JPS5931521Y2 - packaging equipment - Google Patents

Description

[Detailed explanation of the invention] Recently, carton containers are made of three layers: polyethylene, paperboard, and polyethylene (both sides of the paperboard are coated with polyethylene). exterior,
There are quite a few carton containers on the market that consist of five layers (aluminum foil side or inner surface).

Since the polyethylene on the inner and outer surfaces is a thermoplastic material, it has the property of being welded when sufficiently heated to melt it and then cooled.

Next, an example of the form of a carton container is shown in FIG.

Note that FIG. 1 is a partially cutaway perspective view for convenience of explanation.

In FIG. 1, a carton container 1 is filled with a liquid 2 such as milk, juice, sake, etc., and the liquid 2 is at a liquid level of H
It shows that it is inserted up to the height of .

3 is the head space above the liquid level, which contains air.

Such a carton container 1 is manufactured from a semi-finished product with a bottom formed as shown in FIG. 2, through a folding process of the top shown in FIG. The top part shown in the figure is sealed liquid-tight, and then the top part is folded flat and welded to form a product, as shown in FIG.

In FIG. 2, 6 and 7 are the front and rear panels at the top of the carton 1, and 8 and 9 are the side panels at the top of the carton 1.

Reference numerals 11 and 12 indicate folding lines provided on the front panel 6, and the rear panel 7 also has similar folding lines 11',
12' is provided.

Also, 13, 14, 15, 16, 17.18 are side panels 8
Similar folding lines 13', 14', 15', 16', 17' are provided on the side panel 9.
, 18' are provided.

In addition, the folding process of the top part shown in FIG.
．． 11', 12', 13', 14', 15',
It is carried out by sequentially folding along 16', 17', and 18'.

Next, in FIG. 4, the shaded part 19 is a liquid-tight seal part.

In addition, the liquid-tight seal is that the front panel 6 and rear panel 7 are
As shown in FIG. 4, the lower halves 6A and 7A of the front panel 6 and the rear panel 7 on the base side of the carton 1 are fully folded in until they are almost perpendicular to the side wall 10 of the base of the carton container 1. It will be held in

20 is a confinement panel in which the upper halves 6B and 7B of the front panel 6 and the rear panel 7 at the top are liquid-tightly sealed and protrude upward in a nearly upright state.

Note that FIG. 1 shows the portion where the closing panel 20 is folded over the lower half 6A of the front panel 6 at the top, and the closing panel 20 and the lower half 6A of the front panel 6 engage with each other. shows welded state.

FIG. 5 is a plan view showing the liquid carton filling machine 30 for manufacturing the carton 1 according to the steps explained based on FIGS. 1 to 4, and only the parts necessary for explanation are shown.

In FIG. 5, 31A and 31B are a pair of transport frames for transporting the carton 1, and are L-shaped so as to engage with one ridgeline in the height direction of the base portion of the carton 1. They are attached to the endless chain 32 at intervals of pitch P.

The chino 32 is stretched by a pair of sprockets 33, 33A that are pivotally supported on a machine body (not shown).

Further, 34 is a chino similar to the chino 32, and is connected to the conveyance frame 31.
A pair of conveyor frames 35A and 35B similar to A and 31B are provided at a pitch P interval, and are stretched by a pair of sprockets 36 and 36A that are pivotally supported on a machine body (not shown).

For chenos 32 and 34, carton 1 is transport frame 31 A, 3
1 B, 35 A, and 35 B.

Furthermore, the chenos 32 and 34 are driven by a drive device (not shown) so as to convey the carton 1 intermittently in the direction of an arrow 37 at intervals of a pitch P.

Reference numeral 38 denotes a rail that supports the carton 1 when it is transported by the chenos 32 and 34, and is fixed to the machine body (not shown).
It is designed to slide on the top.

5 is a step in which the carton 1 shown in FIG. 2 with a molded bottom is supplied.

Step II is a step of forming a folding crease on the top of the carton 1 shown in FIG.

(2) is a step of filling the liquid 2 as the content.

VII is the step of folding the top portion to the state shown in FIG.

X is the step of sealing the top part liquid-tight like the containment panel 20 shown in FIG.

VTI is a process in which the top part is folded flat as shown in Figure 1 and welded.

Incidentally, although III and IV indicate the steps from step II to step (2), detailed explanation will be omitted.

Similarly, descriptions of VI, Vll, and X[, X[ will be omitted.

The chenos 32 and 34 are driven intermittently so as to stop transporting the carton 1 for a sufficient period of time to complete the necessary operations in each of the steps (1) to (2).

Now, the above-mentioned flat type liquid carton filling machine 30
In the process, just before xII (folding welding process), the lower half 6A of the front panel 6 and the rear panel 7 are assembled as shown in FIG.
The upper half 7B is heated by the hot air blown out from the nozzle 5.

Next, as shown in FIG. 7, a guide press plate 25 arranged in the same direction as the traveling direction 37 of the carton 1 is fixed to the carton filling machine, and the top of the carton 1 is conveyed on the rail 38. are engaged with the guide press plate 25 and folded and welded to form a flat/tub type carton as shown in FIG.

However, in FIG. 8, which is the cross section A-A in FIG. As mentioned above, A and 35 B are L-shaped and engage with each ridge line in the height direction of the base portion of the carton 1, so the carton itself may lack rigidity or the filling may be When filling at high temperature, close panel 2 of carton 1 as shown in Figure 9.
There was a problem that the vicinity of the bent portion 26 of 0 was crushed and deformed.

On the other hand, if the force of pressing by the guide press plate 25 is weakened, the confinement panel 20 will bulge as shown in FIG. 10, so this problem cannot be solved.

9 and 10 which are deformed in this way are both unfavorable in terms of the appearance of the carton. In the case of FIG. 10 in particular, the confinement panel 20 has a large bulge, making the cartons very unstable when stacked. there were.

The present invention has been proposed to overcome the above-mentioned drawbacks of the prior art, and includes a front panel extending from each side of a cylindrical body having four sides, a rear panel with a closing panel, and a front panel extending from each side of a cylindrical body having four sides, and a rear panel with a closing panel; A packaging device that includes a conveyance frame that grips a flat type carton having a pair of foldable side panels at the four corners of a cylindrical body, and a conveyor to which a large number of the conveyance frames are attached, and that folds and welds each of the panels. By attaching to the transport frame a presser member that presses the lower edge of the center of the ruled line that forms the joint between the cylindrical main body and the side panel of the carton, deformation of the carton is prevented and reliable flat sealing is performed, It is an object of the present invention to provide a packaging device capable of forming cartons with good appearance.

Below, the embodiments of the present invention will be explained with reference to the drawings.
The figure is a plan view showing an embodiment of the present invention corresponding to FIG. 5, and FIG. 12 is a sectional view taken along line BB in FIG. 11, which corresponds to FIG. 8 of the conventional example.

The following describes only the differences between the present invention and the conventional example.
40A and 40B are conveyance frames adopted in place of conveyance frames 31A and 31B in FIGS. 5 and 8, and the same conveyance frames 40A and 40B are shown in FIG. 9 of the closing panel 20 of carton 1. In order to prevent such deformation in the vicinity of the bend 26, the border 13.13' (FIG. 2) is extended to the seam between the side wall 10 of the base body of the carton 1 and the top side panel 8.9. , forming a pressing member 41 that presses down the central lower edge of the same ruled line.

Now, in the folding welding process ■, the 11th
The carton 1 that has been conveyed as shown in the figure and FIG.
0 is folded and welded as in the conventional method, and the top of the carton 1 is pressed by the guide press plate 25, but in the present invention, the conveyor frames 40A and 40B attached to the conveyor are attached to the sides of the carton. Since the presser member is provided to press the central lower edge of the ruled line that joins the side panel, deformation of the carton is prevented, reliable flat sealing is performed, and a carton with a good appearance can be formed.

Additionally, the present invention can be applied to liquid carton filling machines.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an example of a conventional carton filled with liquid, and Figs. 2, 3, and 4 sequentially show the steps for forming the carton of Fig. 1. Perspective view, 5th
The figure is a plan view showing a conventional liquid carton filling machine, Fig. 6 is a side view showing a state in which the upper and lower halves of the front and rear panels are heated with hot air immediately before the conventional folding and welding process, and Fig. 7
The figure is a side view showing how the top of the carton is folded and welded using a guide press plate, Figure 8 is a sectional view taken along line A-A in Figure 5, and Figures 9 and 10 are each of a conventional confinement panel. A perspective view showing the carton in a state where the vicinity of the bent portion is deformed, 1st
FIG. 1 is a plan view of a liquid carton filling machine showing an embodiment of the packaging apparatus of the present invention, and FIG. 12 is a sectional view taken along the line BB in FIG. 11. Explanation of the main parts of the diagram 1... Carton, 6, 7
・・・・・・Front part of the top, rear panel, 8, 9...
...Top side panel, 10...Side wall (side surface) of base body, 13.13'...Bottom edge of ruled line, 20
・・・・・・Confinement〉Kuneru, 32.34・・・・・・
Cheno (conveyor), 35A, 35B...conveyance frame, 40A, 40B...conveyance frame extending to the ruled line, 41...pressing member.

Claims (1)

[Scope of utility model registration request] A flat-type carton having a front panel extending from each side of a four-sided cylindrical body, a rear panel with a closing panel, and a pair of side panels that are folded into the underside of both said panels. Equipped with a conveyor frame that is gripped at the four corners and a conveyor to which many of the same conveyor frames are attached,
In the packaging device that bends and welds each panel,
A packaging device characterized in that a presser member is attached to the transport frame to press a lower edge of the center of a ruled line forming a joint between the cylindrical main body and the side panel of the carton.