JPH0321407B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a band pool device in a packaging machine.

[Prior art]

As shown in Fig. 6, numeral 10 denotes a so-called vertical fully automatic packing machine, with controls forming various mechanisms for feeding the band, gripping the tip end, pulling back the feeding side, tightening, cutting, and gluing the overlapping part of the band. The main body 11 has a substantially rectangular box shape and has a built-in main body 1.
A U-shaped band guide arch 12 is provided at the center of a work table 18 placed on the upper surface of the main body 1, spanning both longitudinal edges thereof, and the band guide arch 12 is provided on one side of the main body 11 in the longitudinal direction. Band reel 13 capable of loading band coils in orthogonal directions
and the band guide arch 1 of the main body 11
The coiled band loaded on the band reel 13 is placed on the side surface of the pool box 21 on the same plane as the pool box 21.
The pool unit 30 is comprised of a pool feed unit 20 that feeds water into the pool. As shown in FIG. 7, the pool box 21 constituting the pool unit 30 is constructed by attaching one side of a front plate 43, which is a horizontally long rectangular plate, to the main body outer plate 44 with a gap slightly larger than the width of the band. The pool box 21 is formed in a box shape so as to face each other in parallel, and is sized so that at least a larger amount of bands can be accommodated in the pool box 21 than the amount of bands supplied to the band guide arch 12 in one package. be done. Reference numeral 14 denotes a back pool, which, like the pool box 21, is formed into a box shape from a plate material 39 that faces the outer panel 44 of the main body with a gap slightly larger than the band width.
It communicates with the internal space adjacent to the pool box, forms a part of the pool box, has its upper half facing the rear plate 46 on the outer panel 44 through the gap, and faces the tension arm 15, which will be described later. band exit 49
is formed. Reference numeral 45 denotes a door cover, which is provided by a hinge on the upper side edge of the plate member 39, facing the protruding piece 46' of the rear plate 46, so that the space in this area can be opened and closed. That is, the band outlet 49 is located on an extension of the upper edge of the front plate 43 in the space of the back pool 14. The configuration of the pool feed unit 20 provided at the lower edge of the pool box 21 is as shown in FIG.
Pulley 3 via a shaft supported by a bearing inside
1, and this pool 31 is connected to a pool motor (not shown) by a V-belt 32. Further, the idler roller 23 is supported by an eccentric shaft 24, a lever 47 is attached to one end of the eccentric shaft 24, and an adjuster star pin 27 is inserted through the other end. One end of a spring 38 is connected to the lower end of this adjuster star pin 27, and the other end of this spring 38 is connected to a spring hook 36 attached to the bearing case 25. The spring 38 always rotates the eccentric shaft 24 in a fixed direction (clockwise direction in FIG. 8) via the adjuster star pin 27, thereby bringing the idler roller 23 into sliding contact with the drive roller 22. An angled balance bar 2 is attached to the eccentric shaft 24.
9 is slidably supported on a shaft, and this balance bar 29
is inserted into the pool box 21. Further, an interlocking rod 28 is protruded from the balance bar 29, one end of a spring 37 is connected to the tip of the interlocking rod 28, and the tip of an adjustment bolt 34 is connected to the other end of the spring 37. The adjustment bolt 34 is attached to be able to move back and forth within the screw hole of the disc member 35, and as the adjustment bolt 34 moves back and forth, the tensile force of the spring 37 that pulls the interlocking rod 28, that is, the balance bar 29 upward, increases. be adjusted. A limit switch (not shown) is provided on the lower surface of the bearing case 25 with its lead piece facing below the tip of the interlocking rod 28. That is, when the balance bar 29, that is, the interlocking rod 28 slides downward due to the tension of the band in the pool box 21 and comes into contact with the reed piece of the limit switch, the pool motor is turned off and the drive roller 22 is stopped. Conversely, when the amount of band in the pool box 21 decreases and the balance bar 29, that is, the interlocking rod 28 slides upward and separates from the lead piece of the limit switch, the pool motor is turned on.
This causes the drive roller 23 to rotate. In addition, 26 is a pool shooter equipped with a groove for passing the band. Also, in FIG. 6, the tension arm 15
is slid by the rotation of the cam and tightens the band. The entrance of the band guide groove formed on the upper part of the tension arm 15 is
5 is supported so as to face the opening edge of the band outlet 49 of the back pool 14 (see FIG. 7). In a device configured as described above, loading a band is performed by releasing the brake of the band reel 13, pulling out a band of a desired length from the band coil of the band reel 13, and then moving the lever 47 in the counterclockwise direction as viewed in the drawing. The end of the band is inserted between the idle roller 23 and the driving roller 22 from the pool shooter 26, and the gap 5 between the front plate 43 and the plate material 39 is
3 to the tension arm 15 inside the door lid 45, then feed the band to the outside of the main body, and then insert it into the feed unit (see FIG. 8) consisting of a pair of feed rollers (not shown) that pull it back. . After this band loading is completed, pool box 21
Since there are no bands pooled yet,
The balance bar 29 is moved to the seventh position by a spring 37.
The idle roller 23 is at the position indicated by the two-dot chain line in the figure, and the idle roller 23 is constantly driven by the spring 38.
It is in sliding contact with 2. When the motor power is turned on, as shown in FIG. 8, the tip of the interlocking rod 28 is separated from the reed piece of the limit switch (not shown) due to the bias of the spring 37, so the pool motor is turned on and the drive roller 22 rotates. This allows the idle roller 23 to come into sliding contact with the drive roller 22 under the bias of the spring 38.
The band reel 13 is rotated through the band, and the band is fed into the pool box 21 by rotating the band reel 13. When the band in the pool box 21 reaches a predetermined amount and the balance bar 29 slides downward in FIG. 8 due to its tension, the interlocking rod 28 integrated with the balance bar 29 It slides counterclockwise and comes into contact with the lead piece of the limit switch. At the same time, the pool motor turns off.
Then, the feeding of the band into the pool box 21 is stopped. Next, the band pooled in the pool box 21 is fed into the band guide arch 12, and when the amount of bands in the pool box 21 decreases, the interlocking rod 28 rotates together with the balance bar 29 in the clockwise direction in the paper of FIG. Then, the tip of the band separates from the lead piece of the limit switch, and this signal turns the pool motor ON again, causing the drive roller 22 and idler roller 23 to rotate, feeding the band into the pool box 21, and then feeding a predetermined amount of the band. When the balance bar 28 is pooled, the balance bar 28 is pushed down again.
Stop feeding the band in the same way as above. In this manner, the above operation is repeated as the number of hands in the pool box 21 decreases by supplying bands to the band guide arch 12, and the amount of bands in the pool box 21 is maintained at a predetermined amount. Adjustment of this pool amount is performed using the adjustment bolt 34 as described above.
This can be done by appropriately changing the tensile force of the spring 37, that is, the timing of the sliding movement of the balance bar 28. After the band is supplied to the band guide arch 12, it is pulled back by a pair of feed rollers (not shown) and tightened by the tension arm 15. The supply side of the band is left in a somewhat slack state in the back pool 14 provided in the main body 11. will be pooled.

【problem】

In a band pool device equipped with the conventional pool amount detection mechanism consisting of the above-mentioned balance bar, the conventional pool box 21 provided parallel to the band guide arch 12 is necessarily installed inside the main body 11. other equipment installed in
For example, since it is located deep inside the electrical control section, the operator must open the front cover of the main body 11 and go deep inside the main body 11 when loading the band or adjusting the amount of band pooling by adjusting the biasing force of the spring 37. In addition to having to insert your hand, which is dangerous and extremely troublesome, the drive roller is constantly rotating, so depending on the amount of bands in the pool box,
This has disadvantages such as the band being rubbed between the two rollers and the balance bar flapping around which is unpleasant. In addition, because the waveform deformation of the band is irregular due to the weight, hardness, and width of the band, when the position where the band is pooled in the pool box shifts, the band tension or gravity applied to the balance bar may change. Due to the significant difference, the limit switch operation was inaccurate and unreliable, and the pool volume sensing was very slow, which sometimes had a negative impact on the packaging process. For example, when using a band with relatively high tension (strong waist) such as a polyester band, even if the amount of band pool in the pool box is small, it may push the balance bar. Situations such as not being able to play in the pool may occur. In addition, in special packaging machines where the total length of the arch is extremely long, it is essential to secure a band pool amount that is equal to or greater than the total length of the arch so that the band can be supplied by the feed roller into the arch. In this type of band pool device, the pool box 21 is installed inside the main body 11 as described above, so the size of the pool box 21 is regulated to be less than the size of the main body 11, and a sufficient amount can be obtained. This makes it difficult to pool bands. Furthermore, the pooled band gradually loses its elasticity and loses the tension that presses the balance bar.
The pressure for detecting the amount of pooling may drop, causing more bands to be fed and pooled than necessary, and the bent portions of the previously pooled bands may become creased, and if the packaging machine is not used for a certain period of time. If you do not pull out all the bands from the pool box of the packing machine, the folded band will get caught in the band guide arch the next time the band is fed due to the folding, which will interfere with feeding the band into the band guide arch. It had the disadvantage of causing

[Purpose of the invention]

The present invention was developed to eliminate the drawbacks of the conventional balance bar method described above, and its purpose is to always accurately and reliably pool a desired amount of bands without damaging the bands. It is possible, and due to the tendency of the band to fold, the next time it is packed,
To smoothly supply a necessary amount of bands to a band guide arch by providing a band pooling device that does not cause a situation such as the pooled bands becoming unusable.

[Technical means]

In order to achieve the above object, the present invention includes a main body 11 that is equipped with various mechanisms necessary for packing, such as supplying, tightening, gluing, and cutting bands, and a main body 11 that is attached to one side of this main body so that the band is positioned parallel to the side. A band guide arch 12 is provided for arranging a band around the object to be packed, and the band is passed from the band coil 65 to the band supply mechanism via a pool box 21 having a band inlet 48 and an outlet 49 and a gap slightly wider than the band width. In an automatic packing machine installed to supply bands to a band guide arch 12, a plurality of fixed rollers 3 are supported above the pool box 21 near one side of the pool box at appropriate intervals, and A dancer roller 4 is provided that can freely move back and forth on the same straight line from near the one side of the pool box near the fixed roller to the lower part of the pool box 21 near the other side facing this one side. However, a detection means for detecting the upper limit and lower limit of the dancer roller 4 is provided, and a stopper 1 is provided for fixing the band at the band entrance and band exit of the pool box 21 or near the band supply tightening mechanism. During the band tightening to adhesive cutting process, the dancer roller 4 is lowered to the lower limit, and a detection signal from the lower limit detection means causes the dancer roller 4 to rise to the upper limit, and the tightening process end signal causes the dancer roller 4 to be lowered to the lower limit. The band fixing operation of the stopper 1 provided at the band entrance of the box 21 is released, and the band fixing operation is performed by the stopper 1 at the band exit of the pool box 21 or near the band supply and tightening mechanism.

[Effect]

Therefore, the dancer roller 4 is placed above the pool box 21 near one side of the pool box.
is stopped above the fixed roller 3, the band is inserted between the plurality of rollers 3 and 4, and the band feeding and tightening mechanism and the pool box 2 are inserted.
The stopper 2 near the band entrance 48 of 1 is opened, and the band of this part is fixed with the stopper provided near the band exit 49, and the dancer is placed below in the pool box 21 near the other side facing the one side. By moving the roller 3, the band can be alternately reciprocated between the plurality of rollers 3 and 4, and then the dancer roller 3 can be returned to the one side to pool the band in a slack state, During the descent of the dancer roller 3, when pulling back and tightening the band of the packing machine, the band is fixed by the band supply and tightening mechanism or the stopper at the band entrance 48 of the pool box 21, and the stopper 1 provided near the band exit 49 is opened. By storing the pulled back and tightened bands in the pool box 21, the stopper is used for subsequent band welding and cutting and until the band pool amount reaches a predetermined amount for the next band feeding. 1
By operating and keeping the band fixed,
By stopping the bands from entering the pool box 21 from the packing machine main body 11 side, it is possible to always accurately pool a certain amount of bands into a state where they can be immediately fed into the packing machine.

【Example】

The details of the present invention will be explained below based on figures showing examples. Note that the same reference numerals are used for the same members as in the conventional example. In FIG. 1, numeral 10 is a so-called fully automatic packing machine, which includes a main body 11 equipped with various mechanisms necessary for packing such as band feeding, tightening, gluing, and cutting, and a band attached to one side of this main body 11 and running parallel to the side. A band guide arch 12 is provided for arranging the band around the object to be packaged. 18 is a work table on which objects to be packed are placed. 21 is a pool box made of four boards 6
are located in the longitudinal direction from the upper part of the pool box 21 near one side of the pool box to the lower part of the pool box 21 near the other side facing this one side, and are lined up at appropriate intervals. The plate material 6 and the outer plate 43 face each other with a gap slightly wider than the band width to form a box-shaped box forming a band storage part. is formed.
In the upper part near one side of the pool box, a band inlet 48 is provided on the right side in FIG. 1, and a band outlet 49 is provided on the left side. Band entrance 48 and band exit 49 in pool box 21
A stopper 1 and a stopper 2 are provided near each of. Limit switches LS7 and LS8 are attached to the stoppers 1 and 2, and a band presence detection signal between the two is outputted to the inside of the packaging machine body, the electromagnetic valve of the air cylinder of the dancer roller, and the electric control system, which will be described later. Also, this stopper 1, 2
A rod 7 is provided which is operated by an air cylinder or a solenoid, and when the limit switch is operated, the rod 7 protrudes and grips and fixes the band between it and one end of the support plate 9. In addition, the support plate 9
The other end protrudes outside the pool box 21,
A guide roller is attached. Four rotatable fixed rollers 3 are rotatably mounted at equal intervals in the pool box 21 at positions below the line connecting the band openings 48 and 49 of the four plates 6. 4 is a dancer roller, and as shown in FIG. 2, a sliding plate 66 connected to an air cylinder 17 provided on the back side of the pool box 21 via a reciprocating member 16 can freely slide on guide poles 67 and 68 of 2. The groove 5 between the plates 6 is installed on the same straight line from the vicinity of the one side surface to the lower part of the pool box 21 near the other side surface facing this one side surface, so that it can be reciprocated, that is, can be raised and lowered. The dancer rollers 4 are respectively supported on three shafts 19 that protrude through the grooves 5 between the plates 6, and are configured to be able to reciprocate on the grooves 5 in synchronization with the rise and fall of the reciprocating member 16. There is. The three dancer rollers 4 are arranged in the vicinity of the four fixed rollers 3, that is, at intermediate positions, and are arranged at equal intervals. The one side of the pool box 21 is slightly above the line connecting the upper band entrances and exits 48 and 49 in the pool box 21 near one side of the pool box 21, and the lowering limit, that is, the movement limit of the other side can be adjusted by the control mechanism of the air cylinder. An arbitrary position below the pool box 21 near the other side facing the side of
(the position indicated by the symbol Z in the figure). Inside the pool box 21 are limit switches LS1 (not shown) and LS that operate at the upper limit and lower limit positions of the dancer roller 3, respectively, and generate detection signals for the upper and lower limits of the dancer roller 3.
2 is provided. Note that 65 is a band coil. The operation of each device in the above-described embodiment will be explained below. To load the band into the pool box 21, the dancer roller 4 is stopped at the upper limit position of the pool box 21 near one side, and the stopper 1 and the stopper 2 are both in the OFF state with the upper limit switch LS1. Do this without fixing the band. First, a suitable length of the band is pulled out from the band reel, and the band is guided into the pool box 21 through the band entrance 48. The band is formed between the gap between the stopper 2 and the support plate 9 and the fixed roller 3.
and dancer roller 4, and stopper 1
The band is pulled out of the pool box 21 from the band outlet 49 through the gap between the band and the support plate 9, and fed between feed rollers (not shown) in the packing machine main body from the band inlet of the packing machine main body. At this time, the lead piece of the limit switch LS3 installed near the feed roller inside the packaging machine body detects that the band has reached that part, and the limit switch LS3
In response to the signal, the stopper 1 is turned ON, and the pool box outlet 49 end of the band is fixed, and loading of the band is completed. In the initial state of the device after band loading is complete,
As mentioned above, the stopper 1 is a limit switch installed near the feed roller inside the packing machine main body.
It is turned on by the signal from LS3, and the rod 7 grips and fixes the band to the support plate 9. The band in the pool box 21 is in a straight line between the fixed roller 3 and the dancer roller 4, and the stopper 2 is in a straight line between the fixed roller 3 and the dancer roller 4.
When OFF, the band on the entrance 48 side of the pool box 21 is not fixed. The activation switch operates the air cylinder 17 on the back of the pool box, and the reciprocating member 16, ie, the dancer roller 4, begins to move downward into the pool box 21 near the other side. At this time, since the band is gripped and fixed by the stopper 1 on the band outlet 49 side of the pool box 21,
The band is fed into the pool box while being pulled out from the band coil 65, and is suspended between the fixed rollers 3 and the dancer rollers 4 as it alternately reciprocates. When the dancer roller 4 reaches its lower limit (the position indicated by the symbol Z in FIG. 1), the pool box 21
Limit switch LS installed on the other side of
2 causes the air cylinder 17 to operate in reverse, causing the dancer roller to begin its upward return movement. This causes the band to pool downwards. When the dancer roller 3 reaches its upper limit, the signal from the limit switch LS1 installed at the top of the pool box 21 turns off the stopper 1, turns on the stopper 2, and turns the exit 49 of the pool box 21 off.
The side band fixation is released, and the band on the entrance 48 side is fixed. At the same time, the feed roller within the packaging machine body starts normal rotation to feed the band into the band guide arch 12. The band goes around the guide arch 12 and reaches a slide table (not shown) that forms part of the band welding and cutting mechanism. Limit switch LS installed under this slide table
4 emits a signal to detect the arrival of the band tip, and this signal starts pulling back and tightening the band. That is, the press member grips the band end side due to the rotation of the camshaft (not shown), and at the same time as the feed roller starts to rotate in reverse and begins to pull back the band, the air cylinder 17, which detects the rotation angle of this camshaft, is turned on and the dancer roller 4 is turned on. It moves downward again and backpools the pulled-back band into the pool box 21 (the position indicated by the symbol X in FIG. 1). At this time, since the stopper 2 is ON, the band does not flow from the band coil 65 to the pool box 21 even though the dancer roller 4 is moving downward, making it possible to pool an excess amount of band. To prevent. When the band is wound around the object to be packed, the reverse rotation of the feed roller is completed by a known pullback end detection device. At this time, the tension arm 15 further moves to tighten the band while the stopper 1 remains OFF and the stopper 2 remains ON. During this time, the dancer roller 3 continues to move downward, and the amount of band tightening is also backed up into the pool box 21. When the band tightening is finished, the band tightening completion detection device turns on stopper 1 and turns stopper 2 on.
Each switches to OFF, and at the same time the band melts,
The cutting and gluing steps are completed. During this time, the dancer roller 3 continues to move downward by the air cylinder 17, and the band for next packaging is pooled into the pool box 21 from the band coil 65 through the band inlet 48. When the dancer roller 3 reaches its lowering limit near the other side of the pool box 21, a limit switch LS2 provided at the bottom of the pool box 21 is activated, and the air cylinder 17 causes the dancer roller 3 to turn upward. When the dancer roller 3 reaches its upper limit, the limit switch LS1 (not shown) provided at the top of the pool box 21 turns stopper 1 OFF and stopper 2 ON, respectively, and the band is ready for feeding next time. . Thereafter, feeding of the band, pulling back while backpooling the band, tightening, cutting of the band, adhesion, and pooling of the band in an amount necessary for the next band feeding are repeated in the same manner. A second embodiment of the present invention is shown in FIGS. 3, 4, and 5. In FIG.
6. Consists of a packing machine main body 11 and a band guide arch 12. The packaging machine main body 11 has a band supplying, tightening, adhesion, and cutting mechanism, and is suspended and fixed to an elevating frame 56 driven by a motor M via a chain 69 installed on one side of the frame 55. It is provided to be movable up and down together with the elevating frame 56. As shown in FIG. 4, inside the packing machine main body 11, there is a bearing case 51 which rotatably supports a pair of feed rollers 52 which are driven by a motor and which feed the band to the guide arch 12. A tension arm shutter 62 having a bent portion in the middle, connected to the tension arm 15, and sliding together with the tension arm 15 is built in. The tension arm shooter 62 is provided with a stopper 1 which uses a solenoid or the like to project a rod 7 to grip and fix the band. The band guide arch 12 consists of upper arches 57, 58, vertical arches 59, 60, and lower arch 61, which are in a horizontal position with the work table 18 on the lower surface of the main body 11 when the main body 11 of the packing machine is at its upper limit. It has band detachment means such as a flap. The band is guided from the band coil 65 outside the inverted packaging machine 54 into the packaging machine main body 11 via the band guide 33. In FIGS. 3 to 5, a pool box 21 has a fixed roller 3 and a dancer roller 4 as in the first embodiment, and a band reel box 13 having a control panel on the top is arranged side by side. The stopper 1 is not provided near the band exit 49,
As shown in FIG. 5, the handle roller 41 can freely come into contact with and separate from the idle roller 43 by means of a crank mechanism 63.
is provided. The band outlet 49 is provided diagonally above the fixed roller 3, and the band guide 33
It is directly connected to the band insertion slot. The rest is the same as the first embodiment. In the second embodiment, the band is loaded by turning off the stopper 2, stopping the dancer roller 4 at its upper limit, and
The stopper 1 provided on the tension arm shutter 62 is OFF, the handle roller 41 and the idle roller 42 are separated by the crank mechanism 63, and the lifting frame 56 and the packaging machine body 11 are at the upper limit (the position shown by the solid line in FIG. 5). ). A suitable length of the band is pulled out from the band reel box 13, and the band is guided into the pool box through the band entrance 48. As in the first embodiment, the band is pulled out from the stopper 2, between the fixed roller 3 and the dancer roller 4, through the gap between the handle roller 41 and the idle roller 42, and out of the pool box 21 from the band outlet 49. 54 into the band insertion opening of the band guide 33. In this state, the handle roller 41 is brought into sliding contact with the idle roller 42 via the band by the crank mechanism 63, and by rotating the handle roller 41 by hand or other means, the band is moved from the band guide 33 to the packing machine. The band is fed into the bearing case 51 having a pair of feed rollers 52 via the band entrance of the main body 11, the tension arm shutter 62, and the tension arm 15. A limit switch LS3 is provided inside the bearing case 51, and detects that the band has reached the feed roller 52 and activates the stopper 1 provided on the tension arm shutter 62.
Turn it on and the band loading is complete. Thereafter, as in the first embodiment, the dancer roller 4 is lowered by the air cylinder 17 of the pool box 21, and the band is pulled out from the band coil 65 and pooled. When the dancer roller 4 reaches its lower limit (the position indicated by the symbol Z in FIG. 5), the limit switch LS2 causes the dancer roller 4 to move upward, completing the band pooling. When the dancer roller 4 reaches its upper limit, the limit switch LS1 turns on the stopper 2 and turns off the stopper 1 of the tension arm shutter 62.
The state is reached and feeding of the band begins. The feed roller rotates normally, and the band moves to the upper arch 57, the fifth
The band is fed in the order of the left vertical arch 59 in the figure, the lower arch 61, the left vertical arch 60, and the upper right arch 58 in the figure, and then the limit switch of the table 18 is fed.
When the band tip reaches LS4, the band tip side is gripped by a press member (not shown), and band tightening and pulling back are started. In the second embodiment, the band is pulled back while the packaging machine body 11 is lowered together with the lifting frame 56 that is lowered by chain drive at the same time as the feed roller is reversed. In parallel with the band being detached from each arch and being wound around the object to be packed, that is, at the same time as the band is being pulled back, the air cylinder 17 is activated, the dancer roller 4 is lowered, and the band is pulled back. (reference numeral Y in Figure 5). When the packing machine body 11 further descends, the object detection limit switch LS5, which protrudes below the work table 18, collides with the object to be packed and is activated. The limit switch LS5 stops the packaging machine body 11 from descending, and at the same time, the feed roller ends in reverse rotation, the dancer roller 4 stops descending (the air cylinder 17 becomes free), and the band pulling back ends. At the same time as the band is pulled back, the stopper 1 provided on the tension arm shutter 62 is turned on.
Then, the tension arm 15 is moved by an air cylinder (not shown) to tighten the band.
The air cylinder 1 for the dancer roller 4 receives a signal indicating the end of band melting, cutting, and crimping by known means.
7 is turned ON again. Due to the action of the limit cam, the packing machine main body 11 starts to rise, and the dancer roller 4 resumes its downward movement, backpooling the excess band produced by the rising of the packing machine main body 11. When the packing machine body 11 reaches its upper limit, the limit switch LS1 is activated and the stopper 2 is turned OFF. During this time, the dancer roller 4 continues to descend, pooling the necessary amount of bands for the next band feeding. When the dancer roller 4 reaches the lowering limit, the dancer roller 4 turns upward by the limit switch LS2, and when the dancer roller 4 reaches the upper limit, the limit switch LS is activated.
1 is activated, the stopper 2 is turned on, and the stopper 1 of the tension arm shutter 62 is turned off, and the belt is in a standby state for feeding the band. The same action is repeated thereafter.

【effect】

As described above, the present invention eliminates the drawbacks of the conventional balance bar method, allows a desired amount of bands to be pooled without damaging the bands, and also allows bands to be fed into the pool box more than necessary. This is a unique band pool device.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention, FIG. 1 is a front view of the first embodiment, and FIGS. 2A and B
3 is a front view of the second embodiment, FIG. 4 is a schematic diagram showing the band feeding, pulling back, and tightening mechanisms in the second embodiment, and FIG. 5 is a sectional view of the main parts of the pool box. FIG. 2 is a schematic diagram showing the inside of the pool box according to the second embodiment. FIGS. 6 to 8 show conventional means, and are an overall perspective view, an exploded perspective view of a pool box, and an exploded perspective view of a pool feed unit, respectively. 1, 2...Stopper, 3...Fixed roller, 4
... Dancer roller, 11 ... Main body, 12 ... Band guide arch, 21 ... Pool box.

Claims (1)

[Claims] 1. A main body equipped with various mechanisms necessary for packing such as band supply, tightening, adhesion, and cutting, and a band attached to one side of this main body and positioned parallel to the side to surround the object to be packed. A band guide arch is provided in which the band is placed, and the band is supplied from the band coil to the band guide arch via the band supply mechanism through a pool box having a band inlet and an outlet and a gap slightly wider than the width of the band. In the automatic packaging machine, a plurality of fixed rollers are supported near one side of the pool box at appropriate intervals, and one of the fixed rollers is mounted near the one side of the pool box in the vicinity of the plurality of fixed rollers. A dancer roller that can freely move back and forth on the same straight line is provided near the other side surface facing the side surface of the pool box, and a detection means is provided for detecting the upper limit and lower limit of the dancer roller. A stopper is provided for fixing the band at the band exit or near the band supply tensioning mechanism, and the dancer roller is lowered to the lower limit during the band tightening and adhesive cutting process, and a detection signal from the lower limit detection means is used to lower the dancer roller to the lower limit. , the dancer roller is raised to the upper limit, and the band fixing operation of the stopper provided at the band entrance of the pool box is released in response to the tightening process end signal, and the band fixing operation of the stopper provided at the band entrance of the pool box or the stopper near the band supply and tightening mechanism is applied. A band pooling device for a packing band in a packing machine, characterized in that the device is configured to perform a band fixing operation.