JP2001199408A - Automatic discharging apparatus for tip portion in automatic packing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic discharging apparatus for a band tip portion in an automatic packing machine which automatically returns the band tip portion to cut a defective portion when the band tip portion is hooked in the middle of a band guide arch, and automatically and rapidly discharge the band tip portion outside a packing machine with less parts number. SOLUTION: A split passage 37 is inclined, a band feeding means 30 is driven again, the band tip portion is fed to the inclined split passage 37 side by the driving force, and further guided to a discharge roller 61 side provided on the downstream side of the split passage 37, the feed to this discharge roller 61 is detected by a sensor 6, the drive of the band feeding means 30 is stopped by this detection signal, a rear end portion of a band is cut by a cutting device 35, and the band tip portion is discharged outside the packing machine by the discharge roller 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic packing machine, in which, in the process of supplying a packing band into a band guide arch, if the band tip stops inside the band guide arch, the band tip becomes defective. The present invention relates to an automatic discharging device at the tip of a band in an automatic packing machine that cuts a sheet and automatically discharges the outside of the packing machine.

[0002]

2. Description of the Related Art For example, in a fully automatic banding automatic packing machine 10, as shown in FIG. 6, a band is wound around an object to be packed in a loop on an upper part of a packing machine body 1. A band guide arch 2 is provided. If a band is to be supplied directly from the band reel 3 to such a band guide arch 2, a large amount of force is required for the supply. A necessary amount of band is stored in the pool box 4 in advance, and the pool box 4
The band is supplied into the band guide arch 2 via the. Normally, the band is supplied from the pool box 4 to the band guide arch 2 by band supply means such as rollers provided in the control unit 5.

[0003] By the way, such a conventional automatic packing machine 1
In the case of 0, when banding is performed using a narrow, soft band with a weak waist, or when the band used is twisted, the band is sent from the pool box 4 as indicated by an arrow. The band is caught in the band guide arch 2, and as a result, the predetermined position S
May not be reached.

In such a case, the band guide arch 2
The band end sent to the band must be pulled back once, and the defective portion of the band end that has been pulled back must be cut off with scissors or the like, and then the band end must be set again on a predetermined running path. In this case, it is troublesome for the operator to perform a series of operations by himself. On the other hand, when the band tip does not reach the predetermined position S after passing through the band guide arch 2, the processing of the band tip arch from the band guide arch 2 to the control unit 5 as shown in FIG. 6, the tip of the band is pulled back in the direction of arrow R.
The cut portion is cut by the above, the cut portion is again fed to the band guide arch 2 side, and a tiltable split passage 7 is provided in the middle of a series of band passages, and one end of the split passage 7 is plunged. By lowering at 12, one end side is tilted downward with the other end P of the divided passage 7 as a fulcrum,
Accordingly, the present applicant has provided a packing machine for automatically discharging the cut end of the band from the dividing passage 7 to the outside of the packing machine via the discharge roller 8 and the discharge shooter 9 (Japanese Utility Model Application Laid-Open No. 3-66804). Gazette).

[0005]

However, in such an automatic packing machine having such an automatic discharging device for the band tip, it is necessary to perform normal banding in order to automatically discharge the band tip. No sensor 11 split passage 7
Or a band non-existence detection sensor for detecting whether or not a band exists near the predetermined position S is required. Further, since the band arrival detection sensor detects whether or not the tip of the band fed by the band supply means has correctly reached the predetermined position S of the control unit 5, such a sensor is necessary. As a result, there is a problem that the number of parts increases.

When the cut end of the band is discharged by the discharge roller 8, the band end sent to the discharge roller 8 slides on the divided path 7 by its own weight. There is also a problem that it takes some time for the tip to be clamped. The present invention has been made in view of such circumstances, when the band tip sent from the pool box is caught in the middle of the band guide arch,
Automatically and quickly, with a small number of parts, the process of automatically pulling back the band tip to cut out the defective part and discharging the cut band tip out of the packing machine It is an object of the present invention to provide an automatic discharging device for a band end portion in a packing machine.

[0007]

According to the present invention, there is provided an automatic packing apparatus for automatically discharging a band end portion in an automatic packing machine, which packs a U-shaped band guide arch having a loop-shaped band passage. Prepared at the top of the machine body,
After clamping the band tip fed to the control section through the band guide arch by the band feeding means for feeding the band, pulling back the band from the band supply side, tightening, and melting the band overlapped section by the heater,
In an automatic packing machine that cuts and attaches the band supply side,
Of the band passages formed on the upper surface of the packing machine main body, the predetermined region on the control unit side is configured as a divided passage that can be tilted downward, and the band withdrawal roller of the band withdrawal means at the time of band withdrawal. By detecting the number of revolutions, it is detected that the tip of the band sent to perform banding has not reached the predetermined position of the control unit, and that the tip of the band has not reached the predetermined position. Is detected, the divided passage is inclined, and then the band supply means is driven again to feed the band tip to the inclined divided passage side by the driving force, and further downstream of the divided passage. The sensor detects that the leading end of the band has been fed to the discharge roller by the sensor. Then, after the driving of the band supply means is stopped, the rear end of the band is cut by the control unit. Thereafter, the discharge roller is driven, and the driving force of the discharge roller causes the tip of the cut band to be cut. The part is discharged outside the packing machine main body.

According to the present invention having such a configuration, the fact that the tip of the band does not reach the predetermined position of the control section due to the twist of the tip of the band indicates that the discharge roller of the band pull-back means for pulling back the band. Since the determination is made by detecting the number of rotations, it is possible to detect a failure in reaching the tip of the band using a component provided in a normal banding machine. In such a case, the split passage is tilted, the band tip is forcibly guided into the split passage by the band supply means, and further guided to the discharge roller. The driving force of the discharge roller automatically moves the band tip. Since the band is discharged to the outside of the packing machine, the band tip can be discharged quickly.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows an automatic packing machine provided with an automatic band discharging device according to an embodiment of the present invention. In this automatic packing machine 20, a band guide arch 22 having a substantially U-shape is provided at the upper part of the packing machine body 21, and a series of bands forming a loop on the packing machine body 21 is provided in the band guiding arch 22. A passage 23 is formed.

On the other hand, a pool box 24 is defined below the front surface of the packing machine body 21. A predetermined amount of bands are drawn into the pool box 24 from a large number of bands wound around the band reel 25. When banding is actually performed, the amount of bands to be used is removed from the pool box 24. The paper is fed to the guide arch 22 side.

A balance bar 27 is provided in the pool box 24 to detect how much band is present, and the balance bar 27 is left by detecting the force pressing the balance bar 27. The band amount is determined, and the band is automatically replenished from the band reel 25 when the band amount is equal to or less than the predetermined amount. And when performing banding, the band in the pool box 24 is
The water is fed to the band guide arch 22 side by the control unit 28 provided on the upper part of the pool box 24.

The control section 28 has a band supply means 30 for supplying a band from the pool box 24 located below the figure to the band guide arch 22 side, as shown in the explanatory view of FIG. The band has band retraction means 31 for retracting the band from the guide arch 22, and band tightening means 32 for further tightening the retracted band, each of which is constituted by a pair of rollers.

The one of these three rollers, one of the touch rollers 30a, 31a, 32a, is supported by eccentric shafts 65, 66, 67, respectively, and rotates the eccentric shafts. As a result, the touch roller 30
a, 31a and 32a are respectively connected to the other drive roller 30.
b, 31b, and 32b are configured to be in a posture of either pressing or separating. Therefore, when a force is applied to the band such that the band is sent or pulled back, these touch rollers 30a, 31
a and 32a are arranged so as to abut against the peripheral surfaces of the driving rollers 30b, 31b and 32b, and when no force is applied to the band, they are arranged apart from each other so that no load is applied to the band feeding by other rollers. You. In FIG. 2, for convenience, all are in contact.

Further, in the control section 28, a band B surrounding the package 36 is provided downstream of the band retraction means 31.
Is pinched by the tip of the block 39, and the band is pulled back to the pool box 24 side by the band pulling means 31, and then tightened by the band tightening means 32.
Further, a cutting device 35 is provided for melting the overlapped portion of the tightened band with the heater 40, cutting the band supply side with the cutter 41, and bonding. In FIG. 2,
Reference numeral 34 denotes a band guide that can be moved in the horizontal direction.

The control unit 2 having such a configuration
At 8, the supply and retraction of the band
If one roller is configured to be rotatable in the forward and reverse directions, one roller can be shared. The band tightening means 32
Can be constituted by a well-known tension arm without being constituted by a roller. As described above, the band supply, pulling back, tightening means, and the like are not limited to the embodiment.

On the other hand, downstream of the cutting device 35, as shown in FIG. 1, a divided passage 37 which can be tilted about a shaft 38 as a fulcrum is formed independently in the middle of a series of band passages 23. As shown in FIGS. 3 to 5, the divided passage 37 includes a passage X formed on the upper surface of the sloped top plate 44 and a passage Y formed on the lower surface of the top plate 44. It has two independent band passages.

On the other hand, obliquely below the divided passage 37, FIG.
As shown in (1), a discharge shooter 60 is disposed, and a discharge roller 61 is provided in the middle of the discharge shooter 60. Further, a discharge shooter 60 downstream of the discharge roller 61 is provided.
A sensor 62 that optically detects that the band tip has arrived at this portion is installed in the vicinity of. Below the divided passage 37, a pin cylinder 50 for selectively displacing the posture of the divided passage 37 to an upper position or a lower position is provided. As the rod 51 of the pin cylinder 50 extends, the divided passage 37 is
From the posture of FIG. 4 to the posture of FIG. That is, the divided passage 37 is formed so as to rotate counterclockwise from the state of FIG. 3 around the shaft 38 as a fulcrum, so that the end on the shaft 38 side faces downward.

In the automatic packing machine provided with such a divided passage 37, the divided passage 37 is moved to the position shown in FIG.
, Whereby the upper passage X is used. When there is a defective portion at the tip of the band and the defective portion is to be discharged, the divided passage 37 is in the state shown in FIG. 4, and the lower passage Y is used. The automatic discharge device in the automatic packing machine according to the present embodiment is configured as described above, and its operation will be described below.

First, in normal banding, when a predetermined amount of band is fed from the pool box 24 by the driving force of the band supply means 30, the band tip is supplied to the band guide arch 22 side. In this case, the band tip is supplied to the band guide arch 22 side through the passage X on the upper side of the divided passage 37, and a predetermined banding operation such as pulling back and tightening is performed by the control unit 28.

On the other hand, a case where the band tip is twisted or the like and the band tip cannot reach a predetermined position during banding will be described. If the tip of the band is caught in the band guide arch 22 and does not reach the predetermined position, the amount of the band sent into the band guide arch 22 is shorter than the normal length. Therefore, when the band is pulled back by the band retraction unit 31 from this state, the band tip passes through the band retraction unit 31 earlier in time than in a normal case. When the tip of the band completely passes between the rollers 31a and 31b of the band retraction means 31, no force is applied to the band, and the band stops near the band. Then, no load is applied between the rollers 31a and 31b of the band retraction unit 31, and the number of rotations between the rollers 31a and 31b decreases. The control device (not shown) determines that the rotation speed has decreased, and thereby it is determined that the band tip has not reached the predetermined position.

Then, the pin cylinder 50 is driven this time based on the identification signal of the arrival failure. And
By driving the pin cylinder 50, the divided passage 37 is moved to the position shown in FIG.
It is inclined like. Also, in synchronization with this, the band supply means 30 is driven again, and the band tip stopped halfway is supplied clockwise again, and the band tip is divided into the inclined passage 37 as shown in FIG. It is guided in the passage Y.

The leading end of the band guided to the passage Y side of the divided passage 37 in this manner is quickly guided to the discharge roller 60 side by the driving force of the band supply means 30 at the rear end side.
At this time, like the touch roller 30a of the band supply means 30, the discharge roller 61 has one touch roller 61a supported by an eccentric shaft 69, so that the touch roller 61a is a peripheral surface of the drive roller 61b. Is away from Accordingly, the leading end of the band is fed between the rollers and downstream of the discharge roller 61. When the band end reaches the downstream of the discharge roller 61 in this way, the sensor 62 detects that the band end has reached. On the basis of this detection signal, the driving of the band supply means 30 which has been transmitting the band is stopped. Following this,
The cutting device 35 of the control unit 28 is driven, and the rear end side of the band tip is cut by the cutter 41 shown in FIG. As a result, the tip of the band existing in the divided passage 37 is cut short. When the tip of the band is cut in this manner, the touch roller 61a of the discharge roller 61 is brought into contact with the peripheral surface of the drive roller 61b based on the signal, and the discharge roller 61 starts rotating. As a result, the band tip is quickly discharged from the discharge chute 60 by the driving force of the discharge chute 61 this time.

Further, in this embodiment, as the band tip is discharged from the discharge shooter 60, the driving of the discharge roller 61 is stopped, and the divided passage 37 returns to the position shown in FIG. Thus, when the normal banding is performed, the cut and renewed band tip can be banded through the passage X on the upper side of the divided passage 37. As described above, according to the present embodiment, when a defect occurs at the band tip, the band tip can be automatically and promptly discharged.

Further, by using the automatic discharging device of the band end portion according to the present embodiment, the end of the band wound on the band reel 25 is detected, and the band remaining in the pool box is automatically discharged. You can also. In that case, it is sufficient that the paper is discharged to the outside of the packing machine by the discharge roller 61 without being cut by the cutting device 35.

[0025]

As described above, according to the automatic discharging device of the band tip in the automatic packing machine according to the present invention,
Since it is not necessary to newly provide a sensor, a timer, and the like to detect the occurrence of a defect in the band feed, the configuration becomes compact. In addition, since the band is supplied to the discharge chute by the band supply means quickly, the defective tip of the band can be quickly discharged.

[Brief description of the drawings]

FIG. 1 is a front view of an automatic packing machine provided with an automatic discharging device of a band tip portion according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a control unit of the automatic packing machine.

FIG. 3 is a sectional view of a divided passage portion which is a main part of the embodiment.

FIG. 4 is a cross-sectional view showing an operation of discharging the tip of the band by the automatic discharging device according to the embodiment.

FIG. 5A is a perspective view of a divided passage according to the embodiment, and FIG. 5B is a perspective view of the same when the posture of the divided passage is reversed.

FIG. 6 is a perspective view of a conventional automatic packing machine.

FIG. 7 is a sectional view of a conventional automatic discharge device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Automatic packing machine 21 Packing machine main body 22 Band guide arch 23 Band passage 28 Control part 30 Band supply means 31 Band retraction means 32 Band tightening means 37 Split passage 60 Discharge shooter 61 Discharge roller 62 Sensor X, Y passage

Claims (1)

[Claims] A U-shaped band guide arch having a loop-shaped band passage is provided at an upper portion of a packing machine main body,
After clamping the band tip fed to the control section through the band guide arch by the band feeding means for feeding the band, pulling back the band from the band supply side, tightening, and melting the band overlapped section by the heater,
In an automatic packing machine that cuts and adheres a band supply side, in a band passage formed on an upper surface of the packing machine main body, a predetermined region on the control unit side is configured as a divided passage that can be tilted downward. By detecting the number of rotations of the band retraction roller of the band retraction unit at the time of retraction of the band, it is detected that the tip of the band sent for performing banding has not reached the predetermined position of the control unit. When it is detected that the band tip has not reached the predetermined position, the split passage is inclined, and then the band supply means is driven again, and the band tip is inclined by the driving force. The band is fed to the split passage side, and further guided to the discharge roller side provided downstream of the split passage, and the band tip is fed to the discharge roller. While detecting with the sensor, and after stopping the driving of the band supply means based on this detection signal, cut the rear end of the band by the control unit, and then drive the discharge roller, An automatic discharging device for an end portion of a band in an automatic packing machine, wherein the cut end portion of the band is discharged to the outside of the packing machine body by the driving force of the discharge roller.