JPH01279023A - Bag sealing apparatus - Google Patents

Abstract

PURPOSE:To heat seal film edges into a buildup form to ensure sufficient sealing strength, by providing a sealing device with not only a fusion cutting knife but also a fusion sealing part, whereby, after cutting the opening edge of a bag, the cut edges are sufficiently fused in frictional contact therewith. CONSTITUTION:Since a header 67 is fixed to a restraining body 34 and since the distance L between the restraining body 34 and a rotary fusion cutting knife 56 is held constant with the restraining body 34 as a reference, the opening edge of a bag 65 is cut off at the predetermined distance L from a heat sealing seam 67b and parallel thereto. The heat cutting and sealing of this bag is performed by cutting the opening edge of the bag 65 with the peripheral edge 58 of the fusion cutting knife 56 while holding the same with an upper and lower rotating body 49 and 50 and by moving the cut edges of the bag opening along the chord of the fusion cutting knife in frictional contact with a fusion sealing part 59. This method brings about sufficient fusion of the film cut edges with exceedingly firm fusion bonding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is based on the following technology: After loading products into nine bags, the bags are conveyed by a conveyor and the opening edges of the bags are automatically fused and welded by a sealing device. related to a device for

[Conventional technology]

Conventionally, there has been one example of a bag for packaging products.

A device made of a synthetic resin film and having an opening at one end and a header at the other end is known.

After loading the product into this bag through the opening.

The edges of the opening are sealed by fusing and welding. When selling products, the header should be facing upwards.
It is displayed by hanging it through the header part.

Conventionally, all the fusing and welding of the opening edge of a bag loaded with products has been done manually. That is, after the two bags are loaded with products, the opening edge of one bag is loaded into a heat sealing device while the bag is held by the operator's hand, and the opening edge is fused and welded. Conventional heat sealing devices are of the type using nichrome wire or of the type using a heating blade that moves up and down.

[Problem to be solved by the invention]

In the case of the conventional technology, there is a problem in that the work of sealing the bag loaded with products is inefficient and productivity is low.

For this reason, there is a desire to automate at least the fusing and welding of the opening edge of the packaging work, but there are still many issues in automatically fusing and welding the bag containing the product while transporting it. There is.

In other words, it is relatively easy to imagine that if nine bags are transported by a conveyor such as a belt conveyor and the opening edges are automatically welded and welded by a sealing device, the above-mentioned demand for automation can be met. However, in reality, the five bags are loaded with products, making them bulky and oddly shaped, and moreover, they are transported with the openings left open.

If the opening edges are simply pressed down with an automatic sealing device and fused and welded, there is a risk that the bag body will be displaced or oriented when the opening is fused. Particularly, since the opening edge is forcibly fused while leaving wrinkles, etc. at the edge of the opening during fusing, this poses an important problem in that the fused weld line cannot be neatly formed.

In addition, conventional sealing devices that use nichrome wire or heated blades that move up and down can only instantly melt the opening edge of one bag, and the opening edge can be cut by melting the film at the time of fusing. Since the opening edges are simply welded together, the welded portion easily peels off when the opening edges are later separated in the separating direction, posing the problem that the welding strength is insufficient.

[Means to solve the problem]

The present invention is applied when one bag is transported by a conveyor and the opening edge is fused and welded by a sealing device.

The stable feeding device allows the opening edge to run stably while the sealing device allows for orderly fusing and welding.
Moreover, by providing the sealing device not only with a simple fusing blade but also with a fusing part that sufficiently melts the fusing edge while rubbing the aperture edge after fusing the opening edge, the fusing edge of the film is welded in a build-up shape. As a result, sufficient welding strength can be ensured.

Therefore, the second aspect of the present invention is configured as the first means.
A sealing device for fusing and welding the opening edge of a bag made of synthetic resin film during transport: comprising a fusing part and a melting part that follows the fusing part and melting the fusing edge of the opening edge while rubbing it. The second means includes a stable feeding device that clamps the opening edge of the synthetic resin film bag being conveyed by the conveyor and runs in synchronization with the conveyor; and a sealing device for fusing and welding the opening edge of the bag body while being held by the feeding device. The stable feeding device includes an upper rotating body and a lower rotating body; Subsequently to the melting part, the melting part rubs and melts the melted edge of the opening edge.

In the above device, the sealing device may be composed of a disc-shaped rotary fusing blade, having fusing portions on two peripheral edges, and forming a fusing portion on a circumferential side portion near the two peripheral edges. Also,
The upper rotating body of the stable feeding device is composed of a pair of endless belts arranged in parallel with each other, the lower rotating body is composed of a pair of endless belts arranged parallel to each other and parallel to the upper rotating body, and the sealing device The fusing part and the melting part can be arranged within the spacing between the pair of opposing endless belts of both the upper and lower rotating bodies.

[Example of device]

Embodiments of the present invention will be described in detail below based on the drawings.

(Overall Configuration) FIG. 1 shows the entire apparatus of the present invention. A frame 2 is mounted on the base l, and a belt conveyor type conveyor LZ3 is provided on the frame 2. The conveyor device 3 includes a driving pulley 4 and a driven pulley 5, which are mounted on both ends of the frame 2 in the longitudinal direction, and a conveyor belt 6 that is wound around both pulleys. The return side of the belt 6 is located below the conveyance table 7.

A working section 8 for filling two bags with products is provided on the upstream side of the conveyor device 3, and a closing device 9 for closing the opening edge of one bag is provided on the midstream side of the conveyor device 3. A sealing device 10 for fusing and welding the opening edge of one bag is provided on the downstream side of the conveyor device 3.A working section 8 is provided separately from the frame 2; The device 9 and the sealing device 10 are mounted on the frame 2, and the two devices 9 and 10 constitute a device for sealing the opening of the bag.

As shown in the second figure, the frame 2 is pivoted 11 to the base 1 on the negative side, and is connected to the base 1 on the other side via a lifting mechanism 12 such as a turnbuckle. It is held in an upwardly tilted position toward the direction, and the tilt angle can be adjusted freely.

(Composition of working section) As shown in FIGS. 1 and 2, one working section 8 is provided.

Work table 13, holding table 14, and guide device 1
5.

The work table 13 is as shown in FIG.

A horizontal special section 16 that waits for products to be loaded into bags.
and a loading section 17 that slopes gently downward from the special section 16 toward the holding table 14 to make it easier for the product to slide down toward the bag.
A guide tongue piece 18 is provided that extends upward. Preventive walls 19 are provided on both sides of the guide tongue 18 to prevent the products on the loading section 17 from sliding down onto the holding table 14. This work table 13.

The second housing is supported by a housing 20 extending from the base 1.
As shown in the figure, an air supply passage 22 from a blower 21 is formed in the housing 20, and the air supply passage 22 opens below the guide tongue piece 18.

The holding table 14, as shown in FIGS. 1 to 3,
It consists of a plate-shaped body 23 that is slightly sloped more steeply than the special machine part 16, and has a large number of holding holes 24 formed along the side edge located below the guide tongue piece 18. A holding plate 25 is disposed approximately at the center of the plate-like body 23 and extends across the width thereof, and the holding plate 25 is attached to the plate-like body 23 so that its inclination angle can be freely changed. That is, as shown in Figure 1, the holding plate 25 is held at a gentler slope than the plate-like body 23, and therefore at an angle close to the horizontal direction, and as a result, there is a step 2 between the holding plate 25 and the plate-like body 23.
5a is formed. As shown in the second diagram, the holding table 14
teeth.

It is placed on an inclined plate 26, and the inclined lower end of the inclined plate 26 is pivoted 27 to the housing 20, and is constantly biased by a spring 28 in the direction of upward rotation.

The plate-shaped body 23 is engaged with the inclined plate 26 via a slide rail 29 extending in the width direction, and the plate-shaped body 23 is slidable in the width direction along the rail. Furthermore, the plate-shaped body 23 is formed at the inclined portion below the step 25a of the holding plate 25.
A guide plate 30 facing the inclination direction is erected on the
The guide plate 30 includes an adjusting portion 31 that can be adjusted and fixed in the width direction of the plate-shaped body 23.

The guide device 15 is for guiding the bag loaded with the product on the holding table 14 onto the conveyor device 3. In the example shown in FIG. 32. Specifically, this sliding path 32 is made up of an extension 7a of the transport table 7, and a posture control plate 32 provided at the side edge of the extension 7a and extending along the lower edge of the holding table 14. That is, as shown in the second figure, the conveyor table 7 including the extension part 7a and the conveyor device 3 are held at an inclination steeper than the holding table 14 by the lifting mechanism 12, while the posture control The plate 32 is the holding table 1
The slope is maintained at a gentler slope than 4. At this time, although not shown in the drawings, it is preferable that the attitude control plate 32 is provided with means for adjusting the inclination angle.

(Configuration of bending guide device) A bending guide device 33 is provided above or near the conveyor device 3 facing the slideway 32.

In the embodiment of FIGS. 1 and 2, the bending guide device 33
consists of an abutment plate 35 provided on an extension portion 34a of a regulating body 34, which will be described later (FIG. 2).

This abutment plate 35 is connected to the extension portion 3 through the &5 member 36.
4a, and the wedge member 36 allows the slideway 3 to
The angle is set so that the lower edge of the impact plate 35 faces the lower edge of the second attitude control plate 32, and the lower edge of the impact plate 35 faces the intersection 34b of the front surface of the extension portion 34a and the conveyor belt 6. Incidentally, the abutment plate 35 is attached through a long hole 37 so as to be vertically adjustable.

(Structure of Regulating Body) The regulating body 34 is made of a plate that stands upright along the inclined lower edge of the conveyor belt 6, and is supported by the frame 2 by a support iron 38.

Preferably, the support rod 38 is adjustably fixed to a bracket 39 fixed to the frame 2, so that the regulating body 34 can be freely adjusted forward and backward in the width direction of the conveyor belt 6.

More preferably, as shown in FIG. 3, a guide plate 40 is provided close to and parallel to the regulating body 34, and a conveyance path 41 of a header portion to be described later is formed between the regulating body 34 and the guide plate 40. , the starting end of the conveyance path 41 is an expanding introduction part 42,
The introduction part 42 faces the lower part of the abutting plate 35 from the side.

(Configuration of Closing Device) The closing device 9 constituting the front stage of the sealing device has a correction rail 43 provided on the m-feeding table 7 and arranged parallel to the conveying direction of the conveyor device 3.

It consists of a rotating body 44 that runs close to the correction rail 43 and in synchronization with the conveyor device 3.

Specifically, as shown in FIGS. 5 and 6.

The correction rail 43 has both longitudinal ends 43a and 43b inclined downward, and an intermediate portion 43C formed into a flat linear shape. On the other hand, the two-rotating body 44 consists of an endless belt 47 wound between a driving pulley 45 and a driven pulley 46, and causes the feed side of the belt 47 to run parallel to and synchronously in the same direction as the conveyor device 3. Preferably, the gap between the intermediate portion 43C of the correction rail 43 and the endless belt 47 is zero or approximately equal to the wall thickness of the bag. Therefore, the correction rail 43 and the endless belt 47
Toha, the correction rails 43 are arranged so as to be out of phase with each other in the direction perpendicular to the R feeding direction, and as shown in FIG. .

(Configuration of sealing device) The sealing device 10 constitutes the latter stage of the sealing device.

It is also provided with a stable feeding device 48 that stabilizes the bag during transportation.

That is, as shown in FIG. 5 and FIG.
8 consists of an upper rotating body 49 and a lower rotating body 50.

The upper rotating body 49 has a pair of endless belts 51a and 51b which are arranged in parallel and wound around the drive pulley 45 of the sealing device 9 with the endless belt 47 interposed therebetween. Both belts 5Ia, 5
1b is wound around a driven pulley 52.

On the other hand, the lower rotating body 50 includes a pair of endless belts 53a, 53 arranged parallel to endless belts 51a, 51b that constitute the upper rotating body below the upper rotating body 49.
b, and one belt 53a, 53b is connected to a driving pulley 54.
and the driven pulley 55. Incidentally, the upper and lower rotating bodies 49 and 50 run in synchronization with each other and with the conveyor device 3, and the respective endless belts 51a,
The feed sides of 51b, 53a, and 53b are in contact with each other and run in the same direction as the conveyance direction of the conveyor device 3.

The sealing device IO is comprised of a disc-shaped rotary fusing blade 56, as shown in FIGS. 5 and 6.

It is rotated by a rotation drive shaft 57 in the clockwise direction in the drawing. The rotary fusing blade 56 has one circumferential edge as a fusing portion 58 and a circumferential side portion at least near the circumferential edge on the inner circumferential side of the fusing portion as a fusing portion 59 . In this embodiment, two illustrations are omitted.

The rotary fusing blade 56 is made to generate heat via a heating means, and the fusing part 58 and the melting part 59 are maintained at a high temperature. At this time, if the peripheral edge including the fusing part 58 and/or both side faces including the fusing part 59 of the one-rotation fusing blade 56 are coated with tetrafluoride resin (trade name: Teflon), the opening edge of the bag described later It is possible to suppress the generation of gas when fusing and welding the opening, and it is also possible to easily peel off the cut end of the opening edge. - The two-turn fusing blade 56 is disposed between the pair of pulleys 54.55 of the lower rotary body 50 mentioned above, and is connected to each of the endless belts 5 of both the upper and lower rotary bodies 49.50.
The belts 1a, 51b and 53a, 53b are inserted through the spacing in which the belts are arranged side by side on the opposing feed sides, and the melting section 59 is disposed between the upper and lower rotating bodies 49,50.

In the example of FIG. 1, as shown in FIG. 6, on the downstream side of the rotary fusing blade 56 in the conveyance direction.

A separation plate 60 is fixedly installed between the endless belts 51a and 51b and between the endless belts 53a and 53b.

(Configuration of Chip Disposal Device) As shown in FIG. 1, a chip disposal device 61 is provided further downstream in the conveyance direction from the sealing device 10 and the stable feeding device 48. This chip disposal device 61 is 11! It includes a waste passage 62 opened above the feeding table 7 and an exhaust duct 63 facing the waste passage 62, and the exhaust duct 63 is connected to a blower 64 shown in the second figure.

[Effect of the embodiment]

In order to carry out packaging based on the apparatus shown in the above embodiment, first, a large number of bags are placed on the holding table 14 of the working section 8. This bag 65 is a known one, and is made of a single synthetic resin film and has an opening 66 at one end and a header 67 at the other end, as shown in FIGS. 7 and 8. As shown in FIG. 8, this header section 67 is constructed by wrapping a reinforcing piece 67a made of relatively thick synthetic paper or the like with a film and forming a welded line 67a.
7b.

In addition, one bag body 65 has adhesive 68 on the front and back sides of the example film part.
A sealing part 68 that can be opened and closed via a is provided, and a film part on the other side is extended from the opening edge to serve as a holding piece 69,
A pair of holes 70 are formed in the holding piece 69. Furthermore, the seventh
As shown in the figure, notches 71a and 7 are formed on the periphery of the hole 70.
It is desirable to form 1b.

Then, a large number of bags 65 are stacked and placed on the holding table 14, and a gate-shaped holder 72 is placed on the bags 65 as shown in the third figure.
It is fixed and held by inserting it into the hole 70 and the holding hole 24. The holder 72 is the guide tongue piece 18 of the work table 13
Located at the bottom of. , At this time, a large number of stacked bags 6
5, the header part 67 is particularly high in the entire structure, but as shown in the fourth figure, the header part 67 is located in a depressed manner on the step 25a of the holding plate 25, so the top layer of the bag body 65 is held in a flat position.

Items to be loaded into the bag body 65, particularly small items such as a razor for shaving, are not shown in the figure.

It is stocked in the special equipment section 16 of the work table 13.

The required amount is placed on the loading section 17. When the blower 21 shown in FIG. 2 is operated, air is supplied from below the guide tongue piece 18, and as shown in FIGS.
5 opens the opening 66 wide. Therefore, if the product is slid down from the loading portion 17 of the two-work table 13 along the guide tongue 18 in this state, the product can be easily loaded into the bag body 65.

After loading the product, two workers hold the bag 65 and move it to the step 25a.
When pulled downward, the holding piece 69 of the two bags 65 is torn off from the periphery of the hole 70 and separated from the holding tool 72, and the header part 67
It slides down above the conveyor belt 6 via the slide path 32 with the top at the top. When the two bags 65 slide down, the guide plate 3
The header part 67 is guided by the attitude suppressing plate 32 and jumps toward the impact plate 35, and the header part 67 is hit by the impact plate 35 while descending due to the weight of the loaded product. 67 is bent upward using the weld line 67b as a hinge and falls.

At the point of fall, the bending fulcrum is the regulation plate extension 34a.
The header portion 67 is located at the intersection 34b of the conveyor belt 6 and the bent header portion 67 is located at the intersection 34b of the conveyor belt 6.
is maintained in an upright position along the

Since the conveyor device 3 is in a driving state, the bag body 65 is conveyed as soon as it falls, and this LB feeding header section 67 advances along the regulating body 34.

In the unlikely event that the header section 67 is not properly erected,
After the start of B transmission, the header section 67 moves to the introduction section 42 shown in FIG.
When the header portion 67 is introduced into the conveyance path 41 from the
b) is drawn toward the regulating body 34. Therefore, one bag 65 is 0
The posture is maintained such that both side edges are perpendicular to the regulating plate 34.

The bag body 65 is conveyed by the conveyor device 3.

The opening edge is advanced on the conveying table 7, and the closing device 9
leading to. When reaching this closing device 9, the bag body 65 with its opening in a half-open state is moved from the advancing side edge of the cough bag body 65 to the straightening rail 43 using the inclined starting end 43a of the straightening rail 43 as a guide. and the rotating body 44,
As shown in FIG. 9, it is held between the correction rail 43 and the rotating body 44, the opening edges are brought into close contact with each other, the opening is shaped into a flat shape, and the opening is closed in a horizontal character shape.

Subsequently, the opening edge of one bag 65 reaches the stable feeding device 48, and the bag is advanced while being held between the upper and lower rotating bodies 49,50 while the opening remains tightly closed as described above. Rare.

It passes through a sealing device 10. At this time, since the header portion 67 of the first bag body 65 is placed along the regulating body 34, the 10th bag body 65
As shown in the figure, the distance from the regulating body 34 to the rotary fusing blade 56 is set to a constant dimension with the regulating body 34 as a reference.

The opening edge of the bag 65 is fused at a predetermined distance ML from the weld line 67b, and the fused line is formed parallel to the weld line 67b. At the time of fusing, the opening edge of the nine-bag body 65 is held by both the upper and lower rotating bodies 49 and 50, and is then fused by the peripheral fusing portion 58 of the fusing blade 56.

Subsequently, the melting edge of the opening edge is rubbed by the melting portion 59 and progresses in the chordal direction of the melting blade 56.

The cut edges are sufficiently melted to form a lumpy molten resin bonded portion 66a as shown in Figure 11.

That is, one bag body 65 has a molten resin adhesive part 66a formed in a straight line in a welded part in a built-up shape, and at this time, as described above, the opening edge of the bag body 65 is brought into close contact with the closing device 9 in advance, and The tightly closed state is maintained by the stable feeding device 48, and in this state, the built-up molten resin adhesive portion 66a is integrally bonded, so that the welding becomes extremely strong.

After passing through the sealing device 10, the opening edge separated from the nine bags 65 by passing through the separation plate 60 is one endless belt 51b.

53b, and is disposed of in the waste channel 62 by air supplied from the exhaust duct 63. on the other hand.

The sealed bag 65 is sent to a separate packaging table or the like from the conveyance end of the conveyor device 3.

[Other Examples]

(Bending guide device) Regarding the bending guide device 33, the impact vi35 was shown above as a specific example thereof, but instead of such a configuration,
It is possible to configure the cam member 73 as shown in FIGS. 12 to 14.

For example, the cam member 73 is connected to the extension portion 34 of the regulating body 34.
The header portion of the bag 65 that has been slid down includes a support portion 74 that serves as the upper surface of the conveyor belt 6 and the road surface, and a cam portion 75 that expands from the support portion 74 in the conveying direction. A receiving plate 76 is provided to prevent the portion 67 from protruding beyond the support portion 74.

According to this embodiment, the bag body 65 is moved from the holding table 14 to the conveyor device 3 after the header part 67 is supported by the support part 74.

The header portion 67 is gradually moved by the cam portion 75 as it is conveyed.
After that, the erected header portion is conveyed along the regulating body 34. Therefore, in the case of this embodiment, the attached guiding device 15 does not need to constitute the sliding path 32 as in the above embodiment, but is simply a means for moving the bag body 65 from the holding table 14 to the support portion 74. If so, it doesn't matter what the configuration is.

(Regulating body) Regarding the regulating body 34, in the above, a plate provided on the frame 2 side is shown. The header portion 67 may be held and regulated.

Incidentally, in the above rotation, the transport path 41 of the header portion is configured by the guide plate 40 provided along the regulating body 34, but the regulating body 34 can be rotated independently without providing such a guide plate 40. Of course, it is also possible to form a conveyance path on which the header portion slides.

(Seal device) In one illustrated embodiment regarding the sealing device 10.

Although the rotary fusing blade 56 that generates heat to fuse and weld the opening edge of the bag body 65 by external heating has been described, as a heating means, 1
It is also possible to use ultrasonic sealing means or high frequency sealing means that melts and welds the opening edge of the bag 65 by internally heating it.

At this time, do not use a single disc-shaped rotating fusing blade (.

A fixed flat plate-shaped fusing blade is used, and a fusing part is formed on the opposite edge of the bag body 65 being transported, and the fusing part is formed by a flat plate part that rubs the fusing edge of the bag body 65 following the fusing part. You may do so.

Regarding the stable feeding device 48, in the above embodiment, an example was shown in which both the upper and lower rotating bodies 49,50 were each constituted by a pair of endless belts.
9. One or both of 50 is not limited to a belt, but may be composed of a plurality of rolls arranged in a row, and either the belt or the rolls increases the frictional resistance against the opening edge of one bag body 65. In order to achieve this, it is preferable to provide a large number of concave and convex strips in a direction perpendicular to the two rotational directions at intervals in the circumferential direction.

〔Effect of the invention〕

According to the present invention as set forth in claims 1 and 2, when the opening edge is welded by the sealing device while the bag loaded with the product is being transported by a conveyor, the opening edge is simply welded. Not only that, but also, after the melt cutting, the melted part is rubbed against the melted part, thereby sufficiently melting the cut edge, so that the cut edge is melted and welded in a build-up shape, and as a result, The effect is that the welding strength is extremely high.

Further, according to the present invention as set forth in claims 3 and 4 of the fifth patent, when the opening edge of one bag is melted and welded by a sealing device while the bag loaded with products is transported by a conveyor, the opening edge of one bag is Since the opening edge is kept closed and sent to the sealing device without being sent to the sealing device in a half-open state, the opening edge is fused neatly without wrinkles, etc., and the fused weld line is neatly cut. It has the effect of Furthermore, while the opening edge of the bag body is tightly closed by the stable feeding device, the fusing part of the sealing device performs fusing, and the fusing part after fusing melts in a build-up shape, so the fusing edges of the film are in close contact with each other. This has the effect that the molten parts of the welded parts are integrated into a lump and the welding strength is high.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the device of the present invention, Fig. 2 is a vertical cross-sectional side view showing the working part, guide device, and bending guide device, Fig. 3 is an open plan view, and Fig. 4 is a longitudinal cross-section during the same operation. A side view, FIG. 5 is a plan view showing the closing device and sealing device, and FIG. 6 is a side view of FIG. 5.
■ Line sectional view, Figure 7 is a plan view of the bag used in the present invention, Figure 8 is a longitudinal sectional view showing the bag when loading products, and Figure 9 is a cross-sectional view showing the bag when it passes through the closing device. 10 is a vertical sectional view showing the bag when passing through the stable feeding device and the sealing device; FIG. 11 is an enlarged sectional view showing the sealing portion of the bag; 1st
Figure 2 is a plan view showing another embodiment of the bending guide device;
The figure is a sectional view taken along the line xm-xm in FIG. 12, and FIG. 14 is a front view showing the cam member of the same embodiment. 3... Conveyor device, 6... Conveyor belt, 7.
...Conveyance table, 8...Working section, 9...Closing device. lO...Seal device, 13...Work table, 14
...Holding table, 15...Guiding device, 18...
Guide tongue piece, 21... Prower 123... Disc-shaped body,
24... Holding hole, 25... Holding plate, 25a... Step, 28... Spring, 29... Slide rail, 32
...Attitude control board, 33...Bending guide device, 34...
- Regulatory body, 34a...extension part, 34b...intersection,
35...Abutment plate 538...Support Rondo, 41...
Conveyance path, 43... Correction rail, 44... Rotating body,
47... Endless belt 48... Stable feed device, 49... Upper rotating body. 50...Lower rotating body, 51a, 51b, 53a. 53b...Endless belt, 56...Rotary fusing blade. 58... Fusing part, 59... Melting part, 60... Separation plate. 61... Chip disposal device 265... Bag body, 66...
・Opening part, 67... Header part, 69... Holding piece, 7
0... Hole, 72... Holder, 73... Cam member.

Claims (1)

[Claims] 1. In a sealing device for fusing and welding the opening edge of a synthetic resin film bag during conveyance: While rubbing the fusing part and the fusing edge of the opening edge subsequent to the fusing part, A bag sealing device comprising: a melting section for melting the bag. 2. It consists of a disc-shaped rotary fusing blade, and has a fusing part on the periphery and a fusion part on the peripheral side near the periphery, according to claim 1. bag body sealing device. 3. A stable feeding device that pinches the opening edge of a synthetic resin film bag being conveyed by a conveyor and runs in synchronization with the conveyor, and a stable feeding device that welds and fuses the opening edge of the bag while the stable feeding device is holding and running. The stable feeding device includes an upper rotary body and a lower rotary body; the sealing device includes a fusing portion and a fusing edge of the opening edge while rubbing the fusing portion and the fusing edge of the opening edge following the fusing portion. A bag sealing device comprising: a melting section for melting the bag. 4. The upper rotating body consists of a pair of endless belts arranged in parallel with each other; the lower rotating body consists of a pair of endless belts arranged parallel to and in parallel with the upper rotating body; fusing the sealing device; The bag according to claim 3, characterized in that the upper and lower rotary bodies are arranged within a juxtaposed interval of a pair of opposing endless belts of both the upper and lower rotating bodies. sealing device.