JPH03226409A - Method and apparatus for bending lid flange - Google Patents

Abstract

PURPOSE:To bend easily a edge part of a lid by bending downward he edge part projecting outward by pressing a lid pressing plate against the lid, pushing partly the edge part under a flange of a container by means of a bending disc, and folding the whole edge of the lid part under the flange by rotating the lid pressing plate and the container. CONSTITUTION:A container (r) is adhered and sealed with a cover film, and when it is transferred just under a bending means 10 by a backet (b), the container (r) is pushed up at the lower end by a pushing-up plate 60, so that a flange part (f) comes out of contact with the upper surface of the backet (b). When a supporter 20 is made to come down, a bending mechanism 30, a rotating mechanism 40 and a folding mechanism 50 come down so that a lid pressing plate 44 comes into contact with a lid (c) and presses it down. When the supporter 20 comes further down, a bending member 31 bends a flange part of the lid (c) projecting outward in radial direction from the flange part (f) in the downward direction. A driving shaft 51 rotates to rotate a folding arm 53 so that a folding disc 55 folds an edge part of the lid (c) under the flange part (f). Then a rotary shaft 41 rotates to cause the lid pressing plate 44 and the container (r) to rotate, so that the rest of the flange of the lid (c) which is bent downward is also folded under the flange (f).

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention is a filling and packaging machine for cup-shaped containers, in which a lid is adhesively sealed to the flange of the container, and then the edge of the lid is wrapped around the flange. The present invention relates to a method and apparatus for folding the edge of a lid by folding it downward.

(b) Prior Art A conventional device for bending the edge of a lid adhesively sealed to the flange of a cup-shaped container is disclosed in, for example, Japanese Utility Model Application No. 1-58404. However, this device does not allow the edge of the lid to be approximately 90 mm wide with respect to the top surface of the flange.
° Since the flange is simply bent downward, in order to fold the flange downward so as to wrap around the flange, a separate device must be provided for this purpose, resulting in the problem of making the device complicated and large. Ta.

(c) Problem to be solved by the invention The problem to be solved by the invention is to bend the edge of the lid so as to wrap around the flange of the container in a simple manner using a single device. .

(d) Means for Solving the Problems One of the inventions of the present application is a method for folding the edge of a side dish, in which the edge of the lid, which is placed over and adhered to the flange of the container, is folded below the flange. , the flange of the container is floated above the top surface of the container transport packet, the lid press plate is pressed against the lid, and the edge of the lid that protrudes outward from the flange is bent downward, and the lid is bent downward. A portion of the edge of the lid is pressed into the lower surface of the flange with a rotatable bending disk, and the lid holding plate is rotated to rotate the container, whereby the edge of the lid is bent downward. The entire body is configured to be folded under the flange.

Another invention of the present application is a lid edge folding device that folds the edge of a lid that is placed over and adhered to a flange portion of a container to the lower side of the flange portion. A cylindrical bending member for bending the edge of the lid protruding outward from the flange portion downwardly is provided above the transport packet so as to be movable up and down, and a plurality of notches are formed at the lower end of the bending member, A lid holding plate is rotatably provided in the bending member and pressurized to the lid to rotate the container, and presses the lid holding plate downward, and an arm is provided on the outside of the bending member for rotating. The arm is rotatably provided with a folding disc that can be inserted into the lower side of the flange through a notch in the folding member.

(E) Operation In the above configuration, when a container with a sealed lid is conveyed under the edge folding device by the container transport packet, the container is pushed upward with respect to the transport packet. In this state, the bending member moves relative to the container, bends the edge of the lid protruding from the outer periphery of the flange of the container downward, and presses it down with the lid pressing plate. After that, the arm approaches the bending member, and the folding disc folds the edge of the lid that is bent downward through the notch of the bending member into the underside of the flange, and then moves to the underside of the flange. Then, the lid presser plate rotates and folds the entire edge of the dish under the flange.

(to) Example Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a folding device 10 of this embodiment is shown. This bending device 210 has an actuating device such as a cylinder (
(not shown) attached to the support body 20 which can move up and down, a rotating IIA ellipse 40 for rotating the container, and a folding mechanism for folding the edge of the sauce C into the lower side of the flange. It includes a mechanism 50 and a push-up plate 60 that is disposed below the packet transfer route of the packet conveyor that conveys the containers r and that pushes up the containers that are directly below the folding device.

The bending mechanism 30 has a hollow cylindrical bending member 31 that is fitted and fixed in a hole to attach the support 20, and the lower end 32 of the bending member 31 is inserted into the flange of the container r. widened in diameter.

A plurality of notches 33 are formed at the lower edge of the bending member 31 at equal intervals in the circumferential direction.

The rotation mechanism 40 includes a hollow rotation shaft 41 rotatably supported within the bending member 31 and coaxially with it by a bearing 42, and a hollow rotation shaft 41 that rotates together with the rotation shaft 41 but is relatively movable in the axial direction. A lid holding plate 44 is provided between the inserted shaft 43, the lid holding plate 44 fixed to the lower end of the shaft 43 and housed in the lower rIA 32 of the bending member 31, and the lower end of the rotating shaft 43 and the lid holding plate 44. A spring 45 that presses the sub-pressing plate 44
A gear 46 is integrally formed on the upper part of a four-rotation shaft 41, which is rotated by a motor (not shown) or the like via gear ii.

A plurality of folding mechanisms 50 are arranged around the folding member 31 (same number as the notches 33 of the folding mechanism), but the first
One of them is shown in the figure. This insert a! The l structure 50 includes an operating shaft 51 rotatably supported in parallel with the bending member 31 by a support 52 attached to the support body 20, a folding arm 53 attached to the lower end of the operating shaft 51, and a folding arm 53. A shaft 54 is rotatably supported at the tip of the shaft 54 in parallel with the operating shaft 51, and a folding disk 55 is fixed to the lower end of the shaft 54. Operation axis 5
An operating arm 56 is attached to the upper end of the roller 1, and a roller 57 is attached to the operating arm 56. The operating shaft 51 rotates when the roller 57 is pushed by an external actuator (not shown), and the folding arm 53 or X in FIG.
By rotating from the -X direction to the YY direction, the folding disc 55 enters into the notch 33 of the folding member 31.

As shown in FIG. 4, the folding device 10 having the above structure is disposed at the most downstream position of the packet conveyor 2 of the filling and packaging machine 1, and operates as follows to fold the edge of the lid.

In addition, in FIG. 1, 3 is a container hopper, 4 is a filling device,
5 is a sealing device, 6 is a punching device, and F is a cover film punched out as a lid.

After the cover film is adhesive-sealed to the container r and the container r is punched out by the punching device 5, the container r is sent directly below the folding device 10 by the packet b, and the container r is cut into the shape shown in FIG.
As shown in A], the lower end is pushed up by the push-up plate 60, so that the entire packet is pushed up with respect to the packet, and the flange portion f is separated from the top surface of the packet 6. Then, as the support body 20 is lowered, the bending mechanism 30,
The rotation mechanism 40 and the folding mechanism 50 are lowered, and as shown in FIG.
] As shown in FIG. 5 [C], the presser plate 44 first comes into contact with the lid C and presses the lid, and when the support #20 further descends, the lower end edge of the bending member 31 or the flange portion as shown in FIG. f
The edge of the MC that protrudes radially outward from the flange portion is bent downward.

After that, the operation shaft 51 rotates and the folding arm 53
The folding disc 55 is rotated from the direction in the Y-Y direction, and the folding member 3 is rotated under the flange part f as shown in the fifth diagram.
1 into the notch 33, and fold the edge of the lid in that area under the flange, and the support will rise slightly to lift the container and push it up as shown in Figure 5 (D). Float from the board 60.

Next, in this state, the rotating shaft 41 is rotated by a motor or the like, so that the lid holding plate 44 is also rotated, thereby rotating the container. Therefore, the other part of the edge of the lid that is bent downward is also folded under the flange part f, and the bending operation of the edge is completed.

When the folding operation is completed, the folding arm 53 returns to the XX direction, and then the support body 20 rises. The container is then sent to the downstream take-out position by the getter b.

In the above embodiment, the folding disk has a smooth outer periphery, but as shown at 55a in FIG. 6, the outer periphery may have gear-shaped irregularities. When the edge of the lid is folded under the flange of the container using the folding disk 55a, as shown in FIG. It has a pattern m, which improves its appearance.

(g) Effect According to the present invention, the following effects can be obtained.

(2) The lid of a cup-shaped container can be folded so as to wrap around the flange using a single folding device, thereby simplifying the device and reducing costs.

(2) If the number of folding disks is increased, the folding operation can be completed with a smaller rotation angle of the container, for example, 120 degrees for 3 ffil and 90 degrees for 4 pieces, so it is possible to speed up the folding operation.

■ The container is lifted and rotated to a position where it does not touch the packets on the packet conveyor, so the container will not be damaged.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a lid edge folding device according to the present invention;
FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a side view of the lower end of the folding member, and FIG. 4 is a schematic diagram of a filling and packaging machine equipped with a folding device. FIG. 5 is an explanatory diagram of the operation of the folding device, FIG. 6 is a diagram showing a modified example of the folding disc, and FIG. 7 is a diagram showing a state in which the folding disc of FIG. 6 is used to fold, [A] is a side view, and [B] is a view seen from below [A]. lO: Folding outfit! 20: Support body 30: Folding mechanism 31: Folding member 33: Notch 40: Rotating m-ellipse 41: Rotating shaft 44: Lid holding plate 50: Folding m-ellipse 54: Folding arm 55° 5a: Folding disc

Claims (1)

[Claims] 1. In a lid edge bending method in which the edge of a lid that is placed over and adhered to a flange of a container is bent below the flange, the flange of the container is Float it above the top surface of the transport bucket, press the lid holding plate against the lid, and bend the edge of the lid that protrudes outward from the flange portion downward, and partially remove the edge of the lid that has been bent downward. A lid in which the container is rotated by rotating the lid holding plate with a rotatable bending disc pushed into the lower surface of the flange, thereby folding the entire edge of the lid bent downward under the flange. How to fold the edges. 2. The method of folding the edge of a lid according to claim 1, wherein the folded disk has irregularities formed on its outer periphery to form a substantially regular pattern on the folded portion. 3. In a lid edge bending device that bends the edge of the lid that is placed over and glued onto the flange of a container to the lower side of the flange, the lid is placed above the container transport bucket that holds and transports the container. A cylindrical bending member for bending the edge of the lid protruding outward from the flange portion downward is provided so as to be movable up and down, and a plurality of notches are formed at the lower end of the bending member,
A lid holding plate is rotatably provided in the bending member and pressurized to the lid to rotate the container, and presses the lid holding plate downward, and an arm is provided on the outside of the bending member for rotating. A device for folding an edge of a lid, characterized in that the arm is rotatably provided with a folding disc that can be inserted into the lower side of the flange through a notch in the folding member.