JPH0617123B2 - Container mouth seal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a container mouth sealing device that seals a canopy material made of a heat-shrinkable film by holding the canopy material in the mouth of the container. .

[Conventional technology]

As a method of sealing the mouth of the container, as shown in FIGS. 8 and 9, the canopy material (21) is cut out from the heat-shrinkable film (20), and this is addressed to the mouth of the container (30). Then, it is subjected to heat treatment,
A method of making the mouth part cling by a heat shrinkage force is widely used.

A conventional device for sealing the container mouth portion will be described with reference to FIG. 10. (100) is a sealing device, (120) is a container transfer conveyor arranged below the sealing device (100), and (20) ) Is a long belt-shaped heat-shrinkable film (raw film). The sealing device (100) has a pressing plate (101) and a cutter holder (103) that also functions as a hot air feeding unit, and the pressing plate (101) and the cutter holder (103) are individually movable up and down. ing. In addition, the original film (20) is delivered from the reel (111) in synchronization with the container transfer speed of the conveyor (120), and is a blank of a predetermined shape as a canopy material under the sealing device (100).
(21) moves while being cut off, and the surplus material (the original film with holes after the blank is cut off) is wound up on the surplus material winding reel (112).

In the above device, when the container (30) continuously transferred by the conveyer (120) reaches a predetermined position directly below the sealing device (100), the pressing plate (101) descends and the original film (20). Is pressed against the top of the container mouth, and the cutter (1
The blank (21) is cut out from the original film (20) by 02). The cut blank (21) has a peripheral edge (21.
2) is bent downward at the descending part of the holder (103), and then the hot air blown out from the holder (103) causes the peripheral part of the folded blank to undergo heat shrinkage, and the heat shrinking force causes the container mouth to open. Hug in the club. After the blank (21) is attached to the container mouth, the pressing plate (101) and the holder (103) are withdrawn upward, and the same operation as above is repeated for the container (30) to be fed next.

[Problems to be solved]

In the above-mentioned apparatus, the blank cutting from the raw film and the bending and heat-shrinking processing of the peripheral edge of the blank are performed at the same location, so that the structure is extremely complicated. That is, the pressure plate (10
1) and a holder (103) are required to move up and down, and in order to blow out hot air from the holder (103) to shrink the periphery of the blank (21), for example, inside the holder (103). A device must be installed that either sends in hot air or heats cold air in the jacket. Further, since a plurality of steps are repeated at the same place, the cycle time required for processing per container is long, and there is a great limitation in improving processing efficiency.

The present invention seeks to provide an improved container mouth portion sealing device for solving the above problems.

[Means for solving problems]

The container mouth sealing device of the present invention is a strip-shaped heat-shrinkable film, in which blanks to be a container canopy are repeatedly formed at predetermined intervals in the longitudinal direction along cut lines, and a blank except the blank. A blank is cut from the original film while continuously moving the original film in which a dividing line that divides the part into left and right is formed in the longitudinal direction, and this is sequentially applied to the container mouth, and then heat shrinks. It is a container mouth sealing device that is clung to the container mouth by processing. It rotates in synchronization with the transfer of the original film and the blank cut from the original film is adsorbed and held on the body surface by vacuum suction force. A vacuum suction rotary drum, a raw film feed roller having a circumferential groove on the barrel and arranged so that the barrel surface comes into contact with the barrel suction surface of the vacuum suction rotary drum; From the side to be inserted into the circumferential groove of the body portion, and substantially coincides with a dividing line provided in the longitudinal direction of the original film which is fed between the contact surfaces of the feed roller and the vacuum suction rotary drum. And a blank support member that abuts against the blank portion, and the vacuum suction rotation is performed so that the dividing line in the longitudinal direction that divides the raw material film into left and right parts substantially coincides with the blank support member. By feeding the drum and the original film feed roller between the contact surfaces, and by diverting the transition direction after passing between the contact surfaces to the feed roller side,
A blank cutting device for cutting a blank between the surface of the body of the vacuum suction rotary drum and the blank support member so that the blank is sucked and held on the surface of the body of the vacuum suction rotary drum, and a container to be sealed. Is transferred so that its mouth portion is substantially in contact with the lower end peripheral surface of the vacuum suction rotary drum, and a container whose blank portion is directly under the vacuum suction rotary drum is transferred to the blank heat treatment device section. And a container transfer device that holds the blank sucked and held on the surface of the body of the vacuum suction rotary drum and moved downward due to the rotation of the drum, to the mouth of the container on the container transfer device that is standing by therebelow. In order to achieve this, a blank transfer device that separates the drum from the body surface and transfers it to the container mouth, and the peripheral edge of the blank addressed to the container mouth is heat-shrinked to the container mouth. For causing the wear, the blank heat treatment apparatus which is disposed along the container transfer device, consisting of capital.

〔Example〕

The device of the present invention will be described with reference to the accompanying drawings. In FIG. 1, (40) is a blank cutting device, (50) is a container transfer device, and (60) is a blank for applying the blank to the container mouth. The transfer device (70) is a blank heat treatment device. Further, as shown in FIG. 3, the long strip-shaped heat-shrinkable film used as the original film (20) in the device of the present invention has the blangs (21) as the canopy material at predetermined intervals in the longitudinal direction. It is repeatedly formed with a cut line (22). In order to prevent the blank (21) from falling out of the raw film (20) during the feeding of the raw film (20), the cutoff line (22) is discontinuous at a plurality of places, and the blank (21) and the extra material part.
It remains connected to (23). In addition, the original film (2
In (0), a lengthwise dividing line (24) is engraved in a surplus material between adjacent blanks (21). The original film (20)
When the blank (21) is cut off, the blank cutoff line (2
It is cut along 2) and the dividing line (24), and the surplus material (23) is recovered in a state of being divided into left and right.

The blank cutting device (40) in the device of the present invention mainly includes the vacuum suction rotary drum (41), the original film feed roller (46), and the blank support member (48). FIG. 2 is a perspective view of the blank cutting device (40).

Vacuum suction rotary drum (hereinafter also referred to as "suction drum")
(41), the vacuum suction hole (42) group is open on the body surface,
It is connected to a vacuum suction system (not shown) and has a vacuum suction force for sucking the blank (21) on the body surface. The suction drum (41) is cut from the raw film (20) by rotating in synchronism with the transfer of the raw film (20) by a rotary drive mechanism (not shown) under vacuum suction operation. The blank (21) is suction-held and transferred to the standby position of the container (30).

A raw film feed roller (hereinafter, also referred to as “film feed roller”) (46) faces the suction drum (41) and substantially abuts the body surface thereof, and a rotary drive device (not shown).
At a predetermined film transfer speed. The film feeding roller (46) has a circumferential groove (47) into which a blank support member (48) is inserted in its body.

The blank support member (48) has its base portion (49) fixed at an appropriate position on the film feed roller (46) side and inserted into the circumferential groove (47) of the film feed roller (46), A blank of the original film (20) which is interposed between the contact surfaces of the suction drum (41) and the film feed roller (46) and which passes between the contact surfaces without hindering the transfer of the original film (20). (21) Abut the part. The portion of the blank support member (48) that is inserted into the circumferential groove (47) has a simple shape such as a rod shape or a band shape.

The container transfer device (50) transfers the container to be sealed at a predetermined speed and sends it directly below the suction drum (41) so that the mouth of the container (30) substantially contacts the lower end surface of the suction drum (41). While waiting at the contact position, the container with the blank (21) on the mouth is sent out from just below the suction drum (41), and the heat treatment unit
Send to (70). The transfer device (50) is preferably a screw conveyor in that the transfer pitch and transfer state of the container are kept stable.

The blank transfer device (60) is located at the lower end of the suction drum (41), and the blank (21) sucked and held on the surface of the body of the suction drum (41) is removed from the body surface. Place it on the mouth of the container (30) waiting just below it. The blank transfer device (60) is tangentially contacted with the surface of the lower end of the suction drum (41) as shown in FIG.
Scraper arranged to peel off 1) from the body surface
Consists of (61). FIG. 5 shows another example of the blank transfer device. This transfer device (60) is a suction drum.
A pair of pulleys (63, 64) located in the lower rear part of (41) and arranged in parallel with the container transfer device (50) and an endless belt (65) stretched around the pulleys (65). Become. However, in this case, a circumferential groove (43) is provided in the body of the suction drum (41), and the pulley (63) is provided in the circumferential groove (43) at the lower end of the drum.
Is facing. Further, the lower belt surface of the endless belt (65) comes into contact with the top surface of the mouth of the container (30) on the container transfer device (50) while being properly pressed, and in synchronization with the transfer of the container. It is designed to run. Its endless belt
(65) is a blank to prevent the blank (21) from being turned over, displaced, or falling off until the container (30) is introduced into the next heat treatment apparatus. It also plays the role of a holding means. Further, the vacuum suction holes (42) group of the suction drum (41) in this case are provided on both sides of the circumferential groove (43) of the body part, and the raw film (20)
The blank (21) cut out from the above is strung over the circumferential groove (43) and adsorbed by the vacuum suction holes (42, 42) group on both sides.

The blank (21) cut out from the original film (20) as described above reaches the transfer device (60) and reaches the suction drum.
It is detached from the surface of (41) and is directed to the container mouth. Therefore, it is the blank transfer device from the portion in contact with the film feed roller (46) that requires the suction action of the suction drum (41). Since it reaches the (60) section, suction of the body surface until reaching the transfer device (60) section and then returning to the contact portion with the film feed roller (46) again It is economical to stop the operation. Further, if the suction operation of the transfer device (60) is stopped at the same time when it reaches the transfer device (60), the blank can be smoothly removed from the surface of the body and transferred to the container mouth. Therefore, although not shown, the suction drum (41) is synchronized with the rotational movement of the drum (41) via a cam mechanism, for example, so that the vacuum suction operation as described above is repeatedly turned on and off. Has become.

The heat treatment device (70) has a blank (2
1) is equipped with a heating source for causing heat contraction at its peripheral portion in a state of being pressed against the mouth part, and while passing through the apparatus, the blank (21) is heated by its own heat contraction force into the container mouth. It is designed to be attached to the club.

The heat treatment apparatus (70) preferably heat-shrinks the peripheral portion of the blank and holds it in the container mouth portion by the heat-shrinking force.
It is composed of a heat treatment section and a second heat treatment section for flattening the top surface of the blank held in the container mouth by tension.

The first heat treatment section (70, 1) is a blank pressing device including pulleys (71, 71) arranged along the container transfer device (50) and an endless belt (72) stretched around the pulleys (71, 71), And a hot air delivery device (74) which is a heating source. The endless belt (72) has a meshed belt surface (for example, made of Teflon) as shown in FIG. The endless belt (72) is appropriately pressed against the mouth of the container (30) and runs at the same speed as the container (30). The heat treatment part (70 · 1) usually has a tunnel structure covered with a casing (75) in order to prevent hot air from escaping and improving heat contraction treatment efficiency.

The second heat treatment section (70/2) includes a heating plate (76) arranged above the container transfer device (50), and the plate surface of the heating plate (76) is
The upper surface of the blank (21) is heated by coming into contact with the upper surface of the blank (21) which is attached to the mouth of the container (30) passing directly below. As shown in FIG. 7, the second heat treatment section (70 ・ 2) stretches the endless belt (78) around the pulleys (77, 77) arranged above the container transfer device and heats the belt. Board
Alternatively, the heated belt may be brought into sliding contact with the upper surface of the blank (21) which is held in the container opening.

In addition, in FIG. 1, (12) is a blank punching blade device, and by repeating the vertical movement in synchronization with the transfer of the original film (20), the original film (20) A blank cutting line (22) and a dividing line (24) are repeatedly formed in the longitudinal direction. Of course, the shape of the blank (21) is determined according to the shape of the container mouth to be sealed, and if necessary,
For the sake of convenience of the opening operation when opening the sealed container mouth, a small protrusion piece (21.1) is formed as a knob piece. Further, in the figure, an example in which the dividing line (24) is engraved in the center of the original film (20) is shown, but it is engraved on one side to the left or right depending on the shape of the blank (21). There is also.

Further, (14) is a mark sensor such as a photoelectric tube, the mark of the blank portion of the original film (20) (the blank which is the canopy material of the container also serves as a label, the surface of which is a trademark, a pattern, etc. Mark is printed),
Based on the detection signal, transfer of the original film (20),
The container transportation by the container transfer device is synchronized with each other.

[Action]

The process of sealing the container mouth portion by the above-mentioned sealing device will be described. First, the raw film (20) delivered from the raw film winding reel (10) is as shown in FIG. 3 by the blank punching blade device (12). Blank cutting line (22) and dividing line (24) of a predetermined shape are engraved, and the blank cutting device (40) is controlled under the control of the transfer speed based on the detection signal of the mark sensor (14).
Sent to.

Raw film (20) introduced into the blank cutting device (40)
Passes between the contact surfaces of the suction drum (41) and the film feed roller (46) which rotate in synchronization with the transfer. The blank (21) portion of the original film (20) passing between the contact surfaces is inserted into the circumferential groove (47) from the film feed roller (46) side as shown in FIG. The blank support member (48) interposed between the contact surfaces is in contact. That is, in the original film (20), the blank (21) is held between the blank support member (48) and the surface of the body of the suction drum (41), and the left and right surplus material portions (23. 1) and (23 ・ 2) are separated by the dividing line (2
It is divided into left and right by a blank support member (48) that cuts along 4) and moves to the rear along the film feed roller (46). As a result, the blank (21) is cut from the raw film (20) in the process of passing between the contact surfaces and adsorbed on the body surface of the suction drum (41), and the residual material portion (23.1,
23.2) is the take-up reel (17) of the extra material film take-up part (16)
To be wound up.

The blank (21) cut out from the raw film (20) and adsorbed and held on the body surface of the suction drum (41) is
It is transferred to the lower end by the rotation of (41).

The blank (21) sucked and held on the surface of the body of the suction drum (41) and sent to the lower end is a blank transfer device (60).
The container (3
It is transferred to the mouth of 0).

The transfer device (60) has a suction drum as shown in FIG.
In the case of a scraper (61) that comes into tangential contact with the surface of (41), the scraper (61) is placed at the contact interface between the body surface of the suction drum (41) and the blank (21) adsorbed on the surface. The blank (21) is sucked into the suction drum by penetrating the leading edge.
It is stripped from the surface of (41) and transferred to the top surface of the mouth of the container (20). Further, as shown in FIG. 5, in the case of the transfer device in which the front pulley (63) is installed in the circumferential groove (43) of the suction drum (41), the blank (21) is sucked. Endless belt (65) from the surface of the suction drum as the drum (41) rotates.
Move to the belt surface of the suction drum as the belt runs.
Transfer from the surface of (41) to the mouth of the container (30) on the lower surface of the belt.

In this way, the container (30) with the blank (21) attached to the top of the mouth
Is sent to the blank heat treatment device (70) by the container transfer device (50) and subjected to heat shrinkage treatment, so that the blank (21) is attached to the mouth of the container (30) as shown in FIG. Complete the seal.

The blank heat treatment of the mouth of this container is shown in FIG.
When the heat treatment apparatus (70) consisting of the heat treatment section (70 ・ 1) and the second heat treatment section (70 ・ 2) shown in FIG.
In the heat treatment part (70 ・ 1), the blank (21) moves from the top surface to the container mouth part with the mesh belt (72) in a state of being pressed properly while receiving the hot air while the peripheral part (21 ・ 2). Heat-shrinks, bends downward, and tightens so as to hold the container mouth. In this case, if a flat belt without mesh is used instead of the mesh belt,
The heat shrinkage of (21 ・ 2) tends to be uneven, but by using a mesh belt, the heat shrinkage is sufficiently generated all over the circumference to hold the blank (21) evenly and firmly. You can

Although the seal of the container mouth is substantially completed in the first heat treatment section, a blank (21) attached to the container mouth in some cases.
There may be some unevenness remaining on the top surface of. The unevenness on the blank top surface is completely erased by the heat treatment in the second heat treatment section (70 · 2). In this second heat treatment section,
It is preferable that the heating plate (76) facing the top surface of the blank (21) is moved relative to the top surface of the blank, that is, brought into sliding contact. In the case of the heating plate (76) that hangs from above the container (30) such as the second heat treatment section shown in FIG. 1, it may be stopped at that position, or it may be moved horizontally in the front-back direction according to the container transfer method. It may be rocked. As shown in FIG. 7, when the endless belt (78) faces the blank (21) as a heating surface, it is run in the direction opposite to the container transfer direction, or
Alternatively, the belt surface may be brought into sliding contact with the blank by traveling in the container transfer direction at a different speed.

〔The invention's effect〕

According to the invention, the cutting of a blank from a raw film,
The steps of transferring the blank to the container and embracing the blank in the container mouth can be continuously performed to efficiently seal the container mouth.

In addition, as a measure to prevent breakage of the blank when cutting the blank from the conventional raw film, it is necessary to use a thick film that is thicker than the thickness required for the canopy material and to take a relatively large area for the extra material. Generally, in the present invention, when the blank is cut from the original film, the film is not stressed excessively, and the cutting is performed smoothly, so that a thin film can be used, and the residual material part (Scrap) can be reduced and material cost can be reduced.

Further, according to the present invention, it is possible to finish the blank (canopy) in a sealing manner with a good appearance and appearance without wrinkles or irregularities.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing the device of the present invention, FIG. 2 is a perspective view showing a blank cutting device part of the device of the present invention, and FIG. 3 is a perspective view showing an example of a raw film used in the present invention. , 4th
FIG. 5 is a side view showing an example of the blank transfer device section of the device of the present invention, FIG. 5 [I] is a front view showing another example of the blank transfer device section, [II] is a side view, and FIG. FIG. 7 is a perspective view of a main part showing the first heat treatment part in the heat treatment device part of the device of the present invention, FIG. 7 is a side view of the main part showing the second heat treatment part in the heat treatment device part, and FIG. FIG. 9 is a perspective view showing a blank and a container, FIG. 9 is a perspective view showing a seal container in which a blank is attached to a container mouth portion, and FIG. 10 is a side view outline part showing a conventional container mouth portion sealing device. 20: Raw film, 21: Blank, 22: Blank cutting line, 23 (23 ・ 1,23 ・ 2): Extra material, 24: Dividing line, 30: Container, 40: Blank cutting device, 41: Vacuum suction rotation Drums, 42:
Vacuum suction hole, 43: circumferential groove, 46: raw film feed roller, 47: circumferential groove, 48: blank support member, 50: container transfer device, 60: blank transfer device, 61: scraper, 63, 64 :
Pulley, 65: Belt, 70: Heat treatment device, 70: 1: First heat treatment unit, 70/2: Second heat treatment unit, 71: Pulley, 72: Belt, 74: Hot air delivery device,
76, 79: Heating plate, 77: Pulley, 78: Belt.

Claims (2)

[Claims] 1. A blank, which is a canopy of a container, is repeatedly formed on a long strip of heat-shrinkable film at predetermined intervals in a longitudinal direction along a cut line, and a surplus material portion excluding the blank is divided into left and right parts. While continuously moving the raw film in which the dividing line is formed in the longitudinal direction, cut blanks from the raw film and sequentially apply it to the container mouth, and then heat shrink treatment to the container mouth. A vacuum suction rotating drum that seals a container mouth to be clasped to a container and that rotates in synchronization with the transfer of the original film and that holds the blank cut from the original film by vacuum suction on the body surface. And a raw film feed roller having a circumferential groove in the body and arranged so that the surface of the body comes into contact with the surface of the body of the above vacuum suction rotary drum; Circumference A blank support member that is inserted into the blank support member and that abuts the blank portion substantially in line with a dividing line provided in the longitudinal direction of the original film that is fed between the contact surfaces of the feed roller and the vacuum suction rotary drum. The original film is brought into contact with the vacuum suction rotating drum and the original film feed roller so that the longitudinal dividing line that divides the residual film part into left and right parts substantially coincides with the blank support member. By passing between the abutting surfaces and diverting the transition direction after passing between the abutting surfaces to the feed roller side,
A blank cutting device for cutting the blank from the raw film between the surface of the body of the vacuum suction rotary drum and the blank support member so that the blank is sucked and held on the surface of the body of the vacuum suction rotary drum, and a container to be sealed. Is transferred so that its mouth portion is substantially in contact with the lower end peripheral surface of the vacuum suction rotary drum, and a container whose blank portion is directly under the vacuum suction rotary drum is transferred to the blank heat treatment device section. The container transfer device and the blank sucked and held on the surface of the body of the vacuum suction rotary drum and moved downward by the rotation of the drum are directed to the mouth of the container on the container transfer device that is standing by therebelow. To avoid this, a blank transfer device that separates the drum from the surface of the drum and transfers it to the container mouth, and the peripheral edge of the blank addressed to the container mouth is thermally shrunk For causing 抱着, container opening sealing device consisting of a blank heat treatment apparatus which is disposed along the container transfer device. 2. A blank heat treatment apparatus tension-flats a first heat treatment section for causing a peripheral edge portion of a blank to be heat-shrinked and to be attached to a container mouth portion by a heat shrinkage force, and a top surface portion of a blank attached to the container mouth portion. The first heat treatment unit is arranged in parallel with the hot air supply device and the container transfer device, and is in contact with the upper surface of the blank at the container mouth to move at the same speed as the container transfer speed. The second heat treatment section includes a mesh belt that runs endlessly, and the second heat treatment section includes a plate-shaped heating body that is in sliding contact with the upper surface of the blank held in the container mouth section. Container mouth sealing device.