JP3366850B2 - How to close the mouth of a container - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for closing the mouth of a container, and more particularly, for example, a drum can for storing petroleum, kerosene and various other raw materials, a bottle, a can for packaging foods, pharmaceuticals, cosmetics, etc. Temporarily attach the lid to the mouth of various other containers to temporarily block the mouth of the container to prevent foreign matter from entering the container and keep the container hygienic during transportation or handling. The present invention relates to a method for closing the mouth of a container, which can be held at the same time and can easily peel off the temporarily attached lid when filling the container with the contents.

[0002]

2. Description of the Related Art FIG. 17 (A) is a rear view of a label-like temporary lid used in a conventional "method of temporarily closing a container mouth" as a background of the present invention, and FIG. 17 (A) is a cross-sectional view taken along line XVII (B) -XVII (B) of FIG. FIG. 18 is a front view showing a state in which the label-like temporary lids of FIGS. 17A and 17B are temporarily attached to a release paper. In this conventional container lid temporary closure method, the adhesive is applied in a striped manner on the adhesive surface of the label-like temporary lid so that the opening of the container mouth communicates with the outside air. is there. That is,
The label-like temporary lid 1 used in the conventional method for temporarily closing the container mouth portion includes a base material 3. On the back surface of the base material 3, a pressure-sensitive adhesive layer 5 is formed by applying a pressure-sensitive adhesive in a stripe pattern in plan view. In this case, on the back surface of the base material 3, the pressure-sensitive adhesive layer 5 coated with the pressure-sensitive adhesive and the pressure-sensitive adhesive lacking portion 7 disposed between the pressure-sensitive adhesive layers 5 and 5 and not coated with the pressure-sensitive adhesive alternate. Is installed in.

In the conventional label-like temporary lid 1 used in the conventional method of temporarily closing the mouth of the container, the adhesive layer 5 is formed in a striped pattern on the adhesive surface of the label-like temporary lid 1. The inside of the container attached to the portion communicates with the outside air via the adhesive lacking portion 7 where the adhesive layer 5 is not formed. Therefore, the pressure difference inside the container disappears, and the label-like temporary lid is not peeled off from the container opening or pulled into the container due to the pressure difference inside and outside the container.

[0004]

However, in the conventional method of temporarily closing the container mouth, the label-like temporary lid 1 is initially attached when the label-like temporary lid 1 is attached to the mouth of a container such as a drum can. Since the portion where the striped pressure-sensitive adhesive layer 5 is not formed, that is, the pressure-sensitive adhesive lacking portion 7 is also located in the portion to be bonded, the initial bonding is not so good, for example, in the winter season. When the mouth of the container is cold,
Poor initial adhesion. In this case, the label-like temporary lid 1
Cannot be reliably attached to the mouth of the container, and the label-like temporary lid 1 is wastefully consumed, which is uneconomical. This is because the adhesive surface of the temporary label lid 1 is formed in a striped pattern by the adhesive layer 5 and the adhesive lacking portion 7.

That is, in the conventional label-like temporary lid 1 used in the conventional method for temporarily closing the container mouth, as shown in FIGS.
As shown in (B) and FIG. 18, the pressure-sensitive adhesive layer 5 and the pressure-sensitive adhesive lacking portion 7 are formed parallel to the feeding direction of the label-like temporary lid 1. In particular, as shown in FIG. 18, the plurality of label-like temporary lids 1 are separated by a pressure-sensitive adhesive layer 5 at a constant interval from the release paper 9.
The striped pressure-sensitive adhesive layer 5 and the pressure-sensitive adhesive lacking portion 7 are formed in parallel along the length direction (feeding direction) of the release paper 9 when temporarily attached in the length direction of the release paper 9. This is because when the adhesive is applied to the label-like temporary lid 1, the adhesive is applied endlessly in the feeding direction of the label-like temporary lid 1 to form the striped adhesive layer 5
This is due to the manufacturing constraint that the must be formed.

Further, since the label-like temporary lid 1 used in the conventional method of temporarily closing the container mouth has the adhesive lacking portion 7, the adhesive force becomes weak when viewed from the entire adhesive surface. . Therefore, when the conventional label-like temporary lid 1 is attached to the mouth portion of the container, the label-like temporary lid 1 may be peeled off from the mouth portion of the container earlier than a predetermined closing time. Explaining this in the manufacturing process of a drum can, for example, before applying a predetermined coating treatment to the outer surface of the drum can, a conventional label-like material is applied to the periphery of the mouth to prevent the paint from entering the drum can through the mouth of the drum can. When the temporary lid 1 was attached, there was a risk that the label-like temporary lid 1 temporarily attached to the mouth of the drum can was inadvertently peeled off for a predetermined closing time, that is, before the coating was completed.

Therefore, the main object of the present invention is to provide excellent initial adhesion when the lid is temporarily attached to the mouth of the container, and the lid is inadvertently removed until the lid is intentionally peeled off. It is an object of the present invention to provide a method for closing the mouth of a container in which the body does not come off from the mouth of the container.

[0008]

SUMMARY OF THE INVENTION The method of closing the mouth of a container according to the present invention is a peeling method for automatically covering the mouth of a container in a series of work steps in which a large number of containers are continuously handled. A method for closing the mouth of a container by temporarily attaching an easy label-like lid to the peripheral edge of the mouth of the container and temporarily closing the mouth of the container, wherein the lid includes a base material and a base. Full area of one main surface of the material
A pressure-sensitive adhesive layer formed in the region , and a pressure-sensitive adhesive layer, which is formed in one region of the surface of the pressure-sensitive adhesive layer, and includes an adhesion weakening layer that weakens the adhesive force of the pressure-sensitive adhesive layer. This is the method of closing the mouth. The lid is made up of the base material and the entire main surface of the base material.
An adhesive layer formed by coating a pressure sensitive adhesive in the region, is formed on one region of the surface of the adhesive layer, and a bonding strength weakened layer to weaken the strength of the adhesive strength of the adhesive layer, the adhesive force weakened Advantageously, the layer reaches the outer periphery of the substrate and is formed in an area of about one third of one main surface of the substrate. The adhesion weakening layer may be formed so as to be dotted in a region of the surface of the adhesive layer. The adhesion weakening layer is a part of the surface of the adhesive layer.
It may be formed by forming a synthetic resin in the region.
Further, the adhesion weakening layer may be formed by printing / applying a printing ink on a region of the surface of the adhesive layer.

The lid used in the method for closing the mouth of a container according to the present invention is such that if the surface of the pressure-sensitive adhesive layer is slightly pressed to the peripheral edge of the mouth of the container, the lid is closed by the pressure-sensitive adhesive layer. Temporarily attached to the peripheral edge of. Since the lid is only temporarily attached to the peripheral edge of the mouth of the container, the lid is easily peeled and removed from the peripheral edge of the mouth of the container when the lid is peeled off. Further, in the method of closing the mouth of the container according to the present invention,
In particular, pressure sensitive adhesive layer is formed on the entire area of one surface of the base material of the lid, further, since the adhesive force weakened layer on one region of the surface of the pressure sensitive adhesive layer is formed, a conventional The initial adhesion is improved as compared with a label-like temporary lid used in the method for temporarily closing the container mouth portion, in which the adhesive-free portion is provided between the striped adhesive layers. Furthermore, since the lid used for the method for closing the mouth of the container according to the present invention does not have any adhesive lacking portion formed on the conventional label-like temporary lid, when viewed from the entire adhesive surface of the lid, , The adhesive maintenance power is higher than that of the conventional label-like temporary lid. Therefore, even after the lid body is temporarily attached to the mouth portion of the container, there is no fear that the lid body will be peeled off from the container mouth portion earlier than the desired closing time of the container mouth portion as in the prior art. Also, one of the surfaces of the pressure-sensitive adhesive layer of the lid is
Since the adhesive weakening layer is formed in the area, when the lid is temporarily attached to the mouth of the container, the adhesive weakening layer portion of the lid and the opening of the container mouth are simultaneously formed when the lid is temporarily attached. A ventilation path is formed between the part and the part. Therefore, when the lid is temporarily attached to the mouth of the container, even if the pressure inside the container becomes higher or lower than the atmospheric pressure, the inside and the outside of the container communicate with each other through the flow passage. That is, the atmosphere circulates through the adhesive strength weakening layer portion formed on one region of the surface of the pressure-sensitive adhesive layer, and the pressure difference between the inside and the outside of the container disappears. Therefore, in the method of closing the mouth of the container according to the present invention, the lid is pressed from the inside of the container due to the pressure difference between the inside and the outside of the container and peels off from the mouth of the container, or the lid is sucked into the mouth of the container. Absent.
Furthermore, in the method for closing the mouth of a container according to the present invention, after forming a pressure-sensitive adhesive layer on the entire area of one main surface of the substrate,
In order to form the adhesion weakening layer on a region of the surface of the pressure-sensitive adhesive layer, the formation position of the pressure-sensitive adhesive layer and the adhesion weakening layer on the adhesion surface of the lid, one main surface of the base material It is possible to appropriately change the ratio to the ratio.

The above-mentioned objects, other objects, features and advantages of the present invention will be more apparent from the following detailed description of the embodiments of the invention with reference to the drawings.

[0011]

DETAILED DESCRIPTION OF THE INVENTION

1 is a rear view showing a label-like lid used in the method for closing the mouth of a container according to the present invention.
FIG. 2 is a sectional view taken along line II-II in FIG. 1. FIG. 3 is a cross-sectional view of essential parts showing a state in which the lid body shown in FIGS. 1 and 2 is temporarily attached to the mouth portion of the drum can. Further, FIG. 4 is a plan view solution showing an example of a lid automatic temporary attachment device used for carrying out the container mouth closing method according to the present invention, and FIG. 5 is a front view solution thereof. FIG. 6 is an illustrative view of the lid automatic temporary attachment device of FIG. 5 as seen from the direction of arrow VI, and FIG. 7 is an illustration of the lid automatic provisional attachment device of FIG. 5 as seen in the direction of arrow VII. It is a figure. In this embodiment, as an example of the method for closing the mouth of a container according to the present invention, for example, in a drum can painting process, a label-like lid is attached to two large and small mouths of a drum can by a lid automatic temporary attachment device before painting. A method of temporarily attaching and temporarily closing the mouth of the drum will be described.

First, the label-like lid 10 used in the container mouth closing method according to the present invention will be described.
The label-like lid 10 applied to this embodiment includes a circular base material 12 made of, for example, a synthetic resin material. Base material 12
A pressure-sensitive adhesive layer 14 is formed on the entire back surface of the.
The pressure-sensitive adhesive layer 14 is formed by applying a pressure-sensitive adhesive on the entire back surface of the base material 12 and drying it. Furthermore, an adhesive strength weakening layer 16 that weakens the adhesive strength of the pressure-sensitive adhesive layer 14 is formed on a part of the surface of the pressure-sensitive adhesive layer 14 in a half-moon shape as a whole. The adhesion weakening layer 16 reaches the outer peripheral edge of the base material 12 and is formed in an area of about one third of the entire back surface of the base material 12.

In this case, one straight line is formed at the boundary between the portion where the adhesion weakening layer 16 is formed and the portion where the adhesion weakening layer 16 is not formed. Further, when the adhesion weakening layer 16 is viewed macroscopically, as shown in an enlarged view in a portion surrounded by a circle by a dashed line in FIG.
The dot-like adhesion weakening layers 16 are scattered at appropriate intervals to form a polka dot pattern. The adhesion weakening layer 16 is a paint,
It is made of printing ink, synthetic resin material, or the like.

In this embodiment, the adhesive weakening layer 16 is formed by applying a transparent varnish on a predetermined portion of the surface of the pressure-sensitive adhesive layer 14 by a method such as a screen printing method and drying it. The ratio of the mesh (mesh) by the screen printing method is, for example, 50% mesh, 60%
A mesh such as a mesh is used.

In this embodiment, since the adhesive strength weakening layer 16 is formed by the screen printing method, the number and shape of the meshes in the screen printing can be changed as appropriate.
The rough density of the adhesive strength weakening layer 16 can be adjusted. Therefore, in this example, the adhesive force of the adhesive force weakening layer 16, in other words, the peeling force can be controlled.
Therefore, when the lid 10 used in this embodiment is temporarily attached to the peripheral edges of the two large and small mouths A and B of the drum W as shown in FIG. Is possible.

Further, in this embodiment, the adhesive strength weakening layer 16 is changed by changing the printing pattern of the adhesive strength weakening layer 16.
1 (the part corresponding to the right side in FIG. 1) and the part without the adhesion weakening layer 16 (the left side in FIG. 1).
(4 parts), it is possible to adjust the formation position, the formation ratio, etc., so that they can be appropriately changed according to the shapes and sizes of the mouth portions A and B of the drum can W.

Next, the automatic lid temporary attachment device 20 of this embodiment, which is used to carry out the method for closing the mouth of a container according to the present invention, will be described. The lid automatic temporary attachment device 20 is
It is roughly divided into three: a preliminary positioning station 22, a lid temporary attachment station 24, and a lid temporary attachment defective product discharge station 26. Automatic lid temporary attachment device 20
Includes a housing 28 that encloses the features of the previous three stations 22, 24, 26. Housing 2
Reference numeral 8 denotes a preliminary positioning station 22, a lid temporary attachment station 24, and a lid temporary attachment defective product discharge station 26.
Has a plurality of frames 30 surrounding various mechanical devices and the like included in FIG. On the lower side of the housing 28, there is arranged a conveying means 32 including a conveyor system including a chain conveyor 32a. The drum can W is, for example, as shown in FIGS. 4 and 5, each of the stations 22, 24, 26.
Are conveyed in that order on the chain conveyor 32a from the right side (upstream side) to the left side (downstream side).

Below the preliminary positioning station 22, as shown in FIGS. 4, 8 and 10, a drum can W is provided.
For example, three support rollers 34, 36, 38 are provided as support members for supporting the. Three support rollers 3
4, 36 and 38 are arranged on the outer side in the width direction of the chain conveyor 32a at intervals in a generally triangular shape in a plan view.
One support roller 34 is rotatably formed by a roller driving unit 40 including a motor 40a with a brake and a speed reducer (not shown). The other two support rollers 3
6, 38 are formed as free rollers. The bottom surface of the drum can W can be supported at three points by the three support rollers 34, 36, and 38. Three support rollers 3
The lifters 42, 36, and 38 are arranged to be movable up and down. The three support rollers 34, 36, 38 are, for example, as shown in FIG.
On top of each other by bracket members 46. The attachment plate 44 is displaced together with the three support rollers 34, 36, 38 so as to be movable up and down by operating the lifter 42.

Further, as shown in FIGS. 4, 5, 8, 9 and 11, etc., two stopper rods 48, 48 are provided below the pre-positioning station 22 at intervals in the width direction. It is arranged. Two stopper rods 4
The cylinders 8 and 48 are vertically movable by cylinders 50 and 50 arranged on the inner surface of the chain conveyor 32a in the width direction. The two stopper rods 48, 48 are
Lifter 4 is stopped at the elevated position.
It is controlled so that when 2 goes up, it goes down.

On the upper side of the pre-positioning station 22, as shown in FIGS. 5, 6 and 10, etc., the rotation assisting member 5 including a pressing roller 52a made of an elastic material or the like.
2 are provided. The rotation assisting member 52 is disposed above the supporting roller 34 and assists the rotation of the drum can W. That is, the rotation assisting member 52 is used for the lifter 4
After 2 is raised, the one support roller 34 is rotationally driven to cooperate with the other two support rollers 36 and 38,
It has a function of stabilizing the initial rotation of the drum can W when starting to rotate the drum can W. In other words, the rotation assisting member 52 has a function of preventing slippage during initial rotation of the drum can W. The pressing roller 52a of the rotation assisting member 52 is controlled so that it immediately rises when the drum can W rotates.

Further, above the pre-positioning station 22, a drum can W is installed on the pre-positioning station 22.
As a sensor for detecting that it has been conveyed inside, for example, a transmission type photoelectric sensor 54 having a light projector 54a and a light receiver 54b is arranged. In this photoelectric sensor 54, in particular, as shown in FIG. 4, one frame 30 in which the projector 54 a extends in the length direction of the upper portion of the housing 28.
And the light receiver 54b is arranged on the other frame 30 so as to face the light projector 54a. The photoelectric sensor 54 operates when the drum can W is conveyed to the optical path between the light projector 54a and the light receiver 54b and the optical path is blocked. When the photoelectric sensor 54 is not operating, that is, when the drum can W is not conveyed to the optical path between the light projector 54a and the light receiver 54b, the two stopper rods 48, 48 are raised.

Further, on the upper side of the preliminary positioning station 22, as shown in FIGS. 5, 6 and 10, etc., the opening of the smaller mouth portion B of the drum can W conveyed into the preliminary positioning station 22. As a sensor for detecting b, for example, a diffuse reflection photoelectric sensor 56 including a light projector and a light receiver is provided. This photoelectric sensor 56 is, in particular, as shown in FIG. 5, in order to position the smaller mouth portion B of the drum can W at a predetermined position, that is, at the opening b of the mouth portion B. It is arranged above.

In the automatic lid temporary attachment device 20 of this embodiment, by detecting the opening b of the smaller mouth B of the drum can W, the two large and small mouths A and B of the drum can W are automatically detected.
The preliminary positioning of the openings a and b is performed.
Normally, the distance from the center line of the drum can W to the center line of the larger mouth portion A and the distance from the center line of the drum can W to the center line of the smaller mouth portion B are different. In this case, the distance from the center line of the drum can W to the center line of the smaller mouth part B is larger than the center line of the drum can W from the center line A of the drum can W.
Longer than the distance to the center line. With this in mind,
In the automatic lid temporary attachment device 20 of the present embodiment, the photoelectric sensor 56
Is arranged above the opening b of the mouth B of the smaller side of the drum can W.

That is, in the photoelectric sensor 56 applied to this embodiment, the smaller mouth portion B of the drum can W is located below the photoelectric sensor 56.
When the opening b is located, the light emitted from the projector passes through the opening b of the mouth B, so that the light receiver cannot detect the reflected light. On the contrary, when the circumferential orbit of the same radius as the opening a of the larger opening A of the drum can W is located below the photoelectric sensor 56, the light emitted from the projector hits the upper surface of the drum can W and its reflected light is reflected. Is sensed by the light receiver and the photoelectric sensor 56 is activated.

In the automatic lid temporary attachment device 20 of this embodiment, while the photoelectric sensor 56 is operating, the drum can W is rotated and the operation of the photoelectric sensor 56 is stopped, that is, the photoelectric sensor 56, as will be described later. When the opening b of the smaller mouth B of the drum can W is located below the sensor 56, the rotation of the drum can W is stopped, and the openings a of the large and small mouths A and B of the drum can W are automatically generated. , B is preliminarily positioned. Therefore, the preliminary positioning of the drum can W is performed in the preliminary positioning station.

Above the lid temporary attachment station 24, as shown in FIGS. 4 to 7 and FIGS.
Holding the peripheral edges of the two large and small mouths A and B, the mouths A and B
A guide chuck portion 60 for finally positioning the is disposed. The guide chuck part 60 includes a rectangular mounting plate 62.
including. Below the mounting plate 62, positioning chucks 64a, 64b and 66a, 66 for positioning the larger mouth portion A and the smaller mouth portion B of the drum can W are positioned.
b are arranged at intervals in the length direction of the mounting plate 62. Positioning chuck opening / closing cylinders 68 and 70 are provided on the lower surface of the mounting plate 62 at one end side and the other end side in the length direction thereof, respectively.

Positioning chucks 64a, 64b and 6
6a and 66b are formed by positioning chuck opening / closing cylinders 68 and 70, respectively, so as to be movable back and forth in a direction in which the larger mouth portion A and the smaller mouth portion B of the drum can W are clamped and tightened. It
Positioning chucks 64a, 64b and 66a, 66b
Are fixing brackets 72a, 72b and 7 respectively.
4a and 74b allow the rods 76a, 76b and 78a of the positioning chuck opening / closing cylinders 68 and 70,
It is fixed to 78b.

Further, the positioning chucks 64a, 64b
And 66a and 66b are vertically movable by a positioning chuck elevating cylinder 80 arranged above the mounting plate 62. Positioning chuck lifting cylinder 8
0 is supported by a frame 30 extending in the length direction of the upper portion of the housing 28 by a bracket including a mounting member 82 or the like. In this case, the bracket plate 84 of the mounting member 82
Are provided with two flange-shaped guide posts 86, 86 at intervals in the length direction. The lower end of the rod 81 of the positioning chuck elevating cylinder 80 is attached to the approximate center of the mounting plate 62. Further, guide rods 88, 88 that slide in the guide posts 86, 86 are attached to the upper surface of the mounting plate 62. Further, a pressing plate 92 is arranged in the center of the lower surface of the mounting plate 62 via a flange portion 90.

Further, two large and small mouth portions A of the drum can W,
In order to close the openings a and b of the mouths A and B, label-shaped lids 10A and 10B are provided on the upper side of the mouths A and B.
Labeling machines 94A and 94B that are temporarily attached to the peripheral edge of the are installed. The labeling machines 94A and 94B are appropriately attached to the frame 30 above the housing 28 by a mounting bracket or the like. The lids 10A and 10B have the same structure as the lid 10 shown in FIGS. 1, 2 and 3, and correspond to the openings a and b of the two large and small mouths A and B of the drum can W, respectively. It has a size and a shape. Further, the two labeling machines 94A and 94B have the same structure as a general labeling machine.

Further, on the upper side of the lid temporary attachment station 24, lid temporary attachment devices 96A and 96B are arranged. Lid temporary attachment devices 96A and 96B include lid temporary attachment cylinders 98A and 98B, respectively. Lid temporary mounting cylinder 98A, 9
The 8B rods 99A and 99B are provided with suction holding plates 100A and 100B having suction holes (not shown) on their lower surfaces. The suction holding plates 100A and 100B are vertically displaced by the operation of the lid temporary attachment cylinders 98A and 98B. The suction holding plates 100A and 100B are
Lid supply parts 94a, 9 of the labeling machines 94A, 94B
4b, labeling machines 94A, 94B
The label-like lids 10A and 10B supplied from the above are appropriately suction-held. Lid temporary mounting cylinder 98A, 98B
Of the suction holding plate 100A, 100B while holding the lid body 10A, 10B on the lower surface of the suction holding plate 100A, 100B.
00A and 100B descend together with the rods 99A and 99B and press the two large and small mouth portions A and B of the drum can W. Therefore, the lids 10A and 10B are temporarily attached to the peripheral edges of the two large and small mouths A and B of the drum can W by the pressure-sensitive adhesive layer 14 on the back surface thereof.

Below the lid temporary attachment station 24, as shown in FIGS. 9 and 11, three support rollers 1 are provided.
02 is provided. These support rollers 102 are the support rollers 3 arranged at the pre-positioning station 22.
It is a free roller having the same structure as 6, 38. Three
The one support roller 102 is fixed on an attachment plate 106 having an inverted T shape by a bracket member 104. The three support rollers 102 are arranged so that they can be raised and lowered by a lifter 108.

Further, two stopper rods 110, 110 having the same structure and function as the stopper rods 48, 48 arranged in the preliminary positioning station 22 are arranged below the lid temporary attachment station 24. . That is, the two stopper rods 110, 110
Is formed by cylinders 112, 112 so as to be able to move up and down, is normally stopped at an ascended position, and is controlled so as to descend when the lifter 106 ascends.

On the upper side of the lid temporary attachment station 24, as shown in FIG. 4, a pre-positioning station 22 is provided as a sensor for detecting the drums W conveyed into the lid temporary attachment station 24. A photoelectric sensor 114 having the same function as the arranged photoelectric sensor 54 is provided.

Below the lid temporary attachment defective product discharge station 26, the drum can W (lid temporary attachment defective product) to which the lids 10A and 10B have not been temporarily attached is removed from the transport path to another place. For example, two discharge rollers 116, 116 are provided as defective product discharging means for transferring. As shown in FIGS. 4, 5, 16 and the like, the two discharge rollers 116, 116 are formed at intervals in the width direction of the chain conveyor 32a. The two discharge rollers 116, 116 are attached to the housing 2 by a support bracket 118 having a substantially U shape.
It is held on the lower frame 30 of the frame 8. Discharge roller 11
Both ends of the shafts 6 and 116 in the axial direction are rotatably supported by both ends of the support bracket 118 in the length direction. The length of the two discharge rollers 116, 116 in the axial direction is longer than the diameter of the drum can W. In particular, one discharge roller 116 is driven to rotate the discharge roller 116 itself in both forward and reverse directions. Rotation drive unit (not shown)
Is built in. Further, the support bracket 118 is
The lifter 120 supports the lifter 120 so that it can be moved up and down.

Further, under the lid temporary attachment defective product discharge station 26, two stopper rods 122, 122 are provided at intervals in the width direction of the chain conveyor 32a below the stations 24 and 26 as in the previous stations 24 and 26. Are arranged so that they can be moved up and down by the cylinders 124, 124. And the two stopper rods 122, 122 are always
Although the lifter 120 is stopped in an ascended state, it is controlled so as to descend when the lifter 120 ascends.

Further, a roller conveyor 126 is disposed below the lid temporary attachment defective product discharge station 26 in a direction orthogonal to the feeding direction of the chain conveyor 32a. At this lid temporary attachment defective product discharge station 26, when the lifter 120 is lifted up, the two discharge rollers 116, 116 are arranged so that the lid temporary attachment defective product discharge station 2 is provided.
By supporting the bottom surface of the drum can W that has been conveyed into the inside of the drum 6 and rotating one of the exclusion rollers 116, the drum can W can be transferred to another place via the roller conveyor 126.

In addition, the lid temporary defective product discharge station 2
As shown in FIG. 4, a sensor for detecting the drum can W that has been conveyed into the lid temporary attachment defective product discharge station 26 is provided on the upper side of 6 as the above stations 22, 2 respectively.
A photoelectric sensor 128 having the same function as the photoelectric sensors 54 and 114 arranged in No. 4 is arranged.

Further, as shown in FIG. 5, above the lid temporary defective attachment discharge station 26, two large and small mouth portions A of the drum can W conveyed into the lid temporary defective discharge station 26 are provided. , B, photoelectric sensors 130, 132 similar to the photoelectric sensor 56 arranged in the preliminary positioning station 22, for example, are provided as sensors for detecting whether or not the lids 10A, 10B are correctly and temporarily attached. . One photoelectric sensor 130 is arranged above the larger mouth portion A of the drum can W, and the other photoelectric sensor 132 is arranged above the smaller mouth portion B of the drum can W.

When the lids 10A and 10B are accurately temporarily attached and the openings a and b of the mouths A and B of the drum can W are closed, the light emitted from the projectors of the photoelectric sensors 130 and 132 is covered. The photoelectric sensors 130, 13 are hit by hitting the bodies 10A, 10B and sensing the reflected light with a light receiver.
2 works. When the lids 10A and 10B are accurately temporarily attached to both the mouths A and B of the drum can W and the openings a and b of the mouths A and B are closed, the lifter 120 does not move up. Drum can W by chain conveyor 32a
Is transported to another station. Conversely,
If either one of the openings a and b of the mouths A and B of the drum can W is not accurately closed by the lids 10A and 10B, the lifter 120 moves up and the discharge rollers 116 and 1 are ejected.
16 transfers to a roller conveyor 126.

Next, a method of closing the openings a and b of the mouths A and B of the drum can W using the automatic lid temporary attachment device 20 of this embodiment will be described. The method of closing the mouth of the drum can of this embodiment is roughly divided into (1) a step of pre-positioning the drum at the pre-positioning station, and (2) accurately determining the two mouths of the big and small drums at the lid temporary attachment station. Positioning and temporarily attaching the lid 10 that temporarily closes the openings of the small and large mouths, and (3) attaching the lids to the large and small mouths at the defectively attached lid body discharge station. A step of inspecting whether or not the opening of the mouth is temporarily attached and closing the mouth, and removing the drum can W (defective temporarily attached lid) having no lid temporarily attached from the transport path to another station It is divided into three steps. The steps performed at each station will be described below.

(1) The pre-coating drum can W is carried on the chain conveyor 32a by the pre-positioning station carrying means 32. The drum can W is conveyed in the preliminary positioning station 22 in a state of standing upright with respect to the chain conveyor 32a. The transferred drum can W has two stopper rods 48,
Hit 48. Drum can W is stopper rod 48,4
When hitting 8, the lifter 42 rises. Lifter 42
When is raised, the stopper rods 48, 48 are lowered and the rotation assisting member 52 is lowered. In this case, the bottom surface of the drum can W is supported at three points by the three support rollers 34, 36, 38. Furthermore, the upper surface of the drum can W is
It is abutted and supported by the pressing roller 52a of the rotation assisting member 52. In that state, the drum can W is rotated by rotationally driving one support roller 34. When starting to rotate the drum can, the pressing roller 52a stabilizes the initial rotation of the drum can W and prevents the drum can W from slipping. After the rotation of the drum W, the rotation assisting member 5
2 rises immediately.

Next, when the photoelectric sensor 56 detects the position of the opening b of the smaller mouth B of the drum can W, the rotation driving of the support roller 34 is stopped. Therefore, the rotation of the drum can W is stopped and the lifter 42 is lowered. When the drum can W is lowered by lowering the lifter 42, the drum can W is again moved by the chain conveyor 32a.
Are transported to the next lid temporary attachment station 24. At this time, the drum can W is placed in the preliminary positioning station 22.
Is not located, the photoelectric sensor 54 does not detect the drum can W, so that the two stopper rods 48, 48 rise again and stand by.

(2) Lid temporary attachment station The drum can W that has been conveyed hits the two stopper rods 110, 110. When the drum can W hits the two stopper rods 110, 110, the lifter 106 rises. When the lifter 106 rises, the stopper rods 110, 110 descend and the positioning chuck elevating cylinder 80 descends. When the lifter 106 rises, the drum can W is sandwiched and supported from the vertical direction by the three support rollers 102 and the pressing plate 92 of the positioning chuck elevating cylinder.

Next, the positioning chuck opening / closing cylinder 70
Is activated, and the peripheral edge of the smaller mouth portion B of the drum can W is positioned by being clamped by the positioning chucks 66a and 66b. In this case, the positioning chuck 66
By tightening the mouth B, a and 66b
It also has the function of a guide member for accurately positioning. Then, the labeling machine 94B is operated, and the lid 10B for the mouth B of the drum can W is supplied from the lid supply unit 94b. Further, the lid temporary attachment cylinder 98B is operated, and the lid 10B is suction-held by the suction holding plate 100B. Further, as the lid temporary attachment cylinder 98B is lowered, the lid 10B is temporarily attached to the peripheral edge of the mouth B so as to close the opening b of the mouth B of the drum can W. After that, the holding state of the positioning chucks 66a and 66b is released by the positioning chuck opening / closing cylinder 70. After that, the lid temporary mounting cylinder 98B moves up and returns to the original state.

Then, the drum can W is subjected to the same operation process.
The lid 10A is temporarily attached to the mouth A of the larger opening
Is blocked. That is, the positioning chuck opening / closing cylinder 68 is operated, and the peripheral edge of the larger mouth portion A of the drum can W is positioned by being pinched by the positioning chucks 64a and 64b. And labeling machine 9
4A operates, and the lid 10A for the mouth portion A of the drum can W is supplied from the lid supply unit 94a. Further, the lid temporary mounting cylinder 98A is activated, and the lid 10A is attached to the suction holding plate 100A.
Are sucked and held. Further, as the lid temporary attachment cylinder 98A is lowered, the lid 10A is temporarily attached to the peripheral edge of the mouth A so as to close the opening a of the mouth A of the drum can W. Then, the holding state of the positioning chucks 64a and 64b is released by the positioning chuck opening / closing cylinder 68. Then, the lid temporary attachment cylinder 98A moves up and returns to the original state.

By the labeling machines 94A and 94B,
When the openings a and b of the two large and small mouths A and B of the drum can W are closed by the lids 10A and 10B, the lifter 106 descends. When the lifter 106 descends, the drum can descends, and the drum can is conveyed by the chain conveyor 32a to the next defective lid temporary attachment product discharge station 26. At this time, since the drum can W is not located in the lid temporary attachment station 24, the photoelectric sensor 54 does not detect the drum can W, so that the two stopper rods 110, 110 are not detected.
Will rise again and wait.

(3) Discharging Station for Defectively Attaching Lid Body The drum W that has been conveyed hits the two stopper rods 122, 122. When the drum can W hits the two stopper rods 122, 122, the lifter 120 moves up. When the lifter 120 moves up, the stopper rods 122, 122 move down. In addition, the photoelectric sensor 13
0, 132, two large and small mouths A of the drum can W,
It is detected whether or not the lids 10A and 10B are temporarily attached to B. When the lids 10A and 10B are not temporarily attached, the discharge rollers 116, 116 eject the drum can W, which is a defectively attached lid, to the roller conveyor 126. When the lids 10A and 10B are temporarily attached,
The lifter 120 does not move up and the drum can W is conveyed to the next station by the chain conveyor 32a. At this time, since the drum can W is not located in the lid temporary attachment defective product discharge station 26, the photoelectric sensor 128 does not detect the drum can W, and therefore the two stopper rods 122, 122 rise again and stand by. become.

In the automatic lid temporary attachment apparatus 20 of the present embodiment, the conveying means 32 such as a conveyor system including the chain conveyor 32a and the sensors 54, 56, 114, 128, 1 are provided.
30, 132, each stopper rod 48, 110, 12
Cylinders 50, 112, 124 for operating 2, lifters 42, 106, 120, roller driving unit 40 for driving support rollers 34, rotation assisting member 50 including pressing roller 52a, positioning chuck lifting cylinder 80, positioning chuck opening / closing cylinder 68 and 70, the labeling machines 94A and 94B, the lid temporary attachment devices 96A and 96B, and the operation / stop of the discharge roller 116 are controlled by sequence control.

That is, the automatic lid temporary attachment device 2 of this embodiment
In the method of closing the mouth of the drum can using 0, the openings a and b of the two large and small mouths A and B of the drum can W are covered with the lids 10A and 1A.
In order to achieve the purpose of temporarily blocking by 0B,
Program control is performed according to a predetermined input schedule. Program control is
A series of work programs are advanced in the correct order to achieve the desired result. In each of the stations 22, 24 and 26 described above, the next state to be shifted from a certain state in the middle of the work process is determined by both the current state and the input in the work process existing at that time. The trigger for the state transition is a so-called asynchronous type, which is given each time the input changes.

According to the method of closing the mouth of a drum can using the automatic lid temporary attachment device 20 of this embodiment, the lids 10A and 10B are used in a series of work steps for handling a large number of drums W.
Can easily be temporarily attached to the large and small openings A and B of the drum can W, so that the openings a and b of the openings A and B of the drum can W can be temporarily closed. Therefore,
It is possible to prevent foreign matter from entering the drum can W before the drum can W coating process, and the drum can W can be coated without any trouble.

Further, the automatic lid temporary attachment device 20 of this embodiment
According to the method of closing the mouth of the drum using the above-mentioned method, in particular, as shown in FIGS.
Since the pressure-sensitive adhesive layer 14 and the adhesive weakening layer 16 for weakening the adhesive strength of the pressure-sensitive adhesive layer 14 are formed on a part of the surface of the pressure-sensitive adhesive layer 14, the adhesive weakening layer is formed. 1
By the action of 6, a ventilation path can be formed between the lids 10A and 10B and the mouths A and B of the drum can W. That is, since the inside and the outside of the drum can W can be communicated with each other through the flow passage, the pressure difference between the inside and the outside of the drum can W is eliminated. Therefore, the lids 10A and 10B are not peeled from the mouths A and B of the drum can W or sucked into the drum can W due to the pressure difference between the inside and the outside of the drum can W.

[0052]

According to the present invention, excellent initial adhesion is achieved when the lid is temporarily attached to the mouth of the container, and the lid is inadvertently removed until the temporarily attached lid is intentionally peeled off. A method for closing the mouth of a container is obtained that does not separate from the mouth of the container. That is, the label-like lid used in the method of closing the mouth of the container according to the present invention does not have the adhesive lacking portion as in the prior art, so compared with the prior art,
The initial adhesion is improved, and even after the lid is temporarily attached to the mouth of the container, there is no risk of the lid being accidentally disengaged from the mouth of the container as in the conventional technique. Furthermore, the striped adhesive layer of the label-like temporary lid used in the conventional method of temporarily closing the container mouth,
While the label-like temporary lid temporarily attached to the release paper is formed endlessly in parallel with the length direction (feed direction) of the release paper between the front end and the rear end, the mouth of the container according to the present invention In the part closing method, the pressure-sensitive adhesive layer and the adhesive weakening layer of the label-like lid can be formed in an appropriate pattern in the arrangement and proportion in accordance with the shape of the mouth of the container. for that reason,
In the label-like lid used in the method of closing the mouth of the container according to the present invention, the adhesive force and the peeling force of the plurality of lids temporarily attached to the release paper can be adjusted. The strength of the adhesive force or the peeling force when temporarily attached to the mouth of the container can be appropriately controlled.

[Brief description of drawings]

FIG. 1 is a back view showing a label-like lid used in a method for closing the mouth of a container according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view of essential parts showing a state in which the lid body shown in FIGS. 1 and 2 is temporarily attached to the mouth portion of the drum can.

FIG. 4 is a schematic plan view showing an example of an automatic lid temporary attachment device used for carrying out the method for closing the mouth of a container according to the present invention.

5 is a front view solution view of the automatic lid temporary attachment device of FIG. 4. FIG.

6 is an illustrative view of the automatic lid temporary attachment device of FIG. 5 as seen from the direction of arrow VI.

7 is an illustrative view of the automatic lid temporary attachment device of FIG. 5 as seen from the direction of arrow VII.

FIG. 8 is a plan view solution diagram of a main part showing a positional relationship between a support roller and a drum in a preliminary positioning station and a rotation drive mechanism of the support roller.

FIG. 9 is an enlarged front view solution diagram of main parts showing the positional relationship between a drum can, a stopper rod, a lifter, and the like in a preliminary positioning station and a lid temporary attachment station.

FIG. 10 is a perspective view showing a main part of a rotating mechanism of a drum can in a preliminary positioning station.

FIG. 11 is a perspective view of a main part showing a state where a drum can is conveyed on a chain conveyor.

FIG. 12 is an enlarged front view showing a main part of a lid temporary attachment station.

FIG. 13 is an enlarged right side view showing a main part of the lid temporary attachment station.

FIG. 14 is an enlarged plan view showing a main part of the positioning chuck and its periphery.

FIG. 15 is a perspective view of relevant parts showing an operating state of a positioning chuck.

FIG. 16 is an enlarged front elevational view showing essential parts showing the positional relationship between the drum, discharge roller, lifter, and the like in the lid temporary defective attachment discharge station.

FIG. 17 is a view showing a label-like temporary lid used in a conventional method for temporarily closing a container mouth portion, which is the background of the present invention,
(A) is a rear view thereof, and (B) is a line XVI of (A).
It is sectional drawing in I (B) -XVII (B).

18 is a front view showing a state in which the label-like temporary lid of FIG. 17 is temporarily attached to a release paper.

[Explanation of symbols]

10, 10A, 10B Lid body 12 Base material 14 Pressure-sensitive adhesive layer 16 Adhesive weakening layer 20 Lid automatic temporary attachment device 22 Pre-positioning station 24 Lid temporary attachment station 26 Lid temporary attachment defective product discharge station 28 Housing 30 Frame 32 Conveying means 32a Chain conveyors 34, 36, 38 Supporting rollers 40 Roller driving parts 42, 106, 120 Lifters 48, 110, 122 Stopper rods 50, 112, 124 Cylinder 52 Rotation assisting member 52a Pressing rollers 54, 56, 114, 128, 130, 132 Photoelectric sensor 60 Guide chuck part 64a, 64b, 66a, 66b Positioning chuck 68, 70 Positioning chuck opening / closing cylinder 80 Positioning chuck lifting cylinder 94A, 94B Labeling machine 96A, 96B Lid temporary attachment device 98A 98B Temporary lid cylinder 100A, 100B Adsorption holding plate 116 Ejection roller 126 Roller conveyor W Drum can A Drum can large mouth a Drum can large mouth opening B Drum can small mouth b Drum can Smaller opening

Front page continuation (72) Inventor Yasuhiro Yamaguchi 1-25 Kobashicho, Tennoji-ku, Osaka City Osaka Printing Printing Co., Ltd. (56) Reference JP-A-63-218091 (JP, A) JP-A-9 -156663 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65D 53/00 B67B 5/00

Claims (5)

(57) [Claims] 1. A label-like lid body that is easily peeled off is provided around the mouth portion of the container in order to automatically cover the mouth portion of the container in a series of working steps in which a large number of containers are continuously handled. A method for closing the mouth of a container, which is temporarily attached to an edge and temporarily closes the mouth of the container, wherein the lid is formed on a base material and an entire region of one main surface of the base material. Pressure-sensitive adhesive layer and surface of the pressure-sensitive adhesive layer
And a pressure-sensitive adhesive layer for weakening the pressure-sensitive adhesive layer. Wherein said lid comprises a substrate, one adhesive layer formed by coating a pressure sensitive adhesive to the entire area of the main surface of the substrate, and the formed on one region of the surface of the adhesive layer An adhesive strength weakening layer that weakens the adhesive strength of the adhesive layer, the adhesive strength weakening layer reaching the outer peripheral edge of the base material, and approximately one third of one main surface of the base material. 2. The method for closing a mouth of a container according to claim 1, wherein the method is performed by closing the mouth of the container. 3. The container according to claim 1, wherein the adhesion weakening layer is formed in a dot-like manner in a region of the surface of the adhesive layer. Mouth block method. 4. The adhesive weakening layer is formed by forming a synthetic resin on a region of the surface of the adhesive layer, and the adhesive weakening layer is formed by forming a synthetic resin on the adhesive layer. Method for closing the mouth of a container. 5. The adhesion weakening layer is formed by printing and applying a printing ink on a region of the surface of the adhesive layer. A method for closing the mouth of a container as described.