JP2504094Y2 - Band feeder for packing machine - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a band supply device in an automatic packing machine in which a band guide arch is attached to the body of the packing machine. The defective band tip is cut and discharged outside the body, and the inside of the band guide arch on the body of the packing machine is again cut. The present invention relates to a band supply device that reliably travels to reach a predetermined stop position on the lower surface of a slide table.

[Prior art]

The band supplying / tightening device in the conventional packing machine is the fifth one.
As shown in FIGS. (A) to (C), one of the pair of rollers 24 and 25 that sandwiches and feeds the band and touches it as one idler roller that slides in contact with the drive roller 24 through the band and is driven to rotate. The roller 33 is eccentrically supported by the eccentric shaft 26 projecting from one end of the main shaft 29 on the main shaft 29, and the weight of the weight 27 inserted into one end of the adjuster 23 fixed to the other end of the main shaft 29 or the weight of the adjuster 23. The eccentric shaft 26 of the touch roller 25 is rotated in an arc by rotating the main shaft 29 by the tension of a spring (not shown) that urges one end downward in FIG. 5, and is connected to a drive mechanism (not shown). Other drive roller
It presses against the 24 and clamps the band to obtain the frictional force necessary to feed the band. In this way, the pair of rollers 24 and 25 clamps the band only by the weight of the weight 27, the fixed position of the weight 27 on the adjuster 3, or the reaction force of the spring (not shown), and the pair of rollers 24 and 25 is formed. Rotate the band in the forward direction and feed the band into the band guide arch outside the packing machine body. Then, the forward rotation time is adjusted by a timer set slightly longer than the time for the band tip to reach the lower side of the slide table 28, or a slide for detecting the arrival of the band tip provided under the slide table 28. With the table switch
When the tip of the band reaches a predetermined position for starting pulling back, that is, above the left press, the right press, etc., or at the end of the time to reach it, actuate a braking mechanism such as an electromagnetic brake,
It is configured to stop the rotation of the drive roller 24.
Although the band has already reached the lower side of the slide table 28 at the time of supplying the band, a signal indicating that the timer is set up or the timer is up or the slide provided under the slide table 28 is set. The drive roller 24 will continue to rotate within a short time until the rotation of the drive roller 24 is stopped by the braking mechanism operated by the signal from the table switch. 25 stops, and the weight of the weight 27 applied to the adjuster 23 so that the drive roller 24 slips (idles) with respect to the band, the position of the weight 27 on the adjuster 23, or the tension of a spring (not shown) causes the touch roller 25 to move. The pressing force on the drive roller 24 is adjusted (Jitsuko Sho 53-44635).

[Problems to be solved by the device]

In the band feeder of the conventional packing machine, if the tip of the band is caught in the band guide arch during band feeding, not only the one that adjusts the band feeding time by the timer but also the slide table switch. Even if the band supply is stopped by the signal of
Until the time is up, the pair of rollers 24 and 25 continue to feed the band with the band tip caught.Therefore, the band tends to bend at the tip of the band. Defects such as bending appear significantly. Therefore, there is a problem that it is necessary to stop the machine once and manually pull back the band to fix the bent end of the band, or to cut the end of the band and re-feed the band into the band guide arch. there were. The present invention solves the above problems of the prior art, and particularly when the band stops in the arch, the band is automatically pulled back to cut the band end, and the cut and separated band is removed from the bandway. It is an object of the present invention to provide a feeding device that can feed the band whose tip portion is new after being discharged into the band guide arch again and feed the band under the slide table.

[Means for Solving the Problems]

In order to achieve the above object, in the band supply device of the present invention, a packing machine main body 60 having a control band 10 comprising a packing band supply including a pair of forward and reverse rollers, a tightening mechanism, a welding mechanism, and a cutting mechanism, By attaching the band guide arch 30 formed by facing both ends of the welding and cutting mechanism of the series of bandways 31 forming a band passage for arranging the band in a loop around the object to be packed, by the band supply mechanism. A timer which is provided at the time of starting the forward rotation of the roller, is provided with a band arrival detecting means 17 for detecting that the tip of the band that has been fed and circulated in the band passage of the band guide arch 30 has reached the welding and cutting mechanism. In the automatic packing machine provided with, the bandway located in the front of the welding and cutting mechanism in the band supply direction is divided from the series of bandways 31, and the division is performed. Together for supporting the band supply end of Ndowei 32, solenoid allowed rotating the band feed direction front end side of the divided band-way 32 in the packaging machine downwardly
Provide a drive such as 37. Then, a sensor 44 for detecting the absence of the band of the divided band way 32 is provided in the vicinity of the divided part, and the band arrival detection means 17 sets the band fed by the normal rotation of the roller in the timer. When not detected within the time, the band is pulled back by the reverse rotation of the roller, and the band pulled back is used by the sensor 44.
After the passage, the sensor 44 detects the absence of a band, and stops in the divided bandway 32, the cutting mechanism cuts the band tip by the operation of the control, and detects the completion of the band cutting. The signal causes the drive device such as the solenoid 37 to rotate the front end side of the divided bandway in the band supply direction downward. Further, a pair of reversely rotating rollers of the tightening mechanism is driven by a driving roller 71 which is rotated by a rotation driving means, and a touch roller 72 which is slidably brought into pressure contact with and separated from the driving roller 71 and driven to rotate.
The touch roller when the band arrival detecting means 17 does not detect a band within the set time of the timer.
A solenoid 89 for pressing the driving roller 71 against the driving roller 71 and for separating the touch roller 72 from the driving roller 71 by a detection signal of the sensor that detects the absence of the band.
A drive mechanism such as can be provided. Further, a pair of out rollers 50, 51 are provided, which face the opening on the front end side in the band supply direction of the divided band way 32 rotated downward by the driving device and are driven from the out rollers 50, 51. A shooter guide 53 may be provided for discharging the cut and separated band to be fed out of the body of the packing machine.

[Action]

In the band supply device configured as described above, first, the pair of rollers of the band supply mechanism of the control 10 is normally rotated, and the band is fed into the band passage in the band guide arch 30. The band tip reaches the band arrival detection means 17. However, if the band stops in the band guide arch 30 due to bending of the tip of the band or the like, the band arrival detection means 17 does not detect even when the time set by the timer has elapsed. In this case, the pair of rollers reversely pulls back the band in the band guiding arch 30, and when the pulled back band tip passes the sensor 44, the sensor 44 detects the absence of the band, and the band is detected by this detection signal. The tip portion stops within the split bandway 32. Then control 10
Starts the operation of the normal packing process, the tip part of the band is cut by the cutting mechanism of the control, and then the driving device such as the solenoid 37 rotates the front end side of the split bandway 32 in the band feeding direction downward to split the band. The band that has been cut and separated in the bandway 32 falls and is discharged downward. Next, after the driving device such as the solenoid 37 raises the divided bandway 32, and after returning both ends of the band passage of the divided bandway 32 to the band passage of another bandway 31, The pair of rollers is rotated in the forward direction, the bent tip portion is cut and removed, and the band having a new band tip portion is fed into the band guide arch 30. Further, the band in the band guide arch is pulled back by the reverse rotation of the roller, and the band absence detection signal of the sensor 44 when the tip of the band passes the sensor 44 causes the drive mechanism such as the solenoid 89 to operate to press the band. When the detachable touch roller 72 is separated from the reversely rotating drive roller 71, the reaction of stopping the band becomes faster, and the band surely stops in the split band way 32. Further, the tip of the cut and separated band slides downward in the divided bandway 32 and reaches between the already rotated out rollers 50 and 51, and the band is shaken by the out rollers 50 and 51. Packing machine body 60 through 53
It is discharged outside.

【Example】

An embodiment will be described with reference to the drawings, omitting the same parts as in the prior art, and FIG. 3 shows a so-called standard type packing machine, in which a band for mounting a packing band coil on a side wall of a packing machine body 60. A reel 61 is provided, and a control unit 10 including a band supply, a tightening mechanism, a welding mechanism, and a cutting mechanism is provided inside the main body 60, and a band passage for allowing the band to be arranged in a loop around the object to be packed is formed in the main body 60. A band guide arch 30 is provided with both ends of a series of band ways 31 facing the welding and cutting mechanism of the control 10. FIG. 4 shows the control 10, and shows a mechanism for gripping the front end side and the supply end side of the band and for welding and cutting the band overlapping portion, and each mechanism is mounted on the machine frame 20. However, the heater for melting the band of the overlapping portion is not shown. The machine frame 20 has vertical machine frames 21 and 22 which are erected substantially parallel to each other on a substrate (not shown).
The cam shaft 15 is supported by a rotary drive motor (not shown) provided outside the vertical machine frame 21 on the substrate of the machine frame 20 via a speed reducer. As is well known, a plurality of cams are axially mounted on the cam shaft 15 between the vertical machine frames 21 and 22, and the band guide 16, the slide table frame 18, the heater crank 19, and each press block 12 described later. ~ 14 is the camshaft 15
By the rotation of the above, it is slid or moved up and down in accordance with the packing process, so that the above-mentioned grasping of the band front end side and the supply end side and the welding and cutting of the band overlapping portion are performed. The slide table frame 18 is rotatably supported by the cam of the cam shaft 15 and is axially supported between the vertical machine frames 21 and 22, and the flat table-shaped slide table 11 of the present invention has a tip projection at its upper end. It is fixed so as to face above each press block described later. Further, a band guide 16 which is slidable by the cam of the cam shaft 15 is provided immediately below the slide table 11, and an upper part of the band guide 16 is fed by a pair of rollers of the band supply mechanism. , The band guide arch 30
A band arrival detecting means 17 including a limit switch and a striker for detecting that the tip of the band has reached below the slide table 11 is provided around the band passage. A heater crank 19 for inserting and removing a heated heater is provided on the cam of the cam shaft 15 so as to be slidable between the bands of the band overlapping portion formed by the band guide 16. 12 to 14 are press blocks, which are the slide tables 11
Under the tip projection of the
It is provided so as to be movable up and down by rotation of 15, and 12 is a right-pressing press block that holds the band tip side with the slide table 11. Reference numeral 13 denotes a middle press block, which presses the band overlapping portion melted by a heated heater with the slide table 11 and cuts the band supply end with the right pressing press block 12. Reference numeral 14 denotes a left pressing press block, which is a member for winding the object to be packed, pulling back with a reverse rotation roller, and gripping the supply end side of the band tightened with the slide table 11. The band guide arch 30 is provided vertically downward on the upper surface of the body 60 of the packing machine so as to extend downward in a U shape, and the inside of the bandway 31 forms a band passage and the entire length of the bandway 31 in the longitudinal direction. The upper surface is covered via a band passage allowance gap, and it is equipped with a plurality of openable and closable flaps that are urged by the material itself or a spring so that the band is closed when pulling back to open. Cage,
Both ends of this series of bandways 31 are the control
It faces 10 welding and cutting mechanisms. Then, a bandway located in front of the welding and cutting mechanism in the band supply direction is divided from the series of bandways 31 to form a divided bandway 32. As shown in FIGS. 1A to 1C, the divided bandway 32 is provided with a flap 39 that extends to the entire length in the longitudinal direction of the divided bandway 32 and covers the upper surface direction with a band passage gap. For the flap 39, a hinge bracket 40 fixed to the flap 39 is fitted to a U-shaped bracket 33 fixed to a substantially central lower surface of the divided bandway 32, and the bracket is attached.
The pin 41 is inserted into the holes formed in the 33 and the hinge bracket 40, respectively, and the pin 41 is urged to be openable and closable through a spring so as to be normally closed. The rear end of the band passage of the divided bandway 32 in the band supply direction is located so as to communicate with the band passage of the band guide 16, and the front end of the band supply direction in the band passage of another bandway 31. It is provided to communicate. The band passage in the band guide arch 30 is
Not limited to the one formed by the above-mentioned bandway 31 and a plurality of flaps, a series of known arch bandways having a U-shaped cross section, that is, the longitudinal opening surface of the U-shaped cross section is covered by a plate surface such as an arch gover. It may be formed as a lid, and the band passage of the divided bandway 32 may be formed in the same manner. The divided bandway 32 is
A bearing block 34 having pin holes formed therein is fixedly provided on the lower surface of the band supply end side, and one end of a bearing block 34 fixed to the vertical machine frame 21 via a bolt is attached to the pin hole of the bearing block 34. The pin 36 to be fixed is inserted and is rotatably supported in the vertical direction. Further, a solenoid 37, which is a drive device, is provided below the front end side in the band supply direction of the divided bandway 32, and the rod tip of this solenoid 37 is inserted into an engaging member 38 provided on the lower surface of the divided bandway 32 through a long hole. Are engaged. The engaging member 38 has an L-shaped cross section, and one piece of the engaging member 38 is attached to the band supply front side wall surface of the bracket 33 fixed to the substantially central lower surface of the divided bandway 32, and the other piece of the engaging member 38. Is provided with a long hole, and the rod end of the solenoid 37 is engaged with the long hole through a pin. The solenoid 37 is mounted on a mounting plate 48 installed on the packing machine main body 60. Further, the front end in the band supply direction of the divided bandway 32 is rotated by a motor 52 into an opening in the front end side in the band supply direction at a position where the front end in the band supply direction is rotated downward by the solenoid 37 as a drive device and stopped. LA 50,
Slidingly presses against the out roller 50 via the band B,
A band to be described later, which is provided so that a sliding contact surface with the out-rotating roller 51 that is rotated and faces, is fed by the out-rollers 50, 51, that is, a band cut and separated in the split band way 32 is provided outside the packing machine main body. Guide to discharge to
53 are provided in front of or behind the out rollers 50, 51. As shown in FIG. 1 (B), the out roller 50 is fixed to the tip of the rotating rod of the motor 52 mounted on the mount 54 fixed to the main body 60 with a screw through a key, and the out touch roller 51 is the mount. A block 56 rotatably attached to a block 54 via a bolt 55 is attached to a shaft 57 projecting parallel to the rotation axis of the out roller 50 at the tip side of the block 56, and the out touch roller 51 serves as the out roller. It is constantly urged by the spring 58 in the direction of pressing against 50. Then, in order to adjust the distance between the sliding contact surfaces of the out roller 50 and the out touch roller 51, the block 56 in the direction in which the out touch roller 51 rotates toward the out roller 50 side as shown in FIG. 1 (A). A stopper 59 that comes into contact with the side surface of the is provided so as to be adjustable. Below the control 10 in the main body 60 of the packing machine, a pool box 62 is provided as shown in FIGS. 2 (A) and 2 (B). It is formed in a box shape so as to face each other with a slightly larger gap, and is a storage part for pre-storing the band in order to supply the band into the band guide arch as quickly as possible. This pool box 62 has band reels
A band inlet for drawing in the band drawn out from 61 and a band outlet for sending out the band stored in the pool box 62 to the control 10 are provided. A pool feed roller that is driven to rotate by a motor (not shown) is provided at the band entrance,
A known pool amount control device for automatically storing a set amount of bands in 62 is provided. Inside the band outlet of the pool box 62, as shown in FIGS. 2A and 2B, a pair of rollers, that is, a driving roller 71 rotated by a motor 73 as a rotation driving means.
And a touch roller 72 which is slidably contacted with and separated from the drive roller 71 and is driven to rotate. In the present embodiment, the pair of rollers 71 and 72 are connected to the divided bandway 3
It has a function of supplying the band to the inside of 2 and pulling back the band in the divided band way 32. The drive roller 71 is shown in FIGS. 2A and 2B.
The base plate 74 fixed to the rear body 60 of the plate 64 on the rear side of the pool box 62 is fixed, and the bearing bracket 75 is fixed to the base plate 74 via bolts, and the bearing provided on the bearing bracket 75 is fixed. Bearing mounted in hole
The tip of the shaft 77, which is pivotally supported via 76,
4 is projected through the hole formed in the pool box 62, a roller 71 is attached to the tip of the shaft 77 so as to face the pool box 62, and a pulley 78 is fixed to the rear end of the shaft 77. ing. Then, the motor 73 is attached to the base plate 79 separately fixed to the packing machine main body 60 via the brake 81, and the pulley 78 is fixed to the tip of the rotating rod of the motor 73. The rotational force of the motor 73 is the pulley 78 and the V belt 80. It is provided so as to be transmitted to a pulley 78 provided on the shaft 77 via. As for the touch roller 72, as shown in FIGS. 2 (A) and 2 (C), the shaft 82 is attached to the base plate 74.
Project toward the plate 64 of the pool box 62, and a support 84 is provided at the tip of the shaft 82 via a metal bush 83 of the bearing.
The shaft 86 is supported at the lower end of the support body 84, and the shaft 86 is provided at the upper end of the support body 84 so that the tip of the shaft 86 projects into the pool box 62 through the hole formed in the plate member 64. A touch roller 72 is rotatably mounted via a collar 85 so as to face the inside of the pool box 62, and the touch roller 72 is provided at a position where it abuts on the drive roller 71. In this embodiment, two ball bearings are provided in parallel as the touch roller 72. Further, in the direction opposite to the direction of rotation of the support 84 with respect to the drive roller 71, a hook 87 having a plurality of protrusions parallel to the L-shaped or L-shaped tip bending piece is provided in a protruding manner. The bent piece at the end of the L-shape projects in the same direction as the hook 92 described later. Further, a bracket 88 having an L-shaped cross section is fixedly mounted on the same surface as the mounting surface of the shaft 82 of the base plate 74, and a solenoid 89 which is a driving device is provided on the other side of the bracket 88 in the direction of the support body 84. An angle-type bracket 90 is screwed to the rod tip of the solenoid 89 via a screw, and a protrusion 91 is provided at the tip of the bracket 90.
The projection 91 is provided on the side surface of the support body 84 in the direction of rotation with respect to the drive roller 71, and is provided so as to abut at a position above the shaft 82, and the bracket 90 on the side opposite to the mounting surface of the projection 91 is provided. A hook 92 is provided on the surface (in this embodiment, a bolt is inserted into a hole formed at the tip of the bracket 90 to serve as both the projection 91 and the hook 92), and the projection of the hook 92 and the hook 87. The projection 93 on the support 84
It is urged so that it abuts 91. A guide plate 94 for guiding the band between the rollers 71 and 72 to the band outlet is provided between the sliding contact surface between the drive roller 71 and the touch roller 72 and the band outlet of the pool box 62. In this embodiment, the band guide arch 30 is automatically released when the tip of the band taken out from the band reel 61 is inserted between the pair of pool feed rollers (not shown).
After reaching the band arrival detection means 17 under the slide table 28 by circulating, the known band guide 95 that automatically forms a band guide portion is provided from within the pool box. One end faces between the drive roller 71 and the touch roller 72, and the other end faces between the pair of pool feed rollers. Although the pair of rollers 71 and 72 are provided near the exit of the pool box 62 in this embodiment, a pair of rollers of a conventional band supply / tightening mechanism can be used. Further, the pair of rollers 71, 72 is provided separately from the conventional band supply tightening mechanism, and these rollers 71, 72 are
The band pulled out from the band reel can also be used as a pre-feed roller for preliminary feeding into the control 10. Next, the operation of the above embodiment will be described. First, in the band set at the start of use of the packing machine, an arbitrary amount of band is pulled out from the band reel 61 around which the band is wound, and its tip is inserted between the pair of pool feed rollers (not shown). Next, when the forward rotation switch for starting the band supply is activated, the pool feed roller rotates and the motor 73 rotates in the forward direction.
The rotating force of 73 causes the drive roller 71 to rotate normally via the V-belt 80.
That is, the solenoid 89 is actuated at the same time as rotating in the band supply direction, and the projection 91 at the rod tip of the solenoid 89
Moves in the direction of the drive roller 71. Then, the support body urged so as to come into contact with the projection 91 via the spring 93.
84 rotates in the direction of the drive roller 71, and the outer circumference of the touch roller 72 provided at the upper end of the support body 84 contacts the drive roller 71.
At this time, since the protrusion 91 at the rod tip of the solenoid 89 is provided so as to move more than the distance between the drive rollers 71 and 72, after the touch roller 72 comes into contact with the drive roller 71,
The protrusion 91 is separated from the support 84, and the touch roller 72 is
The driving roller 71 is pressed by 93. This pressing force causes the band to be fed to the band guide arch 30 and also pulled back from the band guide arch 30 because the moving distance of the protrusion 91 after the touch roller 72 contacts the drive roller 71 is small. It is possible to make the pressure contact force small enough to escape. This pressure contact force changes the strength of the spring 93, or
It can be adjusted by changing the position where 93 is hooked on the protrusion of the hook 87. Then, the tip of the band fed by the pool feed roller rotated by the operation of the forward rotation switch passes through the inside of the band guide 95, and the rollers 71, 7 already rotated.
It reaches between 2 and the control is performed by the rollers 71 and 72.
The band passing path of the band guide arch 30 is circulated through the welding and cutting mechanism 10 and the striker of the band arrival detecting means 17 provided below the slide table 11 is operated. This striker actuates the limit switch of the band arrival detecting means 17, and the forward rotation of the motor 73 is stopped by the brake 81 by the detection signal of the band arrival, and the driving roller 71
Stops. At this time, the band tip is the band arrival detection means
After reaching 17, even if some rotation inertia occurs until the rotation of the drive roller 71 is completely stopped by the brake 81, the touch contact force of the touch roller 72 is small as described above, so that the influence on the band can be reduced. it can. Then, the known band guide 95 is automatically released from the pool box by the detection signal of the band arrival detection means 17, and then the band of the band reel 61 is a known pool supply control device not shown by the pool feed roller. The set amount is loaded into the pool box by. The body of the packing machine 60 thus ready for packing work
When the object to be packed is placed on the top and the start switch for starting the packing process is operated, the rotary drive motor of the control 10 is rotated, and the cam shaft 15 is rotated through the speed reducer.
The rotation of the cam shaft 15 pushes the right presser press block 12 upward, and the tip end side of the right presser press block 12 and the slide table 1 are gripped on the band front end side. Then, the motor 73 reversely rotates to reversely rotate the drive roller 71 via the V-belt 80, pulls back the band from the band supply end side and winds the band around the object to be packed, and then installs it on the tip of a not-shown tightening roller or arm. The jaw is used to grip the band and swing it backward in the band supply direction to tighten the band. The band is tightened by a band tightening mechanism such as a tension arm.
When the set tightening force is reached, the cam shaft will
15 rotates, the left presser press block 14 is pushed upward, and the band on the supply end side is provided with a substantially triangular groove 26 provided on the lower surface of the slide table 11 and a substantially triangular left presser to be fitted into this groove. It is gripped by the tip of the press block 14. Next, the rotation of the cam shaft 15 causes the band guide 16 to swing and retreat, the heater crank 19 is inserted between the bands of the band overlapping portion formed by a spring (not shown), and the vertical movement of the middle press block 13 causes both bands to move. The facing surface of is melted. Further, when the heater crank 19 is retracted by the rotation of the cam shaft 15 and the heater is pulled out from the band overlapping portion, the middle press block 13 rises to cut the band between the right press press block 12 and the middle press block 13. Almost at the same time, the melt surface of the band overlapping portion is pressed between the slide table 11 and the middle press block 13 to bond the band overlapping portion. Then, as the cam shaft 15 rotates, each press block 12-14 descends, returns to the original position, the slide table frame 18 swings, and the slide table 11 retracts, so that the band is released from the slide table 11, Take out the packed items. Immediately thereafter, the band guide 16 and the slide table frame 18 return to their original positions, and then the band in the pool box moves to the pair of rollers 7
It is sent to the band guide arch by 1,72. If the fed band tip stops due to a problem such as being caught in the band guide arch 30, the band arrival detection means 17 detects the arrival of the band even if the set time of the timer operating at the same time as the band supply elapses. Therefore, the motor 73 is switched to the reverse rotation and the band in the band guide arch 30 is pulled back. Then, when the retracted band tip passes the sensor 44, the sensor 44 detects the absence of the band, and the detection signal detects the solenoid.
The projection 91 at the rod tip of 89 is a support 84 which is formed on the touch roller.
72 operates so as to separate from the drive roller 71. When the touch roller 72 separates from the drive roller 71, the pulled-back band immediately stops in the band passage of the divided band way 32 even if there is some inertia when the band runs. At the same time, the detection signal indicating the absence of the band from the sensor 44 causes the rotation drive motor of the control 10 to rotate and the cam shaft 15 to rotate via the reduction gear. That is, the rotation operation of the cam shaft 15 in the normal packing process described above is performed, and the band tip portion stopped in the divided bandway 32 is cut between the right pressing press block 12 and the middle pressing block 13. Then, when the cam shaft 15 returns to the original position, the solenoid 37 is actuated and the front end side of the divided bandway 32 in the band supply direction is rotated downward to move the divided bandway.
Stopper with lower end of 32 hinge brackets 40
Abut 42 and stop. Then, the tip end portion of the band cut and separated in the band passage of the divided bandway 32 slides the band passage forward in the band feeding direction to reach between the out rollers 50 and 51 and the operation of the solenoid 37 is already performed. At the same time, the packing machine main body 60 is interposed between the out rollers 50 and 51, which are rotationally driven by the motor 52, via the shooter guide 53.
It is discharged outside. In addition, this out roller 50, 51 and shooter guide 5
If there is not 3, the band separated by cutting falls downward from the front end in the band feeding direction of the divided bandway 32,
Is discharged. After the divided bandway 32 rotates downward for the time set by the timer, the solenoid 37 pushes up the divided bandway 32 upward so that both ends of the band passage of the divided bandway 32 have the other bandways 31 of the band guide arch 30. It returns to the state of communicating with the band passage. At the same time, the motor 73 rotates in the normal direction to rotate the drive roller 71 in the normal direction, the solenoid 89 operates, the touch roller 72 is pressed against the drive roller 71, the bent tip portion is cut and removed, and the band tip portion is renewed. Is fed into the band guide arch 30, and when the tip of the band reaches the band arrival detecting means 17, the rotation of the drive roller 71 is stopped. In the above, the embodiment in which the band supply device of the present invention is attached to the standard type packing machine has been described.However, the device of the present invention can be applied to another packing machine, for example, the control 10 in the packing machine main body 60 sideways. A horizontal packing machine equipped with a horizontal U-shaped band guide arch 30 in the main body 60 and the control 10 in the main body 60 are arranged horizontally and the horizontal U-shaped band guide arch 30 is installed in the main body 60. It can also be installed in a horizontal packaging machine equipped with it. When rotating the front end side of the divided bandway 32 in the band supply direction downward, in the case of a horizontal packing machine, the band guide arch 30 is arranged so that the divided bandway 32 is located below the control 10. By slightly removing the front end side of the divided bandway 32 in the band supply direction from the other band passage of the bandway 31 in the direction opposite to the center direction of the band guide arch,
The band cut and separated in the divided band way 32 falls downward. And in the case of a horizontal packing machine, since the split bandways 32 are positioned in the horizontal direction, the band feed direction front end side of the split bandways 32 is rotated in the direction opposite to the arch center direction like the standard type packing machine. Instead, it may be rotated in a direction perpendicular to the plane toward the center of the arch and downward.

[Effect of device]

Since the present invention is configured as described above,
The following effects are achieved. The bandway located in front of the band feeding direction of the control welding and cutting mechanism built into the packing machine body is divided from a series of bandways in the band guide arch, and the band feeding end side of this divided bandway is pivotally supported. With
A drive device for rotating the front end side of the divided bandway in the band supply direction to the lower side of the packing machine is provided, and a sensor for detecting the absence of the band of the divided bandway is provided at a position near the divided part of the divided bandway. When the arrival detection means does not detect the band fed by the normal rotation of the roller within the set time of the timer, the band is pulled back by the reverse rotation of the roller, and the band pulled back passes through the sensor and is It stops in the divided bandway by the detection signal of the sensor that has detected the absence, the band tip is cut by the cutting mechanism by the operation of the control, and the drive device is made to operate by the detection signal that detects the completion of the band cutting. Since the front end side of the split bandway in the band supply direction is rotated downward, the tip of the band is scratched in the middle of the band guide arch. Even when stopped, the band is automatically pulled back, the tip of the band is cut and the cut and separated band is discharged from the bandway, and then the bent tip is cut and removed to renew the band tip. It was possible to provide a band feeding device that can feed the band into the band guiding arch again and circulate and feed under the slide table. Further, the pair of reversing rollers of the tightening mechanism is composed of a driving roller rotated by a rotation driving means and a touch roller which is slidably pressed and separated from the driving roller and driven to rotate, and the band arrival detecting means is the timer. When the band is not detected within the set time of, the touch roller is brought into pressure contact with the drive roller, and a drive mechanism is provided for separating the touch roller from the drive roller by a detection signal of the sensor that detects the absence of the band. Therefore, the reaction of stopping the band is fast after the retracted band tip passes through the sensor, and the band tip portion can be stopped accurately in the divided bandways. Further, a pair of out rollers that are driven to rotate are provided facing the opening of the split bandway which is rotated downward by the drive device toward the front end side in the band supply direction, and the cutting and separating device is fed from the out rollers. Since the shooter guide for discharging the separated band to the outside of the packing machine main body is provided, the band cut and separated in the divided bandways can be reliably discharged to a predetermined place.

[Brief description of drawings]

FIG. 1 (A) is a cross-sectional view of the main part of the device of the present invention taken along the center line of the bandwidth, FIG. 1 (B) is a plan view of the device of the present invention, and FIG. 2A is a sectional view taken along the center line of the band passing path of the drive roller portion, and FIG. 2B is a sectional view taken along line BB of FIG. 2A. 2C is a sectional view taken along the line CC of FIG. 2A, FIG. 3D is a sectional view taken along the line DD of FIG. 2A, FIG. 3 is a perspective view of the entire packing machine, and FIG. Is a perspective view, and FIGS. 5 (A) to 5 (C) are views showing a conventional device. 10 …… Control, 17 …… Band arrival detection means, 30…
… Band guide arch, 31 …… Bandway, 32 …… Divided bandway, 37 …… Solenoid, 44 …… Sensor, 50…
Outer roller, 51 Outtouch roller, 53 Shooter guide, 60 body, 71 Drive roller, 72 Touch roller, 89 Solenoid

Claims (3)

(57) [Scope of utility model registration request] 1. A band for arranging the band in a loop shape around an object to be packed in a packing machine main body having a control of a packing band supply including a pair of forward and reverse rollers, a tightening mechanism, a welding mechanism, and a cutting mechanism. A band guide arch having both ends of a series of bandways forming a passage facing the welding and cutting mechanism is attached, and is fed by the band supply mechanism to circulate in the band passage of the band guide arch. In an automatic packing machine provided with a band arrival detection means for detecting that the end of the band has reached the welding and cutting mechanism, and a band supply direction of the welding and cutting mechanism provided with a timer that operates at the start of forward rotation of the roller. A bandway located in front is divided from the series of bandways, and the band supply end side of this divided bandway is pivotally supported,
A drive device for rotating the front end side of the divided bandway in the band supply direction to the lower side of the packing machine is provided, and a sensor for detecting the absence of the band of the divided bandway is provided at a position near the divided part of the divided bandway. When the arrival detection means does not detect the band fed by the normal rotation of the roller within the set time of the timer, the band is pulled back by the reverse rotation of the roller, and the band pulled back passes through the sensor and is It stops in the divided bandway by the detection signal of the sensor that has detected the absence, the band tip is cut by the cutting mechanism by the operation of the control, and the drive device is made to operate by the detection signal that detects the completion of the band cutting. A band supply device for a packing machine, wherein a front end side of the divided bandway in the band supply direction is rotated downward. 2. A pair of reversing rollers of the tightening mechanism comprises a driving roller rotated by a rotation driving means and a touch roller which is slidably pressed and separated from the driving roller and driven to rotate, and the band arrival detecting means. When the band is not detected within the set time of the timer, the touch roller is pressed against the drive roller, and the touch roller is separated from the drive roller by the detection signal of the sensor that detects the absence of the band. The band supply device for a packing machine according to claim 1, further comprising: 3. A pair of out rollers that are driven to rotate and face the opening on the front end side in the band supply direction of the divided bandways that are rotated downward by the drive device and are fed from the out rollers. The band supply device for a packing machine according to claim 1, further comprising a shooter guide for discharging the cut and separated band to the outside of the packing machine body.