JP2003104305A - Cup vessel sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cup vessel sealing device which can prevent degradation of a product caused by oil leakage without providing any equipment for oil leakage prevention, and can be continuously disposed close to each other, or installed within an aseptic filling line without any limitation to the space or the cost in installing the device. SOLUTION: In the cup vessel sealing devices 10 and 11, a film for a lid placed on an opening flange of a vessel is pressed from above by a heating unit with a heater built therein against the cup vessels which are continuously carried after the vessels are filled with the content, and the film is heat-bonded to the opening flange part. The rotation of an electric motor 40 to be electrically controlled is transmitted to a screw shaft 51 of a ball screw mechanism 50 via rotation transmitting means 41, 42 and 43, and a base panels 20 and 30 to support heating units 21 and 31 are integrally fixed to a nut 52 of the ball screw mechanism 50 which is vertically reciprocated by the rotation of the screw shaft 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aseptic filling line for filling and sealing foods and beverages in a substantially sterile state,
The present invention relates to a cup container sealing device in which a film is heat-welded to an opening flange portion of a container, which is continuously conveyed after being filled with contents.

[0002]

2. Description of the Related Art In an aseptic filling line for filling and sealing foods and beverages in a substantially sterile state, a cup-shaped container made of paper or plastic is provided with a conveyer conveyor (retainer) having holes for inserting the container. When the container is filled with contents and then sealed at the container opening while being conveyed at a predetermined interval by), the container after being filled with the contents is sent toward the sealing step by the conveyor. On the other hand, by continuously sterilizing a long strip-shaped film continuously fed from the supply coil before feeding it to the sealing step, the opening flange of the container filled with the content in the sealing step. A sterilized film is heat-sealed and sealed on the part, and the heat-welded film is cut (punched) as the lid (lid) according to the opening flange of the container. It is conventional to refer (e.g., JP-B-61-3684, JP-A No. 9-5
No. 8633, etc.).

In the sealing device used in the sealing process of such a cup container, conventionally, the base part supporting the heating part containing the heater is reciprocally moved up and down by using a hydraulic cylinder. By pressing the lid film placed on the opening flange portion of the container from above at the lower end portion of the heating portion supported by the above, the lid film is heat-welded to the opening flange portion of the container. ing.

[0004]

By the way, the conventional cup container sealing device as described above is operated by using the hydraulic cylinder for vertically reciprocating the base part supporting the heating part. If oil leaks from the oil supply pipe or the hydraulic cylinder itself,
In order to prevent the product from being affected when oil leaks,
By providing equipment for preventing oil leakage or providing a cover for avoiding oil on the transportation path, equipment cost is required and labor and cost for maintenance thereof are increased.

In the case of driving with a hydraulic cylinder,
If the number of cylinders is set to one and the cylinders are connected to the center of the base part that supports the heating part, when oil leaks from the cylinders, the product is conveyed directly below it, so the oil I dropped it on top, and again
When containers are transported in multiple rows, the length of the base part that commonly supports multiple heating parts (length in the direction orthogonal to the container transport direction) becomes longer, so the center of the longitudinal direction If a cylinder is connected to the base, the base part will bend when it reciprocates up and down, causing uneven heating and pressurization of each heating part supported by the base part, which adversely affects the product sealing. Becomes

Therefore, by using two cylinders,
By providing cylinders on the left and right sides of the container transport path, cylinders are often connected to both sides of the base part that supports the heating unit in the longitudinal direction. It becomes necessary to adjust the positions of the upper and lower dead points, and it becomes necessary to equalize the lengths of the pipes to the left and right cylinders.

Further, in order to secure the sealing property and the adhesion strength of the lid, two sealing devices are continuously arranged in close proximity to each other in the sealing process, and one sealing device is used for the opening flange portion of the container. Prior to the application of the present application, it is prior to the application of the present application that the lid film is linearly heat-welded to the lid opening film of the container with the other sealing device. It has already been proposed by a person (Japanese Patent Application 200).
0-397374), in such a case, the installation space of the sealing device itself becomes large, and the number of hydraulic cylinders for driving the device, the number of piping systems, and other equipment related to hydraulic cylinders are doubled. Therefore, the problems such as the time and labor required for adjusting the position of the heating unit and the restriction on the equipment design due to the installation of the pipes become more remarkable.

In addition, a hydraulic pressure generator is required to use the hydraulic cylinder. However, when filling and sealing a cup container in an aseptic filling line, the entire line is in a clean room (air from Class 10000). Installed in a clean booth with higher air cleanliness (air cleanliness higher than Class 100), so the hydraulic pressure generator should be installed near the sealers. Since it cannot be installed and must be installed outside the clean room, the piping for transmitting hydraulic pressure from the hydraulic pressure generator to the hydraulic cylinder becomes longer, and the required equipment cost is higher than that of a normal line. Grows larger.

Regarding the class of air cleanliness, N
According to the standard of ASA, standard particles (particle size 0.5 micron or more) existing in a predetermined space (ft ³ ).
It indicates the cleanliness of air by the number of
00 is the number of reference particles 11 to 100 particles / ft ³ , class 1000 is 101 to 1000 particles / ft ³ , class 10
0,000 is 10,001～100,000 pieces / ft ³
Is.

The present invention is intended to solve the above-mentioned problems, and more specifically, for a sealing device for a cup container, deterioration of the product due to oil leakage can be prevented without providing equipment for oil leakage prevention. It is possible to prevent this, and when installing the equipment, place the two equipment in close proximity to each other consecutively, or place the equipment in an aseptic filling line without being constrained by space or cost. The problem is to make it suitable for installation.

[0011]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to an opening flange portion of a container for a cup container which is continuously conveyed after being filled with contents. In the sealing device for the cup container, the film for the lid placed on is pressed from above by a heating part having a heater built therein to heat-weld the film to the opening flange part of the container. The rotation of the operation-controlled electric motor is transmitted to the screw shaft portion of the ball screw mechanism through the rotation transmission means, and the heating portion is supported by the nut portion of the ball screw mechanism that reciprocates up and down by the rotation of the screw shaft portion. It is characterized in that the base portion is integrally fixed.

According to the above construction, the electric motor and the ball screw mechanism are used as the drive source for vertically reciprocating the base portion supporting the heating portion without using the hydraulic cylinder. In addition, it is possible to prevent product deterioration due to oil leakage without incurring equipment costs, and there is no need to provide piping for supplying hydraulic oil from the hydraulic pressure generator to the hydraulic cylinder, so when installing the device. There are no restrictions on space or cost, and even if ball screw mechanisms are installed on both sides in the longitudinal direction of the base part that supports the heating part, one electric motor allows the ball screw mechanisms on the left and right sides to be installed. It is possible to drive them at the same time, and it is possible to easily adjust the positions of the top and bottom dead centers on both sides of the base part that supports the heating part.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a sealing device for a cup container according to the present invention will be described below in detail with reference to the drawings. In addition, about one Embodiment of this invention, FIG. 1 shows the whole aseptic filling line of a cup container schematically, and FIG.
FIG. 4 shows two sealing devices used in the aseptic filling line sealing process shown in FIG. 2 in a side view, and FIG. 3 shows one of the two sealing devices shown in FIG.
Shows the structure near the heating part for one of the two sealing devices shown in FIG. 2, and FIG. 5 shows the structure near the heating part for the other of the two sealing devices shown in FIG. 6A and 6B show a state at the time of (A) heat welding by the sealing device shown in FIG. 4 and (B) a welding portion of the flange portion, respectively, and FIG. 7 shows (A) heat welding by the sealing device shown in FIG. FIG. 8 shows the operating state of the device in the sealing step, and FIG.

The cup container sealing device according to the present embodiment is installed in an aseptic filling line of a cup container.
In the aseptic filling line, as shown in FIG. 1, each container (not shown) separated from the stacked state and supplied to the line is continuously conveyed in a plurality of rows (for example, 7 rows) by a conveyer (retainer) 3. Device 4 for detecting overlapping containers and separating and removing overlapping containers while transporting
Then, after passing through a device 5 for removing static electricity from the container to remove dust adhering to the container with a vacuum, apply a bactericide to both inner and outer surfaces of the container, dry with hot air, and cool with sterile air. After sequentially passing through the sterilizing devices 6 and 7, the contents are filled in the container by the filling device 8 in an empty sterilized container.

Next, for each container filled with the contents by the filling device 8, the air in the headspace of the container is replaced with nitrogen gas by the nitrogen gas replacement device 9, and then the film 12 is drawn on the opening flange of the container. Wire welding apparatus 10 for welding in a circular shape, and a film 12 on the opening flange portion of the container.
Lid welding / cutting device 11 for cutting a sheet after it is welded in a plane shape
And are sequentially passed, the sterilized film 12 fed from the film supply coil 13, immersed in the sterilizing solution in the sterilizing tank 14, and dried with hot air in the drying device 15 opens the opening of the container into a film-like lid. After sealing with the (lid), the used film having the lid portion punched out is collected in the film winding coil 16, and the container sealed with the lid is passed through the lid seal sealing inspection device 17, and then the container is closed. The conveyor 3 by the discharge device 18
Discharged from the line.

The aseptic filling line 1 as described above is entirely installed inside a clean room (a room having a higher air cleanliness than class 10,000) including an accessory part (not shown), and a major part of the line is provided. A part (a part surrounded by a dashed line in FIG. 1) is installed inside a clean booth (a room having a higher air cleanliness than the class 100) where the air cleanliness is in a high level region.

The transfer of cup containers in the aseptic filling line may be carried out in a single row in some cases, but it is efficient to carry out a multi-row transfer in which a plurality of containers are simultaneously advanced in the width direction as described above. Filling and sealing may be carried out laterally in a row in the width direction (one in the case of single-row conveyance), or in a plurality of numbers in the conveyance direction and in the width direction (conveyance direction in the single-row conveyance). However, in any case, in order to temporarily stop the transportation of the container at the time of filling or sealing, the cup container is transported so as to progress intermittently. .

Further, the conveyer used to convey the cup container has a conventionally well-known structure, and has a function of a retainer (holding tool) for holding each cup container at a predetermined interval. Although not shown, the cup container is fitted into a plurality of holes provided at predetermined intervals in the width direction and the length direction of the conveyor, and the opening flange portion at the upper end of the cup container is conveyed. It is a belt conveyor configured to convey a large number of cup containers at a predetermined interval while being placed on the convey surface of the conveyer.

By the way, in the aseptic filling line 1 for cup containers as described above, as a process for sealing the cup container filled with the contents by the filling device 8, the lid wire welding device 10 and the lid welding cutting device 11 are used. The sterilized film 12 that has passed through the two sealing devices sequentially and passed through the sterilization tank 14 and the drying device 15 is used as a lid (lid). First, the lid wire welding device 10 is used to open the opening flange portion of the container. After the film 12 is linearly heat-welded to the surface of the container, the film 12 is planarly heat-welded to the opening flange portion of the container by the lid welding cutting device 11, and the film 12 is fitted to the opening flange portion of the container. By cutting, the opening of the container is sealed with a film-like lid (lid).

That is, in the lid wire welding device 10 which is the first sealing device, as shown in FIG.
The heating unit 21 having the heat head 23 in which the
The air cushion member 22 is supported by the base portion 20 that reciprocates up and down, and the heating portion 21 is connected to the lower end of the vertical sliding shaft 22a of the air cushion member 22. The heating portion 21 is relatively movable upward against the air pressure of the air cushion member 22 fixed to the. Further, a tensioner 25 for preventing the film 12 from loosening is movably connected to the heating unit 21 in a state of being movable upward against the spring force of the spring member 26.

Then, such a lid wire welding device 10 is used.
Thus, as shown in FIG. 6 (A), the linear shape formed in the lower end of the heat head 23 of the heating unit 21 (the planar shape extending along the center of the opening flange portion of the container in the width direction has a very wide tip surface). The heat seal portion 23a having a narrow shape allows the container 2
Of the container 2 by pressing the film 12 placed on the opening flange 2a of the container 2 from above.
On the other hand, the film 12 is heat-welded in the form of a line (a very narrow surface) as shown by the hatched portion in FIG. 6 (B).

Further, in the lid welding cutting device 11 which is the second sealing device, as shown in FIG. 5, the heating portion 31 having the heat head 33 having the heater 34 built-in is in the state of interposing the air cushion member 32. The air cushion member 32 fixed to the base portion 30 is supported by the base portion 30 that vertically reciprocates, and the heating portion 31 is connected to the lower end of the vertical sliding shaft 32a of the air cushion member 32. The heating portion 31 is relatively movable upward against the air pressure of the above. Further, a pressing member 35 for pressing the film 12 onto the transport conveyor (retainer) 3 around the opening flange portion of the container with respect to the base portion 30 moves upward against the spring force of the spring member 36. A planar cutter 37 is fixedly connected along the outer edge of the opening flange portion of the container.

Then, such a lid welding cutting device 1
As shown in FIG. 7 (A), the sheet-like heat seal portion 33a is formed on the lower end of the heat head 33 of the heating portion 31 (planar shape corresponding to substantially the entire upper surface of the opening flange portion of the container). Then, by pressing the film 12 placed on the opening flange portion 2a of the container 2 from above, the film 12 is pressed against the opening flange portion 2a of the container 2 as shown in FIG.
The film 12 is heat-welded in a planar shape as shown by the hatched portion in FIG.
While pressing on the conveyor (retainer) 3,
Film 1 heat-welded to opening flange portion 2a of container 2
A peripheral portion of the flange 2 is cut by a cutter 37.

By sealing the cup container using the two sealing devices, the lid wire welding device 10 and the lid welding cutting device 11 as described above, the lid wire welding device 10 performs linear heat welding to form a container. The small area around the entire circumference of the opening flange portion 2a of No. 2 can be surely heat-welded without causing defective welding, and the sealing property of the container by the film 12 can be ensured and the lid welding can be performed. The planar heat welding by the cutting device 11 heat-welds a large area over the entire circumference of the opening flange portion 2a of the container 2, so that the heat-welded film 12 is not accidentally peeled off. It is possible to sufficiently secure the joining force between the second opening flange portion 2a and the film 12.

By the way, in the cup container sealing device such as the lid wire welding device 10 and the lid welding cutting device 11 described above, conventionally, the base parts 20, 30 for supporting the heating parts 21, 31 are reciprocated up and down. As a means for this, a hydraulic cylinder driven by the hydraulic pressure of hydraulic oil supplied from a hydraulic pressure generator is used, and the base portions 20 and 30 connected to the lower end of the cylinder by expansion and contraction of the cylinder are used.
By vertically reciprocating, the heating parts 21 and 31 supported by the base parts 20 and 30 are vertically reciprocated.

On the other hand, in the cup container sealing device of the present embodiment, both of the lid wire welding device 10 and the lid welding cutting device 11 which are continuously provided close to each other, As shown in FIG. 2, the heating unit 2
As means for vertically reciprocating the base parts 20, 30 supporting the 1, 31, electric motors that are electrically operated and controlled, that is, the rotation direction, the number of rotations, and the rotation speed are controlled by an input electric signal. Electric servo motor 40
And a ball screw mechanism 50 in which a rolling ball is fitted between the screw shaft portion 51 and the nut portion 52 (the electric servomotor 40 and the ball screw mechanism 50 themselves are both conventional. It is of a commonly known structure).

That is, in the lid wire welding apparatus 10,
(Note that the description of the lid wire welding device 10 below is the same as in the case of the lid welding cutting device 11, so the description of the lid welding cutting device 11 will be omitted). Specifically, FIG. As shown in FIG.
The base portion 20 that supports 1 supports a plurality of (seven) heating units 21 according to the number of rows (7 rows) of the transport rows of the cup container 2, and a direction that traverses the transport rows of the cup container 2. The base portion 20 extends long in the (direction orthogonal to the transport direction).
A ball screw mechanism 50 including a screw shaft portion 51 and a nut portion 52 is provided for each of both sides in the longitudinal direction (direction orthogonal to the transport direction).

On both sides of the base portion 20 supporting the plurality of heating portions 21 in the longitudinal direction (direction orthogonal to the conveying direction), two pieces are provided on each side of the conveying row of the cup container, as shown in FIG. Each of the columns 60 arranged in total (four in total) penetrates the base portion 20, and the base portion 20 is slidably guided in the vertical direction by the column 60 and is fixed to the upper end of the column 60. The electric servomotor 40 is fixedly supported by the support plate 61, and the upper end portion of the screw shaft portion 51 of the ball screw mechanism 50 is penetrated therethrough.
In the nut portion 52 screwed to the screw shaft portion 51 of 0,
The base portion 20 is integrally fixed.

The output shaft of the servo motor 40,
The upper end portion of the screw shaft portion 51 of the ball screw mechanism 40 is linked with the pulleys 41 and 42 and the rotation transmission means by the belt 43, so that one servo motor 40 controlled by an input electric signal. Rotation is the base 20
Is transmitted to the screw shaft portions 51 of the respective ball screw mechanisms 50 arranged on both sides of the base portion 20 fixed to the nut portions 52 as the nut portions 52 reciprocate up and down by the rotation of the screw shaft portions 51. The (both sides in the longitudinal direction of the base portion 20) reciprocate up and down while being guided by the columns 60.

The ball screw mechanism 50 itself has a conventionally known structure, but with respect to the lubrication between the screw shaft portion 51 and the nut portion 52 into which the ball is fitted, grease having a high viscosity is used. It is desirable to use a type of lubricant, and to prevent the lubricant from leaking, the nut 5
It is desirable that 2 has a sealed structure. That is, the speed of rotation of the screw shaft portion 51 during operation of the device is about several hundreds of revolutions per minute, and the lubricant may scatter without affecting the product even if the nut portion 52 does not have a sealed structure. However, by doing so, it is possible to more reliably prevent the occurrence of defective products due to the leakage or scattering of the lubricant.

With respect to the servo motor 40, it is possible to generate a driving torque required to vertically reciprocate the base portion 20 supporting the plurality of heating portions 21, and to perform necessary control such as the rotation speed and direction. If the electric motor can
A conventional structure can be used.
In addition, the rotation of the servomotor 40 is controlled by the ball screw mechanism 50.
The rotating force transmitting means for transmitting to the screw shaft portion 51 is not limited to the pulleys 41 and 42 and the belt 43, but an appropriate rotating force transmitting means such as a gear or a shaft coupling can be used.

In the present embodiment, in both the lid wire welding device 10 and the lid welding cutting device 11, the sealing portions 21 and 31 press the film 12 against the opening flange portion 2a of the container 2 to heat it. When you seal
The rotation of each servo motor 40 is controlled so that the descending speed of the base portions 20 and 30 supporting the heating portions 21 and 31 is reduced immediately before the heating portions 21 and 31 contact the film 12.

As described above, the cup container of the present embodiment which uses the electric servomotor 40 and the ball screw mechanism 50 as means for vertically reciprocating the base portions 20 and 30 supporting the heating portions 21 and 31. Sealing device 10,1
According to 1, the base portion 20, which supports the heating portions 21 and 31,
By using an electric motor (servo motor) 40 and a ball screw mechanism 50 as a drive source for vertically reciprocating 30 without using a hydraulic cylinder, a product due to oil leakage can be provided without incurring equipment costs. It is possible to prevent deterioration, and because it is not necessary to provide piping for supplying hydraulic oil from the hydraulic generator to the hydraulic cylinder, there is no space restriction or cost restriction due to installation of piping. As a result, restrictions on installation of equipment are reduced, and installation space can be reduced.

In particular, in this embodiment, since two sealing devices (the lid wire welding device 10 and the lid welding cutting device 11) are continuously arranged in close proximity to each other in the sealing process, when the hydraulic cylinder is used. The number of hydraulic cylinders and the number of piping systems will double the number of equipment related to hydraulic cylinders, so the effects of eliminating the above-mentioned restrictions when installing equipment and reducing the installation space are more prominent. In addition, since the sealing device is installed in the clean booth in the aseptic filling line, the effect of not having to provide the pipe from the hydraulic pressure generating device as described above becomes more remarkable.

Further, in this embodiment, a plurality of heating units 2 are provided.
Although the ball screw mechanisms 50 are provided on both sides of the base portions 20 and 30 supporting the bases 1 and 31 in the longitudinal direction, respectively, even if the ball screw mechanisms are provided on both sides of one base portion, one servo is provided. The motor 40 can drive both ball screw mechanisms 50 at the same time, and can easily adjust the positions of the top and bottom dead centers on both sides of the base part that supports the heating part, and can be electrically controlled by an electric motor. By using the servo motor 40 of as a drive source, the position and operation of the heating part can be freely changed only by changing the electrical signal, and the shape of the cup of the product and the manufacturing speed of the line can be changed. When the operation of the heating unit is changed by changing the above, etc., the labor and time can be greatly reduced.

The driving force generated by the electric motor is generally smaller than the driving force by the hydraulic cylinder, and the pressing force necessary for sealing the container may not be generated by the driving force of only one electric motor. However, even in such a case, by increasing the weight of the heating part and adding the pressing force by the heating part's own weight and the pressing force by the electric motors, the necessary pressing pressure can be obtained without increasing the number of electric motors. Can be secured.

Further, in this embodiment, the film 12 is pressed against the opening flange portion 2a of the container 2 by the heating units 21 and 31 by each of the two sealing devices (the lid wire welding device 10 and the lid welding cutting device 11). When heat-sealing by heat (heat sealing), as shown in FIG. 8 (shown as an example), the descending speed of the base portion supporting the heating portion is reduced immediately before the heating portion contacts the film, By controlling the rotation of the electric motor (servo motor) 40, it is possible to soften the impact when the heating units 21 and 31 descend and come into contact with the lid film 12, and the impact at the time of contact causes the film to move. It is possible to prevent inconveniences such as damage to the sheet and peeling of the print.

That is, in the conventional cup container sealing device, since the base portion supporting the heating portion is moved up and down by the hydraulic cylinder, it is difficult to adjust the ascending / descending speed. (As shown as a cylinder), the base part that supports the heating part must be moved up and down at a constant speed, so that a cushioning member such as an air cushion is provided between the heating part and the base part that supports the heating part. Even if
There is a risk that the film may be damaged or the print may be peeled off due to the impact when the heating part contacts the film. In the present embodiment, the base part that supports the heating part is moved up and down by the electric servomotor 40. Therefore, the ascending / descending speed can be easily controlled as described above.

Although one embodiment of the cup container sealing device of the present invention has been described above, the present invention is not limited to the specific examples shown in the above embodiments, and for example, a sealing device is used. The production line to be used is not necessarily limited to the aseptic filling line as shown in the above embodiment, and can be implemented as a sealing device used in an ordinary production line, and the state of use of the sealing device can be used. As for the above, not only the case where the two sealing devices as shown in the above-described embodiment are used in a state where they are closely arranged continuously, but also the case where only one sealing device is used alone is performed. Needless to say, it is possible to appropriately change such as possible.

[0040]

According to the cup container sealing device of the present invention as described above, an electric motor and a ball screw mechanism are used as a drive source for moving the heating part up and down without using a hydraulic cylinder. By doing so, it is possible to prevent product deterioration due to oil leakage without incurring equipment costs, and since it is not necessary to install a hydraulic pressure generator or piping for hydraulic oil supply, it is possible to prevent hydraulic pressure when installing the device. There is no space restriction or cost restriction due to the system equipment, and when changing the operation of the heating part by changing the cup shape of the product or the manufacturing speed of the line, simply change to the device. By simply changing the electric signal of, it is possible to easily cope with it without taking labor and time.

[Brief description of drawings]

FIG. 1 is an explanatory side view schematically showing an aseptic filling line in which the cup container sealing device of the present invention is used.

2 is a side view showing each embodiment (a lid wire welding device and a lid welding cutting device) of the cup container sealing device of the present invention installed in the aseptic filling line sealing step shown in FIG. 1. FIG.

FIG. 3 is a front view showing one (lid wire welding device) of the cup container sealing devices shown in FIG. 2;

4 is a partial cross-sectional side view showing the structure in the vicinity of a heating portion of one of the sealing devices for a cup container shown in FIG. 2 (lid wire welding device).

5 is a partial cross-sectional side view showing a structure in the vicinity of a heating portion of the other (lid welding cutting device) of the cup container sealing devices shown in FIG.

FIG. 6 shows a lid wire welding device shown in FIG.
(A) A sectional explanatory view showing a state at the time of heat welding, and (B)
The upper surface explanatory view which shows the welding part of the opening flange part of a container, and a film with a diagonal line.

FIG. 7 shows a lid welding cutting device shown in FIG.
(A) Cross-sectional explanatory view showing a state at the time of heat welding and cutting, and (B) an upper surface explanatory view showing a welded portion between the opening flange portion of the container and the film with oblique lines.

FIG. 8 is an explanatory diagram showing an operating state of the sealing device in the step of sealing the cup container.

[Explanation of reference numerals] 1 Aseptic filling line for cup container 2 Cup container 2a (Opening flange portion of cup container) 10 Lid wire welding device (sealing device for cup container) 11 Lid welding cutting device (sealing device for cup container) 12 Film 20, 30 (Supports the heating part) Base part 21, 31 Heating part 24, 34 Heater 40 Electric motor 41, 42 Pulley (rotation transmitting means) 43 Belt (rotation transmitting means) 50 Ball screw mechanism 51 (ball screw mechanism) screw Shaft 52 Nut part (of ball screw mechanism)

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E049 AA05 AB03 BA01 BA04 CA08                       DB02 EB03 EC02                 3E094 AA06 BA02 BA12 CA02 CA06                       CA12 CA14 DA02 EA01 GA12                       HA05 HA09

Claims (4)

[Claims] 1. A cup film, which is continuously conveyed after being filled with contents, is covered with a film for a lid placed on an opening flange portion of the container by a heating unit having a built-in heater. In a cup container sealing device in which the film is heat-welded to the opening flange portion of the container by pressing from above, the rotation of an electrically operated electric motor is electrically controlled to rotate through a rotation transmission means and a screw of a ball screw mechanism is used. Sealing a cup container characterized in that a base portion supporting a heating portion is integrally fixed to a nut portion of a ball screw mechanism that is transmitted to the shaft portion and reciprocates up and down by the rotation of the screw shaft portion. apparatus. 2. A cup container sealing device for linearly heat-bonding a film to an opening flange portion of a container in a step of sealing a cup container, and a film planar to the opening flange portion of the container. The cup container sealing device according to claim 1, wherein the cup container sealing device for heat welding and the cup container sealing device are continuously arranged in close proximity to each other. 3. The cup container sealing device according to claim 1, wherein the cup container sealing device is installed in an aseptic filling line. 4. When the heating portion presses the film against the opening flange portion of the container for heat welding, the descending speed of the base portion supporting the heating portion is reduced immediately before the heating portion contacts the film. The cup container sealing device according to claim 1, wherein the rotation of the electric motor is controlled.