JPS5912531B2 - Deaeration packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention sequentially removes the air inside a large number of bags conveyed by a belt conveyor, starting with the first bag, and places the articles contained in each bag in a negative pressure environment. 5. This relates to equipment for packaging.

The present invention is for packaging various items in bags as described above under a negative pressure environment. It is suitable for packaging products with high efficiency, and in some cases, it can also be used for the preparation process before vacuum packaging these moist products, and it can also be used especially for degassing packaging of high-temperature viscous products. can. If the above-mentioned items containing a lot of water are placed in a bag and the surrounding air pressure is rapidly reduced, there is a drawback that the items may jump out of the bag due to the expansion of the gas contained in the water.

Therefore, in order to vacuum package this kind of moisture-rich product in a conventionally sealed box, the pressure inside the box must be reduced over a long period of time. It was inefficient. In particular, high-temperature foods such as freshly boiled red bean paste generate water vapor, making it impossible to vacuum package them. Therefore, the packaged items can only be packaged after they have been cooled once. Therefore, foods packaged in cold packaging must be sterilized for long-term storage. In view of the above points, the present invention has a belt conveyor installed at the bottom of a chamber which is connected to a vacuum pump at one end and has a continuous long and narrow hole in the lower surface, and each bag is moved so that the opening of the bag passes through the hole. is conveyed by the Peltron 30 bear to slowly and efficiently reduce the pressure inside the bag.

Embodiments of the present invention will be described below based on the drawings.

In the embodiment shown in FIG. 1, a chamber 1 is provided in the upper part, and a belt conveyor 2 is provided in the lower part. The 35 belt conveyor 2 has an endless belt with its front and rear ends connected to a rotor 3,
4, and bags A, A, placed on top of it at equal intervals.
Although the belt conveyor 2 has a function of continuously conveying from right to left in the drawing, even if the belt conveyor 2 is configured with an endless chain, the final result of the present invention will not be satisfied. There is no major difference in purpose. Further, as shown in FIG. 2, guide plates 5, 5 are installed along both sides of the upper part of the conveyor 2 to stabilize the trajectory on which the bags A are transported. On the other hand, the chamber 1 is constituted by a long and narrow box along the conveyor 2, and the two pipes 6, 6 and the vacuum pump 7 provided on the ceiling are connected to the line 8.
are connected via. It should be noted that even if the vacuum pump 7 is not technically defined as a pump, it will not make much of a difference to the purpose of the present invention if it is an air machine with a suction function, such as a fan. Further, the chamber 1 has an elongated hole 9 formed in its lower surface as shown in FIG. The width of the hole 9 is, for example, 1c1! Around t, the width of the chamber 1 is narrower than the width of the chamber 1, and road wall elements 10, 10 are hung downward from the edges of both sides of the gap hole 9, respectively. Further, a current plate 11 is disposed inside the chamber 1 to adjust the pressure inside the chamber. Furthermore, a pair of endless rotating belts 13a, 13a are installed along the lower part of the chamber 1, supported by a plurality of rotors 14, 15, respectively.

As shown in FIG. 1, the shafts 16 of the rotors 14, 14 on one side supporting the rotating strips 13a, 13a and the shaft 17 of the rotor 4 of the belt conveyor 3 are connected via a bevel gear 18, The two types of rotating elements 2, 13a and 13a are made to rotate at the same speed. Further, as shown in FIG. 3, clamping pieces 19, 19, . . . are provided protruding from the opposing surfaces of the rotating strips 13a, 13a at regular intervals, respectively.
The holding piece 19 is made of a material such as rubber or soft synthetic resin that has a relatively large coefficient of friction. Furthermore, as shown in FIG. 4, among the rotors 14, 14 that support and drive the rotating strips 13a, 13a, the one on the left side of the figure is fixed via a shaft 16 and a key 20. However, the one on the right side is supported in a freely rotating manner with respect to the shaft 16a, and is equipped with a misalignment device 21.
A pin 23 protruding from the shaft 16a is arranged in an arc-shaped groove 22 formed in the rotor 14 along the circumference of the shaft 16a, and a frib 2 protruding from the side surface of the shaft 16a.
4 and a pin 25 on the upper surface of the rotor 14 to buffer the play of the rotor 14 with respect to the shaft 16a. The wheel 28 and a large-diameter wheel 29 fixed to the drive shaft 16a are connected via a chain 30, and a star-shaped rotary hammer 31 is fixed to the driven shaft 27. An impact element 32 made of a pin is provided.

Furthermore, a pair of heating rotors 33, 33 are installed at the outlet of the chamber 1. The present invention is constructed as described above, and its operation will be explained below. In FIG. 4, the left and right rotors 14, 14 rotate in symmetrical directions.

That is, in the drawing, the rotor 14 on the left side rotates counterclockwise, while the rotor 14 on the right side rotates clockwise to drive the strips 13a, 13a in synchronization with the belt conveyor 2. Therefore, at the right end in FIG.
When the bag A is placed on the belt conveyor 2 so as to be narrowed between the holding pieces 19, 19, the bag A begins to be conveyed to the left in the drawing. 10, 10 from one end to the other.
On the other hand, the operation of the vacuum pump 7 causes air to be sucked into the gap 9 on the lower surface of the chamber 1, and a bench lily effect is exerted between the left and right road wall elements 10, 10. In other words, the air flow is fastest and the pressure is lowest in this area. Therefore, the air inside bag A is removed from the opening. However, as the pressure inside the bag A is reduced, the opening of the bag tends to be flattened and closed due to the pressure difference between the outside and inside of the bag A. Particularly moist items add moisture to the inner surface of bag A, making the opening of the bag more likely to adhere. This reduces the bag's exhaust efficiency. The misalignment device 21 then slides the mouth of the bag to facilitate evacuation. That is, in FIG. 4, the left rotor 14 receives the driving force of the shaft 16 through the key 20, while the right rotor 14 receives the driving force from the shaft 16 through the pin 23.
Normally, the left and right clamping pieces 19, 1
9 move at the same speed. However, the right rotor 1
The small-diameter wheel 28 provided at the eccentric portion of the small-diameter wheel 28 receives rotational power from the chain 30 and freely rotates around the driven shaft 27, and further, the rotational power of the small-diameter wheel 28 is driven in the opposite direction via, for example, a planetary wheel. When the transmission is transmitted to the shaft 27, the driven shaft 27 has a diameter ratio of the two wheels 29 and 28 that is equal to the shaft 1.
Since the hammer 31 is rotated counterclockwise at a higher speed than the rotary hammer 6a, the rotary hammer 31 strikes the impact element 32 four times during one rotation. Since the rotor 14 on the right side is supported in an idling manner with respect to the shaft 16a, it is accelerated by receiving the impact of the rotating hammer 31 as described above, and when there is no impact from the rotating hammer 31, it stops or is pulled. It tries to return counterclockwise by the spring 26. Therefore, in the drawing, the right holding piece 19 moves with irregular movements. To explain the above-mentioned movement based on FIG. 3, the left and right clamping pieces 19, 19 mutually exhibit contradictory movements as shown by the arrows, and also exhibit symmetrical movements that are completely opposite to the arrows. Due to this action, the opening of the bag A slides, and this sliding creates a gap, thereby eliminating the air within the bag. The opening of the bag A at the outlet of the chamber 11 is sealed by a pair of heating rotors 33, 33. As described above, the present invention operates a pair of rotating belt members intermittently in the same direction using a non-adjustable device, and slides the opening of the bag against the road wall on the lower surface of one of the chambers. The air inside the bag is allowed to pass between the elements, and the air inside the bag is sequentially removed by the bench lily effect that occurs between the road wall elements.

Compared to packaging under vacuum inside a sealed box, it is true that it takes time to deair each bag, but it is possible to continuously transport the bags on a belt conveyor. Since it can be degassed, the deaeration efficiency is actually improved. Moreover, there is no rapid depressurization inside the bag, so no parts fly out. Because the article is placed in a negative pressure environment for a relatively long time due to the long chamber, air within the viscous material can be gradually eliminated.
Therefore, for example, vacuum packaging can be made more efficient by using this apparatus as the primary process and using a vacuum box in the secondary process. In addition, freshly boiled food can be degassed without popping out of the bag, so even if water vapor remains inside the bag, the heat sterilizes it, allowing long-term storage and eliminating the need for sterilizing heat treatment. be.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a view taken from the - line in the previous figure, Fig. 3 is an enlarged view taken from the - line in the previous figure, and Fig. 4 is a partial explanation of the operation. It is a diagram. 1...Chamber 1, 2...Belt conveyor, 7...Vacuum pump, 9...Gap, 10...Road wall element , 13... band material,
19... Clipping piece, 21... Misalignment device, 22-... Groove, 26... Tension spring,
27... Driven shaft, 31... Rotating hammer 32... Impact element, 33... Heating rotor, A... Bag.

Claims (1)

[Claims] 1. A long and narrow chamber, which is basically sealed, is installed along the top of the belt conveyor on which bags containing goods are placed and transported, and on the bottom surface of the chamber,
Opening an elongated hole with a width narrower than the width of the chamber,
Road wall elements of a predetermined length are vertically disposed from the hole edges on both sides of the gap, and a port formed at a relatively upper portion of the chamber is connected to a vacuum pump via a line. A pair of endless rotating belts are installed along the lower part of the gap on the lower surface so as to rotate synchronously with the belt conveyor in symmetrical directions (relationship between clockwise and counterclockwise directions), and both of these rotating belts are Clamping pieces each having a surface with a relatively large coefficient of friction for partially clamping the opening of the bag are attached to the outer surface of the material at equal intervals, and further, the rotating strip material rotates in the symmetrical direction. A rotor that supports an end is engaged with a shaft that is located at the center of the rotor and drives the rotor so that it can freely rotate by a predetermined angle, and a large number of pins are provided at equal intervals around the periphery of the rotor, and A degassing packaging device comprising a rotating hammer for intermittently hitting the pin on a shaft that rotates at a higher speed than the shaft that drives the rotor.