JP2000296809A - Jammed-band removal method for packing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accomplish easy removal of a jammed part and recovery by turning on a reverse-rotation ejection switch, thereby operating the tightening rollers of a pulling-back-and-tightening device for a specific length of time and pulling back band with a strong force, thereafter, by operating pulling-back rollers for a specific length of time at a high speed, and then by reversely rotating prefield rollers, thereby forcibly ejecting the band in a machine outside the machine. SOLUTION: In case a jam occurs between a band guide arch 3 and supply rollers 11 and 11a, a reverse-rotation ejection switch is turned on to operate the tightening rollers 13 and 13a of a pulling-back-and-tightening device 10 for a specific length of time and pull back band with a strong force. Thereafter pulling-back rollers 12 and 12a are operated at a high speed for a specific length of time and pre-field rollers 6 and 6a are then reversely rotated to forcibly eject the band in a machine outside the machine. According to the structure, in case a jam or other band obstacles occur on the side of an end that is further forward than the supply rollers 11 and 11a, the entire band in the machine is ejected outside the machine by simply operating the ejection switch, the obstacle part is removed at the outside of the machine, and the band can be reloaded. Therefore, recovery is easily accomplished in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing machine provided with a band retraction and tightening roller for removing a band jam or replacing a band in a band guide arch or a band passage between the arch and a pool box. On how to facilitate.

[0002]

2. Description of the Related Art A roller tightening type packing machine has a drawback that a jam (bending in a longitudinal direction or a width direction of a band) is more likely to occur during operation than an arm tightening packing machine. The jam occurs when the movement of the band is hindered by the biting of a foreign object or other external force is applied during supply or withdrawal of the band, or the band becomes wavy or wrinkled in the longitudinal direction of the band as shown in Fig. 4 (a). When the band is pulled back while dropping off from the packaged object when the band is pulled back, the band is folded and overlapped as shown in FIG. The jam band thus formed cannot be supplied or packed, and if jammed in the guide chute, it cannot be pulled back by the high-speed rotating pull-back roller. To remove this, it is inconvenient to open the pool box and manually remove the obstacle band once, remove the obstacle part, and then reload it. It was inefficient work.

[0003]

SUMMARY OF THE INVENTION The present invention provides a feed roller above a pool box by completing a retraction and discharge operation involving a strong tightening step in a short time and once discharging all bands in the device to the outside of the device. It is intended to make it easy and reliable to remove and recover the jam portion generated from the time when the inside of the arch to the inside of the arch, and to be able to use it for, for example, a color changing exchange operation of a colored band.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a forward rotation supply roller, a pull-back tightening device between a pool box and a sealer unit to which a band is supplied by a pre-feed roller that rotates forward and backward, and a band guide through the sealer unit. In a packing machine provided with a guide chute for introducing a band into an arch, when a jam occurs between the band guide arch and the supply roller, the pull-back tightening device is turned on by turning on a reverse rotation discharge switch on a packing machine operation panel. After the tightening roller operates for a predetermined time to perform strong retraction, the retraction roller of the retraction tightening device is operated at high speed for a predetermined time, and if there is a residual band in the arch, the band is also placed in the pool box. After the draw-in, the pre-feed roller is rotated in the reverse direction so that all the bands in the machine are forcibly discharged out of the machine. The retraction tightening device includes a device in which a pair of retraction rollers and a tightening roller are separately provided in proximity to each other, and also allows, for example, a high-speed retraction drive roller to be moved toward and away from a low-speed drive tightening roller having a one-way clutch. It also includes a device that is provided to combine high-speed retraction and low-speed retraction. In short, any device that has both a low-speed strong retraction function and a high-speed retraction function using roller means may be used. Since the band tightening and retraction time after the discharge switch is turned on are each short (about 1 second), even if there is no band in the arch, the loss time of the retraction process can be ignored. Further, the time required to discharge all the bands in the pool box is sufficient if about 4 seconds even when the storage amount is the maximum, and it is completed in a short time that cannot be compared with the conventional work.

[0005]

FIG. 1 shows an apparatus in which a pull-back roller pair is provided separately from a tightening roller. In FIG. 1, 1 is a main body, 2 is a work table, 3 is a band arch, 4 is a band pool box, and a band B unwound from a reel (not shown) has a guide roller 5 and a pre-feed roller 6.
Supplied by M2 is a second driving motor, and 6a is a driven roller. Reference numeral 7 denotes a band guide path made up of two parallel plates, which is provided with a band entrance 8 in the middle of the pool box and reaches the supply rollers 11, 11a. 10 is a band supply
A retraction device, comprising a supply roller 11 and a high-speed retraction roller 12 driven by a first motor M1, and a third motor M
3, a low-speed driving tightening roller 13 is provided. 11a, 1
2a and 13a are respective driven rollers. Electromagnetic solenoids 14, 15, and 16 (indicated by symbols SOL1, SOL2, and SOL3) drive levers L that support the pivots of the driven rollers. Reference numeral 18 denotes a band guide chute close to the retraction roller 12, which is connected to the base block 10a of the supply / retraction device 10.
Reference numeral 19 denotes a band passage between the rollers and the peripheral surface, and has a width of about 1.
5 mm. 20 is a sealer unit, 21 is a clutch brake
Worm input shaft driven via CB, 21a is worm, 2
Reference numeral 2 denotes a worm gear, and 23 denotes a cam shaft, which is supported by a case 24 with a rotation angle detecting disk 25 mounted on the shaft end. The internal configuration of the sealer unit and its functions and operations are well known and have no direct relation to the present invention, so that the description will be omitted.
26 is an operation panel on the table, S is a power button, S1 is a start button, S2 is a band discharge button, and V is a knob for adjusting the tightening amount (setting the tightening time).

[0006] In the above-described apparatus, the tip of the band B from a band reel (not shown) is inserted between the pre-feed rollers 6, 6a via the guide roll 5 and the start switch S1 is pressed, so that the motor M2
Rotates and feeds the band into the guideway 7. The band passes through the entrance 8 along the guide path 7 and reaches the supply rollers 11, 11a. At this time, the supply roller 11 has already been driven and rotated, the driven roller 11a is in a pressure contact state, and the pull-back roller 12,
Since the band between 12a and between the tightening rollers 13 and 13a is open, the band shoots through these gaps and the band passage 19
Arranged in the arch 3 from 18, the driven roller 11a is opened by the output of the not-shown tip detecting means on the sealer unit, the band feed is stopped, and the packing is in a standby state. No. 2
Since the motor M2 continues to rotate, the fed band is bent at the entrance 8 and pushed into the pool box 4 to become a storage band, and when the amount exceeds a set amount, a lever switch (not shown) operates to start the motor M2. Stop. When the packing object P is placed at a predetermined position on the table and the start switch S1 is pressed, the solenoid 15 is excited, and the retraction driven roller 12a is rolled, so that the band is pulled back into the pool box at high speed, The band leaves the arch and binds the package P. Immediately thereafter, the driven roller 13a is pressed against the rotation of the tightening roller 13 and the time set by the tightening amount adjuster V, and after the tightening is performed, the packing is completed by cutting and welding the band.

[0007] In this packing machine, a predetermined operation is performed and the band is cut even if the band falls off the object to be packed and is bent. As a result, the sealer table 20a is bound empty, and a vertical crack is generated in the band connected to the sealer table 20a, or the band passage 19 in the guide chute 18 or the supply roller 11 is formed.
May leave a jam inside. The empty tying band can be removed by other means, and when the damaged portion or the jammed portion is accumulated in the band passage 9 on the table surface or the sealer table, it can be removed manually, but it can be removed in the band passage inside the machine. In such a case, the band cannot be advanced or retracted with normal force, so that the automatic feeding of the band after the band is cut is not performed. In other words, since the band tip does not reach the band tip detecting means and the packing operation becomes impossible, it is possible to know the occurrence of a jam inside the machine which cannot be visually recognized. When the ejection button S2 is turned on in this state, the operation shown in the flow of FIG. 8 is performed, and all bands are ejected outside the machine. When the color of the band is exchanged, it is a matter of course that the band is normally arranged in the arch.

FIG. 9 shows another example of the band supply / retraction device 10.
This device omits the pull-back driven roller 12a in the above-described device and enables the pull-back driving roller 12 to be able to contact and separate from the tightening roller 13.The tightening roller 13 is driven at a low speed via a one-way clutch (not shown). When the band is pulled back driven by the motor M3, the retraction roller 12 rolls in contact with the tightening roller 13 by a drive mechanism (not shown) to perform high-speed retraction, and when tightening, the retraction roller 12 separates and the driven pressure contact roller 13a rolls in, and Strong tightening is performed by the tightening roller 13. Of course, the jam band generated by this device can be discharged out of the machine by the same operation as described above.

[0009]

According to the present invention, when a jam or other band injury occurs on the tip side of the band supply roller, the jam portion is moved below the tightening roller by utilizing the strong tightening force of the tightening roller only by operating the discharge switch. At the same time as the band inside the arch is driven, regardless of the presence or absence of the band inside the arch, pulls the band inside the arch into the pool box, and then reverses the pre-feed roller continuously, so that all the bands inside the machine Anyone can recover in a short time because it is only discharged outside and the injured part is removed and reloaded outside the machine.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a packing machine.

FIG. 2 is an enlarged view of a main part of the supply / retraction device.

FIG. 3 is a schematic top view showing a drive system.

4A and 4B are diagrams showing a jam state.

FIG. 5 is an enlarged view showing a jam occurrence state in a band passage and a contact / separation relationship of rollers.

FIG. 6 is an enlarged view showing the contact / separation relationship of each roller when the jam roller is pulled back by the tightening roller.

FIG. 7 is an overall view showing a state after the band is discharged.

FIG. 8 is a flowchart showing the operation of each motor and each solenoid when the band is ejected.

FIG. 9 is an enlarged view of a main part showing another example of the band supply / retraction device.

[Explanation of symbols]

 2 Work table 3 Band arch 4 Pool box 5 Guide roller 6,6a Pre-feed roller M1 First motor (sealer motor) M2 Second motor (pre-feed motor) M3 Third motor (tightening motor) 7 Band guideway 8 Band entrance / exit 9 Band passage 10 Supply / retraction device 10a Base block 11,11a Supply roller 12,12a Retraction roller 13,13a Tightening roller 14,15,16 Electromagnetic solenoid 18 Guide chute 19 Band guide groove 20 Sealer unit 26 Operation panel S1 start Button S2 Eject button

Claims (1)

[Claims] 1. A forward rotation supply roller and a pull-back tightening device between a pool box and a sealer unit to which a band is supplied by a pre-feed roller that rotates forward and backward, and a guide for introducing a band into a band guide arch through the sealer unit. In a packing machine provided with a chute, when a jam occurs between the band guide arch and the supply roller, the tightening roller of the retraction tightening device is operated for a predetermined time by turning on a reverse discharge switch on the operation panel of the packing machine. After the strong pull-back, the pull-back roller of the pull-back tightening device is operated at a high speed for a predetermined time, and if there is any remaining band in the arch, this band is also drawn into the pool box before the pre-feed roller. The jam band removal method characterized in that all bands in the machine are forcibly ejected out of the machine by reversing the band.