JPH0253292B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose of the Invention [Field of Industrial Application] The present invention provides a method for making it easy to expand and expand a folded flat bag so that it can stand on its own immediately before filling with contents, and a method that can be used directly to carry out the method. The present invention relates to a bag feeding device.

[Prior Art] The procedure for expanding and forming this type of folded flat bag 6 (hereinafter simply referred to as a bag) so that it can stand on its own is shown in Fig. 1A,
B, C, D, as shown in Figure 2 A, B, C, D and Figure 3 A, B, C, D, the lower part of both side edges of the bag 6 is held at the upper part of both side edges by clamps 7a and 7b. is held loosely by the bag shaping device α [see each figure A], and the opening is sucked by the suction pieces β and β and pulled apart in the direction of the arrow, while at the same time the suction pieces 7a and 7b are brought close together in the direction of the arrow to open the bag. [See each figure B], insert the conical air jet nozzle 15 into the opening 6a from directly above the arrow [see each figure C], and fill the bag 6 with the contents by jetting pressurized air from the air jet nozzle 15. Freely expand and expand to full bloom (see each figure D).

However, since the bag 6 is made of retortable aluminum foil or plastic, the folds 6b, 6c, and 6d at the bottom have strong shape retention, and a considerable amount of air injection pressure is required to fully open the bag. The injection pressure may cause pinholes in the bag 6 or damage the bag 6.
If both edges come off the clamps 7a and 7b, or if the lower part is bent to one side as shown by the imaginary line in Figure 1A, only one side will expand as shown by the imaginary line in Figure 1D. Cases occur frequently, and as a result, it becomes necessary to hold the lower part loosely with the bag shaping device α and expand it while shaping it vertically, which hinders the filling of contents in the next process, especially in winter.

[Problems to be Solved by the Invention] In view of the above-mentioned drawbacks, the present invention provides an effective and appropriate self-supporting method for smoothly expanding and expanding the folded flat bag into a self-supporting state by heating the bottom of the bag 6 with emphasis. It is an object of the present invention to provide a method for expanding and forming a bag and a bag feeding device.

(2) Configuration Example 1 of the Invention An example of the packaging device X to which the present invention is applied will be described below based on the drawings. In the figure, reference numeral 1 denotes the base of a packaging device A turntable 3 is attached to the upper end of the . The turntable 3 is configured to rotate intermittently by a predetermined angle in synchronization with a drive signal sent to the drive mechanism 2.

In addition, bag holders 4 (only a few places are shown) are protruded radially from the peripheral wall of the turntable 3 at predetermined intervals, and the bags 6 are supplied from the bag supply device 5 in an upright position. It is designed to be held by holding both sides of the lower opening. These bag holders 4...
consists of a pair of holding arms 8, 8 having clamps 7a, 7b which are biased so that their opposing surfaces are always in pressure contact with each other.

Guide rollers 9 are attached to the tips of the holding arms 8, 8, respectively, and these guide rollers 9, 9 form a guide body 1 disposed along the transfer path.
0..., one of the clamps 7a, 7a resists the force and the other clamps 7b,
7b so that a predetermined gap is formed between the mutually opposing surfaces. Further, the holding arms 8, 8 are supported by a support base 11 provided on the lower surface of the turntable 3 so as to be able to come into contact with and be separated from them, and guide rollers 12, 12 are fixed and guide rails 13 are movable in the vertical direction. Support legs 14, 14 are connected in series, and are moved closer or further apart depending on the height of the guide rails 13, so that the opening 6a of the held bag 6 becomes tense or relaxed. It is becoming more and more common.

This constitutes a bag transfer mechanism that intermittently transfers the bag 6 while holding it in a predetermined state.

On the other hand, in the vicinity of the transfer path of the bag 6, the bag holder 4...
A bag supplying device 5 configured as described later and sequentially supplying bags 6 having an opening 6a on the top surface in a three-dimensional state is disposed at a position corresponding to the bag supplying device 5.
A bag holder 4 is provided on the bag transfer direction side of this bag supply device 5.
A bag opening device 16 is provided that opens the bag 6 into a predetermined shape by inserting a conical air jet nozzle 15 into the opening 6a of the bag 6 held by the bag 6 and jetting pressurized air. Furthermore, the bag opening device 1
On the bag transfer direction side of 6, there is a solid material input device 17 for charging pre-cooked and weighed solid materials such as meat and vegetables into the bag 6, and a viscous material filling device 18 for filling viscous materials such as curry soup. (neither of which are shown in detail) are arranged in sequence. Further, on the side of the viscous material filling device 18 in the bag transfer direction, a bubble removing device 20 is provided which is equipped with a vibrator 19 that hits the bottom of the bag 6 to release the bubbles present in the filling. A degassing and sealing device 21 (not shown in detail) is disposed on the bag transfer direction side of the bubble removing device 20, which presses and deaerates the bag 6 and then seals the opening 6a by heating and pressing. . Further, on the bag transfer direction side of this degassing sealing device 21, there is a main sealing device 22 that heats and presses the sealed portion of the sealed bag 6 again, and a main sealing device 22 that presses and cools the sealed portion. Seal correction device 23 for removing wrinkles
are arranged sequentially.

It also constitutes a packaging cycle that automatically packs curry and other items into bags.

Further, when the bag 6 that has been packaged is moved facing the seal correction device 23, the guide rollers 9, 9 of the holding arms 8, 8, which hold the bag 6, are moved to the guide body 10 when the turntable 3 is intermittently transferred by one pitch. Upon contact, it is released and falls onto the carry-out conveyor 24, and the bag holder 4 is again faced to the bag supply device 5 in an empty state.

Next, the bag feeding device 5 of the present invention will be explained. That is, a stack chamber 25 is provided on the base 1 in which a plurality of bags 6 are accumulated in a stacked state and in an upright position. This stack chamber 25 has a panel heater A attached to the outer bottom surface and a bottom plate 2 inclined at approximately 10 degrees.
6, and side plates 27, 27 whose dimensions between mutually opposing surfaces can be adjusted according to the size of the bag 6, and a static electricity eliminating conductive plate (both not shown) grounded via a conductive wire is provided on the inner wall surface. supply stand 28
and a back-up plate 29 that supports the rear surface of the stored bags 6. Further, the backup plate 29 is connected to the supply table 28.
The bag group 6
Bag feeding mechanism 3 that presses and transfers ... with constant pressure in the surface direction
1.

On the other hand, a stopper 34 consisting of a plurality of screws 32, rods 33, etc. is disposed near the opening edge of the front end of the stack chamber 25, that is, the opening edge corresponding to the lower part of the bag transfer path on the inclined lower end side. This prevents the frontmost bag 6 from flying out.

Further, a pair of suction cups 35 as suction elements are disposed above and below the front surface of the stack chamber 25 so as to face each other. These suckers 35, 35 are larger downwardly,
It is formed so that the upper part is small and communicates with a vacuum pump (not shown) through a pipe 36, and can move forward and backward in conjunction with the movement of a horizontally movable bracket 37. A suction/takeout mechanism 38 is configured to take out the frontmost bag 6 in the stack chamber 25 by vacuum suction.

Further, the suction cup 3 of this suction and extraction mechanism 38
A bag supply body 39 is placed in a state perpendicular to the transfer paths 5 and 35.
is installed. This bag supply body 39 includes a vertical flat plate 40 having a reference wall surface 40a and this flat plate 4.
Holding plate 41 connected to the lower edge and both side edges of 0...
It is attached to the upper end of the vertical movement shaft 42. Then, the bag holder 4, which is a part to be supplied, receives the bag 6 taken out by the suction take-out mechanism 38.
It is now being transferred to

Further, the flat plate 40 of the bag supply body 39 has a sixth
As shown in detail in the figure, notches 43, 43 are provided at both ends of the upper part to avoid contact with the clamps 7a, 7b when rising, and the suction cup 35,
An adsorbent insertion/removal port 44 is provided, which is a long hole that is elongated in the vertical direction so as not to obstruct the movement of the suction member 35 .

On the other hand, on both sides of the opening edge of the front end of the stack chamber 25, as shown in FIG. A rod-shaped bag presser nozzle 4 that communicates with a pressurized hot air source (not shown) through the
5,45 are arranged. Then, hot air is blown toward the bag 6 taken out into the bag supply body 39, and the bag 6 is pressed against the reference wall surface 40a of the bag supply body 39 to shape the bag and maintain heat retention, thereby preventing the bag 6 from being bent. , and an air blow shaping device 4 for correcting the deformation.
7.

Next, a case where the method of the present invention is applied to the above embodiment will be explained.

First, in the case of the aluminum foil bag groups 6 using the panel heater A whose temperature can be adjusted in advance, the bags 6 are stored all at once in the stack chamber 25 where the bottom surface of the stack chamber 25 is heated to, for example, about 97 degrees Celsius. 6. Focus on heating the bottom part to about 40-50℃, for example.
The bags 6 are held by the backup plate 29 and urged toward the front side with a constant pressure, and then a start button on a control panel (not shown) is pressed. The suction cups 35, 35 then start moving forward in synchronization with this start signal. These suction cups 35, 35 are the bag supply body 3
9 into the stack chamber 25.
When it comes into contact with the frontmost bag 6 of the bag group 6... and reaches a position where it is pushed back slightly (about 5 mm) against the pressing force of the back-up plate 29, the suction cups 35, 35
vacuum adsorption is performed. When sufficient time has elapsed for the suction cups 35 to vacuum-adsorb the bag 6, the suction cups 3
5 and 35 start to retreat, and the frontmost bag 6 in the stack chamber 25 is taken out against the holding force of the stopper 34. Then, the taken out bag 6 is attached to the suction cups 35, 3.
5 passes through the suction element insertion/removal port 44, the pressure becomes normal and the suction is released, so that the bag supply body 39
Once received within the

On the other hand, at the same time that the suction cups 35, 35 adsorb the bag 6 and start retreating, warm air is blown from the bag holding nozzles 45, 45, and the bag 6 is pressed against the reference wall surface 40a side of the bag supply body 39 due to its own weight, etc. It corrects bending and deformation and maintains heat retention.
In this state, the bag supply body 39 rises and supplies the bag to the bag holder 4, and at the same time, the blowing of hot air from the bag holding nozzles 45, 45 is stopped.

In this way, when the bags 6 are supplied, the turntable 3 is rotated one pitch intermittently, and the guide rollers 9, 9 at the tips of the holding arms 8, 8 forming the bag holder 4 are moved to the rod-shaped guide body 10, The bag 6 is removed from the bag opening device 10, and both ends of the opening of the bag 6 are held by the clamps 7a and 7b, and the bag 6 is transferred to the bag opening device 16 side. On the other hand, at the same time that the bag 6 is held by the bag holder 4, the bag supply body 39 descends and waits to complete the supply operation.

In this way, the bags 6 in the stack chamber 25 are taken out one by one and supplied.

Embodiment 2 Next, a second embodiment of the device of the present invention will be described with reference to FIG. 4. In place of the panel heater A attached to the stack chamber 25, a group of hot air blowing holes 48 are provided in the bottom plate 26.
It blows hot air toward the bottom of the bag group 6, which is waiting to be accumulated with a large number of through-holes, to heat the bag group 6 to the same degree as the panel heater A, and actively removes the bags 6, 6 that have been attracted by static electricity and moisture. It is designed to prevent multiple sheets from being removed at the same time.

Embodiment 3 A third embodiment of the device of the present invention will be described with reference to FIG. 4. In the packaging device B, B, for example, heat ray irradiation means;
By arranging panel heater means, hot air blowing means, steam blowing means, etc. in parallel, the bag 6, especially the bottom part, is focused from both sides while the bag 6 is being transferred from the bag feeding device 5 to the bag opening device 16 in the next process. It becomes heated.

[Other Embodiments] In yet another embodiment, a combination of the hot air outlet group 48 in the front row and the panel heater A is used to take out two bags by using warm air from the warm air outlet group 48 in the front row. It can also be prevented.

In addition, panel heaters are attached to the side plates 27, 27, a group of hot air blowing holes are provided, and a lid 49 is pivoted so that it can swing and open as shown in the imaginary line in Fig. 7 in order to improve thermal efficiency. It is also possible to maintain airtightness by putting a cover 50 on it.

[Function] Accordingly, the present invention, when expanding and forming the bag 6 into a self-supporting side using the bag opening device 16, requires a step in which the bag 6 is stored in the stack chamber 25 of the bag supplying device 5 in advance, or a stage in which the bag 6 is stored in the stack chamber 25 of the bag supply device 5, At the stage of transporting the bag group 6 from the bag feeding device 5 to the bag opening device 16, one or more of panel heater heating, warm air blowing additional heat, heat ray irradiation heating, steam blowing additional heat, etc. is used. This is done after heating the bottom portion intensively using a suitable combination of heating means, thereby facilitating expansion and expansion molding of the bag group 6.

Although the embodiment of the present invention has been shown for convenience as an example in which it is adopted as a packaging device for packaging pre-cooked curry, etc., the present invention is not limited to this, and it is also possible to supply folded flat bags one by one and fill the contents. Any packaging device can be used as long as it is an expansion molding process.

(3) Effects of the Invention Thus, the present invention has been developed by heating a folded flat bag to an appropriate temperature in advance prior to the operation of expanding and forming it to full bloom when filling the bag with contents, so that the folds of the folded portion of the bottom part, which have a particularly strong shape-retaining habit, are heated to an appropriate temperature. 6b, 6c, and 6d are relaxed to add flexibility to the entire rigid bag, so it is easy to omit the bag shaping device α without increasing the jet pressure from the air jet nozzle 15. When the bag is inflated, pinholes may be formed in the bag, both edges of the bag may come off the clamps 7a and 7b, or only one side of the bag may be inflated as shown by the imaginary line in Figure 1D. There are no such troubles throughout the year, a small-capacity compressor is sufficient for expansion, and excellent effects are achieved, such as increasing the operating rate of the packaging equipment.

[Brief explanation of drawings]

Figures 1 to 3 A, B, C, and D are explanatory diagrams illustrating step-by-step the conventional expansion molding procedure for this type of self-supporting bag, and Figure 4 is a packaging to which the present invention is applied. 5 is a partially longitudinal side view of the apparatus of the present invention installed in the packaging apparatus X, FIG. 6 is a rear view thereof, and FIG. 7 is an enlarged side view of the main parts thereof. A...Panel heater, B...Heating means, X...
...Packaging device, 4...Bag holder, 5...Bag feeding device, 6...Bag, 6a...Opening, 7a, 7b...
Clasp, 16... Bag opening device, 25... Stack chamber, 26... Bottom plate, 27... Side plate, 48... Warm air outlet.

Claims (1)

[Scope of Claims] 1. When expanding and forming a retortable foldable flat bag made of aluminum foil or plastic, the bottom of the folded flat bag is heated to a predetermined temperature from the outside using appropriate heating means at an appropriate time. A method for expanding and forming a self-supporting bag, which is performed after heating intensively. 2. The opening of the self-supporting bag as set forth in claim 1 is at an appropriate timing, either at the stage of waiting to accumulate the group of folded flat bags or at the stage of taking out and conveying the group of folded flat bags waiting to be accumulated one by one. Expansion molding method. 3. The appropriate heating means is any one of panel heater heating, hot air blowing heating, steam blowing heating, or a combination thereof.
The method for expanding and forming a self-supporting bag according to item 1 or 2. 4 A panel heater is attached to the bottom of the stack room where multiple groups of folded flat bags are piled up and waiting for accumulation in an upright position, or a group of hot air blowing holes is opened to inflate the group of folded flat bags. A bag feeding device that heats the bottom part intensively before forming.