JPH092428A - Degassing and sealing equipment for automatic packaging machines - Google Patents

Abstract

(57) [Abstract] [Purpose] A spring is used for degassing by pressing the opening of the bag 1 which holds the filling and is gripped by the gripping claws on both sides with the pair of degassing rods 5a and 5b from the side surface. 7, gripping arms 3a, 3
It clamps a proper place without being obstructed by b etc., suppresses the shaking of the bag, and prevents the liquid from blowing and insufficient deaeration. [Structure] The rotation fulcrum of the outer deaeration rod 5b is a fulcrum O ₂ positioned substantially directly below the bag 1, and the rotation fulcrum of the inner deaeration rod 5a is a fulcrum O ₁ positioned slightly outside thereof. The outer deaeration rod 5b contacts the opening side surface of the bag 1 from a substantially horizontal direction,
The inner deaeration rod 5a presses the side surface of the opening from a diagonally downward direction at a timing slightly later than the operation of the outer deaeration rod 5b. The height position of each deaeration rod 5a, 5b is adjustable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic packaging machine,
The present invention relates to an improvement of a degassing / sealing device for sealing a bag mouth after degassing a bag containing a filling.

[0002]

2. Description of the Related Art While grasping both side edges of a supplied bag with a pair of grasping claws and intermittently rotating the table as it rotates,
With an intermittent rotary table type automatic packaging machine that fills and wraps food etc. in the bag, the bag mouth is heat-sealed after filling the food etc., but at that time, residual air in the bag is removed to prevent corrosion and oxidation. So that the deaeration operation is performed.

FIG. 4 shows a conventional deaerator.
Grasping arms 3a and 3b of a pair of grasping claws 2a and 2b that grasp both side edges of the bag 1 (only one pair is shown for explanation)
As shown by the arrow in FIG. 4 (a), a little inward to loosen the bag mouth tension, and open the bag mouth by S (see FIG.
(B)) Drive the gears 4a and 4b meshing with each other to rotate the pair of deaeration rods 5a and 5b with the support shafts of the gears 4a and 4b as the rotation fulcrum, and open the opening of the bag 1 from both sides. The bag 1 is squeezed to release the air in the bag 1, and then the gripping arm 3
A and 3b are spread outwardly to form a bag mouth, and the bag mouth is sandwiched by a pair of hot plates 6a and 6b to be heat-sealed (FIG. 4 (c)).

In this device, gears 4a meshing with each other,
4b is driven to move the pair of deaeration rods 5a, 5b symmetrically so as to pinch the opening of the bag 1 from both side surfaces thereof at the same time. Is almost directly below the bag 1, so that the deaeration rods 5a and 5b move in a horizontal movement relative to the bag 1 in the vicinity of the bag 1. In FIG. 4, 7 is a spring for constantly urging the gripping arms 3a, 3b inward, and T.
Is an intermittent rotary table.

[0005]

By the way, when the pinching position of the opening by the deaeration rods 5a, 5b is not appropriate,
For example, when the clamping position is too low compared to the position of the filling (the filling is filled above the clamping position), the filling liquid may be blown out from the bag mouth together with air, or conversely If the pinching point is too high compared to the position of, the air bleeding may be insufficient. However, in the above-described conventional device, the depressurizing rods 5a,
The height of b is adjusted, and for example, the clamping position is set to the pair of gripping claws 2.
Even if an attempt is made to set a position very close to a or 2b or a position between the gripping claws 2a and 2b, the inner deaeration rod 5a will move to the spring 7.
The positions of the deaeration rods 5a and 5b could not be raised too much because they interfered with the gripping arms 3a and 3b and other peripheral devices.

That is, since the deaeration rods 5a, 5b make a movement similar to horizontal movement in the vicinity of the bag 1, when the deaeration rods 5a are brought to the above-mentioned high positions, the deaeration rods 5a are rotated fulcrums (gear 4).
When it rotates around a), it comes into contact with the spring 7. In particular, when the pinching position of the deaeration rods 5a and 5b is brought to a position between the gripping claws 2a and 2b, the inner deaeration rod 5a comes into contact with the spring 7 and the deaeration rods 5a and 5b. If the table T is not opened wide, the gripping arm 3 will not move when the table T rotates.
When a and 3b come into contact with the inner deaeration rod 5a, while they are wide open, the inner deaeration rod 5a comes into contact with peripheral devices such as the table T.

In addition, when the deaeration rods 5a and 5b simultaneously squeeze both side surfaces of the bag 1, the impact causes the bag 1 to sway greatly, and the swaying of the bag due to centrifugal force cannot be stopped. Stability becomes poor and deaeration failure occurs, or table T
There is a problem that the bag comes into contact with peripheral devices when the device rotates.

The present invention has been made in view of the above problems of the prior art, and is a degassing / sealing device for degassing air remaining inside a bag containing a filling material to seal an opening,
Being able to set the pinching position of the deaeration rod to an appropriate position, and more specifically, to be able to pinch without difficulty even at a high position such as in the immediate vicinity of the gripping claw or between the gripping claws. The first purpose is to do so, and the second purpose is to suppress the swinging of the bag during pinching.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a pair of deaeration rods configured to be openable and closable sandwich an opening of a bag containing a filling and having both side edges grasped by grasping claws from both sides thereof. In a deaeration sealing device that depressurizes the air remaining inside and then seals the bag mouth, the outer deaeration rods sandwich the opening from the horizontal direction of the rotation fulcrum of the pair of deaeration rods. As described above, it is characterized in that it is set almost directly below the bag, and the inner deaeration rod is set to a position outside the rotation fulcrum of the outer deaeration rod so as to clamp the opening from diagonally downward. As a preferred specific embodiment of the deaeration sealing device, a pair of deaeration rods can be independently driven, and a height position of the pair of deaeration rods can be arbitrarily adjusted. There are things to do.

[0010]

In the degassing / sealing device described above, the outer deaeration rod of the pair of deaeration rods acts substantially horizontally and the inner deaeration rod acts diagonally downward when pinching the opening of the bag. It comes to pinch. This prevents the inner deaerator from interfering with the spring 7, the gripping arm, and other peripheral devices even if the deaeration bar clamping position is set higher than before. Can be set to the proper position.

In the above deaeration sealing device, each deaeration rod can be independently driven. For example, one deaeration rod first comes into contact with the side surface of the bag, and then the other deaeration rod is attached to the side surface of the bag. By pressing and pinching, the swaying of the bag is suppressed at the first contact, and good deaeration is performed. Further, in the above degassing / sealing device, if the height position of the degassing rod can be arbitrarily adjusted, it is easy to adjust the pinching position to an appropriate height according to the filling state of the filling material in the bag. Become.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In addition, FIG. 1 is an overall configuration diagram of the deaeration sealing device,
FIG. 3 is a detailed view of a main part thereof, and FIGS. 3 (a) to 3 (e) are views showing an operation procedure of the apparatus. In FIGS.
The same numbers are given to the same parts.

In FIGS. 1 and 2, the bag 1 is gripped on both side edges by gripping claws 2a and 2b provided at the tips of gripping arms 3a and 3b (only one pair is shown for explanation) attached to a table T. In the process of intermittent rotation with the table T, a filling device or the like (not shown) arranged around the table T is charged with a filling material, and then the degassing and sealing device is degassed and subsequently the bag mouth is heat-sealed. To be done. The deaeration sealing device is a deaeration device that presses both side surfaces of the opening of the bag 1 gripped by the gripping claws 2a and 2b to remove air remaining above the filling (liquid) contained in the bag 1. 10 and a sealing device 11 that heat-seals the bag mouth after degassing.

The deaeration device 10 supports the inner deaeration rod 5a and the outer deaeration rod 5b which pinch the opening of the bag 1 from both sides, and the deaeration rods 5a and 5b, and supports the fulcrum O ₁ or O. Support arms 12a and 12b that rotate around ₂ and a drive rod 1 that is driven by independent drive sources (cam mechanism, air cylinder, etc.) to rotate the support arms 12a and 12b.
The sealing device 11 includes a pair of hot plates 6a and 6b each having a built-in heater and a driving device (not shown) thereof.

Of the pair of deaeration rods 5a, 5b, the fulcrum O ₂ of the support arm 12b that supports the outer deaeration rod 5b located on the outer side of the table T is grasped by the grasping claws 2a, 2b and suspended. The inner deaeration rod 5 is located almost directly below the bag 1, but is located inside the table T when viewed from the table T.
The fulcrum O ₁ of the support arm 12a that supports a is set at a position slightly offset from the fulcrum O ₂ to the outside. Therefore, the driving arm 13b is driven to drive the support arm 12b.
Is rotated about the fulcrum O ₂ , the outer deaeration rod 5b acts on the side surface of the opening portion of the bag 1 in a substantially horizontal direction (see the arrow in FIG. 2).
When a is rotated around the fulcrum O ₁ , the inner deaeration rod 5a is slanted downward with respect to the side surface of the opening of the bag 1 (see the arrow in FIG. 2).
Comes to work from.

On the other hand, the deaeration rods 5a, 5b are the support arms 1
2a and 12b are attached via a mounting portion 14a and 14b so as to be adjustable in height, and the mounting position is moved in the vertical direction according to the amount of the filling (liquid) in the bag 1 so that the bag 1 can be clamped. The pressure position can be freely adjusted to an appropriate position. For example, when the filling is filled up to the opening of the bag 1 and the filling liquid is blown out from the bag mouth together with air at the normal clamping position shown by the solid line in FIGS. 1 and 2, The deaeration rod 5 through the mounting portions 14a and 14b
a and 5b slightly above (a pair of gripping claws 2 in FIGS. 1 and 2).
a position between a and 2b, indicated by a virtual line). By raising the pinching position in this way, liquid is not blown out from the bag mouth, and good deaeration is performed.

At this time, since the inner deaeration rod 5a moves diagonally downward toward the pressing position of the bag 1, the predetermined pressing surface can be pressed accurately without being disturbed by the spring 7. When the deaeration rods 5a and 5b are opened after the bag mouth is sealed, the deaeration rod 5 can be opened even if the opening degree is not so large.
Since “a” largely descends downward, there is no possibility that the gripping arm 3a will come into contact with the deaeration rod 5a when the table T rotates.
There is no possibility that the deaeration rod 5a will come into contact with the equipment around the table T.

When the pair of deaeration rods 5a and 5b are simultaneously operated to squeeze both side surfaces of the bag 1, the impact causes the bag 1 to shake greatly, causing liquid to be spilled from the bag mouth and the table T to rotate. At this time, the bag 1 may touch the support arms 12a and 12b. In such a case, it is advisable to slightly shift the pinching timing between the inner deaeration rod 5a and the outer deaeration rod 5b. For example, after the outer deaeration rod 5b is actuated a little earlier to bring it into contact with the side surface of the opening of the bag 1, the inner deaeration rod 5a is slightly separated.
Operate to pinch. As a result, the shaking of the bag 1 due to the stop of the table T is stopped, the shock due to the pinching pressure is reduced, the shaking of the bag 1 is suppressed, and good deaeration is performed.

Next, the deaeration and sealing procedure of this deaeration sealing device will be described with reference to FIG. First, the filling (liquid)
When the bag 1 held by the gripping claws 2a and 2b is sent to the sealing position (FIG. 3A), the gripping arm 2
After a little distance between a and 2b to loosen the bag mouth, the drive rod 13b is driven, and the outer deaeration rod 5b is rotated through the support arm 12b to contact the side surface of the opening of the bag 1 (Fig. 3 (b)). Then, the drive rod 13a is driven with a slight delay, the inner deaeration rod 5a is rotated via the support arm 12a, and the side surface of the opening of the bag 1 is pinched from the opposite side. As a result, deaeration is performed (FIG. 3 (c)). When deaeration is completed, the grip arms 2a and 2b are slightly opened to give tension to the bag mouth, and then the bag mouth sealing surfaces are sandwiched between the heat plates 6a and 6b to perform heat sealing (FIG. 3 (d)). When the deaeration and heat sealing are completed in this way, the hot plates 6a, 6b and the deaeration rod 5a,
5b is opened from the side surface of the bag 1 (FIG. 3 (e)), and then the bag 1 is sent to the next step by the table T.

[0020]

According to the degassing / sealing device of the present invention, when degassing the bag in which the filling is stored, the outer deaerating rod acts from a substantially horizontal direction and the inner deaerating rod acts from an obliquely downward direction. Since the opening is pinched, it is possible to pinch an appropriate part without being disturbed by devices such as springs and gripping arms.
Good degassing is performed. Further, in the above deaeration sealing device, if the height position of the deaeration rod can be arbitrarily adjusted, the height of the deaeration rod can be easily adjusted according to the filling state of the filling material in the bag. The degassing is done properly and properly. Also, if both deaerators can be driven independently,
After one deaeration rod is brought into contact with the bag clamping surface, the timing can be slightly delayed to operate the other deaeration rod to clamp the bag, and the shaking of the bag when the table is stopped can be stopped. Also, the impact due to the pinching pressure is reduced, the shaking of the bag is suppressed, the obstacles due to the blowing and shaking of the liquid are eliminated, and good deaeration is achieved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a degassing sealing device of the present invention.

FIG. 2 is a detailed view of the essential parts of the degassing and sealing device of the present invention.

FIG. 3 is a diagram showing a deaeration and sealing procedure of the deaeration sealing device of the present invention.

FIG. 4 is a diagram showing a conventional degassing seal device and its operating procedure.

[Explanation of symbols]

1 bag 2a, 2b gripping claws 3a, 3b gripping arm 5a inner deaeration rod 5b outer deaeration rods 6a, 6b hot plate 7 springs 12a, 12b support arms O ₁ , O ₂ rotation fulcrum T table

Claims (3)

[Claims] 1. A pair of deaeration rods configured to be openable and closable to squeeze the opening of a bag which holds a filling and whose both edges are gripped by gripping claws from both sides of the bag, thereby removing air remaining inside. In a deaeration sealing device for deaeration and subsequent sealing of the bag mouth, the rotation decenter of a pair of deaeration rods is placed almost directly below the bag so that the outer deaeration rods pinch the opening from the horizontal direction. A degassing / sealing device for an automatic packaging machine, wherein the inner deaeration bar is set at a position outside the rotation fulcrum of the outer deaeration bar so as to pinch the opening from an obliquely downward direction. 2. The deaerating and sealing device for an automatic packaging machine according to claim 1, wherein the pair of deaerating rods can be independently driven. 3. The degassing / sealing device for an automatic packaging machine according to claim 1, wherein the height positions of the pair of deaeration rods can be adjusted arbitrarily.