JPH0558987B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is characterized in that two vacuum chambers are installed at a constant distance, and a vacuum is applied to the packaged items contained in a bag in one vacuum chamber. While this is being carried out, the vacuum chamber at the other end is preparing to carry in the bags containing the items to be packaged, and while the vacuum chamber at the other end is applying vacuum to the items to be packaged in the bags, This invention relates to a vacuum packaging apparatus that alternately uses two vacuum chambers, such as one vacuum chamber, which performs preparation work for carrying in bags containing items to be packaged.

(Prior Art) Conventionally, Japanese Patent Application Laid-Open No. 57-86434 discloses a device that is equipped with two vacuum chambers and uses these vacuum chambers alternately to perform vacuum packaging efficiently. .

(Problems to be Solved by the Invention) However, in the above-mentioned apparatus, the bags containing the items to be packaged are carried into the vacuum chamber by a chain conveyor, so when the vacuum chamber is closed, the chain conveyor is It was shaped like it was sandwiched between the sealing materials of the vacuum chamber, which had the disadvantage of causing problems with airtightness at the part where the chain conveyor was sandwiched.

In view of the above-mentioned points, the present invention improves the means for transporting bags containing objects to be packaged into a vacuum chamber to improve airtightness.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a single lid block between two vacuum chambers, a first and a second vacuum chamber, which are installed so that their opening surfaces face each other. is reciprocated at regular intervals to alternately close the opening surfaces of both vacuum chambers, and in accordance with the closing action of the lid block, the air in each vacuum chamber is removed and the bag is removed within the vacuum chamber. In the apparatus which performs a sealing action on the edge of the opening, two sets of first and second clamps for supporting the bag are provided on both sides of the lid block, and each set of clamps is arranged inside the vacuum chamber. A vacuum cup at the tip of the swing arm sucks and supplies the bag to a clamper which is pulled out of the vacuum chamber on the opposite side when the bag is alternately confined in the vacuum chamber, and the mouth of the bag supported by the clamper outside the vacuum chamber is and means for transmitting movement to the clamp in order to open it.

(Function) When the lid block is displaced in the direction of the first vacuum chamber and the bag supply arm is supplying bags to the second clamp, the first vacuum chamber provided on the lid block
The clamp and the bag supported by the clamp are introduced into a first vacuum chamber and subjected to a vacuum action.
In this case, the lid block is in airtight contact with the opening surface of the first vacuum chamber, so that the first clamp provided on the lid block and the bag supported by the clamp are completely carried into the first vacuum chamber. Isolate from outside.

On the other hand, when the bag supported by the second clamp is opened and the packaged items are filled inside through the hopper, the lid block is displaced away from the first vacuum chamber and toward the second vacuum chamber. The clamp and the bag supported by the clamp are introduced into the second vacuum chamber. For this reason, vacuum packaged products are the first
It is carried out from the first vacuum chamber while being supported by the clamp, and then released from the first clamp. A new bag is supplied to the first clamp by the bag supply arm, and the bag is opened and filled with the object to be packaged. In this case, the second clamp and the bag supported by the clamp are completely isolated from the outside and subjected to a vacuum action within the second vacuum chamber.

In this way, the lid block is alternately displaced left and right along the guide rail, and bags are alternately supplied to the two clamps provided on both sides of the lid block, and these bags are alternately filled with items to be packaged. This allows vacuum-packed products to be formed one after another.

(Example) As shown in FIG. 1, two vacuum chambers 11 and 12 are installed on the upper surface of a machine stand 10 at a predetermined interval. These chambers 11 and 12 are both 6
It consists of a face piece, and one wall surface of the face piece has an opening 1.
3, 13, and the opening surfaces 13, 13 are arranged to face each other. As shown in FIG. 4, both of the chambers 11 and 12 have an actuator 14 fixed to their back surfaces, and a seal bar 17 at the other end of a rod 16 whose one end is fixed to a diaphragm 15 in the actuator. A seal stand 18 is installed on the opposite surface of the seal bar 17, and both chambers 11 and 12 are connected to a vacuum pump via a hose 19 and a switching valve.

Further, a guide rail 22 is supported laterally between two brackets 21, 21 provided on the front side of the machine base 10, and four wheels 2 are attached to the guide rail 22.
3, 23, 23, 23, the lid block 24 is connected to both vacuum chambers 11, 1.
It is supported so that it is located between the two. The lid block 24 has lid surfaces 25 and 26 on both sides thereof, respectively.
Clamps 31 and 32 for supporting the bag are provided on these sealing surfaces, respectively. Figures 2 and 3
These clamps are attached to lid block 2 as shown in the figure.
A horizontally long fixed side suction bar 27 with one end fixed to 4,
27, and movable suction bars 28, 28 provided on the front surface of each of the fixed suction bars, and the movable suction bars 28, 28 have support legs 29, 29 provided at right angles to the ends of the movable suction bars 28, 28. Lower end shaft 30, 30
are rotatably pivoted to the sealing surfaces 25, 26 on both sides of the lid block, and levers 34, 34 fixed to the shafts 30, 30 are extended outward through holes 35, 35 formed in the front face of the lid block. It's sticking out.

Further, as shown in FIGS. 1 and 2, a vacuum suction force is applied to the hollow portion inside each of the suction levers 27, 27, 28, 28 through tubes 36, 36, 37, 37. This vacuum suction force acts on the suction holes formed in the opposing surfaces of the suction bars, so that the bags are suctioned by the suction bars 27 and 28.

As shown in Fig. 3, on the top surface of the machine stand 10 there is
8 is installed, and a bag supply arm 41 supported via a pin 40 on the side of a tower 39 erected on the machine stand.
is the bag A stacked in the bag stacking box.
It is designed to be taken out by suction with a vacuum cup 42 at the tip. Groove cam 43 installed inside the machine base 10
The swinging rod 45 is swung around the pin 44 by the rotation of
As a result of operating the lever 47 with the connecting rod 46 and rotating the pin 40, the bag A is lifted as shown by the arrow 48 and inserted into the gap formed between the two suction bars 27 and 28, and the bag A is inserted into the gap formed between the two suction bars 27 and 28. 27,2
8 is adsorbed. Immediately after that, a pressing block 50 connected to the operating rod 49 is activated in front of the lid block.
pushes down the lever 34 against the force of the spring 51, so the movable suction bar 28 separates from the fixed suction bar 27, widening the opening of the bag supported by both suction blocks 27, 28. The hopper 52 descends thereto, and the packaged items are filled into the bag through the hopper. Thereafter, by releasing the pressing force of the pressing block 50 against the lever 34, the bag containing the article to be packaged is held between the suction blocks 27 and 28 by the reaction force of the spring 51. Small rubber protrusions are provided at spots on the opposing surfaces of both suction blocks 27 and 28 to prevent the bag opening from being completely closed when the bag is clamped. (Refer to Utility Model Application No. 60-92909) As shown in Fig. 1, two
An endless chain 54 is supported on two chain wheels 53, 53, and the chain 54 is connected to the lid block 24 via a metal fitting 55.
4 is made to reciprocate from side to side along the guide rail 22. Then, when the bag A supported by the second clamp 32 is filled with the object to be packaged, the lid block 24 is displaced to the direction of the second vacuum chamber 12, and the second clamp 32 and the bag A supported by the clamp are moved into the second vacuum chamber 12. Then, the opening surface 13 of the second vacuum chamber 12 is closed with the sealing surface 26 of the lid block, and the air inside the second vacuum chamber 12 is sucked. As the air in this vacuum chamber disappears, the suction power of the bag by the second clamp 32 also decreases.
The spring 51 shown in the figure is a pair of suction bars 27, 2.
8 maintains the force that holds the bag, thereby preventing the bag from falling. When the air inside the bag is removed, the actuator 14 moves the seal bar 17 to seal the bag opening. In this case, the first clamp 31 is located below the hopper 52, where the supply arm 41 transfers the new bag to the first clamp 31.
1, and after supporting the bag, the first clamp 31 opens the bag and receives filling of the packaged material from the hopper 52. Eventually, the lid block 24 is displaced in the direction of the first vacuum chamber 11 by the rotation of the chain 54, and the first clamp 31 and the bag supported by the clamp are carried into the first vacuum chamber 11, while the lid block 24 is moved into the second vacuum chamber 12. The vacuum packaged product supported by the second clamp 32 is carried out. Then, when the space between the two suction bars 27 and 28 of the second clamp is opened and the vacuum suction force is temporarily cut off, the vacuum-packed product falls downward due to its weight, and a new bag is then supplied. .

As described above, the lid block 24 is reciprocated alternately in the left and right directions in a constant cycle, and the first
By alternately supplying bags to the clamp 31 and the second clamp 32 and filling them with articles to be packaged,
Vacuum-packed products can be alternately formed using the vacuum chambers 11 and 12.

Note that both the first clamp 31 and the second clamp 32 supported the bag by vacuum suction force, and used the force of a spring to hold the bag after it was filled with the items to be packaged. As an example, the one shown in FIGS. 5 and 6 can be implemented. That is, groove-shaped rails 60 are fixed horizontally on both sides of the lid block 24, two sliders 61, 61 are provided on the rails 60, arms 62, 62 are protruded from the front of these sliders, and the tips of the arms are The movable claws 63, 63 are connected to the pins 64,
64, and the movable claws 63, 63
When the bag A is fed while applying a pressing force as shown by the arrows 66, 66, the movable claws 63, 63 clamp the bag A by the reaction force of the springs 65, 65. Further, an operating rod 69 is suspended from the intersection 68 of a pair of links 67, 67 whose ends are connected to both the sliders 61, 61,
When the ring 70 at the lower end of the operating rod is pulled in the direction of the arrow 71 against the tension spring 72, the pair of sliders 61, 61 are pulled together and the bag A is opened, and when the force of the arrow 71 is released, the spring 72 The bag opening is closed by the tensile force of .

(Effects) In the present invention, a lid block is provided between a first vacuum chamber and a second vacuum chamber, which are installed so that their opening faces face each other, and which is displaced alternately in the direction of both chambers, and the lid block is provided on both sides of the lid block. Clamps are provided on each of the sealing surfaces of the clamps, and bags are alternately supplied to these clamps, and while the bags are being supported by the clamps and filled with items to be packaged, the bags supported by other clamps are integrated with the clamps. Since it is carried into a vacuum chamber and subjected to vacuum action, unlike the conventional example explained at the beginning of the specification, the carrying conveyor is not caught between the sealing surfaces of the vacuum chamber and the sealing performance is improved. This has the effect of making vacuum packaging more efficient.

[Brief explanation of the drawing]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a view taken along the - line in the previous figure, FIG. 3 is a sectional view taken along the - line in FIG. 1, and FIG. 4 is a - line sectional view in FIG. 1.
A line sectional view, FIG. 5 is a front view of another embodiment, and FIG. 6 is a front view of another embodiment.
The figure is a plan view of the previous figure. DESCRIPTION OF SYMBOLS 11... First vacuum chamber, 12... Second vacuum chamber, 13... Opening surface, 14... Actuator, 17... Seal bar, 16... Seal stand, 19... Hose, 22... Guide rail,
24... Lid block, 25, 26... Sealing surface, 2
7... fixed side suction bar, 28... movable side suction bar, 31... first clamp, 32... second clamp, 38... bag loading box, 41... bag supply arm,
50...Press block, 52...Hopper.

Claims (1)

[Claims] 1. A single lid block is reciprocated at regular intervals between two vacuum chambers, the first and second vacuum chambers, which are installed so that the opening surfaces face each other, and the opening surfaces of both vacuum chambers are alternately moved. In the apparatus, the air in each vacuum chamber is removed in accordance with the sealing action of the lid block, and a sealing action is performed on the opening edge of the bag within the vacuum chamber. Two sets of first and second clamps for supporting the bag provided on both sides, and a clamper that is pulled out of the vacuum chamber by its reflective surface when each set of clamps is alternately confined within the vacuum chamber. A vacuum packaging device comprising a means for suctioning and supplying a bag with a vacuum cup at the tip of a swing arm, and a means for transmitting movement to the clamp in order to open the mouth of the bag supported by the clamper outside the vacuum chamber.