JPH0248349Y2 - - 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, and is used in the field of manufacturing cans.

(Purpose of the invention) The opening device of this invention is intended to give an opening tool a function other than opening. The function is to prevent the scheduled opening from breaking due to an unexpected external force or to reclose the opening.

(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, there was a risk of causing unexpected harm by discarding the cut pieces.

In order to solve this problem, the applicant previously provided an opening score in a circular 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) According to the technique of Utility Model Application Publication No. 58-3436, the ease of opening and the disposal of the cut pieces were solved, but
The opening tool only worked to open the end, and did not work to avoid score breakage or to reclose the opening when the knob was pressed down by an unexpected external force.

(Means for solving the problem) A cut section closed with an opening score or synthetic resin is provided in the end plate of the can as an opening section in an incomplete annular manner, and the section surrounded by the opening section is An opening tool is fixed to the end plate (cut piece). One side of the opening tool covers the upper and lower sides of the fracture initiation portion of the planned opening portion.

The opening tool has a knob whose proximal end is a part that enters into the can and whose distal end is a knob,
When covering the upper side of the breakage starting part, the tip of the knob is positioned slightly outside the planned opening part. In addition, when covering the lower side of the breakage starting portion, a latching protrusion piece is provided in succession on the lower surface of the knob piece, and one side edge of the latching protrusion piece is positioned slightly outside of the planned opening portion. If the upper surface of the latching convex piece is fixed to the lower surface of the end plate (for example, by heat fusion), the intended opening portion can be protected. Further, it is preferable that the proximal edge of the latching convex piece be a straight edge parallel to the fulcrum protrusion, since this part will have the effect of guiding the folding of the cut piece, but such a configuration is not an essential requirement.

(Function of the device) In this device, the knob of the opening tool has the function of breaking the intended opening portion. Since the upper side of the rupture starting part is covered by the knob piece, the opening tool (knobs piece) has the effect of preventing the intended opening part from breaking due to unexpected external pressure. In addition, since the lower side of the rupture initiation part is covered by the latching protrusion, the opening tool (latching protrusion) can be attached to the opening edge when the opening is reclosed with the cut piece after opening. It has the effect of locking and preventing the cut piece from floating up.

Examples of this invention will be described below with reference to the drawings.

(Example) One side of the end plate 2 of a can (the figure shows a round can, but a square can may also be used) is closed with a synthetic resin 2b (only the lower side is closed in the figure, but only the upper side is closed). An opening cutting section 3 (closed or both sides may be closed) is provided, and a knob 5 is fixed to a cut piece 4 surrounded by the opening cutting section 3. The opening cutting portion 3 has an arc shape on the peripheral edge side (breakage start portion) of the end plate 2, and has two straight line portions connected thereto, so that the central portion side of the end plate 2 is incomplete.

The knob 5 has a proximal end as a protrusion into the can, a knob piece 6 with a distal end as a knob, and a cut-off piece 4.
It is composed of a protrusion 7 that is integrally formed with a knob piece 6 through a hole bored in the holder, and one side of the protrusion 7 serves as a latching protrusion 8, and the other side is a straight line. It is located as edge 7a.

The tip side edge of the locking convex piece 8 has a width (0.3 mm to 0.8
mm), and its upper surface is fixed to the lower surface of the end plate 2, and the proximal end 6a of the knob piece 6 is slightly protruded by a width toward the arc-shaped portion 3a of the opening cutting portion or the outside thereof; The knob portion 6b is shaped and sized to cover one side of the opening cut portion. Further, the straight edge 7a is parallel to a bending guide rib (concave or convex) 9 provided linearly between both ends of the opening cutting section 3. In the above, the end plate 2 is the metal plate 2
If the lower surface of a is coated with a heat-sealable resin (for example, low-density polyethylene with a Shore hardness of about 50) 2b, the latching protrusion (for example, a Shore hardness of about 50)
During the molding (injection) of high density polyethylene (high density polyethylene of 60 or higher) 8, the latching convex piece 8 and the end plate 2 are automatically heat fused.

Further, on both sides of the knob piece 5, a fulcrum projection 10 is provided.
10 is provided to protrude across the opening cutting section 3.
The fulcrum projections 10, 10 are provided parallel to the bending guide rib 9. In the figure, 11 is a reinforcing rib (concave or convex).

In addition, the incomplete ends 3b and 3c of the opening cutting part 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, since the base end 7 of the knob piece 6 covers the fracture initiation part of the opening cutting part 3, the external pressure applied to the knob is supported inside and outside of the opening cutting part 3. There is no risk of breakage due to unexpected external force.

To open the can end plate 2 of this embodiment, first lift the knob 6b of the knob 6 as shown by the arrow 13 in FIG. The in-can entry section 6a enters into the can as shown in FIG. 4 and cuts off one side of the opening cut section. Therefore, when the knob 6b is pulled up obliquely upward as shown by the arrow 14 in FIG. When they come into contact with each other and are 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 tab 6 is set to fit within the end plate, it can be lowered below the periphery of the end plate, as shown in FIG. 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 cut portion, and reinforce the opening edge. The knob piece may be fixed in the mounting hole by injection molding or by inserting the mounting piece into the mounting hole and molding the protruding portion thereof under heat and pressure into the illustrated mold.

According to this embodiment, since one side of the fixing convex portion 7 is formed with a straight edge 7a, the cut piece can be neatly folded, but the straight edge 7a is not an essential requirement. Also, since the latching convex piece 8 is fixed to the bottom surface of the end plate,
Although the opening cutting section 3 can be protected, the structure of fixing it is not an essential requirement.

Further, according to this embodiment, the fulcrum projections 10, 1
Since the protrusion 0 is provided, the protrusion 1 can be opened by pulling up the knob using the protrusions 10 and 10 as fulcrums when opening.
0 and 10 act as the fulcrum of the lever, and the protrusions 10 and 10 engage the non-opening portion of the end plate to prevent the fulcrum from falling into the can, thereby preventing the initial breakage of the opening cut portion. is easy.

After opening as described above, when it is necessary to reopen the opening, extend the cut piece 4 into a flat shape to close the opening, and hook the tip of the latching protrusion 8 to the opening edge 16. make it stop Due to this latching, even if the end plate is made of a non-rigid material, the closed state can be maintained without fear of the cut piece coming up.

In some cases, the latching protrusion 8 may cover the entire length of the opening cutting section 3 on the lower side thereof. In this way, the opening cutting section 3 can be closed more reliably.

In addition to the shape of the opening cutting portion 3 having the same width as in the embodiment, the width may be gradually narrowed from the periphery of the end plate toward the center.

Furthermore, since one side of the opening cutting part is covered with the knob 6b, the external force applied to the knob 6b is supported inside and outside of the opening cutting part 3, so that the opening cutting part is not affected by an unexpected external force. can be prevented from breaking.

In place of the opening cutting part 3 in this embodiment,
The planned opening portion can also be used as a score.

According to this embodiment, both the upper and lower sides of the cutting part for opening are covered with the opening tool, but any device that covers either one is within the technical scope of this invention.

(Effects of the invention) According to this invention, the opening can be easily opened by simply lifting the knob of the opening tool and pulling it diagonally upward.
Furthermore, since the cut pieces are not separated from the can, there is an effect of preventing accidental harm caused by throwing away the cut pieces. Furthermore, since both the upper and lower sides of the planned opening portion are covered with the opening tool, the opening tool can have a function other than opening. That is, since the upper side of the planned opening part is covered with the opening tool and the knob on the tip side of the opening tool is made to protrude outside of the rupture starting part, opening due to unexpected external pressure can be prevented. In addition, a latching convex piece whose lower side is latched to the bottom surface of the end plate of the opening tool is connected to the bottom surface of the knob piece, and one side is made to protrude outside of the breakage start part, so that the latching convex piece and the knob Since the opening tool can be hooked to the edge of the opening at one end to prevent the cut piece from lifting up, the opening can be reclosed with the cut piece, and the planned opening can be filled with contents. This has the effect of preventing it from being infiltrated by.

[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 the opening cutting section. 1...can, 2...end plate, 3...cutting part for opening,
4... Cut piece, 5... Picking tool, 6... Picking piece, 7
...Convex portion, 7a... Straight edge, 8... Latching convex piece, 1
0...Latching protrusion.

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 an opening tool having a tab piece having a proximal end as a can entry part and a distal end as a knob part is fixed to a cut piece surrounded by the opening part, the breaking of the opening part. The starting part is covered by the opening tool, and the opening tool has a latching convex piece that is latched to the lower surface of the end plate and is connected to the lower surface of the knob piece, and one side of the latching convex piece starts to break. The can opening device is configured such that the proximal end of the knob protrudes to the outside of the rupture start part. 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 of the utility model registration claim, wherein the knob has fulcrum protrusions on both sides extending in the same straight line and extending beyond the intended opening portion. 4. The can according to claim 1, wherein one side edge of the latching protrusion facing the incomplete side of the scheduled opening part is a straight edge parallel to a straight line connecting both ends of the scheduled opening part. Opening device. 5. The can opening device according to claim 1, wherein the upper surface of the latching convex piece is fixed to the lower surface of the end plate. 6 The planned opening is incomplete at the center of the can.
The can opening device according to claim 1, which is curved inwardly or outwardly in an arcuate manner. 7. The can opening device according to claim 1 of the utility model registration claim, wherein the scheduled opening portion is provided with equal width or successively narrower widths from the periphery toward the center of the can. 8. 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.