JPH0144402Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a vacuum sealing device for sucking out the air in a bag made of a flexible material containing enoki mushrooms, etc., and closing the mouth of the bag.

[Conventional technology]

As a vacuum sealing device for an enoki mushroom packaging machine, a shaft is rotatably mounted on the suction pipe, and the opening of the enoki mushroom packaging bag is pinched from the outside between the outer periphery of the shaft and the outer periphery of the tip of the shaft. A plurality of claw members that can be compressed freely are mounted on a shaft, and a pinion that engages with a rack that is provided on a base and extends perpendicularly to the shaft is fitted near the rear end of the shaft, The opening of the packaging bag containing the enoki mushrooms is held down from around it by a plurality of claw members, the air in the packaging bag is removed by a suction pipe, and the opening of the packaging bag is closed by twisting the opening several times. It is known that it was made (Japanese Patent Application Laid-Open No. 175555/1983).

[Problem that the invention attempts to solve]

However, the above-mentioned vacuum sealing device has a structure in which a plurality of claw members provided around the suction pipe grip the opening of the packaging bag and twist it to seal the bag, so the opening is small and the bottom is deep. In the case of a packaging bag, the opening can be sealed, but on the other hand, the opening is large and the bottom is shallow. The problem is that bags that can easily contain items such as mushrooms without damaging them cannot be used.

[Means for solving problems]

This invention solves the above conventional problems,
This is a vacuum sealing device for a packaging machine that uses a continuous bag for packaging, in which two sheet halves, front and back, are joined at a joint at a predetermined interval leaving an opening piece, and a plurality of single bags are arranged in a row. a guide member disposed close to the opening of the single bag between the opening pieces of the continuous packaging bag placed above; and an opening piece of the continuous packaging bag disposed on the side of the guide member; a transfer mechanism that presses the material against the side surface of the guide member and transfers the material along the guide member; A configuration comprising: a suction nozzle that sucks out air; an ejection nozzle that is disposed in parallel with the suction nozzle and that spouts air into the bag; and a seal mechanism that is disposed under the guide member and closes the mouth of the bag. This is what I did.

[Effect]

A continuous packaging bag containing an item to be packaged, such as enoki mushrooms, is placed in a single bag from the opening facing upward, and the opening piece is pressed against the guide member 5 by the transfer mechanism and transferred along the guide member, so that the opening is turned upward. Stop when it reaches the position of the guide member. When the continuous bag for packaging has stopped, air is jetted into the bag from the jet nozzle to inflate the bag at the insertion hole, and the suction nozzle is inserted into that part through the insertion hole, and the air is jetted from the jet nozzle. Stop and use the suction nozzle to suck out the air inside the bag to create a vacuum inside the bag. When the inside of the bag is evacuated in this way, the suction nozzle is pulled out from the bag and the opening of the bag is sealed by the sealing mechanism. When air is jetted into the bag from the jet nozzle, the guide member is located between the front and back opening pieces and close to the mouth of the bag, preventing the air from escaping upward. .
As a result, even if the two halves of the front and back sheets of a single bag stick to each other due to water droplets that fell when inserting the packaged product such as enoki mushrooms, the bag itself will not expand. will be ensured.

〔Example〕

The attached drawing shows an embodiment of the vacuum sealing device for a packaging machine according to the present invention, and reference numeral 1 in the drawing shows a continuous packaging bag made of a flexible sheet S of synthetic resin such as polyethylene. That is, this continuous packaging bag 1 consists of one long soft sheet S.
, form two sheet halves a, a and fold back at the center, sheet halves a, side edges b of a, and part c of b.
It is manufactured by joining two sheet halves a and a, front and back, at a predetermined interval from the folded part d to the vicinity of the side edge b, leaving the above-mentioned folded part d, at a joint part e.

In the above, two far apart joints e, e
Between the ends e' and e' on the side edge b side of the joint part e, the opening part 2 is defined, the folded part d is the bottom part, and the sheet part between the opening part 2 and the side edge b is opened. There are 3 pieces and 4 individual bags. As can be seen from the above explanation, the two opening pieces 3, 3 on the front and back sides are in a free state without being joined, and the opening pieces 3, 3 of the adjacent single bag 4 have a connecting part (the above-mentioned part c). ) are coupled as is. f is two adjacent joints e,
The cut line between the sheet halves a and a is cut between the sheet halves a and a by a cutter when the joint parts e and e are formed, that is, when the sheet halves a and a are welded together.

Further, reference numeral 5 denotes a guide member, which is attached to the base 6 by a bracket 7. An endless belt 10 is stretched between the driving wheel 8 and the driven wheel 9 on the side of the guide member 5.
Transfer mechanisms 12, 12 are provided in which the belt 10 is pressed toward the guide member 5 by a pressing ring 11.
The opening pieces 3, 3 are pressed against the guide member 5 and transferred along the guide member 5. In addition, in FIG. 5, the opening piece 3 of the guide member 5 portion is
Although the guide member 5 and the belt 10 are shown separated from each other, in reality, as described above, the belt 10 presses the guide member 5, and the driving wheels 8, 8 and the driven wheel are connected to each other. Opening pieces 3, 3 at parts 9, 9
is a belt 1 formed by driving wheels 8, 8 and driven wheels 9, 9.
They are pressed against each other by a pressing force of 0,10. Although the driving wheel 8 is disposed in the through hole 5a provided in the guide member 5, the driven wheel 9 may be provided in the through hole 5a.

An insertion hole 5b is formed at the downstream end (left side in FIGS. 1, 2, and 5) of the guide member 5, and an air supply source (not shown) is formed in the insertion hole 5b. one jet nozzle 1 connected by a pipe to
3 is arranged between two suction nozzles 14 which are connected to an air suction device (not shown) by a pipe, and a nozzle member 15 which is made up of these two suction nozzles 14 is inserted vertically freely. When the nozzle member 15 is inserted into the bag 4, the jet nozzle 13 blows air into the bag 4 at the insertion hole 5b.
This is to prevent the nozzle member 15 from getting caught on the bag unit 4 and damaging the bag unit 4 when the nozzle member 15 is inserted. The air inside the bag 4 is vacuumed by sucking out the air.
The nozzle member 15 is supported by a support member 17 that is moved up and down by a cylinder 16.

Further, a sealing mechanism 18 is provided below the guide member 5. This sealing mechanism 18 closes the opening 2 of the bag 4 by heat welding, and is composed of a heater 19, a pusher 20, and a receiving member 21, and when the bag 4 stops being transferred, the nozzle member 15 When the bag 4 is lowered, the opening 2 of the bag 4 is sandwiched between the pusher 20 and the receiving member 21, and the nozzle member 15 evacuates the inside of the bag 4 by the action of the suction nozzle 14 and rises.
is moved toward the receiving member 21 by a cylinder 22 to seal the opening 2 of the single bag 4. The heater 19 is mounted on a slider 23 that is moved by a cylinder 22 and an arm 26 that is attached to a pivot 24 and an extendable support member 25 so that its rotation angle can be adjusted. It is attached to a bell crank 29 that is rotated about a fulcrum. The receiving member 21 is made of rubber or a material having the same effect as rubber, and is adapted to move in the opposite direction of the pusher 20 in synchronization with the movement of the pusher 20. Further, a notch is formed in the pusher 20, and the nozzle member 15 moves up and down through the notch. 30 is a heat insulating member.

Next, the operation of the vacuum sealing device in the packaging machine according to the present invention configured as described above will be explained.

FIG. 1 shows a continuous packaging bag 1 in which a packaged product W such as enoki mushrooms is put into a single bag 4 from an upwardly facing opening 2, and is transferred to the left by the operation of a transfer mechanism 12 and the like. 2 is placed in the position of the guide member 5 and stopped. From this state, the nozzle member 15 is moved down inside the insertion hole 5b by the cylinder 16 as shown by the two-dot chain line in FIG. inserted into.
At this time, air is blown into the bag unit 4 from the jet nozzle 13 to partially or completely inflate the bag unit 4 near the insertion hole 5b, so that the nozzle member 15
will not touch the bag 4 and damage it.
Note that when air is blown into the bag unit 4 from the jet nozzle 13, the guide member 5 is connected to the two opening pieces 3, 3 on the front and back sides.
between the bag body 4 and close to the mouth part 2 of the bag body 4 to prevent air from escaping from the bag body 4.
Even if the two sheet halves a and a are attached to each other due to water droplets that fell when inserting the packaged product such as enoki mushrooms, the product will act directly on the attached parts. The expansion of the bag 4 is ensured by the force of the ejected air and the force of the air filling the bag 4.

When the nozzle member 15 is completely inserted into the bag unit 4, the jetting of air from the jetting nozzle 13 stops.
The pusher 20 and the receiving member 21 operate to release the single bag 4.
The mouth part 2 of the bag is clamped under the guide member 5, and the suction nozzle 14 works to suck out the air inside the bag 4, thereby evacuating the bag 4. When the inside of the bag unit 4 becomes vacuum, air suction stops and the nozzle member 15 is moved up inside the insertion hole 5b by the cylinder 16. Note that the nozzle member 15 can also be gradually raised as the vacuum progresses.

Immediately after the nozzle member 15 finishes rising, the heater 19 moves the mouth part 2 of the vacuum bag unit 4 to the receiving member 21.
After pressing it against and thermally welding that part, the pusher 20 and the receiving member 21 return to their original state.
As described above, the air inside the bag 4 is sucked out by the pusher 20 and the receiving member 21 at the mouth 2 of the bag 4.
Since this is done after making the seal airtight, there will be no wrinkles or other problems in the sealing area. When the sealing of the opening 2 of the single bag 4 is completed, the transfer mechanism 12 etc. are activated to transfer the continuous packaging bag 1 one pitch to the first
The bag is moved to the left in the figure, and the next single bag 4 is placed in the position of the guide member 5.

Thereafter, the above operations are repeated to evacuate the bag 4 and seal the opening 2 of the bag 4. After sealing the opening, if the product to be packaged W is enoki mushrooms or similar items, twist the end of one side of the bag 4 (usually the side where the sealing member 15 is inserted) to form a bundle. , the area may be resealed. Furthermore, in the above description, the ejection nozzle 13 and the suction nozzle 14 are integrated and configured to move up and down at the same time, but they can also be configured separately and moved up and down simultaneously or individually.
In addition, the number of jet nozzles 13 and suction nozzles 14,
And their arrangement relationship is not limited to that shown in the figure, but is arbitrary. The product to be packaged is not limited to enoki mushrooms or similar products, but can also be applied to packaging of lemons, etc., for example.

[Effect of idea]

As explained above, the vacuum sealing device in the packaging machine according to the present invention is capable of packaging a plurality of single bags in a row by joining two halves of the front and back sheets at the joints at predetermined intervals leaving an opening. A vacuum sealing device for a packaging machine using a continuous bag for packaging, the guide member being disposed close to the mouth of the single bag between the opening pieces of the continuous bag for packaging with the mouth facing upward; a transfer mechanism disposed on the side of the guide member for pressing the open piece of the continuous bag for packaging against the side surface of the guide member and transporting the continuous bag for packaging along the guide member; a suction nozzle that is freely inserted into a single bag of the continuous bag and sucks out the air inside the single bag; a blowout nozzle that is arranged in parallel with the suction nozzle and spouts air into the single bag; Since the structure is equipped with a sealing mechanism that closes the mouth of the bag itself, there is no possibility that the two halves of the front and back sheets that make up the bag will stick to each other due to water droplets, etc. Even if there is a problem, the force of the ejected air that acts directly on the attached part and the force of the air that fills the bag can be used to reliably separate it and remove the suction nozzle without damaging the bag. Can be inserted into a single bag. Therefore,
Even if the bag has a large mouth and a shallow bottom, the mouth can be easily and accurately evacuated and sealed.

[Brief explanation of the drawing]

This shows one embodiment of the present invention, in which Fig. 1 is a side view showing the relationship between the continuous packaging bag and the guide member, etc.;
The figure is a side view showing the relationship between the guide member and the belt, etc.; Figure 3 is a front view showing the relationship between the guide member, the belt, and the seal mechanism, etc.; Figure 4 is a side view showing the mounting structure of the heater and pusher; Figure 5 shows - of Figure 2.
FIG. DESCRIPTION OF SYMBOLS 1... Continuous bag for packaging, 2... Mouth part, 3... Opening piece, 4... Single bag, 5... Guide member, 12... Transfer mechanism, 13... Spray nozzle, 14... Suction nozzle, 18... Seal mechanism.

Claims (1)

[Scope of utility model registration request] In a packaging machine using a continuous packaging bag 1 in which a plurality of individual bags 4 are connected by joining two sheet halves a, a on the front and back sides at joints e, e at predetermined intervals leaving open pieces 3, 3. A guide member 5 that is a vacuum sealing device and is disposed close to the opening 2 of the single bag 4 between the opening pieces 3, 3 of the continuous packaging bag 1 with the opening 2 facing upward; a transfer mechanism 12 disposed on the side of the guide member 5 for pressing the opening pieces 3, 3 of the continuous packaging bag 1 against the side surface of the guide member 5 and transporting the same along the guide member 5; Insertion hole 5 provided
a suction nozzle 14 which is freely inserted into the single bag 4 of the continuous packaging bag 1 through b and sucks out the air inside the single bag 4; Spout nozzle 13
and a sealing mechanism 18 disposed below the guide member 5 for closing the opening 2 of the single bag 4. A vacuum sealing device for a packaging machine.