JPH09156605A - Sealing device of container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the alignment of a container so that the container is not deviated from a pattern, etc., of a lid by providing an alignment member provided with a recessed part to be aligned with a lower end part of a body wall of the container, and providing an elevating/lowering means to elevate/ lower the alignment member so that the recessed part is advanced/retracted to/from the lower end part of the body wall of the container. SOLUTION: When a slat 22 is carried in a seal station, a seal head 36 is ordered to wait at the upper limit, and an alignment ring 55 is ordered to wait at the lower limit. When the slat 22 is carried in and stopped, the alignment ring 55 is elevated together with a supporting arm 54, and if a body wall S of a container is eccentric to the alignment ring 55, alignment is made on a circumferential surface 62 of the alignment ring 55. When the alignment ring 55 is elevated close to the upper limit, a bottom part of a container C is received by a bottom surface 63 of a recess, and the container C is pushed up by the alignment ring 55. When the seal head 36 is then lowered, a lid L is heat-sealed to a flange F, and a part corresponding to the lid is punched at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for sealing a contents-filling cup-shaped container with a roll film-shaped lid member having a pattern printed thereon.

[0002]

2. Description of the Related Art An apparatus of this type is a container sealing apparatus having a downwardly tapered shell wall and a flange provided at an upper end thereof, which has a slat having a container holding hole and seals the slat. A container transfer conveyor that is intermittently driven so as to be sequentially stopped at the station,
A supply means for supplying the lid material on the flange of the container held by the slat, and a container on the upper surface of the slat via the flange of the container held by the slat stopped at the sealing station and the lid material supplied on the flange. It is known that an elevator seal head that is pressed against the edge of the holding hole is provided, and the diameter of the container holding hole is made to match the diameter of the upper end of the body wall.

[0003]

In the above apparatus, the diameter of the container holding hole is made to match the diameter of the upper end of the body wall of the container in order to prevent the design of the container and the lid material from shifting. This is to get out.

In order to accurately open the diameter of the container holding hole to a predetermined size, the processing accuracy of the container holding hole must be high, which results in a high production cost of the slat.

Further, in one sealing device, a plurality of types of containers having different sizes may be sealed. In that case, after completing the sealing work of one type of container, when performing the sealing work of another type of container next, the slat that has been used until now is the container holding hole corresponding to the container to be sealed next. It was necessary to replace the slat with a slat, but since the slat is large in number, the replacement work was troublesome.

[0006] An object of the present invention is to provide a container sealing device which is inexpensive in production cost of a slat and can cope with containers of different sizes without replacing the slat.

[0007]

SUMMARY OF THE INVENTION A container sealing device according to the present invention is a container sealing device having a downwardly tapered barrel wall and a flange provided at an upper end thereof, and a slat provided with a container holding hole. And a container conveyer which is intermittently driven so as to sequentially stop the slats at the sealing station, a supply means for supplying a lid material onto the flange of the container held by the slats, and a stopping means at the sealing station. In a container sealing device having a container flange held by a slat and an elevating seal head that is pressed against the edge of the container holding hole on the upper surface of the slat via a lid material supplied on the flange, The diameter of the flange is less than or equal to the diameter of the flange, and is greater than or equal to the diameter of the upper end of the barrel wall, and it matches the lower surface of the bottom wall of the container held by the slat. A centering member that has an upward recess with a peripheral surface and a lower end of the barrel wall of the container held by the slats stopped at the sealing station The container is pushed up by the centering member at the time, and the centering member is moved up and down by a predetermined stroke so that the flange is separated from the edge of the container holding hole on the upper surface of the slat. To do.

In the container sealing device according to the present invention, since the diameter of the container holding hole is equal to or smaller than the diameter of the flange and larger than or equal to the diameter of the upper end portion of the body wall, the container holding hole does not require high precision and the slat is not required. Can be manufactured at low cost.

Further, the container sealing device is provided with an upward recess having an upwardly tapered peripheral surface that matches the peripheral surface of the lower end of the body wall of the container held by the slats and a bottom surface that receives the lower end of the same. The centering member and the container is held in the slat stopped at the sealing station to move the container into and out of the bottom wall of the container, and the centering member at the stroke upper limit pushes up the container. Since the flange is provided with an elevating means for elevating and lowering the centering member with a predetermined stroke so as to be separated from the edge of the container holding hole on the upper surface of the slat, it is assumed that the container body wall is inserted with a margin into the container insertion hole. Also, the container can be centered at the time of sealing by the centering member, and there is no concern that the design of the container and the lid material may be misaligned.

Another container sealing device according to the present invention is
A plurality of types of containers having different sizes, a container sealing device having a downwardly tapered barrel wall and a flange provided at the upper end thereof, the container sealing device having slats provided with container holding holes. , A container conveyor that is intermittently driven to stop at the sealing station, a supply means that supplies a lid material on the flange of the container held by the slat, and a slat that is stopped at the sealing station. In the container sealing device, which comprises a flange of the container and an elevating seal head that is pressed against the edge of the container holding hole on the upper surface of the slat via the lid material supplied thereon, the diameter of the container holding hole is maximum. Is larger than the diameter of the upper end of the body wall of the container and smaller than the diameter of the smallest flange of the container, and consists of a plurality of centering members corresponding to a plurality of types of containers and each centering is performed. The material has a plurality of centering means provided with an upward recess having an upward tapered peripheral surface that matches the lower peripheral surface of the body wall of the corresponding container, and a plurality of containers corresponding to the container held by the slats. A support member to which any one of the centering members is selectively attached detachably, and a recess for moving in and out of the lower end of the body wall of the container held by the slats stopped at the sealing station, and the upper stroke limit The container is pushed up by the centering member at the time, and the elevating means for elevating and lowering the supporting member with a predetermined stroke so that the flange thereof is separated from the edge of the container holding hole on the upper surface of the slat. It is a thing.

In another container sealing device according to the present invention, the diameter of the container holding hole is equal to or larger than the maximum diameter of the upper end of the body wall of the container and equal to or smaller than the minimum diameter of the flange of the container. The container can be held in the container holding hole.

Further, another container sealing device is composed of a plurality of centering members corresponding to a plurality of types of containers, and each centering member faces upwards so as to match the peripheral surface of the lower end portion of the body wall of the corresponding container. Any one of the plurality of centering members is selective to the centering means provided with an upward recess having a tapered peripheral surface and a bottom surface for receiving the lower end of the body wall, and the container held by the slats. To and from the lower end of the body wall of the container held by the slats stopped at the sealing station, and the centering member at the upper stroke limit pushes up the container. And the lifting means for moving the support member up and down with a predetermined stroke so that the flange is separated from the edge of the container holding hole on the upper surface of the slat. It can be a centering of the container during sealing by the corresponding centering member. Therefore,
It is possible to seal multiple types of containers of different sizes without replacing the slats.

[0013]

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

Referring to FIG. 3, a container C is a cup-shaped synthetic resin, and has a downwardly tapered barrel wall S and a flange F provided on the upper end thereof. Although not shown, a plurality of types of containers having different sizes are prepared in addition to the illustrated container.

The lid member L is a roll made of polyethylene film. The cover material has a pattern (not shown)
It is drawn to correspond to each container.

Referring to FIGS. 1 and 2, a container sealing device includes a container transfer conveyor 11 extending through a sealing station, a sealing unit 12 disposed above a container transfer path at the sealing station, and a sealing station. It is provided with a lid material feeding device 13 for feeding the lid material L so as to traverse the upper side of the container C carried in, and a centering unit 14 arranged below the container transport path at the sealing station.

The container transporting conveyor 11 is a slat conveyor, and has a large number of slats 22 suspended on a pair of chains 21, and is driven intermittently so that the slats 22 are sequentially stopped at a sealing station. . Slat
Six circular penetrating container holding holes 23 are provided in the side wall 22 in the slat length direction. The diameter of the container holding hole 23 is equal to or larger than the diameter of the upper end of the body wall S of the largest container C of the plurality of types of containers C and is equal to or smaller than the diameter of the flange F of the smallest container C.
As a result, all types of containers C are
The body wall S is inserted so that the lower part of the slat 22 protrudes below the slat 22, and the flange F is received by the edge of the container holding hole 23 on the upper surface of the slat 22 so as to be held. In the example shown in FIG. 3, there is a gap between the outer surface of the container body wall S and the peripheral surface of the container holding hole 23, but the container C can freely move within the container holding hole 23 by the amount of the gap. ing.

The seal unit 12 includes a gate-shaped frame 31 provided so as to straddle the container transport path at the seal station, a horizontal top plate 33 suspended from the top of the frame 31 by a rod 32, and a top plate. Six fluid pressure cylinders 35 which are vertically aligned downwardly on top of each other and which extend through the top plate 33 so that the piston rods 34 penetrate the top plate 33, and the piston rods 34 of these fluid pressure cylinders 35 Six sealing heads 36, each mounted with a heater and trimming cutter (not shown), and slats carried into the sealing station
The bottom surface of the container 22 is provided with slat receivers 37 provided in contact with both sides of each container holding hole 23.

The lid material feeding device 13 has a pair of guide rollers 41 and 42 arranged upstream and downstream of the sealing station and around which the lid material L is wound.

The centering unit 14 is a fluid pressure cylinder 51 disposed vertically upward and obliquely below the upstream side of the slat 22 carried into the sealing station with the container conveying path interposed therebetween.
A horizontal elevating bar 53 placed on the piston rod 52 of the fluid pressure cylinder 51, and a tip extending from the elevating bar 53 toward the downstream side is positioned immediately below each container holding hole 23 of the slat 22. One support arm 54 and these support arms
A centering ring 55 is detachably attached to the upper surface of the tip of 54.

A bolt hole 56 is provided at the tip of the support arm 54, and a screw hole 57 that matches the bolt hole 56 is provided in the centering ring 55. The centering ring 55 is attached to the support arm 54 by screwing the bolt 58 into the screw hole 57 through the bolt hole 56.

One recess 61 is formed by the upper surface of the tip of the support arm 54 and the inner peripheral surface of the centering ring 55. The recess 61 is concentric with the container holding hole 23 of the slat 22 carried into the sealing station and coincides with the lower end of the outer surface of the container body wall S. have.

As shown in FIG. 4 (a), when the slat 22 is loaded into the sealing station, the sealing head 36
Is held at the upper limit and the centering ring 55 is held at the lower limit. When the slats 22 are loaded and stopped at the sealing station, as shown in FIG.
The centering ring 55 is raised together with 4. When the container body wall S is eccentric with respect to the centering ring 55, the container C is centered by the peripheral surface 62 of the centering ring 55 in the course of the ascent process of the centering ring 55 so that the container C is distracted from it. The centering operation is performed while being horizontally moved so as to be concentric with the centering ring 55. When the centering ring 55 rises to near the upper limit, the bottom of the container C is received by the bottom surface 63 of the recess, and thereafter the container C is pushed up by the centering ring 55. When the centering ring 55 rises to the upper limit, the flange F of the container C is slightly separated from the peripheral portion of the container holding hole 23 on the upper surface of the slat 22. The distance H is about 1 mm. In this state, as shown in FIG. 4 (c), the seal head 36 is lowered. The lowered seal head 36 forcibly pushes down the lid member L and the flange F, and is pressed against the peripheral portion of the container holding hole 23 on the upper surface of the slat 22 via both of them. As a result, the lid material L is heat-sealed to the flange F, and at the same time, the portion which will be the lid is punched out.
After this, the centering ring 55 is lowered, and the slat 22 holding the lidded container C is carried out from the sealing station.

FIG. 5 shows three types of centering rings 71, 72, 73 for accommodating three types of containers having different sizes. In FIG. 5, the peripheral surfaces of the centering rings 71, 72, 73
The lower end diameters of 74, 75 and 76 are D1 <D2 <D3.

FIG. 6 shows a centering cup 81 which replaces the centering ring. The centering cup 81 has an upward recess 82. The recess 82 has an upwardly tapered peripheral surface 83 and a bottom surface 84.

In the above description, a roll film is used as the lid material, but instead of this, a lid material punched into a shape to be a lid in advance may be used.

[0027]

According to the present invention, since the processing of the container holding hole does not require high precision, the slats can be manufactured at low cost.

Further, even if the container wall is inserted through the container insertion hole with a margin, the container can be centered at the time of sealing by the centering member, so that the design of the container and the lid material may be misaligned. There is no.

Further, it is possible to carry out the sealing work of a plurality of types of containers having different sizes without replacing the slats.

[Brief description of the drawings]

FIG. 1 is a front view of a container sealing device according to the present invention.

FIG. 2 is a perspective view including a crushed section of the sealing device.

FIG. 3 is an enlarged sectional view of a main part of the sealing device.

FIG. 4 is an explanatory diagram of a sealing operation by the sealing device.

FIG. 5 is a sectional view of a centering member for accommodating a plurality of types of containers having different sizes.

FIG. 6 is a sectional view showing a modification of the centering member.

[Explanation of symbols]

 11 Conveyor 22 Slat 23 Container holding hole 36 Seal head 54 Support member 55 Centering member 61 Recess 62 Peripheral surface of recess C Container S Container shell wall F Container flange L Lid

Front page continued (72) Inventor Hiroyuki Wakaki Taro Hachisu, Kitajima-cho, Itano-gun, Tokushima Prefecture 1 Nishinokawa No. 1 Shikoku Kakoki Co., Ltd. 1 Shikoku Kakoki Co., Ltd. at 10 West River

Claims (2)

[Claims] 1. A sealing device for a container C having a downwardly tapered body wall S and a flange F provided at an upper end thereof, which has a slat 22 provided with a container holding hole 23 and seals the slat 22. The container conveying conveyor 11 is driven intermittently so as to be sequentially stopped at the station, and the lid material L is provided on the flange F of the container C held by the slat 22.
Is pressed against the edge of the container holding hole 23 on the upper surface of the slat 22 via the flange F of the container C held by the slat 22 stopped at the sealing station and the lid material L supplied thereon. In the container sealing device including the lifting and lowering sealing head 36, the diameter of the container holding hole 23 is equal to or smaller than the diameter of the flange F and larger than or equal to the diameter of the upper end of the body wall S, and the container holding hole 23 is held by the slat 22. It is held by a centering member 55 provided with an upward recess 61 having an upward tapered peripheral surface 62 that matches the lower peripheral surface of the body wall S of the container C, and by the slats 22 stopped at the sealing station. The recess 61 is moved in and out of the lower end of the body wall S of the container C, and the container C is pushed up by the centering member 55 at the time of the upper limit of the stroke so that the flange F has the edge of the container holding hole 23 on the upper surface of the slat 22. Away from The centering member 55 as sera and a lifting means for lifting a predetermined stroke, the seal device of the container, characterized in that. 2. A sealing device for a plurality of types of containers C having different sizes, the container C having a downwardly tapered body wall S and a flange F provided at an upper end thereof, the container holding hole 23 And a lid material L on the flange F of the container C held by the slat 22, and the container transport conveyor 11 having slats 22 provided with the slats 22 and being intermittently driven so as to sequentially stop the slats 22 at the sealing station.
Is pressed against the edge of the container holding hole 23 on the upper surface of the slat 22 via the flange F of the container C held by the slat 22 stopped at the sealing station and the lid material L supplied thereon. In the container sealing device including the lifting and lowering sealing head 36, the diameter of the container holding hole 23 is equal to or larger than the diameter of the upper end of the body wall S of the largest container C, and the diameter of the flange F of the smallest container C. It is the following and is composed of a plurality of centering members 55 corresponding to a plurality of types of containers C, and each centering member 55 has an upwardly tapered peripheral surface 62 that matches the peripheral surface of the lower end portion of the body wall S of the corresponding container C. Corresponding to the container C held by the slat 22 and the centering means provided with the upward recess 61 having the above-mentioned recess 61, any one of the plurality of centering members 55 is selectively and detachably attached. 54, stop at the sealing station The recess 61 is moved in and out of the lower end of the body wall S of the container C held by the slats 22 and the flange C of the container C is pushed up by the centering member 55 at the upper limit of the stroke so that the flange F of the container 22 is slid. A container sealing device comprising: an elevating means for elevating and lowering the support member 54 in a predetermined stroke so as to be separated from the edge of the container holding hole 23 on the upper surface.