JP6207262B2 - Sealing device for thin wall containers - Google Patents

Description

The present invention relates to a sealing device for a thin-walled container such as an egg container in which a body part and a lid part formed with a plurality of recesses for containing eggs are integrally connected via a flexible connecting part.

As shown in the perspective view of FIG. 9, the conventional egg container 9 includes a body part 91, a lid part 93, and these 2 parts.
It consists of a hinge part 95 that flexibly connects the two parts 91 and 93, and a synthetic resin sheet is integrally formed by vacuum molding or blow molding. The body part 91 and the lid part 93 are partitioned by a partition wall. Recesses 96, 97 and flanges 92, 94 for receiving a plurality of eggs prepared are formed.

Using such a conventional egg container 9, eggs are put in the respective concave portions 96 of the body portion 91, and then a lid portion 93 is folded on the body portion 91, and the overlapping flanges 92 and 94 are formed in a V shape. The pressure-sensitive adhesive tape that has been folded is pressed and bonded, and the adhesive tape is protruded from the end of the egg container 9 with one end of the adhesive tape being overlapped.

A device configured to peel off the adhesive tape from the flanges 92 and 94 and easily open it by pinching the end of the protruding adhesive tape with a fingertip and pulling it laterally is disclosed in Patent Document 1 below. ing.

The egg container sealing device disclosed in the following Patent Document 1 is placed on the side of this conveyor and a conveyor that carries the egg container while carrying the egg into the body part of the egg container and holding the lid part. A reel of adhesive tape, a roller for guiding the adhesive tape from the reel to the side of the conveyor, a fixed guide having a V-shaped tape guide surface, and a V-shaped with the fixed guide. A pair of press rollers for pressing the adhesive tape folded in the upper and lower sides of the egg container flange and a cutter for cutting the adhesive tape.

Further, a flange guide guide is provided for guiding the flange of the overlapped egg container to the adhesive surface of the adhesive tape bent into a V shape by a fixed guide.

Instead of a fixed guide having a V-shaped tape guide surface in this sealing device, it consists of a protruding ridge portion on the inlet side of an adhesive tape having a ridge line and an outlet groove portion having a valley line intersecting with the ridge line. A crease forming member that creases an adhesive tape is disclosed in Patent Document 2 below.

JP 2010-36957 A Japanese Patent No. 2537461

In such a sealing device for sealing using a conventional pressure-sensitive adhesive tape, when the egg container 9 containing the eggs is closed, the two flanges 92 and 94 overlap, and the two flanges 92 and 94 overlap. When the tip is first brought into correct contact with the valley of the adhesive surface of the adhesive tape bent into a V-shape, it adheres to the ends of the closed flanges 92 and 94 without gaps, as shown in the sectional view (a) of FIG. Tape 8 can be affixed.

However, in the apparatus disclosed in Patent Document 1, the fixed guide for bending the adhesive tape into a V shape and the flange guide guide for guiding the flanges 92 and 94 of the stacked egg container 9 to the adhesive surface of the adhesive tape are separated. Therefore, the tips of the flanges 92 and 94 of the closed egg container 9 are
The probability of hitting the valley line of the adhesive surface of the adhesive tape 8 is extremely low.

As described above, when the tips of the overlapping flanges 92 and 94 first come into contact with a position deviating from the valley of the adhesive surface of the adhesive tape 8, the position on the adhesive surface does not change thereafter. As shown in FIG. 2B, a portion 80 where the adhesive tapes 8 adhere from the ends of the closed flanges 92 and 94 protrudes.

Thus, if there is an adhesive portion 80 between the adhesive tapes 8, the effective adhesive area of the adhesive tape 8 that sticks to the closed flanges 92, 94 will be reduced. As shown in the cross-sectional view (c) of FIG. 10, the adhesive portion 80 between the adhesive tapes 8 may open, and subsequently the portion having a reduced effective adhesive area may be opened.

Patent Document 2 discloses a crease forming member that folds an adhesive tape composed of a protruding ridge portion on the inlet side of an adhesive tape having a ridge line and an outlet groove portion having a valley line that intersects with the ridge line. Has been. However, only a basic idea is disclosed, and a specific configuration for realizing it is not disclosed.

Therefore, the sealing device for a thin-walled container according to the present invention provides a sealing device in which the quality of the sealed state is significantly lowered depending on the position where the tips of the flanges 92 and 94 of the thin-walled container first contact the adhesive surface of the adhesive tape. It was thought to solve the problem.

The sealing device for a thin-walled container according to the present invention comprises a thin-walled container integrally formed with a body part, a lid part, and a hinge part that flexibly connects the two parts, and the body part and the lid part facing the hinge part. A device that overlaps flanges and seals with a pressure-sensitive adhesive tape, a triangular flat surface arranged on the entry side of the pressure-sensitive adhesive tape, a ridge having a ridge line obliquely intersecting the flat surface, and pressure-sensitive adhesive A V-shaped crease is applied to a pressure-sensitive adhesive tape comprising a groove having a valley line that intersects with the ridge line arranged on the outlet side of the tape, side walls provided on both sides of the flat surface and the convex line. A fold-forming member, a flange guide member that guides the tip of the overlapped flange toward the valley line of the adhesive tape that is folded into a valley shape by the fold-forming member, and a V-shaped shape by the fold-forming member. A creased feeling Sex adhesive tape, comprising a press roller to stick against the superposed above the flange, the spacing of the side walls provided on both sides of the ridge, the pressure-sensitive length along the surface of the convex portion The interval corresponding to the width of the adhesive tape is set .

According to the sealing device for a thin-walled container of the present invention, since the traveling direction of the adhesive tape is bent in the fold-forming member, the fold-forming member and the flange guide member that guides the flange of the stacked thin-walled container Can be approached. Therefore, it is possible to seal the end of the overlapping flange of the thin-walled container by abutting against the valley line of the adhesive tape.

  Thus, when the thin wall container is sealed with the pressure-sensitive adhesive tape, the effective pressure-sensitive adhesive area of the pressure-sensitive adhesive tape increases, so that the width of the pressure-sensitive adhesive tape to be used can be reduced.

The top view which shows embodiment of the sealing apparatus of the thin wall container of this invention, The perspective view which shows 1st Embodiment of the crease formation member in the sealing apparatus shown in FIG. Plan view, front view, left and right side views of the fold forming member shown in FIG. Sectional drawing cut | disconnected by the line ee and the line ff in the top view of FIG. The figure which shows 1st Embodiment of the flange guide member in the sealing apparatus shown in FIG. The perspective view which shows 2nd Embodiment of the fold formation member in the sealing apparatus shown in FIG. A plan view, a front view, left and right side views of the fold forming member shown in FIG. The figure which shows 2nd Embodiment of the flange guide member in the sealing apparatus shown in FIG. The perspective view which shows an example of the conventional egg container, It is sectional drawing for demonstrating the state which sealed the flange of the thin-walled container with the pressure sensitive adhesive tape.

(First embodiment)
As shown in the plan view of FIG. 1, the sealing device of the present invention places the egg container 9 while placing the eggs in the body portion 91 of the egg container 9 and holding the lid portion 93 with a lid holding member (not shown). Conveyer 5, the crease forming member 1 for folding the adhesive tape 8 provided on the side of the conveyer 5 into a V shape at the center line, and the tips of flanges 92 and 94 overlapped with the lid closed A flange guide member 2 that guides the fold forming member 1 to the valley line 17, a pair of upper and lower press rollers 3 that press the adhesive tape 8 guided to the flanges 92 and 94 of the egg container 9 from above and below, and an adhesive A cutter 4 for cutting the tape 8 and a flanged roller 82 for supplying the adhesive tape 8 from the reel 81 to the crease forming member 1 are provided.

The other side of the conveyor 5 is pressed from the hinge side of the egg container 9 containing the eggs so that the flanges 92 and 94 of the egg container 9 are connected to the flange guide member 2, the crease forming member 1 and the press roller 3.
And a pressing member 6 that is pressed against.

The crease forming member 1 is a ridge having ridgelines 12 as shown in the perspective view of FIG. 2 and the front view (a), plan view (c), and left and right side views (b) and (d) of FIG. Part 11 and a V-shaped groove part 16 having a valley line 17 following ridge line 12, convex part 11 is arranged on the inlet side of the adhesive tape, and groove part 16 is the outlet side of the adhesive tape. The ridge line 12 of the ridge portion 11 and the valley line 17 of the groove portion 16 intersect with each other.

The fold forming member 1 is arranged so that the direction of the valley line 17 of the groove portion 16 is parallel to the conveying direction of the egg container 9.

The appropriate crossing angle between the ridge line 12 and the valley line 17 of the crease forming member 1 is determined by trial because it is determined by the material and thickness of the support film used for the adhesive tape 8 and the tension of the adhesive tape to be fed out. .

On the supply side of the ridge portion 11 having the ridgeline 12, a triangular flat surface 13 is formed in which the back surface of the adhesive tape (the support film side supporting the adhesive layer) slides toward the ridgeline 12. The flat surface 13 intersects the ridgeline 12 obliquely at the apex.

When the adhesive tape 8 is supplied to the ridge portion 11 having the ridge line 12, the adhesive tape 8 slides sideways, and the center line of the adhesive tape 8 deviates from the ridge line 12 of the ridge portion 11, so that the flat surface 13 and the ridge portion Side walls 14 and 14 for guiding the adhesive tape are provided on both sides of 11.

When the adhesive tape 8 runs while sliding on the triangular flat surface 13 and the surface of the ridge 11, the interval between the side walls 14, 14 is adjusted to the width of the adhesive tape as shown in the sectional view (e) of FIG. 4. If the width T is set to a certain width T, it will pass correctly at the entrance of the flat surface 13, but if it proceeds on the ridge 11 having the ridgeline 12, as shown in the sectional view (g) of FIG. Since the width along the surface of the portion 11 is wider than the width of the adhesive tape, as shown in the cross-sectional view (h) of FIG. A portion 81 is formed, and the center line of the adhesive tape 8 may deviate from the ridge line 12.

Therefore, in order to match the width of the adhesive tape along the surface of the ridge 11, as shown in the perspective view of FIG. 2 and the cross-sectional view (f) of FIG. The bulging portions 15 and 15 are provided so as to narrow the interval of 14 so that the interval t (t <T) is satisfied.

By configuring the side walls 14 and 14 and the bulging portions 15 and 15 in this way, the center line of the supplied adhesive tape 8 can be guided onto the ridge line 12 of the ridge 11.

V-shaped ridgelines 18 and 18 formed at a portion where the ridge 11 and the groove 16 intersect, the ridge 11
The ridgeline 12 and the valley line 17 of the groove 16 are concentrated at one point. The ridge lines 18 and 18 at the concentrated point 19 can be continuously bent from a mountain shape to a valley shape while changing the conveyance direction of the adhesive tape 8.

Thus, when the adhesive tape 8 is deformed from a mountain shape to a valley shape, the adhesive tape 8 rubs the entire width of the V-shaped ridge lines 18 and 18, so that the frictional force does not concentrate on a part of the adhesive tape 8. , Can be smoothly deformed from Yamagata to Valley. In this way, a V-shaped fold can be formed on the adhesive tape 8 without touching the adhesive surface.

A flange guide member 2 is provided for guiding the tips of the flanges 92 and 94 of the egg container 9 that are overlapped to the valley line of the adhesive tape 8 that is bent into a valley shape by the crease forming member 1.

As shown in the front view (a) and the plan view (b) of FIG. 5, the flange guide member 2 has two pieces narrower than the flanges 92 and 94 of the egg container 9 on the surface of the rectangular metal plate 21. Metal strip
22 is planted. These two strips 22 are planted so that the distance between them is narrowed toward the tip, and the tip 23 projects from the end of the rectangular metal plate 21, and the groove portion of the crease forming member 1. It has grown to 16.

The front end 23 of the flange guide member 2 is narrowed so that the front end 23 protruding from the rectangular metal plate 21 does not touch the adhesive surface of the adhesive tape in the groove 16 of the crease forming member 1. ing.

The surface of the rectangular metal plate 21 is on the extended line of the valley line 17 of the groove portion 16 of the crease forming member 1, and the crease is formed by sliding the ends of the flanges 92 and 94 of the egg container 9 against each other. It leads to the member 1 and the press roller 3.

In order to make it convenient for repairing the entangled adhesive tape 8 or replacing the adhesive tape 8, the rear end of the rectangular metal plate 21 is attached to the base 7 via a hinge 24, and the rectangular metal plate 21 The vicinity of the tip is configured to be attracted by a magnet 25 provided on the base.

When repairing the state of the adhesive tape 8, as shown by the dotted line in the plan view (b) of FIG. 5, if the vicinity of the tip of the flange guide member 2 is pulled away against the attractive force of the magnet 25 with the fingertip, Eye forming member 1
It is possible to move away from the vehicle, and repair work can be easily performed. Rectangular metal plate 21
As a means for fixing or releasing the base plate to the base, a patchon lock or the like can be used instead of the magnet 25.

(Second Embodiment)
In the first embodiment described above, on the supply side of the ridge portion 11 of the crease forming member 1,
A triangular flat surface 13 in which the back surface of the adhesive tape slides toward the ridgeline 12 is formed partway along the ridge 11.

In the second embodiment, a perspective view of FIG. 6, a front view (a) of FIG. 7, and a plan view (c)
), Left and right side views (b) and (d), a triangular flat surface 13 is formed into V-shaped ridge lines 18, 18 as shown in FIG.
The ridgeline 12 (see FIG. 2) is shortened and extended to the intersection 19 of FIG.

However, as is apparent from the front view (a) and the right side view (d) of FIG. 7, the portions 11a and 11a of the two surfaces forming the ridges remain to form V-shaped ridge lines 18 and 18, respectively. The V-shaped ridgelines 18 and 18 are the same as the V-shaped ridgelines 18 and 18 in the first embodiment.

V-shaped ridgeline 18 formed at a portion where the protrusions 11a, 11a and the groove 16 intersect.
, 18, the valley line 17 of the groove 16 is concentrated at one point. At this concentrated point 19, the ridge line 12 of the ridge
Even if there is no, it can be continuously bent from a mountain shape to a valley shape while changing the conveyance direction of the adhesive tape 8 as in the first embodiment.

Thus, when the adhesive tape 8 is deformed from a mountain shape to a valley shape, the adhesive tape 8 rubs the entire width of the V-shaped ridge lines 18 and 18, so that the frictional force does not concentrate on a part of the adhesive tape 8. , Can be smoothly deformed from Yamagata to Valley. In this way, a V-shaped fold can be formed on the adhesive tape 8 without touching the adhesive surface.

When the adhesive tape 8 travels while sliding on the triangular flat surface 13 and the surfaces of the protrusions 11a and 11a, the interval between the side walls 14a and 14a is set to a constant width T according to the width of the adhesive tape. ,
It passes correctly at the entrance of the triangular flat surface 13, but when it moves over the triangular flat surface 13 and the ridge portions 11 a, 11 a, the surface of the flat surface 13 and the ridge portions 11 a, 11 a Is wider than the width T of the pressure-sensitive adhesive tape, the pressure-sensitive adhesive tape may slip sideways, and the center line of the pressure-sensitive adhesive tape may deviate from the concentration point 19.

Therefore, as shown in the perspective view of FIG. 6, the front view (a), and the right side view (d) of FIG. 7, the width along the surface of the triangular flat surface 13 and the portions 11a and 11a of the ridges is set. In order to match the width of the adhesive tape, the side wall 14a at the portion sandwiching the triangular flat surface 13 and the protruding strips 11a, 11a.
, 14a is set so as to be continuously narrowed from T to t (t <T).

(Third embodiment)
In the flange guide member 2 in the first embodiment, two metal strips 22 narrower than the widths of the flanges 92 and 94 of the egg container are implanted on the surface of the rectangular metal plate 21. This third
In this embodiment, as shown in FIG. 8, a channel having a V-shaped cross section is used instead of the two metal strips 22.

As shown in the sectional view (c) taken along the line cc of the front view (a) of FIG. 8, the flange guide member 2 is a channel 26 having a V-shaped sectional shape, and a trough line of the channel 26 The flange guide member 2 is arranged so that the valley line 17 of the groove portion 16 of the crease forming member 1 forms the same straight line.

And since the conveyance direction of the adhesive tape 8 changes in the crease formation member 1, it is possible to make the front-end | tip of the flange guide member 2 remarkably approach the trough line 17 of the crease formation member 1, and the flange 92 of the egg container 9 , 94 can be guided to the valley line of the adhesive tape 8.

The rear end of the flange guide member 2 is attached to the base 7 via a hinge 24 so that it can be conveniently used for repairing the entangled adhesive tape 8 or replacing the adhesive tape 8, and the vicinity of the front end of the flange guide member 2 Is attracted to a magnet 25 provided on the base 7.

When repairing the state of the adhesive tape 8, as shown by the dotted line in the plan view (b) of FIG. 8, if the vicinity of the tip of the flange guide member 2 is pulled away against the attractive force of the magnet 25 with the fingertip, Eye forming member 1
It is possible to move away from the vehicle, and repair work can be easily performed.

And with the tips of the flanges 92 and 94 of the egg container 9 adhered to the valleys of the adhesive tape,
A pair of press rollers 3 are pressed from above and below and sealed.

The ends of the adhesive tape 8 sealed with the pair of press rollers 3 are cut by the cutter 4, and the egg container sealed with the eggs is discharged by the conveyor 5.

In the embodiment described above, the sealing of the egg container has been described, but the present invention can also be applied to other thin-walled containers having flanges on the body part and the lid part.

1 Fold forming member
11 Convex section
12 Ridge line
13 Flat surface
14 Side wall
15 bulge
16 Groove
17 Valley Line
18 V-shaped ridgeline 2 Flange guide member 3 Press roller 4 Cutter 5 Conveyor 6 Pressing member 7 Base 8 Adhesive tape 9 Egg container

Claims (2)

The body part, the lid part, and a thin wall container integrally formed with a hinge part that flexibly connects these two parts are sealed with a pressure-sensitive adhesive tape by overlapping the body part and the flange part of the lid part facing the hinge part. A triangular flat surface arranged on the entry side of the pressure-sensitive adhesive tape, a ridge having a ridge line obliquely intersecting the flat surface, and the ridge line arranged on the outlet side of the pressure-sensitive adhesive tape A crease forming member for forming a V-shaped crease on a pressure-sensitive adhesive tape comprising a groove having crossed valley lines, side walls provided on both sides of the flat surface and the convex part, and the overlapped flange The flange guide member which leads the tip of the tape toward the valley line of the pressure-sensitive adhesive tape bent in a valley shape by the crease forming member, and the pressure-sensitive adhesive having a V-shaped crease by the crease forming member The tape is overlapped And and a press roller to stick against the above flange, the spacing of the side walls provided on both sides of the ridge, the length along the surface of the convex portion corresponds to the width of the pressure-sensitive adhesive tape A sealing device for thin-walled containers, characterized in that the interval is set .   2. The sealing device for a thin-walled container according to claim 1, wherein the flat surface of the triangle is enlarged until the apex of the flat surface of the triangle becomes the starting point of the valley line of the groove.

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