JP2008037489A - Sealing method and its sealing device for packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve users' usability without increasing manufacturing cost. <P>SOLUTION: Joint strips 22 and 23 of a packaging box 15 are joined to seal the opening of the packaging box 15 by moving a pressure member 6A in a direction indicated by an arrow B and moving a pressure member 6B in a direction indicated by an arrow A. A pressure piece 40 formed of a heat resistant rubber is fixed on the pressure faces of a fold-forming pressure part 14A and 14B for forming a folding part 31 of the packaging box 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a packaging box that seals an opening by joining a pair of joining pieces provided in the opening while folding inwardly a folding portion provided in an edge of the opening of the packaging box formed in a rectangular tube shape. The present invention relates to a sealing method and a sealing device thereof.

  3 to 7 are views for explaining a conventional packaging box sealing method, in which FIG. 3 is a side view of the packaging box sealing device, and FIG. 4 is a state in which an article to be packaged is inserted into the packaging box. 5A is a perspective view of a main part showing a sealed state, FIG. 5B is a perspective view of a main part showing a sealed state, and FIG. 6A is a packaging box. The side view which shows the state which inserted the to-be-packaged goods in the inside, the same figure (B) is a side view which shows the state which sealed the packaging box, FIG. 7 is the front view which shows the state which sealed the packaging box.

  A packaging box sealing device generally indicated by reference numeral 1 in FIG. 3 includes a frame 4 attached to a base plate 2 via a base 3, a pair of air cylinders 5A and 5B attached to the frame 4, and these The air cylinders 5A and 5B are generally composed of a pair of pressing members 6A and 6B that move in the arrow AB direction. The air cylinders 5A and 5B are attached to the outer surfaces of the left and right side plates 7A and 7B of the frame 4 so as to face each other, and the rods 8A and 8B face the inner sides of the left and right side plates 7A and 7B. Yes.

  Press members 6A and 6B are attached to the rods 8A and 8B of the air cylinders 5A and 5B so as to face each other. The press members 6A and 6B are linear guides provided on the upper plate 9 of the frame 4. It moves in the direction of arrow AB through each of the ten moving bodies 11A and 11B. The pressing members 6A and 6B are provided with pressing blocks 12A and 12B facing each other, and heaters (not shown) for heating the pressing blocks 12A and 12B are embedded in the pressing blocks 12A and 12B, respectively. Has been. Further, the pressing blocks 12A and 12B include bonding piece pressing portions 13A and 13B formed in a flat shape in a side view, and folding portion forming pressing portions 14A and 14B connected to the pressing blocks 12A and 12B and formed in a tapered shape in a side view. And are provided.

  The packaging box generally indicated by reference numeral 15 in FIG. 4 has openings 20 and 21 at both upper and lower ends and is formed in a square tube shape by four side portions 16 to 19. A pair of joining pieces 22 and 23 are integrally provided so as to face each other from the edge of the opening 21. An adhesive (not shown) that melts when heated is applied to the opposing surfaces 22a and 23a of the joining pieces 22 and 23 that face each other, and the joining pieces 22 and 23 and the side portions 16 and 18 Folds 24 and 25 are provided at the boundary. Reference numeral 26 denotes a bottom portion closing the lower opening 20, and a perforation 27 (see FIG. 6A) is provided at the boundary with the lower end of the side portion 16, and the bottom portion 26 is forced by a finger. By pulling in the direction of arrow C, the bottom 26 is peeled off from the perforation 27 and the opening 20 is opened.

  Three fold lines 28, 29, and 30, which form isosceles triangles, are provided at the ends of the side parts 17 and 19 facing each other on the opening 21 side (the fold lines on the side part 19 side are not shown). A portion 31 surrounded by the folds 28, 29, and 30 forms a folding portion that is folded inside the packaging box 15 when the joining pieces 22 and 23 are joined as will be described later. The portions 32 and 33 on both sides of the folding portion 31 are folded inside the packaging box 15 when the folding portion 31 is folded, and the inner surfaces of the upper portions 16a and 18a of the side portions 16 and 18 (see FIG. 6A). The folding part which contacts is formed. Reference numeral 34 denotes a fold provided in the side portions 16 and 18 (the fold 34 in the side portion 18 is not shown), and is connected to the fold 28.

  In FIG. 4, reference numeral 35 denotes a packaged product to be inserted into the packaging box 15, and the packaged product 37 is covered with a transparent sheet 36, and the thermocompression bonding part 36 a is obtained by thermocompression bonding of both ends of the sheet 36. , 36a, the package 37 is sealed.

  Next, a method of sealing the packaged product 35 in the packaging box 15 in the packaging box sealing apparatus having such a configuration will be described. First, as shown in FIG. 4, the packaged product 35 is dropped by its own weight and stored in the packaging box 15 from the opening 21 of the packaging box 15. As shown in FIG. 6A, the packaged product 35 stored in the packaging box 15 and placed on the bottom 26 has a part of the thermocompression bonding part 36 a of the sheet 36 facing the folding part 32.

  In this state, by positioning the joining pieces 22 and 23 of the packaging box 15 between the pair of pressing members 6A and 6B of the packaging box sealing device 1 as shown in FIG. 3 and operating the air cylinders 5A and 5B, The pressing member 6A is moved in the arrow B direction, and at the same time, the pressing member 6B is moved in the arrow A direction. By this movement, the pressing portion 13A for the joining piece of the pressing member 6A comes into contact with the joining piece 22 of the packaging box 15, and the pressing portion 14A for forming the folding portion comes into contact with a part of the upper portion 16a of the side portion 16 and presses. The joining piece pressing portion 13B of the member 6B is in contact with the joining piece 23 of the packaging box 15, and the folding portion forming pressing portion 14B is in contact with a part of the upper portion 18a of the side portion 18.

  Furthermore, when the pressing member 6A is moved in the direction of arrow B and simultaneously the pressing member 6B is moved in the direction of arrow A, the joining piece 22 is pressed in the direction of arrow B as shown in FIG. 23 is pressed in the direction of the arrow A, and the joint pieces 22 and 23 move so as to approach each other. At this time, the upper portion 16a of the side portion 16 is pressed in the arrow B direction by the folding portion forming pressing portion 14A, and the upper portion 18a of the side portion 18 is pressed in the arrow A direction by the folding portion forming pressing portion 14B. By this pressing, the folding parts 31 and 31 of the side parts 17 and 19 (the folding part 31 of the side part 19 is not shown) are folded inside the packaging box 15 along the fold lines 29 and 30, and the folding part 32 33 are also folded inside the packaging box 15.

  Further, when the pressing member 6A is moved in the arrow B direction and at the same time the pressing member 6B is moved in the arrow A direction, the joining pieces 22 and 23 come into contact with each other as shown in FIG. At this time, the joining pieces 22 and 23 are heated by the heaters in the pressing blocks 12A and 12B of the pressing members 6A and 6B, so that the adhesive applied to the opposing surfaces 22a and 23a is melted to join the joining pieces 22 and 23. 23 is joined, and the upper opening 21 of the packaging box 15 is sealed.

  In the conventional packaging box sealing method described above, since the opening 21 of the packaging box 15 is sealed with a part of the thermocompression bonding part 36a of the sheet 36 facing the folding part 32, the thermocompression bonding part. 6A and 7B, 36a may be sandwiched between the folded portion 32 folded into the packaging box 15 and the upper portion 16a of the side portion 16 (hatching is shown in FIG. 7 for convenience). Marked part). In this way, when the thermocompression bonding part 36a is sandwiched, the bottom 26 of the packaging box 15 is opened by a finger, and the packaged product 35 does not fall by its own weight even when the opening 20 of the packaging box 15 is opened. In some cases, the box 15 may remain stored. In such a state, since it becomes difficult to take out the packaged product 35 from the packaging box 15, there is a problem that the user's usability is deteriorated. In order to solve this problem, as shown in FIG. 8, the packaged product 35 accommodated in the packaging box 15 is pushed in by the push rods 38, 38 inserted into the packaging box 15 from the opening 21, and the sheet 36 is thermocompression bonded. After the part 36a does not face the folding part 32, a part 39 of the joining pieces 22 and 23 is temporarily sealed, and then the push rods 38 and 38 are removed from the packaging box 15 and the joining pieces 22 and 23 are removed. The main seal was made. However, this method requires an insertion and extraction process of the push rod 38 and a temporary sealing process, which not only increases the number of processes and the manufacturing cost, but also increases the number of parts for configuring the apparatus. As a result, there has been a problem that the failure rate of the apparatus becomes high.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to improve the user-friendliness without increasing the manufacturing cost.

  In order to achieve this object, the invention according to claim 1 is a sealing of a packaging box that seals the opening by sandwiching the opening of the packaging box formed by four side portions into a rectangular tube shape by a pair of pressing members. A method of stopping, wherein the packaging box is provided with a pair of opposing joining pieces projecting from the end edges of two of the four side parts, and the other of the four side parts. A folding part that is folded inside the packaging box is provided on two side parts, and when the joining piece is pressed and joined by the pressing member, the side part from which the joining piece protrudes is also pressed and the folding part Is to be plastically deformed.

  The invention according to claim 2 is a packaging box sealing device having a pair of pressing members for sealing an opening of a packaging box formed in a square tube shape by four side portions, A pair of opposing joining pieces projecting from the edges of two of the four side portions are provided, and the other two side portions of the four side portions are folded inside the packaging box. For forming a folding part that presses the side part on which the joining piece protrudes and presses the joining part, presses the joining piece to the pressing member, and folds the folding part. A pressing portion is provided, and an elastic member is provided on the pressing surface of the folding portion forming pressing portion.

  According to the present invention, since a gap is formed between the folding part and the side part when the opening of the packaging box is sealed by plastically deforming a part of the folding part, the folding part and the side part A part of the packaged product is not sandwiched between the two. For this reason, opening the bottom of the packaging box causes the packaged item to fall from the bottom of the packaging box due to its own weight, so the packaged item does not remain in the packaging box. Usability is improved.

  According to the second aspect of the present invention, the printing applied to the surface of the packaging box is not peeled off or scratched by pressing the surface of the packaging box with the elastic member. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A is a side view showing the main part of the packaging box sealing device according to the present invention, FIG. 1B is a cross-sectional view taken along line I (B) -I (B) in FIG. These are sectional drawings of the principal part for demonstrating the clearance gap formed between a folding part and a side part when sealing similarly. In these drawings, the same or equivalent members described in the prior art shown in FIGS. 3 to 7 described above are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

  The feature of the present invention is that the pressing piece 40 as an elastic member made of heat-resistant rubber formed in a long and thin piece on the pressing surfaces of the folding portion forming pressing portions 14A and 14B of the pair of pressing members 6A and 6B. , 40 is fixed. As shown in FIG. 2B, the pressing pieces 40, 40 are provided over the entire width direction of the pressing blocks 12A, 12B, and the length L1 in the width direction is the length L2 in the width direction of the packaging box 15. It is formed larger than.

  In the apparatus configured as described above, as shown in FIG. 1A, the pressing member 6A is moved in the arrow B direction, the pressing member 6B is moved in the arrow A direction, and the joining pieces 22 and 23 of the packaging box 15 are moved. Join. At this time, the pressing pieces 40, 40 press the upper portion 16 a of the side portion 16 of the packaging box 15 in the arrow B direction in FIG. 2 and press the upper portion 18 a of the side portion 18 in the arrow A direction. Therefore, the folding part 31 folded into the packaging box 15 via the upper surfaces 16a and 18a is also pressed in the direction of the arrow B in the folding part 32 side, and pressed in the direction of the arrow A in the folding part 33 side.

  That is, since the force along the surface direction of the folding part 31 is applied to the folding part 31 by the pressing pieces 40, 40, the folding parts 32, 33 are plastic so as to exhibit a curved shape toward the inside of the folding part 31. It becomes easy to deform. On the other hand, since the upper surfaces 16a and 18a are pressed in a direction perpendicular to the surface direction of the upper surfaces 16a and 18a, they are easily elastically restored when the pressing by the pressing piece 40 is released after being temporarily elastically deformed. Therefore, after releasing the pressing by the pressing piece 40, a gap is formed between the upper portion 16 a of the side portion 16 and the folding portion 32 and between the upper portion 18 a of the side portion 18 and the folding portion 33. For this reason, the force which clamps the thermocompression-bonding part 36a by the upper part 16a and the folding part 32 or the upper part 18a and the folding part 33 becomes relatively small compared with the conventional case mentioned above.

  Therefore, even if the opening 21 of the packaging box 15 is sealed with the thermocompression bonding part 36a of the packaged product 35 temporarily entering between them, the packaged product 35 is opened when the opening 20 of the packaging box 15 is opened. Falls from the opening 20 of the packaging box 15 by its own weight, so that it is not difficult for the user to take out. Moreover, in order to form a gap between the upper portion 16a of the side portion 16 and the folding portion 32 and between the upper portion 18a of the side portion 18 and the folding portion 33, the pressing portions 13A and 13B for pressing the fold portion are pressed. It is only necessary to provide the piece 40. Since the number of steps required for sealing does not increase, the manufacturing cost can be reduced.

  Further, since the pressing piece 40 that presses the upper portions 16a and 18a of the side portions 16 and 18 is formed of an elastic member, the printing applied to the surface of the packaging box 15 by the pressing piece 40 is peeled off or scratched. There is no such thing. Further, since the length L1 in the width direction of the pressing piece 40 is formed larger than the length L2 in the width direction of the packaging box 15, the pressing piece 40 does not partially press the packaging box 15. Further, the printing applied to the surface of the packaging box 15 is not peeled off or scratched.

  In the present embodiment, the pressing piece 40 is formed of heat resistant rubber. However, when the joining pieces 22 and 23 do not need to be heated, they do not necessarily have a heat resistant function. The material is not limited to rubber and may be elastically deformed. In short, the material printed on the surface of the packaging box 15 is not peeled off or scratched. That's fine.

FIG. 1A is a side view showing the main part of the packaging box sealing device according to the present invention, and FIG. 1B is a cross-sectional view taken along line I (B) -I (B) in FIG. In the method of sealing the packaging box which concerns on this invention, it is sectional drawing of the principal part for demonstrating the clearance gap formed between a folding part and a side part when it seals. It is a side view of the conventional packaging box sealing device. It is a perspective view which shows the state which inserts a to-be-packaged product in a packaging box. FIG. 4A is a perspective view of a main part showing a state where the packaging box is sealed, and FIG. 4B is a perspective view of the main part showing a sealed state. FIG. 4A is a side view showing a state in which an article to be packaged is inserted into the packaging box, and FIG. 4B is a side view showing a state in which the packaging box is sealed. It is a front view which shows the state which sealed the packaging box. It is a schematic diagram which shows the other example in the conventional method of sealing a packaging box.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Packaging box sealing device, 6A, 6B ... Pressing member, 13A, 13B ... Joining piece pressing part, 14A, 14B ... Folding part forming pressing part, 15 ... Packaging box, 31 ... Folding part, 35 ... Package 36a ... thermocompression bonding part, 40 ... pressing piece.

Claims (2)

  A packaging box sealing method for sealing an opening by sandwiching an opening of a packaging box formed by four side portions into a rectangular tube shape by a pair of pressing members, the packaging box having four side portions A pair of opposing joining pieces projecting from the edges of two of the side parts are provided, and a folding part that is folded inside the packaging box is provided on the other two side parts of the four side parts. And sealing the packaging box, wherein when the joining piece is pressed and joined by the pressing member, the side portion on which the joining piece protrudes is also pressed to plastically deform a part of the folding portion. Stop method.   A packaging box sealing device having a pair of pressing members for sealing an opening of a packaging box formed into a rectangular tube shape by four side portions, and the packaging box includes two of the four side portions. A pair of opposing joining pieces projecting from the edge of one side part and a folding part that is folded inside the packaging box on the other two side parts of the four side parts, The member is provided with a joining piece pressing portion that presses and joins the joining piece, and a folding portion forming pressing portion that presses the side portion on which the joining piece protrudes and folds the folding portion. A packaging box sealing device comprising an elastic member on a pressing surface of a pressing portion for forming a portion.

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