JP2000117339A - Dustproof treatment in can opening part of canned food and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sanitarily drink and eat without anxiety for bringing a lip into contact with a can opening part by forming a sunk part in a bending part biting the sunk part into a recessed part formed in the lower side of a seaming part of the can opening part and bringing the sunk part close contact with the recessed part. SOLUTION: A cover material which is delivered from a delivering roll 11 is made to pass through the upper part of a can 2 and wound onto a winding roll 13. The cover material is superposed on a can opening part of the can 2. The outer peripheral part of the cover is bent downward using the can opening part 17 of the can 2 as a male die while heating the outer peripheral part of the cover. Further, the sunk part is formed in the bending part biting the sunk part into the recessed part formed in the lower side of a seaming part 18 of the can opening part 17 while heating the bending part. These working are executed using a driving cylinder 20, a movable plate 21a, a bending device 16 or the like, and the sunk part is brought into close contact with the recessed part. A sheet of heat sealing paper, wherein heat melt sticking resin is coated on at least one surface of a sheet of heat resistant and water resistant paper, is used in the cover material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-proofing method for coating can-opened portions of canned foods such as beverages such as coffee and juice, and fruits, and an apparatus therefor.

[0002]

2. Description of the Related Art Canned beverages and foods are sold with a plastic cover partially covered, but most are sold without a lid. Despite dust adhering to the canned portion of such a can, especially in the case of a beverage can, the canned portion is opened, and directly to the winding portion,
It is very unsanitary, drinking by mouth.

Further, the plastic lid is inconvenient in storage and handling, and has a drawback that the cost of dust-proofing the opening of the can is high.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been developed in view of the above-mentioned problems of the conventional dustproof treatment, and is intended for drinking,
An object of the present invention is to provide a method and a device for dust-proofing a canned canned portion, which allows the user to directly touch his / her lips when eating or drinking.

[0005]

According to a first aspect of the present invention, there is provided a method for dust-proofing an open canned portion of a can according to the present invention. Stacking, heating the outer periphery, bending the open part downward as a male mold, and further heating the bent part,
It is characterized in that a concave portion is formed in the bent portion by being cut into a concave portion formed below the winding portion of the can opening portion, and the concave portion is brought into close contact with the concave portion.

In the processing method according to the first aspect of the present invention, the opening of the can is made a male type, the periphery of the cover material placed over the can is bent downward, further pressed inward, and this portion is heated. , A concave portion is formed, the concave portion closely adheres to a concave portion formed below the winding portion, the can open portion is sealed,
This prevents dust from adhering to the opening.

A processing method according to a second aspect of the present invention is characterized in that a heat seal paper is used for the cover material in the processing method according to the first aspect.
It is characterized in that a thermoplastic resin sheet is used for the cover material.

In the processing method according to the second aspect of the present invention, since the cover material is a heat-sealing paper, the can-opening portion in which the heat seals are male-type by bending downward, pushing inward, and heating. It fits into and adheres to it, and is molded to seal the can open part.

In the processing method according to the third aspect, since the cover material is a thermoplastic resin sheet, the cover material is bent downward,
By being pushed inward and heating, it is adapted to the male can opening and molded, and the can opening is sealed.

According to a fourth aspect of the present invention, there is provided a dust-proofing device for a canned can opening portion, and a device for transferring a cover material onto a canned can opening portion disposed at a predetermined position of the canning device. A folding device provided with a female mold with a heater that bends the periphery of the cover material on the outer periphery of the can opening portion so as to be able to move up and down, and a bent portion of the cover material in a concave portion below the winding portion in the opening portion. A side seal device provided with a heater-suppressing member for raising and lowering the heater to form a concave portion by biting
And a device for discharging cans, which is provided so as to operate sequentially.

In the processing apparatus according to the fourth aspect of the present invention, the cover material is fed by the supply device onto the can opening portion of the can which has been transferred by the can transfer device, and the periphery of the cover material is opened by the bending device. The bent portion is bent to the outside of the can portion, and subsequently the bent portion is pressed toward the inside, that is, toward the can by the side sealing device, and the portion is cut into the concave portion below the winding portion to form a concave portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a front view of a dust-proofing device for opening a can in a canned portion, FIG. 2 is a sectional view taken along line XX shown in FIG. 1, and FIG. 3 is a side view of the device. FIG. 4 is a longitudinal sectional view of a bending device in the processing apparatus, and FIG. 5 is a longitudinal sectional view showing an operation state of the folding device.
6 is a longitudinal sectional view of the side seal device, FIG. 7 is a longitudinal sectional view showing an operation state of the side seal device, and FIG. 8 is a sectional view taken along line YY shown in FIG. FIG. 9 is an explanatory view showing the steps of a method for dust-proofing the canned portion at the can opening portion. FIG. 10 is a plan view of a cover material used in the processing method and apparatus.

Reference numeral 1 in the figure denotes a frame in the present apparatus. A transfer device 3 for continuously feeding canned food 2 into the frame 1 from one side is provided on the front side of the frame 1. On the side, there is provided a discharge device 4 for continuously feeding the can 2 into the frame 1 to the other side.

In the frame 1, between the transfer device 3 and the discharge device 4, a support table 5 having the same height as these is provided. On the support table 5, the first process area A
And a second process area B.

In front of the frame 1, there is provided a pusher 7 which moves forward and backward by a driving air cylinder 6. On the front side of the pusher 7, a concave portion 8 for holding the side of the can 2 in the frame 1 is continuously provided, and on one side of the pusher 7, the can 2 continuously supplied by the transfer device 3. Is stopped at a fixed position.

Reference numeral 9 denotes an apparatus for supplying a cover material 10 in the present apparatus. The cover material 10 fed from a feed roll 11 provided at the front end of the frame 1 is canned in a first process area via a tension roll 12. 2, and a winding roll 13 provided at the rear end of the frame 1.
It is wound so that it can be wound up.

The cover member 10 is in the form of a tape in which a heat-sealing resin is coated on one side of heat-resistant and water-resistant paper. As shown in FIG. 10, a cut 14 having a diameter slightly larger than the diameter of the can is made over the entire length. When the cut portions 14 are pressed from above, the connecting portions 15 provided at intervals are easily cut and punched in a circular shape.

Reference numeral 16 denotes a bending device that bends the outer peripheral portion of the cover member 10 downward to the outside of the can open portion 17 of the can 2, that is, outside the winding portion 18 to form a ring-shaped bent portion 19. Yes, first process area A in frame 1
Above, the number of cans 2 (10 in the case shown) is placed on the movable plate 21a which is raised and lowered by the driving air cylinder 20.
Are arranged side by side in line.

As shown in FIGS. 5 and 6, the bending device 16 fixes a cylindrical female mold 24 having a heater 23 at the lower end thereof to a mounting hole 22 formed in the movable plate 21a.
At the lower end of a shaft 25 penetrating the female mold 24 so as to be movable up and down,
A pressing plate 26 that moves up and down in the female die 24 is fixed, and a spring 27 is disposed between the pressing plate 26 and the female die 24.
Reference numeral 28 denotes a lock nut screwed onto the upper portion of the shaft 25.

Reference numeral 29 denotes a side seal device for forming the concave portion 31 by making the bent portion 19 formed in the first process area A bit into the concave portion 30 formed below the winding portion 18. In addition, on the second process area B in the frame 1, the movable plates 21b are arranged in a line in accordance with the number of cans 2 on the movable plate 21b.

In this side seal device 29, intermediate portions of a number of rotating arms 33 are pivotally mounted on the outer periphery of a holder 32 fixed to the movable plate 21 b by a shaft 34 at intervals, and the lower end of each rotating arm 33 is Pressing plate 36 heated by heater 35
And a protrusion 37 is provided on the inner side of the upper end, and the protrusion 37 is brought into contact with a camshaft 38 which penetrates the movable plate 21b so as to be able to move up and down. A spring 39 is provided between the movable plate 21b and the rotating arm 33 to expand the lower end outward.
Reference numeral 40 denotes an air cylinder for driving the cam shaft 38.

In the above embodiment, although not shown in the drawings, the transfer device 3 for the can 2, the pusher 7, the supply device 9 for the cover material, the folding device 16, the side seal device 2
9, so that each operation of the discharging device 4 is sequentially repeated,
Operation control means is provided.

The embodiment of the dust-proofing apparatus for opening cans of a can according to the present invention is configured as described above, and the operation thereof will be described below together with the processing method. As shown in FIGS. 1 and 2, when a predetermined number of cans 2 are transferred to a predetermined position in the frame 1 by the transfer device 3, the pusher 7 is operated by the driving air cylinder 6, and these cans 2 are transferred. Is moved to the first process area A, and as shown in FIG. 4, the movable plate 21a disposed above is lowered by the driving air cylinder 20, the folding device 16 is lowered, and the holder 22 and the pressing plate 26 are 2. The tape-shaped cover member 10 located on the upper side 2 is pressed down.

The cover member 10 is formed by the lower end of the female plate 24 heated by the heater 23 and the pressing plate 26 as shown in FIG.
The connecting portion 15 indicated by 0 is cut. As shown in FIG. 9 (1), the circular cover material 10 cut slightly larger than the diameter of the can 2 is pressed against the can open portion 17 by a pressing plate 26 as shown in FIG. When the female mold 24 is further compressed and further lowered, the periphery of the cover material 10 is bent to the outer periphery of the can open portion 17, and a part of the cover material 10 is superimposed to form a wrinkle, and the inner surface of the heat fusion As shown in FIG. 9B, the bent portions 19 are formed by fusing the applied resin layers to each other. That is, the bent portion 19 is formed by using the open can portion 17 of the can 2 as a male type. When the bending is completed, the movable plate 21a rises, the female die 24 is pulled up, returns to the state of FIG. 4, and the first step is completed.

Subsequently, the pusher 7 moves forward, the can 2 covered with the cover material 10 is moved to the next second process area, and the movable plate 21b is lowered.

As the movable plate 21b is lowered, the side seal device 29 in the state shown in FIG. 6 is lowered, and the lower end of the holder 32 comes into contact with the can open portion 17 as shown in FIG. Is actuated to raise the camshaft 38 to push up the protrusion 37 of the rotating arm 33 against the spring 39. A large number of rotating arms 33 pivotally mounted on the holder 32 are rotated inward about a shaft 34, and a pressing plate 36 heated by a heater 35 is provided in a concave portion 30 formed below the tightening portion 18. Then, the bent portion 19 of the cover member 10 is cut into the concave portion 31 to form the concave portion 31 as shown in FIG.

Thereafter, the camshaft 38 is lowered, and the rotating arm 33 is rotated outward around the shaft 34 by the elastic force of the spring 39, and the movable plate 21b is pulled up to return to the state shown in FIG. And the second step is ended.

When the second step is completed, the pusher 7 moves forward again, and the can 2 to which the cover member 10 has been attached is moved to the discharge device 4 and carried out.

The above-described embodiment is a method and an apparatus for forming a cover material using the open can portion of the can as a male mold and simultaneously attaching the can to the open can portion to perform dustproof treatment on the can open portion.
As shown in FIG. 2, when the can 2 on the transfer device 3 is pushed into the first process area A by the pusher 7 at the same time as the can 2 is discharged from the discharge device 4, the first process area where the first process is completed is completed. The cans 2 on A extrude the cans 2 on the second process area B where the second process has been completed onto the discharge device 4, and simultaneously with the retreat of the pusher 7, a new can 2 is fed onto the transfer device 3, The dust-proofing process of the continuous can opening part is performed.

As described above, the method for dust-proofing the can opening portion of the can of the present invention and the apparatus therefor can be used until the can reaches the hands of the consumer.
Since the can open portion is sealed by the cover material and the can open portion is prevented from being stained, it is extremely sanitary. In addition, a concave portion is formed in the bent portion of the cover material, and the concave portion is securely fitted in the concave portion on the lower side of the winding portion, so that the cover material does not come off during transportation or carrying.

In the above-described processing apparatus, continuous processing is possible, and processing can be performed at low cost.

The present invention is not limited to the dust-proofing method and the apparatus for opening cans of cans according to the above embodiment. For example, cover materials punched out in a circular shape in advance may be stacked and supplied to the open can portion one by a magazine rack. The cover material may be a heat and water resistant paper coated on both sides with a heat sealing resin, or a thermoplastic resin sheet. Further, a folding device and a side seal device may be provided on a series of transfer paths, and the processing method of the present invention may be applied to an open portion of a can that passes below the folding device. In addition, a circular cover material is used for a circular can, but a cover part may be provided with a knob portion. Further, the side seal device divides the periphery of the cover material into eight equal parts and partially seals eight places.
There may be 16 places or the like, and an appropriate configuration such as a point-like or planar seal width may be adopted.

[0033]

The dust-proofing method and apparatus of the present invention can be carried out in the form described in detail above, and have the following effects.

According to the present invention, the can opening portion is sealed by the cover material until the cans reach the hands of the consumer, and the opening of the can portion is prevented from being stained. You can drink and eat by touching your lips.

In the bent portion, a wrinkle portion formed by the bending is heat-sealed, and the concave portion formed in the bent portion is securely fitted to the concave portion below the winding portion. As a result, they will not come off during transportation or carrying.

According to the invention of claim 4, continuous processing is possible and processing can be performed at low cost.

The present invention is a method and an apparatus for attaching a can opening portion to a can opening portion simultaneously with molding of a cover material by using a can opening portion as a male mold.
Even if the shape of the lower concave portion is different, a cover corresponding to the shape can be formed and tightly mounted.

[Brief description of the drawings]

FIG. 1 is a front view of a dustproofing device for opening a canned can according to the present invention.

FIG. 2 is a sectional view taken along line XX shown in FIG.

FIG. 3 is a side view of the same processing apparatus.

FIG. 4 is a vertical sectional view of a bending device in the processing apparatus.

FIG. 5 is a longitudinal sectional view showing an operation state of the folding device.

FIG. 6 is a vertical sectional view of a side seal device in the processing apparatus.

FIG. 7 is a longitudinal sectional view showing an operation state of the side seal device.

8 is a sectional view taken along line YY shown in FIG.

FIG. 9 is an explanatory view showing a processing step of the present invention.

FIG. 10 is a plan view of a cover material used in the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 frame 2 can 3 moving device 4 discharging device 5 support base 9 supply device 10 cover material 16 folding device 17 can opening portion 18 winding portion 19 bending portion 23 heater 29 side seal device 30 concave portion 31 concave portion 35 heater

Claims (4)

[Claims] 1. A cover material larger than the can open portion is placed on the open can portion of the can, and while the outer peripheral portion is being heated, the open can portion is bent downward as a male mold while further heating the bent portion. Dust prevention in a canned can open part, characterized in that it is cut into a concave part formed below the winding part in the open part, a concave part is formed in the bent part, and the concave part is brought into close contact with the concave part. Processing method. 2. The method according to claim 1, wherein the cover is made of heat-sealing paper in which heat-sealing resin is coated on at least one side of heat-resistant and water-resistant paper. 3. The dust-proofing method for a canned canned portion according to claim 1, wherein a thermoplastic resin sheet is used as the cover material. 4. A device for transferring cans, a device for transferring a cover material onto an open can portion of a can disposed at a predetermined position of the transfer device, and a heater for bending the periphery of the cover material around the open can portion A folding device provided with a female die with a movable upper and lower, and a holding member with a heater for forming a concave portion by making a bent portion of the cover material bite into a concave portion below the winding portion of the can opening portion. A freely provided side seal device,
A dustproofing device for opening a canned can, comprising a canned discharging device and a canned discharging device that are sequentially operated.