JP3220071B2 - Method and apparatus for manufacturing bag made of synthetic resin film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a bag made of a synthetic resin film, and more particularly to a bag having a tying piece on a side of an inlet.

[0002]

2. Description of the Related Art A bag made of a synthetic resin film, for example, a garbage bag, generally has a structure in which a bottom portion is formed by heat-sealing and cutting a lower end edge of a tube made of a synthetic resin film having a required size. However, the following types of garbage bags have appeared in order to facilitate transportation to a collection location and loading on a collection vehicle. The first type is shown in FIG.
Using a tube having gussets formed on both sides in the width direction as shown in (a), a pair of protruding pieces g, g are formed on the input port side of the bag formed thereby, as shown in FIG. After the refuse is charged, the charging port side can be tied up, and protruding pieces g ′, g ′ which can also serve as handles are formed on both sides in the bag width direction to facilitate carrying. The second type uses a flat tube without a gusset as shown in FIG. 28, and a pair of projecting pieces g, g for binding are formed on the charging port side of the bag formed thereby.

[0003] It is preferable from the viewpoint of productivity, cost, and the like that such a garbage bag G of the type with a tie piece for binding is manufactured in-line using a tubular film, like a normal garbage bag. However, a garbage bag G with a tying piece
Has a large notch on the inlet side due to the presence of the protruding pieces g, g and the protruding pieces g ′, g ′. Therefore, when manufacturing the garbage bag in-line, these protruding pieces g, g, g ', g'
The remaining portion is formed as scum (cut piece), but the cut piece has no stiffness as a fluff and is easily charged with static electricity, so that it has been difficult to process it in a continuous line. For example, if a simple air blowing method or suction method is used, the reliability of removal of cut pieces is poor, and the cut pieces scatter on or around the line, deteriorating the environment, or collecting the dissipated cut pieces. Work is required. In addition, the noise is intense, which leads to an improvement and a deterioration in the surrounding environment.

[0004] For this reason, conventionally, it has been unavoidable to heat seal the lower end edge of the tube with the gusset to produce a conventional type garbage bag having a bottom portion, and then a large number (for example, 50) of the conventional type garbage bags. Degree) laminated,
A method has been adopted in which this is set in a punching machine outside the line and punching is performed so that the protruding pieces g, g or / and g ′, g ′ remain. For this reason, there was a problem that a lot of labor and man-hours were required for the production. In addition, in this method, a large number of stacked garbage bags with tying protruding pieces are folded and loaded into the outer bag. For this reason, there is also a problem that it is not possible to take a wrapping form in which the garbage bag is taken out one by one at the time of use.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to connect a gusseted or gusseted tube made of a synthetic resin film. It is an object of the present invention to provide a method capable of automatically and efficiently producing a bag with a binding piece one by one. A second object of the present invention is to provide a device which is suitable for carrying out the above-mentioned invention, has a relatively simple structure and is compact. INDUSTRIAL APPLICABILITY The present invention is applied to a case in which a bag having a tie or handle protrusion on the opening side is obtained from a synthetic resin film tube with a gusset as well as a synthetic resin film tube without a gusset. The bag is typically a garbage bag, but is not limited to this.

[0006]

In order to achieve the above-mentioned first object, the present invention provides a method for forming a continuous cutting line in a direction parallel to the feed direction on a predetermined portion of a tube to be an input port, the direction intersecting the feed direction. A cutting line having a predetermined shape in a plane as a discontinuous cutting line, and then heat-sealing the upstream and downstream ends of the cutting line over the entire width of the tube, and then mooring the region of the tube surrounded by the cutting line. While cutting the entire width of the tube in the vicinity of the heat seal and pulling the tube downstream from the mooring portion in the downstream direction, the discontinuous cutting line is forcibly and completely cut to be forwarded as a bag having a pair of projecting pieces. A method of obtaining a bag having a protruding piece from a tube made of a synthetic resin film by holding an area surrounded by a cutting line as a cut piece, wherein the cutting line of the tube is The discontinuous cutting is performed by partially overlapping the cut area with the cut piece already retained, and then locally welding the polymerized portion in this state to form a connected cut piece and mooring, and pulling the tube in the downstream direction. While the line is forcibly and completely cut and forwarded as a bag having a pair of projecting pieces, a step of discharging the connected cut piece so that a required length of the final cut piece remains remains repeated.
(Claim 1)

In order to attain the second object, the apparatus of the present invention comprises a cutting blade for continuous cutting in a direction parallel to a feeding direction on a body for transferring a tube made of synthetic resin film,
A heat-sealing mechanism including a cutting line processing mechanism provided with a cutting blade tool serving as a cutting blade portion for discontinuous cutting in a direction intersecting the feed direction, and a seal blade capable of moving up and down at a downstream position of the cutting line processing mechanism. In addition, a bag cutting mechanism is provided downstream of the heat sealing mechanism, and a film receiving body which is located in the vicinity of a region surrounded by a cutting line provided by the cutting line processing mechanism downstream of the bag cutting mechanism and a film receiving body is penetrated therethrough. A mooring / connecting mechanism having a piercing hot pin that can be raised and lowered is provided, and a region surrounded by the cutting line moored by the mooring mechanism is cut downstream from the mooring / connecting mechanism to form a cut piece. A mechanism for applying a forcible pulling force to the tube in the downstream direction is arranged, and at a portion adjacent to the mooring / connection mechanism,
The apparatus is provided with a mechanism for discharging a suitable amount of cut pieces locally welded and connected by the hot pins.

[0008] In order to achieve the second object, the present invention provides an apparatus for transferring a tube made of synthetic resin film.
A cutting line processing mechanism provided with a cutting tool which is a continuous cutting edge in a direction parallel to the feeding direction and a discontinuous cutting edge in a direction intersecting the feeding direction is provided downstream of the cutting line processing mechanism. At the position, a heat sealing mechanism provided with a seal blade that can move up and down is arranged, and a bag cutting mechanism is provided downstream of the heat sealing mechanism, and a cutting line provided by the cutting line processing mechanism is provided downstream near the bag cutting mechanism. A mooring / connecting mechanism having a film receiver positioned opposite to the enclosed area and a film holder and a press heater which can be moved up and down toward the film receiver;
Downstream from the connection mechanism, a mechanism is provided that applies a forced pulling force in the downstream direction to the tube in order to cut off the area surrounded by the cutting line moored by the mooring mechanism and to form a cut piece, and A mechanism for discharging a suitable amount of cut pieces locally welded and connected by the pressing heater is provided at a portion adjacent to the mooring / connection mechanism.

In any case, the mechanism for applying the forcible pulling force in the downstream direction may be shared by the bag folding device, or may be another means.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 14 show a first embodiment of the present invention of an apparatus and a manufacturing method applied to the case of manufacturing a garbage bag using a tube made of a synthetic resin film with a gusset. Reference numeral 1 denotes a bag manufacturing apparatus according to the present invention, which has a body 1a constituting a feed line of a tube with a gusset (hereinafter referred to as a tube film) A made of a synthetic resin film, and has a tube at or near an upstream end of the body 1a. A gantry 1b is provided to support a raw material A 'in which the film A is wound in a coil shape. Here, the "tube A with gusset" is a synthetic resin tube film in which the folded portions a, a are formed so as to form a V shape inward on both sides in the width direction as shown in FIGS. Means

A cutting line processing mechanism 3 for forming a contour that becomes a pair of protruding pieces g, g of the product is provided on the machine body downstream of the gantry 1b. Further, a pitch feed mechanism 4 for feeding the tube film A at a pitch is provided downstream of the cutting line processing mechanism 3, and between the pitch feeding mechanism 4 and the cutting line processing mechanism 3,
A heat sealing mechanism 5 is provided for forming the bag bottom seal and for forming the binding projections g ', g'. In the vicinity of the downstream of the pitch feed mechanism 4, a bag cutting mechanism 7 for cutting the entire width of the film at a portion between the two-line seals provided by the heat sealing mechanism 5, and a surplus portion for forming protrusions (waste) are provided. A mooring / connection mechanism 6 for mooring and sequentially connecting the leading and trailing projection forming surplus parts to obtain a connected cut piece is arranged adjacently. Also, downstream of the mooring / connection mechanism 6, the tube film (other than the semi-finished garbage bag at this stage) is cooperated with the tube film (except for the semi-finished product garbage bag) to cooperate with the mooring and connecting mechanism 6 to cut off the surplus portion forming the protruding piece to form the cut piece B. A mechanism for applying a tensile force in the downstream direction is provided. And the mooring
A discharge mechanism 8 for discharging a connection cut piece (continuous scrap) B ′ made by this mechanism to the outside of the machine is disposed below the connection mechanism 6.

Each part will be described in detail. The cutting line processing mechanism 3 is shown in FIGS. 1 to 4 and has movable columns 31 at four corners of a base 30 fixed to the film feed path of the body via bearings. And end plates 32 and 32 ′ are fixed to the lower end and upper end of the column 31, and the base 30 is
A cutting blade receiver (receiving die) 33 having a width appropriately larger than the width W of the tubular plastic film (hereinafter, simply referred to as a tube film) A is fixed thereon. An actuator 34 is fixed to the lower surface of the base 30, and its operating portion 340 is connected to the lower end plate 32, and the upper end plate 32 ′ is operated by the operation of the actuator 34.
Can move up and down while maintaining the balance. In this embodiment, a fluid pressure cylinder is used as the actuator 5, but the actuator 5 is not limited to this and may be an arbitrary one such as a crank mechanism. Under the upper end plate 32 ', FIG.
As shown in (c), a continuous cutting blade 36 of a continuous cutting blade 36a and a discontinuous cutting blade 36b is fixed, and near the cutting blade 36, both side regions in the width direction of the tube film. Is provided on the cutting blade receiver 33.

In this example, the cutting blade 36 has a generally W-shaped or E-shaped contour in its entirety, and the continuous cutting blade 36a is arranged in the same direction as the tube film feeding direction as shown in FIG. The cutting blade 36b for discontinuous cutting is formed at four portions in the parallel direction (the right and left rising lines and the inner rising line), and the three cutting edges 36b in the direction intersecting the tube film feeding direction (each rising of the W). (The base of the line portion). The continuous cutting edge portion 36a has a shape in which peaks and valleys are continuous as viewed from the front, and the discontinuous cutting edge portion 36b has a slit 360 having a required width at the base of each valley. The uncut portion is left on the tube film. The outermost portion of the continuous cutting edge portion 36a in the tube film width direction is provided outside the folding tip line of the gussets a, a of the tube film as shown in FIGS. Is preferred. The cutting tool 36 has a block-shaped mounting member 35 in a portion above the cutting edge.
0 is fixed by a mounting screw.

The cutting blade receiver 33 is made of a hard rigid material such as a metal, and has a disk shape wider than the tube film A. The upper surface, that is, the upper surface 330 opposed to the cutting blade 36 is basically a flat surface, but the plane of the cutting blades 36a and 36b is limited only to the region corresponding to the cutting blades 36a and 36b of the cutting blade 36. A projection 331 having a planar contour shape similar to the contour is provided. The protrusion 3
The blade 31 has, for example, a width of 50 times or more the blade width of the cutting blades 36a and 36b of the cutting blade 36 so that the film can be stretched sideways. As shown in FIG. The top surface of the ridge 331 has a straight or very gentle curvature, and both edges of the top surface are connected to the upper surface 330 of the cutting blade support 33 by relatively gentle curves. Below the top surface, there is a blade relief groove 332 wider than the blade width of the cutting blades 36a, 36b. The blade escape groove 33
2 penetrates through the cutting blade receiver 33, and the base 30 below the cutting blade receiver 33 has a waste receiving groove 30 corresponding to the blade escape groove 332.
0 is formed.

The presser 37 is for cooperating with the projection 331 to create tension in the tube film at the time of cutting line processing. The presser 37 opposes the cutting blade receiver 33.
a, a plurality of suspension shafts 37b penetrating the end plate 32 'and fixing the pressing plate 37a at the lower end, the pressing plate 37a and the end plate 3
2 ', an elastic member 37c such as a coil spring or urethane for urging the pressing plate 37a.
The compressible plate 37d, which will be described later, normally has the cutting blade portion 36a,
It is set so as to be located below the blade edge of 36b. The pressing plate 37a is made of a hard and rigid material such as a metal plate, and has a required thickness of a compressible plate 37 on the lower surface of the pressing plate 37a.
d is stretched. As the compressible plate 37d, a moderately soft wear-resistant rubber plate is suitable, but in some cases, a sponge may be used. As shown in FIGS. 2B and 3B, the pressing plate 37a and the compressible plate 37d are provided with cutting blades 36a, 36b.
Groove 3 that almost matches the plane contour of the blade and allows free insertion and removal of the cutting edge.
70, 371. The elastic member 37c has a spring force that appropriately exceeds the spring force (elasticity) of the compressible plate 37d.

The pitch feed mechanism 4 is provided with the cutting line processing mechanism 3.
Film A1 processed by cutting line C
To the downstream when the cutting blade 36 and the presser 37 rise.
This is for feeding the pitch (bag length). The pitch feed mechanism 4 holds the tube film A1 from above and below.
Although a pair of pinch rollers may be used, in this embodiment, as shown in FIG. 1, a pair of gather-up rollers 41 is provided in front of the pair of rollers 40 to allow the film to be seated and to facilitate feeding. A belt type in which a plurality of endless spring belts 42 are wound around two pairs of rollers is used. One of the pair of rollers 40 is the body 1a.
Is driven by a rotary drive mechanism 43 arranged below the lower part.

As shown in FIG. 1, the heat sealing mechanism 5 is provided on the machine body 1a corresponding to the lower surface of the tube film A1 cut along the cutting line so as to cross the entire width of the tube film A1 in a direction perpendicular to the transport direction. The seal blade receiver 50 includes a rubber roll-type seal blade receiver 50 and a seal blade 54 positioned so as to face the seal blade receiver 50. The seal blade 54 has a built-in heater or is fixed to an outer surface. In the example, because of the two-line seal, two parallel blade portions 540a,
540b. The sealing blade 54 is a holder 55
The holder 55 is connected to a rotation drive mechanism 5a provided at a lower portion of the body 1 via a connection rod 550, so that the holder 55 can be moved up and down. In this embodiment, the seal blade 54 has at one end the aforementioned parallel blade portions 540a and 540b for two-line sealing, and at the other end has a single blade portion for one-line sealing. The intermediate portion is detachably fixed to the holder 55 by a screw (not shown). Therefore, when performing one-line sealing described later, the screw may be loosened, the sealing blade 54 may be removed, and the top and bottom thereof may be reversed and fixed with the screw.

The pitch feed mechanism 4 includes a cutting line processing mechanism 3.
The tube film A1 in which the cutting line C is inserted by
The drive control is performed such that a line ct orthogonal to the end of the cutting line shown in FIG. 7A is located between the two parallel blade portions 540a and 540b. Therefore, the tube film A1 cut at the preceding stage is two-line sealed by the blade portions 540a, b and the seal blade receiver 50, thereby forming the bag bottom of the subsequent tube film A and adjoining the preceding tube. The film (already sealed at the bottom) is heat-sealed by the blade portion 540b and the seal blade receiver 50 in two lines S1 and S2 so that the vicinity of the line ct orthogonal to the end of the cutting line is parallel. In FIG. 7B, S1 is a bottom seal, and S2 is a charging port side seal.

The bag cutting mechanism 7 is for cutting the tube film over the entire width along the line ct at a position between the two-line seals S1 and S2 formed by the heat sealing mechanism 5. The movable blade 7b includes a fixed blade 7a and a movable blade 7b. The movable blade 7b is linked to a rotation drive mechanism 5a provided at a lower portion of the body 1 by a link type lever 70.

In this example, as shown in FIG. 5, the mooring / connecting mechanism 6 includes a film receiver 6a fixed to a horizontal frame portion 100 fixed across the body 1a, and a through-hole provided on the film receiver 6a. A plurality of hot pins 6b, 6b having sharp tips which can protrude above the film receiver 6a through the holes 600.
And an actuator 6c for driving the hot pins 6b, 6b up and down, and a film holder 6d which can be moved up and down and arranged at an upper position facing the film receiver 6a. FIG. 5 shows a standby state in the right half and an operating state in the left half. The film receiver 6a is made of a downward U-shaped member, and has a width (lateral direction) greater than the width of the tube film, and is long enough to support at least one of the cut pieces B described later. (Front-back direction). The horizontal frame 10 is positioned so as to be appropriately lower than the height of the tube film transfer line.
0 is fixed to brackets 101 and 101.

In this example, two hot pins 6b, 6b constitute one set of two hot pins 6b.
Are arranged so as to correspond to the region b surrounded by the cutting line C of the semi-finished garbage bag A2 pitch-fed. Each set of hot pins 6b, 6b is fixed to a common holding plate 60, and the holding plate 60 is connected to an actuator 6c, for example, an output portion (piston rod) of a fluid pressure cylinder. (B) As shown in (c), the film is lowered so as to wait at a level lower than the receiving surface of the film receiver 6a. The hot pins 6b have a hollow shape and a heater H is built therein.

The film retainer 6d has hot pins 6b, 6b
In cooperation with, the region b surrounded by the cutting line C of the tube film A2 is sandwiched and moored, and at least corresponds to the region b surrounded by the cutting line C of the semi-finished product garbage bag A2. A through-hole or a recess 601 made of a flat plate or a groove-shaped plate having a width (front and rear) dimension, and allowing the hot pin to enter a portion corresponding to the hot pin 6b.
have. The film presser 6d is held by a holder 62 as shown in FIG. 5A, and can be moved up and down by being connected to a rotation drive mechanism 5a via a link type connecting rod 620. The timing of the descending operation is just before the pitch feed is completed and the movable blade 7b of the bag cutting mechanism 7 moves to start cutting. At this time, the hot pins 6b and 6b rise and are surrounded by the cutting line C at the same time. It is driven up and down as it penetrates the area b.

The pulling force applying mechanism is the mooring / connecting mechanism 6
Is operated to apply tension to the tube film (in this case, a semi-finished product bag) A2 to completely cut the discontinuous cutting line portion to complete the protruding piece bag G. As this pulling force applying mechanism, as described later, a strong traction force is obtained only in the initial stage, and thereafter, an intermittent feeding function in which the pressing surface is separated from the line is obtained.
A fan-shaped or cam-shaped pinch roller may be used. However, in the present embodiment, in order to simplify the mechanism and reduce the size of the device, the folding device 2 for folding the bag G with the protruding piece for binding one or more times into a form suitable for packaging is also used.

That is, the folding device 2 also serving as a pulling force applying mechanism is arranged at a height level substantially equal to the height level of the transfer line of the tube film A2, and the bottom side of the tube film A2 can abut on the downstream side. Stopper 20
0, and the guide table 2a
a, at least one of which is arranged so as to form a V-shaped path below the push-in port 201 provided at a position corresponding to a substantially central portion of the length of the tube film A2.
It has a pair of retracting means 2b and a folding blade 2c which is located on a central extension of the pushing port 201 and which can be inserted into and removed from a V-shaped path by an actuator 2d such as a crank motor. In other words, the pushing port 201 is located at an intermediate position between the bag cutting mechanism 7 and the stopper 200. Retraction means 2
b may be a pinch roller or a pull-in belt roller composed of two pairs of rollers and an endless belt.

At the terminal of the V-shaped path, a push-in port 202 and a retracting means 2b 'are provided so as to be orthogonal to the terminal, and an actuator (not shown) such as a crank motor is provided on the central extension of the push-in port 202. A second folding mechanism provided with a folding blade 2c 'which can be inserted and removed in the V-shaped path is provided. Further, although not shown, a third folding mechanism is provided so as to be orthogonal to the second folding mechanism, and a final folding means is provided. Downstream, although not shown, means for filling the outer bag E with a plurality of garbage bags G with protruding pieces folded one by one is provided. Although the folding device 2 is separate from the garbage bag manufacturing device 1 in this embodiment, it may be an integrated device having a common body.

The discharging mechanism 8 is a means for discharging the connected cut pieces B 'generated by the mooring / connecting mechanism 6 for each bag making cycle and connected in series to the outside of the machine. That is, the area b surrounded by the cutting line C moored by the mooring / connection mechanism 6 is separated by the tensile force applied to the semi-finished garbage bag A by the tensile force applying mechanism 2 to become a cut piece B, which is cut at the next feed pitch. Cutting line C of tube film sent
The area b surrounded by the mark is overlapped with the preceding cut piece B, and is ejected by the hot pins 6b, 6b of the mooring / connection mechanism 6 so as to be sequentially connected to discharge a strip or string.

This discharging mechanism 8 is provided in FIG.
As shown in (a), the airframe 1 below the mooring / connection mechanism 6
It has a pair of pinch rollers 8a laid by brackets 800 and 800 at the end of the pinch a, and an actuator 8b for driving one of the pinch rollers 8a. The pinch roller 8a has a length equal to or greater than the width of the cut piece B, and a linked cut piece B 'is made by the operation of the hot pins 6b, 6b, and in conjunction with this when the next pitch feed starts, A sequence is driven in which the last of the connection cut pieces B ′ is driven by a feed length such that a predetermined length sufficient for welding remains on the film receiver 6 a of the mooring / connection mechanism 6.

Next, the method of the present invention will be described with reference to the above-described apparatus. FIG. 6 shows a state change of the tube film in the present invention, and FIGS. 7 (a) to 7 (d) show details of the state change. ing. 8 to 14 show the steps of mooring the region b surrounded by the cutting line C, forming the cut pieces B, and connecting and discharging the cut pieces B, which are features of the present invention. Before starting bag making,
The tube film A pulled out from the raw material A 'is introduced onto the cutting blade receiver 33 of the cutting line processing mechanism 3, and is extended forward on the machine body 1a so as to pass through the cutting blade receiver 33. The belt is passed between the belts and held there, and is positioned so that one pitch, that is, the length of the bag or more exceeds the mooring / connection mechanism 6. Further, in the initial period of bag making by the present apparatus, since there is no cut piece B, a dummy film is guided out of the machine through the pinch roller 8a of the discharge mechanism 8 from the film receiver 6a of the mooring / connection mechanism 6 in advance. deep.
However, needless to say, in the subsequent normal bag-making, there is always a connected cut piece B ', so that the following description will be made from a state where the first cut piece B is already connected to this dummy film. I will.

In the above state, the cutting line processing mechanism 3 operates to start the bag making operation. In this cutting line processing mechanism 3, the cutting blade 36 and the presser 37 are at the standby position in which the cutting blade 36 and the presser 37 have been raised as shown in FIG.
4 operates, the end plate 32 'descends, and as shown in FIGS. 2B and 4A, the compressible plate 37d on the lower surface of the pressing plate 37a contacts the upper surface of the tube film A,
Slip is prevented by friction with the compressible plate 37d having a high friction coefficient. At this time, the cutting blade portion of the cutting blade tool 36 is not in contact with the tubular film A, and the pressing plate 37a of the pressing tool 37
And stand by through the groove 370, 371 formed in the compressible plate 37d.

As the end plate 32 'continues to descend, the pressing plate 37a presses the tube film A against the cutting blade receiver 33 by the spring force of the elastic member 37c. This is the state shown in FIG. 4 (b). The compressible plate 37d on the lower surface of the pressing plate 37a has a smaller elastic force than the elastic member 37c biasing the pressing plate 37a. From the state where the top surface of the tube 331 is at the same level as that of the top surface of the tube film 331, the region for cutting the tube film A is firmly held between the compressible plate 37d and the projection 331. At the same time, as described above, since the plastic film area other than the cutting line processing area is lowered in contact with the compressible plate 37d, the protrusion 331 relatively projects, thereby generating a tensile force on the tube film A, The cutting line processing scheduled area is tensioned on the top surface of the protrusion 331 by its elasticity,
You become tense with the pins. An area other than the cutting line processing scheduled area is sandwiched between the flattenable compressible plate 37d and the upper surface 330 of the cutting blade receiver 33, and is thereby prevented from slipping.

When the end plate 32 'continues to descend in this state, the cutting blades 36a and 36b of the cutting tool 36 reach the upper ends of the projections 331, and the cutting line processing area in the tension added state as described above. Then, as shown in FIG. 4C, the cutting blades 36a and 36b penetrate the thickness of the tube film A by entering the blade escape groove 332 from the top surface of the protrusion 331. For this reason, even if the tube film A is thick, thin, or stiff, the target cutting line C is processed reliably and neatly.

The cutting blades 36A and 36B are provided with blade escape grooves 332.
After reaching the required depth, escapes from the blade escape groove 332 by the ascending operation of the actuator 34 and then presses the pressing plate 3
One cycle of processing is completed when 7a rises and separates from the tube film A. The scum generated by the above processing is removed from the blade escape groove 332 to the
Fall at 00. Therefore, the cutting edge 3 due to the accumulation of scum
6a and 36b are not restricted. Further, in the case of the structure as in the present embodiment, it is not necessary to provide an unsinkable film receiving mechanism on the upper surface of the cutting blade receiver 33 corresponding to the outside of the projection 331, so that the structure is extremely simplified. There is an advantage that can be.

As a result, a cutting line C having a plane W or a vertical E contour as a whole is formed on the tube film A, but the state of the cutting line is not constant as a whole, and FIGS. 7 and 8A. As described above, four continuous cutting lines c1, c2, c3, and c4 in a direction parallel to the tube feeding direction are processed by the continuous cutting edge portion 36a having a continuous mountain and valley. However, in the direction intersecting with the tube feeding direction, the cutting edge portion 36b for discontinuous cutting has the slit 360, and cutting is not performed at this portion. Continuous cutting line c5, c6, c7
Is processed. The outermost portion of the continuous cutting edge portion 36a is located outside the folding line of the gussets a. For this reason, among the cutting lines C, the continuous cutting lines c1, c
4 is formed outside the folding line of the gussets a and a. With the completion of this processing, actuator 3
4, the cutting blade 36 and the presser 37 are returned to the standby position.

Next, in this state, the pitch feed mechanism 4 is operated, and the tube film A1 with the cutting line is transported forward by the length of one bag. This is the state shown in FIG. 6 as the sealing position. In this case, the upstream end of the cutting line C, that is, the end of the continuous cutting lines c1 and c4
The feed length is set so as to be located between the two parallel blade portions 540a and 540b.

Next, the cutting line processing mechanism 3 is operated upstream, and the heat sealing mechanism 5 is operated downstream. In the cutting line processing mechanism 3, as described above, the actuator 34 descends and moves up and down, so that the continuous cutting line and the discontinuous cutting line are combined at the portion corresponding to the next inlet area in the tube film A as described above. The cutting line C is processed. At this time, in the downstream heat sealing mechanism 5, since the connecting rod 550 is moved by the rotation of the rotation driving mechanism 5a, the sealing blade 54 is lowered, and the two parallel blade portions 540a and 540b are cut along the tube film. A1 is linearly and strongly contacted with the seal blade receiver 50. Thereby, the upstream end of the cutting line C, that is, the upstream side of the ends of the continuous cutting lines c1 and c4, and the downstream side of the cutting line C, that is, the continuous cutting line c1 in the width direction of the tube film A1 on which the preceding cutting line processing has been performed. , C4, two parallel heat seal portions S1 and S2 are formed as shown in FIG. 7B. In this step, the bag bottom of the subsequent tube film A1 is formed by the heat sealing portion S1. In the preceding tube film A2, protrusions g 'and g', which can function as a handle, are formed at the widthwise ends by the heat seal portion S2. At this stage, the region b surrounded by the cutting line C has three discontinuous cutting lines c5, c6, and c7.
Connected to the tube film.

Next, the pitch feed mechanism 4 is operated to connect the preceding and succeeding tube films A1, A.
2 is transported forward by one bag length. By the pitch feed, the preceding tube film A2 is fed to a position where the portion corresponding to the bottom comes into contact with the stopper 200 of the table 2a of the folding device 2. At this time, the preceding tube film A2 is made of two parallel heat seal portions S at the rear end.
The middle between 1 and S2 is adjusted to the position of the blades 7a and 7b of the bag cutting mechanism 5. In this state, the cutting line processing mechanism 3 is operated upstream, the heat seal mechanism 5 is operated downstream, and the bag cutting mechanism 7 and the mooring / connection mechanism 6 are operated further downstream. As a result, a composite cutting line C composed of a continuous cutting line and a discontinuous cutting line is processed in the upstream tube film as described above. Parts S1 and S2 are formed. Then, the heat seal portions S1, S one pitch downstream
The two-processed tube film A2 is cut in its entire width by the blades 7a and 7b of the bag cutting mechanism 5 to become a semi-finished garbage bag. At the same time, the residue area b surrounded by the cutting line C and the cutting line ct is moored, separated into cut pieces B, and the cut pieces B are sequentially connected and automatically discharged out of the line.

FIGS. 8 to 14 show this process step by step. 8 (a) and 8 (b) show that the heat sealing on the upstream side is completed, and the pitch feed mechanism 4 is operated to operate the heat sealing sections S1, S2.
This shows a state where the processed tube film A2 is being sent downstream. This feeding is performed until the downstream end of the tube film A2 comes into contact with the stopper 200, and the middle portion in the longitudinal direction reaches the push-in port 201. FIG.
(A) and (b) show a state in which the feeding is completed,
In this state, the scheduled cutting line ct is located at the position of the bag cutting mechanism 7, and a required portion of the waste area b surrounded by the cutting line C and the cutting line ct, for example, an area near the end of the continuous cutting lines c2 and c3 is just moored. Hot pins 6b, 6b of coupling mechanism 6
Is located on the axis of This is Figure 10
This is the state of FIG. At this time, on the film receiver 6a of the mooring / connection mechanism 6, the dummy film or the end region of the last cut piece B of the connection cut B 'at the end of the operation on the previous day is arranged.

In this state, the film presser 6d connected to the rotary drive mechanism 5a via the connecting rod 620 is lowered, and the hot pin 6 is moved by the actuator 6c.
b and 6b rise. As a result, the opening side of the tube film A2 including the residue area b surrounded by the cutting line C and the cutting line ct is forcibly moved downward by the downward movement of the film presser 6d, and the film film 6a is placed on the film receiver 6a at this position. It is partially overlapped with the cut piece B and is sandwiched between the film receivers 6a. At the same time, the hot pins 6b, 6b rise, so that FIG.
As shown in (a), the hot pins 6b, 6b are
The film protrudes through the through hole 600a and enters the recess or hole 601 of the film holder 6d. As a result, the residue region b surrounded by the cutting line C and the cutting line ct is instantaneously penetrated by the sharp projections of the hot pins 6b, 6b together with the cut pieces B by heat. As shown in FIG. 11 (b), the local portions of the film that are in contact with the peripheral surfaces of the hot pins 6b, 6b are melted, so that the cut pieces B and the debris areas b are locally welded and connected in a ring shape, and are moored in that state. f is a local welded part (connecting part)
It is. The movable blade 7b descends in synchronization with the operation of the hot pin 6b and the film presser 6a.
At the position between the heat seal portions S1 and S2, the entire width of the tube film is cut, and as shown in FIG.

Next, as shown in FIGS. 12 (a) and 12 (b), when the film holder 6d and the movable blade 7b start rising, the folding blade 2c of the folding device 2 is almost simultaneously moved up.
Start approaching 1. This forces the semi-finished product garbage bag downstream. This tensile force also acts on the surplus area b surrounded by the cutting line C and the cutting line ct, but since this area is moored by the hot pins 6b, 6b as shown in FIG. Of the discontinuous cutting lines c5, c6, and c7 formed in the width direction of the cross-section, a separating force is intensively applied from the front and rear to only several connecting portions, whereby the connecting portions are separated and cut. As shown in FIG. 14A, the residue area b surrounded by the cutting line C and the cutting line ct remains pierced by the hot pins 6b, 6b, and becomes a cut piece B. As shown in FIG. 14B, the cut piece B is already connected to the cut piece B generated one cycle earlier as described above.

Thus, as shown in FIG. 7C, the bottom seal s1 is formed.
And a pair of protruding pieces g, g at the center, and a ring-shaped portion on both sides in the width direction.
Protrusions g ', g' suitable for the handle (because they are connected by 2)
Is completed, and the intermediate position is bent by the folding blade 2c and folded into two by the operation of the retracting means 2b. Next, by the second folding mechanism orthogonal to this, or by sequentially operating the third folding means, it is folded several times and reduced as shown in FIG. 9D, and a plurality of the sheets are filled in the outer bag E. It becomes a finished product. Of course, on the upstream side, the cutting line processing and sealing are performed on the subsequent film.

Next, as shown in FIG. 13B, the discharge mechanism 8 and the pitch feed mechanism 4 operate simultaneously with the lowering of the hot pins 6b. Pinch rollers 8a, 8 of the discharge mechanism 8
When a is driven, the cut piece B, which has been welded and connected to the cut piece B of the previous cycle at the edge of the piercing hole of the hot pins 6b by feeding out the connected cut piece B 'to the downstream,
As shown in FIG. 14C, the end regions are hot pins 6b, 6b.
The film is moved along the film receiving stand 6a until it remains at the position on the axis b. On the other hand, when the pitch feed mechanism 4 is operated, the tube film A2 after the next cutting line processing and two-line sealing is fed one pitch until the bottom seal contacts the lower end stopper of the folding device 2. This is the state of FIG. 8, and in the next tube, the surplus area b surrounded by the cutting line C and the cutting line ct partially overlaps with the cut piece B remaining on the film receiving table 6a, and the hot pin When they are pierced by the operation of 6b, 6b, they are locally welded and connected. Then, as described above, the cut piece B is left by the operation of the folding device 2 and is discharged with a part left by driving the pinch roller 8a of the discharge mechanism 8.

Thereafter, the steps shown in FIG. 8 to FIG. 14 are repeated, so that a single-leaf garbage bag G with a binding protruding piece is continuously manufactured from the tube film A. When the second or third folding means (not shown) is sequentially operated, the folding means is folded several times to reduce the size as shown in FIG. Become. Further, the waste area b surrounded by the cutting line C and the cutting line ct generated for each bag is discharged as a connection cut piece B ′.

As described above, between each pitch feed, as a first step, a cut line consisting of a continuous cut line parallel to the tube feed direction and a discontinuous cut line in a direction intersecting the tube feed direction for the tube film A. Because C is processed, the parts that should be unnecessary when the bag is completed do not hang down with the flapper at the next pitch feed, or do not roll up and wind around the rollers of the pitch feed mechanism or the endless gather up belt. Can be sent.
Further, simply by piercing the hot film pin A into the residue area b surrounded by the cutting line C and the cutting line ct and pulling the tube film A3, a cut piece can be obtained, but the cut piece remains moored by the hot pins 6b, 6b. I do. For this reason, every time a certain number of sheets are processed, the bag making operation is stopped,
A complicated operation of extracting the laminated cut pieces from the hot pins 6b, 6b is required. However, in the present invention, not only the cut piece B is obtained but also the cut piece B
15 are automatically and sequentially connected in a belt or string form as shown in FIG. 15 to form a connected cut piece B ', which is automatically discharged, so that the bag making operation is not stopped and the efficiency is extremely increased.
Further, the cut pieces B can be easily collected and reused.

FIGS. 16 to 18 show a second embodiment of the present invention, that is, an example of a method and an apparatus for producing a garbage bag when a tube made of a synthetic resin film having no gusset is used. Also in this case, a cutting line processing mechanism for forming a pair of protruding pieces g, g in a region to be an input port of the tube A, on a body downstream of a pinch roller mechanism (not shown). 3 are provided. In the same manner as in the first embodiment, a pitch feed mechanism 4 for feeding the tube film A at a pitch is provided downstream of the cutting line processing mechanism 3. However, this second aspect,
The difference is that the heat sealing mechanism 5 performs one-line sealing for forming the bag bottom seal, instead of performing two-line sealing as described above.

The cutting line processing mechanism 3 has the same structure as the second embodiment of the first aspect as a whole, and the cutting tool 36 has a generally U-shaped (or W-shaped) contour as a whole.
The continuous cutting edge portion 36a is formed at two portions (in this example, right and left rising lines of U) in a direction parallel to the tube film feed direction without the gusset, and the discontinuous cutting edge portion 3a is formed.
6b is formed at one site (the bottom of U in this example) in the direction intersecting the tube feed direction. Therefore, the cutting line C of the tube film A is divided into two continuous cutting lines c in a direction parallel to the tube feeding direction by the continuous cutting blade portion 36a having a continuous peak and valley as shown in FIG.
1 and c4 are processed. However, in the direction intersecting the tube feeding direction, the discontinuous cutting blade portion 36b has the slit 360, and cutting is not performed at this portion. The continuous cutting line c5 is processed. The pitch feed mechanism 4 has the same configuration as in the first embodiment. The folding mechanism is also used as the tensile force applying mechanism 7 as in the first embodiment.

In the second embodiment, the cutting line processing mechanism 3 is operated to cut the tube film A into a cutting line C having a generally U-shaped contour. As shown in FIG. 17, two continuous cutting lines c1 and c4 in a direction parallel to the tube feeding direction are processed by the continuous cutting blade portion 36a having a continuous mountain and valley. However, in the direction intersecting with the tube feeding direction, since the discontinuous cutting blade portion 36b has the slit 360 and cutting is not performed at this portion, the direction intersecting with the tube feeding direction is the two continuous directions. A discontinuous cutting line c5 connecting the cutting lines c1 and c4 is processed. Upon completion of this processing, the actuator 34 is activated to operate the cutting blade 36 and the holding member 37.
Is returned to the standby position.

Next, in this state, the pitch feed mechanism 4 is operated, and the tube A1 with the cutting line as described above is transferred downstream. In this case, a line intersecting the upstream end of the cutting line C, that is, the end of the continuous cutting lines c1 and c4 is a separating line, and this line is slightly downstream from the operating line of the single sealing blade 54 of the heat sealing mechanism 5. The feed length is set to be located at. When the pitch feed is completed, the cutting line processing mechanism 3 is located upstream, the heat sealing mechanism 5 is located one pitch downstream, and the bag cutting mechanism 7 is located one pitch downstream.
And the mooring / connection mechanism 6 is operated. In the cutting line processing mechanism 3, the actuator 34 descends and moves up and down, whereby the combined cutting of the continuous cutting line and the discontinuous cutting line is performed on the tube film A at a portion corresponding to the inlet area of the next trash bag as described above. Line C is processed. At this time, the sealing blade 5
4 descends and makes the tube A2 linearly contact the seal blade receiving base 51 linearly. As a result, a bottom seal portion s1 is formed in the width direction of the cut tube film A1 at the upstream end of the cutting line C, that is, at the upstream side of the ends of the continuous cutting lines c1 and c4.

At the same time, the film holder 6a is lowered and the hot pins 6b are raised one pitch downstream, as shown in FIGS. 10 and 11 of the first embodiment. This is the first
As in the embodiment, the region b surrounded by the cutting line C is partially overlapped with the cut piece B already cut and connected, and is also pierced by the hot pins 6b, 6b to be moored and The cut piece B is connected by local welding. Subsequently, since the movable blade 7b of the bag cutting mechanism 7 descends, the entire length in the tube width direction corresponding to the end of the bottom seal portion s1, that is, the end of the continuous cutting lines c1 and c4 is cut. Although the opening end of the tube film A2 preceding in this step is cut, it becomes a semi-finished garbage bag A3.
At this stage, the region b surrounded by the cutting line C is connected to the upstream tube film by the discontinuous cutting line c5.

Then, the folding device 2 also serving as a pulling force applying mechanism is operated, and the semi-finished product trash bag A3 is pulled. This traction force also acts on the surplus area b surrounded by the cutting line C and the cutting line ct, but this area is
b, the separation force is intensively applied from the front and rear only to the connection portion of the discontinuous cutting line c5 formed in the width direction of the semi-finished garbage bag A3, whereby the connection portion is removed. Separated and cut to complete a trash bag G with a tying protruding piece having a bottom seal s1 and a pair of protruding parts g, g on both sides in the width direction, and FIGS. 12 and 14A of the first embodiment.
Similarly, the cut piece B composed of the cutting line C and the cutting line ct is created. The cut piece B is partially connected to the preceding cut piece B by a welded portion f. And as this folding progresses and the next pitch feed starts,
The discharge mechanism 8 is operated to discharge the connected cut piece B ′ to the extent that the end of the final cut piece B appropriately remains before the hot pin projecting hole of the film receiver 6a. Therefore, also in this mode, the cut pieces B are sequentially discharged without being scattered, being connected in a band shape or a string shape as shown in FIG. On the other hand, the garbage bag G with the binding protrusion is folded by the folding mechanism 2. Other configurations and steps of the apparatus are the same as those of the first embodiment, and thus the details are omitted.

FIG. 19 shows a modification of the apparatus according to the first or second embodiment of the present invention. In this example, the line downstream from the pitch feed mechanism 4 is not arranged on a horizontal line as in the first mode or the second mode, but is bent at a right angle. The folding device 2 also serving as the mooring / connection mechanism 6 and the pulling force applying mechanism is sequentially arranged in the horizontal direction.
The connection cut piece discharging mechanism 8 is provided diagonally behind the mooring / connection mechanism 6. Since the details of each of these mechanisms are the same as those of the first or second embodiment, the same portions or the same members are denoted by the same reference numerals, and description thereof will be omitted. According to FIG. 19, there is an advantage that the length in the horizontal direction of the apparatus can be shortened by forming the bending line.

In the present invention, the mooring / connecting mechanism 6 in the surplus area b surrounded by the cutting line C and the cutting line ct is not necessarily limited to the case where the hot pins 6b are used. FIG.
FIGS. 0 to 24 show another example of the mooring / connection mechanism 6. In this example, the mooring of the surplus area b surrounded by the cutting line C and the cutting line ct is performed by the pinching method, and the connection is performed by local welding using a pressing heater. That is, in this embodiment, a support 6g is provided on the horizontal frame 100 so as to face the film receiver 6a, and the support 6g is provided on both sides in the width direction of the surplus area b surrounded by the cutting line C and the cutting line ct. A holding actuator (e.g., a cylinder) 6e, 6e having two film holders 6d, 6d opposed to each other at a close position is fixed, and the top of the film holder 6a receives the leading ends of the film holders 6d, 6d. Shallow recess 64
Is provided. FIG. 20 shows a standby state in the right half and an operating state in the left half. A welding actuator (for example, a cylinder) 6j is fixed to the horizontal frame 100 corresponding to the portion between the film retainers 6d, 6d, and the width direction of a surplus area b surrounded by a cutting line C and a cutting line ct at an operating portion thereof. The pressing heater 6h is attached to face the center. Although the pressing heater 6h has a trowel shape in this embodiment, it may be a plurality of point bars.

In this mooring / connection mechanism 6, FIG.
When the pitch is fed after the sealing is completed as in the above, the previous cut piece B (which is already connected to the earlier cut piece) remains on the film receiver 6a. Then, as shown in FIG. 22, the feed pitch is completed,
When the surplus area b surrounded by the cutting line ct stops at the specified position, the pressing actuators 6e, 6e operate to move the film pressers 6d, 6d toward the surplus area b surrounded by the cutting line ct toward the film receiver 6a. And press. At the same time or at a slight time, the welding actuator 6j operates.
The pressing heater 6h is pressed against the center in the width direction of the surplus area b. As a result, the surplus area b surrounded by the cutting line ct is held by the film retainers 6d, 6d and the film receiver 6a while being partially pressed on the previous cut piece B, and is moored. By pressing the heating element 6h, the upper and lower films of the portion are welded. At the same time, the entire width of the film is cut by the bag cutting mechanism 7. At this time, the welding actuator 6j may rise.

When the pulling mechanism operates as shown in FIG. 23 and a traction force acts in the downstream direction, the surplus area b surrounded by the cutting line C and the cutting line ct due to the cutting line state as described above becomes a product. It is cut off from the bag and left on the film receiver 6a as a connection cut piece B. Then, the pressing actuators 6e, 6e immediately move upward, and when the next feed pitch is started as shown in FIG. 24, the discharging mechanism 8 is operated, whereby the downstream side of the connection cut piece B is discharged. The connected cut piece B is moved so that only the length necessary for welding the next cut piece is left on the film receiver 6a. Although FIGS. 20 to 24 show a tube with a gusset, it goes without saying that the present invention is also applied to a tube without a gusset.

Further, in the present invention, the pulling force applying mechanism for pulling the tube (semi-finished product garbage bag) A3 downstream of the mooring portion in the downstream direction is not limited to the mode that also serves as the folding mechanism. Other means than the device 2 may be used. FIG. 25 and FIG. 26 show such an example. In this example, the pulling force applying mechanism applies tension to the semi-finished garbage bag when the mooring / connecting mechanism 6 is operating to completely cut the discontinuous cutting line portion, thereby completing the garbage bag G with protruding pieces. And for transferring the same to the downstream folding device 2. However, when the tube film A1 after the processing of the subsequent cutting line C and the bottom seal processing is advanced by one pitch by the pitch feed mechanism 4, a gap must be formed on the line to allow the movement of the tube film.

Therefore, in order to obtain a strong traction force only at the initial stage and thereafter to obtain an intermittent feeding function in which the pressing surface is separated from the line, an intermittent feeding type pinch roller 90, which is provided with a required area of a normal cylinder, is provided. 90 is used. In this example, the shape is fan-shaped or cam-shaped, but is not limited to this. The pinch rollers 90 are shown in FIG.
As shown in FIG. 5, gears 91, 91 mesh with each other at the ends of the rotating shafts 900, 900, and one of the gears 91 has a rotating body 92 coaxially therewith.
It is designed to be driven by a rotating clutch or a servomotor. The pulling force applying mechanism is not limited to the rotary type, and may be a retractable robot type having a gripper that can be opened and closed at the tip, or a pinch roller that presses the bag body on the downstream side and an upstream side. It may be a sweeping-out type in which a tilting hitting element is provided.

The operation will be described. When the mooring / connecting mechanism 6 (not shown) is activated and the bag cutting mechanism 7 is activated to complete the bag, the pinch of the pulling force applying mechanism is pressed as shown in FIG. The rollers 90, 90 have a sandwiching surface separated from each other, and this state is a state in which the tube film after the next cutting and sealing is sent by the pitch feed mechanism 4 as shown in FIG. But it is maintained. Then, the mooring / connecting mechanism 6 operates on the tube film as shown in FIG.
When the residue area b surrounded by t is in the mooring / connection state, the pinch roller 9 of the pulling force applying mechanism is turned on as shown in FIG.
0, 90 starts rotating, whereby the tube film (semi-finished product bag) is sandwiched between the pinch rollers 90, 90 from above and below and is sent downstream.

This feeding also acts on the surplus area surrounded by the cutting line C and the cutting line ct, but since this area is prevented from moving by the mooring / connecting mechanism 6, it moves in the width direction of the semi-finished garbage bag. A separating force is intensively applied to only a few connecting portions between the cutting lines of the formed discontinuous cutting line from the front and rear, whereby the connecting portions are separated and cut, and are cut by the cutting line C and the cutting line ct. The enclosed area is left as a cut piece B. The pinch rollers 90, 90 are pinched and rotated as shown in FIG.
As shown in (e), the process is continued until the downstream end of the product bag G comes into contact with the stopper 200 of the folding device 2. 26 (f), the folding blade 2c is operated to bend the intermediate position of the bag G with the tying protruding piece and pushed into the V-shaped path, so that the gusset with the tying piece is attached. The bag G is folded in two. In this state, the pitch feed mechanism 4 is operated next, and at this time, the pinch rollers 90, 90 of the pulling force applying mechanism are located at positions where the pressing surface is separated from the phase line, and therefore, the tube of the next cycle by the pitch feed mechanism 4 The transfer of the film is not hindered at all.

[0058]

According to the first aspect of the present invention described above, bags made of a synthetic resin film for binding or with a handle can be manufactured one by one continuously with high efficiency.
In particular, the discontinuous cutting lines c5, c6, and c7 are forcibly and completely cut and forwarded as a bag G having a pair of protruding pieces g, g, while the region b surrounded by the cutting line C is retained as a cut piece. After the completion of the next pitch feed, the area b surrounded by the cutting line C of the tube is partially overlapped with the cut piece already held, and in this state, the overlapped portion is locally welded to connect the cut piece. And the tube is pulled in the downstream direction so that the discontinuous cutting lines c5 and c
6, c7 is forcibly and completely cut off and forwarded as a bag G having a pair of protruding pieces g, g, while the step of discharging the connected cut pieces so that the required amount of the final cut pieces remains is repeated. The area b surrounded by the cutting line C that is unnecessary when the bag is completed
Can be stably fed without hanging down or rolling up and wrapping around the rollers of the pitch feed mechanism or the endless gather-up belt, and the area b surrounded by the cutting line C can be cut into pieces B In addition, in order to automatically discharge the cut pieces B automatically as connected cut pieces B ′ sequentially connected in a strip shape or a string shape,
There is no stoppage in the bag making operation, and the efficiency is extremely high.
An excellent effect that the cut piece B can be easily collected and reused can be obtained.

According to the second and third aspects, a bag cutting mechanism 7 is provided downstream of the heat sealing mechanism 5 and a region b surrounded by a cutting line C provided by the cutting line processing mechanism 3 downstream thereof.
Having a film receiving member 6a opposed to the above and a piercing hot pin 6b, 6b penetrating the film receiving member 6a.
A connecting mechanism 6 is provided, and the tube is forcibly moved downstream from the mooring / connecting mechanism 6 so as to cut the region b surrounded by the cutting line C moored by the mooring mechanism 6 into cut pieces. A mechanism 8 for arranging a mechanism for applying a proper tensile force, and a mechanism 8 for discharging an appropriate amount of cut pieces locally welded and connected by the hot pins 6b, 6b are provided at a portion close to the mooring / connection mechanism 6. Therefore, the region b surrounded by the cutting line C can be made into a cut piece B with a simple structure, and the cut pieces B can be automatically and sequentially ejected automatically and sequentially in a band shape or a cord shape. Excellent effect can be obtained. According to the fourth aspect, since the folding device also serves as a mechanism for applying a forcible pulling force to the tube in the downstream direction, an excellent effect that the device can be simplified and the device length can be shortened. Is obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a method and an apparatus for manufacturing a synthetic resin film bag according to the present invention.

2A is a vertical sectional front view showing an example of a cutting line processing apparatus according to the present invention in a standby state, and FIG. 2B is a vertical sectional front view showing the same processing state.

FIG. 3A is a plan view of a cutting blade receiver in FIG. 2;
(B) is a partially cutaway bottom view of the holding tool in FIG. 2, (c).
1 is a perspective view showing an example of a cutting tool according to the present invention.

4A is an enlarged sectional view showing a first stage when the cutting line processing apparatus is operated, FIG. 4B is an enlarged sectional view of the same second stage, and FIG. 4C is an enlarged sectional view showing a third stage. It is.

5A is a rear view showing a mooring / connection mechanism and a discharge mechanism according to the present invention, and FIG. 5B is an enlarged sectional view of a main part of FIG.
(C) is the same longitudinal side view.

FIG. 6 is a plan view showing a state of bag making of a synthetic resin film according to the first embodiment of the present invention.

7A is a plan view showing a cutting line processing step, and FIG.
FIG. 3 is a plan view showing a state of mooring after heat sealing, (c) is a plan view showing a separating and cutting step, and (d) is a plan view showing a folded state.

FIG. 8A is a plan view of the tube film in the heat-sealing completion pitch feeding stage in the present invention, and FIG. 8B is a cross-sectional view showing the state of the pitch feeding mechanism and the mooring / connection mechanism at that time.

9A is an enlarged view of a pitch feed mechanism and a mooring / connection mechanism in a heat seal completion pitch feed stage, and FIG. 9B is a plan view showing a state of the film tube and the preceding cut piece at that time.

FIG. 10A is a plan view of a tube film showing a completed pitch feed state, and FIG. 10B is a cross-sectional view showing a state of a pitch feed mechanism and a mooring / connection mechanism at that time.

11A is an enlarged sectional view showing an operation state of the mooring / connection mechanism, FIG. 11B is an enlarged view of a main part thereof, and FIG. 11C is a plan view showing a state of the film tube and the preceding cut piece at that time. It is.

FIG. 12A is a plan view of the tube film at the time of starting the separation of the surplus portion, and FIG. 12B is a cross-sectional view showing the state of the pitch feed mechanism and the mooring / connection mechanism at that time.

FIG. 13A is a plan view of the tube film in a state where discharge of connected cut pieces and pitch feed have been started, and FIG. 13B is a cross-sectional view showing a state of the pitch feed mechanism, the mooring / connection mechanism, and the discharge mechanism at that time. is there.

14A is a plan view showing the state of the tube film and the connection cut piece in the process of separating the surplus portion, FIG. 14B is a plan view showing the state of the connection cut piece when the separation is completed, and FIG. It is a top view showing the one-side discharge state.

FIG. 15 is a plan view showing a state of the connection cut piece in the first mode.

FIG. 16 is a side view showing a second embodiment of the method and the apparatus for manufacturing a synthetic resin film bag according to the present invention.

FIG. 17 is a plan view showing the state of bag making of a synthetic resin film according to the second embodiment of the present invention.

FIG. 18 is a plan view showing a state of a connection cut piece according to the second embodiment of the present invention.

FIG. 19 is a side view showing another example of the bag making apparatus and the method applied in the present invention.

FIG. 20 is a rear view of the apparatus showing another example of the mooring / connection mechanism according to the present invention.

21 (a) is a plan view of a tube film showing a pitch feed start state, FIG. 21 (b) is a plan view showing a state of a connection cut piece at that time, and FIG. 21 (c) is a state of a pitch feed mechanism and a mooring / connection mechanism. FIG.

22 (a) is a plan view of a tube film showing a completed pitch feed state, FIG. 22 (b) is a plan view showing a state of a connection cut piece at that time, and FIG. 22 (c) is a state of a pitch feed mechanism and a mooring / connection mechanism. FIG.

23 (a) is a plan view of the tube film at the time of starting to separate the surplus portion, (b) is a plan view showing the state of the connection cut piece at that time, and (c) is the pitch feed mechanism and the mooring / connection at that time. It is sectional drawing which shows the state of a mechanism.

24 (a) is a plan view of a tube film in a state where discharge of connected cut pieces and pitch feeding are started, FIG. 24 (b) is a plan view showing a state of the connected cut pieces at that time, and FIG. 24 (c) is pitch feed at that time It is sectional drawing which shows the state of a mechanism, a mooring / connection mechanism, and a discharge mechanism.

FIG. 25 is a side view of a pulling force applying mechanism applicable to the present invention and a driving mechanism thereof.

26 (a) to (f) are side views showing stepwise a feeding state of the tube film when the tensile force applying mechanism of FIG. 25 is used.

FIG. 27 (a) is a perspective view showing an example of a synthetic resin bag targeted by the present invention, and FIG. 27 (b) is a perspective view showing the same use state.

FIG. 28 is a perspective view showing another example of the synthetic resin bag targeted by the present invention.

[Explanation of symbols]

 1a Airframe 2 Folding device 3 Cutting line processing mechanism 4 Pitch feed mechanism 5 Heat seal mechanism 6 Mooring / connecting mechanism 6a Film receiver 6b Hot pin 7 Bag cutting mechanism 8 Discharge mechanism c1, c2, c3, c4 Continuous cutting line c5, c6 c7 Discontinuous cutting line 36 Cutting blade tool 36a Cutting blade part for continuous cutting 36b Cutting blade part for discontinuous cutting 54 Seal blade

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B31B 1/86 321 B31B 1/20 321 B31B 35/00 B31B 23/14 B31B 23/64 B31B 23/94

Claims (6)

(57) [Claims] (1) At a predetermined portion of a tube to be an input port,
A cutting line having a predetermined shape is formed on a plane having a direction parallel to the feeding direction as a continuous cutting line and a direction intersecting the feeding direction as a discontinuous cutting line, and then heat-sealing the upstream and downstream ends of the cutting line over the entire width of the tube. Then, the area surrounded by the cutting line of the tube is moored, and the entire width of the tube is cut in the vicinity of the heat seal, and the discontinuous cutting line is forcibly pulled by pulling the tube downstream from the mooring portion in the downstream direction. A method of obtaining a bag having a protruding piece from a tube made of a synthetic resin film by completely cutting into a bag having a pair of protruding pieces and feeding the bag as a cut piece while holding a region surrounded by a cutting line as a cut piece. The area surrounded by the cutting line of the tube is partially overlapped with the cut piece which has already been detained, and in this state, the overlapped portion is locally welded to connect the cut piece. Mooring while making the pieces, pulling the tube in the downstream direction to forcibly and completely cut the discontinuous cutting line and feeding it forward as a bag having a pair of protruding pieces, while connecting the cut pieces to the final cut pieces A process of discharging the resin so that the required length remains. 2. A cutting blade portion for continuous cutting 36a in a direction parallel to the feeding direction and a cutting blade portion for discontinuous cutting 36b in a direction intersecting with the feeding direction on a body 1a for transferring a tube made of a synthetic resin film. A cutting line processing mechanism 3 having a cutting blade tool 36 is provided. At a downstream position of the cutting line processing mechanism 3, a heat sealing mechanism 5 having a vertically movable sealing blade 54 is arranged. Downstream, is a bag receiving mechanism 6a and a film receiving body 6a located on the downstream side in the vicinity of a region b surrounded by the cutting line C formed by the cutting line processing mechanism 3 and is vertically movable through the film receiving body 6a. Mooring and linking mechanism 6 having hot piercing hot pins 6b, 6b, and cutting the area b surrounded by the cutting line C moored by the mooring mechanism 6 downstream from the mooring and linking mechanism 6 To make a piece A mechanism for applying a forcible pulling force in the downstream direction is provided to the shaft, and a cut piece locally welded and connected by the hot pins 6b, 6b is provided at a portion adjacent to the mooring / connection mechanism 6. An apparatus for manufacturing a bag made of synthetic resin film, comprising a mechanism 8 for discharging an appropriate amount. 3. A cutting blade portion for continuous cutting 36a in a direction parallel to the feed direction, and a cutting blade portion for discontinuous cutting in a direction intersecting with the feed direction on a body 1a for transferring a tube made of synthetic resin film. A cutting line processing mechanism 3 having a cutting blade tool 36 is provided. At a downstream position of the cutting line processing mechanism 3, a heat sealing mechanism 5 having a vertically movable sealing blade 54 is arranged. Downstream, a bag receiving mechanism 6a and a film receiving body 6a located in the downstream of the area facing a region b surrounded by the cutting line C formed by the cutting line processing mechanism 3, and capable of moving up and down toward the film receiving body 6a. Na film holder 6
mooring and linking mechanism 6 having d, 6d and pressing heater 6h
Is provided downstream of the mooring / connecting mechanism 6, and the tube is forcibly pulled in the downstream direction to cut the region b surrounded by the cutting line C moored by the mooring mechanism 6 into cut pieces. A mechanism for applying force is provided, and the mooring /
An apparatus for manufacturing a bag made of a synthetic resin film, characterized in that a mechanism 8 for discharging a suitable amount of cut pieces locally welded and connected by the press heater 6h is provided at a portion close to the connection mechanism 6. 4. The apparatus for producing a synthetic resin film bag according to claim 1, wherein the mechanism for applying the forcible tensile force in the downstream direction is a bag folding mechanism. 5. The method for producing a bag according to claim 1, wherein the tube made of a synthetic resin film has a gusset. 6. The method for producing a bag according to claim 1, wherein the tube made of a synthetic resin film is a tube without a gusset.