JPH0627564Y2 - Packaging container lid structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a lid for a packaging container, and is particularly suitable for automatically taking out one by one from a large number of lids that are stacked and conveying the lid. Related to a simple lid structure.

[Prior Art] As a conventional lid structure for a packaging container, for example, there is one as shown in FIGS. 8 and 9.

In this device, the inside of a lid 1 made of a sheet material formed in a square shape is swollen to the one surface side, so that a swollen portion 2 is formed on the one surface side and a recessed portion 3 is formed on the multifaceted side. ing. The bulging portion 2 is composed of a bottom piece having a square shape and a peripheral surface piece continuous to its four sides. The peripheral surface piece is provided with a taper so that the concave portion has an inverted pyramid shape, and another lid is provided in the concave portion 3. The bulging portion 2 is configured to be fittable, and a large number of lids can be stacked and stored.

When the lids having such a configuration are accommodated in a magazine or the like in the above-mentioned stacked state and taken out one by one in an automatic packaging line or the like, for example, suction is taken out by a vacuum device from the take-out side.

[Problems to be Solved by the Invention] However, in the above-described conventional lid structure, when two lids are overlapped with each other, they are in contact with each other over substantially the entire surface, so that the two lids are in surface contact with each other. Due to the contact frictional resistance caused by the above, peeling becomes difficult, and there is a problem that a plurality of lids are often taken out from a magazine or the like at the same time when sucked by a vacuum device.

In order to solve such a problem, conventionally, an air discharge nozzle is exposed to the side of the passage of the lid, and high-pressure air is blown laterally from the contact portion to form an air layer between the lids. Peeling is performed for each sheet.

However, when the two lids are in close contact with each other without a gap or when the gap between the lids is extremely narrow, air cannot be introduced between the lids, and thus the lids cannot be separated one by one. However, there is a problem that it is difficult to achieve high-speed processing in the packaging process and the like.

The present invention has been made in view of such a conventional problem, and provides an uneven portion in which a convex portion is formed on one surface side and a concave portion is formed on the other surface side, and the uneven portion is uneven on another lid. It is an object of the present invention to solve the above-mentioned problems by providing a structure that can be fitted to a part only at one place.

[Means for Solving the Problem] In order to achieve the above object, the packaging container lid structure of the present invention has a peripheral surface piece and a bottom surface piece by bulging one side of a sheet material or a plate material. A lid for a packaging container having a pyramidal bulging portion, which is a convex portion on the one surface side of the bulging portion in the vicinity of the boundary line of the bottom surface piece with the peripheral surface piece or at the boundary line portion. Are formed on the other surface side, and concave and convex portions are formed on the other surface side to form concave portions to be fitted to the convex portions, and these concave and convex portions are located at the same phase as the concave and convex portions of another same lid that is overlapped. In order to be able to fit only in, the entire length of the concavo-convex part forming part of each side is made the same and the setting position of the discontinuous part is changed, or the length per piece is made equal and the setting position is changed. I am trying.

[Operation] Since the uneven portion provided on the lid is arranged so that it can overlap with the uneven portion provided on the other lid only at one place,
By overlapping the two lids in a state in which the lids are rotationally displaced and displaced from each other, the uneven portions of the lids stacked on top of each other deviate from the uneven portions of the lid located below and the respective concave portions and convex portions are overlapped. Disappear. As a result, a gap is generated between the two lids, and the contact portion between the both lids is only the contact portion of the convex portion, so that the contact frictional resistance between the both lids can be significantly reduced. The stacked lids can be easily peeled off one by one.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 4 are views showing an embodiment of the present invention.

First, the structure will be described. In the figure, reference numeral 4 is a lid, which is formed in a square shape by using a sheet member made of a material such as plastic. The lid 4 has flanges 5 each having a predetermined width on all four sides, and the inside thereof is bulged to one surface side (the lower surface side in FIG. 2 and the like), so that the one surface bulging portion 6 is formed. And a concave portion 7 is formed on the other surface side.

The bulging portion 6 is a peripheral surface piece 6a having a taper inclined inward.
And a bottom piece 6b continuous with this, both pieces 6a, 6
In the space surrounded by b, a truncated pyramidal recess 7 is formed. The four corners of the bulging portion 6 and the recessed portion 7 are set with rounded corners corresponding to the inclination angles.

In addition, a specific example of a concavo-convex portion that extends in parallel with each boundary line N and bulges in the same direction as the bulging portion 6 in the vicinity of the inner side of the boundary line N with each peripheral surface piece 6a on the four sides of the bottom surface piece 6b. 4 sets of concavo-convex stripes 8, 9, 10 and 11 having the same total length are formed. The four sets of concave-convex strips 8 to 11 have a convex portion 12 formed on one bulging surface side and a concave portion 13 fitted to the convex portion 12 of another lid 4 on the other concave surface side. The arc-shaped cross-sectional shape is a gutter shape continuous in the longitudinal direction.

These four sets of concavo-convex strips 8 to 11 are set apart from the adjacent boundary line N by a constant distance T, and in the middle part in the longitudinal direction thereof, the four concavo-convex strips 8 to 11 are arranged. Discontinuous portions S are provided at positions different from each other. As a result, the four sets of uneven strips 8 to 11 are not aligned, and the other lid 4
When they are overlapped with each other, the concave and convex portions can be fitted only at one position where they do not rotate and change, that is, at one position in the same phase.

That is, the four sets of concave-convex strips 8 to 11 in this embodiment are set so as to have the following length relationship.

First uneven strip 8 = LA × 2 + S Second uneven strip 9 = LB1 × 2 + LB2 + S × 2 Third uneven strip 10 = LC1 × 2 + LC2 + S × 2 Fourth uneven strip 11 = LD1 + LD2 + S Uneven strip 8 = 9 = 10 = 11 = constant LB1 <LB2, LC1 <LC2, LD1 <LD2 LC1 <LB1 <LD1 <LA Next, the operation will be described.

FIG. 4 is a cross-sectional view showing a state in which the lid body 4 in the planar state shown in FIG. 1 and the same lid body 4 which is rotationally displaced by 90 degrees are overlapped with each other.

In this way, the positions of the lids 4 are displaced from each other, and the bulging portions 6 of the upper lid 4 are fitted into the recessed portions 7 of the lower lid 4 so that the two lids 4 are superposed. Then, for example, the fourth uneven strip 11 of the upper lid 4 comes to be located right above the first uneven strip 8 of the lower lid 4, and similarly when the position is shifted by 90 degrees, The concavo-convex stripes face each other.

As a result, as described above, the four sets of the uneven strips 8 to 11 are formed so that they can be fitted at only one place with the uneven strips of the other lid body 4 that are overlapped, and 90 from that position. When the two lids 4 are overlapped with each other while being rotationally displaced, the positions of the upper and lower discontinuities S are deviated, and the upper lid is always placed on each discontinuity S of the lower lid. The convex portion 12 comes to be located. For example, the convex portion 12 (LD2 portion) of the fourth concave-convex strip 11 is formed on one discontinuous portion S of the first concave-convex strip 8, and the two discontinuous portions S of the second concave-convex strip 9 are formed. The convex portions 12 (LA portions) of the first concave-convex stripes 8 are provided on the upper surface, and the convex portions 12 of the second concave-convex stripes 9 are formed on the two discontinuous portions S of the third concave-convex stripe 10. (LB1
Part), and the convex portion 12 (LC2 portion) of the third concave-convex strip 10 on the single discontinuous portion S of the fourth concave-convex strip 11.
Are located respectively.

For this reason, the upper lid 4 is replaced by the lower lid 4 as described above.
It is supported by a line contact for a short distance of the discontinuity S at a point. Therefore, the contact frictional resistance generated between the upper and lower lids 4 can be reduced as much as possible, and the stacked lids 4 can be easily separated one by one.

A second embodiment of the present invention is shown in FIGS.

In the present embodiment, unevenness steps 15 showing another example of unevenness that bulges into the recessed portion 14 are provided in the boundary line portion from the lower portion of the peripheral surface piece 16a to the outer end portion of the bottom surface piece 16b. By changing the set position while making the shape of the step 15 the same, a position where the two lids 4 are not rotationally displaced, that is, the same phase 1
It is designed so that it can be fitted only at points.

That is, the length L of the uneven steps 15 provided at two locations on each of the four sides is kept constant, and the distance T to the adjacent boundary line N is changed. Their distances T1, T2, T3 and T
4 is set to have the following relationship.

T1 <T2 <T3 <T4 T1 + L> T4 By setting such a length relationship, the uneven steps 15 can be slightly shifted and overlapped on the other three sides, and the height of the uneven steps 15 can be increased between the lids 4. It is possible to form a gap made of sand. Other configurations and operations are similar to those of the above-mentioned embodiment.

[Effects of the Invention] As described above, the present invention is configured as described above, and therefore has the following effects.

By rotating the same lids and stacking them by shifting their positions, a gap can be created between the lids, and the contact frictional resistance can be greatly reduced. Can be peeled off. Moreover, since an air jetting device or the like for peeling off the lid is not required,
As a result, the size of the entire apparatus can be reduced, and high-speed processing such as a packaging process can be realized.

In addition, since the arrangement position mode of the depressed portion of the molded product is different for each molding, it is not necessary to prepare many kinds of molds, and it is sufficient to prepare one mold. That is, there is an effect that the mold can be easily manufactured and the manufacturing cost of the mold and the molded product can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a sectional view taken along line III-III of FIG.
FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1 in a state where two lids are rotated and displaced by 90 degrees and overlapped, and FIG. 5 is a plan view showing a second embodiment of the present invention. FIG. 6 is a front view of the same, FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5, FIG. 8 is a plan view of a conventional lid, and FIG. 9 is taken along line XI-XI of FIG. FIG. 4, 21: Lid, 6, 22: Bulging part 7, 14, 23: Recessed part 8, 9, 10, 11: Concavo-convex line (concave part) 15: Concavo-convex step (concave part), 24: Concavo-convex hole ( Uneven portion) N: boundary line, S: discontinuous portion

Claims (1)

[Scope of utility model registration request] 1. A lid of a packaging container in which a pyramidal bulging portion having a peripheral surface piece and a bottom surface piece is formed by bulging one surface side of a sheet material or a plate material, the lid of the bottom surface piece. In the vicinity of the boundary line with the peripheral surface piece, a convex portion is formed on one surface side of the bulging portion and a concave portion is formed on the other surface side to form a concave portion that fits the previous convex portion. The concavo-convex part can be fitted in only one place in the same phase as the concavo-convex part of another same lid that is overlapped, and the total length of the concavo-convex part forming portion of each side is made equal to change the setting position of the discontinuous part Or, a lid structure for a packaging container, characterized in that the length of each one is made equal and the set positions are changed.