placed thereon at 7f-
At 717, the film enters the opened film r, and the film f
Since it passes through the sealing device 19 while passing through the inside, the sealing device 19 is activated at the same time as it passes, and the film f is fused and cut 7.
8 items are placed, and the state shown in Fig. 10 is formed (a sealing part 54 is formed at the tip of the film f. Therefore, only the first item is just a sink and is not sealed (the edge of the surface is open), but next time Since the article is supported by the sealing part 54, when the article 12 pulls out the film f and passes through the sealing device 19, the rear side is also sealed.
The packaged article 58 has both front and rear ends rolled.

Although the lower surface of this article 58 is simply joined with a film, due to the heat shrinkage in the next heat tunnel 16, i) the joined surface of the film becomes dense;
The final packaged article 59 has no particular problem in terms of airtightness as a packaging form, and since the lower surface of the rim is not fused, it is convenient for opening 1 (. It is also possible to add 78 films by combining them in a mating pattern or a haimi pattern.

Since the film r is pulled out by the movement of the article IZ as described above, the film r is not pulled out excessively, and the film r is not pulled out excessively until the next article 12 is attached to the sealing part 54 at the tip of the film r. Withdrawals have stopped. Therefore, no matter how long the distance between the articles is, the sealing device will not run idly, and even if the articles are crowded, sealing can be performed as long as there is a small gap between them.

Moreover, the supply bell [when an item is placed on 3, that bell) 13
Due to the slow movement of the conveyor belt 13, many articles can be kept on the supply belt 13 because the articles stay there for a long time. Since the speed of the transport belt 14 is high, the article is quickly carried to the leading edge of the film r, and the article is sealed at the same time as it passes through the seal v device 19. Therefore, the article is not left on the supply bell [3]. Even if the articles are lined up in a regular manner or in a cramped and miscellaneous manner, the articles that are even slightly ahead will take priority and run far away from the articles that follow, so there will be no problem in the operation of the sealing device 19.

Further, since the seal v device 19 is activated when the article IZ passes through the detection position due to the detection of the charging l1752, the article is sealed with an appropriate size regardless of the length of the article.

Furthermore, regarding the size of the article, it is necessary to accommodate the size relationship by changing the width of the film r, but this can be done simply by adjusting the width of the former 17 as an apparatus.

Effects of the Invention This invention exhibits remarkable effects similar to those described above.

1) The product is packaged with the film closed on the bottom side, but unlike conventional devices of this type, the closing position of the film does not deviate from the desired set position, so there is no problem. It is possible to prevent operational troubles that would result in complete packaging, and to improve the appearance of packaging.

2) According to the supply of 91 products, the necessary amount of 7 (lumka) is drawn out, and the correct amount of film is used and colored. Therefore, the economical efficiency in using the film can be improved. Even if the size of the item is irregular, such as vegetables or fruits, it is very convenient because all items can be appropriately packaged6.It is also very convenient to package items at regular intervals in time or distance There is no need to supply it every time, and if it is supplied to the transfer belt at a certain interval or more, there will be no problem in operation, which is convenient for one-way operations.

3) Inside the former, the goods are transported on a belt, so passing the goods through the former is different from the case of continuously extruding the goods.
This can prevent troubles such as items getting stuck in the former.

[Brief explanation of drawings]

Figures 1 to 3 show a conventional packaging arrangement, Figures 1 to 1 are explanatory diagrams of the entire device, Figures 2 to 1 are cross-sectional views of the 7t-ma to explain the closing of the film, and Figure 3. FIG. 2 is a cross-sectional view of the former showing a state in which the film is improperly closed. 4 to 13 show an embodiment of the present invention, FIG. 4 is a perspective view showing the entire y&f position, FIG. 5 is a perspective view of the main part showing the opening state of the film, and FIG. The figure is a bottom view of the same essential parts, and Figures 7, 8, and 9 are the A-A lines of Figure 6 and B.
10 is an explanatory diagram of the entire device; FIG. 11 is an explanatory diagram showing the former's deflection plate in a state before bending and forming; FIGS. 12 and 13 are sectional views of the article. FIG. 2 is a perspective view and a bottom view showing the packaged state of the product. 14... Transfer heald 17... 7 spacer 19... Seal device 20a, 20b... Former 911+
122a, 22b-7t-Ma's closing piece 23... 7-ma's entrance 24.25...Slanted edge E...Film feed is shown in Fig. 1, Fig. 2, Fig. 3, Fig. 7 Figure 6

Claims (1)

[Claims] 1) At the rear of the sealing device that welds and welds the plastic film horizontally, a former that folds the film into a cylinder is installed in the front and back through the cylinder, and the closing pieces that align both ends of the film with the lower ends of both side plates of the former face inward. In a device for packaging articles that are arranged in series, the delivery edge of the bifold film is provided directly above the former in parallel with the former, and an angle is formed at the entrance of the former to gradually escape forward from the upper end of both side plates to the inner end of the closing piece. The angle forms a slanted lip that can flip the film from the outside to the inside of the former to open it in reverse, and the transfer belt that sends the article to the sealing device is thrust into the former from the entrance and cantilevered at the rear end. An apparatus for packaging articles, which is supported by a sealer and is configured such that the sealing device is actuated at the same time the article passes through the sealing device.