JPH0457724A - Sealing method and device therefor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applicability] The present invention relates to a sealing method in which a film sheet is welded to the sealing surface of a capacitor opening that accommodates, for example, gel-like materials, liquids, and powders, and a sealing method thereof. Regarding equipment.

[Prior art] Conventionally, when sealing a plastic molded body with a film sheet, a wide film wound into a roll is stretched from both the unwinding side and the winding side. A sealing method is known in which the film is brought into close contact with the sealing surface of the molded container, and then the film is punched out to fit the molded container.

This punching is performed so that the film sheet S is one size larger than the molded container Y, as shown in FIG. 9, in order to avoid damaging the molded container.

By the way, when a toner container as a molded container used in a copying machine or the like is sealed by such a sealing method, the end of the sealed film sheet protrudes from the sealing surface Ya. When installing this toner container into a copying machine, etc., if the edge of the film sheet gets caught between the toner container and the part where the toner container is installed in the copying machine, it may not be possible to remove the film sheet smoothly. If the film sheet cannot be peeled off, and if it is forcibly peeled off, the film sheet may break and a portion of it may remain stuck, causing various problems.

Therefore, a method has been proposed for sealing using a narrow film, that is, a film having the same width as the container so that the end of the film sheet does not protrude from the sealing surface Ya.

[Problems to be Solved by the Invention] However, when a narrow film is used, it becomes impossible to punch out the film while winding it up with a take-up roll. Then, the cut film (film sheet) is placed in a container, and the film sheet is welded to the sealing surface to seal it.

However, when welding the film sheet, the film sheet cannot be pulled from both ends by the roll as described above, so there is a problem in that the film sheet inevitably wrinkles.

The second invention was made in view of the above problems,
The purpose is to provide a sealing method and a sealing device that do not cause wrinkles in the film sheet.

[Means for Solving the Problems] In order to achieve the above object, it is necessary to: ■ have an opening at the top and a sealing surface around the opening, and each time a container filled with contents is transported; Next, place the film sheet so as to cover the opening of the container, lower the seal bar equipped with a heating bar and wait above the container on which the film sheet is placed, and use the heating bar of the seal bar to close the container. A sealing method in which a film sheet placed on the holder is welded and sealed while being pressed against the sealing surface, and when the film sheet is placed on the sai, one end of the film sheet is temporarily fixed, The present invention is characterized in that the other end of the temporarily fixed film sheet is pulled using the lowering of the seal bar to weld and seal the film sheet.

■It has an opening at the top and a sealing surface is formed around the opening, and each time a container filled with contents is transported, a film sheet is placed to cover the opening of the container. A sealing bar equipped with a heating bar and waiting above a container on which a film sheet is placed is lowered, and the heating bar of the sealing bar presses the film sheet placed on the container against the sealing surface and welds it. The sealing device is provided with a temporary fixing means for temporarily fixing one end of the film sheet when the film sheet is placed on the container, and the other end of the temporarily fixed film sheet is attached to the container. The present invention is characterized in that the seal bar is provided with a tension member that pulls the seal bar as it descends.

[Function] According to the configuration described in (1) above, when a film sheet is placed on the sealing surface of a container, the negative end of the film sheet is temporarily secured, and when the seal bar descends, the other end of the temporarily secured film sheet is temporarily secured. As the part is pulled, the film sheet is welded to the sealing surface of the container to form a seal.

With the configuration described in (2) above, when a film sheet is placed on the sealing surface of the container, one end of the film sheet is temporarily secured by the temporary securing means, and when the seal bar is lowered, the tension member provided on the seal bar temporarily secures the film sheet. The other end of the film sheet is pulled, and the heating bar of the seal bar presses the film sheet against the sealing surface to weld and seal it.

[Example] Hereinafter, an example of a sealing device according to the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a jig that holds a toner container 2 filled with toner (not shown), and this jig 1 is sequentially conveyed in the direction of arrow A by a conveyor belt 3. ing. The toner container 2 has an opening 2b (
(see Figure 2), and has a sealing surface 2 around the opening 2b.
a is formed.

Reference numeral 4 denotes a suction plate that suctions the film sheets 6 placed on the tray 5 one by one. The sheets are placed one by one so as to cover the opening 2b. The suction plate 4 is movable left and right and up and down. A seal bar 7 lowers when the toner container 2 is transported to the station S2 and welds and seals the film sheet 6 placed on the toner container 2.

The film sheet 6 is made of, for example, polyethylene terephthalate, nylon, polyethylene, adhesive resin, or the like. Further, the width of the film sheet 6 is approximately the same as or slightly smaller than the width of the toner container 2, but the length is longer than the length of the toner container 2 for peeling (see FIG. 7).

As shown in FIG. 2, the jig l conveyed by the conveyor belt 3 includes a holding part 1 for holding the toner container 2, and a sheet holder 1b, and the holding part 1a has a container sealing surface 2a. It has a receiving part 1c for receiving the lower surface of the. The height of the sheet holder 1b is set to be approximately the same as the height of the holder 1c.

As shown in FIG. 2, the suction plate 4 includes a lower plate 11 and an upper plate 12.
As shown in FIG. 3, the lower surface of the lower plate 11 is provided with a large number of small suction holes 13 arranged in a grid pattern. Each small hole 13 communicates with a large suction chamber 14 provided between the lower plate 11 and the upper plate 12 in order to perform stable suction.
It communicates with the groove 15 extending to a, so that air can flow even when the film sheet 6 is being sucked.

This is to prevent the suctioned film sheet 6 from being deformed, and also to prevent more than one film sheet 6 from being suctioned from the L-ray 5.

The suction chamber 14 is designed to be suctioned by a suction pump (not shown).

Further, in FIG. 2, reference numeral 16 denotes a guide rod that guides the vertical movement of the suction plate 4.

The film sheet 6 has a thickness of 0.1 mm, the small holes 13 have a diameter of 0.5 mm, and the grooves 15 have a depth of 0.3 mm and a width of 1 mm. Generally, in order to suck the film sheet 6 one by one, the diameter of the small hole 13 is 1 to 15 times the thickness of the film sheet 6, and the depth of the groove 15 is 1/2 of the thickness of the film sheet 6. 5x to 5x, groove 15
The width of the film sheet 6 is preferably set in a range of 1 to 30 times that of the film sheet 6.

Reference numeral 17 denotes an ultrasonic sealing machine (temporary fixing means), which moves up and down with the up and down movement of the suction plate 4, and when the film sheet 6 is placed on the toner container 2, as shown in FIG. The rear end (one end) 6a of the film sheet 6 is pressed by a horn 17a to temporarily fix the rear end 6a to the container sealing surface 2a.

This temporary fixing may be done in several places or in one place.

As shown in FIG. 5, the seal bar 7 is provided with a heating bar 20 on its lower surface 7a that presses the entire circumference of the sealing surface 2a of the toner container 2. As shown in FIG. Further, the seal bar 7 is provided with an elastic member (tension member) 22.
has a plate portion 23 extending diagonally downward, and a contact portion 24 at the tip of the plate portion 23 that is curved to abut the film sheet 6 and prevent the film sheet 6 from being cut.

The contact portion 24 is provided at a position below the heating par 20 of the seal par 7. When the sealer 7 descends, the contact portion 24 first contacts the film sheet 6 before the heating bar 20 contacts the film sheet 6 placed on the toner container 2, and when the sealer 7 further descends,
As it descends, the contact portion 24 moves in the direction of arrow B and pulls the film sheet 6 in the direction of arrow B.

If a material with high slip resistance, such as rubber or soft synthetic resin, is attached to the contact portion 24, the tensile effect can be increased.

Note that the length and inclination angle of the plate portion 23 of the elastic member 22 are determined by the amount of slack in the film sheet 6.

Next, a sealing method using the above sealing device will be explained.

First, the suction plate 4 suctions only one film sheet 6 placed on the tray 5 and waits at the position shown in FIGS. 1 and 2. Then, when the jig 1 holding the toner container 2 is transported to the station S1, the suction plate 4 and the ultrasonic sealing machine 17 are lowered to the position shown in FIG. By this lowering, the rear end 6a of the film sheet 6 is pressed and welded to the sealing surface 2a of the toner container 2 by the horn 17a of the ultrasonic sealing machine 17, thereby temporarily fixing the film sheet 6 to the sealing surface 2a.

When the temporary fixing is completed, the suction by the suction plate 4 is stopped, and the suction plate 4 and the ultrasonic sealing machine 17 are raised. The suction plate 4 suctions the film sheet 6 placed on the tray 5 and waits at the position shown in FIG. 1.2 for the next temporary fixing. On the other hand, the temporarily fixed toner container 2 is transported together with the jig 1 to station S2.

At station S2, when the temporarily fixed toner container 2 is conveyed, the sealer 7 starts to descend. When the sealer 7 is lowered to the position shown in FIG. 5, the contact portion 24 of the elastic member 22 comes into contact with the leading end 6b of the film sheet 6 on the sheet holder lb. When the sealer 7 further descends, the contact portion 24 of the elastic member 22
is shifted in the direction of arrow B, and the film sheet 6 is stretched in the direction of arrow B.

Further, when the sealer 7 is lowered to the position shown in FIG. 6, the film sheet 6 is pressed against the tray sealing surface 2a by the heating bar 20 of the sealer 7 while being stretched, and welding is performed. That is, the toner container 2 is sealed with the film sheet 8, as shown in FIG. When the seal is completed, the sealer 7 rises and waits at the position shown in FIG. 1 to perform the next seal.

In this way, since the film sheet 6 is pulled by the contact portion 24 of the elastic member 22 and then welded to the sealing surface 2a by the heating bar 20, wrinkles do not occur in the film sheet 6. Because wrinkles do not occur,
Creases do not occur in the film sheet due to wrinkles, internal instruments do not leak from the creases, and the appearance is improved.

In the above embodiment, the sealing of the rectangular toner container 2 has been described, but it is also possible to seal a circular jelly container 40 filled with jelly or the like, as shown in FIG. 8, for example. In this case, the contact portions 24 of the plurality of elastic members 22 may be arranged so as to contact the sealing surface 40a, and the film sheet 41 may be pulled radially.

[Effects of the Invention] As explained above, according to the present invention, it is possible to seal the film sheet without causing wrinkles. Also,
Since wrinkles do not occur, creases do not occur in the film sheet due to wrinkles, and the contents do not leak from the creases. It also looks better.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram schematically showing the overall configuration of the sealing device, Fig. 2 is an explanatory diagram showing the state when the film sheet sucked by the suction plate is placed on the container, and Fig. 3 is , a bottom view showing the lower surface of the suction plate, FIG. 4 is an explanatory diagram showing the state when temporarily fixing the film sheet, FIG. 5 is an explanatory diagram when pulling the film sheet by lowering the seal bar, Fig. 6 is an explanatory diagram when welding the film sheet, Fig. 7 is a perspective view showing the toner container with the film sheet sealed, Fig. 8 is a perspective view showing the jelly container, and Fig. 9 is the conventional It is an explanatory view showing punching of the seal of. 22,...Elastic member (tensile member)

Claims (2)

[Claims] (1) The container has an opening at the top and a sealing surface is formed around the opening, and each time the container filled with contents is transported, a film sheet is placed to cover the opening of the container. A sealing bar equipped with a heating bar and waiting above the container on which the film sheet is placed is lowered, and the heating bar of the sealing bar presses the film sheet placed on the container against the sealing surface. This is a sealing method in which the film sheet is welded and sealed, and when the film sheet is placed on the container, one end of the film sheet is temporarily secured, and the lowering of the seal bar is used to seal the temporarily secured film sheet. A sealing method characterized in that the film sheet is welded and sealed by pulling the other end. (2) The container has an opening at the top and a sealing surface is formed around the opening, and each time the container filled with contents is transported, a film sheet is placed to cover the opening of the container. A sealing bar equipped with a heating bar and waiting above the container on which the film sheet is placed is lowered, and the heating bar of the sealing bar presses the film sheet placed on the container against the sealing surface. The sealing device performs welding and sealing while the film sheet is placed in the container, and is provided with a temporary fixing means for temporarily fixing one end of the film sheet when the film sheet is placed on the container, and the other end of the temporarily fixed film sheet is provided. A sealing device characterized in that the seal bar is provided with a tension member that pulls the seal bar when the seal bar descends.