JPS6240267B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt-like member folding device for folding a belt-like member made of plastic film or the like every predetermined length.

In recent years, plastic bags have been widely used as packaging materials because they are hygienic and can be mass-produced at low cost. In addition, such a continuous member of plastic bags (hereinafter referred to as a continuous plastic bag-like member or simply a continuous bag-like member) can be folded in half and stored in a cardboard box, etc., and used as a pop-up tissue paper as needed. A structure in which the sheets can be taken out and used one by one has also been proposed (Japanese Patent Application Laid-open No. 57-96948, No. 57-142872, and Japanese Patent Application No. 1984-194004).

By the way, as a device for folding the continuous bag-like member, the folding device advances and retreats from at least one side in the width direction of each of the continuous bag-like members, which is a band-like member, toward the folded end position. The belt-shaped member is alternately wound around the folded-edge retention member while reciprocating between the folded end position of the belt-shaped member in a straight line or in an arc along the longitudinal direction of the bag-shaped member. The present applicant has already proposed a device equipped with a belt-like member feeding mechanism that supplies the belt-like member in a hanging manner (Japanese Patent Application No. 57-7125).
No. 57-9788, No. 58-1886). According to such a previously proposed folding device, there is no risk of damaging the band-shaped member, and the band-shaped member can be folded reliably and at a high speed.
However, since the supply mechanism reciprocates between the folded end positions, it is difficult to properly operate the supply mechanism and the folded end holding member without colliding with each other. had. Further, there is also a difficulty in operating both the supply mechanism and the holding member using a common drive source. Of course, these difficulties have been solved by the previously proposed device, but this tends to make the overall structure of the device complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a folding end portion of a band-like member, which simplifies the overall structure of the device and allows the band-like member to be folded reliably and quickly.

Unlike the previously proposed device which is equipped with a feeding mechanism that reciprocates between the folded end positions of the strip, the present invention uses a pair of film feed arms that swing alternately to the folded end positions of the strip. A strip member feeding mechanism is provided that supplies the strip member to the folded end position by alternately guiding the member from both sides, and this feeding mechanism supplies at least the strip member at the folded end position of each strip member. The belt-like member is configured to be alternately wrapped around the folded end holding member that advances and retreats from one side in the width direction toward the folded end position, and the supply mechanism and the folded end holding member are prevented from colliding with each other. The purpose of the present invention is to achieve the above-mentioned object by making it possible to operate the feed mechanism and the folded end holding member without any problems, thereby simplifying the connection and interlocking structure of the supply mechanism and the folded end holding member.

Another object of the present invention is to prevent the folded side of the strip member from being stretched when the strip member is fed to the folded end position by swinging the film feed arm of the supply mechanism. An object of the present invention is to provide a folding device for a band-like member, which allows the tatami work to be properly performed as specified.

For this reason, in the present invention, a folding end receiving member is provided at each folding end position of the strip member, and the strip member is fed to one folding end location by swinging of the film feeding arm of the supply mechanism. At this time, the above object is achieved by sandwiching the strip member between the folded end receiving member and the folded end holding member at the other folded end position.

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

FIG. 1 shows an embodiment of a belt-like member folding device according to the present invention. A bag-making machine 10 is attached to a frame (not shown) constructed by combining H-shaped steel, etc.
is installed, and the tension adjustment mechanism 20 and the folding device 40 according to the present invention are incorporated in this frame. Note that FIG. 2 shows this folding device 40.
FIG.

A plastic strip member 1 as a strip member is continuously fed into the bag making machine 10 from a so-called raw material. This plastic strip member 1 is
For example, a cylindrical film formed by an inflation molding method or the like is flattened. The bag making machine 10 includes a heat sealer 11 and a heat sealer 1.
1, and a receiving block 13 facing the heat sealer 11 and the cutter 12 at a predetermined distance. It is configured to move forward and backward to the side. Further, a slit 14 into which the tip of the cutter 12 is inserted is formed in the receiving block 13.

The heat sealer 11 and the cutter 12 advance toward the receiving block 13 every time the plastic strip 1 is fed by a predetermined amount, and as a result, the plastic strip 1 becomes a continuous bag-like member (a strip member) as shown in FIG. There is no change in the fact that there is) 2. That is, the heat sealer 11 welds both sides of the plastic strip member 1 along the width direction at predetermined length intervals to form a sealed portion (bag bottom) 3, and the cutter 12 welds the plastic strip member 1 to the same predetermined length. Perforations 4 and two notches 5 are formed along the width direction in each case. Therefore, the continuous bag-like member 2
perforation 4 every time you cut along perforation 4.
A large number of plastic bags can now be obtained in which the opening edge is the opening edge and the sealing part 3 is the bag bottom.

Continuous bag-like member 2 formed by bag-making machine 10
via a guide roll 15 fixed to the frame and a position adjustment roll 16 whose mounting position can be adjusted along the horizontal direction in FIG.
The tension adjustment mechanism 20 provided above the folding device 40 is supplied.

This tension adjustment mechanism 20 is fixed at a predetermined position on the frame side, with a dancer 21 such as a roller or rod around which the continuous bag-shaped member 2 is wound after being wound around the position adjustment roller 16, and with a reversing roll 22. The continuous bag-shaped member 2 is sent from the dancer 21 to the reversing roll 2, and from the reversing roll 22 via the guide roll 23 to the folding device 40. There is. The dancer 21 is attached to one end of the swing link 24. The swing link 24 has, for example, an L-shape, a weight 25 is fixed to the other end, and a bent portion is swingably supported on the frame side via a support shaft 26. The slack of the continuous bag-like member 2 is absorbed by such a dancer 21.

Further, the surface of the reversing roll 22 is formed of an extremely smooth metal surface, and this reversing roll 22 is constantly rotated in the opposite direction to the feeding direction of the continuous bag-shaped member 2.
This allows the dancer 21 to move extremely quickly in order to absorb the slack in the continuous bag-shaped member 2.

After passing through the tension adjustment mechanism 20, the continuous bag-like member 2 is fed to a folding device 40 according to the invention.

The folding device 40 is equipped with a rotary drive source (not shown) such as a motor, and the output shaft of this rotary drive source or the output shaft of a transmission (not shown) connected to the output shaft is a drive shaft located on the lower side in FIG. 41, and a cam-type rotary disk 42 and a cam 43 are fixed to this drive shaft 41. The cam type rotary disk 4
2 is connected to the reciprocating shafts (not shown) of the heat sealer 11 and the cutter 12 of the bag making machine 10 through a cam follower, link, etc. not shown, and the heat sealer 11 and the cutter 12 are moved to a predetermined position by the rotation of the cam type rotary disk 42. They are now advancing and retreating at the same timing. Further, one end of a first drive rod 44 is connected to the cam-shaped rotary disk 42, and the other end of the first drive rod 44 is connected to one end of a link 45 such as a dogleg shape.

Further, one end of a second drive rod 46 is connected to the end of the link 45.
The other end of the link 6 is connected to one end of a link 47 having the same shape as the link 45. The two links 45 and 47 are arranged at the same height on both the left and right sides in FIG. 1, and are each supported swingably on the frame side via a mounting shaft 48.

One end of an arm drive rod 49 is connected to the other end of the two links 45 and 47, respectively.

The configuration of the other ends of these two arm drive rods 49 will be described below.
That is, as shown in FIG. 4, for example, a rectangular rod-shaped base end block 51 of a predetermined length connects the arm drive rod 49 via a connecting shaft 52 that projects from one end of the base end block 51. It is connected to the end side. The base end block 51 has pillow-shaped legs 53 at both ends, and a support shaft 54 is rotatably inserted through the legs 53. When the cam-type rotary disk 42 is rotated, this rotational force is transferred to the rod 44. ,46, link 4
5, 47, and the arm drive rod 49 to the proximal block 51.
1 is configured to swing around a support shaft 54 at a predetermined timing.

A base end portion of a film feed arm 55 is fixed to one side of each of the base blocks 51 facing each other, and the film feed arm 55 pivots about the support shaft 54 as the base block 51 swings. It is designed to be rocked (lowering down ← → standing up). A plate-shaped end pressing plate 56 of a predetermined width is fixed to the tip of the film feeding arm 55 at right angles to the film feeding arm 55 (in the width direction of the continuous strip member 2), and the lower end of this end pressing plate 56 The edges are rounded.

This end pressing plate 56 is connected to the film feeding arm 5.
When the bag 5 is laid down horizontally, it is arranged at one of the two folded end positions of the continuous bag-like member 2. That is, when the film feed arm 55 is swung from an upright state to a collapsed state, the end pressing plate 56 is pressed against the continuous bag-like member 2 stretched from the tension adjustment mechanism 20 to the folding device 40. After contacting one side of the continuous bag-like member 2, the continuous bag-like member 2 is guided and supplied to the one folded end position while being taken from the tension adjustment mechanism 20. Here, block 5
1. A feeding mechanism 50 is constructed which guides the continuous bag-like member 2 alternately from both sides by the legs 53, the arm 55, and the pressing plate 56 to guide the bag-like member 2 to the folded end position. .

A holding plate 58 is attached to the lower end surface of the film feed arm 55 at a substantially central position in the longitudinal direction via a mounting pin 57.
is a direction perpendicular to the longitudinal direction (continuous bag-like member 2
(width direction). This pressing plate 58 presses the substantially central portion of the folded continuous bag-like member 2 stacked on the pedestal 61 (see FIG. 1) of the stock mechanism toward the pedestal 61 side. There is. From the upper end surface of this pedestal 61, rod-shaped insertion members 62 that are protruded from a cart (not shown) and penetrated through the pedestal 61 extend upward. The overlapping notches 5 (see FIG. 5) of the shaped members 2 are inserted through them, and the distal ends of these insertion members 62 are loosely inserted into escape holes 63 bored at predetermined positions in the holding plate 58. It is becoming more and more common.
Further, as the folding operation progresses, the pedestal 61
It is configured to be lowered by itself while interlocking with the folding operation, or to be lowered by using the pressing force of the pressing plate 58.

The cam 43 is a circumferential cam, and this cam 43
There are two cam followers 71 and 72 on the cam surface of
are engaged to grip the cam 43 from both sides along the substantially radial direction. One cam follower 71 is attached to the swinging end of a connecting rod 73.
The other end of 3 is swingably fixed to the frame via a fixed bearing 74. One end of a connecting rod 75 is connected to a predetermined position in the longitudinal direction of the connecting rod 73, and the other end of the connecting rod 75 is connected to the lower end of a swinging rod 76.

The other cam follower 72 is attached to the lower end of the swinging rod 77. For example, the swinging rod 77 and the connecting rod 73 are connected to each other by a tension coil spring (not shown), so that the two cam followers 71 and 72 are connected to each other by a tension coil spring (not shown). is arranged so that it is not separated from the cam 43 at all times.

The upper ends of the two swinging rods 76 and 77 are arranged to be at substantially the same height as each other, and each is swingably supported by the frame via a fixed bearing 81 at a predetermined position in the longitudinal direction. There is. Parallel rods 82 and 83 of a predetermined length are arranged parallel to the swing rods 76 and 77, respectively. The lower end sides of the parallel rods 82 and 83 are fixed at predetermined positions in the longitudinal direction intermediate portions of the swing shafts 76 and 77 via the horizontal transfer shaft 84, and the upper end sides of the parallel rods 82 and 83 are fixed to the horizontal transfer rod 8.
5 to the upper ends of the swinging rods 76 and 77.

If we explain the respective horizontal transfer rods 85 provided on both the left and right sides in FIG. 1, as shown in FIG. , these connecting shafts 9
The other end sides of each of the connecting pieces 92 are connected to predetermined positions of the connecting pieces 92, respectively. The connecting piece 92 is rotatably supported by a rotating shaft 94 protruding from the upper end surface of the connecting block 93 on an imaginary plane along the horizontal direction. Further, both ends of the connecting block 93 are fixed to support blocks 95, and the support shafts 54 are suspended at predetermined positions of these support blocks 95. Here, the blocks 93, 95 and the support shaft 54 constitute a base block 96,
This base block 96 is supported by the frame so that its mounting position can be adjusted in the horizontal direction. In other words, the structure is such that the distance between the two base blocks 96 arranged on both the left and right sides in FIG. 1 can be adjusted.

The proximal ends of opening/closing arms 101 are fixed to the two connecting pieces 92, respectively, and a pair of opening/closing wings 10 as folding end holding members are attached to the distal ends of these opening/closing arms 101.
2 is fixed. These opening/closing wings 102 are arranged on the same imaginary plane along the horizontal direction, and are configured to open/close on the imaginary plane by rotation of the connecting piece 92. One side edge of the opening/closing wing 102 is arranged at the folded end position of the continuous bag-like member 2, and in the expanded state, the distance between the tips of the opening/closing wings 102 is in the width direction of the continuous bag-like member 2. They are further spaced apart by a predetermined length than the length of .

A folded end receiving member 104 is arranged so as to be able to come into contact with one side edge along the folded end position of the opening/closing wing 102 in the closed state, and this folded end receiving member 10
4 and the opening/closing wing 102, and when the continuous bag-like member 2 is guided to the folded end position by the film feeding arm 55 of the supply mechanism 50, the continuous bag-like member 2 is This is to prevent the folded side of the member 2 from being pulled. The folded end receiving member 104 has two rotating pieces 1 each having a bearing 105 rotatably fitted onto the support shaft 54.
06, and the folded end receiving member 104 is rotatably supported by the support shaft 54 via this rotating piece 106. Further, a stopper 107 is fixed to the rotating piece 106, one end of a tension coil spring 108 as a biasing means is fixed to this stopper 107, and the other end of this spring 108 is fixed to the frame side. The folded end receiving member 104 is constantly urged toward the folded end position by the spring 108, but the leg portion 53 is able to come into contact with the stopper 107, so that the leg portion 53 is in a predetermined position. When in the rotation position, the leg portion 53 and the stopper 107 are in contact with each other, and the stopper 107 is forcibly rotated along the rotational direction of the leg portion 53.
04 is also configured to be able to rotate in a direction away from the folded end position against the force of the spring 108.

Next, the operation of this embodiment will be explained with reference to FIGS. 6A to 6D.

Due to the rotation of the rotary disk 42 and the cam 43, the pair of opening/closing wings 10 provided on both folding end sides are rotated.
2 opens and closes at a predetermined timing, and
Both film feed arms 55 swing between the upright state and the collapsed state without colliding with each other and in synchronization with the opening/closing operation of the opening/closing blades 102. On the other hand, the bag making process in the bag making machine 10 is performed by the same drive source as the folding device 40 as described above, and is operated at a predetermined timing with the folding operation in the folding device 40.

After pulling out one end of the plastic strip member 1 from the original fabric and passing it through the bag making machine 10, the position adjustment roll 16, and the tension adjustment mechanism 20, the pulled out end is fixed to the pedestal 61 of the stock mechanism, etc. Each operation in the bag making machine 10 and the folding device 40 is started. The bag-making machine 10 forms seal portions 3, perforations 4, and cuts 5 at predetermined lengths on the plastic strip-like member 1 to form a continuous bag-like member 2.
The continuous bag-like member 2 is folded into the holder 61 by the film feeding arm 55.

FIG. 6A shows the film feed arm 55 and opening/closing blade 102 corresponding to the operating state shown in FIG.
The operating status of the is shown. In this figure, the film feed arm 55 on the right side in the figure is laid down at the folded end position on the left side in FIG. A folded end portion is about to be formed in the bag-like member 2. Inside the end pressing plate 56 (on the base end side of the film feed arm 55), the opening/closing wing 102 on the left side in FIG. 1 is closed and positioned, and as shown in FIG. The folded end receiving member 104 is retracted to a position recessed by a predetermined length from the folded end on the left side. That is, the proximal block 5
1, the stopper 10 comes into contact with the leg 53 when the leg 53 is rotated counterclockwise in FIG.
7, the rotating piece 106 is also forcibly rotated counterclockwise against the spring 108, and the folded end receiving member 104 is retracted in the aforementioned direction.

Then, as shown in FIG. 6B, the film feed arm 55 which was in the lying state is swung in the direction of standing up, and the swinging arm on the left side in FIG. 1 is changed from the standing state to the lying state. and sway. The continuous bag-shaped member 2 supplied from the tension adjustment mechanism 20 is guided to the folded end position on the right side in the figure by the end pressing plate 56 at the tip of the film feeding arm 55 which is in the collapsed state. At this time, the pair of opening/closing wings 102 on the left side are maintained in a closed state.
Therefore, the continuous bag-like member 2 is wound around the opening/closing wing 102 as the film feed arm 55 shifts to the laid-down state. At this time, the pair of opening/closing wings 102 on the right side are shifted from the closed state to the expanded state.

Further, since the leg portion 53 of the base end block 51 that supports the base end of the film feed arm 55 on the left side is rotated clockwise, the stopper 107 that was locked to this leg portion 53 is also rotated clockwise. The folded end receiving member 104 is rotated, that is, the folded end receiving member 104 moves to the folded end position under the force of the tension coil spring 108, and the folded end receiving member 104 and the opening/closing wing 102 move to the folded end position.
A continuous bag-like member 2 is firmly held between the two. As a result, when the continuous bag-like member 2 is fed to the folded end position by the swinging of the film feed arm 55, no tensile force is applied from the clamping portion of the continuous bag-like member 2 to the folded side. The continuous bag-like member 2 is reliably fed out from the tension adjustment mechanism 20 side.

As shown in FIG. 6C, when the film feed arm 5 on the left side in the figure is completely laid down,
The opening/closing wing 102 on the right side is closed when it enters the base end side of the end pressing plate 56 at the tip of the film feeding arm 55 that has fallen down. At this time, the film feed arm 55 on the right side is in an upright state.
The film feed arm 55 in this upright state is
As shown in FIG. 6D, when it starts to swing to the collapsed state, the continuous bag-like member 2 is attached to the opening/closing wing 102 on the right side.
As the film is wound, the continuous bag-shaped member 2 supplied from the tension adjustment mechanism 20 is guided to the folded end position on the left side by the end pressing plate 56 at the tip of the film feed arm 55. I have to go. At this time, the film feed arm 55 on the left side has already been swung from the laid down state to the upright state. Further, at the folded end position on the right side, the continuous bag-like member 2 is held between the opening/closing wing 102 and the folded end receiving member 104.

When the film feed arm 55 on the right side is completely lowered, it will be in the same state as shown in FIG. The continuous bag-like members 2 which are sequentially folded to a certain folding width are stacked.

As the pair of film feed arms 55 are repeatedly oscillated, the cradle 61 of the stock mechanism
The upper continuous bag-like member 2 is attached to a film feed arm 55.
Each time it is laid down, the central portion is pressed down by the presser plate 58, and as a result, the insertion member 62 is reliably inserted into the overlapping notches 5. Further, as is clear from the above, when the continuous bag-like member 2 is fed to one folded end position by the swinging of the film feed arm 55, the opening/closing wing 102 and the folded end position are Since the continuous bag-like member 2 is held between the receiving member 104 and no tensile force is applied to the folded side of the continuous bag-like member 2, the insertion member 6
It is possible to eliminate the problem that the cut 5 of the continuous bag-like member 2 into which the bag 2 is inserted is stretched and torn.

Further, the length of the continuous bag-like member 2 between the bag making machine 10 and the folded end portion 40 is adjusted by adjusting the position of the position adjustment roll 16 along the horizontal direction,
By adjusting the length of this continuous bag-like member 2, the pedestal 61
The positions of the cuts 5 of the folded continuous bag-like members 2 stacked on top of each other will be accurately overlapped.

In addition, in the continuous bag-like member 2 between the bag making machine 10 and the folding device 40, sagging is effectively prevented by the dancer 21 and the reversing roller 22 that speeds up the movement (return) of the dancer 21. , wrinkles, etc. will not occur.

This embodiment has the following effects.

Since the continuous bag-like member 2 is alternately guided from both sides by a pair of film feed arms 55 that repeatedly oscillate and is fed to the folded end position, it does not rotate like the previously proposed device. There is no need for a mechanism for converting motion into linear reciprocating motion, a mechanism for operating the reciprocating supply mechanism and the folded end holding member without colliding with each other, and various other devices. Therefore, the configuration of the entire device can be extremely simplified, and the movement of the entire device can also be simplified. Therefore, it is possible to operate the device at a higher speed than the previously proposed device, and the folding speed is improved.

In addition, since the number of parts is significantly reduced, each part can be made larger and stronger, increasing the strength of the device, and making it possible to apply sufficient force to each part, making it easier to fold. It can be made certain. Furthermore, since the strength of the entire device is increased in this way, it can sufficiently withstand high-speed operation, and from this point of view as well, there is an effect that the folding speed is further improved.

Furthermore, since the configuration is simple, there is no risk of malfunction, and ease of handling is improved. Further, noise, vibration, etc. are also reduced.

Furthermore, when the film feed arm 55 guides the continuous bag-like member 2 to the folded end position, the folding end pressing plate 56 applies appropriate tension to the continuous bag-like member 2 and 2 (to smooth out wrinkles, etc.), the folding accuracy of the continuous bag-like member 2 is improved, and it is possible to fold the continuous bag-like member 2 accurately to a certain fold width and neatly without wrinkles. can.

Furthermore, the film feed arm 55, the opening/closing blade 102, etc. are mounted as a unit on the base block 96, and the distance between the two base blocks 96 can be adjusted by moving the two left and right base blocks 96 in the horizontal direction. By changing the , the continuous bag-like member 2 can be folded into fold widths of various sizes,
It is extremely convenient.

Furthermore, in the previously proposed device, the insertion member of the stock mechanism was moved up and down at appropriate timing because the supply mechanism reciprocated between the positions of both folded ends and because it was necessary to ensure that the strip member was inserted. In this embodiment, the continuous bag-like member 2 is fed to the folded end position by the swinging film feed arm 55, and the insertion member 62 is forced into the notch 5 by the holding plate 58 attached to the arm 55. Since the structure is such that the insertion member 62 is inserted through the folding device 40, there is no need to move the insertion member 62 up and down in synchronization with the folding operation of the folding device 40. Therefore, the structure of the stock mechanism is also simple.

Note that in carrying out the operation, the insertion member 62 and the notch 5 in the continuous bag-like member 2 are not necessarily required, and if the insertion member 62 and the notch 5 are not provided in this way, the continuous bag-like member 2 is When the member 2 is fed to the folded end position, the opening/closing wing 102 and the folded end receiving member 104
By holding the continuous bag-like member 2 between the folding and folding ends so that no tensile force is applied to the folded side, it is possible to eliminate the problem of the position of the already folded folded end moving and shifting. .

In addition, although the folding end holding member is the opening/closing wing 102, the folding end holding member may be rod-shaped or the like, and is not limited to one that rotates, but one that reciprocates linearly. Moreover, it is not limited to the one provided on both sides in the width direction of the continuous bag-like member at the folded end position, and may be provided only on one side. In short, the belt-like member is wrapped around the folded end part. Any material that holds the folded end portion from the inside may be used.

In addition, the mounting pin 57 is configured to be able to move forward and backward with the amount of advancement toward the pedestal 61 side being regulated, and to be biased toward the pedestal 61 side. 62 and the presser plate 58 is not lowered, so that the film feed arm 55 is not completely lowered, the mounting pin 57 is forcibly moved to the opposite side from the pedestal 61 against the biasing force. This movement may actuate a switch that stops the entire device. With this configuration, if the folding position shifts for some reason, it will automatically stop immediately, so it is convenient to minimize the number of defective products.

Furthermore, since the folding position can be easily adjusted by adjusting the position of the position adjustment roll 16 in the horizontal direction, when the insertion member 62 is not inserted through the notch 5, for example, the perforation 4 is aligned with the folding end position. may be equal.

Furthermore, the band-like member is not limited to the continuous bag-like member 2, but may be a band-like member such as a plastic sheet, and the material is not limited to plastic.

Furthermore, in the embodiment described above, the supply mechanism 50 and the opening/closing blades 102 are mechanically connected to one drive shaft 41 and are interlocked in relation to each other. Each of them may be provided with a separate drive source and may be configured to be linked by sequence control.

As described above, according to the present invention, it is possible to provide a folding device for a band-like member, which has a simplified overall configuration and is capable of folding a band-like member reliably and quickly.

Further, according to the present invention, the folded side of the strip member is not pulled when the strip member is fed to the folded end position by the swinging of the film feed arm of the supply mechanism. Tatami work can be carried out properly as prescribed.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the overall configuration of an embodiment in which a belt-shaped member folding device according to the present invention is combined with a bag making machine, with the frame omitted; FIG. 2 is a plan view of the folding device; The figure is a perspective view showing an example of a continuous bag-like member processed by the bag making machine in the embodiment, FIG. 4 is a perspective view showing an enlarged main part of the embodiment,
FIG. 5 is a perspective view showing the continuous bag-like member in a folded state, and FIGS. 6A to 6D are perspective views showing different folding states in the embodiment. DESCRIPTION OF SYMBOLS 1, 2...Plastic band-like member as a band-like member, continuous bag-like member, 3... Seal part, 4... Perforation, 5... Notch, 10... Bag-making machine, 16...
...Position adjustment roll, 20...Tension adjustment mechanism, 21
... Dancer, 22 ... Reversing roll, 50 ... Supply mechanism, 51 ... Base end block, 53 ... Leg section, 5
5... Film feed arm, 56... End pressing plate, 58... Holding plate, 61... Holder of stock mechanism, 62... Insertion member, 96... Base block, 101... Opening/closing arm, 102... ... Opening/closing wing as an end holding member, 104... Folding end receiving member,
107...stoppa.

Claims (1)

[Claims] 1. The pair of film feed arms 55, which swing alternately to the folded end position of the strip member 2, guide the strip member 2 alternately from both sides to feed the strip member 2 to the folded end position. Supply mechanism 5 for belt-shaped member 2
0 and at each folded end position of the strip member 2, and moves forward and backward from at least one side of the folded end position in the width direction of the strip member 2 toward the folded end position,
A folded end holding member 102 on which the belt-shaped member 2 is alternately wound by the supply mechanism 50, and a belt-shaped member 2
are provided at each folding end position, and when the strip member 2 is fed to one folding end position by the swinging of the film feeding arm 55 of the feeding mechanism 50, the other folding end position is In the band member 2
A folding device for a band-shaped member, comprising: a folding end receiving member 104 that clamps the folding end holding member 102 together with the folding end holding member 102.