JPS5933765Y2 - Deaerator at bag mouth - Google Patents

Description

[Detailed description of the invention] This invention is a method of filling food, such as ham or sausage, into a cylindrical film made of heat-shrinkable synthetic resin with one bag opening tied, and then filling the other bag, which is opened, with food, such as ham or sausage. This invention relates to a degassing device that can thoroughly remove the air inside a bag and vacuum pack it when closing the bag.

Particularly in the case of food, thoroughly eliminating residual air inside the bag is an essential requirement to maintain quality.
In this operation, 100% removal of residual air is effective only when the transition from deaeration to ligation progresses smoothly.

However, conventionally, as a preliminary step for tying, the bag opening is gathered at the center of the bag, and a deaeration nozzle is inserted inside the gathered position of the bag opening to remove the air inside the bag. When venting and then entering the ligation stage, the bag mouth cannot be ligated unless the deaeration nozzle is removed outwards, so when the nozzle is removed and the shirred portion is ligated at the same time, Outside air flows back into the bag within a very short time from removing the deaeration nozzle to tying the bag opening.
There was a concern that air remained in the bag after ligation.

Therefore, as an example of improving the above defect, the bag opening is made extremely long, shirring is performed at two positions on the bag opening, and when tying, the deaeration nozzle is removed only from the shirring part at the front, and the bag opening is shirred at two positions. A known method is to leave the bond in a state where a nozzle is still inserted into the shirred part of the bond, and tie off the shirred part while continuing degassing.

However, although this improved example can achieve complete deaeration inside the bag, when cutting the excess part of the bag opening, the film tube that becomes the cut off waste becomes more than 10 cm, and during mass production, There was a lot of waste, with piles of tube waste forming in the workplace, and this waste led to higher product costs.

The purpose of this invention is to improve the above-mentioned defects and to create a device that can completely deair the inside of the bag while cutting off the film tube that becomes scraps and cutting off the film tube, which is only 1 to 2 cm, with minimal waste and no waste. and provide it.

The structure of the present invention is to provide a concentric double degassing nozzle inside and outside, so that the inner nozzle can move in and out of the outer nozzle, and when tying the bag, the inner nozzle is immersed into the outer nozzle. Even after the inner nozzle is immersed, the outside nozzle continues to deaerate the bag, and the bottom of the bag is equipped with a degassing aid that causes heat shrinkage, resulting in complete elimination of residual air in the bag. The goal is to further improve

The structure and operation of the present invention will be explained in detail below with reference to the drawings according to a specific embodiment thereof.

FIG. 1 is a plan view illustrating the entire device of the present invention,
The ham 8 is inserted into a single-layer or multi-layer heat-shrinkable synthetic resin tube 7 made of Saran film or the like, and the bag bottom 9 has already been shirred and tied at another location on the workbench 10. It is transported by a transport means not shown above.

As shown in FIG. 2, the workbench 10 has a piston rod 11 connected to its bottom that can move up and down, and as soon as the degassing from the mouth of the bag and the tying are completed, the workbench 10 is moved to a guide 12 by the action of an air cylinder (not shown). The rod 11 rises along the workbench 1
0 is pushed up to the top of the wall 13, the product is transferred along the slope 14 on the wall 13 and carried out to the outside.

On the other hand, the guide 12 of the rod 11 has a workbench 10
Piston rod 1 for operating the work platform in the longitudinal direction
5 are connected to each other, and the rod 15 moves forward and backward with the help of a guide roller 17 under the action of an air cylinder 16 shown in FIG.

When the workbench 10 advances to the forward position, the opened bag lower a of the ham-filled tube 7 on the workbench enters into the center open portion of the shirring and tying cutting mechanism 18 in a 360° open state.

An example of a mechanism for gathering the bag opening and tying the gathered portion with a clip or the like is shown in FIG.

A pair of regulating plates 21 and 22 which are displaceable along the machine frame are provided in parallel between the opposing machine frames 19 and 20, and a quadrilateral shape is formed by the pair of machine frames and the pair of regulating plates. 360° when the pair of regulating plates are in the open position.
The opened bag lower a is inserted into the open quadrangle.

The inner nozzle 24 of the concentric double nozzles 23 and 24 for degassing according to the present invention is protruded from the center of the open rectangle from the direction facing the bag lower a, and the bag lower a is opened 360°. As the nozzle 24 moves forward, the nozzle 24 is inserted into the bag lower a.

The forward movement of the bag lower a is detected by a sensor (not shown), and in response to the detection signal, the pair of regulation plates 21 and 22 are actuated simultaneously by the action of an air cylinder (not shown), and the pair of plates are moved as indicated by the two-dot chain line in FIG. They approach each other from the position indicated by the solid line, and stop at the close position leaving a gap 25 corresponding to a predetermined shirring width.

Due to the proximity of the pair of regulating plates 21 and 22, the bag lower a is changed from a 360° open state to an elongated half-open state (
(See solid line in Figure 5).

The inner nozzle 24 remains inserted into the center of the elongated, half-open bag mouth.

When the approaching movement of the pair of regulating plates 21 and 22 is completed, a pair of tying rods 26 which are provided in the central holes of the pair of opposing machine frames 19 and 20 in opposing positions are moved. and 27 approach each other along the gap 25 between the regulating plates 21 and 22 due to the action of an air cylinder (not shown), so that the elongated and half-opened bag lower a is gathered to the center, and the bag lower a is brought into pressure contact with the outer periphery of the inner nozzle 24 while surrounding the inner nozzle 24.

Each of the pair of pleating and tying rods 26 and 27 has a recess at its tip, and the pressing action of the pair of recesses presses and bends a clip (not shown), and eventually the bag lower a is tied. However, since it is outside the main point of the present invention, its explanation will be omitted, and the previous stage, complete deaeration of the bag, will be described in detail below.

As shown in FIGS. 3, 4, and 6, elastic pads 28 and 29 are attached to the tips of the pair of rods 26 and 27 on the left and right sides of the rods 26 and 27. It is brought into close contact with the outer periphery of the heavy nozzles 23 and 24.

At this time, most of the elastic pad 29 on one side needs to bring the bag lower a into close contact with the outer periphery of the outer nozzle 23, thus completing the connection between the bag lower a and the double deaeration nozzles 23 and 24. .

Among the concentric inner and outer nozzles 23 and 24, the outer nozzle 2
3 has its rear end fixed on the machine frame 30, and is connected to a vacuum pump (not shown) via an exhaust pipe 31.

The inner nozzle 24 is connected to the outer nozzle 2 as shown in FIG.
While maintaining a slight gap between the bag and the inner peripheral wall of the bag, the tip of the bag is inserted into the outer nozzle 2 when air is discharged from the bag.
3 and 6), and retracts into the outer nozzle 23 when tying the bag (FIG. 4).

The rear end of the inner nozzle 24 is connected to a piston rod 34, and the rod is moved back and forth by the action of an air cylinder 33 on a bracket 32 that is integral with the machine frame 30.

The exhaust from the inner nozzle 24 is connected to a vacuum pump (not shown) via an exhaust pipe 35.

In FIG. 1, an electric heater 37 is provided at the rear of the workbench 10 to face the already tied bag bottom 9, and a blower 36 is provided further behind the heater.
The air flow directed toward the bag is heated when it passes through the heater 37, and the bag bottom 9 is exposed to hot air.

The bag bottom is exposed to hot air and heat-shrinks, and the residual air in that area is sent out toward the bag lower a.

The residual air sent towards the bag mouth is passed through double nozzles 23 and 24.
It is sucked in and discharged to the outside.

When the 360° opened bag lower a moves forward into the shirring and tying mechanism 18 by the advancement of the workbench 10, the inner nozzle 24 of the double nozzle protrudes from the tip of the outer nozzle 23 by the action of the air cylinder 33. Figures 3 and 6
(see figure), the outer peripheries of the inner and outer nozzles in their protruding state are covered by the bag lower a, and the two are connected.

When the covering by the bag lower a is completed, a vacuum pump (not shown) is activated by the command of the signal, and the air inside the bag starts to be discharged from the double nozzles 23 and 24, and the air inside the bag is removed almost instantly. be degassed.

If the bag bottom 9 is thermally shrunk by blowing hot air with the heater 37 and the blower 36 at the same time as the degassing of the bag or before that, the degree of vacuum inside the bag will be even higher. become.

Once the air inside the bag has been completely degassed and the bag opening is tied off,
Since the inner nozzle 24 is in the way, after the inner nozzle 24 is moved into the outer nozzle 23 via the rod 34 by the action of the air cylinder 33, the tips of the rods 26 and 27 are moved together as shown in FIG. , and clamp the bag opening with a fastener (not shown).

There is a slight lapse of time between the withdrawal of the inner nozzle 24 and the completion of bag tying, and the exhaust treatment during that time has been a blind spot in the past. Air was flowing backwards, and ligation was performed in that condition.

In the present invention, even after the inner nozzle 24 is withdrawn (FIG. 4), the outer nozzle 23 is still in close contact with the bag lower a and continues degassing, and ligation is performed in this continued state. Therefore, there is absolutely no risk of air backflow occurring, and the inside of the bag is completely deaerated and sealed, thus reliably preventing deterioration of the quality of the ham product caused by residual air inside the bag. Now you can.

Furthermore, in the present invention, the above effect can be achieved by using the double degassing nozzle 23.
and 24, the length of the bag lower a is not required, and the length of the scraps generated after cutting the bag opening is only 1 to 2 cm, which saves resources. As a result, the production cost of ham packaging products has been reduced, making it possible to provide consumers with inexpensive, high-quality ham packaging products.

[Brief explanation of drawings]

The drawings illustrate one specific embodiment of the invention. 1 is a plan view, FIG. 2 is a vertical right side view taken along line 2-2 in FIG. 1, and FIGS. 3 and 4 are front views taken along line 3-3 in FIG. , the operation of the present invention will be explained one by one. 5 is a vertical right side view taken along the line 5-5 in FIG. 3, and FIG. 6 is an enlarged vertical sectional front view of the main part of FIG. 7...Tube, 7a...Bag opening, 8.
...Ham, 9...Bag bottom, 10...
・Workbench, 11...Piston rod, 12...
...Guide, 13...Wall, 14...
・Slope, 15...Piston rod, 16...
...Air cylinder, 17...Guide roller,
18... shirring tying cutting mechanism (cutting part not shown), 19 and 20... machine frame, 21 and 2
2...Regulation plate, 23 and 24...Outer and inner concentric double nozzles, 25...Gap, 2
6 and 27...Folding and tying frame, 28 and 29...Elastic pad, 30...Machine frame, 31 and 35...Exhaust pipe, 32...
... Bracket, 33 ... Air cylinder, 34
... Piston rod, 37 ... Heater, 36 ... Blower.

Claims (1)

[Claims for Utility Model Registration] A bag made of a heat-shrinkable film filled with contents, a concentric double inner and outer deaeration nozzle provided at a position relative to the bag opening, and the inner nozzle is connected to the outer nozzle. a driving means for displacing between a position protruding from the tip and a position recessed into the outer nozzle; and means for connecting the bag opening and the nozzle to cover the outer periphery of the outer nozzle with the bag opening when the inner nozzle is protruded. , a bag opening shirring mechanism arranged to operate at the bag opening covering the protruding portion of the inner nozzle, and a bag opening tying mechanism arranged to operate at the position of the bag opening after the inner nozzle is immersed. It consists of a mechanism and a deaeration assisting means that blows hot air to the bottom part of the bag filled with contents to cause heat shrinkage in that part of the bag. A deaeration device at a bag opening, characterized in that the deaeration of the air is continued.