JPH0723152B2 - Packaging bag sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention loads a product into a bag provided with a foldable sealing piece for sealing an opening and an adhesive means, and then sequentially applies the bag body. While being conveyed at intervals, the release sheet of the adhesive means is peeled off to expose the adhesive layer, and the sealing piece is bent upright from the bag body, and then the sealing piece is polymerized on the adhesive layer. The present invention relates to a device for automating the sealing work when folding and adhering.

[Conventional technology]

2. Description of the Related Art Conventionally, after loading a bag with a product, the opening of the bag is fused and welded to seal the bag.

By the way, in order to make it convenient for the purchaser of the product to open the bag, one side of the opening of the bag to be fusion-welded is conventionally constituted by a sealing piece, and the sealing piece is formed by a double-sided adhesive tape. It is peelably attached to the surface of the bag. This is because the purchaser of the product can open the bag by peeling off the sealing piece from the surface of the bag.

However, the bag based on the above configuration is expensive. That is, when making a bag, two kinds of films, that is, a synthetic resin film that constitutes the body of the bag and a synthetic resin film that constitutes the sealing piece are required. Form one side of the bag that constitutes the height and the other side of the bag that is shorter than this, and superimpose the latter strip-shaped film on the other side of the bag so that they overlap at a predetermined position. This is because the work of fusing and welding is required at intervals.

[Problems to be Solved by the Invention]

On the other hand, conventionally, an adhesive means comprising a flexible sealing piece for sealing an opening, an adhesive layer for adhering the folded sealing piece, and a release sheet covering the adhesive layer. A bag body is known which is provided near the opening edge. This bag body can be easily made by, for example, half-folding and folding one strip-shaped film provided with an adhesive means in advance at the bag bottom, and fusing and welding the film corresponding to the width of the bag body. ， Lower cost than the above bag.

However, in this bag, the work of loading the product and sealing the opening of the bag is all performed manually, and it is considered that it cannot be automated.

For this reason, there is a demand for automating the loading of products into the inexpensive bag and the sealing of the bag, which is a problem.

[Means for Solving the Problems]

The present invention provides a method and apparatus for sealing a packaging bag that solves the above problems.

Thus, the present invention is configured as a means, that is, a foldable sealing piece (4) for sealing the opening, an adhesive layer (8) for adhering the bent sealing piece, and the adhesive. A working section (22) for loading a product (31) into a bag body (1) having an adhesive means (7) composed of a release sheet (9) for covering the agent layer near the opening edge; A conveyor (14) for sequentially transporting the bags in a direction parallel to the opening edges (3) with the means facing upward; and a release sheet from the vicinity of the surface of the bags on the transport path of the bags. An air nozzle (37) facing the side and peeling and releasing the release sheet (9)
And; a guide roller (45) for forming a fold at a planned bending portion of the sealing piece (4) of the bag body (1) being conveyed; and the fold and the opening edge (3) of the sealing piece (4). A pressing roller (46) for pressing the portion between the guide roller and the guide inclined edge (42a) that allows the portion from the fold to the free end of the sealing piece (4) to ride up when passing through the pressing roller (46), The guide inclined edge (42a)
An upright guide body (42) forming a passage (43) for passing the sealing piece (4) which has been erected via the upright state; and a conveyor with the sealing piece (4) standing upright. A standby part (21) for receiving the conveyed bag body (1) and making it stop and wait; a bonding actuating body (48) arranged on an extension line of the standing guide body in the waiting part, and the bonding actuating body (48) And a sealing actuating means (47) provided with an adhesion drive mechanism (49) for sliding on the adhesive layer (8) via the sealing piece (4).

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[Bag structure and product packaging method]

As shown in FIG. 11 to FIG. 14, the bag 1 used in the present invention has, for example, a belt-shaped synthetic resin film half-fold polymerized at the bag bottom 2 and one of the front and back films is opened at the edge 3 of the opening. The sealing piece 4 is further extended and the half-fold polymerized film is fused and welded at intervals in the longitudinal direction of the strip to form the bag body 1 having both side edges 5 and 6 welded. The band-shaped synthetic resin film is provided with an adhesive means 7 on the surface of the film portion located on the side opposite to the sealing piece 4 in advance, and the adhesive means 7 includes an adhesive layer 8 composed of a double-sided adhesive tape or the like and the adhesive layer 8. It comprises a release sheet 9 covering the agent layer 8. The sealing piece 4 is provided with a further extended holding piece 10, and a hole is formed in the holding piece 10 through which a holding rod 11 described later can be inserted.
The holding piece 10 and the sealing piece 4 are separated from each other by a separating line 12 such as a perforation line or a groove line.
It is configured to be easily separable via. Therefore, the bag 1 as described above is easy to manufacture and inexpensive.

When the bag 1 is loaded with products, as shown in the eleventh drawing, the holding edge 10 is inserted into the rod 11 to stack and stack a large number of bags 1, and the opening edge of the uppermost bag 1 is opened. 3 is opened, and the product is loaded into the bag body 1 manually or by an automatic device. After the product is loaded, the bag 1 is pulled toward the bottom 2 and the separation line 12 is separated while the holding piece 10 is held by the holding rod 11, and the bag 1 is provided with the separated sealing piece 4. Are transferred to a conveyor described below.

When the bag 1 is conveyed by the conveyor, the release sheet 9 is peeled from the adhesive layer 8 as shown in FIG. This peeling work can be easily performed by an air nozzle as described later.

Subsequently, the bag 1 being conveyed is made to stand up the sealing piece 4 as shown in FIG. This standing operation can be easily performed by transporting the bag body along the standing guide body as described later. In the illustrated example, the release sheet 9
After the peeling step (Fig. 12), the standing step (Fig. 13) of the sealing piece 4 is shown, but the order of both steps may be reversed.

Thereafter, as shown in the fourteenth illustration, the sealing piece 4 is folded back from the upright state in a folded shape, and the sealing piece 4 is adhered to the adhesive layer 8. This work can be easily performed by a sealing operation means as described later.

[Composition of product packaging equipment]

(Conveying Mechanism) Although not shown in FIG. 1, a conveyor is installed below the conveying table 13. The conveyor has an endless body wound around a drive wheel that is driven and rotated and a driven wheel that is idled, and drive pieces 14 are provided at intervals in the circumferential direction of the endless body. The driving piece 14 is a transport table.
It is made to project upward from the transport window hole 15 of 13 and runs on the transport table 13.

An L-shaped receiving wall 16 which is installed across the transportation window hole 15 in a plan view is erected on the transportation start end side of the transportation table 13, and the receiving wall 16 is a bag slid down from a working unit described later. A receiving wall portion 16a for receiving the bottom portion of the body 1 and a guide wall portion 16b parallel to the side edge of the bag body 1 are provided.

As shown in FIG. 2, a support plate 17 is fixed on the transfer table 13 in the vicinity of the receiving wall portion 16a, and the front end of the support plate 17 faces the transfer window hole 15. Therefore, the drive piece 14 has a notch 14a so as to pass through the support plate 17. A guide plate 18 is provided on the transfer table 13 so as to face the support plate 17 with a transfer window hole 15 in between, and the guide plate 18 is inclined upward toward a working unit described later.

As shown in the first illustration, the transfer table 13 has the receiving wall 16
A transport guide 19 extending from a toward the transport end direction is provided, and the transport guide 19 is supported by a support body 20 so that the transport guide hole 19 can be adjusted to move back and forth.

A standby portion 21 is provided at the transport end portion (the end portion of the transport window hole 15) of the transport table 13 by further extending the table.

(Working Unit) As shown in FIGS. 1 and 2, a working unit 22 for loading the waiting bag 1 with a product is arranged on the side of the carrying start end of the carrying table 13. . This working unit 22
It has a product placing table 23 installed horizontally or at a slight inclination, and a bag placing table 24 that is steeply inclined from the product placing table 23 toward the transport table 13. Product placement table
The guide arm 2 is provided with a guide tongue piece 25 extending toward the bag body mounting table 24 and expandable and contractable on both sides of the guide tongue piece 25.
6, 26 are provided, and the tip 26a of the guide arm is connected to the guide tongue piece 25.
It extends beyond. The guide arms 26, 26 are rotatable in a direction of expansion / contraction by a pivot 27, and are normally urged by a spring 28 in a direction in which the guide arms 26, 26 come close to each other, and are in contact with side edges of the guide tongue piece 25. . Further, as shown in FIG. 2, an air passage 29 that opens at the tip of the guide tongue piece 25 is formed in the lower portion of the product placing table 23, and the air from the blower 30 is pumped into the air passage 29. To be done. Further, as shown in FIG. 1 and FIG.
The holding rod 11 for the bag 1 described above is erected on the bag placing table 24 near the bag holder 1. By inserting the holding piece 10 of the bag 1 into the holding rod 11, a large number of bags 1 can be obtained. Are stacked and held on the bag placing table 24. Since the air blown from the guide tongue piece 25 through the air flow path 29 causes the uppermost bag body 1 to open the opening edge 3,
By sliding the product from the product placing table 23 through the guide tongue piece 25, the product is easily loaded into the bag body 1.

The loading operation of the product is shown in FIGS. 3 to 5. That is, in the state where the bag 1 is opened by air on the bag placing table 24 as described above, the product shown in FIG.
31 from the product placing table 23 to the pair of guide arms 26, 26
When pushed in between, both guide arms 26, 2
6 spreads out against spring 28, and guides product 31 tongue 2
The product 31 is loaded on the center of 5 while being guided, and the product 31 is loaded into the bag 1. After loading the products, if the bag 1 is pulled toward the carrying table 13 as described above,
As shown in the fifth illustration, the separation line 12 is separated, and the bag body 1 is slid from the bag body mounting table 24 toward the transport table 13.

(Conveyance Attitude Control Mechanism) The bag 1 slid down from the working section 22 strikes against the receiving wall 16 and stops, as shown in the first illustration, and the support plate 17 and the guide plate 18
It will be placed across.

When the driving piece 14 of the conveyor hits the side edge of the bag body 1 and starts carrying the bag body 1, the bag body 1 is moved to the transporting posture control mechanism 32.
Be passed through. As shown in FIG. 6, the mechanism 32 includes a support rod 33 fixedly supported by the receiving wall 16 and a pair of brackets 34, 34 suspended from the support rod 33.
The pair of elastic members 35, 35 are provided on both sides of the transfer window hole 15, and the tips of the elastic members 35, 35 are provided on the transfer table. 1
It is in contact with or close to the surface of 3.

Therefore, the bag body 1 to be conveyed has the pair of elastic members 35, 35.
Is conveyed on the conveyance table 13 through the elastic deformation of 1., the posture is controlled when passing between the elastic material 35 and the conveyance table 13, and the bottom portion of the bag 1 is guided along the conveyance guide 19.

(Release Sheet Release Mechanism) The bag 1 that is continuously conveyed is passed through the release sheet release mechanism 36 as shown in the first drawing. This peeling mechanism
As shown in FIG. 1 and FIG. 7, 36 is provided with an air nozzle 37 which is opened from the vicinity of the surface of the bag body 1 to the side of the release sheet 9 on the conveyance path of the bag body. 37 receives air pressure from an air pump (not shown).

A detection means 38 is provided which operates the air pump when the release sheet 9 of the bag body 1 being conveyed approaches the air nozzle 37. This detecting means 38, as shown in FIG.
A light emitting element 38a disposed above the sealing piece 4 at the air pump operation start position, a light receiving element (not shown) disposed below the transport table 13 facing the light emitting element 38a,
Holes 38 in the carrier table 13 that form the optical path of the light emitting element.
When the sealing piece 4 of the bag body 1 which has been conveyed and closes the hole 38b, the air pump which outputs a signal is operated.

Therefore, air is continuously ejected from the air nozzle 37 until the sealing piece 4 of the bag body 1 being conveyed closes the hole 38b and then passes through to open the hole 38b. As shown in FIG. The release sheet 9 of the adhesion means 7 on the body 1 is peeled off and blown off.

The light emitting element 38a is attached to a guide box 39, and the guide box 39 has an opening on the front side facing the air nozzle 37 and is blown off.
When receiving the guide box 39 and the transport table 13,
The release sheet 9 is discharged from the discharge path 40 formed between the release sheet 9 and the sheet. Although not shown in the drawings, the guide box 39 is preferably formed of a plate material having a large number of holes such as punching metal and has air permeability.

(Standing Mechanism of Sealing Piece) Further, the bag body 1 conveyed is sent to the standing mechanism 41 of the sealing piece to hold the sealing piece 4 upright. This standing mechanism 41
As shown in FIG. 1, FIG. 8 and FIG. 9, is a guide slanted edge 42 for letting the sealing piece 4 of the bag body 1 being conveyed run up.
An upright guide body 42 provided with a and an auxiliary guide 44 for forming a passage 43 for passing the sealing piece 4 upright between the upright guide body 42 are provided. A guide roller 45 is arranged upstream of the guide inclined edge 42a in the conveying direction, and a pressing roller 46 is arranged near the guide inclined edge 42a. Double rollers 45,46
Are rotatably supported and are in contact with the carrier table 13.

The bag 1 to be conveyed is passed through the sealing piece 4 between the guide roller 45 and the conveying table 13, and the folding piece 45a (edge of the large diameter portion) of the guide roller 45 bends the sealing piece 4. A fold is formed in the planned part. Continue pressing the sealing piece 4 and the roller
When passing through the space between the transport table 13 and the transport table 13 of 46, press the roller from the fold of the sealing piece 4 to the opening edge 3.
The free end portion of the sealing piece 4 is gradually raised by the guide slanted edge 42a in this state, and passes through the passage 43 while being held by the standing guide body 42 after standing.

(Sealing Actuating Means) The bag body 1 having the sealing piece 4 erected is held in the standing state by the standing guide body 42 during transportation,
It is sent to the standby unit 21. In the standby portion 21, the bag body 1 is released from the conveyor driving piece 14 and stopped, and while the bag body 1 is on standby, the sealing piece 4 is folded back in a folded shape by the sealing actuating means 47 to adhere it to the adhesive layer 8. To be

As shown in FIG. 1 and FIG. 10, the sealing actuating means 47 is composed of an adhesive actuating body 48 arranged on an extension line of the standing guide body 42, and an adhesive agent by pressing the adhesive actuating body 48 against the sealing piece 4. An adhesion drive mechanism 49 such as an air cylinder that slides on the layer 8 is configured. The adhesion actuating body 48 has a buffer plate 50 formed on the lower surface of the bag body 1 by a band-shaped sponge or the like extending over the entire width thereof.
And the lower surface of the buffer plate 50 is the adhesive layer 8 of the bag body 1.
It is positioned by a spacer 51 so as to move back and forth along the direction. That is, the spacer 51 is formed to have the same thickness as the thickness of the product 31 loaded in the bag body 1 or slightly thicker, and the bonding operation is performed with the buffer plate 50 along the spacer 51. Positioning body 48.

Therefore, the bag body 1 sent to the standby portion 21 in a state where the closing piece 4 is held upright by the upright guide body 42 is stopped by the adhesion actuating body 48 holding the closing piece 4 in the upright state. When the succeeding bag body 1 is detected by the detecting means 38 for operating the above-mentioned air nozzle 37, the detecting means 38 is detected.
The adhesion drive mechanism 49 is operated by a signal from the contact drive unit 49 to advance the adhesion actuation body 48. As a result, the sealing piece 4 is folded back and polymerized and adhered onto the adhesive layer 8. When the signal from the detection means 38 is stopped, the adhesion drive mechanism 49 retracts, causing the adhesion actuator 48 to retract and return to its original position.

The bag body 1 that has been sealed is held in the standby portion 21 while standing still, and is pushed out of the standby portion 21 when the succeeding bag body 1 is fed into the standby portion 21.

(Other Embodiments) In the present invention, when the sealing piece 4 is bent, the opening edge 3 is also bent together with the sealing piece 4 as shown in FIG. It is also possible to tightly wrap the product 31 so that it does not move freely within 1.

〔The invention's effect〕

According to the present invention, the bag body 1 itself can be constructed at low cost as compared with the conventional bag body having a complicated structure, and after the bag body 1 is loaded with the product, the bag body 1 is separated from the bonding means 7. After the mold sheet 9 is peeled off and the sealing piece 4 is bent and erected, the sealing piece 4
There is an effect that the sealing work of folding back and polymerizing on the adhesive layer 8 and adhering can be automatically performed.

In particular, according to the present invention, after the release sheet 9 is peeled off by the air nozzle 37, the guide roller 45 forms a fold in the planned bending portion of the sealing piece 4, and then the fold and the opening of the sealing piece 4 are formed. While pressing the edge 3 with the pressing roller 46, the free end of the sealing piece 4 is gradually raised by the guide inclined edge 42a of the rising guide body 42, and the standing sealing piece 4 is raised.
It is possible to stand upright through a passage 43 constituted by 42. Therefore, the sealing piece 4 made of a thin film and having a low shape-retaining property does not have wrinkles or be bent and deviated with respect to the planned bending line, and can be placed in an orderly posture as desired. There is an effect that it is bent upright, and subsequently, it is properly polymerized and suitably adhered to the adhesive layer 8 at the opening edge of the bag body by the sealing actuating means 47.

[Brief description of drawings]

FIG. 1 is a plan view showing an apparatus according to one embodiment of the present invention, FIG. 2 is a vertical sectional side view showing a working unit and a carrying table, and FIG.
Fig. 4 is a plan view showing the working unit before loading products, Fig. 4 is a plan view showing the working unit under loading products,
FIG. 5 is a plan view showing the working unit in a state after the products are loaded, and FIG. 6 is a vertical sectional side view showing a conveyance posture control mechanism.
Figure is a vertical sectional view showing the peeling mechanism of the release sheet, Fig. 8 is a front view showing the standing mechanism of the sealing piece, Fig. 9 is a vertical sectional side view of the same.
FIG. 10 is a vertical sectional side view showing the sealing operation means, FIG. 11 is a perspective view showing a bag body used in the present invention, and FIG. 12 is a state in which a product is loaded in the bag body and a release sheet is peeled off. Shown in perspective view, No.
Fig. 13 is a perspective view showing a state in which the sealing piece is held upright, Fig. 14 is a perspective view showing a state in which the sealing piece is polymer-bonded to the adhesive layer, and Fig. 15 is the opening edge bent together with the sealing piece. It is a longitudinal cross-sectional view of a bag body showing another embodiment. 1 …… Bag, 3 …… Opening edge, 4 …… Seal piece, 7 …… Adhesive means, 8
…… Adhesive layer, 9 …… Release sheet, 13 …… Conveyor table, 15
…… Transport window hole, 19 …… Transport guide, 21 …… Standby unit, 22 ……
Working part, 31 …… Product, 32 …… Conveyance posture control mechanism, 36 …… Release sheet peeling mechanism, 37 …… Air nozzle, 38 …… Detection means, 41 …… Standing mechanism, 42 …… Standing guide body , 42a …… Inclined edge of guide, 47 …… Seal actuation means, 48 …… Adhesive actuator, 49 ……
Adhesive drive mechanism.

Claims (1)

[Claims] 1. A foldable sealing piece (4) for sealing an opening, an adhesive layer (8) for adhering the folded sealing piece, and a release sheet (which covers the adhesive layer). A working part (22) for loading a product (31) into a bag body (1) provided with an adhesion means (7) consisting of 9) in the vicinity of an opening edge; and a bag body with the adhesion means facing upward. A conveyor (1) that sequentially conveys the opening edges (3) in a parallel direction.
4) and; an air nozzle (37) that separates and blows off the release sheet (9) by facing the side of the release sheet from the vicinity of the surface of the bag on the conveyance path of the bag; ) A guide roller (4) that forms a fold at the planned bending portion of the sealing piece (4)
5) and; a pressing roller (46) for pressing a portion of the sealing piece (4) between the fold and the opening edge (3); and a sealing piece (4) when passing through the pressing roller (46) Guide sloping edge (42a) that rides up from the fold to the free end
And a passageway (43) for passing the sealing piece (4) which is erected via the guide slanted edge (42a) while standing upright.
An upright guide body (42) that constitutes a; and the sealing piece (4)
A standby portion (21) for receiving the bag body (1) conveyed by the conveyor while standing upright and holding it in a standby state; and a bonding actuating body (48) arranged on the extension line of the standing guide body in the standby portion. And a sealing actuation means (47) provided with an adhesion drive mechanism (49) for sliding the adhesion actuating body (48) onto the adhesive layer (8) through the sealing piece (4). A device for sealing a packaging bag.