JPH06142544A - Bag breaking apparatus - Google Patents

Abstract

PURPOSE:To provide a bag breaking apparatus with a simple structure and being inexpensive. CONSTITUTION:A belt conveyer 9 for pinchedly carrying is positioned above a breakable bag carrying conveyer 1 for carrying vinyl bags and the gap between both conveyers is made gradually narrower to the forward direction and vinyl bags with which empty cans and bottles are recovered are passed through this gap. A number of cutting blades 6 are projectedly provided on the carrying face of the breakable bag carrying conveyer 1 and in addition, a difference in belt speed is given to both conveyers and the vinyl bags are cut by moving the vinyl bags and the cutting blades 6 while they are deviated each other. In addition, the lower part of the belt conveyer 9 for pinchedly carrying pushes always the vinyl bags under a const. force by means of a press roller 20 and when a load being at least necessary level is applied on the lower part of the belt, the press roller 20 is retreated to prevent overloading from being applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag breaking device for breaking a plastic bag in which empty cans such as soft drinks sent to a recycling factory are collected.

[0002]

2. Description of the Related Art In recent years, empty cans such as soft drinks have been recycled at recycling factories, and empty cans collected from vending machines, shops and households are packed in plastic bags for recycling. The number of cases brought to the factory is very large.

The vinyl bag containing empty cans sent to the recycling factory is first placed on a belt conveyor to take out the empty cans and is transferred to the bag breaking process. As a bag breaking device used in this bag breaking process, it is known that a bag breaking plate having a large number of cutting blades mounted on a belt conveyor is arranged so as to be vertically movable. The cutting blade of the crushing plate is pressed against the plastic bag conveyed by the above to tear it.

[0004]

However, in the system in which the bag-breaking plate is pressed against the vinyl bag placed on the belt conveyor as described above to break the bag, a large load is applied to the belt surface, resulting in abrasion and tensile force. On the other hand, it is necessary to use a strong belt, and the frame of the belt conveyor needs to be reinforced so as to withstand the load from above, which makes the apparatus considerably expensive.

In view of the above points, an object of the present invention is to provide a bag-breaking device which can be manufactured with a simple structure and a low cost by devising a method of bag-breaking a vinyl bag.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a breakage in which a large number of cutting blades are projected at appropriate intervals on the conveying surface of a conveying belt wound around a head pulley and a tail pulley. A sandwiching belt conveyor for sandwiching a bag to be crushed is disposed above the bag conveying conveyor, and the interval between the sacked bag conveying conveyor and the sandwiching belt conveyor is gradually narrowed in the traveling direction and is A plurality of pressing bodies that run at different belt speeds and constantly press and urge the lower belt downward with a constant force on the belt conveyor for pinching can be moved up and down while maintaining appropriate intervals along the longitudinal direction of the belt. It is arranged.

[0007]

According to the present invention, when a vinyl bag containing empty cans is supplied to a conveyor for conveying a bag-destroyed object, the vinyl bag is sandwiched at a higher position as it is moved forward by the conveyor for conveying a bag-destroyed object. It will be sandwiched between the belt conveyor for sending. The distance between the crushed bag conveying conveyor and the pinching belt conveyor is gradually narrowed in the traveling direction, and the pile of vinyl bags on the conveyor is gradually collapsed and transferred. At this time, due to the difference in the belt speed between the conveyor for conveying bag-breakable items and the belt conveyor for pinching, the vinyl bag moves at a different moving speed than the cutting blade protruding on the conveying surface of the conveyer for bag-like items. Will be torn by the cutting edge.

Further, since the lower belt of the belt conveyor for pinching is pressed downward by the pressing body with a constant force to press the vinyl bag, the lower blade of the conveyor for conveying the sacked bag conveys the material. The vinyl bag can be reliably torn, and if the lower belt of the conveyor belt conveyor is unnecessarily loaded due to the vinyl bag being clogged, the pressing body will retract and the cutting blade and other drive parts will be overloaded. It is also possible to avoid.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 is a conveyer for conveying a bag to be broken, which conveys a plastic bag which is a bag to be broken, in which a head pulley 3 is arranged at a front portion of a gantry 2 and a tail pulley 4 is arranged at a rear portion thereof.
A conveyor belt 5 is wound around each of these pulleys so that the pulleys can travel freely.

A large number of cutting blades 6 for cutting a vinyl bag are projected on the carrying surface of the carrying belt 5 at appropriate intervals in the width direction and the length direction of the carrying belt 5. The tip of the cutting blade 6 has a shape that sharply cuts into the vinyl bag, and its height is designed appropriately according to the contents of the vinyl bag. Further, the cutting blades 6 are arranged in parallel or in a staggered manner on the conveying surface, and their intervals are also appropriately determined according to the size of the vinyl bag and the like. A holding member 7 for fixing the cutting blade 6 to the conveying surface in order to make the cutting blade 6 detachable is fixed, and the cutting blade 6 is attached to the holding member 7 to fasten bolts, nuts and the like. So that it can be fixed with the tool 8,
It may also have a structure that can be attached with one touch.

A conveyor belt conveyor 9 for sandwiching and transferring a vinyl bag is disposed above the conveyor 1 for conveying the sacked object. The machine frame 10 of the pinching belt conveyor 9 is bent in the middle, the rear end of the machine frame 10 is flipped upward to incline the latter half of the machine frame 10, and the head pulley is attached to the front end of the machine frame 10. 11, a tail pulley 12 is arranged at a rear end portion, and a belt 13 is wound around each pulley. The sandwiching belt conveyor 9 is arranged such that its interval is gradually narrowed toward the advancing direction side with respect to the conveyor 1 for transporting bags to be broken. It is held at a distance that allows the plastic bag and its contents to pass through.

Further, the machine frame 10 of the belt conveyor 9 for pinching.
An air cylinder 15 is attached to the horizontal member 14 which is attached at an appropriate pitch to the lower belt 13a, and a support plate 17 is fixed to the tip of the piston rod 16 of the air cylinder 15. A slide shaft 19 having a coil spring 18 interposed therein is loosely fitted to the support plate 17, and a pressing roller 20 for pressing the lower belt 13a downward is attached to the lower end of the slide shaft 19 and the slide shaft 1
A retaining piece 21 for retaining the shaft is attached to the upper end portion of the shaft 9, and the lower belt 13a is pressed and urged downward by the elastic force of the coil spring 18.

The air cylinder 15 also extends the piston rod 16 with a constant pressing force to lower the belt 13a.
Is constantly pressed downward with a constant pressure. When a small upward load is applied to the lower belt 13a, the coil spring 18 is contracted so that the pressing roller 20 is raised, and when a larger load than the pressing force of the air cylinder 15 which is always under pressure is applied, the air cylinder 15 Piston rod 1
4 is contracted so that the pressing roller 20 rises. In this way, the pressure roller 20 supporting the lower belt 13a moves up and down appropriately according to the load to press the vinyl bag with an appropriate force, and absorbs the overload to prevent the device from being damaged.

Reference numeral 22 is a side plate of an appropriate height which is erected on both sides of the conveyor 1 for conveying the sacked object, so that the vinyl bag on the conveyor 1 for conveying the sacked object and the contents of the spilled bag are spilled. It is preventing.

Numeral 23 is a hopper for loading a vinyl bag disposed at an end portion of the conveyor 1 for transporting a bag to be broken, and a vinyl bag loaded from an upper opening 24 is dropped onto the conveyor 1 for transporting a bag to be transported. It is supposed to be stored. In addition,
The hopper 23 may have a structure in which a discharge gate is disposed in a lower position, and the hopper 23 may be opened as needed to discharge the vinyl bag.

In the case of breaking a plastic bag containing empty cans and empty bottles, the conveyor 1 for conveying the sacked object 1 and the belt conveyor 9 for pinching are driven so that the respective belt speeds are made to run differently from each other. . Then, when a vinyl bag is put into the hopper 23 by using a shovel loader or the like, the vinyl bag is dropped onto the conveyor 1 for conveying the bag bag to be broken and pulled out forward. Further, when the vinyl bags are further put into the hopper 23, they are accumulated between the conveyor 1 for conveying bag-breakable articles and the belt conveyor 9 for pinching. The vinyl bag is pushed forward while the plastic bag is partially torn by the cutting blade 6.

The vinyl bag pushed forward by the conveyer 1 for conveying the sacked bag is pushed downward by the lower belt 13a of the belt conveyor 9 for pinching, and the mountain of the vinyl bag gradually collapses, and finally It will be pushed into a narrow gap that allows one plastic bag to pass through. Since the vinyl bag is pressed and conveyed by the conveyer belt conveyor 9 for conveying the bagged article and the belt conveyor 9 for pinching, which has a different belt speed, the cutting blade 6 of the conveyer belt for conveying the broken bag article 1 cuts into the vinyl bag and the vinyl bag is cut. Cut the bag.

A load is applied to the lower belt 13a of the pinching belt conveyor 9 for pressing the vinyl bag from above, but if the load is small, the pressing roller 20 supporting the lower belt 13a is pressed and biased. The coil spring 18 that expands and contracts to move the pressing roller 20 up and down to absorb the load. In addition, if a large load is applied due to a plastic bag being clogged, and the pressure exceeds the pressure of the air cylinder 15 that pushes down the pressure roller 20 with a constant force, the piston rod 16 is pushed in to absorb the load and damage the device. Prevent it. Thus, the belt conveyor 9 for pinching
The pressing roller 20 that supports the lower belt 13a moves up or down by a small amount or a large amount to guide and guide the vinyl bag while absorbing an overload when the vinyl bag is transferred.

A conveyor such as a chain conveyor may be used instead of the conveyor 1 for conveying the sacked bag or the belt conveyor 9 for pinching, and the lower belt 13a of the belt conveyor 9 for pinching elastically. The air cylinder 15 and the coil spring 18 are combined to press downward, but only the air cylinder 15 may be used.
Other pressing means may be adopted instead of the coil spring 18.

[0021]

As described above, according to the present invention, a large number of cutting blades 6 are provided on the conveyor belt 5 of the conveyor 1 for conveying bags to be broken for conveying vinyl bags, and the conveyor 1 for conveying bags to be broken 1 is also provided. A belt conveyor 9 for sandwiching a vinyl bag is disposed on the upper side of the bag, and the interval between the conveyor 1 for conveying the bag to be broken and the belt conveyor 9 for sandwiching is gradually narrowed in the traveling direction to convey the bag to be broken. The conveyor 1 and the pinching belt conveyor 9 are made to travel with different belt speeds, and the lower belt 13a of the pinching belt conveyor 9 is elastically pressed downward by an appropriate pressing force to cause a vinyl bag The mechanism is simple and inexpensive to fabricate, and the pile of collected vinyl bags is not placed on the conveyor 1 for transporting the sacked objects one by one while placing an excessive load on the device. It is possible to efficiently breakage.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic front view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conveyor for conveying sacked objects 5 ... Conveying belt 6 ... Cutting blade 9 ... Narrowing belt conveyor 13a ... Lower belt 15 ... Air cylinder 20 ... Pressing roller (pressing body)

Claims (1)

[Claims] 1. A sandwiching device for sandwiching a bag to be sacked above a conveyor for transporting a bag to be sacked, in which a large number of cutting blades are projected at appropriate intervals on a transporting surface of a transporting belt wound around a head pulley and a tail pulley. A belt conveyor is provided, and the interval between the conveyor for conveying the bag to be broken and the belt conveyor for pinching is gradually narrowed in the traveling direction, and the belt conveyors for running are made to travel at different belt speeds. A bag breaking device, in which a plurality of pressing bodies for constantly pressing downwardly with a constant force are arranged so as to be movable up and down along the longitudinal direction of the belt while maintaining appropriate intervals.