JPS5926528B2 - vacuum packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for easily vacuum packaging foods and the like as needed.

Recently, in meat shops, etc., in addition to packaged meat that is vacuum-packed continuously by passing it through a vacuum chamber during the manufacturing process, raw meat that has not been packaged is vacuum-packed at the store each time according to a customer's request. It is being packaged and sold.
In this case, vacuum packaging simply involves storing raw meat, etc. in a synthetic resin bag, expelling the air inside, and heat-sealing the opening of the bag, so there may be slight defects in the operation of the equipment. However, there is a risk that the preservability of the enclosed food will deteriorate rapidly. As shown in FIG. 8, this type of vacuum packaging apparatus that has been used in the past has a clamping rod 6 on the top surface of the main body that clamps the tip of the air suction tube 5' from above and below, with one movable and the other fixed. ',6'
In addition, heat seal plates T' and 7' are provided above and below the air suction pipe 5', respectively, and are located in front of the air suction pipe 5'.
1) Fit the opening of the bag a' containing the desired food into the tip of the air suction tube 5' and place it on the main body (Fig. 8A).
), (2) Next, use the upper and lower clamping rods 6' and 6' to clamp and hold the mouth edge of the bag a' together with the air suction tube 5' from above and below (Fig. 8B), and in the state of (3) After activating the vacuum pump connected to the base end of the air suction pipe 5'' to suction the air inside the bag a', the rim of the bag a'' is thermally bonded by compressing it with heat sealing plates 7'' and 7''. (Fig. 8C), (4) The heat seal plates 7'', 7'' and the clamping rods 6'', 6'' are opened to take out the desired bag. However, with this structure, the vacuum pump does not operate. When the air inside the bag starts to be sucked, the inner surface of the bag near the suction port of the air suction tube is strongly attracted, and this area overlaps and blocks communication with the inner part of the bag, causing the bag to collapse. While the internal air remains deep inside the body, the vacuum pump's negative pressure rapidly increases and the suction operation ends, and at the same time, the deformed part of the bag that closes the suction port is thermally bonded to this part. Fine wrinkles were likely to occur, and in addition to insufficient suction, there was a risk that sealing would be incomplete.

In order to eliminate this drawback, for example, the air suction tube was made into a double pipe or bendable, and was advanced a considerable length into the bag to remove the air inside the bag, and then retreated to align the tip with the clamping rod. Later, a device was developed that operated a heat-sealing plate, but it was difficult to make the air suction tube, which is a flat tube, into a double structure or a bent structure, and to make it slide in conjunction with each part. It is complicated, has few failures, and is disadvantageous in practical terms.

On the other hand, the present invention has a very simple structure and eliminates the above-mentioned drawbacks.Explaining an embodiment of the present invention with reference to the drawings, as shown in Fig. 1, the entire structure is made in one box shape, A window hole 3 is provided in the center of the front lid 2 that covers the front surface of the main body 1 for inserting the rim of the bag for the desired object to be packaged. 4 is provided protrudingly so that its height can be freely adjusted.

Figure 2 is a front view with the front cover 2 removed, and shows the main body 1.
An air suction tube 5 is provided in the center of the front surface with its tip protruding forward for a required length, and the top and bottom of the air suction tube 5 are horizontal to each other.
A pair of clamping rods 6, 6 and heat seal plates 7, 7 are provided under the soil, which are raised and lowered while maintaining the soil. The air suction tube 5 has a proximal end connected to a vacuum pump in the main body 1, and a distal end opening formed in a flange 8 of a required size that expands outward.

As is clear from FIG. 3, the upper and lower clamping rods 6 and 6 have a rectangular frame shape in which front and rear rods 9 and 10, each of which has a press-contact portion made of soft rubber, are connected at both ends and have a gap 11 in the middle. Furthermore, notches 12 are provided at the center portions of the corresponding upper and lower surfaces of the front rods 9, 9 over a required width.

As is clear from FIG. 4, the upper and lower heat seal plates 7, 7 are each
It is shaped like a book stick and has a heating wire built into it.
During heat sealing, each of the front and rear rods 9, 10. of the clamping rods 6, 6.
It will be in a state where it is clamped between 9 and 10.

These upper and lower clamping rods 6, 6 and upper and lower heat-sealing plates 7, 7 each form a set of upper and lower parts and move from above and below toward the mouth edge of the bag, and after the operation is completed, they are separated from each other vertically. ing.

In FIG. 2, reference numeral 13 is a motor that moves up and down the upper and lower clamping rods 6, 6, and one end of a wire 15 is wound around both ends of a rotating shaft 14 that is connected to the motor 13 via a worm gear. These wires 15, 15 are bent downward via a pulley 16, and the other end is connected to the main body via a spring 17. As shown in the figure, both ends of the upper and lower clamping rods 6, 6 are supported by wires 15, 15, and when the motor 13 is rotated forward and backward, the upper and lower clamping rods 6, 6 move up and down at a constant speed, so that they approach or separate from each other. It's getting old. Similarly, 18 is a motor that moves up and down the upper and lower heat seal plates 7, 7, which rotates the rotating shaft 19 via a worm gear, and connects the upper and lower heat seal plates 7, 7 via wires 20... Go up and down 7. 21 is a pulley, and 22 is a spring.

This invention has the above configuration and operates in the following order.

That is, as shown in FIG. 5, (1) a synthetic resin bag a containing the required food or other packaged items is placed on the mounting table 4, and the tip of the air suction tube 5 is inserted into the bag a. Bring it inside.

(Figure 5A). (2) Rotate the motor 13 to move the upper and lower locking rods 6, 6, and each rear rod 10,
At 10, it is compressed from above and below together with the air suction tube 5 and held in place, and the vacuum pump is activated to suck the air inside the bag body a (FIG. 5B). (3) Rotate the motor 18 to move the upper and lower heat-sealing plates 7, 7 to thermally bond the mouth edge of the bag a (FIG. 5C). (4) After completing the sealing, the vacuum pump is stopped, the motors 13 and 18 are rotated in the opposite direction to separate the clamping rods 6 and 6 and the heat seal plates 7 and 7 from the bag body a, and the mounting table 4 The bag body a is taken out from the bag. In this case, these operations are performed in conjunction with each other by pressing a foot switch or the like once, as in the conventional device, and the electric heat of the heat seal plates 7, 7 is A timer that can be adjusted according to the thickness of the material of body a automatically turns off after a certain period of time.

In FIG. 1, reference numerals 23 and 23 indicate respective switches, and 24 indicates a timer. With the above configuration, this invention has the structure shown in FIGS.
As is clear from the above, since the tip end of the air suction tube 5 expands outward as a collar edge 8, the inner surface of the bag body a does not touch each other even while the vacuum pump is operating. There is no risk of polymerization, and since the bag body a is held under pressure by the front rods 9, 9 of the upper and lower clamping rods 6, 6 except for the central portion, the inside of the bag body is formed into a cylindrical shape surrounding the brim edge 8. Even when the heat-sealing plates 7, 7 are held and moved up and down to compress the bag, it does not deform, and therefore there is no risk of fine wrinkles or the like.

Note that this collar edge 8 may be prepared in several sizes and replaced as appropriate.

As described above, the present invention has an extremely simple structure and can perform efficient sealing, and since the height-adjustable mounting table 4 is provided, air can be easily sucked from the mouth edge of the bag. The center of the tip of the tube 5 can be correctly aligned, and work efficiency can be increased.

There are various height adjustment structures for the mounting table 4, but for example, as shown in FIG.
It can be easily adjusted by attaching it to the opening/closing leg 26 that moves back and forth.

The apparatus of the present invention described above can further include a mechanism for tensioning the mouth edge of the supplied bag body from side to side.

That is, when the bag a is set with the mouth brim 8 of the air suction tube 5 facing inside its mouth, depending on the size of the bag, the thickness of the material, etc. Since it is expanded by the brim edge 8, both the left and right edges are pulled towards the center, resulting in an irregular shape, and if this is pressed as is, the bonding may be biased to one side.

FIG. 7 shows an example of a mechanism for preventing this by pulling the mouth edge of the bag to the left and right at the same time as setting the bag a to make it symmetrical from left to right.

In the figure, reference numerals 27, 27 are needle-shaped left and right handles, which are elongated holes 28 formed in the front plate of the main body 1. It protrudes forward from the horizontally elongated holes 28, 28 and can be moved left and right using the horizontally elongated holes 28, 28 as a guide. These left and right handles 27, 27 are made of one wire 29
One end of the wire 29 is fixed in place on the main body via a weak spring 30.
The other end of the wire is previously wound around a winding drum attached to the rotating shaft 14. 31...... are each pulley.

The wire 29, pulley 31, spring 30, etc. are actually attached to the back surface of the front plate of the main body 1. With this configuration, after setting the bag body a, when the rotary shaft 14 is rotated by the motor 13 as described above and the upper and lower clamping rods 6 are moved toward the center, the upper and lower clamping rods 6, 6 are moved toward the center against the spring 30 in advance. As a result of the wire 29 being pulled out from the winding drum by the rotation of the rotating shaft 14, the left and right handles 27, 27, which have been drawn toward each other, are expanded laterally by the spring 30, and the rim of the bag body is expanded laterally. I can do it. It goes without saying that the lengths of the left and right handles 27, 27, that is, the degree of forward protrusion, are approximately the same as those of the air suction tube 5. After completing the packaging and removing the bag a, the left and right handles 27 are opened by rotating the rotating shaft 14.
27 is again located close to the center and can always be located within the bag to be packed next.

[Brief explanation of drawings]

Figure 1 is a slope view as seen from the front, Figure 2 is a front view with the front cover removed, Figure 3 is a slope view of the upper and lower clamping rods, and Figure 4 is a slope view showing one of the heat seal plates. , FIG. 5 is an explanatory sectional view showing the operating sequence, FIG. 6 is a side view showing an example of the mounting table,
Figure 7 is an explanatory front view of the mechanism that tensions the opening of the bag;
The figure is an explanatory view of the operation of an example of a conventional device. Symbols in the figure: 1 is the main body, 2 is the front cover, 4 is the mounting table, 5 is the air suction tube, 6 is the clamping rod, 7 is the heat seal plate, 8 is the collar edge,
9 is the front rod, 10 is the rear rod, 11 is the gap, 12 is the notch, 1
3, 18 are motors, 14, 19 are rotating shafts, 15, 20
, 29 is a wire, 27 is a left and right puller, 30 is a spring, and a is a bag body.

Claims (1)

[Scope of Claims] 1. A mounting table for horizontally holding a bag containing an object to be packaged is installed in the front part of the main body, the height of which can be adjusted freely, and a leading end An air suction tube protrudes forward, and a pair of upper and lower clamps are arranged vertically around the tip of this air suction tube, and move up and down mutually while maintaining the horizontal position, and hold the mouth edge of the bag from above and below. A pair of upper and lower heat-sealing plates are installed on the stopper, which moves up and down while keeping the same horizontal position, and heat-bonds the rim of the bag body from above and below. Formed on the edge of the brim,
The locking rod is made of a rectangular frame with upper and lower openings, consisting of front and rear rods connected at both ends at a required interval, and a heat-sealing plate is moved up and down between the front and rear rods. A vacuum packaging device characterized in that opposing center portions are cut out over a required width so that when clamping, only the rear levers press the rear part of the brim edge of the tip of the air suction tube. 2 At the front of the main body, a mounting table for horizontally holding the bag containing the items to be packaged is installed, the height of which can be adjusted. The suction tube, which is arranged vertically around the tip of the air suction tube, moves up and down mutually while keeping it horizontal, and holds the mouth edge of the bag from above and below. A pair of upper and lower heat-sealing plates that move up and down while holding the bag and heat-bond the mouth edge of the bag body from above and below are provided, and the air suction tube has a tip end edge that is formed into a brim of a required size that expands outward. death,
The locking rod is made of a rectangular frame with upper and lower openings, consisting of front and rear rods connected at both ends at a required interval, and a heat-sealing plate is moved up and down between the front and rear rods. When clamping, each rear lever is configured to clamp the rear of the brim edge of the air suction tube tip, and furthermore, there are bags positioned on the left and right sides of the air suction tube sandwiching the brim edge of the air suction tube in front of the main body. It is equipped with needle-shaped left and right handles that are inserted into the inner rim of the mouth and constantly pushed outward to the left and right, and these left and right handles are linked to the clamping rods, so that when the upper and lower clamping rods are separated, they move toward the brim edge. A vacuum packaging device characterized by being configured so that they are close to each other.