JPH06104532B2 - Method and device for automatically attaching double suspension - Google Patents

Description

TECHNICAL FIELD The present invention relates to a novel method and apparatus for automatically attaching a double suspender to a bag body. More specifically, to make it convenient to store and carry items in synthetic resin bags, or to display items, use bags that already contain items or bags that do not yet contain items. The present invention relates to an industrial method suitable for mass production in which a double hanging device is automatically attached, and an apparatus for carrying out this method.

[Conventional technology]

2. Description of the Related Art Conventionally, there is known a bag in which a hanging tool is attached to an upper portion of a bag made of synthetic resin, which is convenient when the items are displayed and carried around in a bag.

As a method for attaching the hanging device to the bag body, usually, a synthetic resin header having a punched portion having a shape suitable for hanging or carrying is prepared in advance, and this header is polymerized on the upper end portion of the bag body. It was done by manual work such as bonding with an adhesive or heat welding.

However, such a conventional method has a problem that the manufacturing cost is inevitable because the process is complicated and it is not suitable for mass production.

Therefore, the inventor has already proposed and considered a method of automating the work of attaching the hanger by a mechanical work rather than a manual work.

That is, the automatic attachment method of this hanging tool is to place the synthetic resin bag body on the conveyor and convey it in a one-pitch intermittent transfer motion so that its sealed upper end portion is at the hanging header attachment position, then The synthetic resin header sheet is also sent intermittently in the front direction from the direction perpendicular to the flow of the conveyor so that its tip portion overlaps with the substantially center of the upper end portion of the bag body, and then the bag body At the same time as heat-sealing, the header sheet is cut and a hanging header having a desired width is provided at the upper end of the bag body, and then the header-equipped bag body is moved by the one-pitch intermittent transfer motion. The header is punched into a desired shape.

[Problems to be solved by the invention]

In the previously proposed method for automatically attaching the hanging device, the header made of one sheet is welded to one surface of the bag body. When the header consisting of this one sheet is welded to one side of the bag body, when displaying or carrying this, the bag body is displayed or carried in an unbalanced state due to the bias of the center of gravity. There is a problem that it will happen.

In order to prevent the bias of this bag body, by stacking and welding one header sheet from each side of the bag body, when supporting this header, the center of gravity of the bag body is positioned directly below the header, It is preferable that a suitable display can be obtained and that there is no bias in carrying.

However, the conventionally known method of manually attaching a hanging device is troublesome, and the automatic attachment method already proposed can only attach a biased suspending device composed of one sheet to a bag.

In view of the above points, the present invention aims at mass production of a bag body having a double suspender in which the respective sheets of the double suspender consisting of two sheets are welded to opposite surfaces of the bag body. It is an object of the present invention to provide a new method and apparatus for automatically attaching a double hanging device that enables the device.

[Means for solving problems]

For this reason, in the present invention, a bag-intermittent transfer step of transferring a synthetic resin bag by a conveyor for one bag, and two header sheets are perpendicular to each other in the plane of transfer of the bags. Intermittently transferred from one direction, the leading end portion of one header sheet is polymerized on a part of the synthetic resin bag body, and the other header sheet tip portion under a part of the synthetic resin bag body. When the intermittent feeding process of the two header sheets to be superposed and the intermittent transport process of the bag body and the intermittent transport process of the header sheet are stopped, heat the two header sheet tips into the bag body. The present invention provides an automatic attachment method for a double hanging tool, which comprises a welding step of welding and a cutting step of separating two header sheet front end portions from the respective sheets, and further, Synthetic resin bag A conveyor for intermittently transferring a single body or a continuous body by the amount of one bag, and a leading end of one header sheet from a holding portion for two roll-shaped header sheets And a transfer roller for intermittently feeding the two header sheets so that the leading end of the other header sheet is polymerized under a part of the bag body. A heat sealer positioned at a portion where the leading end portions of the two header sheets are overlapped and welded to each other, and a cutter that separates the leading end portions of the two header sheets from the respective sheets are provided. Also provided is an automatic attachment device for a double hanging device.

There is no particular limitation on the material of the synthetic resin bag used in the present invention, and those conventionally used for bags, for example, thermoplastic resin films such as polyethylene, polypropylene, polyolefin, polyvinyl chloride, polyester, polyamide and polystyrene are used. Can be used.
These films contain various additives that are usually used,
For example, antioxidants, heat stabilizers, UV absorbers, plasticizers,
An antistatic agent, an antiblocking agent, or the like may be added.

Further, as the bag body, a horizontal pillow system or a vertical pillow system,
Alternatively, the article may be stored and sealed by another method, or a side seal bag having an opening before the article is stored may be used.

The one-pitch intermittent transfer movement in the case of such a continuous bag is carried out by detecting the characters or patterns of the bag with a photoelectric tube. Further, in the case of individually separated bags, a partition plate may be provided on the conveyor to perform a one-pitch intermittent transfer motion at each interval.

On the other hand, in the method of the present invention, the material of the sheet used for the hanging header can be the above-mentioned thermoplastic resin, but from the viewpoint of heat-welding property, the same material as the bag body is preferable. . The thickness of the sheet is not particularly limited as long as it has appropriate rigidity for hanging or carrying. The width is also not particularly limited, and one having an appropriate width can be selected and used.

[Action]

In the method and apparatus of the present invention, when attaching the double hanging tool to the synthetic resin bag body, two long header sheets are intermittently fed and transferred, and the leading end of one sheet is part of the bag body. The upper sheet is polymerized, and the tip portion of the other sheet is polymerized and welded to a portion below the bag body. At the same time, the leading ends of the two sheets welded to the bag are cut and cut from the continuous header sheet. This cutting may be performed simply by separating the tip end portion (hanging tool) from the header sheet, or preferably, the corner removing operation may be performed at the same time to improve the shape of the hanging tool. it can. Further, in this state, the two hanging parts welded to the bag body are separate from each other and separated from each other. When the leading ends of the sheets are fixed to each other and integrated, the leading ends of the two sheets are fixed to each other. The part of this mutual fixation is
The three edges of the sheet may be welded, only the two edges may be welded, spot welding may be performed, or bonding and fixing may be performed by mechanical means. Further, the mutual fixing of the two sheets may be performed at the same time as or after the step of cutting the sheet front end portion.

〔Example〕

Hereinafter, the method and apparatus of the present invention will be described in detail with reference to the embodiments shown in the drawings.

In the figure, 1 is a conveyor, and a known conveyor is used. This conveyor is designed to intermittently feed the synthetic resin bag 2 by one portion. Therefore, when a continuous synthetic resin bag is transferred, one synthetic resin bag is intermittently transferred, and when a single bag is transferred, one bag is placed. Only the existing conveyor part is intermittently transferred.

Reference numerals 3 and 3'represent separate long header sheets, which are rolls 4 and 4 ', respectively, which are held by the roll holding portions 5, 5' located above and below and fed from this. Reference numerals 6 and 6 denote transfer rollers for intermittently feeding the two header sheets 3 and 3'in a stacked state.
Of the header sheet 3 ', which is fed in from a direction perpendicular to the plane of the transporting direction of the sheet, is located at the upper end (hanging tool).
18 'is polymerized on the central part of one end of the bag body 2,
Tip of header sheet 3 located at the lower level (hanging tool)
18 is made to polymerize under the center part of one end of the bag body 2.

In the figure, 13 is a heat sealer, which is provided at a position where the bag body 2 on the conveyor 1 and the tip end portions 18 and 18 'of the two header sheets 3 and 3'are overlapped with each other. It is what is welded. The heat sealer includes a heater pedestal 15 supported by a pedestal 14 and a heater head 17 movably supported by a cylinder 16 supported by the pedestal 14.
It consists of and.

The frame 14 has a cutter 1 for separating the tip end portions 18, 18 'serving as suspending tools from the two header sheets 3, 3', respectively.
9 is also provided. That is, in the figure, 20 is a cutter support supported by the mount 14, and 21 is a cylinder supported by the mount 14.
The cutter head is supported by 22 so as to be movable up and down, and the cutter head 21 and the cutter holder 20 constitute the cutter 19.

Further, the gantry 14 is provided with a separation guide 25 for separating the two header sheets 3 and 3'which are stacked and transferred by the transfer rollers 6 and 6. The separating guide 25 has a tip portion 18 'of one of the upper header sheets 3'above the bag body 2, and a tip portion 18 of the other lower header sheet 3 below the bag body 2. It is for sending to. In the illustrated embodiment, this separation guide 25
Is formed by a horizontal rod having a wedge-shaped cross-section, it may be formed by another shape, for example, a groove-shaped member that guides both edges of each sheet.

Reference numeral 26 shown in FIG. 2 denotes two suspenders 1 welded to the bag body 2.
It is a heat sealer that fixes 8,18 'by welding means. This heat sealer is positioned downstream of the position of the heat sealer 13 and the cutter 19 on the downstream side of the conveyor 1, and preferably faces the stop position next to the stop position desired by the heat sealer 13 and the cutter 19 of the conveyor for intermittent transfer. It is good to be positioned. And this heat sealer 26, a heater pedestal 28 supported by a pedestal 27,
The heater head 30 is supported by a cylinder 29 supported by a frame 27 so as to be vertically movable. With this heat sealer 26, the two sheet tips 18,1
The third example is where the three-sided position of the hanging device consisting of 8'is welded 31.
As shown in FIGS. 4 and 5, this welding may be performed in two ways or in spots. Further, it may be occluded or bonded and fixed by mechanical means instead of welding means.

Reference numeral 7 shown in FIG. 2 is a punching mechanism for punching the hanging through hole 8 overlapping the two header sheets 3 and 3 ', and during the transfer of the two header sheets 3 and 3'which are intermittently transferred. It is located at a position and comprises a punching pedestal 10 supported by a gantry 9 and a punching cutter 11, and the cutter 11 is supported by a cylinder 12 supported by the gantry 9 so as to be vertically movable.

In the illustrated embodiment, the hanging through holes 8 are formed in the header sheet.
Although punching is performed during the intermittent transfer of 3,3 ', the punching of the suspension through hole 8 is performed by the tip end portion 18,18'.
May be performed at the same time as the separating step by a cutter for separating from the sheets 3, 3 ', or at the same time during the fixing step of welding the two separating tip portions 18, 18' by the heat sealer 26. .

In addition, 23 in the figure is a guide roller for two header sheets, and 24 is a cut-off portion cut off by the cutter 19.

In the apparatus configured as described above, it is desirable that the intermittent transfer of the bag body 2 by the conveyor 1 and the intermittent transfer of the two header sheets 3, 3 ′ by the transfer rollers 6, 6 be performed in synchronization. . That is, when the conveyor 1 is operating and the bag body 2 is being transferred, the two header sheets 3 and 3'are also transferred at the same time, and the conveyor 1 is stopped and the bag body 2 is stopped, and at the same time two sheets are transferred. The header sheets 3 and 3'also stop, and their tip portions 18 and 18 'are superposed on and under a part of the bag body 2.

Then, during this stop, the punching cutter 11 of the punching mechanism 7 moves downward, and the through holes 8 for hanging are sewn in the respective sheets 3, 3 '.
To drill. At the same time, the heater head 17 of the heat sealer 13 moves downward to heat-weld the above-mentioned overlapped portion, and the upper end portion 18 ′ of the upper part of the bag body 2 is attached to the upper end part 18 ′ of the upper part of the bag body 2. Partly welded to the lower surface. At the same time, the cutter head 21 of the cutter 19 moves downward, and the two header sheets 3,
From the 3 ', separate the two tips 18, 18' that will be the suspending tool.

In this way, the bag body 2 to which the two front end portions 18 and 18 ′ serving as the suspending tools are attached is intermittently transferred to the conveyor 1 and is sent downstream by one pitch interval and stopped. In this state, as shown in FIG. 2, the two tip parts 18, 1 attached to the bag body 2 are attached.
8'is at the position of the heat sealer 26, so that the heater head 30 moves downwards of the cylinder 29, and
The appropriate positions of 18,18 'are welded.

〔The invention's effect〕

As described above, the method and apparatus of the present invention have the advantage that one of the two suspenders (headers) can be automatically attached to one surface of the bag and the other to the other surface of the bag. This has the effect of mechanizing the attachment of the double hanging device to the bag body and enabling mass production of the double hanging device bag.

[Brief description of drawings]

The drawings show an example of an apparatus for carrying out the method of the present invention,
FIG. 1 is a front view of the device excluding the fixing process part of the two hanging devices, FIG. 2 is a front view of the device of the fixing process part of the two hanging devices, and FIG. 3 is a bag body. FIG. 4 is a plan view schematically showing the work flow of the hanging device, and FIG. 4 is a diagram showing a completed product in which the hanging device is attached to the bag. 1 ... Conveyor 2 ... Synthetic resin bag 3,3 '... Header sheet 4,4' ... Roll, 5,5 '... Roll holder 13 ... Heat sealer 18,18' ... Tip (hanging tool) 19 …… Cutter, 26 …… Heat sealer

Claims (3)

[Claims] 1. A bag-intermittent transfer step for transferring a synthetic resin bag by a bag by a conveyor, and a direction in which two header sheets are perpendicular to the transfer direction of the bags. The header portion of one of the header sheets is superposed on a part of the synthetic resin bag body, and the tip portion of the other header sheet is superposed on a part of the synthetic resin bag body. The two header sheets are intermittently fed, the bag body is intermittently transferred, and the header sheet is intermittently transferred, and the two header sheet tips are heat-welded to the bag body. An automatic attachment method for a double suspension, comprising a welding step and a cutting step of separating the front end portions of the two header sheets from the respective sheets. 2. An inter-bag-body intermittent transfer step of transferring a synthetic resin bag body by one bag by a conveyor, and a direction in which two header sheets are perpendicular to the transfer direction of the bag bodies. The header portion of one of the header sheets is superposed on a part of the synthetic resin bag body, and the tip portion of the other header sheet is superposed on a part of the synthetic resin bag body. The two header sheets are intermittently fed, the bag body is intermittently transferred, and the header sheet is intermittently transferred, and the two header sheet tips are heat-welded to the bag body. The welding step and the cutting step of separating the two header sheet tip portions from the respective sheets, and the two sheet tip portions of the bags that have been intermittently transferred after the welding step and the cutting step are fixed to each other. Hanging device fixing process Automatic installation method of the double hanger, characterized in that it consists of. 3. A conveyor for intermittently transferring a single body or a continuous body of a synthetic resin bag body for one bag body, and a roll-shaped header sheet holding portion for holding one of the header sheets. A transfer roller that intermittently feeds two header sheets so that the tip portion is superposed on a part of the bag body on the conveyor and the tip portion of the other header sheet is superposed on a part of the bag body. And a heat sealer for welding the overlapped portion by positioning the overlapped portion between the bag body on the conveyor and the end portion of the two header sheets, and cutting the end portions of the two header sheets from the respective sheets. An automatic attachment device for a double hanging tool, characterized in that it is provided with a cutter for separating.