JPH0454102Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a can opening device provided with a score or other intended opening portion.

The main purpose of the opening device of this invention is to prevent the intended opening portion from breaking due to unexpected external force.

(Prior Art) It is known that when opening a can, a part of the tab is fixed to the inside of the opening score or other intended opening part, but since the intended opening part is usually annular, The cut piece with the pick piece to be removed will be separated from the can. Therefore, by discarding the cut pieces, there was a risk of causing unexpected harm due to the cut pieces.

In order to solve this problem, the applicant previously provided an opening score in a circularly incomplete manner, and
We proposed a device in which fulcrum protrusions were provided on both sides of the knob protruding beyond the opening score (Utility Model No. 58-3436).
issue).

(Problems to be solved by invention) According to the technique of the above-mentioned Utility Model Application Publication No. 58-3436, the ease of opening and the disposal of the cut pieces were solved, but
No consideration was given to avoidance of score breakage when the knob was pressed down by an unexpected external force.

Further, the integral structure between the end plate of the can and the knob was unstable.

Furthermore, since the cut-off piece remains on the end plate, it was desirable to consider re-closing the opening with the cut-off piece.

(Means for solving the problem) However, this idea coats the bottom surface of the end plate of the can with a heat-sealable resin and fuses it integrally with the corresponding part of the knob, and at the same time, the protrusion for the fulcrum of the knob The above-mentioned conventional problems were solved by extending the opening outside the planned opening area.

That is, this invention provides an incomplete annular opening portion on the end plate of the can, and a cut-out piece surrounded by the opening portion, with the proximal end serving as the can-entering portion and the distal end serving as the knob portion. In the device for fixing the knob piece, the part of the knob piece that enters the can projects slightly to the outside of the planned opening part, the knob part has a shape and size that covers one side of the planned opening part, and the part of the knob part is shaped and sized to cover one side of the planned opening part, A knob fixing part is provided on the lower surface of the plate integrally with the knob, and the knob fixing part is fixed by heat fusion with a heat-sealing resin coated on the lower surface of the end plate. One side of the knob fixing part is a latching convex piece that protrudes outward from the breaking start part of the scheduled opening part, and is opposed to the can intrusion part. The can opening device is characterized in that the fulcrum projections are provided on the same straight line and protrude beyond the intended opening portion.

The planned opening portion may be an opening score or a cut portion closed with a synthetic resin.

Further, the proximal edge of the knob fixing portion can be a straight edge parallel to the fulcrum projection. The planned opening can then be incomplete at the center of the can and curved inwardly or outwardly in an arc. Furthermore, the end plate may be provided with a linear folding guide rib between both ends of the intended opening portion. Further, the opening portions may be provided with equal widths or with widths gradually narrowing from the periphery of the can toward the center.

(Function) In this invention, the portion of the knob that protrudes into the can has the function of preventing unexpected external pressure applied to the knob from being directly transmitted to the planned opening portion. Further, the abutment portion between the knob piece and the lower surface of the end plate is integrally fused.

After opening the planned opening part, when the cut piece is returned to the opening side, the opening edge is clamped between the part of the knob piece that protrudes into the can and the knob piece fixing part provided integrally with the knob piece, and the knob piece The knob covers one side of the opening, allowing the opening to be reclosed.

(Example) An embodiment of this invention will be described based on the drawings.

An opening score 3 is provided on one side of an end plate 2 of a can (the figure shows a round can, but a square can may also be used), and a tab piece 5 is attached to a cut piece 4 surrounded by the opening score 3. is fixed. The opening score 3 has an arc shape on the peripheral edge side (breakage start part) of the end plate 2, and has two linear parts connected to each other so that the center side of the end plate 2 is incomplete.

The knob piece 5 is attached to a knob piece fixing part 7 integrally formed with the knob piece 5 through a through hole 6 formed in the cut piece 4.
The proximal end side of the knob piece 5 is a can entry part 5a, and the tip side is a knob part 5b, and the can entry part 5a has an opening score 3.
It protrudes outward (approximately 0.5 mm) from the knob 5.
b has a shape and size that covers one side of the opening score 3. Further, a latching convex piece 8 is continuously provided on one side of the knob fixing part 7, and a straight edge 7 is provided on the other side.
It is listed as a.

The leading end edge of the locking convex piece 8 is slightly protruded by a width (0.3 mm to 0.8 mm) to the outside of the arcuate portion 3a of the opening score, so as to face the in-can plunger 5a. Its upper surface is fixed to the lower surface of the end plate 2. Further, the straight edge 7a is the opening score 3.
It is parallel to a bending guide rib (concave or convex strip) 9 provided linearly between both ends of the guide. In the above,
Heat-seal resin (for example, low-density polyethylene with a Shore hardness of about 50) 2b to attach the end plate 2 to the lower surface of the metal plate 2a.
If it is coated with a latching convex piece (for example, high-density polyethylene with a Shore hardness of 60 or more)
At the time of molding (injection) of 8, the latching convex piece 8 and the end plate 2 are automatically heat-sealed. The top surface of the end plate 2 is also coated with heat-sealing resin.
It is preferable to fix it to the lower surface of the proximal end of the knob piece 5.

Further, on both sides of the knob piece 5, a fulcrum projection 10 is provided.
10 protrudes across the opening score 3.
These fulcrum projections 10, 10 are the bending guide ribs 9.
It is provided along a straight line that is parallel to and passes through the through hole 6 for fixing the knob piece.

Reference numeral 11 in the figure is a reinforcing rib (concave or convex strip), which is designed to reinforce the opening edge when the intended opening portion is opened.

In addition, the incomplete ends 3b and 3c of the opening score 3
If it curves inward as shown in Fig. 8 or outward as shown in Fig. 9, the cut piece will move as shown by the arrow 1 in Fig. 8.
There is no risk of being torn in the 2nd direction.

According to this embodiment, the portion 5 of the knob 5 that protrudes into the can
a is made to protrude to the outside of the arcuate portion 3a of the opening score 3, and the knob portion 5b is structured to cover one side of the opening score 3, so that the external force applied to the knob piece 5 is supported inside and outside of the opening score. As a result,
Breakage of the opening score 3 due to unexpected external force can be prevented. In addition, since the upper surfaces of the knob fixing portion 7 and the latching protrusion 8 are heat-sealed to the heat-sealing resin 2b on the lower surface of the end plate 2, the knob 5 is subjected to rotational force (a surface parallel to the end plate). rotation can be prevented even if the inside) is applied.

To open the can end plate 2 of the above embodiment, first lift the knob 5b of the knob 5 as shown by the arrow 13 in FIG. The in-can entry part 5a enters into the can as shown in FIG. 4 and cuts off one side of the opening score 3. Then, when the knob 5b is pulled up obliquely as shown by the arrow 14 in FIG. When the cut pieces are brought into contact with each other and further pressed down in the direction of arrow 15 in FIG. 5, the cut pieces are folded as shown in FIG.

When folding, if the size of the knob 5 is set to fit within the end plate, it can be lowered below the periphery of the end plate, as shown in Figure 6, and there is no danger of it getting in the way. Note that the ribs 11, 11 are parallel to each other along the outside of the opening score, and reinforce the opening edge. The above-mentioned fixation of the knob can be achieved by embedding the through hole 6 by injection molding, or by inserting the knob fixing part 7 into the through hole 6 and molding the protruding part under heat and pressure into the illustrated mold.

According to this embodiment, since the protrusions 10, 10 are provided, the knob 5 can be operated using the protrusions 10, 10 as the fulcrum of the screw, and there is no fear that the knob 5 will fall into the can through the opening. This makes opening easier. Further, since one side of the knob fixing portion 7 is formed with a straight edge 7a, the cut-off pieces can be folded in an orderly manner, but the straight edge 7a is not an essential requirement. Furthermore, since the latching convex piece 8 is fixed to the lower surface of the end plate, the score 3 can be protected.

As a result of providing the latching convex piece 8, when it becomes necessary to reclose the opening after opening as described above, the cut-off piece 4 is extended into a flat shape to close the opening. The tip of the latching convex piece 8 is latched to the opening edge 16 (FIG. 7). In this way, even if the end plate is made of a non-rigid material, the closed state can be maintained without the risk of the cut piece coming up. In this case, the opening edge along the arcuate portion 3a of the score 3 is sandwiched between the latching convex piece 8 and the in-can entry part 5a of the knob piece 5, and is covered with the latching convex piece 8, and the straight part of the score 3 is Since the opening is covered with the knob 5b of the knob 5, the opening can be completely closed and foreign matter can be prevented from entering.

In addition, the latching convex piece 8 can also be made to cover the lower side of the score 3 over its entire length.

In addition, the shape of the score 3 may be of equal width as in the embodiment, or may be gradually narrower from the periphery of the end plate toward the center.

Instead of the opening score 3 in the above example,
The planned opening portion may also be a cut portion closed with synthetic resin. In this case, the synthetic resin may be one that closes at least one of the front and back sides and keeps the cut portion airtight.

(Effect of the invention) According to this invention, the part of the knob that enters the can is slightly protruded to the outside of the intended opening part, and the knob part is shaped and sized to cover one side of the intended opening part.
The external force applied to the knob piece is supported inside and outside the planned opening portion, and there is no fear that the force will be concentrated only on the planned opening portion. Therefore, there are effects such as being able to prevent the planned opening portion from breaking due to an unexpected external force.

In addition, since the protrusions for the fulcrum of the knob are provided on both sides of the knob in the same straight line and beyond the planned opening area, the knob always rotates on the top surface of the end plate, preventing it from falling into the can. It has no effect. Next, the lower surface of the end plate is coated with heat-sealing resin, and the knob fixing portion is heat-sealed to the heat-sealing resin, so that the knob is fixed and has the effect of preventing rotation. Furthermore, one side of the knob fixing part is made to face the in-can plunge part of the knob as a latch convex piece that protrudes outward from the breaking start part of the planned opening part, so that the can intrusion part and the latch are made to face each other. The opening can be reclosed by pinching the edge of the opening with the locking protrusion piece, and in the reclosed state, the opening is completely covered by the latch protrusion piece and the knob of the knob piece. This has the effect of preventing foreign matter from entering.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the embodiment of this invention, Fig. 2 is a partially enlarged bottom view of the end plate, Fig. 3 is a partially enlarged cross-sectional view, and Fig. 4 is a cross-section with the knob lifted. Figure 5 is a cross-sectional view of the cut-off piece in the same state, FIG. 6 is a cross-sectional view of the cut-off piece in the folded state, and FIG. 8 and 9 are plan views showing other examples of opening scores. 1...can, 2...end plate, 3...opening score,
4... Cut piece, 5... Pick piece, 5a... In-can protrusion part, 7... Pick piece fixing part, 7a... Straight edge, 8...
...Latching convex piece, 10...Protrusion for fulcrum.

Claims (1)

[Claims for Utility Model Registration] 1. A planned opening is provided in the end plate of a can in an incomplete annular manner,
In a device in which a knob piece whose proximal end is a part that protrudes into the can and whose distal end is a knob part is fixed to the cut piece surrounded by the planned opening part, the part of the knob part which protrudes into the can is scheduled to open. The knob part is shaped and sized to cover one side of the planned opening part, and a knob fixing part is provided integrally with the knob part on the lower surface of the end plate. , the knob fixing portion is fixed by heat fusion with a heat fusion resin coated on the lower surface of the end plate;
and one side of the knob fixing part is a latching convex piece that protrudes outward from the tearing start part of the planned opening part, and is opposed to the can entry part, and on both sides of the knob, A can opening device characterized in that the fulcrum protrusions of the knobs are provided on the same straight line and protrude beyond the intended opening portion. 2. The can opening device according to claim 1, wherein the scheduled opening section is a cutting section closed with an opening score or a synthetic resin. 3. The can opening device according to claim 1, wherein the proximal edge of the knob fixing portion is a straight edge parallel to the fulcrum protrusion. 4. The can opening device according to claim 1, wherein the scheduled opening portion is incomplete at the center of the can and curved inwardly or outwardly in an arc. 5. The can opening device according to claim 1, wherein the end plate is provided with a linear folding guide rib between both ends of the intended opening portion. 6. The can opening device according to claim 1, wherein the opening portion is provided with equal width or successively narrower widths from the periphery toward the center of the can.