JPH07277313A - Tied-band untying machine - Google Patents

Abstract

PURPOSE:To obtain a tied-band untying machine in which clogging of plastic bands is avoided. CONSTITUTION:In a tied-band untying machine, a band 3 which ties goods is pulled near by a hook 5, fusion-cut by a heater 16, clamped by rollers 7 and 8, drawn near and cut into pieces. The tied-band untying machine is equipped with a detector 12 to detect the end of the band 3 which is draw near and is under cutting process, a holder 14 which is situated between the rollers 7 and 8 and the detector 12 and presses the end of the band 3 on to another band 3 that is pulled near by the hook 5 to fusion-cut it next, and a welder 15 which welds the two bands to joint them. The rollers 7 and 8 are stopped while the two bands are under welding and the band 3 that is pulled near by the hook 5 after welding is fusion-cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding band unwinding device for unfastening and shredding a band that binds articles.

[0002]

2. Description of the Related Art For example, an empty container filled with a beverage is palletized, bound with a plastic band, and carried into a filling line. On the filling line, the binding band is released,
The empty container is sent to the beverage filling process, and the debunched plastic band is collected and processed.

As a device for the above-mentioned recovery processing, the bundled plastic band is pulled by a hook, sandwiched between opposed rotating rollers, the plastic band is melted by a heater, and the rotating roller is rotated to melt it. There is one in which a plastic band is pulled up and shredded by a cutting blade that periodically bites the plastic band fed by a rotating roller through a chute.

FIG. 3 is a side view showing a conventional binding band unwinding device. As shown in FIG. 3, a large number of containers 2 are stacked on the pallet 1 via a base plate 20 in multiple stages. Then, the pallet 1 and the containers 2 stacked in multiple stages
Are bound together by a plastic band 3.

[0005] The binding band unwinding device is for hooking the plastic band 3 to pull it, a pair of rotating rollers 32 and 33 facing each other for holding the plastic band 3, and fusing the plastic band 3 by fusion. The heater 34, a chute 35 for guiding the melted plastic band 3, and a shredding portion 36 for shredding the sent plastic band 3 are provided. Immediately upstream of the shredded portion 36, rotary rollers 37 and 38 for supplying the plastic band 3 to the shredded portion 36 are provided.

[0006]

However, in the above-mentioned apparatus, since the plastic bands are individually recovered one by one, the plastic bands remaining on the chute 35 between the rotating rollers 37, 38 and the shred portion 36 are collected. There is a problem that the end of No. 3 and the starting end of the plastic band 3 which has been recoiled next overlap each other and get stuck in the chute 3. In addition, since the collected plastic band 3 is distorted due to the habit at the time of bundling, there is a problem that the starting end of the plastic band 3 which is next disentangled does not fit into the chute at the chute entrance and is blocked.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a binding band unwinding device capable of eliminating clogging of a plastic band.

[0008]

In order to achieve the above-mentioned object, the present invention is to draw a band that binds articles by a hook, melt them with a heater, and sandwich the melted band with a rotating roller to squeeze it. A binding band debinding device for shredding a tethered band into a large number of small pieces,
The band which is provided between the rotating roller and the detection unit, which is already detected and detects the end of the band being shredded, and then pulled by the hook to be melted And a welding portion for welding and joining the two bands held by the holding portion. When the two bands are welded, the rotating roller is attached. The present invention is characterized in that the band pulled by the hook is stopped by fusing after the welding is stopped.

[0009]

According to the present invention having the above-mentioned structure, when the detecting portion detects the end of the preceding band which is already shredded by the rotating roller and is being shredded, the rotating roller stops, and then the band is cut. The end of the is pressed against a subsequent band that has been pulled by the hook, after which the two bands are welded by the weld. Then, after the two bands are welded, the subsequent band that has been pulled is fused. Therefore, the band is collected as a continuous single piece and continuously sent to the shredding part to be shredded, so that there is no end and start end for each band that is bound, and The clogging of the band due to the start end is eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the binding band unwinding device according to the present invention will be described below with reference to FIGS. FIG. 1 is a side view showing the overall configuration of the binding band unwinding device, and FIG. 2 is a plan view showing the main parts of FIG. In this embodiment, a container will be described as an example of the article. As shown in FIG.
A large number of containers 2 are stacked on the pallet 1 via a base plate 20 in multiple stages. The pallet 1 and the multi-tiered containers 2 are integrally bound by a plastic band 3.

The binding band unwinding device M includes a hook 5 having an air cylinder 4 for engaging the plastic band 3 and pulling the plastic band 3 and a heater for melting and cutting the pulled plastic band 3. 6 and
From a pair of opposed rotating rollers 7 and 8 for pulling the melted plastic band 3 in between, and a fixed blade 10a and a rotary blade 10b for cutting the scraped plastic band 3 into a large number of small pieces. Shredded part 10
It has and.

A chute 11 for guiding the melted plastic band 3 is provided between the hook 5 and the rotary rollers 7, 8 and between the rotary rollers 7, 8 and the shredded portion 10.
Is provided. And below the chute 11,
An end detection sensor 12 for detecting the end 3e of the plastic band 3 which has already been dragged and whose tip is being shredded by the shredder 10 is installed. Further, between the end detection sensor 12 and the lower end of the chute 11, the end of the plastic band 3 is pressed against the plastic band 3 pulled by the hook 5 so as to be melted and then grasped. A grip portion 14 having an air cylinder 13 is provided.

Adjacent to the grip portion 14, a welding portion 15 for welding and joining the two plastic bands 3 gripped by the grip portion 14 and the hook 5 is provided. The welding portion 15 is composed of a rod-shaped heater 16 which is inserted into a hole 14a formed in the grip portion 14 and whose tip can abut the plastic band 3, and an air cylinder 17 for moving the heater 16 forward and backward. The heater 16 is pressed against the plastic band 3 in a state in which the two plastic bands 3 are gripped by the grip portion 14 and the hook 5.

Next, the operation of the binding band unwinding device constructed as described above will be described. A large number of containers 2 stacked on the pallet 1 and bound by the plastic band 3 are conveyed by the conveyor 18 to the position of the binding band unwinding device M and stopped at this position. At this time, the hook 5 is in the forward position (the hatched position in FIG. 2) by operating the air cylinder 4, and engages with the plastic band 3 that binds the containers 2 in multiple stages. next,
After the pallet 1 is slightly lifted by a lifter (not shown), the air cylinder 4 is operated to return the hook 5 to the retracted position (solid line position in FIG. 2), whereby the plastic band 3 is pulled toward the apparatus M side. FIG. 1 shows this state.

At this time, between the shredded portion 10 of the device M and the position of the end detection sensor 12, there is the preceding plastic band 3 already shredded by the rotating rollers 7 and 8 and being shredded. ing. The leading end 3e of the preceding plastic band 3 is the end detection sensor 1
Since the rotating rollers 7 and 8 are stopped when detected by 2, they remain between the shredded portion 10 and the position of the end detection sensor 12. Next, the air cylinder 13 is operated to move the grip portion 14 forward, and the grip portion 14 and the hook 5 grip the preceding plastic band 3 and the subsequent plastic band 3 pulled by the hook 5.

With the two plastic bands 3 superposed and gripped, the air cylinder 17 is operated to move the heater 16 forward, and the two plastic bands 3 are welded and joined. When this welding is completed, the heater 6 is pressed against the subsequent plastic band 3 pulled by the hook 5 to melt it. As a result, the preceding plastic band 3 and the succeeding plastic band 3 are joined together to become a single article. Next, the rotary rollers 7 and 8 are driven to rotate again, and the rotary blade 10a of the shredder 10 is driven to rotate to shred the single plastic band 3 into a large number of small pieces. During this shredding, the conveyor 18 is driven to engage the next plastic band 3 with the hook 5 to prepare for the next welding. By repeating the above operation, a large number of plastic bands can be shredded and processed as one continuous product.

In order to recover the first plastic band that is bound by operating the device M for the first time, it is necessary to predict the distance between the shredding portion 10 and the end detection sensor 12 in advance. Therefore, it is necessary to set a dummy band.

[0018]

As described above, according to the present invention, the end portion of the preceding band which has already been scooped and is being shredded is welded to the band which is next drawn, and after this welding,
The drawn band is fused. Therefore, the band is collected as a continuous single piece and continuously sent to the shredding part to be shredded, so that there is no end and start end for each band that is bound, and The clogging of the band due to the start end is eliminated. In addition, even if the band is distorted due to the habit of binding, it is a genuine item and will pass without being stuck in the chute.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a binding band unbinding device according to the present invention.

FIG. 2 is a plan view showing a main part of the binding band unwinding device according to the present invention.

FIG. 3 is a side view showing a conventional binding band unwinding device.

[Explanation of symbols]

 1 Pallet 2 Container 3 Plastic Band 5 Hook 6 Heater 7,8 Rotating Roller 10 Shredding Part 11 Chute 12 End Detection Sensor 14 Gripping Part 15 Welding Part 16 Heater 18 Conveyor

Front Page Continuation (72) Inventor Takeshi Akita 1880 Shimosakuen, Takatsu-ku, Kawasaki-shi, Kanagawa

Claims (2)

[Claims] 1. A device for pulling a band that binds articles together with a hook, fusing with a heater, sandwiching the fused band with a rotating roller, and scooping the swollen band into a number of small pieces. A binding band unwinding device, which is provided between the rotary roller and the detection unit, the detection unit detecting the end of the band being shredded and being shredded, and the hook to be fused next. And a welding part for welding and joining the two bands gripped by the gripping part to each other. When the band is welded, the rotating roller is stopped so that the band pulled by the hook after the welding is melted and cut. 2. The binding band unwinding device according to claim 1, wherein the band is a plastic band.