JPH0725370B2 - Vacuum packaging method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is suitable for vacuum-packing a highly fluid food product such as crushed fish meat,
TECHNICAL FIELD The present invention relates to a vacuum packaging method and apparatus for suspending and holding a bag in an airtight chamber and vacuum-packing it without circulating food from the bag to the outside.

(Prior Art) Conventionally, in the case of vacuum-packing a food having a large fluidity as described above, the bag is hung by a clamp in a vacuum pressure-resistant chamber, the bag is filled with the food, and then the bag is completely filled. It is processed with the clamps suspended. This allows vacuum packaging without the food flowing out of the bag.

However, since fluid foods have a relatively large specific gravity, if intermittent impact occurs due to intermittent rotation of the pressure chamber, the small clamp cannot support the bag inside the pressure chamber and the bag easily slips off from the clamp. There is a problem. However, if you try to increase the clamping force of the clamp with a spring that has a large spring load, the installation space for the spring will increase and the space volume of the pressure resistant chamber will increase, which reduces the vacuum suction capacity. Will be included.

(Problems to be Solved by the Invention) The present invention provides a vacuum packaging method for vacuum packaging a food having high fluidity while avoiding the above-mentioned problems. After a supporting rod is butted to the end of the suspension rod whose one end is fixed to, the bag suspended on the supporting rod is transferred to the suspension rod, and then, while being suspended on the suspension rod. After opening the mouth of the bag and filling the inside with food, in the closed space formed between the chamber and the lid material covering the opening surface,
The upper opening edge of the bag is clamped between the upper side of the chamber and the lid so that the food contained in the bag is placed, and the bag suspended between the chamber and the lid by the clamping force is used. While intermittently moving along with the chamber and the lid material along the endless track, first, while forming an intake hole in the bag between the upper side of the chamber and the lid material and the upper surface of the food, by the depressurizing action of the closed space. The bag is sealed between the air intake hole and food after the air in the bag is removed through the air intake hole, and as a vacuum packaging device, as described in claim 2. A means for intermittently moving a chamber having an opening surface toward the outside of the endless track and a lid member airtightly covering the opening surface of the chamber along the endless track, and the lid at a part of the endless track. Material chamber And a region where the lid member is separated from the chamber, the pair of support rods are butted to the ends of the pair of suspension rods whose one end is fixed to the upper surface of the chamber, and the bag suspended on the support rod is Means for transferring to a suspension rod, means for opening the mouth of the bag while being suspended on the suspension rod to fill food inside, and an upper part of the bag in an area where the chamber opening surface is covered with the lid material. Means for forming an intake hole in the bag, means for evacuating the inside of the bag through the intake hole, means for sealing the bag below the intake hole, and means for cutting the bag along the upper part of the sealing means And are arranged.

(Operation) According to the present invention, after the bag hung on the support rod is transferred to the suspension rod, the bag is filled with the food while being hung on the suspension rod, and then the upper opening of the bag is opened. While holding the edge between the upper side of the chamber and the lid and intermittently moving along the endless track, form an air intake hole in the bag and remove air in the bag through the air intake hole by depressurizing action, and then open the bag mouth. Seal. Further, according to the present invention, a pair of suspending rods is provided so as to further protrude from the upper portion of the tray-shaped chamber from the front opening surface of the chamber, and the suspension rods are arranged to suspend the bag outside the chamber. Is prepared.

On the other hand, the bag supply means supports a bag having two holes formed therein so as to abut with a pair of support rods. When the bag is supplied, the support rods are advanced to the tip of the suspension rod. The bag is slid from the support rod along with the butt, and is slid along the suspension rod.

When the bag is supported by the suspension rod, the bag is opened while being supported by the suspension rod, and food is filled from the opening. When the bag is filled with food, the lid member is brought into close contact with the opening surface of the chamber so as to sandwich the mouth of the bag, and the food-filled portion of the bag is airtightly covered with the chamber and the lid member. As a result, the mouth of the bag is sandwiched between the chamber and the lid material and closed, but the perforation knife forms a vent hole in the bag in the chamber,
Allows a vacuum to be applied into the bag from the vents.

When the vacuum value in the chamber rises, food with high fluidity will boil, but the ventilation holes formed in the bag have flow resistance, so a pressure difference will occur between the inside of the chamber and the inside of the bag. Since the bag is inflated, the liquid level contained in the food does not rise to the vent hole. After that, the lower side of the vent hole is sealed, and the bag is cut along the sealing portion with a cutting knife to separate the food-filled portion of the bag from the bag mouth.

(Example) The vacuum packaging device shown in FIG. 1 has six chambers (10).
(10) ... intermittently moves along a perfect circular orbit (11), and each chamber has a lid (13) (13) that can be opened and closed laterally around a hinge (12). Is provided.
Circular orbit (11)
The other end of the operating rod (16) engaging one end with the groove (15) of the groove cam (14) provided at the center of the link and the lever (17) provided on the lid member (13) are linked (18). Connected via
When the chamber (10) and the lid member (13) move in a circular orbit, the cam groove (15) pulls the rod (16) toward the center of the circular orbit or pushes it out in the same centrifugal direction. The lid material (13) is opened and closed.

The vacuum packaging device will be described in more detail with reference to FIG. 2. A cylindrical reversing shaft (22) is rotatably mounted on a bearing (21) erected on the upper surface of a machine base (20) via a ball bearing (23). A circular groove cam (14) fixed to the upper end of the reversing shaft (22) is supported on the upper surface of the bearing (21) through a thrust bearing (25), while inside the reversing shaft (22). Spindle (26) to ball bearing (27) (27)
And the cylindrical six arms (29) (29) are radially projected from the lower surface of the circular rotor (28) fixed to the upper end of the main shaft (26) in an umbrella shape. A tray-shaped chamber (10) is fixed to each tip of the chambers so that the opening surface (30) of the chamber faces outward. The lower end of the main shaft (26) is rotatably supported by a bearing (31) provided on the lower surface (20a) of the machine base, and the drive shaft (32) supported by the machine base (20) in parallel with the main shaft and the main shaft. (26)
By connecting and via the Genebus top (33), by transmitting the rotational power transmitted to the drive shaft (32) via the chain wheel (34) to the main shaft (26) via the Genebus top (33), The chamber (10) supported by the arm (29) moves in a circular orbit intermittently. Further, the shaft cam (3) is attached to the groove cam (35) fixed to the drive shaft (32).
Bell crank (37) that swings horizontally about 6)
Linking the tip of the bell crank (37) with the operation piece (38) protruding from the reversing shaft (22).
It is connected via 9). Therefore, when the groove cam (35) rotates integrally with the drive shaft (32), the bare crank (37) oscillates around the shaft rod (36), and this movement is performed via the link (39). The reversal axis (22) is reversed within a range of 60 degrees for transmission to the operation piece (38). As a result, the spindle (2
6) and the reversing shaft (22) rotate together by 60 degrees in the same direction, and while the main shaft (26) is stopped, the reversing axis (22) reverses by 60 degrees and returns to the original position. The exercise to do is repeated. Sleeve (41) fixed to the back of chamber (10)
A wheel (42) provided at one end of an actuating rod (16) slidably supported on the above is engaged with a groove (15) of a groove cam (14), and the other end of the operating rod (16) and a lid member (13). ) Is connected to the lever (17) via the link (18), the cover material (13) is moved by the movement of the groove cam (14) which is reversed when the main shaft (26) is stopped. It is opened from the chamber (10), and as shown in Fig. 1, the lid material is in a circular orbit,
It is designed to be opened within a range of about 180 degrees.

Further, as shown in FIG. 1, a pair of suspension rods (44) are attached to blocks (43) (43) provided on the upper surface of each chamber (10).
Means for fixing (44) and projecting the ends of these suspension rods from the opening surface (30) of the chamber, while supplying the bag to the chamber at the position where the lid material is most opened. (45) has been placed. As shown in FIG. 3, the means comprises a pillar material (48) standing on a table (47) slidably provided on a guide (46) formed by a dovetail groove, and the suspension member is suspended from the pillar material. The two support rods (49) (49) are slidably penetrated at the same intervals as the work rods (44) (44), and the support rods (4) are supported by the tension of the springs (50) (50).
9) (49) is pushed forward, and a large number of bags (100) (100) are hung so that two holes formed near the bag mouth are inserted into both support rods (49) (49). Support in the shape of. When the chamber (10) moving along the circular orbit stops there, the table (47) is advanced along the guide (46), and the two support rods (49) are resisted against the elasticity of the springs (50) (50). ) (49) 2 suspension rods (44)
Butt against the tip of (44). A vacuum cup (54) is provided at the tip of a swing arm (53) that is swingably supported via a pin (52) on a bracket (51) provided on a pillar material, and the swing arm (53) and air Cylinder (55) piston rod (5
6) is connected with. When the swing arm (53) is moved around the pin (52) by the air linder (55), the vacuum cup (54) adsorbs the bag (100) supported by the support rod (49) and the arrow (95). ), The bag is pulled out to the position of the virtual line (100a) and released. The support rod (49) is hollow inside, and compressed air is constantly blown into the support rod (49) through the tube (57), and the compressed air is formed on the lower surface near the tip of the support rod (49). The holes are blown out diagonally forward as shown by the arrow (99). Therefore, the virtual line (100
The bag pulled out to the position of a) is suspended by the chamber (44) by the pressure of the air blown out as shown by the arrow (99).
Be transferred to.

FIG. 6 is a front view of the chamber (10) supporting the bag (100). The bag (100) has two holes (9) formed near the bag mouth.
8) Two suspension rods (44) (44) are inserted into and supported by (98). When the chamber (10) thus supplied with the bag moves in a circular orbit by one pitch and stops, the device for opening the bag descends from above, as shown in FIGS. 4 and 5, and suckers (60 ) (61) adsorbs on both sides of the bag mouth. The piston rod (of the air cylinder (64) supporting the suction body (60) on one side on the vertically moving frame (62) and supporting the support body (63) of the suction cup (61) on the other side on the frame (62) ( 65) is fixed to the tip of the bag, and the air cylinder (64) separates the suction cup (61) on the other side from the suction cup (60) on the one side, so that the suction cups (100) are sucked by the suction cups on both suction cups (100). The mouth is opened wide along the suspension rods (44) (44), and then the nozzle (66) is inserted into the bag and the liquid food product (97) is filled into the bag. After the bag is filled with the food, the chamber further moves in a circular orbit by one pitch, and the lid member (13) is brought into close contact with the chamber (10) so as to sandwich the bag mouth here.

As shown in FIG. 6, a table (69) having a laterally narrow groove (68) formed in the chamber (10) and a downward V-shaped seal bar (70) are provided below the table (69). On the other hand, in the lid member (13), a plurality of piercing knives (73) attached to the piston rod (72) of the air cylinder (71) so as to face the groove (68) and the air cylinder (73 It is provided with a cutting blade (75) adapted to be moved by 74) and a V-shaped seal base (76). When the inside of the chamber (10) is closed by the lid material (13) as described above, A hole knife (73) is inserted into the groove (68) to form a plurality of suction holes (96) (96) in the bag (100).

As shown in FIG. 2, a circular movable plate (78) fixed to the upper center part of the rotor (28) and a hole (80) at the center part of the core rod (79) provided on the upper center part of the movable plate. The rotary valve (82) is formed by the fitted upper fixed plate (81),
The stationary platen (81) is connected to the machine base via the connecting member (83) and set in a fixed state. Therefore, when the main shaft (26) rotates intermittently, the lower movable plate (78) also rotates together with the main shaft (26) and moves so as to communicate with the cylindrical arms (29) (29). By connecting the six communication holes (84) formed in the board (78) to the vacuum hose (85) connected to the fixed board (81), a vacuum acts in the chamber (10), and as shown in FIG. As shown in the drawing, a vacuum is applied to the inside of the bag through the intake holes (96) formed in the bag. After that, the silver (70) in FIG. 6 is pushed out toward the seal base (76) by the air cylinder (86) on the back side of the chamber shown in FIG.
After heat-sealing (0), the cutting blade (75) is extruded into the V-shaped slit (88) formed between the base (69) and the seal bar (70), resulting in the seventh As shown in the figure, the product (89) in which food is vacuum-packed is separated from the bag mouth. Then, by opening the lid material from the chamber, the vacuum packaged product (89) falls out of the chamber, while the hanging bar (44) (44) is caught and remains in the bag mouth (100b).
Are eliminated in the direction of the arrow (91) by the air pressure ejected from the hole (90) formed in the lower surface of the suspension rod.

(Effect) In the method of the present invention, the upper opening edge of the bag containing the fluid having a relatively large specific gravity is clamped by the chamber and the lid member and is intermittently moved while being suspended, and the fluid is vacuum-packed during the movement. Since the entire upper edge of the bag is clamped and supported by the chamber and the lid member, the bag, which is relatively heavy, can be prevented from slipping off even if there is an impact of intermittent movement, and the area is small during vacuum suction. Since the pressure in the bag is prevented from rapidly decreasing due to the resistance of the intake hole, it is effective in preventing the liquid from boiling and preventing the liquid from being blown out.

The device of the present invention is provided with a pair of suspension rods on the outer side of the upper part of the chamber, and the suspension rods are inserted into the holes formed in the bag to support the bag in a suspended manner, and a punching knife is provided in the bag. To form an air intake hole, and a vacuum is applied from the air intake hole into the bag. Therefore, by matching a pair of support rods to the above-mentioned suspension rods and sliding the bag from the support rods toward the suspension rods, the bag can be supplied to the chamber with a probability close to 100%. Compared with the means for supporting the bag, there is an effect that the catch error of the bag can be reduced.

Also, since the suspending rod supports the bag so that it sticks out, the bag does not separate from the suspending rod unless the bag is broken by the weight impact of the food to be filled. With this, the bag is sandwiched, and there is an effect that the filling speed of the food can be increased and the efficiency can be improved as compared with the case where the bag is easily slipped off.

Further, the air in the bag is removed from the air holes formed in the bag, and the bag expands due to the flow resistance of the air holes to lower the liquid level, so that the boiling liquid of the food is unlikely to overflow to the outside of the bag.

Furthermore, in a chamber that covers the entire bag, the internal volume of the chamber is that large and the vacuum efficiency is poor, but since the bag mouth with the hole in the bag is pushed out of the chamber and vacuumed, the chamber volume can be made smaller by that much. There is an effect that the vacuum efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention, FIG. 2 is a partial sectional view of the previous figure, FIG. 3 is an explanatory view of an apparatus for supplying a bag to a chamber, and FIG. Is a cross-sectional side view of a bag filled with food, FIG. 5 is a plan view of the previous figure, FIG. 6 is a plan view of a chamber in which a lid material is shown in section, and FIG. 7 is an explanatory view of a packaged product. is there. (10) ... Chamber, (11) ... Circular orbit, (13) ... Lid,
(26)… spindle, (30)… opening surface, (44)… suspension bar,
(45) ... bag supply means, (49) ... support rod, (70) ... seal bar, (73) ... drilling knife, (75) ... cutting blade, (76) ...
Seal stand, (100) ... bag,

Claims (4)

[Claims] 1. A support rod is abutted against the end of a suspension rod whose one end is fixed to the upper surface of a chamber, and the bag hung on the support rod is transferred to the suspension rod, and then the suspension rod is suspended. After the mouth of the bag is opened while being hung on the rod and the inside of the bag is filled with the food, the food contained in the bag is placed in the closed space formed between the chamber and the lid member covering the opening surface. As described above, the upper opening edge of the bag is clamped between the upper side of the chamber and the lid member, and the bag suspended between the chamber and the lid member by the clamping force is integrated with the chamber and the lid member. While intermittently moving along the endless track,
First, an air intake hole is formed in the bag between the upper side of the chamber and the lid and the upper surface of the food, and the air inside the bag is removed through the air intake hole by the depressurizing action of the closed space. A vacuum packaging method in which the bag is sealed with food. 2. A means for intermittently moving a chamber having an opening surface toward the outside of the endless track and a lid member airtightly covering the opening surface of the chamber along the endless track, and one of the endless track. Means for separating the lid member from the chamber at the section, and in a region where the cover member is separated from the chamber, a pair of supporting rods are butted to the tips of a pair of suspension rods whose one end is fixed to the upper surface of the chamber. Means for transferring the bag suspended on the suspension rod to the suspension rod, means for opening the mouth of the bag while being suspended on the suspension rod to fill food inside, and a lid material for the chamber opening surface Means for forming an air intake hole in the upper part of the bag in the area covered by, a means for evacuating the inside of the bag through the air intake hole, a means for sealing the bag below the air intake hole, and an upper part of the sealing means. Along Vacuum packaging apparatus comprising a means for cutting the bag. 3. The vacuum packaging device according to claim 2, wherein the bag is transferred from the support rod to the suspension rod by air pressure blown from the inside of the support rod toward the surface. 4. The air pressure blown from the inside of the suspending rod toward the surface is used to remove the scraps of the bag mouth that are cut by the cutting means and remain on the suspending rod.
Vacuum packaging device according to.